mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
16bbbbc91a
qemu/target/microblaze/cpu.h
Richard Henderson b9c58aabe6 target/microblaze: Reorganize branching 
Remove the btaken variable, and simplify things by always computing
the full branch destination into btarget.  This avoids all need for
sync_jmpstate().

Retain the direct branch behaviour by remembering the jump destination
in jmp_dest, discarding btarget.  In the normal case, where the branch
delay slot cannot trap (e.g. arithmetic), tcg will remove the computation
into btarget, leaving us with just the tcg direct branching at the end.

Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01 07:43:35 -07:00

422 lines
14 KiB
C
Raw Blame History

/*
* MicroBlaze virtual CPU header
*
* Copyright (c) 2009 Edgar E. Iglesias
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that 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 Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MICROBLAZE_CPU_H
#define MICROBLAZE_CPU_H
#include "cpu-qom.h"
#include "exec/cpu-defs.h"
#include "fpu/softfloat-types.h"
typedef struct CPUMBState CPUMBState;
#if !defined(CONFIG_USER_ONLY)
#include "mmu.h"
#endif
#define EXCP_MMU 1
#define EXCP_IRQ 2
#define EXCP_SYSCALL 3 /* user-only */
#define EXCP_HW_BREAK 4
#define EXCP_HW_EXCP 5
/* MicroBlaze-specific interrupt pending bits. */
#define CPU_INTERRUPT_NMI CPU_INTERRUPT_TGT_EXT_3
/* Meanings of the MBCPU object's two inbound GPIO lines */
#define MB_CPU_IRQ 0
#define MB_CPU_FIR 1
/* Register aliases. R0 - R15 */
#define R_SP 1
#define SR_PC 0
#define SR_MSR 1
#define SR_EAR 3
#define SR_ESR 5
#define SR_FSR 7
#define SR_BTR 0xb
#define SR_EDR 0xd
/* MSR flags. */
#define MSR_BE (1<<0) /* 0x001 */
#define MSR_IE (1<<1) /* 0x002 */
#define MSR_C (1<<2) /* 0x004 */
#define MSR_BIP (1<<3) /* 0x008 */
#define MSR_FSL (1<<4) /* 0x010 */
#define MSR_ICE (1<<5) /* 0x020 */
#define MSR_DZ (1<<6) /* 0x040 */
#define MSR_DCE (1<<7) /* 0x080 */
#define MSR_EE (1<<8) /* 0x100 */
#define MSR_EIP (1<<9) /* 0x200 */
#define MSR_PVR (1<<10) /* 0x400 */
#define MSR_CC (1<<31)
/* Machine State Register (MSR) Fields */
#define MSR_UM (1<<11) /* User Mode */
#define MSR_UMS (1<<12) /* User Mode Save */
#define MSR_VM (1<<13) /* Virtual Mode */
#define MSR_VMS (1<<14) /* Virtual Mode Save */
#define MSR_KERNEL MSR_EE|MSR_VM
//#define MSR_USER MSR_KERNEL|MSR_UM|MSR_IE
#define MSR_KERNEL_VMS MSR_EE|MSR_VMS
//#define MSR_USER_VMS MSR_KERNEL_VMS|MSR_UMS|MSR_IE
/* Exception State Register (ESR) Fields */
#define ESR_DIZ (1<<11) /* Zone Protection */
#define ESR_W (1<<11) /* Unaligned word access */
#define ESR_S (1<<10) /* Store instruction */
#define ESR_ESS_FSL_OFFSET 5
#define ESR_ESS_MASK (0x7f << 5)
#define ESR_EC_FSL 0
#define ESR_EC_UNALIGNED_DATA 1
#define ESR_EC_ILLEGAL_OP 2
#define ESR_EC_INSN_BUS 3
#define ESR_EC_DATA_BUS 4
#define ESR_EC_DIVZERO 5
#define ESR_EC_FPU 6
#define ESR_EC_PRIVINSN 7
#define ESR_EC_STACKPROT 7 /* Same as PRIVINSN. */
#define ESR_EC_DATA_STORAGE 8
#define ESR_EC_INSN_STORAGE 9
#define ESR_EC_DATA_TLB 10
#define ESR_EC_INSN_TLB 11
#define ESR_EC_MASK 31
/* Floating Point Status Register (FSR) Bits */
#define FSR_IO (1<<4) /* Invalid operation */
#define FSR_DZ (1<<3) /* Divide-by-zero */
#define FSR_OF (1<<2) /* Overflow */
#define FSR_UF (1<<1) /* Underflow */
#define FSR_DO (1<<0) /* Denormalized operand error */
/* Version reg. */
/* Basic PVR mask */
#define PVR0_PVR_FULL_MASK 0x80000000
#define PVR0_USE_BARREL_MASK 0x40000000
#define PVR0_USE_DIV_MASK 0x20000000
#define PVR0_USE_HW_MUL_MASK 0x10000000
#define PVR0_USE_FPU_MASK 0x08000000
#define PVR0_USE_EXC_MASK 0x04000000
#define PVR0_USE_ICACHE_MASK 0x02000000
#define PVR0_USE_DCACHE_MASK 0x01000000
#define PVR0_USE_MMU_MASK 0x00800000
#define PVR0_USE_BTC 0x00400000
#define PVR0_ENDI_MASK 0x00200000
#define PVR0_FAULT 0x00100000
#define PVR0_VERSION_MASK 0x0000FF00
#define PVR0_USER1_MASK 0x000000FF
#define PVR0_SPROT_MASK 0x00000001
#define PVR0_VERSION_SHIFT 8
/* User 2 PVR mask */
#define PVR1_USER2_MASK 0xFFFFFFFF
/* Configuration PVR masks */
#define PVR2_D_OPB_MASK 0x80000000
#define PVR2_D_LMB_MASK 0x40000000
#define PVR2_I_OPB_MASK 0x20000000
#define PVR2_I_LMB_MASK 0x10000000
#define PVR2_INTERRUPT_IS_EDGE_MASK 0x08000000
#define PVR2_EDGE_IS_POSITIVE_MASK 0x04000000
#define PVR2_D_PLB_MASK 0x02000000 /* new */
#define PVR2_I_PLB_MASK 0x01000000 /* new */
#define PVR2_INTERCONNECT 0x00800000 /* new */
#define PVR2_USE_EXTEND_FSL 0x00080000 /* new */
#define PVR2_USE_FSL_EXC 0x00040000 /* new */
#define PVR2_USE_MSR_INSTR 0x00020000
#define PVR2_USE_PCMP_INSTR 0x00010000
#define PVR2_AREA_OPTIMISED 0x00008000
#define PVR2_USE_BARREL_MASK 0x00004000
#define PVR2_USE_DIV_MASK 0x00002000
#define PVR2_USE_HW_MUL_MASK 0x00001000
#define PVR2_USE_FPU_MASK 0x00000800
#define PVR2_USE_MUL64_MASK 0x00000400
#define PVR2_USE_FPU2_MASK 0x00000200 /* new */
#define PVR2_USE_IPLBEXC 0x00000100
#define PVR2_USE_DPLBEXC 0x00000080
#define PVR2_OPCODE_0x0_ILL_MASK 0x00000040
#define PVR2_UNALIGNED_EXC_MASK 0x00000020
#define PVR2_ILL_OPCODE_EXC_MASK 0x00000010
#define PVR2_IOPB_BUS_EXC_MASK 0x00000008
#define PVR2_DOPB_BUS_EXC_MASK 0x00000004
#define PVR2_DIV_ZERO_EXC_MASK 0x00000002
#define PVR2_FPU_EXC_MASK 0x00000001
/* Debug and exception PVR masks */
#define PVR3_DEBUG_ENABLED_MASK 0x80000000
#define PVR3_NUMBER_OF_PC_BRK_MASK 0x1E000000
#define PVR3_NUMBER_OF_RD_ADDR_BRK_MASK 0x00380000
#define PVR3_NUMBER_OF_WR_ADDR_BRK_MASK 0x0000E000
#define PVR3_FSL_LINKS_MASK 0x00000380
/* ICache config PVR masks */
#define PVR4_USE_ICACHE_MASK 0x80000000
#define PVR4_ICACHE_ADDR_TAG_BITS_MASK 0x7C000000
#define PVR4_ICACHE_USE_FSL_MASK 0x02000000
#define PVR4_ICACHE_ALLOW_WR_MASK 0x01000000
#define PVR4_ICACHE_LINE_LEN_MASK 0x00E00000
#define PVR4_ICACHE_BYTE_SIZE_MASK 0x001F0000
/* DCache config PVR masks */
#define PVR5_USE_DCACHE_MASK 0x80000000
#define PVR5_DCACHE_ADDR_TAG_BITS_MASK 0x7C000000
#define PVR5_DCACHE_USE_FSL_MASK 0x02000000
#define PVR5_DCACHE_ALLOW_WR_MASK 0x01000000
#define PVR5_DCACHE_LINE_LEN_MASK 0x00E00000
#define PVR5_DCACHE_BYTE_SIZE_MASK 0x001F0000
#define PVR5_DCACHE_WRITEBACK_MASK 0x00004000
/* ICache base address PVR mask */
#define PVR6_ICACHE_BASEADDR_MASK 0xFFFFFFFF
/* ICache high address PVR mask */
#define PVR7_ICACHE_HIGHADDR_MASK 0xFFFFFFFF
/* DCache base address PVR mask */
#define PVR8_DCACHE_BASEADDR_MASK 0xFFFFFFFF
/* DCache high address PVR mask */
#define PVR9_DCACHE_HIGHADDR_MASK 0xFFFFFFFF
/* Target family PVR mask */
#define PVR10_TARGET_FAMILY_MASK 0xFF000000
#define PVR10_ASIZE_SHIFT 18
/* MMU descrtiption */
#define PVR11_USE_MMU 0xC0000000
#define PVR11_MMU_ITLB_SIZE 0x38000000
#define PVR11_MMU_DTLB_SIZE 0x07000000
#define PVR11_MMU_TLB_ACCESS 0x00C00000
#define PVR11_MMU_ZONES 0x003E0000
/* MSR Reset value PVR mask */
#define PVR11_MSR_RESET_VALUE_MASK 0x000007FF
#define C_PVR_NONE 0
#define C_PVR_BASIC 1
#define C_PVR_FULL 2
/* CPU flags. */
/* Condition codes. */
#define CC_GE 5
#define CC_GT 4
#define CC_LE 3
#define CC_LT 2
#define CC_NE 1
#define CC_EQ 0
#define STREAM_EXCEPTION (1 << 0)
#define STREAM_ATOMIC (1 << 1)
#define STREAM_TEST (1 << 2)
#define STREAM_CONTROL (1 << 3)
#define STREAM_NONBLOCK (1 << 4)
#define TARGET_INSN_START_EXTRA_WORDS 1
struct CPUMBState {
uint32_t bvalue; /* TCG temporary, only valid during a TB */
uint32_t btarget; /* Full resolved branch destination */
uint32_t imm;
uint32_t regs[32];
uint32_t pc;
uint32_t msr; /* All bits of MSR except MSR[C] and MSR[CC] */
uint32_t msr_c; /* MSR[C], in low bit; other bits must be 0 */
uint64_t ear;
uint32_t esr;
uint32_t fsr;
uint32_t btr;
uint32_t edr;
float_status fp_status;
/* Stack protectors. Yes, it's a hw feature. */
uint32_t slr, shr;
/* lwx/swx reserved address */
#define RES_ADDR_NONE 0xffffffff /* Use 0xffffffff to indicate no reservation */
target_ulong res_addr;
uint32_t res_val;
/* Internal flags. */
#define IMM_FLAG (1 << 0)
#define BIMM_FLAG (1 << 1)
#define ESR_ESS_FLAG (1 << 2) /* indicates ESR_ESS_MASK is present */
/* MSR_EE (1 << 8) -- these 3 are not in iflags but tb_flags */
/* MSR_UM (1 << 11) */
/* MSR_VM (1 << 13) */
/* ESR_ESS_MASK [11:5] -- unwind into iflags for unaligned excp */
#define DRTI_FLAG (1 << 16)
#define DRTE_FLAG (1 << 17)
#define DRTB_FLAG (1 << 18)
#define D_FLAG (1 << 19) /* Bit in ESR. */
/* TB dependent CPUMBState. */
#define IFLAGS_TB_MASK (D_FLAG | IMM_FLAG | DRTI_FLAG | DRTE_FLAG | DRTB_FLAG)
#define MSR_TB_MASK (MSR_UM | MSR_VM | MSR_EE)
uint32_t iflags;
#if !defined(CONFIG_USER_ONLY)
/* Unified MMU. */
struct microblaze_mmu mmu;
#endif
/* Fields up to this point are cleared by a CPU reset */
struct {} end_reset_fields;
/* These fields are preserved on reset. */
struct {
uint32_t regs[13];
} pvr;
};
/**
* MicroBlazeCPU:
* @env: #CPUMBState
*
* A MicroBlaze CPU.
*/
struct MicroBlazeCPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
CPUNegativeOffsetState neg;
CPUMBState env;
/* Microblaze Configuration Settings */
struct {
bool stackprot;
uint32_t base_vectors;
uint8_t addr_size;
uint8_t use_fpu;
uint8_t use_hw_mul;
bool use_barrel;
bool use_div;
bool use_msr_instr;
bool use_pcmp_instr;
bool use_mmu;
bool dcache_writeback;
bool endi;
bool dopb_bus_exception;
bool iopb_bus_exception;
bool illegal_opcode_exception;
bool opcode_0_illegal;
bool div_zero_exception;
bool unaligned_exceptions;
uint8_t pvr_user1;
uint32_t pvr_user2;
char *version;
uint8_t pvr;
} cfg;
};
void mb_cpu_do_interrupt(CPUState *cs);
bool mb_cpu_exec_interrupt(CPUState *cs, int int_req);
void mb_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr);
void mb_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
hwaddr mb_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
int mb_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
int mb_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
static inline uint32_t mb_cpu_read_msr(const CPUMBState *env)
{
/* Replicate MSR[C] to MSR[CC]. */
return env->msr | (env->msr_c * (MSR_C | MSR_CC));
}
static inline void mb_cpu_write_msr(CPUMBState *env, uint32_t val)
{
env->msr_c = (val >> 2) & 1;
/*
* Clear both MSR[C] and MSR[CC] from the saved copy.
* MSR_PVR is not writable and is always clear.
*/
env->msr = val & ~(MSR_C | MSR_CC | MSR_PVR);
}
void mb_tcg_init(void);
/* you can call this signal handler from your SIGBUS and SIGSEGV
signal handlers to inform the virtual CPU of exceptions. non zero
is returned if the signal was handled by the virtual CPU. */
int cpu_mb_signal_handler(int host_signum, void *pinfo,
void *puc);
#define CPU_RESOLVING_TYPE TYPE_MICROBLAZE_CPU
#define cpu_signal_handler cpu_mb_signal_handler
/* MMU modes definitions */
#define MMU_NOMMU_IDX 0
#define MMU_KERNEL_IDX 1
#define MMU_USER_IDX 2
/* See NB_MMU_MODES further up the file. */
bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
typedef CPUMBState CPUArchState;
typedef MicroBlazeCPU ArchCPU;
#include "exec/cpu-all.h"
/* Ensure there is no overlap between the two masks. */
QEMU_BUILD_BUG_ON(MSR_TB_MASK & IFLAGS_TB_MASK);
static inline void cpu_get_tb_cpu_state(CPUMBState *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->pc;
*flags = (env->iflags & IFLAGS_TB_MASK) | (env->msr & MSR_TB_MASK);
*cs_base = (*flags & IMM_FLAG ? env->imm : 0);
}
#if !defined(CONFIG_USER_ONLY)
void mb_cpu_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr,
unsigned size, MMUAccessType access_type,
int mmu_idx, MemTxAttrs attrs,
MemTxResult response, uintptr_t retaddr);
#endif
static inline int cpu_mmu_index(CPUMBState *env, bool ifetch)
{
MicroBlazeCPU *cpu = env_archcpu(env);
/* Are we in nommu mode?. */
if (!(env->msr & MSR_VM) || !cpu->cfg.use_mmu) {
return MMU_NOMMU_IDX;
}
if (env->msr & MSR_UM) {
return MMU_USER_IDX;
}
return MMU_KERNEL_IDX;
}
#endif
Reference in New Issue View Git Blame Copy Permalink