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/*
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* virtual page mapping and translated block 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <inttypes.h> |
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#include <sys/mman.h> |
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#include "config.h" |
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#include "cpu.h" |
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#include "exec-all.h" |
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//#define DEBUG_TB_INVALIDATE
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//#define DEBUG_FLUSH
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//#define DEBUG_TLB
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/* make various TB consistency checks */
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//#define DEBUG_TB_CHECK
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//#define DEBUG_TLB_CHECK
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/* threshold to flush the translated code buffer */
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#define CODE_GEN_BUFFER_MAX_SIZE (CODE_GEN_BUFFER_SIZE - CODE_GEN_MAX_SIZE)
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#define SMC_BITMAP_USE_THRESHOLD 10 |
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#define MMAP_AREA_START 0x00000000 |
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#define MMAP_AREA_END 0xa8000000 |
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TranslationBlock tbs[CODE_GEN_MAX_BLOCKS]; |
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TranslationBlock *tb_hash[CODE_GEN_HASH_SIZE]; |
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TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE]; |
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int nb_tbs;
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/* any access to the tbs or the page table must use this lock */
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spinlock_t tb_lock = SPIN_LOCK_UNLOCKED; |
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uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE]; |
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uint8_t *code_gen_ptr; |
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int phys_ram_size;
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int phys_ram_fd;
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uint8_t *phys_ram_base; |
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uint8_t *phys_ram_dirty; |
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typedef struct PageDesc { |
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/* offset in memory of the page + io_index in the low 12 bits */
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unsigned long phys_offset; |
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/* list of TBs intersecting this physical page */
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TranslationBlock *first_tb; |
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/* in order to optimize self modifying code, we count the number
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of lookups we do to a given page to use a bitmap */
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unsigned int code_write_count; |
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uint8_t *code_bitmap; |
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#if defined(CONFIG_USER_ONLY)
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unsigned long flags; |
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#endif
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} PageDesc; |
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typedef struct VirtPageDesc { |
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/* physical address of code page. It is valid only if 'valid_tag'
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matches 'virt_valid_tag' */
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target_ulong phys_addr; |
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unsigned int valid_tag; |
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#if !defined(CONFIG_SOFTMMU)
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/* original page access rights. It is valid only if 'valid_tag'
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matches 'virt_valid_tag' */
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unsigned int prot; |
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#endif
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} VirtPageDesc; |
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#define L2_BITS 10 |
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#define L1_BITS (32 - L2_BITS - TARGET_PAGE_BITS) |
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#define L1_SIZE (1 << L1_BITS) |
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#define L2_SIZE (1 << L2_BITS) |
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static void io_mem_init(void); |
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unsigned long real_host_page_size; |
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unsigned long host_page_bits; |
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unsigned long host_page_size; |
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unsigned long host_page_mask; |
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static PageDesc *l1_map[L1_SIZE];
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#if !defined(CONFIG_USER_ONLY)
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static VirtPageDesc *l1_virt_map[L1_SIZE];
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static unsigned int virt_valid_tag; |
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#endif
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/* io memory support */
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CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
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CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
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static int io_mem_nb; |
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/* log support */
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char *logfilename = "/tmp/qemu.log"; |
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FILE *logfile; |
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int loglevel;
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static void page_init(void) |
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{ |
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/* NOTE: we can always suppose that host_page_size >=
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TARGET_PAGE_SIZE */
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real_host_page_size = getpagesize(); |
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if (host_page_size == 0) |
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host_page_size = real_host_page_size; |
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if (host_page_size < TARGET_PAGE_SIZE)
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host_page_size = TARGET_PAGE_SIZE; |
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host_page_bits = 0;
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while ((1 << host_page_bits) < host_page_size) |
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host_page_bits++; |
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host_page_mask = ~(host_page_size - 1);
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#if !defined(CONFIG_USER_ONLY)
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virt_valid_tag = 1;
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#endif
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} |
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static inline PageDesc *page_find_alloc(unsigned int index) |
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{ |
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PageDesc **lp, *p; |
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lp = &l1_map[index >> L2_BITS]; |
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p = *lp; |
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if (!p) {
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/* allocate if not found */
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p = qemu_malloc(sizeof(PageDesc) * L2_SIZE);
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memset(p, 0, sizeof(PageDesc) * L2_SIZE); |
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*lp = p; |
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} |
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return p + (index & (L2_SIZE - 1)); |
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} |
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static inline PageDesc *page_find(unsigned int index) |
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{ |
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PageDesc *p; |
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p = l1_map[index >> L2_BITS]; |
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if (!p)
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return 0; |
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return p + (index & (L2_SIZE - 1)); |
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} |
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#if !defined(CONFIG_USER_ONLY)
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static void tlb_protect_code(CPUState *env, uint32_t addr); |
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static void tlb_unprotect_code(CPUState *env, uint32_t addr); |
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static void tlb_unprotect_code_phys(CPUState *env, uint32_t phys_addr, target_ulong vaddr); |
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static inline VirtPageDesc *virt_page_find_alloc(unsigned int index) |
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{ |
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VirtPageDesc **lp, *p; |
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lp = &l1_virt_map[index >> L2_BITS]; |
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p = *lp; |
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if (!p) {
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/* allocate if not found */
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p = qemu_malloc(sizeof(VirtPageDesc) * L2_SIZE);
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memset(p, 0, sizeof(VirtPageDesc) * L2_SIZE); |
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*lp = p; |
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} |
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return p + (index & (L2_SIZE - 1)); |
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} |
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static inline VirtPageDesc *virt_page_find(unsigned int index) |
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{ |
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VirtPageDesc *p; |
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p = l1_virt_map[index >> L2_BITS]; |
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if (!p)
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return 0; |
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return p + (index & (L2_SIZE - 1)); |
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} |
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static void virt_page_flush(void) |
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{ |
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int i, j;
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VirtPageDesc *p; |
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virt_valid_tag++; |
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if (virt_valid_tag == 0) { |
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virt_valid_tag = 1;
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for(i = 0; i < L1_SIZE; i++) { |
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p = l1_virt_map[i]; |
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if (p) {
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for(j = 0; j < L2_SIZE; j++) |
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p[j].valid_tag = 0;
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} |
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} |
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} |
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} |
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#else
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static void virt_page_flush(void) |
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{ |
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} |
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#endif
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void cpu_exec_init(void) |
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{ |
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if (!code_gen_ptr) {
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code_gen_ptr = code_gen_buffer; |
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page_init(); |
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io_mem_init(); |
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} |
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} |
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static inline void invalidate_page_bitmap(PageDesc *p) |
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{ |
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if (p->code_bitmap) {
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qemu_free(p->code_bitmap); |
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p->code_bitmap = NULL;
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} |
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p->code_write_count = 0;
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} |
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/* set to NULL all the 'first_tb' fields in all PageDescs */
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static void page_flush_tb(void) |
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{ |
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int i, j;
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PageDesc *p; |
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for(i = 0; i < L1_SIZE; i++) { |
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p = l1_map[i]; |
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if (p) {
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for(j = 0; j < L2_SIZE; j++) { |
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p->first_tb = NULL;
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invalidate_page_bitmap(p); |
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p++; |
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} |
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} |
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} |
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} |
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/* flush all the translation blocks */
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/* XXX: tb_flush is currently not thread safe */
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void tb_flush(CPUState *env)
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{ |
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int i;
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#if defined(DEBUG_FLUSH)
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printf("qemu: flush code_size=%d nb_tbs=%d avg_tb_size=%d\n",
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code_gen_ptr - code_gen_buffer, |
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nb_tbs, |
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nb_tbs > 0 ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0); |
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#endif
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nb_tbs = 0;
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for(i = 0;i < CODE_GEN_HASH_SIZE; i++) |
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tb_hash[i] = NULL;
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virt_page_flush(); |
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for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) |
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tb_phys_hash[i] = NULL;
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page_flush_tb(); |
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code_gen_ptr = code_gen_buffer; |
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/* XXX: flush processor icache at this point if cache flush is
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expensive */
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} |
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#ifdef DEBUG_TB_CHECK
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static void tb_invalidate_check(unsigned long address) |
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{ |
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TranslationBlock *tb; |
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int i;
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address &= TARGET_PAGE_MASK; |
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for(i = 0;i < CODE_GEN_HASH_SIZE; i++) { |
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for(tb = tb_hash[i]; tb != NULL; tb = tb->hash_next) { |
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if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
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address >= tb->pc + tb->size)) { |
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printf("ERROR invalidate: address=%08lx PC=%08lx size=%04x\n",
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address, tb->pc, tb->size); |
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} |
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} |
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} |
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} |
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/* verify that all the pages have correct rights for code */
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static void tb_page_check(void) |
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{ |
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TranslationBlock *tb; |
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int i, flags1, flags2;
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for(i = 0;i < CODE_GEN_HASH_SIZE; i++) { |
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for(tb = tb_hash[i]; tb != NULL; tb = tb->hash_next) { |
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flags1 = page_get_flags(tb->pc); |
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flags2 = page_get_flags(tb->pc + tb->size - 1);
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if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
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printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
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tb->pc, tb->size, flags1, flags2); |
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} |
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} |
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} |
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} |
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void tb_jmp_check(TranslationBlock *tb)
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{ |
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TranslationBlock *tb1; |
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unsigned int n1; |
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/* suppress any remaining jumps to this TB */
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tb1 = tb->jmp_first; |
321 |
for(;;) {
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n1 = (long)tb1 & 3; |
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tb1 = (TranslationBlock *)((long)tb1 & ~3); |
324 |
if (n1 == 2) |
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break;
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tb1 = tb1->jmp_next[n1]; |
327 |
} |
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/* check end of list */
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if (tb1 != tb) {
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printf("ERROR: jmp_list from 0x%08lx\n", (long)tb); |
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} |
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} |
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#endif
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/* invalidate one TB */
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static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb, |
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int next_offset)
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{ |
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TranslationBlock *tb1; |
341 |
for(;;) {
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tb1 = *ptb; |
343 |
if (tb1 == tb) {
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*ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
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break;
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} |
347 |
ptb = (TranslationBlock **)((char *)tb1 + next_offset);
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} |
349 |
} |
350 |
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static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) |
352 |
{ |
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TranslationBlock *tb1; |
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unsigned int n1; |
355 |
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for(;;) {
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tb1 = *ptb; |
358 |
n1 = (long)tb1 & 3; |
359 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
360 |
if (tb1 == tb) {
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*ptb = tb1->page_next[n1]; |
362 |
break;
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363 |
} |
364 |
ptb = &tb1->page_next[n1]; |
365 |
} |
366 |
} |
367 |
|
368 |
static inline void tb_jmp_remove(TranslationBlock *tb, int n) |
369 |
{ |
370 |
TranslationBlock *tb1, **ptb; |
371 |
unsigned int n1; |
372 |
|
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ptb = &tb->jmp_next[n]; |
374 |
tb1 = *ptb; |
375 |
if (tb1) {
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376 |
/* find tb(n) in circular list */
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377 |
for(;;) {
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tb1 = *ptb; |
379 |
n1 = (long)tb1 & 3; |
380 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
381 |
if (n1 == n && tb1 == tb)
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break;
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383 |
if (n1 == 2) { |
384 |
ptb = &tb1->jmp_first; |
385 |
} else {
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386 |
ptb = &tb1->jmp_next[n1]; |
387 |
} |
388 |
} |
389 |
/* now we can suppress tb(n) from the list */
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390 |
*ptb = tb->jmp_next[n]; |
391 |
|
392 |
tb->jmp_next[n] = NULL;
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} |
394 |
} |
395 |
|
396 |
/* reset the jump entry 'n' of a TB so that it is not chained to
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397 |
another TB */
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398 |
static inline void tb_reset_jump(TranslationBlock *tb, int n) |
399 |
{ |
400 |
tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); |
401 |
} |
402 |
|
403 |
static inline void tb_invalidate(TranslationBlock *tb) |
404 |
{ |
405 |
unsigned int h, n1; |
406 |
TranslationBlock *tb1, *tb2, **ptb; |
407 |
|
408 |
tb_invalidated_flag = 1;
|
409 |
|
410 |
/* remove the TB from the hash list */
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411 |
h = tb_hash_func(tb->pc); |
412 |
ptb = &tb_hash[h]; |
413 |
for(;;) {
|
414 |
tb1 = *ptb; |
415 |
/* NOTE: the TB is not necessarily linked in the hash. It
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416 |
indicates that it is not currently used */
|
417 |
if (tb1 == NULL) |
418 |
return;
|
419 |
if (tb1 == tb) {
|
420 |
*ptb = tb1->hash_next; |
421 |
break;
|
422 |
} |
423 |
ptb = &tb1->hash_next; |
424 |
} |
425 |
|
426 |
/* suppress this TB from the two jump lists */
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427 |
tb_jmp_remove(tb, 0);
|
428 |
tb_jmp_remove(tb, 1);
|
429 |
|
430 |
/* suppress any remaining jumps to this TB */
|
431 |
tb1 = tb->jmp_first; |
432 |
for(;;) {
|
433 |
n1 = (long)tb1 & 3; |
434 |
if (n1 == 2) |
435 |
break;
|
436 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
437 |
tb2 = tb1->jmp_next[n1]; |
438 |
tb_reset_jump(tb1, n1); |
439 |
tb1->jmp_next[n1] = NULL;
|
440 |
tb1 = tb2; |
441 |
} |
442 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ |
443 |
} |
444 |
|
445 |
static inline void tb_phys_invalidate(TranslationBlock *tb, unsigned int page_addr) |
446 |
{ |
447 |
PageDesc *p; |
448 |
unsigned int h; |
449 |
target_ulong phys_pc; |
450 |
|
451 |
/* remove the TB from the hash list */
|
452 |
phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
453 |
h = tb_phys_hash_func(phys_pc); |
454 |
tb_remove(&tb_phys_hash[h], tb, |
455 |
offsetof(TranslationBlock, phys_hash_next)); |
456 |
|
457 |
/* remove the TB from the page list */
|
458 |
if (tb->page_addr[0] != page_addr) { |
459 |
p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
|
460 |
tb_page_remove(&p->first_tb, tb); |
461 |
invalidate_page_bitmap(p); |
462 |
} |
463 |
if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { |
464 |
p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
|
465 |
tb_page_remove(&p->first_tb, tb); |
466 |
invalidate_page_bitmap(p); |
467 |
} |
468 |
|
469 |
tb_invalidate(tb); |
470 |
} |
471 |
|
472 |
static inline void set_bits(uint8_t *tab, int start, int len) |
473 |
{ |
474 |
int end, mask, end1;
|
475 |
|
476 |
end = start + len; |
477 |
tab += start >> 3;
|
478 |
mask = 0xff << (start & 7); |
479 |
if ((start & ~7) == (end & ~7)) { |
480 |
if (start < end) {
|
481 |
mask &= ~(0xff << (end & 7)); |
482 |
*tab |= mask; |
483 |
} |
484 |
} else {
|
485 |
*tab++ |= mask; |
486 |
start = (start + 8) & ~7; |
487 |
end1 = end & ~7;
|
488 |
while (start < end1) {
|
489 |
*tab++ = 0xff;
|
490 |
start += 8;
|
491 |
} |
492 |
if (start < end) {
|
493 |
mask = ~(0xff << (end & 7)); |
494 |
*tab |= mask; |
495 |
} |
496 |
} |
497 |
} |
498 |
|
499 |
static void build_page_bitmap(PageDesc *p) |
500 |
{ |
501 |
int n, tb_start, tb_end;
|
502 |
TranslationBlock *tb; |
503 |
|
504 |
p->code_bitmap = qemu_malloc(TARGET_PAGE_SIZE / 8);
|
505 |
if (!p->code_bitmap)
|
506 |
return;
|
507 |
memset(p->code_bitmap, 0, TARGET_PAGE_SIZE / 8); |
508 |
|
509 |
tb = p->first_tb; |
510 |
while (tb != NULL) { |
511 |
n = (long)tb & 3; |
512 |
tb = (TranslationBlock *)((long)tb & ~3); |
513 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
514 |
if (n == 0) { |
515 |
/* NOTE: tb_end may be after the end of the page, but
|
516 |
it is not a problem */
|
517 |
tb_start = tb->pc & ~TARGET_PAGE_MASK; |
518 |
tb_end = tb_start + tb->size; |
519 |
if (tb_end > TARGET_PAGE_SIZE)
|
520 |
tb_end = TARGET_PAGE_SIZE; |
521 |
} else {
|
522 |
tb_start = 0;
|
523 |
tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
524 |
} |
525 |
set_bits(p->code_bitmap, tb_start, tb_end - tb_start); |
526 |
tb = tb->page_next[n]; |
527 |
} |
528 |
} |
529 |
|
530 |
/* invalidate all TBs which intersect with the target physical page
|
531 |
starting in range [start;end[. NOTE: start and end must refer to
|
532 |
the same physical page. 'vaddr' is a virtual address referencing
|
533 |
the physical page of code. It is only used an a hint if there is no
|
534 |
code left. */
|
535 |
static void tb_invalidate_phys_page_range(target_ulong start, target_ulong end, |
536 |
target_ulong vaddr) |
537 |
{ |
538 |
int n;
|
539 |
PageDesc *p; |
540 |
TranslationBlock *tb, *tb_next; |
541 |
target_ulong tb_start, tb_end; |
542 |
|
543 |
p = page_find(start >> TARGET_PAGE_BITS); |
544 |
if (!p)
|
545 |
return;
|
546 |
if (!p->code_bitmap &&
|
547 |
++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD) { |
548 |
/* build code bitmap */
|
549 |
build_page_bitmap(p); |
550 |
} |
551 |
|
552 |
/* we remove all the TBs in the range [start, end[ */
|
553 |
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
554 |
tb = p->first_tb; |
555 |
while (tb != NULL) { |
556 |
n = (long)tb & 3; |
557 |
tb = (TranslationBlock *)((long)tb & ~3); |
558 |
tb_next = tb->page_next[n]; |
559 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
560 |
if (n == 0) { |
561 |
/* NOTE: tb_end may be after the end of the page, but
|
562 |
it is not a problem */
|
563 |
tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
564 |
tb_end = tb_start + tb->size; |
565 |
} else {
|
566 |
tb_start = tb->page_addr[1];
|
567 |
tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
568 |
} |
569 |
if (!(tb_end <= start || tb_start >= end)) {
|
570 |
tb_phys_invalidate(tb, -1);
|
571 |
} |
572 |
tb = tb_next; |
573 |
} |
574 |
#if !defined(CONFIG_USER_ONLY)
|
575 |
/* if no code remaining, no need to continue to use slow writes */
|
576 |
if (!p->first_tb) {
|
577 |
invalidate_page_bitmap(p); |
578 |
tlb_unprotect_code_phys(cpu_single_env, start, vaddr); |
579 |
} |
580 |
#endif
|
581 |
} |
582 |
|
583 |
/* len must be <= 8 and start must be a multiple of len */
|
584 |
static inline void tb_invalidate_phys_page_fast(target_ulong start, int len, target_ulong vaddr) |
585 |
{ |
586 |
PageDesc *p; |
587 |
int offset, b;
|
588 |
#if 0
|
589 |
if (cpu_single_env->cr[0] & CR0_PE_MASK) {
|
590 |
printf("modifying code at 0x%x size=%d EIP=%x\n",
|
591 |
(vaddr & TARGET_PAGE_MASK) | (start & ~TARGET_PAGE_MASK), len,
|
592 |
cpu_single_env->eip);
|
593 |
}
|
594 |
#endif
|
595 |
p = page_find(start >> TARGET_PAGE_BITS); |
596 |
if (!p)
|
597 |
return;
|
598 |
if (p->code_bitmap) {
|
599 |
offset = start & ~TARGET_PAGE_MASK; |
600 |
b = p->code_bitmap[offset >> 3] >> (offset & 7); |
601 |
if (b & ((1 << len) - 1)) |
602 |
goto do_invalidate;
|
603 |
} else {
|
604 |
do_invalidate:
|
605 |
tb_invalidate_phys_page_range(start, start + len, vaddr); |
606 |
} |
607 |
} |
608 |
|
609 |
/* invalidate all TBs which intersect with the target virtual page
|
610 |
starting in range [start;end[. This function is usually used when
|
611 |
the target processor flushes its I-cache. NOTE: start and end must
|
612 |
refer to the same physical page */
|
613 |
void tb_invalidate_page_range(target_ulong start, target_ulong end)
|
614 |
{ |
615 |
int n;
|
616 |
PageDesc *p; |
617 |
TranslationBlock *tb, *tb_next; |
618 |
target_ulong pc; |
619 |
target_ulong phys_start; |
620 |
|
621 |
#if !defined(CONFIG_USER_ONLY)
|
622 |
{ |
623 |
VirtPageDesc *vp; |
624 |
vp = virt_page_find(start >> TARGET_PAGE_BITS); |
625 |
if (!vp)
|
626 |
return;
|
627 |
if (vp->valid_tag != virt_valid_tag)
|
628 |
return;
|
629 |
phys_start = vp->phys_addr + (start & ~TARGET_PAGE_MASK); |
630 |
} |
631 |
#else
|
632 |
phys_start = start; |
633 |
#endif
|
634 |
p = page_find(phys_start >> TARGET_PAGE_BITS); |
635 |
if (!p)
|
636 |
return;
|
637 |
/* we remove all the TBs in the range [start, end[ */
|
638 |
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
639 |
tb = p->first_tb; |
640 |
while (tb != NULL) { |
641 |
n = (long)tb & 3; |
642 |
tb = (TranslationBlock *)((long)tb & ~3); |
643 |
tb_next = tb->page_next[n]; |
644 |
pc = tb->pc; |
645 |
if (!((pc + tb->size) <= start || pc >= end)) {
|
646 |
tb_phys_invalidate(tb, -1);
|
647 |
} |
648 |
tb = tb_next; |
649 |
} |
650 |
#if !defined(CONFIG_USER_ONLY)
|
651 |
/* if no code remaining, no need to continue to use slow writes */
|
652 |
if (!p->first_tb)
|
653 |
tlb_unprotect_code(cpu_single_env, start); |
654 |
#endif
|
655 |
} |
656 |
|
657 |
#if !defined(CONFIG_SOFTMMU)
|
658 |
static void tb_invalidate_phys_page(target_ulong addr) |
659 |
{ |
660 |
int n;
|
661 |
PageDesc *p; |
662 |
TranslationBlock *tb; |
663 |
|
664 |
addr &= TARGET_PAGE_MASK; |
665 |
p = page_find(addr >> TARGET_PAGE_BITS); |
666 |
if (!p)
|
667 |
return;
|
668 |
tb = p->first_tb; |
669 |
while (tb != NULL) { |
670 |
n = (long)tb & 3; |
671 |
tb = (TranslationBlock *)((long)tb & ~3); |
672 |
tb_phys_invalidate(tb, addr); |
673 |
tb = tb->page_next[n]; |
674 |
} |
675 |
p->first_tb = NULL;
|
676 |
} |
677 |
#endif
|
678 |
|
679 |
/* add the tb in the target page and protect it if necessary */
|
680 |
static inline void tb_alloc_page(TranslationBlock *tb, |
681 |
unsigned int n, unsigned int page_addr) |
682 |
{ |
683 |
PageDesc *p; |
684 |
TranslationBlock *last_first_tb; |
685 |
|
686 |
tb->page_addr[n] = page_addr; |
687 |
p = page_find(page_addr >> TARGET_PAGE_BITS); |
688 |
tb->page_next[n] = p->first_tb; |
689 |
last_first_tb = p->first_tb; |
690 |
p->first_tb = (TranslationBlock *)((long)tb | n);
|
691 |
invalidate_page_bitmap(p); |
692 |
|
693 |
#if defined(CONFIG_USER_ONLY)
|
694 |
if (p->flags & PAGE_WRITE) {
|
695 |
unsigned long host_start, host_end, addr; |
696 |
int prot;
|
697 |
|
698 |
/* force the host page as non writable (writes will have a
|
699 |
page fault + mprotect overhead) */
|
700 |
host_start = page_addr & host_page_mask; |
701 |
host_end = host_start + host_page_size; |
702 |
prot = 0;
|
703 |
for(addr = host_start; addr < host_end; addr += TARGET_PAGE_SIZE)
|
704 |
prot |= page_get_flags(addr); |
705 |
mprotect((void *)host_start, host_page_size,
|
706 |
(prot & PAGE_BITS) & ~PAGE_WRITE); |
707 |
#ifdef DEBUG_TB_INVALIDATE
|
708 |
printf("protecting code page: 0x%08lx\n",
|
709 |
host_start); |
710 |
#endif
|
711 |
p->flags &= ~PAGE_WRITE; |
712 |
} |
713 |
#else
|
714 |
/* if some code is already present, then the pages are already
|
715 |
protected. So we handle the case where only the first TB is
|
716 |
allocated in a physical page */
|
717 |
if (!last_first_tb) {
|
718 |
target_ulong virt_addr; |
719 |
|
720 |
virt_addr = (tb->pc & TARGET_PAGE_MASK) + (n << TARGET_PAGE_BITS); |
721 |
tlb_protect_code(cpu_single_env, virt_addr); |
722 |
} |
723 |
#endif
|
724 |
} |
725 |
|
726 |
/* Allocate a new translation block. Flush the translation buffer if
|
727 |
too many translation blocks or too much generated code. */
|
728 |
TranslationBlock *tb_alloc(unsigned long pc) |
729 |
{ |
730 |
TranslationBlock *tb; |
731 |
|
732 |
if (nb_tbs >= CODE_GEN_MAX_BLOCKS ||
|
733 |
(code_gen_ptr - code_gen_buffer) >= CODE_GEN_BUFFER_MAX_SIZE) |
734 |
return NULL; |
735 |
tb = &tbs[nb_tbs++]; |
736 |
tb->pc = pc; |
737 |
return tb;
|
738 |
} |
739 |
|
740 |
/* add a new TB and link it to the physical page tables. phys_page2 is
|
741 |
(-1) to indicate that only one page contains the TB. */
|
742 |
void tb_link_phys(TranslationBlock *tb,
|
743 |
target_ulong phys_pc, target_ulong phys_page2) |
744 |
{ |
745 |
unsigned int h; |
746 |
TranslationBlock **ptb; |
747 |
|
748 |
/* add in the physical hash table */
|
749 |
h = tb_phys_hash_func(phys_pc); |
750 |
ptb = &tb_phys_hash[h]; |
751 |
tb->phys_hash_next = *ptb; |
752 |
*ptb = tb; |
753 |
|
754 |
/* add in the page list */
|
755 |
tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
|
756 |
if (phys_page2 != -1) |
757 |
tb_alloc_page(tb, 1, phys_page2);
|
758 |
else
|
759 |
tb->page_addr[1] = -1; |
760 |
#ifdef DEBUG_TB_CHECK
|
761 |
tb_page_check(); |
762 |
#endif
|
763 |
} |
764 |
|
765 |
/* link the tb with the other TBs */
|
766 |
void tb_link(TranslationBlock *tb)
|
767 |
{ |
768 |
#if !defined(CONFIG_USER_ONLY)
|
769 |
{ |
770 |
VirtPageDesc *vp; |
771 |
target_ulong addr; |
772 |
|
773 |
/* save the code memory mappings (needed to invalidate the code) */
|
774 |
addr = tb->pc & TARGET_PAGE_MASK; |
775 |
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS); |
776 |
#ifdef DEBUG_TLB_CHECK
|
777 |
if (vp->valid_tag == virt_valid_tag &&
|
778 |
vp->phys_addr != tb->page_addr[0]) {
|
779 |
printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n",
|
780 |
addr, tb->page_addr[0], vp->phys_addr);
|
781 |
} |
782 |
#endif
|
783 |
vp->phys_addr = tb->page_addr[0];
|
784 |
if (vp->valid_tag != virt_valid_tag) {
|
785 |
vp->valid_tag = virt_valid_tag; |
786 |
#if !defined(CONFIG_SOFTMMU)
|
787 |
vp->prot = 0;
|
788 |
#endif
|
789 |
} |
790 |
|
791 |
if (tb->page_addr[1] != -1) { |
792 |
addr += TARGET_PAGE_SIZE; |
793 |
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS); |
794 |
#ifdef DEBUG_TLB_CHECK
|
795 |
if (vp->valid_tag == virt_valid_tag &&
|
796 |
vp->phys_addr != tb->page_addr[1]) {
|
797 |
printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n",
|
798 |
addr, tb->page_addr[1], vp->phys_addr);
|
799 |
} |
800 |
#endif
|
801 |
vp->phys_addr = tb->page_addr[1];
|
802 |
if (vp->valid_tag != virt_valid_tag) {
|
803 |
vp->valid_tag = virt_valid_tag; |
804 |
#if !defined(CONFIG_SOFTMMU)
|
805 |
vp->prot = 0;
|
806 |
#endif
|
807 |
} |
808 |
} |
809 |
} |
810 |
#endif
|
811 |
|
812 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); |
813 |
tb->jmp_next[0] = NULL; |
814 |
tb->jmp_next[1] = NULL; |
815 |
|
816 |
/* init original jump addresses */
|
817 |
if (tb->tb_next_offset[0] != 0xffff) |
818 |
tb_reset_jump(tb, 0);
|
819 |
if (tb->tb_next_offset[1] != 0xffff) |
820 |
tb_reset_jump(tb, 1);
|
821 |
} |
822 |
|
823 |
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
|
824 |
tb[1].tc_ptr. Return NULL if not found */
|
825 |
TranslationBlock *tb_find_pc(unsigned long tc_ptr) |
826 |
{ |
827 |
int m_min, m_max, m;
|
828 |
unsigned long v; |
829 |
TranslationBlock *tb; |
830 |
|
831 |
if (nb_tbs <= 0) |
832 |
return NULL; |
833 |
if (tc_ptr < (unsigned long)code_gen_buffer || |
834 |
tc_ptr >= (unsigned long)code_gen_ptr) |
835 |
return NULL; |
836 |
/* binary search (cf Knuth) */
|
837 |
m_min = 0;
|
838 |
m_max = nb_tbs - 1;
|
839 |
while (m_min <= m_max) {
|
840 |
m = (m_min + m_max) >> 1;
|
841 |
tb = &tbs[m]; |
842 |
v = (unsigned long)tb->tc_ptr; |
843 |
if (v == tc_ptr)
|
844 |
return tb;
|
845 |
else if (tc_ptr < v) { |
846 |
m_max = m - 1;
|
847 |
} else {
|
848 |
m_min = m + 1;
|
849 |
} |
850 |
} |
851 |
return &tbs[m_max];
|
852 |
} |
853 |
|
854 |
static void tb_reset_jump_recursive(TranslationBlock *tb); |
855 |
|
856 |
static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) |
857 |
{ |
858 |
TranslationBlock *tb1, *tb_next, **ptb; |
859 |
unsigned int n1; |
860 |
|
861 |
tb1 = tb->jmp_next[n]; |
862 |
if (tb1 != NULL) { |
863 |
/* find head of list */
|
864 |
for(;;) {
|
865 |
n1 = (long)tb1 & 3; |
866 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
867 |
if (n1 == 2) |
868 |
break;
|
869 |
tb1 = tb1->jmp_next[n1]; |
870 |
} |
871 |
/* we are now sure now that tb jumps to tb1 */
|
872 |
tb_next = tb1; |
873 |
|
874 |
/* remove tb from the jmp_first list */
|
875 |
ptb = &tb_next->jmp_first; |
876 |
for(;;) {
|
877 |
tb1 = *ptb; |
878 |
n1 = (long)tb1 & 3; |
879 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
880 |
if (n1 == n && tb1 == tb)
|
881 |
break;
|
882 |
ptb = &tb1->jmp_next[n1]; |
883 |
} |
884 |
*ptb = tb->jmp_next[n]; |
885 |
tb->jmp_next[n] = NULL;
|
886 |
|
887 |
/* suppress the jump to next tb in generated code */
|
888 |
tb_reset_jump(tb, n); |
889 |
|
890 |
/* suppress jumps in the tb on which we could have jumped */
|
891 |
tb_reset_jump_recursive(tb_next); |
892 |
} |
893 |
} |
894 |
|
895 |
static void tb_reset_jump_recursive(TranslationBlock *tb) |
896 |
{ |
897 |
tb_reset_jump_recursive2(tb, 0);
|
898 |
tb_reset_jump_recursive2(tb, 1);
|
899 |
} |
900 |
|
901 |
/* add a breakpoint. EXCP_DEBUG is returned by the CPU loop if a
|
902 |
breakpoint is reached */
|
903 |
int cpu_breakpoint_insert(CPUState *env, uint32_t pc)
|
904 |
{ |
905 |
#if defined(TARGET_I386)
|
906 |
int i;
|
907 |
|
908 |
for(i = 0; i < env->nb_breakpoints; i++) { |
909 |
if (env->breakpoints[i] == pc)
|
910 |
return 0; |
911 |
} |
912 |
|
913 |
if (env->nb_breakpoints >= MAX_BREAKPOINTS)
|
914 |
return -1; |
915 |
env->breakpoints[env->nb_breakpoints++] = pc; |
916 |
tb_invalidate_page_range(pc, pc + 1);
|
917 |
return 0; |
918 |
#else
|
919 |
return -1; |
920 |
#endif
|
921 |
} |
922 |
|
923 |
/* remove a breakpoint */
|
924 |
int cpu_breakpoint_remove(CPUState *env, uint32_t pc)
|
925 |
{ |
926 |
#if defined(TARGET_I386)
|
927 |
int i;
|
928 |
for(i = 0; i < env->nb_breakpoints; i++) { |
929 |
if (env->breakpoints[i] == pc)
|
930 |
goto found;
|
931 |
} |
932 |
return -1; |
933 |
found:
|
934 |
memmove(&env->breakpoints[i], &env->breakpoints[i + 1],
|
935 |
(env->nb_breakpoints - (i + 1)) * sizeof(env->breakpoints[0])); |
936 |
env->nb_breakpoints--; |
937 |
tb_invalidate_page_range(pc, pc + 1);
|
938 |
return 0; |
939 |
#else
|
940 |
return -1; |
941 |
#endif
|
942 |
} |
943 |
|
944 |
/* enable or disable single step mode. EXCP_DEBUG is returned by the
|
945 |
CPU loop after each instruction */
|
946 |
void cpu_single_step(CPUState *env, int enabled) |
947 |
{ |
948 |
#if defined(TARGET_I386)
|
949 |
if (env->singlestep_enabled != enabled) {
|
950 |
env->singlestep_enabled = enabled; |
951 |
/* must flush all the translated code to avoid inconsistancies */
|
952 |
/* XXX: only flush what is necessary */
|
953 |
tb_flush(env); |
954 |
} |
955 |
#endif
|
956 |
} |
957 |
|
958 |
/* enable or disable low levels log */
|
959 |
void cpu_set_log(int log_flags) |
960 |
{ |
961 |
loglevel = log_flags; |
962 |
if (loglevel && !logfile) {
|
963 |
logfile = fopen(logfilename, "w");
|
964 |
if (!logfile) {
|
965 |
perror(logfilename); |
966 |
_exit(1);
|
967 |
} |
968 |
#if !defined(CONFIG_SOFTMMU)
|
969 |
/* must avoid mmap() usage of glibc by setting a buffer "by hand" */
|
970 |
{ |
971 |
static uint8_t logfile_buf[4096]; |
972 |
setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
|
973 |
} |
974 |
#else
|
975 |
setvbuf(logfile, NULL, _IOLBF, 0); |
976 |
#endif
|
977 |
} |
978 |
} |
979 |
|
980 |
void cpu_set_log_filename(const char *filename) |
981 |
{ |
982 |
logfilename = strdup(filename); |
983 |
} |
984 |
|
985 |
/* mask must never be zero, except for A20 change call */
|
986 |
void cpu_interrupt(CPUState *env, int mask) |
987 |
{ |
988 |
TranslationBlock *tb; |
989 |
static int interrupt_lock; |
990 |
|
991 |
env->interrupt_request |= mask; |
992 |
/* if the cpu is currently executing code, we must unlink it and
|
993 |
all the potentially executing TB */
|
994 |
tb = env->current_tb; |
995 |
if (tb && !testandset(&interrupt_lock)) {
|
996 |
env->current_tb = NULL;
|
997 |
tb_reset_jump_recursive(tb); |
998 |
interrupt_lock = 0;
|
999 |
} |
1000 |
} |
1001 |
|
1002 |
|
1003 |
void cpu_abort(CPUState *env, const char *fmt, ...) |
1004 |
{ |
1005 |
va_list ap; |
1006 |
|
1007 |
va_start(ap, fmt); |
1008 |
fprintf(stderr, "qemu: fatal: ");
|
1009 |
vfprintf(stderr, fmt, ap); |
1010 |
fprintf(stderr, "\n");
|
1011 |
#ifdef TARGET_I386
|
1012 |
cpu_x86_dump_state(env, stderr, X86_DUMP_FPU | X86_DUMP_CCOP); |
1013 |
#endif
|
1014 |
va_end(ap); |
1015 |
abort(); |
1016 |
} |
1017 |
|
1018 |
#if !defined(CONFIG_USER_ONLY)
|
1019 |
|
1020 |
/* NOTE: if flush_global is true, also flush global entries (not
|
1021 |
implemented yet) */
|
1022 |
void tlb_flush(CPUState *env, int flush_global) |
1023 |
{ |
1024 |
int i;
|
1025 |
|
1026 |
#if defined(DEBUG_TLB)
|
1027 |
printf("tlb_flush:\n");
|
1028 |
#endif
|
1029 |
/* must reset current TB so that interrupts cannot modify the
|
1030 |
links while we are modifying them */
|
1031 |
env->current_tb = NULL;
|
1032 |
|
1033 |
for(i = 0; i < CPU_TLB_SIZE; i++) { |
1034 |
env->tlb_read[0][i].address = -1; |
1035 |
env->tlb_write[0][i].address = -1; |
1036 |
env->tlb_read[1][i].address = -1; |
1037 |
env->tlb_write[1][i].address = -1; |
1038 |
} |
1039 |
|
1040 |
virt_page_flush(); |
1041 |
for(i = 0;i < CODE_GEN_HASH_SIZE; i++) |
1042 |
tb_hash[i] = NULL;
|
1043 |
|
1044 |
#if !defined(CONFIG_SOFTMMU)
|
1045 |
munmap((void *)MMAP_AREA_START, MMAP_AREA_END - MMAP_AREA_START);
|
1046 |
#endif
|
1047 |
} |
1048 |
|
1049 |
static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, uint32_t addr) |
1050 |
{ |
1051 |
if (addr == (tlb_entry->address &
|
1052 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK))) |
1053 |
tlb_entry->address = -1;
|
1054 |
} |
1055 |
|
1056 |
void tlb_flush_page(CPUState *env, uint32_t addr)
|
1057 |
{ |
1058 |
int i, n;
|
1059 |
VirtPageDesc *vp; |
1060 |
PageDesc *p; |
1061 |
TranslationBlock *tb; |
1062 |
|
1063 |
#if defined(DEBUG_TLB)
|
1064 |
printf("tlb_flush_page: 0x%08x\n", addr);
|
1065 |
#endif
|
1066 |
/* must reset current TB so that interrupts cannot modify the
|
1067 |
links while we are modifying them */
|
1068 |
env->current_tb = NULL;
|
1069 |
|
1070 |
addr &= TARGET_PAGE_MASK; |
1071 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1072 |
tlb_flush_entry(&env->tlb_read[0][i], addr);
|
1073 |
tlb_flush_entry(&env->tlb_write[0][i], addr);
|
1074 |
tlb_flush_entry(&env->tlb_read[1][i], addr);
|
1075 |
tlb_flush_entry(&env->tlb_write[1][i], addr);
|
1076 |
|
1077 |
/* remove from the virtual pc hash table all the TB at this
|
1078 |
virtual address */
|
1079 |
|
1080 |
vp = virt_page_find(addr >> TARGET_PAGE_BITS); |
1081 |
if (vp && vp->valid_tag == virt_valid_tag) {
|
1082 |
p = page_find(vp->phys_addr >> TARGET_PAGE_BITS); |
1083 |
if (p) {
|
1084 |
/* we remove all the links to the TBs in this virtual page */
|
1085 |
tb = p->first_tb; |
1086 |
while (tb != NULL) { |
1087 |
n = (long)tb & 3; |
1088 |
tb = (TranslationBlock *)((long)tb & ~3); |
1089 |
if ((tb->pc & TARGET_PAGE_MASK) == addr ||
|
1090 |
((tb->pc + tb->size - 1) & TARGET_PAGE_MASK) == addr) {
|
1091 |
tb_invalidate(tb); |
1092 |
} |
1093 |
tb = tb->page_next[n]; |
1094 |
} |
1095 |
} |
1096 |
vp->valid_tag = 0;
|
1097 |
} |
1098 |
|
1099 |
#if !defined(CONFIG_SOFTMMU)
|
1100 |
if (addr < MMAP_AREA_END)
|
1101 |
munmap((void *)addr, TARGET_PAGE_SIZE);
|
1102 |
#endif
|
1103 |
} |
1104 |
|
1105 |
static inline void tlb_protect_code1(CPUTLBEntry *tlb_entry, uint32_t addr) |
1106 |
{ |
1107 |
if (addr == (tlb_entry->address &
|
1108 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) && |
1109 |
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_CODE && |
1110 |
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_ROM) { |
1111 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_CODE; |
1112 |
} |
1113 |
} |
1114 |
|
1115 |
/* update the TLBs so that writes to code in the virtual page 'addr'
|
1116 |
can be detected */
|
1117 |
static void tlb_protect_code(CPUState *env, uint32_t addr) |
1118 |
{ |
1119 |
int i;
|
1120 |
|
1121 |
addr &= TARGET_PAGE_MASK; |
1122 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1123 |
tlb_protect_code1(&env->tlb_write[0][i], addr);
|
1124 |
tlb_protect_code1(&env->tlb_write[1][i], addr);
|
1125 |
#if !defined(CONFIG_SOFTMMU)
|
1126 |
/* NOTE: as we generated the code for this page, it is already at
|
1127 |
least readable */
|
1128 |
if (addr < MMAP_AREA_END)
|
1129 |
mprotect((void *)addr, TARGET_PAGE_SIZE, PROT_READ);
|
1130 |
#endif
|
1131 |
} |
1132 |
|
1133 |
static inline void tlb_unprotect_code1(CPUTLBEntry *tlb_entry, uint32_t addr) |
1134 |
{ |
1135 |
if (addr == (tlb_entry->address &
|
1136 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) && |
1137 |
(tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE) { |
1138 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY; |
1139 |
} |
1140 |
} |
1141 |
|
1142 |
/* update the TLB so that writes in virtual page 'addr' are no longer
|
1143 |
tested self modifying code */
|
1144 |
static void tlb_unprotect_code(CPUState *env, uint32_t addr) |
1145 |
{ |
1146 |
int i;
|
1147 |
|
1148 |
addr &= TARGET_PAGE_MASK; |
1149 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1150 |
tlb_unprotect_code1(&env->tlb_write[0][i], addr);
|
1151 |
tlb_unprotect_code1(&env->tlb_write[1][i], addr);
|
1152 |
} |
1153 |
|
1154 |
static inline void tlb_unprotect_code2(CPUTLBEntry *tlb_entry, |
1155 |
uint32_t phys_addr) |
1156 |
{ |
1157 |
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE &&
|
1158 |
((tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend) == phys_addr) { |
1159 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY; |
1160 |
} |
1161 |
} |
1162 |
|
1163 |
/* update the TLB so that writes in physical page 'phys_addr' are no longer
|
1164 |
tested self modifying code */
|
1165 |
static void tlb_unprotect_code_phys(CPUState *env, uint32_t phys_addr, target_ulong vaddr) |
1166 |
{ |
1167 |
int i;
|
1168 |
|
1169 |
phys_addr &= TARGET_PAGE_MASK; |
1170 |
phys_addr += (long)phys_ram_base;
|
1171 |
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1172 |
tlb_unprotect_code2(&env->tlb_write[0][i], phys_addr);
|
1173 |
tlb_unprotect_code2(&env->tlb_write[1][i], phys_addr);
|
1174 |
} |
1175 |
|
1176 |
static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry, |
1177 |
unsigned long start, unsigned long length) |
1178 |
{ |
1179 |
unsigned long addr; |
1180 |
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
|
1181 |
addr = (tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend; |
1182 |
if ((addr - start) < length) {
|
1183 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY; |
1184 |
} |
1185 |
} |
1186 |
} |
1187 |
|
1188 |
void cpu_physical_memory_reset_dirty(target_ulong start, target_ulong end)
|
1189 |
{ |
1190 |
CPUState *env; |
1191 |
target_ulong length, start1; |
1192 |
int i;
|
1193 |
|
1194 |
start &= TARGET_PAGE_MASK; |
1195 |
end = TARGET_PAGE_ALIGN(end); |
1196 |
|
1197 |
length = end - start; |
1198 |
if (length == 0) |
1199 |
return;
|
1200 |
memset(phys_ram_dirty + (start >> TARGET_PAGE_BITS), 0, length >> TARGET_PAGE_BITS);
|
1201 |
|
1202 |
env = cpu_single_env; |
1203 |
/* we modify the TLB cache so that the dirty bit will be set again
|
1204 |
when accessing the range */
|
1205 |
start1 = start + (unsigned long)phys_ram_base; |
1206 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
1207 |
tlb_reset_dirty_range(&env->tlb_write[0][i], start1, length);
|
1208 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
1209 |
tlb_reset_dirty_range(&env->tlb_write[1][i], start1, length);
|
1210 |
|
1211 |
#if !defined(CONFIG_SOFTMMU)
|
1212 |
/* XXX: this is expensive */
|
1213 |
{ |
1214 |
VirtPageDesc *p; |
1215 |
int j;
|
1216 |
target_ulong addr; |
1217 |
|
1218 |
for(i = 0; i < L1_SIZE; i++) { |
1219 |
p = l1_virt_map[i]; |
1220 |
if (p) {
|
1221 |
addr = i << (TARGET_PAGE_BITS + L2_BITS); |
1222 |
for(j = 0; j < L2_SIZE; j++) { |
1223 |
if (p->valid_tag == virt_valid_tag &&
|
1224 |
p->phys_addr >= start && p->phys_addr < end && |
1225 |
(p->prot & PROT_WRITE)) { |
1226 |
if (addr < MMAP_AREA_END) {
|
1227 |
mprotect((void *)addr, TARGET_PAGE_SIZE,
|
1228 |
p->prot & ~PROT_WRITE); |
1229 |
} |
1230 |
} |
1231 |
addr += TARGET_PAGE_SIZE; |
1232 |
p++; |
1233 |
} |
1234 |
} |
1235 |
} |
1236 |
} |
1237 |
#endif
|
1238 |
} |
1239 |
|
1240 |
static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, |
1241 |
unsigned long start) |
1242 |
{ |
1243 |
unsigned long addr; |
1244 |
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_NOTDIRTY) {
|
1245 |
addr = (tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend; |
1246 |
if (addr == start) {
|
1247 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_RAM; |
1248 |
} |
1249 |
} |
1250 |
} |
1251 |
|
1252 |
/* update the TLB corresponding to virtual page vaddr and phys addr
|
1253 |
addr so that it is no longer dirty */
|
1254 |
static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr) |
1255 |
{ |
1256 |
CPUState *env = cpu_single_env; |
1257 |
int i;
|
1258 |
|
1259 |
phys_ram_dirty[(addr - (unsigned long)phys_ram_base) >> TARGET_PAGE_BITS] = 1; |
1260 |
|
1261 |
addr &= TARGET_PAGE_MASK; |
1262 |
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1263 |
tlb_set_dirty1(&env->tlb_write[0][i], addr);
|
1264 |
tlb_set_dirty1(&env->tlb_write[1][i], addr);
|
1265 |
} |
1266 |
|
1267 |
/* add a new TLB entry. At most one entry for a given virtual address
|
1268 |
is permitted. Return 0 if OK or 2 if the page could not be mapped
|
1269 |
(can only happen in non SOFTMMU mode for I/O pages or pages
|
1270 |
conflicting with the host address space). */
|
1271 |
int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot, |
1272 |
int is_user, int is_softmmu) |
1273 |
{ |
1274 |
PageDesc *p; |
1275 |
target_ulong pd; |
1276 |
TranslationBlock *first_tb; |
1277 |
unsigned int index; |
1278 |
target_ulong address, addend; |
1279 |
int ret;
|
1280 |
|
1281 |
p = page_find(paddr >> TARGET_PAGE_BITS); |
1282 |
if (!p) {
|
1283 |
pd = IO_MEM_UNASSIGNED; |
1284 |
first_tb = NULL;
|
1285 |
} else {
|
1286 |
pd = p->phys_offset; |
1287 |
first_tb = p->first_tb; |
1288 |
} |
1289 |
#if defined(DEBUG_TLB)
|
1290 |
printf("tlb_set_page: vaddr=0x%08x paddr=0x%08x prot=%x u=%d c=%d smmu=%d pd=0x%08x\n",
|
1291 |
vaddr, paddr, prot, is_user, (first_tb != NULL), is_softmmu, pd);
|
1292 |
#endif
|
1293 |
|
1294 |
ret = 0;
|
1295 |
#if !defined(CONFIG_SOFTMMU)
|
1296 |
if (is_softmmu)
|
1297 |
#endif
|
1298 |
{ |
1299 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
|
1300 |
/* IO memory case */
|
1301 |
address = vaddr | pd; |
1302 |
addend = paddr; |
1303 |
} else {
|
1304 |
/* standard memory */
|
1305 |
address = vaddr; |
1306 |
addend = (unsigned long)phys_ram_base + (pd & TARGET_PAGE_MASK); |
1307 |
} |
1308 |
|
1309 |
index = (vaddr >> 12) & (CPU_TLB_SIZE - 1); |
1310 |
addend -= vaddr; |
1311 |
if (prot & PROT_READ) {
|
1312 |
env->tlb_read[is_user][index].address = address; |
1313 |
env->tlb_read[is_user][index].addend = addend; |
1314 |
} else {
|
1315 |
env->tlb_read[is_user][index].address = -1;
|
1316 |
env->tlb_read[is_user][index].addend = -1;
|
1317 |
} |
1318 |
if (prot & PROT_WRITE) {
|
1319 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM) {
|
1320 |
/* ROM: access is ignored (same as unassigned) */
|
1321 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_ROM; |
1322 |
env->tlb_write[is_user][index].addend = addend; |
1323 |
} else if (first_tb) { |
1324 |
/* if code is present, we use a specific memory
|
1325 |
handler. It works only for physical memory access */
|
1326 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_CODE; |
1327 |
env->tlb_write[is_user][index].addend = addend; |
1328 |
} else if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM && |
1329 |
!cpu_physical_memory_is_dirty(pd)) { |
1330 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_NOTDIRTY; |
1331 |
env->tlb_write[is_user][index].addend = addend; |
1332 |
} else {
|
1333 |
env->tlb_write[is_user][index].address = address; |
1334 |
env->tlb_write[is_user][index].addend = addend; |
1335 |
} |
1336 |
} else {
|
1337 |
env->tlb_write[is_user][index].address = -1;
|
1338 |
env->tlb_write[is_user][index].addend = -1;
|
1339 |
} |
1340 |
} |
1341 |
#if !defined(CONFIG_SOFTMMU)
|
1342 |
else {
|
1343 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
|
1344 |
/* IO access: no mapping is done as it will be handled by the
|
1345 |
soft MMU */
|
1346 |
if (!(env->hflags & HF_SOFTMMU_MASK))
|
1347 |
ret = 2;
|
1348 |
} else {
|
1349 |
void *map_addr;
|
1350 |
|
1351 |
if (vaddr >= MMAP_AREA_END) {
|
1352 |
ret = 2;
|
1353 |
} else {
|
1354 |
if (prot & PROT_WRITE) {
|
1355 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM ||
|
1356 |
first_tb || |
1357 |
((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM && |
1358 |
!cpu_physical_memory_is_dirty(pd))) { |
1359 |
/* ROM: we do as if code was inside */
|
1360 |
/* if code is present, we only map as read only and save the
|
1361 |
original mapping */
|
1362 |
VirtPageDesc *vp; |
1363 |
|
1364 |
vp = virt_page_find_alloc(vaddr >> TARGET_PAGE_BITS); |
1365 |
vp->phys_addr = pd; |
1366 |
vp->prot = prot; |
1367 |
vp->valid_tag = virt_valid_tag; |
1368 |
prot &= ~PAGE_WRITE; |
1369 |
} |
1370 |
} |
1371 |
map_addr = mmap((void *)vaddr, TARGET_PAGE_SIZE, prot,
|
1372 |
MAP_SHARED | MAP_FIXED, phys_ram_fd, (pd & TARGET_PAGE_MASK)); |
1373 |
if (map_addr == MAP_FAILED) {
|
1374 |
cpu_abort(env, "mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
|
1375 |
paddr, vaddr); |
1376 |
} |
1377 |
} |
1378 |
} |
1379 |
} |
1380 |
#endif
|
1381 |
return ret;
|
1382 |
} |
1383 |
|
1384 |
/* called from signal handler: invalidate the code and unprotect the
|
1385 |
page. Return TRUE if the fault was succesfully handled. */
|
1386 |
int page_unprotect(unsigned long addr) |
1387 |
{ |
1388 |
#if !defined(CONFIG_SOFTMMU)
|
1389 |
VirtPageDesc *vp; |
1390 |
|
1391 |
#if defined(DEBUG_TLB)
|
1392 |
printf("page_unprotect: addr=0x%08x\n", addr);
|
1393 |
#endif
|
1394 |
addr &= TARGET_PAGE_MASK; |
1395 |
|
1396 |
/* if it is not mapped, no need to worry here */
|
1397 |
if (addr >= MMAP_AREA_END)
|
1398 |
return 0; |
1399 |
vp = virt_page_find(addr >> TARGET_PAGE_BITS); |
1400 |
if (!vp)
|
1401 |
return 0; |
1402 |
/* NOTE: in this case, validate_tag is _not_ tested as it
|
1403 |
validates only the code TLB */
|
1404 |
if (vp->valid_tag != virt_valid_tag)
|
1405 |
return 0; |
1406 |
if (!(vp->prot & PAGE_WRITE))
|
1407 |
return 0; |
1408 |
#if defined(DEBUG_TLB)
|
1409 |
printf("page_unprotect: addr=0x%08x phys_addr=0x%08x prot=%x\n",
|
1410 |
addr, vp->phys_addr, vp->prot); |
1411 |
#endif
|
1412 |
/* set the dirty bit */
|
1413 |
phys_ram_dirty[vp->phys_addr >> TARGET_PAGE_BITS] = 1;
|
1414 |
/* flush the code inside */
|
1415 |
tb_invalidate_phys_page(vp->phys_addr); |
1416 |
if (mprotect((void *)addr, TARGET_PAGE_SIZE, vp->prot) < 0) |
1417 |
cpu_abort(cpu_single_env, "error mprotect addr=0x%lx prot=%d\n",
|
1418 |
(unsigned long)addr, vp->prot); |
1419 |
return 1; |
1420 |
#else
|
1421 |
return 0; |
1422 |
#endif
|
1423 |
} |
1424 |
|
1425 |
#else
|
1426 |
|
1427 |
void tlb_flush(CPUState *env, int flush_global) |
1428 |
{ |
1429 |
} |
1430 |
|
1431 |
void tlb_flush_page(CPUState *env, uint32_t addr)
|
1432 |
{ |
1433 |
} |
1434 |
|
1435 |
void tlb_flush_page_write(CPUState *env, uint32_t addr)
|
1436 |
{ |
1437 |
} |
1438 |
|
1439 |
int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot, |
1440 |
int is_user, int is_softmmu) |
1441 |
{ |
1442 |
return 0; |
1443 |
} |
1444 |
|
1445 |
/* dump memory mappings */
|
1446 |
void page_dump(FILE *f)
|
1447 |
{ |
1448 |
unsigned long start, end; |
1449 |
int i, j, prot, prot1;
|
1450 |
PageDesc *p; |
1451 |
|
1452 |
fprintf(f, "%-8s %-8s %-8s %s\n",
|
1453 |
"start", "end", "size", "prot"); |
1454 |
start = -1;
|
1455 |
end = -1;
|
1456 |
prot = 0;
|
1457 |
for(i = 0; i <= L1_SIZE; i++) { |
1458 |
if (i < L1_SIZE)
|
1459 |
p = l1_map[i]; |
1460 |
else
|
1461 |
p = NULL;
|
1462 |
for(j = 0;j < L2_SIZE; j++) { |
1463 |
if (!p)
|
1464 |
prot1 = 0;
|
1465 |
else
|
1466 |
prot1 = p[j].flags; |
1467 |
if (prot1 != prot) {
|
1468 |
end = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS);
|
1469 |
if (start != -1) { |
1470 |
fprintf(f, "%08lx-%08lx %08lx %c%c%c\n",
|
1471 |
start, end, end - start, |
1472 |
prot & PAGE_READ ? 'r' : '-', |
1473 |
prot & PAGE_WRITE ? 'w' : '-', |
1474 |
prot & PAGE_EXEC ? 'x' : '-'); |
1475 |
} |
1476 |
if (prot1 != 0) |
1477 |
start = end; |
1478 |
else
|
1479 |
start = -1;
|
1480 |
prot = prot1; |
1481 |
} |
1482 |
if (!p)
|
1483 |
break;
|
1484 |
} |
1485 |
} |
1486 |
} |
1487 |
|
1488 |
int page_get_flags(unsigned long address) |
1489 |
{ |
1490 |
PageDesc *p; |
1491 |
|
1492 |
p = page_find(address >> TARGET_PAGE_BITS); |
1493 |
if (!p)
|
1494 |
return 0; |
1495 |
return p->flags;
|
1496 |
} |
1497 |
|
1498 |
/* modify the flags of a page and invalidate the code if
|
1499 |
necessary. The flag PAGE_WRITE_ORG is positionned automatically
|
1500 |
depending on PAGE_WRITE */
|
1501 |
void page_set_flags(unsigned long start, unsigned long end, int flags) |
1502 |
{ |
1503 |
PageDesc *p; |
1504 |
unsigned long addr; |
1505 |
|
1506 |
start = start & TARGET_PAGE_MASK; |
1507 |
end = TARGET_PAGE_ALIGN(end); |
1508 |
if (flags & PAGE_WRITE)
|
1509 |
flags |= PAGE_WRITE_ORG; |
1510 |
spin_lock(&tb_lock); |
1511 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
1512 |
p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
1513 |
/* if the write protection is set, then we invalidate the code
|
1514 |
inside */
|
1515 |
if (!(p->flags & PAGE_WRITE) &&
|
1516 |
(flags & PAGE_WRITE) && |
1517 |
p->first_tb) { |
1518 |
tb_invalidate_phys_page(addr); |
1519 |
} |
1520 |
p->flags = flags; |
1521 |
} |
1522 |
spin_unlock(&tb_lock); |
1523 |
} |
1524 |
|
1525 |
/* called from signal handler: invalidate the code and unprotect the
|
1526 |
page. Return TRUE if the fault was succesfully handled. */
|
1527 |
int page_unprotect(unsigned long address) |
1528 |
{ |
1529 |
unsigned int page_index, prot, pindex; |
1530 |
PageDesc *p, *p1; |
1531 |
unsigned long host_start, host_end, addr; |
1532 |
|
1533 |
host_start = address & host_page_mask; |
1534 |
page_index = host_start >> TARGET_PAGE_BITS; |
1535 |
p1 = page_find(page_index); |
1536 |
if (!p1)
|
1537 |
return 0; |
1538 |
host_end = host_start + host_page_size; |
1539 |
p = p1; |
1540 |
prot = 0;
|
1541 |
for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) {
|
1542 |
prot |= p->flags; |
1543 |
p++; |
1544 |
} |
1545 |
/* if the page was really writable, then we change its
|
1546 |
protection back to writable */
|
1547 |
if (prot & PAGE_WRITE_ORG) {
|
1548 |
pindex = (address - host_start) >> TARGET_PAGE_BITS; |
1549 |
if (!(p1[pindex].flags & PAGE_WRITE)) {
|
1550 |
mprotect((void *)host_start, host_page_size,
|
1551 |
(prot & PAGE_BITS) | PAGE_WRITE); |
1552 |
p1[pindex].flags |= PAGE_WRITE; |
1553 |
/* and since the content will be modified, we must invalidate
|
1554 |
the corresponding translated code. */
|
1555 |
tb_invalidate_phys_page(address); |
1556 |
#ifdef DEBUG_TB_CHECK
|
1557 |
tb_invalidate_check(address); |
1558 |
#endif
|
1559 |
return 1; |
1560 |
} |
1561 |
} |
1562 |
return 0; |
1563 |
} |
1564 |
|
1565 |
/* call this function when system calls directly modify a memory area */
|
1566 |
void page_unprotect_range(uint8_t *data, unsigned long data_size) |
1567 |
{ |
1568 |
unsigned long start, end, addr; |
1569 |
|
1570 |
start = (unsigned long)data; |
1571 |
end = start + data_size; |
1572 |
start &= TARGET_PAGE_MASK; |
1573 |
end = TARGET_PAGE_ALIGN(end); |
1574 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
1575 |
page_unprotect(addr); |
1576 |
} |
1577 |
} |
1578 |
|
1579 |
static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr) |
1580 |
{ |
1581 |
} |
1582 |
|
1583 |
#endif /* defined(CONFIG_USER_ONLY) */ |
1584 |
|
1585 |
/* register physical memory. 'size' must be a multiple of the target
|
1586 |
page size. If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
|
1587 |
io memory page */
|
1588 |
void cpu_register_physical_memory(unsigned long start_addr, unsigned long size, |
1589 |
long phys_offset)
|
1590 |
{ |
1591 |
unsigned long addr, end_addr; |
1592 |
PageDesc *p; |
1593 |
|
1594 |
end_addr = start_addr + size; |
1595 |
for(addr = start_addr; addr < end_addr; addr += TARGET_PAGE_SIZE) {
|
1596 |
p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
1597 |
p->phys_offset = phys_offset; |
1598 |
if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM)
|
1599 |
phys_offset += TARGET_PAGE_SIZE; |
1600 |
} |
1601 |
} |
1602 |
|
1603 |
static uint32_t unassigned_mem_readb(uint32_t addr)
|
1604 |
{ |
1605 |
return 0; |
1606 |
} |
1607 |
|
1608 |
static void unassigned_mem_writeb(uint32_t addr, uint32_t val, uint32_t vaddr) |
1609 |
{ |
1610 |
} |
1611 |
|
1612 |
static CPUReadMemoryFunc *unassigned_mem_read[3] = { |
1613 |
unassigned_mem_readb, |
1614 |
unassigned_mem_readb, |
1615 |
unassigned_mem_readb, |
1616 |
}; |
1617 |
|
1618 |
static CPUWriteMemoryFunc *unassigned_mem_write[3] = { |
1619 |
unassigned_mem_writeb, |
1620 |
unassigned_mem_writeb, |
1621 |
unassigned_mem_writeb, |
1622 |
}; |
1623 |
|
1624 |
/* self modifying code support in soft mmu mode : writing to a page
|
1625 |
containing code comes to these functions */
|
1626 |
|
1627 |
static void code_mem_writeb(uint32_t addr, uint32_t val, uint32_t vaddr) |
1628 |
{ |
1629 |
unsigned long phys_addr; |
1630 |
|
1631 |
phys_addr = addr - (long)phys_ram_base;
|
1632 |
#if !defined(CONFIG_USER_ONLY)
|
1633 |
tb_invalidate_phys_page_fast(phys_addr, 1, vaddr);
|
1634 |
#endif
|
1635 |
stb_raw((uint8_t *)addr, val); |
1636 |
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
1637 |
} |
1638 |
|
1639 |
static void code_mem_writew(uint32_t addr, uint32_t val, uint32_t vaddr) |
1640 |
{ |
1641 |
unsigned long phys_addr; |
1642 |
|
1643 |
phys_addr = addr - (long)phys_ram_base;
|
1644 |
#if !defined(CONFIG_USER_ONLY)
|
1645 |
tb_invalidate_phys_page_fast(phys_addr, 2, vaddr);
|
1646 |
#endif
|
1647 |
stw_raw((uint8_t *)addr, val); |
1648 |
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
1649 |
} |
1650 |
|
1651 |
static void code_mem_writel(uint32_t addr, uint32_t val, uint32_t vaddr) |
1652 |
{ |
1653 |
unsigned long phys_addr; |
1654 |
|
1655 |
phys_addr = addr - (long)phys_ram_base;
|
1656 |
#if !defined(CONFIG_USER_ONLY)
|
1657 |
tb_invalidate_phys_page_fast(phys_addr, 4, vaddr);
|
1658 |
#endif
|
1659 |
stl_raw((uint8_t *)addr, val); |
1660 |
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
1661 |
} |
1662 |
|
1663 |
static CPUReadMemoryFunc *code_mem_read[3] = { |
1664 |
NULL, /* never used */ |
1665 |
NULL, /* never used */ |
1666 |
NULL, /* never used */ |
1667 |
}; |
1668 |
|
1669 |
static CPUWriteMemoryFunc *code_mem_write[3] = { |
1670 |
code_mem_writeb, |
1671 |
code_mem_writew, |
1672 |
code_mem_writel, |
1673 |
}; |
1674 |
|
1675 |
static void notdirty_mem_writeb(uint32_t addr, uint32_t val, uint32_t vaddr) |
1676 |
{ |
1677 |
stb_raw((uint8_t *)addr, val); |
1678 |
tlb_set_dirty(addr, vaddr); |
1679 |
} |
1680 |
|
1681 |
static void notdirty_mem_writew(uint32_t addr, uint32_t val, uint32_t vaddr) |
1682 |
{ |
1683 |
stw_raw((uint8_t *)addr, val); |
1684 |
tlb_set_dirty(addr, vaddr); |
1685 |
} |
1686 |
|
1687 |
static void notdirty_mem_writel(uint32_t addr, uint32_t val, uint32_t vaddr) |
1688 |
{ |
1689 |
stl_raw((uint8_t *)addr, val); |
1690 |
tlb_set_dirty(addr, vaddr); |
1691 |
} |
1692 |
|
1693 |
static CPUWriteMemoryFunc *notdirty_mem_write[3] = { |
1694 |
notdirty_mem_writeb, |
1695 |
notdirty_mem_writew, |
1696 |
notdirty_mem_writel, |
1697 |
}; |
1698 |
|
1699 |
static void io_mem_init(void) |
1700 |
{ |
1701 |
cpu_register_io_memory(IO_MEM_ROM >> IO_MEM_SHIFT, code_mem_read, unassigned_mem_write); |
1702 |
cpu_register_io_memory(IO_MEM_UNASSIGNED >> IO_MEM_SHIFT, unassigned_mem_read, unassigned_mem_write); |
1703 |
cpu_register_io_memory(IO_MEM_CODE >> IO_MEM_SHIFT, code_mem_read, code_mem_write); |
1704 |
cpu_register_io_memory(IO_MEM_NOTDIRTY >> IO_MEM_SHIFT, code_mem_read, notdirty_mem_write); |
1705 |
io_mem_nb = 5;
|
1706 |
|
1707 |
/* alloc dirty bits array */
|
1708 |
phys_ram_dirty = qemu_malloc(phys_ram_size >> TARGET_PAGE_BITS); |
1709 |
} |
1710 |
|
1711 |
/* mem_read and mem_write are arrays of functions containing the
|
1712 |
function to access byte (index 0), word (index 1) and dword (index
|
1713 |
2). All functions must be supplied. If io_index is non zero, the
|
1714 |
corresponding io zone is modified. If it is zero, a new io zone is
|
1715 |
allocated. The return value can be used with
|
1716 |
cpu_register_physical_memory(). (-1) is returned if error. */
|
1717 |
int cpu_register_io_memory(int io_index, |
1718 |
CPUReadMemoryFunc **mem_read, |
1719 |
CPUWriteMemoryFunc **mem_write) |
1720 |
{ |
1721 |
int i;
|
1722 |
|
1723 |
if (io_index <= 0) { |
1724 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
1725 |
return -1; |
1726 |
io_index = io_mem_nb++; |
1727 |
} else {
|
1728 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
1729 |
return -1; |
1730 |
} |
1731 |
|
1732 |
for(i = 0;i < 3; i++) { |
1733 |
io_mem_read[io_index][i] = mem_read[i]; |
1734 |
io_mem_write[io_index][i] = mem_write[i]; |
1735 |
} |
1736 |
return io_index << IO_MEM_SHIFT;
|
1737 |
} |
1738 |
|
1739 |
/* physical memory access (slow version, mainly for debug) */
|
1740 |
#if defined(CONFIG_USER_ONLY)
|
1741 |
void cpu_physical_memory_rw(CPUState *env, uint8_t *buf, target_ulong addr,
|
1742 |
int len, int is_write) |
1743 |
{ |
1744 |
int l, flags;
|
1745 |
target_ulong page; |
1746 |
|
1747 |
while (len > 0) { |
1748 |
page = addr & TARGET_PAGE_MASK; |
1749 |
l = (page + TARGET_PAGE_SIZE) - addr; |
1750 |
if (l > len)
|
1751 |
l = len; |
1752 |
flags = page_get_flags(page); |
1753 |
if (!(flags & PAGE_VALID))
|
1754 |
return;
|
1755 |
if (is_write) {
|
1756 |
if (!(flags & PAGE_WRITE))
|
1757 |
return;
|
1758 |
memcpy((uint8_t *)addr, buf, len); |
1759 |
} else {
|
1760 |
if (!(flags & PAGE_READ))
|
1761 |
return;
|
1762 |
memcpy(buf, (uint8_t *)addr, len); |
1763 |
} |
1764 |
len -= l; |
1765 |
buf += l; |
1766 |
addr += l; |
1767 |
} |
1768 |
} |
1769 |
#else
|
1770 |
void cpu_physical_memory_rw(CPUState *env, uint8_t *buf, target_ulong addr,
|
1771 |
int len, int is_write) |
1772 |
{ |
1773 |
int l, io_index;
|
1774 |
uint8_t *ptr; |
1775 |
uint32_t val; |
1776 |
target_ulong page, pd; |
1777 |
PageDesc *p; |
1778 |
|
1779 |
while (len > 0) { |
1780 |
page = addr & TARGET_PAGE_MASK; |
1781 |
l = (page + TARGET_PAGE_SIZE) - addr; |
1782 |
if (l > len)
|
1783 |
l = len; |
1784 |
p = page_find(page >> TARGET_PAGE_BITS); |
1785 |
if (!p) {
|
1786 |
pd = IO_MEM_UNASSIGNED; |
1787 |
} else {
|
1788 |
pd = p->phys_offset; |
1789 |
} |
1790 |
|
1791 |
if (is_write) {
|
1792 |
if ((pd & ~TARGET_PAGE_MASK) != 0) { |
1793 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
1794 |
if (l >= 4 && ((addr & 3) == 0)) { |
1795 |
/* 32 bit read access */
|
1796 |
val = ldl_raw(buf); |
1797 |
io_mem_write[io_index][2](addr, val, 0); |
1798 |
l = 4;
|
1799 |
} else if (l >= 2 && ((addr & 1) == 0)) { |
1800 |
/* 16 bit read access */
|
1801 |
val = lduw_raw(buf); |
1802 |
io_mem_write[io_index][1](addr, val, 0); |
1803 |
l = 2;
|
1804 |
} else {
|
1805 |
/* 8 bit access */
|
1806 |
val = ldub_raw(buf); |
1807 |
io_mem_write[io_index][0](addr, val, 0); |
1808 |
l = 1;
|
1809 |
} |
1810 |
} else {
|
1811 |
/* RAM case */
|
1812 |
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) + |
1813 |
(addr & ~TARGET_PAGE_MASK); |
1814 |
memcpy(ptr, buf, l); |
1815 |
} |
1816 |
} else {
|
1817 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
1818 |
(pd & ~TARGET_PAGE_MASK) != IO_MEM_CODE) { |
1819 |
/* I/O case */
|
1820 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
1821 |
if (l >= 4 && ((addr & 3) == 0)) { |
1822 |
/* 32 bit read access */
|
1823 |
val = io_mem_read[io_index][2](addr);
|
1824 |
stl_raw(buf, val); |
1825 |
l = 4;
|
1826 |
} else if (l >= 2 && ((addr & 1) == 0)) { |
1827 |
/* 16 bit read access */
|
1828 |
val = io_mem_read[io_index][1](addr);
|
1829 |
stw_raw(buf, val); |
1830 |
l = 2;
|
1831 |
} else {
|
1832 |
/* 8 bit access */
|
1833 |
val = io_mem_read[io_index][0](addr);
|
1834 |
stb_raw(buf, val); |
1835 |
l = 1;
|
1836 |
} |
1837 |
} else {
|
1838 |
/* RAM case */
|
1839 |
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) + |
1840 |
(addr & ~TARGET_PAGE_MASK); |
1841 |
memcpy(buf, ptr, l); |
1842 |
} |
1843 |
} |
1844 |
len -= l; |
1845 |
buf += l; |
1846 |
addr += l; |
1847 |
} |
1848 |
} |
1849 |
#endif
|
1850 |
|
1851 |
/* virtual memory access for debug */
|
1852 |
int cpu_memory_rw_debug(CPUState *env,
|
1853 |
uint8_t *buf, target_ulong addr, int len, int is_write) |
1854 |
{ |
1855 |
int l;
|
1856 |
target_ulong page, phys_addr; |
1857 |
|
1858 |
while (len > 0) { |
1859 |
page = addr & TARGET_PAGE_MASK; |
1860 |
phys_addr = cpu_get_phys_page_debug(env, page); |
1861 |
/* if no physical page mapped, return an error */
|
1862 |
if (phys_addr == -1) |
1863 |
return -1; |
1864 |
l = (page + TARGET_PAGE_SIZE) - addr; |
1865 |
if (l > len)
|
1866 |
l = len; |
1867 |
cpu_physical_memory_rw(env, buf, |
1868 |
phys_addr + (addr & ~TARGET_PAGE_MASK), l, |
1869 |
is_write); |
1870 |
len -= l; |
1871 |
buf += l; |
1872 |
addr += l; |
1873 |
} |
1874 |
return 0; |
1875 |
} |
1876 |
|
1877 |
#if !defined(CONFIG_USER_ONLY)
|
1878 |
|
1879 |
#define MMUSUFFIX _cmmu
|
1880 |
#define GETPC() NULL |
1881 |
#define env cpu_single_env
|
1882 |
|
1883 |
#define SHIFT 0 |
1884 |
#include "softmmu_template.h" |
1885 |
|
1886 |
#define SHIFT 1 |
1887 |
#include "softmmu_template.h" |
1888 |
|
1889 |
#define SHIFT 2 |
1890 |
#include "softmmu_template.h" |
1891 |
|
1892 |
#define SHIFT 3 |
1893 |
#include "softmmu_template.h" |
1894 |
|
1895 |
#undef env
|
1896 |
|
1897 |
#endif
|