diff options
Diffstat (limited to 'target-sparc/helper.c')
| -rw-r--r-- | target-sparc/helper.c | 43 |
1 files changed, 27 insertions, 16 deletions
diff --git a/target-sparc/helper.c b/target-sparc/helper.c index 671d2f9b62..0269d2eecc 100644 --- a/target-sparc/helper.c +++ b/target-sparc/helper.c @@ -137,6 +137,8 @@ int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot return 0; } + *access_index = ((rw & 1) << 2) | (rw & 2) | (is_user? 0 : 1); + /* SPARC reference MMU table walk: Context table->L1->L2->PTE */ /* Context base + context number */ pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 4); @@ -146,10 +148,10 @@ int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot switch (pde & PTE_ENTRYTYPE_MASK) { default: case 0: /* Invalid */ - return 1; + return 1 << 2; case 2: /* L0 PTE, maybe should not happen? */ case 3: /* Reserved */ - return 4; + return 4 << 2; case 1: /* L0 PDE */ pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4); pde = ldl_phys(pde_ptr); @@ -157,9 +159,9 @@ int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot switch (pde & PTE_ENTRYTYPE_MASK) { default: case 0: /* Invalid */ - return 1; + return (1 << 8) | (1 << 2); case 3: /* Reserved */ - return 4; + return (1 << 8) | (4 << 2); case 1: /* L1 PDE */ pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4); pde = ldl_phys(pde_ptr); @@ -167,9 +169,9 @@ int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot switch (pde & PTE_ENTRYTYPE_MASK) { default: case 0: /* Invalid */ - return 1; + return (2 << 8) | (1 << 2); case 3: /* Reserved */ - return 4; + return (2 << 8) | (4 << 2); case 1: /* L2 PDE */ pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4); pde = ldl_phys(pde_ptr); @@ -177,10 +179,10 @@ int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot switch (pde & PTE_ENTRYTYPE_MASK) { default: case 0: /* Invalid */ - return 1; + return (3 << 8) | (1 << 2); case 1: /* PDE, should not happen */ case 3: /* Reserved */ - return 4; + return (3 << 8) | (4 << 2); case 2: /* L3 PTE */ virt_addr = address & TARGET_PAGE_MASK; page_offset = (address & TARGET_PAGE_MASK) & (TARGET_PAGE_SIZE - 1); @@ -206,7 +208,6 @@ int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot stl_phys_notdirty(pde_ptr, pde); } /* check access */ - *access_index = ((rw & 1) << 2) | (rw & 2) | (is_user? 0 : 1); access_perms = (pde & PTE_ACCESS_MASK) >> PTE_ACCESS_SHIFT; error_code = access_table[*access_index][access_perms]; if (error_code) @@ -246,18 +247,28 @@ int cpu_sparc_handle_mmu_fault (CPUState *env, target_ulong address, int rw, 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) | 2; + 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) { +#if 0 // No fault - cpu_abort(env, "Unsupported MMU no fault case"); + vaddr = address & TARGET_PAGE_MASK; + paddr = 0xfffff000; + prot = PAGE_READ | PAGE_WRITE; + ret = tlb_set_page(env, vaddr, paddr, prot, is_user, is_softmmu); + return ret; +#else + cpu_abort(env, "MMU no fault case no handled"); + return 0; +#endif + } else { + if (rw & 2) + env->exception_index = TT_TFAULT; + else + env->exception_index = TT_DFAULT; + return 1; } - if (rw & 2) - env->exception_index = TT_TFAULT; - else - env->exception_index = TT_DFAULT; - return 1; } #endif |