diff options
Diffstat (limited to 'target-sh4')
| -rw-r--r-- | target-sh4/helper.c | 65 |
1 files changed, 29 insertions, 36 deletions
diff --git a/target-sh4/helper.c b/target-sh4/helper.c index 6429862084..c536015cfe 100644 --- a/target-sh4/helper.c +++ b/target-sh4/helper.c @@ -43,13 +43,14 @@ int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw, env->exception_index = 0; switch (rw) { case 0: - env->tea = address; env->exception_index = 0x0a0; break; case 1: - env->tea = address; env->exception_index = 0x0c0; break; + case 2: + env->exception_index = 0x0a0; + break; } return 1; } @@ -72,6 +73,9 @@ target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr) #define MMU_DTLB_VIOLATION_WRITE (-8) #define MMU_DTLB_MULTIPLE (-9) #define MMU_DTLB_MISS (-10) +#define MMU_IADDR_ERROR (-11) +#define MMU_DADDR_ERROR_READ (-12) +#define MMU_DADDR_ERROR_WRITE (-13) void do_interrupt(CPUState * env) { @@ -353,20 +357,19 @@ int find_utlb_entry(CPUState * env, target_ulong address, int use_asid) Return MMU_OK, MMU_DTLB_MISS_READ, MMU_DTLB_MISS_WRITE, MMU_DTLB_INITIAL_WRITE, MMU_DTLB_VIOLATION_READ, MMU_DTLB_VIOLATION_WRITE, MMU_ITLB_MISS, - MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION + MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION, + MMU_IADDR_ERROR, MMU_DADDR_ERROR_READ, MMU_DADDR_ERROR_WRITE. */ static int get_mmu_address(CPUState * env, target_ulong * physical, int *prot, target_ulong address, int rw, int access_type) { - int use_asid, is_code, n; + int use_asid, n; tlb_t *matching = NULL; use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0; - is_code = env->pc == address; /* Hack */ - /* Use a hack to find if this is an instruction or data access */ - if (env->pc == address && !(rw & PAGE_WRITE)) { + if (rw == 2) { n = find_itlb_entry(env, address, use_asid, 1); if (n >= 0) { matching = &env->itlb[n]; @@ -382,13 +385,13 @@ static int get_mmu_address(CPUState * env, target_ulong * physical, switch ((matching->pr << 1) | ((env->sr & SR_MD) ? 1 : 0)) { case 0: /* 000 */ case 2: /* 010 */ - n = (rw & PAGE_WRITE) ? MMU_DTLB_VIOLATION_WRITE : + n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE : MMU_DTLB_VIOLATION_READ; break; case 1: /* 001 */ case 4: /* 100 */ case 5: /* 101 */ - if (rw & PAGE_WRITE) + if (rw == 1) n = MMU_DTLB_VIOLATION_WRITE; else *prot = PAGE_READ; @@ -396,18 +399,18 @@ static int get_mmu_address(CPUState * env, target_ulong * physical, case 3: /* 011 */ case 6: /* 110 */ case 7: /* 111 */ - *prot = rw & (PAGE_READ | PAGE_WRITE); + *prot = (rw == 1)? PAGE_WRITE : PAGE_READ; break; } } else if (n == MMU_DTLB_MISS) { - n = (rw & PAGE_WRITE) ? MMU_DTLB_MISS_WRITE : + n = (rw == 1) ? MMU_DTLB_MISS_WRITE : MMU_DTLB_MISS_READ; } } if (n >= 0) { *physical = ((matching->ppn << 10) & ~(matching->size - 1)) | (address & (matching->size - 1)); - if ((rw & PAGE_WRITE) & !matching->d) + if ((rw == 1) & !matching->d) n = MMU_DTLB_INITIAL_WRITE; else n = MMU_OK; @@ -426,8 +429,12 @@ int get_physical_address(CPUState * env, target_ulong * physical, && (address < 0xe0000000 || address > 0xe4000000)) { /* Unauthorized access in user mode (only store queues are available) */ fprintf(stderr, "Unauthorized access\n"); - return (rw & PAGE_WRITE) ? MMU_DTLB_MISS_WRITE : - MMU_DTLB_MISS_READ; + if (rw == 0) + return MMU_DADDR_ERROR_READ; + else if (rw == 1) + return MMU_DADDR_ERROR_WRITE; + else + return MMU_IADDR_ERROR; } if (address >= 0x80000000 && address < 0xc0000000) { /* Mask upper 3 bits for P1 and P2 areas */ @@ -465,27 +472,6 @@ int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw, target_ulong physical, page_offset, page_size; int prot, ret, access_type; - switch (rw) { - case 0: - rw = PAGE_READ; - break; - case 1: - rw = PAGE_WRITE; - break; - case 2: /* READ_ACCESS_TYPE == 2 defined in softmmu_template.h */ - rw = PAGE_READ; - break; - default: - /* fatal error */ - assert(0); - } - - /* XXXXX */ -#if 0 - fprintf(stderr, "%s pc %08x ad %08x rw %d mmu_idx %d smmu %d\n", - __func__, env->pc, address, rw, mmu_idx, is_softmmu); -#endif - access_type = ACCESS_INT; ret = get_physical_address(env, &physical, &prot, address, rw, @@ -517,6 +503,13 @@ int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw, case MMU_DTLB_VIOLATION_WRITE: env->exception_index = 0x0c0; break; + case MMU_IADDR_ERROR: + case MMU_DADDR_ERROR_READ: + env->exception_index = 0x0c0; + break; + case MMU_DADDR_ERROR_WRITE: + env->exception_index = 0x100; + break; default: assert(0); } @@ -537,7 +530,7 @@ target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr) target_ulong physical; int prot; - get_physical_address(env, &physical, &prot, addr, PAGE_READ, 0); + get_physical_address(env, &physical, &prot, addr, 0, 0); return physical; } |