root / target-mips / helper.c @ a8170e5e
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/*
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* MIPS emulation helpers for qemu.
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*
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* Copyright (c) 2004-2005 Jocelyn Mayer
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdarg.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <inttypes.h> |
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#include <signal.h> |
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#include "cpu.h" |
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enum {
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TLBRET_DIRTY = -4,
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TLBRET_INVALID = -3,
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TLBRET_NOMATCH = -2,
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TLBRET_BADADDR = -1,
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TLBRET_MATCH = 0
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}; |
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#if !defined(CONFIG_USER_ONLY)
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/* no MMU emulation */
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int no_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot, |
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target_ulong address, int rw, int access_type) |
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{ |
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*physical = address; |
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*prot = PAGE_READ | PAGE_WRITE; |
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return TLBRET_MATCH;
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} |
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/* fixed mapping MMU emulation */
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int fixed_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot, |
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target_ulong address, int rw, int access_type) |
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{ |
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if (address <= (int32_t)0x7FFFFFFFUL) { |
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if (!(env->CP0_Status & (1 << CP0St_ERL))) |
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*physical = address + 0x40000000UL;
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else
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*physical = address; |
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} else if (address <= (int32_t)0xBFFFFFFFUL) |
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*physical = address & 0x1FFFFFFF;
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else
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*physical = address; |
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*prot = PAGE_READ | PAGE_WRITE; |
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return TLBRET_MATCH;
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} |
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/* MIPS32/MIPS64 R4000-style MMU emulation */
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int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot, |
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target_ulong address, int rw, int access_type) |
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{ |
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uint8_t ASID = env->CP0_EntryHi & 0xFF;
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int i;
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for (i = 0; i < env->tlb->tlb_in_use; i++) { |
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r4k_tlb_t *tlb = &env->tlb->mmu.r4k.tlb[i]; |
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/* 1k pages are not supported. */
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target_ulong mask = tlb->PageMask | ~(TARGET_PAGE_MASK << 1);
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target_ulong tag = address & ~mask; |
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target_ulong VPN = tlb->VPN & ~mask; |
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#if defined(TARGET_MIPS64)
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tag &= env->SEGMask; |
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#endif
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/* Check ASID, virtual page number & size */
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if ((tlb->G == 1 || tlb->ASID == ASID) && VPN == tag) { |
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/* TLB match */
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int n = !!(address & mask & ~(mask >> 1)); |
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/* Check access rights */
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if (!(n ? tlb->V1 : tlb->V0))
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return TLBRET_INVALID;
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if (rw == 0 || (n ? tlb->D1 : tlb->D0)) { |
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*physical = tlb->PFN[n] | (address & (mask >> 1));
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*prot = PAGE_READ; |
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if (n ? tlb->D1 : tlb->D0)
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*prot |= PAGE_WRITE; |
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return TLBRET_MATCH;
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} |
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return TLBRET_DIRTY;
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} |
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} |
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return TLBRET_NOMATCH;
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} |
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static int get_physical_address (CPUMIPSState *env, hwaddr *physical, |
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int *prot, target_ulong address,
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int rw, int access_type) |
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{ |
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/* User mode can only access useg/xuseg */
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int user_mode = (env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM;
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int supervisor_mode = (env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_SM;
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int kernel_mode = !user_mode && !supervisor_mode;
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#if defined(TARGET_MIPS64)
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int UX = (env->CP0_Status & (1 << CP0St_UX)) != 0; |
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int SX = (env->CP0_Status & (1 << CP0St_SX)) != 0; |
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int KX = (env->CP0_Status & (1 << CP0St_KX)) != 0; |
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#endif
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int ret = TLBRET_MATCH;
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#if 0
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qemu_log("user mode %d h %08x\n", user_mode, env->hflags);
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#endif
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if (address <= (int32_t)0x7FFFFFFFUL) { |
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/* useg */
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if (env->CP0_Status & (1 << CP0St_ERL)) { |
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*physical = address & 0xFFFFFFFF;
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*prot = PAGE_READ | PAGE_WRITE; |
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} else {
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ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); |
128 |
} |
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#if defined(TARGET_MIPS64)
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} else if (address < 0x4000000000000000ULL) { |
131 |
/* xuseg */
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if (UX && address <= (0x3FFFFFFFFFFFFFFFULL & env->SEGMask)) { |
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ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); |
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} else {
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ret = TLBRET_BADADDR; |
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} |
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} else if (address < 0x8000000000000000ULL) { |
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/* xsseg */
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if ((supervisor_mode || kernel_mode) &&
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SX && address <= (0x7FFFFFFFFFFFFFFFULL & env->SEGMask)) {
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ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); |
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} else {
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ret = TLBRET_BADADDR; |
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} |
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} else if (address < 0xC000000000000000ULL) { |
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/* xkphys */
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if (kernel_mode && KX &&
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(address & 0x07FFFFFFFFFFFFFFULL) <= env->PAMask) {
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*physical = address & env->PAMask; |
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*prot = PAGE_READ | PAGE_WRITE; |
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} else {
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ret = TLBRET_BADADDR; |
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} |
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} else if (address < 0xFFFFFFFF80000000ULL) { |
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/* xkseg */
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if (kernel_mode && KX &&
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address <= (0xFFFFFFFF7FFFFFFFULL & env->SEGMask)) {
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ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); |
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} else {
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ret = TLBRET_BADADDR; |
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} |
162 |
#endif
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} else if (address < (int32_t)0xA0000000UL) { |
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/* kseg0 */
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if (kernel_mode) {
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*physical = address - (int32_t)0x80000000UL;
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*prot = PAGE_READ | PAGE_WRITE; |
168 |
} else {
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ret = TLBRET_BADADDR; |
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} |
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} else if (address < (int32_t)0xC0000000UL) { |
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/* kseg1 */
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if (kernel_mode) {
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*physical = address - (int32_t)0xA0000000UL;
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*prot = PAGE_READ | PAGE_WRITE; |
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} else {
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ret = TLBRET_BADADDR; |
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} |
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} else if (address < (int32_t)0xE0000000UL) { |
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/* sseg (kseg2) */
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if (supervisor_mode || kernel_mode) {
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ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); |
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} else {
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ret = TLBRET_BADADDR; |
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} |
186 |
} else {
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/* kseg3 */
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/* XXX: debug segment is not emulated */
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if (kernel_mode) {
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ret = env->tlb->map_address(env, physical, prot, address, rw, access_type); |
191 |
} else {
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ret = TLBRET_BADADDR; |
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} |
194 |
} |
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#if 0
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qemu_log(TARGET_FMT_lx " %d %d => " TARGET_FMT_lx " %d (%d)\n",
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address, rw, access_type, *physical, *prot, ret);
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#endif
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return ret;
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} |
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#endif
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static void raise_mmu_exception(CPUMIPSState *env, target_ulong address, |
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int rw, int tlb_error) |
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{ |
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int exception = 0, error_code = 0; |
208 |
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switch (tlb_error) {
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default:
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case TLBRET_BADADDR:
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/* Reference to kernel address from user mode or supervisor mode */
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/* Reference to supervisor address from user mode */
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if (rw)
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exception = EXCP_AdES; |
216 |
else
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exception = EXCP_AdEL; |
218 |
break;
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case TLBRET_NOMATCH:
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/* No TLB match for a mapped address */
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if (rw)
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exception = EXCP_TLBS; |
223 |
else
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exception = EXCP_TLBL; |
225 |
error_code = 1;
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break;
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case TLBRET_INVALID:
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/* TLB match with no valid bit */
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if (rw)
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exception = EXCP_TLBS; |
231 |
else
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exception = EXCP_TLBL; |
233 |
break;
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case TLBRET_DIRTY:
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/* TLB match but 'D' bit is cleared */
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exception = EXCP_LTLBL; |
237 |
break;
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} |
240 |
/* Raise exception */
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env->CP0_BadVAddr = address; |
242 |
env->CP0_Context = (env->CP0_Context & ~0x007fffff) |
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((address >> 9) & 0x007ffff0); |
244 |
env->CP0_EntryHi = |
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(env->CP0_EntryHi & 0xFF) | (address & (TARGET_PAGE_MASK << 1)); |
246 |
#if defined(TARGET_MIPS64)
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env->CP0_EntryHi &= env->SEGMask; |
248 |
env->CP0_XContext = (env->CP0_XContext & ((~0ULL) << (env->SEGBITS - 7))) | |
249 |
((address & 0xC00000000000ULL) >> (55 - env->SEGBITS)) | |
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((address & ((1ULL << env->SEGBITS) - 1) & 0xFFFFFFFFFFFFE000ULL) >> 9); |
251 |
#endif
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env->exception_index = exception; |
253 |
env->error_code = error_code; |
254 |
} |
255 |
|
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#if !defined(CONFIG_USER_ONLY)
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hwaddr cpu_get_phys_page_debug(CPUMIPSState *env, target_ulong addr) |
258 |
{ |
259 |
hwaddr phys_addr; |
260 |
int prot;
|
261 |
|
262 |
if (get_physical_address(env, &phys_addr, &prot, addr, 0, ACCESS_INT) != 0) |
263 |
return -1; |
264 |
return phys_addr;
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} |
266 |
#endif
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267 |
|
268 |
int cpu_mips_handle_mmu_fault (CPUMIPSState *env, target_ulong address, int rw, |
269 |
int mmu_idx)
|
270 |
{ |
271 |
#if !defined(CONFIG_USER_ONLY)
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hwaddr physical; |
273 |
int prot;
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274 |
int access_type;
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#endif
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276 |
int ret = 0; |
277 |
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278 |
#if 0
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279 |
log_cpu_state(env, 0);
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280 |
#endif
|
281 |
qemu_log("%s pc " TARGET_FMT_lx " ad " TARGET_FMT_lx " rw %d mmu_idx %d\n", |
282 |
__func__, env->active_tc.PC, address, rw, mmu_idx); |
283 |
|
284 |
rw &= 1;
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285 |
|
286 |
/* data access */
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287 |
#if !defined(CONFIG_USER_ONLY)
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288 |
/* XXX: put correct access by using cpu_restore_state()
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289 |
correctly */
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290 |
access_type = ACCESS_INT; |
291 |
ret = get_physical_address(env, &physical, &prot, |
292 |
address, rw, access_type); |
293 |
qemu_log("%s address=" TARGET_FMT_lx " ret %d physical " TARGET_FMT_plx " prot %d\n", |
294 |
__func__, address, ret, physical, prot); |
295 |
if (ret == TLBRET_MATCH) {
|
296 |
tlb_set_page(env, address & TARGET_PAGE_MASK, |
297 |
physical & TARGET_PAGE_MASK, prot | PAGE_EXEC, |
298 |
mmu_idx, TARGET_PAGE_SIZE); |
299 |
ret = 0;
|
300 |
} else if (ret < 0) |
301 |
#endif
|
302 |
{ |
303 |
raise_mmu_exception(env, address, rw, ret); |
304 |
ret = 1;
|
305 |
} |
306 |
|
307 |
return ret;
|
308 |
} |
309 |
|
310 |
#if !defined(CONFIG_USER_ONLY)
|
311 |
hwaddr cpu_mips_translate_address(CPUMIPSState *env, target_ulong address, int rw)
|
312 |
{ |
313 |
hwaddr physical; |
314 |
int prot;
|
315 |
int access_type;
|
316 |
int ret = 0; |
317 |
|
318 |
rw &= 1;
|
319 |
|
320 |
/* data access */
|
321 |
access_type = ACCESS_INT; |
322 |
ret = get_physical_address(env, &physical, &prot, |
323 |
address, rw, access_type); |
324 |
if (ret != TLBRET_MATCH) {
|
325 |
raise_mmu_exception(env, address, rw, ret); |
326 |
return -1LL; |
327 |
} else {
|
328 |
return physical;
|
329 |
} |
330 |
} |
331 |
#endif
|
332 |
|
333 |
static const char * const excp_names[EXCP_LAST + 1] = { |
334 |
[EXCP_RESET] = "reset",
|
335 |
[EXCP_SRESET] = "soft reset",
|
336 |
[EXCP_DSS] = "debug single step",
|
337 |
[EXCP_DINT] = "debug interrupt",
|
338 |
[EXCP_NMI] = "non-maskable interrupt",
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339 |
[EXCP_MCHECK] = "machine check",
|
340 |
[EXCP_EXT_INTERRUPT] = "interrupt",
|
341 |
[EXCP_DFWATCH] = "deferred watchpoint",
|
342 |
[EXCP_DIB] = "debug instruction breakpoint",
|
343 |
[EXCP_IWATCH] = "instruction fetch watchpoint",
|
344 |
[EXCP_AdEL] = "address error load",
|
345 |
[EXCP_AdES] = "address error store",
|
346 |
[EXCP_TLBF] = "TLB refill",
|
347 |
[EXCP_IBE] = "instruction bus error",
|
348 |
[EXCP_DBp] = "debug breakpoint",
|
349 |
[EXCP_SYSCALL] = "syscall",
|
350 |
[EXCP_BREAK] = "break",
|
351 |
[EXCP_CpU] = "coprocessor unusable",
|
352 |
[EXCP_RI] = "reserved instruction",
|
353 |
[EXCP_OVERFLOW] = "arithmetic overflow",
|
354 |
[EXCP_TRAP] = "trap",
|
355 |
[EXCP_FPE] = "floating point",
|
356 |
[EXCP_DDBS] = "debug data break store",
|
357 |
[EXCP_DWATCH] = "data watchpoint",
|
358 |
[EXCP_LTLBL] = "TLB modify",
|
359 |
[EXCP_TLBL] = "TLB load",
|
360 |
[EXCP_TLBS] = "TLB store",
|
361 |
[EXCP_DBE] = "data bus error",
|
362 |
[EXCP_DDBL] = "debug data break load",
|
363 |
[EXCP_THREAD] = "thread",
|
364 |
[EXCP_MDMX] = "MDMX",
|
365 |
[EXCP_C2E] = "precise coprocessor 2",
|
366 |
[EXCP_CACHE] = "cache error",
|
367 |
}; |
368 |
|
369 |
#if !defined(CONFIG_USER_ONLY)
|
370 |
static target_ulong exception_resume_pc (CPUMIPSState *env)
|
371 |
{ |
372 |
target_ulong bad_pc; |
373 |
target_ulong isa_mode; |
374 |
|
375 |
isa_mode = !!(env->hflags & MIPS_HFLAG_M16); |
376 |
bad_pc = env->active_tc.PC | isa_mode; |
377 |
if (env->hflags & MIPS_HFLAG_BMASK) {
|
378 |
/* If the exception was raised from a delay slot, come back to
|
379 |
the jump. */
|
380 |
bad_pc -= (env->hflags & MIPS_HFLAG_B16 ? 2 : 4); |
381 |
} |
382 |
|
383 |
return bad_pc;
|
384 |
} |
385 |
|
386 |
static void set_hflags_for_handler (CPUMIPSState *env) |
387 |
{ |
388 |
/* Exception handlers are entered in 32-bit mode. */
|
389 |
env->hflags &= ~(MIPS_HFLAG_M16); |
390 |
/* ...except that microMIPS lets you choose. */
|
391 |
if (env->insn_flags & ASE_MICROMIPS) {
|
392 |
env->hflags |= (!!(env->CP0_Config3 |
393 |
& (1 << CP0C3_ISA_ON_EXC))
|
394 |
<< MIPS_HFLAG_M16_SHIFT); |
395 |
} |
396 |
} |
397 |
#endif
|
398 |
|
399 |
void do_interrupt (CPUMIPSState *env)
|
400 |
{ |
401 |
#if !defined(CONFIG_USER_ONLY)
|
402 |
MIPSCPU *cpu = mips_env_get_cpu(env); |
403 |
target_ulong offset; |
404 |
int cause = -1; |
405 |
const char *name; |
406 |
|
407 |
if (qemu_log_enabled() && env->exception_index != EXCP_EXT_INTERRUPT) {
|
408 |
if (env->exception_index < 0 || env->exception_index > EXCP_LAST) |
409 |
name = "unknown";
|
410 |
else
|
411 |
name = excp_names[env->exception_index]; |
412 |
|
413 |
qemu_log("%s enter: PC " TARGET_FMT_lx " EPC " TARGET_FMT_lx " %s exception\n", |
414 |
__func__, env->active_tc.PC, env->CP0_EPC, name); |
415 |
} |
416 |
if (env->exception_index == EXCP_EXT_INTERRUPT &&
|
417 |
(env->hflags & MIPS_HFLAG_DM)) |
418 |
env->exception_index = EXCP_DINT; |
419 |
offset = 0x180;
|
420 |
switch (env->exception_index) {
|
421 |
case EXCP_DSS:
|
422 |
env->CP0_Debug |= 1 << CP0DB_DSS;
|
423 |
/* Debug single step cannot be raised inside a delay slot and
|
424 |
resume will always occur on the next instruction
|
425 |
(but we assume the pc has always been updated during
|
426 |
code translation). */
|
427 |
env->CP0_DEPC = env->active_tc.PC | !!(env->hflags & MIPS_HFLAG_M16); |
428 |
goto enter_debug_mode;
|
429 |
case EXCP_DINT:
|
430 |
env->CP0_Debug |= 1 << CP0DB_DINT;
|
431 |
goto set_DEPC;
|
432 |
case EXCP_DIB:
|
433 |
env->CP0_Debug |= 1 << CP0DB_DIB;
|
434 |
goto set_DEPC;
|
435 |
case EXCP_DBp:
|
436 |
env->CP0_Debug |= 1 << CP0DB_DBp;
|
437 |
goto set_DEPC;
|
438 |
case EXCP_DDBS:
|
439 |
env->CP0_Debug |= 1 << CP0DB_DDBS;
|
440 |
goto set_DEPC;
|
441 |
case EXCP_DDBL:
|
442 |
env->CP0_Debug |= 1 << CP0DB_DDBL;
|
443 |
set_DEPC:
|
444 |
env->CP0_DEPC = exception_resume_pc(env); |
445 |
env->hflags &= ~MIPS_HFLAG_BMASK; |
446 |
enter_debug_mode:
|
447 |
env->hflags |= MIPS_HFLAG_DM | MIPS_HFLAG_64 | MIPS_HFLAG_CP0; |
448 |
env->hflags &= ~(MIPS_HFLAG_KSU); |
449 |
/* EJTAG probe trap enable is not implemented... */
|
450 |
if (!(env->CP0_Status & (1 << CP0St_EXL))) |
451 |
env->CP0_Cause &= ~(1 << CP0Ca_BD);
|
452 |
env->active_tc.PC = (int32_t)0xBFC00480;
|
453 |
set_hflags_for_handler(env); |
454 |
break;
|
455 |
case EXCP_RESET:
|
456 |
cpu_reset(CPU(cpu)); |
457 |
break;
|
458 |
case EXCP_SRESET:
|
459 |
env->CP0_Status |= (1 << CP0St_SR);
|
460 |
memset(env->CP0_WatchLo, 0, sizeof(*env->CP0_WatchLo)); |
461 |
goto set_error_EPC;
|
462 |
case EXCP_NMI:
|
463 |
env->CP0_Status |= (1 << CP0St_NMI);
|
464 |
set_error_EPC:
|
465 |
env->CP0_ErrorEPC = exception_resume_pc(env); |
466 |
env->hflags &= ~MIPS_HFLAG_BMASK; |
467 |
env->CP0_Status |= (1 << CP0St_ERL) | (1 << CP0St_BEV); |
468 |
env->hflags |= MIPS_HFLAG_64 | MIPS_HFLAG_CP0; |
469 |
env->hflags &= ~(MIPS_HFLAG_KSU); |
470 |
if (!(env->CP0_Status & (1 << CP0St_EXL))) |
471 |
env->CP0_Cause &= ~(1 << CP0Ca_BD);
|
472 |
env->active_tc.PC = (int32_t)0xBFC00000;
|
473 |
set_hflags_for_handler(env); |
474 |
break;
|
475 |
case EXCP_EXT_INTERRUPT:
|
476 |
cause = 0;
|
477 |
if (env->CP0_Cause & (1 << CP0Ca_IV)) |
478 |
offset = 0x200;
|
479 |
|
480 |
if (env->CP0_Config3 & ((1 << CP0C3_VInt) | (1 << CP0C3_VEIC))) { |
481 |
/* Vectored Interrupts. */
|
482 |
unsigned int spacing; |
483 |
unsigned int vector; |
484 |
unsigned int pending = (env->CP0_Cause & CP0Ca_IP_mask) >> 8; |
485 |
|
486 |
pending &= env->CP0_Status >> 8;
|
487 |
/* Compute the Vector Spacing. */
|
488 |
spacing = (env->CP0_IntCtl >> CP0IntCtl_VS) & ((1 << 6) - 1); |
489 |
spacing <<= 5;
|
490 |
|
491 |
if (env->CP0_Config3 & (1 << CP0C3_VInt)) { |
492 |
/* For VInt mode, the MIPS computes the vector internally. */
|
493 |
for (vector = 7; vector > 0; vector--) { |
494 |
if (pending & (1 << vector)) { |
495 |
/* Found it. */
|
496 |
break;
|
497 |
} |
498 |
} |
499 |
} else {
|
500 |
/* For VEIC mode, the external interrupt controller feeds the
|
501 |
vector through the CP0Cause IP lines. */
|
502 |
vector = pending; |
503 |
} |
504 |
offset = 0x200 + vector * spacing;
|
505 |
} |
506 |
goto set_EPC;
|
507 |
case EXCP_LTLBL:
|
508 |
cause = 1;
|
509 |
goto set_EPC;
|
510 |
case EXCP_TLBL:
|
511 |
cause = 2;
|
512 |
if (env->error_code == 1 && !(env->CP0_Status & (1 << CP0St_EXL))) { |
513 |
#if defined(TARGET_MIPS64)
|
514 |
int R = env->CP0_BadVAddr >> 62; |
515 |
int UX = (env->CP0_Status & (1 << CP0St_UX)) != 0; |
516 |
int SX = (env->CP0_Status & (1 << CP0St_SX)) != 0; |
517 |
int KX = (env->CP0_Status & (1 << CP0St_KX)) != 0; |
518 |
|
519 |
if (((R == 0 && UX) || (R == 1 && SX) || (R == 3 && KX)) && |
520 |
(!(env->insn_flags & (INSN_LOONGSON2E | INSN_LOONGSON2F)))) |
521 |
offset = 0x080;
|
522 |
else
|
523 |
#endif
|
524 |
offset = 0x000;
|
525 |
} |
526 |
goto set_EPC;
|
527 |
case EXCP_TLBS:
|
528 |
cause = 3;
|
529 |
if (env->error_code == 1 && !(env->CP0_Status & (1 << CP0St_EXL))) { |
530 |
#if defined(TARGET_MIPS64)
|
531 |
int R = env->CP0_BadVAddr >> 62; |
532 |
int UX = (env->CP0_Status & (1 << CP0St_UX)) != 0; |
533 |
int SX = (env->CP0_Status & (1 << CP0St_SX)) != 0; |
534 |
int KX = (env->CP0_Status & (1 << CP0St_KX)) != 0; |
535 |
|
536 |
if (((R == 0 && UX) || (R == 1 && SX) || (R == 3 && KX)) && |
537 |
(!(env->insn_flags & (INSN_LOONGSON2E | INSN_LOONGSON2F)))) |
538 |
offset = 0x080;
|
539 |
else
|
540 |
#endif
|
541 |
offset = 0x000;
|
542 |
} |
543 |
goto set_EPC;
|
544 |
case EXCP_AdEL:
|
545 |
cause = 4;
|
546 |
goto set_EPC;
|
547 |
case EXCP_AdES:
|
548 |
cause = 5;
|
549 |
goto set_EPC;
|
550 |
case EXCP_IBE:
|
551 |
cause = 6;
|
552 |
goto set_EPC;
|
553 |
case EXCP_DBE:
|
554 |
cause = 7;
|
555 |
goto set_EPC;
|
556 |
case EXCP_SYSCALL:
|
557 |
cause = 8;
|
558 |
goto set_EPC;
|
559 |
case EXCP_BREAK:
|
560 |
cause = 9;
|
561 |
goto set_EPC;
|
562 |
case EXCP_RI:
|
563 |
cause = 10;
|
564 |
goto set_EPC;
|
565 |
case EXCP_CpU:
|
566 |
cause = 11;
|
567 |
env->CP0_Cause = (env->CP0_Cause & ~(0x3 << CP0Ca_CE)) |
|
568 |
(env->error_code << CP0Ca_CE); |
569 |
goto set_EPC;
|
570 |
case EXCP_OVERFLOW:
|
571 |
cause = 12;
|
572 |
goto set_EPC;
|
573 |
case EXCP_TRAP:
|
574 |
cause = 13;
|
575 |
goto set_EPC;
|
576 |
case EXCP_FPE:
|
577 |
cause = 15;
|
578 |
goto set_EPC;
|
579 |
case EXCP_C2E:
|
580 |
cause = 18;
|
581 |
goto set_EPC;
|
582 |
case EXCP_MDMX:
|
583 |
cause = 22;
|
584 |
goto set_EPC;
|
585 |
case EXCP_DWATCH:
|
586 |
cause = 23;
|
587 |
/* XXX: TODO: manage defered watch exceptions */
|
588 |
goto set_EPC;
|
589 |
case EXCP_MCHECK:
|
590 |
cause = 24;
|
591 |
goto set_EPC;
|
592 |
case EXCP_THREAD:
|
593 |
cause = 25;
|
594 |
goto set_EPC;
|
595 |
case EXCP_CACHE:
|
596 |
cause = 30;
|
597 |
if (env->CP0_Status & (1 << CP0St_BEV)) { |
598 |
offset = 0x100;
|
599 |
} else {
|
600 |
offset = 0x20000100;
|
601 |
} |
602 |
set_EPC:
|
603 |
if (!(env->CP0_Status & (1 << CP0St_EXL))) { |
604 |
env->CP0_EPC = exception_resume_pc(env); |
605 |
if (env->hflags & MIPS_HFLAG_BMASK) {
|
606 |
env->CP0_Cause |= (1 << CP0Ca_BD);
|
607 |
} else {
|
608 |
env->CP0_Cause &= ~(1 << CP0Ca_BD);
|
609 |
} |
610 |
env->CP0_Status |= (1 << CP0St_EXL);
|
611 |
env->hflags |= MIPS_HFLAG_64 | MIPS_HFLAG_CP0; |
612 |
env->hflags &= ~(MIPS_HFLAG_KSU); |
613 |
} |
614 |
env->hflags &= ~MIPS_HFLAG_BMASK; |
615 |
if (env->CP0_Status & (1 << CP0St_BEV)) { |
616 |
env->active_tc.PC = (int32_t)0xBFC00200;
|
617 |
} else {
|
618 |
env->active_tc.PC = (int32_t)(env->CP0_EBase & ~0x3ff);
|
619 |
} |
620 |
env->active_tc.PC += offset; |
621 |
set_hflags_for_handler(env); |
622 |
env->CP0_Cause = (env->CP0_Cause & ~(0x1f << CP0Ca_EC)) | (cause << CP0Ca_EC);
|
623 |
break;
|
624 |
default:
|
625 |
qemu_log("Invalid MIPS exception %d. Exiting\n", env->exception_index);
|
626 |
printf("Invalid MIPS exception %d. Exiting\n", env->exception_index);
|
627 |
exit(1);
|
628 |
} |
629 |
if (qemu_log_enabled() && env->exception_index != EXCP_EXT_INTERRUPT) {
|
630 |
qemu_log("%s: PC " TARGET_FMT_lx " EPC " TARGET_FMT_lx " cause %d\n" |
631 |
" S %08x C %08x A " TARGET_FMT_lx " D " TARGET_FMT_lx "\n", |
632 |
__func__, env->active_tc.PC, env->CP0_EPC, cause, |
633 |
env->CP0_Status, env->CP0_Cause, env->CP0_BadVAddr, |
634 |
env->CP0_DEPC); |
635 |
} |
636 |
#endif
|
637 |
env->exception_index = EXCP_NONE; |
638 |
} |
639 |
|
640 |
#if !defined(CONFIG_USER_ONLY)
|
641 |
void r4k_invalidate_tlb (CPUMIPSState *env, int idx, int use_extra) |
642 |
{ |
643 |
r4k_tlb_t *tlb; |
644 |
target_ulong addr; |
645 |
target_ulong end; |
646 |
uint8_t ASID = env->CP0_EntryHi & 0xFF;
|
647 |
target_ulong mask; |
648 |
|
649 |
tlb = &env->tlb->mmu.r4k.tlb[idx]; |
650 |
/* The qemu TLB is flushed when the ASID changes, so no need to
|
651 |
flush these entries again. */
|
652 |
if (tlb->G == 0 && tlb->ASID != ASID) { |
653 |
return;
|
654 |
} |
655 |
|
656 |
if (use_extra && env->tlb->tlb_in_use < MIPS_TLB_MAX) {
|
657 |
/* For tlbwr, we can shadow the discarded entry into
|
658 |
a new (fake) TLB entry, as long as the guest can not
|
659 |
tell that it's there. */
|
660 |
env->tlb->mmu.r4k.tlb[env->tlb->tlb_in_use] = *tlb; |
661 |
env->tlb->tlb_in_use++; |
662 |
return;
|
663 |
} |
664 |
|
665 |
/* 1k pages are not supported. */
|
666 |
mask = tlb->PageMask | ~(TARGET_PAGE_MASK << 1);
|
667 |
if (tlb->V0) {
|
668 |
addr = tlb->VPN & ~mask; |
669 |
#if defined(TARGET_MIPS64)
|
670 |
if (addr >= (0xFFFFFFFF80000000ULL & env->SEGMask)) { |
671 |
addr |= 0x3FFFFF0000000000ULL;
|
672 |
} |
673 |
#endif
|
674 |
end = addr | (mask >> 1);
|
675 |
while (addr < end) {
|
676 |
tlb_flush_page (env, addr); |
677 |
addr += TARGET_PAGE_SIZE; |
678 |
} |
679 |
} |
680 |
if (tlb->V1) {
|
681 |
addr = (tlb->VPN & ~mask) | ((mask >> 1) + 1); |
682 |
#if defined(TARGET_MIPS64)
|
683 |
if (addr >= (0xFFFFFFFF80000000ULL & env->SEGMask)) { |
684 |
addr |= 0x3FFFFF0000000000ULL;
|
685 |
} |
686 |
#endif
|
687 |
end = addr | mask; |
688 |
while (addr - 1 < end) { |
689 |
tlb_flush_page (env, addr); |
690 |
addr += TARGET_PAGE_SIZE; |
691 |
} |
692 |
} |
693 |
} |
694 |
#endif
|