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QEMU RISC-V Emulation Support (RV64GC, RV32GC)

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This release renames the SiFive machines to sifive_e and sifive_u
 to represent the SiFive Everywhere and SiFive Unleashed platforms.
 SiFive has configurable soft-core IP, so it is intended that these
 machines will be extended to enable a variety of SiFive IP blocks.
 The CPU definition infrastructure has been improved and there are
 now vendor CPU modules including the SiFiVe E31, E51, U34 and U54
 cores. The emulation accuracy for the E series has been improved
 by disabling the MMU for the E series. S mode has been disabled on
 cores that only support M mode and U mode. The two Spike machines
 that support two privileged ISA versions have been coalesced into
 one file. This series has Signed-off-by from the core contributors.
 
 *** Known Issues ***
 
 * Disassembler has some checkpatch warnings for the sake of code brevity
 * scripts/qemu-binfmt-conf.sh has checkpatch warnings due to line length
 * PMP (Physical Memory Protection) is as-of-yet unused and needs testing
 
 *** Changelog ***
 
 v8.2
 
 * Rebase
 
 v8.1
 
 * Fix missed case of renaming spike_v1.9 to spike_v1.9.1
 
 v8
 
 * Added linux-user/riscv/target_elf.h during rebase
 * Make resetvec configurable and clear mpp and mie on reset
 * Use SiFive E31, E51, U34 and U54 cores in SiFive machines
 * Define SiFive E31, E51, U34 and U54 cores
 * Refactor CPU core definition in preparation for vendor cores
 * Prevent S or U mode unless S or U extensions are present
 * SiFive E Series cores have no MMU
 * SiFive E Series cores have U mode
 * Make privileged ISA v1.10 implicit in CPU types
 * Remove DRAM_BASE and EXT_IO_BASE as they vary by machine
 * Correctly handle mtvec and stvec alignment with respect to RVC
 * Print more machine mode state in riscv_cpu_dump_state
 * Make riscv_isa_string use compact extension order method
 * Fix bug introduced in v6 RISCV_CPU_TYPE_NAME macro change
 * Parameterize spike v1.9.1 config string
 * Coalesce spike_v1.9.1 and spike_v1.10 machines
 * Rename sifive_e300 to sifive_e, and sifive_u500 to sifive_u
 
 v7
 
 * Make spike_v1.10 the default machine
 * Rename spike_v1.9 to spike_v1.9.1 to match privileged spec version
 * Remove empty target/riscv/trace-events file
 * Monitor ROM 32-bit reset code needs to be target endian
 * Add TARGET_TIOCGPTPEER to linux-user/riscv/termbits.h
 * Add -initrd support to the virt board
 * Fix naming in spike machine interface header
 * Update copyright notice on RISC-V Spike machines
 * Update copyright notice on RISC-V HTIF Console device
 * Change CPU Core and translator to GPLv2+
 * Change RISC-V Disassembler to GPLv2+
 * Change SiFive Test Finisher to GPLv2+
 * Change SiFive CLINT to GPLv2+
 * Change SiFive PRCI to GPLv2+
 * Change SiFive PLIC to GPLv2+
 * Change RISC-V spike machines to GPLv2+
 * Change RISC-V virt machine to GPLv2+
 * Change SiFive E300 machine to GPLv2+
 * Change SiFive U500 machine to GPLv2+
 * Change RISC-V Hart Array to GPLv2+
 * Change RISC-V HTIF device to GPLv2+
 * Change SiFiveUART device to GPLv2+
 
 v6
 
 * Drop IEEE 754-201x minimumNumber/maximumNumber for fmin/fmax
 * Remove some unnecessary commented debug statements
 * Change RISCV_CPU_TYPE_NAME to use riscv-cpu suffix
 * Define all CPU variants for linux-user
 * qemu_log calls require trailing \n
 * Replace PLIC printfs with qemu_log
 * Tear out unused HTIF code and eliminate shouting debug messages
 * Fix illegal instruction when sfence.vma is passed (rs2) arguments
 * Make updates to PTE accessed and dirty bits atomic
 * Only require atomic PTE updates on MTTCG enabled guests
 * Page fault if accessed or dirty bits can't be updated
 * Fix get_physical_address PTE reads and writes on riscv32
 * Remove erroneous comments from the PLIC
 * Default enable MTTCG
 * Make WFI less conservative
 * Unify local interrupt handling
 * Expunge HTIF interrupts
 * Always access mstatus.mip under a lock
 * Don't implement rdtime/rdtimeh in system mode (bbl emulates them)
 * Implement insreth/cycleh for rv32 and always enable user-mode counters
 * Add GDB stub support for reading and writing CSRs
 * Rename ENABLE_CHARDEV #ifdef from HTIF code
 * Replace bad HTIF ELF code with load_elf symbol callback
 * Convert chained if else fault handlers to switch statements
 * Use RISCV exception codes for linux-user page faults
 
 v5
 
 * Implement NaN-boxing for flw, set high order bits to 1
 * Use float_muladd_negate_* flags to floatXX_muladd
 * Use IEEE 754-201x minimumNumber/maximumNumber for fmin/fmax
 * Fix TARGET_NR_syscalls
 * Update linux-user/riscv/syscall_nr.h
 * Fix FENCE.I, needs to terminate translation block
 * Adjust unusual convention for interruptno >= 0
 
 v4
 
 * Add @riscv: since 2.12 to CpuInfoArch
 * Remove misleading little-endian comment from load_kernel
 * Rename cpu-model property to cpu-type
 * Drop some unnecessary inline function attributes
 * Don't allow GDB to set value of x0 register
 * Remove unnecessary empty property lists
 * Add Test Finisher device to implement poweroff in virt machine
 * Implement priv ISA v1.10 trap and sret/mret xPIE/xIE behavior
 * Store fflags data in fp_status
 * Purge runtime users of helper_raise_exception
 * Fix validate_csr
 * Tidy gen_jalr
 * Tidy immediate shifts
 * Add gen_exception_inst_addr_mis
 * Add gen_exception_debug
 * Add gen_exception_illegal
 * Tidy helper_fclass_*
 * Split rounding mode setting to a new function
 * Enforce MSTATUS_FS via TB flags
 * Implement acquire/release barrier semantics
 * Use atomic operations as required
 * Fix FENCE and FENCE_I
 * Remove commented code from spike machines
 * PAGE_WRITE permissions can be set on loads if page is already dirty
 * The result of format conversion on an NaN must be a quiet NaN
 * Add missing process_queued_cpu_work to riscv linux-user
 * Remove float(32|64)_classify from cpu.h
 * Removed nonsensical unions aliasing the same type
 * Use uintN_t instead of uintN_fast_t in fpu_helper.c
 * Use macros for FPU exception values in softfloat_flags_to_riscv
 * Move code to set round mode into set_fp_round_mode function
 * Convert set_fp_exceptions from a macro to an inline function
 * Convert round mode helper into an inline function
 * Make fpu_helper ieee_rm array static const
 * Include cpu_mmu_index in cpu_get_tb_cpu_state flags
 * Eliminate MPRV influence on mmu_index
 * Remove unrecoverable do_unassigned_access function
 * Only update PTE accessed and dirty bits if necessary
 * Remove unnecessary tlb_flush in set_mode as mode is in mmu_idx
 * Remove buggy support for misa writes. misa writes are optional
   and are not implemented in any known hardware
 * Always set PTE read or execute permissions during page walk
 * Reorder helper function declarations to match order in helper.c
 * Remove redundant variable declaration in get_physical_address
 * Remove duplicated code from get_physical_address
 * Use mmu_idx instead of mem_idx in riscv_cpu_get_phys_page_debug
 
 v3
 
 * Fix indentation in PMP and HTIF debug macros
 * Fix disassembler checkpatch open brace '{' on next line errors
 * Fix trailing statements on next line in decode_inst_decompress
 * NOTE: the other checkpatch issues have been reviewed previously
 
 v2
 
 * Remove redundant NULL terminators from disassembler register arrays
 * Change disassembler register name arrays to const
 * Refine disassembler internal function names
 * Update dates in disassembler copyright message
 * Remove #ifdef CONFIG_USER_ONLY version of cpu_has_work
 * Use ULL suffix on 64-bit constants
 * Move riscv_cpu_mmu_index from cpu.h to helper.c
 * Move riscv_cpu_hw_interrupts_pending from cpu.h to helper.c
 * Remove redundant TARGET_HAS_ICE from cpu.h
 * Use qemu_irq instead of void* for irq definition in cpu.h
 * Remove duplicate typedef from struct CPURISCVState
 * Remove redundant g_strdup from cpu_register
 * Remove redundant tlb_flush from riscv_cpu_reset
 * Remove redundant mode calculation from get_physical_address
 * Remove redundant debug mode printf and dcsr comment
 * Remove redundant clearing of MSB for bare physical addresses
 * Use g_assert_not_reached for invalid mode in get_physical_address
 * Use g_assert_not_reached for unreachable checks in get_physical_address
 * Use g_assert_not_reached for unreachable type in raise_mmu_exception
 * Return exception instead of aborting for misaligned fetches
 * Move exception defines from cpu.h to cpu_bits.h
 * Remove redundant breakpoint control definitions from cpu_bits.h
 * Implement riscv_cpu_unassigned_access exception handling
 * Log and raise exceptions for unimplemented CSRs
 * Match Spike HTIF exit behavior - don’t print TEST-PASSED
 * Make frm,fflags,fcsr writes trap when mstatus.FS is clear
 * Use g_assert_not_reached for unreachable invalid mode
 * Make hret,uret,dret generate illegal instructions
 * Move riscv_cpu_dump_state and int/fpr regnames to cpu.c
 * Lift interrupt flag and mask into constants in cpu_bits.h
 * Change trap debugging to use qemu_log_mask LOG_TRACE
 * Change CSR debugging to use qemu_log_mask LOG_TRACE
 * Change PMP debugging to use qemu_log_mask LOG_TRACE
 * Remove commented code from pmp.c
 * Change CpuInfoRISCV qapi schema docs to Since 2.12
 * Change RV feature macro to use target_ulong cast
 * Remove riscv_feature and instead use misa extension flags
 * Make riscv_flush_icache_syscall a no-op
 * Undo checkpatch whitespace fixes in unrelated linux-user code
 * Remove redudant constants and tidy up cpu_bits.h
 * Make helper_fence_i a no-op
 * Move include "exec/cpu-all" to end of cpu.h
 * Rename set_privilege to riscv_set_mode
 * Move redundant forward declaration for cpu_riscv_translate_address
 * Remove TCGV_UNUSED from riscv_translate_init
 * Add comment to pmp.c stating the code is untested and currently unused
 * Use ctz to simplify decoding of PMP NAPOT address ranges
 * Change pmp_is_in_range to use than equal for end addresses
 * Fix off by one error in pmp_update_rule
 * Rearrange PMP_DEBUG so that formatting is compile-time checked
 * Rearrange trap debugging so that formatting is compile-time checked
 * Rearrange PLIC debugging so that formatting is compile-time checked
 * Use qemu_log/qemu_log_mask for HTIF logging and debugging
 * Move exception and interrupt names into cpu.c
 * Add Palmer Dabbelt as a RISC-V Maintainer
 * Rebase against current qemu master branch
 
 v1
 
 * initial version based on forward port from riscv-qemu repository
 
 *** Background ***
 
 "RISC-V is an open, free ISA enabling a new era of processor innovation
 through open standard collaboration. Born in academia and research,
 RISC-V ISA delivers a new level of free, extensible software and
 hardware freedom on architecture, paving the way for the next 50 years
 of computing design and innovation."
 
 The QEMU RISC-V port has been developed and maintained out-of-tree for
 several years by Sagar Karandikar and Bastian Koppelmann. The RISC-V
 Privileged specification has evolved substantially over this period but
 has recently been solidifying. The RISC-V Base ISA has been frozon for
 some time and the Privileged ISA, GCC toolchain and Linux ABI are now
 quite stable. I have recently joined Sagar and Bastian as a RISC-V QEMU
 Maintainer and hope to support upstreaming the port.
 
 There are multiple vendors taping out, preparing to ship, or shipping
 silicon that implements the RISC-V Privileged ISA Version 1.10. There
 are also several RISC-V Soft-IP cores implementing Privileged ISA
 Version 1.10 that run on FPGA such as SiFive's Freedom U500 Platform
 and the U54‑MC RISC-V Core IP, among many more implementations from a
 variety of vendors. See https://riscv.org/ for more details.
 
 RISC-V support was upstreamed in binutils 2.28 and GCC 7.1 in the first
 half of 2016. RISC-V support is now available in LLVM top-of-tree and
 the RISC-V Linux port was accepted into Linux 4.15-rc1 late last year
 and is available in the Linux 4.15 release. GLIBC 2.27 added support
 for the RISC-V ISA running on Linux (requires at least binutils-2.30,
 gcc-7.3.0, and linux-4.15). We believe it is timely to submit the
 RISC-V QEMU port for upstream review with the goal of incorporating
 RISC-V support into the upcoming QEMU 2.12 release.
 
 The RISC-V QEMU port is still under active development, mostly with
 respect to device emulation, the addition of Hypervisor support as
 specified in the RISC-V Draft Privileged ISA Version 1.11, and Vector
 support once the first draft is finalized later this year. We believe
 now is the appropriate time for RISC-V QEMU development to be carried
 out in the main QEMU repository as the code will benefit from more
 rigorous review. The RISC-V QEMU port currently supports all the ISA
 extensions that have been finalized and frozen in the Base ISA.
 
 Blog post about recent additions to RISC-V QEMU: https://goo.gl/fJ4zgk
 
 The RISC-V QEMU wiki: https://github.com/riscv/riscv-qemu/wiki
 
 Instructions for building a busybox+dropbear root image, BBL (Berkeley
 Boot Loader) and linux kernel image for use with the RISC-V QEMU
 'virt' machine: https://github.com/michaeljclark/busybear-linux
 
 *** Overview ***
 
 The RISC-V QEMU port implements the following specifications:
 
 * RISC-V Instruction Set Manual Volume I: User-Level ISA Version 2.2
 * RISC-V Instruction Set Manual Volume II: Privileged ISA Version 1.9.1
 * RISC-V Instruction Set Manual Volume II: Privileged ISA Version 1.10
 
 The RISC-V QEMU port supports the following instruction set extensions:
 
 * RV32GC with Supervisor-mode and User-mode (RV32IMAFDCSU)
 * RV64GC with Supervisor-mode and User-mode (RV64IMAFDCSU)
 
 The RISC-V QEMU port adds the following targets to QEMU:
 
 * riscv32-softmmu
 * riscv64-softmmu
 * riscv32-linux-user
 * riscv64-linux-user
 
 The RISC-V QEMU port supports the following hardware:
 
 * HTIF Console (Host Target Interface)
 * SiFive CLINT (Core Local Interruptor) for Timer interrupts and IPIs
 * SiFive PLIC (Platform Level Interrupt Controller)
 * SiFive Test (Test Finisher) for exiting simulation
 * SiFive UART, PRCI, AON, PWM, QSPI support is partially implemented
 * VirtIO MMIO (GPEX PCI support will be added in a future patch)
 * Generic 16550A UART emulation using 'hw/char/serial.c'
 * MTTCG and SMP support (PLIC and CLINT) on the 'virt' machine
 
 The RISC-V QEMU full system emulator supports 5 machines:
 
 * 'spike_v1.9.1', CLINT, PLIC, HTIF console, config-string, Priv v1.9.1
 * 'spike_v1.10', CLINT, PLIC, HTIF console, device-tree, Priv v1.10
 * 'sifive_e', CLINT, PLIC, SiFive UART, HiFive1 compat, Priv v1.10
 * 'sifive_u', CLINT, PLIC, SiFive UART, device-tree, Priv v1.10
 * 'virt', CLINT, PLIC, 16550A UART, VirtIO, device-tree, Priv v1.10
 
 This is a list of RISC-V QEMU Port Contributors:
 
 * Alex Suykov
 * Andreas Schwab
 * Antony Pavlov
 * Bastian Koppelmann
 * Bruce Hoult
 * Chih-Min Chao
 * Daire McNamara
 * Darius Rad
 * David Abdurachmanov
 * Hesham Almatary
 * Ivan Griffin
 * Jim Wilson
 * Kito Cheng
 * Michael Clark
 * Palmer Dabbelt
 * Richard Henderson
 * Sagar Karandikar
 * Shea Levy
 * Stefan O'Rear
 
 Notes:
 
 * contributor email addresses available off-list on request.
 * checkpatch has been run on all 23 patches.
 * checkpatch exceptions are noted in patches that have errors.
 * passes "make check" on full build for all targets
 * tested riscv-linux-4.6.2 on 'spike_v1.9.1' machine
 * tested riscv-linux-4.15 on 'spike_v1.10' and 'virt' machines
 * tested SiFive HiFive1 binaries in 'sifive_e' machine
 * tested RV64 on 32-bit i386
 
 This patch series includes the following patches:
 -----BEGIN PGP SIGNATURE-----
 
 iF0EABECAB0WIQR8mZMOsXzYugc9Xvpr8dezV+8+TwUCWqGRpAAKCRBr8dezV+8+
 T2mMAJ9ptK/7Bs3lE+Mki/ymlTPqhXtyxACfZkyfQf1mfhcXnB+oTG1RvEtblY8=
 =TJc8
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/riscv/tags/riscv-qemu-upstream-v8.2' into staging

QEMU RISC-V Emulation Support (RV64GC, RV32GC)

This release renames the SiFive machines to sifive_e and sifive_u
to represent the SiFive Everywhere and SiFive Unleashed platforms.
SiFive has configurable soft-core IP, so it is intended that these
machines will be extended to enable a variety of SiFive IP blocks.
The CPU definition infrastructure has been improved and there are
now vendor CPU modules including the SiFiVe E31, E51, U34 and U54
cores. The emulation accuracy for the E series has been improved
by disabling the MMU for the E series. S mode has been disabled on
cores that only support M mode and U mode. The two Spike machines
that support two privileged ISA versions have been coalesced into
one file. This series has Signed-off-by from the core contributors.

*** Known Issues ***

* Disassembler has some checkpatch warnings for the sake of code brevity
* scripts/qemu-binfmt-conf.sh has checkpatch warnings due to line length
* PMP (Physical Memory Protection) is as-of-yet unused and needs testing

*** Changelog ***

v8.2

* Rebase

v8.1

* Fix missed case of renaming spike_v1.9 to spike_v1.9.1

v8

* Added linux-user/riscv/target_elf.h during rebase
* Make resetvec configurable and clear mpp and mie on reset
* Use SiFive E31, E51, U34 and U54 cores in SiFive machines
* Define SiFive E31, E51, U34 and U54 cores
* Refactor CPU core definition in preparation for vendor cores
* Prevent S or U mode unless S or U extensions are present
* SiFive E Series cores have no MMU
* SiFive E Series cores have U mode
* Make privileged ISA v1.10 implicit in CPU types
* Remove DRAM_BASE and EXT_IO_BASE as they vary by machine
* Correctly handle mtvec and stvec alignment with respect to RVC
* Print more machine mode state in riscv_cpu_dump_state
* Make riscv_isa_string use compact extension order method
* Fix bug introduced in v6 RISCV_CPU_TYPE_NAME macro change
* Parameterize spike v1.9.1 config string
* Coalesce spike_v1.9.1 and spike_v1.10 machines
* Rename sifive_e300 to sifive_e, and sifive_u500 to sifive_u

v7

* Make spike_v1.10 the default machine
* Rename spike_v1.9 to spike_v1.9.1 to match privileged spec version
* Remove empty target/riscv/trace-events file
* Monitor ROM 32-bit reset code needs to be target endian
* Add TARGET_TIOCGPTPEER to linux-user/riscv/termbits.h
* Add -initrd support to the virt board
* Fix naming in spike machine interface header
* Update copyright notice on RISC-V Spike machines
* Update copyright notice on RISC-V HTIF Console device
* Change CPU Core and translator to GPLv2+
* Change RISC-V Disassembler to GPLv2+
* Change SiFive Test Finisher to GPLv2+
* Change SiFive CLINT to GPLv2+
* Change SiFive PRCI to GPLv2+
* Change SiFive PLIC to GPLv2+
* Change RISC-V spike machines to GPLv2+
* Change RISC-V virt machine to GPLv2+
* Change SiFive E300 machine to GPLv2+
* Change SiFive U500 machine to GPLv2+
* Change RISC-V Hart Array to GPLv2+
* Change RISC-V HTIF device to GPLv2+
* Change SiFiveUART device to GPLv2+

v6

* Drop IEEE 754-201x minimumNumber/maximumNumber for fmin/fmax
* Remove some unnecessary commented debug statements
* Change RISCV_CPU_TYPE_NAME to use riscv-cpu suffix
* Define all CPU variants for linux-user
* qemu_log calls require trailing \n
* Replace PLIC printfs with qemu_log
* Tear out unused HTIF code and eliminate shouting debug messages
* Fix illegal instruction when sfence.vma is passed (rs2) arguments
* Make updates to PTE accessed and dirty bits atomic
* Only require atomic PTE updates on MTTCG enabled guests
* Page fault if accessed or dirty bits can't be updated
* Fix get_physical_address PTE reads and writes on riscv32
* Remove erroneous comments from the PLIC
* Default enable MTTCG
* Make WFI less conservative
* Unify local interrupt handling
* Expunge HTIF interrupts
* Always access mstatus.mip under a lock
* Don't implement rdtime/rdtimeh in system mode (bbl emulates them)
* Implement insreth/cycleh for rv32 and always enable user-mode counters
* Add GDB stub support for reading and writing CSRs
* Rename ENABLE_CHARDEV #ifdef from HTIF code
* Replace bad HTIF ELF code with load_elf symbol callback
* Convert chained if else fault handlers to switch statements
* Use RISCV exception codes for linux-user page faults

v5

* Implement NaN-boxing for flw, set high order bits to 1
* Use float_muladd_negate_* flags to floatXX_muladd
* Use IEEE 754-201x minimumNumber/maximumNumber for fmin/fmax
* Fix TARGET_NR_syscalls
* Update linux-user/riscv/syscall_nr.h
* Fix FENCE.I, needs to terminate translation block
* Adjust unusual convention for interruptno >= 0

v4

* Add @riscv: since 2.12 to CpuInfoArch
* Remove misleading little-endian comment from load_kernel
* Rename cpu-model property to cpu-type
* Drop some unnecessary inline function attributes
* Don't allow GDB to set value of x0 register
* Remove unnecessary empty property lists
* Add Test Finisher device to implement poweroff in virt machine
* Implement priv ISA v1.10 trap and sret/mret xPIE/xIE behavior
* Store fflags data in fp_status
* Purge runtime users of helper_raise_exception
* Fix validate_csr
* Tidy gen_jalr
* Tidy immediate shifts
* Add gen_exception_inst_addr_mis
* Add gen_exception_debug
* Add gen_exception_illegal
* Tidy helper_fclass_*
* Split rounding mode setting to a new function
* Enforce MSTATUS_FS via TB flags
* Implement acquire/release barrier semantics
* Use atomic operations as required
* Fix FENCE and FENCE_I
* Remove commented code from spike machines
* PAGE_WRITE permissions can be set on loads if page is already dirty
* The result of format conversion on an NaN must be a quiet NaN
* Add missing process_queued_cpu_work to riscv linux-user
* Remove float(32|64)_classify from cpu.h
* Removed nonsensical unions aliasing the same type
* Use uintN_t instead of uintN_fast_t in fpu_helper.c
* Use macros for FPU exception values in softfloat_flags_to_riscv
* Move code to set round mode into set_fp_round_mode function
* Convert set_fp_exceptions from a macro to an inline function
* Convert round mode helper into an inline function
* Make fpu_helper ieee_rm array static const
* Include cpu_mmu_index in cpu_get_tb_cpu_state flags
* Eliminate MPRV influence on mmu_index
* Remove unrecoverable do_unassigned_access function
* Only update PTE accessed and dirty bits if necessary
* Remove unnecessary tlb_flush in set_mode as mode is in mmu_idx
* Remove buggy support for misa writes. misa writes are optional
  and are not implemented in any known hardware
* Always set PTE read or execute permissions during page walk
* Reorder helper function declarations to match order in helper.c
* Remove redundant variable declaration in get_physical_address
* Remove duplicated code from get_physical_address
* Use mmu_idx instead of mem_idx in riscv_cpu_get_phys_page_debug

v3

* Fix indentation in PMP and HTIF debug macros
* Fix disassembler checkpatch open brace '{' on next line errors
* Fix trailing statements on next line in decode_inst_decompress
* NOTE: the other checkpatch issues have been reviewed previously

v2

* Remove redundant NULL terminators from disassembler register arrays
* Change disassembler register name arrays to const
* Refine disassembler internal function names
* Update dates in disassembler copyright message
* Remove #ifdef CONFIG_USER_ONLY version of cpu_has_work
* Use ULL suffix on 64-bit constants
* Move riscv_cpu_mmu_index from cpu.h to helper.c
* Move riscv_cpu_hw_interrupts_pending from cpu.h to helper.c
* Remove redundant TARGET_HAS_ICE from cpu.h
* Use qemu_irq instead of void* for irq definition in cpu.h
* Remove duplicate typedef from struct CPURISCVState
* Remove redundant g_strdup from cpu_register
* Remove redundant tlb_flush from riscv_cpu_reset
* Remove redundant mode calculation from get_physical_address
* Remove redundant debug mode printf and dcsr comment
* Remove redundant clearing of MSB for bare physical addresses
* Use g_assert_not_reached for invalid mode in get_physical_address
* Use g_assert_not_reached for unreachable checks in get_physical_address
* Use g_assert_not_reached for unreachable type in raise_mmu_exception
* Return exception instead of aborting for misaligned fetches
* Move exception defines from cpu.h to cpu_bits.h
* Remove redundant breakpoint control definitions from cpu_bits.h
* Implement riscv_cpu_unassigned_access exception handling
* Log and raise exceptions for unimplemented CSRs
* Match Spike HTIF exit behavior - don’t print TEST-PASSED
* Make frm,fflags,fcsr writes trap when mstatus.FS is clear
* Use g_assert_not_reached for unreachable invalid mode
* Make hret,uret,dret generate illegal instructions
* Move riscv_cpu_dump_state and int/fpr regnames to cpu.c
* Lift interrupt flag and mask into constants in cpu_bits.h
* Change trap debugging to use qemu_log_mask LOG_TRACE
* Change CSR debugging to use qemu_log_mask LOG_TRACE
* Change PMP debugging to use qemu_log_mask LOG_TRACE
* Remove commented code from pmp.c
* Change CpuInfoRISCV qapi schema docs to Since 2.12
* Change RV feature macro to use target_ulong cast
* Remove riscv_feature and instead use misa extension flags
* Make riscv_flush_icache_syscall a no-op
* Undo checkpatch whitespace fixes in unrelated linux-user code
* Remove redudant constants and tidy up cpu_bits.h
* Make helper_fence_i a no-op
* Move include "exec/cpu-all" to end of cpu.h
* Rename set_privilege to riscv_set_mode
* Move redundant forward declaration for cpu_riscv_translate_address
* Remove TCGV_UNUSED from riscv_translate_init
* Add comment to pmp.c stating the code is untested and currently unused
* Use ctz to simplify decoding of PMP NAPOT address ranges
* Change pmp_is_in_range to use than equal for end addresses
* Fix off by one error in pmp_update_rule
* Rearrange PMP_DEBUG so that formatting is compile-time checked
* Rearrange trap debugging so that formatting is compile-time checked
* Rearrange PLIC debugging so that formatting is compile-time checked
* Use qemu_log/qemu_log_mask for HTIF logging and debugging
* Move exception and interrupt names into cpu.c
* Add Palmer Dabbelt as a RISC-V Maintainer
* Rebase against current qemu master branch

v1

* initial version based on forward port from riscv-qemu repository

*** Background ***

"RISC-V is an open, free ISA enabling a new era of processor innovation
through open standard collaboration. Born in academia and research,
RISC-V ISA delivers a new level of free, extensible software and
hardware freedom on architecture, paving the way for the next 50 years
of computing design and innovation."

The QEMU RISC-V port has been developed and maintained out-of-tree for
several years by Sagar Karandikar and Bastian Koppelmann. The RISC-V
Privileged specification has evolved substantially over this period but
has recently been solidifying. The RISC-V Base ISA has been frozon for
some time and the Privileged ISA, GCC toolchain and Linux ABI are now
quite stable. I have recently joined Sagar and Bastian as a RISC-V QEMU
Maintainer and hope to support upstreaming the port.

There are multiple vendors taping out, preparing to ship, or shipping
silicon that implements the RISC-V Privileged ISA Version 1.10. There
are also several RISC-V Soft-IP cores implementing Privileged ISA
Version 1.10 that run on FPGA such as SiFive's Freedom U500 Platform
and the U54‑MC RISC-V Core IP, among many more implementations from a
variety of vendors. See https://riscv.org/ for more details.

RISC-V support was upstreamed in binutils 2.28 and GCC 7.1 in the first
half of 2016. RISC-V support is now available in LLVM top-of-tree and
the RISC-V Linux port was accepted into Linux 4.15-rc1 late last year
and is available in the Linux 4.15 release. GLIBC 2.27 added support
for the RISC-V ISA running on Linux (requires at least binutils-2.30,
gcc-7.3.0, and linux-4.15). We believe it is timely to submit the
RISC-V QEMU port for upstream review with the goal of incorporating
RISC-V support into the upcoming QEMU 2.12 release.

The RISC-V QEMU port is still under active development, mostly with
respect to device emulation, the addition of Hypervisor support as
specified in the RISC-V Draft Privileged ISA Version 1.11, and Vector
support once the first draft is finalized later this year. We believe
now is the appropriate time for RISC-V QEMU development to be carried
out in the main QEMU repository as the code will benefit from more
rigorous review. The RISC-V QEMU port currently supports all the ISA
extensions that have been finalized and frozen in the Base ISA.

Blog post about recent additions to RISC-V QEMU: https://goo.gl/fJ4zgk

The RISC-V QEMU wiki: https://github.com/riscv/riscv-qemu/wiki

Instructions for building a busybox+dropbear root image, BBL (Berkeley
Boot Loader) and linux kernel image for use with the RISC-V QEMU
'virt' machine: https://github.com/michaeljclark/busybear-linux

*** Overview ***

The RISC-V QEMU port implements the following specifications:

* RISC-V Instruction Set Manual Volume I: User-Level ISA Version 2.2
* RISC-V Instruction Set Manual Volume II: Privileged ISA Version 1.9.1
* RISC-V Instruction Set Manual Volume II: Privileged ISA Version 1.10

The RISC-V QEMU port supports the following instruction set extensions:

* RV32GC with Supervisor-mode and User-mode (RV32IMAFDCSU)
* RV64GC with Supervisor-mode and User-mode (RV64IMAFDCSU)

The RISC-V QEMU port adds the following targets to QEMU:

* riscv32-softmmu
* riscv64-softmmu
* riscv32-linux-user
* riscv64-linux-user

The RISC-V QEMU port supports the following hardware:

* HTIF Console (Host Target Interface)
* SiFive CLINT (Core Local Interruptor) for Timer interrupts and IPIs
* SiFive PLIC (Platform Level Interrupt Controller)
* SiFive Test (Test Finisher) for exiting simulation
* SiFive UART, PRCI, AON, PWM, QSPI support is partially implemented
* VirtIO MMIO (GPEX PCI support will be added in a future patch)
* Generic 16550A UART emulation using 'hw/char/serial.c'
* MTTCG and SMP support (PLIC and CLINT) on the 'virt' machine

The RISC-V QEMU full system emulator supports 5 machines:

* 'spike_v1.9.1', CLINT, PLIC, HTIF console, config-string, Priv v1.9.1
* 'spike_v1.10', CLINT, PLIC, HTIF console, device-tree, Priv v1.10
* 'sifive_e', CLINT, PLIC, SiFive UART, HiFive1 compat, Priv v1.10
* 'sifive_u', CLINT, PLIC, SiFive UART, device-tree, Priv v1.10
* 'virt', CLINT, PLIC, 16550A UART, VirtIO, device-tree, Priv v1.10

This is a list of RISC-V QEMU Port Contributors:

* Alex Suykov
* Andreas Schwab
* Antony Pavlov
* Bastian Koppelmann
* Bruce Hoult
* Chih-Min Chao
* Daire McNamara
* Darius Rad
* David Abdurachmanov
* Hesham Almatary
* Ivan Griffin
* Jim Wilson
* Kito Cheng
* Michael Clark
* Palmer Dabbelt
* Richard Henderson
* Sagar Karandikar
* Shea Levy
* Stefan O'Rear

Notes:

* contributor email addresses available off-list on request.
* checkpatch has been run on all 23 patches.
* checkpatch exceptions are noted in patches that have errors.
* passes "make check" on full build for all targets
* tested riscv-linux-4.6.2 on 'spike_v1.9.1' machine
* tested riscv-linux-4.15 on 'spike_v1.10' and 'virt' machines
* tested SiFive HiFive1 binaries in 'sifive_e' machine
* tested RV64 on 32-bit i386

This patch series includes the following patches:

# gpg: Signature made Thu 08 Mar 2018 19:40:20 GMT
# gpg:                using DSA key 6BF1D7B357EF3E4F
# gpg: Good signature from "Michael Clark <michaeljclark@mac.com>"
# gpg:                 aka "Michael Clark <mjc@sifive.com>"
# gpg:                 aka "Michael Clark <michael@metaparadigm.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 7C99 930E B17C D8BA 073D  5EFA 6BF1 D7B3 57EF 3E4F

* remotes/riscv/tags/riscv-qemu-upstream-v8.2: (23 commits)
  RISC-V Build Infrastructure
  SiFive Freedom U Series RISC-V Machine
  SiFive Freedom E Series RISC-V Machine
  SiFive RISC-V PRCI Block
  SiFive RISC-V UART Device
  RISC-V VirtIO Machine
  SiFive RISC-V Test Finisher
  RISC-V Spike Machines
  SiFive RISC-V PLIC Block
  SiFive RISC-V CLINT Block
  RISC-V HART Array
  RISC-V HTIF Console
  Add symbol table callback interface to load_elf
  RISC-V Linux User Emulation
  RISC-V Physical Memory Protection
  RISC-V TCG Code Generation
  RISC-V GDB Stub
  RISC-V FPU Support
  RISC-V CPU Helpers
  RISC-V Disassembler
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-03-09 10:58:57 +00:00
commit d9bbfea646
69 changed files with 13310 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
MAINTAINERS
View File

@ -233,6 +233,17 @@ F: hw/ppc/
F: include/hw/ppc/
F: disas/ppc.c
RISC-V
M: Michael Clark <mjc@sifive.com>
M: Palmer Dabbelt <palmer@sifive.com>
M: Sagar Karandikar <sagark@eecs.berkeley.edu>
M: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
S: Maintained
F: target/riscv/
F: hw/riscv/
F: include/hw/riscv/
F: disas/riscv.c
S390
M: Richard Henderson <rth@twiddle.net>
M: Alexander Graf <agraf@suse.de>

2
arch_init.c
View File

@ -71,6 +71,8 @@ int graphic_depth = 32;
#define QEMU_ARCH QEMU_ARCH_OPENRISC
#elif defined(TARGET_PPC)
#define QEMU_ARCH QEMU_ARCH_PPC
#elif defined(TARGET_RISCV)
#define QEMU_ARCH QEMU_ARCH_RISCV
#elif defined(TARGET_S390X)
#define QEMU_ARCH QEMU_ARCH_S390X
#elif defined(TARGET_SH4)

13
configure vendored
View File

@ -6797,6 +6797,16 @@ case "$target_name" in
echo "TARGET_ABI32=y" >> $config_target_mak
gdb_xml_files="power64-core.xml power-fpu.xml power-altivec.xml power-spe.xml power-vsx.xml"
;;
riscv32)
TARGET_BASE_ARCH=riscv
TARGET_ABI_DIR=riscv
mttcg=yes
;;
riscv64)
TARGET_BASE_ARCH=riscv
TARGET_ABI_DIR=riscv
mttcg=yes
;;
sh4|sh4eb)
TARGET_ARCH=sh4
bflt="yes"
@ -6966,6 +6976,9 @@ for i in $ARCH $TARGET_BASE_ARCH ; do
ppc*)
disas_config "PPC"
;;
riscv)
disas_config "RISCV"
;;
s390*)
disas_config "S390"
;;

6
cpus.c
View File

@ -2081,6 +2081,9 @@ CpuInfoList *qmp_query_cpus(Error **errp)
#elif defined(TARGET_SPARC)
SPARCCPU *sparc_cpu = SPARC_CPU(cpu);
CPUSPARCState *env = &sparc_cpu->env;
#elif defined(TARGET_RISCV)
RISCVCPU *riscv_cpu = RISCV_CPU(cpu);
CPURISCVState *env = &riscv_cpu->env;
#elif defined(TARGET_MIPS)
MIPSCPU *mips_cpu = MIPS_CPU(cpu);
CPUMIPSState *env = &mips_cpu->env;
@ -2120,6 +2123,9 @@ CpuInfoList *qmp_query_cpus(Error **errp)
#elif defined(TARGET_S390X)
info->value->arch = CPU_INFO_ARCH_S390;
info->value->u.s390.cpu_state = env->cpu_state;
#elif defined(TARGET_RISCV)
info->value->arch = CPU_INFO_ARCH_RISCV;
info->value->u.riscv.pc = env->pc;
#else
info->value->arch = CPU_INFO_ARCH_OTHER;
#endif

1
default-configs/riscv32-linux-user.mak Normal file
View File

@ -0,0 +1 @@
# Default configuration for riscv-linux-user

4
default-configs/riscv32-softmmu.mak Normal file
View File

@ -0,0 +1,4 @@
# Default configuration for riscv-softmmu
CONFIG_SERIAL=y
CONFIG_VIRTIO=y

1
default-configs/riscv64-linux-user.mak Normal file
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@ -0,0 +1 @@
# Default configuration for riscv-linux-user

4
default-configs/riscv64-softmmu.mak Normal file
View File

@ -0,0 +1,4 @@
# Default configuration for riscv-softmmu
CONFIG_SERIAL=y
CONFIG_VIRTIO=y

2
disas.c
View File

@ -522,6 +522,8 @@ void disas(FILE *out, void *code, unsigned long size)
# ifdef _ARCH_PPC64
s.info.cap_mode = CS_MODE_64;
# endif
#elif defined(__riscv__)
print_insn = print_insn_riscv;
#elif defined(__aarch64__) && defined(CONFIG_ARM_A64_DIS)
print_insn = print_insn_arm_a64;
s.info.cap_arch = CS_ARCH_ARM64;

1
disas/Makefile.objs
View File

@ -17,6 +17,7 @@ common-obj-$(CONFIG_MIPS_DIS) += mips.o
common-obj-$(CONFIG_NIOS2_DIS) += nios2.o
common-obj-$(CONFIG_MOXIE_DIS) += moxie.o
common-obj-$(CONFIG_PPC_DIS) += ppc.o
common-obj-$(CONFIG_RISCV_DIS) += riscv.o
common-obj-$(CONFIG_S390_DIS) += s390.o
common-obj-$(CONFIG_SH4_DIS) += sh4.o
common-obj-$(CONFIG_SPARC_DIS) += sparc.o

3048
disas/riscv.c Normal file
View File

File diff suppressed because it is too large Load Diff

7
fpu/softfloat-specialize.h
View File

@ -114,7 +114,8 @@ float32 float32_default_nan(float_status *status)
#if defined(TARGET_SPARC) || defined(TARGET_M68K)
return const_float32(0x7FFFFFFF);
#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) || \
defined(TARGET_XTENSA) || defined(TARGET_S390X) || defined(TARGET_TRICORE)
defined(TARGET_XTENSA) || defined(TARGET_S390X) || \
defined(TARGET_TRICORE) || defined(TARGET_RISCV)
return const_float32(0x7FC00000);
#elif defined(TARGET_HPPA)
return const_float32(0x7FA00000);
@ -139,7 +140,7 @@ float64 float64_default_nan(float_status *status)
#if defined(TARGET_SPARC) || defined(TARGET_M68K)
return const_float64(LIT64(0x7FFFFFFFFFFFFFFF));
#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) || \
defined(TARGET_S390X)
defined(TARGET_S390X) || defined(TARGET_RISCV)
return const_float64(LIT64(0x7FF8000000000000));
#elif defined(TARGET_HPPA)
return const_float64(LIT64(0x7FF4000000000000));
@ -203,7 +204,7 @@ float128 float128_default_nan(float_status *status)
r.high = LIT64(0x7FFF7FFFFFFFFFFF);
} else {
r.low = LIT64(0x0000000000000000);
#if defined(TARGET_S390X) || defined(TARGET_PPC)
#if defined(TARGET_S390X) || defined(TARGET_PPC) || defined(TARGET_RISCV)
r.high = LIT64(0x7FFF800000000000);
#else
r.high = LIT64(0xFFFF800000000000);

18
hw/core/loader.c
View File

@ -449,6 +449,20 @@ int load_elf_ram(const char *filename,
uint64_t *highaddr, int big_endian, int elf_machine,
int clear_lsb, int data_swab, AddressSpace *as,
bool load_rom)
{
return load_elf_ram_sym(filename, translate_fn, translate_opaque,
pentry, lowaddr, highaddr, big_endian,
elf_machine, clear_lsb, data_swab, as,
load_rom, NULL);
}
/* return < 0 if error, otherwise the number of bytes loaded in memory */
int load_elf_ram_sym(const char *filename,
uint64_t (*translate_fn)(void *, uint64_t),
void *translate_opaque, uint64_t *pentry,
uint64_t *lowaddr, uint64_t *highaddr, int big_endian,
int elf_machine, int clear_lsb, int data_swab,
AddressSpace *as, bool load_rom, symbol_fn_t sym_cb)
{
int fd, data_order, target_data_order, must_swab, ret = ELF_LOAD_FAILED;
uint8_t e_ident[EI_NIDENT];
@ -488,11 +502,11 @@ int load_elf_ram(const char *filename,
if (e_ident[EI_CLASS] == ELFCLASS64) {
ret = load_elf64(filename, fd, translate_fn, translate_opaque, must_swab,
pentry, lowaddr, highaddr, elf_machine, clear_lsb,
data_swab, as, load_rom);
data_swab, as, load_rom, sym_cb);
} else {
ret = load_elf32(filename, fd, translate_fn, translate_opaque, must_swab,
pentry, lowaddr, highaddr, elf_machine, clear_lsb,
data_swab, as, load_rom);
data_swab, as, load_rom, sym_cb);
}
fail:

11
hw/riscv/Makefile.objs Normal file
View File

@ -0,0 +1,11 @@
obj-y += riscv_htif.o
obj-y += riscv_hart.o
obj-y += sifive_e.o
obj-y += sifive_clint.o
obj-y += sifive_prci.o
obj-y += sifive_plic.o
obj-y += sifive_test.o
obj-y += sifive_u.o
obj-y += sifive_uart.o
obj-y += spike.o
obj-y += virt.o

89
hw/riscv/riscv_hart.c Normal file
View File

@ -0,0 +1,89 @@
/*
* QEMU RISCV Hart Array
*
* Copyright (c) 2017 SiFive, Inc.
*
* Holds the state of a heterogenous array of RISC-V harts
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/sysbus.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/riscv_hart.h"
static Property riscv_harts_props[] = {
DEFINE_PROP_UINT32("num-harts", RISCVHartArrayState, num_harts, 1),
DEFINE_PROP_STRING("cpu-type", RISCVHartArrayState, cpu_type),
DEFINE_PROP_END_OF_LIST(),
};
static void riscv_harts_cpu_reset(void *opaque)
{
RISCVCPU *cpu = opaque;
cpu_reset(CPU(cpu));
}
static void riscv_harts_realize(DeviceState *dev, Error **errp)
{
RISCVHartArrayState *s = RISCV_HART_ARRAY(dev);
Error *err = NULL;
int n;
s->harts = g_new0(RISCVCPU, s->num_harts);
for (n = 0; n < s->num_harts; n++) {
object_initialize(&s->harts[n], sizeof(RISCVCPU), s->cpu_type);
s->harts[n].env.mhartid = n;
object_property_add_child(OBJECT(s), "harts[*]", OBJECT(&s->harts[n]),
&error_abort);
qemu_register_reset(riscv_harts_cpu_reset, &s->harts[n]);
object_property_set_bool(OBJECT(&s->harts[n]), true,
"realized", &err);
if (err) {
error_propagate(errp, err);
return;
}
}
}
static void riscv_harts_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->props = riscv_harts_props;
dc->realize = riscv_harts_realize;
}
static void riscv_harts_init(Object *obj)
{
/* RISCVHartArrayState *s = SIFIVE_COREPLEX(obj); */
}
static const TypeInfo riscv_harts_info = {
.name = TYPE_RISCV_HART_ARRAY,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(RISCVHartArrayState),
.instance_init = riscv_harts_init,
.class_init = riscv_harts_class_init,
};
static void riscv_harts_register_types(void)
{
type_register_static(&riscv_harts_info);
}
type_init(riscv_harts_register_types)

258
hw/riscv/riscv_htif.c Normal file
View File

@ -0,0 +1,258 @@
/*
* QEMU RISC-V Host Target Interface (HTIF) Emulation
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017-2018 SiFive, Inc.
*
* This provides HTIF device emulation for QEMU. At the moment this allows
* for identical copies of bbl/linux to run on both spike and QEMU.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/log.h"
#include "hw/sysbus.h"
#include "hw/char/serial.h"
#include "chardev/char.h"
#include "chardev/char-fe.h"
#include "hw/riscv/riscv_htif.h"
#include "qemu/timer.h"
#include "exec/address-spaces.h"
#include "qemu/error-report.h"
#define RISCV_DEBUG_HTIF 0
#define HTIF_DEBUG(fmt, ...) \
do { \
if (RISCV_DEBUG_HTIF) { \
qemu_log_mask(LOG_TRACE, "%s: " fmt "\n", __func__, ##__VA_ARGS__);\
} \
} while (0)
static uint64_t fromhost_addr, tohost_addr;
void htif_symbol_callback(const char *st_name, int st_info, uint64_t st_value,
uint64_t st_size)
{
if (strcmp("fromhost", st_name) == 0) {
fromhost_addr = st_value;
if (st_size != 8) {
error_report("HTIF fromhost must be 8 bytes");
exit(1);
}
} else if (strcmp("tohost", st_name) == 0) {
tohost_addr = st_value;
if (st_size != 8) {
error_report("HTIF tohost must be 8 bytes");
exit(1);
}
}
}
/*
* Called by the char dev to see if HTIF is ready to accept input.
*/
static int htif_can_recv(void *opaque)
{
return 1;
}
/*
* Called by the char dev to supply input to HTIF console.
* We assume that we will receive one character at a time.
*/
static void htif_recv(void *opaque, const uint8_t *buf, int size)
{
HTIFState *htifstate = opaque;
if (size != 1) {
return;
}
/* TODO - we need to check whether mfromhost is zero which indicates
the device is ready to receive. The current implementation
will drop characters */
uint64_t val_written = htifstate->pending_read;
uint64_t resp = 0x100 | *buf;
htifstate->env->mfromhost = (val_written >> 48 << 48) | (resp << 16 >> 16);
}
/*
* Called by the char dev to supply special events to the HTIF console.
* Not used for HTIF.
*/
static void htif_event(void *opaque, int event)
{
}
static int htif_be_change(void *opaque)
{
HTIFState *s = opaque;
qemu_chr_fe_set_handlers(&s->chr, htif_can_recv, htif_recv, htif_event,
htif_be_change, s, NULL, true);
return 0;
}
static void htif_handle_tohost_write(HTIFState *htifstate, uint64_t val_written)
{
uint8_t device = val_written >> 56;
uint8_t cmd = val_written >> 48;
uint64_t payload = val_written & 0xFFFFFFFFFFFFULL;
int resp = 0;
HTIF_DEBUG("mtohost write: device: %d cmd: %d what: %02" PRIx64
" -payload: %016" PRIx64 "\n", device, cmd, payload & 0xFF, payload);
/*
* Currently, there is a fixed mapping of devices:
* 0: riscv-tests Pass/Fail Reporting Only (no syscall proxy)
* 1: Console
*/
if (unlikely(device == 0x0)) {
/* frontend syscall handler, shutdown and exit code support */
if (cmd == 0x0) {
if (payload & 0x1) {
/* exit code */
int exit_code = payload >> 1;
exit(exit_code);
} else {
qemu_log_mask(LOG_UNIMP, "pk syscall proxy not supported\n");
}
} else {
qemu_log("HTIF device %d: unknown command\n", device);
}
} else if (likely(device == 0x1)) {
/* HTIF Console */
if (cmd == 0x0) {
/* this should be a queue, but not yet implemented as such */
htifstate->pending_read = val_written;
htifstate->env->mtohost = 0; /* clear to indicate we read */
return;
} else if (cmd == 0x1) {
qemu_chr_fe_write(&htifstate->chr, (uint8_t *)&payload, 1);
resp = 0x100 | (uint8_t)payload;
} else {
qemu_log("HTIF device %d: unknown command\n", device);
}
} else {
qemu_log("HTIF unknown device or command\n");
HTIF_DEBUG("device: %d cmd: %d what: %02" PRIx64
" payload: %016" PRIx64, device, cmd, payload & 0xFF, payload);
}
/*
* - latest bbl does not set fromhost to 0 if there is a value in tohost
* - with this code enabled, qemu hangs waiting for fromhost to go to 0
* - with this code disabled, qemu works with bbl priv v1.9.1 and v1.10
* - HTIF needs protocol documentation and a more complete state machine
while (!htifstate->fromhost_inprogress &&
htifstate->env->mfromhost != 0x0) {
}
*/
htifstate->env->mfromhost = (val_written >> 48 << 48) | (resp << 16 >> 16);
htifstate->env->mtohost = 0; /* clear to indicate we read */
}
#define TOHOST_OFFSET1 (htifstate->tohost_offset)
#define TOHOST_OFFSET2 (htifstate->tohost_offset + 4)
#define FROMHOST_OFFSET1 (htifstate->fromhost_offset)
#define FROMHOST_OFFSET2 (htifstate->fromhost_offset + 4)
/* CPU wants to read an HTIF register */
static uint64_t htif_mm_read(void *opaque, hwaddr addr, unsigned size)
{
HTIFState *htifstate = opaque;
if (addr == TOHOST_OFFSET1) {
return htifstate->env->mtohost & 0xFFFFFFFF;
} else if (addr == TOHOST_OFFSET2) {
return (htifstate->env->mtohost >> 32) & 0xFFFFFFFF;
} else if (addr == FROMHOST_OFFSET1) {
return htifstate->env->mfromhost & 0xFFFFFFFF;
} else if (addr == FROMHOST_OFFSET2) {
return (htifstate->env->mfromhost >> 32) & 0xFFFFFFFF;
} else {
qemu_log("Invalid htif read: address %016" PRIx64 "\n",
(uint64_t)addr);
return 0;
}
}
/* CPU wrote to an HTIF register */
static void htif_mm_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
HTIFState *htifstate = opaque;
if (addr == TOHOST_OFFSET1) {
if (htifstate->env->mtohost == 0x0) {
htifstate->allow_tohost = 1;
htifstate->env->mtohost = value & 0xFFFFFFFF;
} else {
htifstate->allow_tohost = 0;
}
} else if (addr == TOHOST_OFFSET2) {
if (htifstate->allow_tohost) {
htifstate->env->mtohost |= value << 32;
htif_handle_tohost_write(htifstate, htifstate->env->mtohost);
}
} else if (addr == FROMHOST_OFFSET1) {
htifstate->fromhost_inprogress = 1;
htifstate->env->mfromhost = value & 0xFFFFFFFF;
} else if (addr == FROMHOST_OFFSET2) {
htifstate->env->mfromhost |= value << 32;
htifstate->fromhost_inprogress = 0;
} else {
qemu_log("Invalid htif write: address %016" PRIx64 "\n",
(uint64_t)addr);
}
}
static const MemoryRegionOps htif_mm_ops = {
.read = htif_mm_read,
.write = htif_mm_write,
};
HTIFState *htif_mm_init(MemoryRegion *address_space, MemoryRegion *main_mem,
CPURISCVState *env, Chardev *chr)
{
uint64_t base = MIN(tohost_addr, fromhost_addr);
uint64_t size = MAX(tohost_addr + 8, fromhost_addr + 8) - base;
uint64_t tohost_offset = tohost_addr - base;
uint64_t fromhost_offset = fromhost_addr - base;
HTIFState *s = g_malloc0(sizeof(HTIFState));
s->address_space = address_space;
s->main_mem = main_mem;
s->main_mem_ram_ptr = memory_region_get_ram_ptr(main_mem);
s->env = env;
s->tohost_offset = tohost_offset;
s->fromhost_offset = fromhost_offset;
s->pending_read = 0;
s->allow_tohost = 0;
s->fromhost_inprogress = 0;
qemu_chr_fe_init(&s->chr, chr, &error_abort);
qemu_chr_fe_set_handlers(&s->chr, htif_can_recv, htif_recv, htif_event,
htif_be_change, s, NULL, true);
if (base) {
memory_region_init_io(&s->mmio, NULL, &htif_mm_ops, s,
TYPE_HTIF_UART, size);
memory_region_add_subregion(address_space, base, &s->mmio);
}
return s;
}

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/*
* SiFive CLINT (Core Local Interruptor)
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017 SiFive, Inc.
*
* This provides real-time clock, timer and interprocessor interrupts.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "hw/sysbus.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/sifive_clint.h"
#include "qemu/timer.h"
/* See: riscv-pk/machine/sbi_entry.S and arch/riscv/kernel/time.c */
#define TIMER_FREQ (10 * 1000 * 1000)
static uint64_t cpu_riscv_read_rtc(void)
{
return muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), TIMER_FREQ,
NANOSECONDS_PER_SECOND);
}
/*
* Called when timecmp is written to update the QEMU timer or immediately
* trigger timer interrupt if mtimecmp <= current timer value.
*/
static void sifive_clint_write_timecmp(RISCVCPU *cpu, uint64_t value)
{
uint64_t next;
uint64_t diff;
uint64_t rtc_r = cpu_riscv_read_rtc();
cpu->env.timecmp = value;
if (cpu->env.timecmp <= rtc_r) {
/* if we're setting an MTIMECMP value in the "past",
immediately raise the timer interrupt */
riscv_set_local_interrupt(cpu, MIP_MTIP, 1);
return;
}
/* otherwise, set up the future timer interrupt */
riscv_set_local_interrupt(cpu, MIP_MTIP, 0);
diff = cpu->env.timecmp - rtc_r;
/* back to ns (note args switched in muldiv64) */
next = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
muldiv64(diff, NANOSECONDS_PER_SECOND, TIMER_FREQ);
timer_mod(cpu->env.timer, next);
}
/*
* Callback used when the timer set using timer_mod expires.
* Should raise the timer interrupt line
*/
static void sifive_clint_timer_cb(void *opaque)
{
RISCVCPU *cpu = opaque;
riscv_set_local_interrupt(cpu, MIP_MTIP, 1);
}
/* CPU wants to read rtc or timecmp register */
static uint64_t sifive_clint_read(void *opaque, hwaddr addr, unsigned size)
{
SiFiveCLINTState *clint = opaque;
if (addr >= clint->sip_base &&
addr < clint->sip_base + (clint->num_harts << 2)) {
size_t hartid = (addr - clint->sip_base) >> 2;
CPUState *cpu = qemu_get_cpu(hartid);
CPURISCVState *env = cpu ? cpu->env_ptr : NULL;
if (!env) {
error_report("clint: invalid timecmp hartid: %zu", hartid);
} else if ((addr & 0x3) == 0) {
return (env->mip & MIP_MSIP) > 0;
} else {
error_report("clint: invalid read: %08x", (uint32_t)addr);
return 0;
}
} else if (addr >= clint->timecmp_base &&
addr < clint->timecmp_base + (clint->num_harts << 3)) {
size_t hartid = (addr - clint->timecmp_base) >> 3;
CPUState *cpu = qemu_get_cpu(hartid);
CPURISCVState *env = cpu ? cpu->env_ptr : NULL;
if (!env) {
error_report("clint: invalid timecmp hartid: %zu", hartid);
} else if ((addr & 0x7) == 0) {
/* timecmp_lo */
uint64_t timecmp = env->timecmp;
return timecmp & 0xFFFFFFFF;
} else if ((addr & 0x7) == 4) {
/* timecmp_hi */
uint64_t timecmp = env->timecmp;
return (timecmp >> 32) & 0xFFFFFFFF;
} else {
error_report("clint: invalid read: %08x", (uint32_t)addr);
return 0;
}
} else if (addr == clint->time_base) {
/* time_lo */
return cpu_riscv_read_rtc() & 0xFFFFFFFF;
} else if (addr == clint->time_base + 4) {
/* time_hi */
return (cpu_riscv_read_rtc() >> 32) & 0xFFFFFFFF;
}
error_report("clint: invalid read: %08x", (uint32_t)addr);
return 0;
}
/* CPU wrote to rtc or timecmp register */
static void sifive_clint_write(void *opaque, hwaddr addr, uint64_t value,
unsigned size)
{
SiFiveCLINTState *clint = opaque;
if (addr >= clint->sip_base &&
addr < clint->sip_base + (clint->num_harts << 2)) {
size_t hartid = (addr - clint->sip_base) >> 2;
CPUState *cpu = qemu_get_cpu(hartid);
CPURISCVState *env = cpu ? cpu->env_ptr : NULL;
if (!env) {
error_report("clint: invalid timecmp hartid: %zu", hartid);
} else if ((addr & 0x3) == 0) {
riscv_set_local_interrupt(RISCV_CPU(cpu), MIP_MSIP, value != 0);
} else {
error_report("clint: invalid sip write: %08x", (uint32_t)addr);
}
return;
} else if (addr >= clint->timecmp_base &&
addr < clint->timecmp_base + (clint->num_harts << 3)) {
size_t hartid = (addr - clint->timecmp_base) >> 3;
CPUState *cpu = qemu_get_cpu(hartid);
CPURISCVState *env = cpu ? cpu->env_ptr : NULL;
if (!env) {
error_report("clint: invalid timecmp hartid: %zu", hartid);
} else if ((addr & 0x7) == 0) {
/* timecmp_lo */
uint64_t timecmp = env->timecmp;
sifive_clint_write_timecmp(RISCV_CPU(cpu),
timecmp << 32 | (value & 0xFFFFFFFF));
return;
} else if ((addr & 0x7) == 4) {
/* timecmp_hi */
uint64_t timecmp = env->timecmp;
sifive_clint_write_timecmp(RISCV_CPU(cpu),
value << 32 | (timecmp & 0xFFFFFFFF));
} else {
error_report("clint: invalid timecmp write: %08x", (uint32_t)addr);
}
return;
} else if (addr == clint->time_base) {
/* time_lo */
error_report("clint: time_lo write not implemented");
return;
} else if (addr == clint->time_base + 4) {
/* time_hi */
error_report("clint: time_hi write not implemented");
return;
}
error_report("clint: invalid write: %08x", (uint32_t)addr);
}
static const MemoryRegionOps sifive_clint_ops = {
.read = sifive_clint_read,
.write = sifive_clint_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4
}
};
static Property sifive_clint_properties[] = {
DEFINE_PROP_UINT32("num-harts", SiFiveCLINTState, num_harts, 0),
DEFINE_PROP_UINT32("sip-base", SiFiveCLINTState, sip_base, 0),
DEFINE_PROP_UINT32("timecmp-base", SiFiveCLINTState, timecmp_base, 0),
DEFINE_PROP_UINT32("time-base", SiFiveCLINTState, time_base, 0),
DEFINE_PROP_UINT32("aperture-size", SiFiveCLINTState, aperture_size, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void sifive_clint_realize(DeviceState *dev, Error **errp)
{
SiFiveCLINTState *s = SIFIVE_CLINT(dev);
memory_region_init_io(&s->mmio, OBJECT(dev), &sifive_clint_ops, s,
TYPE_SIFIVE_CLINT, s->aperture_size);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mmio);
}
static void sifive_clint_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = sifive_clint_realize;
dc->props = sifive_clint_properties;
}
static const TypeInfo sifive_clint_info = {
.name = TYPE_SIFIVE_CLINT,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SiFiveCLINTState),
.class_init = sifive_clint_class_init,
};
static void sifive_clint_register_types(void)
{
type_register_static(&sifive_clint_info);
}
type_init(sifive_clint_register_types)
/*
* Create CLINT device.
*/
DeviceState *sifive_clint_create(hwaddr addr, hwaddr size, uint32_t num_harts,
uint32_t sip_base, uint32_t timecmp_base, uint32_t time_base)
{
int i;
for (i = 0; i < num_harts; i++) {
CPUState *cpu = qemu_get_cpu(i);
CPURISCVState *env = cpu ? cpu->env_ptr : NULL;
if (!env) {
continue;
}
env->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
&sifive_clint_timer_cb, cpu);
env->timecmp = 0;
}
DeviceState *dev = qdev_create(NULL, TYPE_SIFIVE_CLINT);
qdev_prop_set_uint32(dev, "num-harts", num_harts);
qdev_prop_set_uint32(dev, "sip-base", sip_base);
qdev_prop_set_uint32(dev, "timecmp-base", timecmp_base);
qdev_prop_set_uint32(dev, "time-base", time_base);
qdev_prop_set_uint32(dev, "aperture-size", size);
qdev_init_nofail(dev);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
return dev;
}

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/*
* QEMU RISC-V Board Compatible with SiFive Freedom E SDK
*
* Copyright (c) 2017 SiFive, Inc.
*
* Provides a board compatible with the SiFive Freedom E SDK:
*
* 0) UART
* 1) CLINT (Core Level Interruptor)
* 2) PLIC (Platform Level Interrupt Controller)
* 3) PRCI (Power, Reset, Clock, Interrupt)
* 4) Registers emulated as RAM: AON, GPIO, QSPI, PWM
* 5) Flash memory emulated as RAM
*
* The Mask ROM reset vector jumps to the flash payload at 0x2040_0000.
* The OTP ROM and Flash boot code will be emulated in a future version.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "hw/sysbus.h"
#include "hw/char/serial.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/riscv_hart.h"
#include "hw/riscv/sifive_plic.h"
#include "hw/riscv/sifive_clint.h"
#include "hw/riscv/sifive_prci.h"
#include "hw/riscv/sifive_uart.h"
#include "hw/riscv/sifive_e.h"
#include "chardev/char.h"
#include "sysemu/arch_init.h"
#include "exec/address-spaces.h"
#include "elf.h"
static const struct MemmapEntry {
hwaddr base;
hwaddr size;
} sifive_e_memmap[] = {
[SIFIVE_E_DEBUG] = { 0x0, 0x100 },
[SIFIVE_E_MROM] = { 0x1000, 0x2000 },
[SIFIVE_E_OTP] = { 0x20000, 0x2000 },
[SIFIVE_E_CLINT] = { 0x2000000, 0x10000 },
[SIFIVE_E_PLIC] = { 0xc000000, 0x4000000 },
[SIFIVE_E_AON] = { 0x10000000, 0x8000 },
[SIFIVE_E_PRCI] = { 0x10008000, 0x8000 },
[SIFIVE_E_OTP_CTRL] = { 0x10010000, 0x1000 },
[SIFIVE_E_GPIO0] = { 0x10012000, 0x1000 },
[SIFIVE_E_UART0] = { 0x10013000, 0x1000 },
[SIFIVE_E_QSPI0] = { 0x10014000, 0x1000 },
[SIFIVE_E_PWM0] = { 0x10015000, 0x1000 },
[SIFIVE_E_UART1] = { 0x10023000, 0x1000 },
[SIFIVE_E_QSPI1] = { 0x10024000, 0x1000 },
[SIFIVE_E_PWM1] = { 0x10025000, 0x1000 },
[SIFIVE_E_QSPI2] = { 0x10034000, 0x1000 },
[SIFIVE_E_PWM2] = { 0x10035000, 0x1000 },
[SIFIVE_E_XIP] = { 0x20000000, 0x20000000 },
[SIFIVE_E_DTIM] = { 0x80000000, 0x4000 }
};
static void copy_le32_to_phys(hwaddr pa, uint32_t *rom, size_t len)
{
int i;
for (i = 0; i < (len >> 2); i++) {
stl_phys(&address_space_memory, pa + (i << 2), rom[i]);
}
}
static uint64_t identity_translate(void *opaque, uint64_t addr)
{
return addr;
}
static uint64_t load_kernel(const char *kernel_filename)
{
uint64_t kernel_entry, kernel_high;
if (load_elf(kernel_filename, identity_translate, NULL,
&kernel_entry, NULL, &kernel_high,
0, ELF_MACHINE, 1, 0) < 0) {
error_report("qemu: could not load kernel '%s'", kernel_filename);
exit(1);
}
return kernel_entry;
}
static void sifive_mmio_emulate(MemoryRegion *parent, const char *name,
uintptr_t offset, uintptr_t length)
{
MemoryRegion *mock_mmio = g_new(MemoryRegion, 1);
memory_region_init_ram(mock_mmio, NULL, name, length, &error_fatal);
memory_region_add_subregion(parent, offset, mock_mmio);
}
static void riscv_sifive_e_init(MachineState *machine)
{
const struct MemmapEntry *memmap = sifive_e_memmap;
SiFiveEState *s = g_new0(SiFiveEState, 1);
MemoryRegion *sys_mem = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
MemoryRegion *xip_mem = g_new(MemoryRegion, 1);
/* Initialize SOC */
object_initialize(&s->soc, sizeof(s->soc), TYPE_RISCV_HART_ARRAY);
object_property_add_child(OBJECT(machine), "soc", OBJECT(&s->soc),
&error_abort);
object_property_set_str(OBJECT(&s->soc), SIFIVE_E_CPU, "cpu-type",
&error_abort);
object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
&error_abort);
object_property_set_bool(OBJECT(&s->soc), true, "realized",
&error_abort);
/* Data Tightly Integrated Memory */
memory_region_init_ram(main_mem, NULL, "riscv.sifive.e.ram",
memmap[SIFIVE_E_DTIM].size, &error_fatal);
memory_region_add_subregion(sys_mem,
memmap[SIFIVE_E_DTIM].base, main_mem);
/* Mask ROM */
memory_region_init_ram(mask_rom, NULL, "riscv.sifive.e.mrom",
memmap[SIFIVE_E_MROM].size, &error_fatal);
memory_region_add_subregion(sys_mem,
memmap[SIFIVE_E_MROM].base, mask_rom);
/* MMIO */
s->plic = sifive_plic_create(memmap[SIFIVE_E_PLIC].base,
(char *)SIFIVE_E_PLIC_HART_CONFIG,
SIFIVE_E_PLIC_NUM_SOURCES,
SIFIVE_E_PLIC_NUM_PRIORITIES,
SIFIVE_E_PLIC_PRIORITY_BASE,
SIFIVE_E_PLIC_PENDING_BASE,
SIFIVE_E_PLIC_ENABLE_BASE,
SIFIVE_E_PLIC_ENABLE_STRIDE,
SIFIVE_E_PLIC_CONTEXT_BASE,
SIFIVE_E_PLIC_CONTEXT_STRIDE,
memmap[SIFIVE_E_PLIC].size);
sifive_clint_create(memmap[SIFIVE_E_CLINT].base,
memmap[SIFIVE_E_CLINT].size, smp_cpus,
SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.aon",
memmap[SIFIVE_E_AON].base, memmap[SIFIVE_E_AON].size);
sifive_prci_create(memmap[SIFIVE_E_PRCI].base);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.gpio0",
memmap[SIFIVE_E_GPIO0].base, memmap[SIFIVE_E_GPIO0].size);
sifive_uart_create(sys_mem, memmap[SIFIVE_E_UART0].base,
serial_hds[0], SIFIVE_PLIC(s->plic)->irqs[SIFIVE_E_UART0_IRQ]);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi0",
memmap[SIFIVE_E_QSPI0].base, memmap[SIFIVE_E_QSPI0].size);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm0",
memmap[SIFIVE_E_PWM0].base, memmap[SIFIVE_E_PWM0].size);
/* sifive_uart_create(sys_mem, memmap[SIFIVE_E_UART1].base,
serial_hds[1], SIFIVE_PLIC(s->plic)->irqs[SIFIVE_E_UART1_IRQ]); */
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi1",
memmap[SIFIVE_E_QSPI1].base, memmap[SIFIVE_E_QSPI1].size);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm1",
memmap[SIFIVE_E_PWM1].base, memmap[SIFIVE_E_PWM1].size);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi2",
memmap[SIFIVE_E_QSPI2].base, memmap[SIFIVE_E_QSPI2].size);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm2",
memmap[SIFIVE_E_PWM2].base, memmap[SIFIVE_E_PWM2].size);
/* Flash memory */
memory_region_init_ram(xip_mem, NULL, "riscv.sifive.e.xip",
memmap[SIFIVE_E_XIP].size, &error_fatal);
memory_region_set_readonly(xip_mem, true);
memory_region_add_subregion(sys_mem, memmap[SIFIVE_E_XIP].base, xip_mem);
/* Mask ROM reset vector */
uint32_t reset_vec[2] = {
0x204002b7, /* 0x1000: lui t0,0x20400 */
0x00028067, /* 0x1004: jr t0 */
};
/* copy in the reset vector */
copy_le32_to_phys(memmap[SIFIVE_E_MROM].base, reset_vec, sizeof(reset_vec));
memory_region_set_readonly(mask_rom, true);
if (machine->kernel_filename) {
load_kernel(machine->kernel_filename);
}
}
static int riscv_sifive_e_sysbus_device_init(SysBusDevice *sysbusdev)
{
return 0;
}
static void riscv_sifive_e_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = riscv_sifive_e_sysbus_device_init;
}
static const TypeInfo riscv_sifive_e_device = {
.name = TYPE_SIFIVE_E,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SiFiveEState),
.class_init = riscv_sifive_e_class_init,
};
static void riscv_sifive_e_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Board compatible with SiFive E SDK";
mc->init = riscv_sifive_e_init;
mc->max_cpus = 1;
}
DEFINE_MACHINE("sifive_e", riscv_sifive_e_machine_init)
static void riscv_sifive_e_register_types(void)
{
type_register_static(&riscv_sifive_e_device);
}
type_init(riscv_sifive_e_register_types);

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/*
* SiFive PLIC (Platform Level Interrupt Controller)
*
* Copyright (c) 2017 SiFive, Inc.
*
* This provides a parameterizable interrupt controller based on SiFive's PLIC.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/error-report.h"
#include "hw/sysbus.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/sifive_plic.h"
#define RISCV_DEBUG_PLIC 0
static PLICMode char_to_mode(char c)
{
switch (c) {
case 'U': return PLICMode_U;
case 'S': return PLICMode_S;
case 'H': return PLICMode_H;
case 'M': return PLICMode_M;
default:
error_report("plic: invalid mode '%c'", c);
exit(1);
}
}
static char mode_to_char(PLICMode m)
{
switch (m) {
case PLICMode_U: return 'U';
case PLICMode_S: return 'S';
case PLICMode_H: return 'H';
case PLICMode_M: return 'M';
default: return '?';
}
}
static void sifive_plic_print_state(SiFivePLICState *plic)
{
int i;
int addrid;
/* pending */
qemu_log("pending : ");
for (i = plic->bitfield_words - 1; i >= 0; i--) {
qemu_log("%08x", plic->pending[i]);
}
qemu_log("\n");
/* pending */
qemu_log("claimed : ");
for (i = plic->bitfield_words - 1; i >= 0; i--) {
qemu_log("%08x", plic->claimed[i]);
}
qemu_log("\n");
for (addrid = 0; addrid < plic->num_addrs; addrid++) {
qemu_log("hart%d-%c enable: ",
plic->addr_config[addrid].hartid,
mode_to_char(plic->addr_config[addrid].mode));
for (i = plic->bitfield_words - 1; i >= 0; i--) {
qemu_log("%08x", plic->enable[addrid * plic->bitfield_words + i]);
}
qemu_log("\n");
}
}
static
void sifive_plic_set_pending(SiFivePLICState *plic, int irq, bool pending)
{
qemu_mutex_lock(&plic->lock);
uint32_t word = irq >> 5;
if (pending) {
plic->pending[word] |= (1 << (irq & 31));
} else {
plic->pending[word] &= ~(1 << (irq & 31));
}
qemu_mutex_unlock(&plic->lock);
}
static
void sifive_plic_set_claimed(SiFivePLICState *plic, int irq, bool claimed)
{
qemu_mutex_lock(&plic->lock);
uint32_t word = irq >> 5;
if (claimed) {
plic->claimed[word] |= (1 << (irq & 31));
} else {
plic->claimed[word] &= ~(1 << (irq & 31));
}
qemu_mutex_unlock(&plic->lock);
}
static
int sifive_plic_num_irqs_pending(SiFivePLICState *plic, uint32_t addrid)
{
int i, j, count = 0;
for (i = 0; i < plic->bitfield_words; i++) {
uint32_t pending_enabled_not_claimed =
(plic->pending[i] & ~plic->claimed[i]) &
plic->enable[addrid * plic->bitfield_words + i];
if (!pending_enabled_not_claimed) {
continue;
}
for (j = 0; j < 32; j++) {
int irq = (i << 5) + j;
uint32_t prio = plic->source_priority[irq];
int enabled = pending_enabled_not_claimed & (1 << j);
if (enabled && prio > plic->target_priority[addrid]) {
count++;
}
}
}
return count;
}
static void sifive_plic_update(SiFivePLICState *plic)
{
int addrid;
/* raise irq on harts where this irq is enabled */
for (addrid = 0; addrid < plic->num_addrs; addrid++) {
uint32_t hartid = plic->addr_config[addrid].hartid;
PLICMode mode = plic->addr_config[addrid].mode;
CPUState *cpu = qemu_get_cpu(hartid);
CPURISCVState *env = cpu ? cpu->env_ptr : NULL;
if (!env) {
continue;
}
int level = sifive_plic_num_irqs_pending(plic, addrid) > 0;
switch (mode) {
case PLICMode_M:
riscv_set_local_interrupt(RISCV_CPU(cpu), MIP_MEIP, level);
break;
case PLICMode_S:
riscv_set_local_interrupt(RISCV_CPU(cpu), MIP_SEIP, level);
break;
default:
break;
}
}
if (RISCV_DEBUG_PLIC) {
sifive_plic_print_state(plic);
}
}
void sifive_plic_raise_irq(SiFivePLICState *plic, uint32_t irq)
{
sifive_plic_set_pending(plic, irq, true);
sifive_plic_update(plic);
}
void sifive_plic_lower_irq(SiFivePLICState *plic, uint32_t irq)
{
sifive_plic_set_pending(plic, irq, false);
sifive_plic_update(plic);
}
static uint32_t sifive_plic_claim(SiFivePLICState *plic, uint32_t addrid)
{
int i, j;
for (i = 0; i < plic->bitfield_words; i++) {
uint32_t pending_enabled_not_claimed =
(plic->pending[i] & ~plic->claimed[i]) &
plic->enable[addrid * plic->bitfield_words + i];
if (!pending_enabled_not_claimed) {
continue;
}
for (j = 0; j < 32; j++) {
int irq = (i << 5) + j;
uint32_t prio = plic->source_priority[irq];
int enabled = pending_enabled_not_claimed & (1 << j);
if (enabled && prio > plic->target_priority[addrid]) {
sifive_plic_set_pending(plic, irq, false);
sifive_plic_set_claimed(plic, irq, true);
return irq;
}
}
}
return 0;
}
static uint64_t sifive_plic_read(void *opaque, hwaddr addr, unsigned size)
{
SiFivePLICState *plic = opaque;
/* writes must be 4 byte words */
if ((addr & 0x3) != 0) {
goto err;
}
if (addr >= plic->priority_base && /* 4 bytes per source */
addr < plic->priority_base + (plic->num_sources << 2))
{
uint32_t irq = (addr - plic->priority_base) >> 2;
if (RISCV_DEBUG_PLIC) {
qemu_log("plic: read priority: irq=%d priority=%d\n",
irq, plic->source_priority[irq]);
}
return plic->source_priority[irq];
} else if (addr >= plic->pending_base && /* 1 bit per source */
addr < plic->pending_base + (plic->num_sources >> 3))
{
uint32_t word = (addr - plic->priority_base) >> 2;
if (RISCV_DEBUG_PLIC) {
qemu_log("plic: read pending: word=%d value=%d\n",
word, plic->pending[word]);
}
return plic->pending[word];
} else if (addr >= plic->enable_base && /* 1 bit per source */
addr < plic->enable_base + plic->num_addrs * plic->enable_stride)
{
uint32_t addrid = (addr - plic->enable_base) / plic->enable_stride;
uint32_t wordid = (addr & (plic->enable_stride - 1)) >> 2;
if (wordid < plic->bitfield_words) {
if (RISCV_DEBUG_PLIC) {
qemu_log("plic: read enable: hart%d-%c word=%d value=%x\n",
plic->addr_config[addrid].hartid,
mode_to_char(plic->addr_config[addrid].mode), wordid,
plic->enable[addrid * plic->bitfield_words + wordid]);
}
return plic->enable[addrid * plic->bitfield_words + wordid];
}
} else if (addr >= plic->context_base && /* 1 bit per source */
addr < plic->context_base + plic->num_addrs * plic->context_stride)
{
uint32_t addrid = (addr - plic->context_base) / plic->context_stride;
uint32_t contextid = (addr & (plic->context_stride - 1));
if (contextid == 0) {
if (RISCV_DEBUG_PLIC) {
qemu_log("plic: read priority: hart%d-%c priority=%x\n",
plic->addr_config[addrid].hartid,
mode_to_char(plic->addr_config[addrid].mode),
plic->target_priority[addrid]);
}
return plic->target_priority[addrid];
} else if (contextid == 4) {
uint32_t value = sifive_plic_claim(plic, addrid);
if (RISCV_DEBUG_PLIC) {
qemu_log("plic: read claim: hart%d-%c irq=%x\n",
plic->addr_config[addrid].hartid,
mode_to_char(plic->addr_config[addrid].mode),
value);
sifive_plic_print_state(plic);
}
return value;
}
}
err:
error_report("plic: invalid register read: %08x", (uint32_t)addr);
return 0;
}
static void sifive_plic_write(void *opaque, hwaddr addr, uint64_t value,
unsigned size)
{
SiFivePLICState *plic = opaque;
/* writes must be 4 byte words */
if ((addr & 0x3) != 0) {
goto err;
}
if (addr >= plic->priority_base && /* 4 bytes per source */
addr < plic->priority_base + (plic->num_sources << 2))
{
uint32_t irq = (addr - plic->priority_base) >> 2;
plic->source_priority[irq] = value & 7;
if (RISCV_DEBUG_PLIC) {
qemu_log("plic: write priority: irq=%d priority=%d\n",
irq, plic->source_priority[irq]);
}
return;
} else if (addr >= plic->pending_base && /* 1 bit per source */
addr < plic->pending_base + (plic->num_sources >> 3))
{
error_report("plic: invalid pending write: %08x", (uint32_t)addr);
return;
} else if (addr >= plic->enable_base && /* 1 bit per source */
addr < plic->enable_base + plic->num_addrs * plic->enable_stride)
{
uint32_t addrid = (addr - plic->enable_base) / plic->enable_stride;
uint32_t wordid = (addr & (plic->enable_stride - 1)) >> 2;
if (wordid < plic->bitfield_words) {
plic->enable[addrid * plic->bitfield_words + wordid] = value;
if (RISCV_DEBUG_PLIC) {
qemu_log("plic: write enable: hart%d-%c word=%d value=%x\n",
plic->addr_config[addrid].hartid,
mode_to_char(plic->addr_config[addrid].mode), wordid,
plic->enable[addrid * plic->bitfield_words + wordid]);
}
return;
}
} else if (addr >= plic->context_base && /* 4 bytes per reg */
addr < plic->context_base + plic->num_addrs * plic->context_stride)
{
uint32_t addrid = (addr - plic->context_base) / plic->context_stride;
uint32_t contextid = (addr & (plic->context_stride - 1));
if (contextid == 0) {
if (RISCV_DEBUG_PLIC) {
qemu_log("plic: write priority: hart%d-%c priority=%x\n",
plic->addr_config[addrid].hartid,
mode_to_char(plic->addr_config[addrid].mode),
plic->target_priority[addrid]);
}
if (value <= plic->num_priorities) {
plic->target_priority[addrid] = value;
sifive_plic_update(plic);
}
return;
} else if (contextid == 4) {
if (RISCV_DEBUG_PLIC) {
qemu_log("plic: write claim: hart%d-%c irq=%x\n",
plic->addr_config[addrid].hartid,
mode_to_char(plic->addr_config[addrid].mode),
(uint32_t)value);
}
if (value < plic->num_sources) {
sifive_plic_set_claimed(plic, value, false);
sifive_plic_update(plic);
}
return;
}
}
err:
error_report("plic: invalid register write: %08x", (uint32_t)addr);
}
static const MemoryRegionOps sifive_plic_ops = {
.read = sifive_plic_read,
.write = sifive_plic_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4
}
};
static Property sifive_plic_properties[] = {
DEFINE_PROP_STRING("hart-config", SiFivePLICState, hart_config),
DEFINE_PROP_UINT32("num-sources", SiFivePLICState, num_sources, 0),
DEFINE_PROP_UINT32("num-priorities", SiFivePLICState, num_priorities, 0),
DEFINE_PROP_UINT32("priority-base", SiFivePLICState, priority_base, 0),
DEFINE_PROP_UINT32("pending-base", SiFivePLICState, pending_base, 0),
DEFINE_PROP_UINT32("enable-base", SiFivePLICState, enable_base, 0),
DEFINE_PROP_UINT32("enable-stride", SiFivePLICState, enable_stride, 0),
DEFINE_PROP_UINT32("context-base", SiFivePLICState, context_base, 0),
DEFINE_PROP_UINT32("context-stride", SiFivePLICState, context_stride, 0),
DEFINE_PROP_UINT32("aperture-size", SiFivePLICState, aperture_size, 0),
DEFINE_PROP_END_OF_LIST(),
};
/*
* parse PLIC hart/mode address offset config
*
* "M" 1 hart with M mode
* "MS,MS" 2 harts, 0-1 with M and S mode
* "M,MS,MS,MS,MS" 5 harts, 0 with M mode, 1-5 with M and S mode
*/
static void parse_hart_config(SiFivePLICState *plic)
{
int addrid, hartid, modes;
const char *p;
char c;
/* count and validate hart/mode combinations */
addrid = 0, hartid = 0, modes = 0;
p = plic->hart_config;
while ((c = *p++)) {
if (c == ',') {
addrid += __builtin_popcount(modes);
modes = 0;
hartid++;
} else {
int m = 1 << char_to_mode(c);
if (modes == (modes | m)) {
error_report("plic: duplicate mode '%c' in config: %s",
c, plic->hart_config);
exit(1);
}
modes |= m;
}
}
if (modes) {
addrid += __builtin_popcount(modes);
}
hartid++;
/* store hart/mode combinations */
plic->num_addrs = addrid;
plic->addr_config = g_new(PLICAddr, plic->num_addrs);
addrid = 0, hartid = 0;
p = plic->hart_config;
while ((c = *p++)) {
if (c == ',') {
hartid++;
} else {
plic->addr_config[addrid].addrid = addrid;
plic->addr_config[addrid].hartid = hartid;
plic->addr_config[addrid].mode = char_to_mode(c);
addrid++;
}
}
}
static void sifive_plic_irq_request(void *opaque, int irq, int level)
{
SiFivePLICState *plic = opaque;
if (RISCV_DEBUG_PLIC) {
qemu_log("sifive_plic_irq_request: irq=%d level=%d\n", irq, level);
}
sifive_plic_set_pending(plic, irq, level > 0);
sifive_plic_update(plic);
}
static void sifive_plic_realize(DeviceState *dev, Error **errp)
{
SiFivePLICState *plic = SIFIVE_PLIC(dev);
int i;
memory_region_init_io(&plic->mmio, OBJECT(dev), &sifive_plic_ops, plic,
TYPE_SIFIVE_PLIC, plic->aperture_size);
parse_hart_config(plic);
qemu_mutex_init(&plic->lock);
plic->bitfield_words = (plic->num_sources + 31) >> 5;
plic->source_priority = g_new0(uint32_t, plic->num_sources);
plic->target_priority = g_new(uint32_t, plic->num_addrs);
plic->pending = g_new0(uint32_t, plic->bitfield_words);
plic->claimed = g_new0(uint32_t, plic->bitfield_words);
plic->enable = g_new0(uint32_t, plic->bitfield_words * plic->num_addrs);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &plic->mmio);
plic->irqs = g_new0(qemu_irq, plic->num_sources + 1);
for (i = 0; i <= plic->num_sources; i++) {
plic->irqs[i] = qemu_allocate_irq(sifive_plic_irq_request, plic, i);
}
}
static void sifive_plic_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->props = sifive_plic_properties;
dc->realize = sifive_plic_realize;
}
static const TypeInfo sifive_plic_info = {
.name = TYPE_SIFIVE_PLIC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SiFivePLICState),
.class_init = sifive_plic_class_init,
};
static void sifive_plic_register_types(void)
{
type_register_static(&sifive_plic_info);
}
type_init(sifive_plic_register_types)
/*
* Create PLIC device.
*/
DeviceState *sifive_plic_create(hwaddr addr, char *hart_config,
uint32_t num_sources, uint32_t num_priorities,
uint32_t priority_base, uint32_t pending_base,
uint32_t enable_base, uint32_t enable_stride,
uint32_t context_base, uint32_t context_stride,
uint32_t aperture_size)
{
DeviceState *dev = qdev_create(NULL, TYPE_SIFIVE_PLIC);
assert(enable_stride == (enable_stride & -enable_stride));
assert(context_stride == (context_stride & -context_stride));
qdev_prop_set_string(dev, "hart-config", hart_config);
qdev_prop_set_uint32(dev, "num-sources", num_sources);
qdev_prop_set_uint32(dev, "num-priorities", num_priorities);
qdev_prop_set_uint32(dev, "priority-base", priority_base);
qdev_prop_set_uint32(dev, "pending-base", pending_base);
qdev_prop_set_uint32(dev, "enable-base", enable_base);
qdev_prop_set_uint32(dev, "enable-stride", enable_stride);
qdev_prop_set_uint32(dev, "context-base", context_base);
qdev_prop_set_uint32(dev, "context-stride", context_stride);
qdev_prop_set_uint32(dev, "aperture-size", aperture_size);
qdev_init_nofail(dev);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
return dev;
}

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/*
* QEMU SiFive PRCI (Power, Reset, Clock, Interrupt)
*
* Copyright (c) 2017 SiFive, Inc.
*
* Simple model of the PRCI to emulate register reads made by the SDK BSP
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/sysbus.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/sifive_prci.h"
/* currently implements enough to mock freedom-e-sdk BSP clock programming */
static uint64_t sifive_prci_read(void *opaque, hwaddr addr, unsigned int size)
{
if (addr == 0 /* PRCI_HFROSCCFG */) {
return 1 << 31; /* ROSC_RDY */
}
if (addr == 8 /* PRCI_PLLCFG */) {
return 1 << 31; /* PLL_LOCK */
}
hw_error("%s: read: addr=0x%x\n", __func__, (int)addr);
return 0;
}
static void sifive_prci_write(void *opaque, hwaddr addr,
uint64_t val64, unsigned int size)
{
/* discard writes */
}
static const MemoryRegionOps sifive_prci_ops = {
.read = sifive_prci_read,
.write = sifive_prci_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4
}
};
static void sifive_prci_init(Object *obj)
{
SiFivePRCIState *s = SIFIVE_PRCI(obj);
memory_region_init_io(&s->mmio, obj, &sifive_prci_ops, s,
TYPE_SIFIVE_PRCI, 0x8000);
sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
}
static const TypeInfo sifive_prci_info = {
.name = TYPE_SIFIVE_PRCI,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SiFivePRCIState),
.instance_init = sifive_prci_init,
};
static void sifive_prci_register_types(void)
{
type_register_static(&sifive_prci_info);
}
type_init(sifive_prci_register_types)
/*
* Create PRCI device.
*/
DeviceState *sifive_prci_create(hwaddr addr)
{
DeviceState *dev = qdev_create(NULL, TYPE_SIFIVE_PRCI);
qdev_init_nofail(dev);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
return dev;
}

93
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/*
* QEMU SiFive Test Finisher
*
* Copyright (c) 2018 SiFive, Inc.
*
* Test finisher memory mapped device used to exit simulation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/sysbus.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/sifive_test.h"
static uint64_t sifive_test_read(void *opaque, hwaddr addr, unsigned int size)
{
return 0;
}
static void sifive_test_write(void *opaque, hwaddr addr,
uint64_t val64, unsigned int size)
{
if (addr == 0) {
int status = val64 & 0xffff;
int code = (val64 >> 16) & 0xffff;
switch (status) {
case FINISHER_FAIL:
exit(code);
case FINISHER_PASS:
exit(0);
default:
break;
}
}
hw_error("%s: write: addr=0x%x val=0x%016" PRIx64 "\n",
__func__, (int)addr, val64);
}
static const MemoryRegionOps sifive_test_ops = {
.read = sifive_test_read,
.write = sifive_test_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4
}
};
static void sifive_test_init(Object *obj)
{
SiFiveTestState *s = SIFIVE_TEST(obj);
memory_region_init_io(&s->mmio, obj, &sifive_test_ops, s,
TYPE_SIFIVE_TEST, 0x1000);
sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
}
static const TypeInfo sifive_test_info = {
.name = TYPE_SIFIVE_TEST,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SiFiveTestState),
.instance_init = sifive_test_init,
};
static void sifive_test_register_types(void)
{
type_register_static(&sifive_test_info);
}
type_init(sifive_test_register_types)
/*
* Create Test device.
*/
DeviceState *sifive_test_create(hwaddr addr)
{
DeviceState *dev = qdev_create(NULL, TYPE_SIFIVE_TEST);
qdev_init_nofail(dev);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
return dev;
}

339
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/*
* QEMU RISC-V Board Compatible with SiFive Freedom U SDK
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017 SiFive, Inc.
*
* Provides a board compatible with the SiFive Freedom U SDK:
*
* 0) UART
* 1) CLINT (Core Level Interruptor)
* 2) PLIC (Platform Level Interrupt Controller)
*
* This board currently uses a hardcoded devicetree that indicates one hart.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "hw/sysbus.h"
#include "hw/char/serial.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/riscv_hart.h"
#include "hw/riscv/sifive_plic.h"
#include "hw/riscv/sifive_clint.h"
#include "hw/riscv/sifive_uart.h"
#include "hw/riscv/sifive_prci.h"
#include "hw/riscv/sifive_u.h"
#include "chardev/char.h"
#include "sysemu/arch_init.h"
#include "sysemu/device_tree.h"
#include "exec/address-spaces.h"
#include "elf.h"
static const struct MemmapEntry {
hwaddr base;
hwaddr size;
} sifive_u_memmap[] = {
[SIFIVE_U_DEBUG] = { 0x0, 0x100 },
[SIFIVE_U_MROM] = { 0x1000, 0x2000 },
[SIFIVE_U_CLINT] = { 0x2000000, 0x10000 },
[SIFIVE_U_PLIC] = { 0xc000000, 0x4000000 },
[SIFIVE_U_UART0] = { 0x10013000, 0x1000 },
[SIFIVE_U_UART1] = { 0x10023000, 0x1000 },
[SIFIVE_U_DRAM] = { 0x80000000, 0x0 },
};
static void copy_le32_to_phys(hwaddr pa, uint32_t *rom, size_t len)
{
int i;
for (i = 0; i < (len >> 2); i++) {
stl_phys(&address_space_memory, pa + (i << 2), rom[i]);
}
}
static uint64_t identity_translate(void *opaque, uint64_t addr)
{
return addr;
}
static uint64_t load_kernel(const char *kernel_filename)
{
uint64_t kernel_entry, kernel_high;
if (load_elf(kernel_filename, identity_translate, NULL,
&kernel_entry, NULL, &kernel_high,
0, ELF_MACHINE, 1, 0) < 0) {
error_report("qemu: could not load kernel '%s'", kernel_filename);
exit(1);
}
return kernel_entry;
}
static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap,
uint64_t mem_size, const char *cmdline)
{
void *fdt;
int cpu;
uint32_t *cells;
char *nodename;
uint32_t plic_phandle;
fdt = s->fdt = create_device_tree(&s->fdt_size);
if (!fdt) {
error_report("create_device_tree() failed");
exit(1);
}
qemu_fdt_setprop_string(fdt, "/", "model", "ucbbar,spike-bare,qemu");
qemu_fdt_setprop_string(fdt, "/", "compatible", "ucbbar,spike-bare-dev");
qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x2);
qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x2);
qemu_fdt_add_subnode(fdt, "/soc");
qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0);
qemu_fdt_setprop_string(fdt, "/soc", "compatible", "ucbbar,spike-bare-soc");
qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x2);
qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2);
nodename = g_strdup_printf("/memory@%lx",
(long)memmap[SIFIVE_U_DRAM].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_cells(fdt, nodename, "reg",
memmap[SIFIVE_U_DRAM].base >> 32, memmap[SIFIVE_U_DRAM].base,
mem_size >> 32, mem_size);
qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
g_free(nodename);
qemu_fdt_add_subnode(fdt, "/cpus");
qemu_fdt_setprop_cell(fdt, "/cpus", "timebase-frequency", 10000000);
qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
for (cpu = s->soc.num_harts - 1; cpu >= 0; cpu--) {
nodename = g_strdup_printf("/cpus/cpu@%d", cpu);
char *intc = g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
char *isa = riscv_isa_string(&s->soc.harts[cpu]);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_cell(fdt, nodename, "clock-frequency", 1000000000);
qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv48");
qemu_fdt_setprop_string(fdt, nodename, "riscv,isa", isa);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv");
qemu_fdt_setprop_string(fdt, nodename, "status", "okay");
qemu_fdt_setprop_cell(fdt, nodename, "reg", cpu);
qemu_fdt_setprop_string(fdt, nodename, "device_type", "cpu");
qemu_fdt_add_subnode(fdt, intc);
qemu_fdt_setprop_cell(fdt, intc, "phandle", 1);
qemu_fdt_setprop_cell(fdt, intc, "linux,phandle", 1);
qemu_fdt_setprop_string(fdt, intc, "compatible", "riscv,cpu-intc");
qemu_fdt_setprop(fdt, intc, "interrupt-controller", NULL, 0);
qemu_fdt_setprop_cell(fdt, intc, "#interrupt-cells", 1);
g_free(isa);
g_free(intc);
g_free(nodename);
}
cells = g_new0(uint32_t, s->soc.num_harts * 4);
for (cpu = 0; cpu < s->soc.num_harts; cpu++) {
nodename =
g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
uint32_t intc_phandle = qemu_fdt_get_phandle(fdt, nodename);
cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_SOFT);
cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 3] = cpu_to_be32(IRQ_M_TIMER);
g_free(nodename);
}
nodename = g_strdup_printf("/soc/clint@%lx",
(long)memmap[SIFIVE_U_CLINT].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,clint0");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[SIFIVE_U_CLINT].base,
0x0, memmap[SIFIVE_U_CLINT].size);
qemu_fdt_setprop(fdt, nodename, "interrupts-extended",
cells, s->soc.num_harts * sizeof(uint32_t) * 4);
g_free(cells);
g_free(nodename);
cells = g_new0(uint32_t, s->soc.num_harts * 4);
for (cpu = 0; cpu < s->soc.num_harts; cpu++) {
nodename =
g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
uint32_t intc_phandle = qemu_fdt_get_phandle(fdt, nodename);
cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_EXT);
cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT);
g_free(nodename);
}
nodename = g_strdup_printf("/soc/interrupt-controller@%lx",
(long)memmap[SIFIVE_U_PLIC].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_cell(fdt, nodename, "#interrupt-cells", 1);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,plic0");
qemu_fdt_setprop(fdt, nodename, "interrupt-controller", NULL, 0);
qemu_fdt_setprop(fdt, nodename, "interrupts-extended",
cells, s->soc.num_harts * sizeof(uint32_t) * 4);
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[SIFIVE_U_PLIC].base,
0x0, memmap[SIFIVE_U_PLIC].size);
qemu_fdt_setprop_string(fdt, nodename, "reg-names", "control");
qemu_fdt_setprop_cell(fdt, nodename, "riscv,max-priority", 7);
qemu_fdt_setprop_cell(fdt, nodename, "riscv,ndev", 4);
qemu_fdt_setprop_cells(fdt, nodename, "phandle", 2);
qemu_fdt_setprop_cells(fdt, nodename, "linux,phandle", 2);
plic_phandle = qemu_fdt_get_phandle(fdt, nodename);
g_free(cells);
g_free(nodename);
nodename = g_strdup_printf("/uart@%lx",
(long)memmap[SIFIVE_U_UART0].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "sifive,uart0");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[SIFIVE_U_UART0].base,
0x0, memmap[SIFIVE_U_UART0].size);
qemu_fdt_setprop_cells(fdt, nodename, "interrupt-parent", plic_phandle);
qemu_fdt_setprop_cells(fdt, nodename, "interrupts", 1);
qemu_fdt_add_subnode(fdt, "/chosen");
qemu_fdt_setprop_string(fdt, "/chosen", "stdout-path", nodename);
qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
g_free(nodename);
}
static void riscv_sifive_u_init(MachineState *machine)
{
const struct MemmapEntry *memmap = sifive_u_memmap;
SiFiveUState *s = g_new0(SiFiveUState, 1);
MemoryRegion *sys_memory = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
MemoryRegion *boot_rom = g_new(MemoryRegion, 1);
/* Initialize SOC */
object_initialize(&s->soc, sizeof(s->soc), TYPE_RISCV_HART_ARRAY);
object_property_add_child(OBJECT(machine), "soc", OBJECT(&s->soc),
&error_abort);
object_property_set_str(OBJECT(&s->soc), SIFIVE_U_CPU, "cpu-type",
&error_abort);
object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
&error_abort);
object_property_set_bool(OBJECT(&s->soc), true, "realized",
&error_abort);
/* register RAM */
memory_region_init_ram(main_mem, NULL, "riscv.sifive.u.ram",
machine->ram_size, &error_fatal);
memory_region_add_subregion(sys_memory, memmap[SIFIVE_U_DRAM].base,
main_mem);
/* create device tree */
create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
/* boot rom */
memory_region_init_ram(boot_rom, NULL, "riscv.sifive.u.mrom",
memmap[SIFIVE_U_MROM].base, &error_fatal);
memory_region_set_readonly(boot_rom, true);
memory_region_add_subregion(sys_memory, 0x0, boot_rom);
if (machine->kernel_filename) {
load_kernel(machine->kernel_filename);
}
/* reset vector */
uint32_t reset_vec[8] = {
0x00000297, /* 1: auipc t0, %pcrel_hi(dtb) */
0x02028593, /* addi a1, t0, %pcrel_lo(1b) */
0xf1402573, /* csrr a0, mhartid */
#if defined(TARGET_RISCV32)
0x0182a283, /* lw t0, 24(t0) */
#elif defined(TARGET_RISCV64)
0x0182b283, /* ld t0, 24(t0) */
#endif
0x00028067, /* jr t0 */
0x00000000,
memmap[SIFIVE_U_DRAM].base, /* start: .dword DRAM_BASE */
0x00000000,
/* dtb: */
};
/* copy in the reset vector */
copy_le32_to_phys(memmap[SIFIVE_U_MROM].base, reset_vec, sizeof(reset_vec));
/* copy in the device tree */
qemu_fdt_dumpdtb(s->fdt, s->fdt_size);
cpu_physical_memory_write(memmap[SIFIVE_U_MROM].base +
sizeof(reset_vec), s->fdt, s->fdt_size);
/* MMIO */
s->plic = sifive_plic_create(memmap[SIFIVE_U_PLIC].base,
(char *)SIFIVE_U_PLIC_HART_CONFIG,
SIFIVE_U_PLIC_NUM_SOURCES,
SIFIVE_U_PLIC_NUM_PRIORITIES,
SIFIVE_U_PLIC_PRIORITY_BASE,
SIFIVE_U_PLIC_PENDING_BASE,
SIFIVE_U_PLIC_ENABLE_BASE,
SIFIVE_U_PLIC_ENABLE_STRIDE,
SIFIVE_U_PLIC_CONTEXT_BASE,
SIFIVE_U_PLIC_CONTEXT_STRIDE,
memmap[SIFIVE_U_PLIC].size);
sifive_uart_create(sys_memory, memmap[SIFIVE_U_UART0].base,
serial_hds[0], SIFIVE_PLIC(s->plic)->irqs[SIFIVE_U_UART0_IRQ]);
/* sifive_uart_create(sys_memory, memmap[SIFIVE_U_UART1].base,
serial_hds[1], SIFIVE_PLIC(s->plic)->irqs[SIFIVE_U_UART1_IRQ]); */
sifive_clint_create(memmap[SIFIVE_U_CLINT].base,
memmap[SIFIVE_U_CLINT].size, smp_cpus,
SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE);
}
static int riscv_sifive_u_sysbus_device_init(SysBusDevice *sysbusdev)
{
return 0;
}
static void riscv_sifive_u_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = riscv_sifive_u_sysbus_device_init;
}
static const TypeInfo riscv_sifive_u_device = {
.name = TYPE_SIFIVE_U,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SiFiveUState),
.class_init = riscv_sifive_u_class_init,
};
static void riscv_sifive_u_register_types(void)
{
type_register_static(&riscv_sifive_u_device);
}
type_init(riscv_sifive_u_register_types);
static void riscv_sifive_u_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Board compatible with SiFive U SDK";
mc->init = riscv_sifive_u_init;
mc->max_cpus = 1;
}
DEFINE_MACHINE("sifive_u", riscv_sifive_u_machine_init)

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/*
* QEMU model of the UART on the SiFive E300 and U500 series SOCs.
*
* Copyright (c) 2016 Stefan O'Rear
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/sysbus.h"
#include "chardev/char.h"
#include "chardev/char-fe.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/sifive_uart.h"
/*
* Not yet implemented:
*
* Transmit FIFO using "qemu/fifo8.h"
* SIFIVE_UART_IE_TXWM interrupts
* SIFIVE_UART_IE_RXWM interrupts must honor fifo watermark
* Rx FIFO watermark interrupt trigger threshold
* Tx FIFO watermark interrupt trigger threshold.
*/
static void update_irq(SiFiveUARTState *s)
{
int cond = 0;
if ((s->ie & SIFIVE_UART_IE_RXWM) && s->rx_fifo_len) {
cond = 1;
}
if (cond) {
qemu_irq_raise(s->irq);
} else {
qemu_irq_lower(s->irq);
}
}
static uint64_t
uart_read(void *opaque, hwaddr addr, unsigned int size)
{
SiFiveUARTState *s = opaque;
unsigned char r;
switch (addr) {
case SIFIVE_UART_RXFIFO:
if (s->rx_fifo_len) {
r = s->rx_fifo[0];
memmove(s->rx_fifo, s->rx_fifo + 1, s->rx_fifo_len - 1);
s->rx_fifo_len--;
qemu_chr_fe_accept_input(&s->chr);
update_irq(s);
return r;
}
return 0x80000000;
case SIFIVE_UART_TXFIFO:
return 0; /* Should check tx fifo */
case SIFIVE_UART_IE:
return s->ie;
case SIFIVE_UART_IP:
return s->rx_fifo_len ? SIFIVE_UART_IP_RXWM : 0;
case SIFIVE_UART_TXCTRL:
return s->txctrl;
case SIFIVE_UART_RXCTRL:
return s->rxctrl;
case SIFIVE_UART_DIV:
return s->div;
}
hw_error("%s: bad read: addr=0x%x\n",
__func__, (int)addr);
return 0;
}
static void
uart_write(void *opaque, hwaddr addr,
uint64_t val64, unsigned int size)
{
SiFiveUARTState *s = opaque;
uint32_t value = val64;
unsigned char ch = value;
switch (addr) {
case SIFIVE_UART_TXFIFO:
qemu_chr_fe_write(&s->chr, &ch, 1);
return;
case SIFIVE_UART_IE:
s->ie = val64;
update_irq(s);
return;
case SIFIVE_UART_TXCTRL:
s->txctrl = val64;
return;
case SIFIVE_UART_RXCTRL:
s->rxctrl = val64;
return;
case SIFIVE_UART_DIV:
s->div = val64;
return;
}
hw_error("%s: bad write: addr=0x%x v=0x%x\n",
__func__, (int)addr, (int)value);
}
static const MemoryRegionOps uart_ops = {
.read = uart_read,
.write = uart_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4
}
};
static void uart_rx(void *opaque, const uint8_t *buf, int size)
{
SiFiveUARTState *s = opaque;
/* Got a byte. */
if (s->rx_fifo_len >= sizeof(s->rx_fifo)) {
printf("WARNING: UART dropped char.\n");
return;
}
s->rx_fifo[s->rx_fifo_len++] = *buf;
update_irq(s);
}
static int uart_can_rx(void *opaque)
{
SiFiveUARTState *s = opaque;
return s->rx_fifo_len < sizeof(s->rx_fifo);
}
static void uart_event(void *opaque, int event)
{
}
static int uart_be_change(void *opaque)
{
SiFiveUARTState *s = opaque;
qemu_chr_fe_set_handlers(&s->chr, uart_can_rx, uart_rx, uart_event,
uart_be_change, s, NULL, true);
return 0;
}
/*
* Create UART device.
*/
SiFiveUARTState *sifive_uart_create(MemoryRegion *address_space, hwaddr base,
Chardev *chr, qemu_irq irq)
{
SiFiveUARTState *s = g_malloc0(sizeof(SiFiveUARTState));
s->irq = irq;
qemu_chr_fe_init(&s->chr, chr, &error_abort);
qemu_chr_fe_set_handlers(&s->chr, uart_can_rx, uart_rx, uart_event,
uart_be_change, s, NULL, true);
memory_region_init_io(&s->mmio, NULL, &uart_ops, s,
TYPE_SIFIVE_UART, SIFIVE_UART_MAX);
memory_region_add_subregion(address_space, base, &s->mmio);
return s;
}

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/*
* QEMU RISC-V Spike Board
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017-2018 SiFive, Inc.
*
* This provides a RISC-V Board with the following devices:
*
* 0) HTIF Console and Poweroff
* 1) CLINT (Timer and IPI)
* 2) PLIC (Platform Level Interrupt Controller)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "hw/sysbus.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/riscv_htif.h"
#include "hw/riscv/riscv_hart.h"
#include "hw/riscv/sifive_clint.h"
#include "hw/riscv/spike.h"
#include "chardev/char.h"
#include "sysemu/arch_init.h"
#include "sysemu/device_tree.h"
#include "exec/address-spaces.h"
#include "elf.h"
static const struct MemmapEntry {
hwaddr base;
hwaddr size;
} spike_memmap[] = {
[SPIKE_MROM] = { 0x1000, 0x2000 },
[SPIKE_CLINT] = { 0x2000000, 0x10000 },
[SPIKE_DRAM] = { 0x80000000, 0x0 },
};
static void copy_le32_to_phys(hwaddr pa, uint32_t *rom, size_t len)
{
int i;
for (i = 0; i < (len >> 2); i++) {
stl_phys(&address_space_memory, pa + (i << 2), rom[i]);
}
}
static uint64_t identity_translate(void *opaque, uint64_t addr)
{
return addr;
}
static uint64_t load_kernel(const char *kernel_filename)
{
uint64_t kernel_entry, kernel_high;
if (load_elf_ram_sym(kernel_filename, identity_translate, NULL,
&kernel_entry, NULL, &kernel_high, 0, ELF_MACHINE, 1, 0,
NULL, true, htif_symbol_callback) < 0) {
error_report("qemu: could not load kernel '%s'", kernel_filename);
exit(1);
}
return kernel_entry;
}
static void create_fdt(SpikeState *s, const struct MemmapEntry *memmap,
uint64_t mem_size, const char *cmdline)
{
void *fdt;
int cpu;
uint32_t *cells;
char *nodename;
fdt = s->fdt = create_device_tree(&s->fdt_size);
if (!fdt) {
error_report("create_device_tree() failed");
exit(1);
}
qemu_fdt_setprop_string(fdt, "/", "model", "ucbbar,spike-bare,qemu");
qemu_fdt_setprop_string(fdt, "/", "compatible", "ucbbar,spike-bare-dev");
qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x2);
qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x2);
qemu_fdt_add_subnode(fdt, "/htif");
qemu_fdt_setprop_string(fdt, "/htif", "compatible", "ucb,htif0");
qemu_fdt_add_subnode(fdt, "/soc");
qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0);
qemu_fdt_setprop_string(fdt, "/soc", "compatible", "ucbbar,spike-bare-soc");
qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x2);
qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2);
nodename = g_strdup_printf("/memory@%lx",
(long)memmap[SPIKE_DRAM].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_cells(fdt, nodename, "reg",
memmap[SPIKE_DRAM].base >> 32, memmap[SPIKE_DRAM].base,
mem_size >> 32, mem_size);
qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
g_free(nodename);
qemu_fdt_add_subnode(fdt, "/cpus");
qemu_fdt_setprop_cell(fdt, "/cpus", "timebase-frequency", 10000000);
qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
for (cpu = s->soc.num_harts - 1; cpu >= 0; cpu--) {
nodename = g_strdup_printf("/cpus/cpu@%d", cpu);
char *intc = g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
char *isa = riscv_isa_string(&s->soc.harts[cpu]);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_cell(fdt, nodename, "clock-frequency", 1000000000);
qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv48");
qemu_fdt_setprop_string(fdt, nodename, "riscv,isa", isa);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv");
qemu_fdt_setprop_string(fdt, nodename, "status", "okay");
qemu_fdt_setprop_cell(fdt, nodename, "reg", cpu);
qemu_fdt_setprop_string(fdt, nodename, "device_type", "cpu");
qemu_fdt_add_subnode(fdt, intc);
qemu_fdt_setprop_cell(fdt, intc, "phandle", 1);
qemu_fdt_setprop_cell(fdt, intc, "linux,phandle", 1);
qemu_fdt_setprop_string(fdt, intc, "compatible", "riscv,cpu-intc");
qemu_fdt_setprop(fdt, intc, "interrupt-controller", NULL, 0);
qemu_fdt_setprop_cell(fdt, intc, "#interrupt-cells", 1);
g_free(isa);
g_free(intc);
g_free(nodename);
}
cells = g_new0(uint32_t, s->soc.num_harts * 4);
for (cpu = 0; cpu < s->soc.num_harts; cpu++) {
nodename =
g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
uint32_t intc_phandle = qemu_fdt_get_phandle(fdt, nodename);
cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_SOFT);
cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 3] = cpu_to_be32(IRQ_M_TIMER);
g_free(nodename);
}
nodename = g_strdup_printf("/soc/clint@%lx",
(long)memmap[SPIKE_CLINT].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,clint0");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[SPIKE_CLINT].base,
0x0, memmap[SPIKE_CLINT].size);
qemu_fdt_setprop(fdt, nodename, "interrupts-extended",
cells, s->soc.num_harts * sizeof(uint32_t) * 4);
g_free(cells);
g_free(nodename);
qemu_fdt_add_subnode(fdt, "/chosen");
qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
}
static void spike_v1_10_0_board_init(MachineState *machine)
{
const struct MemmapEntry *memmap = spike_memmap;
SpikeState *s = g_new0(SpikeState, 1);
MemoryRegion *system_memory = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
MemoryRegion *boot_rom = g_new(MemoryRegion, 1);
/* Initialize SOC */
object_initialize(&s->soc, sizeof(s->soc), TYPE_RISCV_HART_ARRAY);
object_property_add_child(OBJECT(machine), "soc", OBJECT(&s->soc),
&error_abort);
object_property_set_str(OBJECT(&s->soc), SPIKE_V1_10_0_CPU, "cpu-type",
&error_abort);
object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
&error_abort);
object_property_set_bool(OBJECT(&s->soc), true, "realized",
&error_abort);
/* register system main memory (actual RAM) */
memory_region_init_ram(main_mem, NULL, "riscv.spike.ram",
machine->ram_size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base,
main_mem);
/* create device tree */
create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
/* boot rom */
memory_region_init_ram(boot_rom, NULL, "riscv.spike.bootrom",
s->fdt_size + 0x2000, &error_fatal);
memory_region_add_subregion(system_memory, 0x0, boot_rom);
if (machine->kernel_filename) {
load_kernel(machine->kernel_filename);
}
/* reset vector */
uint32_t reset_vec[8] = {
0x00000297, /* 1: auipc t0, %pcrel_hi(dtb) */
0x02028593, /* addi a1, t0, %pcrel_lo(1b) */
0xf1402573, /* csrr a0, mhartid */
#if defined(TARGET_RISCV32)
0x0182a283, /* lw t0, 24(t0) */
#elif defined(TARGET_RISCV64)
0x0182b283, /* ld t0, 24(t0) */
#endif
0x00028067, /* jr t0 */
0x00000000,
memmap[SPIKE_DRAM].base, /* start: .dword DRAM_BASE */
0x00000000,
/* dtb: */
};
/* copy in the reset vector */
copy_le32_to_phys(memmap[SPIKE_MROM].base, reset_vec, sizeof(reset_vec));
/* copy in the device tree */
qemu_fdt_dumpdtb(s->fdt, s->fdt_size);
cpu_physical_memory_write(memmap[SPIKE_MROM].base + sizeof(reset_vec),
s->fdt, s->fdt_size);
/* initialize HTIF using symbols found in load_kernel */
htif_mm_init(system_memory, boot_rom, &s->soc.harts[0].env, serial_hds[0]);
/* Core Local Interruptor (timer and IPI) */
sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE);
}
static void spike_v1_09_1_board_init(MachineState *machine)
{
const struct MemmapEntry *memmap = spike_memmap;
SpikeState *s = g_new0(SpikeState, 1);
MemoryRegion *system_memory = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
MemoryRegion *boot_rom = g_new(MemoryRegion, 1);
/* Initialize SOC */
object_initialize(&s->soc, sizeof(s->soc), TYPE_RISCV_HART_ARRAY);
object_property_add_child(OBJECT(machine), "soc", OBJECT(&s->soc),
&error_abort);
object_property_set_str(OBJECT(&s->soc), SPIKE_V1_09_1_CPU, "cpu-type",
&error_abort);
object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
&error_abort);
object_property_set_bool(OBJECT(&s->soc), true, "realized",
&error_abort);
/* register system main memory (actual RAM) */
memory_region_init_ram(main_mem, NULL, "riscv.spike.ram",
machine->ram_size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base,
main_mem);
/* boot rom */
memory_region_init_ram(boot_rom, NULL, "riscv.spike.bootrom",
0x40000, &error_fatal);
memory_region_add_subregion(system_memory, 0x0, boot_rom);
if (machine->kernel_filename) {
load_kernel(machine->kernel_filename);
}
/* reset vector */
uint32_t reset_vec[8] = {
0x297 + memmap[SPIKE_DRAM].base - memmap[SPIKE_MROM].base, /* lui */
0x00028067, /* jump to DRAM_BASE */
0x00000000, /* reserved */
memmap[SPIKE_MROM].base + sizeof(reset_vec), /* config string pointer */
0, 0, 0, 0 /* trap vector */
};
/* part one of config string - before memory size specified */
const char *config_string_tmpl =
"platform {\n"
" vendor ucb;\n"
" arch spike;\n"
"};\n"
"rtc {\n"
" addr 0x%" PRIx64 "x;\n"
"};\n"
"ram {\n"
" 0 {\n"
" addr 0x%" PRIx64 "x;\n"
" size 0x%" PRIx64 "x;\n"
" };\n"
"};\n"
"core {\n"
" 0" " {\n"
" " "0 {\n"
" isa %s;\n"
" timecmp 0x%" PRIx64 "x;\n"
" ipi 0x%" PRIx64 "x;\n"
" };\n"
" };\n"
"};\n";
/* build config string with supplied memory size */
char *isa = riscv_isa_string(&s->soc.harts[0]);
size_t config_string_size = strlen(config_string_tmpl) + 48;
char *config_string = malloc(config_string_size);
snprintf(config_string, config_string_size, config_string_tmpl,
(uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIME_BASE,
(uint64_t)memmap[SPIKE_DRAM].base,
(uint64_t)ram_size, isa,
(uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIMECMP_BASE,
(uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_SIP_BASE);
g_free(isa);
size_t config_string_len = strlen(config_string);
/* copy in the reset vector */
copy_le32_to_phys(memmap[SPIKE_MROM].base, reset_vec, sizeof(reset_vec));
/* copy in the config string */
cpu_physical_memory_write(memmap[SPIKE_MROM].base + sizeof(reset_vec),
config_string, config_string_len);
/* initialize HTIF using symbols found in load_kernel */
htif_mm_init(system_memory, boot_rom, &s->soc.harts[0].env, serial_hds[0]);
/* Core Local Interruptor (timer and IPI) */
sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE);
}
static const TypeInfo spike_v_1_09_1_device = {
.name = TYPE_RISCV_SPIKE_V1_09_1_BOARD,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SpikeState),
};
static const TypeInfo spike_v_1_10_0_device = {
.name = TYPE_RISCV_SPIKE_V1_10_0_BOARD,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SpikeState),
};
static void spike_v1_09_1_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Spike Board (Privileged ISA v1.9.1)";
mc->init = spike_v1_09_1_board_init;
mc->max_cpus = 1;
}
static void spike_v1_10_0_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Spike Board (Privileged ISA v1.10)";
mc->init = spike_v1_10_0_board_init;
mc->max_cpus = 1;
mc->is_default = 1;
}
DEFINE_MACHINE("spike_v1.9.1", spike_v1_09_1_machine_init)
DEFINE_MACHINE("spike_v1.10", spike_v1_10_0_machine_init)
static void riscv_spike_board_register_types(void)
{
type_register_static(&spike_v_1_09_1_device);
type_register_static(&spike_v_1_10_0_device);
}
type_init(riscv_spike_board_register_types);

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hw/riscv/virt.c Normal file
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/*
* QEMU RISC-V VirtIO Board
*
* Copyright (c) 2017 SiFive, Inc.
*
* RISC-V machine with 16550a UART and VirtIO MMIO
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "hw/sysbus.h"
#include "hw/char/serial.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/riscv_htif.h"
#include "hw/riscv/riscv_hart.h"
#include "hw/riscv/sifive_plic.h"
#include "hw/riscv/sifive_clint.h"
#include "hw/riscv/sifive_test.h"
#include "hw/riscv/virt.h"
#include "chardev/char.h"
#include "sysemu/arch_init.h"
#include "sysemu/device_tree.h"
#include "exec/address-spaces.h"
#include "elf.h"
static const struct MemmapEntry {
hwaddr base;
hwaddr size;
} virt_memmap[] = {
[VIRT_DEBUG] = { 0x0, 0x100 },
[VIRT_MROM] = { 0x1000, 0x2000 },
[VIRT_TEST] = { 0x4000, 0x1000 },
[VIRT_CLINT] = { 0x2000000, 0x10000 },
[VIRT_PLIC] = { 0xc000000, 0x4000000 },
[VIRT_UART0] = { 0x10000000, 0x100 },
[VIRT_VIRTIO] = { 0x10001000, 0x1000 },
[VIRT_DRAM] = { 0x80000000, 0x0 },
};
static void copy_le32_to_phys(hwaddr pa, uint32_t *rom, size_t len)
{
int i;
for (i = 0; i < (len >> 2); i++) {
stl_phys(&address_space_memory, pa + (i << 2), rom[i]);
}
}
static uint64_t identity_translate(void *opaque, uint64_t addr)
{
return addr;
}
static uint64_t load_kernel(const char *kernel_filename)
{
uint64_t kernel_entry, kernel_high;
if (load_elf(kernel_filename, identity_translate, NULL,
&kernel_entry, NULL, &kernel_high,
0, ELF_MACHINE, 1, 0) < 0) {
error_report("qemu: could not load kernel '%s'", kernel_filename);
exit(1);
}
return kernel_entry;
}
static hwaddr load_initrd(const char *filename, uint64_t mem_size,
uint64_t kernel_entry, hwaddr *start)
{
int size;
/* We want to put the initrd far enough into RAM that when the
* kernel is uncompressed it will not clobber the initrd. However
* on boards without much RAM we must ensure that we still leave
* enough room for a decent sized initrd, and on boards with large
* amounts of RAM we must avoid the initrd being so far up in RAM
* that it is outside lowmem and inaccessible to the kernel.
* So for boards with less than 256MB of RAM we put the initrd
* halfway into RAM, and for boards with 256MB of RAM or more we put
* the initrd at 128MB.
*/
*start = kernel_entry + MIN(mem_size / 2, 128 * 1024 * 1024);
size = load_ramdisk(filename, *start, mem_size - *start);
if (size == -1) {
size = load_image_targphys(filename, *start, mem_size - *start);
if (size == -1) {
error_report("qemu: could not load ramdisk '%s'", filename);
exit(1);
}
}
return *start + size;
}
static void *create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap,
uint64_t mem_size, const char *cmdline)
{
void *fdt;
int cpu;
uint32_t *cells;
char *nodename;
uint32_t plic_phandle, phandle = 1;
int i;
fdt = s->fdt = create_device_tree(&s->fdt_size);
if (!fdt) {
error_report("create_device_tree() failed");
exit(1);
}
qemu_fdt_setprop_string(fdt, "/", "model", "riscv-virtio,qemu");
qemu_fdt_setprop_string(fdt, "/", "compatible", "riscv-virtio");
qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x2);
qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x2);
qemu_fdt_add_subnode(fdt, "/soc");
qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0);
qemu_fdt_setprop_string(fdt, "/soc", "compatible", "riscv-virtio-soc");
qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x2);
qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2);
nodename = g_strdup_printf("/memory@%lx",
(long)memmap[VIRT_DRAM].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_cells(fdt, nodename, "reg",
memmap[VIRT_DRAM].base >> 32, memmap[VIRT_DRAM].base,
mem_size >> 32, mem_size);
qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
g_free(nodename);
qemu_fdt_add_subnode(fdt, "/cpus");
qemu_fdt_setprop_cell(fdt, "/cpus", "timebase-frequency", 10000000);
qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
for (cpu = s->soc.num_harts - 1; cpu >= 0; cpu--) {
int cpu_phandle = phandle++;
nodename = g_strdup_printf("/cpus/cpu@%d", cpu);
char *intc = g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
char *isa = riscv_isa_string(&s->soc.harts[cpu]);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_cell(fdt, nodename, "clock-frequency", 1000000000);
qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv48");
qemu_fdt_setprop_string(fdt, nodename, "riscv,isa", isa);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv");
qemu_fdt_setprop_string(fdt, nodename, "status", "okay");
qemu_fdt_setprop_cell(fdt, nodename, "reg", cpu);
qemu_fdt_setprop_string(fdt, nodename, "device_type", "cpu");
qemu_fdt_add_subnode(fdt, intc);
qemu_fdt_setprop_cell(fdt, intc, "phandle", cpu_phandle);
qemu_fdt_setprop_cell(fdt, intc, "linux,phandle", cpu_phandle);
qemu_fdt_setprop_string(fdt, intc, "compatible", "riscv,cpu-intc");
qemu_fdt_setprop(fdt, intc, "interrupt-controller", NULL, 0);
qemu_fdt_setprop_cell(fdt, intc, "#interrupt-cells", 1);
g_free(isa);
g_free(intc);
g_free(nodename);
}
cells = g_new0(uint32_t, s->soc.num_harts * 4);
for (cpu = 0; cpu < s->soc.num_harts; cpu++) {
nodename =
g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
uint32_t intc_phandle = qemu_fdt_get_phandle(fdt, nodename);
cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_SOFT);
cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 3] = cpu_to_be32(IRQ_M_TIMER);
g_free(nodename);
}
nodename = g_strdup_printf("/soc/clint@%lx",
(long)memmap[VIRT_CLINT].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,clint0");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[VIRT_CLINT].base,
0x0, memmap[VIRT_CLINT].size);
qemu_fdt_setprop(fdt, nodename, "interrupts-extended",
cells, s->soc.num_harts * sizeof(uint32_t) * 4);
g_free(cells);
g_free(nodename);
plic_phandle = phandle++;
cells = g_new0(uint32_t, s->soc.num_harts * 4);
for (cpu = 0; cpu < s->soc.num_harts; cpu++) {
nodename =
g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
uint32_t intc_phandle = qemu_fdt_get_phandle(fdt, nodename);
cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_EXT);
cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT);
g_free(nodename);
}
nodename = g_strdup_printf("/soc/interrupt-controller@%lx",
(long)memmap[VIRT_PLIC].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_cell(fdt, nodename, "#interrupt-cells", 1);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,plic0");
qemu_fdt_setprop(fdt, nodename, "interrupt-controller", NULL, 0);
qemu_fdt_setprop(fdt, nodename, "interrupts-extended",
cells, s->soc.num_harts * sizeof(uint32_t) * 4);
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[VIRT_PLIC].base,
0x0, memmap[VIRT_PLIC].size);
qemu_fdt_setprop_string(fdt, nodename, "reg-names", "control");
qemu_fdt_setprop_cell(fdt, nodename, "riscv,max-priority", 7);
qemu_fdt_setprop_cell(fdt, nodename, "riscv,ndev", VIRTIO_NDEV);
qemu_fdt_setprop_cells(fdt, nodename, "phandle", plic_phandle);
qemu_fdt_setprop_cells(fdt, nodename, "linux,phandle", plic_phandle);
plic_phandle = qemu_fdt_get_phandle(fdt, nodename);
g_free(cells);
g_free(nodename);
for (i = 0; i < VIRTIO_COUNT; i++) {
nodename = g_strdup_printf("/virtio_mmio@%lx",
(long)(memmap[VIRT_VIRTIO].base + i * memmap[VIRT_VIRTIO].size));
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "virtio,mmio");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[VIRT_VIRTIO].base + i * memmap[VIRT_VIRTIO].size,
0x0, memmap[VIRT_VIRTIO].size);
qemu_fdt_setprop_cells(fdt, nodename, "interrupt-parent", plic_phandle);
qemu_fdt_setprop_cells(fdt, nodename, "interrupts", VIRTIO_IRQ + i);
g_free(nodename);
}
nodename = g_strdup_printf("/test@%lx",
(long)memmap[VIRT_TEST].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "sifive,test0");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[VIRT_TEST].base,
0x0, memmap[VIRT_TEST].size);
nodename = g_strdup_printf("/uart@%lx",
(long)memmap[VIRT_UART0].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "ns16550a");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[VIRT_UART0].base,
0x0, memmap[VIRT_UART0].size);
qemu_fdt_setprop_cell(fdt, nodename, "clock-frequency", 3686400);
qemu_fdt_setprop_cells(fdt, nodename, "interrupt-parent", plic_phandle);
qemu_fdt_setprop_cells(fdt, nodename, "interrupts", UART0_IRQ);
qemu_fdt_add_subnode(fdt, "/chosen");
qemu_fdt_setprop_string(fdt, "/chosen", "stdout-path", nodename);
qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
g_free(nodename);
return fdt;
}
static void riscv_virt_board_init(MachineState *machine)
{
const struct MemmapEntry *memmap = virt_memmap;
RISCVVirtState *s = g_new0(RISCVVirtState, 1);
MemoryRegion *system_memory = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
MemoryRegion *boot_rom = g_new(MemoryRegion, 1);
char *plic_hart_config;
size_t plic_hart_config_len;
int i;
void *fdt;
/* Initialize SOC */
object_initialize(&s->soc, sizeof(s->soc), TYPE_RISCV_HART_ARRAY);
object_property_add_child(OBJECT(machine), "soc", OBJECT(&s->soc),
&error_abort);
object_property_set_str(OBJECT(&s->soc), VIRT_CPU, "cpu-type",
&error_abort);
object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
&error_abort);
object_property_set_bool(OBJECT(&s->soc), true, "realized",
&error_abort);
/* register system main memory (actual RAM) */
memory_region_init_ram(main_mem, NULL, "riscv_virt_board.ram",
machine->ram_size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[VIRT_DRAM].base,
main_mem);
/* create device tree */
fdt = create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
/* boot rom */
memory_region_init_ram(boot_rom, NULL, "riscv_virt_board.bootrom",
s->fdt_size + 0x2000, &error_fatal);
memory_region_add_subregion(system_memory, 0x0, boot_rom);
if (machine->kernel_filename) {
uint64_t kernel_entry = load_kernel(machine->kernel_filename);
if (machine->initrd_filename) {
hwaddr start;
hwaddr end = load_initrd(machine->initrd_filename,
machine->ram_size, kernel_entry,
&start);
qemu_fdt_setprop_cell(fdt, "/chosen",
"linux,initrd-start", start);
qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
end);
}
}
/* reset vector */
uint32_t reset_vec[8] = {
0x00000297, /* 1: auipc t0, %pcrel_hi(dtb) */
0x02028593, /* addi a1, t0, %pcrel_lo(1b) */
0xf1402573, /* csrr a0, mhartid */
#if defined(TARGET_RISCV32)
0x0182a283, /* lw t0, 24(t0) */
#elif defined(TARGET_RISCV64)
0x0182b283, /* ld t0, 24(t0) */
#endif
0x00028067, /* jr t0 */
0x00000000,
memmap[VIRT_DRAM].base, /* start: .dword memmap[VIRT_DRAM].base */
0x00000000,
/* dtb: */
};
/* copy in the reset vector */
copy_le32_to_phys(ROM_BASE, reset_vec, sizeof(reset_vec));
/* copy in the device tree */
qemu_fdt_dumpdtb(s->fdt, s->fdt_size);
cpu_physical_memory_write(ROM_BASE + sizeof(reset_vec),
s->fdt, s->fdt_size);
/* create PLIC hart topology configuration string */
plic_hart_config_len = (strlen(VIRT_PLIC_HART_CONFIG) + 1) * smp_cpus;
plic_hart_config = g_malloc0(plic_hart_config_len);
for (i = 0; i < smp_cpus; i++) {
if (i != 0) {
strncat(plic_hart_config, ",", plic_hart_config_len);
}
strncat(plic_hart_config, VIRT_PLIC_HART_CONFIG, plic_hart_config_len);
plic_hart_config_len -= (strlen(VIRT_PLIC_HART_CONFIG) + 1);
}
/* MMIO */
s->plic = sifive_plic_create(memmap[VIRT_PLIC].base,
plic_hart_config,
VIRT_PLIC_NUM_SOURCES,
VIRT_PLIC_NUM_PRIORITIES,
VIRT_PLIC_PRIORITY_BASE,
VIRT_PLIC_PENDING_BASE,
VIRT_PLIC_ENABLE_BASE,
VIRT_PLIC_ENABLE_STRIDE,
VIRT_PLIC_CONTEXT_BASE,
VIRT_PLIC_CONTEXT_STRIDE,
memmap[VIRT_PLIC].size);
sifive_clint_create(memmap[VIRT_CLINT].base,
memmap[VIRT_CLINT].size, smp_cpus,
SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE);
sifive_test_create(memmap[VIRT_TEST].base);
for (i = 0; i < VIRTIO_COUNT; i++) {
sysbus_create_simple("virtio-mmio",
memmap[VIRT_VIRTIO].base + i * memmap[VIRT_VIRTIO].size,
SIFIVE_PLIC(s->plic)->irqs[VIRTIO_IRQ + i]);
}
serial_mm_init(system_memory, memmap[VIRT_UART0].base,
0, SIFIVE_PLIC(s->plic)->irqs[UART0_IRQ], 399193,
serial_hds[0], DEVICE_LITTLE_ENDIAN);
}
static int riscv_virt_board_sysbus_device_init(SysBusDevice *sysbusdev)
{
return 0;
}
static void riscv_virt_board_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = riscv_virt_board_sysbus_device_init;
}
static const TypeInfo riscv_virt_board_device = {
.name = TYPE_RISCV_VIRT_BOARD,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(RISCVVirtState),
.class_init = riscv_virt_board_class_init,
};
static void riscv_virt_board_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V VirtIO Board (Privileged spec v1.10)";
mc->init = riscv_virt_board_init;
mc->max_cpus = 8; /* hardcoded limit in BBL */
}
DEFINE_MACHINE("virt", riscv_virt_board_machine_init)
static void riscv_virt_board_register_types(void)
{
type_register_static(&riscv_virt_board_device);
}
type_init(riscv_virt_board_register_types);

2
include/disas/bfd.h
View File

@ -429,6 +429,8 @@ int print_insn_lm32 (bfd_vma, disassemble_info*);
int print_insn_big_nios2 (bfd_vma, disassemble_info*);
int print_insn_little_nios2 (bfd_vma, disassemble_info*);
int print_insn_xtensa (bfd_vma, disassemble_info*);
int print_insn_riscv32 (bfd_vma, disassemble_info*);
int print_insn_riscv64 (bfd_vma, disassemble_info*);
#if 0
/* Fetch the disassembler for a given BFD, if that support is available. */

2
include/elf.h
View File

@ -119,6 +119,8 @@ typedef int64_t Elf64_Sxword;
#define EM_UNICORE32 110 /* UniCore32 */
#define EM_RISCV 243 /* RISC-V */
/*
* This is an interim value that we will use until the committee comes
* up with a final number.

34
include/hw/elf_ops.h
View File

@ -105,7 +105,7 @@ static int glue(symcmp, SZ)(const void *s0, const void *s1)
}
static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab,
int clear_lsb)
int clear_lsb, symbol_fn_t sym_cb)
{
struct elf_shdr *symtab, *strtab, *shdr_table = NULL;
struct elf_sym *syms = NULL;
@ -133,10 +133,26 @@ static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab,
nsyms = symtab->sh_size / sizeof(struct elf_sym);
/* String table */
if (symtab->sh_link >= ehdr->e_shnum) {
goto fail;
}
strtab = &shdr_table[symtab->sh_link];
str = load_at(fd, strtab->sh_offset, strtab->sh_size);
if (!str) {
goto fail;
}
i = 0;
while (i < nsyms) {
if (must_swab)
if (must_swab) {
glue(bswap_sym, SZ)(&syms[i]);
}
if (sym_cb) {
sym_cb(str + syms[i].st_name, syms[i].st_info,
syms[i].st_value, syms[i].st_size);
}
/* We are only interested in function symbols.
Throw everything else away. */
if (syms[i].st_shndx == SHN_UNDEF ||
@ -163,15 +179,6 @@ static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab,
}
}
/* String table */
if (symtab->sh_link >= ehdr->e_shnum)
goto fail;
strtab = &shdr_table[symtab->sh_link];
str = load_at(fd, strtab->sh_offset, strtab->sh_size);
if (!str)
goto fail;
/* Commit */
s = g_malloc0(sizeof(*s));
s->lookup_symbol = glue(lookup_symbol, SZ);
@ -264,7 +271,8 @@ static int glue(load_elf, SZ)(const char *name, int fd,
int must_swab, uint64_t *pentry,
uint64_t *lowaddr, uint64_t *highaddr,
int elf_machine, int clear_lsb, int data_swab,
AddressSpace *as, bool load_rom)
AddressSpace *as, bool load_rom,
symbol_fn_t sym_cb)
{
struct elfhdr ehdr;
struct elf_phdr *phdr = NULL, *ph;
@ -329,7 +337,7 @@ static int glue(load_elf, SZ)(const char *name, int fd,
if (pentry)
*pentry = (uint64_t)(elf_sword)ehdr.e_entry;
glue(load_symbols, SZ)(&ehdr, fd, must_swab, clear_lsb);
glue(load_symbols, SZ)(&ehdr, fd, must_swab, clear_lsb, sym_cb);
size = ehdr.e_phnum * sizeof(phdr[0]);
if (lseek(fd, ehdr.e_phoff, SEEK_SET) != ehdr.e_phoff) {

17
include/hw/loader.h
View File

@ -64,7 +64,7 @@ int load_image_gzipped(const char *filename, hwaddr addr, uint64_t max_sz);
#define ELF_LOAD_WRONG_ENDIAN -4
const char *load_elf_strerror(int error);
/** load_elf_ram:
/** load_elf_ram_sym:
* @filename: Path of ELF file
* @translate_fn: optional function to translate load addresses
* @translate_opaque: opaque data passed to @translate_fn
@ -81,6 +81,7 @@ const char *load_elf_strerror(int error);
* @as: The AddressSpace to load the ELF to. The value of address_space_memory
* is used if nothing is supplied here.
* @load_rom : Load ELF binary as ROM
* @sym_cb: Callback function for symbol table entries
*
* Load an ELF file's contents to the emulated system's address space.
* Clients may optionally specify a callback to perform address
@ -93,6 +94,20 @@ const char *load_elf_strerror(int error);
* If @elf_machine is EM_NONE then the machine type will be read from the
* ELF header and no checks will be carried out against the machine type.
*/
typedef void (*symbol_fn_t)(const char *st_name, int st_info,
uint64_t st_value, uint64_t st_size);
int load_elf_ram_sym(const char *filename,
uint64_t (*translate_fn)(void *, uint64_t),
void *translate_opaque, uint64_t *pentry,
uint64_t *lowaddr, uint64_t *highaddr, int big_endian,
int elf_machine, int clear_lsb, int data_swab,
AddressSpace *as, bool load_rom, symbol_fn_t sym_cb);
/** load_elf_ram:
* Same as load_elf_ram_sym(), but doesn't allow the caller to specify a
* symbol callback function
*/
int load_elf_ram(const char *filename,
uint64_t (*translate_fn)(void *, uint64_t),
void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,

39
include/hw/riscv/riscv_hart.h Normal file
View File

@ -0,0 +1,39 @@
/*
* QEMU RISC-V Hart Array interface
*
* Copyright (c) 2017 SiFive, Inc.
*
* Holds the state of a heterogenous array of RISC-V harts
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_RISCV_HART_H
#define HW_RISCV_HART_H
#define TYPE_RISCV_HART_ARRAY "riscv.hart_array"
#define RISCV_HART_ARRAY(obj) \
OBJECT_CHECK(RISCVHartArrayState, (obj), TYPE_RISCV_HART_ARRAY)
typedef struct RISCVHartArrayState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
uint32_t num_harts;
char *cpu_type;
RISCVCPU *harts;
} RISCVHartArrayState;
#endif

61
include/hw/riscv/riscv_htif.h Normal file
View File

@ -0,0 +1,61 @@
/*
* QEMU RISCV Host Target Interface (HTIF) Emulation
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017-2018 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_RISCV_HTIF_H
#define HW_RISCV_HTIF_H
#include "hw/hw.h"
#include "chardev/char.h"
#include "chardev/char-fe.h"
#include "sysemu/sysemu.h"
#include "exec/memory.h"
#include "target/riscv/cpu.h"
#define TYPE_HTIF_UART "riscv.htif.uart"
typedef struct HTIFState {
int allow_tohost;
int fromhost_inprogress;
hwaddr tohost_offset;
hwaddr fromhost_offset;
uint64_t tohost_size;
uint64_t fromhost_size;
MemoryRegion mmio;
MemoryRegion *address_space;
MemoryRegion *main_mem;
void *main_mem_ram_ptr;
CPURISCVState *env;
CharBackend chr;
uint64_t pending_read;
} HTIFState;
extern const VMStateDescription vmstate_htif;
extern const MemoryRegionOps htif_io_ops;
/* HTIF symbol callback */
void htif_symbol_callback(const char *st_name, int st_info, uint64_t st_value,
uint64_t st_size);
/* legacy pre qom */
HTIFState *htif_mm_init(MemoryRegion *address_space, MemoryRegion *main_mem,
CPURISCVState *env, Chardev *chr);
#endif

50
include/hw/riscv/sifive_clint.h Normal file
View File

@ -0,0 +1,50 @@
/*
* SiFive CLINT (Core Local Interruptor) interface
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_SIFIVE_CLINT_H
#define HW_SIFIVE_CLINT_H
#define TYPE_SIFIVE_CLINT "riscv.sifive.clint"
#define SIFIVE_CLINT(obj) \
OBJECT_CHECK(SiFiveCLINTState, (obj), TYPE_SIFIVE_CLINT)
typedef struct SiFiveCLINTState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
MemoryRegion mmio;
uint32_t num_harts;
uint32_t sip_base;
uint32_t timecmp_base;
uint32_t time_base;
uint32_t aperture_size;
} SiFiveCLINTState;
DeviceState *sifive_clint_create(hwaddr addr, hwaddr size, uint32_t num_harts,
uint32_t sip_base, uint32_t timecmp_base, uint32_t time_base);
enum {
SIFIVE_SIP_BASE = 0x0,
SIFIVE_TIMECMP_BASE = 0x4000,
SIFIVE_TIME_BASE = 0xBFF8
};
#endif

79
include/hw/riscv/sifive_e.h Normal file
View File

@ -0,0 +1,79 @@
/*
* SiFive E series machine interface
*
* Copyright (c) 2017 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_SIFIVE_E_H
#define HW_SIFIVE_E_H
#define TYPE_SIFIVE_E "riscv.sifive_e"
#define SIFIVE_E(obj) \
OBJECT_CHECK(SiFiveEState, (obj), TYPE_SIFIVE_E)
typedef struct SiFiveEState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
RISCVHartArrayState soc;
DeviceState *plic;
} SiFiveEState;
enum {
SIFIVE_E_DEBUG,
SIFIVE_E_MROM,
SIFIVE_E_OTP,
SIFIVE_E_CLINT,
SIFIVE_E_PLIC,
SIFIVE_E_AON,
SIFIVE_E_PRCI,
SIFIVE_E_OTP_CTRL,
SIFIVE_E_GPIO0,
SIFIVE_E_UART0,
SIFIVE_E_QSPI0,
SIFIVE_E_PWM0,
SIFIVE_E_UART1,
SIFIVE_E_QSPI1,
SIFIVE_E_PWM1,
SIFIVE_E_QSPI2,
SIFIVE_E_PWM2,
SIFIVE_E_XIP,
SIFIVE_E_DTIM
};
enum {
SIFIVE_E_UART0_IRQ = 3,
SIFIVE_E_UART1_IRQ = 4
};
#define SIFIVE_E_PLIC_HART_CONFIG "M"
#define SIFIVE_E_PLIC_NUM_SOURCES 127
#define SIFIVE_E_PLIC_NUM_PRIORITIES 7
#define SIFIVE_E_PLIC_PRIORITY_BASE 0x0
#define SIFIVE_E_PLIC_PENDING_BASE 0x1000
#define SIFIVE_E_PLIC_ENABLE_BASE 0x2000
#define SIFIVE_E_PLIC_ENABLE_STRIDE 0x80
#define SIFIVE_E_PLIC_CONTEXT_BASE 0x200000
#define SIFIVE_E_PLIC_CONTEXT_STRIDE 0x1000
#if defined(TARGET_RISCV32)
#define SIFIVE_E_CPU TYPE_RISCV_CPU_SIFIVE_E31
#elif defined(TARGET_RISCV64)
#define SIFIVE_E_CPU TYPE_RISCV_CPU_SIFIVE_E51
#endif
#endif

85
include/hw/riscv/sifive_plic.h Normal file
View File

@ -0,0 +1,85 @@
/*
* SiFive PLIC (Platform Level Interrupt Controller) interface
*
* Copyright (c) 2017 SiFive, Inc.
*
* This provides a RISC-V PLIC device
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_SIFIVE_PLIC_H
#define HW_SIFIVE_PLIC_H
#include "hw/irq.h"
#define TYPE_SIFIVE_PLIC "riscv.sifive.plic"
#define SIFIVE_PLIC(obj) \
OBJECT_CHECK(SiFivePLICState, (obj), TYPE_SIFIVE_PLIC)
typedef enum PLICMode {
PLICMode_U,
PLICMode_S,
PLICMode_H,
PLICMode_M
} PLICMode;
typedef struct PLICAddr {
uint32_t addrid;
uint32_t hartid;
PLICMode mode;
} PLICAddr;
typedef struct SiFivePLICState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
MemoryRegion mmio;
uint32_t num_addrs;
uint32_t bitfield_words;
PLICAddr *addr_config;
uint32_t *source_priority;
uint32_t *target_priority;
uint32_t *pending;
uint32_t *claimed;
uint32_t *enable;
QemuMutex lock;
qemu_irq *irqs;
/* config */
char *hart_config;
uint32_t num_sources;
uint32_t num_priorities;
uint32_t priority_base;
uint32_t pending_base;
uint32_t enable_base;
uint32_t enable_stride;
uint32_t context_base;
uint32_t context_stride;
uint32_t aperture_size;
} SiFivePLICState;
void sifive_plic_raise_irq(SiFivePLICState *plic, uint32_t irq);
void sifive_plic_lower_irq(SiFivePLICState *plic, uint32_t irq);
DeviceState *sifive_plic_create(hwaddr addr, char *hart_config,
uint32_t num_sources, uint32_t num_priorities,
uint32_t priority_base, uint32_t pending_base,
uint32_t enable_base, uint32_t enable_stride,
uint32_t context_base, uint32_t context_stride,
uint32_t aperture_size);
#endif

37
include/hw/riscv/sifive_prci.h Normal file
View File

@ -0,0 +1,37 @@
/*
* QEMU SiFive PRCI (Power, Reset, Clock, Interrupt) interface
*
* Copyright (c) 2017 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_SIFIVE_PRCI_H
#define HW_SIFIVE_PRCI_H
#define TYPE_SIFIVE_PRCI "riscv.sifive.prci"
#define SIFIVE_PRCI(obj) \
OBJECT_CHECK(SiFivePRCIState, (obj), TYPE_SIFIVE_PRCI)
typedef struct SiFivePRCIState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
MemoryRegion mmio;
} SiFivePRCIState;
DeviceState *sifive_prci_create(hwaddr addr);
#endif

42
include/hw/riscv/sifive_test.h Normal file
View File

@ -0,0 +1,42 @@
/*
* QEMU Test Finisher interface
*
* Copyright (c) 2018 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_SIFIVE_TEST_H
#define HW_SIFIVE_TEST_H
#define TYPE_SIFIVE_TEST "riscv.sifive.test"
#define SIFIVE_TEST(obj) \
OBJECT_CHECK(SiFiveTestState, (obj), TYPE_SIFIVE_TEST)
typedef struct SiFiveTestState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
MemoryRegion mmio;
} SiFiveTestState;
enum {
FINISHER_FAIL = 0x3333,
FINISHER_PASS = 0x5555
};
DeviceState *sifive_test_create(hwaddr addr);
#endif

69
include/hw/riscv/sifive_u.h Normal file
View File

@ -0,0 +1,69 @@
/*
* SiFive U series machine interface
*
* Copyright (c) 2017 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_SIFIVE_U_H
#define HW_SIFIVE_U_H
#define TYPE_SIFIVE_U "riscv.sifive_u"
#define SIFIVE_U(obj) \
OBJECT_CHECK(SiFiveUState, (obj), TYPE_SIFIVE_U)
typedef struct SiFiveUState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
RISCVHartArrayState soc;
DeviceState *plic;
void *fdt;
int fdt_size;
} SiFiveUState;
enum {
SIFIVE_U_DEBUG,
SIFIVE_U_MROM,
SIFIVE_U_CLINT,
SIFIVE_U_PLIC,
SIFIVE_U_UART0,
SIFIVE_U_UART1,
SIFIVE_U_DRAM
};
enum {
SIFIVE_U_UART0_IRQ = 3,
SIFIVE_U_UART1_IRQ = 4
};
#define SIFIVE_U_PLIC_HART_CONFIG "MS"
#define SIFIVE_U_PLIC_NUM_SOURCES 127
#define SIFIVE_U_PLIC_NUM_PRIORITIES 7
#define SIFIVE_U_PLIC_PRIORITY_BASE 0x0
#define SIFIVE_U_PLIC_PENDING_BASE 0x1000
#define SIFIVE_U_PLIC_ENABLE_BASE 0x2000
#define SIFIVE_U_PLIC_ENABLE_STRIDE 0x80
#define SIFIVE_U_PLIC_CONTEXT_BASE 0x200000
#define SIFIVE_U_PLIC_CONTEXT_STRIDE 0x1000
#if defined(TARGET_RISCV32)
#define SIFIVE_U_CPU TYPE_RISCV_CPU_SIFIVE_U34
#elif defined(TARGET_RISCV64)
#define SIFIVE_U_CPU TYPE_RISCV_CPU_SIFIVE_U54
#endif
#endif

71
include/hw/riscv/sifive_uart.h Normal file
View File

@ -0,0 +1,71 @@
/*
* SiFive UART interface
*
* Copyright (c) 2016 Stefan O'Rear
* Copyright (c) 2017 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_SIFIVE_UART_H
#define HW_SIFIVE_UART_H
enum {
SIFIVE_UART_TXFIFO = 0,
SIFIVE_UART_RXFIFO = 4,
SIFIVE_UART_TXCTRL = 8,
SIFIVE_UART_TXMARK = 10,
SIFIVE_UART_RXCTRL = 12,
SIFIVE_UART_RXMARK = 14,
SIFIVE_UART_IE = 16,
SIFIVE_UART_IP = 20,
SIFIVE_UART_DIV = 24,
SIFIVE_UART_MAX = 32
};
enum {
SIFIVE_UART_IE_TXWM = 1, /* Transmit watermark interrupt enable */
SIFIVE_UART_IE_RXWM = 2 /* Receive watermark interrupt enable */
};
enum {
SIFIVE_UART_IP_TXWM = 1, /* Transmit watermark interrupt pending */
SIFIVE_UART_IP_RXWM = 2 /* Receive watermark interrupt pending */
};
#define TYPE_SIFIVE_UART "riscv.sifive.uart"
#define SIFIVE_UART(obj) \
OBJECT_CHECK(SiFiveUARTState, (obj), TYPE_SIFIVE_UART)
typedef struct SiFiveUARTState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
qemu_irq irq;
MemoryRegion mmio;
CharBackend chr;
uint8_t rx_fifo[8];
unsigned int rx_fifo_len;
uint32_t ie;
uint32_t ip;
uint32_t txctrl;
uint32_t rxctrl;
uint32_t div;
} SiFiveUARTState;
SiFiveUARTState *sifive_uart_create(MemoryRegion *address_space, hwaddr base,
Chardev *chr, qemu_irq irq);
#endif

53
include/hw/riscv/spike.h Normal file
View File

@ -0,0 +1,53 @@
/*
* Spike machine interface
*
* Copyright (c) 2017 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_SPIKE_H
#define HW_SPIKE_H
#define TYPE_RISCV_SPIKE_V1_09_1_BOARD "riscv.spike_v1_9_1"
#define TYPE_RISCV_SPIKE_V1_10_0_BOARD "riscv.spike_v1_10"
#define SPIKE(obj) \
OBJECT_CHECK(SpikeState, (obj), TYPE_RISCV_SPIKE_BOARD)
typedef struct {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
RISCVHartArrayState soc;
void *fdt;
int fdt_size;
} SpikeState;
enum {
SPIKE_MROM,
SPIKE_CLINT,
SPIKE_DRAM
};
#if defined(TARGET_RISCV32)
#define SPIKE_V1_09_1_CPU TYPE_RISCV_CPU_RV32GCSU_V1_09_1
#define SPIKE_V1_10_0_CPU TYPE_RISCV_CPU_RV32GCSU_V1_10_0
#elif defined(TARGET_RISCV64)
#define SPIKE_V1_09_1_CPU TYPE_RISCV_CPU_RV64GCSU_V1_09_1
#define SPIKE_V1_10_0_CPU TYPE_RISCV_CPU_RV64GCSU_V1_10_0
#endif
#endif

74
include/hw/riscv/virt.h Normal file
View File

@ -0,0 +1,74 @@
/*
* SiFive VirtIO Board
*
* Copyright (c) 2017 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_VIRT_H
#define HW_VIRT_H
#define TYPE_RISCV_VIRT_BOARD "riscv.virt"
#define VIRT(obj) \
OBJECT_CHECK(RISCVVirtState, (obj), TYPE_RISCV_VIRT_BOARD)
enum { ROM_BASE = 0x1000 };
typedef struct {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
RISCVHartArrayState soc;
DeviceState *plic;
void *fdt;
int fdt_size;
} RISCVVirtState;
enum {
VIRT_DEBUG,
VIRT_MROM,
VIRT_TEST,
VIRT_CLINT,
VIRT_PLIC,
VIRT_UART0,
VIRT_VIRTIO,
VIRT_DRAM
};
enum {
UART0_IRQ = 10,
VIRTIO_IRQ = 1, /* 1 to 8 */
VIRTIO_COUNT = 8,
VIRTIO_NDEV = 10
};
#define VIRT_PLIC_HART_CONFIG "MS"
#define VIRT_PLIC_NUM_SOURCES 127
#define VIRT_PLIC_NUM_PRIORITIES 7
#define VIRT_PLIC_PRIORITY_BASE 0x0
#define VIRT_PLIC_PENDING_BASE 0x1000
#define VIRT_PLIC_ENABLE_BASE 0x2000
#define VIRT_PLIC_ENABLE_STRIDE 0x80
#define VIRT_PLIC_CONTEXT_BASE 0x200000
#define VIRT_PLIC_CONTEXT_STRIDE 0x1000
#if defined(TARGET_RISCV32)
#define VIRT_CPU TYPE_RISCV_CPU_RV32GCSU_V1_10_0
#elif defined(TARGET_RISCV64)
#define VIRT_CPU TYPE_RISCV_CPU_RV64GCSU_V1_10_0
#endif
#endif

1
include/sysemu/arch_init.h
View File

@ -24,6 +24,7 @@ enum {
QEMU_ARCH_TRICORE = (1 << 16),
QEMU_ARCH_NIOS2 = (1 << 17),
QEMU_ARCH_HPPA = (1 << 18),
QEMU_ARCH_RISCV = (1 << 19),
};
extern const uint32_t arch_type;

22
linux-user/elfload.c
View File

@ -1295,6 +1295,28 @@ static inline void init_thread(struct target_pt_regs *regs,
#endif /* TARGET_TILEGX */
#ifdef TARGET_RISCV
#define ELF_START_MMAP 0x80000000
#define ELF_ARCH EM_RISCV
#ifdef TARGET_RISCV32
#define ELF_CLASS ELFCLASS32
#else
#define ELF_CLASS ELFCLASS64
#endif
static inline void init_thread(struct target_pt_regs *regs,
struct image_info *infop)
{
regs->sepc = infop->entry;
regs->sp = infop->start_stack;
}
#define ELF_EXEC_PAGESIZE 4096
#endif /* TARGET_RISCV */
#ifdef TARGET_HPPA
#define ELF_START_MMAP 0x80000000

99
linux-user/main.c
View File

@ -3653,6 +3653,100 @@ void cpu_loop(CPUTLGState *env)
#endif
#ifdef TARGET_RISCV
void cpu_loop(CPURISCVState *env)
{
CPUState *cs = CPU(riscv_env_get_cpu(env));
int trapnr, signum, sigcode;
target_ulong sigaddr;
target_ulong ret;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
signum = 0;
sigcode = 0;
sigaddr = 0;
switch (trapnr) {
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
case RISCV_EXCP_U_ECALL:
env->pc += 4;
if (env->gpr[xA7] == TARGET_NR_arch_specific_syscall + 15) {
/* riscv_flush_icache_syscall is a no-op in QEMU as
self-modifying code is automatically detected */
ret = 0;
} else {
ret = do_syscall(env,
env->gpr[xA7],
env->gpr[xA0],
env->gpr[xA1],
env->gpr[xA2],
env->gpr[xA3],
env->gpr[xA4],
env->gpr[xA5],
0, 0);
}
if (ret == -TARGET_ERESTARTSYS) {
env->pc -= 4;
} else if (ret != -TARGET_QEMU_ESIGRETURN) {
env->gpr[xA0] = ret;
}
if (cs->singlestep_enabled) {
goto gdbstep;
}
break;
case RISCV_EXCP_ILLEGAL_INST:
signum = TARGET_SIGILL;
sigcode = TARGET_ILL_ILLOPC;
break;
case RISCV_EXCP_BREAKPOINT:
signum = TARGET_SIGTRAP;
sigcode = TARGET_TRAP_BRKPT;
sigaddr = env->pc;
break;
case RISCV_EXCP_INST_PAGE_FAULT:
case RISCV_EXCP_LOAD_PAGE_FAULT:
case RISCV_EXCP_STORE_PAGE_FAULT:
signum = TARGET_SIGSEGV;
sigcode = TARGET_SEGV_MAPERR;
break;
case EXCP_DEBUG:
gdbstep:
signum = gdb_handlesig(cs, TARGET_SIGTRAP);
sigcode = TARGET_TRAP_BRKPT;
break;
default:
EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n",
trapnr);
exit(EXIT_FAILURE);
}
if (signum) {
target_siginfo_t info = {
.si_signo = signum,
.si_errno = 0,
.si_code = sigcode,
._sifields._sigfault._addr = sigaddr
};
queue_signal(env, info.si_signo, QEMU_SI_KILL, &info);
}
process_pending_signals(env);
}
}
#endif /* TARGET_RISCV */
#ifdef TARGET_HPPA
static abi_ulong hppa_lws(CPUHPPAState *env)
@ -4803,6 +4897,11 @@ int main(int argc, char **argv, char **envp)
env->pc = regs->pc;
cpu_set_sr(env, regs->sr);
}
#elif defined(TARGET_RISCV)
{
env->pc = regs->sepc;
env->gpr[xSP] = regs->sp;
}
#elif defined(TARGET_SH4)
{
int i;

287
linux-user/riscv/syscall_nr.h Normal file
View File

@ -0,0 +1,287 @@
/*
* Syscall numbers from asm-generic, common for most
* of recently-added arches including RISC-V.
*/
#define TARGET_NR_io_setup 0
#define TARGET_NR_io_destroy 1
#define TARGET_NR_io_submit 2
#define TARGET_NR_io_cancel 3
#define TARGET_NR_io_getevents 4
#define TARGET_NR_setxattr 5
#define TARGET_NR_lsetxattr 6
#define TARGET_NR_fsetxattr 7
#define TARGET_NR_getxattr 8
#define TARGET_NR_lgetxattr 9
#define TARGET_NR_fgetxattr 10
#define TARGET_NR_listxattr 11
#define TARGET_NR_llistxattr 12
#define TARGET_NR_flistxattr 13
#define TARGET_NR_removexattr 14
#define TARGET_NR_lremovexattr 15
#define TARGET_NR_fremovexattr 16
#define TARGET_NR_getcwd 17
#define TARGET_NR_lookup_dcookie 18
#define TARGET_NR_eventfd2 19
#define TARGET_NR_epoll_create1 20
#define TARGET_NR_epoll_ctl 21
#define TARGET_NR_epoll_pwait 22
#define TARGET_NR_dup 23
#define TARGET_NR_dup3 24
#ifdef TARGET_RISCV32
#define TARGET_NR_fcntl64 25
#else
#define TARGET_NR_fcntl 25
#endif
#define TARGET_NR_inotify_init1 26
#define TARGET_NR_inotify_add_watch 27
#define TARGET_NR_inotify_rm_watch 28
#define TARGET_NR_ioctl 29
#define TARGET_NR_ioprio_set 30
#define TARGET_NR_ioprio_get 31
#define TARGET_NR_flock 32
#define TARGET_NR_mknodat 33
#define TARGET_NR_mkdirat 34
#define TARGET_NR_unlinkat 35
#define TARGET_NR_symlinkat 36
#define TARGET_NR_linkat 37
#define TARGET_NR_renameat 38
#define TARGET_NR_umount2 39
#define TARGET_NR_mount 40
#define TARGET_NR_pivot_root 41
#define TARGET_NR_nfsservctl 42
#define TARGET_NR_statfs 43
#define TARGET_NR_fstatfs 44
#define TARGET_NR_truncate 45
#define TARGET_NR_ftruncate 46
#define TARGET_NR_fallocate 47
#define TARGET_NR_faccessat 48
#define TARGET_NR_chdir 49
#define TARGET_NR_fchdir 50
#define TARGET_NR_chroot 51
#define TARGET_NR_fchmod 52
#define TARGET_NR_fchmodat 53
#define TARGET_NR_fchownat 54
#define TARGET_NR_fchown 55
#define TARGET_NR_openat 56
#define TARGET_NR_close 57
#define TARGET_NR_vhangup 58
#define TARGET_NR_pipe2 59
#define TARGET_NR_quotactl 60
#define TARGET_NR_getdents64 61
#define TARGET_NR_lseek 62
#define TARGET_NR_read 63
#define TARGET_NR_write 64
#define TARGET_NR_readv 65
#define TARGET_NR_writev 66
#define TARGET_NR_pread64 67
#define TARGET_NR_pwrite64 68
#define TARGET_NR_preadv 69
#define TARGET_NR_pwritev 70
#define TARGET_NR_sendfile 71
#define TARGET_NR_pselect6 72
#define TARGET_NR_ppoll 73
#define TARGET_NR_signalfd4 74
#define TARGET_NR_vmsplice 75
#define TARGET_NR_splice 76
#define TARGET_NR_tee 77
#define TARGET_NR_readlinkat 78
#define TARGET_NR_newfstatat 79
#define TARGET_NR_fstat 80
#define TARGET_NR_sync 81
#define TARGET_NR_fsync 82
#define TARGET_NR_fdatasync 83
#define TARGET_NR_sync_file_range 84
#define TARGET_NR_timerfd_create 85
#define TARGET_NR_timerfd_settime 86
#define TARGET_NR_timerfd_gettime 87
#define TARGET_NR_utimensat 88
#define TARGET_NR_acct 89
#define TARGET_NR_capget 90
#define TARGET_NR_capset 91
#define TARGET_NR_personality 92
#define TARGET_NR_exit 93
#define TARGET_NR_exit_group 94
#define TARGET_NR_waitid 95
#define TARGET_NR_set_tid_address 96
#define TARGET_NR_unshare 97
#define TARGET_NR_futex 98
#define TARGET_NR_set_robust_list 99
#define TARGET_NR_get_robust_list 100
#define TARGET_NR_nanosleep 101
#define TARGET_NR_getitimer 102
#define TARGET_NR_setitimer 103
#define TARGET_NR_kexec_load 104
#define TARGET_NR_init_module 105
#define TARGET_NR_delete_module 106
#define TARGET_NR_timer_create 107
#define TARGET_NR_timer_gettime 108
#define TARGET_NR_timer_getoverrun 109
#define TARGET_NR_timer_settime 110
#define TARGET_NR_timer_delete 111
#define TARGET_NR_clock_settime 112
#define TARGET_NR_clock_gettime 113
#define TARGET_NR_clock_getres 114
#define TARGET_NR_clock_nanosleep 115
#define TARGET_NR_syslog 116
#define TARGET_NR_ptrace 117
#define TARGET_NR_sched_setparam 118
#define TARGET_NR_sched_setscheduler 119
#define TARGET_NR_sched_getscheduler 120
#define TARGET_NR_sched_getparam 121
#define TARGET_NR_sched_setaffinity 122
#define TARGET_NR_sched_getaffinity 123
#define TARGET_NR_sched_yield 124
#define TARGET_NR_sched_get_priority_max 125
#define TARGET_NR_sched_get_priority_min 126
#define TARGET_NR_sched_rr_get_interval 127
#define TARGET_NR_restart_syscall 128
#define TARGET_NR_kill 129
#define TARGET_NR_tkill 130
#define TARGET_NR_tgkill 131
#define TARGET_NR_sigaltstack 132
#define TARGET_NR_rt_sigsuspend 133
#define TARGET_NR_rt_sigaction 134
#define TARGET_NR_rt_sigprocmask 135
#define TARGET_NR_rt_sigpending 136
#define TARGET_NR_rt_sigtimedwait 137
#define TARGET_NR_rt_sigqueueinfo 138
#define TARGET_NR_rt_sigreturn 139
#define TARGET_NR_setpriority 140
#define TARGET_NR_getpriority 141
#define TARGET_NR_reboot 142
#define TARGET_NR_setregid 143
#define TARGET_NR_setgid 144
#define TARGET_NR_setreuid 145
#define TARGET_NR_setuid 146
#define TARGET_NR_setresuid 147
#define TARGET_NR_getresuid 148
#define TARGET_NR_setresgid 149
#define TARGET_NR_getresgid 150
#define TARGET_NR_setfsuid 151
#define TARGET_NR_setfsgid 152
#define TARGET_NR_times 153
#define TARGET_NR_setpgid 154
#define TARGET_NR_getpgid 155
#define TARGET_NR_getsid 156
#define TARGET_NR_setsid 157
#define TARGET_NR_getgroups 158
#define TARGET_NR_setgroups 159
#define TARGET_NR_uname 160
#define TARGET_NR_sethostname 161
#define TARGET_NR_setdomainname 162
#define TARGET_NR_getrlimit 163
#define TARGET_NR_setrlimit 164
#define TARGET_NR_getrusage 165
#define TARGET_NR_umask 166
#define TARGET_NR_prctl 167
#define TARGET_NR_getcpu 168
#define TARGET_NR_gettimeofday 169
#define TARGET_NR_settimeofday 170
#define TARGET_NR_adjtimex 171
#define TARGET_NR_getpid 172
#define TARGET_NR_getppid 173
#define TARGET_NR_getuid 174
#define TARGET_NR_geteuid 175
#define TARGET_NR_getgid 176
#define TARGET_NR_getegid 177
#define TARGET_NR_gettid 178
#define TARGET_NR_sysinfo 179
#define TARGET_NR_mq_open 180
#define TARGET_NR_mq_unlink 181
#define TARGET_NR_mq_timedsend 182
#define TARGET_NR_mq_timedreceive 183
#define TARGET_NR_mq_notify 184
#define TARGET_NR_mq_getsetattr 185
#define TARGET_NR_msgget 186
#define TARGET_NR_msgctl 187
#define TARGET_NR_msgrcv 188
#define TARGET_NR_msgsnd 189
#define TARGET_NR_semget 190
#define TARGET_NR_semctl 191
#define TARGET_NR_semtimedop 192
#define TARGET_NR_semop 193
#define TARGET_NR_shmget 194
#define TARGET_NR_shmctl 195
#define TARGET_NR_shmat 196
#define TARGET_NR_shmdt 197
#define TARGET_NR_socket 198
#define TARGET_NR_socketpair 199
#define TARGET_NR_bind 200
#define TARGET_NR_listen 201
#define TARGET_NR_accept 202
#define TARGET_NR_connect 203
#define TARGET_NR_getsockname 204
#define TARGET_NR_getpeername 205
#define TARGET_NR_sendto 206
#define TARGET_NR_recvfrom 207
#define TARGET_NR_setsockopt 208
#define TARGET_NR_getsockopt 209
#define TARGET_NR_shutdown 210
#define TARGET_NR_sendmsg 211
#define TARGET_NR_recvmsg 212
#define TARGET_NR_readahead 213
#define TARGET_NR_brk 214
#define TARGET_NR_munmap 215
#define TARGET_NR_mremap 216
#define TARGET_NR_add_key 217
#define TARGET_NR_request_key 218
#define TARGET_NR_keyctl 219
#define TARGET_NR_clone 220
#define TARGET_NR_execve 221
#ifdef TARGET_RISCV32
#define TARGET_NR_mmap2 222
#define TARGET_NR_fadvise64_64 223
#else
#define TARGET_NR_mmap 222
#define TARGET_NR_fadvise64 223
#endif
#define TARGET_NR_swapon 224
#define TARGET_NR_swapoff 225
#define TARGET_NR_mprotect 226
#define TARGET_NR_msync 227
#define TARGET_NR_mlock 228
#define TARGET_NR_munlock 229
#define TARGET_NR_mlockall 230
#define TARGET_NR_munlockall 231
#define TARGET_NR_mincore 232
#define TARGET_NR_madvise 233
#define TARGET_NR_remap_file_pages 234
#define TARGET_NR_mbind 235
#define TARGET_NR_get_mempolicy 236
#define TARGET_NR_set_mempolicy 237
#define TARGET_NR_migrate_pages 238
#define TARGET_NR_move_pages 239
#define TARGET_NR_rt_tgsigqueueinfo 240
#define TARGET_NR_perf_event_open 241
#define TARGET_NR_accept4 242
#define TARGET_NR_recvmmsg 243
#define TARGET_NR_arch_specific_syscall 244
#define TARGET_NR_wait4 260
#define TARGET_NR_prlimit64 261
#define TARGET_NR_fanotify_init 262
#define TARGET_NR_fanotify_mark 263
#define TARGET_NR_name_to_handle_at 264
#define TARGET_NR_open_by_handle_at 265
#define TARGET_NR_clock_adjtime 266
#define TARGET_NR_syncfs 267
#define TARGET_NR_setns 268
#define TARGET_NR_sendmmsg 269
#define TARGET_NR_process_vm_readv 270
#define TARGET_NR_process_vm_writev 271
#define TARGET_NR_kcmp 272
#define TARGET_NR_finit_module 273
#define TARGET_NR_sched_setattr 274
#define TARGET_NR_sched_getattr 275
#define TARGET_NR_renameat2 276
#define TARGET_NR_seccomp 277
#define TARGET_NR_getrandom 278
#define TARGET_NR_memfd_create 279
#define TARGET_NR_bpf 280
#define TARGET_NR_execveat 281
#define TARGET_NR_userfaultfd 282
#define TARGET_NR_membarrier 283
#define TARGET_NR_mlock2 284
#define TARGET_NR_copy_file_range 285
#define TARGET_NR_syscalls (TARGET_NR_copy_file_range + 1)

18
linux-user/riscv/target_cpu.h Normal file
View File

@ -0,0 +1,18 @@
#ifndef TARGET_CPU_H
#define TARGET_CPU_H
static inline void cpu_clone_regs(CPURISCVState *env, target_ulong newsp)
{
if (newsp) {
env->gpr[xSP] = newsp;
}
env->gpr[xA0] = 0;
}
static inline void cpu_set_tls(CPURISCVState *env, target_ulong newtls)
{
env->gpr[xTP] = newtls;
}
#endif

14
linux-user/riscv/target_elf.h Normal file
View File

@ -0,0 +1,14 @@
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation, or (at your option) any
* later version. See the COPYING file in the top-level directory.
*/
#ifndef RISCV_TARGET_ELF_H
#define RISCV_TARGET_ELF_H
static inline const char *cpu_get_model(uint32_t eflags)
{
return "any";
}
#endif

23
linux-user/riscv/target_signal.h Normal file
View File

@ -0,0 +1,23 @@
#ifndef TARGET_SIGNAL_H
#define TARGET_SIGNAL_H
#include "cpu.h"
typedef struct target_sigaltstack {
abi_ulong ss_sp;
abi_int ss_flags;
abi_ulong ss_size;
} target_stack_t;
#define TARGET_SS_ONSTACK 1
#define TARGET_SS_DISABLE 2
#define TARGET_MINSIGSTKSZ 2048
#define TARGET_SIGSTKSZ 8192
static inline abi_ulong get_sp_from_cpustate(CPURISCVState *state)
{
return state->gpr[xSP];
}
#endif /* TARGET_SIGNAL_H */

46
linux-user/riscv/target_structs.h Normal file
View File

@ -0,0 +1,46 @@
/*
* RISC-V specific structures for linux-user
*
* This is a copy of ../aarch64/target_structs.h atm.
*
*/
#ifndef TARGET_STRUCTS_H
#define TARGET_STRUCTS_H
struct target_ipc_perm {
abi_int __key; /* Key. */
abi_uint uid; /* Owner's user ID. */
abi_uint gid; /* Owner's group ID. */
abi_uint cuid; /* Creator's user ID. */
abi_uint cgid; /* Creator's group ID. */
abi_ushort mode; /* Read/write permission. */
abi_ushort __pad1;
abi_ushort __seq; /* Sequence number. */
abi_ushort __pad2;
abi_ulong __unused1;
abi_ulong __unused2;
};
struct target_shmid_ds {
struct target_ipc_perm shm_perm; /* operation permission struct */
abi_long shm_segsz; /* size of segment in bytes */
abi_ulong shm_atime; /* time of last shmat() */
#if TARGET_ABI_BITS == 32
abi_ulong __unused1;
#endif
abi_ulong shm_dtime; /* time of last shmdt() */
#if TARGET_ABI_BITS == 32
abi_ulong __unused2;
#endif
abi_ulong shm_ctime; /* time of last change by shmctl() */
#if TARGET_ABI_BITS == 32
abi_ulong __unused3;
#endif
abi_int shm_cpid; /* pid of creator */
abi_int shm_lpid; /* pid of last shmop */
abi_ulong shm_nattch; /* number of current attaches */
abi_ulong __unused4;
abi_ulong __unused5;
};
#endif

56
linux-user/riscv/target_syscall.h Normal file
View File

@ -0,0 +1,56 @@
/*
* This struct defines the way the registers are stored on the
* stack during a system call.
*
* Reference: linux/arch/riscv/include/uapi/asm/ptrace.h
*/
struct target_pt_regs {
abi_long sepc;
abi_long ra;
abi_long sp;
abi_long gp;
abi_long tp;
abi_long t0;
abi_long t1;
abi_long t2;
abi_long s0;
abi_long s1;
abi_long a0;
abi_long a1;
abi_long a2;
abi_long a3;
abi_long a4;
abi_long a5;
abi_long a6;
abi_long a7;
abi_long s2;
abi_long s3;
abi_long s4;
abi_long s5;
abi_long s6;
abi_long s7;
abi_long s8;
abi_long s9;
abi_long s10;
abi_long s11;
abi_long t3;
abi_long t4;
abi_long t5;
abi_long t6;
};
#ifdef TARGET_RISCV32
#define UNAME_MACHINE "riscv32"
#else
#define UNAME_MACHINE "riscv64"
#endif
#define UNAME_MINIMUM_RELEASE "3.8.0"
#define TARGET_MINSIGSTKSZ 2048
#define TARGET_MLOCKALL_MCL_CURRENT 1
#define TARGET_MLOCKALL_MCL_FUTURE 2
/* clone(flags, newsp, ptidptr, tls, ctidptr) for RISC-V */
/* This comes from linux/kernel/fork.c, CONFIG_CLONE_BACKWARDS */
#define TARGET_CLONE_BACKWARDS

222
linux-user/riscv/termbits.h Normal file
View File

@ -0,0 +1,222 @@
/* from asm/termbits.h */
/* NOTE: exactly the same as i386 */
#define TARGET_NCCS 19
struct target_termios {
unsigned int c_iflag; /* input mode flags */
unsigned int c_oflag; /* output mode flags */
unsigned int c_cflag; /* control mode flags */
unsigned int c_lflag; /* local mode flags */
unsigned char c_line; /* line discipline */
unsigned char c_cc[TARGET_NCCS]; /* control characters */
};
/* c_iflag bits */
#define TARGET_IGNBRK 0000001
#define TARGET_BRKINT 0000002
#define TARGET_IGNPAR 0000004
#define TARGET_PARMRK 0000010
#define TARGET_INPCK 0000020
#define TARGET_ISTRIP 0000040
#define TARGET_INLCR 0000100
#define TARGET_IGNCR 0000200
#define TARGET_ICRNL 0000400
#define TARGET_IUCLC 0001000
#define TARGET_IXON 0002000
#define TARGET_IXANY 0004000
#define TARGET_IXOFF 0010000
#define TARGET_IMAXBEL 0020000
#define TARGET_IUTF8 0040000
/* c_oflag bits */
#define TARGET_OPOST 0000001
#define TARGET_OLCUC 0000002
#define TARGET_ONLCR 0000004
#define TARGET_OCRNL 0000010
#define TARGET_ONOCR 0000020
#define TARGET_ONLRET 0000040
#define TARGET_OFILL 0000100
#define TARGET_OFDEL 0000200
#define TARGET_NLDLY 0000400
#define TARGET_NL0 0000000
#define TARGET_NL1 0000400
#define TARGET_CRDLY 0003000
#define TARGET_CR0 0000000
#define TARGET_CR1 0001000
#define TARGET_CR2 0002000
#define TARGET_CR3 0003000
#define TARGET_TABDLY 0014000
#define TARGET_TAB0 0000000
#define TARGET_TAB1 0004000
#define TARGET_TAB2 0010000
#define TARGET_TAB3 0014000
#define TARGET_XTABS 0014000
#define TARGET_BSDLY 0020000
#define TARGET_BS0 0000000
#define TARGET_BS1 0020000
#define TARGET_VTDLY 0040000
#define TARGET_VT0 0000000
#define TARGET_VT1 0040000
#define TARGET_FFDLY 0100000
#define TARGET_FF0 0000000
#define TARGET_FF1 0100000
/* c_cflag bit meaning */
#define TARGET_CBAUD 0010017
#define TARGET_B0 0000000 /* hang up */
#define TARGET_B50 0000001
#define TARGET_B75 0000002
#define TARGET_B110 0000003
#define TARGET_B134 0000004
#define TARGET_B150 0000005
#define TARGET_B200 0000006
#define TARGET_B300 0000007
#define TARGET_B600 0000010
#define TARGET_B1200 0000011
#define TARGET_B1800 0000012
#define TARGET_B2400 0000013
#define TARGET_B4800 0000014
#define TARGET_B9600 0000015
#define TARGET_B19200 0000016
#define TARGET_B38400 0000017
#define TARGET_EXTA B19200
#define TARGET_EXTB B38400
#define TARGET_CSIZE 0000060
#define TARGET_CS5 0000000
#define TARGET_CS6 0000020
#define TARGET_CS7 0000040
#define TARGET_CS8 0000060
#define TARGET_CSTOPB 0000100
#define TARGET_CREAD 0000200
#define TARGET_PARENB 0000400
#define TARGET_PARODD 0001000
#define TARGET_HUPCL 0002000
#define TARGET_CLOCAL 0004000
#define TARGET_CBAUDEX 0010000
#define TARGET_B57600 0010001
#define TARGET_B115200 0010002
#define TARGET_B230400 0010003
#define TARGET_B460800 0010004
#define TARGET_CIBAUD 002003600000 /* input baud rate (not used) */
#define TARGET_CMSPAR 010000000000 /* mark or space (stick) parity */
#define TARGET_CRTSCTS 020000000000 /* flow control */
/* c_lflag bits */
#define TARGET_ISIG 0000001
#define TARGET_ICANON 0000002
#define TARGET_XCASE 0000004
#define TARGET_ECHO 0000010
#define TARGET_ECHOE 0000020
#define TARGET_ECHOK 0000040
#define TARGET_ECHONL 0000100
#define TARGET_NOFLSH 0000200
#define TARGET_TOSTOP 0000400
#define TARGET_ECHOCTL 0001000
#define TARGET_ECHOPRT 0002000
#define TARGET_ECHOKE 0004000
#define TARGET_FLUSHO 0010000
#define TARGET_PENDIN 0040000
#define TARGET_IEXTEN 0100000
/* c_cc character offsets */
#define TARGET_VINTR 0
#define TARGET_VQUIT 1
#define TARGET_VERASE 2
#define TARGET_VKILL 3
#define TARGET_VEOF 4
#define TARGET_VTIME 5
#define TARGET_VMIN 6
#define TARGET_VSWTC 7
#define TARGET_VSTART 8
#define TARGET_VSTOP 9
#define TARGET_VSUSP 10
#define TARGET_VEOL 11
#define TARGET_VREPRINT 12
#define TARGET_VDISCARD 13
#define TARGET_VWERASE 14
#define TARGET_VLNEXT 15
#define TARGET_VEOL2 16
/* ioctls */
#define TARGET_TCGETS 0x5401
#define TARGET_TCSETS 0x5402
#define TARGET_TCSETSW 0x5403
#define TARGET_TCSETSF 0x5404
#define TARGET_TCGETA 0x5405
#define TARGET_TCSETA 0x5406
#define TARGET_TCSETAW 0x5407
#define TARGET_TCSETAF 0x5408
#define TARGET_TCSBRK 0x5409
#define TARGET_TCXONC 0x540A
#define TARGET_TCFLSH 0x540B
#define TARGET_TIOCEXCL 0x540C
#define TARGET_TIOCNXCL 0x540D
#define TARGET_TIOCSCTTY 0x540E
#define TARGET_TIOCGPGRP 0x540F
#define TARGET_TIOCSPGRP 0x5410
#define TARGET_TIOCOUTQ 0x5411
#define TARGET_TIOCSTI 0x5412
#define TARGET_TIOCGWINSZ 0x5413
#define TARGET_TIOCSWINSZ 0x5414
#define TARGET_TIOCMGET 0x5415
#define TARGET_TIOCMBIS 0x5416
#define TARGET_TIOCMBIC 0x5417
#define TARGET_TIOCMSET 0x5418
#define TARGET_TIOCGSOFTCAR 0x5419
#define TARGET_TIOCSSOFTCAR 0x541A
#define TARGET_FIONREAD 0x541B
#define TARGET_TIOCINQ TARGET_FIONREAD
#define TARGET_TIOCLINUX 0x541C
#define TARGET_TIOCCONS 0x541D
#define TARGET_TIOCGSERIAL 0x541E
#define TARGET_TIOCSSERIAL 0x541F
#define TARGET_TIOCPKT 0x5420
#define TARGET_FIONBIO 0x5421
#define TARGET_TIOCNOTTY 0x5422
#define TARGET_TIOCSETD 0x5423
#define TARGET_TIOCGETD 0x5424
#define TARGET_TCSBRKP 0x5425 /* Needed for POSIX tcsendbreak() */
#define TARGET_TIOCTTYGSTRUCT 0x5426 /* For debugging only */
#define TARGET_TIOCSBRK 0x5427 /* BSD compatibility */
#define TARGET_TIOCCBRK 0x5428 /* BSD compatibility */
#define TARGET_TIOCGSID 0x5429 /* Return the session ID of FD */
#define TARGET_TIOCGPTN TARGET_IOR('T', 0x30, unsigned int)
/* Get Pty Number (of pty-mux device) */
#define TARGET_TIOCSPTLCK TARGET_IOW('T', 0x31, int)
/* Lock/unlock Pty */
#define TARGET_TIOCGPTPEER TARGET_IO('T', 0x41)
/* Safely open the slave */
#define TARGET_FIONCLEX 0x5450 /* these numbers need to be adjusted. */
#define TARGET_FIOCLEX 0x5451
#define TARGET_FIOASYNC 0x5452
#define TARGET_TIOCSERCONFIG 0x5453
#define TARGET_TIOCSERGWILD 0x5454
#define TARGET_TIOCSERSWILD 0x5455
#define TARGET_TIOCGLCKTRMIOS 0x5456
#define TARGET_TIOCSLCKTRMIOS 0x5457
#define TARGET_TIOCSERGSTRUCT 0x5458 /* For debugging only */
#define TARGET_TIOCSERGETLSR 0x5459 /* Get line status register */
#define TARGET_TIOCSERGETMULTI 0x545A /* Get multiport config */
#define TARGET_TIOCSERSETMULTI 0x545B /* Set multiport config */
#define TARGET_TIOCMIWAIT 0x545C
/* wait for a change on serial input line(s) */
#define TARGET_TIOCGICOUNT 0x545D
/* read serial port inline interrupt counts */
#define TARGET_TIOCGHAYESESP 0x545E /* Get Hayes ESP configuration */
#define TARGET_TIOCSHAYESESP 0x545F /* Set Hayes ESP configuration */
/* Used for packet mode */
#define TARGET_TIOCPKT_DATA 0
#define TARGET_TIOCPKT_FLUSHREAD 1
#define TARGET_TIOCPKT_FLUSHWRITE 2
#define TARGET_TIOCPKT_STOP 4
#define TARGET_TIOCPKT_START 8
#define TARGET_TIOCPKT_NOSTOP 16
#define TARGET_TIOCPKT_DOSTOP 32
#define TARGET_TIOCSER_TEMT 0x01 /* Transmitter physically empty */

203
linux-user/signal.c
View File

@ -535,6 +535,7 @@ static void force_sig(int sig)
* up the signal frame. oldsig is the signal we were trying to handle
* at the point of failure.
*/
#if !defined(TARGET_RISCV)
static void force_sigsegv(int oldsig)
{
if (oldsig == SIGSEGV) {
@ -547,6 +548,8 @@ static void force_sigsegv(int oldsig)
}
#endif
#endif
/* abort execution with signal */
static void QEMU_NORETURN dump_core_and_abort(int target_sig)
{
@ -6385,6 +6388,203 @@ long do_rt_sigreturn(CPUTLGState *env)
return -TARGET_QEMU_ESIGRETURN;
}
#elif defined(TARGET_RISCV)
/* Signal handler invocation must be transparent for the code being
interrupted. Complete CPU (hart) state is saved on entry and restored
before returning from the handler. Process sigmask is also saved to block
signals while the handler is running. The handler gets its own stack,
which also doubles as storage for the CPU state and sigmask.
The code below is qemu re-implementation of arch/riscv/kernel/signal.c */
struct target_sigcontext {
abi_long pc;
abi_long gpr[31]; /* x0 is not present, so all offsets must be -1 */
uint64_t fpr[32];
uint32_t fcsr;
}; /* cf. riscv-linux:arch/riscv/include/uapi/asm/ptrace.h */
struct target_ucontext {
unsigned long uc_flags;
struct target_ucontext *uc_link;
target_stack_t uc_stack;
struct target_sigcontext uc_mcontext;
target_sigset_t uc_sigmask;
};
struct target_rt_sigframe {
uint32_t tramp[2]; /* not in kernel, which uses VDSO instead */
struct target_siginfo info;
struct target_ucontext uc;
};
static abi_ulong get_sigframe(struct target_sigaction *ka,
CPURISCVState *regs, size_t framesize)
{
abi_ulong sp = regs->gpr[xSP];
int onsigstack = on_sig_stack(sp);
/* redzone */
/* This is the X/Open sanctioned signal stack switching. */
if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
sp -= framesize;
sp &= ~3UL; /* align sp on 4-byte boundary */
/* If we are on the alternate signal stack and would overflow it, don't.
Return an always-bogus address instead so we will die with SIGSEGV. */
if (onsigstack && !likely(on_sig_stack(sp))) {
return -1L;
}
return sp;
}
static void setup_sigcontext(struct target_sigcontext *sc, CPURISCVState *env)
{
int i;
__put_user(env->pc, &sc->pc);
for (i = 1; i < 32; i++) {
__put_user(env->gpr[i], &sc->gpr[i - 1]);
}
for (i = 0; i < 32; i++) {
__put_user(env->fpr[i], &sc->fpr[i]);
}
uint32_t fcsr = csr_read_helper(env, CSR_FCSR); /*riscv_get_fcsr(env);*/
__put_user(fcsr, &sc->fcsr);
}
static void setup_ucontext(struct target_ucontext *uc,
CPURISCVState *env, target_sigset_t *set)
{
abi_ulong ss_sp = (target_ulong)target_sigaltstack_used.ss_sp;
abi_ulong ss_flags = sas_ss_flags(env->gpr[xSP]);
abi_ulong ss_size = target_sigaltstack_used.ss_size;
__put_user(0, &(uc->uc_flags));
__put_user(0, &(uc->uc_link));
__put_user(ss_sp, &(uc->uc_stack.ss_sp));
__put_user(ss_flags, &(uc->uc_stack.ss_flags));
__put_user(ss_size, &(uc->uc_stack.ss_size));
int i;
for (i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &(uc->uc_sigmask.sig[i]));
}
setup_sigcontext(&uc->uc_mcontext, env);
}
static inline void install_sigtramp(uint32_t *tramp)
{
__put_user(0x08b00893, tramp + 0); /* li a7, 139 = __NR_rt_sigreturn */
__put_user(0x00000073, tramp + 1); /* ecall */
}
static void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPURISCVState *env)
{
abi_ulong frame_addr;
struct target_rt_sigframe *frame;
frame_addr = get_sigframe(ka, env, sizeof(*frame));
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
goto badframe;
}
setup_ucontext(&frame->uc, env, set);
tswap_siginfo(&frame->info, info);
install_sigtramp(frame->tramp);
env->pc = ka->_sa_handler;
env->gpr[xSP] = frame_addr;
env->gpr[xA0] = sig;
env->gpr[xA1] = frame_addr + offsetof(struct target_rt_sigframe, info);
env->gpr[xA2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
env->gpr[xRA] = frame_addr + offsetof(struct target_rt_sigframe, tramp);
return;
badframe:
unlock_user_struct(frame, frame_addr, 1);
if (sig == TARGET_SIGSEGV) {
ka->_sa_handler = TARGET_SIG_DFL;
}
force_sig(TARGET_SIGSEGV);
}
static void restore_sigcontext(CPURISCVState *env, struct target_sigcontext *sc)
{
int i;
__get_user(env->pc, &sc->pc);
for (i = 1; i < 32; ++i) {
__get_user(env->gpr[i], &sc->gpr[i - 1]);
}
for (i = 0; i < 32; ++i) {
__get_user(env->fpr[i], &sc->fpr[i]);
}
uint32_t fcsr;
__get_user(fcsr, &sc->fcsr);
csr_write_helper(env, fcsr, CSR_FCSR);
}
static void restore_ucontext(CPURISCVState *env, struct target_ucontext *uc)
{
sigset_t blocked;
target_sigset_t target_set;
int i;
target_sigemptyset(&target_set);
for (i = 0; i < TARGET_NSIG_WORDS; i++) {
__get_user(target_set.sig[i], &(uc->uc_sigmask.sig[i]));
}
target_to_host_sigset_internal(&blocked, &target_set);
set_sigmask(&blocked);
restore_sigcontext(env, &uc->uc_mcontext);
}
long do_rt_sigreturn(CPURISCVState *env)
{
struct target_rt_sigframe *frame;
abi_ulong frame_addr;
frame_addr = env->gpr[xSP];
trace_user_do_sigreturn(env, frame_addr);
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
restore_ucontext(env, &frame->uc);
if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
uc.uc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return 0;
}
#elif defined(TARGET_HPPA)
struct target_sigcontext {
@ -6676,7 +6876,8 @@ static void handle_pending_signal(CPUArchState *cpu_env, int sig,
#if defined(TARGET_ABI_MIPSN32) || defined(TARGET_ABI_MIPSN64) \
|| defined(TARGET_OPENRISC) || defined(TARGET_TILEGX) \
|| defined(TARGET_PPC64) || defined(TARGET_HPPA) \
|| defined(TARGET_NIOS2) || defined(TARGET_X86_64)
|| defined(TARGET_NIOS2) || defined(TARGET_X86_64) \
|| defined(TARGET_RISCV)
/* These targets do not have traditional signals. */
setup_rt_frame(sig, sa, &k->info, &target_old_set, cpu_env);
#else

2
linux-user/syscall.c
View File

@ -8555,9 +8555,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
case TARGET_NR_ioctl:
ret = do_ioctl(arg1, arg2, arg3);
break;
#ifdef TARGET_NR_fcntl
case TARGET_NR_fcntl:
ret = do_fcntl(arg1, arg2, arg3);
break;
#endif
#ifdef TARGET_NR_mpx
case TARGET_NR_mpx:
goto unimplemented;

13
linux-user/syscall_defs.h
View File

@ -71,7 +71,7 @@
|| defined(TARGET_M68K) || defined(TARGET_CRIS) \
|| defined(TARGET_UNICORE32) || defined(TARGET_S390X) \
|| defined(TARGET_OPENRISC) || defined(TARGET_TILEGX) \
|| defined(TARGET_NIOS2)
|| defined(TARGET_NIOS2) || defined(TARGET_RISCV)
#define TARGET_IOC_SIZEBITS 14
#define TARGET_IOC_DIRBITS 2
@ -435,7 +435,8 @@ int do_sigaction(int sig, const struct target_sigaction *act,
|| defined(TARGET_M68K) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) \
|| defined(TARGET_MICROBLAZE) || defined(TARGET_UNICORE32) \
|| defined(TARGET_S390X) || defined(TARGET_OPENRISC) \
|| defined(TARGET_TILEGX) || defined(TARGET_HPPA) || defined(TARGET_NIOS2)
|| defined(TARGET_TILEGX) || defined(TARGET_HPPA) || defined(TARGET_NIOS2) \
|| defined(TARGET_RISCV)
#if defined(TARGET_SPARC)
#define TARGET_SA_NOCLDSTOP 8u
@ -2093,7 +2094,7 @@ struct target_stat {
unsigned int __unused[2];
};
#elif defined(TARGET_OPENRISC) || defined(TARGET_TILEGX) || \
defined(TARGET_NIOS2)
defined(TARGET_NIOS2) || defined(TARGET_RISCV)
/* These are the asm-generic versions of the stat and stat64 structures */
@ -2120,6 +2121,7 @@ struct target_stat {
unsigned int __unused5;
};
#if !defined(TARGET_RISCV64)
#define TARGET_HAS_STRUCT_STAT64
struct target_stat64 {
uint64_t st_dev;
@ -2143,6 +2145,7 @@ struct target_stat64 {
unsigned int __unused4;
unsigned int __unused5;
};
#endif
#elif defined(TARGET_HPPA)
@ -2258,8 +2261,8 @@ struct target_statfs64 {
uint32_t f_spare[6];
};
#elif (defined(TARGET_PPC64) || defined(TARGET_X86_64) || \
defined(TARGET_SPARC64) || defined(TARGET_AARCH64)) && \
!defined(TARGET_ABI32)
defined(TARGET_SPARC64) || defined(TARGET_AARCH64) || \
defined(TARGET_RISCV)) && !defined(TARGET_ABI32)
struct target_statfs {
abi_long f_type;
abi_long f_bsize;

17
qapi/misc.json
View File

@ -320,10 +320,12 @@
#
# @s390: since 2.12
#
# @riscv: since 2.12
#
# Since: 2.6
##
{ 'enum': 'CpuInfoArch',
'data': ['x86', 'sparc', 'ppc', 'mips', 'tricore', 's390', 'other' ] }
'data': ['x86', 'sparc', 'ppc', 'mips', 'tricore', 's390', 'riscv', 'other' ] }
##
# @CpuInfo:
@ -363,6 +365,7 @@
'mips': 'CpuInfoMIPS',
'tricore': 'CpuInfoTricore',
's390': 'CpuInfoS390',
'riscv': 'CpuInfoRISCV',
'other': 'CpuInfoOther' } }
##
@ -422,6 +425,17 @@
##
{ 'struct': 'CpuInfoTricore', 'data': { 'PC': 'int' } }
##
# @CpuInfoRISCV:
#
# Additional information about a virtual RISCV CPU
#
# @pc: the instruction pointer
#
# Since 2.12
##
{ 'struct': 'CpuInfoRISCV', 'data': { 'pc': 'int' } }
##
# @CpuInfoOther:
#
@ -533,6 +547,7 @@
'mips': 'CpuInfoOther',
'tricore': 'CpuInfoOther',
's390': 'CpuInfoS390',
'riscv': 'CpuInfoRISCV',
'other': 'CpuInfoOther' } }
##

13
scripts/qemu-binfmt-conf.sh
View File

@ -4,7 +4,7 @@
qemu_target_list="i386 i486 alpha arm armeb sparc32plus ppc ppc64 ppc64le m68k \
mips mipsel mipsn32 mipsn32el mips64 mips64el \
sh4 sh4eb s390x aarch64 aarch64_be hppa"
sh4 sh4eb s390x aarch64 aarch64_be hppa riscv32 riscv64"
i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
@ -100,6 +100,14 @@ hppa_magic='\x7f\x45\x4c\x46\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
hppa_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
hppa_family=hppa
riscv32_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00'
riscv32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
riscv32_family=riscv
riscv64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00'
riscv64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
riscv64_family=riscv
qemu_get_family() {
cpu=${HOST_ARCH:-$(uname -m)}
case "$cpu" in
@ -124,6 +132,9 @@ qemu_get_family() {
sparc*)
echo "sparc"
;;
riscv*)
echo "riscv"
;;
*)
echo "$cpu"
;;

1
target/riscv/Makefile.objs Normal file
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@ -0,0 +1 @@
obj-y += translate.o op_helper.o helper.o cpu.o fpu_helper.o gdbstub.o pmp.o

432
target/riscv/cpu.c Normal file
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@ -0,0 +1,432 @@
/*
* QEMU RISC-V CPU
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017-2018 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "qapi/error.h"
#include "migration/vmstate.h"
/* RISC-V CPU definitions */
static const char riscv_exts[26] = "IMAFDQECLBJTPVNSUHKORWXYZG";
const char * const riscv_int_regnames[] = {
"zero", "ra ", "sp ", "gp ", "tp ", "t0 ", "t1 ", "t2 ",
"s0 ", "s1 ", "a0 ", "a1 ", "a2 ", "a3 ", "a4 ", "a5 ",
"a6 ", "a7 ", "s2 ", "s3 ", "s4 ", "s5 ", "s6 ", "s7 ",
"s8 ", "s9 ", "s10 ", "s11 ", "t3 ", "t4 ", "t5 ", "t6 "
};
const char * const riscv_fpr_regnames[] = {
"ft0 ", "ft1 ", "ft2 ", "ft3 ", "ft4 ", "ft5 ", "ft6 ", "ft7 ",
"fs0 ", "fs1 ", "fa0 ", "fa1 ", "fa2 ", "fa3 ", "fa4 ", "fa5 ",
"fa6 ", "fa7 ", "fs2 ", "fs3 ", "fs4 ", "fs5 ", "fs6 ", "fs7 ",
"fs8 ", "fs9 ", "fs10", "fs11", "ft8 ", "ft9 ", "ft10", "ft11"
};
const char * const riscv_excp_names[] = {
"misaligned_fetch",
"fault_fetch",
"illegal_instruction",
"breakpoint",
"misaligned_load",
"fault_load",
"misaligned_store",
"fault_store",
"user_ecall",
"supervisor_ecall",
"hypervisor_ecall",
"machine_ecall",
"exec_page_fault",
"load_page_fault",
"reserved",
"store_page_fault"
};
const char * const riscv_intr_names[] = {
"u_software",
"s_software",
"h_software",
"m_software",
"u_timer",
"s_timer",
"h_timer",
"m_timer",
"u_external",
"s_external",
"h_external",
"m_external",
"coprocessor",
"host"
};
typedef struct RISCVCPUInfo {
const int bit_widths;
const char *name;
void (*initfn)(Object *obj);
} RISCVCPUInfo;
static void set_misa(CPURISCVState *env, target_ulong misa)
{
env->misa = misa;
}
static void set_versions(CPURISCVState *env, int user_ver, int priv_ver)
{
env->user_ver = user_ver;
env->priv_ver = priv_ver;
}
static void set_feature(CPURISCVState *env, int feature)
{
env->features |= (1ULL << feature);
}
static void set_resetvec(CPURISCVState *env, int resetvec)
{
#ifndef CONFIG_USER_ONLY
env->resetvec = resetvec;
#endif
}
static void riscv_any_cpu_init(Object *obj)
{
CPURISCVState *env = &RISCV_CPU(obj)->env;
set_misa(env, RVXLEN | RVI | RVM | RVA | RVF | RVD | RVC | RVU);
set_versions(env, USER_VERSION_2_02_0, PRIV_VERSION_1_10_0);
set_resetvec(env, DEFAULT_RSTVEC);
}
static void rv32gcsu_priv1_09_1_cpu_init(Object *obj)
{
CPURISCVState *env = &RISCV_CPU(obj)->env;
set_misa(env, RV32 | RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU);
set_versions(env, USER_VERSION_2_02_0, PRIV_VERSION_1_09_1);
set_resetvec(env, DEFAULT_RSTVEC);
set_feature(env, RISCV_FEATURE_MMU);
}
static void rv32gcsu_priv1_10_0_cpu_init(Object *obj)
{
CPURISCVState *env = &RISCV_CPU(obj)->env;
set_misa(env, RV32 | RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU);
set_versions(env, USER_VERSION_2_02_0, PRIV_VERSION_1_10_0);
set_resetvec(env, DEFAULT_RSTVEC);
set_feature(env, RISCV_FEATURE_MMU);
}
static void rv32imacu_nommu_cpu_init(Object *obj)
{
CPURISCVState *env = &RISCV_CPU(obj)->env;
set_misa(env, RV32 | RVI | RVM | RVA | RVC | RVU);
set_versions(env, USER_VERSION_2_02_0, PRIV_VERSION_1_10_0);
set_resetvec(env, DEFAULT_RSTVEC);
}
static void rv64gcsu_priv1_09_1_cpu_init(Object *obj)
{
CPURISCVState *env = &RISCV_CPU(obj)->env;
set_misa(env, RV64 | RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU);
set_versions(env, USER_VERSION_2_02_0, PRIV_VERSION_1_09_1);
set_resetvec(env, DEFAULT_RSTVEC);
set_feature(env, RISCV_FEATURE_MMU);
}
static void rv64gcsu_priv1_10_0_cpu_init(Object *obj)
{
CPURISCVState *env = &RISCV_CPU(obj)->env;
set_misa(env, RV64 | RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU);
set_versions(env, USER_VERSION_2_02_0, PRIV_VERSION_1_10_0);
set_resetvec(env, DEFAULT_RSTVEC);
set_feature(env, RISCV_FEATURE_MMU);
}
static void rv64imacu_nommu_cpu_init(Object *obj)
{
CPURISCVState *env = &RISCV_CPU(obj)->env;
set_misa(env, RV64 | RVI | RVM | RVA | RVC | RVU);
set_versions(env, USER_VERSION_2_02_0, PRIV_VERSION_1_10_0);
set_resetvec(env, DEFAULT_RSTVEC);
}
static const RISCVCPUInfo riscv_cpus[] = {
{ 96, TYPE_RISCV_CPU_ANY, riscv_any_cpu_init },
{ 32, TYPE_RISCV_CPU_RV32GCSU_V1_09_1, rv32gcsu_priv1_09_1_cpu_init },
{ 32, TYPE_RISCV_CPU_RV32GCSU_V1_10_0, rv32gcsu_priv1_10_0_cpu_init },
{ 32, TYPE_RISCV_CPU_RV32IMACU_NOMMU, rv32imacu_nommu_cpu_init },
{ 32, TYPE_RISCV_CPU_SIFIVE_E31, rv32imacu_nommu_cpu_init },
{ 32, TYPE_RISCV_CPU_SIFIVE_U34, rv32gcsu_priv1_10_0_cpu_init },
{ 64, TYPE_RISCV_CPU_RV64GCSU_V1_09_1, rv64gcsu_priv1_09_1_cpu_init },
{ 64, TYPE_RISCV_CPU_RV64GCSU_V1_10_0, rv64gcsu_priv1_10_0_cpu_init },
{ 64, TYPE_RISCV_CPU_RV64IMACU_NOMMU, rv64imacu_nommu_cpu_init },
{ 64, TYPE_RISCV_CPU_SIFIVE_E51, rv64imacu_nommu_cpu_init },
{ 64, TYPE_RISCV_CPU_SIFIVE_U54, rv64gcsu_priv1_10_0_cpu_init },
{ 0, NULL, NULL }
};
static ObjectClass *riscv_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *typename;
char **cpuname;
cpuname = g_strsplit(cpu_model, ",", 1);
typename = g_strdup_printf(RISCV_CPU_TYPE_NAME("%s"), cpuname[0]);
oc = object_class_by_name(typename);
g_strfreev(cpuname);
g_free(typename);
if (!oc || !object_class_dynamic_cast(oc, TYPE_RISCV_CPU) ||
object_class_is_abstract(oc)) {
return NULL;
}
return oc;
}
static void riscv_cpu_dump_state(CPUState *cs, FILE *f,
fprintf_function cpu_fprintf, int flags)
{
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
int i;
cpu_fprintf(f, " %s " TARGET_FMT_lx "\n", "pc ", env->pc);
#ifndef CONFIG_USER_ONLY
cpu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mhartid ", env->mhartid);
cpu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mstatus ", env->mstatus);
cpu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mip ",
(target_ulong)atomic_read(&env->mip));
cpu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mie ", env->mie);
cpu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mideleg ", env->mideleg);
cpu_fprintf(f, " %s " TARGET_FMT_lx "\n", "medeleg ", env->medeleg);
cpu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mtvec ", env->mtvec);
cpu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mepc ", env->mepc);
cpu_fprintf(f, " %s " TARGET_FMT_lx "\n", "mcause ", env->mcause);
#endif
for (i = 0; i < 32; i++) {
cpu_fprintf(f, " %s " TARGET_FMT_lx,
riscv_int_regnames[i], env->gpr[i]);
if ((i & 3) == 3) {
cpu_fprintf(f, "\n");
}
}
for (i = 0; i < 32; i++) {
cpu_fprintf(f, " %s %016" PRIx64,
riscv_fpr_regnames[i], env->fpr[i]);
if ((i & 3) == 3) {
cpu_fprintf(f, "\n");
}
}
}
static void riscv_cpu_set_pc(CPUState *cs, vaddr value)
{
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
env->pc = value;
}
static void riscv_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
{
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
env->pc = tb->pc;
}
static bool riscv_cpu_has_work(CPUState *cs)
{
#ifndef CONFIG_USER_ONLY
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
/*
* Definition of the WFI instruction requires it to ignore the privilege
* mode and delegation registers, but respect individual enables
*/
return (atomic_read(&env->mip) & env->mie) != 0;
#else
return true;
#endif
}
void restore_state_to_opc(CPURISCVState *env, TranslationBlock *tb,
target_ulong *data)
{
env->pc = data[0];
}
static void riscv_cpu_reset(CPUState *cs)
{
RISCVCPU *cpu = RISCV_CPU(cs);
RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(cpu);
CPURISCVState *env = &cpu->env;
mcc->parent_reset(cs);
#ifndef CONFIG_USER_ONLY
env->priv = PRV_M;
env->mstatus &= ~(MSTATUS_MIE | MSTATUS_MPRV);
env->mcause = 0;
env->pc = env->resetvec;
#endif
cs->exception_index = EXCP_NONE;
set_default_nan_mode(1, &env->fp_status);
}
static void riscv_cpu_disas_set_info(CPUState *s, disassemble_info *info)
{
#if defined(TARGET_RISCV32)
info->print_insn = print_insn_riscv32;
#elif defined(TARGET_RISCV64)
info->print_insn = print_insn_riscv64;
#endif
}
static void riscv_cpu_realize(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(dev);
Error *local_err = NULL;
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
qemu_init_vcpu(cs);
cpu_reset(cs);
mcc->parent_realize(dev, errp);
}
static void riscv_cpu_init(Object *obj)
{
CPUState *cs = CPU(obj);
RISCVCPU *cpu = RISCV_CPU(obj);
cs->env_ptr = &cpu->env;
}
static const VMStateDescription vmstate_riscv_cpu = {
.name = "cpu",
.unmigratable = 1,
};
static void riscv_cpu_class_init(ObjectClass *c, void *data)
{
RISCVCPUClass *mcc = RISCV_CPU_CLASS(c);
CPUClass *cc = CPU_CLASS(c);
DeviceClass *dc = DEVICE_CLASS(c);
mcc->parent_realize = dc->realize;
dc->realize = riscv_cpu_realize;
mcc->parent_reset = cc->reset;
cc->reset = riscv_cpu_reset;
cc->class_by_name = riscv_cpu_class_by_name;
cc->has_work = riscv_cpu_has_work;
cc->do_interrupt = riscv_cpu_do_interrupt;
cc->cpu_exec_interrupt = riscv_cpu_exec_interrupt;
cc->dump_state = riscv_cpu_dump_state;
cc->set_pc = riscv_cpu_set_pc;
cc->synchronize_from_tb = riscv_cpu_synchronize_from_tb;
cc->gdb_read_register = riscv_cpu_gdb_read_register;
cc->gdb_write_register = riscv_cpu_gdb_write_register;
cc->gdb_num_core_regs = 65;
cc->gdb_stop_before_watchpoint = true;
cc->disas_set_info = riscv_cpu_disas_set_info;
#ifdef CONFIG_USER_ONLY
cc->handle_mmu_fault = riscv_cpu_handle_mmu_fault;
#else
cc->do_unaligned_access = riscv_cpu_do_unaligned_access;
cc->get_phys_page_debug = riscv_cpu_get_phys_page_debug;
#endif
#ifdef CONFIG_TCG
cc->tcg_initialize = riscv_translate_init;
#endif
/* For now, mark unmigratable: */
cc->vmsd = &vmstate_riscv_cpu;
}
static void cpu_register(const RISCVCPUInfo *info)
{
TypeInfo type_info = {
.name = info->name,
.parent = TYPE_RISCV_CPU,
.instance_size = sizeof(RISCVCPU),
.instance_init = info->initfn,
};
type_register(&type_info);
}
static const TypeInfo riscv_cpu_type_info = {
.name = TYPE_RISCV_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(RISCVCPU),
.instance_init = riscv_cpu_init,
.abstract = false,
.class_size = sizeof(RISCVCPUClass),
.class_init = riscv_cpu_class_init,
};
char *riscv_isa_string(RISCVCPU *cpu)
{
int i;
size_t maxlen = 5 + ctz32(cpu->env.misa);
char *isa_string = g_new0(char, maxlen);
snprintf(isa_string, maxlen, "rv%d", TARGET_LONG_BITS);
for (i = 0; i < sizeof(riscv_exts); i++) {
if (cpu->env.misa & RV(riscv_exts[i])) {
isa_string[strlen(isa_string)] = riscv_exts[i] - 'A' + 'a';
}
}
return isa_string;
}
void riscv_cpu_list(FILE *f, fprintf_function cpu_fprintf)
{
const RISCVCPUInfo *info = riscv_cpus;
while (info->name) {
if (info->bit_widths & TARGET_LONG_BITS) {
(*cpu_fprintf)(f, "%s\n", info->name);
}
info++;
}
}
static void riscv_cpu_register_types(void)
{
const RISCVCPUInfo *info = riscv_cpus;
type_register_static(&riscv_cpu_type_info);
while (info->name) {
if (info->bit_widths & TARGET_LONG_BITS) {
cpu_register(info);
}
info++;
}
}
type_init(riscv_cpu_register_types)

296
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@ -0,0 +1,296 @@
/*
* QEMU RISC-V CPU
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017-2018 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef RISCV_CPU_H
#define RISCV_CPU_H
/* QEMU addressing/paging config */
#define TARGET_PAGE_BITS 12 /* 4 KiB Pages */
#if defined(TARGET_RISCV64)
#define TARGET_LONG_BITS 64
#define TARGET_PHYS_ADDR_SPACE_BITS 50
#define TARGET_VIRT_ADDR_SPACE_BITS 39
#elif defined(TARGET_RISCV32)
#define TARGET_LONG_BITS 32
#define TARGET_PHYS_ADDR_SPACE_BITS 34
#define TARGET_VIRT_ADDR_SPACE_BITS 32
#endif
#define TCG_GUEST_DEFAULT_MO 0
#define ELF_MACHINE EM_RISCV
#define CPUArchState struct CPURISCVState
#include "qemu-common.h"
#include "qom/cpu.h"
#include "exec/cpu-defs.h"
#include "fpu/softfloat.h"
#define TYPE_RISCV_CPU "riscv-cpu"
#define RISCV_CPU_TYPE_SUFFIX "-" TYPE_RISCV_CPU
#define RISCV_CPU_TYPE_NAME(name) (name RISCV_CPU_TYPE_SUFFIX)
#define TYPE_RISCV_CPU_ANY RISCV_CPU_TYPE_NAME("any")
#define TYPE_RISCV_CPU_RV32GCSU_V1_09_1 RISCV_CPU_TYPE_NAME("rv32gcsu-v1.9.1")
#define TYPE_RISCV_CPU_RV32GCSU_V1_10_0 RISCV_CPU_TYPE_NAME("rv32gcsu-v1.10.0")
#define TYPE_RISCV_CPU_RV32IMACU_NOMMU RISCV_CPU_TYPE_NAME("rv32imacu-nommu")
#define TYPE_RISCV_CPU_RV64GCSU_V1_09_1 RISCV_CPU_TYPE_NAME("rv64gcsu-v1.9.1")
#define TYPE_RISCV_CPU_RV64GCSU_V1_10_0 RISCV_CPU_TYPE_NAME("rv64gcsu-v1.10.0")
#define TYPE_RISCV_CPU_RV64IMACU_NOMMU RISCV_CPU_TYPE_NAME("rv64imacu-nommu")
#define TYPE_RISCV_CPU_SIFIVE_E31 RISCV_CPU_TYPE_NAME("sifive-e31")
#define TYPE_RISCV_CPU_SIFIVE_E51 RISCV_CPU_TYPE_NAME("sifive-e51")
#define TYPE_RISCV_CPU_SIFIVE_U34 RISCV_CPU_TYPE_NAME("sifive-u34")
#define TYPE_RISCV_CPU_SIFIVE_U54 RISCV_CPU_TYPE_NAME("sifive-u54")
#define RV32 ((target_ulong)1 << (TARGET_LONG_BITS - 2))
#define RV64 ((target_ulong)2 << (TARGET_LONG_BITS - 2))
#if defined(TARGET_RISCV32)
#define RVXLEN RV32
#elif defined(TARGET_RISCV64)
#define RVXLEN RV64
#endif
#define RV(x) ((target_ulong)1 << (x - 'A'))
#define RVI RV('I')
#define RVM RV('M')
#define RVA RV('A')
#define RVF RV('F')
#define RVD RV('D')
#define RVC RV('C')
#define RVS RV('S')
#define RVU RV('U')
/* S extension denotes that Supervisor mode exists, however it is possible
to have a core that support S mode but does not have an MMU and there
is currently no bit in misa to indicate whether an MMU exists or not
so a cpu features bitfield is required */
enum {
RISCV_FEATURE_MMU
};
#define USER_VERSION_2_02_0 0x00020200
#define PRIV_VERSION_1_09_1 0x00010901
#define PRIV_VERSION_1_10_0 0x00011000
#define TRANSLATE_FAIL 1
#define TRANSLATE_SUCCESS 0
#define NB_MMU_MODES 4
#define MMU_USER_IDX 3
#define MAX_RISCV_PMPS (16)
typedef struct CPURISCVState CPURISCVState;
#include "pmp.h"
struct CPURISCVState {
target_ulong gpr[32];
uint64_t fpr[32]; /* assume both F and D extensions */
target_ulong pc;
target_ulong load_res;
target_ulong load_val;
target_ulong frm;
target_ulong badaddr;
target_ulong user_ver;
target_ulong priv_ver;
target_ulong misa;
uint32_t features;
#ifndef CONFIG_USER_ONLY
target_ulong priv;
target_ulong resetvec;
target_ulong mhartid;
target_ulong mstatus;
/*
* CAUTION! Unlike the rest of this struct, mip is accessed asynchonously
* by I/O threads and other vCPUs, so hold the iothread mutex before
* operating on it. CPU_INTERRUPT_HARD should be in effect iff this is
* non-zero. Use riscv_cpu_set_local_interrupt.
*/
uint32_t mip; /* allow atomic_read for >= 32-bit hosts */
target_ulong mie;
target_ulong mideleg;
target_ulong sptbr; /* until: priv-1.9.1 */
target_ulong satp; /* since: priv-1.10.0 */
target_ulong sbadaddr;
target_ulong mbadaddr;
target_ulong medeleg;
target_ulong stvec;
target_ulong sepc;
target_ulong scause;
target_ulong mtvec;
target_ulong mepc;
target_ulong mcause;
target_ulong mtval; /* since: priv-1.10.0 */
uint32_t mucounteren;
uint32_t mscounteren;
target_ulong scounteren; /* since: priv-1.10.0 */
target_ulong mcounteren; /* since: priv-1.10.0 */
target_ulong sscratch;
target_ulong mscratch;
/* temporary htif regs */
uint64_t mfromhost;
uint64_t mtohost;
uint64_t timecmp;
/* physical memory protection */
pmp_table_t pmp_state;
#endif
float_status fp_status;
/* QEMU */
CPU_COMMON
/* Fields from here on are preserved across CPU reset. */
QEMUTimer *timer; /* Internal timer */
};
#define RISCV_CPU_CLASS(klass) \
OBJECT_CLASS_CHECK(RISCVCPUClass, (klass), TYPE_RISCV_CPU)
#define RISCV_CPU(obj) \
OBJECT_CHECK(RISCVCPU, (obj), TYPE_RISCV_CPU)
#define RISCV_CPU_GET_CLASS(obj) \
OBJECT_GET_CLASS(RISCVCPUClass, (obj), TYPE_RISCV_CPU)
/**
* RISCVCPUClass:
* @parent_realize: The parent class' realize handler.
* @parent_reset: The parent class' reset handler.
*
* A RISCV CPU model.
*/
typedef struct RISCVCPUClass {
/*< private >*/
CPUClass parent_class;
/*< public >*/
DeviceRealize parent_realize;
void (*parent_reset)(CPUState *cpu);
} RISCVCPUClass;
/**
* RISCVCPU:
* @env: #CPURISCVState
*
* A RISCV CPU.
*/
typedef struct RISCVCPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
CPURISCVState env;
} RISCVCPU;
static inline RISCVCPU *riscv_env_get_cpu(CPURISCVState *env)
{
return container_of(env, RISCVCPU, env);
}
static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext)
{
return (env->misa & ext) != 0;
}
static inline bool riscv_feature(CPURISCVState *env, int feature)
{
return env->features & (1ULL << feature);
}
#include "cpu_user.h"
#include "cpu_bits.h"
extern const char * const riscv_int_regnames[];
extern const char * const riscv_fpr_regnames[];
extern const char * const riscv_excp_names[];
extern const char * const riscv_intr_names[];
#define ENV_GET_CPU(e) CPU(riscv_env_get_cpu(e))
#define ENV_OFFSET offsetof(RISCVCPU, env)
void riscv_cpu_do_interrupt(CPUState *cpu);
int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request);
int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch);
hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
MMUAccessType access_type, int mmu_idx,
uintptr_t retaddr);
int riscv_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int size,
int rw, int mmu_idx);
char *riscv_isa_string(RISCVCPU *cpu);
void riscv_cpu_list(FILE *f, fprintf_function cpu_fprintf);
#define cpu_init(cpu_model) cpu_generic_init(TYPE_RISCV_CPU, cpu_model)
#define cpu_signal_handler cpu_riscv_signal_handler
#define cpu_list riscv_cpu_list
#define cpu_mmu_index riscv_cpu_mmu_index
void riscv_set_mode(CPURISCVState *env, target_ulong newpriv);
void riscv_translate_init(void);
RISCVCPU *cpu_riscv_init(const char *cpu_model);
int cpu_riscv_signal_handler(int host_signum, void *pinfo, void *puc);
void QEMU_NORETURN do_raise_exception_err(CPURISCVState *env,
uint32_t exception, uintptr_t pc);
target_ulong cpu_riscv_get_fflags(CPURISCVState *env);
void cpu_riscv_set_fflags(CPURISCVState *env, target_ulong);
#define TB_FLAGS_MMU_MASK 3
#define TB_FLAGS_FP_ENABLE MSTATUS_FS
static inline void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->pc;
*cs_base = 0;
#ifdef CONFIG_USER_ONLY
*flags = TB_FLAGS_FP_ENABLE;
#else
*flags = cpu_mmu_index(env, 0) | (env->mstatus & MSTATUS_FS);
#endif
}
void csr_write_helper(CPURISCVState *env, target_ulong val_to_write,
target_ulong csrno);
target_ulong csr_read_helper(CPURISCVState *env, target_ulong csrno);
#ifndef CONFIG_USER_ONLY
void riscv_set_local_interrupt(RISCVCPU *cpu, target_ulong mask, int value);
#endif
#include "exec/cpu-all.h"
#endif /* RISCV_CPU_H */

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/* RISC-V ISA constants */
#define get_field(reg, mask) (((reg) & \
(target_ulong)(mask)) / ((mask) & ~((mask) << 1)))
#define set_field(reg, mask, val) (((reg) & ~(target_ulong)(mask)) | \
(((target_ulong)(val) * ((mask) & ~((mask) << 1))) & \
(target_ulong)(mask)))
#define PGSHIFT 12
#define FSR_RD_SHIFT 5
#define FSR_RD (0x7 << FSR_RD_SHIFT)
#define FPEXC_NX 0x01
#define FPEXC_UF 0x02
#define FPEXC_OF 0x04
#define FPEXC_DZ 0x08
#define FPEXC_NV 0x10
#define FSR_AEXC_SHIFT 0
#define FSR_NVA (FPEXC_NV << FSR_AEXC_SHIFT)
#define FSR_OFA (FPEXC_OF << FSR_AEXC_SHIFT)
#define FSR_UFA (FPEXC_UF << FSR_AEXC_SHIFT)
#define FSR_DZA (FPEXC_DZ << FSR_AEXC_SHIFT)
#define FSR_NXA (FPEXC_NX << FSR_AEXC_SHIFT)
#define FSR_AEXC (FSR_NVA | FSR_OFA | FSR_UFA | FSR_DZA | FSR_NXA)
/* CSR numbers */
#define CSR_FFLAGS 0x1
#define CSR_FRM 0x2
#define CSR_FCSR 0x3
#define CSR_CYCLE 0xc00
#define CSR_TIME 0xc01
#define CSR_INSTRET 0xc02
#define CSR_HPMCOUNTER3 0xc03
#define CSR_HPMCOUNTER4 0xc04
#define CSR_HPMCOUNTER5 0xc05
#define CSR_HPMCOUNTER6 0xc06
#define CSR_HPMCOUNTER7 0xc07
#define CSR_HPMCOUNTER8 0xc08
#define CSR_HPMCOUNTER9 0xc09
#define CSR_HPMCOUNTER10 0xc0a
#define CSR_HPMCOUNTER11 0xc0b
#define CSR_HPMCOUNTER12 0xc0c
#define CSR_HPMCOUNTER13 0xc0d
#define CSR_HPMCOUNTER14 0xc0e
#define CSR_HPMCOUNTER15 0xc0f
#define CSR_HPMCOUNTER16 0xc10
#define CSR_HPMCOUNTER17 0xc11
#define CSR_HPMCOUNTER18 0xc12
#define CSR_HPMCOUNTER19 0xc13
#define CSR_HPMCOUNTER20 0xc14
#define CSR_HPMCOUNTER21 0xc15
#define CSR_HPMCOUNTER22 0xc16
#define CSR_HPMCOUNTER23 0xc17
#define CSR_HPMCOUNTER24 0xc18
#define CSR_HPMCOUNTER25 0xc19
#define CSR_HPMCOUNTER26 0xc1a
#define CSR_HPMCOUNTER27 0xc1b
#define CSR_HPMCOUNTER28 0xc1c
#define CSR_HPMCOUNTER29 0xc1d
#define CSR_HPMCOUNTER30 0xc1e
#define CSR_HPMCOUNTER31 0xc1f
#define CSR_SSTATUS 0x100
#define CSR_SIE 0x104
#define CSR_STVEC 0x105
#define CSR_SCOUNTEREN 0x106
#define CSR_SSCRATCH 0x140
#define CSR_SEPC 0x141
#define CSR_SCAUSE 0x142
#define CSR_SBADADDR 0x143
#define CSR_SIP 0x144
#define CSR_SPTBR 0x180
#define CSR_SATP 0x180
#define CSR_MSTATUS 0x300
#define CSR_MISA 0x301
#define CSR_MEDELEG 0x302
#define CSR_MIDELEG 0x303
#define CSR_MIE 0x304
#define CSR_MTVEC 0x305
#define CSR_MCOUNTEREN 0x306
#define CSR_MSCRATCH 0x340
#define CSR_MEPC 0x341
#define CSR_MCAUSE 0x342
#define CSR_MBADADDR 0x343
#define CSR_MIP 0x344
#define CSR_PMPCFG0 0x3a0
#define CSR_PMPCFG1 0x3a1
#define CSR_PMPCFG2 0x3a2
#define CSR_PMPCFG3 0x3a3
#define CSR_PMPADDR0 0x3b0
#define CSR_PMPADDR1 0x3b1
#define CSR_PMPADDR2 0x3b2
#define CSR_PMPADDR3 0x3b3
#define CSR_PMPADDR4 0x3b4
#define CSR_PMPADDR5 0x3b5
#define CSR_PMPADDR6 0x3b6
#define CSR_PMPADDR7 0x3b7
#define CSR_PMPADDR8 0x3b8
#define CSR_PMPADDR9 0x3b9
#define CSR_PMPADDR10 0x3ba
#define CSR_PMPADDR11 0x3bb
#define CSR_PMPADDR12 0x3bc
#define CSR_PMPADDR13 0x3bd
#define CSR_PMPADDR14 0x3be
#define CSR_PMPADDR15 0x3bf
#define CSR_TSELECT 0x7a0
#define CSR_TDATA1 0x7a1
#define CSR_TDATA2 0x7a2
#define CSR_TDATA3 0x7a3
#define CSR_DCSR 0x7b0
#define CSR_DPC 0x7b1
#define CSR_DSCRATCH 0x7b2
#define CSR_MCYCLE 0xb00
#define CSR_MINSTRET 0xb02
#define CSR_MHPMCOUNTER3 0xb03
#define CSR_MHPMCOUNTER4 0xb04
#define CSR_MHPMCOUNTER5 0xb05
#define CSR_MHPMCOUNTER6 0xb06
#define CSR_MHPMCOUNTER7 0xb07
#define CSR_MHPMCOUNTER8 0xb08
#define CSR_MHPMCOUNTER9 0xb09
#define CSR_MHPMCOUNTER10 0xb0a
#define CSR_MHPMCOUNTER11 0xb0b
#define CSR_MHPMCOUNTER12 0xb0c
#define CSR_MHPMCOUNTER13 0xb0d
#define CSR_MHPMCOUNTER14 0xb0e
#define CSR_MHPMCOUNTER15 0xb0f
#define CSR_MHPMCOUNTER16 0xb10
#define CSR_MHPMCOUNTER17 0xb11
#define CSR_MHPMCOUNTER18 0xb12
#define CSR_MHPMCOUNTER19 0xb13
#define CSR_MHPMCOUNTER20 0xb14
#define CSR_MHPMCOUNTER21 0xb15
#define CSR_MHPMCOUNTER22 0xb16
#define CSR_MHPMCOUNTER23 0xb17
#define CSR_MHPMCOUNTER24 0xb18
#define CSR_MHPMCOUNTER25 0xb19
#define CSR_MHPMCOUNTER26 0xb1a
#define CSR_MHPMCOUNTER27 0xb1b
#define CSR_MHPMCOUNTER28 0xb1c
#define CSR_MHPMCOUNTER29 0xb1d
#define CSR_MHPMCOUNTER30 0xb1e
#define CSR_MHPMCOUNTER31 0xb1f
#define CSR_MUCOUNTEREN 0x320
#define CSR_MSCOUNTEREN 0x321
#define CSR_MHPMEVENT3 0x323
#define CSR_MHPMEVENT4 0x324
#define CSR_MHPMEVENT5 0x325
#define CSR_MHPMEVENT6 0x326
#define CSR_MHPMEVENT7 0x327
#define CSR_MHPMEVENT8 0x328
#define CSR_MHPMEVENT9 0x329
#define CSR_MHPMEVENT10 0x32a
#define CSR_MHPMEVENT11 0x32b
#define CSR_MHPMEVENT12 0x32c
#define CSR_MHPMEVENT13 0x32d
#define CSR_MHPMEVENT14 0x32e
#define CSR_MHPMEVENT15 0x32f
#define CSR_MHPMEVENT16 0x330
#define CSR_MHPMEVENT17 0x331
#define CSR_MHPMEVENT18 0x332
#define CSR_MHPMEVENT19 0x333
#define CSR_MHPMEVENT20 0x334
#define CSR_MHPMEVENT21 0x335
#define CSR_MHPMEVENT22 0x336
#define CSR_MHPMEVENT23 0x337
#define CSR_MHPMEVENT24 0x338
#define CSR_MHPMEVENT25 0x339
#define CSR_MHPMEVENT26 0x33a
#define CSR_MHPMEVENT27 0x33b
#define CSR_MHPMEVENT28 0x33c
#define CSR_MHPMEVENT29 0x33d
#define CSR_MHPMEVENT30 0x33e
#define CSR_MHPMEVENT31 0x33f
#define CSR_MVENDORID 0xf11
#define CSR_MARCHID 0xf12
#define CSR_MIMPID 0xf13
#define CSR_MHARTID 0xf14
#define CSR_CYCLEH 0xc80
#define CSR_TIMEH 0xc81
#define CSR_INSTRETH 0xc82
#define CSR_HPMCOUNTER3H 0xc83
#define CSR_HPMCOUNTER4H 0xc84
#define CSR_HPMCOUNTER5H 0xc85
#define CSR_HPMCOUNTER6H 0xc86
#define CSR_HPMCOUNTER7H 0xc87
#define CSR_HPMCOUNTER8H 0xc88
#define CSR_HPMCOUNTER9H 0xc89
#define CSR_HPMCOUNTER10H 0xc8a
#define CSR_HPMCOUNTER11H 0xc8b
#define CSR_HPMCOUNTER12H 0xc8c
#define CSR_HPMCOUNTER13H 0xc8d
#define CSR_HPMCOUNTER14H 0xc8e
#define CSR_HPMCOUNTER15H 0xc8f
#define CSR_HPMCOUNTER16H 0xc90
#define CSR_HPMCOUNTER17H 0xc91
#define CSR_HPMCOUNTER18H 0xc92
#define CSR_HPMCOUNTER19H 0xc93
#define CSR_HPMCOUNTER20H 0xc94
#define CSR_HPMCOUNTER21H 0xc95
#define CSR_HPMCOUNTER22H 0xc96
#define CSR_HPMCOUNTER23H 0xc97
#define CSR_HPMCOUNTER24H 0xc98
#define CSR_HPMCOUNTER25H 0xc99
#define CSR_HPMCOUNTER26H 0xc9a
#define CSR_HPMCOUNTER27H 0xc9b
#define CSR_HPMCOUNTER28H 0xc9c
#define CSR_HPMCOUNTER29H 0xc9d
#define CSR_HPMCOUNTER30H 0xc9e
#define CSR_HPMCOUNTER31H 0xc9f
#define CSR_MCYCLEH 0xb80
#define CSR_MINSTRETH 0xb82
#define CSR_MHPMCOUNTER3H 0xb83
#define CSR_MHPMCOUNTER4H 0xb84
#define CSR_MHPMCOUNTER5H 0xb85
#define CSR_MHPMCOUNTER6H 0xb86
#define CSR_MHPMCOUNTER7H 0xb87
#define CSR_MHPMCOUNTER8H 0xb88
#define CSR_MHPMCOUNTER9H 0xb89
#define CSR_MHPMCOUNTER10H 0xb8a
#define CSR_MHPMCOUNTER11H 0xb8b
#define CSR_MHPMCOUNTER12H 0xb8c
#define CSR_MHPMCOUNTER13H 0xb8d
#define CSR_MHPMCOUNTER14H 0xb8e
#define CSR_MHPMCOUNTER15H 0xb8f
#define CSR_MHPMCOUNTER16H 0xb90
#define CSR_MHPMCOUNTER17H 0xb91
#define CSR_MHPMCOUNTER18H 0xb92
#define CSR_MHPMCOUNTER19H 0xb93
#define CSR_MHPMCOUNTER20H 0xb94
#define CSR_MHPMCOUNTER21H 0xb95
#define CSR_MHPMCOUNTER22H 0xb96
#define CSR_MHPMCOUNTER23H 0xb97
#define CSR_MHPMCOUNTER24H 0xb98
#define CSR_MHPMCOUNTER25H 0xb99
#define CSR_MHPMCOUNTER26H 0xb9a
#define CSR_MHPMCOUNTER27H 0xb9b
#define CSR_MHPMCOUNTER28H 0xb9c
#define CSR_MHPMCOUNTER29H 0xb9d
#define CSR_MHPMCOUNTER30H 0xb9e
#define CSR_MHPMCOUNTER31H 0xb9f
/* mstatus bits */
#define MSTATUS_UIE 0x00000001
#define MSTATUS_SIE 0x00000002
#define MSTATUS_HIE 0x00000004
#define MSTATUS_MIE 0x00000008
#define MSTATUS_UPIE 0x00000010
#define MSTATUS_SPIE 0x00000020
#define MSTATUS_HPIE 0x00000040
#define MSTATUS_MPIE 0x00000080
#define MSTATUS_SPP 0x00000100
#define MSTATUS_HPP 0x00000600
#define MSTATUS_MPP 0x00001800
#define MSTATUS_FS 0x00006000
#define MSTATUS_XS 0x00018000
#define MSTATUS_MPRV 0x00020000
#define MSTATUS_PUM 0x00040000 /* until: priv-1.9.1 */
#define MSTATUS_SUM 0x00040000 /* since: priv-1.10 */
#define MSTATUS_MXR 0x00080000
#define MSTATUS_VM 0x1F000000 /* until: priv-1.9.1 */
#define MSTATUS_TVM 0x00100000 /* since: priv-1.10 */
#define MSTATUS_TW 0x20000000 /* since: priv-1.10 */
#define MSTATUS_TSR 0x40000000 /* since: priv-1.10 */
#define MSTATUS64_UXL 0x0000000300000000ULL
#define MSTATUS64_SXL 0x0000000C00000000ULL
#define MSTATUS32_SD 0x80000000
#define MSTATUS64_SD 0x8000000000000000ULL
#if defined(TARGET_RISCV32)
#define MSTATUS_SD MSTATUS32_SD
#elif defined(TARGET_RISCV64)
#define MSTATUS_SD MSTATUS64_SD
#endif
/* sstatus bits */
#define SSTATUS_UIE 0x00000001
#define SSTATUS_SIE 0x00000002
#define SSTATUS_UPIE 0x00000010
#define SSTATUS_SPIE 0x00000020
#define SSTATUS_SPP 0x00000100
#define SSTATUS_FS 0x00006000
#define SSTATUS_XS 0x00018000
#define SSTATUS_PUM 0x00040000 /* until: priv-1.9.1 */
#define SSTATUS_SUM 0x00040000 /* since: priv-1.10 */
#define SSTATUS_MXR 0x00080000
#define SSTATUS32_SD 0x80000000
#define SSTATUS64_SD 0x8000000000000000ULL
#if defined(TARGET_RISCV32)
#define SSTATUS_SD SSTATUS32_SD
#elif defined(TARGET_RISCV64)
#define SSTATUS_SD SSTATUS64_SD
#endif
/* irqs */
#define MIP_SSIP (1 << IRQ_S_SOFT)
#define MIP_HSIP (1 << IRQ_H_SOFT)
#define MIP_MSIP (1 << IRQ_M_SOFT)
#define MIP_STIP (1 << IRQ_S_TIMER)
#define MIP_HTIP (1 << IRQ_H_TIMER)
#define MIP_MTIP (1 << IRQ_M_TIMER)
#define MIP_SEIP (1 << IRQ_S_EXT)
#define MIP_HEIP (1 << IRQ_H_EXT)
#define MIP_MEIP (1 << IRQ_M_EXT)
#define SIP_SSIP MIP_SSIP
#define SIP_STIP MIP_STIP
#define SIP_SEIP MIP_SEIP
#define PRV_U 0
#define PRV_S 1
#define PRV_H 2
#define PRV_M 3
/* privileged ISA 1.9.1 VM modes (mstatus.vm) */
#define VM_1_09_MBARE 0
#define VM_1_09_MBB 1
#define VM_1_09_MBBID 2
#define VM_1_09_SV32 8
#define VM_1_09_SV39 9
#define VM_1_09_SV48 10
/* privileged ISA 1.10.0 VM modes (satp.mode) */
#define VM_1_10_MBARE 0
#define VM_1_10_SV32 1
#define VM_1_10_SV39 8
#define VM_1_10_SV48 9
#define VM_1_10_SV57 10
#define VM_1_10_SV64 11
/* privileged ISA interrupt causes */
#define IRQ_U_SOFT 0 /* since: priv-1.10 */
#define IRQ_S_SOFT 1
#define IRQ_H_SOFT 2 /* until: priv-1.9.1 */
#define IRQ_M_SOFT 3 /* until: priv-1.9.1 */
#define IRQ_U_TIMER 4 /* since: priv-1.10 */
#define IRQ_S_TIMER 5
#define IRQ_H_TIMER 6 /* until: priv-1.9.1 */
#define IRQ_M_TIMER 7 /* until: priv-1.9.1 */
#define IRQ_U_EXT 8 /* since: priv-1.10 */
#define IRQ_S_EXT 9
#define IRQ_H_EXT 10 /* until: priv-1.9.1 */
#define IRQ_M_EXT 11 /* until: priv-1.9.1 */
#define IRQ_X_COP 12 /* non-standard */
/* Default addresses */
#define DEFAULT_RSTVEC 0x00001000
/* RV32 satp field masks */
#define SATP32_MODE 0x80000000
#define SATP32_ASID 0x7fc00000
#define SATP32_PPN 0x003fffff
/* RV64 satp field masks */
#define SATP64_MODE 0xF000000000000000ULL
#define SATP64_ASID 0x0FFFF00000000000ULL
#define SATP64_PPN 0x00000FFFFFFFFFFFULL
#if defined(TARGET_RISCV32)
#define SATP_MODE SATP32_MODE
#define SATP_ASID SATP32_ASID
#define SATP_PPN SATP32_PPN
#endif
#if defined(TARGET_RISCV64)
#define SATP_MODE SATP64_MODE
#define SATP_ASID SATP64_ASID
#define SATP_PPN SATP64_PPN
#endif
/* RISCV Exception Codes */
#define EXCP_NONE -1 /* not a real RISCV exception code */
#define RISCV_EXCP_INST_ADDR_MIS 0x0
#define RISCV_EXCP_INST_ACCESS_FAULT 0x1
#define RISCV_EXCP_ILLEGAL_INST 0x2
#define RISCV_EXCP_BREAKPOINT 0x3
#define RISCV_EXCP_LOAD_ADDR_MIS 0x4
#define RISCV_EXCP_LOAD_ACCESS_FAULT 0x5
#define RISCV_EXCP_STORE_AMO_ADDR_MIS 0x6
#define RISCV_EXCP_STORE_AMO_ACCESS_FAULT 0x7
#define RISCV_EXCP_U_ECALL 0x8 /* for convenience, report all
ECALLs as this, handler
fixes */
#define RISCV_EXCP_S_ECALL 0x9
#define RISCV_EXCP_H_ECALL 0xa
#define RISCV_EXCP_M_ECALL 0xb
#define RISCV_EXCP_INST_PAGE_FAULT 0xc /* since: priv-1.10.0 */
#define RISCV_EXCP_LOAD_PAGE_FAULT 0xd /* since: priv-1.10.0 */
#define RISCV_EXCP_STORE_PAGE_FAULT 0xf /* since: priv-1.10.0 */
#define RISCV_EXCP_INT_FLAG 0x80000000
#define RISCV_EXCP_INT_MASK 0x7fffffff
/* page table entry (PTE) fields */
#define PTE_V 0x001 /* Valid */
#define PTE_R 0x002 /* Read */
#define PTE_W 0x004 /* Write */
#define PTE_X 0x008 /* Execute */
#define PTE_U 0x010 /* User */
#define PTE_G 0x020 /* Global */
#define PTE_A 0x040 /* Accessed */
#define PTE_D 0x080 /* Dirty */
#define PTE_SOFT 0x300 /* Reserved for Software */
#define PTE_PPN_SHIFT 10
#define PTE_TABLE(PTE) (((PTE) & (PTE_V | PTE_R | PTE_W | PTE_X)) == PTE_V)

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#define xRA 1 /* return address (aka link register) */
#define xSP 2 /* stack pointer */
#define xGP 3 /* global pointer */
#define xTP 4 /* thread pointer */
#define xA0 10 /* gpr[10-17] are syscall arguments */
#define xA1 11
#define xA2 12
#define xA3 13
#define xA4 14
#define xA5 15
#define xA6 16
#define xA7 17 /* syscall number goes here */

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/*
* RISC-V FPU Emulation Helpers for QEMU.
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include <stdlib.h>
#include "cpu.h"
#include "qemu/host-utils.h"
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
target_ulong cpu_riscv_get_fflags(CPURISCVState *env)
{
int soft = get_float_exception_flags(&env->fp_status);
target_ulong hard = 0;
hard |= (soft & float_flag_inexact) ? FPEXC_NX : 0;
hard |= (soft & float_flag_underflow) ? FPEXC_UF : 0;
hard |= (soft & float_flag_overflow) ? FPEXC_OF : 0;
hard |= (soft & float_flag_divbyzero) ? FPEXC_DZ : 0;
hard |= (soft & float_flag_invalid) ? FPEXC_NV : 0;
return hard;
}
void cpu_riscv_set_fflags(CPURISCVState *env, target_ulong hard)
{
int soft = 0;
soft |= (hard & FPEXC_NX) ? float_flag_inexact : 0;
soft |= (hard & FPEXC_UF) ? float_flag_underflow : 0;
soft |= (hard & FPEXC_OF) ? float_flag_overflow : 0;
soft |= (hard & FPEXC_DZ) ? float_flag_divbyzero : 0;
soft |= (hard & FPEXC_NV) ? float_flag_invalid : 0;
set_float_exception_flags(soft, &env->fp_status);
}
void helper_set_rounding_mode(CPURISCVState *env, uint32_t rm)
{
int softrm;
if (rm == 7) {
rm = env->frm;
}
switch (rm) {
case 0:
softrm = float_round_nearest_even;
break;
case 1:
softrm = float_round_to_zero;
break;
case 2:
softrm = float_round_down;
break;
case 3:
softrm = float_round_up;
break;
case 4:
softrm = float_round_ties_away;
break;
default:
do_raise_exception_err(env, RISCV_EXCP_ILLEGAL_INST, GETPC());
}
set_float_rounding_mode(softrm, &env->fp_status);
}
uint64_t helper_fmadd_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2,
uint64_t frs3)
{
return float32_muladd(frs1, frs2, frs3, 0, &env->fp_status);
}
uint64_t helper_fmadd_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2,
uint64_t frs3)
{
return float64_muladd(frs1, frs2, frs3, 0, &env->fp_status);
}
uint64_t helper_fmsub_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2,
uint64_t frs3)
{
return float32_muladd(frs1, frs2, frs3, float_muladd_negate_c,
&env->fp_status);
}
uint64_t helper_fmsub_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2,
uint64_t frs3)
{
return float64_muladd(frs1, frs2, frs3, float_muladd_negate_c,
&env->fp_status);
}
uint64_t helper_fnmsub_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2,
uint64_t frs3)
{
return float32_muladd(frs1, frs2, frs3, float_muladd_negate_product,
&env->fp_status);
}
uint64_t helper_fnmsub_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2,
uint64_t frs3)
{
return float64_muladd(frs1, frs2, frs3, float_muladd_negate_product,
&env->fp_status);
}
uint64_t helper_fnmadd_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2,
uint64_t frs3)
{
return float32_muladd(frs1, frs2, frs3, float_muladd_negate_c |
float_muladd_negate_product, &env->fp_status);
}
uint64_t helper_fnmadd_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2,
uint64_t frs3)
{
return float64_muladd(frs1, frs2, frs3, float_muladd_negate_c |
float_muladd_negate_product, &env->fp_status);
}
uint64_t helper_fadd_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float32_add(frs1, frs2, &env->fp_status);
}
uint64_t helper_fsub_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float32_sub(frs1, frs2, &env->fp_status);
}
uint64_t helper_fmul_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float32_mul(frs1, frs2, &env->fp_status);
}
uint64_t helper_fdiv_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float32_div(frs1, frs2, &env->fp_status);
}
uint64_t helper_fmin_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float32_minnum(frs1, frs2, &env->fp_status);
}
uint64_t helper_fmax_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float32_maxnum(frs1, frs2, &env->fp_status);
}
uint64_t helper_fsqrt_s(CPURISCVState *env, uint64_t frs1)
{
return float32_sqrt(frs1, &env->fp_status);
}
target_ulong helper_fle_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float32_le(frs1, frs2, &env->fp_status);
}
target_ulong helper_flt_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float32_lt(frs1, frs2, &env->fp_status);
}
target_ulong helper_feq_s(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float32_eq_quiet(frs1, frs2, &env->fp_status);
}
target_ulong helper_fcvt_w_s(CPURISCVState *env, uint64_t frs1)
{
return float32_to_int32(frs1, &env->fp_status);
}
target_ulong helper_fcvt_wu_s(CPURISCVState *env, uint64_t frs1)
{
return (int32_t)float32_to_uint32(frs1, &env->fp_status);
}
#if defined(TARGET_RISCV64)
uint64_t helper_fcvt_l_s(CPURISCVState *env, uint64_t frs1)
{
return float32_to_int64(frs1, &env->fp_status);
}
uint64_t helper_fcvt_lu_s(CPURISCVState *env, uint64_t frs1)
{
return float32_to_uint64(frs1, &env->fp_status);
}
#endif
uint64_t helper_fcvt_s_w(CPURISCVState *env, target_ulong rs1)
{
return int32_to_float32((int32_t)rs1, &env->fp_status);
}
uint64_t helper_fcvt_s_wu(CPURISCVState *env, target_ulong rs1)
{
return uint32_to_float32((uint32_t)rs1, &env->fp_status);
}
#if defined(TARGET_RISCV64)
uint64_t helper_fcvt_s_l(CPURISCVState *env, uint64_t rs1)
{
return int64_to_float32(rs1, &env->fp_status);
}
uint64_t helper_fcvt_s_lu(CPURISCVState *env, uint64_t rs1)
{
return uint64_to_float32(rs1, &env->fp_status);
}
#endif
target_ulong helper_fclass_s(uint64_t frs1)
{
float32 f = frs1;
bool sign = float32_is_neg(f);
if (float32_is_infinity(f)) {
return sign ? 1 << 0 : 1 << 7;
} else if (float32_is_zero(f)) {
return sign ? 1 << 3 : 1 << 4;
} else if (float32_is_zero_or_denormal(f)) {
return sign ? 1 << 2 : 1 << 5;
} else if (float32_is_any_nan(f)) {
float_status s = { }; /* for snan_bit_is_one */
return float32_is_quiet_nan(f, &s) ? 1 << 9 : 1 << 8;
} else {
return sign ? 1 << 1 : 1 << 6;
}
}
uint64_t helper_fadd_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float64_add(frs1, frs2, &env->fp_status);
}
uint64_t helper_fsub_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float64_sub(frs1, frs2, &env->fp_status);
}
uint64_t helper_fmul_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float64_mul(frs1, frs2, &env->fp_status);
}
uint64_t helper_fdiv_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float64_div(frs1, frs2, &env->fp_status);
}
uint64_t helper_fmin_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float64_minnum(frs1, frs2, &env->fp_status);
}
uint64_t helper_fmax_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float64_maxnum(frs1, frs2, &env->fp_status);
}
uint64_t helper_fcvt_s_d(CPURISCVState *env, uint64_t rs1)
{
rs1 = float64_to_float32(rs1, &env->fp_status);
return float32_maybe_silence_nan(rs1, &env->fp_status);
}
uint64_t helper_fcvt_d_s(CPURISCVState *env, uint64_t rs1)
{
rs1 = float32_to_float64(rs1, &env->fp_status);
return float64_maybe_silence_nan(rs1, &env->fp_status);
}
uint64_t helper_fsqrt_d(CPURISCVState *env, uint64_t frs1)
{
return float64_sqrt(frs1, &env->fp_status);
}
target_ulong helper_fle_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float64_le(frs1, frs2, &env->fp_status);
}
target_ulong helper_flt_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float64_lt(frs1, frs2, &env->fp_status);
}
target_ulong helper_feq_d(CPURISCVState *env, uint64_t frs1, uint64_t frs2)
{
return float64_eq_quiet(frs1, frs2, &env->fp_status);
}
target_ulong helper_fcvt_w_d(CPURISCVState *env, uint64_t frs1)
{
return float64_to_int32(frs1, &env->fp_status);
}
target_ulong helper_fcvt_wu_d(CPURISCVState *env, uint64_t frs1)
{
return (int32_t)float64_to_uint32(frs1, &env->fp_status);
}
#if defined(TARGET_RISCV64)
uint64_t helper_fcvt_l_d(CPURISCVState *env, uint64_t frs1)
{
return float64_to_int64(frs1, &env->fp_status);
}
uint64_t helper_fcvt_lu_d(CPURISCVState *env, uint64_t frs1)
{
return float64_to_uint64(frs1, &env->fp_status);
}
#endif
uint64_t helper_fcvt_d_w(CPURISCVState *env, target_ulong rs1)
{
return int32_to_float64((int32_t)rs1, &env->fp_status);
}
uint64_t helper_fcvt_d_wu(CPURISCVState *env, target_ulong rs1)
{
return uint32_to_float64((uint32_t)rs1, &env->fp_status);
}
#if defined(TARGET_RISCV64)
uint64_t helper_fcvt_d_l(CPURISCVState *env, uint64_t rs1)
{
return int64_to_float64(rs1, &env->fp_status);
}
uint64_t helper_fcvt_d_lu(CPURISCVState *env, uint64_t rs1)
{
return uint64_to_float64(rs1, &env->fp_status);
}
#endif
target_ulong helper_fclass_d(uint64_t frs1)
{
float64 f = frs1;
bool sign = float64_is_neg(f);
if (float64_is_infinity(f)) {
return sign ? 1 << 0 : 1 << 7;
} else if (float64_is_zero(f)) {
return sign ? 1 << 3 : 1 << 4;
} else if (float64_is_zero_or_denormal(f)) {
return sign ? 1 << 2 : 1 << 5;
} else if (float64_is_any_nan(f)) {
float_status s = { }; /* for snan_bit_is_one */
return float64_is_quiet_nan(f, &s) ? 1 << 9 : 1 << 8;
} else {
return sign ? 1 << 1 : 1 << 6;
}
}

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/*
* RISC-V GDB Server Stub
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "exec/gdbstub.h"
#include "cpu.h"
int riscv_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
{
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
if (n < 32) {
return gdb_get_regl(mem_buf, env->gpr[n]);
} else if (n == 32) {
return gdb_get_regl(mem_buf, env->pc);
} else if (n < 65) {
return gdb_get_reg64(mem_buf, env->fpr[n - 33]);
} else if (n < 4096 + 65) {
return gdb_get_regl(mem_buf, csr_read_helper(env, n - 65));
}
return 0;
}
int riscv_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
{
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
if (n == 0) {
/* discard writes to x0 */
return sizeof(target_ulong);
} else if (n < 32) {
env->gpr[n] = ldtul_p(mem_buf);
return sizeof(target_ulong);
} else if (n == 32) {
env->pc = ldtul_p(mem_buf);
return sizeof(target_ulong);
} else if (n < 65) {
env->fpr[n - 33] = ldq_p(mem_buf); /* always 64-bit */
return sizeof(uint64_t);
} else if (n < 4096 + 65) {
csr_write_helper(env, ldtul_p(mem_buf), n - 65);
}
return 0;
}

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/*
* RISC-V emulation helpers for qemu.
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017-2018 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "tcg-op.h"
#define RISCV_DEBUG_INTERRUPT 0
int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch)
{
#ifdef CONFIG_USER_ONLY
return 0;
#else
return env->priv;
#endif
}
#ifndef CONFIG_USER_ONLY
/*
* Return RISC-V IRQ number if an interrupt should be taken, else -1.
* Used in cpu-exec.c
*
* Adapted from Spike's processor_t::take_interrupt()
*/
static int riscv_cpu_hw_interrupts_pending(CPURISCVState *env)
{
target_ulong pending_interrupts = atomic_read(&env->mip) & env->mie;
target_ulong mie = get_field(env->mstatus, MSTATUS_MIE);
target_ulong m_enabled = env->priv < PRV_M || (env->priv == PRV_M && mie);
target_ulong enabled_interrupts = pending_interrupts &
~env->mideleg & -m_enabled;
target_ulong sie = get_field(env->mstatus, MSTATUS_SIE);
target_ulong s_enabled = env->priv < PRV_S || (env->priv == PRV_S && sie);
enabled_interrupts |= pending_interrupts & env->mideleg &
-s_enabled;
if (enabled_interrupts) {
return ctz64(enabled_interrupts); /* since non-zero */
} else {
return EXCP_NONE; /* indicates no pending interrupt */
}
}
#endif
bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
{
#if !defined(CONFIG_USER_ONLY)
if (interrupt_request & CPU_INTERRUPT_HARD) {
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
int interruptno = riscv_cpu_hw_interrupts_pending(env);
if (interruptno >= 0) {
cs->exception_index = RISCV_EXCP_INT_FLAG | interruptno;
riscv_cpu_do_interrupt(cs);
return true;
}
}
#endif
return false;
}
#if !defined(CONFIG_USER_ONLY)
/* get_physical_address - get the physical address for this virtual address
*
* Do a page table walk to obtain the physical address corresponding to a
* virtual address. Returns 0 if the translation was successful
*
* Adapted from Spike's mmu_t::translate and mmu_t::walk
*
*/
static int get_physical_address(CPURISCVState *env, hwaddr *physical,
int *prot, target_ulong addr,
int access_type, int mmu_idx)
{
/* NOTE: the env->pc value visible here will not be
* correct, but the value visible to the exception handler
* (riscv_cpu_do_interrupt) is correct */
int mode = mmu_idx;
if (mode == PRV_M && access_type != MMU_INST_FETCH) {
if (get_field(env->mstatus, MSTATUS_MPRV)) {
mode = get_field(env->mstatus, MSTATUS_MPP);
}
}
if (mode == PRV_M || !riscv_feature(env, RISCV_FEATURE_MMU)) {
*physical = addr;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return TRANSLATE_SUCCESS;
}
*prot = 0;
target_ulong base;
int levels, ptidxbits, ptesize, vm, sum;
int mxr = get_field(env->mstatus, MSTATUS_MXR);
if (env->priv_ver >= PRIV_VERSION_1_10_0) {
base = get_field(env->satp, SATP_PPN) << PGSHIFT;
sum = get_field(env->mstatus, MSTATUS_SUM);
vm = get_field(env->satp, SATP_MODE);
switch (vm) {
case VM_1_10_SV32:
levels = 2; ptidxbits = 10; ptesize = 4; break;
case VM_1_10_SV39:
levels = 3; ptidxbits = 9; ptesize = 8; break;
case VM_1_10_SV48:
levels = 4; ptidxbits = 9; ptesize = 8; break;
case VM_1_10_SV57:
levels = 5; ptidxbits = 9; ptesize = 8; break;
case VM_1_10_MBARE:
*physical = addr;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return TRANSLATE_SUCCESS;
default:
g_assert_not_reached();
}
} else {
base = env->sptbr << PGSHIFT;
sum = !get_field(env->mstatus, MSTATUS_PUM);
vm = get_field(env->mstatus, MSTATUS_VM);
switch (vm) {
case VM_1_09_SV32:
levels = 2; ptidxbits = 10; ptesize = 4; break;
case VM_1_09_SV39:
levels = 3; ptidxbits = 9; ptesize = 8; break;
case VM_1_09_SV48:
levels = 4; ptidxbits = 9; ptesize = 8; break;
case VM_1_09_MBARE:
*physical = addr;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return TRANSLATE_SUCCESS;
default:
g_assert_not_reached();
}
}
CPUState *cs = CPU(riscv_env_get_cpu(env));
int va_bits = PGSHIFT + levels * ptidxbits;
target_ulong mask = (1L << (TARGET_LONG_BITS - (va_bits - 1))) - 1;
target_ulong masked_msbs = (addr >> (va_bits - 1)) & mask;
if (masked_msbs != 0 && masked_msbs != mask) {
return TRANSLATE_FAIL;
}
int ptshift = (levels - 1) * ptidxbits;
int i;
#if !TCG_OVERSIZED_GUEST
restart:
#endif
for (i = 0; i < levels; i++, ptshift -= ptidxbits) {
target_ulong idx = (addr >> (PGSHIFT + ptshift)) &
((1 << ptidxbits) - 1);
/* check that physical address of PTE is legal */
target_ulong pte_addr = base + idx * ptesize;
#if defined(TARGET_RISCV32)
target_ulong pte = ldl_phys(cs->as, pte_addr);
#elif defined(TARGET_RISCV64)
target_ulong pte = ldq_phys(cs->as, pte_addr);
#endif
target_ulong ppn = pte >> PTE_PPN_SHIFT;
if (PTE_TABLE(pte)) { /* next level of page table */
base = ppn << PGSHIFT;
} else if ((pte & PTE_U) ? (mode == PRV_S) && !sum : !(mode == PRV_S)) {
break;
} else if (!(pte & PTE_V) || (!(pte & PTE_R) && (pte & PTE_W))) {
break;
} else if (access_type == MMU_INST_FETCH ? !(pte & PTE_X) :
access_type == MMU_DATA_LOAD ? !(pte & PTE_R) &&
!(mxr && (pte & PTE_X)) : !((pte & PTE_R) && (pte & PTE_W))) {
break;
} else {
/* if necessary, set accessed and dirty bits. */
target_ulong updated_pte = pte | PTE_A |
(access_type == MMU_DATA_STORE ? PTE_D : 0);
/* Page table updates need to be atomic with MTTCG enabled */
if (updated_pte != pte) {
/* if accessed or dirty bits need updating, and the PTE is
* in RAM, then we do so atomically with a compare and swap.
* if the PTE is in IO space, then it can't be updated.
* if the PTE changed, then we must re-walk the page table
as the PTE is no longer valid */
MemoryRegion *mr;
hwaddr l = sizeof(target_ulong), addr1;
mr = address_space_translate(cs->as, pte_addr,
&addr1, &l, false);
if (memory_access_is_direct(mr, true)) {
target_ulong *pte_pa =
qemu_map_ram_ptr(mr->ram_block, addr1);
#if TCG_OVERSIZED_GUEST
/* MTTCG is not enabled on oversized TCG guests so
* page table updates do not need to be atomic */
*pte_pa = pte = updated_pte;
#else
target_ulong old_pte =
atomic_cmpxchg(pte_pa, pte, updated_pte);
if (old_pte != pte) {
goto restart;
} else {
pte = updated_pte;
}
#endif
} else {
/* misconfigured PTE in ROM (AD bits are not preset) or
* PTE is in IO space and can't be updated atomically */
return TRANSLATE_FAIL;
}
}
/* for superpage mappings, make a fake leaf PTE for the TLB's
benefit. */
target_ulong vpn = addr >> PGSHIFT;
*physical = (ppn | (vpn & ((1L << ptshift) - 1))) << PGSHIFT;
if ((pte & PTE_R)) {
*prot |= PAGE_READ;
}
if ((pte & PTE_X)) {
*prot |= PAGE_EXEC;
}
/* only add write permission on stores or if the page
is already dirty, so that we don't miss further
page table walks to update the dirty bit */
if ((pte & PTE_W) &&
(access_type == MMU_DATA_STORE || (pte & PTE_D))) {
*prot |= PAGE_WRITE;
}
return TRANSLATE_SUCCESS;
}
}
return TRANSLATE_FAIL;
}
static void raise_mmu_exception(CPURISCVState *env, target_ulong address,
MMUAccessType access_type)
{
CPUState *cs = CPU(riscv_env_get_cpu(env));
int page_fault_exceptions =
(env->priv_ver >= PRIV_VERSION_1_10_0) &&
get_field(env->satp, SATP_MODE) != VM_1_10_MBARE;
switch (access_type) {
case MMU_INST_FETCH:
cs->exception_index = page_fault_exceptions ?
RISCV_EXCP_INST_PAGE_FAULT : RISCV_EXCP_INST_ACCESS_FAULT;
break;
case MMU_DATA_LOAD:
cs->exception_index = page_fault_exceptions ?
RISCV_EXCP_LOAD_PAGE_FAULT : RISCV_EXCP_LOAD_ACCESS_FAULT;
break;
case MMU_DATA_STORE:
cs->exception_index = page_fault_exceptions ?
RISCV_EXCP_STORE_PAGE_FAULT : RISCV_EXCP_STORE_AMO_ACCESS_FAULT;
break;
default:
g_assert_not_reached();
}
env->badaddr = address;
}
hwaddr riscv_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
{
RISCVCPU *cpu = RISCV_CPU(cs);
hwaddr phys_addr;
int prot;
int mmu_idx = cpu_mmu_index(&cpu->env, false);
if (get_physical_address(&cpu->env, &phys_addr, &prot, addr, 0, mmu_idx)) {
return -1;
}
return phys_addr;
}
void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
MMUAccessType access_type, int mmu_idx,
uintptr_t retaddr)
{
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
switch (access_type) {
case MMU_INST_FETCH:
cs->exception_index = RISCV_EXCP_INST_ADDR_MIS;
break;
case MMU_DATA_LOAD:
cs->exception_index = RISCV_EXCP_LOAD_ADDR_MIS;
break;
case MMU_DATA_STORE:
cs->exception_index = RISCV_EXCP_STORE_AMO_ADDR_MIS;
break;
default:
g_assert_not_reached();
}
env->badaddr = addr;
do_raise_exception_err(env, cs->exception_index, retaddr);
}
/* called by qemu's softmmu to fill the qemu tlb */
void tlb_fill(CPUState *cs, target_ulong addr, int size,
MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
{
int ret;
ret = riscv_cpu_handle_mmu_fault(cs, addr, size, access_type, mmu_idx);
if (ret == TRANSLATE_FAIL) {
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
do_raise_exception_err(env, cs->exception_index, retaddr);
}
}
#endif
int riscv_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int size,
int rw, int mmu_idx)
{
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
#if !defined(CONFIG_USER_ONLY)
hwaddr pa = 0;
int prot;
#endif
int ret = TRANSLATE_FAIL;
qemu_log_mask(CPU_LOG_MMU,
"%s pc " TARGET_FMT_lx " ad %" VADDR_PRIx " rw %d mmu_idx \
%d\n", __func__, env->pc, address, rw, mmu_idx);
#if !defined(CONFIG_USER_ONLY)
ret = get_physical_address(env, &pa, &prot, address, rw, mmu_idx);
qemu_log_mask(CPU_LOG_MMU,
"%s address=%" VADDR_PRIx " ret %d physical " TARGET_FMT_plx
" prot %d\n", __func__, address, ret, pa, prot);
if (!pmp_hart_has_privs(env, pa, TARGET_PAGE_SIZE, 1 << rw)) {
ret = TRANSLATE_FAIL;
}
if (ret == TRANSLATE_SUCCESS) {
tlb_set_page(cs, address & TARGET_PAGE_MASK, pa & TARGET_PAGE_MASK,
prot, mmu_idx, TARGET_PAGE_SIZE);
} else if (ret == TRANSLATE_FAIL) {
raise_mmu_exception(env, address, rw);
}
#else
switch (rw) {
case MMU_INST_FETCH:
cs->exception_index = RISCV_EXCP_INST_PAGE_FAULT;
break;
case MMU_DATA_LOAD:
cs->exception_index = RISCV_EXCP_LOAD_PAGE_FAULT;
break;
case MMU_DATA_STORE:
cs->exception_index = RISCV_EXCP_STORE_PAGE_FAULT;
break;
}
#endif
return ret;
}
/*
* Handle Traps
*
* Adapted from Spike's processor_t::take_trap.
*
*/
void riscv_cpu_do_interrupt(CPUState *cs)
{
#if !defined(CONFIG_USER_ONLY)
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
if (RISCV_DEBUG_INTERRUPT) {
int log_cause = cs->exception_index & RISCV_EXCP_INT_MASK;
if (cs->exception_index & RISCV_EXCP_INT_FLAG) {
qemu_log_mask(LOG_TRACE, "core 0: trap %s, epc 0x" TARGET_FMT_lx,
riscv_intr_names[log_cause], env->pc);
} else {
qemu_log_mask(LOG_TRACE, "core 0: intr %s, epc 0x" TARGET_FMT_lx,
riscv_excp_names[log_cause], env->pc);
}
}
target_ulong fixed_cause = 0;
if (cs->exception_index & (RISCV_EXCP_INT_FLAG)) {
/* hacky for now. the MSB (bit 63) indicates interrupt but cs->exception
index is only 32 bits wide */
fixed_cause = cs->exception_index & RISCV_EXCP_INT_MASK;
fixed_cause |= ((target_ulong)1) << (TARGET_LONG_BITS - 1);
} else {
/* fixup User ECALL -> correct priv ECALL */
if (cs->exception_index == RISCV_EXCP_U_ECALL) {
switch (env->priv) {
case PRV_U:
fixed_cause = RISCV_EXCP_U_ECALL;
break;
case PRV_S:
fixed_cause = RISCV_EXCP_S_ECALL;
break;
case PRV_H:
fixed_cause = RISCV_EXCP_H_ECALL;
break;
case PRV_M:
fixed_cause = RISCV_EXCP_M_ECALL;
break;
}
} else {
fixed_cause = cs->exception_index;
}
}
target_ulong backup_epc = env->pc;
target_ulong bit = fixed_cause;
target_ulong deleg = env->medeleg;
int hasbadaddr =
(fixed_cause == RISCV_EXCP_INST_ADDR_MIS) ||
(fixed_cause == RISCV_EXCP_INST_ACCESS_FAULT) ||
(fixed_cause == RISCV_EXCP_LOAD_ADDR_MIS) ||
(fixed_cause == RISCV_EXCP_STORE_AMO_ADDR_MIS) ||
(fixed_cause == RISCV_EXCP_LOAD_ACCESS_FAULT) ||
(fixed_cause == RISCV_EXCP_STORE_AMO_ACCESS_FAULT) ||
(fixed_cause == RISCV_EXCP_INST_PAGE_FAULT) ||
(fixed_cause == RISCV_EXCP_LOAD_PAGE_FAULT) ||
(fixed_cause == RISCV_EXCP_STORE_PAGE_FAULT);
if (bit & ((target_ulong)1 << (TARGET_LONG_BITS - 1))) {
deleg = env->mideleg;
bit &= ~((target_ulong)1 << (TARGET_LONG_BITS - 1));
}
if (env->priv <= PRV_S && bit < 64 && ((deleg >> bit) & 1)) {
/* handle the trap in S-mode */
/* No need to check STVEC for misaligned - lower 2 bits cannot be set */
env->pc = env->stvec;
env->scause = fixed_cause;
env->sepc = backup_epc;
if (hasbadaddr) {
if (RISCV_DEBUG_INTERRUPT) {
qemu_log_mask(LOG_TRACE, "core " TARGET_FMT_ld
": badaddr 0x" TARGET_FMT_lx, env->mhartid, env->badaddr);
}
env->sbadaddr = env->badaddr;
}
target_ulong s = env->mstatus;
s = set_field(s, MSTATUS_SPIE, env->priv_ver >= PRIV_VERSION_1_10_0 ?
get_field(s, MSTATUS_SIE) : get_field(s, MSTATUS_UIE << env->priv));
s = set_field(s, MSTATUS_SPP, env->priv);
s = set_field(s, MSTATUS_SIE, 0);
csr_write_helper(env, s, CSR_MSTATUS);
riscv_set_mode(env, PRV_S);
} else {
/* No need to check MTVEC for misaligned - lower 2 bits cannot be set */
env->pc = env->mtvec;
env->mepc = backup_epc;
env->mcause = fixed_cause;
if (hasbadaddr) {
if (RISCV_DEBUG_INTERRUPT) {
qemu_log_mask(LOG_TRACE, "core " TARGET_FMT_ld
": badaddr 0x" TARGET_FMT_lx, env->mhartid, env->badaddr);
}
env->mbadaddr = env->badaddr;
}
target_ulong s = env->mstatus;
s = set_field(s, MSTATUS_MPIE, env->priv_ver >= PRIV_VERSION_1_10_0 ?
get_field(s, MSTATUS_MIE) : get_field(s, MSTATUS_UIE << env->priv));
s = set_field(s, MSTATUS_MPP, env->priv);
s = set_field(s, MSTATUS_MIE, 0);
csr_write_helper(env, s, CSR_MSTATUS);
riscv_set_mode(env, PRV_M);
}
/* TODO yield load reservation */
#endif
cs->exception_index = EXCP_NONE; /* mark handled to qemu */
}

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/* Exceptions */
DEF_HELPER_2(raise_exception, noreturn, env, i32)
/* Floating Point - rounding mode */
DEF_HELPER_FLAGS_2(set_rounding_mode, TCG_CALL_NO_WG, void, env, i32)
/* Floating Point - fused */
DEF_HELPER_FLAGS_4(fmadd_s, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
DEF_HELPER_FLAGS_4(fmadd_d, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
DEF_HELPER_FLAGS_4(fmsub_s, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
DEF_HELPER_FLAGS_4(fmsub_d, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
DEF_HELPER_FLAGS_4(fnmsub_s, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
DEF_HELPER_FLAGS_4(fnmsub_d, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
DEF_HELPER_FLAGS_4(fnmadd_s, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
DEF_HELPER_FLAGS_4(fnmadd_d, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
/* Floating Point - Single Precision */
DEF_HELPER_FLAGS_3(fadd_s, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_3(fsub_s, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_3(fmul_s, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_3(fdiv_s, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_3(fmin_s, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_3(fmax_s, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_2(fsqrt_s, TCG_CALL_NO_RWG, i64, env, i64)
DEF_HELPER_FLAGS_3(fle_s, TCG_CALL_NO_RWG, tl, env, i64, i64)
DEF_HELPER_FLAGS_3(flt_s, TCG_CALL_NO_RWG, tl, env, i64, i64)
DEF_HELPER_FLAGS_3(feq_s, TCG_CALL_NO_RWG, tl, env, i64, i64)
DEF_HELPER_FLAGS_2(fcvt_w_s, TCG_CALL_NO_RWG, tl, env, i64)
DEF_HELPER_FLAGS_2(fcvt_wu_s, TCG_CALL_NO_RWG, tl, env, i64)
#if defined(TARGET_RISCV64)
DEF_HELPER_FLAGS_2(fcvt_l_s, TCG_CALL_NO_RWG, tl, env, i64)
DEF_HELPER_FLAGS_2(fcvt_lu_s, TCG_CALL_NO_RWG, tl, env, i64)
#endif
DEF_HELPER_FLAGS_2(fcvt_s_w, TCG_CALL_NO_RWG, i64, env, tl)
DEF_HELPER_FLAGS_2(fcvt_s_wu, TCG_CALL_NO_RWG, i64, env, tl)
#if defined(TARGET_RISCV64)
DEF_HELPER_FLAGS_2(fcvt_s_l, TCG_CALL_NO_RWG, i64, env, tl)
DEF_HELPER_FLAGS_2(fcvt_s_lu, TCG_CALL_NO_RWG, i64, env, tl)
#endif
DEF_HELPER_FLAGS_1(fclass_s, TCG_CALL_NO_RWG_SE, tl, i64)
/* Floating Point - Double Precision */
DEF_HELPER_FLAGS_3(fadd_d, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_3(fsub_d, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_3(fmul_d, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_3(fdiv_d, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_3(fmin_d, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_3(fmax_d, TCG_CALL_NO_RWG, i64, env, i64, i64)
DEF_HELPER_FLAGS_2(fcvt_s_d, TCG_CALL_NO_RWG, i64, env, i64)
DEF_HELPER_FLAGS_2(fcvt_d_s, TCG_CALL_NO_RWG, i64, env, i64)
DEF_HELPER_FLAGS_2(fsqrt_d, TCG_CALL_NO_RWG, i64, env, i64)
DEF_HELPER_FLAGS_3(fle_d, TCG_CALL_NO_RWG, tl, env, i64, i64)
DEF_HELPER_FLAGS_3(flt_d, TCG_CALL_NO_RWG, tl, env, i64, i64)
DEF_HELPER_FLAGS_3(feq_d, TCG_CALL_NO_RWG, tl, env, i64, i64)
DEF_HELPER_FLAGS_2(fcvt_w_d, TCG_CALL_NO_RWG, tl, env, i64)
DEF_HELPER_FLAGS_2(fcvt_wu_d, TCG_CALL_NO_RWG, tl, env, i64)
#if defined(TARGET_RISCV64)
DEF_HELPER_FLAGS_2(fcvt_l_d, TCG_CALL_NO_RWG, tl, env, i64)
DEF_HELPER_FLAGS_2(fcvt_lu_d, TCG_CALL_NO_RWG, tl, env, i64)
#endif
DEF_HELPER_FLAGS_2(fcvt_d_w, TCG_CALL_NO_RWG, i64, env, tl)
DEF_HELPER_FLAGS_2(fcvt_d_wu, TCG_CALL_NO_RWG, i64, env, tl)
#if defined(TARGET_RISCV64)
DEF_HELPER_FLAGS_2(fcvt_d_l, TCG_CALL_NO_RWG, i64, env, tl)
DEF_HELPER_FLAGS_2(fcvt_d_lu, TCG_CALL_NO_RWG, i64, env, tl)
#endif
DEF_HELPER_FLAGS_1(fclass_d, TCG_CALL_NO_RWG_SE, tl, i64)
/* Special functions */
DEF_HELPER_3(csrrw, tl, env, tl, tl)
DEF_HELPER_4(csrrs, tl, env, tl, tl, tl)
DEF_HELPER_4(csrrc, tl, env, tl, tl, tl)
#ifndef CONFIG_USER_ONLY
DEF_HELPER_2(sret, tl, env, tl)
DEF_HELPER_2(mret, tl, env, tl)
DEF_HELPER_1(wfi, void, env)
DEF_HELPER_1(tlb_flush, void, env)
#endif

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/*
* RISC-V emulation for qemu: Instruction decode helpers
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define MASK_OP_MAJOR(op) (op & 0x7F)
enum {
/* rv32i, rv64i, rv32m */
OPC_RISC_LUI = (0x37),
OPC_RISC_AUIPC = (0x17),
OPC_RISC_JAL = (0x6F),
OPC_RISC_JALR = (0x67),
OPC_RISC_BRANCH = (0x63),
OPC_RISC_LOAD = (0x03),
OPC_RISC_STORE = (0x23),
OPC_RISC_ARITH_IMM = (0x13),
OPC_RISC_ARITH = (0x33),
OPC_RISC_FENCE = (0x0F),
OPC_RISC_SYSTEM = (0x73),
/* rv64i, rv64m */
OPC_RISC_ARITH_IMM_W = (0x1B),
OPC_RISC_ARITH_W = (0x3B),
/* rv32a, rv64a */
OPC_RISC_ATOMIC = (0x2F),
/* floating point */
OPC_RISC_FP_LOAD = (0x7),
OPC_RISC_FP_STORE = (0x27),
OPC_RISC_FMADD = (0x43),
OPC_RISC_FMSUB = (0x47),
OPC_RISC_FNMSUB = (0x4B),
OPC_RISC_FNMADD = (0x4F),
OPC_RISC_FP_ARITH = (0x53),
};
#define MASK_OP_ARITH(op) (MASK_OP_MAJOR(op) | (op & ((0x7 << 12) | \
(0x7F << 25))))
enum {
OPC_RISC_ADD = OPC_RISC_ARITH | (0x0 << 12) | (0x00 << 25),
OPC_RISC_SUB = OPC_RISC_ARITH | (0x0 << 12) | (0x20 << 25),
OPC_RISC_SLL = OPC_RISC_ARITH | (0x1 << 12) | (0x00 << 25),
OPC_RISC_SLT = OPC_RISC_ARITH | (0x2 << 12) | (0x00 << 25),
OPC_RISC_SLTU = OPC_RISC_ARITH | (0x3 << 12) | (0x00 << 25),
OPC_RISC_XOR = OPC_RISC_ARITH | (0x4 << 12) | (0x00 << 25),
OPC_RISC_SRL = OPC_RISC_ARITH | (0x5 << 12) | (0x00 << 25),
OPC_RISC_SRA = OPC_RISC_ARITH | (0x5 << 12) | (0x20 << 25),
OPC_RISC_OR = OPC_RISC_ARITH | (0x6 << 12) | (0x00 << 25),
OPC_RISC_AND = OPC_RISC_ARITH | (0x7 << 12) | (0x00 << 25),
/* RV64M */
OPC_RISC_MUL = OPC_RISC_ARITH | (0x0 << 12) | (0x01 << 25),
OPC_RISC_MULH = OPC_RISC_ARITH | (0x1 << 12) | (0x01 << 25),
OPC_RISC_MULHSU = OPC_RISC_ARITH | (0x2 << 12) | (0x01 << 25),
OPC_RISC_MULHU = OPC_RISC_ARITH | (0x3 << 12) | (0x01 << 25),
OPC_RISC_DIV = OPC_RISC_ARITH | (0x4 << 12) | (0x01 << 25),
OPC_RISC_DIVU = OPC_RISC_ARITH | (0x5 << 12) | (0x01 << 25),
OPC_RISC_REM = OPC_RISC_ARITH | (0x6 << 12) | (0x01 << 25),
OPC_RISC_REMU = OPC_RISC_ARITH | (0x7 << 12) | (0x01 << 25),
};
#define MASK_OP_ARITH_IMM(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_ADDI = OPC_RISC_ARITH_IMM | (0x0 << 12),
OPC_RISC_SLTI = OPC_RISC_ARITH_IMM | (0x2 << 12),
OPC_RISC_SLTIU = OPC_RISC_ARITH_IMM | (0x3 << 12),
OPC_RISC_XORI = OPC_RISC_ARITH_IMM | (0x4 << 12),
OPC_RISC_ORI = OPC_RISC_ARITH_IMM | (0x6 << 12),
OPC_RISC_ANDI = OPC_RISC_ARITH_IMM | (0x7 << 12),
OPC_RISC_SLLI = OPC_RISC_ARITH_IMM | (0x1 << 12), /* additional part of
IMM */
OPC_RISC_SHIFT_RIGHT_I = OPC_RISC_ARITH_IMM | (0x5 << 12) /* SRAI, SRLI */
};
#define MASK_OP_BRANCH(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_BEQ = OPC_RISC_BRANCH | (0x0 << 12),
OPC_RISC_BNE = OPC_RISC_BRANCH | (0x1 << 12),
OPC_RISC_BLT = OPC_RISC_BRANCH | (0x4 << 12),
OPC_RISC_BGE = OPC_RISC_BRANCH | (0x5 << 12),
OPC_RISC_BLTU = OPC_RISC_BRANCH | (0x6 << 12),
OPC_RISC_BGEU = OPC_RISC_BRANCH | (0x7 << 12)
};
enum {
OPC_RISC_ADDIW = OPC_RISC_ARITH_IMM_W | (0x0 << 12),
OPC_RISC_SLLIW = OPC_RISC_ARITH_IMM_W | (0x1 << 12), /* additional part of
IMM */
OPC_RISC_SHIFT_RIGHT_IW = OPC_RISC_ARITH_IMM_W | (0x5 << 12) /* SRAI, SRLI
*/
};
enum {
OPC_RISC_ADDW = OPC_RISC_ARITH_W | (0x0 << 12) | (0x00 << 25),
OPC_RISC_SUBW = OPC_RISC_ARITH_W | (0x0 << 12) | (0x20 << 25),
OPC_RISC_SLLW = OPC_RISC_ARITH_W | (0x1 << 12) | (0x00 << 25),
OPC_RISC_SRLW = OPC_RISC_ARITH_W | (0x5 << 12) | (0x00 << 25),
OPC_RISC_SRAW = OPC_RISC_ARITH_W | (0x5 << 12) | (0x20 << 25),
/* RV64M */
OPC_RISC_MULW = OPC_RISC_ARITH_W | (0x0 << 12) | (0x01 << 25),
OPC_RISC_DIVW = OPC_RISC_ARITH_W | (0x4 << 12) | (0x01 << 25),
OPC_RISC_DIVUW = OPC_RISC_ARITH_W | (0x5 << 12) | (0x01 << 25),
OPC_RISC_REMW = OPC_RISC_ARITH_W | (0x6 << 12) | (0x01 << 25),
OPC_RISC_REMUW = OPC_RISC_ARITH_W | (0x7 << 12) | (0x01 << 25),
};
#define MASK_OP_LOAD(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_LB = OPC_RISC_LOAD | (0x0 << 12),
OPC_RISC_LH = OPC_RISC_LOAD | (0x1 << 12),
OPC_RISC_LW = OPC_RISC_LOAD | (0x2 << 12),
OPC_RISC_LD = OPC_RISC_LOAD | (0x3 << 12),
OPC_RISC_LBU = OPC_RISC_LOAD | (0x4 << 12),
OPC_RISC_LHU = OPC_RISC_LOAD | (0x5 << 12),
OPC_RISC_LWU = OPC_RISC_LOAD | (0x6 << 12),
};
#define MASK_OP_STORE(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_SB = OPC_RISC_STORE | (0x0 << 12),
OPC_RISC_SH = OPC_RISC_STORE | (0x1 << 12),
OPC_RISC_SW = OPC_RISC_STORE | (0x2 << 12),
OPC_RISC_SD = OPC_RISC_STORE | (0x3 << 12),
};
#define MASK_OP_JALR(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
/* no enum since OPC_RISC_JALR is the actual value */
#define MASK_OP_ATOMIC(op) \
(MASK_OP_MAJOR(op) | (op & ((0x7 << 12) | (0x7F << 25))))
#define MASK_OP_ATOMIC_NO_AQ_RL_SZ(op) \
(MASK_OP_MAJOR(op) | (op & (0x1F << 27)))
enum {
OPC_RISC_LR = OPC_RISC_ATOMIC | (0x02 << 27),
OPC_RISC_SC = OPC_RISC_ATOMIC | (0x03 << 27),
OPC_RISC_AMOSWAP = OPC_RISC_ATOMIC | (0x01 << 27),
OPC_RISC_AMOADD = OPC_RISC_ATOMIC | (0x00 << 27),
OPC_RISC_AMOXOR = OPC_RISC_ATOMIC | (0x04 << 27),
OPC_RISC_AMOAND = OPC_RISC_ATOMIC | (0x0C << 27),
OPC_RISC_AMOOR = OPC_RISC_ATOMIC | (0x08 << 27),
OPC_RISC_AMOMIN = OPC_RISC_ATOMIC | (0x10 << 27),
OPC_RISC_AMOMAX = OPC_RISC_ATOMIC | (0x14 << 27),
OPC_RISC_AMOMINU = OPC_RISC_ATOMIC | (0x18 << 27),
OPC_RISC_AMOMAXU = OPC_RISC_ATOMIC | (0x1C << 27),
};
#define MASK_OP_SYSTEM(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_ECALL = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_EBREAK = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_ERET = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_MRTS = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_MRTH = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_HRTS = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_WFI = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_SFENCEVM = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_CSRRW = OPC_RISC_SYSTEM | (0x1 << 12),
OPC_RISC_CSRRS = OPC_RISC_SYSTEM | (0x2 << 12),
OPC_RISC_CSRRC = OPC_RISC_SYSTEM | (0x3 << 12),
OPC_RISC_CSRRWI = OPC_RISC_SYSTEM | (0x5 << 12),
OPC_RISC_CSRRSI = OPC_RISC_SYSTEM | (0x6 << 12),
OPC_RISC_CSRRCI = OPC_RISC_SYSTEM | (0x7 << 12),
};
#define MASK_OP_FP_LOAD(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_FLW = OPC_RISC_FP_LOAD | (0x2 << 12),
OPC_RISC_FLD = OPC_RISC_FP_LOAD | (0x3 << 12),
};
#define MASK_OP_FP_STORE(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_FSW = OPC_RISC_FP_STORE | (0x2 << 12),
OPC_RISC_FSD = OPC_RISC_FP_STORE | (0x3 << 12),
};
#define MASK_OP_FP_FMADD(op) (MASK_OP_MAJOR(op) | (op & (0x3 << 25)))
enum {
OPC_RISC_FMADD_S = OPC_RISC_FMADD | (0x0 << 25),
OPC_RISC_FMADD_D = OPC_RISC_FMADD | (0x1 << 25),
};
#define MASK_OP_FP_FMSUB(op) (MASK_OP_MAJOR(op) | (op & (0x3 << 25)))
enum {
OPC_RISC_FMSUB_S = OPC_RISC_FMSUB | (0x0 << 25),
OPC_RISC_FMSUB_D = OPC_RISC_FMSUB | (0x1 << 25),
};
#define MASK_OP_FP_FNMADD(op) (MASK_OP_MAJOR(op) | (op & (0x3 << 25)))
enum {
OPC_RISC_FNMADD_S = OPC_RISC_FNMADD | (0x0 << 25),
OPC_RISC_FNMADD_D = OPC_RISC_FNMADD | (0x1 << 25),
};
#define MASK_OP_FP_FNMSUB(op) (MASK_OP_MAJOR(op) | (op & (0x3 << 25)))
enum {
OPC_RISC_FNMSUB_S = OPC_RISC_FNMSUB | (0x0 << 25),
OPC_RISC_FNMSUB_D = OPC_RISC_FNMSUB | (0x1 << 25),
};
#define MASK_OP_FP_ARITH(op) (MASK_OP_MAJOR(op) | (op & (0x7F << 25)))
enum {
/* float */
OPC_RISC_FADD_S = OPC_RISC_FP_ARITH | (0x0 << 25),
OPC_RISC_FSUB_S = OPC_RISC_FP_ARITH | (0x4 << 25),
OPC_RISC_FMUL_S = OPC_RISC_FP_ARITH | (0x8 << 25),
OPC_RISC_FDIV_S = OPC_RISC_FP_ARITH | (0xC << 25),
OPC_RISC_FSGNJ_S = OPC_RISC_FP_ARITH | (0x10 << 25),
OPC_RISC_FSGNJN_S = OPC_RISC_FP_ARITH | (0x10 << 25),
OPC_RISC_FSGNJX_S = OPC_RISC_FP_ARITH | (0x10 << 25),
OPC_RISC_FMIN_S = OPC_RISC_FP_ARITH | (0x14 << 25),
OPC_RISC_FMAX_S = OPC_RISC_FP_ARITH | (0x14 << 25),
OPC_RISC_FSQRT_S = OPC_RISC_FP_ARITH | (0x2C << 25),
OPC_RISC_FEQ_S = OPC_RISC_FP_ARITH | (0x50 << 25),
OPC_RISC_FLT_S = OPC_RISC_FP_ARITH | (0x50 << 25),
OPC_RISC_FLE_S = OPC_RISC_FP_ARITH | (0x50 << 25),
OPC_RISC_FCVT_W_S = OPC_RISC_FP_ARITH | (0x60 << 25),
OPC_RISC_FCVT_WU_S = OPC_RISC_FP_ARITH | (0x60 << 25),
OPC_RISC_FCVT_L_S = OPC_RISC_FP_ARITH | (0x60 << 25),
OPC_RISC_FCVT_LU_S = OPC_RISC_FP_ARITH | (0x60 << 25),
OPC_RISC_FCVT_S_W = OPC_RISC_FP_ARITH | (0x68 << 25),
OPC_RISC_FCVT_S_WU = OPC_RISC_FP_ARITH | (0x68 << 25),
OPC_RISC_FCVT_S_L = OPC_RISC_FP_ARITH | (0x68 << 25),
OPC_RISC_FCVT_S_LU = OPC_RISC_FP_ARITH | (0x68 << 25),
OPC_RISC_FMV_X_S = OPC_RISC_FP_ARITH | (0x70 << 25),
OPC_RISC_FCLASS_S = OPC_RISC_FP_ARITH | (0x70 << 25),
OPC_RISC_FMV_S_X = OPC_RISC_FP_ARITH | (0x78 << 25),
/* double */
OPC_RISC_FADD_D = OPC_RISC_FP_ARITH | (0x1 << 25),
OPC_RISC_FSUB_D = OPC_RISC_FP_ARITH | (0x5 << 25),
OPC_RISC_FMUL_D = OPC_RISC_FP_ARITH | (0x9 << 25),
OPC_RISC_FDIV_D = OPC_RISC_FP_ARITH | (0xD << 25),
OPC_RISC_FSGNJ_D = OPC_RISC_FP_ARITH | (0x11 << 25),
OPC_RISC_FSGNJN_D = OPC_RISC_FP_ARITH | (0x11 << 25),
OPC_RISC_FSGNJX_D = OPC_RISC_FP_ARITH | (0x11 << 25),
OPC_RISC_FMIN_D = OPC_RISC_FP_ARITH | (0x15 << 25),
OPC_RISC_FMAX_D = OPC_RISC_FP_ARITH | (0x15 << 25),
OPC_RISC_FCVT_S_D = OPC_RISC_FP_ARITH | (0x20 << 25),
OPC_RISC_FCVT_D_S = OPC_RISC_FP_ARITH | (0x21 << 25),
OPC_RISC_FSQRT_D = OPC_RISC_FP_ARITH | (0x2D << 25),
OPC_RISC_FEQ_D = OPC_RISC_FP_ARITH | (0x51 << 25),
OPC_RISC_FLT_D = OPC_RISC_FP_ARITH | (0x51 << 25),
OPC_RISC_FLE_D = OPC_RISC_FP_ARITH | (0x51 << 25),
OPC_RISC_FCVT_W_D = OPC_RISC_FP_ARITH | (0x61 << 25),
OPC_RISC_FCVT_WU_D = OPC_RISC_FP_ARITH | (0x61 << 25),
OPC_RISC_FCVT_L_D = OPC_RISC_FP_ARITH | (0x61 << 25),
OPC_RISC_FCVT_LU_D = OPC_RISC_FP_ARITH | (0x61 << 25),
OPC_RISC_FCVT_D_W = OPC_RISC_FP_ARITH | (0x69 << 25),
OPC_RISC_FCVT_D_WU = OPC_RISC_FP_ARITH | (0x69 << 25),
OPC_RISC_FCVT_D_L = OPC_RISC_FP_ARITH | (0x69 << 25),
OPC_RISC_FCVT_D_LU = OPC_RISC_FP_ARITH | (0x69 << 25),
OPC_RISC_FMV_X_D = OPC_RISC_FP_ARITH | (0x71 << 25),
OPC_RISC_FCLASS_D = OPC_RISC_FP_ARITH | (0x71 << 25),
OPC_RISC_FMV_D_X = OPC_RISC_FP_ARITH | (0x79 << 25),
};
#define GET_B_IMM(inst) ((extract32(inst, 8, 4) << 1) \
| (extract32(inst, 25, 6) << 5) \
| (extract32(inst, 7, 1) << 11) \
| (sextract64(inst, 31, 1) << 12))
#define GET_STORE_IMM(inst) ((extract32(inst, 7, 5)) \
| (sextract64(inst, 25, 7) << 5))
#define GET_JAL_IMM(inst) ((extract32(inst, 21, 10) << 1) \
| (extract32(inst, 20, 1) << 11) \
| (extract32(inst, 12, 8) << 12) \
| (sextract64(inst, 31, 1) << 20))
#define GET_RM(inst) extract32(inst, 12, 3)
#define GET_RS3(inst) extract32(inst, 27, 5)
#define GET_RS1(inst) extract32(inst, 15, 5)
#define GET_RS2(inst) extract32(inst, 20, 5)
#define GET_RD(inst) extract32(inst, 7, 5)
#define GET_IMM(inst) sextract64(inst, 20, 12)
/* RVC decoding macros */
#define GET_C_IMM(inst) (extract32(inst, 2, 5) \
| (sextract64(inst, 12, 1) << 5))
#define GET_C_ZIMM(inst) (extract32(inst, 2, 5) \
| (extract32(inst, 12, 1) << 5))
#define GET_C_ADDI4SPN_IMM(inst) ((extract32(inst, 6, 1) << 2) \
| (extract32(inst, 5, 1) << 3) \
| (extract32(inst, 11, 2) << 4) \
| (extract32(inst, 7, 4) << 6))
#define GET_C_ADDI16SP_IMM(inst) ((extract32(inst, 6, 1) << 4) \
| (extract32(inst, 2, 1) << 5) \
| (extract32(inst, 5, 1) << 6) \
| (extract32(inst, 3, 2) << 7) \
| (sextract64(inst, 12, 1) << 9))
#define GET_C_LWSP_IMM(inst) ((extract32(inst, 4, 3) << 2) \
| (extract32(inst, 12, 1) << 5) \
| (extract32(inst, 2, 2) << 6))
#define GET_C_LDSP_IMM(inst) ((extract32(inst, 5, 2) << 3) \
| (extract32(inst, 12, 1) << 5) \
| (extract32(inst, 2, 3) << 6))
#define GET_C_SWSP_IMM(inst) ((extract32(inst, 9, 4) << 2) \
| (extract32(inst, 7, 2) << 6))
#define GET_C_SDSP_IMM(inst) ((extract32(inst, 10, 3) << 3) \
| (extract32(inst, 7, 3) << 6))
#define GET_C_LW_IMM(inst) ((extract32(inst, 6, 1) << 2) \
| (extract32(inst, 10, 3) << 3) \
| (extract32(inst, 5, 1) << 6))
#define GET_C_LD_IMM(inst) ((extract32(inst, 10, 3) << 3) \
| (extract32(inst, 5, 2) << 6))
#define GET_C_J_IMM(inst) ((extract32(inst, 3, 3) << 1) \
| (extract32(inst, 11, 1) << 4) \
| (extract32(inst, 2, 1) << 5) \
| (extract32(inst, 7, 1) << 6) \
| (extract32(inst, 6, 1) << 7) \
| (extract32(inst, 9, 2) << 8) \
| (extract32(inst, 8, 1) << 10) \
| (sextract64(inst, 12, 1) << 11))
#define GET_C_B_IMM(inst) ((extract32(inst, 3, 2) << 1) \
| (extract32(inst, 10, 2) << 3) \
| (extract32(inst, 2, 1) << 5) \
| (extract32(inst, 5, 2) << 6) \
| (sextract64(inst, 12, 1) << 8))
#define GET_C_SIMM3(inst) extract32(inst, 10, 3)
#define GET_C_RD(inst) GET_RD(inst)
#define GET_C_RS1(inst) GET_RD(inst)
#define GET_C_RS2(inst) extract32(inst, 2, 5)
#define GET_C_RS1S(inst) (8 + extract32(inst, 7, 3))
#define GET_C_RS2S(inst) (8 + extract32(inst, 2, 3))

669
target/riscv/op_helper.c Normal file
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@ -0,0 +1,669 @@
/*
* RISC-V Emulation Helpers for QEMU.
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017-2018 SiFive, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "cpu.h"
#include "qemu/main-loop.h"
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
#ifndef CONFIG_USER_ONLY
#if defined(TARGET_RISCV32)
static const char valid_vm_1_09[16] = {
[VM_1_09_MBARE] = 1,
[VM_1_09_SV32] = 1,
};
static const char valid_vm_1_10[16] = {
[VM_1_10_MBARE] = 1,
[VM_1_10_SV32] = 1
};
#elif defined(TARGET_RISCV64)
static const char valid_vm_1_09[16] = {
[VM_1_09_MBARE] = 1,
[VM_1_09_SV39] = 1,
[VM_1_09_SV48] = 1,
};
static const char valid_vm_1_10[16] = {
[VM_1_10_MBARE] = 1,
[VM_1_10_SV39] = 1,
[VM_1_10_SV48] = 1,
[VM_1_10_SV57] = 1
};
#endif
static int validate_vm(CPURISCVState *env, target_ulong vm)
{
return (env->priv_ver >= PRIV_VERSION_1_10_0) ?
valid_vm_1_10[vm & 0xf] : valid_vm_1_09[vm & 0xf];
}
#endif
/* Exceptions processing helpers */
void QEMU_NORETURN do_raise_exception_err(CPURISCVState *env,
uint32_t exception, uintptr_t pc)
{
CPUState *cs = CPU(riscv_env_get_cpu(env));
qemu_log_mask(CPU_LOG_INT, "%s: %d\n", __func__, exception);
cs->exception_index = exception;
cpu_loop_exit_restore(cs, pc);
}
void helper_raise_exception(CPURISCVState *env, uint32_t exception)
{
do_raise_exception_err(env, exception, 0);
}
static void validate_mstatus_fs(CPURISCVState *env, uintptr_t ra)
{
#ifndef CONFIG_USER_ONLY
if (!(env->mstatus & MSTATUS_FS)) {
do_raise_exception_err(env, RISCV_EXCP_ILLEGAL_INST, ra);
}
#endif
}
/*
* Handle writes to CSRs and any resulting special behavior
*
* Adapted from Spike's processor_t::set_csr
*/
void csr_write_helper(CPURISCVState *env, target_ulong val_to_write,
target_ulong csrno)
{
#ifndef CONFIG_USER_ONLY
uint64_t delegable_ints = MIP_SSIP | MIP_STIP | MIP_SEIP | (1 << IRQ_X_COP);
uint64_t all_ints = delegable_ints | MIP_MSIP | MIP_MTIP;
#endif
switch (csrno) {
case CSR_FFLAGS:
validate_mstatus_fs(env, GETPC());
cpu_riscv_set_fflags(env, val_to_write & (FSR_AEXC >> FSR_AEXC_SHIFT));
break;
case CSR_FRM:
validate_mstatus_fs(env, GETPC());
env->frm = val_to_write & (FSR_RD >> FSR_RD_SHIFT);
break;
case CSR_FCSR:
validate_mstatus_fs(env, GETPC());
env->frm = (val_to_write & FSR_RD) >> FSR_RD_SHIFT;
cpu_riscv_set_fflags(env, (val_to_write & FSR_AEXC) >> FSR_AEXC_SHIFT);
break;
#ifndef CONFIG_USER_ONLY
case CSR_MSTATUS: {
target_ulong mstatus = env->mstatus;
target_ulong mask = 0;
target_ulong mpp = get_field(val_to_write, MSTATUS_MPP);
/* flush tlb on mstatus fields that affect VM */
if (env->priv_ver <= PRIV_VERSION_1_09_1) {
if ((val_to_write ^ mstatus) & (MSTATUS_MXR | MSTATUS_MPP |
MSTATUS_MPRV | MSTATUS_SUM | MSTATUS_VM)) {
helper_tlb_flush(env);
}
mask = MSTATUS_SIE | MSTATUS_SPIE | MSTATUS_MIE | MSTATUS_MPIE |
MSTATUS_SPP | MSTATUS_FS | MSTATUS_MPRV | MSTATUS_SUM |
MSTATUS_MPP | MSTATUS_MXR |
(validate_vm(env, get_field(val_to_write, MSTATUS_VM)) ?
MSTATUS_VM : 0);
}
if (env->priv_ver >= PRIV_VERSION_1_10_0) {
if ((val_to_write ^ mstatus) & (MSTATUS_MXR | MSTATUS_MPP |
MSTATUS_MPRV | MSTATUS_SUM)) {
helper_tlb_flush(env);
}
mask = MSTATUS_SIE | MSTATUS_SPIE | MSTATUS_MIE | MSTATUS_MPIE |
MSTATUS_SPP | MSTATUS_FS | MSTATUS_MPRV | MSTATUS_SUM |
MSTATUS_MPP | MSTATUS_MXR;
}
/* silenty discard mstatus.mpp writes for unsupported modes */
if (mpp == PRV_H ||
(!riscv_has_ext(env, RVS) && mpp == PRV_S) ||
(!riscv_has_ext(env, RVU) && mpp == PRV_U)) {
mask &= ~MSTATUS_MPP;
}
mstatus = (mstatus & ~mask) | (val_to_write & mask);
int dirty = (mstatus & MSTATUS_FS) == MSTATUS_FS;
dirty |= (mstatus & MSTATUS_XS) == MSTATUS_XS;
mstatus = set_field(mstatus, MSTATUS_SD, dirty);
env->mstatus = mstatus;
break;
}
case CSR_MIP: {
/*
* Since the writeable bits in MIP are not set asynchrously by the
* CLINT, no additional locking is needed for read-modifiy-write
* CSR operations
*/
qemu_mutex_lock_iothread();
RISCVCPU *cpu = riscv_env_get_cpu(env);
riscv_set_local_interrupt(cpu, MIP_SSIP,
(val_to_write & MIP_SSIP) != 0);
riscv_set_local_interrupt(cpu, MIP_STIP,
(val_to_write & MIP_STIP) != 0);
/*
* csrs, csrc on mip.SEIP is not decomposable into separate read and
* write steps, so a different implementation is needed
*/
qemu_mutex_unlock_iothread();
break;
}
case CSR_MIE: {
env->mie = (env->mie & ~all_ints) |
(val_to_write & all_ints);
break;
}
case CSR_MIDELEG:
env->mideleg = (env->mideleg & ~delegable_ints)
| (val_to_write & delegable_ints);
break;
case CSR_MEDELEG: {
target_ulong mask = 0;
mask |= 1ULL << (RISCV_EXCP_INST_ADDR_MIS);
mask |= 1ULL << (RISCV_EXCP_INST_ACCESS_FAULT);
mask |= 1ULL << (RISCV_EXCP_ILLEGAL_INST);
mask |= 1ULL << (RISCV_EXCP_BREAKPOINT);
mask |= 1ULL << (RISCV_EXCP_LOAD_ADDR_MIS);
mask |= 1ULL << (RISCV_EXCP_LOAD_ACCESS_FAULT);
mask |= 1ULL << (RISCV_EXCP_STORE_AMO_ADDR_MIS);
mask |= 1ULL << (RISCV_EXCP_STORE_AMO_ACCESS_FAULT);
mask |= 1ULL << (RISCV_EXCP_U_ECALL);
mask |= 1ULL << (RISCV_EXCP_S_ECALL);
mask |= 1ULL << (RISCV_EXCP_H_ECALL);
mask |= 1ULL << (RISCV_EXCP_M_ECALL);
mask |= 1ULL << (RISCV_EXCP_INST_PAGE_FAULT);
mask |= 1ULL << (RISCV_EXCP_LOAD_PAGE_FAULT);
mask |= 1ULL << (RISCV_EXCP_STORE_PAGE_FAULT);
env->medeleg = (env->medeleg & ~mask)
| (val_to_write & mask);
break;
}
case CSR_MINSTRET:
qemu_log_mask(LOG_UNIMP, "CSR_MINSTRET: write not implemented");
goto do_illegal;
case CSR_MCYCLE:
qemu_log_mask(LOG_UNIMP, "CSR_MCYCLE: write not implemented");
goto do_illegal;
case CSR_MINSTRETH:
qemu_log_mask(LOG_UNIMP, "CSR_MINSTRETH: write not implemented");
goto do_illegal;
case CSR_MCYCLEH:
qemu_log_mask(LOG_UNIMP, "CSR_MCYCLEH: write not implemented");
goto do_illegal;
case CSR_MUCOUNTEREN:
env->mucounteren = val_to_write;
break;
case CSR_MSCOUNTEREN:
env->mscounteren = val_to_write;
break;
case CSR_SSTATUS: {
target_ulong ms = env->mstatus;
target_ulong mask = SSTATUS_SIE | SSTATUS_SPIE | SSTATUS_UIE
| SSTATUS_UPIE | SSTATUS_SPP | SSTATUS_FS | SSTATUS_XS
| SSTATUS_SUM | SSTATUS_MXR | SSTATUS_SD;
ms = (ms & ~mask) | (val_to_write & mask);
csr_write_helper(env, ms, CSR_MSTATUS);
break;
}
case CSR_SIP: {
qemu_mutex_lock_iothread();
target_ulong next_mip = (env->mip & ~env->mideleg)
| (val_to_write & env->mideleg);
qemu_mutex_unlock_iothread();
csr_write_helper(env, next_mip, CSR_MIP);
break;
}
case CSR_SIE: {
target_ulong next_mie = (env->mie & ~env->mideleg)
| (val_to_write & env->mideleg);
csr_write_helper(env, next_mie, CSR_MIE);
break;
}
case CSR_SATP: /* CSR_SPTBR */ {
if (!riscv_feature(env, RISCV_FEATURE_MMU)) {
goto do_illegal;
}
if (env->priv_ver <= PRIV_VERSION_1_09_1 && (val_to_write ^ env->sptbr))
{
helper_tlb_flush(env);
env->sptbr = val_to_write & (((target_ulong)
1 << (TARGET_PHYS_ADDR_SPACE_BITS - PGSHIFT)) - 1);
}
if (env->priv_ver >= PRIV_VERSION_1_10_0 &&
validate_vm(env, get_field(val_to_write, SATP_MODE)) &&
((val_to_write ^ env->satp) & (SATP_MODE | SATP_ASID | SATP_PPN)))
{
helper_tlb_flush(env);
env->satp = val_to_write;
}
break;
}
case CSR_SEPC:
env->sepc = val_to_write;
break;
case CSR_STVEC:
if (val_to_write & 1) {
qemu_log_mask(LOG_UNIMP, "CSR_STVEC: vectored traps not supported");
goto do_illegal;
}
env->stvec = val_to_write >> 2 << 2;
break;
case CSR_SCOUNTEREN:
env->scounteren = val_to_write;
break;
case CSR_SSCRATCH:
env->sscratch = val_to_write;
break;
case CSR_SCAUSE:
env->scause = val_to_write;
break;
case CSR_SBADADDR:
env->sbadaddr = val_to_write;
break;
case CSR_MEPC:
env->mepc = val_to_write;
break;
case CSR_MTVEC:
if (val_to_write & 1) {
qemu_log_mask(LOG_UNIMP, "CSR_MTVEC: vectored traps not supported");
goto do_illegal;
}
env->mtvec = val_to_write >> 2 << 2;
break;
case CSR_MCOUNTEREN:
env->mcounteren = val_to_write;
break;
case CSR_MSCRATCH:
env->mscratch = val_to_write;
break;
case CSR_MCAUSE:
env->mcause = val_to_write;
break;
case CSR_MBADADDR:
env->mbadaddr = val_to_write;
break;
case CSR_MISA: {
qemu_log_mask(LOG_UNIMP, "CSR_MISA: misa writes not supported");
goto do_illegal;
}
case CSR_PMPCFG0:
case CSR_PMPCFG1:
case CSR_PMPCFG2:
case CSR_PMPCFG3:
pmpcfg_csr_write(env, csrno - CSR_PMPCFG0, val_to_write);
break;
case CSR_PMPADDR0:
case CSR_PMPADDR1:
case CSR_PMPADDR2:
case CSR_PMPADDR3:
case CSR_PMPADDR4:
case CSR_PMPADDR5:
case CSR_PMPADDR6:
case CSR_PMPADDR7:
case CSR_PMPADDR8:
case CSR_PMPADDR9:
case CSR_PMPADDR10:
case CSR_PMPADDR11:
case CSR_PMPADDR12:
case CSR_PMPADDR13:
case CSR_PMPADDR14:
case CSR_PMPADDR15:
pmpaddr_csr_write(env, csrno - CSR_PMPADDR0, val_to_write);
break;
do_illegal:
#endif
default:
do_raise_exception_err(env, RISCV_EXCP_ILLEGAL_INST, GETPC());
}
}
/*
* Handle reads to CSRs and any resulting special behavior
*
* Adapted from Spike's processor_t::get_csr
*/
target_ulong csr_read_helper(CPURISCVState *env, target_ulong csrno)
{
#ifndef CONFIG_USER_ONLY
target_ulong ctr_en = env->priv == PRV_U ? env->mucounteren :
env->priv == PRV_S ? env->mscounteren : -1U;
#else
target_ulong ctr_en = -1;
#endif
target_ulong ctr_ok = (ctr_en >> (csrno & 31)) & 1;
if (csrno >= CSR_HPMCOUNTER3 && csrno <= CSR_HPMCOUNTER31) {
if (ctr_ok) {
return 0;
}
}
#if defined(TARGET_RISCV32)
if (csrno >= CSR_HPMCOUNTER3H && csrno <= CSR_HPMCOUNTER31H) {
if (ctr_ok) {
return 0;
}
}
#endif
if (csrno >= CSR_MHPMCOUNTER3 && csrno <= CSR_MHPMCOUNTER31) {
return 0;
}
#if defined(TARGET_RISCV32)
if (csrno >= CSR_MHPMCOUNTER3 && csrno <= CSR_MHPMCOUNTER31) {
return 0;
}
#endif
if (csrno >= CSR_MHPMEVENT3 && csrno <= CSR_MHPMEVENT31) {
return 0;
}
switch (csrno) {
case CSR_FFLAGS:
validate_mstatus_fs(env, GETPC());
return cpu_riscv_get_fflags(env);
case CSR_FRM:
validate_mstatus_fs(env, GETPC());
return env->frm;
case CSR_FCSR:
validate_mstatus_fs(env, GETPC());
return (cpu_riscv_get_fflags(env) << FSR_AEXC_SHIFT)
| (env->frm << FSR_RD_SHIFT);
/* rdtime/rdtimeh is trapped and emulated by bbl in system mode */
#ifdef CONFIG_USER_ONLY
case CSR_TIME:
return cpu_get_host_ticks();
#if defined(TARGET_RISCV32)
case CSR_TIMEH:
return cpu_get_host_ticks() >> 32;
#endif
#endif
case CSR_INSTRET:
case CSR_CYCLE:
if (ctr_ok) {
return cpu_get_host_ticks();
}
break;
#if defined(TARGET_RISCV32)
case CSR_INSTRETH:
case CSR_CYCLEH:
if (ctr_ok) {
return cpu_get_host_ticks() >> 32;
}
break;
#endif
#ifndef CONFIG_USER_ONLY
case CSR_MINSTRET:
case CSR_MCYCLE:
return cpu_get_host_ticks();
case CSR_MINSTRETH:
case CSR_MCYCLEH:
#if defined(TARGET_RISCV32)
return cpu_get_host_ticks() >> 32;
#endif
break;
case CSR_MUCOUNTEREN:
return env->mucounteren;
case CSR_MSCOUNTEREN:
return env->mscounteren;
case CSR_SSTATUS: {
target_ulong mask = SSTATUS_SIE | SSTATUS_SPIE | SSTATUS_UIE
| SSTATUS_UPIE | SSTATUS_SPP | SSTATUS_FS | SSTATUS_XS
| SSTATUS_SUM | SSTATUS_SD;
if (env->priv_ver >= PRIV_VERSION_1_10_0) {
mask |= SSTATUS_MXR;
}
return env->mstatus & mask;
}
case CSR_SIP: {
qemu_mutex_lock_iothread();
target_ulong tmp = env->mip & env->mideleg;
qemu_mutex_unlock_iothread();
return tmp;
}
case CSR_SIE:
return env->mie & env->mideleg;
case CSR_SEPC:
return env->sepc;
case CSR_SBADADDR:
return env->sbadaddr;
case CSR_STVEC:
return env->stvec;
case CSR_SCOUNTEREN:
return env->scounteren;
case CSR_SCAUSE:
return env->scause;
case CSR_SPTBR:
if (env->priv_ver >= PRIV_VERSION_1_10_0) {
return env->satp;
} else {
return env->sptbr;
}
case CSR_SSCRATCH:
return env->sscratch;
case CSR_MSTATUS:
return env->mstatus;
case CSR_MIP: {
qemu_mutex_lock_iothread();
target_ulong tmp = env->mip;
qemu_mutex_unlock_iothread();
return tmp;
}
case CSR_MIE:
return env->mie;
case CSR_MEPC:
return env->mepc;
case CSR_MSCRATCH:
return env->mscratch;
case CSR_MCAUSE:
return env->mcause;
case CSR_MBADADDR:
return env->mbadaddr;
case CSR_MISA:
return env->misa;
case CSR_MARCHID:
return 0; /* as spike does */
case CSR_MIMPID:
return 0; /* as spike does */
case CSR_MVENDORID:
return 0; /* as spike does */
case CSR_MHARTID:
return env->mhartid;
case CSR_MTVEC:
return env->mtvec;
case CSR_MCOUNTEREN:
return env->mcounteren;
case CSR_MEDELEG:
return env->medeleg;
case CSR_MIDELEG:
return env->mideleg;
case CSR_PMPCFG0:
case CSR_PMPCFG1:
case CSR_PMPCFG2:
case CSR_PMPCFG3:
return pmpcfg_csr_read(env, csrno - CSR_PMPCFG0);
case CSR_PMPADDR0:
case CSR_PMPADDR1:
case CSR_PMPADDR2:
case CSR_PMPADDR3:
case CSR_PMPADDR4:
case CSR_PMPADDR5:
case CSR_PMPADDR6:
case CSR_PMPADDR7:
case CSR_PMPADDR8:
case CSR_PMPADDR9:
case CSR_PMPADDR10:
case CSR_PMPADDR11:
case CSR_PMPADDR12:
case CSR_PMPADDR13:
case CSR_PMPADDR14:
case CSR_PMPADDR15:
return pmpaddr_csr_read(env, csrno - CSR_PMPADDR0);
#endif
}
/* used by e.g. MTIME read */
do_raise_exception_err(env, RISCV_EXCP_ILLEGAL_INST, GETPC());
}
/*
* Check that CSR access is allowed.
*
* Adapted from Spike's decode.h:validate_csr
*/
static void validate_csr(CPURISCVState *env, uint64_t which,
uint64_t write, uintptr_t ra)
{
#ifndef CONFIG_USER_ONLY
unsigned csr_priv = get_field((which), 0x300);
unsigned csr_read_only = get_field((which), 0xC00) == 3;
if (((write) && csr_read_only) || (env->priv < csr_priv)) {
do_raise_exception_err(env, RISCV_EXCP_ILLEGAL_INST, ra);
}
#endif
}
target_ulong helper_csrrw(CPURISCVState *env, target_ulong src,
target_ulong csr)
{
validate_csr(env, csr, 1, GETPC());
uint64_t csr_backup = csr_read_helper(env, csr);
csr_write_helper(env, src, csr);
return csr_backup;
}
target_ulong helper_csrrs(CPURISCVState *env, target_ulong src,
target_ulong csr, target_ulong rs1_pass)
{
validate_csr(env, csr, rs1_pass != 0, GETPC());
uint64_t csr_backup = csr_read_helper(env, csr);
if (rs1_pass != 0) {
csr_write_helper(env, src | csr_backup, csr);
}
return csr_backup;
}
target_ulong helper_csrrc(CPURISCVState *env, target_ulong src,
target_ulong csr, target_ulong rs1_pass)
{
validate_csr(env, csr, rs1_pass != 0, GETPC());
uint64_t csr_backup = csr_read_helper(env, csr);
if (rs1_pass != 0) {
csr_write_helper(env, (~src) & csr_backup, csr);
}
return csr_backup;
}
#ifndef CONFIG_USER_ONLY
/* iothread_mutex must be held */
void riscv_set_local_interrupt(RISCVCPU *cpu, target_ulong mask, int value)
{
target_ulong old_mip = cpu->env.mip;
cpu->env.mip = (old_mip & ~mask) | (value ? mask : 0);
if (cpu->env.mip && !old_mip) {
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
} else if (!cpu->env.mip && old_mip) {
cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
}
}
void riscv_set_mode(CPURISCVState *env, target_ulong newpriv)
{
if (newpriv > PRV_M) {
g_assert_not_reached();
}
if (newpriv == PRV_H) {
newpriv = PRV_U;
}
/* tlb_flush is unnecessary as mode is contained in mmu_idx */
env->priv = newpriv;
}
target_ulong helper_sret(CPURISCVState *env, target_ulong cpu_pc_deb)
{
if (!(env->priv >= PRV_S)) {
do_raise_exception_err(env, RISCV_EXCP_ILLEGAL_INST, GETPC());
}
target_ulong retpc = env->sepc;
if (!riscv_has_ext(env, RVC) && (retpc & 0x3)) {
do_raise_exception_err(env, RISCV_EXCP_INST_ADDR_MIS, GETPC());
}
target_ulong mstatus = env->mstatus;
target_ulong prev_priv = get_field(mstatus, MSTATUS_SPP);
mstatus = set_field(mstatus,
env->priv_ver >= PRIV_VERSION_1_10_0 ?
MSTATUS_SIE : MSTATUS_UIE << prev_priv,
get_field(mstatus, MSTATUS_SPIE));
mstatus = set_field(mstatus, MSTATUS_SPIE, 0);
mstatus = set_field(mstatus, MSTATUS_SPP, PRV_U);
riscv_set_mode(env, prev_priv);
csr_write_helper(env, mstatus, CSR_MSTATUS);
return retpc;
}
target_ulong helper_mret(CPURISCVState *env, target_ulong cpu_pc_deb)
{
if (!(env->priv >= PRV_M)) {
do_raise_exception_err(env, RISCV_EXCP_ILLEGAL_INST, GETPC());
}
target_ulong retpc = env->mepc;
if (!riscv_has_ext(env, RVC) && (retpc & 0x3)) {
do_raise_exception_err(env, RISCV_EXCP_INST_ADDR_MIS, GETPC());
}
target_ulong mstatus = env->mstatus;
target_ulong prev_priv = get_field(mstatus, MSTATUS_MPP);
mstatus = set_field(mstatus,
env->priv_ver >= PRIV_VERSION_1_10_0 ?
MSTATUS_MIE : MSTATUS_UIE << prev_priv,
get_field(mstatus, MSTATUS_MPIE));
mstatus = set_field(mstatus, MSTATUS_MPIE, 0);
mstatus = set_field(mstatus, MSTATUS_MPP, PRV_U);
riscv_set_mode(env, prev_priv);
csr_write_helper(env, mstatus, CSR_MSTATUS);
return retpc;
}
void helper_wfi(CPURISCVState *env)
{
CPUState *cs = CPU(riscv_env_get_cpu(env));
cs->halted = 1;
cs->exception_index = EXCP_HLT;
cpu_loop_exit(cs);
}
void helper_tlb_flush(CPURISCVState *env)
{
RISCVCPU *cpu = riscv_env_get_cpu(env);
CPUState *cs = CPU(cpu);
tlb_flush(cs);
}
#endif /* !CONFIG_USER_ONLY */

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/*
* QEMU RISC-V PMP (Physical Memory Protection)
*
* Author: Daire McNamara, daire.mcnamara@emdalo.com
* Ivan Griffin, ivan.griffin@emdalo.com
*
* This provides a RISC-V Physical Memory Protection implementation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* PMP (Physical Memory Protection) is as-of-yet unused and needs testing.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qapi/error.h"
#include "cpu.h"
#include "qemu-common.h"
#ifndef CONFIG_USER_ONLY
#define RISCV_DEBUG_PMP 0
#define PMP_DEBUG(fmt, ...) \
do { \
if (RISCV_DEBUG_PMP) { \
qemu_log_mask(LOG_TRACE, "%s: " fmt "\n", __func__, ##__VA_ARGS__);\
} \
} while (0)
static void pmp_write_cfg(CPURISCVState *env, uint32_t addr_index,
uint8_t val);
static uint8_t pmp_read_cfg(CPURISCVState *env, uint32_t addr_index);
static void pmp_update_rule(CPURISCVState *env, uint32_t pmp_index);
/*
* Accessor method to extract address matching type 'a field' from cfg reg
*/
static inline uint8_t pmp_get_a_field(uint8_t cfg)
{
uint8_t a = cfg >> 3;
return a & 0x3;
}
/*
* Check whether a PMP is locked or not.
*/
static inline int pmp_is_locked(CPURISCVState *env, uint32_t pmp_index)
{
if (env->pmp_state.pmp[pmp_index].cfg_reg & PMP_LOCK) {
return 1;
}
/* Top PMP has no 'next' to check */
if ((pmp_index + 1u) >= MAX_RISCV_PMPS) {
return 0;
}
/* In TOR mode, need to check the lock bit of the next pmp
* (if there is a next)
*/
const uint8_t a_field =
pmp_get_a_field(env->pmp_state.pmp[pmp_index + 1].cfg_reg);
if ((env->pmp_state.pmp[pmp_index + 1u].cfg_reg & PMP_LOCK) &&
(PMP_AMATCH_TOR == a_field)) {
return 1;
}
return 0;
}
/*
* Count the number of active rules.
*/
static inline uint32_t pmp_get_num_rules(CPURISCVState *env)
{
return env->pmp_state.num_rules;
}
/*
* Accessor to get the cfg reg for a specific PMP/HART
*/
static inline uint8_t pmp_read_cfg(CPURISCVState *env, uint32_t pmp_index)
{
if (pmp_index < MAX_RISCV_PMPS) {
return env->pmp_state.pmp[pmp_index].cfg_reg;
}
return 0;
}
/*
* Accessor to set the cfg reg for a specific PMP/HART
* Bounds checks and relevant lock bit.
*/
static void pmp_write_cfg(CPURISCVState *env, uint32_t pmp_index, uint8_t val)
{
if (pmp_index < MAX_RISCV_PMPS) {
if (!pmp_is_locked(env, pmp_index)) {
env->pmp_state.pmp[pmp_index].cfg_reg = val;
pmp_update_rule(env, pmp_index);
} else {
PMP_DEBUG("ignoring write - locked");
}
} else {
PMP_DEBUG("ignoring write - out of bounds");
}
}
static void pmp_decode_napot(target_ulong a, target_ulong *sa, target_ulong *ea)
{
/*
aaaa...aaa0 8-byte NAPOT range
aaaa...aa01 16-byte NAPOT range
aaaa...a011 32-byte NAPOT range
...
aa01...1111 2^XLEN-byte NAPOT range
a011...1111 2^(XLEN+1)-byte NAPOT range
0111...1111 2^(XLEN+2)-byte NAPOT range
1111...1111 Reserved
*/
if (a == -1) {
*sa = 0u;
*ea = -1;
return;
} else {
target_ulong t1 = ctz64(~a);
target_ulong base = (a & ~(((target_ulong)1 << t1) - 1)) << 3;
target_ulong range = ((target_ulong)1 << (t1 + 3)) - 1;
*sa = base;
*ea = base + range;
}
}
/* Convert cfg/addr reg values here into simple 'sa' --> start address and 'ea'
* end address values.
* This function is called relatively infrequently whereas the check that
* an address is within a pmp rule is called often, so optimise that one
*/
static void pmp_update_rule(CPURISCVState *env, uint32_t pmp_index)
{
int i;
env->pmp_state.num_rules = 0;
uint8_t this_cfg = env->pmp_state.pmp[pmp_index].cfg_reg;
target_ulong this_addr = env->pmp_state.pmp[pmp_index].addr_reg;
target_ulong prev_addr = 0u;
target_ulong sa = 0u;
target_ulong ea = 0u;
if (pmp_index >= 1u) {
prev_addr = env->pmp_state.pmp[pmp_index - 1].addr_reg;
}
switch (pmp_get_a_field(this_cfg)) {
case PMP_AMATCH_OFF:
sa = 0u;
ea = -1;
break;
case PMP_AMATCH_TOR:
sa = prev_addr << 2; /* shift up from [xx:0] to [xx+2:2] */
ea = (this_addr << 2) - 1u;
break;
case PMP_AMATCH_NA4:
sa = this_addr << 2; /* shift up from [xx:0] to [xx+2:2] */
ea = (this_addr + 4u) - 1u;
break;
case PMP_AMATCH_NAPOT:
pmp_decode_napot(this_addr, &sa, &ea);
break;
default:
sa = 0u;
ea = 0u;
break;
}
env->pmp_state.addr[pmp_index].sa = sa;
env->pmp_state.addr[pmp_index].ea = ea;
for (i = 0; i < MAX_RISCV_PMPS; i++) {
const uint8_t a_field =
pmp_get_a_field(env->pmp_state.pmp[i].cfg_reg);
if (PMP_AMATCH_OFF != a_field) {
env->pmp_state.num_rules++;
}
}
}
static int pmp_is_in_range(CPURISCVState *env, int pmp_index, target_ulong addr)
{
int result = 0;
if ((addr >= env->pmp_state.addr[pmp_index].sa)
&& (addr <= env->pmp_state.addr[pmp_index].ea)) {
result = 1;
} else {
result = 0;
}
return result;
}
/*
* Public Interface
*/
/*
* Check if the address has required RWX privs to complete desired operation
*/
bool pmp_hart_has_privs(CPURISCVState *env, target_ulong addr,
target_ulong size, pmp_priv_t privs)
{
int i = 0;
int ret = -1;
target_ulong s = 0;
target_ulong e = 0;
pmp_priv_t allowed_privs = 0;
/* Short cut if no rules */
if (0 == pmp_get_num_rules(env)) {
return true;
}
/* 1.10 draft priv spec states there is an implicit order
from low to high */
for (i = 0; i < MAX_RISCV_PMPS; i++) {
s = pmp_is_in_range(env, i, addr);
e = pmp_is_in_range(env, i, addr + size);
/* partially inside */
if ((s + e) == 1) {
PMP_DEBUG("pmp violation - access is partially inside");
ret = 0;
break;
}
/* fully inside */
const uint8_t a_field =
pmp_get_a_field(env->pmp_state.pmp[i].cfg_reg);
if ((s + e) == 2) {
if (PMP_AMATCH_OFF == a_field) {
return 1;
}
allowed_privs = PMP_READ | PMP_WRITE | PMP_EXEC;
if ((env->priv != PRV_M) || pmp_is_locked(env, i)) {
allowed_privs &= env->pmp_state.pmp[i].cfg_reg;
}
if ((privs & allowed_privs) == privs) {
ret = 1;
break;
} else {
ret = 0;
break;
}
}
}
/* No rule matched */
if (ret == -1) {
if (env->priv == PRV_M) {
ret = 1; /* Privileged spec v1.10 states if no PMP entry matches an
* M-Mode access, the access succeeds */
} else {
ret = 0; /* Other modes are not allowed to succeed if they don't
* match a rule, but there are rules. We've checked for
* no rule earlier in this function. */
}
}
return ret == 1 ? true : false;
}
/*
* Handle a write to a pmpcfg CSP
*/
void pmpcfg_csr_write(CPURISCVState *env, uint32_t reg_index,
target_ulong val)
{
int i;
uint8_t cfg_val;
PMP_DEBUG("hart " TARGET_FMT_ld ": reg%d, val: 0x" TARGET_FMT_lx,
env->mhartid, reg_index, val);
if ((reg_index & 1) && (sizeof(target_ulong) == 8)) {
PMP_DEBUG("ignoring write - incorrect address");
return;
}
for (i = 0; i < sizeof(target_ulong); i++) {
cfg_val = (val >> 8 * i) & 0xff;
pmp_write_cfg(env, (reg_index * sizeof(target_ulong)) + i,
cfg_val);
}
}
/*
* Handle a read from a pmpcfg CSP
*/
target_ulong pmpcfg_csr_read(CPURISCVState *env, uint32_t reg_index)
{
int i;
target_ulong cfg_val = 0;
uint8_t val = 0;
for (i = 0; i < sizeof(target_ulong); i++) {
val = pmp_read_cfg(env, (reg_index * sizeof(target_ulong)) + i);
cfg_val |= (val << (i * 8));
}
PMP_DEBUG("hart " TARGET_FMT_ld ": reg%d, val: 0x" TARGET_FMT_lx,
env->mhartid, reg_index, cfg_val);
return cfg_val;
}
/*
* Handle a write to a pmpaddr CSP
*/
void pmpaddr_csr_write(CPURISCVState *env, uint32_t addr_index,
target_ulong val)
{
PMP_DEBUG("hart " TARGET_FMT_ld ": addr%d, val: 0x" TARGET_FMT_lx,
env->mhartid, addr_index, val);
if (addr_index < MAX_RISCV_PMPS) {
if (!pmp_is_locked(env, addr_index)) {
env->pmp_state.pmp[addr_index].addr_reg = val;
pmp_update_rule(env, addr_index);
} else {
PMP_DEBUG("ignoring write - locked");
}
} else {
PMP_DEBUG("ignoring write - out of bounds");
}
}
/*
* Handle a read from a pmpaddr CSP
*/
target_ulong pmpaddr_csr_read(CPURISCVState *env, uint32_t addr_index)
{
PMP_DEBUG("hart " TARGET_FMT_ld ": addr%d, val: 0x" TARGET_FMT_lx,
env->mhartid, addr_index,
env->pmp_state.pmp[addr_index].addr_reg);
if (addr_index < MAX_RISCV_PMPS) {
return env->pmp_state.pmp[addr_index].addr_reg;
} else {
PMP_DEBUG("ignoring read - out of bounds");
return 0;
}
}
#endif

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/*
* QEMU RISC-V PMP (Physical Memory Protection)
*
* Author: Daire McNamara, daire.mcnamara@emdalo.com
* Ivan Griffin, ivan.griffin@emdalo.com
*
* This provides a RISC-V Physical Memory Protection interface
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _RISCV_PMP_H_
#define _RISCV_PMP_H_
typedef enum {
PMP_READ = 1 << 0,
PMP_WRITE = 1 << 1,
PMP_EXEC = 1 << 2,
PMP_LOCK = 1 << 7
} pmp_priv_t;
typedef enum {
PMP_AMATCH_OFF, /* Null (off) */
PMP_AMATCH_TOR, /* Top of Range */
PMP_AMATCH_NA4, /* Naturally aligned four-byte region */
PMP_AMATCH_NAPOT /* Naturally aligned power-of-two region */
} pmp_am_t;
typedef struct {
target_ulong addr_reg;
uint8_t cfg_reg;
} pmp_entry_t;
typedef struct {
target_ulong sa;
target_ulong ea;
} pmp_addr_t;
typedef struct {
pmp_entry_t pmp[MAX_RISCV_PMPS];
pmp_addr_t addr[MAX_RISCV_PMPS];
uint32_t num_rules;
} pmp_table_t;
void pmpcfg_csr_write(CPURISCVState *env, uint32_t reg_index,
target_ulong val);
target_ulong pmpcfg_csr_read(CPURISCVState *env, uint32_t reg_index);
void pmpaddr_csr_write(CPURISCVState *env, uint32_t addr_index,
target_ulong val);
target_ulong pmpaddr_csr_read(CPURISCVState *env, uint32_t addr_index);
bool pmp_hart_has_privs(CPURISCVState *env, target_ulong addr,
target_ulong size, pmp_priv_t priv);
#endif

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