| /* |
| * PowerPC exception emulation helpers for QEMU. |
| * |
| * Copyright (c) 2003-2007 Jocelyn Mayer |
| * |
| * 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 |
| * Lesser 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/>. |
| */ |
| #include "qemu/osdep.h" |
| #include "cpu.h" |
| #include "exec/helper-proto.h" |
| #include "exec/exec-all.h" |
| #include "exec/cpu_ldst.h" |
| |
| #include "helper_regs.h" |
| |
| //#define DEBUG_OP |
| //#define DEBUG_SOFTWARE_TLB |
| //#define DEBUG_EXCEPTIONS |
| |
| #ifdef DEBUG_EXCEPTIONS |
| # define LOG_EXCP(...) qemu_log(__VA_ARGS__) |
| #else |
| # define LOG_EXCP(...) do { } while (0) |
| #endif |
| |
| /*****************************************************************************/ |
| /* PowerPC Hypercall emulation */ |
| |
| void (*cpu_ppc_hypercall)(PowerPCCPU *); |
| |
| /*****************************************************************************/ |
| /* Exception processing */ |
| #if defined(CONFIG_USER_ONLY) |
| void ppc_cpu_do_interrupt(CPUState *cs) |
| { |
| PowerPCCPU *cpu = POWERPC_CPU(cs); |
| CPUPPCState *env = &cpu->env; |
| |
| cs->exception_index = POWERPC_EXCP_NONE; |
| env->error_code = 0; |
| } |
| |
| static void ppc_hw_interrupt(CPUPPCState *env) |
| { |
| CPUState *cs = CPU(ppc_env_get_cpu(env)); |
| |
| cs->exception_index = POWERPC_EXCP_NONE; |
| env->error_code = 0; |
| } |
| #else /* defined(CONFIG_USER_ONLY) */ |
| static inline void dump_syscall(CPUPPCState *env) |
| { |
| qemu_log_mask(CPU_LOG_INT, "syscall r0=%016" PRIx64 " r3=%016" PRIx64 |
| " r4=%016" PRIx64 " r5=%016" PRIx64 " r6=%016" PRIx64 |
| " nip=" TARGET_FMT_lx "\n", |
| ppc_dump_gpr(env, 0), ppc_dump_gpr(env, 3), |
| ppc_dump_gpr(env, 4), ppc_dump_gpr(env, 5), |
| ppc_dump_gpr(env, 6), env->nip); |
| } |
| |
| /* Note that this function should be greatly optimized |
| * when called with a constant excp, from ppc_hw_interrupt |
| */ |
| static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp) |
| { |
| CPUState *cs = CPU(cpu); |
| CPUPPCState *env = &cpu->env; |
| target_ulong msr, new_msr, vector; |
| int srr0, srr1, asrr0, asrr1, lev, ail; |
| bool lpes0; |
| |
| qemu_log_mask(CPU_LOG_INT, "Raise exception at " TARGET_FMT_lx |
| " => %08x (%02x)\n", env->nip, excp, env->error_code); |
| |
| /* new srr1 value excluding must-be-zero bits */ |
| if (excp_model == POWERPC_EXCP_BOOKE) { |
| msr = env->msr; |
| } else { |
| msr = env->msr & ~0x783f0000ULL; |
| } |
| |
| /* new interrupt handler msr preserves existing HV and ME unless |
| * explicitly overriden |
| */ |
| new_msr = env->msr & (((target_ulong)1 << MSR_ME) | MSR_HVB); |
| |
| /* target registers */ |
| srr0 = SPR_SRR0; |
| srr1 = SPR_SRR1; |
| asrr0 = -1; |
| asrr1 = -1; |
| |
| /* check for special resume at 0x100 from doze/nap/sleep/winkle on P7/P8 */ |
| if (env->in_pm_state) { |
| env->in_pm_state = false; |
| |
| /* Pretend to be returning from doze always as we don't lose state */ |
| msr |= (0x1ull << (63 - 47)); |
| |
| /* Non-machine check are routed to 0x100 with a wakeup cause |
| * encoded in SRR1 |
| */ |
| if (excp != POWERPC_EXCP_MCHECK) { |
| switch (excp) { |
| case POWERPC_EXCP_RESET: |
| msr |= 0x4ull << (63 - 45); |
| break; |
| case POWERPC_EXCP_EXTERNAL: |
| msr |= 0x8ull << (63 - 45); |
| break; |
| case POWERPC_EXCP_DECR: |
| msr |= 0x6ull << (63 - 45); |
| break; |
| case POWERPC_EXCP_SDOOR: |
| msr |= 0x5ull << (63 - 45); |
| break; |
| case POWERPC_EXCP_SDOOR_HV: |
| msr |= 0x3ull << (63 - 45); |
| break; |
| case POWERPC_EXCP_HV_MAINT: |
| msr |= 0xaull << (63 - 45); |
| break; |
| default: |
| cpu_abort(cs, "Unsupported exception %d in Power Save mode\n", |
| excp); |
| } |
| excp = POWERPC_EXCP_RESET; |
| } |
| } |
| |
| /* Exception targetting modifiers |
| * |
| * LPES0 is supported on POWER7/8 |
| * LPES1 is not supported (old iSeries mode) |
| * |
| * On anything else, we behave as if LPES0 is 1 |
| * (externals don't alter MSR:HV) |
| * |
| * AIL is initialized here but can be cleared by |
| * selected exceptions |
| */ |
| #if defined(TARGET_PPC64) |
| if (excp_model == POWERPC_EXCP_POWER7 || |
| excp_model == POWERPC_EXCP_POWER8) { |
| lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0); |
| if (excp_model == POWERPC_EXCP_POWER8) { |
| ail = (env->spr[SPR_LPCR] & LPCR_AIL) >> LPCR_AIL_SHIFT; |
| } else { |
| ail = 0; |
| } |
| } else |
| #endif /* defined(TARGET_PPC64) */ |
| { |
| lpes0 = true; |
| ail = 0; |
| } |
| |
| /* Hypervisor emulation assistance interrupt only exists on server |
| * arch 2.05 server or later. We also don't want to generate it if |
| * we don't have HVB in msr_mask (PAPR mode). |
| */ |
| if (excp == POWERPC_EXCP_HV_EMU |
| #if defined(TARGET_PPC64) |
| && !((env->mmu_model & POWERPC_MMU_64) && (env->msr_mask & MSR_HVB)) |
| #endif /* defined(TARGET_PPC64) */ |
| |
| ) { |
| excp = POWERPC_EXCP_PROGRAM; |
| } |
| |
| switch (excp) { |
| case POWERPC_EXCP_NONE: |
| /* Should never happen */ |
| return; |
| case POWERPC_EXCP_CRITICAL: /* Critical input */ |
| switch (excp_model) { |
| case POWERPC_EXCP_40x: |
| srr0 = SPR_40x_SRR2; |
| srr1 = SPR_40x_SRR3; |
| break; |
| case POWERPC_EXCP_BOOKE: |
| srr0 = SPR_BOOKE_CSRR0; |
| srr1 = SPR_BOOKE_CSRR1; |
| break; |
| case POWERPC_EXCP_G2: |
| break; |
| default: |
| goto excp_invalid; |
| } |
| break; |
| case POWERPC_EXCP_MCHECK: /* Machine check exception */ |
| if (msr_me == 0) { |
| /* Machine check exception is not enabled. |
| * Enter checkstop state. |
| */ |
| fprintf(stderr, "Machine check while not allowed. " |
| "Entering checkstop state\n"); |
| if (qemu_log_separate()) { |
| qemu_log("Machine check while not allowed. " |
| "Entering checkstop state\n"); |
| } |
| cs->halted = 1; |
| cs->interrupt_request |= CPU_INTERRUPT_EXITTB; |
| } |
| new_msr |= (target_ulong)MSR_HVB; |
| ail = 0; |
| |
| /* machine check exceptions don't have ME set */ |
| new_msr &= ~((target_ulong)1 << MSR_ME); |
| |
| /* XXX: should also have something loaded in DAR / DSISR */ |
| switch (excp_model) { |
| case POWERPC_EXCP_40x: |
| srr0 = SPR_40x_SRR2; |
| srr1 = SPR_40x_SRR3; |
| break; |
| case POWERPC_EXCP_BOOKE: |
| /* FIXME: choose one or the other based on CPU type */ |
| srr0 = SPR_BOOKE_MCSRR0; |
| srr1 = SPR_BOOKE_MCSRR1; |
| asrr0 = SPR_BOOKE_CSRR0; |
| asrr1 = SPR_BOOKE_CSRR1; |
| break; |
| default: |
| break; |
| } |
| break; |
| case POWERPC_EXCP_DSI: /* Data storage exception */ |
| LOG_EXCP("DSI exception: DSISR=" TARGET_FMT_lx" DAR=" TARGET_FMT_lx |
| "\n", env->spr[SPR_DSISR], env->spr[SPR_DAR]); |
| break; |
| case POWERPC_EXCP_ISI: /* Instruction storage exception */ |
| LOG_EXCP("ISI exception: msr=" TARGET_FMT_lx ", nip=" TARGET_FMT_lx |
| "\n", msr, env->nip); |
| msr |= env->error_code; |
| break; |
| case POWERPC_EXCP_EXTERNAL: /* External input */ |
| cs = CPU(cpu); |
| |
| if (!lpes0) { |
| new_msr |= (target_ulong)MSR_HVB; |
| new_msr |= env->msr & ((target_ulong)1 << MSR_RI); |
| srr0 = SPR_HSRR0; |
| srr1 = SPR_HSRR1; |
| } |
| if (env->mpic_proxy) { |
| /* IACK the IRQ on delivery */ |
| env->spr[SPR_BOOKE_EPR] = ldl_phys(cs->as, env->mpic_iack); |
| } |
| break; |
| case POWERPC_EXCP_ALIGN: /* Alignment exception */ |
| /* Get rS/rD and rA from faulting opcode */ |
| /* Note: the opcode fields will not be set properly for a direct |
| * store load/store, but nobody cares as nobody actually uses |
| * direct store segments. |
| */ |
| env->spr[SPR_DSISR] |= (env->error_code & 0x03FF0000) >> 16; |
| break; |
| case POWERPC_EXCP_PROGRAM: /* Program exception */ |
| switch (env->error_code & ~0xF) { |
| case POWERPC_EXCP_FP: |
| if ((msr_fe0 == 0 && msr_fe1 == 0) || msr_fp == 0) { |
| LOG_EXCP("Ignore floating point exception\n"); |
| cs->exception_index = POWERPC_EXCP_NONE; |
| env->error_code = 0; |
| return; |
| } |
| |
| /* FP exceptions always have NIP pointing to the faulting |
| * instruction, so always use store_next and claim we are |
| * precise in the MSR. |
| */ |
| msr |= 0x00100000; |
| break; |
| case POWERPC_EXCP_INVAL: |
| LOG_EXCP("Invalid instruction at " TARGET_FMT_lx "\n", env->nip); |
| msr |= 0x00080000; |
| env->spr[SPR_BOOKE_ESR] = ESR_PIL; |
| break; |
| case POWERPC_EXCP_PRIV: |
| msr |= 0x00040000; |
| env->spr[SPR_BOOKE_ESR] = ESR_PPR; |
| break; |
| case POWERPC_EXCP_TRAP: |
| msr |= 0x00020000; |
| env->spr[SPR_BOOKE_ESR] = ESR_PTR; |
| break; |
| default: |
| /* Should never occur */ |
| cpu_abort(cs, "Invalid program exception %d. Aborting\n", |
| env->error_code); |
| break; |
| } |
| break; |
| case POWERPC_EXCP_SYSCALL: /* System call exception */ |
| dump_syscall(env); |
| lev = env->error_code; |
| |
| /* We need to correct the NIP which in this case is supposed |
| * to point to the next instruction |
| */ |
| env->nip += 4; |
| |
| /* "PAPR mode" built-in hypercall emulation */ |
| if ((lev == 1) && cpu_ppc_hypercall) { |
| cpu_ppc_hypercall(cpu); |
| return; |
| } |
| if (lev == 1) { |
| new_msr |= (target_ulong)MSR_HVB; |
| } |
| break; |
| case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ |
| case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */ |
| case POWERPC_EXCP_DECR: /* Decrementer exception */ |
| break; |
| case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */ |
| /* FIT on 4xx */ |
| LOG_EXCP("FIT exception\n"); |
| break; |
| case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */ |
| LOG_EXCP("WDT exception\n"); |
| switch (excp_model) { |
| case POWERPC_EXCP_BOOKE: |
| srr0 = SPR_BOOKE_CSRR0; |
| srr1 = SPR_BOOKE_CSRR1; |
| break; |
| default: |
| break; |
| } |
| break; |
| case POWERPC_EXCP_DTLB: /* Data TLB error */ |
| case POWERPC_EXCP_ITLB: /* Instruction TLB error */ |
| break; |
| case POWERPC_EXCP_DEBUG: /* Debug interrupt */ |
| switch (excp_model) { |
| case POWERPC_EXCP_BOOKE: |
| /* FIXME: choose one or the other based on CPU type */ |
| srr0 = SPR_BOOKE_DSRR0; |
| srr1 = SPR_BOOKE_DSRR1; |
| asrr0 = SPR_BOOKE_CSRR0; |
| asrr1 = SPR_BOOKE_CSRR1; |
| break; |
| default: |
| break; |
| } |
| /* XXX: TODO */ |
| cpu_abort(cs, "Debug exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavailable */ |
| env->spr[SPR_BOOKE_ESR] = ESR_SPV; |
| break; |
| case POWERPC_EXCP_EFPDI: /* Embedded floating-point data interrupt */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "Embedded floating point data exception " |
| "is not implemented yet !\n"); |
| env->spr[SPR_BOOKE_ESR] = ESR_SPV; |
| break; |
| case POWERPC_EXCP_EFPRI: /* Embedded floating-point round interrupt */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "Embedded floating point round exception " |
| "is not implemented yet !\n"); |
| env->spr[SPR_BOOKE_ESR] = ESR_SPV; |
| break; |
| case POWERPC_EXCP_EPERFM: /* Embedded performance monitor interrupt */ |
| /* XXX: TODO */ |
| cpu_abort(cs, |
| "Performance counter exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */ |
| break; |
| case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */ |
| srr0 = SPR_BOOKE_CSRR0; |
| srr1 = SPR_BOOKE_CSRR1; |
| break; |
| case POWERPC_EXCP_RESET: /* System reset exception */ |
| /* A power-saving exception sets ME, otherwise it is unchanged */ |
| if (msr_pow) { |
| /* indicate that we resumed from power save mode */ |
| msr |= 0x10000; |
| new_msr |= ((target_ulong)1 << MSR_ME); |
| } |
| |
| new_msr |= (target_ulong)MSR_HVB; |
| ail = 0; |
| break; |
| case POWERPC_EXCP_DSEG: /* Data segment exception */ |
| case POWERPC_EXCP_ISEG: /* Instruction segment exception */ |
| case POWERPC_EXCP_TRACE: /* Trace exception */ |
| break; |
| case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ |
| case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ |
| case POWERPC_EXCP_HISI: /* Hypervisor instruction storage exception */ |
| case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ |
| case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment exception */ |
| case POWERPC_EXCP_HV_EMU: |
| srr0 = SPR_HSRR0; |
| srr1 = SPR_HSRR1; |
| new_msr |= (target_ulong)MSR_HVB; |
| new_msr |= env->msr & ((target_ulong)1 << MSR_RI); |
| break; |
| case POWERPC_EXCP_VPU: /* Vector unavailable exception */ |
| case POWERPC_EXCP_VSXU: /* VSX unavailable exception */ |
| case POWERPC_EXCP_FU: /* Facility unavailable exception */ |
| break; |
| case POWERPC_EXCP_PIT: /* Programmable interval timer interrupt */ |
| LOG_EXCP("PIT exception\n"); |
| break; |
| case POWERPC_EXCP_IO: /* IO error exception */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "601 IO error exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_RUNM: /* Run mode exception */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "601 run mode exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_EMUL: /* Emulation trap exception */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "602 emulation trap exception " |
| "is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */ |
| switch (excp_model) { |
| case POWERPC_EXCP_602: |
| case POWERPC_EXCP_603: |
| case POWERPC_EXCP_603E: |
| case POWERPC_EXCP_G2: |
| goto tlb_miss_tgpr; |
| case POWERPC_EXCP_7x5: |
| goto tlb_miss; |
| case POWERPC_EXCP_74xx: |
| goto tlb_miss_74xx; |
| default: |
| cpu_abort(cs, "Invalid instruction TLB miss exception\n"); |
| break; |
| } |
| break; |
| case POWERPC_EXCP_DLTLB: /* Data load TLB miss */ |
| switch (excp_model) { |
| case POWERPC_EXCP_602: |
| case POWERPC_EXCP_603: |
| case POWERPC_EXCP_603E: |
| case POWERPC_EXCP_G2: |
| goto tlb_miss_tgpr; |
| case POWERPC_EXCP_7x5: |
| goto tlb_miss; |
| case POWERPC_EXCP_74xx: |
| goto tlb_miss_74xx; |
| default: |
| cpu_abort(cs, "Invalid data load TLB miss exception\n"); |
| break; |
| } |
| break; |
| case POWERPC_EXCP_DSTLB: /* Data store TLB miss */ |
| switch (excp_model) { |
| case POWERPC_EXCP_602: |
| case POWERPC_EXCP_603: |
| case POWERPC_EXCP_603E: |
| case POWERPC_EXCP_G2: |
| tlb_miss_tgpr: |
| /* Swap temporary saved registers with GPRs */ |
| if (!(new_msr & ((target_ulong)1 << MSR_TGPR))) { |
| new_msr |= (target_ulong)1 << MSR_TGPR; |
| hreg_swap_gpr_tgpr(env); |
| } |
| goto tlb_miss; |
| case POWERPC_EXCP_7x5: |
| tlb_miss: |
| #if defined(DEBUG_SOFTWARE_TLB) |
| if (qemu_log_enabled()) { |
| const char *es; |
| target_ulong *miss, *cmp; |
| int en; |
| |
| if (excp == POWERPC_EXCP_IFTLB) { |
| es = "I"; |
| en = 'I'; |
| miss = &env->spr[SPR_IMISS]; |
| cmp = &env->spr[SPR_ICMP]; |
| } else { |
| if (excp == POWERPC_EXCP_DLTLB) { |
| es = "DL"; |
| } else { |
| es = "DS"; |
| } |
| en = 'D'; |
| miss = &env->spr[SPR_DMISS]; |
| cmp = &env->spr[SPR_DCMP]; |
| } |
| qemu_log("6xx %sTLB miss: %cM " TARGET_FMT_lx " %cC " |
| TARGET_FMT_lx " H1 " TARGET_FMT_lx " H2 " |
| TARGET_FMT_lx " %08x\n", es, en, *miss, en, *cmp, |
| env->spr[SPR_HASH1], env->spr[SPR_HASH2], |
| env->error_code); |
| } |
| #endif |
| msr |= env->crf[0] << 28; |
| msr |= env->error_code; /* key, D/I, S/L bits */ |
| /* Set way using a LRU mechanism */ |
| msr |= ((env->last_way + 1) & (env->nb_ways - 1)) << 17; |
| break; |
| case POWERPC_EXCP_74xx: |
| tlb_miss_74xx: |
| #if defined(DEBUG_SOFTWARE_TLB) |
| if (qemu_log_enabled()) { |
| const char *es; |
| target_ulong *miss, *cmp; |
| int en; |
| |
| if (excp == POWERPC_EXCP_IFTLB) { |
| es = "I"; |
| en = 'I'; |
| miss = &env->spr[SPR_TLBMISS]; |
| cmp = &env->spr[SPR_PTEHI]; |
| } else { |
| if (excp == POWERPC_EXCP_DLTLB) { |
| es = "DL"; |
| } else { |
| es = "DS"; |
| } |
| en = 'D'; |
| miss = &env->spr[SPR_TLBMISS]; |
| cmp = &env->spr[SPR_PTEHI]; |
| } |
| qemu_log("74xx %sTLB miss: %cM " TARGET_FMT_lx " %cC " |
| TARGET_FMT_lx " %08x\n", es, en, *miss, en, *cmp, |
| env->error_code); |
| } |
| #endif |
| msr |= env->error_code; /* key bit */ |
| break; |
| default: |
| cpu_abort(cs, "Invalid data store TLB miss exception\n"); |
| break; |
| } |
| break; |
| case POWERPC_EXCP_FPA: /* Floating-point assist exception */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "Floating point assist exception " |
| "is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_DABR: /* Data address breakpoint */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "DABR exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "IABR exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_SMI: /* System management interrupt */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "SMI exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_THERM: /* Thermal interrupt */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "Thermal management exception " |
| "is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_PERFM: /* Embedded performance monitor interrupt */ |
| /* XXX: TODO */ |
| cpu_abort(cs, |
| "Performance counter exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_VPUA: /* Vector assist exception */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "VPU assist exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_SOFTP: /* Soft patch exception */ |
| /* XXX: TODO */ |
| cpu_abort(cs, |
| "970 soft-patch exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_MAINT: /* Maintenance exception */ |
| /* XXX: TODO */ |
| cpu_abort(cs, |
| "970 maintenance exception is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_MEXTBR: /* Maskable external breakpoint */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "Maskable external exception " |
| "is not implemented yet !\n"); |
| break; |
| case POWERPC_EXCP_NMEXTBR: /* Non maskable external breakpoint */ |
| /* XXX: TODO */ |
| cpu_abort(cs, "Non maskable external exception " |
| "is not implemented yet !\n"); |
| break; |
| default: |
| excp_invalid: |
| cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); |
| break; |
| } |
| |
| /* Save PC */ |
| env->spr[srr0] = env->nip; |
| |
| /* Save MSR */ |
| env->spr[srr1] = msr; |
| |
| /* Sanity check */ |
| if (!(env->msr_mask & MSR_HVB) && (srr0 == SPR_HSRR0)) { |
| cpu_abort(cs, "Trying to deliver HV exception %d with " |
| "no HV support\n", excp); |
| } |
| |
| /* If any alternate SRR register are defined, duplicate saved values */ |
| if (asrr0 != -1) { |
| env->spr[asrr0] = env->spr[srr0]; |
| } |
| if (asrr1 != -1) { |
| env->spr[asrr1] = env->spr[srr1]; |
| } |
| |
| /* Sort out endianness of interrupt, this differs depending on the |
| * CPU, the HV mode, etc... |
| */ |
| #ifdef TARGET_PPC64 |
| if (excp_model == POWERPC_EXCP_POWER7) { |
| if (!(new_msr & MSR_HVB) && (env->spr[SPR_LPCR] & LPCR_ILE)) { |
| new_msr |= (target_ulong)1 << MSR_LE; |
| } |
| } else if (excp_model == POWERPC_EXCP_POWER8) { |
| if (new_msr & MSR_HVB) { |
| if (env->spr[SPR_HID0] & HID0_HILE) { |
| new_msr |= (target_ulong)1 << MSR_LE; |
| } |
| } else if (env->spr[SPR_LPCR] & LPCR_ILE) { |
| new_msr |= (target_ulong)1 << MSR_LE; |
| } |
| } else if (msr_ile) { |
| new_msr |= (target_ulong)1 << MSR_LE; |
| } |
| #else |
| if (msr_ile) { |
| new_msr |= (target_ulong)1 << MSR_LE; |
| } |
| #endif |
| |
| /* Jump to handler */ |
| vector = env->excp_vectors[excp]; |
| if (vector == (target_ulong)-1ULL) { |
| cpu_abort(cs, "Raised an exception without defined vector %d\n", |
| excp); |
| } |
| vector |= env->excp_prefix; |
| |
| /* AIL only works if there is no HV transition and we are running with |
| * translations enabled |
| */ |
| if (!((msr >> MSR_IR) & 1) || !((msr >> MSR_DR) & 1) || |
| ((new_msr & MSR_HVB) && !(msr & MSR_HVB))) { |
| ail = 0; |
| } |
| /* Handle AIL */ |
| if (ail) { |
| new_msr |= (1 << MSR_IR) | (1 << MSR_DR); |
| switch(ail) { |
| case AIL_0001_8000: |
| vector |= 0x18000; |
| break; |
| case AIL_C000_0000_0000_4000: |
| vector |= 0xc000000000004000ull; |
| break; |
| default: |
| cpu_abort(cs, "Invalid AIL combination %d\n", ail); |
| break; |
| } |
| } |
| |
| #if defined(TARGET_PPC64) |
| if (excp_model == POWERPC_EXCP_BOOKE) { |
| if (env->spr[SPR_BOOKE_EPCR] & EPCR_ICM) { |
| /* Cat.64-bit: EPCR.ICM is copied to MSR.CM */ |
| new_msr |= (target_ulong)1 << MSR_CM; |
| } else { |
| vector = (uint32_t)vector; |
| } |
| } else { |
| if (!msr_isf && !(env->mmu_model & POWERPC_MMU_64)) { |
| vector = (uint32_t)vector; |
| } else { |
| new_msr |= (target_ulong)1 << MSR_SF; |
| } |
| } |
| #endif |
| /* We don't use hreg_store_msr here as already have treated |
| * any special case that could occur. Just store MSR and update hflags |
| * |
| * Note: We *MUST* not use hreg_store_msr() as-is anyway because it |
| * will prevent setting of the HV bit which some exceptions might need |
| * to do. |
| */ |
| env->msr = new_msr & env->msr_mask; |
| hreg_compute_hflags(env); |
| env->nip = vector; |
| /* Reset exception state */ |
| cs->exception_index = POWERPC_EXCP_NONE; |
| env->error_code = 0; |
| |
| /* Any interrupt is context synchronizing, check if TCG TLB |
| * needs a delayed flush on ppc64 |
| */ |
| check_tlb_flush(env, false); |
| } |
| |
| void ppc_cpu_do_interrupt(CPUState *cs) |
| { |
| PowerPCCPU *cpu = POWERPC_CPU(cs); |
| CPUPPCState *env = &cpu->env; |
| |
| powerpc_excp(cpu, env->excp_model, cs->exception_index); |
| } |
| |
| static void ppc_hw_interrupt(CPUPPCState *env) |
| { |
| PowerPCCPU *cpu = ppc_env_get_cpu(env); |
| #if 0 |
| CPUState *cs = CPU(cpu); |
| |
| qemu_log_mask(CPU_LOG_INT, "%s: %p pending %08x req %08x me %d ee %d\n", |
| __func__, env, env->pending_interrupts, |
| cs->interrupt_request, (int)msr_me, (int)msr_ee); |
| #endif |
| /* External reset */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_RESET)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_RESET); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_RESET); |
| return; |
| } |
| /* Machine check exception */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_MCK)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_MCK); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_MCHECK); |
| return; |
| } |
| #if 0 /* TODO */ |
| /* External debug exception */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_DEBUG)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DEBUG); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_DEBUG); |
| return; |
| } |
| #endif |
| /* Hypervisor decrementer exception */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_HDECR)) { |
| /* LPCR will be clear when not supported so this will work */ |
| bool hdice = !!(env->spr[SPR_LPCR] & LPCR_HDICE); |
| if ((msr_ee != 0 || msr_hv == 0) && hdice) { |
| /* HDEC clears on delivery */ |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_HDECR); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_HDECR); |
| return; |
| } |
| } |
| /* Extermal interrupt can ignore MSR:EE under some circumstances */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_EXT)) { |
| bool lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0); |
| if (msr_ee != 0 || (env->has_hv_mode && msr_hv == 0 && !lpes0)) { |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_EXTERNAL); |
| return; |
| } |
| } |
| if (msr_ce != 0) { |
| /* External critical interrupt */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_CEXT)) { |
| /* Taking a critical external interrupt does not clear the external |
| * critical interrupt status |
| */ |
| #if 0 |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_CEXT); |
| #endif |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_CRITICAL); |
| return; |
| } |
| } |
| if (msr_ee != 0) { |
| /* Watchdog timer on embedded PowerPC */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_WDT)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_WDT); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_WDT); |
| return; |
| } |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_CDOORBELL)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_CDOORBELL); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_DOORCI); |
| return; |
| } |
| /* Fixed interval timer on embedded PowerPC */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_FIT)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_FIT); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_FIT); |
| return; |
| } |
| /* Programmable interval timer on embedded PowerPC */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_PIT)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_PIT); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_PIT); |
| return; |
| } |
| /* Decrementer exception */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_DECR)) { |
| if (ppc_decr_clear_on_delivery(env)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DECR); |
| } |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_DECR); |
| return; |
| } |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_DOORBELL)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DOORBELL); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_DOORI); |
| return; |
| } |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_PERFM)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_PERFM); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_PERFM); |
| return; |
| } |
| /* Thermal interrupt */ |
| if (env->pending_interrupts & (1 << PPC_INTERRUPT_THERM)) { |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_THERM); |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_THERM); |
| return; |
| } |
| } |
| } |
| |
| void ppc_cpu_do_system_reset(CPUState *cs) |
| { |
| PowerPCCPU *cpu = POWERPC_CPU(cs); |
| CPUPPCState *env = &cpu->env; |
| |
| powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_RESET); |
| } |
| #endif /* !CONFIG_USER_ONLY */ |
| |
| bool ppc_cpu_exec_interrupt(CPUState *cs, int interrupt_request) |
| { |
| PowerPCCPU *cpu = POWERPC_CPU(cs); |
| CPUPPCState *env = &cpu->env; |
| |
| if (interrupt_request & CPU_INTERRUPT_HARD) { |
| ppc_hw_interrupt(env); |
| if (env->pending_interrupts == 0) { |
| cs->interrupt_request &= ~CPU_INTERRUPT_HARD; |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| #if defined(DEBUG_OP) |
| static void cpu_dump_rfi(target_ulong RA, target_ulong msr) |
| { |
| qemu_log("Return from exception at " TARGET_FMT_lx " with flags " |
| TARGET_FMT_lx "\n", RA, msr); |
| } |
| #endif |
| |
| /*****************************************************************************/ |
| /* Exceptions processing helpers */ |
| |
| void raise_exception_err_ra(CPUPPCState *env, uint32_t exception, |
| uint32_t error_code, uintptr_t raddr) |
| { |
| CPUState *cs = CPU(ppc_env_get_cpu(env)); |
| |
| cs->exception_index = exception; |
| env->error_code = error_code; |
| cpu_loop_exit_restore(cs, raddr); |
| } |
| |
| void raise_exception_err(CPUPPCState *env, uint32_t exception, |
| uint32_t error_code) |
| { |
| raise_exception_err_ra(env, exception, error_code, 0); |
| } |
| |
| void raise_exception(CPUPPCState *env, uint32_t exception) |
| { |
| raise_exception_err_ra(env, exception, 0, 0); |
| } |
| |
| void raise_exception_ra(CPUPPCState *env, uint32_t exception, |
| uintptr_t raddr) |
| { |
| raise_exception_err_ra(env, exception, 0, raddr); |
| } |
| |
| void helper_raise_exception_err(CPUPPCState *env, uint32_t exception, |
| uint32_t error_code) |
| { |
| raise_exception_err_ra(env, exception, error_code, 0); |
| } |
| |
| void helper_raise_exception(CPUPPCState *env, uint32_t exception) |
| { |
| raise_exception_err_ra(env, exception, 0, 0); |
| } |
| |
| #if !defined(CONFIG_USER_ONLY) |
| void helper_store_msr(CPUPPCState *env, target_ulong val) |
| { |
| uint32_t excp = hreg_store_msr(env, val, 0); |
| |
| if (excp != 0) { |
| CPUState *cs = CPU(ppc_env_get_cpu(env)); |
| cs->interrupt_request |= CPU_INTERRUPT_EXITTB; |
| raise_exception(env, excp); |
| } |
| } |
| |
| #if defined(TARGET_PPC64) |
| void helper_pminsn(CPUPPCState *env, powerpc_pm_insn_t insn) |
| { |
| CPUState *cs; |
| |
| cs = CPU(ppc_env_get_cpu(env)); |
| cs->halted = 1; |
| env->in_pm_state = true; |
| |
| /* The architecture specifies that HDEC interrupts are |
| * discarded in PM states |
| */ |
| env->pending_interrupts &= ~(1 << PPC_INTERRUPT_HDECR); |
| |
| /* Technically, nap doesn't set EE, but if we don't set it |
| * then ppc_hw_interrupt() won't deliver. We could add some |
| * other tests there based on LPCR but it's simpler to just |
| * whack EE in. It will be cleared by the 0x100 at wakeup |
| * anyway. It will still be observable by the guest in SRR1 |
| * but this doesn't seem to be a problem. |
| */ |
| env->msr |= (1ull << MSR_EE); |
| raise_exception(env, EXCP_HLT); |
| } |
| #endif /* defined(TARGET_PPC64) */ |
| |
| static inline void do_rfi(CPUPPCState *env, target_ulong nip, target_ulong msr) |
| { |
| CPUState *cs = CPU(ppc_env_get_cpu(env)); |
| |
| /* MSR:POW cannot be set by any form of rfi */ |
| msr &= ~(1ULL << MSR_POW); |
| |
| #if defined(TARGET_PPC64) |
| /* Switching to 32-bit ? Crop the nip */ |
| if (!msr_is_64bit(env, msr)) { |
| nip = (uint32_t)nip; |
| } |
| #else |
| nip = (uint32_t)nip; |
| #endif |
| /* XXX: beware: this is false if VLE is supported */ |
| env->nip = nip & ~((target_ulong)0x00000003); |
| hreg_store_msr(env, msr, 1); |
| #if defined(DEBUG_OP) |
| cpu_dump_rfi(env->nip, env->msr); |
| #endif |
| /* No need to raise an exception here, |
| * as rfi is always the last insn of a TB |
| */ |
| cs->interrupt_request |= CPU_INTERRUPT_EXITTB; |
| |
| /* Context synchronizing: check if TCG TLB needs flush */ |
| check_tlb_flush(env, false); |
| } |
| |
| void helper_rfi(CPUPPCState *env) |
| { |
| do_rfi(env, env->spr[SPR_SRR0], env->spr[SPR_SRR1] & 0xfffffffful); |
| } |
| |
| #define MSR_BOOK3S_MASK |
| #if defined(TARGET_PPC64) |
| void helper_rfid(CPUPPCState *env) |
| { |
| /* The architeture defines a number of rules for which bits |
| * can change but in practice, we handle this in hreg_store_msr() |
| * which will be called by do_rfi(), so there is no need to filter |
| * here |
| */ |
| do_rfi(env, env->spr[SPR_SRR0], env->spr[SPR_SRR1]); |
| } |
| |
| void helper_hrfid(CPUPPCState *env) |
| { |
| do_rfi(env, env->spr[SPR_HSRR0], env->spr[SPR_HSRR1]); |
| } |
| #endif |
| |
| /*****************************************************************************/ |
| /* Embedded PowerPC specific helpers */ |
| void helper_40x_rfci(CPUPPCState *env) |
| { |
| do_rfi(env, env->spr[SPR_40x_SRR2], env->spr[SPR_40x_SRR3]); |
| } |
| |
| void helper_rfci(CPUPPCState *env) |
| { |
| do_rfi(env, env->spr[SPR_BOOKE_CSRR0], env->spr[SPR_BOOKE_CSRR1]); |
| } |
| |
| void helper_rfdi(CPUPPCState *env) |
| { |
| /* FIXME: choose CSRR1 or DSRR1 based on cpu type */ |
| do_rfi(env, env->spr[SPR_BOOKE_DSRR0], env->spr[SPR_BOOKE_DSRR1]); |
| } |
| |
| void helper_rfmci(CPUPPCState *env) |
| { |
| /* FIXME: choose CSRR1 or MCSRR1 based on cpu type */ |
| do_rfi(env, env->spr[SPR_BOOKE_MCSRR0], env->spr[SPR_BOOKE_MCSRR1]); |
| } |
| #endif |
| |
| void helper_tw(CPUPPCState *env, target_ulong arg1, target_ulong arg2, |
| uint32_t flags) |
| { |
| if (!likely(!(((int32_t)arg1 < (int32_t)arg2 && (flags & 0x10)) || |
| ((int32_t)arg1 > (int32_t)arg2 && (flags & 0x08)) || |
| ((int32_t)arg1 == (int32_t)arg2 && (flags & 0x04)) || |
| ((uint32_t)arg1 < (uint32_t)arg2 && (flags & 0x02)) || |
| ((uint32_t)arg1 > (uint32_t)arg2 && (flags & 0x01))))) { |
| raise_exception_err_ra(env, POWERPC_EXCP_PROGRAM, |
| POWERPC_EXCP_TRAP, GETPC()); |
| } |
| } |
| |
| #if defined(TARGET_PPC64) |
| void helper_td(CPUPPCState *env, target_ulong arg1, target_ulong arg2, |
| uint32_t flags) |
| { |
| if (!likely(!(((int64_t)arg1 < (int64_t)arg2 && (flags & 0x10)) || |
| ((int64_t)arg1 > (int64_t)arg2 && (flags & 0x08)) || |
| ((int64_t)arg1 == (int64_t)arg2 && (flags & 0x04)) || |
| ((uint64_t)arg1 < (uint64_t)arg2 && (flags & 0x02)) || |
| ((uint64_t)arg1 > (uint64_t)arg2 && (flags & 0x01))))) { |
| raise_exception_err_ra(env, POWERPC_EXCP_PROGRAM, |
| POWERPC_EXCP_TRAP, GETPC()); |
| } |
| } |
| #endif |
| |
| #if !defined(CONFIG_USER_ONLY) |
| /*****************************************************************************/ |
| /* PowerPC 601 specific instructions (POWER bridge) */ |
| |
| void helper_rfsvc(CPUPPCState *env) |
| { |
| do_rfi(env, env->lr, env->ctr & 0x0000FFFF); |
| } |
| |
| /* Embedded.Processor Control */ |
| static int dbell2irq(target_ulong rb) |
| { |
| int msg = rb & DBELL_TYPE_MASK; |
| int irq = -1; |
| |
| switch (msg) { |
| case DBELL_TYPE_DBELL: |
| irq = PPC_INTERRUPT_DOORBELL; |
| break; |
| case DBELL_TYPE_DBELL_CRIT: |
| irq = PPC_INTERRUPT_CDOORBELL; |
| break; |
| case DBELL_TYPE_G_DBELL: |
| case DBELL_TYPE_G_DBELL_CRIT: |
| case DBELL_TYPE_G_DBELL_MC: |
| /* XXX implement */ |
| default: |
| break; |
| } |
| |
| return irq; |
| } |
| |
| void helper_msgclr(CPUPPCState *env, target_ulong rb) |
| { |
| int irq = dbell2irq(rb); |
| |
| if (irq < 0) { |
| return; |
| } |
| |
| env->pending_interrupts &= ~(1 << irq); |
| } |
| |
| void helper_msgsnd(target_ulong rb) |
| { |
| int irq = dbell2irq(rb); |
| int pir = rb & DBELL_PIRTAG_MASK; |
| CPUState *cs; |
| |
| if (irq < 0) { |
| return; |
| } |
| |
| CPU_FOREACH(cs) { |
| PowerPCCPU *cpu = POWERPC_CPU(cs); |
| CPUPPCState *cenv = &cpu->env; |
| |
| if ((rb & DBELL_BRDCAST) || (cenv->spr[SPR_BOOKE_PIR] == pir)) { |
| cenv->pending_interrupts |= 1 << irq; |
| cpu_interrupt(cs, CPU_INTERRUPT_HARD); |
| } |
| } |
| } |
| #endif |
