/* * 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 . */ #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; } goto store_next; 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; } goto store_next; 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]); goto store_next; 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; goto store_next; 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); } goto store_next; case POWERPC_EXCP_ALIGN: /* Alignment exception */ /* XXX: this is false */ /* Get rS/rD and rA from faulting opcode */ env->spr[SPR_DSISR] |= (cpu_ldl_code(env, (env->nip - 4)) & 0x03FF0000) >> 16; goto store_next; 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; } msr |= 0x00100000; if (msr_fe0 == msr_fe1) { goto store_next; } msr |= 0x00010000; 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; } goto store_current; 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); goto store_current; case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ goto store_current; case POWERPC_EXCP_SYSCALL: /* System call exception */ dump_syscall(env); lev = env->error_code; /* "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; } goto store_next; case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */ goto store_current; case POWERPC_EXCP_DECR: /* Decrementer exception */ goto store_next; case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */ /* FIT on 4xx */ LOG_EXCP("FIT exception\n"); goto store_next; 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; } goto store_next; case POWERPC_EXCP_DTLB: /* Data TLB error */ goto store_next; case POWERPC_EXCP_ITLB: /* Instruction TLB error */ goto store_next; 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"); goto store_next; case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavailable */ env->spr[SPR_BOOKE_ESR] = ESR_SPV; goto store_current; 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; goto store_next; 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; goto store_next; case POWERPC_EXCP_EPERFM: /* Embedded performance monitor interrupt */ /* XXX: TODO */ cpu_abort(cs, "Performance counter exception is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */ goto store_next; case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */ srr0 = SPR_BOOKE_CSRR0; srr1 = SPR_BOOKE_CSRR1; goto store_next; case POWERPC_EXCP_RESET: /* System reset exception */ if (msr_pow) { /* indicate that we resumed from power save mode */ msr |= 0x10000; } else { new_msr &= ~((target_ulong)1 << MSR_ME); } new_msr |= (target_ulong)MSR_HVB; ail = 0; goto store_next; case POWERPC_EXCP_DSEG: /* Data segment exception */ goto store_next; case POWERPC_EXCP_ISEG: /* Instruction segment exception */ goto store_next; case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); goto store_next; case POWERPC_EXCP_TRACE: /* Trace exception */ goto store_next; case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); goto store_next; case POWERPC_EXCP_HISI: /* Hypervisor instruction storage exception */ srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); goto store_next; case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); goto store_next; case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment exception */ srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); goto store_next; case POWERPC_EXCP_VPU: /* Vector unavailable exception */ goto store_current; case POWERPC_EXCP_VSXU: /* VSX unavailable exception */ goto store_current; case POWERPC_EXCP_FU: /* Facility unavailable exception */ goto store_current; case POWERPC_EXCP_PIT: /* Programmable interval timer interrupt */ LOG_EXCP("PIT exception\n"); goto store_next; case POWERPC_EXCP_IO: /* IO error exception */ /* XXX: TODO */ cpu_abort(cs, "601 IO error exception is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_RUNM: /* Run mode exception */ /* XXX: TODO */ cpu_abort(cs, "601 run mode exception is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_EMUL: /* Emulation trap exception */ /* XXX: TODO */ cpu_abort(cs, "602 emulation trap exception " "is not implemented yet !\n"); goto store_next; 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; } goto store_next; case POWERPC_EXCP_FPA: /* Floating-point assist exception */ /* XXX: TODO */ cpu_abort(cs, "Floating point assist exception " "is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_DABR: /* Data address breakpoint */ /* XXX: TODO */ cpu_abort(cs, "DABR exception is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ /* XXX: TODO */ cpu_abort(cs, "IABR exception is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_SMI: /* System management interrupt */ /* XXX: TODO */ cpu_abort(cs, "SMI exception is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_THERM: /* Thermal interrupt */ /* XXX: TODO */ cpu_abort(cs, "Thermal management exception " "is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_PERFM: /* Embedded performance monitor interrupt */ /* XXX: TODO */ cpu_abort(cs, "Performance counter exception is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_VPUA: /* Vector assist exception */ /* XXX: TODO */ cpu_abort(cs, "VPU assist exception is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_SOFTP: /* Soft patch exception */ /* XXX: TODO */ cpu_abort(cs, "970 soft-patch exception is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_MAINT: /* Maintenance exception */ /* XXX: TODO */ cpu_abort(cs, "970 maintenance exception is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_MEXTBR: /* Maskable external breakpoint */ /* XXX: TODO */ cpu_abort(cs, "Maskable external exception " "is not implemented yet !\n"); goto store_next; case POWERPC_EXCP_NMEXTBR: /* Non maskable external breakpoint */ /* XXX: TODO */ cpu_abort(cs, "Non maskable external exception " "is not implemented yet !\n"); goto store_next; default: excp_invalid: cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); break; store_current: /* save current instruction location */ env->spr[srr0] = env->nip - 4; break; store_next: /* save next instruction location */ env->spr[srr0] = env->nip; break; } /* 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); } 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 helper_raise_exception_err(CPUPPCState *env, uint32_t exception, uint32_t error_code) { CPUState *cs = CPU(ppc_env_get_cpu(env)); #if 0 printf("Raise exception %3x code : %d\n", exception, error_code); #endif cs->exception_index = exception; env->error_code = error_code; cpu_loop_exit(cs); } void helper_raise_exception(CPUPPCState *env, uint32_t exception) { helper_raise_exception_err(env, exception, 0); } #if !defined(CONFIG_USER_ONLY) void helper_store_msr(CPUPPCState *env, target_ulong val) { CPUState *cs; val = hreg_store_msr(env, val, 0); if (val != 0) { cs = CPU(ppc_env_get_cpu(env)); cs->interrupt_request |= CPU_INTERRUPT_EXITTB; helper_raise_exception(env, val); } } #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); helper_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); } 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))))) { helper_raise_exception_err(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_TRAP); } } #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))))) { helper_raise_exception_err(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_TRAP); } } #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