root / exec.c @ 14ce26e7
History | View | Annotate | Download (63.4 kB)
| 1 |
/*
|
|---|---|
| 2 |
* virtual page mapping and translated block handling
|
| 3 |
*
|
| 4 |
* Copyright (c) 2003 Fabrice Bellard
|
| 5 |
*
|
| 6 |
* This library is free software; you can redistribute it and/or
|
| 7 |
* modify it under the terms of the GNU Lesser General Public
|
| 8 |
* License as published by the Free Software Foundation; either
|
| 9 |
* version 2 of the License, or (at your option) any later version.
|
| 10 |
*
|
| 11 |
* This library is distributed in the hope that it will be useful,
|
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
| 14 |
* Lesser General Public License for more details.
|
| 15 |
*
|
| 16 |
* You should have received a copy of the GNU Lesser General Public
|
| 17 |
* License along with this library; if not, write to the Free Software
|
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
| 19 |
*/
|
| 20 |
#include "config.h" |
| 21 |
#ifdef _WIN32
|
| 22 |
#include <windows.h> |
| 23 |
#else
|
| 24 |
#include <sys/types.h> |
| 25 |
#include <sys/mman.h> |
| 26 |
#endif
|
| 27 |
#include <stdlib.h> |
| 28 |
#include <stdio.h> |
| 29 |
#include <stdarg.h> |
| 30 |
#include <string.h> |
| 31 |
#include <errno.h> |
| 32 |
#include <unistd.h> |
| 33 |
#include <inttypes.h> |
| 34 |
|
| 35 |
#include "cpu.h" |
| 36 |
#include "exec-all.h" |
| 37 |
|
| 38 |
//#define DEBUG_TB_INVALIDATE
|
| 39 |
//#define DEBUG_FLUSH
|
| 40 |
//#define DEBUG_TLB
|
| 41 |
|
| 42 |
/* make various TB consistency checks */
|
| 43 |
//#define DEBUG_TB_CHECK
|
| 44 |
//#define DEBUG_TLB_CHECK
|
| 45 |
|
| 46 |
/* threshold to flush the translated code buffer */
|
| 47 |
#define CODE_GEN_BUFFER_MAX_SIZE (CODE_GEN_BUFFER_SIZE - CODE_GEN_MAX_SIZE)
|
| 48 |
|
| 49 |
#define SMC_BITMAP_USE_THRESHOLD 10 |
| 50 |
|
| 51 |
#define MMAP_AREA_START 0x00000000 |
| 52 |
#define MMAP_AREA_END 0xa8000000 |
| 53 |
|
| 54 |
TranslationBlock tbs[CODE_GEN_MAX_BLOCKS]; |
| 55 |
TranslationBlock *tb_hash[CODE_GEN_HASH_SIZE]; |
| 56 |
TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE]; |
| 57 |
int nb_tbs;
|
| 58 |
/* any access to the tbs or the page table must use this lock */
|
| 59 |
spinlock_t tb_lock = SPIN_LOCK_UNLOCKED; |
| 60 |
|
| 61 |
uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE]; |
| 62 |
uint8_t *code_gen_ptr; |
| 63 |
|
| 64 |
int phys_ram_size;
|
| 65 |
int phys_ram_fd;
|
| 66 |
uint8_t *phys_ram_base; |
| 67 |
uint8_t *phys_ram_dirty; |
| 68 |
|
| 69 |
typedef struct PageDesc { |
| 70 |
/* list of TBs intersecting this ram page */
|
| 71 |
TranslationBlock *first_tb; |
| 72 |
/* in order to optimize self modifying code, we count the number
|
| 73 |
of lookups we do to a given page to use a bitmap */
|
| 74 |
unsigned int code_write_count; |
| 75 |
uint8_t *code_bitmap; |
| 76 |
#if defined(CONFIG_USER_ONLY)
|
| 77 |
unsigned long flags; |
| 78 |
#endif
|
| 79 |
} PageDesc; |
| 80 |
|
| 81 |
typedef struct PhysPageDesc { |
| 82 |
/* offset in host memory of the page + io_index in the low 12 bits */
|
| 83 |
unsigned long phys_offset; |
| 84 |
} PhysPageDesc; |
| 85 |
|
| 86 |
typedef struct VirtPageDesc { |
| 87 |
/* physical address of code page. It is valid only if 'valid_tag'
|
| 88 |
matches 'virt_valid_tag' */
|
| 89 |
target_ulong phys_addr; |
| 90 |
unsigned int valid_tag; |
| 91 |
#if !defined(CONFIG_SOFTMMU)
|
| 92 |
/* original page access rights. It is valid only if 'valid_tag'
|
| 93 |
matches 'virt_valid_tag' */
|
| 94 |
unsigned int prot; |
| 95 |
#endif
|
| 96 |
} VirtPageDesc; |
| 97 |
|
| 98 |
#define L2_BITS 10 |
| 99 |
#define L1_BITS (32 - L2_BITS - TARGET_PAGE_BITS) |
| 100 |
|
| 101 |
#define L1_SIZE (1 << L1_BITS) |
| 102 |
#define L2_SIZE (1 << L2_BITS) |
| 103 |
|
| 104 |
static void io_mem_init(void); |
| 105 |
|
| 106 |
unsigned long qemu_real_host_page_size; |
| 107 |
unsigned long qemu_host_page_bits; |
| 108 |
unsigned long qemu_host_page_size; |
| 109 |
unsigned long qemu_host_page_mask; |
| 110 |
|
| 111 |
/* XXX: for system emulation, it could just be an array */
|
| 112 |
static PageDesc *l1_map[L1_SIZE];
|
| 113 |
static PhysPageDesc *l1_phys_map[L1_SIZE];
|
| 114 |
|
| 115 |
#if !defined(CONFIG_USER_ONLY)
|
| 116 |
static VirtPageDesc *l1_virt_map[L1_SIZE];
|
| 117 |
static unsigned int virt_valid_tag; |
| 118 |
#endif
|
| 119 |
|
| 120 |
/* io memory support */
|
| 121 |
CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
|
| 122 |
CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
|
| 123 |
void *io_mem_opaque[IO_MEM_NB_ENTRIES];
|
| 124 |
static int io_mem_nb; |
| 125 |
|
| 126 |
/* log support */
|
| 127 |
char *logfilename = "/tmp/qemu.log"; |
| 128 |
FILE *logfile; |
| 129 |
int loglevel;
|
| 130 |
|
| 131 |
static void page_init(void) |
| 132 |
{
|
| 133 |
/* NOTE: we can always suppose that qemu_host_page_size >=
|
| 134 |
TARGET_PAGE_SIZE */
|
| 135 |
#ifdef _WIN32
|
| 136 |
{
|
| 137 |
SYSTEM_INFO system_info; |
| 138 |
DWORD old_protect; |
| 139 |
|
| 140 |
GetSystemInfo(&system_info); |
| 141 |
qemu_real_host_page_size = system_info.dwPageSize; |
| 142 |
|
| 143 |
VirtualProtect(code_gen_buffer, sizeof(code_gen_buffer),
|
| 144 |
PAGE_EXECUTE_READWRITE, &old_protect); |
| 145 |
} |
| 146 |
#else
|
| 147 |
qemu_real_host_page_size = getpagesize(); |
| 148 |
{
|
| 149 |
unsigned long start, end; |
| 150 |
|
| 151 |
start = (unsigned long)code_gen_buffer; |
| 152 |
start &= ~(qemu_real_host_page_size - 1);
|
| 153 |
|
| 154 |
end = (unsigned long)code_gen_buffer + sizeof(code_gen_buffer); |
| 155 |
end += qemu_real_host_page_size - 1;
|
| 156 |
end &= ~(qemu_real_host_page_size - 1);
|
| 157 |
|
| 158 |
mprotect((void *)start, end - start,
|
| 159 |
PROT_READ | PROT_WRITE | PROT_EXEC); |
| 160 |
} |
| 161 |
#endif
|
| 162 |
|
| 163 |
if (qemu_host_page_size == 0) |
| 164 |
qemu_host_page_size = qemu_real_host_page_size; |
| 165 |
if (qemu_host_page_size < TARGET_PAGE_SIZE)
|
| 166 |
qemu_host_page_size = TARGET_PAGE_SIZE; |
| 167 |
qemu_host_page_bits = 0;
|
| 168 |
while ((1 << qemu_host_page_bits) < qemu_host_page_size) |
| 169 |
qemu_host_page_bits++; |
| 170 |
qemu_host_page_mask = ~(qemu_host_page_size - 1);
|
| 171 |
#if !defined(CONFIG_USER_ONLY)
|
| 172 |
virt_valid_tag = 1;
|
| 173 |
#endif
|
| 174 |
} |
| 175 |
|
| 176 |
static inline PageDesc *page_find_alloc(unsigned int index) |
| 177 |
{
|
| 178 |
PageDesc **lp, *p; |
| 179 |
|
| 180 |
lp = &l1_map[index >> L2_BITS]; |
| 181 |
p = *lp; |
| 182 |
if (!p) {
|
| 183 |
/* allocate if not found */
|
| 184 |
p = qemu_malloc(sizeof(PageDesc) * L2_SIZE);
|
| 185 |
memset(p, 0, sizeof(PageDesc) * L2_SIZE); |
| 186 |
*lp = p; |
| 187 |
} |
| 188 |
return p + (index & (L2_SIZE - 1)); |
| 189 |
} |
| 190 |
|
| 191 |
static inline PageDesc *page_find(unsigned int index) |
| 192 |
{
|
| 193 |
PageDesc *p; |
| 194 |
|
| 195 |
p = l1_map[index >> L2_BITS]; |
| 196 |
if (!p)
|
| 197 |
return 0; |
| 198 |
return p + (index & (L2_SIZE - 1)); |
| 199 |
} |
| 200 |
|
| 201 |
static inline PhysPageDesc *phys_page_find_alloc(unsigned int index) |
| 202 |
{
|
| 203 |
PhysPageDesc **lp, *p; |
| 204 |
|
| 205 |
lp = &l1_phys_map[index >> L2_BITS]; |
| 206 |
p = *lp; |
| 207 |
if (!p) {
|
| 208 |
/* allocate if not found */
|
| 209 |
p = qemu_malloc(sizeof(PhysPageDesc) * L2_SIZE);
|
| 210 |
memset(p, 0, sizeof(PhysPageDesc) * L2_SIZE); |
| 211 |
*lp = p; |
| 212 |
} |
| 213 |
return p + (index & (L2_SIZE - 1)); |
| 214 |
} |
| 215 |
|
| 216 |
static inline PhysPageDesc *phys_page_find(unsigned int index) |
| 217 |
{
|
| 218 |
PhysPageDesc *p; |
| 219 |
|
| 220 |
p = l1_phys_map[index >> L2_BITS]; |
| 221 |
if (!p)
|
| 222 |
return 0; |
| 223 |
return p + (index & (L2_SIZE - 1)); |
| 224 |
} |
| 225 |
|
| 226 |
#if !defined(CONFIG_USER_ONLY)
|
| 227 |
static void tlb_protect_code(CPUState *env, target_ulong addr); |
| 228 |
static void tlb_unprotect_code_phys(CPUState *env, unsigned long phys_addr, target_ulong vaddr); |
| 229 |
|
| 230 |
static inline VirtPageDesc *virt_page_find_alloc(unsigned int index) |
| 231 |
{
|
| 232 |
VirtPageDesc **lp, *p; |
| 233 |
|
| 234 |
/* XXX: should not truncate for 64 bit addresses */
|
| 235 |
#if TARGET_LONG_BITS > 32 |
| 236 |
index &= (L1_SIZE - 1);
|
| 237 |
#endif
|
| 238 |
lp = &l1_virt_map[index >> L2_BITS]; |
| 239 |
p = *lp; |
| 240 |
if (!p) {
|
| 241 |
/* allocate if not found */
|
| 242 |
p = qemu_malloc(sizeof(VirtPageDesc) * L2_SIZE);
|
| 243 |
memset(p, 0, sizeof(VirtPageDesc) * L2_SIZE); |
| 244 |
*lp = p; |
| 245 |
} |
| 246 |
return p + (index & (L2_SIZE - 1)); |
| 247 |
} |
| 248 |
|
| 249 |
static inline VirtPageDesc *virt_page_find(unsigned int index) |
| 250 |
{
|
| 251 |
VirtPageDesc *p; |
| 252 |
|
| 253 |
p = l1_virt_map[index >> L2_BITS]; |
| 254 |
if (!p)
|
| 255 |
return 0; |
| 256 |
return p + (index & (L2_SIZE - 1)); |
| 257 |
} |
| 258 |
|
| 259 |
static void virt_page_flush(void) |
| 260 |
{
|
| 261 |
int i, j;
|
| 262 |
VirtPageDesc *p; |
| 263 |
|
| 264 |
virt_valid_tag++; |
| 265 |
|
| 266 |
if (virt_valid_tag == 0) { |
| 267 |
virt_valid_tag = 1;
|
| 268 |
for(i = 0; i < L1_SIZE; i++) { |
| 269 |
p = l1_virt_map[i]; |
| 270 |
if (p) {
|
| 271 |
for(j = 0; j < L2_SIZE; j++) |
| 272 |
p[j].valid_tag = 0;
|
| 273 |
} |
| 274 |
} |
| 275 |
} |
| 276 |
} |
| 277 |
#else
|
| 278 |
static void virt_page_flush(void) |
| 279 |
{
|
| 280 |
} |
| 281 |
#endif
|
| 282 |
|
| 283 |
void cpu_exec_init(void) |
| 284 |
{
|
| 285 |
if (!code_gen_ptr) {
|
| 286 |
code_gen_ptr = code_gen_buffer; |
| 287 |
page_init(); |
| 288 |
io_mem_init(); |
| 289 |
} |
| 290 |
} |
| 291 |
|
| 292 |
static inline void invalidate_page_bitmap(PageDesc *p) |
| 293 |
{
|
| 294 |
if (p->code_bitmap) {
|
| 295 |
qemu_free(p->code_bitmap); |
| 296 |
p->code_bitmap = NULL;
|
| 297 |
} |
| 298 |
p->code_write_count = 0;
|
| 299 |
} |
| 300 |
|
| 301 |
/* set to NULL all the 'first_tb' fields in all PageDescs */
|
| 302 |
static void page_flush_tb(void) |
| 303 |
{
|
| 304 |
int i, j;
|
| 305 |
PageDesc *p; |
| 306 |
|
| 307 |
for(i = 0; i < L1_SIZE; i++) { |
| 308 |
p = l1_map[i]; |
| 309 |
if (p) {
|
| 310 |
for(j = 0; j < L2_SIZE; j++) { |
| 311 |
p->first_tb = NULL;
|
| 312 |
invalidate_page_bitmap(p); |
| 313 |
p++; |
| 314 |
} |
| 315 |
} |
| 316 |
} |
| 317 |
} |
| 318 |
|
| 319 |
/* flush all the translation blocks */
|
| 320 |
/* XXX: tb_flush is currently not thread safe */
|
| 321 |
void tb_flush(CPUState *env)
|
| 322 |
{
|
| 323 |
#if defined(DEBUG_FLUSH)
|
| 324 |
printf("qemu: flush code_size=%d nb_tbs=%d avg_tb_size=%d\n",
|
| 325 |
code_gen_ptr - code_gen_buffer, |
| 326 |
nb_tbs, |
| 327 |
nb_tbs > 0 ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0); |
| 328 |
#endif
|
| 329 |
nb_tbs = 0;
|
| 330 |
memset (tb_hash, 0, CODE_GEN_HASH_SIZE * sizeof (void *)); |
| 331 |
virt_page_flush(); |
| 332 |
|
| 333 |
memset (tb_phys_hash, 0, CODE_GEN_PHYS_HASH_SIZE * sizeof (void *)); |
| 334 |
page_flush_tb(); |
| 335 |
|
| 336 |
code_gen_ptr = code_gen_buffer; |
| 337 |
/* XXX: flush processor icache at this point if cache flush is
|
| 338 |
expensive */
|
| 339 |
} |
| 340 |
|
| 341 |
#ifdef DEBUG_TB_CHECK
|
| 342 |
|
| 343 |
static void tb_invalidate_check(unsigned long address) |
| 344 |
{
|
| 345 |
TranslationBlock *tb; |
| 346 |
int i;
|
| 347 |
address &= TARGET_PAGE_MASK; |
| 348 |
for(i = 0;i < CODE_GEN_HASH_SIZE; i++) { |
| 349 |
for(tb = tb_hash[i]; tb != NULL; tb = tb->hash_next) { |
| 350 |
if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
|
| 351 |
address >= tb->pc + tb->size)) {
|
| 352 |
printf("ERROR invalidate: address=%08lx PC=%08lx size=%04x\n",
|
| 353 |
address, tb->pc, tb->size); |
| 354 |
} |
| 355 |
} |
| 356 |
} |
| 357 |
} |
| 358 |
|
| 359 |
/* verify that all the pages have correct rights for code */
|
| 360 |
static void tb_page_check(void) |
| 361 |
{
|
| 362 |
TranslationBlock *tb; |
| 363 |
int i, flags1, flags2;
|
| 364 |
|
| 365 |
for(i = 0;i < CODE_GEN_HASH_SIZE; i++) { |
| 366 |
for(tb = tb_hash[i]; tb != NULL; tb = tb->hash_next) { |
| 367 |
flags1 = page_get_flags(tb->pc); |
| 368 |
flags2 = page_get_flags(tb->pc + tb->size - 1);
|
| 369 |
if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
|
| 370 |
printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
|
| 371 |
tb->pc, tb->size, flags1, flags2); |
| 372 |
} |
| 373 |
} |
| 374 |
} |
| 375 |
} |
| 376 |
|
| 377 |
void tb_jmp_check(TranslationBlock *tb)
|
| 378 |
{
|
| 379 |
TranslationBlock *tb1; |
| 380 |
unsigned int n1; |
| 381 |
|
| 382 |
/* suppress any remaining jumps to this TB */
|
| 383 |
tb1 = tb->jmp_first; |
| 384 |
for(;;) {
|
| 385 |
n1 = (long)tb1 & 3; |
| 386 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 387 |
if (n1 == 2) |
| 388 |
break;
|
| 389 |
tb1 = tb1->jmp_next[n1]; |
| 390 |
} |
| 391 |
/* check end of list */
|
| 392 |
if (tb1 != tb) {
|
| 393 |
printf("ERROR: jmp_list from 0x%08lx\n", (long)tb); |
| 394 |
} |
| 395 |
} |
| 396 |
|
| 397 |
#endif
|
| 398 |
|
| 399 |
/* invalidate one TB */
|
| 400 |
static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb, |
| 401 |
int next_offset)
|
| 402 |
{
|
| 403 |
TranslationBlock *tb1; |
| 404 |
for(;;) {
|
| 405 |
tb1 = *ptb; |
| 406 |
if (tb1 == tb) {
|
| 407 |
*ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
|
| 408 |
break;
|
| 409 |
} |
| 410 |
ptb = (TranslationBlock **)((char *)tb1 + next_offset);
|
| 411 |
} |
| 412 |
} |
| 413 |
|
| 414 |
static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) |
| 415 |
{
|
| 416 |
TranslationBlock *tb1; |
| 417 |
unsigned int n1; |
| 418 |
|
| 419 |
for(;;) {
|
| 420 |
tb1 = *ptb; |
| 421 |
n1 = (long)tb1 & 3; |
| 422 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 423 |
if (tb1 == tb) {
|
| 424 |
*ptb = tb1->page_next[n1]; |
| 425 |
break;
|
| 426 |
} |
| 427 |
ptb = &tb1->page_next[n1]; |
| 428 |
} |
| 429 |
} |
| 430 |
|
| 431 |
static inline void tb_jmp_remove(TranslationBlock *tb, int n) |
| 432 |
{
|
| 433 |
TranslationBlock *tb1, **ptb; |
| 434 |
unsigned int n1; |
| 435 |
|
| 436 |
ptb = &tb->jmp_next[n]; |
| 437 |
tb1 = *ptb; |
| 438 |
if (tb1) {
|
| 439 |
/* find tb(n) in circular list */
|
| 440 |
for(;;) {
|
| 441 |
tb1 = *ptb; |
| 442 |
n1 = (long)tb1 & 3; |
| 443 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 444 |
if (n1 == n && tb1 == tb)
|
| 445 |
break;
|
| 446 |
if (n1 == 2) { |
| 447 |
ptb = &tb1->jmp_first; |
| 448 |
} else {
|
| 449 |
ptb = &tb1->jmp_next[n1]; |
| 450 |
} |
| 451 |
} |
| 452 |
/* now we can suppress tb(n) from the list */
|
| 453 |
*ptb = tb->jmp_next[n]; |
| 454 |
|
| 455 |
tb->jmp_next[n] = NULL;
|
| 456 |
} |
| 457 |
} |
| 458 |
|
| 459 |
/* reset the jump entry 'n' of a TB so that it is not chained to
|
| 460 |
another TB */
|
| 461 |
static inline void tb_reset_jump(TranslationBlock *tb, int n) |
| 462 |
{
|
| 463 |
tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); |
| 464 |
} |
| 465 |
|
| 466 |
static inline void tb_invalidate(TranslationBlock *tb) |
| 467 |
{
|
| 468 |
unsigned int h, n1; |
| 469 |
TranslationBlock *tb1, *tb2, **ptb; |
| 470 |
|
| 471 |
tb_invalidated_flag = 1;
|
| 472 |
|
| 473 |
/* remove the TB from the hash list */
|
| 474 |
h = tb_hash_func(tb->pc); |
| 475 |
ptb = &tb_hash[h]; |
| 476 |
for(;;) {
|
| 477 |
tb1 = *ptb; |
| 478 |
/* NOTE: the TB is not necessarily linked in the hash. It
|
| 479 |
indicates that it is not currently used */
|
| 480 |
if (tb1 == NULL) |
| 481 |
return;
|
| 482 |
if (tb1 == tb) {
|
| 483 |
*ptb = tb1->hash_next; |
| 484 |
break;
|
| 485 |
} |
| 486 |
ptb = &tb1->hash_next; |
| 487 |
} |
| 488 |
|
| 489 |
/* suppress this TB from the two jump lists */
|
| 490 |
tb_jmp_remove(tb, 0);
|
| 491 |
tb_jmp_remove(tb, 1);
|
| 492 |
|
| 493 |
/* suppress any remaining jumps to this TB */
|
| 494 |
tb1 = tb->jmp_first; |
| 495 |
for(;;) {
|
| 496 |
n1 = (long)tb1 & 3; |
| 497 |
if (n1 == 2) |
| 498 |
break;
|
| 499 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 500 |
tb2 = tb1->jmp_next[n1]; |
| 501 |
tb_reset_jump(tb1, n1); |
| 502 |
tb1->jmp_next[n1] = NULL;
|
| 503 |
tb1 = tb2; |
| 504 |
} |
| 505 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ |
| 506 |
} |
| 507 |
|
| 508 |
static inline void tb_phys_invalidate(TranslationBlock *tb, unsigned int page_addr) |
| 509 |
{
|
| 510 |
PageDesc *p; |
| 511 |
unsigned int h; |
| 512 |
target_ulong phys_pc; |
| 513 |
|
| 514 |
/* remove the TB from the hash list */
|
| 515 |
phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
| 516 |
h = tb_phys_hash_func(phys_pc); |
| 517 |
tb_remove(&tb_phys_hash[h], tb, |
| 518 |
offsetof(TranslationBlock, phys_hash_next)); |
| 519 |
|
| 520 |
/* remove the TB from the page list */
|
| 521 |
if (tb->page_addr[0] != page_addr) { |
| 522 |
p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
|
| 523 |
tb_page_remove(&p->first_tb, tb); |
| 524 |
invalidate_page_bitmap(p); |
| 525 |
} |
| 526 |
if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { |
| 527 |
p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
|
| 528 |
tb_page_remove(&p->first_tb, tb); |
| 529 |
invalidate_page_bitmap(p); |
| 530 |
} |
| 531 |
|
| 532 |
tb_invalidate(tb); |
| 533 |
} |
| 534 |
|
| 535 |
static inline void set_bits(uint8_t *tab, int start, int len) |
| 536 |
{
|
| 537 |
int end, mask, end1;
|
| 538 |
|
| 539 |
end = start + len; |
| 540 |
tab += start >> 3;
|
| 541 |
mask = 0xff << (start & 7); |
| 542 |
if ((start & ~7) == (end & ~7)) { |
| 543 |
if (start < end) {
|
| 544 |
mask &= ~(0xff << (end & 7)); |
| 545 |
*tab |= mask; |
| 546 |
} |
| 547 |
} else {
|
| 548 |
*tab++ |= mask; |
| 549 |
start = (start + 8) & ~7; |
| 550 |
end1 = end & ~7;
|
| 551 |
while (start < end1) {
|
| 552 |
*tab++ = 0xff;
|
| 553 |
start += 8;
|
| 554 |
} |
| 555 |
if (start < end) {
|
| 556 |
mask = ~(0xff << (end & 7)); |
| 557 |
*tab |= mask; |
| 558 |
} |
| 559 |
} |
| 560 |
} |
| 561 |
|
| 562 |
static void build_page_bitmap(PageDesc *p) |
| 563 |
{
|
| 564 |
int n, tb_start, tb_end;
|
| 565 |
TranslationBlock *tb; |
| 566 |
|
| 567 |
p->code_bitmap = qemu_malloc(TARGET_PAGE_SIZE / 8);
|
| 568 |
if (!p->code_bitmap)
|
| 569 |
return;
|
| 570 |
memset(p->code_bitmap, 0, TARGET_PAGE_SIZE / 8); |
| 571 |
|
| 572 |
tb = p->first_tb; |
| 573 |
while (tb != NULL) { |
| 574 |
n = (long)tb & 3; |
| 575 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 576 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
| 577 |
if (n == 0) { |
| 578 |
/* NOTE: tb_end may be after the end of the page, but
|
| 579 |
it is not a problem */
|
| 580 |
tb_start = tb->pc & ~TARGET_PAGE_MASK; |
| 581 |
tb_end = tb_start + tb->size; |
| 582 |
if (tb_end > TARGET_PAGE_SIZE)
|
| 583 |
tb_end = TARGET_PAGE_SIZE; |
| 584 |
} else {
|
| 585 |
tb_start = 0;
|
| 586 |
tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| 587 |
} |
| 588 |
set_bits(p->code_bitmap, tb_start, tb_end - tb_start); |
| 589 |
tb = tb->page_next[n]; |
| 590 |
} |
| 591 |
} |
| 592 |
|
| 593 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 594 |
|
| 595 |
static void tb_gen_code(CPUState *env, |
| 596 |
target_ulong pc, target_ulong cs_base, int flags,
|
| 597 |
int cflags)
|
| 598 |
{
|
| 599 |
TranslationBlock *tb; |
| 600 |
uint8_t *tc_ptr; |
| 601 |
target_ulong phys_pc, phys_page2, virt_page2; |
| 602 |
int code_gen_size;
|
| 603 |
|
| 604 |
phys_pc = get_phys_addr_code(env, pc); |
| 605 |
tb = tb_alloc(pc); |
| 606 |
if (!tb) {
|
| 607 |
/* flush must be done */
|
| 608 |
tb_flush(env); |
| 609 |
/* cannot fail at this point */
|
| 610 |
tb = tb_alloc(pc); |
| 611 |
} |
| 612 |
tc_ptr = code_gen_ptr; |
| 613 |
tb->tc_ptr = tc_ptr; |
| 614 |
tb->cs_base = cs_base; |
| 615 |
tb->flags = flags; |
| 616 |
tb->cflags = cflags; |
| 617 |
cpu_gen_code(env, tb, CODE_GEN_MAX_SIZE, &code_gen_size); |
| 618 |
code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); |
| 619 |
|
| 620 |
/* check next page if needed */
|
| 621 |
virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
|
| 622 |
phys_page2 = -1;
|
| 623 |
if ((pc & TARGET_PAGE_MASK) != virt_page2) {
|
| 624 |
phys_page2 = get_phys_addr_code(env, virt_page2); |
| 625 |
} |
| 626 |
tb_link_phys(tb, phys_pc, phys_page2); |
| 627 |
} |
| 628 |
#endif
|
| 629 |
|
| 630 |
/* invalidate all TBs which intersect with the target physical page
|
| 631 |
starting in range [start;end[. NOTE: start and end must refer to
|
| 632 |
the same physical page. 'is_cpu_write_access' should be true if called
|
| 633 |
from a real cpu write access: the virtual CPU will exit the current
|
| 634 |
TB if code is modified inside this TB. */
|
| 635 |
void tb_invalidate_phys_page_range(target_ulong start, target_ulong end,
|
| 636 |
int is_cpu_write_access)
|
| 637 |
{
|
| 638 |
int n, current_tb_modified, current_tb_not_found, current_flags;
|
| 639 |
CPUState *env = cpu_single_env; |
| 640 |
PageDesc *p; |
| 641 |
TranslationBlock *tb, *tb_next, *current_tb, *saved_tb; |
| 642 |
target_ulong tb_start, tb_end; |
| 643 |
target_ulong current_pc, current_cs_base; |
| 644 |
|
| 645 |
p = page_find(start >> TARGET_PAGE_BITS); |
| 646 |
if (!p)
|
| 647 |
return;
|
| 648 |
if (!p->code_bitmap &&
|
| 649 |
++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD && |
| 650 |
is_cpu_write_access) {
|
| 651 |
/* build code bitmap */
|
| 652 |
build_page_bitmap(p); |
| 653 |
} |
| 654 |
|
| 655 |
/* we remove all the TBs in the range [start, end[ */
|
| 656 |
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
| 657 |
current_tb_not_found = is_cpu_write_access; |
| 658 |
current_tb_modified = 0;
|
| 659 |
current_tb = NULL; /* avoid warning */ |
| 660 |
current_pc = 0; /* avoid warning */ |
| 661 |
current_cs_base = 0; /* avoid warning */ |
| 662 |
current_flags = 0; /* avoid warning */ |
| 663 |
tb = p->first_tb; |
| 664 |
while (tb != NULL) { |
| 665 |
n = (long)tb & 3; |
| 666 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 667 |
tb_next = tb->page_next[n]; |
| 668 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
| 669 |
if (n == 0) { |
| 670 |
/* NOTE: tb_end may be after the end of the page, but
|
| 671 |
it is not a problem */
|
| 672 |
tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
| 673 |
tb_end = tb_start + tb->size; |
| 674 |
} else {
|
| 675 |
tb_start = tb->page_addr[1];
|
| 676 |
tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| 677 |
} |
| 678 |
if (!(tb_end <= start || tb_start >= end)) {
|
| 679 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 680 |
if (current_tb_not_found) {
|
| 681 |
current_tb_not_found = 0;
|
| 682 |
current_tb = NULL;
|
| 683 |
if (env->mem_write_pc) {
|
| 684 |
/* now we have a real cpu fault */
|
| 685 |
current_tb = tb_find_pc(env->mem_write_pc); |
| 686 |
} |
| 687 |
} |
| 688 |
if (current_tb == tb &&
|
| 689 |
!(current_tb->cflags & CF_SINGLE_INSN)) {
|
| 690 |
/* If we are modifying the current TB, we must stop
|
| 691 |
its execution. We could be more precise by checking
|
| 692 |
that the modification is after the current PC, but it
|
| 693 |
would require a specialized function to partially
|
| 694 |
restore the CPU state */
|
| 695 |
|
| 696 |
current_tb_modified = 1;
|
| 697 |
cpu_restore_state(current_tb, env, |
| 698 |
env->mem_write_pc, NULL);
|
| 699 |
#if defined(TARGET_I386)
|
| 700 |
current_flags = env->hflags; |
| 701 |
current_flags |= (env->eflags & (IOPL_MASK | TF_MASK | VM_MASK)); |
| 702 |
current_cs_base = (target_ulong)env->segs[R_CS].base; |
| 703 |
current_pc = current_cs_base + env->eip; |
| 704 |
#else
|
| 705 |
#error unsupported CPU
|
| 706 |
#endif
|
| 707 |
} |
| 708 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
| 709 |
saved_tb = env->current_tb; |
| 710 |
env->current_tb = NULL;
|
| 711 |
tb_phys_invalidate(tb, -1);
|
| 712 |
env->current_tb = saved_tb; |
| 713 |
if (env->interrupt_request && env->current_tb)
|
| 714 |
cpu_interrupt(env, env->interrupt_request); |
| 715 |
} |
| 716 |
tb = tb_next; |
| 717 |
} |
| 718 |
#if !defined(CONFIG_USER_ONLY)
|
| 719 |
/* if no code remaining, no need to continue to use slow writes */
|
| 720 |
if (!p->first_tb) {
|
| 721 |
invalidate_page_bitmap(p); |
| 722 |
if (is_cpu_write_access) {
|
| 723 |
tlb_unprotect_code_phys(env, start, env->mem_write_vaddr); |
| 724 |
} |
| 725 |
} |
| 726 |
#endif
|
| 727 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 728 |
if (current_tb_modified) {
|
| 729 |
/* we generate a block containing just the instruction
|
| 730 |
modifying the memory. It will ensure that it cannot modify
|
| 731 |
itself */
|
| 732 |
env->current_tb = NULL;
|
| 733 |
tb_gen_code(env, current_pc, current_cs_base, current_flags, |
| 734 |
CF_SINGLE_INSN); |
| 735 |
cpu_resume_from_signal(env, NULL);
|
| 736 |
} |
| 737 |
#endif
|
| 738 |
} |
| 739 |
|
| 740 |
/* len must be <= 8 and start must be a multiple of len */
|
| 741 |
static inline void tb_invalidate_phys_page_fast(target_ulong start, int len) |
| 742 |
{
|
| 743 |
PageDesc *p; |
| 744 |
int offset, b;
|
| 745 |
#if 0
|
| 746 |
if (1) {
|
| 747 |
if (loglevel) {
|
| 748 |
fprintf(logfile, "modifying code at 0x%x size=%d EIP=%x PC=%08x\n",
|
| 749 |
cpu_single_env->mem_write_vaddr, len,
|
| 750 |
cpu_single_env->eip,
|
| 751 |
cpu_single_env->eip + (long)cpu_single_env->segs[R_CS].base);
|
| 752 |
}
|
| 753 |
}
|
| 754 |
#endif
|
| 755 |
p = page_find(start >> TARGET_PAGE_BITS); |
| 756 |
if (!p)
|
| 757 |
return;
|
| 758 |
if (p->code_bitmap) {
|
| 759 |
offset = start & ~TARGET_PAGE_MASK; |
| 760 |
b = p->code_bitmap[offset >> 3] >> (offset & 7); |
| 761 |
if (b & ((1 << len) - 1)) |
| 762 |
goto do_invalidate;
|
| 763 |
} else {
|
| 764 |
do_invalidate:
|
| 765 |
tb_invalidate_phys_page_range(start, start + len, 1);
|
| 766 |
} |
| 767 |
} |
| 768 |
|
| 769 |
#if !defined(CONFIG_SOFTMMU)
|
| 770 |
static void tb_invalidate_phys_page(target_ulong addr, |
| 771 |
unsigned long pc, void *puc) |
| 772 |
{
|
| 773 |
int n, current_flags, current_tb_modified;
|
| 774 |
target_ulong current_pc, current_cs_base; |
| 775 |
PageDesc *p; |
| 776 |
TranslationBlock *tb, *current_tb; |
| 777 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 778 |
CPUState *env = cpu_single_env; |
| 779 |
#endif
|
| 780 |
|
| 781 |
addr &= TARGET_PAGE_MASK; |
| 782 |
p = page_find(addr >> TARGET_PAGE_BITS); |
| 783 |
if (!p)
|
| 784 |
return;
|
| 785 |
tb = p->first_tb; |
| 786 |
current_tb_modified = 0;
|
| 787 |
current_tb = NULL;
|
| 788 |
current_pc = 0; /* avoid warning */ |
| 789 |
current_cs_base = 0; /* avoid warning */ |
| 790 |
current_flags = 0; /* avoid warning */ |
| 791 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 792 |
if (tb && pc != 0) { |
| 793 |
current_tb = tb_find_pc(pc); |
| 794 |
} |
| 795 |
#endif
|
| 796 |
while (tb != NULL) { |
| 797 |
n = (long)tb & 3; |
| 798 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 799 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 800 |
if (current_tb == tb &&
|
| 801 |
!(current_tb->cflags & CF_SINGLE_INSN)) {
|
| 802 |
/* If we are modifying the current TB, we must stop
|
| 803 |
its execution. We could be more precise by checking
|
| 804 |
that the modification is after the current PC, but it
|
| 805 |
would require a specialized function to partially
|
| 806 |
restore the CPU state */
|
| 807 |
|
| 808 |
current_tb_modified = 1;
|
| 809 |
cpu_restore_state(current_tb, env, pc, puc); |
| 810 |
#if defined(TARGET_I386)
|
| 811 |
current_flags = env->hflags; |
| 812 |
current_flags |= (env->eflags & (IOPL_MASK | TF_MASK | VM_MASK)); |
| 813 |
current_cs_base = (target_ulong)env->segs[R_CS].base; |
| 814 |
current_pc = current_cs_base + env->eip; |
| 815 |
#else
|
| 816 |
#error unsupported CPU
|
| 817 |
#endif
|
| 818 |
} |
| 819 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
| 820 |
tb_phys_invalidate(tb, addr); |
| 821 |
tb = tb->page_next[n]; |
| 822 |
} |
| 823 |
p->first_tb = NULL;
|
| 824 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 825 |
if (current_tb_modified) {
|
| 826 |
/* we generate a block containing just the instruction
|
| 827 |
modifying the memory. It will ensure that it cannot modify
|
| 828 |
itself */
|
| 829 |
env->current_tb = NULL;
|
| 830 |
tb_gen_code(env, current_pc, current_cs_base, current_flags, |
| 831 |
CF_SINGLE_INSN); |
| 832 |
cpu_resume_from_signal(env, puc); |
| 833 |
} |
| 834 |
#endif
|
| 835 |
} |
| 836 |
#endif
|
| 837 |
|
| 838 |
/* add the tb in the target page and protect it if necessary */
|
| 839 |
static inline void tb_alloc_page(TranslationBlock *tb, |
| 840 |
unsigned int n, unsigned int page_addr) |
| 841 |
{
|
| 842 |
PageDesc *p; |
| 843 |
TranslationBlock *last_first_tb; |
| 844 |
|
| 845 |
tb->page_addr[n] = page_addr; |
| 846 |
p = page_find(page_addr >> TARGET_PAGE_BITS); |
| 847 |
tb->page_next[n] = p->first_tb; |
| 848 |
last_first_tb = p->first_tb; |
| 849 |
p->first_tb = (TranslationBlock *)((long)tb | n);
|
| 850 |
invalidate_page_bitmap(p); |
| 851 |
|
| 852 |
#if defined(TARGET_HAS_SMC) || 1 |
| 853 |
|
| 854 |
#if defined(CONFIG_USER_ONLY)
|
| 855 |
if (p->flags & PAGE_WRITE) {
|
| 856 |
unsigned long host_start, host_end, addr; |
| 857 |
int prot;
|
| 858 |
|
| 859 |
/* force the host page as non writable (writes will have a
|
| 860 |
page fault + mprotect overhead) */
|
| 861 |
host_start = page_addr & qemu_host_page_mask; |
| 862 |
host_end = host_start + qemu_host_page_size; |
| 863 |
prot = 0;
|
| 864 |
for(addr = host_start; addr < host_end; addr += TARGET_PAGE_SIZE)
|
| 865 |
prot |= page_get_flags(addr); |
| 866 |
mprotect((void *)host_start, qemu_host_page_size,
|
| 867 |
(prot & PAGE_BITS) & ~PAGE_WRITE); |
| 868 |
#ifdef DEBUG_TB_INVALIDATE
|
| 869 |
printf("protecting code page: 0x%08lx\n",
|
| 870 |
host_start); |
| 871 |
#endif
|
| 872 |
p->flags &= ~PAGE_WRITE; |
| 873 |
} |
| 874 |
#else
|
| 875 |
/* if some code is already present, then the pages are already
|
| 876 |
protected. So we handle the case where only the first TB is
|
| 877 |
allocated in a physical page */
|
| 878 |
if (!last_first_tb) {
|
| 879 |
target_ulong virt_addr; |
| 880 |
|
| 881 |
virt_addr = (tb->pc & TARGET_PAGE_MASK) + (n << TARGET_PAGE_BITS); |
| 882 |
tlb_protect_code(cpu_single_env, virt_addr); |
| 883 |
} |
| 884 |
#endif
|
| 885 |
|
| 886 |
#endif /* TARGET_HAS_SMC */ |
| 887 |
} |
| 888 |
|
| 889 |
/* Allocate a new translation block. Flush the translation buffer if
|
| 890 |
too many translation blocks or too much generated code. */
|
| 891 |
TranslationBlock *tb_alloc(target_ulong pc) |
| 892 |
{
|
| 893 |
TranslationBlock *tb; |
| 894 |
|
| 895 |
if (nb_tbs >= CODE_GEN_MAX_BLOCKS ||
|
| 896 |
(code_gen_ptr - code_gen_buffer) >= CODE_GEN_BUFFER_MAX_SIZE) |
| 897 |
return NULL; |
| 898 |
tb = &tbs[nb_tbs++]; |
| 899 |
tb->pc = pc; |
| 900 |
tb->cflags = 0;
|
| 901 |
return tb;
|
| 902 |
} |
| 903 |
|
| 904 |
/* add a new TB and link it to the physical page tables. phys_page2 is
|
| 905 |
(-1) to indicate that only one page contains the TB. */
|
| 906 |
void tb_link_phys(TranslationBlock *tb,
|
| 907 |
target_ulong phys_pc, target_ulong phys_page2) |
| 908 |
{
|
| 909 |
unsigned int h; |
| 910 |
TranslationBlock **ptb; |
| 911 |
|
| 912 |
/* add in the physical hash table */
|
| 913 |
h = tb_phys_hash_func(phys_pc); |
| 914 |
ptb = &tb_phys_hash[h]; |
| 915 |
tb->phys_hash_next = *ptb; |
| 916 |
*ptb = tb; |
| 917 |
|
| 918 |
/* add in the page list */
|
| 919 |
tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
|
| 920 |
if (phys_page2 != -1) |
| 921 |
tb_alloc_page(tb, 1, phys_page2);
|
| 922 |
else
|
| 923 |
tb->page_addr[1] = -1; |
| 924 |
#ifdef DEBUG_TB_CHECK
|
| 925 |
tb_page_check(); |
| 926 |
#endif
|
| 927 |
} |
| 928 |
|
| 929 |
/* link the tb with the other TBs */
|
| 930 |
void tb_link(TranslationBlock *tb)
|
| 931 |
{
|
| 932 |
#if !defined(CONFIG_USER_ONLY)
|
| 933 |
{
|
| 934 |
VirtPageDesc *vp; |
| 935 |
target_ulong addr; |
| 936 |
|
| 937 |
/* save the code memory mappings (needed to invalidate the code) */
|
| 938 |
addr = tb->pc & TARGET_PAGE_MASK; |
| 939 |
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS); |
| 940 |
#ifdef DEBUG_TLB_CHECK
|
| 941 |
if (vp->valid_tag == virt_valid_tag &&
|
| 942 |
vp->phys_addr != tb->page_addr[0]) {
|
| 943 |
printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n",
|
| 944 |
addr, tb->page_addr[0], vp->phys_addr);
|
| 945 |
} |
| 946 |
#endif
|
| 947 |
vp->phys_addr = tb->page_addr[0];
|
| 948 |
if (vp->valid_tag != virt_valid_tag) {
|
| 949 |
vp->valid_tag = virt_valid_tag; |
| 950 |
#if !defined(CONFIG_SOFTMMU)
|
| 951 |
vp->prot = 0;
|
| 952 |
#endif
|
| 953 |
} |
| 954 |
|
| 955 |
if (tb->page_addr[1] != -1) { |
| 956 |
addr += TARGET_PAGE_SIZE; |
| 957 |
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS); |
| 958 |
#ifdef DEBUG_TLB_CHECK
|
| 959 |
if (vp->valid_tag == virt_valid_tag &&
|
| 960 |
vp->phys_addr != tb->page_addr[1]) {
|
| 961 |
printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n",
|
| 962 |
addr, tb->page_addr[1], vp->phys_addr);
|
| 963 |
} |
| 964 |
#endif
|
| 965 |
vp->phys_addr = tb->page_addr[1];
|
| 966 |
if (vp->valid_tag != virt_valid_tag) {
|
| 967 |
vp->valid_tag = virt_valid_tag; |
| 968 |
#if !defined(CONFIG_SOFTMMU)
|
| 969 |
vp->prot = 0;
|
| 970 |
#endif
|
| 971 |
} |
| 972 |
} |
| 973 |
} |
| 974 |
#endif
|
| 975 |
|
| 976 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); |
| 977 |
tb->jmp_next[0] = NULL; |
| 978 |
tb->jmp_next[1] = NULL; |
| 979 |
#ifdef USE_CODE_COPY
|
| 980 |
tb->cflags &= ~CF_FP_USED; |
| 981 |
if (tb->cflags & CF_TB_FP_USED)
|
| 982 |
tb->cflags |= CF_FP_USED; |
| 983 |
#endif
|
| 984 |
|
| 985 |
/* init original jump addresses */
|
| 986 |
if (tb->tb_next_offset[0] != 0xffff) |
| 987 |
tb_reset_jump(tb, 0);
|
| 988 |
if (tb->tb_next_offset[1] != 0xffff) |
| 989 |
tb_reset_jump(tb, 1);
|
| 990 |
} |
| 991 |
|
| 992 |
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
|
| 993 |
tb[1].tc_ptr. Return NULL if not found */
|
| 994 |
TranslationBlock *tb_find_pc(unsigned long tc_ptr) |
| 995 |
{
|
| 996 |
int m_min, m_max, m;
|
| 997 |
unsigned long v; |
| 998 |
TranslationBlock *tb; |
| 999 |
|
| 1000 |
if (nb_tbs <= 0) |
| 1001 |
return NULL; |
| 1002 |
if (tc_ptr < (unsigned long)code_gen_buffer || |
| 1003 |
tc_ptr >= (unsigned long)code_gen_ptr) |
| 1004 |
return NULL; |
| 1005 |
/* binary search (cf Knuth) */
|
| 1006 |
m_min = 0;
|
| 1007 |
m_max = nb_tbs - 1;
|
| 1008 |
while (m_min <= m_max) {
|
| 1009 |
m = (m_min + m_max) >> 1;
|
| 1010 |
tb = &tbs[m]; |
| 1011 |
v = (unsigned long)tb->tc_ptr; |
| 1012 |
if (v == tc_ptr)
|
| 1013 |
return tb;
|
| 1014 |
else if (tc_ptr < v) { |
| 1015 |
m_max = m - 1;
|
| 1016 |
} else {
|
| 1017 |
m_min = m + 1;
|
| 1018 |
} |
| 1019 |
} |
| 1020 |
return &tbs[m_max];
|
| 1021 |
} |
| 1022 |
|
| 1023 |
static void tb_reset_jump_recursive(TranslationBlock *tb); |
| 1024 |
|
| 1025 |
static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) |
| 1026 |
{
|
| 1027 |
TranslationBlock *tb1, *tb_next, **ptb; |
| 1028 |
unsigned int n1; |
| 1029 |
|
| 1030 |
tb1 = tb->jmp_next[n]; |
| 1031 |
if (tb1 != NULL) { |
| 1032 |
/* find head of list */
|
| 1033 |
for(;;) {
|
| 1034 |
n1 = (long)tb1 & 3; |
| 1035 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 1036 |
if (n1 == 2) |
| 1037 |
break;
|
| 1038 |
tb1 = tb1->jmp_next[n1]; |
| 1039 |
} |
| 1040 |
/* we are now sure now that tb jumps to tb1 */
|
| 1041 |
tb_next = tb1; |
| 1042 |
|
| 1043 |
/* remove tb from the jmp_first list */
|
| 1044 |
ptb = &tb_next->jmp_first; |
| 1045 |
for(;;) {
|
| 1046 |
tb1 = *ptb; |
| 1047 |
n1 = (long)tb1 & 3; |
| 1048 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 1049 |
if (n1 == n && tb1 == tb)
|
| 1050 |
break;
|
| 1051 |
ptb = &tb1->jmp_next[n1]; |
| 1052 |
} |
| 1053 |
*ptb = tb->jmp_next[n]; |
| 1054 |
tb->jmp_next[n] = NULL;
|
| 1055 |
|
| 1056 |
/* suppress the jump to next tb in generated code */
|
| 1057 |
tb_reset_jump(tb, n); |
| 1058 |
|
| 1059 |
/* suppress jumps in the tb on which we could have jumped */
|
| 1060 |
tb_reset_jump_recursive(tb_next); |
| 1061 |
} |
| 1062 |
} |
| 1063 |
|
| 1064 |
static void tb_reset_jump_recursive(TranslationBlock *tb) |
| 1065 |
{
|
| 1066 |
tb_reset_jump_recursive2(tb, 0);
|
| 1067 |
tb_reset_jump_recursive2(tb, 1);
|
| 1068 |
} |
| 1069 |
|
| 1070 |
#if defined(TARGET_I386) || defined(TARGET_PPC) || defined(TARGET_SPARC)
|
| 1071 |
static void breakpoint_invalidate(CPUState *env, target_ulong pc) |
| 1072 |
{
|
| 1073 |
target_ulong phys_addr; |
| 1074 |
|
| 1075 |
phys_addr = cpu_get_phys_page_debug(env, pc); |
| 1076 |
tb_invalidate_phys_page_range(phys_addr, phys_addr + 1, 0); |
| 1077 |
} |
| 1078 |
#endif
|
| 1079 |
|
| 1080 |
/* add a breakpoint. EXCP_DEBUG is returned by the CPU loop if a
|
| 1081 |
breakpoint is reached */
|
| 1082 |
int cpu_breakpoint_insert(CPUState *env, target_ulong pc)
|
| 1083 |
{
|
| 1084 |
#if defined(TARGET_I386) || defined(TARGET_PPC) || defined(TARGET_SPARC)
|
| 1085 |
int i;
|
| 1086 |
|
| 1087 |
for(i = 0; i < env->nb_breakpoints; i++) { |
| 1088 |
if (env->breakpoints[i] == pc)
|
| 1089 |
return 0; |
| 1090 |
} |
| 1091 |
|
| 1092 |
if (env->nb_breakpoints >= MAX_BREAKPOINTS)
|
| 1093 |
return -1; |
| 1094 |
env->breakpoints[env->nb_breakpoints++] = pc; |
| 1095 |
|
| 1096 |
breakpoint_invalidate(env, pc); |
| 1097 |
return 0; |
| 1098 |
#else
|
| 1099 |
return -1; |
| 1100 |
#endif
|
| 1101 |
} |
| 1102 |
|
| 1103 |
/* remove a breakpoint */
|
| 1104 |
int cpu_breakpoint_remove(CPUState *env, target_ulong pc)
|
| 1105 |
{
|
| 1106 |
#if defined(TARGET_I386) || defined(TARGET_PPC) || defined(TARGET_SPARC)
|
| 1107 |
int i;
|
| 1108 |
for(i = 0; i < env->nb_breakpoints; i++) { |
| 1109 |
if (env->breakpoints[i] == pc)
|
| 1110 |
goto found;
|
| 1111 |
} |
| 1112 |
return -1; |
| 1113 |
found:
|
| 1114 |
memmove(&env->breakpoints[i], &env->breakpoints[i + 1],
|
| 1115 |
(env->nb_breakpoints - (i + 1)) * sizeof(env->breakpoints[0])); |
| 1116 |
env->nb_breakpoints--; |
| 1117 |
|
| 1118 |
breakpoint_invalidate(env, pc); |
| 1119 |
return 0; |
| 1120 |
#else
|
| 1121 |
return -1; |
| 1122 |
#endif
|
| 1123 |
} |
| 1124 |
|
| 1125 |
/* enable or disable single step mode. EXCP_DEBUG is returned by the
|
| 1126 |
CPU loop after each instruction */
|
| 1127 |
void cpu_single_step(CPUState *env, int enabled) |
| 1128 |
{
|
| 1129 |
#if defined(TARGET_I386) || defined(TARGET_PPC) || defined(TARGET_SPARC)
|
| 1130 |
if (env->singlestep_enabled != enabled) {
|
| 1131 |
env->singlestep_enabled = enabled; |
| 1132 |
/* must flush all the translated code to avoid inconsistancies */
|
| 1133 |
/* XXX: only flush what is necessary */
|
| 1134 |
tb_flush(env); |
| 1135 |
} |
| 1136 |
#endif
|
| 1137 |
} |
| 1138 |
|
| 1139 |
/* enable or disable low levels log */
|
| 1140 |
void cpu_set_log(int log_flags) |
| 1141 |
{
|
| 1142 |
loglevel = log_flags; |
| 1143 |
if (loglevel && !logfile) {
|
| 1144 |
logfile = fopen(logfilename, "w");
|
| 1145 |
if (!logfile) {
|
| 1146 |
perror(logfilename); |
| 1147 |
_exit(1);
|
| 1148 |
} |
| 1149 |
#if !defined(CONFIG_SOFTMMU)
|
| 1150 |
/* must avoid mmap() usage of glibc by setting a buffer "by hand" */
|
| 1151 |
{
|
| 1152 |
static uint8_t logfile_buf[4096]; |
| 1153 |
setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
|
| 1154 |
} |
| 1155 |
#else
|
| 1156 |
setvbuf(logfile, NULL, _IOLBF, 0); |
| 1157 |
#endif
|
| 1158 |
} |
| 1159 |
} |
| 1160 |
|
| 1161 |
void cpu_set_log_filename(const char *filename) |
| 1162 |
{
|
| 1163 |
logfilename = strdup(filename); |
| 1164 |
} |
| 1165 |
|
| 1166 |
/* mask must never be zero, except for A20 change call */
|
| 1167 |
void cpu_interrupt(CPUState *env, int mask) |
| 1168 |
{
|
| 1169 |
TranslationBlock *tb; |
| 1170 |
static int interrupt_lock; |
| 1171 |
|
| 1172 |
env->interrupt_request |= mask; |
| 1173 |
/* if the cpu is currently executing code, we must unlink it and
|
| 1174 |
all the potentially executing TB */
|
| 1175 |
tb = env->current_tb; |
| 1176 |
if (tb && !testandset(&interrupt_lock)) {
|
| 1177 |
env->current_tb = NULL;
|
| 1178 |
tb_reset_jump_recursive(tb); |
| 1179 |
interrupt_lock = 0;
|
| 1180 |
} |
| 1181 |
} |
| 1182 |
|
| 1183 |
void cpu_reset_interrupt(CPUState *env, int mask) |
| 1184 |
{
|
| 1185 |
env->interrupt_request &= ~mask; |
| 1186 |
} |
| 1187 |
|
| 1188 |
CPULogItem cpu_log_items[] = {
|
| 1189 |
{ CPU_LOG_TB_OUT_ASM, "out_asm",
|
| 1190 |
"show generated host assembly code for each compiled TB" },
|
| 1191 |
{ CPU_LOG_TB_IN_ASM, "in_asm",
|
| 1192 |
"show target assembly code for each compiled TB" },
|
| 1193 |
{ CPU_LOG_TB_OP, "op",
|
| 1194 |
"show micro ops for each compiled TB (only usable if 'in_asm' used)" },
|
| 1195 |
#ifdef TARGET_I386
|
| 1196 |
{ CPU_LOG_TB_OP_OPT, "op_opt",
|
| 1197 |
"show micro ops after optimization for each compiled TB" },
|
| 1198 |
#endif
|
| 1199 |
{ CPU_LOG_INT, "int",
|
| 1200 |
"show interrupts/exceptions in short format" },
|
| 1201 |
{ CPU_LOG_EXEC, "exec",
|
| 1202 |
"show trace before each executed TB (lots of logs)" },
|
| 1203 |
{ CPU_LOG_TB_CPU, "cpu",
|
| 1204 |
"show CPU state before bloc translation" },
|
| 1205 |
#ifdef TARGET_I386
|
| 1206 |
{ CPU_LOG_PCALL, "pcall",
|
| 1207 |
"show protected mode far calls/returns/exceptions" },
|
| 1208 |
#endif
|
| 1209 |
#ifdef DEBUG_IOPORT
|
| 1210 |
{ CPU_LOG_IOPORT, "ioport",
|
| 1211 |
"show all i/o ports accesses" },
|
| 1212 |
#endif
|
| 1213 |
{ 0, NULL, NULL },
|
| 1214 |
}; |
| 1215 |
|
| 1216 |
static int cmp1(const char *s1, int n, const char *s2) |
| 1217 |
{
|
| 1218 |
if (strlen(s2) != n)
|
| 1219 |
return 0; |
| 1220 |
return memcmp(s1, s2, n) == 0; |
| 1221 |
} |
| 1222 |
|
| 1223 |
/* takes a comma separated list of log masks. Return 0 if error. */
|
| 1224 |
int cpu_str_to_log_mask(const char *str) |
| 1225 |
{
|
| 1226 |
CPULogItem *item; |
| 1227 |
int mask;
|
| 1228 |
const char *p, *p1; |
| 1229 |
|
| 1230 |
p = str; |
| 1231 |
mask = 0;
|
| 1232 |
for(;;) {
|
| 1233 |
p1 = strchr(p, ',');
|
| 1234 |
if (!p1)
|
| 1235 |
p1 = p + strlen(p); |
| 1236 |
if(cmp1(p,p1-p,"all")) { |
| 1237 |
for(item = cpu_log_items; item->mask != 0; item++) { |
| 1238 |
mask |= item->mask; |
| 1239 |
} |
| 1240 |
} else {
|
| 1241 |
for(item = cpu_log_items; item->mask != 0; item++) { |
| 1242 |
if (cmp1(p, p1 - p, item->name))
|
| 1243 |
goto found;
|
| 1244 |
} |
| 1245 |
return 0; |
| 1246 |
} |
| 1247 |
found:
|
| 1248 |
mask |= item->mask; |
| 1249 |
if (*p1 != ',') |
| 1250 |
break;
|
| 1251 |
p = p1 + 1;
|
| 1252 |
} |
| 1253 |
return mask;
|
| 1254 |
} |
| 1255 |
|
| 1256 |
void cpu_abort(CPUState *env, const char *fmt, ...) |
| 1257 |
{
|
| 1258 |
va_list ap; |
| 1259 |
|
| 1260 |
va_start(ap, fmt); |
| 1261 |
fprintf(stderr, "qemu: fatal: ");
|
| 1262 |
vfprintf(stderr, fmt, ap); |
| 1263 |
fprintf(stderr, "\n");
|
| 1264 |
#ifdef TARGET_I386
|
| 1265 |
cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP); |
| 1266 |
#else
|
| 1267 |
cpu_dump_state(env, stderr, fprintf, 0);
|
| 1268 |
#endif
|
| 1269 |
va_end(ap); |
| 1270 |
abort(); |
| 1271 |
} |
| 1272 |
|
| 1273 |
#if !defined(CONFIG_USER_ONLY)
|
| 1274 |
|
| 1275 |
/* NOTE: if flush_global is true, also flush global entries (not
|
| 1276 |
implemented yet) */
|
| 1277 |
void tlb_flush(CPUState *env, int flush_global) |
| 1278 |
{
|
| 1279 |
int i;
|
| 1280 |
|
| 1281 |
#if defined(DEBUG_TLB)
|
| 1282 |
printf("tlb_flush:\n");
|
| 1283 |
#endif
|
| 1284 |
/* must reset current TB so that interrupts cannot modify the
|
| 1285 |
links while we are modifying them */
|
| 1286 |
env->current_tb = NULL;
|
| 1287 |
|
| 1288 |
for(i = 0; i < CPU_TLB_SIZE; i++) { |
| 1289 |
env->tlb_read[0][i].address = -1; |
| 1290 |
env->tlb_write[0][i].address = -1; |
| 1291 |
env->tlb_read[1][i].address = -1; |
| 1292 |
env->tlb_write[1][i].address = -1; |
| 1293 |
} |
| 1294 |
|
| 1295 |
virt_page_flush(); |
| 1296 |
memset (tb_hash, 0, CODE_GEN_HASH_SIZE * sizeof (void *)); |
| 1297 |
|
| 1298 |
#if !defined(CONFIG_SOFTMMU)
|
| 1299 |
munmap((void *)MMAP_AREA_START, MMAP_AREA_END - MMAP_AREA_START);
|
| 1300 |
#endif
|
| 1301 |
} |
| 1302 |
|
| 1303 |
static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr) |
| 1304 |
{
|
| 1305 |
if (addr == (tlb_entry->address &
|
| 1306 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK))) |
| 1307 |
tlb_entry->address = -1;
|
| 1308 |
} |
| 1309 |
|
| 1310 |
void tlb_flush_page(CPUState *env, target_ulong addr)
|
| 1311 |
{
|
| 1312 |
int i, n;
|
| 1313 |
VirtPageDesc *vp; |
| 1314 |
PageDesc *p; |
| 1315 |
TranslationBlock *tb; |
| 1316 |
|
| 1317 |
#if defined(DEBUG_TLB)
|
| 1318 |
printf("tlb_flush_page: 0x%08x\n", addr);
|
| 1319 |
#endif
|
| 1320 |
/* must reset current TB so that interrupts cannot modify the
|
| 1321 |
links while we are modifying them */
|
| 1322 |
env->current_tb = NULL;
|
| 1323 |
|
| 1324 |
addr &= TARGET_PAGE_MASK; |
| 1325 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 1326 |
tlb_flush_entry(&env->tlb_read[0][i], addr);
|
| 1327 |
tlb_flush_entry(&env->tlb_write[0][i], addr);
|
| 1328 |
tlb_flush_entry(&env->tlb_read[1][i], addr);
|
| 1329 |
tlb_flush_entry(&env->tlb_write[1][i], addr);
|
| 1330 |
|
| 1331 |
/* remove from the virtual pc hash table all the TB at this
|
| 1332 |
virtual address */
|
| 1333 |
|
| 1334 |
vp = virt_page_find(addr >> TARGET_PAGE_BITS); |
| 1335 |
if (vp && vp->valid_tag == virt_valid_tag) {
|
| 1336 |
p = page_find(vp->phys_addr >> TARGET_PAGE_BITS); |
| 1337 |
if (p) {
|
| 1338 |
/* we remove all the links to the TBs in this virtual page */
|
| 1339 |
tb = p->first_tb; |
| 1340 |
while (tb != NULL) { |
| 1341 |
n = (long)tb & 3; |
| 1342 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 1343 |
if ((tb->pc & TARGET_PAGE_MASK) == addr ||
|
| 1344 |
((tb->pc + tb->size - 1) & TARGET_PAGE_MASK) == addr) {
|
| 1345 |
tb_invalidate(tb); |
| 1346 |
} |
| 1347 |
tb = tb->page_next[n]; |
| 1348 |
} |
| 1349 |
} |
| 1350 |
vp->valid_tag = 0;
|
| 1351 |
} |
| 1352 |
|
| 1353 |
#if !defined(CONFIG_SOFTMMU)
|
| 1354 |
if (addr < MMAP_AREA_END)
|
| 1355 |
munmap((void *)addr, TARGET_PAGE_SIZE);
|
| 1356 |
#endif
|
| 1357 |
} |
| 1358 |
|
| 1359 |
static inline void tlb_protect_code1(CPUTLBEntry *tlb_entry, target_ulong addr) |
| 1360 |
{
|
| 1361 |
if (addr == (tlb_entry->address &
|
| 1362 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) && |
| 1363 |
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_CODE && |
| 1364 |
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_ROM) {
|
| 1365 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_CODE; |
| 1366 |
} |
| 1367 |
} |
| 1368 |
|
| 1369 |
/* update the TLBs so that writes to code in the virtual page 'addr'
|
| 1370 |
can be detected */
|
| 1371 |
static void tlb_protect_code(CPUState *env, target_ulong addr) |
| 1372 |
{
|
| 1373 |
int i;
|
| 1374 |
|
| 1375 |
addr &= TARGET_PAGE_MASK; |
| 1376 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 1377 |
tlb_protect_code1(&env->tlb_write[0][i], addr);
|
| 1378 |
tlb_protect_code1(&env->tlb_write[1][i], addr);
|
| 1379 |
#if !defined(CONFIG_SOFTMMU)
|
| 1380 |
/* NOTE: as we generated the code for this page, it is already at
|
| 1381 |
least readable */
|
| 1382 |
if (addr < MMAP_AREA_END)
|
| 1383 |
mprotect((void *)addr, TARGET_PAGE_SIZE, PROT_READ);
|
| 1384 |
#endif
|
| 1385 |
} |
| 1386 |
|
| 1387 |
static inline void tlb_unprotect_code2(CPUTLBEntry *tlb_entry, |
| 1388 |
unsigned long phys_addr) |
| 1389 |
{
|
| 1390 |
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE &&
|
| 1391 |
((tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend) == phys_addr) {
|
| 1392 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY; |
| 1393 |
} |
| 1394 |
} |
| 1395 |
|
| 1396 |
/* update the TLB so that writes in physical page 'phys_addr' are no longer
|
| 1397 |
tested self modifying code */
|
| 1398 |
static void tlb_unprotect_code_phys(CPUState *env, unsigned long phys_addr, target_ulong vaddr) |
| 1399 |
{
|
| 1400 |
int i;
|
| 1401 |
|
| 1402 |
phys_addr &= TARGET_PAGE_MASK; |
| 1403 |
phys_addr += (long)phys_ram_base;
|
| 1404 |
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 1405 |
tlb_unprotect_code2(&env->tlb_write[0][i], phys_addr);
|
| 1406 |
tlb_unprotect_code2(&env->tlb_write[1][i], phys_addr);
|
| 1407 |
} |
| 1408 |
|
| 1409 |
static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry, |
| 1410 |
unsigned long start, unsigned long length) |
| 1411 |
{
|
| 1412 |
unsigned long addr; |
| 1413 |
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
|
| 1414 |
addr = (tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend; |
| 1415 |
if ((addr - start) < length) {
|
| 1416 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY; |
| 1417 |
} |
| 1418 |
} |
| 1419 |
} |
| 1420 |
|
| 1421 |
void cpu_physical_memory_reset_dirty(target_ulong start, target_ulong end)
|
| 1422 |
{
|
| 1423 |
CPUState *env; |
| 1424 |
unsigned long length, start1; |
| 1425 |
int i;
|
| 1426 |
|
| 1427 |
start &= TARGET_PAGE_MASK; |
| 1428 |
end = TARGET_PAGE_ALIGN(end); |
| 1429 |
|
| 1430 |
length = end - start; |
| 1431 |
if (length == 0) |
| 1432 |
return;
|
| 1433 |
memset(phys_ram_dirty + (start >> TARGET_PAGE_BITS), 0, length >> TARGET_PAGE_BITS);
|
| 1434 |
|
| 1435 |
env = cpu_single_env; |
| 1436 |
/* we modify the TLB cache so that the dirty bit will be set again
|
| 1437 |
when accessing the range */
|
| 1438 |
start1 = start + (unsigned long)phys_ram_base; |
| 1439 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
| 1440 |
tlb_reset_dirty_range(&env->tlb_write[0][i], start1, length);
|
| 1441 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
| 1442 |
tlb_reset_dirty_range(&env->tlb_write[1][i], start1, length);
|
| 1443 |
|
| 1444 |
#if !defined(CONFIG_SOFTMMU)
|
| 1445 |
/* XXX: this is expensive */
|
| 1446 |
{
|
| 1447 |
VirtPageDesc *p; |
| 1448 |
int j;
|
| 1449 |
target_ulong addr; |
| 1450 |
|
| 1451 |
for(i = 0; i < L1_SIZE; i++) { |
| 1452 |
p = l1_virt_map[i]; |
| 1453 |
if (p) {
|
| 1454 |
addr = i << (TARGET_PAGE_BITS + L2_BITS); |
| 1455 |
for(j = 0; j < L2_SIZE; j++) { |
| 1456 |
if (p->valid_tag == virt_valid_tag &&
|
| 1457 |
p->phys_addr >= start && p->phys_addr < end && |
| 1458 |
(p->prot & PROT_WRITE)) {
|
| 1459 |
if (addr < MMAP_AREA_END) {
|
| 1460 |
mprotect((void *)addr, TARGET_PAGE_SIZE,
|
| 1461 |
p->prot & ~PROT_WRITE); |
| 1462 |
} |
| 1463 |
} |
| 1464 |
addr += TARGET_PAGE_SIZE; |
| 1465 |
p++; |
| 1466 |
} |
| 1467 |
} |
| 1468 |
} |
| 1469 |
} |
| 1470 |
#endif
|
| 1471 |
} |
| 1472 |
|
| 1473 |
static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, |
| 1474 |
unsigned long start) |
| 1475 |
{
|
| 1476 |
unsigned long addr; |
| 1477 |
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_NOTDIRTY) {
|
| 1478 |
addr = (tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend; |
| 1479 |
if (addr == start) {
|
| 1480 |
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_RAM; |
| 1481 |
} |
| 1482 |
} |
| 1483 |
} |
| 1484 |
|
| 1485 |
/* update the TLB corresponding to virtual page vaddr and phys addr
|
| 1486 |
addr so that it is no longer dirty */
|
| 1487 |
static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr) |
| 1488 |
{
|
| 1489 |
CPUState *env = cpu_single_env; |
| 1490 |
int i;
|
| 1491 |
|
| 1492 |
phys_ram_dirty[(addr - (unsigned long)phys_ram_base) >> TARGET_PAGE_BITS] = 1; |
| 1493 |
|
| 1494 |
addr &= TARGET_PAGE_MASK; |
| 1495 |
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 1496 |
tlb_set_dirty1(&env->tlb_write[0][i], addr);
|
| 1497 |
tlb_set_dirty1(&env->tlb_write[1][i], addr);
|
| 1498 |
} |
| 1499 |
|
| 1500 |
/* add a new TLB entry. At most one entry for a given virtual address
|
| 1501 |
is permitted. Return 0 if OK or 2 if the page could not be mapped
|
| 1502 |
(can only happen in non SOFTMMU mode for I/O pages or pages
|
| 1503 |
conflicting with the host address space). */
|
| 1504 |
int tlb_set_page(CPUState *env, target_ulong vaddr,
|
| 1505 |
target_phys_addr_t paddr, int prot,
|
| 1506 |
int is_user, int is_softmmu) |
| 1507 |
{
|
| 1508 |
PhysPageDesc *p; |
| 1509 |
unsigned long pd; |
| 1510 |
TranslationBlock *first_tb; |
| 1511 |
unsigned int index; |
| 1512 |
target_ulong address; |
| 1513 |
unsigned long addend; |
| 1514 |
int ret;
|
| 1515 |
|
| 1516 |
p = phys_page_find(paddr >> TARGET_PAGE_BITS); |
| 1517 |
first_tb = NULL;
|
| 1518 |
if (!p) {
|
| 1519 |
pd = IO_MEM_UNASSIGNED; |
| 1520 |
} else {
|
| 1521 |
PageDesc *p1; |
| 1522 |
pd = p->phys_offset; |
| 1523 |
if ((pd & ~TARGET_PAGE_MASK) <= IO_MEM_ROM) {
|
| 1524 |
/* NOTE: we also allocate the page at this stage */
|
| 1525 |
p1 = page_find_alloc(pd >> TARGET_PAGE_BITS); |
| 1526 |
first_tb = p1->first_tb; |
| 1527 |
} |
| 1528 |
} |
| 1529 |
#if defined(DEBUG_TLB)
|
| 1530 |
printf("tlb_set_page: vaddr=0x%08x paddr=0x%08x prot=%x u=%d c=%d smmu=%d pd=0x%08x\n",
|
| 1531 |
vaddr, paddr, prot, is_user, (first_tb != NULL), is_softmmu, pd);
|
| 1532 |
#endif
|
| 1533 |
|
| 1534 |
ret = 0;
|
| 1535 |
#if !defined(CONFIG_SOFTMMU)
|
| 1536 |
if (is_softmmu)
|
| 1537 |
#endif
|
| 1538 |
{
|
| 1539 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
|
| 1540 |
/* IO memory case */
|
| 1541 |
address = vaddr | pd; |
| 1542 |
addend = paddr; |
| 1543 |
} else {
|
| 1544 |
/* standard memory */
|
| 1545 |
address = vaddr; |
| 1546 |
addend = (unsigned long)phys_ram_base + (pd & TARGET_PAGE_MASK); |
| 1547 |
} |
| 1548 |
|
| 1549 |
index = (vaddr >> 12) & (CPU_TLB_SIZE - 1); |
| 1550 |
addend -= vaddr; |
| 1551 |
if (prot & PAGE_READ) {
|
| 1552 |
env->tlb_read[is_user][index].address = address; |
| 1553 |
env->tlb_read[is_user][index].addend = addend; |
| 1554 |
} else {
|
| 1555 |
env->tlb_read[is_user][index].address = -1;
|
| 1556 |
env->tlb_read[is_user][index].addend = -1;
|
| 1557 |
} |
| 1558 |
if (prot & PAGE_WRITE) {
|
| 1559 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM) {
|
| 1560 |
/* ROM: access is ignored (same as unassigned) */
|
| 1561 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_ROM; |
| 1562 |
env->tlb_write[is_user][index].addend = addend; |
| 1563 |
} else
|
| 1564 |
/* XXX: the PowerPC code seems not ready to handle
|
| 1565 |
self modifying code with DCBI */
|
| 1566 |
#if defined(TARGET_HAS_SMC) || 1 |
| 1567 |
if (first_tb) {
|
| 1568 |
/* if code is present, we use a specific memory
|
| 1569 |
handler. It works only for physical memory access */
|
| 1570 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_CODE; |
| 1571 |
env->tlb_write[is_user][index].addend = addend; |
| 1572 |
} else
|
| 1573 |
#endif
|
| 1574 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM &&
|
| 1575 |
!cpu_physical_memory_is_dirty(pd)) {
|
| 1576 |
env->tlb_write[is_user][index].address = vaddr | IO_MEM_NOTDIRTY; |
| 1577 |
env->tlb_write[is_user][index].addend = addend; |
| 1578 |
} else {
|
| 1579 |
env->tlb_write[is_user][index].address = address; |
| 1580 |
env->tlb_write[is_user][index].addend = addend; |
| 1581 |
} |
| 1582 |
} else {
|
| 1583 |
env->tlb_write[is_user][index].address = -1;
|
| 1584 |
env->tlb_write[is_user][index].addend = -1;
|
| 1585 |
} |
| 1586 |
} |
| 1587 |
#if !defined(CONFIG_SOFTMMU)
|
| 1588 |
else {
|
| 1589 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
|
| 1590 |
/* IO access: no mapping is done as it will be handled by the
|
| 1591 |
soft MMU */
|
| 1592 |
if (!(env->hflags & HF_SOFTMMU_MASK))
|
| 1593 |
ret = 2;
|
| 1594 |
} else {
|
| 1595 |
void *map_addr;
|
| 1596 |
|
| 1597 |
if (vaddr >= MMAP_AREA_END) {
|
| 1598 |
ret = 2;
|
| 1599 |
} else {
|
| 1600 |
if (prot & PROT_WRITE) {
|
| 1601 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM ||
|
| 1602 |
#if defined(TARGET_HAS_SMC) || 1 |
| 1603 |
first_tb || |
| 1604 |
#endif
|
| 1605 |
((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM && |
| 1606 |
!cpu_physical_memory_is_dirty(pd))) {
|
| 1607 |
/* ROM: we do as if code was inside */
|
| 1608 |
/* if code is present, we only map as read only and save the
|
| 1609 |
original mapping */
|
| 1610 |
VirtPageDesc *vp; |
| 1611 |
|
| 1612 |
vp = virt_page_find_alloc(vaddr >> TARGET_PAGE_BITS); |
| 1613 |
vp->phys_addr = pd; |
| 1614 |
vp->prot = prot; |
| 1615 |
vp->valid_tag = virt_valid_tag; |
| 1616 |
prot &= ~PAGE_WRITE; |
| 1617 |
} |
| 1618 |
} |
| 1619 |
map_addr = mmap((void *)vaddr, TARGET_PAGE_SIZE, prot,
|
| 1620 |
MAP_SHARED | MAP_FIXED, phys_ram_fd, (pd & TARGET_PAGE_MASK)); |
| 1621 |
if (map_addr == MAP_FAILED) {
|
| 1622 |
cpu_abort(env, "mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
|
| 1623 |
paddr, vaddr); |
| 1624 |
} |
| 1625 |
} |
| 1626 |
} |
| 1627 |
} |
| 1628 |
#endif
|
| 1629 |
return ret;
|
| 1630 |
} |
| 1631 |
|
| 1632 |
/* called from signal handler: invalidate the code and unprotect the
|
| 1633 |
page. Return TRUE if the fault was succesfully handled. */
|
| 1634 |
int page_unprotect(unsigned long addr, unsigned long pc, void *puc) |
| 1635 |
{
|
| 1636 |
#if !defined(CONFIG_SOFTMMU)
|
| 1637 |
VirtPageDesc *vp; |
| 1638 |
|
| 1639 |
#if defined(DEBUG_TLB)
|
| 1640 |
printf("page_unprotect: addr=0x%08x\n", addr);
|
| 1641 |
#endif
|
| 1642 |
addr &= TARGET_PAGE_MASK; |
| 1643 |
|
| 1644 |
/* if it is not mapped, no need to worry here */
|
| 1645 |
if (addr >= MMAP_AREA_END)
|
| 1646 |
return 0; |
| 1647 |
vp = virt_page_find(addr >> TARGET_PAGE_BITS); |
| 1648 |
if (!vp)
|
| 1649 |
return 0; |
| 1650 |
/* NOTE: in this case, validate_tag is _not_ tested as it
|
| 1651 |
validates only the code TLB */
|
| 1652 |
if (vp->valid_tag != virt_valid_tag)
|
| 1653 |
return 0; |
| 1654 |
if (!(vp->prot & PAGE_WRITE))
|
| 1655 |
return 0; |
| 1656 |
#if defined(DEBUG_TLB)
|
| 1657 |
printf("page_unprotect: addr=0x%08x phys_addr=0x%08x prot=%x\n",
|
| 1658 |
addr, vp->phys_addr, vp->prot); |
| 1659 |
#endif
|
| 1660 |
if (mprotect((void *)addr, TARGET_PAGE_SIZE, vp->prot) < 0) |
| 1661 |
cpu_abort(cpu_single_env, "error mprotect addr=0x%lx prot=%d\n",
|
| 1662 |
(unsigned long)addr, vp->prot); |
| 1663 |
/* set the dirty bit */
|
| 1664 |
phys_ram_dirty[vp->phys_addr >> TARGET_PAGE_BITS] = 1;
|
| 1665 |
/* flush the code inside */
|
| 1666 |
tb_invalidate_phys_page(vp->phys_addr, pc, puc); |
| 1667 |
return 1; |
| 1668 |
#else
|
| 1669 |
return 0; |
| 1670 |
#endif
|
| 1671 |
} |
| 1672 |
|
| 1673 |
#else
|
| 1674 |
|
| 1675 |
void tlb_flush(CPUState *env, int flush_global) |
| 1676 |
{
|
| 1677 |
} |
| 1678 |
|
| 1679 |
void tlb_flush_page(CPUState *env, target_ulong addr)
|
| 1680 |
{
|
| 1681 |
} |
| 1682 |
|
| 1683 |
int tlb_set_page(CPUState *env, target_ulong vaddr,
|
| 1684 |
target_phys_addr_t paddr, int prot,
|
| 1685 |
int is_user, int is_softmmu) |
| 1686 |
{
|
| 1687 |
return 0; |
| 1688 |
} |
| 1689 |
|
| 1690 |
/* dump memory mappings */
|
| 1691 |
void page_dump(FILE *f)
|
| 1692 |
{
|
| 1693 |
unsigned long start, end; |
| 1694 |
int i, j, prot, prot1;
|
| 1695 |
PageDesc *p; |
| 1696 |
|
| 1697 |
fprintf(f, "%-8s %-8s %-8s %s\n",
|
| 1698 |
"start", "end", "size", "prot"); |
| 1699 |
start = -1;
|
| 1700 |
end = -1;
|
| 1701 |
prot = 0;
|
| 1702 |
for(i = 0; i <= L1_SIZE; i++) { |
| 1703 |
if (i < L1_SIZE)
|
| 1704 |
p = l1_map[i]; |
| 1705 |
else
|
| 1706 |
p = NULL;
|
| 1707 |
for(j = 0;j < L2_SIZE; j++) { |
| 1708 |
if (!p)
|
| 1709 |
prot1 = 0;
|
| 1710 |
else
|
| 1711 |
prot1 = p[j].flags; |
| 1712 |
if (prot1 != prot) {
|
| 1713 |
end = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS);
|
| 1714 |
if (start != -1) { |
| 1715 |
fprintf(f, "%08lx-%08lx %08lx %c%c%c\n",
|
| 1716 |
start, end, end - start, |
| 1717 |
prot & PAGE_READ ? 'r' : '-', |
| 1718 |
prot & PAGE_WRITE ? 'w' : '-', |
| 1719 |
prot & PAGE_EXEC ? 'x' : '-'); |
| 1720 |
} |
| 1721 |
if (prot1 != 0) |
| 1722 |
start = end; |
| 1723 |
else
|
| 1724 |
start = -1;
|
| 1725 |
prot = prot1; |
| 1726 |
} |
| 1727 |
if (!p)
|
| 1728 |
break;
|
| 1729 |
} |
| 1730 |
} |
| 1731 |
} |
| 1732 |
|
| 1733 |
int page_get_flags(unsigned long address) |
| 1734 |
{
|
| 1735 |
PageDesc *p; |
| 1736 |
|
| 1737 |
p = page_find(address >> TARGET_PAGE_BITS); |
| 1738 |
if (!p)
|
| 1739 |
return 0; |
| 1740 |
return p->flags;
|
| 1741 |
} |
| 1742 |
|
| 1743 |
/* modify the flags of a page and invalidate the code if
|
| 1744 |
necessary. The flag PAGE_WRITE_ORG is positionned automatically
|
| 1745 |
depending on PAGE_WRITE */
|
| 1746 |
void page_set_flags(unsigned long start, unsigned long end, int flags) |
| 1747 |
{
|
| 1748 |
PageDesc *p; |
| 1749 |
unsigned long addr; |
| 1750 |
|
| 1751 |
start = start & TARGET_PAGE_MASK; |
| 1752 |
end = TARGET_PAGE_ALIGN(end); |
| 1753 |
if (flags & PAGE_WRITE)
|
| 1754 |
flags |= PAGE_WRITE_ORG; |
| 1755 |
spin_lock(&tb_lock); |
| 1756 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
| 1757 |
p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
| 1758 |
/* if the write protection is set, then we invalidate the code
|
| 1759 |
inside */
|
| 1760 |
if (!(p->flags & PAGE_WRITE) &&
|
| 1761 |
(flags & PAGE_WRITE) && |
| 1762 |
p->first_tb) {
|
| 1763 |
tb_invalidate_phys_page(addr, 0, NULL); |
| 1764 |
} |
| 1765 |
p->flags = flags; |
| 1766 |
} |
| 1767 |
spin_unlock(&tb_lock); |
| 1768 |
} |
| 1769 |
|
| 1770 |
/* called from signal handler: invalidate the code and unprotect the
|
| 1771 |
page. Return TRUE if the fault was succesfully handled. */
|
| 1772 |
int page_unprotect(unsigned long address, unsigned long pc, void *puc) |
| 1773 |
{
|
| 1774 |
unsigned int page_index, prot, pindex; |
| 1775 |
PageDesc *p, *p1; |
| 1776 |
unsigned long host_start, host_end, addr; |
| 1777 |
|
| 1778 |
host_start = address & qemu_host_page_mask; |
| 1779 |
page_index = host_start >> TARGET_PAGE_BITS; |
| 1780 |
p1 = page_find(page_index); |
| 1781 |
if (!p1)
|
| 1782 |
return 0; |
| 1783 |
host_end = host_start + qemu_host_page_size; |
| 1784 |
p = p1; |
| 1785 |
prot = 0;
|
| 1786 |
for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) {
|
| 1787 |
prot |= p->flags; |
| 1788 |
p++; |
| 1789 |
} |
| 1790 |
/* if the page was really writable, then we change its
|
| 1791 |
protection back to writable */
|
| 1792 |
if (prot & PAGE_WRITE_ORG) {
|
| 1793 |
pindex = (address - host_start) >> TARGET_PAGE_BITS; |
| 1794 |
if (!(p1[pindex].flags & PAGE_WRITE)) {
|
| 1795 |
mprotect((void *)host_start, qemu_host_page_size,
|
| 1796 |
(prot & PAGE_BITS) | PAGE_WRITE); |
| 1797 |
p1[pindex].flags |= PAGE_WRITE; |
| 1798 |
/* and since the content will be modified, we must invalidate
|
| 1799 |
the corresponding translated code. */
|
| 1800 |
tb_invalidate_phys_page(address, pc, puc); |
| 1801 |
#ifdef DEBUG_TB_CHECK
|
| 1802 |
tb_invalidate_check(address); |
| 1803 |
#endif
|
| 1804 |
return 1; |
| 1805 |
} |
| 1806 |
} |
| 1807 |
return 0; |
| 1808 |
} |
| 1809 |
|
| 1810 |
/* call this function when system calls directly modify a memory area */
|
| 1811 |
void page_unprotect_range(uint8_t *data, unsigned long data_size) |
| 1812 |
{
|
| 1813 |
unsigned long start, end, addr; |
| 1814 |
|
| 1815 |
start = (unsigned long)data; |
| 1816 |
end = start + data_size; |
| 1817 |
start &= TARGET_PAGE_MASK; |
| 1818 |
end = TARGET_PAGE_ALIGN(end); |
| 1819 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
| 1820 |
page_unprotect(addr, 0, NULL); |
| 1821 |
} |
| 1822 |
} |
| 1823 |
|
| 1824 |
static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr) |
| 1825 |
{
|
| 1826 |
} |
| 1827 |
#endif /* defined(CONFIG_USER_ONLY) */ |
| 1828 |
|
| 1829 |
/* register physical memory. 'size' must be a multiple of the target
|
| 1830 |
page size. If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
|
| 1831 |
io memory page */
|
| 1832 |
void cpu_register_physical_memory(target_phys_addr_t start_addr,
|
| 1833 |
unsigned long size, |
| 1834 |
unsigned long phys_offset) |
| 1835 |
{
|
| 1836 |
unsigned long addr, end_addr; |
| 1837 |
PhysPageDesc *p; |
| 1838 |
|
| 1839 |
size = (size + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK;
|
| 1840 |
end_addr = start_addr + size; |
| 1841 |
for(addr = start_addr; addr != end_addr; addr += TARGET_PAGE_SIZE) {
|
| 1842 |
p = phys_page_find_alloc(addr >> TARGET_PAGE_BITS); |
| 1843 |
p->phys_offset = phys_offset; |
| 1844 |
if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM)
|
| 1845 |
phys_offset += TARGET_PAGE_SIZE; |
| 1846 |
} |
| 1847 |
} |
| 1848 |
|
| 1849 |
static uint32_t unassigned_mem_readb(void *opaque, target_phys_addr_t addr) |
| 1850 |
{
|
| 1851 |
return 0; |
| 1852 |
} |
| 1853 |
|
| 1854 |
static void unassigned_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val) |
| 1855 |
{
|
| 1856 |
} |
| 1857 |
|
| 1858 |
static CPUReadMemoryFunc *unassigned_mem_read[3] = { |
| 1859 |
unassigned_mem_readb, |
| 1860 |
unassigned_mem_readb, |
| 1861 |
unassigned_mem_readb, |
| 1862 |
}; |
| 1863 |
|
| 1864 |
static CPUWriteMemoryFunc *unassigned_mem_write[3] = { |
| 1865 |
unassigned_mem_writeb, |
| 1866 |
unassigned_mem_writeb, |
| 1867 |
unassigned_mem_writeb, |
| 1868 |
}; |
| 1869 |
|
| 1870 |
/* self modifying code support in soft mmu mode : writing to a page
|
| 1871 |
containing code comes to these functions */
|
| 1872 |
|
| 1873 |
static void code_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val) |
| 1874 |
{
|
| 1875 |
unsigned long phys_addr; |
| 1876 |
|
| 1877 |
phys_addr = addr - (unsigned long)phys_ram_base; |
| 1878 |
#if !defined(CONFIG_USER_ONLY)
|
| 1879 |
tb_invalidate_phys_page_fast(phys_addr, 1);
|
| 1880 |
#endif
|
| 1881 |
stb_p((uint8_t *)(long)addr, val);
|
| 1882 |
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
| 1883 |
} |
| 1884 |
|
| 1885 |
static void code_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val) |
| 1886 |
{
|
| 1887 |
unsigned long phys_addr; |
| 1888 |
|
| 1889 |
phys_addr = addr - (unsigned long)phys_ram_base; |
| 1890 |
#if !defined(CONFIG_USER_ONLY)
|
| 1891 |
tb_invalidate_phys_page_fast(phys_addr, 2);
|
| 1892 |
#endif
|
| 1893 |
stw_p((uint8_t *)(long)addr, val);
|
| 1894 |
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
| 1895 |
} |
| 1896 |
|
| 1897 |
static void code_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) |
| 1898 |
{
|
| 1899 |
unsigned long phys_addr; |
| 1900 |
|
| 1901 |
phys_addr = addr - (unsigned long)phys_ram_base; |
| 1902 |
#if !defined(CONFIG_USER_ONLY)
|
| 1903 |
tb_invalidate_phys_page_fast(phys_addr, 4);
|
| 1904 |
#endif
|
| 1905 |
stl_p((uint8_t *)(long)addr, val);
|
| 1906 |
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1;
|
| 1907 |
} |
| 1908 |
|
| 1909 |
static CPUReadMemoryFunc *code_mem_read[3] = { |
| 1910 |
NULL, /* never used */ |
| 1911 |
NULL, /* never used */ |
| 1912 |
NULL, /* never used */ |
| 1913 |
}; |
| 1914 |
|
| 1915 |
static CPUWriteMemoryFunc *code_mem_write[3] = { |
| 1916 |
code_mem_writeb, |
| 1917 |
code_mem_writew, |
| 1918 |
code_mem_writel, |
| 1919 |
}; |
| 1920 |
|
| 1921 |
static void notdirty_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val) |
| 1922 |
{
|
| 1923 |
stb_p((uint8_t *)(long)addr, val);
|
| 1924 |
tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr); |
| 1925 |
} |
| 1926 |
|
| 1927 |
static void notdirty_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val) |
| 1928 |
{
|
| 1929 |
stw_p((uint8_t *)(long)addr, val);
|
| 1930 |
tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr); |
| 1931 |
} |
| 1932 |
|
| 1933 |
static void notdirty_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) |
| 1934 |
{
|
| 1935 |
stl_p((uint8_t *)(long)addr, val);
|
| 1936 |
tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr); |
| 1937 |
} |
| 1938 |
|
| 1939 |
static CPUWriteMemoryFunc *notdirty_mem_write[3] = { |
| 1940 |
notdirty_mem_writeb, |
| 1941 |
notdirty_mem_writew, |
| 1942 |
notdirty_mem_writel, |
| 1943 |
}; |
| 1944 |
|
| 1945 |
static void io_mem_init(void) |
| 1946 |
{
|
| 1947 |
cpu_register_io_memory(IO_MEM_ROM >> IO_MEM_SHIFT, code_mem_read, unassigned_mem_write, NULL);
|
| 1948 |
cpu_register_io_memory(IO_MEM_UNASSIGNED >> IO_MEM_SHIFT, unassigned_mem_read, unassigned_mem_write, NULL);
|
| 1949 |
cpu_register_io_memory(IO_MEM_CODE >> IO_MEM_SHIFT, code_mem_read, code_mem_write, NULL);
|
| 1950 |
cpu_register_io_memory(IO_MEM_NOTDIRTY >> IO_MEM_SHIFT, code_mem_read, notdirty_mem_write, NULL);
|
| 1951 |
io_mem_nb = 5;
|
| 1952 |
|
| 1953 |
/* alloc dirty bits array */
|
| 1954 |
phys_ram_dirty = qemu_malloc(phys_ram_size >> TARGET_PAGE_BITS); |
| 1955 |
} |
| 1956 |
|
| 1957 |
/* mem_read and mem_write are arrays of functions containing the
|
| 1958 |
function to access byte (index 0), word (index 1) and dword (index
|
| 1959 |
2). All functions must be supplied. If io_index is non zero, the
|
| 1960 |
corresponding io zone is modified. If it is zero, a new io zone is
|
| 1961 |
allocated. The return value can be used with
|
| 1962 |
cpu_register_physical_memory(). (-1) is returned if error. */
|
| 1963 |
int cpu_register_io_memory(int io_index, |
| 1964 |
CPUReadMemoryFunc **mem_read, |
| 1965 |
CPUWriteMemoryFunc **mem_write, |
| 1966 |
void *opaque)
|
| 1967 |
{
|
| 1968 |
int i;
|
| 1969 |
|
| 1970 |
if (io_index <= 0) { |
| 1971 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
| 1972 |
return -1; |
| 1973 |
io_index = io_mem_nb++; |
| 1974 |
} else {
|
| 1975 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
| 1976 |
return -1; |
| 1977 |
} |
| 1978 |
|
| 1979 |
for(i = 0;i < 3; i++) { |
| 1980 |
io_mem_read[io_index][i] = mem_read[i]; |
| 1981 |
io_mem_write[io_index][i] = mem_write[i]; |
| 1982 |
} |
| 1983 |
io_mem_opaque[io_index] = opaque; |
| 1984 |
return io_index << IO_MEM_SHIFT;
|
| 1985 |
} |
| 1986 |
|
| 1987 |
CPUWriteMemoryFunc **cpu_get_io_memory_write(int io_index)
|
| 1988 |
{
|
| 1989 |
return io_mem_write[io_index >> IO_MEM_SHIFT];
|
| 1990 |
} |
| 1991 |
|
| 1992 |
CPUReadMemoryFunc **cpu_get_io_memory_read(int io_index)
|
| 1993 |
{
|
| 1994 |
return io_mem_read[io_index >> IO_MEM_SHIFT];
|
| 1995 |
} |
| 1996 |
|
| 1997 |
/* physical memory access (slow version, mainly for debug) */
|
| 1998 |
#if defined(CONFIG_USER_ONLY)
|
| 1999 |
void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
|
| 2000 |
int len, int is_write) |
| 2001 |
{
|
| 2002 |
int l, flags;
|
| 2003 |
target_ulong page; |
| 2004 |
|
| 2005 |
while (len > 0) { |
| 2006 |
page = addr & TARGET_PAGE_MASK; |
| 2007 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 2008 |
if (l > len)
|
| 2009 |
l = len; |
| 2010 |
flags = page_get_flags(page); |
| 2011 |
if (!(flags & PAGE_VALID))
|
| 2012 |
return;
|
| 2013 |
if (is_write) {
|
| 2014 |
if (!(flags & PAGE_WRITE))
|
| 2015 |
return;
|
| 2016 |
memcpy((uint8_t *)addr, buf, len); |
| 2017 |
} else {
|
| 2018 |
if (!(flags & PAGE_READ))
|
| 2019 |
return;
|
| 2020 |
memcpy(buf, (uint8_t *)addr, len); |
| 2021 |
} |
| 2022 |
len -= l; |
| 2023 |
buf += l; |
| 2024 |
addr += l; |
| 2025 |
} |
| 2026 |
} |
| 2027 |
#else
|
| 2028 |
void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
|
| 2029 |
int len, int is_write) |
| 2030 |
{
|
| 2031 |
int l, io_index;
|
| 2032 |
uint8_t *ptr; |
| 2033 |
uint32_t val; |
| 2034 |
target_phys_addr_t page; |
| 2035 |
unsigned long pd; |
| 2036 |
PhysPageDesc *p; |
| 2037 |
|
| 2038 |
while (len > 0) { |
| 2039 |
page = addr & TARGET_PAGE_MASK; |
| 2040 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 2041 |
if (l > len)
|
| 2042 |
l = len; |
| 2043 |
p = phys_page_find(page >> TARGET_PAGE_BITS); |
| 2044 |
if (!p) {
|
| 2045 |
pd = IO_MEM_UNASSIGNED; |
| 2046 |
} else {
|
| 2047 |
pd = p->phys_offset; |
| 2048 |
} |
| 2049 |
|
| 2050 |
if (is_write) {
|
| 2051 |
if ((pd & ~TARGET_PAGE_MASK) != 0) { |
| 2052 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 2053 |
if (l >= 4 && ((addr & 3) == 0)) { |
| 2054 |
/* 32 bit read access */
|
| 2055 |
val = ldl_p(buf); |
| 2056 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
|
| 2057 |
l = 4;
|
| 2058 |
} else if (l >= 2 && ((addr & 1) == 0)) { |
| 2059 |
/* 16 bit read access */
|
| 2060 |
val = lduw_p(buf); |
| 2061 |
io_mem_write[io_index][1](io_mem_opaque[io_index], addr, val);
|
| 2062 |
l = 2;
|
| 2063 |
} else {
|
| 2064 |
/* 8 bit access */
|
| 2065 |
val = ldub_p(buf); |
| 2066 |
io_mem_write[io_index][0](io_mem_opaque[io_index], addr, val);
|
| 2067 |
l = 1;
|
| 2068 |
} |
| 2069 |
} else {
|
| 2070 |
unsigned long addr1; |
| 2071 |
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
| 2072 |
/* RAM case */
|
| 2073 |
ptr = phys_ram_base + addr1; |
| 2074 |
memcpy(ptr, buf, l); |
| 2075 |
/* invalidate code */
|
| 2076 |
tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
|
| 2077 |
/* set dirty bit */
|
| 2078 |
phys_ram_dirty[page >> TARGET_PAGE_BITS] = 1;
|
| 2079 |
} |
| 2080 |
} else {
|
| 2081 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
| 2082 |
(pd & ~TARGET_PAGE_MASK) != IO_MEM_CODE) {
|
| 2083 |
/* I/O case */
|
| 2084 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 2085 |
if (l >= 4 && ((addr & 3) == 0)) { |
| 2086 |
/* 32 bit read access */
|
| 2087 |
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
|
| 2088 |
stl_p(buf, val); |
| 2089 |
l = 4;
|
| 2090 |
} else if (l >= 2 && ((addr & 1) == 0)) { |
| 2091 |
/* 16 bit read access */
|
| 2092 |
val = io_mem_read[io_index][1](io_mem_opaque[io_index], addr);
|
| 2093 |
stw_p(buf, val); |
| 2094 |
l = 2;
|
| 2095 |
} else {
|
| 2096 |
/* 8 bit access */
|
| 2097 |
val = io_mem_read[io_index][0](io_mem_opaque[io_index], addr);
|
| 2098 |
stb_p(buf, val); |
| 2099 |
l = 1;
|
| 2100 |
} |
| 2101 |
} else {
|
| 2102 |
/* RAM case */
|
| 2103 |
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) + |
| 2104 |
(addr & ~TARGET_PAGE_MASK); |
| 2105 |
memcpy(buf, ptr, l); |
| 2106 |
} |
| 2107 |
} |
| 2108 |
len -= l; |
| 2109 |
buf += l; |
| 2110 |
addr += l; |
| 2111 |
} |
| 2112 |
} |
| 2113 |
#endif
|
| 2114 |
|
| 2115 |
/* virtual memory access for debug */
|
| 2116 |
int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
|
| 2117 |
uint8_t *buf, int len, int is_write) |
| 2118 |
{
|
| 2119 |
int l;
|
| 2120 |
target_ulong page, phys_addr; |
| 2121 |
|
| 2122 |
while (len > 0) { |
| 2123 |
page = addr & TARGET_PAGE_MASK; |
| 2124 |
phys_addr = cpu_get_phys_page_debug(env, page); |
| 2125 |
/* if no physical page mapped, return an error */
|
| 2126 |
if (phys_addr == -1) |
| 2127 |
return -1; |
| 2128 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 2129 |
if (l > len)
|
| 2130 |
l = len; |
| 2131 |
cpu_physical_memory_rw(phys_addr + (addr & ~TARGET_PAGE_MASK), |
| 2132 |
buf, l, is_write); |
| 2133 |
len -= l; |
| 2134 |
buf += l; |
| 2135 |
addr += l; |
| 2136 |
} |
| 2137 |
return 0; |
| 2138 |
} |
| 2139 |
|
| 2140 |
#if !defined(CONFIG_USER_ONLY)
|
| 2141 |
|
| 2142 |
#define MMUSUFFIX _cmmu
|
| 2143 |
#define GETPC() NULL |
| 2144 |
#define env cpu_single_env
|
| 2145 |
#define SOFTMMU_CODE_ACCESS
|
| 2146 |
|
| 2147 |
#define SHIFT 0 |
| 2148 |
#include "softmmu_template.h" |
| 2149 |
|
| 2150 |
#define SHIFT 1 |
| 2151 |
#include "softmmu_template.h" |
| 2152 |
|
| 2153 |
#define SHIFT 2 |
| 2154 |
#include "softmmu_template.h" |
| 2155 |
|
| 2156 |
#define SHIFT 3 |
| 2157 |
#include "softmmu_template.h" |
| 2158 |
|
| 2159 |
#undef env
|
| 2160 |
|
| 2161 |
#endif
|