diff options
Diffstat (limited to 'target/m68k/helper.c')
| -rw-r--r-- | target/m68k/helper.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/target/m68k/helper.c b/target/m68k/helper.c index 80db0b75b0..9fd9d3f1ff 100644 --- a/target/m68k/helper.c +++ b/target/m68k/helper.c @@ -221,6 +221,9 @@ void HELPER(m68k_movec_to)(CPUM68KState *env, uint32_t reg, uint32_t val) case M68K_CR_TC: env->mmu.tcr = val; return; + case M68K_CR_MMUSR: + env->mmu.mmusr = val; + return; case M68K_CR_SRP: env->mmu.srp = val; return; @@ -272,6 +275,8 @@ uint32_t HELPER(m68k_movec_from)(CPUM68KState *env, uint32_t reg) /* MC680[34]0 */ case M68K_CR_TC: return env->mmu.tcr; + case M68K_CR_MMUSR: + return env->mmu.mmusr; case M68K_CR_SRP: return env->mmu.srp; case M68K_CR_USP: @@ -433,6 +438,10 @@ static int get_physical_address(CPUM68KState *env, hwaddr *physical, for (i = 0; i < M68K_MAX_TTR; i++) { if (check_TTR(env->mmu.TTR(access_type, i), prot, address, access_type)) { + if (access_type & ACCESS_PTEST) { + /* Transparent Translation Register bit */ + env->mmu.mmusr = M68K_MMU_T_040 | M68K_MMU_R_040; + } *physical = address & TARGET_PAGE_MASK; *page_size = TARGET_PAGE_SIZE; return 0; @@ -461,6 +470,9 @@ static int get_physical_address(CPUM68KState *env, hwaddr *physical, stl_phys(cs->as, entry, next | M68K_DESC_USED); } if (next & M68K_DESC_WRITEPROT) { + if (access_type & ACCESS_PTEST) { + env->mmu.mmusr |= M68K_MMU_WP_040; + } *prot &= ~PAGE_WRITE; if (access_type & ACCESS_STORE) { return -1; @@ -478,6 +490,9 @@ static int get_physical_address(CPUM68KState *env, hwaddr *physical, stl_phys(cs->as, entry, next | M68K_DESC_USED); } if (next & M68K_DESC_WRITEPROT) { + if (access_type & ACCESS_PTEST) { + env->mmu.mmusr |= M68K_MMU_WP_040; + } *prot &= ~PAGE_WRITE; if (access_type & ACCESS_STORE) { return -1; @@ -524,6 +539,12 @@ static int get_physical_address(CPUM68KState *env, hwaddr *physical, page_mask = ~(*page_size - 1); *physical = next & page_mask; + if (access_type & ACCESS_PTEST) { + env->mmu.mmusr |= next & M68K_MMU_SR_MASK_040; + env->mmu.mmusr |= *physical & 0xfffff000; + env->mmu.mmusr |= M68K_MMU_R_040; + } + if (next & M68K_DESC_WRITEPROT) { *prot &= ~PAGE_WRITE; if (access_type & ACCESS_STORE) { @@ -1078,6 +1099,58 @@ void HELPER(set_mac_extu)(CPUM68KState *env, uint32_t val, uint32_t acc) } #if defined(CONFIG_SOFTMMU) +void HELPER(ptest)(CPUM68KState *env, uint32_t addr, uint32_t is_read) +{ + M68kCPU *cpu = m68k_env_get_cpu(env); + CPUState *cs = CPU(cpu); + hwaddr physical; + int access_type; + int prot; + int ret; + target_ulong page_size; + + access_type = ACCESS_PTEST; + if (env->dfc & 4) { + access_type |= ACCESS_SUPER; + } + if ((env->dfc & 3) == 2) { + access_type |= ACCESS_CODE; + } + if (!is_read) { + access_type |= ACCESS_STORE; + } + + env->mmu.mmusr = 0; + env->mmu.ssw = 0; + ret = get_physical_address(env, &physical, &prot, addr, + access_type, &page_size); + if (ret == 0) { + addr &= TARGET_PAGE_MASK; + physical += addr & (page_size - 1); + tlb_set_page(cs, addr, physical, + prot, access_type & ACCESS_SUPER ? + MMU_KERNEL_IDX : MMU_USER_IDX, page_size); + } +} + +void HELPER(pflush)(CPUM68KState *env, uint32_t addr, uint32_t opmode) +{ + M68kCPU *cpu = m68k_env_get_cpu(env); + + switch (opmode) { + case 0: /* Flush page entry if not global */ + case 1: /* Flush page entry */ + tlb_flush_page(CPU(cpu), addr); + break; + case 2: /* Flush all except global entries */ + tlb_flush(CPU(cpu)); + break; + case 3: /* Flush all entries */ + tlb_flush(CPU(cpu)); + break; + } +} + void HELPER(reset)(CPUM68KState *env) { /* FIXME: reset all except CPU */ |