| /* |
| * 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 */ |
| target_ulong 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 D_FLAG (1 << 12) /* Bit in ESR. */ |
| #define DRTI_FLAG (1 << 16) |
| #define DRTE_FLAG (1 << 17) |
| #define DRTB_FLAG (1 << 18) |
| |
| /* TB dependent CPUMBState. */ |
| #define IFLAGS_TB_MASK (D_FLAG | BIMM_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. */ |
| MicroBlazeMMU mmu; |
| #endif |
| |
| /* Fields up to this point are cleared by a CPU reset */ |
| struct {} end_reset_fields; |
| |
| /* These fields are preserved on reset. */ |
| }; |
| |
| /* |
| * Microblaze Configuration Settings |
| * |
| * Note that the structure is sorted by type and size to minimize holes. |
| */ |
| typedef struct { |
| char *version; |
| |
| uint64_t addr_mask; |
| |
| uint32_t base_vectors; |
| uint32_t pvr_user2; |
| uint32_t pvr_regs[13]; |
| |
| uint8_t addr_size; |
| uint8_t use_fpu; |
| uint8_t use_hw_mul; |
| uint8_t pvr_user1; |
| uint8_t pvr; |
| uint8_t mmu; |
| uint8_t mmu_tlb_access; |
| uint8_t mmu_zones; |
| |
| bool stackprot; |
| 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; |
| } MicroBlazeCPUConfig; |
| |
| /** |
| * MicroBlazeCPU: |
| * @env: #CPUMBState |
| * |
| * A MicroBlaze CPU. |
| */ |
| struct MicroBlazeCPU { |
| /*< private >*/ |
| CPUState parent_obj; |
| |
| /*< public >*/ |
| |
| CPUNegativeOffsetState neg; |
| CPUMBState env; |
| MicroBlazeCPUConfig 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; |
| } |
| |
| #ifndef CONFIG_USER_ONLY |
| extern const VMStateDescription vmstate_mb_cpu; |
| #endif |
| |
| #endif |
