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Diffstat (limited to 'target/mips/internal.h')
| -rw-r--r-- | target/mips/internal.h | 362 |
1 files changed, 362 insertions, 0 deletions
diff --git a/target/mips/internal.h b/target/mips/internal.h new file mode 100644 index 0000000000..91c2df4537 --- /dev/null +++ b/target/mips/internal.h @@ -0,0 +1,362 @@ +/* mips internal definitions and helpers + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#ifndef MIPS_INTERNAL_H +#define MIPS_INTERNAL_H + +enum CPUMIPSMSADataFormat { + DF_BYTE = 0, + DF_HALF, + DF_WORD, + DF_DOUBLE +}; + +void mips_cpu_do_interrupt(CPUState *cpu); +bool mips_cpu_exec_interrupt(CPUState *cpu, int int_req); +void mips_cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf, + int flags); +hwaddr mips_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); +int mips_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); +int mips_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); +void mips_cpu_do_unaligned_access(CPUState *cpu, vaddr addr, + MMUAccessType access_type, + int mmu_idx, uintptr_t retaddr); + +#if !defined(CONFIG_USER_ONLY) + +typedef struct r4k_tlb_t r4k_tlb_t; +struct r4k_tlb_t { + target_ulong VPN; + uint32_t PageMask; + uint16_t ASID; + unsigned int G:1; + unsigned int C0:3; + unsigned int C1:3; + unsigned int V0:1; + unsigned int V1:1; + unsigned int D0:1; + unsigned int D1:1; + unsigned int XI0:1; + unsigned int XI1:1; + unsigned int RI0:1; + unsigned int RI1:1; + unsigned int EHINV:1; + uint64_t PFN[2]; +}; + +struct CPUMIPSTLBContext { + uint32_t nb_tlb; + uint32_t tlb_in_use; + int (*map_address)(struct CPUMIPSState *env, hwaddr *physical, int *prot, + target_ulong address, int rw, int access_type); + void (*helper_tlbwi)(struct CPUMIPSState *env); + void (*helper_tlbwr)(struct CPUMIPSState *env); + void (*helper_tlbp)(struct CPUMIPSState *env); + void (*helper_tlbr)(struct CPUMIPSState *env); + void (*helper_tlbinv)(struct CPUMIPSState *env); + void (*helper_tlbinvf)(struct CPUMIPSState *env); + union { + struct { + r4k_tlb_t tlb[MIPS_TLB_MAX]; + } r4k; + } mmu; +}; + +int no_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot, + target_ulong address, int rw, int access_type); +int fixed_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot, + target_ulong address, int rw, int access_type); +int r4k_map_address(CPUMIPSState *env, hwaddr *physical, int *prot, + target_ulong address, int rw, int access_type); +void r4k_helper_tlbwi(CPUMIPSState *env); +void r4k_helper_tlbwr(CPUMIPSState *env); +void r4k_helper_tlbp(CPUMIPSState *env); +void r4k_helper_tlbr(CPUMIPSState *env); +void r4k_helper_tlbinv(CPUMIPSState *env); +void r4k_helper_tlbinvf(CPUMIPSState *env); +void r4k_invalidate_tlb(CPUMIPSState *env, int idx, int use_extra); + +void mips_cpu_unassigned_access(CPUState *cpu, hwaddr addr, + bool is_write, bool is_exec, int unused, + unsigned size); +hwaddr cpu_mips_translate_address(CPUMIPSState *env, target_ulong address, + int rw); +#endif + +#define cpu_signal_handler cpu_mips_signal_handler + +#ifndef CONFIG_USER_ONLY +extern const struct VMStateDescription vmstate_mips_cpu; +#endif + +static inline bool cpu_mips_hw_interrupts_enabled(CPUMIPSState *env) +{ + return (env->CP0_Status & (1 << CP0St_IE)) && + !(env->CP0_Status & (1 << CP0St_EXL)) && + !(env->CP0_Status & (1 << CP0St_ERL)) && + !(env->hflags & MIPS_HFLAG_DM) && + /* Note that the TCStatus IXMT field is initialized to zero, + and only MT capable cores can set it to one. So we don't + need to check for MT capabilities here. */ + !(env->active_tc.CP0_TCStatus & (1 << CP0TCSt_IXMT)); +} + +/* Check if there is pending and not masked out interrupt */ +static inline bool cpu_mips_hw_interrupts_pending(CPUMIPSState *env) +{ + int32_t pending; + int32_t status; + bool r; + + pending = env->CP0_Cause & CP0Ca_IP_mask; + status = env->CP0_Status & CP0Ca_IP_mask; + + if (env->CP0_Config3 & (1 << CP0C3_VEIC)) { + /* A MIPS configured with a vectorizing external interrupt controller + will feed a vector into the Cause pending lines. The core treats + the status lines as a vector level, not as indiviual masks. */ + r = pending > status; + } else { + /* A MIPS configured with compatibility or VInt (Vectored Interrupts) + treats the pending lines as individual interrupt lines, the status + lines are individual masks. */ + r = (pending & status) != 0; + } + return r; +} + +void mips_tcg_init(void); + +/* TODO QOM'ify CPU reset and remove */ +void cpu_state_reset(CPUMIPSState *s); + +/* cp0_timer.c */ +uint32_t cpu_mips_get_random(CPUMIPSState *env); +uint32_t cpu_mips_get_count(CPUMIPSState *env); +void cpu_mips_store_count(CPUMIPSState *env, uint32_t value); +void cpu_mips_store_compare(CPUMIPSState *env, uint32_t value); +void cpu_mips_start_count(CPUMIPSState *env); +void cpu_mips_stop_count(CPUMIPSState *env); + +/* helper.c */ +int mips_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw, + int mmu_idx); + +/* op_helper.c */ +uint32_t float_class_s(uint32_t arg, float_status *fst); +uint64_t float_class_d(uint64_t arg, float_status *fst); + +extern unsigned int ieee_rm[]; +int ieee_ex_to_mips(int xcpt); + +static inline void restore_rounding_mode(CPUMIPSState *env) +{ + set_float_rounding_mode(ieee_rm[env->active_fpu.fcr31 & 3], + &env->active_fpu.fp_status); +} + +static inline void restore_flush_mode(CPUMIPSState *env) +{ + set_flush_to_zero((env->active_fpu.fcr31 & (1 << FCR31_FS)) != 0, + &env->active_fpu.fp_status); +} + +static inline void restore_fp_status(CPUMIPSState *env) +{ + restore_rounding_mode(env); + restore_flush_mode(env); + restore_snan_bit_mode(env); +} + +static inline void restore_msa_fp_status(CPUMIPSState *env) +{ + float_status *status = &env->active_tc.msa_fp_status; + int rounding_mode = (env->active_tc.msacsr & MSACSR_RM_MASK) >> MSACSR_RM; + bool flush_to_zero = (env->active_tc.msacsr & MSACSR_FS_MASK) != 0; + + set_float_rounding_mode(ieee_rm[rounding_mode], status); + set_flush_to_zero(flush_to_zero, status); + set_flush_inputs_to_zero(flush_to_zero, status); +} + +static inline void restore_pamask(CPUMIPSState *env) +{ + if (env->hflags & MIPS_HFLAG_ELPA) { + env->PAMask = (1ULL << env->PABITS) - 1; + } else { + env->PAMask = PAMASK_BASE; + } +} + +static inline int mips_vpe_active(CPUMIPSState *env) +{ + int active = 1; + + /* Check that the VPE is enabled. */ + if (!(env->mvp->CP0_MVPControl & (1 << CP0MVPCo_EVP))) { + active = 0; + } + /* Check that the VPE is activated. */ + if (!(env->CP0_VPEConf0 & (1 << CP0VPEC0_VPA))) { + active = 0; + } + + /* Now verify that there are active thread contexts in the VPE. + + This assumes the CPU model will internally reschedule threads + if the active one goes to sleep. If there are no threads available + the active one will be in a sleeping state, and we can turn off + the entire VPE. */ + if (!(env->active_tc.CP0_TCStatus & (1 << CP0TCSt_A))) { + /* TC is not activated. */ + active = 0; + } + if (env->active_tc.CP0_TCHalt & 1) { + /* TC is in halt state. */ + active = 0; + } + + return active; +} + +static inline int mips_vp_active(CPUMIPSState *env) +{ + CPUState *other_cs = first_cpu; + + /* Check if the VP disabled other VPs (which means the VP is enabled) */ + if ((env->CP0_VPControl >> CP0VPCtl_DIS) & 1) { + return 1; + } + + /* Check if the virtual processor is disabled due to a DVP */ + CPU_FOREACH(other_cs) { + MIPSCPU *other_cpu = MIPS_CPU(other_cs); + if ((&other_cpu->env != env) && + ((other_cpu->env.CP0_VPControl >> CP0VPCtl_DIS) & 1)) { + return 0; + } + } + return 1; +} + +static inline void compute_hflags(CPUMIPSState *env) +{ + env->hflags &= ~(MIPS_HFLAG_COP1X | MIPS_HFLAG_64 | MIPS_HFLAG_CP0 | + MIPS_HFLAG_F64 | MIPS_HFLAG_FPU | MIPS_HFLAG_KSU | + MIPS_HFLAG_AWRAP | MIPS_HFLAG_DSP | MIPS_HFLAG_DSPR2 | + MIPS_HFLAG_SBRI | MIPS_HFLAG_MSA | MIPS_HFLAG_FRE | + MIPS_HFLAG_ELPA | MIPS_HFLAG_ERL); + if (env->CP0_Status & (1 << CP0St_ERL)) { + env->hflags |= MIPS_HFLAG_ERL; + } + if (!(env->CP0_Status & (1 << CP0St_EXL)) && + !(env->CP0_Status & (1 << CP0St_ERL)) && + !(env->hflags & MIPS_HFLAG_DM)) { + env->hflags |= (env->CP0_Status >> CP0St_KSU) & MIPS_HFLAG_KSU; + } +#if defined(TARGET_MIPS64) + if ((env->insn_flags & ISA_MIPS3) && + (((env->hflags & MIPS_HFLAG_KSU) != MIPS_HFLAG_UM) || + (env->CP0_Status & (1 << CP0St_PX)) || + (env->CP0_Status & (1 << CP0St_UX)))) { + env->hflags |= MIPS_HFLAG_64; + } + + if (!(env->insn_flags & ISA_MIPS3)) { + env->hflags |= MIPS_HFLAG_AWRAP; + } else if (((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_UM) && + !(env->CP0_Status & (1 << CP0St_UX))) { + env->hflags |= MIPS_HFLAG_AWRAP; + } else if (env->insn_flags & ISA_MIPS64R6) { + /* Address wrapping for Supervisor and Kernel is specified in R6 */ + if ((((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_SM) && + !(env->CP0_Status & (1 << CP0St_SX))) || + (((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_KM) && + !(env->CP0_Status & (1 << CP0St_KX)))) { + env->hflags |= MIPS_HFLAG_AWRAP; + } + } +#endif + if (((env->CP0_Status & (1 << CP0St_CU0)) && + !(env->insn_flags & ISA_MIPS32R6)) || + !(env->hflags & MIPS_HFLAG_KSU)) { + env->hflags |= MIPS_HFLAG_CP0; + } + if (env->CP0_Status & (1 << CP0St_CU1)) { + env->hflags |= MIPS_HFLAG_FPU; + } + if (env->CP0_Status & (1 << CP0St_FR)) { + env->hflags |= MIPS_HFLAG_F64; + } + if (((env->hflags & MIPS_HFLAG_KSU) != MIPS_HFLAG_KM) && + (env->CP0_Config5 & (1 << CP0C5_SBRI))) { + env->hflags |= MIPS_HFLAG_SBRI; + } + if (env->insn_flags & ASE_DSPR2) { + /* Enables access MIPS DSP resources, now our cpu is DSP ASER2, + so enable to access DSPR2 resources. */ + if (env->CP0_Status & (1 << CP0St_MX)) { + env->hflags |= MIPS_HFLAG_DSP | MIPS_HFLAG_DSPR2; + } + + } else if (env->insn_flags & ASE_DSP) { + /* Enables access MIPS DSP resources, now our cpu is DSP ASE, + so enable to access DSP resources. */ + if (env->CP0_Status & (1 << CP0St_MX)) { + env->hflags |= MIPS_HFLAG_DSP; + } + + } + if (env->insn_flags & ISA_MIPS32R2) { + if (env->active_fpu.fcr0 & (1 << FCR0_F64)) { + env->hflags |= MIPS_HFLAG_COP1X; + } + } else if (env->insn_flags & ISA_MIPS32) { + if (env->hflags & MIPS_HFLAG_64) { + env->hflags |= MIPS_HFLAG_COP1X; + } + } else if (env->insn_flags & ISA_MIPS4) { + /* All supported MIPS IV CPUs use the XX (CU3) to enable + and disable the MIPS IV extensions to the MIPS III ISA. + Some other MIPS IV CPUs ignore the bit, so the check here + would be too restrictive for them. */ + if (env->CP0_Status & (1U << CP0St_CU3)) { + env->hflags |= MIPS_HFLAG_COP1X; + } + } + if (env->insn_flags & ASE_MSA) { + if (env->CP0_Config5 & (1 << CP0C5_MSAEn)) { + env->hflags |= MIPS_HFLAG_MSA; + } + } + if (env->active_fpu.fcr0 & (1 << FCR0_FREP)) { + if (env->CP0_Config5 & (1 << CP0C5_FRE)) { + env->hflags |= MIPS_HFLAG_FRE; + } + } + if (env->CP0_Config3 & (1 << CP0C3_LPA)) { + if (env->CP0_PageGrain & (1 << CP0PG_ELPA)) { + env->hflags |= MIPS_HFLAG_ELPA; + } + } +} + +void cpu_mips_tlb_flush(CPUMIPSState *env); +void sync_c0_status(CPUMIPSState *env, CPUMIPSState *cpu, int tc); +void cpu_mips_store_status(CPUMIPSState *env, target_ulong val); +void cpu_mips_store_cause(CPUMIPSState *env, target_ulong val); + +void QEMU_NORETURN do_raise_exception_err(CPUMIPSState *env, uint32_t exception, + int error_code, uintptr_t pc); + +static inline void QEMU_NORETURN do_raise_exception(CPUMIPSState *env, + uint32_t exception, + uintptr_t pc) +{ + do_raise_exception_err(env, exception, 0, pc); +} + +#endif |