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/*
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* virtual page mapping and translated block handling
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <inttypes.h> |
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#include <sys/mman.h> |
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#include "config.h" |
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#include "cpu.h" |
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#include "exec-all.h" |
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//#define DEBUG_TB_INVALIDATE
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//#define DEBUG_FLUSH
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/* make various TB consistency checks */
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//#define DEBUG_TB_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 CODE_GEN_MAX_BLOCKS (CODE_GEN_BUFFER_SIZE / 64) |
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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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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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/* XXX: pack the flags in the low bits of the pointer ? */
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typedef struct PageDesc { |
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unsigned long flags; |
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TranslationBlock *first_tb; |
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} PageDesc; |
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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 tb_invalidate_page(unsigned long address); |
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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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|
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/* io memory support */
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static unsigned long *l1_physmap[L1_SIZE]; |
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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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} |
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/* dump memory mappings */
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void page_dump(FILE *f)
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{ |
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unsigned long start, end; |
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int i, j, prot, prot1;
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PageDesc *p; |
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fprintf(f, "%-8s %-8s %-8s %s\n",
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"start", "end", "size", "prot"); |
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start = -1;
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end = -1;
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prot = 0;
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for(i = 0; i <= L1_SIZE; i++) { |
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if (i < L1_SIZE)
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p = l1_map[i]; |
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else
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p = NULL;
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for(j = 0;j < L2_SIZE; j++) { |
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if (!p)
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prot1 = 0;
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else
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prot1 = p[j].flags; |
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if (prot1 != prot) {
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end = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS);
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if (start != -1) { |
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fprintf(f, "%08lx-%08lx %08lx %c%c%c\n",
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start, end, end - start, |
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prot & PAGE_READ ? 'r' : '-', |
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prot & PAGE_WRITE ? 'w' : '-', |
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prot & PAGE_EXEC ? 'x' : '-'); |
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} |
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if (prot1 != 0) |
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start = end; |
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else
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start = -1;
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prot = prot1; |
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} |
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if (!p)
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break;
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} |
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} |
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} |
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static inline PageDesc *page_find_alloc(unsigned int index) |
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{ |
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PageDesc **lp, *p; |
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lp = &l1_map[index >> L2_BITS]; |
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p = *lp; |
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if (!p) {
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/* allocate if not found */
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p = malloc(sizeof(PageDesc) * L2_SIZE);
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memset(p, 0, sizeof(PageDesc) * L2_SIZE); |
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*lp = p; |
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} |
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return p + (index & (L2_SIZE - 1)); |
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} |
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static inline PageDesc *page_find(unsigned int index) |
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{ |
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PageDesc *p; |
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p = l1_map[index >> L2_BITS]; |
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if (!p)
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return 0; |
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return p + (index & (L2_SIZE - 1)); |
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} |
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int page_get_flags(unsigned long address) |
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{ |
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PageDesc *p; |
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p = page_find(address >> TARGET_PAGE_BITS); |
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if (!p)
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return 0; |
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return p->flags;
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} |
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/* modify the flags of a page and invalidate the code if
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necessary. The flag PAGE_WRITE_ORG is positionned automatically
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depending on PAGE_WRITE */
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void page_set_flags(unsigned long start, unsigned long end, int flags) |
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{ |
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PageDesc *p; |
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unsigned long addr; |
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start = start & TARGET_PAGE_MASK; |
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end = TARGET_PAGE_ALIGN(end); |
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if (flags & PAGE_WRITE)
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flags |= PAGE_WRITE_ORG; |
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spin_lock(&tb_lock); |
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for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
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p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
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/* if the write protection is set, then we invalidate the code
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inside */
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if (!(p->flags & PAGE_WRITE) &&
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(flags & PAGE_WRITE) && |
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p->first_tb) { |
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tb_invalidate_page(addr); |
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} |
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p->flags = flags; |
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} |
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spin_unlock(&tb_lock); |
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} |
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void cpu_exec_init(void) |
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{ |
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if (!code_gen_ptr) {
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code_gen_ptr = code_gen_buffer; |
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page_init(); |
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io_mem_init(); |
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} |
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} |
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/* 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[j].first_tb = NULL;
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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(void) |
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{ |
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int i;
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#ifdef 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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(code_gen_ptr - code_gen_buffer) / nb_tbs); |
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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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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; |
257 |
for(i = 0;i < CODE_GEN_HASH_SIZE; i++) { |
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for(tb = tb_hash[i]; tb != NULL; tb = tb->hash_next) { |
259 |
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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} |
283 |
} |
284 |
} |
285 |
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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; |
290 |
|
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/* suppress any remaining jumps to this TB */
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tb1 = tb->jmp_first; |
293 |
for(;;) {
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n1 = (long)tb1 & 3; |
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tb1 = (TranslationBlock *)((long)tb1 & ~3); |
296 |
if (n1 == 2) |
297 |
break;
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tb1 = tb1->jmp_next[n1]; |
299 |
} |
300 |
/* 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; |
315 |
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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} |
322 |
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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; |
327 |
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ptb = &tb->jmp_next[n]; |
329 |
tb1 = *ptb; |
330 |
if (tb1) {
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/* find tb(n) in circular list */
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for(;;) {
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tb1 = *ptb; |
334 |
n1 = (long)tb1 & 3; |
335 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
336 |
if (n1 == n && tb1 == tb)
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break;
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338 |
if (n1 == 2) { |
339 |
ptb = &tb1->jmp_first; |
340 |
} else {
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ptb = &tb1->jmp_next[n1]; |
342 |
} |
343 |
} |
344 |
/* now we can suppress tb(n) from the list */
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*ptb = tb->jmp_next[n]; |
346 |
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tb->jmp_next[n] = NULL;
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} |
349 |
} |
350 |
|
351 |
/* 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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353 |
static inline void tb_reset_jump(TranslationBlock *tb, int n) |
354 |
{ |
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tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); |
356 |
} |
357 |
|
358 |
static inline void tb_invalidate(TranslationBlock *tb, int parity) |
359 |
{ |
360 |
PageDesc *p; |
361 |
unsigned int page_index1, page_index2; |
362 |
unsigned int h, n1; |
363 |
TranslationBlock *tb1, *tb2; |
364 |
|
365 |
/* remove the TB from the hash list */
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366 |
h = tb_hash_func(tb->pc); |
367 |
tb_remove(&tb_hash[h], tb, |
368 |
offsetof(TranslationBlock, hash_next)); |
369 |
/* remove the TB from the page list */
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370 |
page_index1 = tb->pc >> TARGET_PAGE_BITS; |
371 |
if ((page_index1 & 1) == parity) { |
372 |
p = page_find(page_index1); |
373 |
tb_remove(&p->first_tb, tb, |
374 |
offsetof(TranslationBlock, page_next[page_index1 & 1]));
|
375 |
} |
376 |
page_index2 = (tb->pc + tb->size - 1) >> TARGET_PAGE_BITS;
|
377 |
if ((page_index2 & 1) == parity) { |
378 |
p = page_find(page_index2); |
379 |
tb_remove(&p->first_tb, tb, |
380 |
offsetof(TranslationBlock, page_next[page_index2 & 1]));
|
381 |
} |
382 |
|
383 |
/* suppress this TB from the two jump lists */
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384 |
tb_jmp_remove(tb, 0);
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385 |
tb_jmp_remove(tb, 1);
|
386 |
|
387 |
/* suppress any remaining jumps to this TB */
|
388 |
tb1 = tb->jmp_first; |
389 |
for(;;) {
|
390 |
n1 = (long)tb1 & 3; |
391 |
if (n1 == 2) |
392 |
break;
|
393 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
394 |
tb2 = tb1->jmp_next[n1]; |
395 |
tb_reset_jump(tb1, n1); |
396 |
tb1->jmp_next[n1] = NULL;
|
397 |
tb1 = tb2; |
398 |
} |
399 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ |
400 |
} |
401 |
|
402 |
/* invalidate all TBs which intersect with the target page starting at addr */
|
403 |
static void tb_invalidate_page(unsigned long address) |
404 |
{ |
405 |
TranslationBlock *tb_next, *tb; |
406 |
unsigned int page_index; |
407 |
int parity1, parity2;
|
408 |
PageDesc *p; |
409 |
#ifdef DEBUG_TB_INVALIDATE
|
410 |
printf("tb_invalidate_page: %lx\n", address);
|
411 |
#endif
|
412 |
|
413 |
page_index = address >> TARGET_PAGE_BITS; |
414 |
p = page_find(page_index); |
415 |
if (!p)
|
416 |
return;
|
417 |
tb = p->first_tb; |
418 |
parity1 = page_index & 1;
|
419 |
parity2 = parity1 ^ 1;
|
420 |
while (tb != NULL) { |
421 |
tb_next = tb->page_next[parity1]; |
422 |
tb_invalidate(tb, parity2); |
423 |
tb = tb_next; |
424 |
} |
425 |
p->first_tb = NULL;
|
426 |
} |
427 |
|
428 |
/* add the tb in the target page and protect it if necessary */
|
429 |
static inline void tb_alloc_page(TranslationBlock *tb, unsigned int page_index) |
430 |
{ |
431 |
PageDesc *p; |
432 |
unsigned long host_start, host_end, addr, page_addr; |
433 |
int prot;
|
434 |
|
435 |
p = page_find_alloc(page_index); |
436 |
tb->page_next[page_index & 1] = p->first_tb;
|
437 |
p->first_tb = tb; |
438 |
if (p->flags & PAGE_WRITE) {
|
439 |
/* force the host page as non writable (writes will have a
|
440 |
page fault + mprotect overhead) */
|
441 |
page_addr = (page_index << TARGET_PAGE_BITS); |
442 |
host_start = page_addr & host_page_mask; |
443 |
host_end = host_start + host_page_size; |
444 |
prot = 0;
|
445 |
for(addr = host_start; addr < host_end; addr += TARGET_PAGE_SIZE)
|
446 |
prot |= page_get_flags(addr); |
447 |
#if !defined(CONFIG_SOFTMMU)
|
448 |
mprotect((void *)host_start, host_page_size,
|
449 |
(prot & PAGE_BITS) & ~PAGE_WRITE); |
450 |
#endif
|
451 |
#if !defined(CONFIG_USER_ONLY)
|
452 |
/* suppress soft TLB */
|
453 |
/* XXX: must flush on all processor with same address space */
|
454 |
tlb_flush_page_write(cpu_single_env, host_start); |
455 |
#endif
|
456 |
#ifdef DEBUG_TB_INVALIDATE
|
457 |
printf("protecting code page: 0x%08lx\n",
|
458 |
host_start); |
459 |
#endif
|
460 |
p->flags &= ~PAGE_WRITE; |
461 |
} |
462 |
} |
463 |
|
464 |
/* Allocate a new translation block. Flush the translation buffer if
|
465 |
too many translation blocks or too much generated code. */
|
466 |
TranslationBlock *tb_alloc(unsigned long pc) |
467 |
{ |
468 |
TranslationBlock *tb; |
469 |
|
470 |
if (nb_tbs >= CODE_GEN_MAX_BLOCKS ||
|
471 |
(code_gen_ptr - code_gen_buffer) >= CODE_GEN_BUFFER_MAX_SIZE) |
472 |
return NULL; |
473 |
tb = &tbs[nb_tbs++]; |
474 |
tb->pc = pc; |
475 |
return tb;
|
476 |
} |
477 |
|
478 |
/* link the tb with the other TBs */
|
479 |
void tb_link(TranslationBlock *tb)
|
480 |
{ |
481 |
unsigned int page_index1, page_index2; |
482 |
|
483 |
/* add in the page list */
|
484 |
page_index1 = tb->pc >> TARGET_PAGE_BITS; |
485 |
tb_alloc_page(tb, page_index1); |
486 |
page_index2 = (tb->pc + tb->size - 1) >> TARGET_PAGE_BITS;
|
487 |
if (page_index2 != page_index1) {
|
488 |
tb_alloc_page(tb, page_index2); |
489 |
} |
490 |
#ifdef DEBUG_TB_CHECK
|
491 |
tb_page_check(); |
492 |
#endif
|
493 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); |
494 |
tb->jmp_next[0] = NULL; |
495 |
tb->jmp_next[1] = NULL; |
496 |
|
497 |
/* init original jump addresses */
|
498 |
if (tb->tb_next_offset[0] != 0xffff) |
499 |
tb_reset_jump(tb, 0);
|
500 |
if (tb->tb_next_offset[1] != 0xffff) |
501 |
tb_reset_jump(tb, 1);
|
502 |
} |
503 |
|
504 |
/* called from signal handler: invalidate the code and unprotect the
|
505 |
page. Return TRUE if the fault was succesfully handled. */
|
506 |
int page_unprotect(unsigned long address) |
507 |
{ |
508 |
unsigned int page_index, prot, pindex; |
509 |
PageDesc *p, *p1; |
510 |
unsigned long host_start, host_end, addr; |
511 |
|
512 |
host_start = address & host_page_mask; |
513 |
page_index = host_start >> TARGET_PAGE_BITS; |
514 |
p1 = page_find(page_index); |
515 |
if (!p1)
|
516 |
return 0; |
517 |
host_end = host_start + host_page_size; |
518 |
p = p1; |
519 |
prot = 0;
|
520 |
for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) {
|
521 |
prot |= p->flags; |
522 |
p++; |
523 |
} |
524 |
/* if the page was really writable, then we change its
|
525 |
protection back to writable */
|
526 |
if (prot & PAGE_WRITE_ORG) {
|
527 |
pindex = (address - host_start) >> TARGET_PAGE_BITS; |
528 |
if (!(p1[pindex].flags & PAGE_WRITE)) {
|
529 |
#if !defined(CONFIG_SOFTMMU)
|
530 |
mprotect((void *)host_start, host_page_size,
|
531 |
(prot & PAGE_BITS) | PAGE_WRITE); |
532 |
#endif
|
533 |
p1[pindex].flags |= PAGE_WRITE; |
534 |
/* and since the content will be modified, we must invalidate
|
535 |
the corresponding translated code. */
|
536 |
tb_invalidate_page(address); |
537 |
#ifdef DEBUG_TB_CHECK
|
538 |
tb_invalidate_check(address); |
539 |
#endif
|
540 |
return 1; |
541 |
} |
542 |
} |
543 |
return 0; |
544 |
} |
545 |
|
546 |
/* call this function when system calls directly modify a memory area */
|
547 |
void page_unprotect_range(uint8_t *data, unsigned long data_size) |
548 |
{ |
549 |
unsigned long start, end, addr; |
550 |
|
551 |
start = (unsigned long)data; |
552 |
end = start + data_size; |
553 |
start &= TARGET_PAGE_MASK; |
554 |
end = TARGET_PAGE_ALIGN(end); |
555 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
556 |
page_unprotect(addr); |
557 |
} |
558 |
} |
559 |
|
560 |
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
|
561 |
tb[1].tc_ptr. Return NULL if not found */
|
562 |
TranslationBlock *tb_find_pc(unsigned long tc_ptr) |
563 |
{ |
564 |
int m_min, m_max, m;
|
565 |
unsigned long v; |
566 |
TranslationBlock *tb; |
567 |
|
568 |
if (nb_tbs <= 0) |
569 |
return NULL; |
570 |
if (tc_ptr < (unsigned long)code_gen_buffer || |
571 |
tc_ptr >= (unsigned long)code_gen_ptr) |
572 |
return NULL; |
573 |
/* binary search (cf Knuth) */
|
574 |
m_min = 0;
|
575 |
m_max = nb_tbs - 1;
|
576 |
while (m_min <= m_max) {
|
577 |
m = (m_min + m_max) >> 1;
|
578 |
tb = &tbs[m]; |
579 |
v = (unsigned long)tb->tc_ptr; |
580 |
if (v == tc_ptr)
|
581 |
return tb;
|
582 |
else if (tc_ptr < v) { |
583 |
m_max = m - 1;
|
584 |
} else {
|
585 |
m_min = m + 1;
|
586 |
} |
587 |
} |
588 |
return &tbs[m_max];
|
589 |
} |
590 |
|
591 |
static void tb_reset_jump_recursive(TranslationBlock *tb); |
592 |
|
593 |
static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) |
594 |
{ |
595 |
TranslationBlock *tb1, *tb_next, **ptb; |
596 |
unsigned int n1; |
597 |
|
598 |
tb1 = tb->jmp_next[n]; |
599 |
if (tb1 != NULL) { |
600 |
/* find head of list */
|
601 |
for(;;) {
|
602 |
n1 = (long)tb1 & 3; |
603 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
604 |
if (n1 == 2) |
605 |
break;
|
606 |
tb1 = tb1->jmp_next[n1]; |
607 |
} |
608 |
/* we are now sure now that tb jumps to tb1 */
|
609 |
tb_next = tb1; |
610 |
|
611 |
/* remove tb from the jmp_first list */
|
612 |
ptb = &tb_next->jmp_first; |
613 |
for(;;) {
|
614 |
tb1 = *ptb; |
615 |
n1 = (long)tb1 & 3; |
616 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
617 |
if (n1 == n && tb1 == tb)
|
618 |
break;
|
619 |
ptb = &tb1->jmp_next[n1]; |
620 |
} |
621 |
*ptb = tb->jmp_next[n]; |
622 |
tb->jmp_next[n] = NULL;
|
623 |
|
624 |
/* suppress the jump to next tb in generated code */
|
625 |
tb_reset_jump(tb, n); |
626 |
|
627 |
/* suppress jumps in the tb on which we could have jump */
|
628 |
tb_reset_jump_recursive(tb_next); |
629 |
} |
630 |
} |
631 |
|
632 |
static void tb_reset_jump_recursive(TranslationBlock *tb) |
633 |
{ |
634 |
tb_reset_jump_recursive2(tb, 0);
|
635 |
tb_reset_jump_recursive2(tb, 1);
|
636 |
} |
637 |
|
638 |
/* add a breakpoint. EXCP_DEBUG is returned by the CPU loop if a
|
639 |
breakpoint is reached */
|
640 |
int cpu_breakpoint_insert(CPUState *env, uint32_t pc)
|
641 |
{ |
642 |
#if defined(TARGET_I386)
|
643 |
int i;
|
644 |
|
645 |
for(i = 0; i < env->nb_breakpoints; i++) { |
646 |
if (env->breakpoints[i] == pc)
|
647 |
return 0; |
648 |
} |
649 |
|
650 |
if (env->nb_breakpoints >= MAX_BREAKPOINTS)
|
651 |
return -1; |
652 |
env->breakpoints[env->nb_breakpoints++] = pc; |
653 |
tb_invalidate_page(pc); |
654 |
return 0; |
655 |
#else
|
656 |
return -1; |
657 |
#endif
|
658 |
} |
659 |
|
660 |
/* remove a breakpoint */
|
661 |
int cpu_breakpoint_remove(CPUState *env, uint32_t pc)
|
662 |
{ |
663 |
#if defined(TARGET_I386)
|
664 |
int i;
|
665 |
for(i = 0; i < env->nb_breakpoints; i++) { |
666 |
if (env->breakpoints[i] == pc)
|
667 |
goto found;
|
668 |
} |
669 |
return -1; |
670 |
found:
|
671 |
memmove(&env->breakpoints[i], &env->breakpoints[i + 1],
|
672 |
(env->nb_breakpoints - (i + 1)) * sizeof(env->breakpoints[0])); |
673 |
env->nb_breakpoints--; |
674 |
tb_invalidate_page(pc); |
675 |
return 0; |
676 |
#else
|
677 |
return -1; |
678 |
#endif
|
679 |
} |
680 |
|
681 |
/* enable or disable single step mode. EXCP_DEBUG is returned by the
|
682 |
CPU loop after each instruction */
|
683 |
void cpu_single_step(CPUState *env, int enabled) |
684 |
{ |
685 |
#if defined(TARGET_I386)
|
686 |
if (env->singlestep_enabled != enabled) {
|
687 |
env->singlestep_enabled = enabled; |
688 |
/* must flush all the translated code to avoid inconsistancies */
|
689 |
tb_flush(); |
690 |
} |
691 |
#endif
|
692 |
} |
693 |
|
694 |
/* enable or disable low levels log */
|
695 |
void cpu_set_log(int log_flags) |
696 |
{ |
697 |
loglevel = log_flags; |
698 |
if (loglevel && !logfile) {
|
699 |
logfile = fopen(logfilename, "w");
|
700 |
if (!logfile) {
|
701 |
perror(logfilename); |
702 |
_exit(1);
|
703 |
} |
704 |
setvbuf(logfile, NULL, _IOLBF, 0); |
705 |
} |
706 |
} |
707 |
|
708 |
void cpu_set_log_filename(const char *filename) |
709 |
{ |
710 |
logfilename = strdup(filename); |
711 |
} |
712 |
|
713 |
/* mask must never be zero */
|
714 |
void cpu_interrupt(CPUState *env, int mask) |
715 |
{ |
716 |
TranslationBlock *tb; |
717 |
|
718 |
env->interrupt_request |= mask; |
719 |
/* if the cpu is currently executing code, we must unlink it and
|
720 |
all the potentially executing TB */
|
721 |
tb = env->current_tb; |
722 |
if (tb) {
|
723 |
tb_reset_jump_recursive(tb); |
724 |
} |
725 |
} |
726 |
|
727 |
|
728 |
void cpu_abort(CPUState *env, const char *fmt, ...) |
729 |
{ |
730 |
va_list ap; |
731 |
|
732 |
va_start(ap, fmt); |
733 |
fprintf(stderr, "qemu: fatal: ");
|
734 |
vfprintf(stderr, fmt, ap); |
735 |
fprintf(stderr, "\n");
|
736 |
#ifdef TARGET_I386
|
737 |
cpu_x86_dump_state(env, stderr, X86_DUMP_FPU | X86_DUMP_CCOP); |
738 |
#endif
|
739 |
va_end(ap); |
740 |
abort(); |
741 |
} |
742 |
|
743 |
#ifdef TARGET_I386
|
744 |
/* unmap all maped pages and flush all associated code */
|
745 |
void page_unmap(void) |
746 |
{ |
747 |
PageDesc *pmap; |
748 |
int i;
|
749 |
|
750 |
for(i = 0; i < L1_SIZE; i++) { |
751 |
pmap = l1_map[i]; |
752 |
if (pmap) {
|
753 |
#if !defined(CONFIG_SOFTMMU)
|
754 |
PageDesc *p; |
755 |
unsigned long addr; |
756 |
int j, ret, j1;
|
757 |
|
758 |
p = pmap; |
759 |
for(j = 0;j < L2_SIZE;) { |
760 |
if (p->flags & PAGE_VALID) {
|
761 |
addr = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS);
|
762 |
/* we try to find a range to make less syscalls */
|
763 |
j1 = j; |
764 |
p++; |
765 |
j++; |
766 |
while (j < L2_SIZE && (p->flags & PAGE_VALID)) {
|
767 |
p++; |
768 |
j++; |
769 |
} |
770 |
ret = munmap((void *)addr, (j - j1) << TARGET_PAGE_BITS);
|
771 |
if (ret != 0) { |
772 |
fprintf(stderr, "Could not unmap page 0x%08lx\n", addr);
|
773 |
exit(1);
|
774 |
} |
775 |
} else {
|
776 |
p++; |
777 |
j++; |
778 |
} |
779 |
} |
780 |
#endif
|
781 |
free(pmap); |
782 |
l1_map[i] = NULL;
|
783 |
} |
784 |
} |
785 |
tb_flush(); |
786 |
} |
787 |
#endif
|
788 |
|
789 |
void tlb_flush(CPUState *env)
|
790 |
{ |
791 |
#if !defined(CONFIG_USER_ONLY)
|
792 |
int i;
|
793 |
for(i = 0; i < CPU_TLB_SIZE; i++) { |
794 |
env->tlb_read[0][i].address = -1; |
795 |
env->tlb_write[0][i].address = -1; |
796 |
env->tlb_read[1][i].address = -1; |
797 |
env->tlb_write[1][i].address = -1; |
798 |
} |
799 |
#endif
|
800 |
} |
801 |
|
802 |
static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, uint32_t addr) |
803 |
{ |
804 |
if (addr == (tlb_entry->address &
|
805 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK))) |
806 |
tlb_entry->address = -1;
|
807 |
} |
808 |
|
809 |
void tlb_flush_page(CPUState *env, uint32_t addr)
|
810 |
{ |
811 |
#if !defined(CONFIG_USER_ONLY)
|
812 |
int i;
|
813 |
|
814 |
addr &= TARGET_PAGE_MASK; |
815 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
816 |
tlb_flush_entry(&env->tlb_read[0][i], addr);
|
817 |
tlb_flush_entry(&env->tlb_write[0][i], addr);
|
818 |
tlb_flush_entry(&env->tlb_read[1][i], addr);
|
819 |
tlb_flush_entry(&env->tlb_write[1][i], addr);
|
820 |
#endif
|
821 |
} |
822 |
|
823 |
/* make all write to page 'addr' trigger a TLB exception to detect
|
824 |
self modifying code */
|
825 |
void tlb_flush_page_write(CPUState *env, uint32_t addr)
|
826 |
{ |
827 |
#if !defined(CONFIG_USER_ONLY)
|
828 |
int i;
|
829 |
|
830 |
addr &= TARGET_PAGE_MASK; |
831 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
832 |
tlb_flush_entry(&env->tlb_write[0][i], addr);
|
833 |
tlb_flush_entry(&env->tlb_write[1][i], addr);
|
834 |
#endif
|
835 |
} |
836 |
|
837 |
static inline unsigned long *physpage_find_alloc(unsigned int page) |
838 |
{ |
839 |
unsigned long **lp, *p; |
840 |
unsigned int index, i; |
841 |
|
842 |
index = page >> TARGET_PAGE_BITS; |
843 |
lp = &l1_physmap[index >> L2_BITS]; |
844 |
p = *lp; |
845 |
if (!p) {
|
846 |
/* allocate if not found */
|
847 |
p = malloc(sizeof(unsigned long) * L2_SIZE); |
848 |
for(i = 0; i < L2_SIZE; i++) |
849 |
p[i] = IO_MEM_UNASSIGNED; |
850 |
*lp = p; |
851 |
} |
852 |
return p + (index & (L2_SIZE - 1)); |
853 |
} |
854 |
|
855 |
/* return NULL if no page defined (unused memory) */
|
856 |
unsigned long physpage_find(unsigned long page) |
857 |
{ |
858 |
unsigned long *p; |
859 |
unsigned int index; |
860 |
index = page >> TARGET_PAGE_BITS; |
861 |
p = l1_physmap[index >> L2_BITS]; |
862 |
if (!p)
|
863 |
return IO_MEM_UNASSIGNED;
|
864 |
return p[index & (L2_SIZE - 1)]; |
865 |
} |
866 |
|
867 |
/* register physical memory. 'size' must be a multiple of the target
|
868 |
page size. If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
|
869 |
io memory page */
|
870 |
void cpu_register_physical_memory(unsigned long start_addr, unsigned long size, |
871 |
long phys_offset)
|
872 |
{ |
873 |
unsigned long addr, end_addr; |
874 |
unsigned long *p; |
875 |
|
876 |
end_addr = start_addr + size; |
877 |
for(addr = start_addr; addr < end_addr; addr += TARGET_PAGE_SIZE) {
|
878 |
p = physpage_find_alloc(addr); |
879 |
*p = phys_offset; |
880 |
if ((phys_offset & ~TARGET_PAGE_MASK) == 0) |
881 |
phys_offset += TARGET_PAGE_SIZE; |
882 |
} |
883 |
} |
884 |
|
885 |
static uint32_t unassigned_mem_readb(uint32_t addr)
|
886 |
{ |
887 |
return 0; |
888 |
} |
889 |
|
890 |
static void unassigned_mem_writeb(uint32_t addr, uint32_t val) |
891 |
{ |
892 |
} |
893 |
|
894 |
static CPUReadMemoryFunc *unassigned_mem_read[3] = { |
895 |
unassigned_mem_readb, |
896 |
unassigned_mem_readb, |
897 |
unassigned_mem_readb, |
898 |
}; |
899 |
|
900 |
static CPUWriteMemoryFunc *unassigned_mem_write[3] = { |
901 |
unassigned_mem_writeb, |
902 |
unassigned_mem_writeb, |
903 |
unassigned_mem_writeb, |
904 |
}; |
905 |
|
906 |
|
907 |
static void io_mem_init(void) |
908 |
{ |
909 |
io_mem_nb = 1;
|
910 |
cpu_register_io_memory(0, unassigned_mem_read, unassigned_mem_write);
|
911 |
} |
912 |
|
913 |
/* mem_read and mem_write are arrays of functions containing the
|
914 |
function to access byte (index 0), word (index 1) and dword (index
|
915 |
2). All functions must be supplied. If io_index is non zero, the
|
916 |
corresponding io zone is modified. If it is zero, a new io zone is
|
917 |
allocated. The return value can be used with
|
918 |
cpu_register_physical_memory(). (-1) is returned if error. */
|
919 |
int cpu_register_io_memory(int io_index, |
920 |
CPUReadMemoryFunc **mem_read, |
921 |
CPUWriteMemoryFunc **mem_write) |
922 |
{ |
923 |
int i;
|
924 |
|
925 |
if (io_index <= 0) { |
926 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
927 |
return -1; |
928 |
io_index = io_mem_nb++; |
929 |
} else {
|
930 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
931 |
return -1; |
932 |
} |
933 |
|
934 |
for(i = 0;i < 3; i++) { |
935 |
io_mem_read[io_index][i] = mem_read[i]; |
936 |
io_mem_write[io_index][i] = mem_write[i]; |
937 |
} |
938 |
return io_index << IO_MEM_SHIFT;
|
939 |
} |
940 |
|
941 |
#if !defined(CONFIG_USER_ONLY)
|
942 |
|
943 |
#define MMUSUFFIX _cmmu
|
944 |
#define GETPC() NULL |
945 |
#define env cpu_single_env
|
946 |
|
947 |
#define SHIFT 0 |
948 |
#include "softmmu_template.h" |
949 |
|
950 |
#define SHIFT 1 |
951 |
#include "softmmu_template.h" |
952 |
|
953 |
#define SHIFT 2 |
954 |
#include "softmmu_template.h" |
955 |
|
956 |
#define SHIFT 3 |
957 |
#include "softmmu_template.h" |
958 |
|
959 |
#undef env
|
960 |
|
961 |
#endif
|