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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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|
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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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|
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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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|
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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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|
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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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|
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#define SMC_BITMAP_USE_THRESHOLD 10 |
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|
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#define MMAP_AREA_START 0x00000000 |
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#define MMAP_AREA_END 0xa8000000 |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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#define L1_SIZE (1 << L1_BITS) |
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#define L2_SIZE (1 << L2_BITS) |
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|
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static void io_mem_init(void); |
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|
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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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|
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static PageDesc *l1_map[L1_SIZE];
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|
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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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|
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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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|
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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 = 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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|
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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); |
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|
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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 = 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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|
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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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|
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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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|
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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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|
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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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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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#ifdef DEBUG_TB_CHECK
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|
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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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|
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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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|
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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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|
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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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|
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/* suppress any remaining jumps to this TB */
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tb1 = tb->jmp_first; |
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for(;;) {
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n1 = (long)tb1 & 3; |
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tb1 = (TranslationBlock *)((long)tb1 & ~3); |
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if (n1 == 2) |
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break;
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tb1 = tb1->jmp_next[n1]; |
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} |
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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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|
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#endif
|
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|
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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; |
| 340 |
for(;;) {
|
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tb1 = *ptb; |
| 342 |
if (tb1 == tb) {
|
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*ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
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break;
|
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} |
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ptb = (TranslationBlock **)((char *)tb1 + next_offset);
|
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} |
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} |
| 349 |
|
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static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) |
| 351 |
{
|
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TranslationBlock *tb1; |
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unsigned int n1; |
| 354 |
|
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for(;;) {
|
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tb1 = *ptb; |
| 357 |
n1 = (long)tb1 & 3; |
| 358 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 359 |
if (tb1 == tb) {
|
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*ptb = tb1->page_next[n1]; |
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break;
|
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} |
| 363 |
ptb = &tb1->page_next[n1]; |
| 364 |
} |
| 365 |
} |
| 366 |
|
| 367 |
static inline void tb_jmp_remove(TranslationBlock *tb, int n) |
| 368 |
{
|
| 369 |
TranslationBlock *tb1, **ptb; |
| 370 |
unsigned int n1; |
| 371 |
|
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ptb = &tb->jmp_next[n]; |
| 373 |
tb1 = *ptb; |
| 374 |
if (tb1) {
|
| 375 |
/* find tb(n) in circular list */
|
| 376 |
for(;;) {
|
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tb1 = *ptb; |
| 378 |
n1 = (long)tb1 & 3; |
| 379 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 380 |
if (n1 == n && tb1 == tb)
|
| 381 |
break;
|
| 382 |
if (n1 == 2) { |
| 383 |
ptb = &tb1->jmp_first; |
| 384 |
} else {
|
| 385 |
ptb = &tb1->jmp_next[n1]; |
| 386 |
} |
| 387 |
} |
| 388 |
/* now we can suppress tb(n) from the list */
|
| 389 |
*ptb = tb->jmp_next[n]; |
| 390 |
|
| 391 |
tb->jmp_next[n] = NULL;
|
| 392 |
} |
| 393 |
} |
| 394 |
|
| 395 |
/* reset the jump entry 'n' of a TB so that it is not chained to
|
| 396 |
another TB */
|
| 397 |
static inline void tb_reset_jump(TranslationBlock *tb, int n) |
| 398 |
{
|
| 399 |
tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); |
| 400 |
} |
| 401 |
|
| 402 |
static inline void tb_invalidate(TranslationBlock *tb) |
| 403 |
{
|
| 404 |
unsigned int h, n1; |
| 405 |
TranslationBlock *tb1, *tb2, **ptb; |
| 406 |
|
| 407 |
tb_invalidated_flag = 1;
|
| 408 |
|
| 409 |
/* remove the TB from the hash list */
|
| 410 |
h = tb_hash_func(tb->pc); |
| 411 |
ptb = &tb_hash[h]; |
| 412 |
for(;;) {
|
| 413 |
tb1 = *ptb; |
| 414 |
/* NOTE: the TB is not necessarily linked in the hash. It
|
| 415 |
indicates that it is not currently used */
|
| 416 |
if (tb1 == NULL) |
| 417 |
return;
|
| 418 |
if (tb1 == tb) {
|
| 419 |
*ptb = tb1->hash_next; |
| 420 |
break;
|
| 421 |
} |
| 422 |
ptb = &tb1->hash_next; |
| 423 |
} |
| 424 |
|
| 425 |
/* suppress this TB from the two jump lists */
|
| 426 |
tb_jmp_remove(tb, 0);
|
| 427 |
tb_jmp_remove(tb, 1);
|
| 428 |
|
| 429 |
/* suppress any remaining jumps to this TB */
|
| 430 |
tb1 = tb->jmp_first; |
| 431 |
for(;;) {
|
| 432 |
n1 = (long)tb1 & 3; |
| 433 |
if (n1 == 2) |
| 434 |
break;
|
| 435 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 436 |
tb2 = tb1->jmp_next[n1]; |
| 437 |
tb_reset_jump(tb1, n1); |
| 438 |
tb1->jmp_next[n1] = NULL;
|
| 439 |
tb1 = tb2; |
| 440 |
} |
| 441 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ |
| 442 |
} |
| 443 |
|
| 444 |
static inline void tb_phys_invalidate(TranslationBlock *tb, unsigned int page_addr) |
| 445 |
{
|
| 446 |
PageDesc *p; |
| 447 |
unsigned int h; |
| 448 |
target_ulong phys_pc; |
| 449 |
|
| 450 |
/* remove the TB from the hash list */
|
| 451 |
phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
| 452 |
h = tb_phys_hash_func(phys_pc); |
| 453 |
tb_remove(&tb_phys_hash[h], tb, |
| 454 |
offsetof(TranslationBlock, phys_hash_next)); |
| 455 |
|
| 456 |
/* remove the TB from the page list */
|
| 457 |
if (tb->page_addr[0] != page_addr) { |
| 458 |
p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
|
| 459 |
tb_page_remove(&p->first_tb, tb); |
| 460 |
invalidate_page_bitmap(p); |
| 461 |
} |
| 462 |
if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { |
| 463 |
p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
|
| 464 |
tb_page_remove(&p->first_tb, tb); |
| 465 |
invalidate_page_bitmap(p); |
| 466 |
} |
| 467 |
|
| 468 |
tb_invalidate(tb); |
| 469 |
} |
| 470 |
|
| 471 |
static inline void set_bits(uint8_t *tab, int start, int len) |
| 472 |
{
|
| 473 |
int end, mask, end1;
|
| 474 |
|
| 475 |
end = start + len; |
| 476 |
tab += start >> 3;
|
| 477 |
mask = 0xff << (start & 7); |
| 478 |
if ((start & ~7) == (end & ~7)) { |
| 479 |
if (start < end) {
|
| 480 |
mask &= ~(0xff << (end & 7)); |
| 481 |
*tab |= mask; |
| 482 |
} |
| 483 |
} else {
|
| 484 |
*tab++ |= mask; |
| 485 |
start = (start + 8) & ~7; |
| 486 |
end1 = end & ~7;
|
| 487 |
while (start < end1) {
|
| 488 |
*tab++ = 0xff;
|
| 489 |
start += 8;
|
| 490 |
} |
| 491 |
if (start < end) {
|
| 492 |
mask = ~(0xff << (end & 7)); |
| 493 |
*tab |= mask; |
| 494 |
} |
| 495 |
} |
| 496 |
} |
| 497 |
|
| 498 |
static void build_page_bitmap(PageDesc *p) |
| 499 |
{
|
| 500 |
int n, tb_start, tb_end;
|
| 501 |
TranslationBlock *tb; |
| 502 |
|
| 503 |
p->code_bitmap = malloc(TARGET_PAGE_SIZE / 8);
|
| 504 |
if (!p->code_bitmap)
|
| 505 |
return;
|
| 506 |
memset(p->code_bitmap, 0, TARGET_PAGE_SIZE / 8); |
| 507 |
|
| 508 |
tb = p->first_tb; |
| 509 |
while (tb != NULL) { |
| 510 |
n = (long)tb & 3; |
| 511 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 512 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
| 513 |
if (n == 0) { |
| 514 |
/* NOTE: tb_end may be after the end of the page, but
|
| 515 |
it is not a problem */
|
| 516 |
tb_start = tb->pc & ~TARGET_PAGE_MASK; |
| 517 |
tb_end = tb_start + tb->size; |
| 518 |
if (tb_end > TARGET_PAGE_SIZE)
|
| 519 |
tb_end = TARGET_PAGE_SIZE; |
| 520 |
} else {
|
| 521 |
tb_start = 0;
|
| 522 |
tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| 523 |
} |
| 524 |
set_bits(p->code_bitmap, tb_start, tb_end - tb_start); |
| 525 |
tb = tb->page_next[n]; |
| 526 |
} |
| 527 |
} |
| 528 |
|
| 529 |
/* invalidate all TBs which intersect with the target physical page
|
| 530 |
starting in range [start;end[. NOTE: start and end must refer to
|
| 531 |
the same physical page */
|
| 532 |
static void tb_invalidate_phys_page_range(target_ulong start, target_ulong end) |
| 533 |
{
|
| 534 |
int n;
|
| 535 |
PageDesc *p; |
| 536 |
TranslationBlock *tb, *tb_next; |
| 537 |
target_ulong tb_start, tb_end; |
| 538 |
|
| 539 |
p = page_find(start >> TARGET_PAGE_BITS); |
| 540 |
if (!p)
|
| 541 |
return;
|
| 542 |
if (!p->code_bitmap &&
|
| 543 |
++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD) {
|
| 544 |
/* build code bitmap */
|
| 545 |
build_page_bitmap(p); |
| 546 |
} |
| 547 |
|
| 548 |
/* we remove all the TBs in the range [start, end[ */
|
| 549 |
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
| 550 |
tb = p->first_tb; |
| 551 |
while (tb != NULL) { |
| 552 |
n = (long)tb & 3; |
| 553 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 554 |
tb_next = tb->page_next[n]; |
| 555 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
| 556 |
if (n == 0) { |
| 557 |
/* NOTE: tb_end may be after the end of the page, but
|
| 558 |
it is not a problem */
|
| 559 |
tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
| 560 |
tb_end = tb_start + tb->size; |
| 561 |
} else {
|
| 562 |
tb_start = tb->page_addr[1];
|
| 563 |
tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| 564 |
} |
| 565 |
if (!(tb_end <= start || tb_start >= end)) {
|
| 566 |
tb_phys_invalidate(tb, -1);
|
| 567 |
} |
| 568 |
tb = tb_next; |
| 569 |
} |
| 570 |
#if !defined(CONFIG_USER_ONLY)
|
| 571 |
/* if no code remaining, no need to continue to use slow writes */
|
| 572 |
if (!p->first_tb) {
|
| 573 |
invalidate_page_bitmap(p); |
| 574 |
tlb_unprotect_code_phys(cpu_single_env, start); |
| 575 |
} |
| 576 |
#endif
|
| 577 |
} |
| 578 |
|
| 579 |
/* len must be <= 8 and start must be a multiple of len */
|
| 580 |
static inline void tb_invalidate_phys_page_fast(target_ulong start, int len) |
| 581 |
{
|
| 582 |
PageDesc *p; |
| 583 |
int offset, b;
|
| 584 |
|
| 585 |
p = page_find(start >> TARGET_PAGE_BITS); |
| 586 |
if (!p)
|
| 587 |
return;
|
| 588 |
if (p->code_bitmap) {
|
| 589 |
offset = start & ~TARGET_PAGE_MASK; |
| 590 |
b = p->code_bitmap[offset >> 3] >> (offset & 7); |
| 591 |
if (b & ((1 << len) - 1)) |
| 592 |
goto do_invalidate;
|
| 593 |
} else {
|
| 594 |
do_invalidate:
|
| 595 |
tb_invalidate_phys_page_range(start, start + len); |
| 596 |
} |
| 597 |
} |
| 598 |
|
| 599 |
/* invalidate all TBs which intersect with the target virtual page
|
| 600 |
starting in range [start;end[. This function is usually used when
|
| 601 |
the target processor flushes its I-cache. NOTE: start and end must
|
| 602 |
refer to the same physical page */
|
| 603 |
void tb_invalidate_page_range(target_ulong start, target_ulong end)
|
| 604 |
{
|
| 605 |
int n;
|
| 606 |
PageDesc *p; |
| 607 |
TranslationBlock *tb, *tb_next; |
| 608 |
target_ulong pc; |
| 609 |
target_ulong phys_start; |
| 610 |
|
| 611 |
#if !defined(CONFIG_USER_ONLY)
|
| 612 |
{
|
| 613 |
VirtPageDesc *vp; |
| 614 |
vp = virt_page_find(start >> TARGET_PAGE_BITS); |
| 615 |
if (!vp)
|
| 616 |
return;
|
| 617 |
if (vp->valid_tag != virt_valid_tag)
|
| 618 |
return;
|
| 619 |
phys_start = vp->phys_addr + (start & ~TARGET_PAGE_MASK); |
| 620 |
} |
| 621 |
#else
|
| 622 |
phys_start = start; |
| 623 |
#endif
|
| 624 |
p = page_find(phys_start >> TARGET_PAGE_BITS); |
| 625 |
if (!p)
|
| 626 |
return;
|
| 627 |
/* we remove all the TBs in the range [start, end[ */
|
| 628 |
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
| 629 |
tb = p->first_tb; |
| 630 |
while (tb != NULL) { |
| 631 |
n = (long)tb & 3; |
| 632 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 633 |
tb_next = tb->page_next[n]; |
| 634 |
pc = tb->pc; |
| 635 |
if (!((pc + tb->size) <= start || pc >= end)) {
|
| 636 |
tb_phys_invalidate(tb, -1);
|
| 637 |
} |
| 638 |
tb = tb_next; |
| 639 |
} |
| 640 |
#if !defined(CONFIG_USER_ONLY)
|
| 641 |
/* if no code remaining, no need to continue to use slow writes */
|
| 642 |
if (!p->first_tb)
|
| 643 |
tlb_unprotect_code(cpu_single_env, start); |
| 644 |
#endif
|
| 645 |
} |
| 646 |
|
| 647 |
#if !defined(CONFIG_SOFTMMU)
|
| 648 |
static void tb_invalidate_phys_page(target_ulong addr) |
| 649 |
{
|
| 650 |
int n;
|
| 651 |
PageDesc *p; |
| 652 |
TranslationBlock *tb; |
| 653 |
|
| 654 |
addr &= TARGET_PAGE_MASK; |
| 655 |
p = page_find(addr >> TARGET_PAGE_BITS); |
| 656 |
if (!p)
|
| 657 |
return;
|
| 658 |
tb = p->first_tb; |
| 659 |
while (tb != NULL) { |
| 660 |
n = (long)tb & 3; |
| 661 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 662 |
tb_phys_invalidate(tb, addr); |
| 663 |
tb = tb->page_next[n]; |
| 664 |
} |
| 665 |
p->first_tb = NULL;
|
| 666 |
} |
| 667 |
#endif
|
| 668 |
|
| 669 |
/* add the tb in the target page and protect it if necessary */
|
| 670 |
static inline void tb_alloc_page(TranslationBlock *tb, |
| 671 |
unsigned int n, unsigned int page_addr) |
| 672 |
{
|
| 673 |
PageDesc *p; |
| 674 |
TranslationBlock *last_first_tb; |
| 675 |
|
| 676 |
tb->page_addr[n] = page_addr; |
| 677 |
p = page_find(page_addr >> TARGET_PAGE_BITS); |
| 678 |
tb->page_next[n] = p->first_tb; |
| 679 |
last_first_tb = p->first_tb; |
| 680 |
p->first_tb = (TranslationBlock *)((long)tb | n);
|
| 681 |
invalidate_page_bitmap(p); |
| 682 |
|
| 683 |
#if defined(CONFIG_USER_ONLY)
|
| 684 |
if (p->flags & PAGE_WRITE) {
|
| 685 |
unsigned long host_start, host_end, addr; |
| 686 |
int prot;
|
| 687 |
|
| 688 |
/* force the host page as non writable (writes will have a
|
| 689 |
page fault + mprotect overhead) */
|
| 690 |
host_start = page_addr & host_page_mask; |
| 691 |
host_end = host_start + host_page_size; |
| 692 |
prot = 0;
|
| 693 |
for(addr = host_start; addr < host_end; addr += TARGET_PAGE_SIZE)
|
| 694 |
prot |= page_get_flags(addr); |
| 695 |
mprotect((void *)host_start, host_page_size,
|
| 696 |
(prot & PAGE_BITS) & ~PAGE_WRITE); |
| 697 |
#ifdef DEBUG_TB_INVALIDATE
|
| 698 |
printf("protecting code page: 0x%08lx\n",
|
| 699 |
host_start); |
| 700 |
#endif
|
| 701 |
p->flags &= ~PAGE_WRITE; |
| 702 |
} |
| 703 |
#else
|
| 704 |
/* if some code is already present, then the pages are already
|
| 705 |
protected. So we handle the case where only the first TB is
|
| 706 |
allocated in a physical page */
|
| 707 |
if (!last_first_tb) {
|
| 708 |
target_ulong virt_addr; |
| 709 |
|
| 710 |
virt_addr = (tb->pc & TARGET_PAGE_MASK) + (n << TARGET_PAGE_BITS); |
| 711 |
tlb_protect_code(cpu_single_env, virt_addr); |
| 712 |
} |
| 713 |
#endif
|
| 714 |
} |
| 715 |
|
| 716 |
/* Allocate a new translation block. Flush the translation buffer if
|
| 717 |
too many translation blocks or too much generated code. */
|
| 718 |
TranslationBlock *tb_alloc(unsigned long pc) |
| 719 |
{
|
| 720 |
TranslationBlock *tb; |
| 721 |
|
| 722 |
if (nb_tbs >= CODE_GEN_MAX_BLOCKS ||
|
| 723 |
(code_gen_ptr - code_gen_buffer) >= CODE_GEN_BUFFER_MAX_SIZE) |
| 724 |
return NULL; |
| 725 |
tb = &tbs[nb_tbs++]; |
| 726 |
tb->pc = pc; |
| 727 |
return tb;
|
| 728 |
} |
| 729 |
|
| 730 |
/* add a new TB and link it to the physical page tables. phys_page2 is
|
| 731 |
(-1) to indicate that only one page contains the TB. */
|
| 732 |
void tb_link_phys(TranslationBlock *tb,
|
| 733 |
target_ulong phys_pc, target_ulong phys_page2) |
| 734 |
{
|
| 735 |
unsigned int h; |
| 736 |
TranslationBlock **ptb; |
| 737 |
|
| 738 |
/* add in the physical hash table */
|
| 739 |
h = tb_phys_hash_func(phys_pc); |
| 740 |
ptb = &tb_phys_hash[h]; |
| 741 |
tb->phys_hash_next = *ptb; |
| 742 |
*ptb = tb; |
| 743 |
|
| 744 |
/* add in the page list */
|
| 745 |
tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
|
| 746 |
if (phys_page2 != -1) |
| 747 |
tb_alloc_page(tb, 1, phys_page2);
|
| 748 |
else
|
| 749 |
tb->page_addr[1] = -1; |
| 750 |
#ifdef DEBUG_TB_CHECK
|
| 751 |
tb_page_check(); |
| 752 |
#endif
|
| 753 |
} |
| 754 |
|
| 755 |
/* link the tb with the other TBs */
|
| 756 |
void tb_link(TranslationBlock *tb)
|
| 757 |
{
|
| 758 |
#if !defined(CONFIG_USER_ONLY)
|
| 759 |
{
|
| 760 |
VirtPageDesc *vp; |
| 761 |
target_ulong addr; |
| 762 |
|
| 763 |
/* save the code memory mappings (needed to invalidate the code) */
|
| 764 |
addr = tb->pc & TARGET_PAGE_MASK; |
| 765 |
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS); |
| 766 |
#ifdef DEBUG_TLB_CHECK
|
| 767 |
if (vp->valid_tag == virt_valid_tag &&
|
| 768 |
vp->phys_addr != tb->page_addr[0]) {
|
| 769 |
printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n",
|
| 770 |
addr, tb->page_addr[0], vp->phys_addr);
|
| 771 |
} |
| 772 |
#endif
|
| 773 |
vp->phys_addr = tb->page_addr[0];
|
| 774 |
vp->valid_tag = virt_valid_tag; |
| 775 |
|
| 776 |
if (tb->page_addr[1] != -1) { |
| 777 |
addr += TARGET_PAGE_SIZE; |
| 778 |
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS); |
| 779 |
#ifdef DEBUG_TLB_CHECK
|
| 780 |
if (vp->valid_tag == virt_valid_tag &&
|
| 781 |
vp->phys_addr != tb->page_addr[1]) {
|
| 782 |
printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n",
|
| 783 |
addr, tb->page_addr[1], vp->phys_addr);
|
| 784 |
} |
| 785 |
#endif
|
| 786 |
vp->phys_addr = tb->page_addr[1];
|
| 787 |
vp->valid_tag = virt_valid_tag; |
| 788 |
} |
| 789 |
} |
| 790 |
#endif
|
| 791 |
|
| 792 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); |
| 793 |
tb->jmp_next[0] = NULL; |
| 794 |
tb->jmp_next[1] = NULL; |
| 795 |
|
| 796 |
/* init original jump addresses */
|
| 797 |
if (tb->tb_next_offset[0] != 0xffff) |
| 798 |
tb_reset_jump(tb, 0);
|
| 799 |
if (tb->tb_next_offset[1] != 0xffff) |
| 800 |
tb_reset_jump(tb, 1);
|
| 801 |
} |
| 802 |
|
| 803 |
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
|
| 804 |
tb[1].tc_ptr. Return NULL if not found */
|
| 805 |
TranslationBlock *tb_find_pc(unsigned long tc_ptr) |
| 806 |
{
|
| 807 |
int m_min, m_max, m;
|
| 808 |
unsigned long v; |
| 809 |
TranslationBlock *tb; |
| 810 |
|
| 811 |
if (nb_tbs <= 0) |
| 812 |
return NULL; |
| 813 |
if (tc_ptr < (unsigned long)code_gen_buffer || |
| 814 |
tc_ptr >= (unsigned long)code_gen_ptr) |
| 815 |
return NULL; |
| 816 |
/* binary search (cf Knuth) */
|
| 817 |
m_min = 0;
|
| 818 |
m_max = nb_tbs - 1;
|
| 819 |
while (m_min <= m_max) {
|
| 820 |
m = (m_min + m_max) >> 1;
|
| 821 |
tb = &tbs[m]; |
| 822 |
v = (unsigned long)tb->tc_ptr; |
| 823 |
if (v == tc_ptr)
|
| 824 |
return tb;
|
| 825 |
else if (tc_ptr < v) { |
| 826 |
m_max = m - 1;
|
| 827 |
} else {
|
| 828 |
m_min = m + 1;
|
| 829 |
} |
| 830 |
} |
| 831 |
return &tbs[m_max];
|
| 832 |
} |
| 833 |
|
| 834 |
static void tb_reset_jump_recursive(TranslationBlock *tb); |
| 835 |
|
| 836 |
static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) |
| 837 |
{
|
| 838 |
TranslationBlock *tb1, *tb_next, **ptb; |
| 839 |
unsigned int n1; |
| 840 |
|
| 841 |
tb1 = tb->jmp_next[n]; |
| 842 |
if (tb1 != NULL) { |
| 843 |
/* find head of list */
|
| 844 |
for(;;) {
|
| 845 |
n1 = (long)tb1 & 3; |
| 846 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 847 |
if (n1 == 2) |
| 848 |
break;
|
| 849 |
tb1 = tb1->jmp_next[n1]; |
| 850 |
} |
| 851 |
/* we are now sure now that tb jumps to tb1 */
|
| 852 |
tb_next = tb1; |
| 853 |
|
| 854 |
/* remove tb from the jmp_first list */
|
| 855 |
ptb = &tb_next->jmp_first; |
| 856 |
for(;;) {
|
| 857 |
tb1 = *ptb; |
| 858 |
n1 = (long)tb1 & 3; |
| 859 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 860 |
if (n1 == n && tb1 == tb)
|
| 861 |
break;
|
| 862 |
ptb = &tb1->jmp_next[n1]; |
| 863 |
} |
| 864 |
*ptb = tb->jmp_next[n]; |
| 865 |
tb->jmp_next[n] = NULL;
|
| 866 |
|
| 867 |
/* suppress the jump to next tb in generated code */
|
| 868 |
tb_reset_jump(tb, n); |
| 869 |
|
| 870 |
/* suppress jumps in the tb on which we could have jumped */
|
| 871 |
tb_reset_jump_recursive(tb_next); |
| 872 |
} |
| 873 |
} |
| 874 |
|
| 875 |
static void tb_reset_jump_recursive(TranslationBlock *tb) |
| 876 |
{
|
| 877 |
tb_reset_jump_recursive2(tb, 0);
|
| 878 |
tb_reset_jump_recursive2(tb, 1);
|
| 879 |
} |
| 880 |
|
| 881 |
/* add a breakpoint. EXCP_DEBUG is returned by the CPU loop if a
|
| 882 |
breakpoint is reached */
|
| 883 |
int cpu_breakpoint_insert(CPUState *env, uint32_t pc)
|
| 884 |
{
|
| 885 |
#if defined(TARGET_I386)
|
| 886 |
int i;
|
| 887 |
|
| 888 |
for(i = 0; i < env->nb_breakpoints; i++) { |
| 889 |
if (env->breakpoints[i] == pc)
|
| 890 |
return 0; |
| 891 |
} |
| 892 |
|
| 893 |
if (env->nb_breakpoints >= MAX_BREAKPOINTS)
|
| 894 |
return -1; |
| 895 |
env->breakpoints[env->nb_breakpoints++] = pc; |
| 896 |
tb_invalidate_page_range(pc, pc + 1);
|
| 897 |
return 0; |
| 898 |
#else
|
| 899 |
return -1; |
| 900 |
#endif
|
| 901 |
} |
| 902 |
|
| 903 |
/* remove a breakpoint */
|
| 904 |
int cpu_breakpoint_remove(CPUState *env, uint32_t pc)
|
| 905 |
{
|
| 906 |
#if defined(TARGET_I386)
|
| 907 |
int i;
|
| 908 |
for(i = 0; i < env->nb_breakpoints; i++) { |
| 909 |
if (env->breakpoints[i] == pc)
|
| 910 |
goto found;
|
| 911 |
} |
| 912 |
return -1; |
| 913 |
found:
|
| 914 |
memmove(&env->breakpoints[i], &env->breakpoints[i + 1],
|
| 915 |
(env->nb_breakpoints - (i + 1)) * sizeof(env->breakpoints[0])); |
| 916 |
env->nb_breakpoints--; |
| 917 |
tb_invalidate_page_range(pc, pc + 1);
|
| 918 |
return 0; |
| 919 |
#else
|
| 920 |
return -1; |
| 921 |
#endif
|
| 922 |
} |
| 923 |
|
| 924 |
/* enable or disable single step mode. EXCP_DEBUG is returned by the
|
| 925 |
CPU loop after each instruction */
|
| 926 |
void cpu_single_step(CPUState *env, int enabled) |
| 927 |
{
|
| 928 |
#if defined(TARGET_I386)
|
| 929 |
if (env->singlestep_enabled != enabled) {
|
| 930 |
env->singlestep_enabled = enabled; |
| 931 |
/* must flush all the translated code to avoid inconsistancies */
|
| 932 |
/* XXX: only flush what is necessary */
|
| 933 |
tb_flush(env); |
| 934 |
} |
| 935 |
#endif
|
| 936 |
} |
| 937 |
|
| 938 |
/* enable or disable low levels log */
|
| 939 |
void cpu_set_log(int log_flags) |
| 940 |
{
|
| 941 |
loglevel = log_flags; |
| 942 |
if (loglevel && !logfile) {
|
| 943 |
logfile = fopen(logfilename, "w");
|
| 944 |
if (!logfile) {
|
| 945 |
perror(logfilename); |
| 946 |
_exit(1);
|
| 947 |
} |
| 948 |
#if !defined(CONFIG_SOFTMMU)
|
| 949 |
/* must avoid mmap() usage of glibc by setting a buffer "by hand" */
|
| 950 |
{
|
| 951 |
static uint8_t logfile_buf[4096]; |
| 952 |
setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
|
| 953 |
} |
| 954 |
#else
|
| 955 |
setvbuf(logfile, NULL, _IOLBF, 0); |
| 956 |
#endif
|
| 957 |
} |
| 958 |
} |
| 959 |
|
| 960 |
void cpu_set_log_filename(const char *filename) |
| 961 |
{
|
| 962 |
logfilename = strdup(filename); |
| 963 |
} |
| 964 |
|
| 965 |
/* mask must never be zero, except for A20 change call */
|
| 966 |
void cpu_interrupt(CPUState *env, int mask) |
| 967 |
{
|
| 968 |
TranslationBlock *tb; |
| 969 |
static int interrupt_lock; |
| 970 |
|
| 971 |
env->interrupt_request |= mask; |
| 972 |
/* if the cpu is currently executing code, we must unlink it and
|
| 973 |
all the potentially executing TB */
|
| 974 |
tb = env->current_tb; |
| 975 |
if (tb && !testandset(&interrupt_lock)) {
|
| 976 |
env->current_tb = NULL;
|
| 977 |
tb_reset_jump_recursive(tb); |
| 978 |
interrupt_lock = 0;
|
| 979 |
} |
| 980 |
} |
| 981 |
|
| 982 |
|
| 983 |
void cpu_abort(CPUState *env, const char *fmt, ...) |
| 984 |
{
|
| 985 |
va_list ap; |
| 986 |
|
| 987 |
va_start(ap, fmt); |
| 988 |
fprintf(stderr, "qemu: fatal: ");
|
| 989 |
vfprintf(stderr, fmt, ap); |
| 990 |
fprintf(stderr, "\n");
|
| 991 |
#ifdef TARGET_I386
|
| 992 |
cpu_x86_dump_state(env, stderr, X86_DUMP_FPU | X86_DUMP_CCOP); |
| 993 |
#endif
|
| 994 |
va_end(ap); |
| 995 |
abort(); |
| 996 |
} |
| 997 |
|
| 998 |
#if !defined(CONFIG_USER_ONLY)
|
| 999 |
|
| 1000 |
/* NOTE: if flush_global is true, also flush global entries (not
|
| 1001 |
implemented yet) */
|
| 1002 |
void tlb_flush(CPUState *env, int flush_global) |
| 1003 |
{
|
| 1004 |
int i;
|
| 1005 |
|
| 1006 |
#if defined(DEBUG_TLB)
|
| 1007 |
printf("tlb_flush:\n");
|
| 1008 |
#endif
|
| 1009 |
/* must reset current TB so that interrupts cannot modify the
|
| 1010 |
links while we are modifying them */
|
| 1011 |
env->current_tb = NULL;
|
| 1012 |
|
| 1013 |
for(i = 0; i < CPU_TLB_SIZE; i++) { |
| 1014 |
env->tlb_read[0][i].address = -1; |
| 1015 |
env->tlb_write[0][i].address = -1; |
| 1016 |
env->tlb_read[1][i].address = -1; |
| 1017 |
env->tlb_write[1][i].address = -1; |
| 1018 |
} |
| 1019 |
|
| 1020 |
virt_page_flush(); |
| 1021 |
for(i = 0;i < CODE_GEN_HASH_SIZE; i++) |
| 1022 |
tb_hash[i] = NULL;
|
| 1023 |
|
| 1024 |
#if !defined(CONFIG_SOFTMMU)
|
| 1025 |
munmap((void *)MMAP_AREA_START, MMAP_AREA_END - MMAP_AREA_START);
|
| 1026 |
#endif
|
| 1027 |
} |
| 1028 |
|
| 1029 |
static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, uint32_t addr) |
| 1030 |
{
|
| 1031 |
if (addr == (tlb_entry->address &
|
| 1032 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK))) |
| 1033 |
tlb_entry->address = -1;
|
| 1034 |
} |
| 1035 |
|
| 1036 |
void tlb_flush_page(CPUState *env, uint32_t addr)
|
| 1037 |
{
|
| 1038 |
int i, n;
|
| 1039 |
VirtPageDesc *vp; |
| 1040 |
PageDesc *p; |
| 1041 |
TranslationBlock *tb; |
| 1042 |
|
| 1043 |
#if defined(DEBUG_TLB)
|
| 1044 |
printf("tlb_flush_page: 0x%08x\n", addr);
|
| 1045 |
#endif
|
| 1046 |
/* must reset current TB so that interrupts cannot modify the
|
| 1047 |
links while we are modifying them */
|
| 1048 |
env->current_tb = NULL;
|
| 1049 |
|
| 1050 |
addr &= TARGET_PAGE_MASK; |
| 1051 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 1052 |
tlb_flush_entry(&env->tlb_read[0][i], addr);
|
| 1053 |
tlb_flush_entry(&env->tlb_write[0][i], addr);
|
| 1054 |
tlb_flush_entry(&env->tlb_read[1][i], addr);
|
| 1055 |
tlb_flush_entry(&env->tlb_write[1][i], addr);
|
| 1056 |
|
| 1057 |
/* remove from the virtual pc hash table all the TB at this
|
| 1058 |
virtual address */
|
| 1059 |
|
| 1060 |
vp = virt_page_find(addr >> TARGET_PAGE_BITS); |
| 1061 |
if (vp && vp->valid_tag == virt_valid_tag) {
|
| 1062 |
p = page_find(vp->phys_addr >> TARGET_PAGE_BITS); |
| 1063 |
if (p) {
|
| 1064 |
/* we remove all the links to the TBs in this virtual page */
|
| 1065 |
tb = p->first_tb; |
| 1066 |
while (tb != NULL) { |
| 1067 |
n = (long)tb & 3; |
| 1068 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 1069 |
if ((tb->pc & TARGET_PAGE_MASK) == addr ||
|
| 1070 |
((tb->pc + tb->size - 1) & TARGET_PAGE_MASK) == addr) {
|
| 1071 |
tb_invalidate(tb); |
| 1072 |
} |
| 1073 |
tb = tb->page_next[n]; |
| 1074 |
} |
| 1075 |
} |
| 1076 |
vp->valid_tag = 0;
|
| 1077 |
} |
| 1078 |
|
| 1079 |
#if !defined(CONFIG_SOFTMMU)
|
| 1080 |
if (addr < MMAP_AREA_END)
|
| 1081 |
munmap((void *)addr, TARGET_PAGE_SIZE);
|
| 1082 |
#endif
|
| 1083 |
} |
| 1084 |
|
| 1085 |
static inline void tlb_protect_code1(CPUTLBEntry *tlb_entry, uint32_t addr) |
| 1086 |
{
|
| 1087 |
if (addr == (tlb_entry->address &
|
| 1088 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) && |
| 1089 |
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_CODE && |
| 1090 |
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_ROM) {
|
| 1091 |
tlb_entry->address |= IO_MEM_CODE; |
| 1092 |
tlb_entry->addend -= (unsigned long)phys_ram_base; |
| 1093 |
} |
| 1094 |
} |
| 1095 |
|
| 1096 |
/* update the TLBs so that writes to code in the virtual page 'addr'
|
| 1097 |
can be detected */
|
| 1098 |
static void tlb_protect_code(CPUState *env, uint32_t addr) |
| 1099 |
{
|
| 1100 |
int i;
|
| 1101 |
|
| 1102 |
addr &= TARGET_PAGE_MASK; |
| 1103 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 1104 |
tlb_protect_code1(&env->tlb_write[0][i], addr);
|
| 1105 |
tlb_protect_code1(&env->tlb_write[1][i], addr);
|
| 1106 |
#if !defined(CONFIG_SOFTMMU)
|
| 1107 |
/* NOTE: as we generated the code for this page, it is already at
|
| 1108 |
least readable */
|
| 1109 |
if (addr < MMAP_AREA_END)
|
| 1110 |
mprotect((void *)addr, TARGET_PAGE_SIZE, PROT_READ);
|
| 1111 |
#endif
|
| 1112 |
} |
| 1113 |
|
| 1114 |
static inline void tlb_unprotect_code1(CPUTLBEntry *tlb_entry, uint32_t addr) |
| 1115 |
{
|
| 1116 |
if (addr == (tlb_entry->address &
|
| 1117 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) && |
| 1118 |
(tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE) {
|
| 1119 |
tlb_entry->address &= TARGET_PAGE_MASK; |
| 1120 |
tlb_entry->addend += (unsigned long)phys_ram_base; |
| 1121 |
} |
| 1122 |
} |
| 1123 |
|
| 1124 |
/* update the TLB so that writes in virtual page 'addr' are no longer
|
| 1125 |
tested self modifying code */
|
| 1126 |
static void tlb_unprotect_code(CPUState *env, uint32_t addr) |
| 1127 |
{
|
| 1128 |
int i;
|
| 1129 |
|
| 1130 |
addr &= TARGET_PAGE_MASK; |
| 1131 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 1132 |
tlb_unprotect_code1(&env->tlb_write[0][i], addr);
|
| 1133 |
tlb_unprotect_code1(&env->tlb_write[1][i], addr);
|
| 1134 |
} |
| 1135 |
|
| 1136 |
static inline void tlb_unprotect_code2(CPUTLBEntry *tlb_entry, |
| 1137 |
uint32_t phys_addr) |
| 1138 |
{
|
| 1139 |
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE &&
|
| 1140 |
((tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend) == phys_addr) {
|
| 1141 |
tlb_entry->address &= TARGET_PAGE_MASK; |
| 1142 |
tlb_entry->addend += (unsigned long)phys_ram_base; |
| 1143 |
} |
| 1144 |
} |
| 1145 |
|
| 1146 |
/* update the TLB so that writes in physical page 'phys_addr' are no longer
|
| 1147 |
tested self modifying code */
|
| 1148 |
/* XXX: find a way to improve it */
|
| 1149 |
static void tlb_unprotect_code_phys(CPUState *env, uint32_t phys_addr) |
| 1150 |
{
|
| 1151 |
int i;
|
| 1152 |
|
| 1153 |
phys_addr &= TARGET_PAGE_MASK; |
| 1154 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
| 1155 |
tlb_unprotect_code2(&env->tlb_write[0][i], phys_addr);
|
| 1156 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
| 1157 |
tlb_unprotect_code2(&env->tlb_write[1][i], phys_addr);
|
| 1158 |
} |
| 1159 |
|
| 1160 |
/* add a new TLB entry. At most one entry for a given virtual
|
| 1161 |
address is permitted. */
|
| 1162 |
int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot, |
| 1163 |
int is_user, int is_softmmu) |
| 1164 |
{
|
| 1165 |
PageDesc *p; |
| 1166 |
target_ulong pd; |
| 1167 |
TranslationBlock *first_tb; |
| 1168 |
unsigned int index; |
| 1169 |
target_ulong address, addend; |
| 1170 |
int ret;
|
| 1171 |
|
| 1172 |
p = page_find(paddr >> TARGET_PAGE_BITS); |
| 1173 |
if (!p) {
|
| 1174 |
pd = IO_MEM_UNASSIGNED; |
| 1175 |
first_tb = NULL;
|
| 1176 |
} else {
|
| 1177 |
pd = p->phys_offset; |
| 1178 |
first_tb = p->first_tb; |
| 1179 |
} |
| 1180 |
#if defined(DEBUG_TLB)
|
| 1181 |
printf("tlb_set_page: vaddr=0x%08x paddr=0x%08x prot=%x u=%d c=%d smmu=%d pd=0x%08x\n",
|
| 1182 |
vaddr, paddr, prot, is_user, (first_tb != NULL), is_softmmu, pd);
|
| 1183 |
#endif
|
| 1184 |
|
| 1185 |
ret = 0;
|
| 1186 |
#if !defined(CONFIG_SOFTMMU)
|
| 1187 |
if (is_softmmu)
|
| 1188 |
#endif
|
| 1189 |
{
|
| 1190 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
|
| 1191 |
/* IO memory case */
|
| 1192 |
address = vaddr | pd; |
| 1193 |
addend = paddr; |
| 1194 |
} else {
|
| 1195 |
/* standard memory */
|
| 1196 |
address = vaddr; |
| 1197 |
addend = (unsigned long)phys_ram_base + (pd & TARGET_PAGE_MASK); |
| 1198 |
} |
| 1199 |
|
| 1200 |
index = (vaddr >> 12) & (CPU_TLB_SIZE - 1); |
| 1201 |
addend -= vaddr; |
| 1202 |
if (prot & PROT_READ) {
|
| 1203 |
env->tlb_read[is_user][index].address = address; |
| 1204 |
env->tlb_read[is_user][index].addend = addend; |
| 1205 |
} else {
|
| 1206 |
env->tlb_read[is_user][index].address = -1;
|
| 1207 |
env->tlb_read[is_user][index].addend = -1;
|
| 1208 |
} |
| 1209 |
if (prot & PROT_WRITE) {
|
| 1210 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM) {
|
| 1211 |
/* ROM: access is ignored (same as unassigned) */
|
| 1212 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_ROM; |
| 1213 |
env->tlb_write[is_user][index].addend = addend - (unsigned long)phys_ram_base; |
| 1214 |
} else if (first_tb) { |
| 1215 |
/* if code is present, we use a specific memory
|
| 1216 |
handler. It works only for physical memory access */
|
| 1217 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_CODE; |
| 1218 |
env->tlb_write[is_user][index].addend = addend - (unsigned long)phys_ram_base; |
| 1219 |
} else {
|
| 1220 |
env->tlb_write[is_user][index].address = address; |
| 1221 |
env->tlb_write[is_user][index].addend = addend; |
| 1222 |
} |
| 1223 |
} else {
|
| 1224 |
env->tlb_write[is_user][index].address = -1;
|
| 1225 |
env->tlb_write[is_user][index].addend = -1;
|
| 1226 |
} |
| 1227 |
} |
| 1228 |
#if !defined(CONFIG_SOFTMMU)
|
| 1229 |
else {
|
| 1230 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
|
| 1231 |
/* IO access: no mapping is done as it will be handled by the
|
| 1232 |
soft MMU */
|
| 1233 |
if (!(env->hflags & HF_SOFTMMU_MASK))
|
| 1234 |
ret = 2;
|
| 1235 |
} else {
|
| 1236 |
void *map_addr;
|
| 1237 |
if (prot & PROT_WRITE) {
|
| 1238 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM || first_tb) {
|
| 1239 |
/* ROM: we do as if code was inside */
|
| 1240 |
/* if code is present, we only map as read only and save the
|
| 1241 |
original mapping */
|
| 1242 |
VirtPageDesc *vp; |
| 1243 |
|
| 1244 |
vp = virt_page_find_alloc(vaddr >> TARGET_PAGE_BITS); |
| 1245 |
vp->phys_addr = pd; |
| 1246 |
vp->prot = prot; |
| 1247 |
vp->valid_tag = virt_valid_tag; |
| 1248 |
prot &= ~PAGE_WRITE; |
| 1249 |
} |
| 1250 |
} |
| 1251 |
map_addr = mmap((void *)vaddr, TARGET_PAGE_SIZE, prot,
|
| 1252 |
MAP_SHARED | MAP_FIXED, phys_ram_fd, (pd & TARGET_PAGE_MASK)); |
| 1253 |
if (map_addr == MAP_FAILED) {
|
| 1254 |
cpu_abort(env, "mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
|
| 1255 |
paddr, vaddr); |
| 1256 |
} |
| 1257 |
} |
| 1258 |
} |
| 1259 |
#endif
|
| 1260 |
return ret;
|
| 1261 |
} |
| 1262 |
|
| 1263 |
/* called from signal handler: invalidate the code and unprotect the
|
| 1264 |
page. Return TRUE if the fault was succesfully handled. */
|
| 1265 |
int page_unprotect(unsigned long addr) |
| 1266 |
{
|
| 1267 |
#if !defined(CONFIG_SOFTMMU)
|
| 1268 |
VirtPageDesc *vp; |
| 1269 |
|
| 1270 |
#if defined(DEBUG_TLB)
|
| 1271 |
printf("page_unprotect: addr=0x%08x\n", addr);
|
| 1272 |
#endif
|
| 1273 |
addr &= TARGET_PAGE_MASK; |
| 1274 |
vp = virt_page_find(addr >> TARGET_PAGE_BITS); |
| 1275 |
if (!vp)
|
| 1276 |
return 0; |
| 1277 |
/* NOTE: in this case, validate_tag is _not_ tested as it
|
| 1278 |
validates only the code TLB */
|
| 1279 |
if (vp->valid_tag != virt_valid_tag)
|
| 1280 |
return 0; |
| 1281 |
if (!(vp->prot & PAGE_WRITE))
|
| 1282 |
return 0; |
| 1283 |
#if defined(DEBUG_TLB)
|
| 1284 |
printf("page_unprotect: addr=0x%08x phys_addr=0x%08x prot=%x\n",
|
| 1285 |
addr, vp->phys_addr, vp->prot); |
| 1286 |
#endif
|
| 1287 |
tb_invalidate_phys_page(vp->phys_addr); |
| 1288 |
mprotect((void *)addr, TARGET_PAGE_SIZE, vp->prot);
|
| 1289 |
return 1; |
| 1290 |
#else
|
| 1291 |
return 0; |
| 1292 |
#endif
|
| 1293 |
} |
| 1294 |
|
| 1295 |
#else
|
| 1296 |
|
| 1297 |
void tlb_flush(CPUState *env, int flush_global) |
| 1298 |
{
|
| 1299 |
} |
| 1300 |
|
| 1301 |
void tlb_flush_page(CPUState *env, uint32_t addr)
|
| 1302 |
{
|
| 1303 |
} |
| 1304 |
|
| 1305 |
void tlb_flush_page_write(CPUState *env, uint32_t addr)
|
| 1306 |
{
|
| 1307 |
} |
| 1308 |
|
| 1309 |
int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot, |
| 1310 |
int is_user, int is_softmmu) |
| 1311 |
{
|
| 1312 |
return 0; |
| 1313 |
} |
| 1314 |
|
| 1315 |
/* dump memory mappings */
|
| 1316 |
void page_dump(FILE *f)
|
| 1317 |
{
|
| 1318 |
unsigned long start, end; |
| 1319 |
int i, j, prot, prot1;
|
| 1320 |
PageDesc *p; |
| 1321 |
|
| 1322 |
fprintf(f, "%-8s %-8s %-8s %s\n",
|
| 1323 |
"start", "end", "size", "prot"); |
| 1324 |
start = -1;
|
| 1325 |
end = -1;
|
| 1326 |
prot = 0;
|
| 1327 |
for(i = 0; i <= L1_SIZE; i++) { |
| 1328 |
if (i < L1_SIZE)
|
| 1329 |
p = l1_map[i]; |
| 1330 |
else
|
| 1331 |
p = NULL;
|
| 1332 |
for(j = 0;j < L2_SIZE; j++) { |
| 1333 |
if (!p)
|
| 1334 |
prot1 = 0;
|
| 1335 |
else
|
| 1336 |
prot1 = p[j].flags; |
| 1337 |
if (prot1 != prot) {
|
| 1338 |
end = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS);
|
| 1339 |
if (start != -1) { |
| 1340 |
fprintf(f, "%08lx-%08lx %08lx %c%c%c\n",
|
| 1341 |
start, end, end - start, |
| 1342 |
prot & PAGE_READ ? 'r' : '-', |
| 1343 |
prot & PAGE_WRITE ? 'w' : '-', |
| 1344 |
prot & PAGE_EXEC ? 'x' : '-'); |
| 1345 |
} |
| 1346 |
if (prot1 != 0) |
| 1347 |
start = end; |
| 1348 |
else
|
| 1349 |
start = -1;
|
| 1350 |
prot = prot1; |
| 1351 |
} |
| 1352 |
if (!p)
|
| 1353 |
break;
|
| 1354 |
} |
| 1355 |
} |
| 1356 |
} |
| 1357 |
|
| 1358 |
int page_get_flags(unsigned long address) |
| 1359 |
{
|
| 1360 |
PageDesc *p; |
| 1361 |
|
| 1362 |
p = page_find(address >> TARGET_PAGE_BITS); |
| 1363 |
if (!p)
|
| 1364 |
return 0; |
| 1365 |
return p->flags;
|
| 1366 |
} |
| 1367 |
|
| 1368 |
/* modify the flags of a page and invalidate the code if
|
| 1369 |
necessary. The flag PAGE_WRITE_ORG is positionned automatically
|
| 1370 |
depending on PAGE_WRITE */
|
| 1371 |
void page_set_flags(unsigned long start, unsigned long end, int flags) |
| 1372 |
{
|
| 1373 |
PageDesc *p; |
| 1374 |
unsigned long addr; |
| 1375 |
|
| 1376 |
start = start & TARGET_PAGE_MASK; |
| 1377 |
end = TARGET_PAGE_ALIGN(end); |
| 1378 |
if (flags & PAGE_WRITE)
|
| 1379 |
flags |= PAGE_WRITE_ORG; |
| 1380 |
spin_lock(&tb_lock); |
| 1381 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
| 1382 |
p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
| 1383 |
/* if the write protection is set, then we invalidate the code
|
| 1384 |
inside */
|
| 1385 |
if (!(p->flags & PAGE_WRITE) &&
|
| 1386 |
(flags & PAGE_WRITE) && |
| 1387 |
p->first_tb) {
|
| 1388 |
tb_invalidate_phys_page(addr); |
| 1389 |
} |
| 1390 |
p->flags = flags; |
| 1391 |
} |
| 1392 |
spin_unlock(&tb_lock); |
| 1393 |
} |
| 1394 |
|
| 1395 |
/* called from signal handler: invalidate the code and unprotect the
|
| 1396 |
page. Return TRUE if the fault was succesfully handled. */
|
| 1397 |
int page_unprotect(unsigned long address) |
| 1398 |
{
|
| 1399 |
unsigned int page_index, prot, pindex; |
| 1400 |
PageDesc *p, *p1; |
| 1401 |
unsigned long host_start, host_end, addr; |
| 1402 |
|
| 1403 |
host_start = address & host_page_mask; |
| 1404 |
page_index = host_start >> TARGET_PAGE_BITS; |
| 1405 |
p1 = page_find(page_index); |
| 1406 |
if (!p1)
|
| 1407 |
return 0; |
| 1408 |
host_end = host_start + host_page_size; |
| 1409 |
p = p1; |
| 1410 |
prot = 0;
|
| 1411 |
for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) {
|
| 1412 |
prot |= p->flags; |
| 1413 |
p++; |
| 1414 |
} |
| 1415 |
/* if the page was really writable, then we change its
|
| 1416 |
protection back to writable */
|
| 1417 |
if (prot & PAGE_WRITE_ORG) {
|
| 1418 |
pindex = (address - host_start) >> TARGET_PAGE_BITS; |
| 1419 |
if (!(p1[pindex].flags & PAGE_WRITE)) {
|
| 1420 |
mprotect((void *)host_start, host_page_size,
|
| 1421 |
(prot & PAGE_BITS) | PAGE_WRITE); |
| 1422 |
p1[pindex].flags |= PAGE_WRITE; |
| 1423 |
/* and since the content will be modified, we must invalidate
|
| 1424 |
the corresponding translated code. */
|
| 1425 |
tb_invalidate_phys_page(address); |
| 1426 |
#ifdef DEBUG_TB_CHECK
|
| 1427 |
tb_invalidate_check(address); |
| 1428 |
#endif
|
| 1429 |
return 1; |
| 1430 |
} |
| 1431 |
} |
| 1432 |
return 0; |
| 1433 |
} |
| 1434 |
|
| 1435 |
/* call this function when system calls directly modify a memory area */
|
| 1436 |
void page_unprotect_range(uint8_t *data, unsigned long data_size) |
| 1437 |
{
|
| 1438 |
unsigned long start, end, addr; |
| 1439 |
|
| 1440 |
start = (unsigned long)data; |
| 1441 |
end = start + data_size; |
| 1442 |
start &= TARGET_PAGE_MASK; |
| 1443 |
end = TARGET_PAGE_ALIGN(end); |
| 1444 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
| 1445 |
page_unprotect(addr); |
| 1446 |
} |
| 1447 |
} |
| 1448 |
|
| 1449 |
#endif /* defined(CONFIG_USER_ONLY) */ |
| 1450 |
|
| 1451 |
/* register physical memory. 'size' must be a multiple of the target
|
| 1452 |
page size. If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
|
| 1453 |
io memory page */
|
| 1454 |
void cpu_register_physical_memory(unsigned long start_addr, unsigned long size, |
| 1455 |
long phys_offset)
|
| 1456 |
{
|
| 1457 |
unsigned long addr, end_addr; |
| 1458 |
PageDesc *p; |
| 1459 |
|
| 1460 |
end_addr = start_addr + size; |
| 1461 |
for(addr = start_addr; addr < end_addr; addr += TARGET_PAGE_SIZE) {
|
| 1462 |
p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
| 1463 |
p->phys_offset = phys_offset; |
| 1464 |
if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM)
|
| 1465 |
phys_offset += TARGET_PAGE_SIZE; |
| 1466 |
} |
| 1467 |
} |
| 1468 |
|
| 1469 |
static uint32_t unassigned_mem_readb(uint32_t addr)
|
| 1470 |
{
|
| 1471 |
return 0; |
| 1472 |
} |
| 1473 |
|
| 1474 |
static void unassigned_mem_writeb(uint32_t addr, uint32_t val) |
| 1475 |
{
|
| 1476 |
} |
| 1477 |
|
| 1478 |
static CPUReadMemoryFunc *unassigned_mem_read[3] = { |
| 1479 |
unassigned_mem_readb, |
| 1480 |
unassigned_mem_readb, |
| 1481 |
unassigned_mem_readb, |
| 1482 |
}; |
| 1483 |
|
| 1484 |
static CPUWriteMemoryFunc *unassigned_mem_write[3] = { |
| 1485 |
unassigned_mem_writeb, |
| 1486 |
unassigned_mem_writeb, |
| 1487 |
unassigned_mem_writeb, |
| 1488 |
}; |
| 1489 |
|
| 1490 |
/* self modifying code support in soft mmu mode : writing to a page
|
| 1491 |
containing code comes to these functions */
|
| 1492 |
|
| 1493 |
static void code_mem_writeb(uint32_t addr, uint32_t val) |
| 1494 |
{
|
| 1495 |
#if !defined(CONFIG_USER_ONLY)
|
| 1496 |
tb_invalidate_phys_page_fast(addr, 1);
|
| 1497 |
#endif
|
| 1498 |
stb_raw(phys_ram_base + addr, val); |
| 1499 |
} |
| 1500 |
|
| 1501 |
static void code_mem_writew(uint32_t addr, uint32_t val) |
| 1502 |
{
|
| 1503 |
#if !defined(CONFIG_USER_ONLY)
|
| 1504 |
tb_invalidate_phys_page_fast(addr, 2);
|
| 1505 |
#endif
|
| 1506 |
stw_raw(phys_ram_base + addr, val); |
| 1507 |
} |
| 1508 |
|
| 1509 |
static void code_mem_writel(uint32_t addr, uint32_t val) |
| 1510 |
{
|
| 1511 |
#if !defined(CONFIG_USER_ONLY)
|
| 1512 |
tb_invalidate_phys_page_fast(addr, 4);
|
| 1513 |
#endif
|
| 1514 |
stl_raw(phys_ram_base + addr, val); |
| 1515 |
} |
| 1516 |
|
| 1517 |
static CPUReadMemoryFunc *code_mem_read[3] = { |
| 1518 |
NULL, /* never used */ |
| 1519 |
NULL, /* never used */ |
| 1520 |
NULL, /* never used */ |
| 1521 |
}; |
| 1522 |
|
| 1523 |
static CPUWriteMemoryFunc *code_mem_write[3] = { |
| 1524 |
code_mem_writeb, |
| 1525 |
code_mem_writew, |
| 1526 |
code_mem_writel, |
| 1527 |
}; |
| 1528 |
|
| 1529 |
static void io_mem_init(void) |
| 1530 |
{
|
| 1531 |
cpu_register_io_memory(IO_MEM_ROM >> IO_MEM_SHIFT, code_mem_read, unassigned_mem_write); |
| 1532 |
cpu_register_io_memory(IO_MEM_UNASSIGNED >> IO_MEM_SHIFT, unassigned_mem_read, unassigned_mem_write); |
| 1533 |
cpu_register_io_memory(IO_MEM_CODE >> IO_MEM_SHIFT, code_mem_read, code_mem_write); |
| 1534 |
io_mem_nb = 4;
|
| 1535 |
} |
| 1536 |
|
| 1537 |
/* mem_read and mem_write are arrays of functions containing the
|
| 1538 |
function to access byte (index 0), word (index 1) and dword (index
|
| 1539 |
2). All functions must be supplied. If io_index is non zero, the
|
| 1540 |
corresponding io zone is modified. If it is zero, a new io zone is
|
| 1541 |
allocated. The return value can be used with
|
| 1542 |
cpu_register_physical_memory(). (-1) is returned if error. */
|
| 1543 |
int cpu_register_io_memory(int io_index, |
| 1544 |
CPUReadMemoryFunc **mem_read, |
| 1545 |
CPUWriteMemoryFunc **mem_write) |
| 1546 |
{
|
| 1547 |
int i;
|
| 1548 |
|
| 1549 |
if (io_index <= 0) { |
| 1550 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
| 1551 |
return -1; |
| 1552 |
io_index = io_mem_nb++; |
| 1553 |
} else {
|
| 1554 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
| 1555 |
return -1; |
| 1556 |
} |
| 1557 |
|
| 1558 |
for(i = 0;i < 3; i++) { |
| 1559 |
io_mem_read[io_index][i] = mem_read[i]; |
| 1560 |
io_mem_write[io_index][i] = mem_write[i]; |
| 1561 |
} |
| 1562 |
return io_index << IO_MEM_SHIFT;
|
| 1563 |
} |
| 1564 |
|
| 1565 |
/* physical memory access (slow version, mainly for debug) */
|
| 1566 |
#if defined(CONFIG_USER_ONLY)
|
| 1567 |
void cpu_physical_memory_rw(CPUState *env, uint8_t *buf, target_ulong addr,
|
| 1568 |
int len, int is_write) |
| 1569 |
{
|
| 1570 |
int l, flags;
|
| 1571 |
target_ulong page; |
| 1572 |
|
| 1573 |
while (len > 0) { |
| 1574 |
page = addr & TARGET_PAGE_MASK; |
| 1575 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 1576 |
if (l > len)
|
| 1577 |
l = len; |
| 1578 |
flags = page_get_flags(page); |
| 1579 |
if (!(flags & PAGE_VALID))
|
| 1580 |
return;
|
| 1581 |
if (is_write) {
|
| 1582 |
if (!(flags & PAGE_WRITE))
|
| 1583 |
return;
|
| 1584 |
memcpy((uint8_t *)addr, buf, len); |
| 1585 |
} else {
|
| 1586 |
if (!(flags & PAGE_READ))
|
| 1587 |
return;
|
| 1588 |
memcpy(buf, (uint8_t *)addr, len); |
| 1589 |
} |
| 1590 |
len -= l; |
| 1591 |
buf += l; |
| 1592 |
addr += l; |
| 1593 |
} |
| 1594 |
} |
| 1595 |
#else
|
| 1596 |
void cpu_physical_memory_rw(CPUState *env, uint8_t *buf, target_ulong addr,
|
| 1597 |
int len, int is_write) |
| 1598 |
{
|
| 1599 |
int l, io_index;
|
| 1600 |
uint8_t *ptr; |
| 1601 |
uint32_t val; |
| 1602 |
target_ulong page, pd; |
| 1603 |
PageDesc *p; |
| 1604 |
|
| 1605 |
while (len > 0) { |
| 1606 |
page = addr & TARGET_PAGE_MASK; |
| 1607 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 1608 |
if (l > len)
|
| 1609 |
l = len; |
| 1610 |
p = page_find(page >> TARGET_PAGE_BITS); |
| 1611 |
if (!p) {
|
| 1612 |
pd = IO_MEM_UNASSIGNED; |
| 1613 |
} else {
|
| 1614 |
pd = p->phys_offset; |
| 1615 |
} |
| 1616 |
|
| 1617 |
if (is_write) {
|
| 1618 |
if ((pd & ~TARGET_PAGE_MASK) != 0) { |
| 1619 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 1620 |
if (l >= 4 && ((addr & 3) == 0)) { |
| 1621 |
/* 32 bit read access */
|
| 1622 |
val = ldl_raw(buf); |
| 1623 |
io_mem_write[io_index][2](addr, val);
|
| 1624 |
l = 4;
|
| 1625 |
} else if (l >= 2 && ((addr & 1) == 0)) { |
| 1626 |
/* 16 bit read access */
|
| 1627 |
val = lduw_raw(buf); |
| 1628 |
io_mem_write[io_index][1](addr, val);
|
| 1629 |
l = 2;
|
| 1630 |
} else {
|
| 1631 |
/* 8 bit access */
|
| 1632 |
val = ldub_raw(buf); |
| 1633 |
io_mem_write[io_index][0](addr, val);
|
| 1634 |
l = 1;
|
| 1635 |
} |
| 1636 |
} else {
|
| 1637 |
/* RAM case */
|
| 1638 |
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) + |
| 1639 |
(addr & ~TARGET_PAGE_MASK); |
| 1640 |
memcpy(ptr, buf, l); |
| 1641 |
} |
| 1642 |
} else {
|
| 1643 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
| 1644 |
(pd & ~TARGET_PAGE_MASK) != IO_MEM_CODE) {
|
| 1645 |
/* I/O case */
|
| 1646 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 1647 |
if (l >= 4 && ((addr & 3) == 0)) { |
| 1648 |
/* 32 bit read access */
|
| 1649 |
val = io_mem_read[io_index][2](addr);
|
| 1650 |
stl_raw(buf, val); |
| 1651 |
l = 4;
|
| 1652 |
} else if (l >= 2 && ((addr & 1) == 0)) { |
| 1653 |
/* 16 bit read access */
|
| 1654 |
val = io_mem_read[io_index][1](addr);
|
| 1655 |
stw_raw(buf, val); |
| 1656 |
l = 2;
|
| 1657 |
} else {
|
| 1658 |
/* 8 bit access */
|
| 1659 |
val = io_mem_read[io_index][0](addr);
|
| 1660 |
stb_raw(buf, val); |
| 1661 |
l = 1;
|
| 1662 |
} |
| 1663 |
} else {
|
| 1664 |
/* RAM case */
|
| 1665 |
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) + |
| 1666 |
(addr & ~TARGET_PAGE_MASK); |
| 1667 |
memcpy(buf, ptr, l); |
| 1668 |
} |
| 1669 |
} |
| 1670 |
len -= l; |
| 1671 |
buf += l; |
| 1672 |
addr += l; |
| 1673 |
} |
| 1674 |
} |
| 1675 |
#endif
|
| 1676 |
|
| 1677 |
/* virtual memory access for debug */
|
| 1678 |
int cpu_memory_rw_debug(CPUState *env,
|
| 1679 |
uint8_t *buf, target_ulong addr, int len, int is_write) |
| 1680 |
{
|
| 1681 |
int l;
|
| 1682 |
target_ulong page, phys_addr; |
| 1683 |
|
| 1684 |
while (len > 0) { |
| 1685 |
page = addr & TARGET_PAGE_MASK; |
| 1686 |
phys_addr = cpu_get_phys_page_debug(env, page); |
| 1687 |
/* if no physical page mapped, return an error */
|
| 1688 |
if (phys_addr == -1) |
| 1689 |
return -1; |
| 1690 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 1691 |
if (l > len)
|
| 1692 |
l = len; |
| 1693 |
cpu_physical_memory_rw(env, buf, |
| 1694 |
phys_addr + (addr & ~TARGET_PAGE_MASK), l, |
| 1695 |
is_write); |
| 1696 |
len -= l; |
| 1697 |
buf += l; |
| 1698 |
addr += l; |
| 1699 |
} |
| 1700 |
return 0; |
| 1701 |
} |
| 1702 |
|
| 1703 |
#if !defined(CONFIG_USER_ONLY)
|
| 1704 |
|
| 1705 |
#define MMUSUFFIX _cmmu
|
| 1706 |
#define GETPC() NULL |
| 1707 |
#define env cpu_single_env
|
| 1708 |
|
| 1709 |
#define SHIFT 0 |
| 1710 |
#include "softmmu_template.h" |
| 1711 |
|
| 1712 |
#define SHIFT 1 |
| 1713 |
#include "softmmu_template.h" |
| 1714 |
|
| 1715 |
#define SHIFT 2 |
| 1716 |
#include "softmmu_template.h" |
| 1717 |
|
| 1718 |
#define SHIFT 3 |
| 1719 |
#include "softmmu_template.h" |
| 1720 |
|
| 1721 |
#undef env
|
| 1722 |
|
| 1723 |
#endif
|