diff options
Diffstat (limited to 'target/ppc/mmu_helper.c')
| -rw-r--r-- | target/ppc/mmu_helper.c | 137 |
1 files changed, 84 insertions, 53 deletions
diff --git a/target/ppc/mmu_helper.c b/target/ppc/mmu_helper.c index ab72473eeb..d226b35739 100644 --- a/target/ppc/mmu_helper.c +++ b/target/ppc/mmu_helper.c @@ -33,11 +33,11 @@ #include "mmu-book3s-v3.h" #include "mmu-radix64.h" -//#define DEBUG_MMU -//#define DEBUG_BATS -//#define DEBUG_SOFTWARE_TLB -//#define DUMP_PAGE_TABLES -//#define FLUSH_ALL_TLBS +/* #define DEBUG_MMU */ +/* #define DEBUG_BATS */ +/* #define DEBUG_SOFTWARE_TLB */ +/* #define DUMP_PAGE_TABLES */ +/* #define FLUSH_ALL_TLBS */ #ifdef DEBUG_MMU # define LOG_MMU_STATE(cpu) log_cpu_state_mask(CPU_LOG_MMU, (cpu), 0) @@ -152,7 +152,8 @@ static int check_prot(int prot, int rw, int access_type) } static inline int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, target_ulong pte0, - target_ulong pte1, int h, int rw, int type) + target_ulong pte1, int h, + int rw, int type) { target_ulong ptem, mmask; int access, ret, pteh, ptev, pp; @@ -332,7 +333,8 @@ static inline int ppc6xx_tlb_check(CPUPPCState *env, mmu_ctx_t *ctx, pte_is_valid(tlb->pte0) ? "valid" : "inval", tlb->EPN, eaddr, tlb->pte1, rw ? 'S' : 'L', access_type == ACCESS_CODE ? 'I' : 'D'); - switch (ppc6xx_tlb_pte_check(ctx, tlb->pte0, tlb->pte1, 0, rw, access_type)) { + switch (ppc6xx_tlb_pte_check(ctx, tlb->pte0, tlb->pte1, + 0, rw, access_type)) { case -3: /* TLB inconsistency */ return -1; @@ -347,9 +349,11 @@ static inline int ppc6xx_tlb_check(CPUPPCState *env, mmu_ctx_t *ctx, 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. + /* + * 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; @@ -550,14 +554,18 @@ static inline int get_segment_6xx_tlb(CPUPPCState *env, mmu_ctx_t *ctx, qemu_log_mask(CPU_LOG_MMU, "direct store...\n"); /* Direct-store segment : absolutely *BUGGY* for now */ - /* Direct-store implies a 32-bit MMU. + /* + * Direct-store implies a 32-bit MMU. * Check the Segment Register's bus unit ID (BUID). */ sr = env->sr[eaddr >> 28]; if ((sr & 0x1FF00000) >> 20 == 0x07f) { - /* Memory-forced I/O controller interface access */ - /* If T=1 and BUID=x'07F', the 601 performs a memory access - * to SR[28-31] LA[4-31], bypassing all protection mechanisms. + /* + * Memory-forced I/O controller interface access + * + * If T=1 and BUID=x'07F', the 601 performs a memory + * access to SR[28-31] LA[4-31], bypassing all protection + * mechanisms. */ ctx->raddr = ((sr & 0xF) << 28) | (eaddr & 0x0FFFFFFF); ctx->prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; @@ -578,9 +586,11 @@ static inline int get_segment_6xx_tlb(CPUPPCState *env, mmu_ctx_t *ctx, /* 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 :-) + /* + * 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; @@ -942,12 +952,14 @@ static uint32_t mmubooke206_esr(int mmu_idx, bool rw) 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. */ +/* + * 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) @@ -1369,8 +1381,9 @@ static inline int check_physical(CPUPPCState *env, mmu_ctx_t *ctx, case POWERPC_MMU_SOFT_4xx_Z: if (unlikely(msr_pe != 0)) { - /* 403 family add some particular protections, - * using PBL/PBU registers for accesses with no translation. + /* + * 403 family add some particular protections, using + * PBL/PBU registers for accesses with no translation. */ in_plb = /* Check PLB validity */ @@ -1453,7 +1466,8 @@ static int get_physical_address_wtlb( if (real_mode) { ret = check_physical(env, ctx, eaddr, rw); } else { - cpu_abort(CPU(cpu), "PowerPC in real mode do not do any translation\n"); + cpu_abort(CPU(cpu), + "PowerPC in real mode do not do any translation\n"); } return -1; default: @@ -1498,9 +1512,10 @@ hwaddr ppc_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) if (unlikely(get_physical_address(env, &ctx, addr, 0, ACCESS_INT) != 0)) { - /* Some MMUs have separate TLBs for code and data. If we only try an - * ACCESS_INT, we may not be able to read instructions mapped by code - * TLBs, so we also try a ACCESS_CODE. + /* + * Some MMUs have separate TLBs for code and data. If we only + * try an ACCESS_INT, we may not be able to read instructions + * mapped by code TLBs, so we also try a ACCESS_CODE. */ if (unlikely(get_physical_address(env, &ctx, addr, 0, ACCESS_CODE) != 0)) { @@ -1834,8 +1849,9 @@ void helper_store_ibatu(CPUPPCState *env, uint32_t nr, target_ulong value) #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 + /* + * 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) | @@ -1865,8 +1881,9 @@ void helper_store_dbatu(CPUPPCState *env, uint32_t nr, target_ulong value) 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 + /* + * 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) @@ -1913,8 +1930,9 @@ void helper_store_601_batu(CPUPPCState *env, uint32_t nr, target_ulong value) do_inval = 1; #endif } - /* When storing valid upper BAT, mask BEPI and BRPN - * and invalidate all TLBs covered by this BAT + /* + * 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); @@ -2027,7 +2045,8 @@ void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr) #if defined(TARGET_PPC64) if (env->mmu_model & POWERPC_MMU_64) { /* tlbie invalidate TLBs for all segments */ - /* XXX: given the fact that there are too many segments to invalidate, + /* + * 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 */ @@ -2044,10 +2063,11 @@ void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr) 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). + /* + * 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; @@ -2152,8 +2172,10 @@ void helper_store_sr(CPUPPCState *env, target_ulong srnum, target_ulong value) #endif if (env->sr[srnum] != value) { env->sr[srnum] = value; -/* Invalidating 256MB of virtual memory in 4kB pages is way longer than - flusing the whole TLB. */ + /* + * Invalidating 256MB of virtual memory in 4kB pages is way + * longer than flusing the whole TLB. + */ #if !defined(FLUSH_ALL_TLBS) && 0 { target_ulong page, end; @@ -2264,10 +2286,12 @@ target_ulong helper_rac(CPUPPCState *env, target_ulong addr) int nb_BATs; target_ulong ret = 0; - /* We don't have to generate many instances of this instruction, + /* + * We don't have to generate many instances of this instruction, * as rac is supervisor only. + * + * XXX: FIX THIS: Pretend we have no BAT */ - /* 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) { @@ -2422,7 +2446,8 @@ void helper_4xx_tlbwe_hi(CPUPPCState *env, target_ulong entry, } tlb->size = booke_tlb_to_page_size((val >> PPC4XX_TLBHI_SIZE_SHIFT) & PPC4XX_TLBHI_SIZE_MASK); - /* We cannot handle TLB size < TARGET_PAGE_SIZE. + /* + * 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) { @@ -2742,7 +2767,8 @@ void helper_booke206_tlbwe(CPUPPCState *env) } if (tlb->mas1 & MAS1_VALID) { - /* Invalidate the page in QEMU TLB if it was a valid entry. + /* + * 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": @@ -2751,7 +2777,8 @@ void helper_booke206_tlbwe(CPUPPCState *env) * "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." */ + * TLB entry is automatically invalidated." + */ flush_page(env, tlb); } @@ -2777,8 +2804,9 @@ void helper_booke206_tlbwe(CPUPPCState *env) 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. + /* + * Executing a tlbwe instruction in 32-bit mode will set bits + * 0:31 of the TLB EPN field to zero. */ mask &= 0xffffffff; } @@ -3022,10 +3050,13 @@ void helper_check_tlb_flush_global(CPUPPCState *env) /*****************************************************************************/ -/* try to fill the TLB and return an exception if error. If retaddr is - NULL, it means that the function was called in C code (i.e. not - from generated code or from helper.c) */ -/* XXX: fix it to restore all registers */ +/* + * try to fill the TLB and return an exception if error. If retaddr is + * NULL, it means that the function was called in C code (i.e. not + * from generated code or from helper.c) + * + * XXX: fix it to restore all registers + */ void tlb_fill(CPUState *cs, target_ulong addr, int size, MMUAccessType access_type, int mmu_idx, uintptr_t retaddr) { |