diff options
Diffstat (limited to 'target-sparc')
| -rw-r--r-- | target-sparc/cpu.h | 2 | ||||
| -rw-r--r-- | target-sparc/helper.c | 860 | ||||
| -rw-r--r-- | target-sparc/mmu_helper.c | 877 |
3 files changed, 879 insertions, 860 deletions
diff --git a/target-sparc/cpu.h b/target-sparc/cpu.h index ce1e66857a..25b4f1a1dc 100644 --- a/target-sparc/cpu.h +++ b/target-sparc/cpu.h @@ -510,7 +510,7 @@ typedef struct CPUSPARCState { CPUSPARCState *cpu_sparc_init(const char *cpu_model); void cpu_sparc_set_id(CPUSPARCState *env, unsigned int cpu); void sparc_cpu_list(FILE *f, fprintf_function cpu_fprintf); -/* helper.c */ +/* mmu_helper.c */ int cpu_sparc_handle_mmu_fault(CPUSPARCState *env1, target_ulong address, int rw, int mmu_idx); #define cpu_handle_mmu_fault cpu_sparc_handle_mmu_fault diff --git a/target-sparc/helper.c b/target-sparc/helper.c index 1b217826ed..18609c449c 100644 --- a/target-sparc/helper.c +++ b/target-sparc/helper.c @@ -1,5 +1,5 @@ /* - * sparc helpers + * Misc Sparc helpers * * Copyright (c) 2003-2005 Fabrice Bellard * @@ -22,864 +22,6 @@ #include "helper.h" #include "sysemu.h" -//#define DEBUG_MMU - -#ifdef DEBUG_MMU -#define DPRINTF_MMU(fmt, ...) \ - do { printf("MMU: " fmt , ## __VA_ARGS__); } while (0) -#else -#define DPRINTF_MMU(fmt, ...) do {} while (0) -#endif - -/* Sparc MMU emulation */ - -#if defined(CONFIG_USER_ONLY) - -int cpu_sparc_handle_mmu_fault(CPUState *env1, target_ulong address, int rw, - int mmu_idx) -{ - if (rw & 2) { - env1->exception_index = TT_TFAULT; - } else { - env1->exception_index = TT_DFAULT; - } - return 1; -} - -#else - -#ifndef TARGET_SPARC64 -/* - * Sparc V8 Reference MMU (SRMMU) - */ -static const int access_table[8][8] = { - { 0, 0, 0, 0, 8, 0, 12, 12 }, - { 0, 0, 0, 0, 8, 0, 0, 0 }, - { 8, 8, 0, 0, 0, 8, 12, 12 }, - { 8, 8, 0, 0, 0, 8, 0, 0 }, - { 8, 0, 8, 0, 8, 8, 12, 12 }, - { 8, 0, 8, 0, 8, 0, 8, 0 }, - { 8, 8, 8, 0, 8, 8, 12, 12 }, - { 8, 8, 8, 0, 8, 8, 8, 0 } -}; - -static const int perm_table[2][8] = { - { - PAGE_READ, - PAGE_READ | PAGE_WRITE, - PAGE_READ | PAGE_EXEC, - PAGE_READ | PAGE_WRITE | PAGE_EXEC, - PAGE_EXEC, - PAGE_READ | PAGE_WRITE, - PAGE_READ | PAGE_EXEC, - PAGE_READ | PAGE_WRITE | PAGE_EXEC - }, - { - PAGE_READ, - PAGE_READ | PAGE_WRITE, - PAGE_READ | PAGE_EXEC, - PAGE_READ | PAGE_WRITE | PAGE_EXEC, - PAGE_EXEC, - PAGE_READ, - 0, - 0, - } -}; - -static int get_physical_address(CPUState *env, target_phys_addr_t *physical, - int *prot, int *access_index, - target_ulong address, int rw, int mmu_idx, - target_ulong *page_size) -{ - int access_perms = 0; - target_phys_addr_t pde_ptr; - uint32_t pde; - int error_code = 0, is_dirty, is_user; - unsigned long page_offset; - - is_user = mmu_idx == MMU_USER_IDX; - - if ((env->mmuregs[0] & MMU_E) == 0) { /* MMU disabled */ - *page_size = TARGET_PAGE_SIZE; - /* Boot mode: instruction fetches are taken from PROM */ - if (rw == 2 && (env->mmuregs[0] & env->def->mmu_bm)) { - *physical = env->prom_addr | (address & 0x7ffffULL); - *prot = PAGE_READ | PAGE_EXEC; - return 0; - } - *physical = address; - *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; - return 0; - } - - *access_index = ((rw & 1) << 2) | (rw & 2) | (is_user ? 0 : 1); - *physical = 0xffffffffffff0000ULL; - - /* SPARC reference MMU table walk: Context table->L1->L2->PTE */ - /* Context base + context number */ - pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2); - pde = ldl_phys(pde_ptr); - - /* Ctx pde */ - switch (pde & PTE_ENTRYTYPE_MASK) { - default: - case 0: /* Invalid */ - return 1 << 2; - case 2: /* L0 PTE, maybe should not happen? */ - case 3: /* Reserved */ - return 4 << 2; - case 1: /* L0 PDE */ - pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4); - pde = ldl_phys(pde_ptr); - - switch (pde & PTE_ENTRYTYPE_MASK) { - default: - case 0: /* Invalid */ - return (1 << 8) | (1 << 2); - case 3: /* Reserved */ - return (1 << 8) | (4 << 2); - case 1: /* L1 PDE */ - pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4); - pde = ldl_phys(pde_ptr); - - switch (pde & PTE_ENTRYTYPE_MASK) { - default: - case 0: /* Invalid */ - return (2 << 8) | (1 << 2); - case 3: /* Reserved */ - return (2 << 8) | (4 << 2); - case 1: /* L2 PDE */ - pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4); - pde = ldl_phys(pde_ptr); - - switch (pde & PTE_ENTRYTYPE_MASK) { - default: - case 0: /* Invalid */ - return (3 << 8) | (1 << 2); - case 1: /* PDE, should not happen */ - case 3: /* Reserved */ - return (3 << 8) | (4 << 2); - case 2: /* L3 PTE */ - page_offset = (address & TARGET_PAGE_MASK) & - (TARGET_PAGE_SIZE - 1); - } - *page_size = TARGET_PAGE_SIZE; - break; - case 2: /* L2 PTE */ - page_offset = address & 0x3ffff; - *page_size = 0x40000; - } - break; - case 2: /* L1 PTE */ - page_offset = address & 0xffffff; - *page_size = 0x1000000; - } - } - - /* check access */ - access_perms = (pde & PTE_ACCESS_MASK) >> PTE_ACCESS_SHIFT; - error_code = access_table[*access_index][access_perms]; - if (error_code && !((env->mmuregs[0] & MMU_NF) && is_user)) { - return error_code; - } - - /* update page modified and dirty bits */ - is_dirty = (rw & 1) && !(pde & PG_MODIFIED_MASK); - if (!(pde & PG_ACCESSED_MASK) || is_dirty) { - pde |= PG_ACCESSED_MASK; - if (is_dirty) { - pde |= PG_MODIFIED_MASK; - } - stl_phys_notdirty(pde_ptr, pde); - } - - /* the page can be put in the TLB */ - *prot = perm_table[is_user][access_perms]; - if (!(pde & PG_MODIFIED_MASK)) { - /* only set write access if already dirty... otherwise wait - for dirty access */ - *prot &= ~PAGE_WRITE; - } - - /* Even if large ptes, we map only one 4KB page in the cache to - avoid filling it too fast */ - *physical = ((target_phys_addr_t)(pde & PTE_ADDR_MASK) << 4) + page_offset; - return error_code; -} - -/* Perform address translation */ -int cpu_sparc_handle_mmu_fault(CPUState *env, target_ulong address, int rw, - int mmu_idx) -{ - target_phys_addr_t paddr; - target_ulong vaddr; - target_ulong page_size; - int error_code = 0, prot, access_index; - - error_code = get_physical_address(env, &paddr, &prot, &access_index, - address, rw, mmu_idx, &page_size); - if (error_code == 0) { - vaddr = address & TARGET_PAGE_MASK; - paddr &= TARGET_PAGE_MASK; -#ifdef DEBUG_MMU - printf("Translate at " TARGET_FMT_lx " -> " TARGET_FMT_plx ", vaddr " - TARGET_FMT_lx "\n", address, paddr, vaddr); -#endif - tlb_set_page(env, vaddr, paddr, prot, mmu_idx, page_size); - return 0; - } - - if (env->mmuregs[3]) { /* Fault status register */ - env->mmuregs[3] = 1; /* overflow (not read before another fault) */ - } - env->mmuregs[3] |= (access_index << 5) | error_code | 2; - env->mmuregs[4] = address; /* Fault address register */ - - if ((env->mmuregs[0] & MMU_NF) || env->psret == 0) { - /* No fault mode: if a mapping is available, just override - permissions. If no mapping is available, redirect accesses to - neverland. Fake/overridden mappings will be flushed when - switching to normal mode. */ - vaddr = address & TARGET_PAGE_MASK; - prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; - tlb_set_page(env, vaddr, paddr, prot, mmu_idx, TARGET_PAGE_SIZE); - return 0; - } else { - if (rw & 2) { - env->exception_index = TT_TFAULT; - } else { - env->exception_index = TT_DFAULT; - } - return 1; - } -} - -target_ulong mmu_probe(CPUState *env, target_ulong address, int mmulev) -{ - target_phys_addr_t pde_ptr; - uint32_t pde; - - /* Context base + context number */ - pde_ptr = (target_phys_addr_t)(env->mmuregs[1] << 4) + - (env->mmuregs[2] << 2); - pde = ldl_phys(pde_ptr); - - switch (pde & PTE_ENTRYTYPE_MASK) { - default: - case 0: /* Invalid */ - case 2: /* PTE, maybe should not happen? */ - case 3: /* Reserved */ - return 0; - case 1: /* L1 PDE */ - if (mmulev == 3) { - return pde; - } - pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4); - pde = ldl_phys(pde_ptr); - - switch (pde & PTE_ENTRYTYPE_MASK) { - default: - case 0: /* Invalid */ - case 3: /* Reserved */ - return 0; - case 2: /* L1 PTE */ - return pde; - case 1: /* L2 PDE */ - if (mmulev == 2) { - return pde; - } - pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4); - pde = ldl_phys(pde_ptr); - - switch (pde & PTE_ENTRYTYPE_MASK) { - default: - case 0: /* Invalid */ - case 3: /* Reserved */ - return 0; - case 2: /* L2 PTE */ - return pde; - case 1: /* L3 PDE */ - if (mmulev == 1) { - return pde; - } - pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4); - pde = ldl_phys(pde_ptr); - - switch (pde & PTE_ENTRYTYPE_MASK) { - default: - case 0: /* Invalid */ - case 1: /* PDE, should not happen */ - case 3: /* Reserved */ - return 0; - case 2: /* L3 PTE */ - return pde; - } - } - } - } - return 0; -} - -void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUState *env) -{ - target_ulong va, va1, va2; - unsigned int n, m, o; - target_phys_addr_t pde_ptr, pa; - uint32_t pde; - - pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2); - pde = ldl_phys(pde_ptr); - (*cpu_fprintf)(f, "Root ptr: " TARGET_FMT_plx ", ctx: %d\n", - (target_phys_addr_t)env->mmuregs[1] << 4, env->mmuregs[2]); - for (n = 0, va = 0; n < 256; n++, va += 16 * 1024 * 1024) { - pde = mmu_probe(env, va, 2); - if (pde) { - pa = cpu_get_phys_page_debug(env, va); - (*cpu_fprintf)(f, "VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_plx - " PDE: " TARGET_FMT_lx "\n", va, pa, pde); - for (m = 0, va1 = va; m < 64; m++, va1 += 256 * 1024) { - pde = mmu_probe(env, va1, 1); - if (pde) { - pa = cpu_get_phys_page_debug(env, va1); - (*cpu_fprintf)(f, " VA: " TARGET_FMT_lx ", PA: " - TARGET_FMT_plx " PDE: " TARGET_FMT_lx "\n", - va1, pa, pde); - for (o = 0, va2 = va1; o < 64; o++, va2 += 4 * 1024) { - pde = mmu_probe(env, va2, 0); - if (pde) { - pa = cpu_get_phys_page_debug(env, va2); - (*cpu_fprintf)(f, " VA: " TARGET_FMT_lx ", PA: " - TARGET_FMT_plx " PTE: " - TARGET_FMT_lx "\n", - va2, pa, pde); - } - } - } - } - } - } -} - -/* Gdb expects all registers windows to be flushed in ram. This function handles - * reads (and only reads) in stack frames as if windows were flushed. We assume - * that the sparc ABI is followed. - */ -int target_memory_rw_debug(CPUState *env, target_ulong addr, - uint8_t *buf, int len, int is_write) -{ - int i; - int len1; - int cwp = env->cwp; - - if (!is_write) { - for (i = 0; i < env->nwindows; i++) { - int off; - target_ulong fp = env->regbase[cwp * 16 + 22]; - - /* Assume fp == 0 means end of frame. */ - if (fp == 0) { - break; - } - - cwp = cpu_cwp_inc(env, cwp + 1); - - /* Invalid window ? */ - if (env->wim & (1 << cwp)) { - break; - } - - /* According to the ABI, the stack is growing downward. */ - if (addr + len < fp) { - break; - } - - /* Not in this frame. */ - if (addr > fp + 64) { - continue; - } - - /* Handle access before this window. */ - if (addr < fp) { - len1 = fp - addr; - if (cpu_memory_rw_debug(env, addr, buf, len1, is_write) != 0) { - return -1; - } - addr += len1; - len -= len1; - buf += len1; - } - - /* Access byte per byte to registers. Not very efficient but speed - * is not critical. - */ - off = addr - fp; - len1 = 64 - off; - - if (len1 > len) { - len1 = len; - } - - for (; len1; len1--) { - int reg = cwp * 16 + 8 + (off >> 2); - union { - uint32_t v; - uint8_t c[4]; - } u; - u.v = cpu_to_be32(env->regbase[reg]); - *buf++ = u.c[off & 3]; - addr++; - len--; - off++; - } - - if (len == 0) { - return 0; - } - } - } - return cpu_memory_rw_debug(env, addr, buf, len, is_write); -} - -#else /* !TARGET_SPARC64 */ - -/* 41 bit physical address space */ -static inline target_phys_addr_t ultrasparc_truncate_physical(uint64_t x) -{ - return x & 0x1ffffffffffULL; -} - -/* - * UltraSparc IIi I/DMMUs - */ - -/* Returns true if TTE tag is valid and matches virtual address value - in context requires virtual address mask value calculated from TTE - entry size */ -static inline int ultrasparc_tag_match(SparcTLBEntry *tlb, - uint64_t address, uint64_t context, - target_phys_addr_t *physical) -{ - uint64_t mask; - - switch (TTE_PGSIZE(tlb->tte)) { - default: - case 0x0: /* 8k */ - mask = 0xffffffffffffe000ULL; - break; - case 0x1: /* 64k */ - mask = 0xffffffffffff0000ULL; - break; - case 0x2: /* 512k */ - mask = 0xfffffffffff80000ULL; - break; - case 0x3: /* 4M */ - mask = 0xffffffffffc00000ULL; - break; - } - - /* valid, context match, virtual address match? */ - if (TTE_IS_VALID(tlb->tte) && - (TTE_IS_GLOBAL(tlb->tte) || tlb_compare_context(tlb, context)) - && compare_masked(address, tlb->tag, mask)) { - /* decode physical address */ - *physical = ((tlb->tte & mask) | (address & ~mask)) & 0x1ffffffe000ULL; - return 1; - } - - return 0; -} - -static int get_physical_address_data(CPUState *env, - target_phys_addr_t *physical, int *prot, - target_ulong address, int rw, int mmu_idx) -{ - unsigned int i; - uint64_t context; - uint64_t sfsr = 0; - - int is_user = (mmu_idx == MMU_USER_IDX || - mmu_idx == MMU_USER_SECONDARY_IDX); - - if ((env->lsu & DMMU_E) == 0) { /* DMMU disabled */ - *physical = ultrasparc_truncate_physical(address); - *prot = PAGE_READ | PAGE_WRITE; - return 0; - } - - switch (mmu_idx) { - case MMU_USER_IDX: - case MMU_KERNEL_IDX: - context = env->dmmu.mmu_primary_context & 0x1fff; - sfsr |= SFSR_CT_PRIMARY; - break; - case MMU_USER_SECONDARY_IDX: - case MMU_KERNEL_SECONDARY_IDX: - context = env->dmmu.mmu_secondary_context & 0x1fff; - sfsr |= SFSR_CT_SECONDARY; - break; - case MMU_NUCLEUS_IDX: - sfsr |= SFSR_CT_NUCLEUS; - /* FALLTHRU */ - default: - context = 0; - break; - } - - if (rw == 1) { - sfsr |= SFSR_WRITE_BIT; - } else if (rw == 4) { - sfsr |= SFSR_NF_BIT; - } - - for (i = 0; i < 64; i++) { - /* ctx match, vaddr match, valid? */ - if (ultrasparc_tag_match(&env->dtlb[i], address, context, physical)) { - int do_fault = 0; - - /* access ok? */ - /* multiple bits in SFSR.FT may be set on TT_DFAULT */ - if (TTE_IS_PRIV(env->dtlb[i].tte) && is_user) { - do_fault = 1; - sfsr |= SFSR_FT_PRIV_BIT; /* privilege violation */ - - DPRINTF_MMU("DFAULT at %" PRIx64 " context %" PRIx64 - " mmu_idx=%d tl=%d\n", - address, context, mmu_idx, env->tl); - } - if (rw == 4) { - if (TTE_IS_SIDEEFFECT(env->dtlb[i].tte)) { - do_fault = 1; - sfsr |= SFSR_FT_NF_E_BIT; - } - } else { - if (TTE_IS_NFO(env->dtlb[i].tte)) { - do_fault = 1; - sfsr |= SFSR_FT_NFO_BIT; - } - } - - if (do_fault) { - /* faults above are reported with TT_DFAULT. */ - env->exception_index = TT_DFAULT; - } else if (!TTE_IS_W_OK(env->dtlb[i].tte) && (rw == 1)) { - do_fault = 1; - env->exception_index = TT_DPROT; - - DPRINTF_MMU("DPROT at %" PRIx64 " context %" PRIx64 - " mmu_idx=%d tl=%d\n", - address, context, mmu_idx, env->tl); - } - - if (!do_fault) { - *prot = PAGE_READ; - if (TTE_IS_W_OK(env->dtlb[i].tte)) { - *prot |= PAGE_WRITE; - } - - TTE_SET_USED(env->dtlb[i].tte); - - return 0; - } - - if (env->dmmu.sfsr & SFSR_VALID_BIT) { /* Fault status register */ - sfsr |= SFSR_OW_BIT; /* overflow (not read before - another fault) */ - } - - if (env->pstate & PS_PRIV) { - sfsr |= SFSR_PR_BIT; - } - - /* FIXME: ASI field in SFSR must be set */ - env->dmmu.sfsr = sfsr | SFSR_VALID_BIT; - - env->dmmu.sfar = address; /* Fault address register */ - - env->dmmu.tag_access = (address & ~0x1fffULL) | context; - - return 1; - } - } - - DPRINTF_MMU("DMISS at %" PRIx64 " context %" PRIx64 "\n", - address, context); - - /* - * On MMU misses: - * - UltraSPARC IIi: SFSR and SFAR unmodified - * - JPS1: SFAR updated and some fields of SFSR updated - */ - env->dmmu.tag_access = (address & ~0x1fffULL) | context; - env->exception_index = TT_DMISS; - return 1; -} - -static int get_physical_address_code(CPUState *env, - target_phys_addr_t *physical, int *prot, - target_ulong address, int mmu_idx) -{ - unsigned int i; - uint64_t context; - - int is_user = (mmu_idx == MMU_USER_IDX || - mmu_idx == MMU_USER_SECONDARY_IDX); - - if ((env->lsu & IMMU_E) == 0 || (env->pstate & PS_RED) != 0) { - /* IMMU disabled */ - *physical = ultrasparc_truncate_physical(address); - *prot = PAGE_EXEC; - return 0; - } - - if (env->tl == 0) { - /* PRIMARY context */ - context = env->dmmu.mmu_primary_context & 0x1fff; - } else { - /* NUCLEUS context */ - context = 0; - } - - for (i = 0; i < 64; i++) { - /* ctx match, vaddr match, valid? */ - if (ultrasparc_tag_match(&env->itlb[i], - address, context, physical)) { - /* access ok? */ - if (TTE_IS_PRIV(env->itlb[i].tte) && is_user) { - /* Fault status register */ - if (env->immu.sfsr & SFSR_VALID_BIT) { - env->immu.sfsr = SFSR_OW_BIT; /* overflow (not read before - another fault) */ - } else { - env->immu.sfsr = 0; - } - if (env->pstate & PS_PRIV) { - env->immu.sfsr |= SFSR_PR_BIT; - } - if (env->tl > 0) { - env->immu.sfsr |= SFSR_CT_NUCLEUS; - } - - /* FIXME: ASI field in SFSR must be set */ - env->immu.sfsr |= SFSR_FT_PRIV_BIT | SFSR_VALID_BIT; - env->exception_index = TT_TFAULT; - - env->immu.tag_access = (address & ~0x1fffULL) | context; - - DPRINTF_MMU("TFAULT at %" PRIx64 " context %" PRIx64 "\n", - address, context); - - return 1; - } - *prot = PAGE_EXEC; - TTE_SET_USED(env->itlb[i].tte); - return 0; - } - } - - DPRINTF_MMU("TMISS at %" PRIx64 " context %" PRIx64 "\n", - address, context); - - /* Context is stored in DMMU (dmmuregs[1]) also for IMMU */ - env->immu.tag_access = (address & ~0x1fffULL) | context; - env->exception_index = TT_TMISS; - return 1; -} - -static int get_physical_address(CPUState *env, target_phys_addr_t *physical, - int *prot, int *access_index, - target_ulong address, int rw, int mmu_idx, - target_ulong *page_size) -{ - /* ??? We treat everything as a small page, then explicitly flush - everything when an entry is evicted. */ - *page_size = TARGET_PAGE_SIZE; - -#if defined(DEBUG_MMU) - /* safety net to catch wrong softmmu index use from dynamic code */ - if (env->tl > 0 && mmu_idx != MMU_NUCLEUS_IDX) { - DPRINTF_MMU("get_physical_address %s tl=%d mmu_idx=%d" - " primary context=%" PRIx64 - " secondary context=%" PRIx64 - " address=%" PRIx64 - "\n", - (rw == 2 ? "CODE" : "DATA"), - env->tl, mmu_idx, - env->dmmu.mmu_primary_context, - env->dmmu.mmu_secondary_context, - address); - } -#endif - - if (rw == 2) { - return get_physical_address_code(env, physical, prot, address, - mmu_idx); - } else { - return get_physical_address_data(env, physical, prot, address, rw, - mmu_idx); - } -} - -/* Perform address translation */ -int cpu_sparc_handle_mmu_fault(CPUState *env, target_ulong address, int rw, - int mmu_idx) -{ - target_ulong virt_addr, vaddr; - target_phys_addr_t paddr; - target_ulong page_size; - int error_code = 0, prot, access_index; - - error_code = get_physical_address(env, &paddr, &prot, &access_index, - address, rw, mmu_idx, &page_size); - if (error_code == 0) { - virt_addr = address & TARGET_PAGE_MASK; - vaddr = virt_addr + ((address & TARGET_PAGE_MASK) & - (TARGET_PAGE_SIZE - 1)); - - DPRINTF_MMU("Translate at %" PRIx64 " -> %" PRIx64 "," - " vaddr %" PRIx64 - " mmu_idx=%d" - " tl=%d" - " primary context=%" PRIx64 - " secondary context=%" PRIx64 - "\n", - address, paddr, vaddr, mmu_idx, env->tl, - env->dmmu.mmu_primary_context, - env->dmmu.mmu_secondary_context); - - tlb_set_page(env, vaddr, paddr, prot, mmu_idx, page_size); - return 0; - } - /* XXX */ - return 1; -} - -void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUState *env) -{ - unsigned int i; - const char *mask; - - (*cpu_fprintf)(f, "MMU contexts: Primary: %" PRId64 ", Secondary: %" - PRId64 "\n", - env->dmmu.mmu_primary_context, - env->dmmu.mmu_secondary_context); - if ((env->lsu & DMMU_E) == 0) { - (*cpu_fprintf)(f, "DMMU disabled\n"); - } else { - (*cpu_fprintf)(f, "DMMU dump\n"); - for (i = 0; i < 64; i++) { - switch (TTE_PGSIZE(env->dtlb[i].tte)) { - default: - case 0x0: - mask = " 8k"; - break; - case 0x1: - mask = " 64k"; - break; - case 0x2: - mask = "512k"; - break; - case 0x3: - mask = " 4M"; - break; - } - if (TTE_IS_VALID(env->dtlb[i].tte)) { - (*cpu_fprintf)(f, "[%02u] VA: %" PRIx64 ", PA: %llx" - ", %s, %s, %s, %s, ctx %" PRId64 " %s\n", - i, - env->dtlb[i].tag & (uint64_t)~0x1fffULL, - TTE_PA(env->dtlb[i].tte), - mask, - TTE_IS_PRIV(env->dtlb[i].tte) ? "priv" : "user", - TTE_IS_W_OK(env->dtlb[i].tte) ? "RW" : "RO", - TTE_IS_LOCKED(env->dtlb[i].tte) ? - "locked" : "unlocked", - env->dtlb[i].tag & (uint64_t)0x1fffULL, - TTE_IS_GLOBAL(env->dtlb[i].tte) ? - "global" : "local"); - } - } - } - if ((env->lsu & IMMU_E) == 0) { - (*cpu_fprintf)(f, "IMMU disabled\n"); - } else { - (*cpu_fprintf)(f, "IMMU dump\n"); - for (i = 0; i < 64; i++) { - switch (TTE_PGSIZE(env->itlb[i].tte)) { - default: - case 0x0: - mask = " 8k"; - break; - case 0x1: - mask = " 64k"; - break; - case 0x2: - mask = "512k"; - break; - case 0x3: - mask = " 4M"; - break; - } - if (TTE_IS_VALID(env->itlb[i].tte)) { - (*cpu_fprintf)(f, "[%02u] VA: %" PRIx64 ", PA: %llx" - ", %s, %s, %s, ctx %" PRId64 " %s\n", - i, - env->itlb[i].tag & (uint64_t)~0x1fffULL, - TTE_PA(env->itlb[i].tte), - mask, - TTE_IS_PRIV(env->itlb[i].tte) ? "priv" : "user", - TTE_IS_LOCKED(env->itlb[i].tte) ? - "locked" : "unlocked", - env->itlb[i].tag & (uint64_t)0x1fffULL, - TTE_IS_GLOBAL(env->itlb[i].tte) ? - "global" : "local"); - } - } - } -} - -#endif /* TARGET_SPARC64 */ - -static int cpu_sparc_get_phys_page(CPUState *env, target_phys_addr_t *phys, - target_ulong addr, int rw, int mmu_idx) -{ - target_ulong page_size; - int prot, access_index; - - return get_physical_address(env, phys, &prot, &access_index, addr, rw, - mmu_idx, &page_size); -} - -#if defined(TARGET_SPARC64) -target_phys_addr_t cpu_get_phys_page_nofault(CPUState *env, target_ulong addr, - int mmu_idx) -{ - target_phys_addr_t phys_addr; - - if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 4, mmu_idx) != 0) { - return -1; - } - return phys_addr; -} -#endif - -target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) -{ - target_phys_addr_t phys_addr; - int mmu_idx = cpu_mmu_index(env); - - if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 2, mmu_idx) != 0) { - if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 0, mmu_idx) != 0) { - return -1; - } - } - if (cpu_get_physical_page_desc(phys_addr) == IO_MEM_UNASSIGNED) { - return -1; - } - return phys_addr; -} -#endif - -/* misc op helpers */ void helper_raise_exception(CPUState *env, int tt) { env->exception_index = tt; diff --git a/target-sparc/mmu_helper.c b/target-sparc/mmu_helper.c new file mode 100644 index 0000000000..57430815e0 --- /dev/null +++ b/target-sparc/mmu_helper.c @@ -0,0 +1,877 @@ +/* + * Sparc MMU helpers + * + * Copyright (c) 2003-2005 Fabrice Bellard + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "cpu.h" + +//#define DEBUG_MMU + +#ifdef DEBUG_MMU +#define DPRINTF_MMU(fmt, ...) \ + do { printf("MMU: " fmt , ## __VA_ARGS__); } while (0) +#else +#define DPRINTF_MMU(fmt, ...) do {} while (0) +#endif + +/* Sparc MMU emulation */ + +#if defined(CONFIG_USER_ONLY) + +int cpu_sparc_handle_mmu_fault(CPUState *env1, target_ulong address, int rw, + int mmu_idx) +{ + if (rw & 2) { + env1->exception_index = TT_TFAULT; + } else { + env1->exception_index = TT_DFAULT; + } + return 1; +} + +#else + +#ifndef TARGET_SPARC64 +/* + * Sparc V8 Reference MMU (SRMMU) + */ +static const int access_table[8][8] = { + { 0, 0, 0, 0, 8, 0, 12, 12 }, + { 0, 0, 0, 0, 8, 0, 0, 0 }, + { 8, 8, 0, 0, 0, 8, 12, 12 }, + { 8, 8, 0, 0, 0, 8, 0, 0 }, + { 8, 0, 8, 0, 8, 8, 12, 12 }, + { 8, 0, 8, 0, 8, 0, 8, 0 }, + { 8, 8, 8, 0, 8, 8, 12, 12 }, + { 8, 8, 8, 0, 8, 8, 8, 0 } +}; + +static const int perm_table[2][8] = { + { + PAGE_READ, + PAGE_READ | PAGE_WRITE, + PAGE_READ | PAGE_EXEC, + PAGE_READ | PAGE_WRITE | PAGE_EXEC, + PAGE_EXEC, + PAGE_READ | PAGE_WRITE, + PAGE_READ | PAGE_EXEC, + PAGE_READ | PAGE_WRITE | PAGE_EXEC + }, + { + PAGE_READ, + PAGE_READ | PAGE_WRITE, + PAGE_READ | PAGE_EXEC, + PAGE_READ | PAGE_WRITE | PAGE_EXEC, + PAGE_EXEC, + PAGE_READ, + 0, + 0, + } +}; + +static int get_physical_address(CPUState *env, target_phys_addr_t *physical, + int *prot, int *access_index, + target_ulong address, int rw, int mmu_idx, + target_ulong *page_size) +{ + int access_perms = 0; + target_phys_addr_t pde_ptr; + uint32_t pde; + int error_code = 0, is_dirty, is_user; + unsigned long page_offset; + + is_user = mmu_idx == MMU_USER_IDX; + + if ((env->mmuregs[0] & MMU_E) == 0) { /* MMU disabled */ + *page_size = TARGET_PAGE_SIZE; + /* Boot mode: instruction fetches are taken from PROM */ + if (rw == 2 && (env->mmuregs[0] & env->def->mmu_bm)) { + *physical = env->prom_addr | (address & 0x7ffffULL); + *prot = PAGE_READ | PAGE_EXEC; + return 0; + } + *physical = address; + *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; + return 0; + } + + *access_index = ((rw & 1) << 2) | (rw & 2) | (is_user ? 0 : 1); + *physical = 0xffffffffffff0000ULL; + + /* SPARC reference MMU table walk: Context table->L1->L2->PTE */ + /* Context base + context number */ + pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2); + pde = ldl_phys(pde_ptr); + + /* Ctx pde */ + switch (pde & PTE_ENTRYTYPE_MASK) { + default: + case 0: /* Invalid */ + return 1 << 2; + case 2: /* L0 PTE, maybe should not happen? */ + case 3: /* Reserved */ + return 4 << 2; + case 1: /* L0 PDE */ + pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4); + pde = ldl_phys(pde_ptr); + + switch (pde & PTE_ENTRYTYPE_MASK) { + default: + case 0: /* Invalid */ + return (1 << 8) | (1 << 2); + case 3: /* Reserved */ + return (1 << 8) | (4 << 2); + case 1: /* L1 PDE */ + pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4); + pde = ldl_phys(pde_ptr); + + switch (pde & PTE_ENTRYTYPE_MASK) { + default: + case 0: /* Invalid */ + return (2 << 8) | (1 << 2); + case 3: /* Reserved */ + return (2 << 8) | (4 << 2); + case 1: /* L2 PDE */ + pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4); + pde = ldl_phys(pde_ptr); + + switch (pde & PTE_ENTRYTYPE_MASK) { + default: + case 0: /* Invalid */ + return (3 << 8) | (1 << 2); + case 1: /* PDE, should not happen */ + case 3: /* Reserved */ + return (3 << 8) | (4 << 2); + case 2: /* L3 PTE */ + page_offset = (address & TARGET_PAGE_MASK) & + (TARGET_PAGE_SIZE - 1); + } + *page_size = TARGET_PAGE_SIZE; + break; + case 2: /* L2 PTE */ + page_offset = address & 0x3ffff; + *page_size = 0x40000; + } + break; + case 2: /* L1 PTE */ + page_offset = address & 0xffffff; + *page_size = 0x1000000; + } + } + + /* check access */ + access_perms = (pde & PTE_ACCESS_MASK) >> PTE_ACCESS_SHIFT; + error_code = access_table[*access_index][access_perms]; + if (error_code && !((env->mmuregs[0] & MMU_NF) && is_user)) { + return error_code; + } + + /* update page modified and dirty bits */ + is_dirty = (rw & 1) && !(pde & PG_MODIFIED_MASK); + if (!(pde & PG_ACCESSED_MASK) || is_dirty) { + pde |= PG_ACCESSED_MASK; + if (is_dirty) { + pde |= PG_MODIFIED_MASK; + } + stl_phys_notdirty(pde_ptr, pde); + } + + /* the page can be put in the TLB */ + *prot = perm_table[is_user][access_perms]; + if (!(pde & PG_MODIFIED_MASK)) { + /* only set write access if already dirty... otherwise wait + for dirty access */ + *prot &= ~PAGE_WRITE; + } + + /* Even if large ptes, we map only one 4KB page in the cache to + avoid filling it too fast */ + *physical = ((target_phys_addr_t)(pde & PTE_ADDR_MASK) << 4) + page_offset; + return error_code; +} + +/* Perform address translation */ +int cpu_sparc_handle_mmu_fault(CPUState *env, target_ulong address, int rw, + int mmu_idx) +{ + target_phys_addr_t paddr; + target_ulong vaddr; + target_ulong page_size; + int error_code = 0, prot, access_index; + + error_code = get_physical_address(env, &paddr, &prot, &access_index, + address, rw, mmu_idx, &page_size); + if (error_code == 0) { + vaddr = address & TARGET_PAGE_MASK; + paddr &= TARGET_PAGE_MASK; +#ifdef DEBUG_MMU + printf("Translate at " TARGET_FMT_lx " -> " TARGET_FMT_plx ", vaddr " + TARGET_FMT_lx "\n", address, paddr, vaddr); +#endif + tlb_set_page(env, vaddr, paddr, prot, mmu_idx, page_size); + return 0; + } + + if (env->mmuregs[3]) { /* Fault status register */ + env->mmuregs[3] = 1; /* overflow (not read before another fault) */ + } + env->mmuregs[3] |= (access_index << 5) | error_code | 2; + env->mmuregs[4] = address; /* Fault address register */ + + if ((env->mmuregs[0] & MMU_NF) || env->psret == 0) { + /* No fault mode: if a mapping is available, just override + permissions. If no mapping is available, redirect accesses to + neverland. Fake/overridden mappings will be flushed when + switching to normal mode. */ + vaddr = address & TARGET_PAGE_MASK; + prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; + tlb_set_page(env, vaddr, paddr, prot, mmu_idx, TARGET_PAGE_SIZE); + return 0; + } else { + if (rw & 2) { + env->exception_index = TT_TFAULT; + } else { + env->exception_index = TT_DFAULT; + } + return 1; + } +} + +target_ulong mmu_probe(CPUState *env, target_ulong address, int mmulev) +{ + target_phys_addr_t pde_ptr; + uint32_t pde; + + /* Context base + context number */ + pde_ptr = (target_phys_addr_t)(env->mmuregs[1] << 4) + + (env->mmuregs[2] << 2); + pde = ldl_phys(pde_ptr); + + switch (pde & PTE_ENTRYTYPE_MASK) { + default: + case 0: /* Invalid */ + case 2: /* PTE, maybe should not happen? */ + case 3: /* Reserved */ + return 0; + case 1: /* L1 PDE */ + if (mmulev == 3) { + return pde; + } + pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4); + pde = ldl_phys(pde_ptr); + + switch (pde & PTE_ENTRYTYPE_MASK) { + default: + case 0: /* Invalid */ + case 3: /* Reserved */ + return 0; + case 2: /* L1 PTE */ + return pde; + case 1: /* L2 PDE */ + if (mmulev == 2) { + return pde; + } + pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4); + pde = ldl_phys(pde_ptr); + + switch (pde & PTE_ENTRYTYPE_MASK) { + default: + case 0: /* Invalid */ + case 3: /* Reserved */ + return 0; + case 2: /* L2 PTE */ + return pde; + case 1: /* L3 PDE */ + if (mmulev == 1) { + return pde; + } + pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4); + pde = ldl_phys(pde_ptr); + + switch (pde & PTE_ENTRYTYPE_MASK) { + default: + case 0: /* Invalid */ + case 1: /* PDE, should not happen */ + case 3: /* Reserved */ + return 0; + case 2: /* L3 PTE */ + return pde; + } + } + } + } + return 0; +} + +void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUState *env) +{ + target_ulong va, va1, va2; + unsigned int n, m, o; + target_phys_addr_t pde_ptr, pa; + uint32_t pde; + + pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2); + pde = ldl_phys(pde_ptr); + (*cpu_fprintf)(f, "Root ptr: " TARGET_FMT_plx ", ctx: %d\n", + (target_phys_addr_t)env->mmuregs[1] << 4, env->mmuregs[2]); + for (n = 0, va = 0; n < 256; n++, va += 16 * 1024 * 1024) { + pde = mmu_probe(env, va, 2); + if (pde) { + pa = cpu_get_phys_page_debug(env, va); + (*cpu_fprintf)(f, "VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_plx + " PDE: " TARGET_FMT_lx "\n", va, pa, pde); + for (m = 0, va1 = va; m < 64; m++, va1 += 256 * 1024) { + pde = mmu_probe(env, va1, 1); + if (pde) { + pa = cpu_get_phys_page_debug(env, va1); + (*cpu_fprintf)(f, " VA: " TARGET_FMT_lx ", PA: " + TARGET_FMT_plx " PDE: " TARGET_FMT_lx "\n", + va1, pa, pde); + for (o = 0, va2 = va1; o < 64; o++, va2 += 4 * 1024) { + pde = mmu_probe(env, va2, 0); + if (pde) { + pa = cpu_get_phys_page_debug(env, va2); + (*cpu_fprintf)(f, " VA: " TARGET_FMT_lx ", PA: " + TARGET_FMT_plx " PTE: " + TARGET_FMT_lx "\n", + va2, pa, pde); + } + } + } + } + } + } +} + +/* Gdb expects all registers windows to be flushed in ram. This function handles + * reads (and only reads) in stack frames as if windows were flushed. We assume + * that the sparc ABI is followed. + */ +int target_memory_rw_debug(CPUState *env, target_ulong addr, + uint8_t *buf, int len, int is_write) +{ + int i; + int len1; + int cwp = env->cwp; + + if (!is_write) { + for (i = 0; i < env->nwindows; i++) { + int off; + target_ulong fp = env->regbase[cwp * 16 + 22]; + + /* Assume fp == 0 means end of frame. */ + if (fp == 0) { + break; + } + + cwp = cpu_cwp_inc(env, cwp + 1); + + /* Invalid window ? */ + if (env->wim & (1 << cwp)) { + break; + } + + /* According to the ABI, the stack is growing downward. */ + if (addr + len < fp) { + break; + } + + /* Not in this frame. */ + if (addr > fp + 64) { + continue; + } + + /* Handle access before this window. */ + if (addr < fp) { + len1 = fp - addr; + if (cpu_memory_rw_debug(env, addr, buf, len1, is_write) != 0) { + return -1; + } + addr += len1; + len -= len1; + buf += len1; + } + + /* Access byte per byte to registers. Not very efficient but speed + * is not critical. + */ + off = addr - fp; + len1 = 64 - off; + + if (len1 > len) { + len1 = len; + } + + for (; len1; len1--) { + int reg = cwp * 16 + 8 + (off >> 2); + union { + uint32_t v; + uint8_t c[4]; + } u; + u.v = cpu_to_be32(env->regbase[reg]); + *buf++ = u.c[off & 3]; + addr++; + len--; + off++; + } + + if (len == 0) { + return 0; + } + } + } + return cpu_memory_rw_debug(env, addr, buf, len, is_write); +} + +#else /* !TARGET_SPARC64 */ + +/* 41 bit physical address space */ +static inline target_phys_addr_t ultrasparc_truncate_physical(uint64_t x) +{ + return x & 0x1ffffffffffULL; +} + +/* + * UltraSparc IIi I/DMMUs + */ + +/* Returns true if TTE tag is valid and matches virtual address value + in context requires virtual address mask value calculated from TTE + entry size */ +static inline int ultrasparc_tag_match(SparcTLBEntry *tlb, + uint64_t address, uint64_t context, + target_phys_addr_t *physical) +{ + uint64_t mask; + + switch (TTE_PGSIZE(tlb->tte)) { + default: + case 0x0: /* 8k */ + mask = 0xffffffffffffe000ULL; + break; + case 0x1: /* 64k */ + mask = 0xffffffffffff0000ULL; + break; + case 0x2: /* 512k */ + mask = 0xfffffffffff80000ULL; + break; + case 0x3: /* 4M */ + mask = 0xffffffffffc00000ULL; + break; + } + + /* valid, context match, virtual address match? */ + if (TTE_IS_VALID(tlb->tte) && + (TTE_IS_GLOBAL(tlb->tte) || tlb_compare_context(tlb, context)) + && compare_masked(address, tlb->tag, mask)) { + /* decode physical address */ + *physical = ((tlb->tte & mask) | (address & ~mask)) & 0x1ffffffe000ULL; + return 1; + } + + return 0; +} + +static int get_physical_address_data(CPUState *env, + target_phys_addr_t *physical, int *prot, + target_ulong address, int rw, int mmu_idx) +{ + unsigned int i; + uint64_t context; + uint64_t sfsr = 0; + + int is_user = (mmu_idx == MMU_USER_IDX || + mmu_idx == MMU_USER_SECONDARY_IDX); + + if ((env->lsu & DMMU_E) == 0) { /* DMMU disabled */ + *physical = ultrasparc_truncate_physical(address); + *prot = PAGE_READ | PAGE_WRITE; + return 0; + } + + switch (mmu_idx) { + case MMU_USER_IDX: + case MMU_KERNEL_IDX: + context = env->dmmu.mmu_primary_context & 0x1fff; + sfsr |= SFSR_CT_PRIMARY; + break; + case MMU_USER_SECONDARY_IDX: + case MMU_KERNEL_SECONDARY_IDX: + context = env->dmmu.mmu_secondary_context & 0x1fff; + sfsr |= SFSR_CT_SECONDARY; + break; + case MMU_NUCLEUS_IDX: + sfsr |= SFSR_CT_NUCLEUS; + /* FALLTHRU */ + default: + context = 0; + break; + } + + if (rw == 1) { + sfsr |= SFSR_WRITE_BIT; + } else if (rw == 4) { + sfsr |= SFSR_NF_BIT; + } + + for (i = 0; i < 64; i++) { + /* ctx match, vaddr match, valid? */ + if (ultrasparc_tag_match(&env->dtlb[i], address, context, physical)) { + int do_fault = 0; + + /* access ok? */ + /* multiple bits in SFSR.FT may be set on TT_DFAULT */ + if (TTE_IS_PRIV(env->dtlb[i].tte) && is_user) { + do_fault = 1; + sfsr |= SFSR_FT_PRIV_BIT; /* privilege violation */ + + DPRINTF_MMU("DFAULT at %" PRIx64 " context %" PRIx64 + " mmu_idx=%d tl=%d\n", + address, context, mmu_idx, env->tl); + } + if (rw == 4) { + if (TTE_IS_SIDEEFFECT(env->dtlb[i].tte)) { + do_fault = 1; + sfsr |= SFSR_FT_NF_E_BIT; + } + } else { + if (TTE_IS_NFO(env->dtlb[i].tte)) { + do_fault = 1; + sfsr |= SFSR_FT_NFO_BIT; + } + } + + if (do_fault) { + /* faults above are reported with TT_DFAULT. */ + env->exception_index = TT_DFAULT; + } else if (!TTE_IS_W_OK(env->dtlb[i].tte) && (rw == 1)) { + do_fault = 1; + env->exception_index = TT_DPROT; + + DPRINTF_MMU("DPROT at %" PRIx64 " context %" PRIx64 + " mmu_idx=%d tl=%d\n", + address, context, mmu_idx, env->tl); + } + + if (!do_fault) { + *prot = PAGE_READ; + if (TTE_IS_W_OK(env->dtlb[i].tte)) { + *prot |= PAGE_WRITE; + } + + TTE_SET_USED(env->dtlb[i].tte); + + return 0; + } + + if (env->dmmu.sfsr & SFSR_VALID_BIT) { /* Fault status register */ + sfsr |= SFSR_OW_BIT; /* overflow (not read before + another fault) */ + } + + if (env->pstate & PS_PRIV) { + sfsr |= SFSR_PR_BIT; + } + + /* FIXME: ASI field in SFSR must be set */ + env->dmmu.sfsr = sfsr | SFSR_VALID_BIT; + + env->dmmu.sfar = address; /* Fault address register */ + + env->dmmu.tag_access = (address & ~0x1fffULL) | context; + + return 1; + } + } + + DPRINTF_MMU("DMISS at %" PRIx64 " context %" PRIx64 "\n", + address, context); + + /* + * On MMU misses: + * - UltraSPARC IIi: SFSR and SFAR unmodified + * - JPS1: SFAR updated and some fields of SFSR updated + */ + env->dmmu.tag_access = (address & ~0x1fffULL) | context; + env->exception_index = TT_DMISS; + return 1; +} + +static int get_physical_address_code(CPUState *env, + target_phys_addr_t *physical, int *prot, + target_ulong address, int mmu_idx) +{ + unsigned int i; + uint64_t context; + + int is_user = (mmu_idx == MMU_USER_IDX || + mmu_idx == MMU_USER_SECONDARY_IDX); + + if ((env->lsu & IMMU_E) == 0 || (env->pstate & PS_RED) != 0) { + /* IMMU disabled */ + *physical = ultrasparc_truncate_physical(address); + *prot = PAGE_EXEC; + return 0; + } + + if (env->tl == 0) { + /* PRIMARY context */ + context = env->dmmu.mmu_primary_context & 0x1fff; + } else { + /* NUCLEUS context */ + context = 0; + } + + for (i = 0; i < 64; i++) { + /* ctx match, vaddr match, valid? */ + if (ultrasparc_tag_match(&env->itlb[i], + address, context, physical)) { + /* access ok? */ + if (TTE_IS_PRIV(env->itlb[i].tte) && is_user) { + /* Fault status register */ + if (env->immu.sfsr & SFSR_VALID_BIT) { + env->immu.sfsr = SFSR_OW_BIT; /* overflow (not read before + another fault) */ + } else { + env->immu.sfsr = 0; + } + if (env->pstate & PS_PRIV) { + env->immu.sfsr |= SFSR_PR_BIT; + } + if (env->tl > 0) { + env->immu.sfsr |= SFSR_CT_NUCLEUS; + } + + /* FIXME: ASI field in SFSR must be set */ + env->immu.sfsr |= SFSR_FT_PRIV_BIT | SFSR_VALID_BIT; + env->exception_index = TT_TFAULT; + + env->immu.tag_access = (address & ~0x1fffULL) | context; + + DPRINTF_MMU("TFAULT at %" PRIx64 " context %" PRIx64 "\n", + address, context); + + return 1; + } + *prot = PAGE_EXEC; + TTE_SET_USED(env->itlb[i].tte); + return 0; + } + } + + DPRINTF_MMU("TMISS at %" PRIx64 " context %" PRIx64 "\n", + address, context); + + /* Context is stored in DMMU (dmmuregs[1]) also for IMMU */ + env->immu.tag_access = (address & ~0x1fffULL) | context; + env->exception_index = TT_TMISS; + return 1; +} + +static int get_physical_address(CPUState *env, target_phys_addr_t *physical, + int *prot, int *access_index, + target_ulong address, int rw, int mmu_idx, + target_ulong *page_size) +{ + /* ??? We treat everything as a small page, then explicitly flush + everything when an entry is evicted. */ + *page_size = TARGET_PAGE_SIZE; + +#if defined(DEBUG_MMU) + /* safety net to catch wrong softmmu index use from dynamic code */ + if (env->tl > 0 && mmu_idx != MMU_NUCLEUS_IDX) { + DPRINTF_MMU("get_physical_address %s tl=%d mmu_idx=%d" + " primary context=%" PRIx64 + " secondary context=%" PRIx64 + " address=%" PRIx64 + "\n", + (rw == 2 ? "CODE" : "DATA"), + env->tl, mmu_idx, + env->dmmu.mmu_primary_context, + env->dmmu.mmu_secondary_context, + address); + } +#endif + + if (rw == 2) { + return get_physical_address_code(env, physical, prot, address, + mmu_idx); + } else { + return get_physical_address_data(env, physical, prot, address, rw, + mmu_idx); + } +} + +/* Perform address translation */ +int cpu_sparc_handle_mmu_fault(CPUState *env, target_ulong address, int rw, + int mmu_idx) +{ + target_ulong virt_addr, vaddr; + target_phys_addr_t paddr; + target_ulong page_size; + int error_code = 0, prot, access_index; + + error_code = get_physical_address(env, &paddr, &prot, &access_index, + address, rw, mmu_idx, &page_size); + if (error_code == 0) { + virt_addr = address & TARGET_PAGE_MASK; + vaddr = virt_addr + ((address & TARGET_PAGE_MASK) & + (TARGET_PAGE_SIZE - 1)); + + DPRINTF_MMU("Translate at %" PRIx64 " -> %" PRIx64 "," + " vaddr %" PRIx64 + " mmu_idx=%d" + " tl=%d" + " primary context=%" PRIx64 + " secondary context=%" PRIx64 + "\n", + address, paddr, vaddr, mmu_idx, env->tl, + env->dmmu.mmu_primary_context, + env->dmmu.mmu_secondary_context); + + tlb_set_page(env, vaddr, paddr, prot, mmu_idx, page_size); + return 0; + } + /* XXX */ + return 1; +} + +void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUState *env) +{ + unsigned int i; + const char *mask; + + (*cpu_fprintf)(f, "MMU contexts: Primary: %" PRId64 ", Secondary: %" + PRId64 "\n", + env->dmmu.mmu_primary_context, + env->dmmu.mmu_secondary_context); + if ((env->lsu & DMMU_E) == 0) { + (*cpu_fprintf)(f, "DMMU disabled\n"); + } else { + (*cpu_fprintf)(f, "DMMU dump\n"); + for (i = 0; i < 64; i++) { + switch (TTE_PGSIZE(env->dtlb[i].tte)) { + default: + case 0x0: + mask = " 8k"; + break; + case 0x1: + mask = " 64k"; + break; + case 0x2: + mask = "512k"; + break; + case 0x3: + mask = " 4M"; + break; + } + if (TTE_IS_VALID(env->dtlb[i].tte)) { + (*cpu_fprintf)(f, "[%02u] VA: %" PRIx64 ", PA: %llx" + ", %s, %s, %s, %s, ctx %" PRId64 " %s\n", + i, + env->dtlb[i].tag & (uint64_t)~0x1fffULL, + TTE_PA(env->dtlb[i].tte), + mask, + TTE_IS_PRIV(env->dtlb[i].tte) ? "priv" : "user", + TTE_IS_W_OK(env->dtlb[i].tte) ? "RW" : "RO", + TTE_IS_LOCKED(env->dtlb[i].tte) ? + "locked" : "unlocked", + env->dtlb[i].tag & (uint64_t)0x1fffULL, + TTE_IS_GLOBAL(env->dtlb[i].tte) ? + "global" : "local"); + } + } + } + if ((env->lsu & IMMU_E) == 0) { + (*cpu_fprintf)(f, "IMMU disabled\n"); + } else { + (*cpu_fprintf)(f, "IMMU dump\n"); + for (i = 0; i < 64; i++) { + switch (TTE_PGSIZE(env->itlb[i].tte)) { + default: + case 0x0: + mask = " 8k"; + break; + case 0x1: + mask = " 64k"; + break; + case 0x2: + mask = "512k"; + break; + case 0x3: + mask = " 4M"; + break; + } + if (TTE_IS_VALID(env->itlb[i].tte)) { + (*cpu_fprintf)(f, "[%02u] VA: %" PRIx64 ", PA: %llx" + ", %s, %s, %s, ctx %" PRId64 " %s\n", + i, + env->itlb[i].tag & (uint64_t)~0x1fffULL, + TTE_PA(env->itlb[i].tte), + mask, + TTE_IS_PRIV(env->itlb[i].tte) ? "priv" : "user", + TTE_IS_LOCKED(env->itlb[i].tte) ? + "locked" : "unlocked", + env->itlb[i].tag & (uint64_t)0x1fffULL, + TTE_IS_GLOBAL(env->itlb[i].tte) ? + "global" : "local"); + } + } + } +} + +#endif /* TARGET_SPARC64 */ + +static int cpu_sparc_get_phys_page(CPUState *env, target_phys_addr_t *phys, + target_ulong addr, int rw, int mmu_idx) +{ + target_ulong page_size; + int prot, access_index; + + return get_physical_address(env, phys, &prot, &access_index, addr, rw, + mmu_idx, &page_size); +} + +#if defined(TARGET_SPARC64) +target_phys_addr_t cpu_get_phys_page_nofault(CPUState *env, target_ulong addr, + int mmu_idx) +{ + target_phys_addr_t phys_addr; + + if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 4, mmu_idx) != 0) { + return -1; + } + return phys_addr; +} +#endif + +target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) +{ + target_phys_addr_t phys_addr; + int mmu_idx = cpu_mmu_index(env); + + if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 2, mmu_idx) != 0) { + if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 0, mmu_idx) != 0) { + return -1; + } + } + if (cpu_get_physical_page_desc(phys_addr) == IO_MEM_UNASSIGNED) { + return -1; + } + return phys_addr; +} +#endif |