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[110.175.65.7]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-682227f1838sm87041a12.46.2024.05.23.16.11.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 May 2024 16:11:35 -0700 (PDT) From: Nicholas Piggin To: qemu-devel@nongnu.org Cc: Nicholas Piggin , qemu-ppc@nongnu.org, BALATON Zoltan Subject: [PULL 71/72] target/ppc: Move out BookE and related MMU functions from mmu_common.c Date: Fri, 24 May 2024 09:07:44 +1000 Message-ID: <20240523230747.45703-72-npiggin@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240523230747.45703-1-npiggin@gmail.com> References: <20240523230747.45703-1-npiggin@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::42d; envelope-from=npiggin@gmail.com; helo=mail-pf1-x42d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-ppc@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-ppc-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-ppc-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: BALATON Zoltan Add a new mmu-booke.c file for BookE and related MMU bits from mmu_common.c. Acked-by: Nicholas Piggin Signed-off-by: BALATON Zoltan Signed-off-by: Nicholas Piggin --- target/ppc/cpu.h | 4 - target/ppc/meson.build | 1 + target/ppc/mmu-booke.c | 531 ++++++++++++++++++++++++++++++++++++++++ target/ppc/mmu-booke.h | 17 ++ target/ppc/mmu_common.c | 507 +------------------------------------- target/ppc/mmu_helper.c | 1 + 6 files changed, 551 insertions(+), 510 deletions(-) create mode 100644 target/ppc/mmu-booke.c create mode 100644 target/ppc/mmu-booke.h diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index 95cc11dff7..2015e603d4 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -1642,10 +1642,6 @@ void ppc_tlb_invalidate_all(CPUPPCState *env); void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr); void cpu_ppc_set_vhyp(PowerPCCPU *cpu, PPCVirtualHypervisor *vhyp); void cpu_ppc_set_1lpar(PowerPCCPU *cpu); -int ppcmas_tlb_check(CPUPPCState *env, ppcmas_tlb_t *tlb, hwaddr *raddrp, - target_ulong address, uint32_t pid); -int ppcemb_tlb_search(CPUPPCState *env, target_ulong address, uint32_t pid); -hwaddr booke206_tlb_to_page_size(CPUPPCState *env, ppcmas_tlb_t *tlb); #endif void ppc_store_fpscr(CPUPPCState *env, target_ulong val); diff --git a/target/ppc/meson.build b/target/ppc/meson.build index 0b89f9b89f..db3b7a0c33 100644 --- a/target/ppc/meson.build +++ b/target/ppc/meson.build @@ -37,6 +37,7 @@ ppc_system_ss.add(files( 'arch_dump.c', 'machine.c', 'mmu-hash32.c', + 'mmu-booke.c', 'mmu_common.c', 'ppc-qmp-cmds.c', )) diff --git a/target/ppc/mmu-booke.c b/target/ppc/mmu-booke.c new file mode 100644 index 0000000000..55e5dd7c6b --- /dev/null +++ b/target/ppc/mmu-booke.c @@ -0,0 +1,531 @@ +/* + * PowerPC BookE MMU, TLB 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 . + */ + +#include "qemu/osdep.h" +#include "exec/page-protection.h" +#include "exec/log.h" +#include "cpu.h" +#include "internal.h" +#include "mmu-booke.h" + +/* 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; +} + +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; + if (check_prot_access_type(*prot, access_type)) { + ret = 0; + } else { + env->spr[SPR_40x_ESR] = 0; + ret = -2; + } + 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 (check_prot_access_type(*prot, 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 (check_prot_access_type(*prot, 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 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; +} + +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; +} diff --git a/target/ppc/mmu-booke.h b/target/ppc/mmu-booke.h new file mode 100644 index 0000000000..f972843bbb --- /dev/null +++ b/target/ppc/mmu-booke.h @@ -0,0 +1,17 @@ +#ifndef PPC_MMU_BOOKE_H +#define PPC_MMU_BOOKE_H + +#include "cpu.h" + +int ppcemb_tlb_search(CPUPPCState *env, target_ulong address, uint32_t pid); +int mmu40x_get_physical_address(CPUPPCState *env, hwaddr *raddr, int *prot, + target_ulong address, + MMUAccessType access_type); +hwaddr booke206_tlb_to_page_size(CPUPPCState *env, ppcmas_tlb_t *tlb); +int ppcmas_tlb_check(CPUPPCState *env, ppcmas_tlb_t *tlb, hwaddr *raddrp, + target_ulong address, uint32_t pid); +bool ppc_booke_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type, + hwaddr *raddrp, int *psizep, int *protp, int mmu_idx, + bool guest_visible); + +#endif diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c index 5414a14aad..2c75e53250 100644 --- a/target/ppc/mmu_common.c +++ b/target/ppc/mmu_common.c @@ -33,6 +33,7 @@ #include "internal.h" #include "mmu-book3s-v3.h" #include "mmu-radix64.h" +#include "mmu-booke.h" /* #define DUMP_PAGE_TABLES */ @@ -484,401 +485,6 @@ static int mmu6xx_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx, 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; - if (check_prot_access_type(*prot, access_type)) { - ret = 0; - } else { - env->spr[SPR_40x_ESR] = 0; - ret = -2; - } - 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 (check_prot_access_type(*prot, 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 (check_prot_access_type(*prot, 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", @@ -1117,117 +723,6 @@ void dump_mmu(CPUPPCState *env) } } -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, diff --git a/target/ppc/mmu_helper.c b/target/ppc/mmu_helper.c index 238407a7f1..b0a0676beb 100644 --- a/target/ppc/mmu_helper.c +++ b/target/ppc/mmu_helper.c @@ -33,6 +33,7 @@ #include "internal.h" #include "mmu-book3s-v3.h" #include "mmu-radix64.h" +#include "mmu-booke.h" #include "exec/helper-proto.h" #include "exec/cpu_ldst.h"