static int get_physical_address (CPUMIPSState *env, hwaddr *physical, int *prot, target_ulong real_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; /* effective address (modified for KVM T&E kernel segments) */ target_ulong address = real_address; #define USEG_LIMIT 0x7FFFFFFFUL #define KSEG0_BASE 0x80000000UL #define KSEG1_BASE 0xA0000000UL #define KSEG2_BASE 0xC0000000UL #define KSEG3_BASE 0xE0000000UL #define KVM_KSEG0_BASE 0x40000000UL #define KVM_KSEG2_BASE 0x60000000UL if (kvm_enabled()) { /* KVM T&E adds guest kernel segments in useg */ if (real_address >= KVM_KSEG0_BASE) { if (real_address < KVM_KSEG2_BASE) { /* kseg0 */ address += KSEG0_BASE - KVM_KSEG0_BASE; } else if (real_address <= USEG_LIMIT) { /* kseg2/3 */ address += KSEG2_BASE - KVM_KSEG2_BASE; } } } if (address <= USEG_LIMIT) { /* 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, real_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, real_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, real_address, rw, access_type); } else { ret = TLBRET_BADADDR; } } else if (address < 0xC000000000000000ULL) { /* xkphys */ if (kernel_mode && KX && (address & 0x07FFFFFFFFFFFFFFULL) <= env->PAMask) { *physical = address & env->PAMask; *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, real_address, rw, access_type); } else { ret = TLBRET_BADADDR; } #endif } else if (address < (int32_t)KSEG1_BASE) { /* kseg0 */ if (kernel_mode) { *physical = address - (int32_t)KSEG0_BASE; *prot = PAGE_READ | PAGE_WRITE; } else { ret = TLBRET_BADADDR; } } else if (address < (int32_t)KSEG2_BASE) { /* kseg1 */ if (kernel_mode) { *physical = address - (int32_t)KSEG1_BASE; *prot = PAGE_READ | PAGE_WRITE; } else { ret = TLBRET_BADADDR; } } else if (address < (int32_t)KSEG3_BASE) { /* sseg (kseg2) */ if (supervisor_mode || kernel_mode) { ret = env->tlb->map_address(env, physical, prot, real_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, real_address, rw, access_type); } else { ret = TLBRET_BADADDR; } } return ret; }