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qemu/target/riscv/cpu.h
Deepak Gupta 98f21c30f5 target/riscv: AMO operations always raise store/AMO fault 
This patch adds one more word for tcg compile which can be obtained during
unwind time to determine fault type for original operation (example AMO).
Depending on that, fault can be promoted to store/AMO fault.

Signed-off-by: Deepak Gupta <debug@rivosinc.com>
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20241008225010.1861630-15-debug@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-30 11:22:08 +10:00

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/*
* 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
#include "hw/core/cpu.h"
#include "hw/registerfields.h"
#include "hw/qdev-properties.h"
#include "exec/cpu-defs.h"
#include "exec/gdbstub.h"
#include "qemu/cpu-float.h"
#include "qom/object.h"
#include "qemu/int128.h"
#include "cpu_bits.h"
#include "cpu_cfg.h"
#include "qapi/qapi-types-common.h"
#include "cpu-qom.h"
typedef struct CPUArchState CPURISCVState;
#define CPU_RESOLVING_TYPE TYPE_RISCV_CPU
#if defined(TARGET_RISCV32)
# define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE32
#elif defined(TARGET_RISCV64)
# define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE64
#endif
/*
* RISC-V-specific extra insn start words:
* 1: Original instruction opcode
* 2: more information about instruction
*/
#define TARGET_INSN_START_EXTRA_WORDS 2
/*
* b0: Whether a instruction always raise a store AMO or not.
*/
#define RISCV_UW2_ALWAYS_STORE_AMO 1
#define RV(x) ((target_ulong)1 << (x - 'A'))
/*
* Update misa_bits[], misa_ext_info_arr[] and misa_ext_cfgs[]
* when adding new MISA bits here.
*/
#define RVI RV('I')
#define RVE RV('E') /* E and I are mutually exclusive */
#define RVM RV('M')
#define RVA RV('A')
#define RVF RV('F')
#define RVD RV('D')
#define RVV RV('V')
#define RVC RV('C')
#define RVS RV('S')
#define RVU RV('U')
#define RVH RV('H')
#define RVJ RV('J')
#define RVG RV('G')
#define RVB RV('B')
extern const uint32_t misa_bits[];
const char *riscv_get_misa_ext_name(uint32_t bit);
const char *riscv_get_misa_ext_description(uint32_t bit);
#define CPU_CFG_OFFSET(_prop) offsetof(struct RISCVCPUConfig, _prop)
typedef struct riscv_cpu_profile {
struct riscv_cpu_profile *parent;
const char *name;
uint32_t misa_ext;
bool enabled;
bool user_set;
int priv_spec;
int satp_mode;
const int32_t ext_offsets[];
} RISCVCPUProfile;
#define RISCV_PROFILE_EXT_LIST_END -1
#define RISCV_PROFILE_ATTR_UNUSED -1
extern RISCVCPUProfile *riscv_profiles[];
/* Privileged specification version */
#define PRIV_VER_1_10_0_STR "v1.10.0"
#define PRIV_VER_1_11_0_STR "v1.11.0"
#define PRIV_VER_1_12_0_STR "v1.12.0"
#define PRIV_VER_1_13_0_STR "v1.13.0"
enum {
PRIV_VERSION_1_10_0 = 0,
PRIV_VERSION_1_11_0,
PRIV_VERSION_1_12_0,
PRIV_VERSION_1_13_0,
PRIV_VERSION_LATEST = PRIV_VERSION_1_13_0,
};
#define VEXT_VERSION_1_00_0 0x00010000
#define VEXT_VER_1_00_0_STR "v1.0"
enum {
TRANSLATE_SUCCESS,
TRANSLATE_FAIL,
TRANSLATE_PMP_FAIL,
TRANSLATE_G_STAGE_FAIL
};
/* Extension context status */
typedef enum {
EXT_STATUS_DISABLED = 0,
EXT_STATUS_INITIAL,
EXT_STATUS_CLEAN,
EXT_STATUS_DIRTY,
} RISCVExtStatus;
typedef struct riscv_cpu_implied_exts_rule {
#ifndef CONFIG_USER_ONLY
/*
* Bitmask indicates the rule enabled status for the harts.
* This enhancement is only available in system-mode QEMU,
* as we don't have a good way (e.g. mhartid) to distinguish
* the SMP cores in user-mode QEMU.
*/
unsigned long *enabled;
#endif
/* True if this is a MISA implied rule. */
bool is_misa;
/* ext is MISA bit if is_misa flag is true, else multi extension offset. */
const uint32_t ext;
const uint32_t implied_misa_exts;
const uint32_t implied_multi_exts[];
} RISCVCPUImpliedExtsRule;
extern RISCVCPUImpliedExtsRule *riscv_misa_ext_implied_rules[];
extern RISCVCPUImpliedExtsRule *riscv_multi_ext_implied_rules[];
#define RISCV_IMPLIED_EXTS_RULE_END -1
#define MMU_USER_IDX 3
#define MAX_RISCV_PMPS (16)
#if !defined(CONFIG_USER_ONLY)
#include "pmp.h"
#include "debug.h"
#endif
#define RV_VLEN_MAX 1024
#define RV_MAX_MHPMEVENTS 32
#define RV_MAX_MHPMCOUNTERS 32
FIELD(VTYPE, VLMUL, 0, 3)
FIELD(VTYPE, VSEW, 3, 3)
FIELD(VTYPE, VTA, 6, 1)
FIELD(VTYPE, VMA, 7, 1)
FIELD(VTYPE, VEDIV, 8, 2)
FIELD(VTYPE, RESERVED, 10, sizeof(target_ulong) * 8 - 11)
typedef struct PMUCTRState {
/* Current value of a counter */
target_ulong mhpmcounter_val;
/* Current value of a counter in RV32 */
target_ulong mhpmcounterh_val;
/* Snapshot values of counter */
target_ulong mhpmcounter_prev;
/* Snapshort value of a counter in RV32 */
target_ulong mhpmcounterh_prev;
/* Value beyond UINT32_MAX/UINT64_MAX before overflow interrupt trigger */
target_ulong irq_overflow_left;
} PMUCTRState;
typedef struct PMUFixedCtrState {
/* Track cycle and icount for each privilege mode */
uint64_t counter[4];
uint64_t counter_prev[4];
/* Track cycle and icount for each privilege mode when V = 1*/
uint64_t counter_virt[2];
uint64_t counter_virt_prev[2];
} PMUFixedCtrState;
struct CPUArchState {
target_ulong gpr[32];
target_ulong gprh[32]; /* 64 top bits of the 128-bit registers */
/* vector coprocessor state. */
uint64_t vreg[32 * RV_VLEN_MAX / 64] QEMU_ALIGNED(16);
target_ulong vxrm;
target_ulong vxsat;
target_ulong vl;
target_ulong vstart;
target_ulong vtype;
bool vill;
target_ulong pc;
target_ulong load_res;
target_ulong load_val;
/* Floating-Point state */
uint64_t fpr[32]; /* assume both F and D extensions */
target_ulong frm;
float_status fp_status;
target_ulong badaddr;
target_ulong bins;
target_ulong guest_phys_fault_addr;
target_ulong priv_ver;
target_ulong vext_ver;
/* RISCVMXL, but uint32_t for vmstate migration */
uint32_t misa_mxl; /* current mxl */
uint32_t misa_ext; /* current extensions */
uint32_t misa_ext_mask; /* max ext for this cpu */
uint32_t xl; /* current xlen */
/* 128-bit helpers upper part return value */
target_ulong retxh;
target_ulong jvt;
/* elp state for zicfilp extension */
bool elp;
/* shadow stack register for zicfiss extension */
target_ulong ssp;
/* env place holder for extra word 2 during unwind */
target_ulong excp_uw2;
/* sw check code for sw check exception */
target_ulong sw_check_code;
#ifdef CONFIG_USER_ONLY
uint32_t elf_flags;
#endif
target_ulong priv;
/* CSRs for execution environment configuration */
uint64_t menvcfg;
target_ulong senvcfg;
#ifndef CONFIG_USER_ONLY
/* This contains QEMU specific information about the virt state. */
bool virt_enabled;
target_ulong geilen;
uint64_t resetvec;
target_ulong mhartid;
/*
* For RV32 this is 32-bit mstatus and 32-bit mstatush.
* For RV64 this is a 64-bit mstatus.
*/
uint64_t mstatus;
uint64_t mip;
/*
* MIP contains the software writable version of SEIP ORed with the
* external interrupt value. The MIP register is always up-to-date.
* To keep track of the current source, we also save booleans of the values
* here.
*/
bool external_seip;
bool software_seip;
uint64_t miclaim;
uint64_t mie;
uint64_t mideleg;
/*
* When mideleg[i]=0 and mvien[i]=1, sie[i] is no more
* alias of mie[i] and needs to be maintained separately.
*/
uint64_t sie;
/*
* When hideleg[i]=0 and hvien[i]=1, vsie[i] is no more
* alias of sie[i] (mie[i]) and needs to be maintained separately.
*/
uint64_t vsie;
target_ulong satp; /* since: priv-1.10.0 */
target_ulong stval;
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 */
/* Machine and Supervisor interrupt priorities */
uint8_t miprio[64];
uint8_t siprio[64];
/* AIA CSRs */
target_ulong miselect;
target_ulong siselect;
uint64_t mvien;
uint64_t mvip;
/* Hypervisor CSRs */
target_ulong hstatus;
target_ulong hedeleg;
uint64_t hideleg;
uint32_t hcounteren;
target_ulong htval;
target_ulong htinst;
target_ulong hgatp;
target_ulong hgeie;
target_ulong hgeip;
uint64_t htimedelta;
uint64_t hvien;
/*
* Bits VSSIP, VSTIP and VSEIP in hvip are maintained in mip. Other bits
* from 0:12 are reserved. Bits 13:63 are not aliased and must be separately
* maintain in hvip.
*/
uint64_t hvip;
/* Hypervisor controlled virtual interrupt priorities */
target_ulong hvictl;
uint8_t hviprio[64];
/* Upper 64-bits of 128-bit CSRs */
uint64_t mscratchh;
uint64_t sscratchh;
/* Virtual CSRs */
/*
* For RV32 this is 32-bit vsstatus and 32-bit vsstatush.
* For RV64 this is a 64-bit vsstatus.
*/
uint64_t vsstatus;
target_ulong vstvec;
target_ulong vsscratch;
target_ulong vsepc;
target_ulong vscause;
target_ulong vstval;
target_ulong vsatp;
/* AIA VS-mode CSRs */
target_ulong vsiselect;
target_ulong mtval2;
target_ulong mtinst;
/* HS Backup CSRs */
target_ulong stvec_hs;
target_ulong sscratch_hs;
target_ulong sepc_hs;
target_ulong scause_hs;
target_ulong stval_hs;
target_ulong satp_hs;
uint64_t mstatus_hs;
/*
* Signals whether the current exception occurred with two-stage address
* translation active.
*/
bool two_stage_lookup;
/*
* Signals whether the current exception occurred while doing two-stage
* address translation for the VS-stage page table walk.
*/
bool two_stage_indirect_lookup;
uint32_t scounteren;
uint32_t mcounteren;
uint32_t mcountinhibit;
/* PMU cycle & instret privilege mode filtering */
target_ulong mcyclecfg;
target_ulong mcyclecfgh;
target_ulong minstretcfg;
target_ulong minstretcfgh;
/* PMU counter state */
PMUCTRState pmu_ctrs[RV_MAX_MHPMCOUNTERS];
/* PMU event selector configured values. First three are unused */
target_ulong mhpmevent_val[RV_MAX_MHPMEVENTS];
/* PMU event selector configured values for RV32 */
target_ulong mhpmeventh_val[RV_MAX_MHPMEVENTS];
PMUFixedCtrState pmu_fixed_ctrs[2];
target_ulong sscratch;
target_ulong mscratch;
/* Sstc CSRs */
uint64_t stimecmp;
uint64_t vstimecmp;
/* physical memory protection */
pmp_table_t pmp_state;
target_ulong mseccfg;
/* trigger module */
target_ulong trigger_cur;
target_ulong tdata1[RV_MAX_TRIGGERS];
target_ulong tdata2[RV_MAX_TRIGGERS];
target_ulong tdata3[RV_MAX_TRIGGERS];
target_ulong mcontext;
struct CPUBreakpoint *cpu_breakpoint[RV_MAX_TRIGGERS];
struct CPUWatchpoint *cpu_watchpoint[RV_MAX_TRIGGERS];
QEMUTimer *itrigger_timer[RV_MAX_TRIGGERS];
int64_t last_icount;
bool itrigger_enabled;
/* machine specific rdtime callback */
uint64_t (*rdtime_fn)(void *);
void *rdtime_fn_arg;
/* machine specific AIA ireg read-modify-write callback */
#define AIA_MAKE_IREG(__isel, __priv, __virt, __vgein, __xlen) \
((((__xlen) & 0xff) << 24) | \
(((__vgein) & 0x3f) << 20) | \
(((__virt) & 0x1) << 18) | \
(((__priv) & 0x3) << 16) | \
(__isel & 0xffff))
#define AIA_IREG_ISEL(__ireg) ((__ireg) & 0xffff)
#define AIA_IREG_PRIV(__ireg) (((__ireg) >> 16) & 0x3)
#define AIA_IREG_VIRT(__ireg) (((__ireg) >> 18) & 0x1)
#define AIA_IREG_VGEIN(__ireg) (((__ireg) >> 20) & 0x3f)
#define AIA_IREG_XLEN(__ireg) (((__ireg) >> 24) & 0xff)
int (*aia_ireg_rmw_fn[4])(void *arg, target_ulong reg,
target_ulong *val, target_ulong new_val, target_ulong write_mask);
void *aia_ireg_rmw_fn_arg[4];
/* True if in debugger mode. */
bool debugger;
/*
* CSRs for PointerMasking extension
*/
target_ulong mmte;
target_ulong mpmmask;
target_ulong mpmbase;
target_ulong spmmask;
target_ulong spmbase;
target_ulong upmmask;
target_ulong upmbase;
uint64_t mstateen[SMSTATEEN_MAX_COUNT];
uint64_t hstateen[SMSTATEEN_MAX_COUNT];
uint64_t sstateen[SMSTATEEN_MAX_COUNT];
uint64_t henvcfg;
#endif
target_ulong cur_pmmask;
target_ulong cur_pmbase;
/* Fields from here on are preserved across CPU reset. */
QEMUTimer *stimer; /* Internal timer for S-mode interrupt */
QEMUTimer *vstimer; /* Internal timer for VS-mode interrupt */
bool vstime_irq;
hwaddr kernel_addr;
hwaddr fdt_addr;
#ifdef CONFIG_KVM
/* kvm timer */
bool kvm_timer_dirty;
uint64_t kvm_timer_time;
uint64_t kvm_timer_compare;
uint64_t kvm_timer_state;
uint64_t kvm_timer_frequency;
#endif /* CONFIG_KVM */
};
/*
* RISCVCPU:
* @env: #CPURISCVState
*
* A RISCV CPU.
*/
struct ArchCPU {
CPUState parent_obj;
CPURISCVState env;
GDBFeature dyn_csr_feature;
GDBFeature dyn_vreg_feature;
/* Configuration Settings */
RISCVCPUConfig cfg;
QEMUTimer *pmu_timer;
/* A bitmask of Available programmable counters */
uint32_t pmu_avail_ctrs;
/* Mapping of events to counters */
GHashTable *pmu_event_ctr_map;
const GPtrArray *decoders;
};
/**
* RISCVCPUClass:
* @parent_realize: The parent class' realize handler.
* @parent_phases: The parent class' reset phase handlers.
*
* A RISCV CPU model.
*/
struct RISCVCPUClass {
CPUClass parent_class;
DeviceRealize parent_realize;
ResettablePhases parent_phases;
uint32_t misa_mxl_max; /* max mxl for this cpu */
};
static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext)
{
return (env->misa_ext & ext) != 0;
}
#include "cpu_user.h"
extern const char * const riscv_int_regnames[];
extern const char * const riscv_int_regnamesh[];
extern const char * const riscv_fpr_regnames[];
const char *riscv_cpu_get_trap_name(target_ulong cause, bool async);
int riscv_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, DumpState *s);
int riscv_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, DumpState *s);
int riscv_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
int riscv_cpu_hviprio_index2irq(int index, int *out_irq, int *out_rdzero);
uint8_t riscv_cpu_default_priority(int irq);
uint64_t riscv_cpu_all_pending(CPURISCVState *env);
int riscv_cpu_mirq_pending(CPURISCVState *env);
int riscv_cpu_sirq_pending(CPURISCVState *env);
int riscv_cpu_vsirq_pending(CPURISCVState *env);
bool riscv_cpu_fp_enabled(CPURISCVState *env);
target_ulong riscv_cpu_get_geilen(CPURISCVState *env);
void riscv_cpu_set_geilen(CPURISCVState *env, target_ulong geilen);
bool riscv_cpu_vector_enabled(CPURISCVState *env);
void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
int riscv_env_mmu_index(CPURISCVState *env, bool ifetch);
bool cpu_get_fcfien(CPURISCVState *env);
bool cpu_get_bcfien(CPURISCVState *env);
G_NORETURN void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr);
bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
char *riscv_isa_string(RISCVCPU *cpu);
int riscv_cpu_max_xlen(RISCVCPUClass *mcc);
bool riscv_cpu_option_set(const char *optname);
#ifndef CONFIG_USER_ONLY
void riscv_cpu_do_interrupt(CPUState *cpu);
void riscv_isa_write_fdt(RISCVCPU *cpu, void *fdt, char *nodename);
void riscv_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
vaddr addr, unsigned size,
MMUAccessType access_type,
int mmu_idx, MemTxAttrs attrs,
MemTxResult response, uintptr_t retaddr);
hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request);
void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env);
int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint64_t interrupts);
uint64_t riscv_cpu_update_mip(CPURISCVState *env, uint64_t mask,
uint64_t value);
void riscv_cpu_interrupt(CPURISCVState *env);
#define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */
void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(void *),
void *arg);
void riscv_cpu_set_aia_ireg_rmw_fn(CPURISCVState *env, uint32_t priv,
int (*rmw_fn)(void *arg,
target_ulong reg,
target_ulong *val,
target_ulong new_val,
target_ulong write_mask),
void *rmw_fn_arg);
RISCVException smstateen_acc_ok(CPURISCVState *env, int index, uint64_t bit);
#endif /* !CONFIG_USER_ONLY */
void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv, bool virt_en);
void riscv_translate_init(void);
G_NORETURN void riscv_raise_exception(CPURISCVState *env,
uint32_t exception, uintptr_t pc);
target_ulong riscv_cpu_get_fflags(CPURISCVState *env);
void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong);
#include "exec/cpu-all.h"
FIELD(TB_FLAGS, MEM_IDX, 0, 3)
FIELD(TB_FLAGS, FS, 3, 2)
/* Vector flags */
FIELD(TB_FLAGS, VS, 5, 2)
FIELD(TB_FLAGS, LMUL, 7, 3)
FIELD(TB_FLAGS, SEW, 10, 3)
FIELD(TB_FLAGS, VL_EQ_VLMAX, 13, 1)
FIELD(TB_FLAGS, VILL, 14, 1)
FIELD(TB_FLAGS, VSTART_EQ_ZERO, 15, 1)
/* The combination of MXL/SXL/UXL that applies to the current cpu mode. */
FIELD(TB_FLAGS, XL, 16, 2)
/* If PointerMasking should be applied */
FIELD(TB_FLAGS, PM_MASK_ENABLED, 18, 1)
FIELD(TB_FLAGS, PM_BASE_ENABLED, 19, 1)
FIELD(TB_FLAGS, VTA, 20, 1)
FIELD(TB_FLAGS, VMA, 21, 1)
/* Native debug itrigger */
FIELD(TB_FLAGS, ITRIGGER, 22, 1)
/* Virtual mode enabled */
FIELD(TB_FLAGS, VIRT_ENABLED, 23, 1)
FIELD(TB_FLAGS, PRIV, 24, 2)
FIELD(TB_FLAGS, AXL, 26, 2)
/* zicfilp needs a TB flag to track indirect branches */
FIELD(TB_FLAGS, FCFI_ENABLED, 28, 1)
FIELD(TB_FLAGS, FCFI_LP_EXPECTED, 29, 1)
/* zicfiss needs a TB flag so that correct TB is located based on tb flags */
FIELD(TB_FLAGS, BCFI_ENABLED, 30, 1)
#ifdef TARGET_RISCV32
#define riscv_cpu_mxl(env) ((void)(env), MXL_RV32)
#else
static inline RISCVMXL riscv_cpu_mxl(CPURISCVState *env)
{
return env->misa_mxl;
}
#endif
#define riscv_cpu_mxl_bits(env) (1UL << (4 + riscv_cpu_mxl(env)))
static inline const RISCVCPUConfig *riscv_cpu_cfg(CPURISCVState *env)
{
return &env_archcpu(env)->cfg;
}
#if !defined(CONFIG_USER_ONLY)
static inline int cpu_address_mode(CPURISCVState *env)
{
int mode = env->priv;
if (mode == PRV_M && get_field(env->mstatus, MSTATUS_MPRV)) {
mode = get_field(env->mstatus, MSTATUS_MPP);
}
return mode;
}
static inline RISCVMXL cpu_get_xl(CPURISCVState *env, target_ulong mode)
{
RISCVMXL xl = env->misa_mxl;
/*
* When emulating a 32-bit-only cpu, use RV32.
* When emulating a 64-bit cpu, and MXL has been reduced to RV32,
* MSTATUSH doesn't have UXL/SXL, therefore XLEN cannot be widened
* back to RV64 for lower privs.
*/
if (xl != MXL_RV32) {
switch (mode) {
case PRV_M:
break;
case PRV_U:
xl = get_field(env->mstatus, MSTATUS64_UXL);
break;
default: /* PRV_S */
xl = get_field(env->mstatus, MSTATUS64_SXL);
break;
}
}
return xl;
}
#endif
#if defined(TARGET_RISCV32)
#define cpu_recompute_xl(env) ((void)(env), MXL_RV32)
#else
static inline RISCVMXL cpu_recompute_xl(CPURISCVState *env)
{
#if !defined(CONFIG_USER_ONLY)
return cpu_get_xl(env, env->priv);
#else
return env->misa_mxl;
#endif
}
#endif
#if defined(TARGET_RISCV32)
#define cpu_address_xl(env) ((void)(env), MXL_RV32)
#else
static inline RISCVMXL cpu_address_xl(CPURISCVState *env)
{
#ifdef CONFIG_USER_ONLY
return env->xl;
#else
int mode = cpu_address_mode(env);
return cpu_get_xl(env, mode);
#endif
}
#endif
static inline int riscv_cpu_xlen(CPURISCVState *env)
{
return 16 << env->xl;
}
#ifdef TARGET_RISCV32
#define riscv_cpu_sxl(env) ((void)(env), MXL_RV32)
#else
static inline RISCVMXL riscv_cpu_sxl(CPURISCVState *env)
{
#ifdef CONFIG_USER_ONLY
return env->misa_mxl;
#else
if (env->misa_mxl != MXL_RV32) {
return get_field(env->mstatus, MSTATUS64_SXL);
}
#endif
return MXL_RV32;
}
#endif
/*
* Encode LMUL to lmul as follows:
* LMUL vlmul lmul
* 1 000 0
* 2 001 1
* 4 010 2
* 8 011 3
* - 100 -
* 1/8 101 -3
* 1/4 110 -2
* 1/2 111 -1
*
* then, we can calculate VLMAX = vlen >> (vsew + 3 - lmul)
* e.g. vlen = 256 bits, SEW = 16, LMUL = 1/8
* => VLMAX = vlen >> (1 + 3 - (-3))
* = 256 >> 7
* = 2
*/
static inline uint32_t vext_get_vlmax(uint32_t vlenb, uint32_t vsew,
int8_t lmul)
{
uint32_t vlen = vlenb << 3;
/*
* We need to use 'vlen' instead of 'vlenb' to
* preserve the '+ 3' in the formula. Otherwise
* we risk a negative shift if vsew < lmul.
*/
return vlen >> (vsew + 3 - lmul);
}
void cpu_get_tb_cpu_state(CPURISCVState *env, vaddr *pc,
uint64_t *cs_base, uint32_t *pflags);
void riscv_cpu_update_mask(CPURISCVState *env);
bool riscv_cpu_is_32bit(RISCVCPU *cpu);
RISCVException riscv_csrr(CPURISCVState *env, int csrno,
target_ulong *ret_value);
RISCVException riscv_csrrw(CPURISCVState *env, int csrno,
target_ulong *ret_value,
target_ulong new_value, target_ulong write_mask);
RISCVException riscv_csrrw_debug(CPURISCVState *env, int csrno,
target_ulong *ret_value,
target_ulong new_value,
target_ulong write_mask);
static inline void riscv_csr_write(CPURISCVState *env, int csrno,
target_ulong val)
{
riscv_csrrw(env, csrno, NULL, val, MAKE_64BIT_MASK(0, TARGET_LONG_BITS));
}
static inline target_ulong riscv_csr_read(CPURISCVState *env, int csrno)
{
target_ulong val = 0;
riscv_csrrw(env, csrno, &val, 0, 0);
return val;
}
typedef RISCVException (*riscv_csr_predicate_fn)(CPURISCVState *env,
int csrno);
typedef RISCVException (*riscv_csr_read_fn)(CPURISCVState *env, int csrno,
target_ulong *ret_value);
typedef RISCVException (*riscv_csr_write_fn)(CPURISCVState *env, int csrno,
target_ulong new_value);
typedef RISCVException (*riscv_csr_op_fn)(CPURISCVState *env, int csrno,
target_ulong *ret_value,
target_ulong new_value,
target_ulong write_mask);
RISCVException riscv_csrr_i128(CPURISCVState *env, int csrno,
Int128 *ret_value);
RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno,
Int128 *ret_value,
Int128 new_value, Int128 write_mask);
typedef RISCVException (*riscv_csr_read128_fn)(CPURISCVState *env, int csrno,
Int128 *ret_value);
typedef RISCVException (*riscv_csr_write128_fn)(CPURISCVState *env, int csrno,
Int128 new_value);
typedef struct {
const char *name;
riscv_csr_predicate_fn predicate;
riscv_csr_read_fn read;
riscv_csr_write_fn write;
riscv_csr_op_fn op;
riscv_csr_read128_fn read128;
riscv_csr_write128_fn write128;
/* The default priv spec version should be PRIV_VERSION_1_10_0 (i.e 0) */
uint32_t min_priv_ver;
} riscv_csr_operations;
/* CSR function table constants */
enum {
CSR_TABLE_SIZE = 0x1000
};
/*
* The event id are encoded based on the encoding specified in the
* SBI specification v0.3
*/
enum riscv_pmu_event_idx {
RISCV_PMU_EVENT_HW_CPU_CYCLES = 0x01,
RISCV_PMU_EVENT_HW_INSTRUCTIONS = 0x02,
RISCV_PMU_EVENT_CACHE_DTLB_READ_MISS = 0x10019,
RISCV_PMU_EVENT_CACHE_DTLB_WRITE_MISS = 0x1001B,
RISCV_PMU_EVENT_CACHE_ITLB_PREFETCH_MISS = 0x10021,
};
/* used by tcg/tcg-cpu.c*/
void isa_ext_update_enabled(RISCVCPU *cpu, uint32_t ext_offset, bool en);
bool isa_ext_is_enabled(RISCVCPU *cpu, uint32_t ext_offset);
void riscv_cpu_set_misa_ext(CPURISCVState *env, uint32_t ext);
bool riscv_cpu_is_vendor(Object *cpu_obj);
typedef struct RISCVCPUMultiExtConfig {
const char *name;
uint32_t offset;
bool enabled;
} RISCVCPUMultiExtConfig;
extern const RISCVCPUMultiExtConfig riscv_cpu_extensions[];
extern const RISCVCPUMultiExtConfig riscv_cpu_vendor_exts[];
extern const RISCVCPUMultiExtConfig riscv_cpu_experimental_exts[];
extern const RISCVCPUMultiExtConfig riscv_cpu_named_features[];
extern const RISCVCPUMultiExtConfig riscv_cpu_deprecated_exts[];
typedef struct isa_ext_data {
const char *name;
int min_version;
int ext_enable_offset;
} RISCVIsaExtData;
extern const RISCVIsaExtData isa_edata_arr[];
char *riscv_cpu_get_name(RISCVCPU *cpu);
void riscv_cpu_finalize_features(RISCVCPU *cpu, Error **errp);
void riscv_add_satp_mode_properties(Object *obj);
bool riscv_cpu_accelerator_compatible(RISCVCPU *cpu);
/* CSR function table */
extern riscv_csr_operations csr_ops[CSR_TABLE_SIZE];
extern const bool valid_vm_1_10_32[], valid_vm_1_10_64[];
void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops);
void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops);
void riscv_cpu_register_gdb_regs_for_features(CPUState *cs);
target_ulong riscv_new_csr_seed(target_ulong new_value,
target_ulong write_mask);
uint8_t satp_mode_max_from_map(uint32_t map);
const char *satp_mode_str(uint8_t satp_mode, bool is_32_bit);
/* Implemented in th_csr.c */
void th_register_custom_csrs(RISCVCPU *cpu);
const char *priv_spec_to_str(int priv_version);
#endif /* RISCV_CPU_H */
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