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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 "config.h" |
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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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#if !defined(CONFIG_SOFTMMU)
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#include <sys/mman.h> |
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#endif
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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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|
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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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#ifdef _WIN32
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real_host_page_size = 4096;
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#else
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real_host_page_size = getpagesize(); |
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#endif
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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]; |
249 |
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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} |
283 |
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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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} |
298 |
} |
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} |
300 |
} |
301 |
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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++) { |
309 |
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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} |
316 |
} |
317 |
} |
318 |
} |
319 |
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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; |
324 |
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/* suppress any remaining jumps to this TB */
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tb1 = tb->jmp_first; |
327 |
for(;;) {
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n1 = (long)tb1 & 3; |
329 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
330 |
if (n1 == 2) |
331 |
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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} |
339 |
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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, |
344 |
int next_offset)
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{ |
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TranslationBlock *tb1; |
347 |
for(;;) {
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tb1 = *ptb; |
349 |
if (tb1 == tb) {
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*ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
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break;
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} |
353 |
ptb = (TranslationBlock **)((char *)tb1 + next_offset);
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} |
355 |
} |
356 |
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357 |
static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) |
358 |
{ |
359 |
TranslationBlock *tb1; |
360 |
unsigned int n1; |
361 |
|
362 |
for(;;) {
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363 |
tb1 = *ptb; |
364 |
n1 = (long)tb1 & 3; |
365 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
366 |
if (tb1 == tb) {
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367 |
*ptb = tb1->page_next[n1]; |
368 |
break;
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369 |
} |
370 |
ptb = &tb1->page_next[n1]; |
371 |
} |
372 |
} |
373 |
|
374 |
static inline void tb_jmp_remove(TranslationBlock *tb, int n) |
375 |
{ |
376 |
TranslationBlock *tb1, **ptb; |
377 |
unsigned int n1; |
378 |
|
379 |
ptb = &tb->jmp_next[n]; |
380 |
tb1 = *ptb; |
381 |
if (tb1) {
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382 |
/* find tb(n) in circular list */
|
383 |
for(;;) {
|
384 |
tb1 = *ptb; |
385 |
n1 = (long)tb1 & 3; |
386 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
387 |
if (n1 == n && tb1 == tb)
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388 |
break;
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389 |
if (n1 == 2) { |
390 |
ptb = &tb1->jmp_first; |
391 |
} else {
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392 |
ptb = &tb1->jmp_next[n1]; |
393 |
} |
394 |
} |
395 |
/* now we can suppress tb(n) from the list */
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396 |
*ptb = tb->jmp_next[n]; |
397 |
|
398 |
tb->jmp_next[n] = NULL;
|
399 |
} |
400 |
} |
401 |
|
402 |
/* reset the jump entry 'n' of a TB so that it is not chained to
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403 |
another TB */
|
404 |
static inline void tb_reset_jump(TranslationBlock *tb, int n) |
405 |
{ |
406 |
tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); |
407 |
} |
408 |
|
409 |
static inline void tb_invalidate(TranslationBlock *tb) |
410 |
{ |
411 |
unsigned int h, n1; |
412 |
TranslationBlock *tb1, *tb2, **ptb; |
413 |
|
414 |
tb_invalidated_flag = 1;
|
415 |
|
416 |
/* remove the TB from the hash list */
|
417 |
h = tb_hash_func(tb->pc); |
418 |
ptb = &tb_hash[h]; |
419 |
for(;;) {
|
420 |
tb1 = *ptb; |
421 |
/* NOTE: the TB is not necessarily linked in the hash. It
|
422 |
indicates that it is not currently used */
|
423 |
if (tb1 == NULL) |
424 |
return;
|
425 |
if (tb1 == tb) {
|
426 |
*ptb = tb1->hash_next; |
427 |
break;
|
428 |
} |
429 |
ptb = &tb1->hash_next; |
430 |
} |
431 |
|
432 |
/* suppress this TB from the two jump lists */
|
433 |
tb_jmp_remove(tb, 0);
|
434 |
tb_jmp_remove(tb, 1);
|
435 |
|
436 |
/* suppress any remaining jumps to this TB */
|
437 |
tb1 = tb->jmp_first; |
438 |
for(;;) {
|
439 |
n1 = (long)tb1 & 3; |
440 |
if (n1 == 2) |
441 |
break;
|
442 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
443 |
tb2 = tb1->jmp_next[n1]; |
444 |
tb_reset_jump(tb1, n1); |
445 |
tb1->jmp_next[n1] = NULL;
|
446 |
tb1 = tb2; |
447 |
} |
448 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ |
449 |
} |
450 |
|
451 |
static inline void tb_phys_invalidate(TranslationBlock *tb, unsigned int page_addr) |
452 |
{ |
453 |
PageDesc *p; |
454 |
unsigned int h; |
455 |
target_ulong phys_pc; |
456 |
|
457 |
/* remove the TB from the hash list */
|
458 |
phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
459 |
h = tb_phys_hash_func(phys_pc); |
460 |
tb_remove(&tb_phys_hash[h], tb, |
461 |
offsetof(TranslationBlock, phys_hash_next)); |
462 |
|
463 |
/* remove the TB from the page list */
|
464 |
if (tb->page_addr[0] != page_addr) { |
465 |
p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
|
466 |
tb_page_remove(&p->first_tb, tb); |
467 |
invalidate_page_bitmap(p); |
468 |
} |
469 |
if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { |
470 |
p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
|
471 |
tb_page_remove(&p->first_tb, tb); |
472 |
invalidate_page_bitmap(p); |
473 |
} |
474 |
|
475 |
tb_invalidate(tb); |
476 |
} |
477 |
|
478 |
static inline void set_bits(uint8_t *tab, int start, int len) |
479 |
{ |
480 |
int end, mask, end1;
|
481 |
|
482 |
end = start + len; |
483 |
tab += start >> 3;
|
484 |
mask = 0xff << (start & 7); |
485 |
if ((start & ~7) == (end & ~7)) { |
486 |
if (start < end) {
|
487 |
mask &= ~(0xff << (end & 7)); |
488 |
*tab |= mask; |
489 |
} |
490 |
} else {
|
491 |
*tab++ |= mask; |
492 |
start = (start + 8) & ~7; |
493 |
end1 = end & ~7;
|
494 |
while (start < end1) {
|
495 |
*tab++ = 0xff;
|
496 |
start += 8;
|
497 |
} |
498 |
if (start < end) {
|
499 |
mask = ~(0xff << (end & 7)); |
500 |
*tab |= mask; |
501 |
} |
502 |
} |
503 |
} |
504 |
|
505 |
static void build_page_bitmap(PageDesc *p) |
506 |
{ |
507 |
int n, tb_start, tb_end;
|
508 |
TranslationBlock *tb; |
509 |
|
510 |
p->code_bitmap = qemu_malloc(TARGET_PAGE_SIZE / 8);
|
511 |
if (!p->code_bitmap)
|
512 |
return;
|
513 |
memset(p->code_bitmap, 0, TARGET_PAGE_SIZE / 8); |
514 |
|
515 |
tb = p->first_tb; |
516 |
while (tb != NULL) { |
517 |
n = (long)tb & 3; |
518 |
tb = (TranslationBlock *)((long)tb & ~3); |
519 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
520 |
if (n == 0) { |
521 |
/* NOTE: tb_end may be after the end of the page, but
|
522 |
it is not a problem */
|
523 |
tb_start = tb->pc & ~TARGET_PAGE_MASK; |
524 |
tb_end = tb_start + tb->size; |
525 |
if (tb_end > TARGET_PAGE_SIZE)
|
526 |
tb_end = TARGET_PAGE_SIZE; |
527 |
} else {
|
528 |
tb_start = 0;
|
529 |
tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
530 |
} |
531 |
set_bits(p->code_bitmap, tb_start, tb_end - tb_start); |
532 |
tb = tb->page_next[n]; |
533 |
} |
534 |
} |
535 |
|
536 |
/* invalidate all TBs which intersect with the target physical page
|
537 |
starting in range [start;end[. NOTE: start and end must refer to
|
538 |
the same physical page. 'vaddr' is a virtual address referencing
|
539 |
the physical page of code. It is only used an a hint if there is no
|
540 |
code left. */
|
541 |
static void tb_invalidate_phys_page_range(target_ulong start, target_ulong end, |
542 |
target_ulong vaddr) |
543 |
{ |
544 |
int n;
|
545 |
PageDesc *p; |
546 |
TranslationBlock *tb, *tb_next; |
547 |
target_ulong tb_start, tb_end; |
548 |
|
549 |
p = page_find(start >> TARGET_PAGE_BITS); |
550 |
if (!p)
|
551 |
return;
|
552 |
if (!p->code_bitmap &&
|
553 |
++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD) { |
554 |
/* build code bitmap */
|
555 |
build_page_bitmap(p); |
556 |
} |
557 |
|
558 |
/* we remove all the TBs in the range [start, end[ */
|
559 |
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
560 |
tb = p->first_tb; |
561 |
while (tb != NULL) { |
562 |
n = (long)tb & 3; |
563 |
tb = (TranslationBlock *)((long)tb & ~3); |
564 |
tb_next = tb->page_next[n]; |
565 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
566 |
if (n == 0) { |
567 |
/* NOTE: tb_end may be after the end of the page, but
|
568 |
it is not a problem */
|
569 |
tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
570 |
tb_end = tb_start + tb->size; |
571 |
} else {
|
572 |
tb_start = tb->page_addr[1];
|
573 |
tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
574 |
} |
575 |
if (!(tb_end <= start || tb_start >= end)) {
|
576 |
tb_phys_invalidate(tb, -1);
|
577 |
} |
578 |
tb = tb_next; |
579 |
} |
580 |
#if !defined(CONFIG_USER_ONLY)
|
581 |
/* if no code remaining, no need to continue to use slow writes */
|
582 |
if (!p->first_tb) {
|
583 |
invalidate_page_bitmap(p); |
584 |
tlb_unprotect_code_phys(cpu_single_env, start, vaddr); |
585 |
} |
586 |
#endif
|
587 |
} |
588 |
|
589 |
/* len must be <= 8 and start must be a multiple of len */
|
590 |
static inline void tb_invalidate_phys_page_fast(target_ulong start, int len, target_ulong vaddr) |
591 |
{ |
592 |
PageDesc *p; |
593 |
int offset, b;
|
594 |
#if 0
|
595 |
if (cpu_single_env->cr[0] & CR0_PE_MASK) {
|
596 |
printf("modifying code at 0x%x size=%d EIP=%x\n",
|
597 |
(vaddr & TARGET_PAGE_MASK) | (start & ~TARGET_PAGE_MASK), len,
|
598 |
cpu_single_env->eip);
|
599 |
}
|
600 |
#endif
|
601 |
p = page_find(start >> TARGET_PAGE_BITS); |
602 |
if (!p)
|
603 |
return;
|
604 |
if (p->code_bitmap) {
|
605 |
offset = start & ~TARGET_PAGE_MASK; |
606 |
b = p->code_bitmap[offset >> 3] >> (offset & 7); |
607 |
if (b & ((1 << len) - 1)) |
608 |
goto do_invalidate;
|
609 |
} else {
|
610 |
do_invalidate:
|
611 |
tb_invalidate_phys_page_range(start, start + len, vaddr); |
612 |
} |
613 |
} |
614 |
|
615 |
/* invalidate all TBs which intersect with the target virtual page
|
616 |
starting in range [start;end[. This function is usually used when
|
617 |
the target processor flushes its I-cache. NOTE: start and end must
|
618 |
refer to the same physical page */
|
619 |
void tb_invalidate_page_range(target_ulong start, target_ulong end)
|
620 |
{ |
621 |
int n;
|
622 |
PageDesc *p; |
623 |
TranslationBlock *tb, *tb_next; |
624 |
target_ulong pc; |
625 |
target_ulong phys_start; |
626 |
|
627 |
#if !defined(CONFIG_USER_ONLY)
|
628 |
{ |
629 |
VirtPageDesc *vp; |
630 |
vp = virt_page_find(start >> TARGET_PAGE_BITS); |
631 |
if (!vp)
|
632 |
return;
|
633 |
if (vp->valid_tag != virt_valid_tag)
|
634 |
return;
|
635 |
phys_start = vp->phys_addr + (start & ~TARGET_PAGE_MASK); |
636 |
} |
637 |
#else
|
638 |
phys_start = start; |
639 |
#endif
|
640 |
p = page_find(phys_start >> TARGET_PAGE_BITS); |
641 |
if (!p)
|
642 |
return;
|
643 |
/* we remove all the TBs in the range [start, end[ */
|
644 |
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
645 |
tb = p->first_tb; |
646 |
while (tb != NULL) { |
647 |
n = (long)tb & 3; |
648 |
tb = (TranslationBlock *)((long)tb & ~3); |
649 |
tb_next = tb->page_next[n]; |
650 |
pc = tb->pc; |
651 |
if (!((pc + tb->size) <= start || pc >= end)) {
|
652 |
tb_phys_invalidate(tb, -1);
|
653 |
} |
654 |
tb = tb_next; |
655 |
} |
656 |
#if !defined(CONFIG_USER_ONLY)
|
657 |
/* if no code remaining, no need to continue to use slow writes */
|
658 |
if (!p->first_tb)
|
659 |
tlb_unprotect_code(cpu_single_env, start); |
660 |
#endif
|
661 |
} |
662 |
|
663 |
#if !defined(CONFIG_SOFTMMU)
|
664 |
static void tb_invalidate_phys_page(target_ulong addr) |
665 |
{ |
666 |
int n;
|
667 |
PageDesc *p; |
668 |
TranslationBlock *tb; |
669 |
|
670 |
addr &= TARGET_PAGE_MASK; |
671 |
p = page_find(addr >> TARGET_PAGE_BITS); |
672 |
if (!p)
|
673 |
return;
|
674 |
tb = p->first_tb; |
675 |
while (tb != NULL) { |
676 |
n = (long)tb & 3; |
677 |
tb = (TranslationBlock *)((long)tb & ~3); |
678 |
tb_phys_invalidate(tb, addr); |
679 |
tb = tb->page_next[n]; |
680 |
} |
681 |
p->first_tb = NULL;
|
682 |
} |
683 |
#endif
|
684 |
|
685 |
/* add the tb in the target page and protect it if necessary */
|
686 |
static inline void tb_alloc_page(TranslationBlock *tb, |
687 |
unsigned int n, unsigned int page_addr) |
688 |
{ |
689 |
PageDesc *p; |
690 |
TranslationBlock *last_first_tb; |
691 |
|
692 |
tb->page_addr[n] = page_addr; |
693 |
p = page_find(page_addr >> TARGET_PAGE_BITS); |
694 |
tb->page_next[n] = p->first_tb; |
695 |
last_first_tb = p->first_tb; |
696 |
p->first_tb = (TranslationBlock *)((long)tb | n);
|
697 |
invalidate_page_bitmap(p); |
698 |
|
699 |
#if defined(CONFIG_USER_ONLY)
|
700 |
if (p->flags & PAGE_WRITE) {
|
701 |
unsigned long host_start, host_end, addr; |
702 |
int prot;
|
703 |
|
704 |
/* force the host page as non writable (writes will have a
|
705 |
page fault + mprotect overhead) */
|
706 |
host_start = page_addr & host_page_mask; |
707 |
host_end = host_start + host_page_size; |
708 |
prot = 0;
|
709 |
for(addr = host_start; addr < host_end; addr += TARGET_PAGE_SIZE)
|
710 |
prot |= page_get_flags(addr); |
711 |
mprotect((void *)host_start, host_page_size,
|
712 |
(prot & PAGE_BITS) & ~PAGE_WRITE); |
713 |
#ifdef DEBUG_TB_INVALIDATE
|
714 |
printf("protecting code page: 0x%08lx\n",
|
715 |
host_start); |
716 |
#endif
|
717 |
p->flags &= ~PAGE_WRITE; |
718 |
} |
719 |
#else
|
720 |
/* if some code is already present, then the pages are already
|
721 |
protected. So we handle the case where only the first TB is
|
722 |
allocated in a physical page */
|
723 |
if (!last_first_tb) {
|
724 |
target_ulong virt_addr; |
725 |
|
726 |
virt_addr = (tb->pc & TARGET_PAGE_MASK) + (n << TARGET_PAGE_BITS); |
727 |
tlb_protect_code(cpu_single_env, virt_addr); |
728 |
} |
729 |
#endif
|
730 |
} |
731 |
|
732 |
/* Allocate a new translation block. Flush the translation buffer if
|
733 |
too many translation blocks or too much generated code. */
|
734 |
TranslationBlock *tb_alloc(unsigned long pc) |
735 |
{ |
736 |
TranslationBlock *tb; |
737 |
|
738 |
if (nb_tbs >= CODE_GEN_MAX_BLOCKS ||
|
739 |
(code_gen_ptr - code_gen_buffer) >= CODE_GEN_BUFFER_MAX_SIZE) |
740 |
return NULL; |
741 |
tb = &tbs[nb_tbs++]; |
742 |
tb->pc = pc; |
743 |
tb->cflags = 0;
|
744 |
return tb;
|
745 |
} |
746 |
|
747 |
/* add a new TB and link it to the physical page tables. phys_page2 is
|
748 |
(-1) to indicate that only one page contains the TB. */
|
749 |
void tb_link_phys(TranslationBlock *tb,
|
750 |
target_ulong phys_pc, target_ulong phys_page2) |
751 |
{ |
752 |
unsigned int h; |
753 |
TranslationBlock **ptb; |
754 |
|
755 |
/* add in the physical hash table */
|
756 |
h = tb_phys_hash_func(phys_pc); |
757 |
ptb = &tb_phys_hash[h]; |
758 |
tb->phys_hash_next = *ptb; |
759 |
*ptb = tb; |
760 |
|
761 |
/* add in the page list */
|
762 |
tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
|
763 |
if (phys_page2 != -1) |
764 |
tb_alloc_page(tb, 1, phys_page2);
|
765 |
else
|
766 |
tb->page_addr[1] = -1; |
767 |
#ifdef DEBUG_TB_CHECK
|
768 |
tb_page_check(); |
769 |
#endif
|
770 |
} |
771 |
|
772 |
/* link the tb with the other TBs */
|
773 |
void tb_link(TranslationBlock *tb)
|
774 |
{ |
775 |
#if !defined(CONFIG_USER_ONLY)
|
776 |
{ |
777 |
VirtPageDesc *vp; |
778 |
target_ulong addr; |
779 |
|
780 |
/* save the code memory mappings (needed to invalidate the code) */
|
781 |
addr = tb->pc & TARGET_PAGE_MASK; |
782 |
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS); |
783 |
#ifdef DEBUG_TLB_CHECK
|
784 |
if (vp->valid_tag == virt_valid_tag &&
|
785 |
vp->phys_addr != tb->page_addr[0]) {
|
786 |
printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n",
|
787 |
addr, tb->page_addr[0], vp->phys_addr);
|
788 |
} |
789 |
#endif
|
790 |
vp->phys_addr = tb->page_addr[0];
|
791 |
if (vp->valid_tag != virt_valid_tag) {
|
792 |
vp->valid_tag = virt_valid_tag; |
793 |
#if !defined(CONFIG_SOFTMMU)
|
794 |
vp->prot = 0;
|
795 |
#endif
|
796 |
} |
797 |
|
798 |
if (tb->page_addr[1] != -1) { |
799 |
addr += TARGET_PAGE_SIZE; |
800 |
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS); |
801 |
#ifdef DEBUG_TLB_CHECK
|
802 |
if (vp->valid_tag == virt_valid_tag &&
|
803 |
vp->phys_addr != tb->page_addr[1]) {
|
804 |
printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n",
|
805 |
addr, tb->page_addr[1], vp->phys_addr);
|
806 |
} |
807 |
#endif
|
808 |
vp->phys_addr = tb->page_addr[1];
|
809 |
if (vp->valid_tag != virt_valid_tag) {
|
810 |
vp->valid_tag = virt_valid_tag; |
811 |
#if !defined(CONFIG_SOFTMMU)
|
812 |
vp->prot = 0;
|
813 |
#endif
|
814 |
} |
815 |
} |
816 |
} |
817 |
#endif
|
818 |
|
819 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); |
820 |
tb->jmp_next[0] = NULL; |
821 |
tb->jmp_next[1] = NULL; |
822 |
#ifdef USE_CODE_COPY
|
823 |
tb->cflags &= ~CF_FP_USED; |
824 |
if (tb->cflags & CF_TB_FP_USED)
|
825 |
tb->cflags |= CF_FP_USED; |
826 |
#endif
|
827 |
|
828 |
/* init original jump addresses */
|
829 |
if (tb->tb_next_offset[0] != 0xffff) |
830 |
tb_reset_jump(tb, 0);
|
831 |
if (tb->tb_next_offset[1] != 0xffff) |
832 |
tb_reset_jump(tb, 1);
|
833 |
} |
834 |
|
835 |
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
|
836 |
tb[1].tc_ptr. Return NULL if not found */
|
837 |
TranslationBlock *tb_find_pc(unsigned long tc_ptr) |
838 |
{ |
839 |
int m_min, m_max, m;
|
840 |
unsigned long v; |
841 |
TranslationBlock *tb; |
842 |
|
843 |
if (nb_tbs <= 0) |
844 |
return NULL; |
845 |
if (tc_ptr < (unsigned long)code_gen_buffer || |
846 |
tc_ptr >= (unsigned long)code_gen_ptr) |
847 |
return NULL; |
848 |
/* binary search (cf Knuth) */
|
849 |
m_min = 0;
|
850 |
m_max = nb_tbs - 1;
|
851 |
while (m_min <= m_max) {
|
852 |
m = (m_min + m_max) >> 1;
|
853 |
tb = &tbs[m]; |
854 |
v = (unsigned long)tb->tc_ptr; |
855 |
if (v == tc_ptr)
|
856 |
return tb;
|
857 |
else if (tc_ptr < v) { |
858 |
m_max = m - 1;
|
859 |
} else {
|
860 |
m_min = m + 1;
|
861 |
} |
862 |
} |
863 |
return &tbs[m_max];
|
864 |
} |
865 |
|
866 |
static void tb_reset_jump_recursive(TranslationBlock *tb); |
867 |
|
868 |
static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) |
869 |
{ |
870 |
TranslationBlock *tb1, *tb_next, **ptb; |
871 |
unsigned int n1; |
872 |
|
873 |
tb1 = tb->jmp_next[n]; |
874 |
if (tb1 != NULL) { |
875 |
/* find head of list */
|
876 |
for(;;) {
|
877 |
n1 = (long)tb1 & 3; |
878 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
879 |
if (n1 == 2) |
880 |
break;
|
881 |
tb1 = tb1->jmp_next[n1]; |
882 |
} |
883 |
/* we are now sure now that tb jumps to tb1 */
|
884 |
tb_next = tb1; |
885 |
|
886 |
/* remove tb from the jmp_first list */
|
887 |
ptb = &tb_next->jmp_first; |
888 |
for(;;) {
|
889 |
tb1 = *ptb; |
890 |
n1 = (long)tb1 & 3; |
891 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
892 |
if (n1 == n && tb1 == tb)
|
893 |
break;
|
894 |
ptb = &tb1->jmp_next[n1]; |
895 |
} |
896 |
*ptb = tb->jmp_next[n]; |
897 |
tb->jmp_next[n] = NULL;
|
898 |
|
899 |
/* suppress the jump to next tb in generated code */
|
900 |
tb_reset_jump(tb, n); |
901 |
|
902 |
/* suppress jumps in the tb on which we could have jumped */
|
903 |
tb_reset_jump_recursive(tb_next); |
904 |
} |
905 |
} |
906 |
|
907 |
static void tb_reset_jump_recursive(TranslationBlock *tb) |
908 |
{ |
909 |
tb_reset_jump_recursive2(tb, 0);
|
910 |
tb_reset_jump_recursive2(tb, 1);
|
911 |
} |
912 |
|
913 |
/* add a breakpoint. EXCP_DEBUG is returned by the CPU loop if a
|
914 |
breakpoint is reached */
|
915 |
int cpu_breakpoint_insert(CPUState *env, uint32_t pc)
|
916 |
{ |
917 |
#if defined(TARGET_I386) || defined(TARGET_PPC)
|
918 |
int i;
|
919 |
|
920 |
for(i = 0; i < env->nb_breakpoints; i++) { |
921 |
if (env->breakpoints[i] == pc)
|
922 |
return 0; |
923 |
} |
924 |
|
925 |
if (env->nb_breakpoints >= MAX_BREAKPOINTS)
|
926 |
return -1; |
927 |
env->breakpoints[env->nb_breakpoints++] = pc; |
928 |
tb_invalidate_page_range(pc, pc + 1);
|
929 |
return 0; |
930 |
#else
|
931 |
return -1; |
932 |
#endif
|
933 |
} |
934 |
|
935 |
/* remove a breakpoint */
|
936 |
int cpu_breakpoint_remove(CPUState *env, uint32_t pc)
|
937 |
{ |
938 |
#if defined(TARGET_I386) || defined(TARGET_PPC)
|
939 |
int i;
|
940 |
for(i = 0; i < env->nb_breakpoints; i++) { |
941 |
if (env->breakpoints[i] == pc)
|
942 |
goto found;
|
943 |
} |
944 |
return -1; |
945 |
found:
|
946 |
memmove(&env->breakpoints[i], &env->breakpoints[i + 1],
|
947 |
(env->nb_breakpoints - (i + 1)) * sizeof(env->breakpoints[0])); |
948 |
env->nb_breakpoints--; |
949 |
tb_invalidate_page_range(pc, pc + 1);
|
950 |
return 0; |
951 |
#else
|
952 |
return -1; |
953 |
#endif
|
954 |
} |
955 |
|
956 |
/* enable or disable single step mode. EXCP_DEBUG is returned by the
|
957 |
CPU loop after each instruction */
|
958 |
void cpu_single_step(CPUState *env, int enabled) |
959 |
{ |
960 |
#if defined(TARGET_I386) || defined(TARGET_PPC)
|
961 |
if (env->singlestep_enabled != enabled) {
|
962 |
env->singlestep_enabled = enabled; |
963 |
/* must flush all the translated code to avoid inconsistancies */
|
964 |
/* XXX: only flush what is necessary */
|
965 |
tb_flush(env); |
966 |
} |
967 |
#endif
|
968 |
} |
969 |
|
970 |
/* enable or disable low levels log */
|
971 |
void cpu_set_log(int log_flags) |
972 |
{ |
973 |
loglevel = log_flags; |
974 |
if (loglevel && !logfile) {
|
975 |
logfile = fopen(logfilename, "w");
|
976 |
if (!logfile) {
|
977 |
perror(logfilename); |
978 |
_exit(1);
|
979 |
} |
980 |
#if !defined(CONFIG_SOFTMMU)
|
981 |
/* must avoid mmap() usage of glibc by setting a buffer "by hand" */
|
982 |
{ |
983 |
static uint8_t logfile_buf[4096]; |
984 |
setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
|
985 |
} |
986 |
#else
|
987 |
setvbuf(logfile, NULL, _IOLBF, 0); |
988 |
#endif
|
989 |
} |
990 |
} |
991 |
|
992 |
void cpu_set_log_filename(const char *filename) |
993 |
{ |
994 |
logfilename = strdup(filename); |
995 |
} |
996 |
|
997 |
/* mask must never be zero, except for A20 change call */
|
998 |
void cpu_interrupt(CPUState *env, int mask) |
999 |
{ |
1000 |
TranslationBlock *tb; |
1001 |
static int interrupt_lock; |
1002 |
|
1003 |
env->interrupt_request |= mask; |
1004 |
/* if the cpu is currently executing code, we must unlink it and
|
1005 |
all the potentially executing TB */
|
1006 |
tb = env->current_tb; |
1007 |
if (tb && !testandset(&interrupt_lock)) {
|
1008 |
env->current_tb = NULL;
|
1009 |
tb_reset_jump_recursive(tb); |
1010 |
interrupt_lock = 0;
|
1011 |
} |
1012 |
} |
1013 |
|
1014 |
CPULogItem cpu_log_items[] = { |
1015 |
{ CPU_LOG_TB_OUT_ASM, "out_asm",
|
1016 |
"show generated host assembly code for each compiled TB" },
|
1017 |
{ CPU_LOG_TB_IN_ASM, "in_asm",
|
1018 |
"show target assembly code for each compiled TB" },
|
1019 |
{ CPU_LOG_TB_OP, "op",
|
1020 |
"show micro ops for each compiled TB (only usable if 'in_asm' used)" },
|
1021 |
#ifdef TARGET_I386
|
1022 |
{ CPU_LOG_TB_OP_OPT, "op_opt",
|
1023 |
"show micro ops after optimization for each compiled TB" },
|
1024 |
#endif
|
1025 |
{ CPU_LOG_INT, "int",
|
1026 |
"show interrupts/exceptions in short format" },
|
1027 |
{ CPU_LOG_EXEC, "exec",
|
1028 |
"show trace before each executed TB (lots of logs)" },
|
1029 |
#ifdef TARGET_I386
|
1030 |
{ CPU_LOG_PCALL, "pcall",
|
1031 |
"show protected mode far calls/returns/exceptions" },
|
1032 |
#endif
|
1033 |
{ 0, NULL, NULL }, |
1034 |
}; |
1035 |
|
1036 |
static int cmp1(const char *s1, int n, const char *s2) |
1037 |
{ |
1038 |
if (strlen(s2) != n)
|
1039 |
return 0; |
1040 |
return memcmp(s1, s2, n) == 0; |
1041 |
} |
1042 |
|
1043 |
/* takes a comma separated list of log masks. Return 0 if error. */
|
1044 |
int cpu_str_to_log_mask(const char *str) |
1045 |
{ |
1046 |
CPULogItem *item; |
1047 |
int mask;
|
1048 |
const char *p, *p1; |
1049 |
|
1050 |
p = str; |
1051 |
mask = 0;
|
1052 |
for(;;) {
|
1053 |
p1 = strchr(p, ',');
|
1054 |
if (!p1)
|
1055 |
p1 = p + strlen(p); |
1056 |
for(item = cpu_log_items; item->mask != 0; item++) { |
1057 |
if (cmp1(p, p1 - p, item->name))
|
1058 |
goto found;
|
1059 |
} |
1060 |
return 0; |
1061 |
found:
|
1062 |
mask |= item->mask; |
1063 |
if (*p1 != ',') |
1064 |
break;
|
1065 |
p = p1 + 1;
|
1066 |
} |
1067 |
return mask;
|
1068 |
} |
1069 |
|
1070 |
void cpu_abort(CPUState *env, const char *fmt, ...) |
1071 |
{ |
1072 |
va_list ap; |
1073 |
|
1074 |
va_start(ap, fmt); |
1075 |
fprintf(stderr, "qemu: fatal: ");
|
1076 |
vfprintf(stderr, fmt, ap); |
1077 |
fprintf(stderr, "\n");
|
1078 |
#ifdef TARGET_I386
|
1079 |
cpu_x86_dump_state(env, stderr, X86_DUMP_FPU | X86_DUMP_CCOP); |
1080 |
#endif
|
1081 |
va_end(ap); |
1082 |
abort(); |
1083 |
} |
1084 |
|
1085 |
#if !defined(CONFIG_USER_ONLY)
|
1086 |
|
1087 |
/* NOTE: if flush_global is true, also flush global entries (not
|
1088 |
implemented yet) */
|
1089 |
void tlb_flush(CPUState *env, int flush_global) |
1090 |
{ |
1091 |
int i;
|
1092 |
|
1093 |
#if defined(DEBUG_TLB)
|
1094 |
printf("tlb_flush:\n");
|
1095 |
#endif
|
1096 |
/* must reset current TB so that interrupts cannot modify the
|
1097 |
links while we are modifying them */
|
1098 |
env->current_tb = NULL;
|
1099 |
|
1100 |
for(i = 0; i < CPU_TLB_SIZE; i++) { |
1101 |
env->tlb_read[0][i].address = -1; |
1102 |
env->tlb_write[0][i].address = -1; |
1103 |
env->tlb_read[1][i].address = -1; |
1104 |
env->tlb_write[1][i].address = -1; |
1105 |
} |
1106 |
|
1107 |
virt_page_flush(); |
1108 |
for(i = 0;i < CODE_GEN_HASH_SIZE; i++) |
1109 |
tb_hash[i] = NULL;
|
1110 |
|
1111 |
#if !defined(CONFIG_SOFTMMU)
|
1112 |
munmap((void *)MMAP_AREA_START, MMAP_AREA_END - MMAP_AREA_START);
|
1113 |
#endif
|
1114 |
} |
1115 |
|
1116 |
static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, uint32_t addr) |
1117 |
{ |
1118 |
if (addr == (tlb_entry->address &
|
1119 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK))) |
1120 |
tlb_entry->address = -1;
|
1121 |
} |
1122 |
|
1123 |
void tlb_flush_page(CPUState *env, uint32_t addr)
|
1124 |
{ |
1125 |
int i, n;
|
1126 |
VirtPageDesc *vp; |
1127 |
PageDesc *p; |
1128 |
TranslationBlock *tb; |
1129 |
|
1130 |
#if defined(DEBUG_TLB)
|
1131 |
printf("tlb_flush_page: 0x%08x\n", addr);
|
1132 |
#endif
|
1133 |
/* must reset current TB so that interrupts cannot modify the
|
1134 |
links while we are modifying them */
|
1135 |
env->current_tb = NULL;
|
1136 |
|
1137 |
addr &= TARGET_PAGE_MASK; |
1138 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1139 |
tlb_flush_entry(&env->tlb_read[0][i], addr);
|
1140 |
tlb_flush_entry(&env->tlb_write[0][i], addr);
|
1141 |
tlb_flush_entry(&env->tlb_read[1][i], addr);
|
1142 |
tlb_flush_entry(&env->tlb_write[1][i], addr);
|
1143 |
|
1144 |
/* remove from the virtual pc hash table all the TB at this
|
1145 |
virtual address */
|
1146 |
|
1147 |
vp = virt_page_find(addr >> TARGET_PAGE_BITS); |
1148 |
if (vp && vp->valid_tag == virt_valid_tag) {
|
1149 |
p = page_find(vp->phys_addr >> TARGET_PAGE_BITS); |
1150 |
if (p) {
|
1151 |
/* we remove all the links to the TBs in this virtual page */
|
1152 |
tb = p->first_tb; |
1153 |
while (tb != NULL) { |
1154 |
n = (long)tb & 3; |
1155 |
tb = (TranslationBlock *)((long)tb & ~3); |
1156 |
if ((tb->pc & TARGET_PAGE_MASK) == addr ||
|
1157 |
((tb->pc + tb->size - 1) & TARGET_PAGE_MASK) == addr) {
|
1158 |
tb_invalidate(tb); |
1159 |
} |
1160 |
tb = tb->page_next[n]; |
1161 |
} |
1162 |
} |
1163 |
vp->valid_tag = 0;
|
1164 |
} |
1165 |
|
1166 |
#if !defined(CONFIG_SOFTMMU)
|
1167 |
if (addr < MMAP_AREA_END)
|
1168 |
munmap((void *)addr, TARGET_PAGE_SIZE);
|
1169 |
#endif
|
1170 |
} |
1171 |
|
1172 |
static inline void tlb_protect_code1(CPUTLBEntry *tlb_entry, uint32_t addr) |
1173 |
{ |
1174 |
if (addr == (tlb_entry->address &
|
1175 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) && |
1176 |
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_CODE && |
1177 |
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_ROM) { |
1178 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_CODE; |
1179 |
} |
1180 |
} |
1181 |
|
1182 |
/* update the TLBs so that writes to code in the virtual page 'addr'
|
1183 |
can be detected */
|
1184 |
static void tlb_protect_code(CPUState *env, uint32_t addr) |
1185 |
{ |
1186 |
int i;
|
1187 |
|
1188 |
addr &= TARGET_PAGE_MASK; |
1189 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1190 |
tlb_protect_code1(&env->tlb_write[0][i], addr);
|
1191 |
tlb_protect_code1(&env->tlb_write[1][i], addr);
|
1192 |
#if !defined(CONFIG_SOFTMMU)
|
1193 |
/* NOTE: as we generated the code for this page, it is already at
|
1194 |
least readable */
|
1195 |
if (addr < MMAP_AREA_END)
|
1196 |
mprotect((void *)addr, TARGET_PAGE_SIZE, PROT_READ);
|
1197 |
#endif
|
1198 |
} |
1199 |
|
1200 |
static inline void tlb_unprotect_code1(CPUTLBEntry *tlb_entry, uint32_t addr) |
1201 |
{ |
1202 |
if (addr == (tlb_entry->address &
|
1203 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) && |
1204 |
(tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE) { |
1205 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY; |
1206 |
} |
1207 |
} |
1208 |
|
1209 |
/* update the TLB so that writes in virtual page 'addr' are no longer
|
1210 |
tested self modifying code */
|
1211 |
static void tlb_unprotect_code(CPUState *env, uint32_t addr) |
1212 |
{ |
1213 |
int i;
|
1214 |
|
1215 |
addr &= TARGET_PAGE_MASK; |
1216 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1217 |
tlb_unprotect_code1(&env->tlb_write[0][i], addr);
|
1218 |
tlb_unprotect_code1(&env->tlb_write[1][i], addr);
|
1219 |
} |
1220 |
|
1221 |
static inline void tlb_unprotect_code2(CPUTLBEntry *tlb_entry, |
1222 |
uint32_t phys_addr) |
1223 |
{ |
1224 |
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE &&
|
1225 |
((tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend) == phys_addr) { |
1226 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY; |
1227 |
} |
1228 |
} |
1229 |
|
1230 |
/* update the TLB so that writes in physical page 'phys_addr' are no longer
|
1231 |
tested self modifying code */
|
1232 |
static void tlb_unprotect_code_phys(CPUState *env, uint32_t phys_addr, target_ulong vaddr) |
1233 |
{ |
1234 |
int i;
|
1235 |
|
1236 |
phys_addr &= TARGET_PAGE_MASK; |
1237 |
phys_addr += (long)phys_ram_base;
|
1238 |
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1239 |
tlb_unprotect_code2(&env->tlb_write[0][i], phys_addr);
|
1240 |
tlb_unprotect_code2(&env->tlb_write[1][i], phys_addr);
|
1241 |
} |
1242 |
|
1243 |
static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry, |
1244 |
unsigned long start, unsigned long length) |
1245 |
{ |
1246 |
unsigned long addr; |
1247 |
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
|
1248 |
addr = (tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend; |
1249 |
if ((addr - start) < length) {
|
1250 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY; |
1251 |
} |
1252 |
} |
1253 |
} |
1254 |
|
1255 |
void cpu_physical_memory_reset_dirty(target_ulong start, target_ulong end)
|
1256 |
{ |
1257 |
CPUState *env; |
1258 |
target_ulong length, start1; |
1259 |
int i;
|
1260 |
|
1261 |
start &= TARGET_PAGE_MASK; |
1262 |
end = TARGET_PAGE_ALIGN(end); |
1263 |
|
1264 |
length = end - start; |
1265 |
if (length == 0) |
1266 |
return;
|
1267 |
memset(phys_ram_dirty + (start >> TARGET_PAGE_BITS), 0, length >> TARGET_PAGE_BITS);
|
1268 |
|
1269 |
env = cpu_single_env; |
1270 |
/* we modify the TLB cache so that the dirty bit will be set again
|
1271 |
when accessing the range */
|
1272 |
start1 = start + (unsigned long)phys_ram_base; |
1273 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
1274 |
tlb_reset_dirty_range(&env->tlb_write[0][i], start1, length);
|
1275 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
1276 |
tlb_reset_dirty_range(&env->tlb_write[1][i], start1, length);
|
1277 |
|
1278 |
#if !defined(CONFIG_SOFTMMU)
|
1279 |
/* XXX: this is expensive */
|
1280 |
{ |
1281 |
VirtPageDesc *p; |
1282 |
int j;
|
1283 |
target_ulong addr; |
1284 |
|
1285 |
for(i = 0; i < L1_SIZE; i++) { |
1286 |
p = l1_virt_map[i]; |
1287 |
if (p) {
|
1288 |
addr = i << (TARGET_PAGE_BITS + L2_BITS); |
1289 |
for(j = 0; j < L2_SIZE; j++) { |
1290 |
if (p->valid_tag == virt_valid_tag &&
|
1291 |
p->phys_addr >= start && p->phys_addr < end && |
1292 |
(p->prot & PROT_WRITE)) { |
1293 |
if (addr < MMAP_AREA_END) {
|
1294 |
mprotect((void *)addr, TARGET_PAGE_SIZE,
|
1295 |
p->prot & ~PROT_WRITE); |
1296 |
} |
1297 |
} |
1298 |
addr += TARGET_PAGE_SIZE; |
1299 |
p++; |
1300 |
} |
1301 |
} |
1302 |
} |
1303 |
} |
1304 |
#endif
|
1305 |
} |
1306 |
|
1307 |
static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, |
1308 |
unsigned long start) |
1309 |
{ |
1310 |
unsigned long addr; |
1311 |
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_NOTDIRTY) {
|
1312 |
addr = (tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend; |
1313 |
if (addr == start) {
|
1314 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_RAM; |
1315 |
} |
1316 |
} |
1317 |
} |
1318 |
|
1319 |
/* update the TLB corresponding to virtual page vaddr and phys addr
|
1320 |
addr so that it is no longer dirty */
|
1321 |
static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr) |
1322 |
{ |
1323 |
CPUState *env = cpu_single_env; |
1324 |
int i;
|
1325 |
|
1326 |
phys_ram_dirty[(addr - (unsigned long)phys_ram_base) >> TARGET_PAGE_BITS] = 1; |
1327 |
|
1328 |
addr &= TARGET_PAGE_MASK; |
1329 |
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1330 |
tlb_set_dirty1(&env->tlb_write[0][i], addr);
|
1331 |
tlb_set_dirty1(&env->tlb_write[1][i], addr);
|
1332 |
} |
1333 |
|
1334 |
/* add a new TLB entry. At most one entry for a given virtual address
|
1335 |
is permitted. Return 0 if OK or 2 if the page could not be mapped
|
1336 |
(can only happen in non SOFTMMU mode for I/O pages or pages
|
1337 |
conflicting with the host address space). */
|
1338 |
int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot, |
1339 |
int is_user, int is_softmmu) |
1340 |
{ |
1341 |
PageDesc *p; |
1342 |
target_ulong pd; |
1343 |
TranslationBlock *first_tb; |
1344 |
unsigned int index; |
1345 |
target_ulong address, addend; |
1346 |
int ret;
|
1347 |
|
1348 |
p = page_find(paddr >> TARGET_PAGE_BITS); |
1349 |
if (!p) {
|
1350 |
pd = IO_MEM_UNASSIGNED; |
1351 |
first_tb = NULL;
|
1352 |
} else {
|
1353 |
pd = p->phys_offset; |
1354 |
first_tb = p->first_tb; |
1355 |
} |
1356 |
#if defined(DEBUG_TLB)
|
1357 |
printf("tlb_set_page: vaddr=0x%08x paddr=0x%08x prot=%x u=%d c=%d smmu=%d pd=0x%08x\n",
|
1358 |
vaddr, paddr, prot, is_user, (first_tb != NULL), is_softmmu, pd);
|
1359 |
#endif
|
1360 |
|
1361 |
ret = 0;
|
1362 |
#if !defined(CONFIG_SOFTMMU)
|
1363 |
if (is_softmmu)
|
1364 |
#endif
|
1365 |
{ |
1366 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
|
1367 |
/* IO memory case */
|
1368 |
address = vaddr | pd; |
1369 |
addend = paddr; |
1370 |
} else {
|
1371 |
/* standard memory */
|
1372 |
address = vaddr; |
1373 |
addend = (unsigned long)phys_ram_base + (pd & TARGET_PAGE_MASK); |
1374 |
} |
1375 |
|
1376 |
index = (vaddr >> 12) & (CPU_TLB_SIZE - 1); |
1377 |
addend -= vaddr; |
1378 |
if (prot & PAGE_READ) {
|
1379 |
env->tlb_read[is_user][index].address = address; |
1380 |
env->tlb_read[is_user][index].addend = addend; |
1381 |
} else {
|
1382 |
env->tlb_read[is_user][index].address = -1;
|
1383 |
env->tlb_read[is_user][index].addend = -1;
|
1384 |
} |
1385 |
if (prot & PAGE_WRITE) {
|
1386 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM) {
|
1387 |
/* ROM: access is ignored (same as unassigned) */
|
1388 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_ROM; |
1389 |
env->tlb_write[is_user][index].addend = addend; |
1390 |
} else if (first_tb) { |
1391 |
/* if code is present, we use a specific memory
|
1392 |
handler. It works only for physical memory access */
|
1393 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_CODE; |
1394 |
env->tlb_write[is_user][index].addend = addend; |
1395 |
} else if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM && |
1396 |
!cpu_physical_memory_is_dirty(pd)) { |
1397 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_NOTDIRTY; |
1398 |
env->tlb_write[is_user][index].addend = addend; |
1399 |
} else {
|
1400 |
env->tlb_write[is_user][index].address = address; |
1401 |
env->tlb_write[is_user][index].addend = addend; |
1402 |
} |
1403 |
} else {
|
1404 |
env->tlb_write[is_user][index].address = -1;
|
1405 |
env->tlb_write[is_user][index].addend = -1;
|
1406 |
} |
1407 |
} |
1408 |
#if !defined(CONFIG_SOFTMMU)
|
1409 |
else {
|
1410 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
|
1411 |
/* IO access: no mapping is done as it will be handled by the
|
1412 |
soft MMU */
|
1413 |
if (!(env->hflags & HF_SOFTMMU_MASK))
|
1414 |
ret = 2;
|
1415 |
} else {
|
1416 |
void *map_addr;
|
1417 |
|
1418 |
if (vaddr >= MMAP_AREA_END) {
|
1419 |
ret = 2;
|
1420 |
} else {
|
1421 |
if (prot & PROT_WRITE) {
|
1422 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM ||
|
1423 |
first_tb || |
1424 |
((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM && |
1425 |
!cpu_physical_memory_is_dirty(pd))) { |
1426 |
/* ROM: we do as if code was inside */
|
1427 |
/* if code is present, we only map as read only and save the
|
1428 |
original mapping */
|
1429 |
VirtPageDesc *vp; |
1430 |
|
1431 |
vp = virt_page_find_alloc(vaddr >> TARGET_PAGE_BITS); |
1432 |
vp->phys_addr = pd; |
1433 |
vp->prot = prot; |
1434 |
vp->valid_tag = virt_valid_tag; |
1435 |
prot &= ~PAGE_WRITE; |
1436 |
} |
1437 |
} |
1438 |
map_addr = mmap((void *)vaddr, TARGET_PAGE_SIZE, prot,
|
1439 |
MAP_SHARED | MAP_FIXED, phys_ram_fd, (pd & TARGET_PAGE_MASK)); |
1440 |
if (map_addr == MAP_FAILED) {
|
1441 |
cpu_abort(env, "mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
|
1442 |
paddr, vaddr); |
1443 |
} |
1444 |
} |
1445 |
} |
1446 |
} |
1447 |
#endif
|
1448 |
return ret;
|
1449 |
} |
1450 |
|
1451 |
/* called from signal handler: invalidate the code and unprotect the
|
1452 |
page. Return TRUE if the fault was succesfully handled. */
|
1453 |
int page_unprotect(unsigned long addr) |
1454 |
{ |
1455 |
#if !defined(CONFIG_SOFTMMU)
|
1456 |
VirtPageDesc *vp; |
1457 |
|
1458 |
#if defined(DEBUG_TLB)
|
1459 |
printf("page_unprotect: addr=0x%08x\n", addr);
|
1460 |
#endif
|
1461 |
addr &= TARGET_PAGE_MASK; |
1462 |
|
1463 |
/* if it is not mapped, no need to worry here */
|
1464 |
if (addr >= MMAP_AREA_END)
|
1465 |
return 0; |
1466 |
vp = virt_page_find(addr >> TARGET_PAGE_BITS); |
1467 |
if (!vp)
|
1468 |
return 0; |
1469 |
/* NOTE: in this case, validate_tag is _not_ tested as it
|
1470 |
validates only the code TLB */
|
1471 |
if (vp->valid_tag != virt_valid_tag)
|
1472 |
return 0; |
1473 |
if (!(vp->prot & PAGE_WRITE))
|
1474 |
return 0; |
1475 |
#if defined(DEBUG_TLB)
|
1476 |
printf("page_unprotect: addr=0x%08x phys_addr=0x%08x prot=%x\n",
|
1477 |
addr, vp->phys_addr, vp->prot); |
1478 |
#endif
|
1479 |
/* set the dirty bit */
|
1480 |
phys_ram_dirty[vp->phys_addr >> TARGET_PAGE_BITS] = 1;
|
1481 |
/* flush the code inside */
|
1482 |
tb_invalidate_phys_page(vp->phys_addr); |
1483 |
if (mprotect((void *)addr, TARGET_PAGE_SIZE, vp->prot) < 0) |
1484 |
cpu_abort(cpu_single_env, "error mprotect addr=0x%lx prot=%d\n",
|
1485 |
(unsigned long)addr, vp->prot); |
1486 |
return 1; |
1487 |
#else
|
1488 |
return 0; |
1489 |
#endif
|
1490 |
} |
1491 |
|
1492 |
#else
|
1493 |
|
1494 |
void tlb_flush(CPUState *env, int flush_global) |
1495 |
{ |
1496 |
} |
1497 |
|
1498 |
void tlb_flush_page(CPUState *env, uint32_t addr)
|
1499 |
{ |
1500 |
} |
1501 |
|
1502 |
void tlb_flush_page_write(CPUState *env, uint32_t addr)
|
1503 |
{ |
1504 |
} |
1505 |
|
1506 |
int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot, |
1507 |
int is_user, int is_softmmu) |
1508 |
{ |
1509 |
return 0; |
1510 |
} |
1511 |
|
1512 |
/* dump memory mappings */
|
1513 |
void page_dump(FILE *f)
|
1514 |
{ |
1515 |
unsigned long start, end; |
1516 |
int i, j, prot, prot1;
|
1517 |
PageDesc *p; |
1518 |
|
1519 |
fprintf(f, "%-8s %-8s %-8s %s\n",
|
1520 |
"start", "end", "size", "prot"); |
1521 |
start = -1;
|
1522 |
end = -1;
|
1523 |
prot = 0;
|
1524 |
for(i = 0; i <= L1_SIZE; i++) { |
1525 |
if (i < L1_SIZE)
|
1526 |
p = l1_map[i]; |
1527 |
else
|
1528 |
p = NULL;
|
1529 |
for(j = 0;j < L2_SIZE; j++) { |
1530 |
if (!p)
|
1531 |
prot1 = 0;
|
1532 |
else
|
1533 |
prot1 = p[j].flags; |
1534 |
if (prot1 != prot) {
|
1535 |
end = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS);
|
1536 |
if (start != -1) { |
1537 |
fprintf(f, "%08lx-%08lx %08lx %c%c%c\n",
|
1538 |
start, end, end - start, |
1539 |
prot & PAGE_READ ? 'r' : '-', |
1540 |
prot & PAGE_WRITE ? 'w' : '-', |
1541 |
prot & PAGE_EXEC ? 'x' : '-'); |
1542 |
} |
1543 |
if (prot1 != 0) |
1544 |
start = end; |
1545 |
else
|
1546 |
start = -1;
|
1547 |
prot = prot1; |
1548 |
} |
1549 |
if (!p)
|
1550 |
break;
|
1551 |
} |
1552 |
} |
1553 |
} |
1554 |
|
1555 |
int page_get_flags(unsigned long address) |
1556 |
{ |
1557 |
PageDesc *p; |
1558 |
|
1559 |
p = page_find(address >> TARGET_PAGE_BITS); |
1560 |
if (!p)
|
1561 |
return 0; |
1562 |
return p->flags;
|
1563 |
} |
1564 |
|
1565 |
/* modify the flags of a page and invalidate the code if
|
1566 |
necessary. The flag PAGE_WRITE_ORG is positionned automatically
|
1567 |
depending on PAGE_WRITE */
|
1568 |
void page_set_flags(unsigned long start, unsigned long end, int flags) |
1569 |
{ |
1570 |
PageDesc *p; |
1571 |
unsigned long addr; |
1572 |
|
1573 |
start = start & TARGET_PAGE_MASK; |
1574 |
end = TARGET_PAGE_ALIGN(end); |
1575 |
if (flags & PAGE_WRITE)
|
1576 |
flags |= PAGE_WRITE_ORG; |
1577 |
spin_lock(&tb_lock); |
1578 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
1579 |
p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
1580 |
/* if the write protection is set, then we invalidate the code
|
1581 |
inside */
|
1582 |
if (!(p->flags & PAGE_WRITE) &&
|
1583 |
(flags & PAGE_WRITE) && |
1584 |
p->first_tb) { |
1585 |
tb_invalidate_phys_page(addr); |
1586 |
} |
1587 |
p->flags = flags; |
1588 |
} |
1589 |
spin_unlock(&tb_lock); |
1590 |
} |
1591 |
|
1592 |
/* called from signal handler: invalidate the code and unprotect the
|
1593 |
page. Return TRUE if the fault was succesfully handled. */
|
1594 |
int page_unprotect(unsigned long address) |
1595 |
{ |
1596 |
unsigned int page_index, prot, pindex; |
1597 |
PageDesc *p, *p1; |
1598 |
unsigned long host_start, host_end, addr; |
1599 |
|
1600 |
host_start = address & host_page_mask; |
1601 |
page_index = host_start >> TARGET_PAGE_BITS; |
1602 |
p1 = page_find(page_index); |
1603 |
if (!p1)
|
1604 |
return 0; |
1605 |
host_end = host_start + host_page_size; |
1606 |
p = p1; |
1607 |
prot = 0;
|
1608 |
for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) {
|
1609 |
prot |= p->flags; |
1610 |
p++; |
1611 |
} |
1612 |
/* if the page was really writable, then we change its
|
1613 |
protection back to writable */
|
1614 |
if (prot & PAGE_WRITE_ORG) {
|
1615 |
pindex = (address - host_start) >> TARGET_PAGE_BITS; |
1616 |
if (!(p1[pindex].flags & PAGE_WRITE)) {
|
1617 |
mprotect((void *)host_start, host_page_size,
|
1618 |
(prot & PAGE_BITS) | PAGE_WRITE); |
1619 |
p1[pindex].flags |= PAGE_WRITE; |
1620 |
/* and since the content will be modified, we must invalidate
|
1621 |
the corresponding translated code. */
|
1622 |
tb_invalidate_phys_page(address); |
1623 |
#ifdef DEBUG_TB_CHECK
|
1624 |
tb_invalidate_check(address); |
1625 |
#endif
|
1626 |
return 1; |
1627 |
} |
1628 |
} |
1629 |
return 0; |
1630 |
} |
1631 |
|
1632 |
/* call this function when system calls directly modify a memory area */
|
1633 |
void page_unprotect_range(uint8_t *data, unsigned long data_size) |
1634 |
{ |
1635 |
unsigned long start, end, addr; |
1636 |
|
1637 |
start = (unsigned long)data; |
1638 |
end = start + data_size; |
1639 |
start &= TARGET_PAGE_MASK; |
1640 |
end = TARGET_PAGE_ALIGN(end); |
1641 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
1642 |
page_unprotect(addr); |
1643 |
} |
1644 |
} |
1645 |
|
1646 |
static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr) |
1647 |
{ |
1648 |
} |
1649 |
|
1650 |
#endif /* defined(CONFIG_USER_ONLY) */ |
1651 |
|
1652 |
/* register physical memory. 'size' must be a multiple of the target
|
1653 |
page size. If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
|
1654 |
io memory page */
|
1655 |
void cpu_register_physical_memory(unsigned long start_addr, unsigned long size, |
1656 |
long phys_offset)
|
1657 |
{ |
1658 |
unsigned long addr, end_addr; |
1659 |
PageDesc *p; |
1660 |
|
1661 |
end_addr = start_addr + size; |
1662 |
for(addr = start_addr; addr < end_addr; addr += TARGET_PAGE_SIZE) {
|
1663 |
p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
1664 |
p->phys_offset = phys_offset; |
1665 |
if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM)
|
1666 |
phys_offset += TARGET_PAGE_SIZE; |
1667 |
} |
1668 |
} |
1669 |
|
1670 |
static uint32_t unassigned_mem_readb(uint32_t addr)
|
1671 |
{ |
1672 |
return 0; |
1673 |
} |
1674 |
|
1675 |
static void unassigned_mem_writeb(uint32_t addr, uint32_t val, uint32_t vaddr) |
1676 |
{ |
1677 |
} |
1678 |
|
1679 |
static CPUReadMemoryFunc *unassigned_mem_read[3] = { |
1680 |
unassigned_mem_readb, |
1681 |
unassigned_mem_readb, |
1682 |
unassigned_mem_readb, |
1683 |
}; |
1684 |
|
1685 |
static CPUWriteMemoryFunc *unassigned_mem_write[3] = { |
1686 |
unassigned_mem_writeb, |
1687 |
unassigned_mem_writeb, |
1688 |
unassigned_mem_writeb, |
1689 |
}; |
1690 |
|
1691 |
/* self modifying code support in soft mmu mode : writing to a page
|
1692 |
containing code comes to these functions */
|
1693 |
|
1694 |
static void code_mem_writeb(uint32_t addr, uint32_t val, uint32_t vaddr) |
1695 |
{ |
1696 |
unsigned long phys_addr; |
1697 |
|
1698 |
phys_addr = addr - (long)phys_ram_base;
|
1699 |
#if !defined(CONFIG_USER_ONLY)
|
1700 |
tb_invalidate_phys_page_fast(phys_addr, 1, vaddr);
|
1701 |
#endif
|
1702 |
stb_raw((uint8_t *)addr, val); |
1703 |
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
1704 |
} |
1705 |
|
1706 |
static void code_mem_writew(uint32_t addr, uint32_t val, uint32_t vaddr) |
1707 |
{ |
1708 |
unsigned long phys_addr; |
1709 |
|
1710 |
phys_addr = addr - (long)phys_ram_base;
|
1711 |
#if !defined(CONFIG_USER_ONLY)
|
1712 |
tb_invalidate_phys_page_fast(phys_addr, 2, vaddr);
|
1713 |
#endif
|
1714 |
stw_raw((uint8_t *)addr, val); |
1715 |
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
1716 |
} |
1717 |
|
1718 |
static void code_mem_writel(uint32_t addr, uint32_t val, uint32_t vaddr) |
1719 |
{ |
1720 |
unsigned long phys_addr; |
1721 |
|
1722 |
phys_addr = addr - (long)phys_ram_base;
|
1723 |
#if !defined(CONFIG_USER_ONLY)
|
1724 |
tb_invalidate_phys_page_fast(phys_addr, 4, vaddr);
|
1725 |
#endif
|
1726 |
stl_raw((uint8_t *)addr, val); |
1727 |
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
1728 |
} |
1729 |
|
1730 |
static CPUReadMemoryFunc *code_mem_read[3] = { |
1731 |
NULL, /* never used */ |
1732 |
NULL, /* never used */ |
1733 |
NULL, /* never used */ |
1734 |
}; |
1735 |
|
1736 |
static CPUWriteMemoryFunc *code_mem_write[3] = { |
1737 |
code_mem_writeb, |
1738 |
code_mem_writew, |
1739 |
code_mem_writel, |
1740 |
}; |
1741 |
|
1742 |
static void notdirty_mem_writeb(uint32_t addr, uint32_t val, uint32_t vaddr) |
1743 |
{ |
1744 |
stb_raw((uint8_t *)addr, val); |
1745 |
tlb_set_dirty(addr, vaddr); |
1746 |
} |
1747 |
|
1748 |
static void notdirty_mem_writew(uint32_t addr, uint32_t val, uint32_t vaddr) |
1749 |
{ |
1750 |
stw_raw((uint8_t *)addr, val); |
1751 |
tlb_set_dirty(addr, vaddr); |
1752 |
} |
1753 |
|
1754 |
static void notdirty_mem_writel(uint32_t addr, uint32_t val, uint32_t vaddr) |
1755 |
{ |
1756 |
stl_raw((uint8_t *)addr, val); |
1757 |
tlb_set_dirty(addr, vaddr); |
1758 |
} |
1759 |
|
1760 |
static CPUWriteMemoryFunc *notdirty_mem_write[3] = { |
1761 |
notdirty_mem_writeb, |
1762 |
notdirty_mem_writew, |
1763 |
notdirty_mem_writel, |
1764 |
}; |
1765 |
|
1766 |
static void io_mem_init(void) |
1767 |
{ |
1768 |
cpu_register_io_memory(IO_MEM_ROM >> IO_MEM_SHIFT, code_mem_read, unassigned_mem_write); |
1769 |
cpu_register_io_memory(IO_MEM_UNASSIGNED >> IO_MEM_SHIFT, unassigned_mem_read, unassigned_mem_write); |
1770 |
cpu_register_io_memory(IO_MEM_CODE >> IO_MEM_SHIFT, code_mem_read, code_mem_write); |
1771 |
cpu_register_io_memory(IO_MEM_NOTDIRTY >> IO_MEM_SHIFT, code_mem_read, notdirty_mem_write); |
1772 |
io_mem_nb = 5;
|
1773 |
|
1774 |
/* alloc dirty bits array */
|
1775 |
phys_ram_dirty = qemu_malloc(phys_ram_size >> TARGET_PAGE_BITS); |
1776 |
} |
1777 |
|
1778 |
/* mem_read and mem_write are arrays of functions containing the
|
1779 |
function to access byte (index 0), word (index 1) and dword (index
|
1780 |
2). All functions must be supplied. If io_index is non zero, the
|
1781 |
corresponding io zone is modified. If it is zero, a new io zone is
|
1782 |
allocated. The return value can be used with
|
1783 |
cpu_register_physical_memory(). (-1) is returned if error. */
|
1784 |
int cpu_register_io_memory(int io_index, |
1785 |
CPUReadMemoryFunc **mem_read, |
1786 |
CPUWriteMemoryFunc **mem_write) |
1787 |
{ |
1788 |
int i;
|
1789 |
|
1790 |
if (io_index <= 0) { |
1791 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
1792 |
return -1; |
1793 |
io_index = io_mem_nb++; |
1794 |
} else {
|
1795 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
1796 |
return -1; |
1797 |
} |
1798 |
|
1799 |
for(i = 0;i < 3; i++) { |
1800 |
io_mem_read[io_index][i] = mem_read[i]; |
1801 |
io_mem_write[io_index][i] = mem_write[i]; |
1802 |
} |
1803 |
return io_index << IO_MEM_SHIFT;
|
1804 |
} |
1805 |
|
1806 |
/* physical memory access (slow version, mainly for debug) */
|
1807 |
#if defined(CONFIG_USER_ONLY)
|
1808 |
void cpu_physical_memory_rw(target_ulong addr, uint8_t *buf,
|
1809 |
int len, int is_write) |
1810 |
{ |
1811 |
int l, flags;
|
1812 |
target_ulong page; |
1813 |
|
1814 |
while (len > 0) { |
1815 |
page = addr & TARGET_PAGE_MASK; |
1816 |
l = (page + TARGET_PAGE_SIZE) - addr; |
1817 |
if (l > len)
|
1818 |
l = len; |
1819 |
flags = page_get_flags(page); |
1820 |
if (!(flags & PAGE_VALID))
|
1821 |
return;
|
1822 |
if (is_write) {
|
1823 |
if (!(flags & PAGE_WRITE))
|
1824 |
return;
|
1825 |
memcpy((uint8_t *)addr, buf, len); |
1826 |
} else {
|
1827 |
if (!(flags & PAGE_READ))
|
1828 |
return;
|
1829 |
memcpy(buf, (uint8_t *)addr, len); |
1830 |
} |
1831 |
len -= l; |
1832 |
buf += l; |
1833 |
addr += l; |
1834 |
} |
1835 |
} |
1836 |
#else
|
1837 |
void cpu_physical_memory_rw(target_ulong addr, uint8_t *buf,
|
1838 |
int len, int is_write) |
1839 |
{ |
1840 |
int l, io_index;
|
1841 |
uint8_t *ptr; |
1842 |
uint32_t val; |
1843 |
target_ulong page, pd; |
1844 |
PageDesc *p; |
1845 |
|
1846 |
while (len > 0) { |
1847 |
page = addr & TARGET_PAGE_MASK; |
1848 |
l = (page + TARGET_PAGE_SIZE) - addr; |
1849 |
if (l > len)
|
1850 |
l = len; |
1851 |
p = page_find(page >> TARGET_PAGE_BITS); |
1852 |
if (!p) {
|
1853 |
pd = IO_MEM_UNASSIGNED; |
1854 |
} else {
|
1855 |
pd = p->phys_offset; |
1856 |
} |
1857 |
|
1858 |
if (is_write) {
|
1859 |
if ((pd & ~TARGET_PAGE_MASK) != 0) { |
1860 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
1861 |
if (l >= 4 && ((addr & 3) == 0)) { |
1862 |
/* 32 bit read access */
|
1863 |
val = ldl_raw(buf); |
1864 |
io_mem_write[io_index][2](addr, val, 0); |
1865 |
l = 4;
|
1866 |
} else if (l >= 2 && ((addr & 1) == 0)) { |
1867 |
/* 16 bit read access */
|
1868 |
val = lduw_raw(buf); |
1869 |
io_mem_write[io_index][1](addr, val, 0); |
1870 |
l = 2;
|
1871 |
} else {
|
1872 |
/* 8 bit access */
|
1873 |
val = ldub_raw(buf); |
1874 |
io_mem_write[io_index][0](addr, val, 0); |
1875 |
l = 1;
|
1876 |
} |
1877 |
} else {
|
1878 |
unsigned long addr1; |
1879 |
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
1880 |
/* RAM case */
|
1881 |
ptr = phys_ram_base + addr1; |
1882 |
memcpy(ptr, buf, l); |
1883 |
/* invalidate code */
|
1884 |
tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
|
1885 |
/* set dirty bit */
|
1886 |
phys_ram_dirty[page >> TARGET_PAGE_BITS] = 1;
|
1887 |
} |
1888 |
} else {
|
1889 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
1890 |
(pd & ~TARGET_PAGE_MASK) != IO_MEM_CODE) { |
1891 |
/* I/O case */
|
1892 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
1893 |
if (l >= 4 && ((addr & 3) == 0)) { |
1894 |
/* 32 bit read access */
|
1895 |
val = io_mem_read[io_index][2](addr);
|
1896 |
stl_raw(buf, val); |
1897 |
l = 4;
|
1898 |
} else if (l >= 2 && ((addr & 1) == 0)) { |
1899 |
/* 16 bit read access */
|
1900 |
val = io_mem_read[io_index][1](addr);
|
1901 |
stw_raw(buf, val); |
1902 |
l = 2;
|
1903 |
} else {
|
1904 |
/* 8 bit access */
|
1905 |
val = io_mem_read[io_index][0](addr);
|
1906 |
stb_raw(buf, val); |
1907 |
l = 1;
|
1908 |
} |
1909 |
} else {
|
1910 |
/* RAM case */
|
1911 |
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) + |
1912 |
(addr & ~TARGET_PAGE_MASK); |
1913 |
memcpy(buf, ptr, l); |
1914 |
} |
1915 |
} |
1916 |
len -= l; |
1917 |
buf += l; |
1918 |
addr += l; |
1919 |
} |
1920 |
} |
1921 |
#endif
|
1922 |
|
1923 |
/* virtual memory access for debug */
|
1924 |
int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
|
1925 |
uint8_t *buf, int len, int is_write) |
1926 |
{ |
1927 |
int l;
|
1928 |
target_ulong page, phys_addr; |
1929 |
|
1930 |
while (len > 0) { |
1931 |
page = addr & TARGET_PAGE_MASK; |
1932 |
phys_addr = cpu_get_phys_page_debug(env, page); |
1933 |
/* if no physical page mapped, return an error */
|
1934 |
if (phys_addr == -1) |
1935 |
return -1; |
1936 |
l = (page + TARGET_PAGE_SIZE) - addr; |
1937 |
if (l > len)
|
1938 |
l = len; |
1939 |
cpu_physical_memory_rw(phys_addr + (addr & ~TARGET_PAGE_MASK), |
1940 |
buf, l, is_write); |
1941 |
len -= l; |
1942 |
buf += l; |
1943 |
addr += l; |
1944 |
} |
1945 |
return 0; |
1946 |
} |
1947 |
|
1948 |
#if !defined(CONFIG_USER_ONLY)
|
1949 |
|
1950 |
#define MMUSUFFIX _cmmu
|
1951 |
#define GETPC() NULL |
1952 |
#define env cpu_single_env
|
1953 |
|
1954 |
#define SHIFT 0 |
1955 |
#include "softmmu_template.h" |
1956 |
|
1957 |
#define SHIFT 1 |
1958 |
#include "softmmu_template.h" |
1959 |
|
1960 |
#define SHIFT 2 |
1961 |
#include "softmmu_template.h" |
1962 |
|
1963 |
#define SHIFT 3 |
1964 |
#include "softmmu_template.h" |
1965 |
|
1966 |
#undef env
|
1967 |
|
1968 |
#endif
|