| /* |
| * PowerPC MMU, TLB, SLB and BAT 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 2.1 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 "qemu/units.h" |
| #include "cpu.h" |
| #include "sysemu/kvm.h" |
| #include "kvm_ppc.h" |
| #include "mmu-hash64.h" |
| #include "mmu-hash32.h" |
| #include "exec/exec-all.h" |
| #include "exec/page-protection.h" |
| #include "exec/log.h" |
| #include "helper_regs.h" |
| #include "qemu/error-report.h" |
| #include "qemu/qemu-print.h" |
| #include "internal.h" |
| #include "mmu-book3s-v3.h" |
| #include "mmu-radix64.h" |
| |
| /* #define DUMP_PAGE_TABLES */ |
| |
| /* Context used internally during MMU translations */ |
| typedef struct { |
| hwaddr raddr; /* Real address */ |
| hwaddr eaddr; /* Effective address */ |
| int prot; /* Protection bits */ |
| hwaddr hash[2]; /* Pagetable hash values */ |
| target_ulong ptem; /* Virtual segment ID | API */ |
| int key; /* Access key */ |
| int nx; /* Non-execute area */ |
| } mmu_ctx_t; |
| |
| void ppc_store_sdr1(CPUPPCState *env, target_ulong value) |
| { |
| PowerPCCPU *cpu = env_archcpu(env); |
| qemu_log_mask(CPU_LOG_MMU, "%s: " TARGET_FMT_lx "\n", __func__, value); |
| assert(!cpu->env.has_hv_mode || !cpu->vhyp); |
| #if defined(TARGET_PPC64) |
| if (mmu_is_64bit(env->mmu_model)) { |
| target_ulong sdr_mask = SDR_64_HTABORG | SDR_64_HTABSIZE; |
| target_ulong htabsize = value & SDR_64_HTABSIZE; |
| |
| if (value & ~sdr_mask) { |
| qemu_log_mask(LOG_GUEST_ERROR, "Invalid bits 0x"TARGET_FMT_lx |
| " set in SDR1", value & ~sdr_mask); |
| value &= sdr_mask; |
| } |
| if (htabsize > 28) { |
| qemu_log_mask(LOG_GUEST_ERROR, "Invalid HTABSIZE 0x" TARGET_FMT_lx |
| " stored in SDR1", htabsize); |
| return; |
| } |
| } |
| #endif /* defined(TARGET_PPC64) */ |
| /* FIXME: Should check for valid HTABMASK values in 32-bit case */ |
| env->spr[SPR_SDR1] = value; |
| } |
| |
| /*****************************************************************************/ |
| /* PowerPC MMU emulation */ |
| |
| static int pp_check(int key, int pp, int nx) |
| { |
| int access; |
| |
| /* Compute access rights */ |
| access = 0; |
| if (key == 0) { |
| switch (pp) { |
| case 0x0: |
| case 0x1: |
| case 0x2: |
| access |= PAGE_WRITE; |
| /* fall through */ |
| case 0x3: |
| access |= PAGE_READ; |
| break; |
| } |
| } else { |
| switch (pp) { |
| case 0x0: |
| access = 0; |
| break; |
| case 0x1: |
| case 0x3: |
| access = PAGE_READ; |
| break; |
| case 0x2: |
| access = PAGE_READ | PAGE_WRITE; |
| break; |
| } |
| } |
| if (nx == 0) { |
| access |= PAGE_EXEC; |
| } |
| |
| return access; |
| } |
| |
| static int check_prot(int prot, MMUAccessType access_type) |
| { |
| return prot & prot_for_access_type(access_type) ? 0 : -2; |
| } |
| |
| int ppc6xx_tlb_getnum(CPUPPCState *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; |
| } |
| |
| static int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, target_ulong pte0, |
| target_ulong pte1, int h, |
| MMUAccessType access_type) |
| { |
| target_ulong ptem, mmask; |
| int access, ret, pteh, ptev, pp; |
| |
| ret = -1; |
| /* Check validity and table match */ |
| ptev = pte_is_valid(pte0); |
| pteh = (pte0 >> 6) & 1; |
| if (ptev && h == pteh) { |
| /* Check vsid & api */ |
| ptem = pte0 & PTE_PTEM_MASK; |
| mmask = PTE_CHECK_MASK; |
| pp = pte1 & 0x00000003; |
| if (ptem == ctx->ptem) { |
| if (ctx->raddr != (hwaddr)-1ULL) { |
| /* all matches should have equal RPN, WIMG & PP */ |
| if ((ctx->raddr & mmask) != (pte1 & mmask)) { |
| qemu_log_mask(CPU_LOG_MMU, "Bad RPN/WIMG/PP\n"); |
| return -3; |
| } |
| } |
| /* Compute access rights */ |
| access = pp_check(ctx->key, pp, ctx->nx); |
| /* Keep the matching PTE information */ |
| ctx->raddr = pte1; |
| ctx->prot = access; |
| ret = check_prot(ctx->prot, access_type); |
| if (ret == 0) { |
| /* Access granted */ |
| qemu_log_mask(CPU_LOG_MMU, "PTE access granted !\n"); |
| } else { |
| /* Access right violation */ |
| qemu_log_mask(CPU_LOG_MMU, "PTE access rejected\n"); |
| } |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int pte_update_flags(mmu_ctx_t *ctx, target_ulong *pte1p, |
| int ret, MMUAccessType access_type) |
| { |
| int store = 0; |
| |
| /* Update page flags */ |
| if (!(*pte1p & 0x00000100)) { |
| /* Update accessed flag */ |
| *pte1p |= 0x00000100; |
| store = 1; |
| } |
| if (!(*pte1p & 0x00000080)) { |
| if (access_type == MMU_DATA_STORE && 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_check(CPUPPCState *env, mmu_ctx_t *ctx, |
| target_ulong eaddr, MMUAccessType 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 == MMU_INST_FETCH); |
| tlb = &env->tlb.tlb6[nr]; |
| /* This test "emulates" the PTE index match for hardware TLBs */ |
| if ((eaddr & TARGET_PAGE_MASK) != tlb->EPN) { |
| qemu_log_mask(CPU_LOG_MMU, "TLB %d/%d %s [" TARGET_FMT_lx |
| " " TARGET_FMT_lx "] <> " TARGET_FMT_lx "\n", |
| nr, env->nb_tlb, |
| pte_is_valid(tlb->pte0) ? "valid" : "inval", |
| tlb->EPN, tlb->EPN + TARGET_PAGE_SIZE, eaddr); |
| continue; |
| } |
| qemu_log_mask(CPU_LOG_MMU, "TLB %d/%d %s " TARGET_FMT_lx " <> " |
| TARGET_FMT_lx " " TARGET_FMT_lx " %c %c\n", |
| nr, env->nb_tlb, |
| pte_is_valid(tlb->pte0) ? "valid" : "inval", |
| tlb->EPN, eaddr, tlb->pte1, |
| access_type == MMU_DATA_STORE ? 'S' : 'L', |
| access_type == MMU_INST_FETCH ? 'I' : 'D'); |
| switch (ppc6xx_tlb_pte_check(ctx, tlb->pte0, tlb->pte1, |
| 0, access_type)) { |
| case -2: |
| /* Access violation */ |
| ret = -2; |
| best = nr; |
| break; |
| case -1: /* No match */ |
| case -3: /* TLB inconsistency */ |
| default: |
| 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: |
| qemu_log_mask(CPU_LOG_MMU, "found TLB at addr " HWADDR_FMT_plx |
| " prot=%01x ret=%d\n", |
| ctx->raddr & TARGET_PAGE_MASK, ctx->prot, ret); |
| /* Update page flags */ |
| pte_update_flags(ctx, &env->tlb.tlb6[best].pte1, ret, access_type); |
| } |
| #if defined(DUMP_PAGE_TABLES) |
| if (qemu_loglevel_mask(CPU_LOG_MMU)) { |
| CPUState *cs = env_cpu(env); |
| hwaddr base = ppc_hash32_hpt_base(env_archcpu(env)); |
| hwaddr len = ppc_hash32_hpt_mask(env_archcpu(env)) + 0x80; |
| uint32_t a0, a1, a2, a3; |
| |
| qemu_log("Page table: " HWADDR_FMT_plx " len " HWADDR_FMT_plx "\n", |
| base, len); |
| for (hwaddr curaddr = base; curaddr < base + len; curaddr += 16) { |
| a0 = ldl_phys(cs->as, curaddr); |
| a1 = ldl_phys(cs->as, curaddr + 4); |
| a2 = ldl_phys(cs->as, curaddr + 8); |
| a3 = ldl_phys(cs->as, curaddr + 12); |
| if (a0 != 0 || a1 != 0 || a2 != 0 || a3 != 0) { |
| qemu_log(HWADDR_FMT_plx ": %08x %08x %08x %08x\n", |
| curaddr, a0, a1, a2, a3); |
| } |
| } |
| } |
| #endif |
| return ret; |
| } |
| |
| /* Perform BAT hit & translation */ |
| static inline void bat_size_prot(CPUPPCState *env, target_ulong *blp, |
| int *validp, int *protp, target_ulong *BATu, |
| target_ulong *BATl) |
| { |
| target_ulong bl; |
| int pp, valid, prot; |
| |
| bl = (*BATu & 0x00001FFC) << 15; |
| valid = 0; |
| prot = 0; |
| if ((!FIELD_EX64(env->msr, MSR, PR) && (*BATu & 0x00000002)) || |
| (FIELD_EX64(env->msr, MSR, PR) && (*BATu & 0x00000001))) { |
| valid = 1; |
| pp = *BATl & 0x00000003; |
| if (pp != 0) { |
| prot = PAGE_READ | PAGE_EXEC; |
| if (pp == 0x2) { |
| prot |= PAGE_WRITE; |
| } |
| } |
| } |
| *blp = bl; |
| *validp = valid; |
| *protp = prot; |
| } |
| |
| static int get_bat_6xx_tlb(CPUPPCState *env, mmu_ctx_t *ctx, |
| target_ulong virtual, MMUAccessType access_type) |
| { |
| target_ulong *BATlt, *BATut, *BATu, *BATl; |
| target_ulong BEPIl, BEPIu, bl; |
| int i, valid, prot; |
| int ret = -1; |
| bool ifetch = access_type == MMU_INST_FETCH; |
| |
| qemu_log_mask(CPU_LOG_MMU, "%s: %cBAT v " TARGET_FMT_lx "\n", __func__, |
| ifetch ? 'I' : 'D', virtual); |
| if (ifetch) { |
| BATlt = env->IBAT[1]; |
| BATut = env->IBAT[0]; |
| } else { |
| BATlt = env->DBAT[1]; |
| BATut = env->DBAT[0]; |
| } |
| for (i = 0; i < env->nb_BATs; i++) { |
| BATu = &BATut[i]; |
| BATl = &BATlt[i]; |
| BEPIu = *BATu & 0xF0000000; |
| BEPIl = *BATu & 0x0FFE0000; |
| bat_size_prot(env, &bl, &valid, &prot, BATu, BATl); |
| qemu_log_mask(CPU_LOG_MMU, "%s: %cBAT%d v " TARGET_FMT_lx " BATu " |
| TARGET_FMT_lx " BATl " TARGET_FMT_lx "\n", __func__, |
| ifetch ? 'I' : 'D', i, virtual, *BATu, *BATl); |
| if ((virtual & 0xF0000000) == BEPIu && |
| ((virtual & 0x0FFE0000) & ~bl) == BEPIl) { |
| /* BAT matches */ |
| if (valid != 0) { |
| /* Get physical address */ |
| ctx->raddr = (*BATl & 0xF0000000) | |
| ((virtual & 0x0FFE0000 & bl) | (*BATl & 0x0FFE0000)) | |
| (virtual & 0x0001F000); |
| /* Compute access rights */ |
| ctx->prot = prot; |
| ret = check_prot(ctx->prot, access_type); |
| if (ret == 0) { |
| qemu_log_mask(CPU_LOG_MMU, "BAT %d match: r " HWADDR_FMT_plx |
| " prot=%c%c\n", i, ctx->raddr, |
| ctx->prot & PAGE_READ ? 'R' : '-', |
| ctx->prot & PAGE_WRITE ? 'W' : '-'); |
| } |
| break; |
| } |
| } |
| } |
| if (ret < 0) { |
| if (qemu_log_enabled()) { |
| qemu_log_mask(CPU_LOG_MMU, "no BAT match for " |
| TARGET_FMT_lx ":\n", virtual); |
| for (i = 0; i < 4; i++) { |
| BATu = &BATut[i]; |
| BATl = &BATlt[i]; |
| BEPIu = *BATu & 0xF0000000; |
| BEPIl = *BATu & 0x0FFE0000; |
| bl = (*BATu & 0x00001FFC) << 15; |
| qemu_log_mask(CPU_LOG_MMU, "%s: %cBAT%d v " TARGET_FMT_lx |
| " BATu " TARGET_FMT_lx " BATl " TARGET_FMT_lx |
| "\n\t" TARGET_FMT_lx " " TARGET_FMT_lx " " |
| TARGET_FMT_lx "\n", __func__, ifetch ? 'I' : 'D', |
| i, virtual, *BATu, *BATl, BEPIu, BEPIl, bl); |
| } |
| } |
| } |
| /* No hit */ |
| return ret; |
| } |
| |
| static int mmu6xx_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx, |
| target_ulong eaddr, |
| MMUAccessType access_type, int type) |
| { |
| PowerPCCPU *cpu = env_archcpu(env); |
| hwaddr hash; |
| target_ulong vsid, sr, pgidx; |
| int ds, target_page_bits; |
| bool pr; |
| |
| /* First try to find a BAT entry if there are any */ |
| if (env->nb_BATs && get_bat_6xx_tlb(env, ctx, eaddr, access_type) == 0) { |
| return 0; |
| } |
| |
| /* Perform segment based translation when no BATs matched */ |
| pr = FIELD_EX64(env->msr, MSR, PR); |
| ctx->eaddr = eaddr; |
| |
| sr = env->sr[eaddr >> 28]; |
| ctx->key = (((sr & 0x20000000) && pr) || |
| ((sr & 0x40000000) && !pr)) ? 1 : 0; |
| ds = sr & 0x80000000 ? 1 : 0; |
| ctx->nx = sr & 0x10000000 ? 1 : 0; |
| vsid = sr & 0x00FFFFFF; |
| target_page_bits = TARGET_PAGE_BITS; |
| qemu_log_mask(CPU_LOG_MMU, |
| "Check segment v=" TARGET_FMT_lx " %d " TARGET_FMT_lx |
| " nip=" TARGET_FMT_lx " lr=" TARGET_FMT_lx |
| " ir=%d dr=%d pr=%d %d t=%d\n", |
| eaddr, (int)(eaddr >> 28), sr, env->nip, env->lr, |
| (int)FIELD_EX64(env->msr, MSR, IR), |
| (int)FIELD_EX64(env->msr, MSR, DR), pr ? 1 : 0, |
| access_type == MMU_DATA_STORE, type); |
| pgidx = (eaddr & ~SEGMENT_MASK_256M) >> target_page_bits; |
| hash = vsid ^ pgidx; |
| ctx->ptem = (vsid << 7) | (pgidx >> 10); |
| |
| qemu_log_mask(CPU_LOG_MMU, "pte segment: key=%d ds %d nx %d vsid " |
| TARGET_FMT_lx "\n", ctx->key, ds, ctx->nx, vsid); |
| if (!ds) { |
| /* Check if instruction fetch is allowed, if needed */ |
| if (type == ACCESS_CODE && ctx->nx) { |
| qemu_log_mask(CPU_LOG_MMU, "No access allowed\n"); |
| return -3; |
| } |
| /* Page address translation */ |
| qemu_log_mask(CPU_LOG_MMU, "htab_base " HWADDR_FMT_plx " htab_mask " |
| HWADDR_FMT_plx " hash " HWADDR_FMT_plx "\n", |
| ppc_hash32_hpt_base(cpu), ppc_hash32_hpt_mask(cpu), hash); |
| ctx->hash[0] = hash; |
| ctx->hash[1] = ~hash; |
| |
| /* Initialize real address with an invalid value */ |
| ctx->raddr = (hwaddr)-1ULL; |
| /* Software TLB search */ |
| return ppc6xx_tlb_check(env, ctx, eaddr, access_type); |
| } |
| |
| /* Direct-store segment : absolutely *BUGGY* for now */ |
| qemu_log_mask(CPU_LOG_MMU, "direct store...\n"); |
| 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: |
| qemu_log_mask(CPU_LOG_MMU, "ERROR: instruction should not need address" |
| " translation\n"); |
| return -4; |
| } |
| if ((access_type == MMU_DATA_STORE || ctx->key != 1) && |
| (access_type == MMU_DATA_LOAD || ctx->key != 0)) { |
| ctx->raddr = eaddr; |
| return 2; |
| } |
| return -2; |
| } |
| |
| /* Generic TLB check function for embedded PowerPC implementations */ |
| static bool ppcemb_tlb_check(CPUPPCState *env, ppcemb_tlb_t *tlb, |
| hwaddr *raddrp, |
| target_ulong address, uint32_t pid, int i) |
| { |
| target_ulong mask; |
| |
| /* Check valid flag */ |
| if (!(tlb->prot & PAGE_VALID)) { |
| return false; |
| } |
| mask = ~(tlb->size - 1); |
| qemu_log_mask(CPU_LOG_MMU, "%s: TLB %d address " TARGET_FMT_lx |
| " PID %u <=> " TARGET_FMT_lx " " TARGET_FMT_lx " %u %x\n", |
| __func__, i, address, pid, tlb->EPN, |
| mask, (uint32_t)tlb->PID, tlb->prot); |
| /* Check PID */ |
| if (tlb->PID != 0 && tlb->PID != pid) { |
| return false; |
| } |
| /* Check effective address */ |
| if ((address & mask) != tlb->EPN) { |
| return false; |
| } |
| *raddrp = (tlb->RPN & mask) | (address & ~mask); |
| return true; |
| } |
| |
| /* Generic TLB search function for PowerPC embedded implementations */ |
| int ppcemb_tlb_search(CPUPPCState *env, target_ulong address, uint32_t pid) |
| { |
| ppcemb_tlb_t *tlb; |
| hwaddr raddr; |
| int i; |
| |
| for (i = 0; i < env->nb_tlb; i++) { |
| tlb = &env->tlb.tlbe[i]; |
| if (ppcemb_tlb_check(env, tlb, &raddr, address, pid, i)) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| static int mmu40x_get_physical_address(CPUPPCState *env, hwaddr *raddr, |
| int *prot, target_ulong address, |
| MMUAccessType access_type) |
| { |
| ppcemb_tlb_t *tlb; |
| int i, ret, zsel, zpr, pr; |
| |
| ret = -1; |
| pr = FIELD_EX64(env->msr, MSR, PR); |
| for (i = 0; i < env->nb_tlb; i++) { |
| tlb = &env->tlb.tlbe[i]; |
| if (!ppcemb_tlb_check(env, tlb, raddr, address, |
| env->spr[SPR_40x_PID], i)) { |
| continue; |
| } |
| zsel = (tlb->attr >> 4) & 0xF; |
| zpr = (env->spr[SPR_40x_ZPR] >> (30 - (2 * zsel))) & 0x3; |
| qemu_log_mask(CPU_LOG_MMU, |
| "%s: TLB %d zsel %d zpr %d ty %d attr %08x\n", |
| __func__, i, zsel, zpr, access_type, tlb->attr); |
| /* Check execute enable bit */ |
| switch (zpr) { |
| case 0x2: |
| if (pr != 0) { |
| goto check_perms; |
| } |
| /* fall through */ |
| case 0x3: |
| /* All accesses granted */ |
| *prot = PAGE_RWX; |
| ret = 0; |
| break; |
| |
| case 0x0: |
| if (pr != 0) { |
| /* Raise Zone protection fault. */ |
| env->spr[SPR_40x_ESR] = 1 << 22; |
| *prot = 0; |
| ret = -2; |
| break; |
| } |
| /* fall through */ |
| case 0x1: |
| check_perms: |
| /* Check from TLB entry */ |
| *prot = tlb->prot; |
| ret = check_prot(*prot, access_type); |
| if (ret == -2) { |
| env->spr[SPR_40x_ESR] = 0; |
| } |
| break; |
| } |
| } |
| qemu_log_mask(CPU_LOG_MMU, "%s: access %s " TARGET_FMT_lx " => " |
| HWADDR_FMT_plx " %d %d\n", __func__, |
| ret < 0 ? "refused" : "granted", address, |
| ret < 0 ? 0 : *raddr, *prot, ret); |
| |
| return ret; |
| } |
| |
| static bool mmubooke_check_pid(CPUPPCState *env, ppcemb_tlb_t *tlb, |
| hwaddr *raddr, target_ulong addr, int i) |
| { |
| if (ppcemb_tlb_check(env, tlb, raddr, addr, env->spr[SPR_BOOKE_PID], i)) { |
| if (!env->nb_pids) { |
| /* Extend the physical address to 36 bits */ |
| *raddr |= (uint64_t)(tlb->RPN & 0xF) << 32; |
| } |
| return true; |
| } else if (!env->nb_pids) { |
| return false; |
| } |
| if (env->spr[SPR_BOOKE_PID1] && |
| ppcemb_tlb_check(env, tlb, raddr, addr, env->spr[SPR_BOOKE_PID1], i)) { |
| return true; |
| } |
| if (env->spr[SPR_BOOKE_PID2] && |
| ppcemb_tlb_check(env, tlb, raddr, addr, env->spr[SPR_BOOKE_PID2], i)) { |
| return true; |
| } |
| return false; |
| } |
| |
| static int mmubooke_check_tlb(CPUPPCState *env, ppcemb_tlb_t *tlb, |
| hwaddr *raddr, int *prot, target_ulong address, |
| MMUAccessType access_type, int i) |
| { |
| if (!mmubooke_check_pid(env, tlb, raddr, address, i)) { |
| qemu_log_mask(CPU_LOG_MMU, "%s: TLB entry not found\n", __func__); |
| return -1; |
| } |
| |
| /* Check the address space */ |
| if ((access_type == MMU_INST_FETCH ? |
| FIELD_EX64(env->msr, MSR, IR) : |
| FIELD_EX64(env->msr, MSR, DR)) != (tlb->attr & 1)) { |
| qemu_log_mask(CPU_LOG_MMU, "%s: AS doesn't match\n", __func__); |
| return -1; |
| } |
| |
| if (FIELD_EX64(env->msr, MSR, PR)) { |
| *prot = tlb->prot & 0xF; |
| } else { |
| *prot = (tlb->prot >> 4) & 0xF; |
| } |
| if (*prot & prot_for_access_type(access_type)) { |
| qemu_log_mask(CPU_LOG_MMU, "%s: good TLB!\n", __func__); |
| return 0; |
| } |
| |
| qemu_log_mask(CPU_LOG_MMU, "%s: no prot match: %x\n", __func__, *prot); |
| return access_type == MMU_INST_FETCH ? -3 : -2; |
| } |
| |
| static int mmubooke_get_physical_address(CPUPPCState *env, hwaddr *raddr, |
| int *prot, target_ulong address, |
| MMUAccessType access_type) |
| { |
| ppcemb_tlb_t *tlb; |
| int i, ret = -1; |
| |
| for (i = 0; i < env->nb_tlb; i++) { |
| tlb = &env->tlb.tlbe[i]; |
| ret = mmubooke_check_tlb(env, tlb, raddr, prot, address, |
| access_type, i); |
| if (ret != -1) { |
| break; |
| } |
| } |
| qemu_log_mask(CPU_LOG_MMU, |
| "%s: access %s " TARGET_FMT_lx " => " HWADDR_FMT_plx |
| " %d %d\n", __func__, ret < 0 ? "refused" : "granted", |
| address, ret < 0 ? -1 : *raddr, ret == -1 ? 0 : *prot, ret); |
| return ret; |
| } |
| |
| hwaddr booke206_tlb_to_page_size(CPUPPCState *env, ppcmas_tlb_t *tlb) |
| { |
| int tlbm_size; |
| |
| tlbm_size = (tlb->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; |
| |
| return 1024ULL << tlbm_size; |
| } |
| |
| /* TLB check function for MAS based SoftTLBs */ |
| int ppcmas_tlb_check(CPUPPCState *env, ppcmas_tlb_t *tlb, hwaddr *raddrp, |
| target_ulong address, uint32_t pid) |
| { |
| hwaddr mask; |
| uint32_t tlb_pid; |
| |
| if (!FIELD_EX64(env->msr, MSR, CM)) { |
| /* In 32bit mode we can only address 32bit EAs */ |
| address = (uint32_t)address; |
| } |
| |
| /* Check valid flag */ |
| if (!(tlb->mas1 & MAS1_VALID)) { |
| return -1; |
| } |
| |
| mask = ~(booke206_tlb_to_page_size(env, tlb) - 1); |
| qemu_log_mask(CPU_LOG_MMU, "%s: TLB ADDR=0x" TARGET_FMT_lx |
| " PID=0x%x MAS1=0x%x MAS2=0x%" PRIx64 " mask=0x%" |
| HWADDR_PRIx " MAS7_3=0x%" PRIx64 " MAS8=0x%" PRIx32 "\n", |
| __func__, address, pid, tlb->mas1, tlb->mas2, mask, |
| tlb->mas7_3, tlb->mas8); |
| |
| /* Check PID */ |
| tlb_pid = (tlb->mas1 & MAS1_TID_MASK) >> MAS1_TID_SHIFT; |
| if (tlb_pid != 0 && tlb_pid != pid) { |
| return -1; |
| } |
| |
| /* Check effective address */ |
| if ((address & mask) != (tlb->mas2 & MAS2_EPN_MASK)) { |
| return -1; |
| } |
| |
| if (raddrp) { |
| *raddrp = (tlb->mas7_3 & mask) | (address & ~mask); |
| } |
| |
| return 0; |
| } |
| |
| static bool is_epid_mmu(int mmu_idx) |
| { |
| return mmu_idx == PPC_TLB_EPID_STORE || mmu_idx == PPC_TLB_EPID_LOAD; |
| } |
| |
| static uint32_t mmubooke206_esr(int mmu_idx, MMUAccessType access_type) |
| { |
| uint32_t esr = 0; |
| if (access_type == MMU_DATA_STORE) { |
| esr |= ESR_ST; |
| } |
| if (is_epid_mmu(mmu_idx)) { |
| esr |= ESR_EPID; |
| } |
| return esr; |
| } |
| |
| /* |
| * Get EPID register given the mmu_idx. If this is regular load, |
| * construct the EPID access bits from current processor state |
| * |
| * Get the effective AS and PR bits and the PID. The PID is returned |
| * only if EPID load is requested, otherwise the caller must detect |
| * the correct EPID. Return true if valid EPID is returned. |
| */ |
| static bool mmubooke206_get_as(CPUPPCState *env, |
| int mmu_idx, uint32_t *epid_out, |
| bool *as_out, bool *pr_out) |
| { |
| if (is_epid_mmu(mmu_idx)) { |
| uint32_t epidr; |
| if (mmu_idx == PPC_TLB_EPID_STORE) { |
| epidr = env->spr[SPR_BOOKE_EPSC]; |
| } else { |
| epidr = env->spr[SPR_BOOKE_EPLC]; |
| } |
| *epid_out = (epidr & EPID_EPID) >> EPID_EPID_SHIFT; |
| *as_out = !!(epidr & EPID_EAS); |
| *pr_out = !!(epidr & EPID_EPR); |
| return true; |
| } else { |
| *as_out = FIELD_EX64(env->msr, MSR, DS); |
| *pr_out = FIELD_EX64(env->msr, MSR, PR); |
| return false; |
| } |
| } |
| |
| /* Check if the tlb found by hashing really matches */ |
| static int mmubooke206_check_tlb(CPUPPCState *env, ppcmas_tlb_t *tlb, |
| hwaddr *raddr, int *prot, |
| target_ulong address, |
| MMUAccessType access_type, int mmu_idx) |
| { |
| uint32_t epid; |
| bool as, pr; |
| bool use_epid = mmubooke206_get_as(env, mmu_idx, &epid, &as, &pr); |
| |
| if (!use_epid) { |
| if (ppcmas_tlb_check(env, tlb, raddr, address, |
| env->spr[SPR_BOOKE_PID]) >= 0) { |
| goto found_tlb; |
| } |
| |
| if (env->spr[SPR_BOOKE_PID1] && |
| ppcmas_tlb_check(env, tlb, raddr, address, |
| env->spr[SPR_BOOKE_PID1]) >= 0) { |
| goto found_tlb; |
| } |
| |
| if (env->spr[SPR_BOOKE_PID2] && |
| ppcmas_tlb_check(env, tlb, raddr, address, |
| env->spr[SPR_BOOKE_PID2]) >= 0) { |
| goto found_tlb; |
| } |
| } else { |
| if (ppcmas_tlb_check(env, tlb, raddr, address, epid) >= 0) { |
| goto found_tlb; |
| } |
| } |
| |
| qemu_log_mask(CPU_LOG_MMU, "%s: No TLB entry found for effective address " |
| "0x" TARGET_FMT_lx "\n", __func__, address); |
| return -1; |
| |
| found_tlb: |
| |
| /* Check the address space and permissions */ |
| if (access_type == MMU_INST_FETCH) { |
| /* There is no way to fetch code using epid load */ |
| assert(!use_epid); |
| as = FIELD_EX64(env->msr, MSR, IR); |
| } |
| |
| if (as != ((tlb->mas1 & MAS1_TS) >> MAS1_TS_SHIFT)) { |
| qemu_log_mask(CPU_LOG_MMU, "%s: AS doesn't match\n", __func__); |
| return -1; |
| } |
| |
| *prot = 0; |
| if (pr) { |
| if (tlb->mas7_3 & MAS3_UR) { |
| *prot |= PAGE_READ; |
| } |
| if (tlb->mas7_3 & MAS3_UW) { |
| *prot |= PAGE_WRITE; |
| } |
| if (tlb->mas7_3 & MAS3_UX) { |
| *prot |= PAGE_EXEC; |
| } |
| } else { |
| if (tlb->mas7_3 & MAS3_SR) { |
| *prot |= PAGE_READ; |
| } |
| if (tlb->mas7_3 & MAS3_SW) { |
| *prot |= PAGE_WRITE; |
| } |
| if (tlb->mas7_3 & MAS3_SX) { |
| *prot |= PAGE_EXEC; |
| } |
| } |
| if (*prot & prot_for_access_type(access_type)) { |
| qemu_log_mask(CPU_LOG_MMU, "%s: good TLB!\n", __func__); |
| return 0; |
| } |
| |
| qemu_log_mask(CPU_LOG_MMU, "%s: no prot match: %x\n", __func__, *prot); |
| return access_type == MMU_INST_FETCH ? -3 : -2; |
| } |
| |
| static int mmubooke206_get_physical_address(CPUPPCState *env, hwaddr *raddr, |
| int *prot, target_ulong address, |
| MMUAccessType access_type, |
| int mmu_idx) |
| { |
| ppcmas_tlb_t *tlb; |
| int i, j, ret = -1; |
| |
| for (i = 0; i < BOOKE206_MAX_TLBN; i++) { |
| int ways = booke206_tlb_ways(env, i); |
| for (j = 0; j < ways; j++) { |
| tlb = booke206_get_tlbm(env, i, address, j); |
| if (!tlb) { |
| continue; |
| } |
| ret = mmubooke206_check_tlb(env, tlb, raddr, prot, address, |
| access_type, mmu_idx); |
| if (ret != -1) { |
| goto found_tlb; |
| } |
| } |
| } |
| |
| found_tlb: |
| |
| qemu_log_mask(CPU_LOG_MMU, "%s: access %s " TARGET_FMT_lx " => " |
| HWADDR_FMT_plx " %d %d\n", __func__, |
| ret < 0 ? "refused" : "granted", address, |
| ret < 0 ? -1 : *raddr, ret == -1 ? 0 : *prot, ret); |
| return ret; |
| } |
| |
| static const char *book3e_tsize_to_str[32] = { |
| "1K", "2K", "4K", "8K", "16K", "32K", "64K", "128K", "256K", "512K", |
| "1M", "2M", "4M", "8M", "16M", "32M", "64M", "128M", "256M", "512M", |
| "1G", "2G", "4G", "8G", "16G", "32G", "64G", "128G", "256G", "512G", |
| "1T", "2T" |
| }; |
| |
| static void mmubooke_dump_mmu(CPUPPCState *env) |
| { |
| ppcemb_tlb_t *entry; |
| int i; |
| |
| #ifdef CONFIG_KVM |
| if (kvm_enabled() && !env->kvm_sw_tlb) { |
| qemu_printf("Cannot access KVM TLB\n"); |
| return; |
| } |
| #endif |
| |
| qemu_printf("\nTLB:\n"); |
| qemu_printf("Effective Physical Size PID Prot " |
| "Attr\n"); |
| |
| entry = &env->tlb.tlbe[0]; |
| for (i = 0; i < env->nb_tlb; i++, entry++) { |
| hwaddr ea, pa; |
| target_ulong mask; |
| uint64_t size = (uint64_t)entry->size; |
| char size_buf[20]; |
| |
| /* Check valid flag */ |
| if (!(entry->prot & PAGE_VALID)) { |
| continue; |
| } |
| |
| mask = ~(entry->size - 1); |
| ea = entry->EPN & mask; |
| pa = entry->RPN & mask; |
| /* Extend the physical address to 36 bits */ |
| pa |= (hwaddr)(entry->RPN & 0xF) << 32; |
| if (size >= 1 * MiB) { |
| snprintf(size_buf, sizeof(size_buf), "%3" PRId64 "M", size / MiB); |
| } else { |
| snprintf(size_buf, sizeof(size_buf), "%3" PRId64 "k", size / KiB); |
| } |
| qemu_printf("0x%016" PRIx64 " 0x%016" PRIx64 " %s %-5u %08x %08x\n", |
| (uint64_t)ea, (uint64_t)pa, size_buf, (uint32_t)entry->PID, |
| entry->prot, entry->attr); |
| } |
| |
| } |
| |
| static void mmubooke206_dump_one_tlb(CPUPPCState *env, int tlbn, int offset, |
| int tlbsize) |
| { |
| ppcmas_tlb_t *entry; |
| int i; |
| |
| qemu_printf("\nTLB%d:\n", tlbn); |
| qemu_printf("Effective Physical Size TID TS SRWX" |
| " URWX WIMGE U0123\n"); |
| |
| entry = &env->tlb.tlbm[offset]; |
| for (i = 0; i < tlbsize; i++, entry++) { |
| hwaddr ea, pa, size; |
| int tsize; |
| |
| if (!(entry->mas1 & MAS1_VALID)) { |
| continue; |
| } |
| |
| tsize = (entry->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; |
| size = 1024ULL << tsize; |
| ea = entry->mas2 & ~(size - 1); |
| pa = entry->mas7_3 & ~(size - 1); |
| |
| qemu_printf("0x%016" PRIx64 " 0x%016" PRIx64 " %4s %-5u %1u S%c%c%c" |
| " U%c%c%c %c%c%c%c%c U%c%c%c%c\n", |
| (uint64_t)ea, (uint64_t)pa, |
| book3e_tsize_to_str[tsize], |
| (entry->mas1 & MAS1_TID_MASK) >> MAS1_TID_SHIFT, |
| (entry->mas1 & MAS1_TS) >> MAS1_TS_SHIFT, |
| entry->mas7_3 & MAS3_SR ? 'R' : '-', |
| entry->mas7_3 & MAS3_SW ? 'W' : '-', |
| entry->mas7_3 & MAS3_SX ? 'X' : '-', |
| entry->mas7_3 & MAS3_UR ? 'R' : '-', |
| entry->mas7_3 & MAS3_UW ? 'W' : '-', |
| entry->mas7_3 & MAS3_UX ? 'X' : '-', |
| entry->mas2 & MAS2_W ? 'W' : '-', |
| entry->mas2 & MAS2_I ? 'I' : '-', |
| entry->mas2 & MAS2_M ? 'M' : '-', |
| entry->mas2 & MAS2_G ? 'G' : '-', |
| entry->mas2 & MAS2_E ? 'E' : '-', |
| entry->mas7_3 & MAS3_U0 ? '0' : '-', |
| entry->mas7_3 & MAS3_U1 ? '1' : '-', |
| entry->mas7_3 & MAS3_U2 ? '2' : '-', |
| entry->mas7_3 & MAS3_U3 ? '3' : '-'); |
| } |
| } |
| |
| static void mmubooke206_dump_mmu(CPUPPCState *env) |
| { |
| int offset = 0; |
| int i; |
| |
| #ifdef CONFIG_KVM |
| if (kvm_enabled() && !env->kvm_sw_tlb) { |
| qemu_printf("Cannot access KVM TLB\n"); |
| return; |
| } |
| #endif |
| |
| for (i = 0; i < BOOKE206_MAX_TLBN; i++) { |
| int size = booke206_tlb_size(env, i); |
| |
| if (size == 0) { |
| continue; |
| } |
| |
| mmubooke206_dump_one_tlb(env, i, offset, size); |
| offset += size; |
| } |
| } |
| |
| static void mmu6xx_dump_BATs(CPUPPCState *env, int type) |
| { |
| target_ulong *BATlt, *BATut, *BATu, *BATl; |
| target_ulong BEPIl, BEPIu, bl; |
| int i; |
| |
| switch (type) { |
| case ACCESS_CODE: |
| BATlt = env->IBAT[1]; |
| BATut = env->IBAT[0]; |
| break; |
| default: |
| BATlt = env->DBAT[1]; |
| BATut = env->DBAT[0]; |
| break; |
| } |
| |
| for (i = 0; i < env->nb_BATs; i++) { |
| BATu = &BATut[i]; |
| BATl = &BATlt[i]; |
| BEPIu = *BATu & 0xF0000000; |
| BEPIl = *BATu & 0x0FFE0000; |
| bl = (*BATu & 0x00001FFC) << 15; |
| qemu_printf("%s BAT%d BATu " TARGET_FMT_lx |
| " BATl " TARGET_FMT_lx "\n\t" TARGET_FMT_lx " " |
| TARGET_FMT_lx " " TARGET_FMT_lx "\n", |
| type == ACCESS_CODE ? "code" : "data", i, |
| *BATu, *BATl, BEPIu, BEPIl, bl); |
| } |
| } |
| |
| static void mmu6xx_dump_mmu(CPUPPCState *env) |
| { |
| PowerPCCPU *cpu = env_archcpu(env); |
| ppc6xx_tlb_t *tlb; |
| target_ulong sr; |
| int type, way, entry, i; |
| |
| qemu_printf("HTAB base = 0x%"HWADDR_PRIx"\n", ppc_hash32_hpt_base(cpu)); |
| qemu_printf("HTAB mask = 0x%"HWADDR_PRIx"\n", ppc_hash32_hpt_mask(cpu)); |
| |
| qemu_printf("\nSegment registers:\n"); |
| for (i = 0; i < 32; i++) { |
| sr = env->sr[i]; |
| if (sr & 0x80000000) { |
| qemu_printf("%02d T=%d Ks=%d Kp=%d BUID=0x%03x " |
| "CNTLR_SPEC=0x%05x\n", i, |
| sr & 0x80000000 ? 1 : 0, sr & 0x40000000 ? 1 : 0, |
| sr & 0x20000000 ? 1 : 0, (uint32_t)((sr >> 20) & 0x1FF), |
| (uint32_t)(sr & 0xFFFFF)); |
| } else { |
| qemu_printf("%02d T=%d Ks=%d Kp=%d N=%d VSID=0x%06x\n", i, |
| sr & 0x80000000 ? 1 : 0, sr & 0x40000000 ? 1 : 0, |
| sr & 0x20000000 ? 1 : 0, sr & 0x10000000 ? 1 : 0, |
| (uint32_t)(sr & 0x00FFFFFF)); |
| } |
| } |
| |
| qemu_printf("\nBATs:\n"); |
| mmu6xx_dump_BATs(env, ACCESS_INT); |
| mmu6xx_dump_BATs(env, ACCESS_CODE); |
| |
| if (env->id_tlbs != 1) { |
| qemu_printf("ERROR: 6xx MMU should have separated TLB" |
| " for code and data\n"); |
| } |
| |
| qemu_printf("\nTLBs [EPN EPN + SIZE]\n"); |
| |
| for (type = 0; type < 2; type++) { |
| for (way = 0; way < env->nb_ways; way++) { |
| for (entry = env->nb_tlb * type + env->tlb_per_way * way; |
| entry < (env->nb_tlb * type + env->tlb_per_way * (way + 1)); |
| entry++) { |
| |
| tlb = &env->tlb.tlb6[entry]; |
| qemu_printf("%s TLB %02d/%02d way:%d %s [" |
| TARGET_FMT_lx " " TARGET_FMT_lx "]\n", |
| type ? "code" : "data", entry % env->nb_tlb, |
| env->nb_tlb, way, |
| pte_is_valid(tlb->pte0) ? "valid" : "inval", |
| tlb->EPN, tlb->EPN + TARGET_PAGE_SIZE); |
| } |
| } |
| } |
| } |
| |
| void dump_mmu(CPUPPCState *env) |
| { |
| switch (env->mmu_model) { |
| case POWERPC_MMU_BOOKE: |
| mmubooke_dump_mmu(env); |
| break; |
| case POWERPC_MMU_BOOKE206: |
| mmubooke206_dump_mmu(env); |
| break; |
| case POWERPC_MMU_SOFT_6xx: |
| mmu6xx_dump_mmu(env); |
| break; |
| #if defined(TARGET_PPC64) |
| case POWERPC_MMU_64B: |
| case POWERPC_MMU_2_03: |
| case POWERPC_MMU_2_06: |
| case POWERPC_MMU_2_07: |
| dump_slb(env_archcpu(env)); |
| break; |
| case POWERPC_MMU_3_00: |
| if (ppc64_v3_radix(env_archcpu(env))) { |
| qemu_log_mask(LOG_UNIMP, "%s: the PPC64 MMU is unsupported\n", |
| __func__); |
| } else { |
| dump_slb(env_archcpu(env)); |
| } |
| break; |
| #endif |
| default: |
| qemu_log_mask(LOG_UNIMP, "%s: unimplemented\n", __func__); |
| } |
| } |
| |
| static void booke206_update_mas_tlb_miss(CPUPPCState *env, target_ulong address, |
| MMUAccessType access_type, int mmu_idx) |
| { |
| uint32_t epid; |
| bool as, pr; |
| uint32_t missed_tid = 0; |
| bool use_epid = mmubooke206_get_as(env, mmu_idx, &epid, &as, &pr); |
| |
| if (access_type == MMU_INST_FETCH) { |
| as = FIELD_EX64(env->msr, MSR, IR); |
| } |
| env->spr[SPR_BOOKE_MAS0] = env->spr[SPR_BOOKE_MAS4] & MAS4_TLBSELD_MASK; |
| env->spr[SPR_BOOKE_MAS1] = env->spr[SPR_BOOKE_MAS4] & MAS4_TSIZED_MASK; |
| env->spr[SPR_BOOKE_MAS2] = env->spr[SPR_BOOKE_MAS4] & MAS4_WIMGED_MASK; |
| env->spr[SPR_BOOKE_MAS3] = 0; |
| env->spr[SPR_BOOKE_MAS6] = 0; |
| env->spr[SPR_BOOKE_MAS7] = 0; |
| |
| /* AS */ |
| if (as) { |
| env->spr[SPR_BOOKE_MAS1] |= MAS1_TS; |
| env->spr[SPR_BOOKE_MAS6] |= MAS6_SAS; |
| } |
| |
| env->spr[SPR_BOOKE_MAS1] |= MAS1_VALID; |
| env->spr[SPR_BOOKE_MAS2] |= address & MAS2_EPN_MASK; |
| |
| if (!use_epid) { |
| switch (env->spr[SPR_BOOKE_MAS4] & MAS4_TIDSELD_PIDZ) { |
| case MAS4_TIDSELD_PID0: |
| missed_tid = env->spr[SPR_BOOKE_PID]; |
| break; |
| case MAS4_TIDSELD_PID1: |
| missed_tid = env->spr[SPR_BOOKE_PID1]; |
| break; |
| case MAS4_TIDSELD_PID2: |
| missed_tid = env->spr[SPR_BOOKE_PID2]; |
| break; |
| } |
| env->spr[SPR_BOOKE_MAS6] |= env->spr[SPR_BOOKE_PID] << 16; |
| } else { |
| missed_tid = epid; |
| env->spr[SPR_BOOKE_MAS6] |= missed_tid << 16; |
| } |
| env->spr[SPR_BOOKE_MAS1] |= (missed_tid << MAS1_TID_SHIFT); |
| |
| |
| /* next victim logic */ |
| env->spr[SPR_BOOKE_MAS0] |= env->last_way << MAS0_ESEL_SHIFT; |
| env->last_way++; |
| env->last_way &= booke206_tlb_ways(env, 0) - 1; |
| env->spr[SPR_BOOKE_MAS0] |= env->last_way << MAS0_NV_SHIFT; |
| } |
| |
| static bool ppc_booke_xlate(PowerPCCPU *cpu, vaddr eaddr, |
| MMUAccessType access_type, |
| hwaddr *raddrp, int *psizep, int *protp, |
| int mmu_idx, bool guest_visible) |
| { |
| CPUState *cs = CPU(cpu); |
| CPUPPCState *env = &cpu->env; |
| hwaddr raddr; |
| int prot, ret; |
| |
| if (env->mmu_model == POWERPC_MMU_BOOKE206) { |
| ret = mmubooke206_get_physical_address(env, &raddr, &prot, eaddr, |
| access_type, mmu_idx); |
| } else { |
| ret = mmubooke_get_physical_address(env, &raddr, &prot, eaddr, |
| access_type); |
| } |
| if (ret == 0) { |
| *raddrp = raddr; |
| *protp = prot; |
| *psizep = TARGET_PAGE_BITS; |
| return true; |
| } else if (!guest_visible) { |
| return false; |
| } |
| |
| log_cpu_state_mask(CPU_LOG_MMU, cs, 0); |
| env->error_code = 0; |
| switch (ret) { |
| case -1: |
| /* No matches in page tables or TLB */ |
| if (env->mmu_model == POWERPC_MMU_BOOKE206) { |
| booke206_update_mas_tlb_miss(env, eaddr, access_type, mmu_idx); |
| } |
| cs->exception_index = (access_type == MMU_INST_FETCH) ? |
| POWERPC_EXCP_ITLB : POWERPC_EXCP_DTLB; |
| env->spr[SPR_BOOKE_DEAR] = eaddr; |
| env->spr[SPR_BOOKE_ESR] = mmubooke206_esr(mmu_idx, access_type); |
| break; |
| case -2: |
| /* Access rights violation */ |
| cs->exception_index = (access_type == MMU_INST_FETCH) ? |
| POWERPC_EXCP_ISI : POWERPC_EXCP_DSI; |
| if (access_type != MMU_INST_FETCH) { |
| env->spr[SPR_BOOKE_DEAR] = eaddr; |
| env->spr[SPR_BOOKE_ESR] = mmubooke206_esr(mmu_idx, access_type); |
| } |
| break; |
| case -3: |
| /* No execute protection violation */ |
| cs->exception_index = POWERPC_EXCP_ISI; |
| env->spr[SPR_BOOKE_ESR] = 0; |
| break; |
| } |
| |
| return false; |
| } |
| |
| static bool ppc_real_mode_xlate(PowerPCCPU *cpu, vaddr eaddr, |
| MMUAccessType access_type, |
| hwaddr *raddrp, int *psizep, int *protp) |
| { |
| CPUPPCState *env = &cpu->env; |
| |
| if (access_type == MMU_INST_FETCH ? !FIELD_EX64(env->msr, MSR, IR) |
| : !FIELD_EX64(env->msr, MSR, DR)) { |
| *raddrp = eaddr; |
| *protp = PAGE_RWX; |
| *psizep = TARGET_PAGE_BITS; |
| return true; |
| } else if (env->mmu_model == POWERPC_MMU_REAL) { |
| cpu_abort(CPU(cpu), "PowerPC in real mode shold not do translation\n"); |
| } |
| return false; |
| } |
| |
| static bool ppc_40x_xlate(PowerPCCPU *cpu, vaddr eaddr, |
| MMUAccessType access_type, |
| hwaddr *raddrp, int *psizep, int *protp, |
| int mmu_idx, bool guest_visible) |
| { |
| CPUState *cs = CPU(cpu); |
| CPUPPCState *env = &cpu->env; |
| int ret; |
| |
| if (ppc_real_mode_xlate(cpu, eaddr, access_type, raddrp, psizep, protp)) { |
| return true; |
| } |
| |
| ret = mmu40x_get_physical_address(env, raddrp, protp, eaddr, access_type); |
| if (ret == 0) { |
| *psizep = TARGET_PAGE_BITS; |
| return true; |
| } else if (!guest_visible) { |
| return false; |
| } |
| |
| log_cpu_state_mask(CPU_LOG_MMU, cs, 0); |
| if (access_type == MMU_INST_FETCH) { |
| switch (ret) { |
| case -1: |
| /* No matches in page tables or TLB */ |
| cs->exception_index = POWERPC_EXCP_ITLB; |
| env->error_code = 0; |
| env->spr[SPR_40x_DEAR] = eaddr; |
| env->spr[SPR_40x_ESR] = 0x00000000; |
| break; |
| case -2: |
| /* Access rights violation */ |
| cs->exception_index = POWERPC_EXCP_ISI; |
| env->error_code = 0x08000000; |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } else { |
| switch (ret) { |
| case -1: |
| /* No matches in page tables or TLB */ |
| cs->exception_index = POWERPC_EXCP_DTLB; |
| env->error_code = 0; |
| env->spr[SPR_40x_DEAR] = eaddr; |
| if (access_type == MMU_DATA_STORE) { |
| env->spr[SPR_40x_ESR] = 0x00800000; |
| } else { |
| env->spr[SPR_40x_ESR] = 0x00000000; |
| } |
| break; |
| case -2: |
| /* Access rights violation */ |
| cs->exception_index = POWERPC_EXCP_DSI; |
| env->error_code = 0; |
| env->spr[SPR_40x_DEAR] = eaddr; |
| if (access_type == MMU_DATA_STORE) { |
| env->spr[SPR_40x_ESR] |= 0x00800000; |
| } |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| return false; |
| } |
| |
| static bool ppc_6xx_xlate(PowerPCCPU *cpu, vaddr eaddr, |
| MMUAccessType access_type, |
| hwaddr *raddrp, int *psizep, int *protp, |
| int mmu_idx, bool guest_visible) |
| { |
| CPUState *cs = CPU(cpu); |
| CPUPPCState *env = &cpu->env; |
| mmu_ctx_t ctx; |
| int type; |
| int ret; |
| |
| if (ppc_real_mode_xlate(cpu, eaddr, access_type, raddrp, psizep, protp)) { |
| return true; |
| } |
| |
| if (access_type == MMU_INST_FETCH) { |
| /* code access */ |
| type = ACCESS_CODE; |
| } else if (guest_visible) { |
| /* data access */ |
| type = env->access_type; |
| } else { |
| type = ACCESS_INT; |
| } |
| |
| ctx.prot = 0; |
| ctx.hash[0] = 0; |
| ctx.hash[1] = 0; |
| ret = mmu6xx_get_physical_address(env, &ctx, eaddr, access_type, type); |
| if (ret == 0) { |
| *raddrp = ctx.raddr; |
| *protp = ctx.prot; |
| *psizep = TARGET_PAGE_BITS; |
| return true; |
| } else if (!guest_visible) { |
| return false; |
| } |
| |
| log_cpu_state_mask(CPU_LOG_MMU, cs, 0); |
| if (type == ACCESS_CODE) { |
| switch (ret) { |
| case -1: |
| /* No matches in page tables or TLB */ |
| cs->exception_index = POWERPC_EXCP_IFTLB; |
| env->error_code = 1 << 18; |
| env->spr[SPR_IMISS] = eaddr; |
| env->spr[SPR_ICMP] = 0x80000000 | ctx.ptem; |
| goto tlb_miss; |
| case -2: |
| /* Access rights violation */ |
| cs->exception_index = POWERPC_EXCP_ISI; |
| env->error_code = 0x08000000; |
| break; |
| case -3: |
| /* No execute protection violation */ |
| cs->exception_index = POWERPC_EXCP_ISI; |
| env->error_code = 0x10000000; |
| break; |
| case -4: |
| /* Direct store exception */ |
| /* No code fetch is allowed in direct-store areas */ |
| cs->exception_index = POWERPC_EXCP_ISI; |
| env->error_code = 0x10000000; |
| break; |
| } |
| } else { |
| switch (ret) { |
| case -1: |
| /* No matches in page tables or TLB */ |
| if (access_type == MMU_DATA_STORE) { |
| cs->exception_index = POWERPC_EXCP_DSTLB; |
| env->error_code = 1 << 16; |
| } else { |
| cs->exception_index = POWERPC_EXCP_DLTLB; |
| env->error_code = 0; |
| } |
| env->spr[SPR_DMISS] = eaddr; |
| env->spr[SPR_DCMP] = 0x80000000 | ctx.ptem; |
| tlb_miss: |
| env->error_code |= ctx.key << 19; |
| env->spr[SPR_HASH1] = ppc_hash32_hpt_base(cpu) + |
| get_pteg_offset32(cpu, ctx.hash[0]); |
| env->spr[SPR_HASH2] = ppc_hash32_hpt_base(cpu) + |
| get_pteg_offset32(cpu, ctx.hash[1]); |
| break; |
| case -2: |
| /* Access rights violation */ |
| cs->exception_index = POWERPC_EXCP_DSI; |
| env->error_code = 0; |
| env->spr[SPR_DAR] = eaddr; |
| if (access_type == MMU_DATA_STORE) { |
| env->spr[SPR_DSISR] = 0x0A000000; |
| } else { |
| env->spr[SPR_DSISR] = 0x08000000; |
| } |
| break; |
| case -4: |
| /* Direct store exception */ |
| switch (type) { |
| case ACCESS_FLOAT: |
| /* Floating point load/store */ |
| cs->exception_index = POWERPC_EXCP_ALIGN; |
| env->error_code = POWERPC_EXCP_ALIGN_FP; |
| env->spr[SPR_DAR] = eaddr; |
| break; |
| case ACCESS_RES: |
| /* lwarx, ldarx or stwcx. */ |
| cs->exception_index = POWERPC_EXCP_DSI; |
| env->error_code = 0; |
| env->spr[SPR_DAR] = eaddr; |
| if (access_type == MMU_DATA_STORE) { |
| env->spr[SPR_DSISR] = 0x06000000; |
| } else { |
| env->spr[SPR_DSISR] = 0x04000000; |
| } |
| break; |
| case ACCESS_EXT: |
| /* eciwx or ecowx */ |
| cs->exception_index = POWERPC_EXCP_DSI; |
| env->error_code = 0; |
| env->spr[SPR_DAR] = eaddr; |
| if (access_type == MMU_DATA_STORE) { |
| env->spr[SPR_DSISR] = 0x06100000; |
| } else { |
| env->spr[SPR_DSISR] = 0x04100000; |
| } |
| break; |
| default: |
| printf("DSI: invalid exception (%d)\n", ret); |
| cs->exception_index = POWERPC_EXCP_PROGRAM; |
| env->error_code = POWERPC_EXCP_INVAL | POWERPC_EXCP_INVAL_INVAL; |
| env->spr[SPR_DAR] = eaddr; |
| break; |
| } |
| break; |
| } |
| } |
| return false; |
| } |
| |
| /*****************************************************************************/ |
| |
| bool ppc_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type, |
| hwaddr *raddrp, int *psizep, int *protp, |
| int mmu_idx, bool guest_visible) |
| { |
| switch (cpu->env.mmu_model) { |
| #if defined(TARGET_PPC64) |
| case POWERPC_MMU_3_00: |
| if (ppc64_v3_radix(cpu)) { |
| return ppc_radix64_xlate(cpu, eaddr, access_type, raddrp, |
| psizep, protp, mmu_idx, guest_visible); |
| } |
| /* fall through */ |
| case POWERPC_MMU_64B: |
| case POWERPC_MMU_2_03: |
| case POWERPC_MMU_2_06: |
| case POWERPC_MMU_2_07: |
| return ppc_hash64_xlate(cpu, eaddr, access_type, |
| raddrp, psizep, protp, mmu_idx, guest_visible); |
| #endif |
| |
| case POWERPC_MMU_32B: |
| return ppc_hash32_xlate(cpu, eaddr, access_type, raddrp, |
| psizep, protp, mmu_idx, guest_visible); |
| case POWERPC_MMU_BOOKE: |
| case POWERPC_MMU_BOOKE206: |
| return ppc_booke_xlate(cpu, eaddr, access_type, raddrp, |
| psizep, protp, mmu_idx, guest_visible); |
| case POWERPC_MMU_SOFT_4xx: |
| return ppc_40x_xlate(cpu, eaddr, access_type, raddrp, |
| psizep, protp, mmu_idx, guest_visible); |
| case POWERPC_MMU_SOFT_6xx: |
| return ppc_6xx_xlate(cpu, eaddr, access_type, raddrp, |
| psizep, protp, mmu_idx, guest_visible); |
| case POWERPC_MMU_REAL: |
| return ppc_real_mode_xlate(cpu, eaddr, access_type, raddrp, psizep, |
| protp); |
| case POWERPC_MMU_MPC8xx: |
| cpu_abort(env_cpu(&cpu->env), "MPC8xx MMU model is not implemented\n"); |
| default: |
| cpu_abort(CPU(cpu), "Unknown or invalid MMU model\n"); |
| } |
| } |
| |
| hwaddr ppc_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) |
| { |
| PowerPCCPU *cpu = POWERPC_CPU(cs); |
| hwaddr raddr; |
| int s, p; |
| |
| /* |
| * Some MMUs have separate TLBs for code and data. If we only |
| * try an MMU_DATA_LOAD, we may not be able to read instructions |
| * mapped by code TLBs, so we also try a MMU_INST_FETCH. |
| */ |
| if (ppc_xlate(cpu, addr, MMU_DATA_LOAD, &raddr, &s, &p, |
| ppc_env_mmu_index(&cpu->env, false), false) || |
| ppc_xlate(cpu, addr, MMU_INST_FETCH, &raddr, &s, &p, |
| ppc_env_mmu_index(&cpu->env, true), false)) { |
| return raddr & TARGET_PAGE_MASK; |
| } |
| return -1; |
| } |
