/* * 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 . */ #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/log.h" #include "helper_regs.h" #include "qemu/error-report.h" #include "qemu/main-loop.h" #include "qemu/qemu-print.h" #include "internal.h" #include "mmu-book3s-v3.h" #include "mmu-radix64.h" #include "exec/helper-proto.h" #include "exec/cpu_ldst.h" /* #define DEBUG_BATS */ /* #define DEBUG_SOFTWARE_TLB */ /* #define DUMP_PAGE_TABLES */ /* #define FLUSH_ALL_TLBS */ #ifdef DEBUG_SOFTWARE_TLB # define LOG_SWTLB(...) qemu_log_mask(CPU_LOG_MMU, __VA_ARGS__) #else # define LOG_SWTLB(...) do { } while (0) #endif #ifdef DEBUG_BATS # define LOG_BATS(...) qemu_log_mask(CPU_LOG_MMU, __VA_ARGS__) #else # define LOG_BATS(...) do { } while (0) #endif /*****************************************************************************/ /* PowerPC MMU emulation */ /* Software driven TLB helpers */ static inline void ppc6xx_tlb_invalidate_all(CPUPPCState *env) { ppc6xx_tlb_t *tlb; int nr, max; /* LOG_SWTLB("Invalidate all TLBs\n"); */ /* 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.tlb6[nr]; pte_invalidate(&tlb->pte0); } tlb_flush(env_cpu(env)); } static inline void ppc6xx_tlb_invalidate_virt2(CPUPPCState *env, target_ulong eaddr, int is_code, int match_epn) { #if !defined(FLUSH_ALL_TLBS) CPUState *cs = env_cpu(env); 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.tlb6[nr]; if (pte_is_valid(tlb->pte0) && (match_epn == 0 || eaddr == tlb->EPN)) { LOG_SWTLB("TLB invalidate %d/%d " TARGET_FMT_lx "\n", nr, env->nb_tlb, eaddr); pte_invalidate(&tlb->pte0); tlb_flush_page(cs, tlb->EPN); } } #else /* XXX: PowerPC specification say this is valid as well */ ppc6xx_tlb_invalidate_all(env); #endif } static inline void ppc6xx_tlb_invalidate_virt(CPUPPCState *env, target_ulong eaddr, int is_code) { ppc6xx_tlb_invalidate_virt2(env, eaddr, is_code, 0); } static void ppc6xx_tlb_store(CPUPPCState *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.tlb6[nr]; LOG_SWTLB("Set TLB %d/%d EPN " TARGET_FMT_lx " PTE0 " TARGET_FMT_lx " PTE1 " TARGET_FMT_lx "\n", nr, env->nb_tlb, EPN, pte0, pte1); /* Invalidate any pending reference in QEMU for this virtual address */ ppc6xx_tlb_invalidate_virt2(env, EPN, is_code, 1); tlb->pte0 = pte0; tlb->pte1 = pte1; tlb->EPN = EPN; /* Store last way for LRU mechanism */ env->last_way = way; } /* Generic TLB search function for PowerPC embedded implementations */ static int ppcemb_tlb_search(CPUPPCState *env, target_ulong address, uint32_t pid) { ppcemb_tlb_t *tlb; hwaddr raddr; int i, ret; /* Default return value is no match */ ret = -1; for (i = 0; i < env->nb_tlb; i++) { tlb = &env->tlb.tlbe[i]; if (ppcemb_tlb_check(env, tlb, &raddr, address, pid, 0, i) == 0) { ret = i; break; } } return ret; } /* Helpers specific to PowerPC 40x implementations */ static inline void ppc4xx_tlb_invalidate_all(CPUPPCState *env) { ppcemb_tlb_t *tlb; int i; for (i = 0; i < env->nb_tlb; i++) { tlb = &env->tlb.tlbe[i]; tlb->prot &= ~PAGE_VALID; } tlb_flush(env_cpu(env)); } static void booke206_flush_tlb(CPUPPCState *env, int flags, const int check_iprot) { int tlb_size; int i, j; ppcmas_tlb_t *tlb = env->tlb.tlbm; for (i = 0; i < BOOKE206_MAX_TLBN; i++) { if (flags & (1 << i)) { tlb_size = booke206_tlb_size(env, i); for (j = 0; j < tlb_size; j++) { if (!check_iprot || !(tlb[j].mas1 & MAS1_IPROT)) { tlb[j].mas1 &= ~MAS1_VALID; } } } tlb += booke206_tlb_size(env, i); } tlb_flush(env_cpu(env)); } static int get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx, target_ulong eaddr, MMUAccessType access_type, int type) { return get_physical_address_wtlb(env, ctx, eaddr, access_type, type, 0); } /*****************************************************************************/ /* BATs management */ #if !defined(FLUSH_ALL_TLBS) static inline void do_invalidate_BAT(CPUPPCState *env, target_ulong BATu, target_ulong mask) { CPUState *cs = env_cpu(env); target_ulong base, end, page; base = BATu & ~0x0001FFFF; end = base + mask + 0x00020000; if (((end - base) >> TARGET_PAGE_BITS) > 1024) { /* Flushing 1024 4K pages is slower than a complete flush */ LOG_BATS("Flush all BATs\n"); tlb_flush(cs); LOG_BATS("Flush done\n"); return; } LOG_BATS("Flush BAT from " TARGET_FMT_lx " to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n", base, end, mask); for (page = base; page != end; page += TARGET_PAGE_SIZE) { tlb_flush_page(cs, page); } LOG_BATS("Flush done\n"); } #endif static inline void dump_store_bat(CPUPPCState *env, char ID, int ul, int nr, target_ulong value) { LOG_BATS("Set %cBAT%d%c to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n", ID, nr, ul == 0 ? 'u' : 'l', value, env->nip); } void helper_store_ibatu(CPUPPCState *env, uint32_t 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_cpu(env)); #endif } } void helper_store_ibatl(CPUPPCState *env, uint32_t nr, target_ulong value) { dump_store_bat(env, 'I', 1, nr, value); env->IBAT[1][nr] = value; } void helper_store_dbatu(CPUPPCState *env, uint32_t 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_cpu(env)); #endif } } void helper_store_dbatl(CPUPPCState *env, uint32_t nr, target_ulong value) { dump_store_bat(env, 'D', 1, nr, value); env->DBAT[1][nr] = value; } void helper_store_601_batu(CPUPPCState *env, uint32_t nr, target_ulong value) { target_ulong mask; #if defined(FLUSH_ALL_TLBS) int do_inval; #endif dump_store_bat(env, 'I', 0, nr, value); if (env->IBAT[0][nr] != value) { #if defined(FLUSH_ALL_TLBS) do_inval = 0; #endif mask = (env->IBAT[1][nr] << 17) & 0x0FFE0000UL; if (env->IBAT[1][nr] & 0x40) { /* Invalidate BAT only if it is valid */ #if !defined(FLUSH_ALL_TLBS) do_invalidate_BAT(env, env->IBAT[0][nr], mask); #else do_inval = 1; #endif } /* * When storing valid upper BAT, mask BEPI and BRPN and * invalidate all TLBs covered by this BAT */ env->IBAT[0][nr] = (value & 0x00001FFFUL) | (value & ~0x0001FFFFUL & ~mask); env->DBAT[0][nr] = env->IBAT[0][nr]; if (env->IBAT[1][nr] & 0x40) { #if !defined(FLUSH_ALL_TLBS) do_invalidate_BAT(env, env->IBAT[0][nr], mask); #else do_inval = 1; #endif } #if defined(FLUSH_ALL_TLBS) if (do_inval) { tlb_flush(env_cpu(env)); } #endif } } void helper_store_601_batl(CPUPPCState *env, uint32_t nr, target_ulong value) { #if !defined(FLUSH_ALL_TLBS) target_ulong mask; #else int do_inval; #endif dump_store_bat(env, 'I', 1, nr, value); if (env->IBAT[1][nr] != value) { #if defined(FLUSH_ALL_TLBS) do_inval = 0; #endif if (env->IBAT[1][nr] & 0x40) { #if !defined(FLUSH_ALL_TLBS) mask = (env->IBAT[1][nr] << 17) & 0x0FFE0000UL; do_invalidate_BAT(env, env->IBAT[0][nr], mask); #else do_inval = 1; #endif } if (value & 0x40) { #if !defined(FLUSH_ALL_TLBS) mask = (value << 17) & 0x0FFE0000UL; do_invalidate_BAT(env, env->IBAT[0][nr], mask); #else do_inval = 1; #endif } env->IBAT[1][nr] = value; env->DBAT[1][nr] = value; #if defined(FLUSH_ALL_TLBS) if (do_inval) { tlb_flush(env_cpu(env)); } #endif } } /*****************************************************************************/ /* TLB management */ void ppc_tlb_invalidate_all(CPUPPCState *env) { #if defined(TARGET_PPC64) if (mmu_is_64bit(env->mmu_model)) { env->tlb_need_flush = 0; tlb_flush(env_cpu(env)); } else #endif /* defined(TARGET_PPC64) */ switch (env->mmu_model) { case POWERPC_MMU_SOFT_6xx: case POWERPC_MMU_SOFT_74xx: ppc6xx_tlb_invalidate_all(env); break; case POWERPC_MMU_SOFT_4xx: case POWERPC_MMU_SOFT_4xx_Z: ppc4xx_tlb_invalidate_all(env); break; case POWERPC_MMU_REAL: cpu_abort(env_cpu(env), "No TLB for PowerPC 4xx in real mode\n"); break; case POWERPC_MMU_MPC8xx: /* XXX: TODO */ cpu_abort(env_cpu(env), "MPC8xx MMU model is not implemented\n"); break; case POWERPC_MMU_BOOKE: tlb_flush(env_cpu(env)); break; case POWERPC_MMU_BOOKE206: booke206_flush_tlb(env, -1, 0); break; case POWERPC_MMU_32B: case POWERPC_MMU_601: env->tlb_need_flush = 0; tlb_flush(env_cpu(env)); break; default: /* XXX: TODO */ cpu_abort(env_cpu(env), "Unknown MMU model %x\n", env->mmu_model); break; } } void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr) { #if !defined(FLUSH_ALL_TLBS) addr &= TARGET_PAGE_MASK; #if defined(TARGET_PPC64) if (mmu_is_64bit(env->mmu_model)) { /* tlbie invalidate TLBs for all segments */ /* * XXX: given the fact that there are too many segments to invalidate, * and we still don't have a tlb_flush_mask(env, n, mask) in QEMU, * we just invalidate all TLBs */ env->tlb_need_flush |= TLB_NEED_LOCAL_FLUSH; } else #endif /* defined(TARGET_PPC64) */ switch (env->mmu_model) { case POWERPC_MMU_SOFT_6xx: case POWERPC_MMU_SOFT_74xx: ppc6xx_tlb_invalidate_virt(env, addr, 0); if (env->id_tlbs == 1) { ppc6xx_tlb_invalidate_virt(env, addr, 1); } break; case POWERPC_MMU_32B: case POWERPC_MMU_601: /* * Actual CPUs invalidate entire congruence classes based on * the geometry of their TLBs and some OSes take that into * account, we just mark the TLB to be flushed later (context * synchronizing event or sync instruction on 32-bit). */ env->tlb_need_flush |= TLB_NEED_LOCAL_FLUSH; break; default: /* Should never reach here with other MMU models */ assert(0); } #else ppc_tlb_invalidate_all(env); #endif } /*****************************************************************************/ /* Special registers manipulation */ /* Segment registers load and store */ target_ulong helper_load_sr(CPUPPCState *env, target_ulong sr_num) { #if defined(TARGET_PPC64) if (mmu_is_64bit(env->mmu_model)) { /* XXX */ return 0; } #endif return env->sr[sr_num]; } void helper_store_sr(CPUPPCState *env, target_ulong srnum, target_ulong value) { qemu_log_mask(CPU_LOG_MMU, "%s: reg=%d " TARGET_FMT_lx " " TARGET_FMT_lx "\n", __func__, (int)srnum, value, env->sr[srnum]); #if defined(TARGET_PPC64) if (mmu_is_64bit(env->mmu_model)) { PowerPCCPU *cpu = env_archcpu(env); uint64_t esid, vsid; /* ESID = srnum */ esid = ((uint64_t)(srnum & 0xf) << 28) | SLB_ESID_V; /* VSID = VSID */ vsid = (value & 0xfffffff) << 12; /* flags = flags */ vsid |= ((value >> 27) & 0xf) << 8; ppc_store_slb(cpu, srnum, esid, vsid); } else #endif if (env->sr[srnum] != value) { env->sr[srnum] = value; /* * Invalidating 256MB of virtual memory in 4kB pages is way * longer than flushing the whole TLB. */ #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_cpu(env), page); } } #else env->tlb_need_flush |= TLB_NEED_LOCAL_FLUSH; #endif } } /* TLB management */ void helper_tlbia(CPUPPCState *env) { ppc_tlb_invalidate_all(env); } void helper_tlbie(CPUPPCState *env, target_ulong addr) { ppc_tlb_invalidate_one(env, addr); } void helper_tlbiva(CPUPPCState *env, target_ulong addr) { /* tlbiva instruction only exists on BookE */ assert(env->mmu_model == POWERPC_MMU_BOOKE); /* XXX: TODO */ cpu_abort(env_cpu(env), "BookE MMU model is not implemented\n"); } /* Software driven TLBs management */ /* PowerPC 602/603 software TLB load instructions helpers */ static void do_6xx_tlb(CPUPPCState *env, target_ulong new_EPN, int is_code) { target_ulong RPN, CMP, EPN; int way; RPN = env->spr[SPR_RPA]; if (is_code) { CMP = env->spr[SPR_ICMP]; EPN = env->spr[SPR_IMISS]; } else { CMP = env->spr[SPR_DCMP]; EPN = env->spr[SPR_DMISS]; } way = (env->spr[SPR_SRR1] >> 17) & 1; (void)EPN; /* avoid a compiler warning */ LOG_SWTLB("%s: EPN " TARGET_FMT_lx " " TARGET_FMT_lx " PTE0 " TARGET_FMT_lx " PTE1 " TARGET_FMT_lx " way %d\n", __func__, new_EPN, EPN, CMP, RPN, way); /* Store this TLB */ ppc6xx_tlb_store(env, (uint32_t)(new_EPN & TARGET_PAGE_MASK), way, is_code, CMP, RPN); } void helper_6xx_tlbd(CPUPPCState *env, target_ulong EPN) { do_6xx_tlb(env, EPN, 0); } void helper_6xx_tlbi(CPUPPCState *env, target_ulong EPN) { do_6xx_tlb(env, EPN, 1); } /* PowerPC 74xx software TLB load instructions helpers */ static void do_74xx_tlb(CPUPPCState *env, target_ulong new_EPN, int is_code) { target_ulong RPN, CMP, EPN; int way; RPN = env->spr[SPR_PTELO]; CMP = env->spr[SPR_PTEHI]; EPN = env->spr[SPR_TLBMISS] & ~0x3; way = env->spr[SPR_TLBMISS] & 0x3; (void)EPN; /* avoid a compiler warning */ LOG_SWTLB("%s: EPN " TARGET_FMT_lx " " TARGET_FMT_lx " PTE0 " TARGET_FMT_lx " PTE1 " TARGET_FMT_lx " way %d\n", __func__, new_EPN, EPN, CMP, RPN, way); /* Store this TLB */ ppc6xx_tlb_store(env, (uint32_t)(new_EPN & TARGET_PAGE_MASK), way, is_code, CMP, RPN); } void helper_74xx_tlbd(CPUPPCState *env, target_ulong EPN) { do_74xx_tlb(env, EPN, 0); } void helper_74xx_tlbi(CPUPPCState *env, target_ulong EPN) { do_74xx_tlb(env, EPN, 1); } /*****************************************************************************/ /* PowerPC 601 specific instructions (POWER bridge) */ target_ulong helper_rac(CPUPPCState *env, target_ulong addr) { mmu_ctx_t ctx; int nb_BATs; target_ulong ret = 0; /* * We don't have to generate many instances of this instruction, * as rac is supervisor only. * * XXX: FIX THIS: Pretend we have no BAT */ nb_BATs = env->nb_BATs; env->nb_BATs = 0; if (get_physical_address(env, &ctx, addr, 0, ACCESS_INT) == 0) { ret = ctx.raddr; } env->nb_BATs = nb_BATs; return ret; } static inline target_ulong booke_tlb_to_page_size(int size) { return 1024 << (2 * size); } static inline int booke_page_size_to_tlb(target_ulong page_size) { int size; switch (page_size) { case 0x00000400UL: size = 0x0; break; case 0x00001000UL: size = 0x1; break; case 0x00004000UL: size = 0x2; break; case 0x00010000UL: size = 0x3; break; case 0x00040000UL: size = 0x4; break; case 0x00100000UL: size = 0x5; break; case 0x00400000UL: size = 0x6; break; case 0x01000000UL: size = 0x7; break; case 0x04000000UL: size = 0x8; break; case 0x10000000UL: size = 0x9; break; case 0x40000000UL: size = 0xA; break; #if defined(TARGET_PPC64) case 0x000100000000ULL: size = 0xB; break; case 0x000400000000ULL: size = 0xC; break; case 0x001000000000ULL: size = 0xD; break; case 0x004000000000ULL: size = 0xE; break; case 0x010000000000ULL: size = 0xF; break; #endif default: size = -1; break; } return size; } /* Helpers for 4xx TLB management */ #define PPC4XX_TLB_ENTRY_MASK 0x0000003f /* Mask for 64 TLB entries */ #define PPC4XX_TLBHI_V 0x00000040 #define PPC4XX_TLBHI_E 0x00000020 #define PPC4XX_TLBHI_SIZE_MIN 0 #define PPC4XX_TLBHI_SIZE_MAX 7 #define PPC4XX_TLBHI_SIZE_DEFAULT 1 #define PPC4XX_TLBHI_SIZE_SHIFT 7 #define PPC4XX_TLBHI_SIZE_MASK 0x00000007 #define PPC4XX_TLBLO_EX 0x00000200 #define PPC4XX_TLBLO_WR 0x00000100 #define PPC4XX_TLBLO_ATTR_MASK 0x000000FF #define PPC4XX_TLBLO_RPN_MASK 0xFFFFFC00 target_ulong helper_4xx_tlbre_hi(CPUPPCState *env, target_ulong entry) { ppcemb_tlb_t *tlb; target_ulong ret; int size; entry &= PPC4XX_TLB_ENTRY_MASK; tlb = &env->tlb.tlbe[entry]; ret = tlb->EPN; if (tlb->prot & PAGE_VALID) { ret |= PPC4XX_TLBHI_V; } size = booke_page_size_to_tlb(tlb->size); if (size < PPC4XX_TLBHI_SIZE_MIN || size > PPC4XX_TLBHI_SIZE_MAX) { size = PPC4XX_TLBHI_SIZE_DEFAULT; } ret |= size << PPC4XX_TLBHI_SIZE_SHIFT; env->spr[SPR_40x_PID] = tlb->PID; return ret; } target_ulong helper_4xx_tlbre_lo(CPUPPCState *env, target_ulong entry) { ppcemb_tlb_t *tlb; target_ulong ret; entry &= PPC4XX_TLB_ENTRY_MASK; tlb = &env->tlb.tlbe[entry]; ret = tlb->RPN; if (tlb->prot & PAGE_EXEC) { ret |= PPC4XX_TLBLO_EX; } if (tlb->prot & PAGE_WRITE) { ret |= PPC4XX_TLBLO_WR; } return ret; } void helper_4xx_tlbwe_hi(CPUPPCState *env, target_ulong entry, target_ulong val) { CPUState *cs = env_cpu(env); ppcemb_tlb_t *tlb; target_ulong page, end; LOG_SWTLB("%s entry %d val " TARGET_FMT_lx "\n", __func__, (int)entry, val); entry &= PPC4XX_TLB_ENTRY_MASK; tlb = &env->tlb.tlbe[entry]; /* Invalidate previous TLB (if it's valid) */ if (tlb->prot & PAGE_VALID) { end = tlb->EPN + tlb->size; LOG_SWTLB("%s: invalidate old TLB %d start " TARGET_FMT_lx " end " TARGET_FMT_lx "\n", __func__, (int)entry, tlb->EPN, end); for (page = tlb->EPN; page < end; page += TARGET_PAGE_SIZE) { tlb_flush_page(cs, page); } } tlb->size = booke_tlb_to_page_size((val >> PPC4XX_TLBHI_SIZE_SHIFT) & PPC4XX_TLBHI_SIZE_MASK); /* * We cannot handle TLB size < TARGET_PAGE_SIZE. * If this ever occurs, we should implement TARGET_PAGE_BITS_VARY */ if ((val & PPC4XX_TLBHI_V) && tlb->size < TARGET_PAGE_SIZE) { cpu_abort(cs, "TLB size " TARGET_FMT_lu " < %u " "are not supported (%d)\n" "Please implement TARGET_PAGE_BITS_VARY\n", tlb->size, TARGET_PAGE_SIZE, (int)((val >> 7) & 0x7)); } tlb->EPN = val & ~(tlb->size - 1); if (val & PPC4XX_TLBHI_V) { tlb->prot |= PAGE_VALID; if (val & PPC4XX_TLBHI_E) { /* XXX: TO BE FIXED */ cpu_abort(cs, "Little-endian TLB entries are not supported by now\n"); } } else { tlb->prot &= ~PAGE_VALID; } tlb->PID = env->spr[SPR_40x_PID]; /* PID */ LOG_SWTLB("%s: set up TLB %d RPN " TARGET_FMT_plx " EPN " TARGET_FMT_lx " size " TARGET_FMT_lx " prot %c%c%c%c PID %d\n", __func__, (int)entry, tlb->RPN, tlb->EPN, tlb->size, tlb->prot & PAGE_READ ? 'r' : '-', tlb->prot & PAGE_WRITE ? 'w' : '-', tlb->prot & PAGE_EXEC ? 'x' : '-', tlb->prot & PAGE_VALID ? 'v' : '-', (int)tlb->PID); /* Invalidate new TLB (if valid) */ if (tlb->prot & PAGE_VALID) { end = tlb->EPN + tlb->size; LOG_SWTLB("%s: invalidate TLB %d start " TARGET_FMT_lx " end " TARGET_FMT_lx "\n", __func__, (int)entry, tlb->EPN, end); for (page = tlb->EPN; page < end; page += TARGET_PAGE_SIZE) { tlb_flush_page(cs, page); } } } void helper_4xx_tlbwe_lo(CPUPPCState *env, target_ulong entry, target_ulong val) { ppcemb_tlb_t *tlb; LOG_SWTLB("%s entry %i val " TARGET_FMT_lx "\n", __func__, (int)entry, val); entry &= PPC4XX_TLB_ENTRY_MASK; tlb = &env->tlb.tlbe[entry]; tlb->attr = val & PPC4XX_TLBLO_ATTR_MASK; tlb->RPN = val & PPC4XX_TLBLO_RPN_MASK; tlb->prot = PAGE_READ; if (val & PPC4XX_TLBLO_EX) { tlb->prot |= PAGE_EXEC; } if (val & PPC4XX_TLBLO_WR) { tlb->prot |= PAGE_WRITE; } LOG_SWTLB("%s: set up TLB %d RPN " TARGET_FMT_plx " EPN " TARGET_FMT_lx " size " TARGET_FMT_lx " prot %c%c%c%c PID %d\n", __func__, (int)entry, tlb->RPN, tlb->EPN, tlb->size, tlb->prot & PAGE_READ ? 'r' : '-', tlb->prot & PAGE_WRITE ? 'w' : '-', tlb->prot & PAGE_EXEC ? 'x' : '-', tlb->prot & PAGE_VALID ? 'v' : '-', (int)tlb->PID); } target_ulong helper_4xx_tlbsx(CPUPPCState *env, target_ulong address) { return ppcemb_tlb_search(env, address, env->spr[SPR_40x_PID]); } /* PowerPC 440 TLB management */ void helper_440_tlbwe(CPUPPCState *env, uint32_t word, target_ulong entry, target_ulong value) { ppcemb_tlb_t *tlb; target_ulong EPN, RPN, size; int do_flush_tlbs; LOG_SWTLB("%s word %d entry %d value " TARGET_FMT_lx "\n", __func__, word, (int)entry, value); do_flush_tlbs = 0; entry &= 0x3F; tlb = &env->tlb.tlbe[entry]; switch (word) { default: /* Just here to please gcc */ case 0: EPN = value & 0xFFFFFC00; if ((tlb->prot & PAGE_VALID) && EPN != tlb->EPN) { do_flush_tlbs = 1; } tlb->EPN = EPN; size = booke_tlb_to_page_size((value >> 4) & 0xF); if ((tlb->prot & PAGE_VALID) && tlb->size < size) { do_flush_tlbs = 1; } tlb->size = size; tlb->attr &= ~0x1; tlb->attr |= (value >> 8) & 1; if (value & 0x200) { tlb->prot |= PAGE_VALID; } else { if (tlb->prot & PAGE_VALID) { tlb->prot &= ~PAGE_VALID; do_flush_tlbs = 1; } } tlb->PID = env->spr[SPR_440_MMUCR] & 0x000000FF; if (do_flush_tlbs) { tlb_flush(env_cpu(env)); } break; case 1: RPN = value & 0xFFFFFC0F; if ((tlb->prot & PAGE_VALID) && tlb->RPN != RPN) { tlb_flush(env_cpu(env)); } tlb->RPN = RPN; break; case 2: tlb->attr = (tlb->attr & 0x1) | (value & 0x0000FF00); tlb->prot = tlb->prot & PAGE_VALID; if (value & 0x1) { tlb->prot |= PAGE_READ << 4; } if (value & 0x2) { tlb->prot |= PAGE_WRITE << 4; } if (value & 0x4) { tlb->prot |= PAGE_EXEC << 4; } if (value & 0x8) { tlb->prot |= PAGE_READ; } if (value & 0x10) { tlb->prot |= PAGE_WRITE; } if (value & 0x20) { tlb->prot |= PAGE_EXEC; } break; } } target_ulong helper_440_tlbre(CPUPPCState *env, uint32_t word, target_ulong entry) { ppcemb_tlb_t *tlb; target_ulong ret; int size; entry &= 0x3F; tlb = &env->tlb.tlbe[entry]; switch (word) { default: /* Just here to please gcc */ case 0: ret = tlb->EPN; size = booke_page_size_to_tlb(tlb->size); if (size < 0 || size > 0xF) { size = 1; } ret |= size << 4; if (tlb->attr & 0x1) { ret |= 0x100; } if (tlb->prot & PAGE_VALID) { ret |= 0x200; } env->spr[SPR_440_MMUCR] &= ~0x000000FF; env->spr[SPR_440_MMUCR] |= tlb->PID; break; case 1: ret = tlb->RPN; break; case 2: ret = tlb->attr & ~0x1; if (tlb->prot & (PAGE_READ << 4)) { ret |= 0x1; } if (tlb->prot & (PAGE_WRITE << 4)) { ret |= 0x2; } if (tlb->prot & (PAGE_EXEC << 4)) { ret |= 0x4; } if (tlb->prot & PAGE_READ) { ret |= 0x8; } if (tlb->prot & PAGE_WRITE) { ret |= 0x10; } if (tlb->prot & PAGE_EXEC) { ret |= 0x20; } break; } return ret; } target_ulong helper_440_tlbsx(CPUPPCState *env, target_ulong address) { return ppcemb_tlb_search(env, address, env->spr[SPR_440_MMUCR] & 0xFF); } /* PowerPC BookE 2.06 TLB management */ static ppcmas_tlb_t *booke206_cur_tlb(CPUPPCState *env) { uint32_t tlbncfg = 0; int esel = (env->spr[SPR_BOOKE_MAS0] & MAS0_ESEL_MASK) >> MAS0_ESEL_SHIFT; int ea = (env->spr[SPR_BOOKE_MAS2] & MAS2_EPN_MASK); int tlb; tlb = (env->spr[SPR_BOOKE_MAS0] & MAS0_TLBSEL_MASK) >> MAS0_TLBSEL_SHIFT; tlbncfg = env->spr[SPR_BOOKE_TLB0CFG + tlb]; if ((tlbncfg & TLBnCFG_HES) && (env->spr[SPR_BOOKE_MAS0] & MAS0_HES)) { cpu_abort(env_cpu(env), "we don't support HES yet\n"); } return booke206_get_tlbm(env, tlb, ea, esel); } void helper_booke_setpid(CPUPPCState *env, uint32_t pidn, target_ulong pid) { env->spr[pidn] = pid; /* changing PIDs mean we're in a different address space now */ tlb_flush(env_cpu(env)); } void helper_booke_set_eplc(CPUPPCState *env, target_ulong val) { env->spr[SPR_BOOKE_EPLC] = val & EPID_MASK; tlb_flush_by_mmuidx(env_cpu(env), 1 << PPC_TLB_EPID_LOAD); } void helper_booke_set_epsc(CPUPPCState *env, target_ulong val) { env->spr[SPR_BOOKE_EPSC] = val & EPID_MASK; tlb_flush_by_mmuidx(env_cpu(env), 1 << PPC_TLB_EPID_STORE); } static inline void flush_page(CPUPPCState *env, ppcmas_tlb_t *tlb) { if (booke206_tlb_to_page_size(env, tlb) == TARGET_PAGE_SIZE) { tlb_flush_page(env_cpu(env), tlb->mas2 & MAS2_EPN_MASK); } else { tlb_flush(env_cpu(env)); } } void helper_booke206_tlbwe(CPUPPCState *env) { uint32_t tlbncfg, tlbn; ppcmas_tlb_t *tlb; uint32_t size_tlb, size_ps; target_ulong mask; switch (env->spr[SPR_BOOKE_MAS0] & MAS0_WQ_MASK) { case MAS0_WQ_ALWAYS: /* good to go, write that entry */ break; case MAS0_WQ_COND: /* XXX check if reserved */ if (0) { return; } break; case MAS0_WQ_CLR_RSRV: /* XXX clear entry */ return; default: /* no idea what to do */ return; } if (((env->spr[SPR_BOOKE_MAS0] & MAS0_ATSEL) == MAS0_ATSEL_LRAT) && !msr_gs) { /* XXX we don't support direct LRAT setting yet */ fprintf(stderr, "cpu: don't support LRAT setting yet\n"); return; } tlbn = (env->spr[SPR_BOOKE_MAS0] & MAS0_TLBSEL_MASK) >> MAS0_TLBSEL_SHIFT; tlbncfg = env->spr[SPR_BOOKE_TLB0CFG + tlbn]; tlb = booke206_cur_tlb(env); if (!tlb) { raise_exception_err_ra(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_INVAL | POWERPC_EXCP_INVAL_INVAL, GETPC()); } /* check that we support the targeted size */ size_tlb = (env->spr[SPR_BOOKE_MAS1] & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; size_ps = booke206_tlbnps(env, tlbn); if ((env->spr[SPR_BOOKE_MAS1] & MAS1_VALID) && (tlbncfg & TLBnCFG_AVAIL) && !(size_ps & (1 << size_tlb))) { raise_exception_err_ra(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_INVAL | POWERPC_EXCP_INVAL_INVAL, GETPC()); } if (msr_gs) { cpu_abort(env_cpu(env), "missing HV implementation\n"); } if (tlb->mas1 & MAS1_VALID) { /* * Invalidate the page in QEMU TLB if it was a valid entry. * * In "PowerPC e500 Core Family Reference Manual, Rev. 1", * Section "12.4.2 TLB Write Entry (tlbwe) Instruction": * (https://www.nxp.com/docs/en/reference-manual/E500CORERM.pdf) * * "Note that when an L2 TLB entry is written, it may be displacing an * already valid entry in the same L2 TLB location (a victim). If a * valid L1 TLB entry corresponds to the L2 MMU victim entry, that L1 * TLB entry is automatically invalidated." */ flush_page(env, tlb); } tlb->mas7_3 = ((uint64_t)env->spr[SPR_BOOKE_MAS7] << 32) | env->spr[SPR_BOOKE_MAS3]; tlb->mas1 = env->spr[SPR_BOOKE_MAS1]; if ((env->spr[SPR_MMUCFG] & MMUCFG_MAVN) == MMUCFG_MAVN_V2) { /* For TLB which has a fixed size TSIZE is ignored with MAV2 */ booke206_fixed_size_tlbn(env, tlbn, tlb); } else { if (!(tlbncfg & TLBnCFG_AVAIL)) { /* force !AVAIL TLB entries to correct page size */ tlb->mas1 &= ~MAS1_TSIZE_MASK; /* XXX can be configured in MMUCSR0 */ tlb->mas1 |= (tlbncfg & TLBnCFG_MINSIZE) >> 12; } } /* Make a mask from TLB size to discard invalid bits in EPN field */ mask = ~(booke206_tlb_to_page_size(env, tlb) - 1); /* Add a mask for page attributes */ mask |= MAS2_ACM | MAS2_VLE | MAS2_W | MAS2_I | MAS2_M | MAS2_G | MAS2_E; if (!msr_cm) { /* * Executing a tlbwe instruction in 32-bit mode will set bits * 0:31 of the TLB EPN field to zero. */ mask &= 0xffffffff; } tlb->mas2 = env->spr[SPR_BOOKE_MAS2] & mask; if (!(tlbncfg & TLBnCFG_IPROT)) { /* no IPROT supported by TLB */ tlb->mas1 &= ~MAS1_IPROT; } flush_page(env, tlb); } static inline void booke206_tlb_to_mas(CPUPPCState *env, ppcmas_tlb_t *tlb) { int tlbn = booke206_tlbm_to_tlbn(env, tlb); int way = booke206_tlbm_to_way(env, tlb); env->spr[SPR_BOOKE_MAS0] = tlbn << MAS0_TLBSEL_SHIFT; env->spr[SPR_BOOKE_MAS0] |= way << MAS0_ESEL_SHIFT; env->spr[SPR_BOOKE_MAS0] |= env->last_way << MAS0_NV_SHIFT; env->spr[SPR_BOOKE_MAS1] = tlb->mas1; env->spr[SPR_BOOKE_MAS2] = tlb->mas2; env->spr[SPR_BOOKE_MAS3] = tlb->mas7_3; env->spr[SPR_BOOKE_MAS7] = tlb->mas7_3 >> 32; } void helper_booke206_tlbre(CPUPPCState *env) { ppcmas_tlb_t *tlb = NULL; tlb = booke206_cur_tlb(env); if (!tlb) { env->spr[SPR_BOOKE_MAS1] = 0; } else { booke206_tlb_to_mas(env, tlb); } } void helper_booke206_tlbsx(CPUPPCState *env, target_ulong address) { ppcmas_tlb_t *tlb = NULL; int i, j; hwaddr raddr; uint32_t spid, sas; spid = (env->spr[SPR_BOOKE_MAS6] & MAS6_SPID_MASK) >> MAS6_SPID_SHIFT; sas = env->spr[SPR_BOOKE_MAS6] & MAS6_SAS; 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; } if (ppcmas_tlb_check(env, tlb, &raddr, address, spid)) { continue; } if (sas != ((tlb->mas1 & MAS1_TS) >> MAS1_TS_SHIFT)) { continue; } booke206_tlb_to_mas(env, tlb); return; } } /* no entry found, fill with defaults */ 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_MAS7] = 0; if (env->spr[SPR_BOOKE_MAS6] & MAS6_SAS) { env->spr[SPR_BOOKE_MAS1] |= MAS1_TS; } env->spr[SPR_BOOKE_MAS1] |= (env->spr[SPR_BOOKE_MAS6] >> 16) << 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 inline void booke206_invalidate_ea_tlb(CPUPPCState *env, int tlbn, vaddr ea) { int i; int ways = booke206_tlb_ways(env, tlbn); target_ulong mask; for (i = 0; i < ways; i++) { ppcmas_tlb_t *tlb = booke206_get_tlbm(env, tlbn, ea, i); if (!tlb) { continue; } mask = ~(booke206_tlb_to_page_size(env, tlb) - 1); if (((tlb->mas2 & MAS2_EPN_MASK) == (ea & mask)) && !(tlb->mas1 & MAS1_IPROT)) { tlb->mas1 &= ~MAS1_VALID; } } } void helper_booke206_tlbivax(CPUPPCState *env, target_ulong address) { CPUState *cs; if (address & 0x4) { /* flush all entries */ if (address & 0x8) { /* flush all of TLB1 */ booke206_flush_tlb(env, BOOKE206_FLUSH_TLB1, 1); } else { /* flush all of TLB0 */ booke206_flush_tlb(env, BOOKE206_FLUSH_TLB0, 0); } return; } if (address & 0x8) { /* flush TLB1 entries */ booke206_invalidate_ea_tlb(env, 1, address); CPU_FOREACH(cs) { tlb_flush(cs); } } else { /* flush TLB0 entries */ booke206_invalidate_ea_tlb(env, 0, address); CPU_FOREACH(cs) { tlb_flush_page(cs, address & MAS2_EPN_MASK); } } } void helper_booke206_tlbilx0(CPUPPCState *env, target_ulong address) { /* XXX missing LPID handling */ booke206_flush_tlb(env, -1, 1); } void helper_booke206_tlbilx1(CPUPPCState *env, target_ulong address) { int i, j; int tid = (env->spr[SPR_BOOKE_MAS6] & MAS6_SPID); ppcmas_tlb_t *tlb = env->tlb.tlbm; int tlb_size; /* XXX missing LPID handling */ for (i = 0; i < BOOKE206_MAX_TLBN; i++) { tlb_size = booke206_tlb_size(env, i); for (j = 0; j < tlb_size; j++) { if (!(tlb[j].mas1 & MAS1_IPROT) && ((tlb[j].mas1 & MAS1_TID_MASK) == tid)) { tlb[j].mas1 &= ~MAS1_VALID; } } tlb += booke206_tlb_size(env, i); } tlb_flush(env_cpu(env)); } void helper_booke206_tlbilx3(CPUPPCState *env, target_ulong address) { int i, j; ppcmas_tlb_t *tlb; int tid = (env->spr[SPR_BOOKE_MAS6] & MAS6_SPID); int pid = tid >> MAS6_SPID_SHIFT; int sgs = env->spr[SPR_BOOKE_MAS5] & MAS5_SGS; int ind = (env->spr[SPR_BOOKE_MAS6] & MAS6_SIND) ? MAS1_IND : 0; /* XXX check for unsupported isize and raise an invalid opcode then */ int size = env->spr[SPR_BOOKE_MAS6] & MAS6_ISIZE_MASK; /* XXX implement MAV2 handling */ bool mav2 = false; /* XXX missing LPID handling */ /* flush by pid and ea */ 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; } if ((ppcmas_tlb_check(env, tlb, NULL, address, pid) != 0) || (tlb->mas1 & MAS1_IPROT) || ((tlb->mas1 & MAS1_IND) != ind) || ((tlb->mas8 & MAS8_TGS) != sgs)) { continue; } if (mav2 && ((tlb->mas1 & MAS1_TSIZE_MASK) != size)) { /* XXX only check when MMUCFG[TWC] || TLBnCFG[HES] */ continue; } /* XXX e500mc doesn't match SAS, but other cores might */ tlb->mas1 &= ~MAS1_VALID; } } tlb_flush(env_cpu(env)); } void helper_booke206_tlbflush(CPUPPCState *env, target_ulong type) { int flags = 0; if (type & 2) { flags |= BOOKE206_FLUSH_TLB1; } if (type & 4) { flags |= BOOKE206_FLUSH_TLB0; } booke206_flush_tlb(env, flags, 1); } void helper_check_tlb_flush_local(CPUPPCState *env) { check_tlb_flush(env, false); } void helper_check_tlb_flush_global(CPUPPCState *env) { check_tlb_flush(env, true); } bool ppc_cpu_tlb_fill(CPUState *cs, vaddr eaddr, int size, MMUAccessType access_type, int mmu_idx, bool probe, uintptr_t retaddr) { PowerPCCPU *cpu = POWERPC_CPU(cs); hwaddr raddr; int page_size, prot; if (ppc_xlate(cpu, eaddr, access_type, &raddr, &page_size, &prot, mmu_idx, !probe)) { tlb_set_page(cs, eaddr & TARGET_PAGE_MASK, raddr & TARGET_PAGE_MASK, prot, mmu_idx, 1UL << page_size); return true; } if (probe) { return false; } raise_exception_err_ra(&cpu->env, cs->exception_index, cpu->env.error_code, retaddr); }