d10eb08f5d
We have never has the concept of global TLB entries which would avoid the flush so we never actually use this flag. Drop it and make clear that tlb_flush is the sledge-hammer it has always been. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net> [DG: ppc portions] Acked-by: David Gibson <david@gibson.dropbear.id.au>
732 lines
23 KiB
C
732 lines
23 KiB
C
/*
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* Common CPU TLB handling
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*
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* Copyright (c) 2003 Fabrice Bellard
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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 "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/exec-all.h"
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#include "exec/memory.h"
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#include "exec/address-spaces.h"
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#include "exec/cpu_ldst.h"
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#include "exec/cputlb.h"
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#include "exec/memory-internal.h"
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#include "exec/ram_addr.h"
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#include "tcg/tcg.h"
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#include "qemu/error-report.h"
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#include "exec/log.h"
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#include "exec/helper-proto.h"
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#include "qemu/atomic.h"
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/* DEBUG defines, enable DEBUG_TLB_LOG to log to the CPU_LOG_MMU target */
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/* #define DEBUG_TLB */
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/* #define DEBUG_TLB_LOG */
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#ifdef DEBUG_TLB
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# define DEBUG_TLB_GATE 1
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# ifdef DEBUG_TLB_LOG
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# define DEBUG_TLB_LOG_GATE 1
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# else
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# define DEBUG_TLB_LOG_GATE 0
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# endif
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#else
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# define DEBUG_TLB_GATE 0
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# define DEBUG_TLB_LOG_GATE 0
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#endif
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#define tlb_debug(fmt, ...) do { \
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if (DEBUG_TLB_LOG_GATE) { \
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qemu_log_mask(CPU_LOG_MMU, "%s: " fmt, __func__, \
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## __VA_ARGS__); \
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} else if (DEBUG_TLB_GATE) { \
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fprintf(stderr, "%s: " fmt, __func__, ## __VA_ARGS__); \
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} \
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} while (0)
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/* statistics */
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int tlb_flush_count;
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/* This is OK because CPU architectures generally permit an
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* implementation to drop entries from the TLB at any time, so
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* flushing more entries than required is only an efficiency issue,
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* not a correctness issue.
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*/
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void tlb_flush(CPUState *cpu)
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{
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CPUArchState *env = cpu->env_ptr;
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memset(env->tlb_table, -1, sizeof(env->tlb_table));
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memset(env->tlb_v_table, -1, sizeof(env->tlb_v_table));
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memset(cpu->tb_jmp_cache, 0, sizeof(cpu->tb_jmp_cache));
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env->vtlb_index = 0;
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env->tlb_flush_addr = -1;
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env->tlb_flush_mask = 0;
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tlb_flush_count++;
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}
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static inline void v_tlb_flush_by_mmuidx(CPUState *cpu, va_list argp)
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{
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CPUArchState *env = cpu->env_ptr;
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tlb_debug("start\n");
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for (;;) {
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int mmu_idx = va_arg(argp, int);
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if (mmu_idx < 0) {
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break;
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}
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tlb_debug("%d\n", mmu_idx);
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memset(env->tlb_table[mmu_idx], -1, sizeof(env->tlb_table[0]));
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memset(env->tlb_v_table[mmu_idx], -1, sizeof(env->tlb_v_table[0]));
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}
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memset(cpu->tb_jmp_cache, 0, sizeof(cpu->tb_jmp_cache));
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}
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void tlb_flush_by_mmuidx(CPUState *cpu, ...)
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{
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va_list argp;
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va_start(argp, cpu);
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v_tlb_flush_by_mmuidx(cpu, argp);
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va_end(argp);
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}
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static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr)
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{
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if (addr == (tlb_entry->addr_read &
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(TARGET_PAGE_MASK | TLB_INVALID_MASK)) ||
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addr == (tlb_entry->addr_write &
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(TARGET_PAGE_MASK | TLB_INVALID_MASK)) ||
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addr == (tlb_entry->addr_code &
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(TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
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memset(tlb_entry, -1, sizeof(*tlb_entry));
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}
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}
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void tlb_flush_page(CPUState *cpu, target_ulong addr)
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{
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CPUArchState *env = cpu->env_ptr;
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int i;
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int mmu_idx;
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tlb_debug("page :" TARGET_FMT_lx "\n", addr);
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/* Check if we need to flush due to large pages. */
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if ((addr & env->tlb_flush_mask) == env->tlb_flush_addr) {
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tlb_debug("forcing full flush ("
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TARGET_FMT_lx "/" TARGET_FMT_lx ")\n",
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env->tlb_flush_addr, env->tlb_flush_mask);
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tlb_flush(cpu);
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return;
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}
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addr &= TARGET_PAGE_MASK;
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i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
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tlb_flush_entry(&env->tlb_table[mmu_idx][i], addr);
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}
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/* check whether there are entries that need to be flushed in the vtlb */
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for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
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int k;
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for (k = 0; k < CPU_VTLB_SIZE; k++) {
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tlb_flush_entry(&env->tlb_v_table[mmu_idx][k], addr);
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}
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}
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tb_flush_jmp_cache(cpu, addr);
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}
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void tlb_flush_page_by_mmuidx(CPUState *cpu, target_ulong addr, ...)
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{
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CPUArchState *env = cpu->env_ptr;
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int i, k;
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va_list argp;
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va_start(argp, addr);
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tlb_debug("addr "TARGET_FMT_lx"\n", addr);
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/* Check if we need to flush due to large pages. */
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if ((addr & env->tlb_flush_mask) == env->tlb_flush_addr) {
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tlb_debug("forced full flush ("
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TARGET_FMT_lx "/" TARGET_FMT_lx ")\n",
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env->tlb_flush_addr, env->tlb_flush_mask);
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v_tlb_flush_by_mmuidx(cpu, argp);
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va_end(argp);
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return;
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}
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addr &= TARGET_PAGE_MASK;
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i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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for (;;) {
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int mmu_idx = va_arg(argp, int);
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if (mmu_idx < 0) {
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break;
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}
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tlb_debug("idx %d\n", mmu_idx);
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tlb_flush_entry(&env->tlb_table[mmu_idx][i], addr);
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/* check whether there are vltb entries that need to be flushed */
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for (k = 0; k < CPU_VTLB_SIZE; k++) {
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tlb_flush_entry(&env->tlb_v_table[mmu_idx][k], addr);
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}
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}
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va_end(argp);
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tb_flush_jmp_cache(cpu, addr);
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}
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/* update the TLBs so that writes to code in the virtual page 'addr'
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can be detected */
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void tlb_protect_code(ram_addr_t ram_addr)
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{
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cpu_physical_memory_test_and_clear_dirty(ram_addr, TARGET_PAGE_SIZE,
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DIRTY_MEMORY_CODE);
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}
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/* update the TLB so that writes in physical page 'phys_addr' are no longer
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tested for self modifying code */
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void tlb_unprotect_code(ram_addr_t ram_addr)
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{
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cpu_physical_memory_set_dirty_flag(ram_addr, DIRTY_MEMORY_CODE);
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}
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static bool tlb_is_dirty_ram(CPUTLBEntry *tlbe)
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{
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return (tlbe->addr_write & (TLB_INVALID_MASK|TLB_MMIO|TLB_NOTDIRTY)) == 0;
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}
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void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry, uintptr_t start,
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uintptr_t length)
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{
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uintptr_t addr;
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if (tlb_is_dirty_ram(tlb_entry)) {
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addr = (tlb_entry->addr_write & TARGET_PAGE_MASK) + tlb_entry->addend;
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if ((addr - start) < length) {
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tlb_entry->addr_write |= TLB_NOTDIRTY;
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}
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}
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}
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static inline ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr)
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{
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ram_addr_t ram_addr;
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ram_addr = qemu_ram_addr_from_host(ptr);
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if (ram_addr == RAM_ADDR_INVALID) {
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fprintf(stderr, "Bad ram pointer %p\n", ptr);
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abort();
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}
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return ram_addr;
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}
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void tlb_reset_dirty(CPUState *cpu, ram_addr_t start1, ram_addr_t length)
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{
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CPUArchState *env;
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int mmu_idx;
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env = cpu->env_ptr;
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for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
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unsigned int i;
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for (i = 0; i < CPU_TLB_SIZE; i++) {
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tlb_reset_dirty_range(&env->tlb_table[mmu_idx][i],
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start1, length);
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}
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for (i = 0; i < CPU_VTLB_SIZE; i++) {
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tlb_reset_dirty_range(&env->tlb_v_table[mmu_idx][i],
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start1, length);
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}
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}
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}
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static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, target_ulong vaddr)
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{
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if (tlb_entry->addr_write == (vaddr | TLB_NOTDIRTY)) {
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tlb_entry->addr_write = vaddr;
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}
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}
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/* update the TLB corresponding to virtual page vaddr
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so that it is no longer dirty */
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void tlb_set_dirty(CPUState *cpu, target_ulong vaddr)
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{
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CPUArchState *env = cpu->env_ptr;
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int i;
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int mmu_idx;
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vaddr &= TARGET_PAGE_MASK;
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i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
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tlb_set_dirty1(&env->tlb_table[mmu_idx][i], vaddr);
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}
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for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
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int k;
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for (k = 0; k < CPU_VTLB_SIZE; k++) {
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tlb_set_dirty1(&env->tlb_v_table[mmu_idx][k], vaddr);
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}
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}
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}
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/* Our TLB does not support large pages, so remember the area covered by
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large pages and trigger a full TLB flush if these are invalidated. */
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static void tlb_add_large_page(CPUArchState *env, target_ulong vaddr,
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target_ulong size)
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{
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target_ulong mask = ~(size - 1);
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if (env->tlb_flush_addr == (target_ulong)-1) {
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env->tlb_flush_addr = vaddr & mask;
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env->tlb_flush_mask = mask;
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return;
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}
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/* Extend the existing region to include the new page.
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This is a compromise between unnecessary flushes and the cost
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of maintaining a full variable size TLB. */
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mask &= env->tlb_flush_mask;
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while (((env->tlb_flush_addr ^ vaddr) & mask) != 0) {
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mask <<= 1;
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}
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env->tlb_flush_addr &= mask;
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env->tlb_flush_mask = mask;
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}
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/* Add a new TLB entry. At most one entry for a given virtual address
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* is permitted. Only a single TARGET_PAGE_SIZE region is mapped, the
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* supplied size is only used by tlb_flush_page.
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*
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* Called from TCG-generated code, which is under an RCU read-side
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* critical section.
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*/
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void tlb_set_page_with_attrs(CPUState *cpu, target_ulong vaddr,
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hwaddr paddr, MemTxAttrs attrs, int prot,
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int mmu_idx, target_ulong size)
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{
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CPUArchState *env = cpu->env_ptr;
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MemoryRegionSection *section;
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unsigned int index;
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target_ulong address;
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target_ulong code_address;
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uintptr_t addend;
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CPUTLBEntry *te;
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hwaddr iotlb, xlat, sz;
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unsigned vidx = env->vtlb_index++ % CPU_VTLB_SIZE;
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int asidx = cpu_asidx_from_attrs(cpu, attrs);
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assert(size >= TARGET_PAGE_SIZE);
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if (size != TARGET_PAGE_SIZE) {
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tlb_add_large_page(env, vaddr, size);
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}
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sz = size;
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section = address_space_translate_for_iotlb(cpu, asidx, paddr, &xlat, &sz);
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assert(sz >= TARGET_PAGE_SIZE);
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tlb_debug("vaddr=" TARGET_FMT_lx " paddr=0x" TARGET_FMT_plx
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" prot=%x idx=%d\n",
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vaddr, paddr, prot, mmu_idx);
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address = vaddr;
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if (!memory_region_is_ram(section->mr) && !memory_region_is_romd(section->mr)) {
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/* IO memory case */
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address |= TLB_MMIO;
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addend = 0;
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} else {
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/* TLB_MMIO for rom/romd handled below */
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addend = (uintptr_t)memory_region_get_ram_ptr(section->mr) + xlat;
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}
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code_address = address;
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iotlb = memory_region_section_get_iotlb(cpu, section, vaddr, paddr, xlat,
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prot, &address);
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index = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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te = &env->tlb_table[mmu_idx][index];
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/* do not discard the translation in te, evict it into a victim tlb */
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env->tlb_v_table[mmu_idx][vidx] = *te;
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env->iotlb_v[mmu_idx][vidx] = env->iotlb[mmu_idx][index];
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/* refill the tlb */
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env->iotlb[mmu_idx][index].addr = iotlb - vaddr;
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env->iotlb[mmu_idx][index].attrs = attrs;
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te->addend = addend - vaddr;
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if (prot & PAGE_READ) {
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te->addr_read = address;
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} else {
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te->addr_read = -1;
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}
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if (prot & PAGE_EXEC) {
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te->addr_code = code_address;
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} else {
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te->addr_code = -1;
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}
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if (prot & PAGE_WRITE) {
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if ((memory_region_is_ram(section->mr) && section->readonly)
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|| memory_region_is_romd(section->mr)) {
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/* Write access calls the I/O callback. */
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te->addr_write = address | TLB_MMIO;
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} else if (memory_region_is_ram(section->mr)
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&& cpu_physical_memory_is_clean(
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memory_region_get_ram_addr(section->mr) + xlat)) {
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te->addr_write = address | TLB_NOTDIRTY;
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} else {
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te->addr_write = address;
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}
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} else {
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te->addr_write = -1;
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}
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}
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/* Add a new TLB entry, but without specifying the memory
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* transaction attributes to be used.
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*/
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void tlb_set_page(CPUState *cpu, target_ulong vaddr,
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hwaddr paddr, int prot,
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int mmu_idx, target_ulong size)
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{
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tlb_set_page_with_attrs(cpu, vaddr, paddr, MEMTXATTRS_UNSPECIFIED,
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prot, mmu_idx, size);
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}
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static void report_bad_exec(CPUState *cpu, target_ulong addr)
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{
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/* Accidentally executing outside RAM or ROM is quite common for
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* several user-error situations, so report it in a way that
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* makes it clear that this isn't a QEMU bug and provide suggestions
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* about what a user could do to fix things.
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*/
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error_report("Trying to execute code outside RAM or ROM at 0x"
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TARGET_FMT_lx, addr);
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error_printf("This usually means one of the following happened:\n\n"
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"(1) You told QEMU to execute a kernel for the wrong machine "
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"type, and it crashed on startup (eg trying to run a "
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"raspberry pi kernel on a versatilepb QEMU machine)\n"
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"(2) You didn't give QEMU a kernel or BIOS filename at all, "
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"and QEMU executed a ROM full of no-op instructions until "
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"it fell off the end\n"
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"(3) Your guest kernel has a bug and crashed by jumping "
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"off into nowhere\n\n"
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"This is almost always one of the first two, so check your "
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"command line and that you are using the right type of kernel "
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"for this machine.\n"
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"If you think option (3) is likely then you can try debugging "
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"your guest with the -d debug options; in particular "
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"-d guest_errors will cause the log to include a dump of the "
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"guest register state at this point.\n\n"
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"Execution cannot continue; stopping here.\n\n");
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/* Report also to the logs, with more detail including register dump */
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qemu_log_mask(LOG_GUEST_ERROR, "qemu: fatal: Trying to execute code "
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"outside RAM or ROM at 0x" TARGET_FMT_lx "\n", addr);
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log_cpu_state_mask(LOG_GUEST_ERROR, cpu, CPU_DUMP_FPU | CPU_DUMP_CCOP);
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}
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/* NOTE: this function can trigger an exception */
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/* NOTE2: the returned address is not exactly the physical address: it
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* is actually a ram_addr_t (in system mode; the user mode emulation
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* version of this function returns a guest virtual address).
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*/
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tb_page_addr_t get_page_addr_code(CPUArchState *env1, target_ulong addr)
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{
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int mmu_idx, page_index, pd;
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void *p;
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MemoryRegion *mr;
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CPUState *cpu = ENV_GET_CPU(env1);
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CPUIOTLBEntry *iotlbentry;
|
|
|
|
page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
mmu_idx = cpu_mmu_index(env1, true);
|
|
if (unlikely(env1->tlb_table[mmu_idx][page_index].addr_code !=
|
|
(addr & TARGET_PAGE_MASK))) {
|
|
cpu_ldub_code(env1, addr);
|
|
}
|
|
iotlbentry = &env1->iotlb[mmu_idx][page_index];
|
|
pd = iotlbentry->addr & ~TARGET_PAGE_MASK;
|
|
mr = iotlb_to_region(cpu, pd, iotlbentry->attrs);
|
|
if (memory_region_is_unassigned(mr)) {
|
|
CPUClass *cc = CPU_GET_CLASS(cpu);
|
|
|
|
if (cc->do_unassigned_access) {
|
|
cc->do_unassigned_access(cpu, addr, false, true, 0, 4);
|
|
} else {
|
|
report_bad_exec(cpu, addr);
|
|
exit(1);
|
|
}
|
|
}
|
|
p = (void *)((uintptr_t)addr + env1->tlb_table[mmu_idx][page_index].addend);
|
|
return qemu_ram_addr_from_host_nofail(p);
|
|
}
|
|
|
|
static uint64_t io_readx(CPUArchState *env, CPUIOTLBEntry *iotlbentry,
|
|
target_ulong addr, uintptr_t retaddr, int size)
|
|
{
|
|
CPUState *cpu = ENV_GET_CPU(env);
|
|
hwaddr physaddr = iotlbentry->addr;
|
|
MemoryRegion *mr = iotlb_to_region(cpu, physaddr, iotlbentry->attrs);
|
|
uint64_t val;
|
|
|
|
physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
|
|
cpu->mem_io_pc = retaddr;
|
|
if (mr != &io_mem_rom && mr != &io_mem_notdirty && !cpu->can_do_io) {
|
|
cpu_io_recompile(cpu, retaddr);
|
|
}
|
|
|
|
cpu->mem_io_vaddr = addr;
|
|
memory_region_dispatch_read(mr, physaddr, &val, size, iotlbentry->attrs);
|
|
return val;
|
|
}
|
|
|
|
static void io_writex(CPUArchState *env, CPUIOTLBEntry *iotlbentry,
|
|
uint64_t val, target_ulong addr,
|
|
uintptr_t retaddr, int size)
|
|
{
|
|
CPUState *cpu = ENV_GET_CPU(env);
|
|
hwaddr physaddr = iotlbentry->addr;
|
|
MemoryRegion *mr = iotlb_to_region(cpu, physaddr, iotlbentry->attrs);
|
|
|
|
physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
|
|
if (mr != &io_mem_rom && mr != &io_mem_notdirty && !cpu->can_do_io) {
|
|
cpu_io_recompile(cpu, retaddr);
|
|
}
|
|
|
|
cpu->mem_io_vaddr = addr;
|
|
cpu->mem_io_pc = retaddr;
|
|
memory_region_dispatch_write(mr, physaddr, val, size, iotlbentry->attrs);
|
|
}
|
|
|
|
/* Return true if ADDR is present in the victim tlb, and has been copied
|
|
back to the main tlb. */
|
|
static bool victim_tlb_hit(CPUArchState *env, size_t mmu_idx, size_t index,
|
|
size_t elt_ofs, target_ulong page)
|
|
{
|
|
size_t vidx;
|
|
for (vidx = 0; vidx < CPU_VTLB_SIZE; ++vidx) {
|
|
CPUTLBEntry *vtlb = &env->tlb_v_table[mmu_idx][vidx];
|
|
target_ulong cmp = *(target_ulong *)((uintptr_t)vtlb + elt_ofs);
|
|
|
|
if (cmp == page) {
|
|
/* Found entry in victim tlb, swap tlb and iotlb. */
|
|
CPUTLBEntry tmptlb, *tlb = &env->tlb_table[mmu_idx][index];
|
|
CPUIOTLBEntry tmpio, *io = &env->iotlb[mmu_idx][index];
|
|
CPUIOTLBEntry *vio = &env->iotlb_v[mmu_idx][vidx];
|
|
|
|
tmptlb = *tlb; *tlb = *vtlb; *vtlb = tmptlb;
|
|
tmpio = *io; *io = *vio; *vio = tmpio;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* Macro to call the above, with local variables from the use context. */
|
|
#define VICTIM_TLB_HIT(TY, ADDR) \
|
|
victim_tlb_hit(env, mmu_idx, index, offsetof(CPUTLBEntry, TY), \
|
|
(ADDR) & TARGET_PAGE_MASK)
|
|
|
|
/* Probe for whether the specified guest write access is permitted.
|
|
* If it is not permitted then an exception will be taken in the same
|
|
* way as if this were a real write access (and we will not return).
|
|
* Otherwise the function will return, and there will be a valid
|
|
* entry in the TLB for this access.
|
|
*/
|
|
void probe_write(CPUArchState *env, target_ulong addr, int mmu_idx,
|
|
uintptr_t retaddr)
|
|
{
|
|
int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
target_ulong tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
|
|
|
|
if ((addr & TARGET_PAGE_MASK)
|
|
!= (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
|
|
/* TLB entry is for a different page */
|
|
if (!VICTIM_TLB_HIT(addr_write, addr)) {
|
|
tlb_fill(ENV_GET_CPU(env), addr, MMU_DATA_STORE, mmu_idx, retaddr);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Probe for a read-modify-write atomic operation. Do not allow unaligned
|
|
* operations, or io operations to proceed. Return the host address. */
|
|
static void *atomic_mmu_lookup(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
size_t mmu_idx = get_mmuidx(oi);
|
|
size_t index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
CPUTLBEntry *tlbe = &env->tlb_table[mmu_idx][index];
|
|
target_ulong tlb_addr = tlbe->addr_write;
|
|
TCGMemOp mop = get_memop(oi);
|
|
int a_bits = get_alignment_bits(mop);
|
|
int s_bits = mop & MO_SIZE;
|
|
|
|
/* Adjust the given return address. */
|
|
retaddr -= GETPC_ADJ;
|
|
|
|
/* Enforce guest required alignment. */
|
|
if (unlikely(a_bits > 0 && (addr & ((1 << a_bits) - 1)))) {
|
|
/* ??? Maybe indicate atomic op to cpu_unaligned_access */
|
|
cpu_unaligned_access(ENV_GET_CPU(env), addr, MMU_DATA_STORE,
|
|
mmu_idx, retaddr);
|
|
}
|
|
|
|
/* Enforce qemu required alignment. */
|
|
if (unlikely(addr & ((1 << s_bits) - 1))) {
|
|
/* We get here if guest alignment was not requested,
|
|
or was not enforced by cpu_unaligned_access above.
|
|
We might widen the access and emulate, but for now
|
|
mark an exception and exit the cpu loop. */
|
|
goto stop_the_world;
|
|
}
|
|
|
|
/* Check TLB entry and enforce page permissions. */
|
|
if ((addr & TARGET_PAGE_MASK)
|
|
!= (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
|
|
if (!VICTIM_TLB_HIT(addr_write, addr)) {
|
|
tlb_fill(ENV_GET_CPU(env), addr, MMU_DATA_STORE, mmu_idx, retaddr);
|
|
}
|
|
tlb_addr = tlbe->addr_write;
|
|
}
|
|
|
|
/* Notice an IO access, or a notdirty page. */
|
|
if (unlikely(tlb_addr & ~TARGET_PAGE_MASK)) {
|
|
/* There's really nothing that can be done to
|
|
support this apart from stop-the-world. */
|
|
goto stop_the_world;
|
|
}
|
|
|
|
/* Let the guest notice RMW on a write-only page. */
|
|
if (unlikely(tlbe->addr_read != tlb_addr)) {
|
|
tlb_fill(ENV_GET_CPU(env), addr, MMU_DATA_LOAD, mmu_idx, retaddr);
|
|
/* Since we don't support reads and writes to different addresses,
|
|
and we do have the proper page loaded for write, this shouldn't
|
|
ever return. But just in case, handle via stop-the-world. */
|
|
goto stop_the_world;
|
|
}
|
|
|
|
return (void *)((uintptr_t)addr + tlbe->addend);
|
|
|
|
stop_the_world:
|
|
cpu_loop_exit_atomic(ENV_GET_CPU(env), retaddr);
|
|
}
|
|
|
|
#ifdef TARGET_WORDS_BIGENDIAN
|
|
# define TGT_BE(X) (X)
|
|
# define TGT_LE(X) BSWAP(X)
|
|
#else
|
|
# define TGT_BE(X) BSWAP(X)
|
|
# define TGT_LE(X) (X)
|
|
#endif
|
|
|
|
#define MMUSUFFIX _mmu
|
|
|
|
#define DATA_SIZE 1
|
|
#include "softmmu_template.h"
|
|
|
|
#define DATA_SIZE 2
|
|
#include "softmmu_template.h"
|
|
|
|
#define DATA_SIZE 4
|
|
#include "softmmu_template.h"
|
|
|
|
#define DATA_SIZE 8
|
|
#include "softmmu_template.h"
|
|
|
|
/* First set of helpers allows passing in of OI and RETADDR. This makes
|
|
them callable from other helpers. */
|
|
|
|
#define EXTRA_ARGS , TCGMemOpIdx oi, uintptr_t retaddr
|
|
#define ATOMIC_NAME(X) \
|
|
HELPER(glue(glue(glue(atomic_ ## X, SUFFIX), END), _mmu))
|
|
#define ATOMIC_MMU_LOOKUP atomic_mmu_lookup(env, addr, oi, retaddr)
|
|
|
|
#define DATA_SIZE 1
|
|
#include "atomic_template.h"
|
|
|
|
#define DATA_SIZE 2
|
|
#include "atomic_template.h"
|
|
|
|
#define DATA_SIZE 4
|
|
#include "atomic_template.h"
|
|
|
|
#ifdef CONFIG_ATOMIC64
|
|
#define DATA_SIZE 8
|
|
#include "atomic_template.h"
|
|
#endif
|
|
|
|
#ifdef CONFIG_ATOMIC128
|
|
#define DATA_SIZE 16
|
|
#include "atomic_template.h"
|
|
#endif
|
|
|
|
/* Second set of helpers are directly callable from TCG as helpers. */
|
|
|
|
#undef EXTRA_ARGS
|
|
#undef ATOMIC_NAME
|
|
#undef ATOMIC_MMU_LOOKUP
|
|
#define EXTRA_ARGS , TCGMemOpIdx oi
|
|
#define ATOMIC_NAME(X) HELPER(glue(glue(atomic_ ## X, SUFFIX), END))
|
|
#define ATOMIC_MMU_LOOKUP atomic_mmu_lookup(env, addr, oi, GETPC())
|
|
|
|
#define DATA_SIZE 1
|
|
#include "atomic_template.h"
|
|
|
|
#define DATA_SIZE 2
|
|
#include "atomic_template.h"
|
|
|
|
#define DATA_SIZE 4
|
|
#include "atomic_template.h"
|
|
|
|
#ifdef CONFIG_ATOMIC64
|
|
#define DATA_SIZE 8
|
|
#include "atomic_template.h"
|
|
#endif
|
|
|
|
/* Code access functions. */
|
|
|
|
#undef MMUSUFFIX
|
|
#define MMUSUFFIX _cmmu
|
|
#undef GETPC
|
|
#define GETPC() ((uintptr_t)0)
|
|
#define SOFTMMU_CODE_ACCESS
|
|
|
|
#define DATA_SIZE 1
|
|
#include "softmmu_template.h"
|
|
|
|
#define DATA_SIZE 2
|
|
#include "softmmu_template.h"
|
|
|
|
#define DATA_SIZE 4
|
|
#include "softmmu_template.h"
|
|
|
|
#define DATA_SIZE 8
|
|
#include "softmmu_template.h"
|