diff options
Diffstat (limited to 'target/mips/cpu.c')
| -rw-r--r-- | target/mips/cpu.c | 299 |
1 files changed, 297 insertions, 2 deletions
diff --git a/target/mips/cpu.c b/target/mips/cpu.c index 76d50b00b4..aadc6f8e74 100644 --- a/target/mips/cpu.c +++ b/target/mips/cpu.c @@ -20,6 +20,7 @@ #include "qemu/osdep.h" #include "qemu/cutils.h" +#include "qemu/qemu-print.h" #include "qapi/error.h" #include "cpu.h" #include "internal.h" @@ -30,6 +31,8 @@ #include "exec/exec-all.h" #include "hw/qdev-properties.h" #include "hw/qdev-clock.h" +#include "hw/semihosting/semihost.h" +#include "qapi/qapi-commands-machine-target.h" static void mips_cpu_set_pc(CPUState *cs, vaddr value) { @@ -74,7 +77,7 @@ static bool mips_cpu_has_work(CPUState *cs) } /* MIPS-MT has the ability to halt the CPU. */ - if (env->CP0_Config3 & (1 << CP0C3_MT)) { + if (ase_mt_available(env)) { /* * The QEMU model will issue an _WAKE request whenever the CPUs * should be woken up. @@ -99,6 +102,236 @@ static bool mips_cpu_has_work(CPUState *cs) return has_work; } +#include "translate_init.c.inc" + +/* TODO QOM'ify CPU reset and remove */ +static void cpu_state_reset(CPUMIPSState *env) +{ + CPUState *cs = env_cpu(env); + + /* Reset registers to their default values */ + env->CP0_PRid = env->cpu_model->CP0_PRid; + env->CP0_Config0 = env->cpu_model->CP0_Config0; +#ifdef TARGET_WORDS_BIGENDIAN + env->CP0_Config0 |= (1 << CP0C0_BE); +#endif + env->CP0_Config1 = env->cpu_model->CP0_Config1; + env->CP0_Config2 = env->cpu_model->CP0_Config2; + env->CP0_Config3 = env->cpu_model->CP0_Config3; + env->CP0_Config4 = env->cpu_model->CP0_Config4; + env->CP0_Config4_rw_bitmask = env->cpu_model->CP0_Config4_rw_bitmask; + env->CP0_Config5 = env->cpu_model->CP0_Config5; + env->CP0_Config5_rw_bitmask = env->cpu_model->CP0_Config5_rw_bitmask; + env->CP0_Config6 = env->cpu_model->CP0_Config6; + env->CP0_Config6_rw_bitmask = env->cpu_model->CP0_Config6_rw_bitmask; + env->CP0_Config7 = env->cpu_model->CP0_Config7; + env->CP0_Config7_rw_bitmask = env->cpu_model->CP0_Config7_rw_bitmask; + env->CP0_LLAddr_rw_bitmask = env->cpu_model->CP0_LLAddr_rw_bitmask + << env->cpu_model->CP0_LLAddr_shift; + env->CP0_LLAddr_shift = env->cpu_model->CP0_LLAddr_shift; + env->SYNCI_Step = env->cpu_model->SYNCI_Step; + env->CCRes = env->cpu_model->CCRes; + env->CP0_Status_rw_bitmask = env->cpu_model->CP0_Status_rw_bitmask; + env->CP0_TCStatus_rw_bitmask = env->cpu_model->CP0_TCStatus_rw_bitmask; + env->CP0_SRSCtl = env->cpu_model->CP0_SRSCtl; + env->current_tc = 0; + env->SEGBITS = env->cpu_model->SEGBITS; + env->SEGMask = (target_ulong)((1ULL << env->cpu_model->SEGBITS) - 1); +#if defined(TARGET_MIPS64) + if (env->cpu_model->insn_flags & ISA_MIPS3) { + env->SEGMask |= 3ULL << 62; + } +#endif + env->PABITS = env->cpu_model->PABITS; + env->CP0_SRSConf0_rw_bitmask = env->cpu_model->CP0_SRSConf0_rw_bitmask; + env->CP0_SRSConf0 = env->cpu_model->CP0_SRSConf0; + env->CP0_SRSConf1_rw_bitmask = env->cpu_model->CP0_SRSConf1_rw_bitmask; + env->CP0_SRSConf1 = env->cpu_model->CP0_SRSConf1; + env->CP0_SRSConf2_rw_bitmask = env->cpu_model->CP0_SRSConf2_rw_bitmask; + env->CP0_SRSConf2 = env->cpu_model->CP0_SRSConf2; + env->CP0_SRSConf3_rw_bitmask = env->cpu_model->CP0_SRSConf3_rw_bitmask; + env->CP0_SRSConf3 = env->cpu_model->CP0_SRSConf3; + env->CP0_SRSConf4_rw_bitmask = env->cpu_model->CP0_SRSConf4_rw_bitmask; + env->CP0_SRSConf4 = env->cpu_model->CP0_SRSConf4; + env->CP0_PageGrain_rw_bitmask = env->cpu_model->CP0_PageGrain_rw_bitmask; + env->CP0_PageGrain = env->cpu_model->CP0_PageGrain; + env->CP0_EBaseWG_rw_bitmask = env->cpu_model->CP0_EBaseWG_rw_bitmask; + env->active_fpu.fcr0 = env->cpu_model->CP1_fcr0; + env->active_fpu.fcr31_rw_bitmask = env->cpu_model->CP1_fcr31_rw_bitmask; + env->active_fpu.fcr31 = env->cpu_model->CP1_fcr31; + env->msair = env->cpu_model->MSAIR; + env->insn_flags = env->cpu_model->insn_flags; + +#if defined(CONFIG_USER_ONLY) + env->CP0_Status = (MIPS_HFLAG_UM << CP0St_KSU); +# ifdef TARGET_MIPS64 + /* Enable 64-bit register mode. */ + env->CP0_Status |= (1 << CP0St_PX); +# endif +# ifdef TARGET_ABI_MIPSN64 + /* Enable 64-bit address mode. */ + env->CP0_Status |= (1 << CP0St_UX); +# endif + /* + * Enable access to the CPUNum, SYNCI_Step, CC, and CCRes RDHWR + * hardware registers. + */ + env->CP0_HWREna |= 0x0000000F; + if (env->CP0_Config1 & (1 << CP0C1_FP)) { + env->CP0_Status |= (1 << CP0St_CU1); + } + if (env->CP0_Config3 & (1 << CP0C3_DSPP)) { + env->CP0_Status |= (1 << CP0St_MX); + } +# if defined(TARGET_MIPS64) + /* For MIPS64, init FR bit to 1 if FPU unit is there and bit is writable. */ + if ((env->CP0_Config1 & (1 << CP0C1_FP)) && + (env->CP0_Status_rw_bitmask & (1 << CP0St_FR))) { + env->CP0_Status |= (1 << CP0St_FR); + } +# endif +#else /* !CONFIG_USER_ONLY */ + if (env->hflags & MIPS_HFLAG_BMASK) { + /* + * If the exception was raised from a delay slot, + * come back to the jump. + */ + env->CP0_ErrorEPC = (env->active_tc.PC + - (env->hflags & MIPS_HFLAG_B16 ? 2 : 4)); + } else { + env->CP0_ErrorEPC = env->active_tc.PC; + } + env->active_tc.PC = env->exception_base; + env->CP0_Random = env->tlb->nb_tlb - 1; + env->tlb->tlb_in_use = env->tlb->nb_tlb; + env->CP0_Wired = 0; + env->CP0_GlobalNumber = (cs->cpu_index & 0xFF) << CP0GN_VPId; + env->CP0_EBase = (cs->cpu_index & 0x3FF); + if (mips_um_ksegs_enabled()) { + env->CP0_EBase |= 0x40000000; + } else { + env->CP0_EBase |= (int32_t)0x80000000; + } + if (env->CP0_Config3 & (1 << CP0C3_CMGCR)) { + env->CP0_CMGCRBase = 0x1fbf8000 >> 4; + } + env->CP0_EntryHi_ASID_mask = (env->CP0_Config5 & (1 << CP0C5_MI)) ? + 0x0 : (env->CP0_Config4 & (1 << CP0C4_AE)) ? 0x3ff : 0xff; + env->CP0_Status = (1 << CP0St_BEV) | (1 << CP0St_ERL); + /* + * Vectored interrupts not implemented, timer on int 7, + * no performance counters. + */ + env->CP0_IntCtl = 0xe0000000; + { + int i; + + for (i = 0; i < 7; i++) { + env->CP0_WatchLo[i] = 0; + env->CP0_WatchHi[i] = 0x80000000; + } + env->CP0_WatchLo[7] = 0; + env->CP0_WatchHi[7] = 0; + } + /* Count register increments in debug mode, EJTAG version 1 */ + env->CP0_Debug = (1 << CP0DB_CNT) | (0x1 << CP0DB_VER); + + cpu_mips_store_count(env, 1); + + if (ase_mt_available(env)) { + int i; + + /* Only TC0 on VPE 0 starts as active. */ + for (i = 0; i < ARRAY_SIZE(env->tcs); i++) { + env->tcs[i].CP0_TCBind = cs->cpu_index << CP0TCBd_CurVPE; + env->tcs[i].CP0_TCHalt = 1; + } + env->active_tc.CP0_TCHalt = 1; + cs->halted = 1; + + if (cs->cpu_index == 0) { + /* VPE0 starts up enabled. */ + env->mvp->CP0_MVPControl |= (1 << CP0MVPCo_EVP); + env->CP0_VPEConf0 |= (1 << CP0VPEC0_MVP) | (1 << CP0VPEC0_VPA); + + /* TC0 starts up unhalted. */ + cs->halted = 0; + env->active_tc.CP0_TCHalt = 0; + env->tcs[0].CP0_TCHalt = 0; + /* With thread 0 active. */ + env->active_tc.CP0_TCStatus = (1 << CP0TCSt_A); + env->tcs[0].CP0_TCStatus = (1 << CP0TCSt_A); + } + } + + /* + * Configure default legacy segmentation control. We use this regardless of + * whether segmentation control is presented to the guest. + */ + /* KSeg3 (seg0 0xE0000000..0xFFFFFFFF) */ + env->CP0_SegCtl0 = (CP0SC_AM_MK << CP0SC_AM); + /* KSeg2 (seg1 0xC0000000..0xDFFFFFFF) */ + env->CP0_SegCtl0 |= ((CP0SC_AM_MSK << CP0SC_AM)) << 16; + /* KSeg1 (seg2 0xA0000000..0x9FFFFFFF) */ + env->CP0_SegCtl1 = (0 << CP0SC_PA) | (CP0SC_AM_UK << CP0SC_AM) | + (2 << CP0SC_C); + /* KSeg0 (seg3 0x80000000..0x9FFFFFFF) */ + env->CP0_SegCtl1 |= ((0 << CP0SC_PA) | (CP0SC_AM_UK << CP0SC_AM) | + (3 << CP0SC_C)) << 16; + /* USeg (seg4 0x40000000..0x7FFFFFFF) */ + env->CP0_SegCtl2 = (2 << CP0SC_PA) | (CP0SC_AM_MUSK << CP0SC_AM) | + (1 << CP0SC_EU) | (2 << CP0SC_C); + /* USeg (seg5 0x00000000..0x3FFFFFFF) */ + env->CP0_SegCtl2 |= ((0 << CP0SC_PA) | (CP0SC_AM_MUSK << CP0SC_AM) | + (1 << CP0SC_EU) | (2 << CP0SC_C)) << 16; + /* XKPhys (note, SegCtl2.XR = 0, so XAM won't be used) */ + env->CP0_SegCtl1 |= (CP0SC_AM_UK << CP0SC1_XAM); +#endif /* !CONFIG_USER_ONLY */ + if ((env->insn_flags & ISA_MIPS32R6) && + (env->active_fpu.fcr0 & (1 << FCR0_F64))) { + /* Status.FR = 0 mode in 64-bit FPU not allowed in R6 */ + env->CP0_Status |= (1 << CP0St_FR); + } + + if (env->insn_flags & ISA_MIPS32R6) { + /* PTW = 1 */ + env->CP0_PWSize = 0x40; + /* GDI = 12 */ + /* UDI = 12 */ + /* MDI = 12 */ + /* PRI = 12 */ + /* PTEI = 2 */ + env->CP0_PWField = 0x0C30C302; + } else { + /* GDI = 0 */ + /* UDI = 0 */ + /* MDI = 0 */ + /* PRI = 0 */ + /* PTEI = 2 */ + env->CP0_PWField = 0x02; + } + + if (env->CP0_Config3 & (1 << CP0C3_ISA) & (1 << (CP0C3_ISA + 1))) { + /* microMIPS on reset when Config3.ISA is 3 */ + env->hflags |= MIPS_HFLAG_M16; + } + + /* MSA */ + if (env->CP0_Config3 & (1 << CP0C3_MSAP)) { + msa_reset(env); + } + + compute_hflags(env); + restore_fp_status(env); + restore_pamask(env); + cs->exception_index = EXCP_NONE; + + if (semihosting_get_argc()) { + /* UHI interface can be used to obtain argc and argv */ + env->active_tc.gpr[4] = -1; + } +} + static void mips_cpu_reset(DeviceState *dev) { CPUState *s = CPU(dev); @@ -156,6 +389,7 @@ static void mips_cpu_realizefn(DeviceState *dev, Error **errp) { CPUState *cs = CPU(dev); MIPSCPU *cpu = MIPS_CPU(dev); + CPUMIPSState *env = &cpu->env; MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(dev); Error *local_err = NULL; @@ -179,7 +413,13 @@ static void mips_cpu_realizefn(DeviceState *dev, Error **errp) return; } - cpu_mips_realize_env(&cpu->env); + env->exception_base = (int32_t)0xBFC00000; + +#ifndef CONFIG_USER_ONLY + mmu_init(env, env->cpu_model); +#endif + fpu_init(env, env->cpu_model); + mvp_init(env); cpu_reset(cs); qemu_init_vcpu(cs); @@ -299,6 +539,38 @@ static void mips_cpu_register_types(void) type_init(mips_cpu_register_types) +static void mips_cpu_add_definition(gpointer data, gpointer user_data) +{ + ObjectClass *oc = data; + CpuDefinitionInfoList **cpu_list = user_data; + CpuDefinitionInfoList *entry; + CpuDefinitionInfo *info; + const char *typename; + + typename = object_class_get_name(oc); + info = g_malloc0(sizeof(*info)); + info->name = g_strndup(typename, + strlen(typename) - strlen("-" TYPE_MIPS_CPU)); + info->q_typename = g_strdup(typename); + + entry = g_malloc0(sizeof(*entry)); + entry->value = info; + entry->next = *cpu_list; + *cpu_list = entry; +} + +CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp) +{ + CpuDefinitionInfoList *cpu_list = NULL; + GSList *list; + + list = object_class_get_list(TYPE_MIPS_CPU, false); + g_slist_foreach(list, mips_cpu_add_definition, &cpu_list); + g_slist_free(list); + + return cpu_list; +} + /* Could be used by generic CPU object */ MIPSCPU *mips_cpu_create_with_clock(const char *cpu_type, Clock *cpu_refclk) { @@ -310,3 +582,26 @@ MIPSCPU *mips_cpu_create_with_clock(const char *cpu_type, Clock *cpu_refclk) return MIPS_CPU(cpu); } + +bool cpu_supports_isa(const CPUMIPSState *env, uint64_t isa_mask) +{ + return (env->cpu_model->insn_flags & isa_mask) != 0; +} + +bool cpu_type_supports_isa(const char *cpu_type, uint64_t isa) +{ + const MIPSCPUClass *mcc = MIPS_CPU_CLASS(object_class_by_name(cpu_type)); + return (mcc->cpu_def->insn_flags & isa) != 0; +} + +bool cpu_type_supports_cps_smp(const char *cpu_type) +{ + const MIPSCPUClass *mcc = MIPS_CPU_CLASS(object_class_by_name(cpu_type)); + return (mcc->cpu_def->CP0_Config3 & (1 << CP0C3_CMGCR)) != 0; +} + +void cpu_set_exception_base(int vp_index, target_ulong address) +{ + MIPSCPU *vp = MIPS_CPU(qemu_get_cpu(vp_index)); + vp->env.exception_base = address; +} |