/* * PowerPC 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #include #include #include #include "cpu.h" #include "exec-all.h" //#define DEBUG_MMU //#define DEBUG_BATS //#define DEBUG_SOFTWARE_TLB //#define DEBUG_EXCEPTIONS //#define FLUSH_ALL_TLBS /*****************************************************************************/ /* PowerPC MMU emulation */ #if defined(CONFIG_USER_ONLY) int cpu_ppc_handle_mmu_fault (CPUState *env, target_ulong address, int rw, int is_user, int is_softmmu) { int exception, error_code; if (rw == 2) { exception = EXCP_ISI; error_code = 0; } else { exception = EXCP_DSI; error_code = 0; if (rw) error_code |= 0x02000000; env->spr[SPR_DAR] = address; env->spr[SPR_DSISR] = error_code; } env->exception_index = exception; env->error_code = error_code; return 1; } target_phys_addr_t cpu_get_phys_page_debug (CPUState *env, target_ulong addr) { return addr; } #else /* Common routines used by software and hardware TLBs emulation */ static inline int pte_is_valid (target_ulong pte0) { return pte0 & 0x80000000 ? 1 : 0; } static inline void pte_invalidate (target_ulong *pte0) { *pte0 &= ~0x80000000; } #define PTE_PTEM_MASK 0x7FFFFFBF #define PTE_CHECK_MASK (TARGET_PAGE_MASK | 0x7B) static int pte_check (mmu_ctx_t *ctx, target_ulong pte0, target_ulong pte1, int h, int rw) { int access, ret; access = 0; ret = -1; /* Check validity and table match */ if (pte_is_valid(pte0) && (h == ((pte0 >> 6) & 1))) { /* Check vsid & api */ if ((pte0 & PTE_PTEM_MASK) == ctx->ptem) { if (ctx->raddr != (target_ulong)-1) { /* all matches should have equal RPN, WIMG & PP */ if ((ctx->raddr & PTE_CHECK_MASK) != (pte1 & PTE_CHECK_MASK)) { if (loglevel > 0) fprintf(logfile, "Bad RPN/WIMG/PP\n"); return -3; } } /* Compute access rights */ if (ctx->key == 0) { access = PAGE_READ; if ((pte1 & 0x00000003) != 0x3) access |= PAGE_WRITE; } else { switch (pte1 & 0x00000003) { case 0x0: access = 0; break; case 0x1: case 0x3: access = PAGE_READ; break; case 0x2: access = PAGE_READ | PAGE_WRITE; break; } } /* Keep the matching PTE informations */ ctx->raddr = pte1; ctx->prot = access; if ((rw == 0 && (access & PAGE_READ)) || (rw == 1 && (access & PAGE_WRITE))) { /* Access granted */ #if defined (DEBUG_MMU) if (loglevel != 0) fprintf(logfile, "PTE access granted !\n"); #endif ret = 0; } else { /* Access right violation */ #if defined (DEBUG_MMU) if (loglevel != 0) fprintf(logfile, "PTE access rejected\n"); #endif ret = -2; } } } return ret; } static int pte_update_flags (mmu_ctx_t *ctx, target_ulong *pte1p, int ret, int rw) { int store = 0; /* Update page flags */ if (!(*pte1p & 0x00000100)) { /* Update accessed flag */ *pte1p |= 0x00000100; store = 1; } if (!(*pte1p & 0x00000080)) { if (rw == 1 && ret == 0) { /* Update changed flag */ *pte1p |= 0x00000080; store = 1; } else { /* Force page fault for first write access */ ctx->prot &= ~PAGE_WRITE; } } return store; } /* Software driven TLB helpers */ static int ppc6xx_tlb_getnum (CPUState *env, target_ulong eaddr, int way, int is_code) { int nr; /* Select TLB num in a way from address */ nr = (eaddr >> TARGET_PAGE_BITS) & (env->tlb_per_way - 1); /* Select TLB way */ nr += env->tlb_per_way * way; /* 6xx have separate TLBs for instructions and data */ if (is_code && env->id_tlbs == 1) nr += env->nb_tlb; return nr; } void ppc6xx_tlb_invalidate_all (CPUState *env) { ppc6xx_tlb_t *tlb; int nr, max; #if defined (DEBUG_SOFTWARE_TLB) && 0 if (loglevel != 0) { fprintf(logfile, "Invalidate all TLBs\n"); } #endif /* Invalidate all defined software TLB */ max = env->nb_tlb; if (env->id_tlbs == 1) max *= 2; for (nr = 0; nr < max; nr++) { tlb = &env->tlb[nr].tlb6; #if !defined(FLUSH_ALL_TLBS) tlb_flush_page(env, tlb->EPN); #endif pte_invalidate(&tlb->pte0); } #if defined(FLUSH_ALL_TLBS) tlb_flush(env, 1); #endif } static inline void __ppc6xx_tlb_invalidate_virt (CPUState *env, target_ulong eaddr, int is_code, int match_epn) { #if !defined(FLUSH_ALL_TLBS) ppc6xx_tlb_t *tlb; int way, nr; /* Invalidate ITLB + DTLB, all ways */ for (way = 0; way < env->nb_ways; way++) { nr = ppc6xx_tlb_getnum(env, eaddr, way, is_code); tlb = &env->tlb[nr].tlb6; if (pte_is_valid(tlb->pte0) && (match_epn == 0 || eaddr == tlb->EPN)) { #if defined (DEBUG_SOFTWARE_TLB) if (loglevel != 0) { fprintf(logfile, "TLB invalidate %d/%d " ADDRX "\n", nr, env->nb_tlb, eaddr); } #endif pte_invalidate(&tlb->pte0); tlb_flush_page(env, tlb->EPN); } } #else /* XXX: PowerPC specification say this is valid as well */ ppc6xx_tlb_invalidate_all(env); #endif } void ppc6xx_tlb_invalidate_virt (CPUState *env, target_ulong eaddr, int is_code) { __ppc6xx_tlb_invalidate_virt(env, eaddr, is_code, 0); } void ppc6xx_tlb_store (CPUState *env, target_ulong EPN, int way, int is_code, target_ulong pte0, target_ulong pte1) { ppc6xx_tlb_t *tlb; int nr; nr = ppc6xx_tlb_getnum(env, EPN, way, is_code); tlb = &env->tlb[nr].tlb6; #if defined (DEBUG_SOFTWARE_TLB) if (loglevel != 0) { fprintf(logfile, "Set TLB %d/%d EPN " ADDRX " PTE0 " ADDRX " PTE1 " ADDRX "\n", nr, env->nb_tlb, EPN, pte0, pte1); } #endif /* Invalidate any pending reference in Qemu for this virtual address */ __ppc6xx_tlb_invalidate_virt(env, EPN, is_code, 1); tlb->pte0 = pte0; tlb->pte1 = pte1; tlb->EPN = EPN; /* Store last way for LRU mechanism */ env->last_way = way; } static int ppc6xx_tlb_check (CPUState *env, mmu_ctx_t *ctx, target_ulong eaddr, int rw, int access_type) { ppc6xx_tlb_t *tlb; int nr, best, way; int ret; best = -1; ret = -1; /* No TLB found */ for (way = 0; way < env->nb_ways; way++) { nr = ppc6xx_tlb_getnum(env, eaddr, way, access_type == ACCESS_CODE ? 1 : 0); tlb = &env->tlb[nr].tlb6; /* This test "emulates" the PTE index match for hardware TLBs */ if ((eaddr & TARGET_PAGE_MASK) != tlb->EPN) { #if defined (DEBUG_SOFTWARE_TLB) if (loglevel != 0) { fprintf(logfile, "TLB %d/%d %s [" ADDRX " " ADDRX "] <> " ADDRX "\n", nr, env->nb_tlb, pte_is_valid(tlb->pte0) ? "valid" : "inval", tlb->EPN, tlb->EPN + TARGET_PAGE_SIZE, eaddr); } #endif continue; } #if defined (DEBUG_SOFTWARE_TLB) if (loglevel != 0) { fprintf(logfile, "TLB %d/%d %s " ADDRX " <> " ADDRX " " ADDRX " %c %c\n", nr, env->nb_tlb, pte_is_valid(tlb->pte0) ? "valid" : "inval", tlb->EPN, eaddr, tlb->pte1, rw ? 'S' : 'L', access_type == ACCESS_CODE ? 'I' : 'D'); } #endif switch (pte_check(ctx, tlb->pte0, tlb->pte1, 0, rw)) { case -3: /* TLB inconsistency */ return -1; case -2: /* Access violation */ ret = -2; best = nr; break; case -1: default: /* No match */ break; case 0: /* access granted */ /* XXX: we should go on looping to check all TLBs consistency * but we can speed-up the whole thing as the * result would be undefined if TLBs are not consistent. */ ret = 0; best = nr; goto done; } } if (best != -1) { done: #if defined (DEBUG_SOFTWARE_TLB) if (loglevel != 0) { fprintf(logfile, "found TLB at addr 0x%08lx prot=0x%01x ret=%d\n", ctx->raddr & TARGET_PAGE_MASK, ctx->prot, ret); } #endif /* Update page flags */ pte_update_flags(ctx, &env->tlb[best].tlb6.pte1, ret, rw); } return ret; } /* Perform BAT hit & translation */ static int get_bat (CPUState *env, mmu_ctx_t *ctx, target_ulong virtual, int rw, int type) { target_ulong *BATlt, *BATut, *BATu, *BATl; target_ulong base, BEPIl, BEPIu, bl; int i; int ret = -1; #if defined (DEBUG_BATS) if (loglevel != 0) { fprintf(logfile, "%s: %cBAT v 0x" ADDRX "\n", __func__, type == ACCESS_CODE ? 'I' : 'D', virtual); } #endif switch (type) { case ACCESS_CODE: BATlt = env->IBAT[1]; BATut = env->IBAT[0]; break; default: BATlt = env->DBAT[1]; BATut = env->DBAT[0]; break; } #if defined (DEBUG_BATS) if (loglevel != 0) { fprintf(logfile, "%s...: %cBAT v 0x" ADDRX "\n", __func__, type == ACCESS_CODE ? 'I' : 'D', virtual); } #endif base = virtual & 0xFFFC0000; for (i = 0; i < 4; i++) { BATu = &BATut[i]; BATl = &BATlt[i]; BEPIu = *BATu & 0xF0000000; BEPIl = *BATu & 0x0FFE0000; bl = (*BATu & 0x00001FFC) << 15; #if defined (DEBUG_BATS) if (loglevel != 0) { fprintf(logfile, "%s: %cBAT%d v 0x" ADDRX " BATu 0x" ADDRX " BATl 0x" ADDRX "\n", __func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual, *BATu, *BATl); } #endif if ((virtual & 0xF0000000) == BEPIu && ((virtual & 0x0FFE0000) & ~bl) == BEPIl) { /* BAT matches */ if ((msr_pr == 0 && (*BATu & 0x00000002)) || (msr_pr == 1 && (*BATu & 0x00000001))) { /* Get physical address */ ctx->raddr = (*BATl & 0xF0000000) | ((virtual & 0x0FFE0000 & bl) | (*BATl & 0x0FFE0000)) | (virtual & 0x0001F000); if (*BATl & 0x00000001) ctx->prot = PAGE_READ; if (*BATl & 0x00000002) ctx->prot = PAGE_WRITE | PAGE_READ; #if defined (DEBUG_BATS) if (loglevel != 0) { fprintf(logfile, "BAT %d match: r 0x" PADDRX " prot=%c%c\n", i, ctx->raddr, ctx->prot & PAGE_READ ? 'R' : '-', ctx->prot & PAGE_WRITE ? 'W' : '-'); } #endif ret = 0; break; } } } if (ret < 0) { #if defined (DEBUG_BATS) if (loglevel != 0) { fprintf(logfile, "no BAT match for 0x" ADDRX ":\n", virtual); for (i = 0; i < 4; i++) { BATu = &BATut[i]; BATl = &BATlt[i]; BEPIu = *BATu & 0xF0000000; BEPIl = *BATu & 0x0FFE0000; bl = (*BATu & 0x00001FFC) << 15; fprintf(logfile, "%s: %cBAT%d v 0x" ADDRX " BATu 0x" ADDRX " BATl 0x" ADDRX " \n\t" "0x" ADDRX " 0x" ADDRX " 0x" ADDRX "\n", __func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual, *BATu, *BATl, BEPIu, BEPIl, bl); } } #endif } /* No hit */ return ret; } /* PTE table lookup */ static int find_pte (mmu_ctx_t *ctx, int h, int rw) { target_ulong base, pte0, pte1; int i, good = -1; int ret; ret = -1; /* No entry found */ base = ctx->pg_addr[h]; for (i = 0; i < 8; i++) { pte0 = ldl_phys(base + (i * 8)); pte1 = ldl_phys(base + (i * 8) + 4); #if defined (DEBUG_MMU) if (loglevel > 0) { fprintf(logfile, "Load pte from 0x" ADDRX " => 0x" ADDRX " 0x" ADDRX " %d %d %d 0x" ADDRX "\n", base + (i * 8), pte0, pte1, pte0 >> 31, h, (pte0 >> 6) & 1, ctx->ptem); } #endif switch (pte_check(ctx, pte0, pte1, h, rw)) { case -3: /* PTE inconsistency */ return -1; case -2: /* Access violation */ ret = -2; good = i; break; case -1: default: /* No PTE match */ break; case 0: /* access granted */ /* XXX: we should go on looping to check all PTEs consistency * but if we can speed-up the whole thing as the * result would be undefined if PTEs are not consistent. */ ret = 0; good = i; goto done; } } if (good != -1) { done: #if defined (DEBUG_MMU) if (loglevel != 0) { fprintf(logfile, "found PTE at addr 0x" PADDRX " prot=0x%01x " "ret=%d\n", ctx->raddr, ctx->prot, ret); } #endif /* Update page flags */ pte1 = ctx->raddr; if (pte_update_flags(ctx, &pte1, ret, rw) == 1) stl_phys_notdirty(base + (good * 8) + 4, pte1); } return ret; } static inline target_phys_addr_t get_pgaddr (target_phys_addr_t sdr1, target_phys_addr_t hash, target_phys_addr_t mask) { return (sdr1 & 0xFFFF0000) | (hash & mask); } /* Perform segment based translation */ static int get_segment (CPUState *env, mmu_ctx_t *ctx, target_ulong eaddr, int rw, int type) { target_phys_addr_t sdr, hash, mask; target_ulong sr, vsid, pgidx; int ret = -1, ret2; sr = env->sr[eaddr >> 28]; #if defined (DEBUG_MMU) if (loglevel > 0) { fprintf(logfile, "Check segment v=0x" ADDRX " %d 0x" ADDRX " nip=0x" ADDRX " lr=0x" ADDRX " ir=%d dr=%d pr=%d %d t=%d\n", eaddr, eaddr >> 28, sr, env->nip, env->lr, msr_ir, msr_dr, msr_pr, rw, type); } #endif ctx->key = (((sr & 0x20000000) && msr_pr == 1) || ((sr & 0x40000000) && msr_pr == 0)) ? 1 : 0; if ((sr & 0x80000000) == 0) { #if defined (DEBUG_MMU) if (loglevel > 0) fprintf(logfile, "pte segment: key=%d n=0x" ADDRX "\n", ctx->key, sr & 0x10000000); #endif /* Check if instruction fetch is allowed, if needed */ if (type != ACCESS_CODE || (sr & 0x10000000) == 0) { /* Page address translation */ pgidx = (eaddr >> TARGET_PAGE_BITS) & 0xFFFF; vsid = sr & 0x00FFFFFF; hash = ((vsid ^ pgidx) & 0x0007FFFF) << 6; /* Primary table address */ sdr = env->sdr1; mask = ((sdr & 0x000001FF) << 16) | 0xFFC0; ctx->pg_addr[0] = get_pgaddr(sdr, hash, mask); /* Secondary table address */ hash = (~hash) & 0x01FFFFC0; ctx->pg_addr[1] = get_pgaddr(sdr, hash, mask); ctx->ptem = (vsid << 7) | (pgidx >> 10); /* Initialize real address with an invalid value */ ctx->raddr = (target_ulong)-1; if (unlikely(PPC_MMU(env) == PPC_FLAGS_MMU_SOFT_6xx)) { /* Software TLB search */ ret = ppc6xx_tlb_check(env, ctx, eaddr, rw, type); } else { #if defined (DEBUG_MMU) if (loglevel != 0) { fprintf(logfile, "0 sdr1=0x" PADDRX " vsid=0x%06x " "api=0x%04x hash=0x%07x pg_addr=0x" PADDRX "\n", sdr, (uint32_t)vsid, (uint32_t)pgidx, (uint32_t)hash, ctx->pg_addr[0]); } #endif /* Primary table lookup */ ret = find_pte(ctx, 0, rw); if (ret < 0) { /* Secondary table lookup */ #if defined (DEBUG_MMU) if (eaddr != 0xEFFFFFFF && loglevel != 0) { fprintf(logfile, "1 sdr1=0x" PADDRX " vsid=0x%06x api=0x%04x " "hash=0x%05x pg_addr=0x" PADDRX "\n", sdr, (uint32_t)vsid, (uint32_t)pgidx, (uint32_t)hash, ctx->pg_addr[1]); } #endif ret2 = find_pte(ctx, 1, rw); if (ret2 != -1) ret = ret2; } } } else { #if defined (DEBUG_MMU) if (loglevel != 0) fprintf(logfile, "No access allowed\n"); #endif ret = -3; } } else { #if defined (DEBUG_MMU) if (loglevel != 0) fprintf(logfile, "direct store...\n"); #endif /* Direct-store segment : absolutely *BUGGY* for now */ switch (type) { case ACCESS_INT: /* Integer load/store : only access allowed */ break; case ACCESS_CODE: /* No code fetch is allowed in direct-store areas */ return -4; case ACCESS_FLOAT: /* Floating point load/store */ return -4; case ACCESS_RES: /* lwarx, ldarx or srwcx. */ return -4; case ACCESS_CACHE: /* dcba, dcbt, dcbtst, dcbf, dcbi, dcbst, dcbz, or icbi */ /* Should make the instruction do no-op. * As it already do no-op, it's quite easy :-) */ ctx->raddr = eaddr; return 0; case ACCESS_EXT: /* eciwx or ecowx */ return -4; default: if (logfile) { fprintf(logfile, "ERROR: instruction should not need " "address translation\n"); } return -4; } if ((rw == 1 || ctx->key != 1) && (rw == 0 || ctx->key != 0)) { ctx->raddr = eaddr; ret = 2; } else { ret = -2; } } return ret; } /* Generic TLB check function for embedded PowerPC implementations */ static int ppcemb_tlb_check (CPUState *env, ppcemb_tlb_t *tlb, target_phys_addr_t *raddrp, target_ulong address, int i) { target_ulong mask; /* Check valid flag */ if (!(tlb->prot & PAGE_VALID)) { if (loglevel != 0) fprintf(logfile, "%s: TLB %d not valid\n", __func__, i); return -1; } mask = ~(tlb->size - 1); if (loglevel != 0) { fprintf(logfile, "%s: TLB %d address " ADDRX " PID %d <=> " ADDRX " " ADDRX " %d\n", __func__, i, address, (int)env->spr[SPR_40x_PID], tlb->EPN, mask, (int)tlb->PID); } /* Check PID */ if (tlb->PID != 0 && tlb->PID != env->spr[SPR_40x_PID]) return -1; /* Check effective address */ if ((address & mask) != tlb->EPN) return -1; *raddrp = (tlb->RPN & mask) | (address & ~mask); return 0; } /* Generic TLB search function for PowerPC embedded implementations */ int ppcemb_tlb_search (CPUState *env, target_ulong address) { ppcemb_tlb_t *tlb; target_phys_addr_t raddr; int i, ret; /* Default return value is no match */ ret = -1; for (i = 0; i < 64; i++) { tlb = &env->tlb[i].tlbe; if (ppcemb_tlb_check(env, tlb, &raddr, address, i) == 0) { ret = i; break; } } return ret; } /* Helpers specific to PowerPC 40x implementations */ void ppc4xx_tlb_invalidate_all (CPUState *env) { ppcemb_tlb_t *tlb; int i; for (i = 0; i < env->nb_tlb; i++) { tlb = &env->tlb[i].tlbe; if (tlb->prot & PAGE_VALID) { #if 0 // XXX: TLB have variable sizes then we flush all Qemu TLB. end = tlb->EPN + tlb->size; for (page = tlb->EPN; page < end; page += TARGET_PAGE_SIZE) tlb_flush_page(env, page); #endif tlb->prot &= ~PAGE_VALID; } } tlb_flush(env, 1); } int mmu4xx_get_physical_address (CPUState *env, mmu_ctx_t *ctx, target_ulong address, int rw, int access_type) { ppcemb_tlb_t *tlb; target_phys_addr_t raddr; int i, ret, zsel, zpr; ret = -1; raddr = -1; for (i = 0; i < env->nb_tlb; i++) { tlb = &env->tlb[i].tlbe; if (ppcemb_tlb_check(env, tlb, &raddr, address, i) < 0) continue; zsel = (tlb->attr >> 4) & 0xF; zpr = (env->spr[SPR_40x_ZPR] >> (28 - (2 * zsel))) & 0x3; if (loglevel != 0) { fprintf(logfile, "%s: TLB %d zsel %d zpr %d rw %d attr %08x\n", __func__, i, zsel, zpr, rw, tlb->attr); } if (access_type == ACCESS_CODE) { /* Check execute enable bit */ switch (zpr) { case 0x2: if (msr_pr) goto check_exec_perm; goto exec_granted; case 0x0: if (msr_pr) { ctx->prot = 0; ret = -3; break; } /* No break here */ case 0x1: check_exec_perm: /* Check from TLB entry */ if (!(tlb->prot & PAGE_EXEC)) { ret = -3; } else { if (tlb->prot & PAGE_WRITE) { ctx->prot = PAGE_READ | PAGE_WRITE; } else { ctx->prot = PAGE_READ; } ret = 0; } break; case 0x3: exec_granted: /* All accesses granted */ ctx->prot = PAGE_READ | PAGE_WRITE; ret = 0; break; } } else { switch (zpr) { case 0x2: if (msr_pr) goto check_rw_perm; goto rw_granted; case 0x0: if (msr_pr) { ctx->prot = 0; ret = -2; break; } /* No break here */ case 0x1: check_rw_perm: /* Check from TLB entry */ /* Check write protection bit */ if (tlb->prot & PAGE_WRITE) { ctx->prot = PAGE_READ | PAGE_WRITE; ret = 0; } else { ctx->prot = PAGE_READ; if (rw) ret = -2; else ret = 0; } break; case 0x3: rw_granted: /* All accesses granted */ ctx->prot = PAGE_READ | PAGE_WRITE; ret = 0; break; } } if (ret >= 0) { ctx->raddr = raddr; if (loglevel != 0) { fprintf(logfile, "%s: access granted " ADDRX " => " REGX " %d %d\n", __func__, address, ctx->raddr, ctx->prot, ret); } return 0; } } if (loglevel != 0) { fprintf(logfile, "%s: access refused " ADDRX " => " REGX " %d %d\n", __func__, address, raddr, ctx->prot, ret); } return ret; } void store_40x_sler (CPUPPCState *env, uint32_t val) { /* XXX: TO BE FIXED */ if (val != 0x00000000) { cpu_abort(env, "Little-endian regions are not supported by now\n"); } env->spr[SPR_405_SLER] = val; } static int check_physical (CPUState *env, mmu_ctx_t *ctx, target_ulong eaddr, int rw) { int in_plb, ret; ctx->raddr = eaddr; ctx->prot = PAGE_READ; ret = 0; if (unlikely(msr_pe != 0 && PPC_MMU(env) == PPC_FLAGS_MMU_403)) { /* 403 family add some particular protections, * using PBL/PBU registers for accesses with no translation. */ in_plb = /* Check PLB validity */ (env->pb[0] < env->pb[1] && /* and address in plb area */ eaddr >= env->pb[0] && eaddr < env->pb[1]) || (env->pb[2] < env->pb[3] && eaddr >= env->pb[2] && eaddr < env->pb[3]) ? 1 : 0; if (in_plb ^ msr_px) { /* Access in protected area */ if (rw == 1) { /* Access is not allowed */ ret = -2; } } else { /* Read-write access is allowed */ ctx->prot |= PAGE_WRITE; } } else { ctx->prot |= PAGE_WRITE; } return ret; } int get_physical_address (CPUState *env, mmu_ctx_t *ctx, target_ulong eaddr, int rw, int access_type, int check_BATs) { int ret; #if 0 if (loglevel != 0) { fprintf(logfile, "%s\n", __func__); } #endif if ((access_type == ACCESS_CODE && msr_ir == 0) || (access_type != ACCESS_CODE && msr_dr == 0)) { /* No address translation */ ret = check_physical(env, ctx, eaddr, rw); } else { ret = -1; switch (PPC_MMU(env)) { case PPC_FLAGS_MMU_32B: case PPC_FLAGS_MMU_SOFT_6xx: /* Try to find a BAT */ if (check_BATs) ret = get_bat(env, ctx, eaddr, rw, access_type); /* No break here */ #if defined(TARGET_PPC64) case PPC_FLAGS_MMU_64B: case PPC_FLAGS_MMU_64BRIDGE: #endif if (ret < 0) { /* We didn't match any BAT entry or don't have BATs */ ret = get_segment(env, ctx, eaddr, rw, access_type); } break; case PPC_FLAGS_MMU_SOFT_4xx: case PPC_FLAGS_MMU_403: ret = mmu4xx_get_physical_address(env, ctx, eaddr, rw, access_type); break; case PPC_FLAGS_MMU_601: /* XXX: TODO */ cpu_abort(env, "601 MMU model not implemented\n"); return -1; case PPC_FLAGS_MMU_BOOKE: /* XXX: TODO */ cpu_abort(env, "BookeE MMU model not implemented\n"); return -1; case PPC_FLAGS_MMU_BOOKE_FSL: /* XXX: TODO */ cpu_abort(env, "BookE FSL MMU model not implemented\n"); return -1; default: cpu_abort(env, "Unknown or invalid MMU model\n"); return -1; } } #if 0 if (loglevel != 0) { fprintf(logfile, "%s address " ADDRX " => %d " PADDRX "\n", __func__, eaddr, ret, ctx->raddr); } #endif return ret; } target_phys_addr_t cpu_get_phys_page_debug (CPUState *env, target_ulong addr) { mmu_ctx_t ctx; if (unlikely(get_physical_address(env, &ctx, addr, 0, ACCESS_INT, 1) != 0)) return -1; return ctx.raddr & TARGET_PAGE_MASK; } /* Perform address translation */ int cpu_ppc_handle_mmu_fault (CPUState *env, target_ulong address, int rw, int is_user, int is_softmmu) { mmu_ctx_t ctx; int exception = 0, error_code = 0; int access_type; int ret = 0; if (rw == 2) { /* code access */ rw = 0; access_type = ACCESS_CODE; } else { /* data access */ /* XXX: put correct access by using cpu_restore_state() correctly */ access_type = ACCESS_INT; // access_type = env->access_type; } ret = get_physical_address(env, &ctx, address, rw, access_type, 1); if (ret == 0) { ret = tlb_set_page(env, address & TARGET_PAGE_MASK, ctx.raddr & TARGET_PAGE_MASK, ctx.prot, is_user, is_softmmu); } else if (ret < 0) { #if defined (DEBUG_MMU) if (loglevel != 0) cpu_dump_state(env, logfile, fprintf, 0); #endif if (access_type == ACCESS_CODE) { exception = EXCP_ISI; switch (ret) { case -1: /* No matches in page tables or TLB */ switch (PPC_MMU(env)) { case PPC_FLAGS_MMU_SOFT_6xx: exception = EXCP_I_TLBMISS; env->spr[SPR_IMISS] = address; env->spr[SPR_ICMP] = 0x80000000 | ctx.ptem; error_code = 1 << 18; goto tlb_miss; case PPC_FLAGS_MMU_SOFT_4xx: case PPC_FLAGS_MMU_403: exception = EXCP_40x_ITLBMISS; error_code = 0; env->spr[SPR_40x_DEAR] = address; env->spr[SPR_40x_ESR] = 0x00000000; break; case PPC_FLAGS_MMU_32B: error_code = 0x40000000; break; #if defined(TARGET_PPC64) case PPC_FLAGS_MMU_64B: /* XXX: TODO */ cpu_abort(env, "MMU model not implemented\n"); return -1; case PPC_FLAGS_MMU_64BRIDGE: /* XXX: TODO */ cpu_abort(env, "MMU model not implemented\n"); return -1; #endif case PPC_FLAGS_MMU_601: /* XXX: TODO */ cpu_abort(env, "MMU model not implemented\n"); return -1; case PPC_FLAGS_MMU_BOOKE: /* XXX: TODO */ cpu_abort(env, "MMU model not implemented\n"); return -1; case PPC_FLAGS_MMU_BOOKE_FSL: /* XXX: TODO */ cpu_abort(env, "MMU model not implemented\n"); return -1; default: cpu_abort(env, "Unknown or invalid MMU model\n"); return -1; } break; case -2: /* Access rights violation */ error_code = 0x08000000; break; case -3: /* No execute protection violation */ error_code = 0x10000000; break; case -4: /* Direct store exception */ /* No code fetch is allowed in direct-store areas */ error_code = 0x10000000; break; case -5: /* No match in segment table */ exception = EXCP_ISEG; error_code = 0; break; } } else { exception = EXCP_DSI; switch (ret) { case -1: /* No matches in page tables or TLB */ switch (PPC_MMU(env)) { case PPC_FLAGS_MMU_SOFT_6xx: if (rw == 1) { exception = EXCP_DS_TLBMISS; error_code = 1 << 16; } else { exception = EXCP_DL_TLBMISS; error_code = 0; } env->spr[SPR_DMISS] = address; env->spr[SPR_DCMP] = 0x80000000 | ctx.ptem; tlb_miss: error_code |= ctx.key << 19; env->spr[SPR_HASH1] = ctx.pg_addr[0]; env->spr[SPR_HASH2] = ctx.pg_addr[1]; /* Do not alter DAR nor DSISR */ goto out; case PPC_FLAGS_MMU_SOFT_4xx: case PPC_FLAGS_MMU_403: exception = EXCP_40x_DTLBMISS; error_code = 0; env->spr[SPR_40x_DEAR] = address; if (rw) env->spr[SPR_40x_ESR] = 0x00800000; else env->spr[SPR_40x_ESR] = 0x00000000; break; case PPC_FLAGS_MMU_32B: error_code = 0x40000000; break; #if defined(TARGET_PPC64) case PPC_FLAGS_MMU_64B: /* XXX: TODO */ cpu_abort(env, "MMU model not implemented\n"); return -1; case PPC_FLAGS_MMU_64BRIDGE: /* XXX: TODO */ cpu_abort(env, "MMU model not implemented\n"); return -1; #endif case PPC_FLAGS_MMU_601: /* XXX: TODO */ cpu_abort(env, "MMU model not implemented\n"); return -1; case PPC_FLAGS_MMU_BOOKE: /* XXX: TODO */ cpu_abort(env, "MMU model not implemented\n"); return -1; case PPC_FLAGS_MMU_BOOKE_FSL: /* XXX: TODO */ cpu_abort(env, "MMU model not implemented\n"); return -1; default: cpu_abort(env, "Unknown or invalid MMU model\n"); return -1; } break; case -2: /* Access rights violation */ error_code = 0x08000000; break; case -4: /* Direct store exception */ switch (access_type) { case ACCESS_FLOAT: /* Floating point load/store */ exception = EXCP_ALIGN; error_code = EXCP_ALIGN_FP; break; case ACCESS_RES: /* lwarx, ldarx or srwcx. */ error_code = 0x04000000; break; case ACCESS_EXT: /* eciwx or ecowx */ error_code = 0x04100000; break; default: printf("DSI: invalid exception (%d)\n", ret); exception = EXCP_PROGRAM; error_code = EXCP_INVAL | EXCP_INVAL_INVAL; break; } break; case -5: /* No match in segment table */ exception = EXCP_DSEG; error_code = 0; break; } if (exception == EXCP_DSI && rw == 1) error_code |= 0x02000000; /* Store fault address */ env->spr[SPR_DAR] = address; env->spr[SPR_DSISR] = error_code; } out: #if 0 printf("%s: set exception to %d %02x\n", __func__, exception, error_code); #endif env->exception_index = exception; env->error_code = error_code; ret = 1; } return ret; } /*****************************************************************************/ /* BATs management */ #if !defined(FLUSH_ALL_TLBS) static inline void do_invalidate_BAT (CPUPPCState *env, target_ulong BATu, target_ulong mask) { target_ulong base, end, page; base = BATu & ~0x0001FFFF; end = base + mask + 0x00020000; #if defined (DEBUG_BATS) if (loglevel != 0) { fprintf(logfile, "Flush BAT from " ADDRX " to " ADDRX " (" ADDRX ")\n", base, end, mask); } #endif for (page = base; page != end; page += TARGET_PAGE_SIZE) tlb_flush_page(env, page); #if defined (DEBUG_BATS) if (loglevel != 0) fprintf(logfile, "Flush done\n"); #endif } #endif static inline void dump_store_bat (CPUPPCState *env, char ID, int ul, int nr, target_ulong value) { #if defined (DEBUG_BATS) if (loglevel != 0) { fprintf(logfile, "Set %cBAT%d%c to 0x" ADDRX " (0x" ADDRX ")\n", ID, nr, ul == 0 ? 'u' : 'l', value, env->nip); } #endif } target_ulong do_load_ibatu (CPUPPCState *env, int nr) { return env->IBAT[0][nr]; } target_ulong do_load_ibatl (CPUPPCState *env, int nr) { return env->IBAT[1][nr]; } void do_store_ibatu (CPUPPCState *env, int nr, target_ulong value) { target_ulong mask; dump_store_bat(env, 'I', 0, nr, value); if (env->IBAT[0][nr] != value) { mask = (value << 15) & 0x0FFE0000UL; #if !defined(FLUSH_ALL_TLBS) do_invalidate_BAT(env, env->IBAT[0][nr], mask); #endif /* When storing valid upper BAT, mask BEPI and BRPN * and invalidate all TLBs covered by this BAT */ mask = (value << 15) & 0x0FFE0000UL; env->IBAT[0][nr] = (value & 0x00001FFFUL) | (value & ~0x0001FFFFUL & ~mask); env->IBAT[1][nr] = (env->IBAT[1][nr] & 0x0000007B) | (env->IBAT[1][nr] & ~0x0001FFFF & ~mask); #if !defined(FLUSH_ALL_TLBS) do_invalidate_BAT(env, env->IBAT[0][nr], mask); #else tlb_flush(env, 1); #endif } } void do_store_ibatl (CPUPPCState *env, int nr, target_ulong value) { dump_store_bat(env, 'I', 1, nr, value); env->IBAT[1][nr] = value; } target_ulong do_load_dbatu (CPUPPCState *env, int nr) { return env->DBAT[0][nr]; } target_ulong do_load_dbatl (CPUPPCState *env, int nr) { return env->DBAT[1][nr]; } void do_store_dbatu (CPUPPCState *env, int nr, target_ulong value) { target_ulong mask; dump_store_bat(env, 'D', 0, nr, value); if (env->DBAT[0][nr] != value) { /* When storing valid upper BAT, mask BEPI and BRPN * and invalidate all TLBs covered by this BAT */ mask = (value << 15) & 0x0FFE0000UL; #if !defined(FLUSH_ALL_TLBS) do_invalidate_BAT(env, env->DBAT[0][nr], mask); #endif mask = (value << 15) & 0x0FFE0000UL; env->DBAT[0][nr] = (value & 0x00001FFFUL) | (value & ~0x0001FFFFUL & ~mask); env->DBAT[1][nr] = (env->DBAT[1][nr] & 0x0000007B) | (env->DBAT[1][nr] & ~0x0001FFFF & ~mask); #if !defined(FLUSH_ALL_TLBS) do_invalidate_BAT(env, env->DBAT[0][nr], mask); #else tlb_flush(env, 1); #endif } } void do_store_dbatl (CPUPPCState *env, int nr, target_ulong value) { dump_store_bat(env, 'D', 1, nr, value); env->DBAT[1][nr] = value; } /*****************************************************************************/ /* TLB management */ void ppc_tlb_invalidate_all (CPUPPCState *env) { if (unlikely(PPC_MMU(env) == PPC_FLAGS_MMU_SOFT_6xx)) { ppc6xx_tlb_invalidate_all(env); } else if (unlikely(PPC_MMU(env) == PPC_FLAGS_MMU_SOFT_4xx)) { ppc4xx_tlb_invalidate_all(env); } else { tlb_flush(env, 1); } } /*****************************************************************************/ /* Special registers manipulation */ #if defined(TARGET_PPC64) target_ulong ppc_load_asr (CPUPPCState *env) { return env->asr; } void ppc_store_asr (CPUPPCState *env, target_ulong value) { if (env->asr != value) { env->asr = value; tlb_flush(env, 1); } } #endif target_ulong do_load_sdr1 (CPUPPCState *env) { return env->sdr1; } void do_store_sdr1 (CPUPPCState *env, target_ulong value) { #if defined (DEBUG_MMU) if (loglevel != 0) { fprintf(logfile, "%s: 0x" ADDRX "\n", __func__, value); } #endif if (env->sdr1 != value) { env->sdr1 = value; tlb_flush(env, 1); } } target_ulong do_load_sr (CPUPPCState *env, int srnum) { return env->sr[srnum]; } void do_store_sr (CPUPPCState *env, int srnum, target_ulong value) { #if defined (DEBUG_MMU) if (loglevel != 0) { fprintf(logfile, "%s: reg=%d 0x" ADDRX " " ADDRX "\n", __func__, srnum, value, env->sr[srnum]); } #endif if (env->sr[srnum] != value) { env->sr[srnum] = value; #if !defined(FLUSH_ALL_TLBS) && 0 { target_ulong page, end; /* Invalidate 256 MB of virtual memory */ page = (16 << 20) * srnum; end = page + (16 << 20); for (; page != end; page += TARGET_PAGE_SIZE) tlb_flush_page(env, page); } #else tlb_flush(env, 1); #endif } } #endif /* !defined (CONFIG_USER_ONLY) */ uint32_t ppc_load_xer (CPUPPCState *env) { return (xer_so << XER_SO) | (xer_ov << XER_OV) | (xer_ca << XER_CA) | (xer_bc << XER_BC) | (xer_cmp << XER_CMP); } void ppc_store_xer (CPUPPCState *env, uint32_t value) { xer_so = (value >> XER_SO) & 0x01; xer_ov = (value >> XER_OV) & 0x01; xer_ca = (value >> XER_CA) & 0x01; xer_cmp = (value >> XER_CMP) & 0xFF; xer_bc = (value >> XER_BC) & 0x7F; } /* Swap temporary saved registers with GPRs */ static inline void swap_gpr_tgpr (CPUPPCState *env) { ppc_gpr_t tmp; tmp = env->gpr[0]; env->gpr[0] = env->tgpr[0]; env->tgpr[0] = tmp; tmp = env->gpr[1]; env->gpr[1] = env->tgpr[1]; env->tgpr[1] = tmp; tmp = env->gpr[2]; env->gpr[2] = env->tgpr[2]; env->tgpr[2] = tmp; tmp = env->gpr[3]; env->gpr[3] = env->tgpr[3]; env->tgpr[3] = tmp; } /* GDBstub can read and write MSR... */ target_ulong do_load_msr (CPUPPCState *env) { return #if defined (TARGET_PPC64) ((target_ulong)msr_sf << MSR_SF) | ((target_ulong)msr_isf << MSR_ISF) | ((target_ulong)msr_hv << MSR_HV) | #endif ((target_ulong)msr_ucle << MSR_UCLE) | ((target_ulong)msr_vr << MSR_VR) | /* VR / SPE */ ((target_ulong)msr_ap << MSR_AP) | ((target_ulong)msr_sa << MSR_SA) | ((target_ulong)msr_key << MSR_KEY) | ((target_ulong)msr_pow << MSR_POW) | /* POW / WE */ ((target_ulong)msr_tlb << MSR_TLB) | /* TLB / TGPE / CE */ ((target_ulong)msr_ile << MSR_ILE) | ((target_ulong)msr_ee << MSR_EE) | ((target_ulong)msr_pr << MSR_PR) | ((target_ulong)msr_fp << MSR_FP) | ((target_ulong)msr_me << MSR_ME) | ((target_ulong)msr_fe0 << MSR_FE0) | ((target_ulong)msr_se << MSR_SE) | /* SE / DWE / UBLE */ ((target_ulong)msr_be << MSR_BE) | /* BE / DE */ ((target_ulong)msr_fe1 << MSR_FE1) | ((target_ulong)msr_al << MSR_AL) | ((target_ulong)msr_ip << MSR_IP) | ((target_ulong)msr_ir << MSR_IR) | /* IR / IS */ ((target_ulong)msr_dr << MSR_DR) | /* DR / DS */ ((target_ulong)msr_pe << MSR_PE) | /* PE / EP */ ((target_ulong)msr_px << MSR_PX) | /* PX / PMM */ ((target_ulong)msr_ri << MSR_RI) | ((target_ulong)msr_le << MSR_LE); } void do_store_msr (CPUPPCState *env, target_ulong value) { int enter_pm; value &= env->msr_mask; if (((value >> MSR_IR) & 1) != msr_ir || ((value >> MSR_DR) & 1) != msr_dr) { /* Flush all tlb when changing translation mode */ tlb_flush(env, 1); env->interrupt_request |= CPU_INTERRUPT_EXITTB; } #if 0 if (loglevel != 0) { fprintf(logfile, "%s: T0 %08lx\n", __func__, value); } #endif switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_602: case PPC_FLAGS_EXCP_603: if (((value >> MSR_TGPR) & 1) != msr_tgpr) { /* Swap temporary saved registers with GPRs */ swap_gpr_tgpr(env); } break; default: break; } #if defined (TARGET_PPC64) msr_sf = (value >> MSR_SF) & 1; msr_isf = (value >> MSR_ISF) & 1; msr_hv = (value >> MSR_HV) & 1; #endif msr_ucle = (value >> MSR_UCLE) & 1; msr_vr = (value >> MSR_VR) & 1; /* VR / SPE */ msr_ap = (value >> MSR_AP) & 1; msr_sa = (value >> MSR_SA) & 1; msr_key = (value >> MSR_KEY) & 1; msr_pow = (value >> MSR_POW) & 1; /* POW / WE */ msr_tlb = (value >> MSR_TLB) & 1; /* TLB / TGPR / CE */ msr_ile = (value >> MSR_ILE) & 1; msr_ee = (value >> MSR_EE) & 1; msr_pr = (value >> MSR_PR) & 1; msr_fp = (value >> MSR_FP) & 1; msr_me = (value >> MSR_ME) & 1; msr_fe0 = (value >> MSR_FE0) & 1; msr_se = (value >> MSR_SE) & 1; /* SE / DWE / UBLE */ msr_be = (value >> MSR_BE) & 1; /* BE / DE */ msr_fe1 = (value >> MSR_FE1) & 1; msr_al = (value >> MSR_AL) & 1; msr_ip = (value >> MSR_IP) & 1; msr_ir = (value >> MSR_IR) & 1; /* IR / IS */ msr_dr = (value >> MSR_DR) & 1; /* DR / DS */ msr_pe = (value >> MSR_PE) & 1; /* PE / EP */ msr_px = (value >> MSR_PX) & 1; /* PX / PMM */ msr_ri = (value >> MSR_RI) & 1; msr_le = (value >> MSR_LE) & 1; do_compute_hflags(env); enter_pm = 0; switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_603: /* Don't handle SLEEP mode: we should disable all clocks... * No dynamic power-management. */ if (msr_pow == 1 && (env->spr[SPR_HID0] & 0x00C00000) != 0) enter_pm = 1; break; case PPC_FLAGS_EXCP_604: if (msr_pow == 1) enter_pm = 1; break; case PPC_FLAGS_EXCP_7x0: if (msr_pow == 1 && (env->spr[SPR_HID0] & 0x00E00000) != 0) enter_pm = 1; break; default: break; } if (enter_pm) { if (likely(!env->halted)) { /* power save: exit cpu loop */ env->halted = 1; env->exception_index = EXCP_HLT; cpu_loop_exit(); } } } #if defined(TARGET_PPC64) void ppc_store_msr_32 (CPUPPCState *env, uint32_t value) { do_store_msr(env, (do_load_msr(env) & ~0xFFFFFFFFULL) | (value & 0xFFFFFFFF)); } #endif void do_compute_hflags (CPUPPCState *env) { /* Compute current hflags */ env->hflags = (msr_cm << MSR_CM) | (msr_vr << MSR_VR) | (msr_ap << MSR_AP) | (msr_sa << MSR_SA) | (msr_pr << MSR_PR) | (msr_fp << MSR_FP) | (msr_fe0 << MSR_FE0) | (msr_se << MSR_SE) | (msr_be << MSR_BE) | (msr_fe1 << MSR_FE1) | (msr_le << MSR_LE); #if defined (TARGET_PPC64) /* No care here: PowerPC 64 MSR_SF means the same as MSR_CM for BookE */ env->hflags |= (msr_sf << (MSR_SF - 32)) | (msr_hv << (MSR_HV - 32)); #endif } /*****************************************************************************/ /* Exception processing */ #if defined (CONFIG_USER_ONLY) void do_interrupt (CPUState *env) { env->exception_index = -1; } void ppc_hw_interrupt (CPUState *env) { env->exception_index = -1; } #else /* defined (CONFIG_USER_ONLY) */ static void dump_syscall(CPUState *env) { fprintf(logfile, "syscall r0=0x" REGX " r3=0x" REGX " r4=0x" REGX " r5=0x" REGX " r6=0x" REGX " nip=0x" ADDRX "\n", env->gpr[0], env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6], env->nip); } void do_interrupt (CPUState *env) { target_ulong msr, *srr_0, *srr_1, *asrr_0, *asrr_1; int excp, idx; excp = env->exception_index; msr = do_load_msr(env); /* The default is to use SRR0 & SRR1 to save the exception context */ srr_0 = &env->spr[SPR_SRR0]; srr_1 = &env->spr[SPR_SRR1]; asrr_0 = NULL; asrr_1 = NULL; #if defined (DEBUG_EXCEPTIONS) if ((excp == EXCP_PROGRAM || excp == EXCP_DSI) && msr_pr == 1) { if (loglevel != 0) { fprintf(logfile, "Raise exception at 0x" ADDRX " => 0x%08x (%02x)\n", env->nip, excp, env->error_code); cpu_dump_state(env, logfile, fprintf, 0); } } #endif if (loglevel & CPU_LOG_INT) { fprintf(logfile, "Raise exception at 0x" ADDRX " => 0x%08x (%02x)\n", env->nip, excp, env->error_code); } msr_pow = 0; idx = -1; /* Generate informations in save/restore registers */ switch (excp) { /* Generic PowerPC exceptions */ case EXCP_RESET: /* 0x0100 */ switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_40x: srr_0 = &env->spr[SPR_40x_SRR2]; srr_1 = &env->spr[SPR_40x_SRR3]; break; case PPC_FLAGS_EXCP_BOOKE: idx = 0; srr_0 = &env->spr[SPR_BOOKE_CSRR0]; srr_1 = &env->spr[SPR_BOOKE_CSRR1]; break; default: if (msr_ip) excp += 0xFFC00; excp |= 0xFFC00000; break; } goto store_next; case EXCP_MACHINE_CHECK: /* 0x0200 */ switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_40x: srr_0 = &env->spr[SPR_40x_SRR2]; srr_1 = &env->spr[SPR_40x_SRR3]; break; case PPC_FLAGS_EXCP_BOOKE: idx = 1; srr_0 = &env->spr[SPR_BOOKE_MCSRR0]; srr_1 = &env->spr[SPR_BOOKE_MCSRR1]; asrr_0 = &env->spr[SPR_BOOKE_CSRR0]; asrr_1 = &env->spr[SPR_BOOKE_CSRR1]; msr_ce = 0; break; default: break; } msr_me = 0; break; case EXCP_DSI: /* 0x0300 */ /* Store exception cause */ /* data location address has been stored * when the fault has been detected */ idx = 2; msr &= ~0xFFFF0000; #if defined (DEBUG_EXCEPTIONS) if (loglevel != 0) { fprintf(logfile, "DSI exception: DSISR=0x" ADDRX" DAR=0x" ADDRX "\n", env->spr[SPR_DSISR], env->spr[SPR_DAR]); } #endif goto store_next; case EXCP_ISI: /* 0x0400 */ /* Store exception cause */ idx = 3; msr &= ~0xFFFF0000; msr |= env->error_code; #if defined (DEBUG_EXCEPTIONS) if (loglevel != 0) { fprintf(logfile, "ISI exception: msr=0x" ADDRX ", nip=0x" ADDRX "\n", msr, env->nip); } #endif goto store_next; case EXCP_EXTERNAL: /* 0x0500 */ idx = 4; goto store_next; case EXCP_ALIGN: /* 0x0600 */ if (likely(PPC_EXCP(env) != PPC_FLAGS_EXCP_601)) { /* Store exception cause */ idx = 5; /* Get rS/rD and rA from faulting opcode */ env->spr[SPR_DSISR] |= (ldl_code((env->nip - 4)) & 0x03FF0000) >> 16; /* data location address has been stored * when the fault has been detected */ } else { /* IO error exception on PowerPC 601 */ /* XXX: TODO */ cpu_abort(env, "601 IO error exception is not implemented yet !\n"); } goto store_current; case EXCP_PROGRAM: /* 0x0700 */ idx = 6; msr &= ~0xFFFF0000; switch (env->error_code & ~0xF) { case EXCP_FP: if (msr_fe0 == 0 && msr_fe1 == 0) { #if defined (DEBUG_EXCEPTIONS) if (loglevel != 0) { fprintf(logfile, "Ignore floating point exception\n"); } #endif return; } msr |= 0x00100000; /* Set FX */ env->fpscr[7] |= 0x8; /* Finally, update FEX */ if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) & ((env->fpscr[1] << 1) | (env->fpscr[0] >> 3))) env->fpscr[7] |= 0x4; break; case EXCP_INVAL: #if defined (DEBUG_EXCEPTIONS) if (loglevel != 0) { fprintf(logfile, "Invalid instruction at 0x" ADDRX "\n", env->nip); } #endif msr |= 0x00080000; break; case EXCP_PRIV: msr |= 0x00040000; break; case EXCP_TRAP: idx = 15; msr |= 0x00020000; break; default: /* Should never occur */ break; } msr |= 0x00010000; goto store_current; case EXCP_NO_FP: /* 0x0800 */ idx = 7; msr &= ~0xFFFF0000; goto store_current; case EXCP_DECR: goto store_next; case EXCP_SYSCALL: /* 0x0C00 */ idx = 8; /* NOTE: this is a temporary hack to support graphics OSI calls from the MOL driver */ if (env->gpr[3] == 0x113724fa && env->gpr[4] == 0x77810f9b && env->osi_call) { if (env->osi_call(env) != 0) return; } if (loglevel & CPU_LOG_INT) { dump_syscall(env); } goto store_next; case EXCP_TRACE: /* 0x0D00 */ goto store_next; case EXCP_PERF: /* 0x0F00 */ /* XXX: TODO */ cpu_abort(env, "Performance counter exception is not implemented yet !\n"); goto store_next; /* 32 bits PowerPC specific exceptions */ case EXCP_FP_ASSIST: /* 0x0E00 */ /* XXX: TODO */ cpu_abort(env, "Floating point assist exception " "is not implemented yet !\n"); goto store_next; /* 64 bits PowerPC exceptions */ case EXCP_DSEG: /* 0x0380 */ /* XXX: TODO */ cpu_abort(env, "Data segment exception is not implemented yet !\n"); goto store_next; case EXCP_ISEG: /* 0x0480 */ /* XXX: TODO */ cpu_abort(env, "Instruction segment exception is not implemented yet !\n"); goto store_next; case EXCP_HDECR: /* 0x0980 */ /* XXX: TODO */ cpu_abort(env, "Hypervisor decrementer exception is not implemented " "yet !\n"); goto store_next; /* Implementation specific exceptions */ case 0x0A00: if (likely(env->spr[SPR_PVR] == CPU_PPC_G2 || env->spr[SPR_PVR] == CPU_PPC_G2LE)) { /* Critical interrupt on G2 */ /* XXX: TODO */ cpu_abort(env, "G2 critical interrupt is not implemented yet !\n"); goto store_next; } else { cpu_abort(env, "Invalid exception 0x0A00 !\n"); } return; case 0x0F20: idx = 9; switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_40x: /* APU unavailable on 405 */ /* XXX: TODO */ cpu_abort(env, "APU unavailable exception is not implemented yet !\n"); goto store_next; case PPC_FLAGS_EXCP_74xx: /* Altivec unavailable */ /* XXX: TODO */ cpu_abort(env, "Altivec unavailable exception " "is not implemented yet !\n"); goto store_next; default: cpu_abort(env, "Invalid exception 0x0F20 !\n"); break; } return; case 0x1000: idx = 10; switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_40x: /* PIT on 4xx */ msr &= ~0xFFFF0000; #if defined (DEBUG_EXCEPTIONS) if (loglevel != 0) fprintf(logfile, "PIT exception\n"); #endif goto store_next; case PPC_FLAGS_EXCP_602: case PPC_FLAGS_EXCP_603: /* ITLBMISS on 602/603 */ goto store_gprs; case PPC_FLAGS_EXCP_7x5: /* ITLBMISS on 745/755 */ goto tlb_miss; default: cpu_abort(env, "Invalid exception 0x1000 !\n"); break; } return; case 0x1010: idx = 11; switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_40x: /* FIT on 4xx */ msr &= ~0xFFFF0000; #if defined (DEBUG_EXCEPTIONS) if (loglevel != 0) fprintf(logfile, "FIT exception\n"); #endif goto store_next; default: cpu_abort(env, "Invalid exception 0x1010 !\n"); break; } return; case 0x1020: idx = 12; switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_40x: /* Watchdog on 4xx */ msr &= ~0xFFFF0000; #if defined (DEBUG_EXCEPTIONS) if (loglevel != 0) fprintf(logfile, "WDT exception\n"); #endif goto store_next; case PPC_FLAGS_EXCP_BOOKE: srr_0 = &env->spr[SPR_BOOKE_CSRR0]; srr_1 = &env->spr[SPR_BOOKE_CSRR1]; break; default: cpu_abort(env, "Invalid exception 0x1020 !\n"); break; } return; case 0x1100: idx = 13; switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_40x: /* DTLBMISS on 4xx */ msr &= ~0xFFFF0000; goto store_next; case PPC_FLAGS_EXCP_602: case PPC_FLAGS_EXCP_603: /* DLTLBMISS on 602/603 */ goto store_gprs; case PPC_FLAGS_EXCP_7x5: /* DLTLBMISS on 745/755 */ goto tlb_miss; default: cpu_abort(env, "Invalid exception 0x1100 !\n"); break; } return; case 0x1200: idx = 14; switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_40x: /* ITLBMISS on 4xx */ msr &= ~0xFFFF0000; goto store_next; case PPC_FLAGS_EXCP_602: case PPC_FLAGS_EXCP_603: /* DSTLBMISS on 602/603 */ store_gprs: /* Swap temporary saved registers with GPRs */ swap_gpr_tgpr(env); msr_tgpr = 1; #if defined (DEBUG_SOFTWARE_TLB) if (loglevel != 0) { const unsigned char *es; target_ulong *miss, *cmp; int en; if (excp == 0x1000) { es = "I"; en = 'I'; miss = &env->spr[SPR_IMISS]; cmp = &env->spr[SPR_ICMP]; } else { if (excp == 0x1100) es = "DL"; else es = "DS"; en = 'D'; miss = &env->spr[SPR_DMISS]; cmp = &env->spr[SPR_DCMP]; } fprintf(logfile, "6xx %sTLB miss: %cM " ADDRX " %cC " ADDRX " H1 " ADDRX " H2 " ADDRX " %08x\n", es, en, *miss, en, *cmp, env->spr[SPR_HASH1], env->spr[SPR_HASH2], env->error_code); } #endif goto tlb_miss; case PPC_FLAGS_EXCP_7x5: /* DSTLBMISS on 745/755 */ tlb_miss: msr &= ~0xF83F0000; 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; goto store_next; default: cpu_abort(env, "Invalid exception 0x1200 !\n"); break; } return; case 0x1300: switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_601: case PPC_FLAGS_EXCP_602: case PPC_FLAGS_EXCP_603: case PPC_FLAGS_EXCP_604: case PPC_FLAGS_EXCP_7x0: case PPC_FLAGS_EXCP_7x5: /* IABR on 6xx/7xx */ /* XXX: TODO */ cpu_abort(env, "IABR exception is not implemented yet !\n"); goto store_next; default: cpu_abort(env, "Invalid exception 0x1300 !\n"); break; } return; case 0x1400: switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_601: case PPC_FLAGS_EXCP_602: case PPC_FLAGS_EXCP_603: case PPC_FLAGS_EXCP_604: case PPC_FLAGS_EXCP_7x0: case PPC_FLAGS_EXCP_7x5: /* SMI on 6xx/7xx */ /* XXX: TODO */ cpu_abort(env, "SMI exception is not implemented yet !\n"); goto store_next; default: cpu_abort(env, "Invalid exception 0x1400 !\n"); break; } return; case 0x1500: switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_602: /* Watchdog on 602 */ /* XXX: TODO */ cpu_abort(env, "602 watchdog exception is not implemented yet !\n"); goto store_next; case PPC_FLAGS_EXCP_970: /* Soft patch exception on 970 */ /* XXX: TODO */ cpu_abort(env, "970 soft-patch exception is not implemented yet !\n"); goto store_next; case PPC_FLAGS_EXCP_74xx: /* VPU assist on 74xx */ /* XXX: TODO */ cpu_abort(env, "VPU assist exception is not implemented yet !\n"); goto store_next; default: cpu_abort(env, "Invalid exception 0x1500 !\n"); break; } return; case 0x1600: switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_602: /* Emulation trap on 602 */ /* XXX: TODO */ cpu_abort(env, "602 emulation trap exception " "is not implemented yet !\n"); goto store_next; case PPC_FLAGS_EXCP_970: /* Maintenance exception on 970 */ /* XXX: TODO */ cpu_abort(env, "970 maintenance exception is not implemented yet !\n"); goto store_next; default: cpu_abort(env, "Invalid exception 0x1600 !\n"); break; } return; case 0x1700: switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_7x0: case PPC_FLAGS_EXCP_7x5: /* Thermal management interrupt on G3 */ /* XXX: TODO */ cpu_abort(env, "G3 thermal management exception " "is not implemented yet !\n"); goto store_next; case PPC_FLAGS_EXCP_970: /* VPU assist on 970 */ /* XXX: TODO */ cpu_abort(env, "970 VPU assist exception is not implemented yet !\n"); goto store_next; default: cpu_abort(env, "Invalid exception 0x1700 !\n"); break; } return; case 0x1800: switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_970: /* Thermal exception on 970 */ /* XXX: TODO */ cpu_abort(env, "970 thermal management exception " "is not implemented yet !\n"); goto store_next; default: cpu_abort(env, "Invalid exception 0x1800 !\n"); break; } return; case 0x2000: switch (PPC_EXCP(env)) { case PPC_FLAGS_EXCP_40x: /* DEBUG on 4xx */ /* XXX: TODO */ cpu_abort(env, "40x debug exception is not implemented yet !\n"); goto store_next; case PPC_FLAGS_EXCP_601: /* Run mode exception on 601 */ /* XXX: TODO */ cpu_abort(env, "601 run mode exception is not implemented yet !\n"); goto store_next; case PPC_FLAGS_EXCP_BOOKE: srr_0 = &env->spr[SPR_BOOKE_CSRR0]; srr_1 = &env->spr[SPR_BOOKE_CSRR1]; break; default: cpu_abort(env, "Invalid exception 0x1800 !\n"); break; } return; /* Other exceptions */ /* Qemu internal exceptions: * we should never come here with those values: abort execution */ default: cpu_abort(env, "Invalid exception: code %d (%04x)\n", excp, excp); return; store_current: /* save current instruction location */ *srr_0 = env->nip - 4; break; store_next: /* save next instruction location */ *srr_0 = env->nip; break; } /* Save msr */ *srr_1 = msr; if (asrr_0 != NULL) *asrr_0 = *srr_0; if (asrr_1 != NULL) *asrr_1 = *srr_1; /* If we disactivated any translation, flush TLBs */ if (msr_ir || msr_dr) { tlb_flush(env, 1); } /* reload MSR with correct bits */ msr_ee = 0; msr_pr = 0; msr_fp = 0; msr_fe0 = 0; msr_se = 0; msr_be = 0; msr_fe1 = 0; msr_ir = 0; msr_dr = 0; msr_ri = 0; msr_le = msr_ile; if (PPC_EXCP(env) == PPC_FLAGS_EXCP_BOOKE) { msr_cm = msr_icm; if (idx == -1 || (idx >= 16 && idx < 32)) { cpu_abort(env, "Invalid exception index for excp %d %08x idx %d\n", excp, excp, idx); } #if defined(TARGET_PPC64) if (msr_cm) env->nip = (uint64_t)env->spr[SPR_BOOKE_IVPR]; else #endif env->nip = (uint32_t)env->spr[SPR_BOOKE_IVPR]; if (idx < 16) env->nip |= env->spr[SPR_BOOKE_IVOR0 + idx]; else if (idx < 38) env->nip |= env->spr[SPR_BOOKE_IVOR32 + idx - 32]; } else { msr_sf = msr_isf; env->nip = excp; } do_compute_hflags(env); /* Jump to handler */ env->exception_index = EXCP_NONE; } void ppc_hw_interrupt (CPUPPCState *env) { int raised = 0; #if 1 if (loglevel & CPU_LOG_INT) { fprintf(logfile, "%s: %p pending %08x req %08x me %d ee %d\n", __func__, env, env->pending_interrupts, env->interrupt_request, msr_me, msr_ee); } #endif /* Raise it */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_RESET)) { /* External reset / critical input */ /* XXX: critical input should be handled another way. * This code is not correct ! */ env->exception_index = EXCP_RESET; env->pending_interrupts &= ~(1 << PPC_INTERRUPT_RESET); raised = 1; } if (raised == 0 && msr_me != 0) { /* Machine check exception */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_MCK)) { env->exception_index = EXCP_MACHINE_CHECK; env->pending_interrupts &= ~(1 << PPC_INTERRUPT_MCK); raised = 1; } } if (raised == 0 && msr_ee != 0) { #if defined(TARGET_PPC64H) /* PowerPC 64 with hypervisor mode support */ /* Hypervisor decrementer exception */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_HDECR)) { env->exception_index = EXCP_HDECR; env->pending_interrupts &= ~(1 << PPC_INTERRUPT_HDECR); raised = 1; } else #endif /* Decrementer exception */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_DECR)) { env->exception_index = EXCP_DECR; env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DECR); raised = 1; /* Programmable interval timer on embedded PowerPC */ } else if (env->pending_interrupts & (1 << PPC_INTERRUPT_PIT)) { env->exception_index = EXCP_40x_PIT; env->pending_interrupts &= ~(1 << PPC_INTERRUPT_PIT); raised = 1; /* Fixed interval timer on embedded PowerPC */ } else if (env->pending_interrupts & (1 << PPC_INTERRUPT_FIT)) { env->exception_index = EXCP_40x_FIT; env->pending_interrupts &= ~(1 << PPC_INTERRUPT_FIT); raised = 1; /* Watchdog timer on embedded PowerPC */ } else if (env->pending_interrupts & (1 << PPC_INTERRUPT_WDT)) { env->exception_index = EXCP_40x_WATCHDOG; env->pending_interrupts &= ~(1 << PPC_INTERRUPT_WDT); raised = 1; /* External interrupt */ } else if (env->pending_interrupts & (1 << PPC_INTERRUPT_EXT)) { env->exception_index = EXCP_EXTERNAL; /* Taking an external interrupt does not clear the external * interrupt status */ #if 0 env->pending_interrupts &= ~(1 << PPC_INTERRUPT_EXT); #endif raised = 1; #if 0 // TODO /* Thermal interrupt */ } else if (env->pending_interrupts & (1 << PPC_INTERRUPT_THERM)) { env->exception_index = EXCP_970_THRM; env->pending_interrupts &= ~(1 << PPC_INTERRUPT_THERM); raised = 1; #endif } #if 0 // TODO /* External debug exception */ } else if (env->pending_interrupts & (1 << PPC_INTERRUPT_DEBUG)) { env->exception_index = EXCP_xxx; env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DEBUG); raised = 1; #endif } if (raised != 0) { env->error_code = 0; do_interrupt(env); } } #endif /* !CONFIG_USER_ONLY */ void cpu_dump_EA (target_ulong EA) { FILE *f; if (logfile) { f = logfile; } else { f = stdout; return; } fprintf(f, "Memory access at address " ADDRX "\n", EA); } void cpu_dump_rfi (target_ulong RA, target_ulong msr) { FILE *f; if (logfile) { f = logfile; } else { f = stdout; return; } fprintf(f, "Return from exception at " ADDRX " with flags " ADDRX "\n", RA, msr); } void cpu_ppc_reset (void *opaque) { CPUPPCState *env; env = opaque; #if defined (DO_SINGLE_STEP) && 0 /* Single step trace mode */ msr_se = 1; msr_be = 1; #endif msr_fp = 1; /* Allow floating point exceptions */ msr_me = 1; /* Allow machine check exceptions */ #if defined(TARGET_PPC64) msr_sf = 0; /* Boot in 32 bits mode */ msr_cm = 0; #endif #if defined(CONFIG_USER_ONLY) msr_pr = 1; tlb_flush(env, 1); #else env->nip = 0xFFFFFFFC; ppc_tlb_invalidate_all(env); #endif do_compute_hflags(env); env->reserve = -1; } CPUPPCState *cpu_ppc_init (void) { CPUPPCState *env; env = qemu_mallocz(sizeof(CPUPPCState)); if (!env) return NULL; cpu_exec_init(env); cpu_ppc_reset(env); return env; } void cpu_ppc_close (CPUPPCState *env) { /* Should also remove all opcode tables... */ free(env); }