git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@619 c046a42c-6fe2-441c-8c8c-71466251a162
1898 lines
54 KiB
C
1898 lines
54 KiB
C
/*
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* virtual page mapping and translated block handling
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include <sys/mman.h>
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#include "config.h"
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#include "cpu.h"
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#include "exec-all.h"
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//#define DEBUG_TB_INVALIDATE
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//#define DEBUG_FLUSH
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//#define DEBUG_TLB
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/* make various TB consistency checks */
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//#define DEBUG_TB_CHECK
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//#define DEBUG_TLB_CHECK
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/* threshold to flush the translated code buffer */
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#define CODE_GEN_BUFFER_MAX_SIZE (CODE_GEN_BUFFER_SIZE - CODE_GEN_MAX_SIZE)
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#define SMC_BITMAP_USE_THRESHOLD 10
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#define MMAP_AREA_START 0x00000000
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#define MMAP_AREA_END 0xa8000000
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TranslationBlock tbs[CODE_GEN_MAX_BLOCKS];
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TranslationBlock *tb_hash[CODE_GEN_HASH_SIZE];
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TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
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int nb_tbs;
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/* any access to the tbs or the page table must use this lock */
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spinlock_t tb_lock = SPIN_LOCK_UNLOCKED;
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uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE];
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uint8_t *code_gen_ptr;
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int phys_ram_size;
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int phys_ram_fd;
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uint8_t *phys_ram_base;
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uint8_t *phys_ram_dirty;
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typedef struct PageDesc {
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/* offset in memory of the page + io_index in the low 12 bits */
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unsigned long phys_offset;
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/* list of TBs intersecting this physical page */
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TranslationBlock *first_tb;
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/* in order to optimize self modifying code, we count the number
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of lookups we do to a given page to use a bitmap */
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unsigned int code_write_count;
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uint8_t *code_bitmap;
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#if defined(CONFIG_USER_ONLY)
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unsigned long flags;
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#endif
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} PageDesc;
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typedef struct VirtPageDesc {
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/* physical address of code page. It is valid only if 'valid_tag'
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matches 'virt_valid_tag' */
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target_ulong phys_addr;
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unsigned int valid_tag;
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#if !defined(CONFIG_SOFTMMU)
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/* original page access rights. It is valid only if 'valid_tag'
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matches 'virt_valid_tag' */
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unsigned int prot;
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#endif
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} VirtPageDesc;
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#define L2_BITS 10
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#define L1_BITS (32 - L2_BITS - TARGET_PAGE_BITS)
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#define L1_SIZE (1 << L1_BITS)
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#define L2_SIZE (1 << L2_BITS)
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static void io_mem_init(void);
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unsigned long real_host_page_size;
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unsigned long host_page_bits;
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unsigned long host_page_size;
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unsigned long host_page_mask;
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static PageDesc *l1_map[L1_SIZE];
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#if !defined(CONFIG_USER_ONLY)
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static VirtPageDesc *l1_virt_map[L1_SIZE];
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static unsigned int virt_valid_tag;
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#endif
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/* io memory support */
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CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
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CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
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static int io_mem_nb;
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/* log support */
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char *logfilename = "/tmp/qemu.log";
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FILE *logfile;
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int loglevel;
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static void page_init(void)
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{
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/* NOTE: we can always suppose that host_page_size >=
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TARGET_PAGE_SIZE */
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real_host_page_size = getpagesize();
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if (host_page_size == 0)
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host_page_size = real_host_page_size;
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if (host_page_size < TARGET_PAGE_SIZE)
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host_page_size = TARGET_PAGE_SIZE;
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host_page_bits = 0;
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while ((1 << host_page_bits) < host_page_size)
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host_page_bits++;
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host_page_mask = ~(host_page_size - 1);
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#if !defined(CONFIG_USER_ONLY)
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virt_valid_tag = 1;
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#endif
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}
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static inline PageDesc *page_find_alloc(unsigned int index)
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{
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PageDesc **lp, *p;
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lp = &l1_map[index >> L2_BITS];
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p = *lp;
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if (!p) {
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/* allocate if not found */
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p = qemu_malloc(sizeof(PageDesc) * L2_SIZE);
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memset(p, 0, sizeof(PageDesc) * L2_SIZE);
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*lp = p;
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}
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return p + (index & (L2_SIZE - 1));
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}
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static inline PageDesc *page_find(unsigned int index)
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{
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PageDesc *p;
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p = l1_map[index >> L2_BITS];
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if (!p)
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return 0;
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return p + (index & (L2_SIZE - 1));
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}
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#if !defined(CONFIG_USER_ONLY)
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static void tlb_protect_code(CPUState *env, uint32_t addr);
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static void tlb_unprotect_code(CPUState *env, uint32_t addr);
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static void tlb_unprotect_code_phys(CPUState *env, uint32_t phys_addr, target_ulong vaddr);
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static inline VirtPageDesc *virt_page_find_alloc(unsigned int index)
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{
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VirtPageDesc **lp, *p;
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lp = &l1_virt_map[index >> L2_BITS];
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p = *lp;
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if (!p) {
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/* allocate if not found */
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p = qemu_malloc(sizeof(VirtPageDesc) * L2_SIZE);
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memset(p, 0, sizeof(VirtPageDesc) * L2_SIZE);
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*lp = p;
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}
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return p + (index & (L2_SIZE - 1));
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}
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static inline VirtPageDesc *virt_page_find(unsigned int index)
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{
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VirtPageDesc *p;
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p = l1_virt_map[index >> L2_BITS];
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if (!p)
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return 0;
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return p + (index & (L2_SIZE - 1));
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}
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static void virt_page_flush(void)
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{
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int i, j;
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VirtPageDesc *p;
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virt_valid_tag++;
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if (virt_valid_tag == 0) {
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virt_valid_tag = 1;
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for(i = 0; i < L1_SIZE; i++) {
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p = l1_virt_map[i];
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if (p) {
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for(j = 0; j < L2_SIZE; j++)
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p[j].valid_tag = 0;
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}
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}
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}
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}
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#else
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static void virt_page_flush(void)
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{
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}
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#endif
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void cpu_exec_init(void)
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{
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if (!code_gen_ptr) {
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code_gen_ptr = code_gen_buffer;
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page_init();
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io_mem_init();
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}
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}
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static inline void invalidate_page_bitmap(PageDesc *p)
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{
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if (p->code_bitmap) {
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qemu_free(p->code_bitmap);
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p->code_bitmap = NULL;
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}
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p->code_write_count = 0;
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}
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/* set to NULL all the 'first_tb' fields in all PageDescs */
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static void page_flush_tb(void)
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{
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int i, j;
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PageDesc *p;
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for(i = 0; i < L1_SIZE; i++) {
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p = l1_map[i];
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if (p) {
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for(j = 0; j < L2_SIZE; j++) {
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p->first_tb = NULL;
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invalidate_page_bitmap(p);
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p++;
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}
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}
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}
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}
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/* flush all the translation blocks */
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/* XXX: tb_flush is currently not thread safe */
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void tb_flush(CPUState *env)
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{
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int i;
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#if defined(DEBUG_FLUSH)
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printf("qemu: flush code_size=%d nb_tbs=%d avg_tb_size=%d\n",
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code_gen_ptr - code_gen_buffer,
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nb_tbs,
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nb_tbs > 0 ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0);
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#endif
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nb_tbs = 0;
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for(i = 0;i < CODE_GEN_HASH_SIZE; i++)
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tb_hash[i] = NULL;
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virt_page_flush();
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for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++)
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tb_phys_hash[i] = NULL;
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page_flush_tb();
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code_gen_ptr = code_gen_buffer;
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/* XXX: flush processor icache at this point if cache flush is
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expensive */
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}
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#ifdef DEBUG_TB_CHECK
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static void tb_invalidate_check(unsigned long address)
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{
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TranslationBlock *tb;
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int i;
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address &= TARGET_PAGE_MASK;
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for(i = 0;i < CODE_GEN_HASH_SIZE; i++) {
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for(tb = tb_hash[i]; tb != NULL; tb = tb->hash_next) {
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if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
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address >= tb->pc + tb->size)) {
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printf("ERROR invalidate: address=%08lx PC=%08lx size=%04x\n",
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address, tb->pc, tb->size);
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}
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}
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}
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}
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/* verify that all the pages have correct rights for code */
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static void tb_page_check(void)
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{
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TranslationBlock *tb;
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int i, flags1, flags2;
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for(i = 0;i < CODE_GEN_HASH_SIZE; i++) {
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for(tb = tb_hash[i]; tb != NULL; tb = tb->hash_next) {
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flags1 = page_get_flags(tb->pc);
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flags2 = page_get_flags(tb->pc + tb->size - 1);
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if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
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printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
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tb->pc, tb->size, flags1, flags2);
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}
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}
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}
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}
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void tb_jmp_check(TranslationBlock *tb)
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{
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TranslationBlock *tb1;
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unsigned int n1;
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/* suppress any remaining jumps to this TB */
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tb1 = tb->jmp_first;
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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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#endif
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/* invalidate one TB */
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static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb,
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int next_offset)
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{
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TranslationBlock *tb1;
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for(;;) {
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tb1 = *ptb;
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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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}
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static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb)
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{
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TranslationBlock *tb1;
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unsigned int n1;
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for(;;) {
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tb1 = *ptb;
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n1 = (long)tb1 & 3;
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tb1 = (TranslationBlock *)((long)tb1 & ~3);
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if (tb1 == tb) {
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*ptb = tb1->page_next[n1];
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break;
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}
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ptb = &tb1->page_next[n1];
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}
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}
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static inline void tb_jmp_remove(TranslationBlock *tb, int n)
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{
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TranslationBlock *tb1, **ptb;
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unsigned int n1;
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ptb = &tb->jmp_next[n];
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tb1 = *ptb;
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if (tb1) {
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/* find tb(n) in circular list */
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for(;;) {
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tb1 = *ptb;
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n1 = (long)tb1 & 3;
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tb1 = (TranslationBlock *)((long)tb1 & ~3);
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if (n1 == n && tb1 == tb)
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break;
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if (n1 == 2) {
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ptb = &tb1->jmp_first;
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} else {
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ptb = &tb1->jmp_next[n1];
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}
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}
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/* now we can suppress tb(n) from the list */
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*ptb = tb->jmp_next[n];
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tb->jmp_next[n] = NULL;
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}
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}
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/* reset the jump entry 'n' of a TB so that it is not chained to
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another TB */
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static inline void tb_reset_jump(TranslationBlock *tb, int n)
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{
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tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n]));
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}
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static inline void tb_invalidate(TranslationBlock *tb)
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{
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unsigned int h, n1;
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TranslationBlock *tb1, *tb2, **ptb;
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tb_invalidated_flag = 1;
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/* remove the TB from the hash list */
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h = tb_hash_func(tb->pc);
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ptb = &tb_hash[h];
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for(;;) {
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tb1 = *ptb;
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/* NOTE: the TB is not necessarily linked in the hash. It
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indicates that it is not currently used */
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if (tb1 == NULL)
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return;
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if (tb1 == tb) {
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*ptb = tb1->hash_next;
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break;
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}
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ptb = &tb1->hash_next;
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}
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/* suppress this TB from the two jump lists */
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tb_jmp_remove(tb, 0);
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tb_jmp_remove(tb, 1);
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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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if (n1 == 2)
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break;
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tb1 = (TranslationBlock *)((long)tb1 & ~3);
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tb2 = tb1->jmp_next[n1];
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tb_reset_jump(tb1, n1);
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tb1->jmp_next[n1] = NULL;
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tb1 = tb2;
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}
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tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */
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}
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static inline void tb_phys_invalidate(TranslationBlock *tb, unsigned int page_addr)
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{
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PageDesc *p;
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unsigned int h;
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target_ulong phys_pc;
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/* remove the TB from the hash list */
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phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
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h = tb_phys_hash_func(phys_pc);
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tb_remove(&tb_phys_hash[h], tb,
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offsetof(TranslationBlock, phys_hash_next));
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/* remove the TB from the page list */
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if (tb->page_addr[0] != page_addr) {
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p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
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tb_page_remove(&p->first_tb, tb);
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invalidate_page_bitmap(p);
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}
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if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) {
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p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
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tb_page_remove(&p->first_tb, tb);
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invalidate_page_bitmap(p);
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}
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tb_invalidate(tb);
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}
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static inline void set_bits(uint8_t *tab, int start, int len)
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{
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int end, mask, end1;
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end = start + len;
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tab += start >> 3;
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mask = 0xff << (start & 7);
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if ((start & ~7) == (end & ~7)) {
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if (start < end) {
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mask &= ~(0xff << (end & 7));
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*tab |= mask;
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}
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} else {
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*tab++ |= mask;
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start = (start + 8) & ~7;
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end1 = end & ~7;
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while (start < end1) {
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*tab++ = 0xff;
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start += 8;
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}
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if (start < end) {
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mask = ~(0xff << (end & 7));
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*tab |= mask;
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}
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}
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}
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static void build_page_bitmap(PageDesc *p)
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{
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int n, tb_start, tb_end;
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TranslationBlock *tb;
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p->code_bitmap = qemu_malloc(TARGET_PAGE_SIZE / 8);
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if (!p->code_bitmap)
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return;
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memset(p->code_bitmap, 0, TARGET_PAGE_SIZE / 8);
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tb = p->first_tb;
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while (tb != NULL) {
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n = (long)tb & 3;
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tb = (TranslationBlock *)((long)tb & ~3);
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/* NOTE: this is subtle as a TB may span two physical pages */
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if (n == 0) {
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/* NOTE: tb_end may be after the end of the page, but
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it is not a problem */
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tb_start = tb->pc & ~TARGET_PAGE_MASK;
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tb_end = tb_start + tb->size;
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if (tb_end > TARGET_PAGE_SIZE)
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tb_end = TARGET_PAGE_SIZE;
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} else {
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tb_start = 0;
|
|
tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK);
|
|
}
|
|
set_bits(p->code_bitmap, tb_start, tb_end - tb_start);
|
|
tb = tb->page_next[n];
|
|
}
|
|
}
|
|
|
|
/* invalidate all TBs which intersect with the target physical page
|
|
starting in range [start;end[. NOTE: start and end must refer to
|
|
the same physical page. 'vaddr' is a virtual address referencing
|
|
the physical page of code. It is only used an a hint if there is no
|
|
code left. */
|
|
static void tb_invalidate_phys_page_range(target_ulong start, target_ulong end,
|
|
target_ulong vaddr)
|
|
{
|
|
int n;
|
|
PageDesc *p;
|
|
TranslationBlock *tb, *tb_next;
|
|
target_ulong tb_start, tb_end;
|
|
|
|
p = page_find(start >> TARGET_PAGE_BITS);
|
|
if (!p)
|
|
return;
|
|
if (!p->code_bitmap &&
|
|
++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD) {
|
|
/* build code bitmap */
|
|
build_page_bitmap(p);
|
|
}
|
|
|
|
/* we remove all the TBs in the range [start, end[ */
|
|
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
|
tb = p->first_tb;
|
|
while (tb != NULL) {
|
|
n = (long)tb & 3;
|
|
tb = (TranslationBlock *)((long)tb & ~3);
|
|
tb_next = tb->page_next[n];
|
|
/* NOTE: this is subtle as a TB may span two physical pages */
|
|
if (n == 0) {
|
|
/* NOTE: tb_end may be after the end of the page, but
|
|
it is not a problem */
|
|
tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
|
tb_end = tb_start + tb->size;
|
|
} else {
|
|
tb_start = tb->page_addr[1];
|
|
tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK);
|
|
}
|
|
if (!(tb_end <= start || tb_start >= end)) {
|
|
tb_phys_invalidate(tb, -1);
|
|
}
|
|
tb = tb_next;
|
|
}
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
/* if no code remaining, no need to continue to use slow writes */
|
|
if (!p->first_tb) {
|
|
invalidate_page_bitmap(p);
|
|
tlb_unprotect_code_phys(cpu_single_env, start, vaddr);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* len must be <= 8 and start must be a multiple of len */
|
|
static inline void tb_invalidate_phys_page_fast(target_ulong start, int len, target_ulong vaddr)
|
|
{
|
|
PageDesc *p;
|
|
int offset, b;
|
|
#if 0
|
|
if (cpu_single_env->cr[0] & CR0_PE_MASK) {
|
|
printf("modifying code at 0x%x size=%d EIP=%x\n",
|
|
(vaddr & TARGET_PAGE_MASK) | (start & ~TARGET_PAGE_MASK), len,
|
|
cpu_single_env->eip);
|
|
}
|
|
#endif
|
|
p = page_find(start >> TARGET_PAGE_BITS);
|
|
if (!p)
|
|
return;
|
|
if (p->code_bitmap) {
|
|
offset = start & ~TARGET_PAGE_MASK;
|
|
b = p->code_bitmap[offset >> 3] >> (offset & 7);
|
|
if (b & ((1 << len) - 1))
|
|
goto do_invalidate;
|
|
} else {
|
|
do_invalidate:
|
|
tb_invalidate_phys_page_range(start, start + len, vaddr);
|
|
}
|
|
}
|
|
|
|
/* invalidate all TBs which intersect with the target virtual page
|
|
starting in range [start;end[. This function is usually used when
|
|
the target processor flushes its I-cache. NOTE: start and end must
|
|
refer to the same physical page */
|
|
void tb_invalidate_page_range(target_ulong start, target_ulong end)
|
|
{
|
|
int n;
|
|
PageDesc *p;
|
|
TranslationBlock *tb, *tb_next;
|
|
target_ulong pc;
|
|
target_ulong phys_start;
|
|
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
{
|
|
VirtPageDesc *vp;
|
|
vp = virt_page_find(start >> TARGET_PAGE_BITS);
|
|
if (!vp)
|
|
return;
|
|
if (vp->valid_tag != virt_valid_tag)
|
|
return;
|
|
phys_start = vp->phys_addr + (start & ~TARGET_PAGE_MASK);
|
|
}
|
|
#else
|
|
phys_start = start;
|
|
#endif
|
|
p = page_find(phys_start >> TARGET_PAGE_BITS);
|
|
if (!p)
|
|
return;
|
|
/* we remove all the TBs in the range [start, end[ */
|
|
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
|
tb = p->first_tb;
|
|
while (tb != NULL) {
|
|
n = (long)tb & 3;
|
|
tb = (TranslationBlock *)((long)tb & ~3);
|
|
tb_next = tb->page_next[n];
|
|
pc = tb->pc;
|
|
if (!((pc + tb->size) <= start || pc >= end)) {
|
|
tb_phys_invalidate(tb, -1);
|
|
}
|
|
tb = tb_next;
|
|
}
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
/* if no code remaining, no need to continue to use slow writes */
|
|
if (!p->first_tb)
|
|
tlb_unprotect_code(cpu_single_env, start);
|
|
#endif
|
|
}
|
|
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
static void tb_invalidate_phys_page(target_ulong addr)
|
|
{
|
|
int n;
|
|
PageDesc *p;
|
|
TranslationBlock *tb;
|
|
|
|
addr &= TARGET_PAGE_MASK;
|
|
p = page_find(addr >> TARGET_PAGE_BITS);
|
|
if (!p)
|
|
return;
|
|
tb = p->first_tb;
|
|
while (tb != NULL) {
|
|
n = (long)tb & 3;
|
|
tb = (TranslationBlock *)((long)tb & ~3);
|
|
tb_phys_invalidate(tb, addr);
|
|
tb = tb->page_next[n];
|
|
}
|
|
p->first_tb = NULL;
|
|
}
|
|
#endif
|
|
|
|
/* add the tb in the target page and protect it if necessary */
|
|
static inline void tb_alloc_page(TranslationBlock *tb,
|
|
unsigned int n, unsigned int page_addr)
|
|
{
|
|
PageDesc *p;
|
|
TranslationBlock *last_first_tb;
|
|
|
|
tb->page_addr[n] = page_addr;
|
|
p = page_find(page_addr >> TARGET_PAGE_BITS);
|
|
tb->page_next[n] = p->first_tb;
|
|
last_first_tb = p->first_tb;
|
|
p->first_tb = (TranslationBlock *)((long)tb | n);
|
|
invalidate_page_bitmap(p);
|
|
|
|
#if defined(CONFIG_USER_ONLY)
|
|
if (p->flags & PAGE_WRITE) {
|
|
unsigned long host_start, host_end, addr;
|
|
int prot;
|
|
|
|
/* force the host page as non writable (writes will have a
|
|
page fault + mprotect overhead) */
|
|
host_start = page_addr & host_page_mask;
|
|
host_end = host_start + host_page_size;
|
|
prot = 0;
|
|
for(addr = host_start; addr < host_end; addr += TARGET_PAGE_SIZE)
|
|
prot |= page_get_flags(addr);
|
|
mprotect((void *)host_start, host_page_size,
|
|
(prot & PAGE_BITS) & ~PAGE_WRITE);
|
|
#ifdef DEBUG_TB_INVALIDATE
|
|
printf("protecting code page: 0x%08lx\n",
|
|
host_start);
|
|
#endif
|
|
p->flags &= ~PAGE_WRITE;
|
|
}
|
|
#else
|
|
/* if some code is already present, then the pages are already
|
|
protected. So we handle the case where only the first TB is
|
|
allocated in a physical page */
|
|
if (!last_first_tb) {
|
|
target_ulong virt_addr;
|
|
|
|
virt_addr = (tb->pc & TARGET_PAGE_MASK) + (n << TARGET_PAGE_BITS);
|
|
tlb_protect_code(cpu_single_env, virt_addr);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* Allocate a new translation block. Flush the translation buffer if
|
|
too many translation blocks or too much generated code. */
|
|
TranslationBlock *tb_alloc(unsigned long pc)
|
|
{
|
|
TranslationBlock *tb;
|
|
|
|
if (nb_tbs >= CODE_GEN_MAX_BLOCKS ||
|
|
(code_gen_ptr - code_gen_buffer) >= CODE_GEN_BUFFER_MAX_SIZE)
|
|
return NULL;
|
|
tb = &tbs[nb_tbs++];
|
|
tb->pc = pc;
|
|
return tb;
|
|
}
|
|
|
|
/* add a new TB and link it to the physical page tables. phys_page2 is
|
|
(-1) to indicate that only one page contains the TB. */
|
|
void tb_link_phys(TranslationBlock *tb,
|
|
target_ulong phys_pc, target_ulong phys_page2)
|
|
{
|
|
unsigned int h;
|
|
TranslationBlock **ptb;
|
|
|
|
/* add in the physical hash table */
|
|
h = tb_phys_hash_func(phys_pc);
|
|
ptb = &tb_phys_hash[h];
|
|
tb->phys_hash_next = *ptb;
|
|
*ptb = tb;
|
|
|
|
/* add in the page list */
|
|
tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
|
|
if (phys_page2 != -1)
|
|
tb_alloc_page(tb, 1, phys_page2);
|
|
else
|
|
tb->page_addr[1] = -1;
|
|
#ifdef DEBUG_TB_CHECK
|
|
tb_page_check();
|
|
#endif
|
|
}
|
|
|
|
/* link the tb with the other TBs */
|
|
void tb_link(TranslationBlock *tb)
|
|
{
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
{
|
|
VirtPageDesc *vp;
|
|
target_ulong addr;
|
|
|
|
/* save the code memory mappings (needed to invalidate the code) */
|
|
addr = tb->pc & TARGET_PAGE_MASK;
|
|
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS);
|
|
#ifdef DEBUG_TLB_CHECK
|
|
if (vp->valid_tag == virt_valid_tag &&
|
|
vp->phys_addr != tb->page_addr[0]) {
|
|
printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n",
|
|
addr, tb->page_addr[0], vp->phys_addr);
|
|
}
|
|
#endif
|
|
vp->phys_addr = tb->page_addr[0];
|
|
if (vp->valid_tag != virt_valid_tag) {
|
|
vp->valid_tag = virt_valid_tag;
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
vp->prot = 0;
|
|
#endif
|
|
}
|
|
|
|
if (tb->page_addr[1] != -1) {
|
|
addr += TARGET_PAGE_SIZE;
|
|
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS);
|
|
#ifdef DEBUG_TLB_CHECK
|
|
if (vp->valid_tag == virt_valid_tag &&
|
|
vp->phys_addr != tb->page_addr[1]) {
|
|
printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n",
|
|
addr, tb->page_addr[1], vp->phys_addr);
|
|
}
|
|
#endif
|
|
vp->phys_addr = tb->page_addr[1];
|
|
if (vp->valid_tag != virt_valid_tag) {
|
|
vp->valid_tag = virt_valid_tag;
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
vp->prot = 0;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
tb->jmp_first = (TranslationBlock *)((long)tb | 2);
|
|
tb->jmp_next[0] = NULL;
|
|
tb->jmp_next[1] = NULL;
|
|
|
|
/* init original jump addresses */
|
|
if (tb->tb_next_offset[0] != 0xffff)
|
|
tb_reset_jump(tb, 0);
|
|
if (tb->tb_next_offset[1] != 0xffff)
|
|
tb_reset_jump(tb, 1);
|
|
}
|
|
|
|
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
|
|
tb[1].tc_ptr. Return NULL if not found */
|
|
TranslationBlock *tb_find_pc(unsigned long tc_ptr)
|
|
{
|
|
int m_min, m_max, m;
|
|
unsigned long v;
|
|
TranslationBlock *tb;
|
|
|
|
if (nb_tbs <= 0)
|
|
return NULL;
|
|
if (tc_ptr < (unsigned long)code_gen_buffer ||
|
|
tc_ptr >= (unsigned long)code_gen_ptr)
|
|
return NULL;
|
|
/* binary search (cf Knuth) */
|
|
m_min = 0;
|
|
m_max = nb_tbs - 1;
|
|
while (m_min <= m_max) {
|
|
m = (m_min + m_max) >> 1;
|
|
tb = &tbs[m];
|
|
v = (unsigned long)tb->tc_ptr;
|
|
if (v == tc_ptr)
|
|
return tb;
|
|
else if (tc_ptr < v) {
|
|
m_max = m - 1;
|
|
} else {
|
|
m_min = m + 1;
|
|
}
|
|
}
|
|
return &tbs[m_max];
|
|
}
|
|
|
|
static void tb_reset_jump_recursive(TranslationBlock *tb);
|
|
|
|
static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n)
|
|
{
|
|
TranslationBlock *tb1, *tb_next, **ptb;
|
|
unsigned int n1;
|
|
|
|
tb1 = tb->jmp_next[n];
|
|
if (tb1 != NULL) {
|
|
/* find head of list */
|
|
for(;;) {
|
|
n1 = (long)tb1 & 3;
|
|
tb1 = (TranslationBlock *)((long)tb1 & ~3);
|
|
if (n1 == 2)
|
|
break;
|
|
tb1 = tb1->jmp_next[n1];
|
|
}
|
|
/* we are now sure now that tb jumps to tb1 */
|
|
tb_next = tb1;
|
|
|
|
/* remove tb from the jmp_first list */
|
|
ptb = &tb_next->jmp_first;
|
|
for(;;) {
|
|
tb1 = *ptb;
|
|
n1 = (long)tb1 & 3;
|
|
tb1 = (TranslationBlock *)((long)tb1 & ~3);
|
|
if (n1 == n && tb1 == tb)
|
|
break;
|
|
ptb = &tb1->jmp_next[n1];
|
|
}
|
|
*ptb = tb->jmp_next[n];
|
|
tb->jmp_next[n] = NULL;
|
|
|
|
/* suppress the jump to next tb in generated code */
|
|
tb_reset_jump(tb, n);
|
|
|
|
/* suppress jumps in the tb on which we could have jumped */
|
|
tb_reset_jump_recursive(tb_next);
|
|
}
|
|
}
|
|
|
|
static void tb_reset_jump_recursive(TranslationBlock *tb)
|
|
{
|
|
tb_reset_jump_recursive2(tb, 0);
|
|
tb_reset_jump_recursive2(tb, 1);
|
|
}
|
|
|
|
/* add a breakpoint. EXCP_DEBUG is returned by the CPU loop if a
|
|
breakpoint is reached */
|
|
int cpu_breakpoint_insert(CPUState *env, uint32_t pc)
|
|
{
|
|
#if defined(TARGET_I386)
|
|
int i;
|
|
|
|
for(i = 0; i < env->nb_breakpoints; i++) {
|
|
if (env->breakpoints[i] == pc)
|
|
return 0;
|
|
}
|
|
|
|
if (env->nb_breakpoints >= MAX_BREAKPOINTS)
|
|
return -1;
|
|
env->breakpoints[env->nb_breakpoints++] = pc;
|
|
tb_invalidate_page_range(pc, pc + 1);
|
|
return 0;
|
|
#else
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
/* remove a breakpoint */
|
|
int cpu_breakpoint_remove(CPUState *env, uint32_t pc)
|
|
{
|
|
#if defined(TARGET_I386)
|
|
int i;
|
|
for(i = 0; i < env->nb_breakpoints; i++) {
|
|
if (env->breakpoints[i] == pc)
|
|
goto found;
|
|
}
|
|
return -1;
|
|
found:
|
|
memmove(&env->breakpoints[i], &env->breakpoints[i + 1],
|
|
(env->nb_breakpoints - (i + 1)) * sizeof(env->breakpoints[0]));
|
|
env->nb_breakpoints--;
|
|
tb_invalidate_page_range(pc, pc + 1);
|
|
return 0;
|
|
#else
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
/* enable or disable single step mode. EXCP_DEBUG is returned by the
|
|
CPU loop after each instruction */
|
|
void cpu_single_step(CPUState *env, int enabled)
|
|
{
|
|
#if defined(TARGET_I386)
|
|
if (env->singlestep_enabled != enabled) {
|
|
env->singlestep_enabled = enabled;
|
|
/* must flush all the translated code to avoid inconsistancies */
|
|
/* XXX: only flush what is necessary */
|
|
tb_flush(env);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* enable or disable low levels log */
|
|
void cpu_set_log(int log_flags)
|
|
{
|
|
loglevel = log_flags;
|
|
if (loglevel && !logfile) {
|
|
logfile = fopen(logfilename, "w");
|
|
if (!logfile) {
|
|
perror(logfilename);
|
|
_exit(1);
|
|
}
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
/* must avoid mmap() usage of glibc by setting a buffer "by hand" */
|
|
{
|
|
static uint8_t logfile_buf[4096];
|
|
setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
|
|
}
|
|
#else
|
|
setvbuf(logfile, NULL, _IOLBF, 0);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void cpu_set_log_filename(const char *filename)
|
|
{
|
|
logfilename = strdup(filename);
|
|
}
|
|
|
|
/* mask must never be zero, except for A20 change call */
|
|
void cpu_interrupt(CPUState *env, int mask)
|
|
{
|
|
TranslationBlock *tb;
|
|
static int interrupt_lock;
|
|
|
|
env->interrupt_request |= mask;
|
|
/* if the cpu is currently executing code, we must unlink it and
|
|
all the potentially executing TB */
|
|
tb = env->current_tb;
|
|
if (tb && !testandset(&interrupt_lock)) {
|
|
env->current_tb = NULL;
|
|
tb_reset_jump_recursive(tb);
|
|
interrupt_lock = 0;
|
|
}
|
|
}
|
|
|
|
|
|
void cpu_abort(CPUState *env, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
fprintf(stderr, "qemu: fatal: ");
|
|
vfprintf(stderr, fmt, ap);
|
|
fprintf(stderr, "\n");
|
|
#ifdef TARGET_I386
|
|
cpu_x86_dump_state(env, stderr, X86_DUMP_FPU | X86_DUMP_CCOP);
|
|
#endif
|
|
va_end(ap);
|
|
abort();
|
|
}
|
|
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
|
|
/* NOTE: if flush_global is true, also flush global entries (not
|
|
implemented yet) */
|
|
void tlb_flush(CPUState *env, int flush_global)
|
|
{
|
|
int i;
|
|
|
|
#if defined(DEBUG_TLB)
|
|
printf("tlb_flush:\n");
|
|
#endif
|
|
/* must reset current TB so that interrupts cannot modify the
|
|
links while we are modifying them */
|
|
env->current_tb = NULL;
|
|
|
|
for(i = 0; i < CPU_TLB_SIZE; i++) {
|
|
env->tlb_read[0][i].address = -1;
|
|
env->tlb_write[0][i].address = -1;
|
|
env->tlb_read[1][i].address = -1;
|
|
env->tlb_write[1][i].address = -1;
|
|
}
|
|
|
|
virt_page_flush();
|
|
for(i = 0;i < CODE_GEN_HASH_SIZE; i++)
|
|
tb_hash[i] = NULL;
|
|
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
munmap((void *)MMAP_AREA_START, MMAP_AREA_END - MMAP_AREA_START);
|
|
#endif
|
|
}
|
|
|
|
static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, uint32_t addr)
|
|
{
|
|
if (addr == (tlb_entry->address &
|
|
(TARGET_PAGE_MASK | TLB_INVALID_MASK)))
|
|
tlb_entry->address = -1;
|
|
}
|
|
|
|
void tlb_flush_page(CPUState *env, uint32_t addr)
|
|
{
|
|
int i, n;
|
|
VirtPageDesc *vp;
|
|
PageDesc *p;
|
|
TranslationBlock *tb;
|
|
|
|
#if defined(DEBUG_TLB)
|
|
printf("tlb_flush_page: 0x%08x\n", addr);
|
|
#endif
|
|
/* must reset current TB so that interrupts cannot modify the
|
|
links while we are modifying them */
|
|
env->current_tb = NULL;
|
|
|
|
addr &= TARGET_PAGE_MASK;
|
|
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
tlb_flush_entry(&env->tlb_read[0][i], addr);
|
|
tlb_flush_entry(&env->tlb_write[0][i], addr);
|
|
tlb_flush_entry(&env->tlb_read[1][i], addr);
|
|
tlb_flush_entry(&env->tlb_write[1][i], addr);
|
|
|
|
/* remove from the virtual pc hash table all the TB at this
|
|
virtual address */
|
|
|
|
vp = virt_page_find(addr >> TARGET_PAGE_BITS);
|
|
if (vp && vp->valid_tag == virt_valid_tag) {
|
|
p = page_find(vp->phys_addr >> TARGET_PAGE_BITS);
|
|
if (p) {
|
|
/* we remove all the links to the TBs in this virtual page */
|
|
tb = p->first_tb;
|
|
while (tb != NULL) {
|
|
n = (long)tb & 3;
|
|
tb = (TranslationBlock *)((long)tb & ~3);
|
|
if ((tb->pc & TARGET_PAGE_MASK) == addr ||
|
|
((tb->pc + tb->size - 1) & TARGET_PAGE_MASK) == addr) {
|
|
tb_invalidate(tb);
|
|
}
|
|
tb = tb->page_next[n];
|
|
}
|
|
}
|
|
vp->valid_tag = 0;
|
|
}
|
|
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
if (addr < MMAP_AREA_END)
|
|
munmap((void *)addr, TARGET_PAGE_SIZE);
|
|
#endif
|
|
}
|
|
|
|
static inline void tlb_protect_code1(CPUTLBEntry *tlb_entry, uint32_t addr)
|
|
{
|
|
if (addr == (tlb_entry->address &
|
|
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) &&
|
|
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_CODE &&
|
|
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_ROM) {
|
|
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_CODE;
|
|
}
|
|
}
|
|
|
|
/* update the TLBs so that writes to code in the virtual page 'addr'
|
|
can be detected */
|
|
static void tlb_protect_code(CPUState *env, uint32_t addr)
|
|
{
|
|
int i;
|
|
|
|
addr &= TARGET_PAGE_MASK;
|
|
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
tlb_protect_code1(&env->tlb_write[0][i], addr);
|
|
tlb_protect_code1(&env->tlb_write[1][i], addr);
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
/* NOTE: as we generated the code for this page, it is already at
|
|
least readable */
|
|
if (addr < MMAP_AREA_END)
|
|
mprotect((void *)addr, TARGET_PAGE_SIZE, PROT_READ);
|
|
#endif
|
|
}
|
|
|
|
static inline void tlb_unprotect_code1(CPUTLBEntry *tlb_entry, uint32_t addr)
|
|
{
|
|
if (addr == (tlb_entry->address &
|
|
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) &&
|
|
(tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE) {
|
|
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY;
|
|
}
|
|
}
|
|
|
|
/* update the TLB so that writes in virtual page 'addr' are no longer
|
|
tested self modifying code */
|
|
static void tlb_unprotect_code(CPUState *env, uint32_t addr)
|
|
{
|
|
int i;
|
|
|
|
addr &= TARGET_PAGE_MASK;
|
|
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
tlb_unprotect_code1(&env->tlb_write[0][i], addr);
|
|
tlb_unprotect_code1(&env->tlb_write[1][i], addr);
|
|
}
|
|
|
|
static inline void tlb_unprotect_code2(CPUTLBEntry *tlb_entry,
|
|
uint32_t phys_addr)
|
|
{
|
|
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE &&
|
|
((tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend) == phys_addr) {
|
|
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY;
|
|
}
|
|
}
|
|
|
|
/* update the TLB so that writes in physical page 'phys_addr' are no longer
|
|
tested self modifying code */
|
|
static void tlb_unprotect_code_phys(CPUState *env, uint32_t phys_addr, target_ulong vaddr)
|
|
{
|
|
int i;
|
|
|
|
phys_addr &= TARGET_PAGE_MASK;
|
|
phys_addr += (long)phys_ram_base;
|
|
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
tlb_unprotect_code2(&env->tlb_write[0][i], phys_addr);
|
|
tlb_unprotect_code2(&env->tlb_write[1][i], phys_addr);
|
|
}
|
|
|
|
static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry,
|
|
unsigned long start, unsigned long length)
|
|
{
|
|
unsigned long addr;
|
|
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
|
|
addr = (tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend;
|
|
if ((addr - start) < length) {
|
|
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY;
|
|
}
|
|
}
|
|
}
|
|
|
|
void cpu_physical_memory_reset_dirty(target_ulong start, target_ulong end)
|
|
{
|
|
CPUState *env;
|
|
target_ulong length, start1;
|
|
int i;
|
|
|
|
start &= TARGET_PAGE_MASK;
|
|
end = TARGET_PAGE_ALIGN(end);
|
|
|
|
length = end - start;
|
|
if (length == 0)
|
|
return;
|
|
memset(phys_ram_dirty + (start >> TARGET_PAGE_BITS), 0, length >> TARGET_PAGE_BITS);
|
|
|
|
env = cpu_single_env;
|
|
/* we modify the TLB cache so that the dirty bit will be set again
|
|
when accessing the range */
|
|
start1 = start + (unsigned long)phys_ram_base;
|
|
for(i = 0; i < CPU_TLB_SIZE; i++)
|
|
tlb_reset_dirty_range(&env->tlb_write[0][i], start1, length);
|
|
for(i = 0; i < CPU_TLB_SIZE; i++)
|
|
tlb_reset_dirty_range(&env->tlb_write[1][i], start1, length);
|
|
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
/* XXX: this is expensive */
|
|
{
|
|
VirtPageDesc *p;
|
|
int j;
|
|
target_ulong addr;
|
|
|
|
for(i = 0; i < L1_SIZE; i++) {
|
|
p = l1_virt_map[i];
|
|
if (p) {
|
|
addr = i << (TARGET_PAGE_BITS + L2_BITS);
|
|
for(j = 0; j < L2_SIZE; j++) {
|
|
if (p->valid_tag == virt_valid_tag &&
|
|
p->phys_addr >= start && p->phys_addr < end &&
|
|
(p->prot & PROT_WRITE)) {
|
|
if (addr < MMAP_AREA_END) {
|
|
mprotect((void *)addr, TARGET_PAGE_SIZE,
|
|
p->prot & ~PROT_WRITE);
|
|
}
|
|
}
|
|
addr += TARGET_PAGE_SIZE;
|
|
p++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry,
|
|
unsigned long start)
|
|
{
|
|
unsigned long addr;
|
|
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_NOTDIRTY) {
|
|
addr = (tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend;
|
|
if (addr == start) {
|
|
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_RAM;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* update the TLB corresponding to virtual page vaddr and phys addr
|
|
addr so that it is no longer dirty */
|
|
static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr)
|
|
{
|
|
CPUState *env = cpu_single_env;
|
|
int i;
|
|
|
|
phys_ram_dirty[(addr - (unsigned long)phys_ram_base) >> TARGET_PAGE_BITS] = 1;
|
|
|
|
addr &= TARGET_PAGE_MASK;
|
|
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
tlb_set_dirty1(&env->tlb_write[0][i], addr);
|
|
tlb_set_dirty1(&env->tlb_write[1][i], addr);
|
|
}
|
|
|
|
/* add a new TLB entry. At most one entry for a given virtual address
|
|
is permitted. Return 0 if OK or 2 if the page could not be mapped
|
|
(can only happen in non SOFTMMU mode for I/O pages or pages
|
|
conflicting with the host address space). */
|
|
int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot,
|
|
int is_user, int is_softmmu)
|
|
{
|
|
PageDesc *p;
|
|
target_ulong pd;
|
|
TranslationBlock *first_tb;
|
|
unsigned int index;
|
|
target_ulong address, addend;
|
|
int ret;
|
|
|
|
p = page_find(paddr >> TARGET_PAGE_BITS);
|
|
if (!p) {
|
|
pd = IO_MEM_UNASSIGNED;
|
|
first_tb = NULL;
|
|
} else {
|
|
pd = p->phys_offset;
|
|
first_tb = p->first_tb;
|
|
}
|
|
#if defined(DEBUG_TLB)
|
|
printf("tlb_set_page: vaddr=0x%08x paddr=0x%08x prot=%x u=%d c=%d smmu=%d pd=0x%08x\n",
|
|
vaddr, paddr, prot, is_user, (first_tb != NULL), is_softmmu, pd);
|
|
#endif
|
|
|
|
ret = 0;
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
if (is_softmmu)
|
|
#endif
|
|
{
|
|
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
|
|
/* IO memory case */
|
|
address = vaddr | pd;
|
|
addend = paddr;
|
|
} else {
|
|
/* standard memory */
|
|
address = vaddr;
|
|
addend = (unsigned long)phys_ram_base + (pd & TARGET_PAGE_MASK);
|
|
}
|
|
|
|
index = (vaddr >> 12) & (CPU_TLB_SIZE - 1);
|
|
addend -= vaddr;
|
|
if (prot & PROT_READ) {
|
|
env->tlb_read[is_user][index].address = address;
|
|
env->tlb_read[is_user][index].addend = addend;
|
|
} else {
|
|
env->tlb_read[is_user][index].address = -1;
|
|
env->tlb_read[is_user][index].addend = -1;
|
|
}
|
|
if (prot & PROT_WRITE) {
|
|
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM) {
|
|
/* ROM: access is ignored (same as unassigned) */
|
|
env->tlb_write[is_user][index].address = vaddr | IO_MEM_ROM;
|
|
env->tlb_write[is_user][index].addend = addend;
|
|
} else if (first_tb) {
|
|
/* if code is present, we use a specific memory
|
|
handler. It works only for physical memory access */
|
|
env->tlb_write[is_user][index].address = vaddr | IO_MEM_CODE;
|
|
env->tlb_write[is_user][index].addend = addend;
|
|
} else if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM &&
|
|
!cpu_physical_memory_is_dirty(pd)) {
|
|
env->tlb_write[is_user][index].address = vaddr | IO_MEM_NOTDIRTY;
|
|
env->tlb_write[is_user][index].addend = addend;
|
|
} else {
|
|
env->tlb_write[is_user][index].address = address;
|
|
env->tlb_write[is_user][index].addend = addend;
|
|
}
|
|
} else {
|
|
env->tlb_write[is_user][index].address = -1;
|
|
env->tlb_write[is_user][index].addend = -1;
|
|
}
|
|
}
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
else {
|
|
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
|
|
/* IO access: no mapping is done as it will be handled by the
|
|
soft MMU */
|
|
if (!(env->hflags & HF_SOFTMMU_MASK))
|
|
ret = 2;
|
|
} else {
|
|
void *map_addr;
|
|
|
|
if (vaddr >= MMAP_AREA_END) {
|
|
ret = 2;
|
|
} else {
|
|
if (prot & PROT_WRITE) {
|
|
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM ||
|
|
first_tb ||
|
|
((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM &&
|
|
!cpu_physical_memory_is_dirty(pd))) {
|
|
/* ROM: we do as if code was inside */
|
|
/* if code is present, we only map as read only and save the
|
|
original mapping */
|
|
VirtPageDesc *vp;
|
|
|
|
vp = virt_page_find_alloc(vaddr >> TARGET_PAGE_BITS);
|
|
vp->phys_addr = pd;
|
|
vp->prot = prot;
|
|
vp->valid_tag = virt_valid_tag;
|
|
prot &= ~PAGE_WRITE;
|
|
}
|
|
}
|
|
map_addr = mmap((void *)vaddr, TARGET_PAGE_SIZE, prot,
|
|
MAP_SHARED | MAP_FIXED, phys_ram_fd, (pd & TARGET_PAGE_MASK));
|
|
if (map_addr == MAP_FAILED) {
|
|
cpu_abort(env, "mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
|
|
paddr, vaddr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
/* called from signal handler: invalidate the code and unprotect the
|
|
page. Return TRUE if the fault was succesfully handled. */
|
|
int page_unprotect(unsigned long addr)
|
|
{
|
|
#if !defined(CONFIG_SOFTMMU)
|
|
VirtPageDesc *vp;
|
|
|
|
#if defined(DEBUG_TLB)
|
|
printf("page_unprotect: addr=0x%08x\n", addr);
|
|
#endif
|
|
addr &= TARGET_PAGE_MASK;
|
|
|
|
/* if it is not mapped, no need to worry here */
|
|
if (addr >= MMAP_AREA_END)
|
|
return 0;
|
|
vp = virt_page_find(addr >> TARGET_PAGE_BITS);
|
|
if (!vp)
|
|
return 0;
|
|
/* NOTE: in this case, validate_tag is _not_ tested as it
|
|
validates only the code TLB */
|
|
if (vp->valid_tag != virt_valid_tag)
|
|
return 0;
|
|
if (!(vp->prot & PAGE_WRITE))
|
|
return 0;
|
|
#if defined(DEBUG_TLB)
|
|
printf("page_unprotect: addr=0x%08x phys_addr=0x%08x prot=%x\n",
|
|
addr, vp->phys_addr, vp->prot);
|
|
#endif
|
|
/* set the dirty bit */
|
|
phys_ram_dirty[vp->phys_addr >> TARGET_PAGE_BITS] = 1;
|
|
/* flush the code inside */
|
|
tb_invalidate_phys_page(vp->phys_addr);
|
|
if (mprotect((void *)addr, TARGET_PAGE_SIZE, vp->prot) < 0)
|
|
cpu_abort(cpu_single_env, "error mprotect addr=0x%lx prot=%d\n",
|
|
(unsigned long)addr, vp->prot);
|
|
return 1;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
#else
|
|
|
|
void tlb_flush(CPUState *env, int flush_global)
|
|
{
|
|
}
|
|
|
|
void tlb_flush_page(CPUState *env, uint32_t addr)
|
|
{
|
|
}
|
|
|
|
void tlb_flush_page_write(CPUState *env, uint32_t addr)
|
|
{
|
|
}
|
|
|
|
int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot,
|
|
int is_user, int is_softmmu)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* dump memory mappings */
|
|
void page_dump(FILE *f)
|
|
{
|
|
unsigned long start, end;
|
|
int i, j, prot, prot1;
|
|
PageDesc *p;
|
|
|
|
fprintf(f, "%-8s %-8s %-8s %s\n",
|
|
"start", "end", "size", "prot");
|
|
start = -1;
|
|
end = -1;
|
|
prot = 0;
|
|
for(i = 0; i <= L1_SIZE; i++) {
|
|
if (i < L1_SIZE)
|
|
p = l1_map[i];
|
|
else
|
|
p = NULL;
|
|
for(j = 0;j < L2_SIZE; j++) {
|
|
if (!p)
|
|
prot1 = 0;
|
|
else
|
|
prot1 = p[j].flags;
|
|
if (prot1 != prot) {
|
|
end = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS);
|
|
if (start != -1) {
|
|
fprintf(f, "%08lx-%08lx %08lx %c%c%c\n",
|
|
start, end, end - start,
|
|
prot & PAGE_READ ? 'r' : '-',
|
|
prot & PAGE_WRITE ? 'w' : '-',
|
|
prot & PAGE_EXEC ? 'x' : '-');
|
|
}
|
|
if (prot1 != 0)
|
|
start = end;
|
|
else
|
|
start = -1;
|
|
prot = prot1;
|
|
}
|
|
if (!p)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
int page_get_flags(unsigned long address)
|
|
{
|
|
PageDesc *p;
|
|
|
|
p = page_find(address >> TARGET_PAGE_BITS);
|
|
if (!p)
|
|
return 0;
|
|
return p->flags;
|
|
}
|
|
|
|
/* modify the flags of a page and invalidate the code if
|
|
necessary. The flag PAGE_WRITE_ORG is positionned automatically
|
|
depending on PAGE_WRITE */
|
|
void page_set_flags(unsigned long start, unsigned long end, int flags)
|
|
{
|
|
PageDesc *p;
|
|
unsigned long addr;
|
|
|
|
start = start & TARGET_PAGE_MASK;
|
|
end = TARGET_PAGE_ALIGN(end);
|
|
if (flags & PAGE_WRITE)
|
|
flags |= PAGE_WRITE_ORG;
|
|
spin_lock(&tb_lock);
|
|
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
|
p = page_find_alloc(addr >> TARGET_PAGE_BITS);
|
|
/* if the write protection is set, then we invalidate the code
|
|
inside */
|
|
if (!(p->flags & PAGE_WRITE) &&
|
|
(flags & PAGE_WRITE) &&
|
|
p->first_tb) {
|
|
tb_invalidate_phys_page(addr);
|
|
}
|
|
p->flags = flags;
|
|
}
|
|
spin_unlock(&tb_lock);
|
|
}
|
|
|
|
/* called from signal handler: invalidate the code and unprotect the
|
|
page. Return TRUE if the fault was succesfully handled. */
|
|
int page_unprotect(unsigned long address)
|
|
{
|
|
unsigned int page_index, prot, pindex;
|
|
PageDesc *p, *p1;
|
|
unsigned long host_start, host_end, addr;
|
|
|
|
host_start = address & host_page_mask;
|
|
page_index = host_start >> TARGET_PAGE_BITS;
|
|
p1 = page_find(page_index);
|
|
if (!p1)
|
|
return 0;
|
|
host_end = host_start + host_page_size;
|
|
p = p1;
|
|
prot = 0;
|
|
for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) {
|
|
prot |= p->flags;
|
|
p++;
|
|
}
|
|
/* if the page was really writable, then we change its
|
|
protection back to writable */
|
|
if (prot & PAGE_WRITE_ORG) {
|
|
pindex = (address - host_start) >> TARGET_PAGE_BITS;
|
|
if (!(p1[pindex].flags & PAGE_WRITE)) {
|
|
mprotect((void *)host_start, host_page_size,
|
|
(prot & PAGE_BITS) | PAGE_WRITE);
|
|
p1[pindex].flags |= PAGE_WRITE;
|
|
/* and since the content will be modified, we must invalidate
|
|
the corresponding translated code. */
|
|
tb_invalidate_phys_page(address);
|
|
#ifdef DEBUG_TB_CHECK
|
|
tb_invalidate_check(address);
|
|
#endif
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* call this function when system calls directly modify a memory area */
|
|
void page_unprotect_range(uint8_t *data, unsigned long data_size)
|
|
{
|
|
unsigned long start, end, addr;
|
|
|
|
start = (unsigned long)data;
|
|
end = start + data_size;
|
|
start &= TARGET_PAGE_MASK;
|
|
end = TARGET_PAGE_ALIGN(end);
|
|
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
|
page_unprotect(addr);
|
|
}
|
|
}
|
|
|
|
static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr)
|
|
{
|
|
}
|
|
|
|
#endif /* defined(CONFIG_USER_ONLY) */
|
|
|
|
/* register physical memory. 'size' must be a multiple of the target
|
|
page size. If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
|
|
io memory page */
|
|
void cpu_register_physical_memory(unsigned long start_addr, unsigned long size,
|
|
long phys_offset)
|
|
{
|
|
unsigned long addr, end_addr;
|
|
PageDesc *p;
|
|
|
|
end_addr = start_addr + size;
|
|
for(addr = start_addr; addr < end_addr; addr += TARGET_PAGE_SIZE) {
|
|
p = page_find_alloc(addr >> TARGET_PAGE_BITS);
|
|
p->phys_offset = phys_offset;
|
|
if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM)
|
|
phys_offset += TARGET_PAGE_SIZE;
|
|
}
|
|
}
|
|
|
|
static uint32_t unassigned_mem_readb(uint32_t addr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void unassigned_mem_writeb(uint32_t addr, uint32_t val, uint32_t vaddr)
|
|
{
|
|
}
|
|
|
|
static CPUReadMemoryFunc *unassigned_mem_read[3] = {
|
|
unassigned_mem_readb,
|
|
unassigned_mem_readb,
|
|
unassigned_mem_readb,
|
|
};
|
|
|
|
static CPUWriteMemoryFunc *unassigned_mem_write[3] = {
|
|
unassigned_mem_writeb,
|
|
unassigned_mem_writeb,
|
|
unassigned_mem_writeb,
|
|
};
|
|
|
|
/* self modifying code support in soft mmu mode : writing to a page
|
|
containing code comes to these functions */
|
|
|
|
static void code_mem_writeb(uint32_t addr, uint32_t val, uint32_t vaddr)
|
|
{
|
|
unsigned long phys_addr;
|
|
|
|
phys_addr = addr - (long)phys_ram_base;
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
tb_invalidate_phys_page_fast(phys_addr, 1, vaddr);
|
|
#endif
|
|
stb_raw((uint8_t *)addr, val);
|
|
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
|
}
|
|
|
|
static void code_mem_writew(uint32_t addr, uint32_t val, uint32_t vaddr)
|
|
{
|
|
unsigned long phys_addr;
|
|
|
|
phys_addr = addr - (long)phys_ram_base;
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
tb_invalidate_phys_page_fast(phys_addr, 2, vaddr);
|
|
#endif
|
|
stw_raw((uint8_t *)addr, val);
|
|
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
|
}
|
|
|
|
static void code_mem_writel(uint32_t addr, uint32_t val, uint32_t vaddr)
|
|
{
|
|
unsigned long phys_addr;
|
|
|
|
phys_addr = addr - (long)phys_ram_base;
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
tb_invalidate_phys_page_fast(phys_addr, 4, vaddr);
|
|
#endif
|
|
stl_raw((uint8_t *)addr, val);
|
|
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
|
}
|
|
|
|
static CPUReadMemoryFunc *code_mem_read[3] = {
|
|
NULL, /* never used */
|
|
NULL, /* never used */
|
|
NULL, /* never used */
|
|
};
|
|
|
|
static CPUWriteMemoryFunc *code_mem_write[3] = {
|
|
code_mem_writeb,
|
|
code_mem_writew,
|
|
code_mem_writel,
|
|
};
|
|
|
|
static void notdirty_mem_writeb(uint32_t addr, uint32_t val, uint32_t vaddr)
|
|
{
|
|
stb_raw((uint8_t *)addr, val);
|
|
tlb_set_dirty(addr, vaddr);
|
|
}
|
|
|
|
static void notdirty_mem_writew(uint32_t addr, uint32_t val, uint32_t vaddr)
|
|
{
|
|
stw_raw((uint8_t *)addr, val);
|
|
tlb_set_dirty(addr, vaddr);
|
|
}
|
|
|
|
static void notdirty_mem_writel(uint32_t addr, uint32_t val, uint32_t vaddr)
|
|
{
|
|
stl_raw((uint8_t *)addr, val);
|
|
tlb_set_dirty(addr, vaddr);
|
|
}
|
|
|
|
static CPUWriteMemoryFunc *notdirty_mem_write[3] = {
|
|
notdirty_mem_writeb,
|
|
notdirty_mem_writew,
|
|
notdirty_mem_writel,
|
|
};
|
|
|
|
static void io_mem_init(void)
|
|
{
|
|
cpu_register_io_memory(IO_MEM_ROM >> IO_MEM_SHIFT, code_mem_read, unassigned_mem_write);
|
|
cpu_register_io_memory(IO_MEM_UNASSIGNED >> IO_MEM_SHIFT, unassigned_mem_read, unassigned_mem_write);
|
|
cpu_register_io_memory(IO_MEM_CODE >> IO_MEM_SHIFT, code_mem_read, code_mem_write);
|
|
cpu_register_io_memory(IO_MEM_NOTDIRTY >> IO_MEM_SHIFT, code_mem_read, notdirty_mem_write);
|
|
io_mem_nb = 5;
|
|
|
|
/* alloc dirty bits array */
|
|
phys_ram_dirty = qemu_malloc(phys_ram_size >> TARGET_PAGE_BITS);
|
|
}
|
|
|
|
/* mem_read and mem_write are arrays of functions containing the
|
|
function to access byte (index 0), word (index 1) and dword (index
|
|
2). All functions must be supplied. If io_index is non zero, the
|
|
corresponding io zone is modified. If it is zero, a new io zone is
|
|
allocated. The return value can be used with
|
|
cpu_register_physical_memory(). (-1) is returned if error. */
|
|
int cpu_register_io_memory(int io_index,
|
|
CPUReadMemoryFunc **mem_read,
|
|
CPUWriteMemoryFunc **mem_write)
|
|
{
|
|
int i;
|
|
|
|
if (io_index <= 0) {
|
|
if (io_index >= IO_MEM_NB_ENTRIES)
|
|
return -1;
|
|
io_index = io_mem_nb++;
|
|
} else {
|
|
if (io_index >= IO_MEM_NB_ENTRIES)
|
|
return -1;
|
|
}
|
|
|
|
for(i = 0;i < 3; i++) {
|
|
io_mem_read[io_index][i] = mem_read[i];
|
|
io_mem_write[io_index][i] = mem_write[i];
|
|
}
|
|
return io_index << IO_MEM_SHIFT;
|
|
}
|
|
|
|
/* physical memory access (slow version, mainly for debug) */
|
|
#if defined(CONFIG_USER_ONLY)
|
|
void cpu_physical_memory_rw(CPUState *env, uint8_t *buf, target_ulong addr,
|
|
int len, int is_write)
|
|
{
|
|
int l, flags;
|
|
target_ulong page;
|
|
|
|
while (len > 0) {
|
|
page = addr & TARGET_PAGE_MASK;
|
|
l = (page + TARGET_PAGE_SIZE) - addr;
|
|
if (l > len)
|
|
l = len;
|
|
flags = page_get_flags(page);
|
|
if (!(flags & PAGE_VALID))
|
|
return;
|
|
if (is_write) {
|
|
if (!(flags & PAGE_WRITE))
|
|
return;
|
|
memcpy((uint8_t *)addr, buf, len);
|
|
} else {
|
|
if (!(flags & PAGE_READ))
|
|
return;
|
|
memcpy(buf, (uint8_t *)addr, len);
|
|
}
|
|
len -= l;
|
|
buf += l;
|
|
addr += l;
|
|
}
|
|
}
|
|
#else
|
|
void cpu_physical_memory_rw(CPUState *env, uint8_t *buf, target_ulong addr,
|
|
int len, int is_write)
|
|
{
|
|
int l, io_index;
|
|
uint8_t *ptr;
|
|
uint32_t val;
|
|
target_ulong page, pd;
|
|
PageDesc *p;
|
|
|
|
while (len > 0) {
|
|
page = addr & TARGET_PAGE_MASK;
|
|
l = (page + TARGET_PAGE_SIZE) - addr;
|
|
if (l > len)
|
|
l = len;
|
|
p = page_find(page >> TARGET_PAGE_BITS);
|
|
if (!p) {
|
|
pd = IO_MEM_UNASSIGNED;
|
|
} else {
|
|
pd = p->phys_offset;
|
|
}
|
|
|
|
if (is_write) {
|
|
if ((pd & ~TARGET_PAGE_MASK) != 0) {
|
|
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
|
if (l >= 4 && ((addr & 3) == 0)) {
|
|
/* 32 bit read access */
|
|
val = ldl_raw(buf);
|
|
io_mem_write[io_index][2](addr, val, 0);
|
|
l = 4;
|
|
} else if (l >= 2 && ((addr & 1) == 0)) {
|
|
/* 16 bit read access */
|
|
val = lduw_raw(buf);
|
|
io_mem_write[io_index][1](addr, val, 0);
|
|
l = 2;
|
|
} else {
|
|
/* 8 bit access */
|
|
val = ldub_raw(buf);
|
|
io_mem_write[io_index][0](addr, val, 0);
|
|
l = 1;
|
|
}
|
|
} else {
|
|
/* RAM case */
|
|
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) +
|
|
(addr & ~TARGET_PAGE_MASK);
|
|
memcpy(ptr, buf, l);
|
|
}
|
|
} else {
|
|
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
|
(pd & ~TARGET_PAGE_MASK) != IO_MEM_CODE) {
|
|
/* I/O case */
|
|
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
|
if (l >= 4 && ((addr & 3) == 0)) {
|
|
/* 32 bit read access */
|
|
val = io_mem_read[io_index][2](addr);
|
|
stl_raw(buf, val);
|
|
l = 4;
|
|
} else if (l >= 2 && ((addr & 1) == 0)) {
|
|
/* 16 bit read access */
|
|
val = io_mem_read[io_index][1](addr);
|
|
stw_raw(buf, val);
|
|
l = 2;
|
|
} else {
|
|
/* 8 bit access */
|
|
val = io_mem_read[io_index][0](addr);
|
|
stb_raw(buf, val);
|
|
l = 1;
|
|
}
|
|
} else {
|
|
/* RAM case */
|
|
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) +
|
|
(addr & ~TARGET_PAGE_MASK);
|
|
memcpy(buf, ptr, l);
|
|
}
|
|
}
|
|
len -= l;
|
|
buf += l;
|
|
addr += l;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* virtual memory access for debug */
|
|
int cpu_memory_rw_debug(CPUState *env,
|
|
uint8_t *buf, target_ulong addr, int len, int is_write)
|
|
{
|
|
int l;
|
|
target_ulong page, phys_addr;
|
|
|
|
while (len > 0) {
|
|
page = addr & TARGET_PAGE_MASK;
|
|
phys_addr = cpu_get_phys_page_debug(env, page);
|
|
/* if no physical page mapped, return an error */
|
|
if (phys_addr == -1)
|
|
return -1;
|
|
l = (page + TARGET_PAGE_SIZE) - addr;
|
|
if (l > len)
|
|
l = len;
|
|
cpu_physical_memory_rw(env, buf,
|
|
phys_addr + (addr & ~TARGET_PAGE_MASK), l,
|
|
is_write);
|
|
len -= l;
|
|
buf += l;
|
|
addr += l;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
|
|
#define MMUSUFFIX _cmmu
|
|
#define GETPC() NULL
|
|
#define env cpu_single_env
|
|
|
|
#define SHIFT 0
|
|
#include "softmmu_template.h"
|
|
|
|
#define SHIFT 1
|
|
#include "softmmu_template.h"
|
|
|
|
#define SHIFT 2
|
|
#include "softmmu_template.h"
|
|
|
|
#define SHIFT 3
|
|
#include "softmmu_template.h"
|
|
|
|
#undef env
|
|
|
|
#endif
|