static int get_physical_address (CPUState *env, target_ulong *physical, int *prot, target_ulong address, int rw, int access_type) { /* User mode can only access useg/xuseg */ int user_mode = (env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM; int supervisor_mode = (env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_SM; int kernel_mode = !user_mode && !supervisor_mode; #if defined(TARGET_MIPS64) int UX = (env->CP0_Status & (1 << CP0St_UX)) != 0; int SX = (env->CP0_Status & (1 << CP0St_SX)) != 0; int KX = (env->CP0_Status & (1 << CP0St_KX)) != 0; #endif int ret = TLBRET_MATCH; #if 0 if (logfile) { fprintf(logfile, "user mode %d h %08x\n", user_mode, env->hflags); } #endif if (address <= (int32_t)0x7FFFFFFFUL) { /* useg */ if (env->CP0_Status & (1 << CP0St_ERL)) { *physical = address & 0xFFFFFFFF; *prot = PAGE_READ | PAGE_WRITE; } else { ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); } #if defined(TARGET_MIPS64) } else if (address < 0x4000000000000000ULL) { /* xuseg */ if (UX && address < (0x3FFFFFFFFFFFFFFFULL & env->SEGMask)) { ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); } else { ret = TLBRET_BADADDR; } } else if (address < 0x8000000000000000ULL) { /* xsseg */ if ((supervisor_mode || kernel_mode) && SX && address < (0x7FFFFFFFFFFFFFFFULL & env->SEGMask)) { ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); } else { ret = TLBRET_BADADDR; } } else if (address < 0xC000000000000000ULL) { /* xkphys */ /* XXX: Assumes PABITS = 36 (correct for MIPS64R1) */ if (kernel_mode && KX && (address & 0x07FFFFFFFFFFFFFFULL) < 0x0000000FFFFFFFFFULL) { *physical = address & 0x0000000FFFFFFFFFULL; *prot = PAGE_READ | PAGE_WRITE; } else { ret = TLBRET_BADADDR; } } else if (address < 0xFFFFFFFF80000000ULL) { /* xkseg */ if (kernel_mode && KX && address < (0xFFFFFFFF7FFFFFFFULL & env->SEGMask)) { ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); } else { ret = TLBRET_BADADDR; } #endif } else if (address < (int32_t)0xA0000000UL) { /* kseg0 */ if (kernel_mode) { *physical = address - (int32_t)0x80000000UL; *prot = PAGE_READ | PAGE_WRITE; } else { ret = TLBRET_BADADDR; } } else if (address < (int32_t)0xC0000000UL) { /* kseg1 */ if (kernel_mode) { *physical = address - (int32_t)0xA0000000UL; *prot = PAGE_READ | PAGE_WRITE; } else { ret = TLBRET_BADADDR; } } else if (address < (int32_t)0xE0000000UL) { /* sseg (kseg2) */ if (supervisor_mode || kernel_mode) { ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); } else { ret = TLBRET_BADADDR; } } else { /* kseg3 */ /* XXX: debug segment is not emulated */ if (kernel_mode) { ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); } else { ret = TLBRET_BADADDR; } } #if 0 if (logfile) { fprintf(logfile, TARGET_FMT_lx " %d %d => " TARGET_FMT_lx " %d (%d)\n", address, rw, access_type, *physical, *prot, ret); } #endif return ret; }