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vnc: Fix crash on 'info vnc' after 'change vnc none'
[qemu/qemu-JZ.git] / exec.c
blob44f6a425565f05780b9b78c16e8d7cc5c503416c
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 #define WIN32_LEAN_AND_MEAN
23 #include <windows.h>
24 #else
25 #include <sys/types.h>
26 #include <sys/mman.h>
27 #endif
28 #include <stdlib.h>
29 #include <stdio.h>
30 #include <stdarg.h>
31 #include <string.h>
32 #include <errno.h>
33 #include <unistd.h>
34 #include <inttypes.h>
35
36 #include "cpu.h"
37 #include "exec-all.h"
38 #include "qemu-common.h"
39 #include "tcg.h"
40 #include "hw/hw.h"
41 #include "osdep.h"
42 #include "kvm.h"
43 #if defined(CONFIG_USER_ONLY)
44 #include <qemu.h>
45 #endif
46
47 //#define DEBUG_TB_INVALIDATE
48 //#define DEBUG_FLUSH
49 //#define DEBUG_TLB
50 //#define DEBUG_UNASSIGNED
51
52 /* make various TB consistency checks */
53 //#define DEBUG_TB_CHECK
54 //#define DEBUG_TLB_CHECK
55
56 //#define DEBUG_IOPORT
57 //#define DEBUG_SUBPAGE
58
59 #if !defined(CONFIG_USER_ONLY)
60 /* TB consistency checks only implemented for usermode emulation. */
61 #undef DEBUG_TB_CHECK
62 #endif
63
64 #define SMC_BITMAP_USE_THRESHOLD 10
65
66 #define MMAP_AREA_START 0x00000000
67 #define MMAP_AREA_END 0xa8000000
68
69 #if defined(TARGET_SPARC64)
70 #define TARGET_PHYS_ADDR_SPACE_BITS 41
71 #elif defined(TARGET_SPARC)
72 #define TARGET_PHYS_ADDR_SPACE_BITS 36
73 #elif defined(TARGET_ALPHA)
74 #define TARGET_PHYS_ADDR_SPACE_BITS 42
75 #define TARGET_VIRT_ADDR_SPACE_BITS 42
76 #elif defined(TARGET_PPC64)
77 #define TARGET_PHYS_ADDR_SPACE_BITS 42
78 #elif defined(TARGET_X86_64) && !defined(USE_KQEMU)
79 #define TARGET_PHYS_ADDR_SPACE_BITS 42
80 #elif defined(TARGET_I386) && !defined(USE_KQEMU)
81 #define TARGET_PHYS_ADDR_SPACE_BITS 36
82 #else
83 /* Note: for compatibility with kqemu, we use 32 bits for x86_64 */
84 #define TARGET_PHYS_ADDR_SPACE_BITS 32
85 #endif
86
87 static TranslationBlock *tbs;
88 int code_gen_max_blocks;
89 TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
90 static int nb_tbs;
91 /* any access to the tbs or the page table must use this lock */
92 spinlock_t tb_lock = SPIN_LOCK_UNLOCKED;
93
94 #if defined(__arm__) || defined(__sparc_v9__)
95 /* The prologue must be reachable with a direct jump. ARM and Sparc64
96 have limited branch ranges (possibly also PPC) so place it in a
97 section close to code segment. */
98 #define code_gen_section \
99 __attribute__((__section__(".gen_code"))) \
100 __attribute__((aligned (32)))
101 #else
102 #define code_gen_section \
103 __attribute__((aligned (32)))
104 #endif
105
106 uint8_t code_gen_prologue[1024] code_gen_section;
107 static uint8_t *code_gen_buffer;
108 static unsigned long code_gen_buffer_size;
109 /* threshold to flush the translated code buffer */
110 static unsigned long code_gen_buffer_max_size;
111 uint8_t *code_gen_ptr;
112
113 #if !defined(CONFIG_USER_ONLY)
114 ram_addr_t phys_ram_size;
115 int phys_ram_fd;
116 uint8_t *phys_ram_base;
117 uint8_t *phys_ram_dirty;
118 static int in_migration;
119 static ram_addr_t phys_ram_alloc_offset = 0;
120 #endif
121
122 CPUState *first_cpu;
123 /* current CPU in the current thread. It is only valid inside
124 cpu_exec() */
125 CPUState *cpu_single_env;
126 /* 0 = Do not count executed instructions.
127 1 = Precise instruction counting.
128 2 = Adaptive rate instruction counting. */
129 int use_icount = 0;
130 /* Current instruction counter. While executing translated code this may
131 include some instructions that have not yet been executed. */
132 int64_t qemu_icount;
133
134 typedef struct PageDesc {
135 /* list of TBs intersecting this ram page */
136 TranslationBlock *first_tb;
137 /* in order to optimize self modifying code, we count the number
138 of lookups we do to a given page to use a bitmap */
139 unsigned int code_write_count;
140 uint8_t *code_bitmap;
141 #if defined(CONFIG_USER_ONLY)
142 unsigned long flags;
143 #endif
144 } PageDesc;
145
146 typedef struct PhysPageDesc {
147 /* offset in host memory of the page + io_index in the low bits */
148 ram_addr_t phys_offset;
149 ram_addr_t region_offset;
150 } PhysPageDesc;
151
152 #define L2_BITS 10
153 #if defined(CONFIG_USER_ONLY) && defined(TARGET_VIRT_ADDR_SPACE_BITS)
154 /* XXX: this is a temporary hack for alpha target.
155 * In the future, this is to be replaced by a multi-level table
156 * to actually be able to handle the complete 64 bits address space.
157 */
158 #define L1_BITS (TARGET_VIRT_ADDR_SPACE_BITS - L2_BITS - TARGET_PAGE_BITS)
159 #else
160 #define L1_BITS (32 - L2_BITS - TARGET_PAGE_BITS)
161 #endif
162
163 #define L1_SIZE (1 << L1_BITS)
164 #define L2_SIZE (1 << L2_BITS)
165
166 unsigned long qemu_real_host_page_size;
167 unsigned long qemu_host_page_bits;
168 unsigned long qemu_host_page_size;
169 unsigned long qemu_host_page_mask;
170
171 /* XXX: for system emulation, it could just be an array */
172 static PageDesc *l1_map[L1_SIZE];
173 static PhysPageDesc **l1_phys_map;
174
175 #if !defined(CONFIG_USER_ONLY)
176 static void io_mem_init(void);
177
178 /* io memory support */
179 CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
180 CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
181 void *io_mem_opaque[IO_MEM_NB_ENTRIES];
182 static int io_mem_nb;
183 static int io_mem_watch;
184 #endif
185
186 /* log support */
187 static const char *logfilename = "/tmp/qemu.log";
188 FILE *logfile;
189 int loglevel;
190 static int log_append = 0;
191
192 /* statistics */
193 static int tlb_flush_count;
194 static int tb_flush_count;
195 static int tb_phys_invalidate_count;
196
197 #define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK)
198 typedef struct subpage_t {
199 target_phys_addr_t base;
200 CPUReadMemoryFunc **mem_read[TARGET_PAGE_SIZE][4];
201 CPUWriteMemoryFunc **mem_write[TARGET_PAGE_SIZE][4];
202 void *opaque[TARGET_PAGE_SIZE][2][4];
203 ram_addr_t region_offset[TARGET_PAGE_SIZE][2][4];
204 } subpage_t;
205
206 #ifdef _WIN32
207 static void map_exec(void *addr, long size)
208 {
209 DWORD old_protect;
210 VirtualProtect(addr, size,
211 PAGE_EXECUTE_READWRITE, &old_protect);
212
213 }
214 #else
215 static void map_exec(void *addr, long size)
216 {
217 unsigned long start, end, page_size;
218
219 page_size = getpagesize();
220 start = (unsigned long)addr;
221 start &= ~(page_size - 1);
222
223 end = (unsigned long)addr + size;
224 end += page_size - 1;
225 end &= ~(page_size - 1);
226
227 mprotect((void *)start, end - start,
228 PROT_READ | PROT_WRITE | PROT_EXEC);
229 }
230 #endif
231
232 static void page_init(void)
233 {
234 /* NOTE: we can always suppose that qemu_host_page_size >=
235 TARGET_PAGE_SIZE */
236 #ifdef _WIN32
237 {
238 SYSTEM_INFO system_info;
239
240 GetSystemInfo(&system_info);
241 qemu_real_host_page_size = system_info.dwPageSize;
242 }
243 #else
244 qemu_real_host_page_size = getpagesize();
245 #endif
246 if (qemu_host_page_size == 0)
247 qemu_host_page_size = qemu_real_host_page_size;
248 if (qemu_host_page_size < TARGET_PAGE_SIZE)
249 qemu_host_page_size = TARGET_PAGE_SIZE;
250 qemu_host_page_bits = 0;
251 while ((1 << qemu_host_page_bits) < qemu_host_page_size)
252 qemu_host_page_bits++;
253 qemu_host_page_mask = ~(qemu_host_page_size - 1);
254 l1_phys_map = qemu_vmalloc(L1_SIZE * sizeof(void *));
255 memset(l1_phys_map, 0, L1_SIZE * sizeof(void *));
256
257 #if !defined(_WIN32) && defined(CONFIG_USER_ONLY)
258 {
259 long long startaddr, endaddr;
260 FILE *f;
261 int n;
262
263 mmap_lock();
264 last_brk = (unsigned long)sbrk(0);
265 f = fopen("/proc/self/maps", "r");
266 if (f) {
267 do {
268 n = fscanf (f, "%llx-%llx %*[^\n]\n", &startaddr, &endaddr);
269 if (n == 2) {
270 startaddr = MIN(startaddr,
271 (1ULL << TARGET_PHYS_ADDR_SPACE_BITS) - 1);
272 endaddr = MIN(endaddr,
273 (1ULL << TARGET_PHYS_ADDR_SPACE_BITS) - 1);
274 page_set_flags(startaddr & TARGET_PAGE_MASK,
275 TARGET_PAGE_ALIGN(endaddr),
276 PAGE_RESERVED);
277 }
278 } while (!feof(f));
279 fclose(f);
280 }
281 mmap_unlock();
282 }
283 #endif
284 }
285
286 static inline PageDesc **page_l1_map(target_ulong index)
287 {
288 #if TARGET_LONG_BITS > 32
289 /* Host memory outside guest VM. For 32-bit targets we have already
290 excluded high addresses. */
291 if (index > ((target_ulong)L2_SIZE * L1_SIZE))
292 return NULL;
293 #endif
294 return &l1_map[index >> L2_BITS];
295 }
296
297 static inline PageDesc *page_find_alloc(target_ulong index)
298 {
299 PageDesc **lp, *p;
300 lp = page_l1_map(index);
301 if (!lp)
302 return NULL;
303
304 p = *lp;
305 if (!p) {
306 /* allocate if not found */
307 #if defined(CONFIG_USER_ONLY)
308 size_t len = sizeof(PageDesc) * L2_SIZE;
309 /* Don't use qemu_malloc because it may recurse. */
310 p = mmap(0, len, PROT_READ | PROT_WRITE,
311 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
312 *lp = p;
313 if (h2g_valid(p)) {
314 unsigned long addr = h2g(p);
315 page_set_flags(addr & TARGET_PAGE_MASK,
316 TARGET_PAGE_ALIGN(addr + len),
317 PAGE_RESERVED);
318 }
319 #else
320 p = qemu_mallocz(sizeof(PageDesc) * L2_SIZE);
321 *lp = p;
322 #endif
323 }
324 return p + (index & (L2_SIZE - 1));
325 }
326
327 static inline PageDesc *page_find(target_ulong index)
328 {
329 PageDesc **lp, *p;
330 lp = page_l1_map(index);
331 if (!lp)
332 return NULL;
333
334 p = *lp;
335 if (!p)
336 return 0;
337 return p + (index & (L2_SIZE - 1));
338 }
339
340 static PhysPageDesc *phys_page_find_alloc(target_phys_addr_t index, int alloc)
341 {
342 void **lp, **p;
343 PhysPageDesc *pd;
344
345 p = (void **)l1_phys_map;
346 #if TARGET_PHYS_ADDR_SPACE_BITS > 32
347
348 #if TARGET_PHYS_ADDR_SPACE_BITS > (32 + L1_BITS)
349 #error unsupported TARGET_PHYS_ADDR_SPACE_BITS
350 #endif
351 lp = p + ((index >> (L1_BITS + L2_BITS)) & (L1_SIZE - 1));
352 p = *lp;
353 if (!p) {
354 /* allocate if not found */
355 if (!alloc)
356 return NULL;
357 p = qemu_vmalloc(sizeof(void *) * L1_SIZE);
358 memset(p, 0, sizeof(void *) * L1_SIZE);
359 *lp = p;
360 }
361 #endif
362 lp = p + ((index >> L2_BITS) & (L1_SIZE - 1));
363 pd = *lp;
364 if (!pd) {
365 int i;
366 /* allocate if not found */
367 if (!alloc)
368 return NULL;
369 pd = qemu_vmalloc(sizeof(PhysPageDesc) * L2_SIZE);
370 *lp = pd;
371 for (i = 0; i < L2_SIZE; i++)
372 pd[i].phys_offset = IO_MEM_UNASSIGNED;
373 }
374 return ((PhysPageDesc *)pd) + (index & (L2_SIZE - 1));
375 }
376
377 static inline PhysPageDesc *phys_page_find(target_phys_addr_t index)
378 {
379 return phys_page_find_alloc(index, 0);
380 }
381
382 #if !defined(CONFIG_USER_ONLY)
383 static void tlb_protect_code(ram_addr_t ram_addr);
384 static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr,
385 target_ulong vaddr);
386 #define mmap_lock() do { } while(0)
387 #define mmap_unlock() do { } while(0)
388 #endif
389
390 #define DEFAULT_CODE_GEN_BUFFER_SIZE (32 * 1024 * 1024)
391
392 #if defined(CONFIG_USER_ONLY)
393 /* Currently it is not recommanded to allocate big chunks of data in
394 user mode. It will change when a dedicated libc will be used */
395 #define USE_STATIC_CODE_GEN_BUFFER
396 #endif
397
398 #ifdef USE_STATIC_CODE_GEN_BUFFER
399 static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE];
400 #endif
401
402 static void code_gen_alloc(unsigned long tb_size)
403 {
404 #ifdef USE_STATIC_CODE_GEN_BUFFER
405 code_gen_buffer = static_code_gen_buffer;
406 code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE;
407 map_exec(code_gen_buffer, code_gen_buffer_size);
408 #else
409 code_gen_buffer_size = tb_size;
410 if (code_gen_buffer_size == 0) {
411 #if defined(CONFIG_USER_ONLY)
412 /* in user mode, phys_ram_size is not meaningful */
413 code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE;
414 #else
415 /* XXX: needs ajustments */
416 code_gen_buffer_size = (unsigned long)(phys_ram_size / 4);
417 #endif
418 }
419 if (code_gen_buffer_size < MIN_CODE_GEN_BUFFER_SIZE)
420 code_gen_buffer_size = MIN_CODE_GEN_BUFFER_SIZE;
421 /* The code gen buffer location may have constraints depending on
422 the host cpu and OS */
423 #if defined(__linux__)
424 {
425 int flags;
426 void *start = NULL;
427
428 flags = MAP_PRIVATE | MAP_ANONYMOUS;
429 #if defined(__x86_64__)
430 flags |= MAP_32BIT;
431 /* Cannot map more than that */
432 if (code_gen_buffer_size > (800 * 1024 * 1024))
433 code_gen_buffer_size = (800 * 1024 * 1024);
434 #elif defined(__sparc_v9__)
435 // Map the buffer below 2G, so we can use direct calls and branches
436 flags |= MAP_FIXED;
437 start = (void *) 0x60000000UL;
438 if (code_gen_buffer_size > (512 * 1024 * 1024))
439 code_gen_buffer_size = (512 * 1024 * 1024);
440 #elif defined(__arm__)
441 /* Map the buffer below 32M, so we can use direct calls and branches */
442 flags |= MAP_FIXED;
443 start = (void *) 0x01000000UL;
444 if (code_gen_buffer_size > 16 * 1024 * 1024)
445 code_gen_buffer_size = 16 * 1024 * 1024;
446 #endif
447 code_gen_buffer = mmap(start, code_gen_buffer_size,
448 PROT_WRITE | PROT_READ | PROT_EXEC,
449 flags, -1, 0);
450 if (code_gen_buffer == MAP_FAILED) {
451 fprintf(stderr, "Could not allocate dynamic translator buffer\n");
452 exit(1);
453 }
454 }
455 #elif defined(__FreeBSD__)
456 {
457 int flags;
458 void *addr = NULL;
459 flags = MAP_PRIVATE | MAP_ANONYMOUS;
460 #if defined(__x86_64__)
461 /* FreeBSD doesn't have MAP_32BIT, use MAP_FIXED and assume
462 * 0x40000000 is free */
463 flags |= MAP_FIXED;
464 addr = (void *)0x40000000;
465 /* Cannot map more than that */
466 if (code_gen_buffer_size > (800 * 1024 * 1024))
467 code_gen_buffer_size = (800 * 1024 * 1024);
468 #endif
469 code_gen_buffer = mmap(addr, code_gen_buffer_size,
470 PROT_WRITE | PROT_READ | PROT_EXEC,
471 flags, -1, 0);
472 if (code_gen_buffer == MAP_FAILED) {
473 fprintf(stderr, "Could not allocate dynamic translator buffer\n");
474 exit(1);
475 }
476 }
477 #else
478 code_gen_buffer = qemu_malloc(code_gen_buffer_size);
479 if (!code_gen_buffer) {
480 fprintf(stderr, "Could not allocate dynamic translator buffer\n");
481 exit(1);
482 }
483 map_exec(code_gen_buffer, code_gen_buffer_size);
484 #endif
485 #endif /* !USE_STATIC_CODE_GEN_BUFFER */
486 map_exec(code_gen_prologue, sizeof(code_gen_prologue));
487 code_gen_buffer_max_size = code_gen_buffer_size -
488 code_gen_max_block_size();
489 code_gen_max_blocks = code_gen_buffer_size / CODE_GEN_AVG_BLOCK_SIZE;
490 tbs = qemu_malloc(code_gen_max_blocks * sizeof(TranslationBlock));
491 }
492
493 /* Must be called before using the QEMU cpus. 'tb_size' is the size
494 (in bytes) allocated to the translation buffer. Zero means default
495 size. */
496 void cpu_exec_init_all(unsigned long tb_size)
497 {
498 cpu_gen_init();
499 code_gen_alloc(tb_size);
500 code_gen_ptr = code_gen_buffer;
501 page_init();
502 #if !defined(CONFIG_USER_ONLY)
503 io_mem_init();
504 #endif
505 }
506
507 #if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
508
509 #define CPU_COMMON_SAVE_VERSION 1
510
511 static void cpu_common_save(QEMUFile *f, void *opaque)
512 {
513 CPUState *env = opaque;
514
515 qemu_put_be32s(f, &env->halted);
516 qemu_put_be32s(f, &env->interrupt_request);
517 }
518
519 static int cpu_common_load(QEMUFile *f, void *opaque, int version_id)
520 {
521 CPUState *env = opaque;
522
523 if (version_id != CPU_COMMON_SAVE_VERSION)
524 return -EINVAL;
525
526 qemu_get_be32s(f, &env->halted);
527 qemu_get_be32s(f, &env->interrupt_request);
528 tlb_flush(env, 1);
529
530 return 0;
531 }
532 #endif
533
534 void cpu_exec_init(CPUState *env)
535 {
536 CPUState **penv;
537 int cpu_index;
538
539 env->next_cpu = NULL;
540 penv = &first_cpu;
541 cpu_index = 0;
542 while (*penv != NULL) {
543 penv = (CPUState **)&(*penv)->next_cpu;
544 cpu_index++;
545 }
546 env->cpu_index = cpu_index;
547 TAILQ_INIT(&env->breakpoints);
548 TAILQ_INIT(&env->watchpoints);
549 *penv = env;
550 #if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
551 register_savevm("cpu_common", cpu_index, CPU_COMMON_SAVE_VERSION,
552 cpu_common_save, cpu_common_load, env);
553 register_savevm("cpu", cpu_index, CPU_SAVE_VERSION,
554 cpu_save, cpu_load, env);
555 #endif
556 }
557
558 static inline void invalidate_page_bitmap(PageDesc *p)
559 {
560 if (p->code_bitmap) {
561 qemu_free(p->code_bitmap);
562 p->code_bitmap = NULL;
563 }
564 p->code_write_count = 0;
565 }
566
567 /* set to NULL all the 'first_tb' fields in all PageDescs */
568 static void page_flush_tb(void)
569 {
570 int i, j;
571 PageDesc *p;
572
573 for(i = 0; i < L1_SIZE; i++) {
574 p = l1_map[i];
575 if (p) {
576 for(j = 0; j < L2_SIZE; j++) {
577 p->first_tb = NULL;
578 invalidate_page_bitmap(p);
579 p++;
580 }
581 }
582 }
583 }
584
585 /* flush all the translation blocks */
586 /* XXX: tb_flush is currently not thread safe */
587 void tb_flush(CPUState *env1)
588 {
589 CPUState *env;
590 #if defined(DEBUG_FLUSH)
591 printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n",
592 (unsigned long)(code_gen_ptr - code_gen_buffer),
593 nb_tbs, nb_tbs > 0 ?
594 ((unsigned long)(code_gen_ptr - code_gen_buffer)) / nb_tbs : 0);
595 #endif
596 if ((unsigned long)(code_gen_ptr - code_gen_buffer) > code_gen_buffer_size)
597 cpu_abort(env1, "Internal error: code buffer overflow\n");
598
599 nb_tbs = 0;
600
601 for(env = first_cpu; env != NULL; env = env->next_cpu) {
602 memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *));
603 }
604
605 memset (tb_phys_hash, 0, CODE_GEN_PHYS_HASH_SIZE * sizeof (void *));
606 page_flush_tb();
607
608 code_gen_ptr = code_gen_buffer;
609 /* XXX: flush processor icache at this point if cache flush is
610 expensive */
611 tb_flush_count++;
612 }
613
614 #ifdef DEBUG_TB_CHECK
615
616 static void tb_invalidate_check(target_ulong address)
617 {
618 TranslationBlock *tb;
619 int i;
620 address &= TARGET_PAGE_MASK;
621 for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) {
622 for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) {
623 if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
624 address >= tb->pc + tb->size)) {
625 printf("ERROR invalidate: address=%08lx PC=%08lx size=%04x\n",
626 address, (long)tb->pc, tb->size);
627 }
628 }
629 }
630 }
631
632 /* verify that all the pages have correct rights for code */
633 static void tb_page_check(void)
634 {
635 TranslationBlock *tb;
636 int i, flags1, flags2;
637
638 for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) {
639 for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) {
640 flags1 = page_get_flags(tb->pc);
641 flags2 = page_get_flags(tb->pc + tb->size - 1);
642 if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
643 printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
644 (long)tb->pc, tb->size, flags1, flags2);
645 }
646 }
647 }
648 }
649
650 static void tb_jmp_check(TranslationBlock *tb)
651 {
652 TranslationBlock *tb1;
653 unsigned int n1;
654
655 /* suppress any remaining jumps to this TB */
656 tb1 = tb->jmp_first;
657 for(;;) {
658 n1 = (long)tb1 & 3;
659 tb1 = (TranslationBlock *)((long)tb1 & ~3);
660 if (n1 == 2)
661 break;
662 tb1 = tb1->jmp_next[n1];
663 }
664 /* check end of list */
665 if (tb1 != tb) {
666 printf("ERROR: jmp_list from 0x%08lx\n", (long)tb);
667 }
668 }
669
670 #endif
671
672 /* invalidate one TB */
673 static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb,
674 int next_offset)
675 {
676 TranslationBlock *tb1;
677 for(;;) {
678 tb1 = *ptb;
679 if (tb1 == tb) {
680 *ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
681 break;
682 }
683 ptb = (TranslationBlock **)((char *)tb1 + next_offset);
684 }
685 }
686
687 static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb)
688 {
689 TranslationBlock *tb1;
690 unsigned int n1;
691
692 for(;;) {
693 tb1 = *ptb;
694 n1 = (long)tb1 & 3;
695 tb1 = (TranslationBlock *)((long)tb1 & ~3);
696 if (tb1 == tb) {
697 *ptb = tb1->page_next[n1];
698 break;
699 }
700 ptb = &tb1->page_next[n1];
701 }
702 }
703
704 static inline void tb_jmp_remove(TranslationBlock *tb, int n)
705 {
706 TranslationBlock *tb1, **ptb;
707 unsigned int n1;
708
709 ptb = &tb->jmp_next[n];
710 tb1 = *ptb;
711 if (tb1) {
712 /* find tb(n) in circular list */
713 for(;;) {
714 tb1 = *ptb;
715 n1 = (long)tb1 & 3;
716 tb1 = (TranslationBlock *)((long)tb1 & ~3);
717 if (n1 == n && tb1 == tb)
718 break;
719 if (n1 == 2) {
720 ptb = &tb1->jmp_first;
721 } else {
722 ptb = &tb1->jmp_next[n1];
723 }
724 }
725 /* now we can suppress tb(n) from the list */
726 *ptb = tb->jmp_next[n];
727
728 tb->jmp_next[n] = NULL;
729 }
730 }
731
732 /* reset the jump entry 'n' of a TB so that it is not chained to
733 another TB */
734 static inline void tb_reset_jump(TranslationBlock *tb, int n)
735 {
736 tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n]));
737 }
738
739 void tb_phys_invalidate(TranslationBlock *tb, target_ulong page_addr)
740 {
741 CPUState *env;
742 PageDesc *p;
743 unsigned int h, n1;
744 target_phys_addr_t phys_pc;
745 TranslationBlock *tb1, *tb2;
746
747 /* remove the TB from the hash list */
748 phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
749 h = tb_phys_hash_func(phys_pc);
750 tb_remove(&tb_phys_hash[h], tb,
751 offsetof(TranslationBlock, phys_hash_next));
752
753 /* remove the TB from the page list */
754 if (tb->page_addr[0] != page_addr) {
755 p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
756 tb_page_remove(&p->first_tb, tb);
757 invalidate_page_bitmap(p);
758 }
759 if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) {
760 p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
761 tb_page_remove(&p->first_tb, tb);
762 invalidate_page_bitmap(p);
763 }
764
765 tb_invalidated_flag = 1;
766
767 /* remove the TB from the hash list */
768 h = tb_jmp_cache_hash_func(tb->pc);
769 for(env = first_cpu; env != NULL; env = env->next_cpu) {
770 if (env->tb_jmp_cache[h] == tb)
771 env->tb_jmp_cache[h] = NULL;
772 }
773
774 /* suppress this TB from the two jump lists */
775 tb_jmp_remove(tb, 0);
776 tb_jmp_remove(tb, 1);
777
778 /* suppress any remaining jumps to this TB */
779 tb1 = tb->jmp_first;
780 for(;;) {
781 n1 = (long)tb1 & 3;
782 if (n1 == 2)
783 break;
784 tb1 = (TranslationBlock *)((long)tb1 & ~3);
785 tb2 = tb1->jmp_next[n1];
786 tb_reset_jump(tb1, n1);
787 tb1->jmp_next[n1] = NULL;
788 tb1 = tb2;
789 }
790 tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */
791
792 tb_phys_invalidate_count++;
793 }
794
795 static inline void set_bits(uint8_t *tab, int start, int len)
796 {
797 int end, mask, end1;
798
799 end = start + len;
800 tab += start >> 3;
801 mask = 0xff << (start & 7);
802 if ((start & ~7) == (end & ~7)) {
803 if (start < end) {
804 mask &= ~(0xff << (end & 7));
805 *tab |= mask;
806 }
807 } else {
808 *tab++ |= mask;
809 start = (start + 8) & ~7;
810 end1 = end & ~7;
811 while (start < end1) {
812 *tab++ = 0xff;
813 start += 8;
814 }
815 if (start < end) {
816 mask = ~(0xff << (end & 7));
817 *tab |= mask;
818 }
819 }
820 }
821
822 static void build_page_bitmap(PageDesc *p)
823 {
824 int n, tb_start, tb_end;
825 TranslationBlock *tb;
826
827 p->code_bitmap = qemu_mallocz(TARGET_PAGE_SIZE / 8);
828 if (!p->code_bitmap)
829 return;
830
831 tb = p->first_tb;
832 while (tb != NULL) {
833 n = (long)tb & 3;
834 tb = (TranslationBlock *)((long)tb & ~3);
835 /* NOTE: this is subtle as a TB may span two physical pages */
836 if (n == 0) {
837 /* NOTE: tb_end may be after the end of the page, but
838 it is not a problem */
839 tb_start = tb->pc & ~TARGET_PAGE_MASK;
840 tb_end = tb_start + tb->size;
841 if (tb_end > TARGET_PAGE_SIZE)
842 tb_end = TARGET_PAGE_SIZE;
843 } else {
844 tb_start = 0;
845 tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK);
846 }
847 set_bits(p->code_bitmap, tb_start, tb_end - tb_start);
848 tb = tb->page_next[n];
849 }
850 }
851
852 TranslationBlock *tb_gen_code(CPUState *env,
853 target_ulong pc, target_ulong cs_base,
854 int flags, int cflags)
855 {
856 TranslationBlock *tb;
857 uint8_t *tc_ptr;
858 target_ulong phys_pc, phys_page2, virt_page2;
859 int code_gen_size;
860
861 phys_pc = get_phys_addr_code(env, pc);
862 tb = tb_alloc(pc);
863 if (!tb) {
864 /* flush must be done */
865 tb_flush(env);
866 /* cannot fail at this point */
867 tb = tb_alloc(pc);
868 /* Don't forget to invalidate previous TB info. */
869 tb_invalidated_flag = 1;
870 }
871 tc_ptr = code_gen_ptr;
872 tb->tc_ptr = tc_ptr;
873 tb->cs_base = cs_base;
874 tb->flags = flags;
875 tb->cflags = cflags;
876 cpu_gen_code(env, tb, &code_gen_size);
877 code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1));
878
879 /* check next page if needed */
880 virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
881 phys_page2 = -1;
882 if ((pc & TARGET_PAGE_MASK) != virt_page2) {
883 phys_page2 = get_phys_addr_code(env, virt_page2);
884 }
885 tb_link_phys(tb, phys_pc, phys_page2);
886 return tb;
887 }
888
889 /* invalidate all TBs which intersect with the target physical page
890 starting in range [start;end[. NOTE: start and end must refer to
891 the same physical page. 'is_cpu_write_access' should be true if called
892 from a real cpu write access: the virtual CPU will exit the current
893 TB if code is modified inside this TB. */
894 void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t end,
895 int is_cpu_write_access)
896 {
897 TranslationBlock *tb, *tb_next, *saved_tb;
898 CPUState *env = cpu_single_env;
899 target_ulong tb_start, tb_end;
900 PageDesc *p;
901 int n;
902 #ifdef TARGET_HAS_PRECISE_SMC
903 int current_tb_not_found = is_cpu_write_access;
904 TranslationBlock *current_tb = NULL;
905 int current_tb_modified = 0;
906 target_ulong current_pc = 0;
907 target_ulong current_cs_base = 0;
908 int current_flags = 0;
909 #endif /* TARGET_HAS_PRECISE_SMC */
910
911 p = page_find(start >> TARGET_PAGE_BITS);
912 if (!p)
913 return;
914 if (!p->code_bitmap &&
915 ++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD &&
916 is_cpu_write_access) {
917 /* build code bitmap */
918 build_page_bitmap(p);
919 }
920
921 /* we remove all the TBs in the range [start, end[ */
922 /* XXX: see if in some cases it could be faster to invalidate all the code */
923 tb = p->first_tb;
924 while (tb != NULL) {
925 n = (long)tb & 3;
926 tb = (TranslationBlock *)((long)tb & ~3);
927 tb_next = tb->page_next[n];
928 /* NOTE: this is subtle as a TB may span two physical pages */
929 if (n == 0) {
930 /* NOTE: tb_end may be after the end of the page, but
931 it is not a problem */
932 tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
933 tb_end = tb_start + tb->size;
934 } else {
935 tb_start = tb->page_addr[1];
936 tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK);
937 }
938 if (!(tb_end <= start || tb_start >= end)) {
939 #ifdef TARGET_HAS_PRECISE_SMC
940 if (current_tb_not_found) {
941 current_tb_not_found = 0;
942 current_tb = NULL;
943 if (env->mem_io_pc) {
944 /* now we have a real cpu fault */
945 current_tb = tb_find_pc(env->mem_io_pc);
946 }
947 }
948 if (current_tb == tb &&
949 (current_tb->cflags & CF_COUNT_MASK) != 1) {
950 /* If we are modifying the current TB, we must stop
951 its execution. We could be more precise by checking
952 that the modification is after the current PC, but it
953 would require a specialized function to partially
954 restore the CPU state */
955
956 current_tb_modified = 1;
957 cpu_restore_state(current_tb, env,
958 env->mem_io_pc, NULL);
959 cpu_get_tb_cpu_state(env, &current_pc, &current_cs_base,
960 &current_flags);
961 }
962 #endif /* TARGET_HAS_PRECISE_SMC */
963 /* we need to do that to handle the case where a signal
964 occurs while doing tb_phys_invalidate() */
965 saved_tb = NULL;
966 if (env) {
967 saved_tb = env->current_tb;
968 env->current_tb = NULL;
969 }
970 tb_phys_invalidate(tb, -1);
971 if (env) {
972 env->current_tb = saved_tb;
973 if (env->interrupt_request && env->current_tb)
974 cpu_interrupt(env, env->interrupt_request);
975 }
976 }
977 tb = tb_next;
978 }
979 #if !defined(CONFIG_USER_ONLY)
980 /* if no code remaining, no need to continue to use slow writes */
981 if (!p->first_tb) {
982 invalidate_page_bitmap(p);
983 if (is_cpu_write_access) {
984 tlb_unprotect_code_phys(env, start, env->mem_io_vaddr);
985 }
986 }
987 #endif
988 #ifdef TARGET_HAS_PRECISE_SMC
989 if (current_tb_modified) {
990 /* we generate a block containing just the instruction
991 modifying the memory. It will ensure that it cannot modify
992 itself */
993 env->current_tb = NULL;
994 tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
995 cpu_resume_from_signal(env, NULL);
996 }
997 #endif
998 }
999
1000 /* len must be <= 8 and start must be a multiple of len */
1001 static inline void tb_invalidate_phys_page_fast(target_phys_addr_t start, int len)
1002 {
1003 PageDesc *p;
1004 int offset, b;
1005 #if 0
1006 if (1) {
1007 if (loglevel) {
1008 fprintf(logfile, "modifying code at 0x%x size=%d EIP=%x PC=%08x\n",
1009 cpu_single_env->mem_io_vaddr, len,
1010 cpu_single_env->eip,
1011 cpu_single_env->eip + (long)cpu_single_env->segs[R_CS].base);
1012 }
1013 }
1014 #endif
1015 p = page_find(start >> TARGET_PAGE_BITS);
1016 if (!p)
1017 return;
1018 if (p->code_bitmap) {
1019 offset = start & ~TARGET_PAGE_MASK;
1020 b = p->code_bitmap[offset >> 3] >> (offset & 7);
1021 if (b & ((1 << len) - 1))
1022 goto do_invalidate;
1023 } else {
1024 do_invalidate:
1025 tb_invalidate_phys_page_range(start, start + len, 1);
1026 }
1027 }
1028
1029 #if !defined(CONFIG_SOFTMMU)
1030 static void tb_invalidate_phys_page(target_phys_addr_t addr,
1031 unsigned long pc, void *puc)
1032 {
1033 TranslationBlock *tb;
1034 PageDesc *p;
1035 int n;
1036 #ifdef TARGET_HAS_PRECISE_SMC
1037 TranslationBlock *current_tb = NULL;
1038 CPUState *env = cpu_single_env;
1039 int current_tb_modified = 0;
1040 target_ulong current_pc = 0;
1041 target_ulong current_cs_base = 0;
1042 int current_flags = 0;
1043 #endif
1044
1045 addr &= TARGET_PAGE_MASK;
1046 p = page_find(addr >> TARGET_PAGE_BITS);
1047 if (!p)
1048 return;
1049 tb = p->first_tb;
1050 #ifdef TARGET_HAS_PRECISE_SMC
1051 if (tb && pc != 0) {
1052 current_tb = tb_find_pc(pc);
1053 }
1054 #endif
1055 while (tb != NULL) {
1056 n = (long)tb & 3;
1057 tb = (TranslationBlock *)((long)tb & ~3);
1058 #ifdef TARGET_HAS_PRECISE_SMC
1059 if (current_tb == tb &&
1060 (current_tb->cflags & CF_COUNT_MASK) != 1) {
1061 /* If we are modifying the current TB, we must stop
1062 its execution. We could be more precise by checking
1063 that the modification is after the current PC, but it
1064 would require a specialized function to partially
1065 restore the CPU state */
1066
1067 current_tb_modified = 1;
1068 cpu_restore_state(current_tb, env, pc, puc);
1069 cpu_get_tb_cpu_state(env, &current_pc, &current_cs_base,
1070 &current_flags);
1071 }
1072 #endif /* TARGET_HAS_PRECISE_SMC */
1073 tb_phys_invalidate(tb, addr);
1074 tb = tb->page_next[n];
1075 }
1076 p->first_tb = NULL;
1077 #ifdef TARGET_HAS_PRECISE_SMC
1078 if (current_tb_modified) {
1079 /* we generate a block containing just the instruction
1080 modifying the memory. It will ensure that it cannot modify
1081 itself */
1082 env->current_tb = NULL;
1083 tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
1084 cpu_resume_from_signal(env, puc);
1085 }
1086 #endif
1087 }
1088 #endif
1089
1090 /* add the tb in the target page and protect it if necessary */
1091 static inline void tb_alloc_page(TranslationBlock *tb,
1092 unsigned int n, target_ulong page_addr)
1093 {
1094 PageDesc *p;
1095 TranslationBlock *last_first_tb;
1096
1097 tb->page_addr[n] = page_addr;
1098 p = page_find_alloc(page_addr >> TARGET_PAGE_BITS);
1099 tb->page_next[n] = p->first_tb;
1100 last_first_tb = p->first_tb;
1101 p->first_tb = (TranslationBlock *)((long)tb | n);
1102 invalidate_page_bitmap(p);
1103
1104 #if defined(TARGET_HAS_SMC) || 1
1105
1106 #if defined(CONFIG_USER_ONLY)
1107 if (p->flags & PAGE_WRITE) {
1108 target_ulong addr;
1109 PageDesc *p2;
1110 int prot;
1111
1112 /* force the host page as non writable (writes will have a
1113 page fault + mprotect overhead) */
1114 page_addr &= qemu_host_page_mask;
1115 prot = 0;
1116 for(addr = page_addr; addr < page_addr + qemu_host_page_size;
1117 addr += TARGET_PAGE_SIZE) {
1118
1119 p2 = page_find (addr >> TARGET_PAGE_BITS);
1120 if (!p2)
1121 continue;
1122 prot |= p2->flags;
1123 p2->flags &= ~PAGE_WRITE;
1124 page_get_flags(addr);
1125 }
1126 mprotect(g2h(page_addr), qemu_host_page_size,
1127 (prot & PAGE_BITS) & ~PAGE_WRITE);
1128 #ifdef DEBUG_TB_INVALIDATE
1129 printf("protecting code page: 0x" TARGET_FMT_lx "\n",
1130 page_addr);
1131 #endif
1132 }
1133 #else
1134 /* if some code is already present, then the pages are already
1135 protected. So we handle the case where only the first TB is
1136 allocated in a physical page */
1137 if (!last_first_tb) {
1138 tlb_protect_code(page_addr);
1139 }
1140 #endif
1141
1142 #endif /* TARGET_HAS_SMC */
1143 }
1144
1145 /* Allocate a new translation block. Flush the translation buffer if
1146 too many translation blocks or too much generated code. */
1147 TranslationBlock *tb_alloc(target_ulong pc)
1148 {
1149 TranslationBlock *tb;
1150
1151 if (nb_tbs >= code_gen_max_blocks ||
1152 (code_gen_ptr - code_gen_buffer) >= code_gen_buffer_max_size)
1153 return NULL;
1154 tb = &tbs[nb_tbs++];
1155 tb->pc = pc;
1156 tb->cflags = 0;
1157 return tb;
1158 }
1159
1160 void tb_free(TranslationBlock *tb)
1161 {
1162 /* In practice this is mostly used for single use temporary TB
1163 Ignore the hard cases and just back up if this TB happens to
1164 be the last one generated. */
1165 if (nb_tbs > 0 && tb == &tbs[nb_tbs - 1]) {
1166 code_gen_ptr = tb->tc_ptr;
1167 nb_tbs--;
1168 }
1169 }
1170
1171 /* add a new TB and link it to the physical page tables. phys_page2 is
1172 (-1) to indicate that only one page contains the TB. */
1173 void tb_link_phys(TranslationBlock *tb,
1174 target_ulong phys_pc, target_ulong phys_page2)
1175 {
1176 unsigned int h;
1177 TranslationBlock **ptb;
1178
1179 /* Grab the mmap lock to stop another thread invalidating this TB
1180 before we are done. */
1181 mmap_lock();
1182 /* add in the physical hash table */
1183 h = tb_phys_hash_func(phys_pc);
1184 ptb = &tb_phys_hash[h];
1185 tb->phys_hash_next = *ptb;
1186 *ptb = tb;
1187
1188 /* add in the page list */
1189 tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
1190 if (phys_page2 != -1)
1191 tb_alloc_page(tb, 1, phys_page2);
1192 else
1193 tb->page_addr[1] = -1;
1194
1195 tb->jmp_first = (TranslationBlock *)((long)tb | 2);
1196 tb->jmp_next[0] = NULL;
1197 tb->jmp_next[1] = NULL;
1198
1199 /* init original jump addresses */
1200 if (tb->tb_next_offset[0] != 0xffff)
1201 tb_reset_jump(tb, 0);
1202 if (tb->tb_next_offset[1] != 0xffff)
1203 tb_reset_jump(tb, 1);
1204
1205 #ifdef DEBUG_TB_CHECK
1206 tb_page_check();
1207 #endif
1208 mmap_unlock();
1209 }
1210
1211 /* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
1212 tb[1].tc_ptr. Return NULL if not found */
1213 TranslationBlock *tb_find_pc(unsigned long tc_ptr)
1214 {
1215 int m_min, m_max, m;
1216 unsigned long v;
1217 TranslationBlock *tb;
1218
1219 if (nb_tbs <= 0)
1220 return NULL;
1221 if (tc_ptr < (unsigned long)code_gen_buffer ||
1222 tc_ptr >= (unsigned long)code_gen_ptr)
1223 return NULL;
1224 /* binary search (cf Knuth) */
1225 m_min = 0;
1226 m_max = nb_tbs - 1;
1227 while (m_min <= m_max) {
1228 m = (m_min + m_max) >> 1;
1229 tb = &tbs[m];
1230 v = (unsigned long)tb->tc_ptr;
1231 if (v == tc_ptr)
1232 return tb;
1233 else if (tc_ptr < v) {
1234 m_max = m - 1;
1235 } else {
1236 m_min = m + 1;
1237 }
1238 }
1239 return &tbs[m_max];
1240 }
1241
1242 static void tb_reset_jump_recursive(TranslationBlock *tb);
1243
1244 static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n)
1245 {
1246 TranslationBlock *tb1, *tb_next, **ptb;
1247 unsigned int n1;
1248
1249 tb1 = tb->jmp_next[n];
1250 if (tb1 != NULL) {
1251 /* find head of list */
1252 for(;;) {
1253 n1 = (long)tb1 & 3;
1254 tb1 = (TranslationBlock *)((long)tb1 & ~3);
1255 if (n1 == 2)
1256 break;
1257 tb1 = tb1->jmp_next[n1];
1258 }
1259 /* we are now sure now that tb jumps to tb1 */
1260 tb_next = tb1;
1261
1262 /* remove tb from the jmp_first list */
1263 ptb = &tb_next->jmp_first;
1264 for(;;) {
1265 tb1 = *ptb;
1266 n1 = (long)tb1 & 3;
1267 tb1 = (TranslationBlock *)((long)tb1 & ~3);
1268 if (n1 == n && tb1 == tb)
1269 break;
1270 ptb = &tb1->jmp_next[n1];
1271 }
1272 *ptb = tb->jmp_next[n];
1273 tb->jmp_next[n] = NULL;
1274
1275 /* suppress the jump to next tb in generated code */
1276 tb_reset_jump(tb, n);
1277
1278 /* suppress jumps in the tb on which we could have jumped */
1279 tb_reset_jump_recursive(tb_next);
1280 }
1281 }
1282
1283 static void tb_reset_jump_recursive(TranslationBlock *tb)
1284 {
1285 tb_reset_jump_recursive2(tb, 0);
1286 tb_reset_jump_recursive2(tb, 1);
1287 }
1288
1289 #if defined(TARGET_HAS_ICE)
1290 static void breakpoint_invalidate(CPUState *env, target_ulong pc)
1291 {
1292 target_phys_addr_t addr;
1293 target_ulong pd;
1294 ram_addr_t ram_addr;
1295 PhysPageDesc *p;
1296
1297 addr = cpu_get_phys_page_debug(env, pc);
1298 p = phys_page_find(addr >> TARGET_PAGE_BITS);
1299 if (!p) {
1300 pd = IO_MEM_UNASSIGNED;
1301 } else {
1302 pd = p->phys_offset;
1303 }
1304 ram_addr = (pd & TARGET_PAGE_MASK) | (pc & ~TARGET_PAGE_MASK);
1305 tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0);
1306 }
1307 #endif
1308
1309 /* Add a watchpoint. */
1310 int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len,
1311 int flags, CPUWatchpoint **watchpoint)
1312 {
1313 target_ulong len_mask = ~(len - 1);
1314 CPUWatchpoint *wp;
1315
1316 /* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */
1317 if ((len != 1 && len != 2 && len != 4 && len != 8) || (addr & ~len_mask)) {
1318 fprintf(stderr, "qemu: tried to set invalid watchpoint at "
1319 TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len);
1320 return -EINVAL;
1321 }
1322 wp = qemu_malloc(sizeof(*wp));
1323 if (!wp)
1324 return -ENOMEM;
1325
1326 wp->vaddr = addr;
1327 wp->len_mask = len_mask;
1328 wp->flags = flags;
1329
1330 /* keep all GDB-injected watchpoints in front */
1331 if (flags & BP_GDB)
1332 TAILQ_INSERT_HEAD(&env->watchpoints, wp, entry);
1333 else
1334 TAILQ_INSERT_TAIL(&env->watchpoints, wp, entry);
1335
1336 tlb_flush_page(env, addr);
1337
1338 if (watchpoint)
1339 *watchpoint = wp;
1340 return 0;
1341 }
1342
1343 /* Remove a specific watchpoint. */
1344 int cpu_watchpoint_remove(CPUState *env, target_ulong addr, target_ulong len,
1345 int flags)
1346 {
1347 target_ulong len_mask = ~(len - 1);
1348 CPUWatchpoint *wp;
1349
1350 TAILQ_FOREACH(wp, &env->watchpoints, entry) {
1351 if (addr == wp->vaddr && len_mask == wp->len_mask
1352 && flags == (wp->flags & ~BP_WATCHPOINT_HIT)) {
1353 cpu_watchpoint_remove_by_ref(env, wp);
1354 return 0;
1355 }
1356 }
1357 return -ENOENT;
1358 }
1359
1360 /* Remove a specific watchpoint by reference. */
1361 void cpu_watchpoint_remove_by_ref(CPUState *env, CPUWatchpoint *watchpoint)
1362 {
1363 TAILQ_REMOVE(&env->watchpoints, watchpoint, entry);
1364
1365 tlb_flush_page(env, watchpoint->vaddr);
1366
1367 qemu_free(watchpoint);
1368 }
1369
1370 /* Remove all matching watchpoints. */
1371 void cpu_watchpoint_remove_all(CPUState *env, int mask)
1372 {
1373 CPUWatchpoint *wp, *next;
1374
1375 TAILQ_FOREACH_SAFE(wp, &env->watchpoints, entry, next) {
1376 if (wp->flags & mask)
1377 cpu_watchpoint_remove_by_ref(env, wp);
1378 }
1379 }
1380
1381 /* Add a breakpoint. */
1382 int cpu_breakpoint_insert(CPUState *env, target_ulong pc, int flags,
1383 CPUBreakpoint **breakpoint)
1384 {
1385 #if defined(TARGET_HAS_ICE)
1386 CPUBreakpoint *bp;
1387
1388 bp = qemu_malloc(sizeof(*bp));
1389 if (!bp)
1390 return -ENOMEM;
1391
1392 bp->pc = pc;
1393 bp->flags = flags;
1394
1395 /* keep all GDB-injected breakpoints in front */
1396 if (flags & BP_GDB)
1397 TAILQ_INSERT_HEAD(&env->breakpoints, bp, entry);
1398 else
1399 TAILQ_INSERT_TAIL(&env->breakpoints, bp, entry);
1400
1401 breakpoint_invalidate(env, pc);
1402
1403 if (breakpoint)
1404 *breakpoint = bp;
1405 return 0;
1406 #else
1407 return -ENOSYS;
1408 #endif
1409 }
1410
1411 /* Remove a specific breakpoint. */
1412 int cpu_breakpoint_remove(CPUState *env, target_ulong pc, int flags)
1413 {
1414 #if defined(TARGET_HAS_ICE)
1415 CPUBreakpoint *bp;
1416
1417 TAILQ_FOREACH(bp, &env->breakpoints, entry) {
1418 if (bp->pc == pc && bp->flags == flags) {
1419 cpu_breakpoint_remove_by_ref(env, bp);
1420 return 0;
1421 }
1422 }
1423 return -ENOENT;
1424 #else
1425 return -ENOSYS;
1426 #endif
1427 }
1428
1429 /* Remove a specific breakpoint by reference. */
1430 void cpu_breakpoint_remove_by_ref(CPUState *env, CPUBreakpoint *breakpoint)
1431 {
1432 #if defined(TARGET_HAS_ICE)
1433 TAILQ_REMOVE(&env->breakpoints, breakpoint, entry);
1434
1435 breakpoint_invalidate(env, breakpoint->pc);
1436
1437 qemu_free(breakpoint);
1438 #endif
1439 }
1440
1441 /* Remove all matching breakpoints. */
1442 void cpu_breakpoint_remove_all(CPUState *env, int mask)
1443 {
1444 #if defined(TARGET_HAS_ICE)
1445 CPUBreakpoint *bp, *next;
1446
1447 TAILQ_FOREACH_SAFE(bp, &env->breakpoints, entry, next) {
1448 if (bp->flags & mask)
1449 cpu_breakpoint_remove_by_ref(env, bp);
1450 }
1451 #endif
1452 }
1453
1454 /* enable or disable single step mode. EXCP_DEBUG is returned by the
1455 CPU loop after each instruction */
1456 void cpu_single_step(CPUState *env, int enabled)
1457 {
1458 #if defined(TARGET_HAS_ICE)
1459 if (env->singlestep_enabled != enabled) {
1460 env->singlestep_enabled = enabled;
1461 /* must flush all the translated code to avoid inconsistancies */
1462 /* XXX: only flush what is necessary */
1463 tb_flush(env);
1464 }
1465 #endif
1466 }
1467
1468 /* enable or disable low levels log */
1469 void cpu_set_log(int log_flags)
1470 {
1471 loglevel = log_flags;
1472 if (loglevel && !logfile) {
1473 logfile = fopen(logfilename, log_append ? "a" : "w");
1474 if (!logfile) {
1475 perror(logfilename);
1476 _exit(1);
1477 }
1478 #if !defined(CONFIG_SOFTMMU)
1479 /* must avoid mmap() usage of glibc by setting a buffer "by hand" */
1480 {
1481 static char logfile_buf[4096];
1482 setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
1483 }
1484 #else
1485 setvbuf(logfile, NULL, _IOLBF, 0);
1486 #endif
1487 log_append = 1;
1488 }
1489 if (!loglevel && logfile) {
1490 fclose(logfile);
1491 logfile = NULL;
1492 }
1493 }
1494
1495 void cpu_set_log_filename(const char *filename)
1496 {
1497 logfilename = strdup(filename);
1498 if (logfile) {
1499 fclose(logfile);
1500 logfile = NULL;
1501 }
1502 cpu_set_log(loglevel);
1503 }
1504
1505 /* mask must never be zero, except for A20 change call */
1506 void cpu_interrupt(CPUState *env, int mask)
1507 {
1508 #if !defined(USE_NPTL)
1509 TranslationBlock *tb;
1510 static spinlock_t interrupt_lock = SPIN_LOCK_UNLOCKED;
1511 #endif
1512 int old_mask;
1513
1514 old_mask = env->interrupt_request;
1515 /* FIXME: This is probably not threadsafe. A different thread could
1516 be in the middle of a read-modify-write operation. */
1517 env->interrupt_request |= mask;
1518 #if defined(USE_NPTL)
1519 /* FIXME: TB unchaining isn't SMP safe. For now just ignore the
1520 problem and hope the cpu will stop of its own accord. For userspace
1521 emulation this often isn't actually as bad as it sounds. Often
1522 signals are used primarily to interrupt blocking syscalls. */
1523 #else
1524 if (use_icount) {
1525 env->icount_decr.u16.high = 0xffff;
1526 #ifndef CONFIG_USER_ONLY
1527 /* CPU_INTERRUPT_EXIT isn't a real interrupt. It just means
1528 an async event happened and we need to process it. */
1529 if (!can_do_io(env)
1530 && (mask & ~(old_mask | CPU_INTERRUPT_EXIT)) != 0) {
1531 cpu_abort(env, "Raised interrupt while not in I/O function");
1532 }
1533 #endif
1534 } else {
1535 tb = env->current_tb;
1536 /* if the cpu is currently executing code, we must unlink it and
1537 all the potentially executing TB */
1538 if (tb && !testandset(&interrupt_lock)) {
1539 env->current_tb = NULL;
1540 tb_reset_jump_recursive(tb);
1541 resetlock(&interrupt_lock);
1542 }
1543 }
1544 #endif
1545 }
1546
1547 void cpu_reset_interrupt(CPUState *env, int mask)
1548 {
1549 env->interrupt_request &= ~mask;
1550 }
1551
1552 const CPULogItem cpu_log_items[] = {
1553 { CPU_LOG_TB_OUT_ASM, "out_asm",
1554 "show generated host assembly code for each compiled TB" },
1555 { CPU_LOG_TB_IN_ASM, "in_asm",
1556 "show target assembly code for each compiled TB" },
1557 { CPU_LOG_TB_OP, "op",
1558 "show micro ops for each compiled TB" },
1559 { CPU_LOG_TB_OP_OPT, "op_opt",
1560 "show micro ops "
1561 #ifdef TARGET_I386
1562 "before eflags optimization and "
1563 #endif
1564 "after liveness analysis" },
1565 { CPU_LOG_INT, "int",
1566 "show interrupts/exceptions in short format" },
1567 { CPU_LOG_EXEC, "exec",
1568 "show trace before each executed TB (lots of logs)" },
1569 { CPU_LOG_TB_CPU, "cpu",
1570 "show CPU state before block translation" },
1571 #ifdef TARGET_I386
1572 { CPU_LOG_PCALL, "pcall",
1573 "show protected mode far calls/returns/exceptions" },
1574 #endif
1575 #ifdef DEBUG_IOPORT
1576 { CPU_LOG_IOPORT, "ioport",
1577 "show all i/o ports accesses" },
1578 #endif
1579 { 0, NULL, NULL },
1580 };
1581
1582 static int cmp1(const char *s1, int n, const char *s2)
1583 {
1584 if (strlen(s2) != n)
1585 return 0;
1586 return memcmp(s1, s2, n) == 0;
1587 }
1588
1589 /* takes a comma separated list of log masks. Return 0 if error. */
1590 int cpu_str_to_log_mask(const char *str)
1591 {
1592 const CPULogItem *item;
1593 int mask;
1594 const char *p, *p1;
1595
1596 p = str;
1597 mask = 0;
1598 for(;;) {
1599 p1 = strchr(p, ',');
1600 if (!p1)
1601 p1 = p + strlen(p);
1602 if(cmp1(p,p1-p,"all")) {
1603 for(item = cpu_log_items; item->mask != 0; item++) {
1604 mask |= item->mask;
1605 }
1606 } else {
1607 for(item = cpu_log_items; item->mask != 0; item++) {
1608 if (cmp1(p, p1 - p, item->name))
1609 goto found;
1610 }
1611 return 0;
1612 }
1613 found:
1614 mask |= item->mask;
1615 if (*p1 != ',')
1616 break;
1617 p = p1 + 1;
1618 }
1619 return mask;
1620 }
1621
1622 void cpu_abort(CPUState *env, const char *fmt, ...)
1623 {
1624 va_list ap;
1625 va_list ap2;
1626
1627 va_start(ap, fmt);
1628 va_copy(ap2, ap);
1629 fprintf(stderr, "qemu: fatal: ");
1630 vfprintf(stderr, fmt, ap);
1631 fprintf(stderr, "\n");
1632 #ifdef TARGET_I386
1633 cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP);
1634 #else
1635 cpu_dump_state(env, stderr, fprintf, 0);
1636 #endif
1637 if (logfile) {
1638 fprintf(logfile, "qemu: fatal: ");
1639 vfprintf(logfile, fmt, ap2);
1640 fprintf(logfile, "\n");
1641 #ifdef TARGET_I386
1642 cpu_dump_state(env, logfile, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP);
1643 #else
1644 cpu_dump_state(env, logfile, fprintf, 0);
1645 #endif
1646 fflush(logfile);
1647 fclose(logfile);
1648 }
1649 va_end(ap2);
1650 va_end(ap);
1651 abort();
1652 }
1653
1654 CPUState *cpu_copy(CPUState *env)
1655 {
1656 CPUState *new_env = cpu_init(env->cpu_model_str);
1657 /* preserve chaining and index */
1658 CPUState *next_cpu = new_env->next_cpu;
1659 int cpu_index = new_env->cpu_index;
1660 memcpy(new_env, env, sizeof(CPUState));
1661 new_env->next_cpu = next_cpu;
1662 new_env->cpu_index = cpu_index;
1663 return new_env;
1664 }
1665
1666 #if !defined(CONFIG_USER_ONLY)
1667
1668 static inline void tlb_flush_jmp_cache(CPUState *env, target_ulong addr)
1669 {
1670 unsigned int i;
1671
1672 /* Discard jump cache entries for any tb which might potentially
1673 overlap the flushed page. */
1674 i = tb_jmp_cache_hash_page(addr - TARGET_PAGE_SIZE);
1675 memset (&env->tb_jmp_cache[i], 0,
1676 TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
1677
1678 i = tb_jmp_cache_hash_page(addr);
1679 memset (&env->tb_jmp_cache[i], 0,
1680 TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
1681 }
1682
1683 /* NOTE: if flush_global is true, also flush global entries (not
1684 implemented yet) */
1685 void tlb_flush(CPUState *env, int flush_global)
1686 {
1687 int i;
1688
1689 #if defined(DEBUG_TLB)
1690 printf("tlb_flush:\n");
1691 #endif
1692 /* must reset current TB so that interrupts cannot modify the
1693 links while we are modifying them */
1694 env->current_tb = NULL;
1695
1696 for(i = 0; i < CPU_TLB_SIZE; i++) {
1697 env->tlb_table[0][i].addr_read = -1;
1698 env->tlb_table[0][i].addr_write = -1;
1699 env->tlb_table[0][i].addr_code = -1;
1700 env->tlb_table[1][i].addr_read = -1;
1701 env->tlb_table[1][i].addr_write = -1;
1702 env->tlb_table[1][i].addr_code = -1;
1703 #if (NB_MMU_MODES >= 3)
1704 env->tlb_table[2][i].addr_read = -1;
1705 env->tlb_table[2][i].addr_write = -1;
1706 env->tlb_table[2][i].addr_code = -1;
1707 #if (NB_MMU_MODES == 4)
1708 env->tlb_table[3][i].addr_read = -1;
1709 env->tlb_table[3][i].addr_write = -1;
1710 env->tlb_table[3][i].addr_code = -1;
1711 #endif
1712 #endif
1713 }
1714
1715 memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *));
1716
1717 #ifdef USE_KQEMU
1718 if (env->kqemu_enabled) {
1719 kqemu_flush(env, flush_global);
1720 }
1721 #endif
1722 tlb_flush_count++;
1723 }
1724
1725 static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr)
1726 {
1727 if (addr == (tlb_entry->addr_read &
1728 (TARGET_PAGE_MASK | TLB_INVALID_MASK)) ||
1729 addr == (tlb_entry->addr_write &
1730 (TARGET_PAGE_MASK | TLB_INVALID_MASK)) ||
1731 addr == (tlb_entry->addr_code &
1732 (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
1733 tlb_entry->addr_read = -1;
1734 tlb_entry->addr_write = -1;
1735 tlb_entry->addr_code = -1;
1736 }
1737 }
1738
1739 void tlb_flush_page(CPUState *env, target_ulong addr)
1740 {
1741 int i;
1742
1743 #if defined(DEBUG_TLB)
1744 printf("tlb_flush_page: " TARGET_FMT_lx "\n", addr);
1745 #endif
1746 /* must reset current TB so that interrupts cannot modify the
1747 links while we are modifying them */
1748 env->current_tb = NULL;
1749
1750 addr &= TARGET_PAGE_MASK;
1751 i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
1752 tlb_flush_entry(&env->tlb_table[0][i], addr);
1753 tlb_flush_entry(&env->tlb_table[1][i], addr);
1754 #if (NB_MMU_MODES >= 3)
1755 tlb_flush_entry(&env->tlb_table[2][i], addr);
1756 #if (NB_MMU_MODES == 4)
1757 tlb_flush_entry(&env->tlb_table[3][i], addr);
1758 #endif
1759 #endif
1760
1761 tlb_flush_jmp_cache(env, addr);
1762
1763 #ifdef USE_KQEMU
1764 if (env->kqemu_enabled) {
1765 kqemu_flush_page(env, addr);
1766 }
1767 #endif
1768 }
1769
1770 /* update the TLBs so that writes to code in the virtual page 'addr'
1771 can be detected */
1772 static void tlb_protect_code(ram_addr_t ram_addr)
1773 {
1774 cpu_physical_memory_reset_dirty(ram_addr,
1775 ram_addr + TARGET_PAGE_SIZE,
1776 CODE_DIRTY_FLAG);
1777 }
1778
1779 /* update the TLB so that writes in physical page 'phys_addr' are no longer
1780 tested for self modifying code */
1781 static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr,
1782 target_ulong vaddr)
1783 {
1784 phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] |= CODE_DIRTY_FLAG;
1785 }
1786
1787 static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry,
1788 unsigned long start, unsigned long length)
1789 {
1790 unsigned long addr;
1791 if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
1792 addr = (tlb_entry->addr_write & TARGET_PAGE_MASK) + tlb_entry->addend;
1793 if ((addr - start) < length) {
1794 tlb_entry->addr_write = (tlb_entry->addr_write & TARGET_PAGE_MASK) | TLB_NOTDIRTY;
1795 }
1796 }
1797 }
1798
1799 void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
1800 int dirty_flags)
1801 {
1802 CPUState *env;
1803 unsigned long length, start1;
1804 int i, mask, len;
1805 uint8_t *p;
1806
1807 start &= TARGET_PAGE_MASK;
1808 end = TARGET_PAGE_ALIGN(end);
1809
1810 length = end - start;
1811 if (length == 0)
1812 return;
1813 len = length >> TARGET_PAGE_BITS;
1814 #ifdef USE_KQEMU
1815 /* XXX: should not depend on cpu context */
1816 env = first_cpu;
1817 if (env->kqemu_enabled) {
1818 ram_addr_t addr;
1819 addr = start;
1820 for(i = 0; i < len; i++) {
1821 kqemu_set_notdirty(env, addr);
1822 addr += TARGET_PAGE_SIZE;
1823 }
1824 }
1825 #endif
1826 mask = ~dirty_flags;
1827 p = phys_ram_dirty + (start >> TARGET_PAGE_BITS);
1828 for(i = 0; i < len; i++)
1829 p[i] &= mask;
1830
1831 /* we modify the TLB cache so that the dirty bit will be set again
1832 when accessing the range */
1833 start1 = start + (unsigned long)phys_ram_base;
1834 for(env = first_cpu; env != NULL; env = env->next_cpu) {
1835 for(i = 0; i < CPU_TLB_SIZE; i++)
1836 tlb_reset_dirty_range(&env->tlb_table[0][i], start1, length);
1837 for(i = 0; i < CPU_TLB_SIZE; i++)
1838 tlb_reset_dirty_range(&env->tlb_table[1][i], start1, length);
1839 #if (NB_MMU_MODES >= 3)
1840 for(i = 0; i < CPU_TLB_SIZE; i++)
1841 tlb_reset_dirty_range(&env->tlb_table[2][i], start1, length);
1842 #if (NB_MMU_MODES == 4)
1843 for(i = 0; i < CPU_TLB_SIZE; i++)
1844 tlb_reset_dirty_range(&env->tlb_table[3][i], start1, length);
1845 #endif
1846 #endif
1847 }
1848 }
1849
1850 int cpu_physical_memory_set_dirty_tracking(int enable)
1851 {
1852 in_migration = enable;
1853 return 0;
1854 }
1855
1856 int cpu_physical_memory_get_dirty_tracking(void)
1857 {
1858 return in_migration;
1859 }
1860
1861 void cpu_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, target_phys_addr_t end_addr)
1862 {
1863 if (kvm_enabled())
1864 kvm_physical_sync_dirty_bitmap(start_addr, end_addr);
1865 }
1866
1867 static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry)
1868 {
1869 ram_addr_t ram_addr;
1870
1871 if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
1872 ram_addr = (tlb_entry->addr_write & TARGET_PAGE_MASK) +
1873 tlb_entry->addend - (unsigned long)phys_ram_base;
1874 if (!cpu_physical_memory_is_dirty(ram_addr)) {
1875 tlb_entry->addr_write |= TLB_NOTDIRTY;
1876 }
1877 }
1878 }
1879
1880 /* update the TLB according to the current state of the dirty bits */
1881 void cpu_tlb_update_dirty(CPUState *env)
1882 {
1883 int i;
1884 for(i = 0; i < CPU_TLB_SIZE; i++)
1885 tlb_update_dirty(&env->tlb_table[0][i]);
1886 for(i = 0; i < CPU_TLB_SIZE; i++)
1887 tlb_update_dirty(&env->tlb_table[1][i]);
1888 #if (NB_MMU_MODES >= 3)
1889 for(i = 0; i < CPU_TLB_SIZE; i++)
1890 tlb_update_dirty(&env->tlb_table[2][i]);
1891 #if (NB_MMU_MODES == 4)
1892 for(i = 0; i < CPU_TLB_SIZE; i++)
1893 tlb_update_dirty(&env->tlb_table[3][i]);
1894 #endif
1895 #endif
1896 }
1897
1898 static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, target_ulong vaddr)
1899 {
1900 if (tlb_entry->addr_write == (vaddr | TLB_NOTDIRTY))
1901 tlb_entry->addr_write = vaddr;
1902 }
1903
1904 /* update the TLB corresponding to virtual page vaddr
1905 so that it is no longer dirty */
1906 static inline void tlb_set_dirty(CPUState *env, target_ulong vaddr)
1907 {
1908 int i;
1909
1910 vaddr &= TARGET_PAGE_MASK;
1911 i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
1912 tlb_set_dirty1(&env->tlb_table[0][i], vaddr);
1913 tlb_set_dirty1(&env->tlb_table[1][i], vaddr);
1914 #if (NB_MMU_MODES >= 3)
1915 tlb_set_dirty1(&env->tlb_table[2][i], vaddr);
1916 #if (NB_MMU_MODES == 4)
1917 tlb_set_dirty1(&env->tlb_table[3][i], vaddr);
1918 #endif
1919 #endif
1920 }
1921
1922 /* add a new TLB entry. At most one entry for a given virtual address
1923 is permitted. Return 0 if OK or 2 if the page could not be mapped
1924 (can only happen in non SOFTMMU mode for I/O pages or pages
1925 conflicting with the host address space). */
1926 int tlb_set_page_exec(CPUState *env, target_ulong vaddr,
1927 target_phys_addr_t paddr, int prot,
1928 int mmu_idx, int is_softmmu)
1929 {
1930 PhysPageDesc *p;
1931 unsigned long pd;
1932 unsigned int index;
1933 target_ulong address;
1934 target_ulong code_address;
1935 target_phys_addr_t addend;
1936 int ret;
1937 CPUTLBEntry *te;
1938 CPUWatchpoint *wp;
1939 target_phys_addr_t iotlb;
1940
1941 p = phys_page_find(paddr >> TARGET_PAGE_BITS);
1942 if (!p) {
1943 pd = IO_MEM_UNASSIGNED;
1944 } else {
1945 pd = p->phys_offset;
1946 }
1947 #if defined(DEBUG_TLB)
1948 printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x%08x prot=%x idx=%d smmu=%d pd=0x%08lx\n",
1949 vaddr, (int)paddr, prot, mmu_idx, is_softmmu, pd);
1950 #endif
1951
1952 ret = 0;
1953 address = vaddr;
1954 if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) {
1955 /* IO memory case (romd handled later) */
1956 address |= TLB_MMIO;
1957 }
1958 addend = (unsigned long)phys_ram_base + (pd & TARGET_PAGE_MASK);
1959 if ((pd & ~TARGET_PAGE_MASK) <= IO_MEM_ROM) {
1960 /* Normal RAM. */
1961 iotlb = pd & TARGET_PAGE_MASK;
1962 if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM)
1963 iotlb |= IO_MEM_NOTDIRTY;
1964 else
1965 iotlb |= IO_MEM_ROM;
1966 } else {
1967 /* IO handlers are currently passed a phsical address.
1968 It would be nice to pass an offset from the base address
1969 of that region. This would avoid having to special case RAM,
1970 and avoid full address decoding in every device.
1971 We can't use the high bits of pd for this because
1972 IO_MEM_ROMD uses these as a ram address. */
1973 iotlb = (pd & ~TARGET_PAGE_MASK);
1974 if (p) {
1975 iotlb += p->region_offset;
1976 } else {
1977 iotlb += paddr;
1978 }
1979 }
1980
1981 code_address = address;
1982 /* Make accesses to pages with watchpoints go via the
1983 watchpoint trap routines. */
1984 TAILQ_FOREACH(wp, &env->watchpoints, entry) {
1985 if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) {
1986 iotlb = io_mem_watch + paddr;
1987 /* TODO: The memory case can be optimized by not trapping
1988 reads of pages with a write breakpoint. */
1989 address |= TLB_MMIO;
1990 }
1991 }
1992
1993 index = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
1994 env->iotlb[mmu_idx][index] = iotlb - vaddr;
1995 te = &env->tlb_table[mmu_idx][index];
1996 te->addend = addend - vaddr;
1997 if (prot & PAGE_READ) {
1998 te->addr_read = address;
1999 } else {
2000 te->addr_read = -1;
2001 }
2002
2003 if (prot & PAGE_EXEC) {
2004 te->addr_code = code_address;
2005 } else {
2006 te->addr_code = -1;
2007 }
2008 if (prot & PAGE_WRITE) {
2009 if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM ||
2010 (pd & IO_MEM_ROMD)) {
2011 /* Write access calls the I/O callback. */
2012 te->addr_write = address | TLB_MMIO;
2013 } else if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM &&
2014 !cpu_physical_memory_is_dirty(pd)) {
2015 te->addr_write = address | TLB_NOTDIRTY;
2016 } else {
2017 te->addr_write = address;
2018 }
2019 } else {
2020 te->addr_write = -1;
2021 }
2022 return ret;
2023 }
2024
2025 #else
2026
2027 void tlb_flush(CPUState *env, int flush_global)
2028 {
2029 }
2030
2031 void tlb_flush_page(CPUState *env, target_ulong addr)
2032 {
2033 }
2034
2035 int tlb_set_page_exec(CPUState *env, target_ulong vaddr,
2036 target_phys_addr_t paddr, int prot,
2037 int mmu_idx, int is_softmmu)
2038 {
2039 return 0;
2040 }
2041
2042 /* dump memory mappings */
2043 void page_dump(FILE *f)
2044 {
2045 unsigned long start, end;
2046 int i, j, prot, prot1;
2047 PageDesc *p;
2048
2049 fprintf(f, "%-8s %-8s %-8s %s\n",
2050 "start", "end", "size", "prot");
2051 start = -1;
2052 end = -1;
2053 prot = 0;
2054 for(i = 0; i <= L1_SIZE; i++) {
2055 if (i < L1_SIZE)
2056 p = l1_map[i];
2057 else
2058 p = NULL;
2059 for(j = 0;j < L2_SIZE; j++) {
2060 if (!p)
2061 prot1 = 0;
2062 else
2063 prot1 = p[j].flags;
2064 if (prot1 != prot) {
2065 end = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS);
2066 if (start != -1) {
2067 fprintf(f, "%08lx-%08lx %08lx %c%c%c\n",
2068 start, end, end - start,
2069 prot & PAGE_READ ? 'r' : '-',
2070 prot & PAGE_WRITE ? 'w' : '-',
2071 prot & PAGE_EXEC ? 'x' : '-');
2072 }
2073 if (prot1 != 0)
2074 start = end;
2075 else
2076 start = -1;
2077 prot = prot1;
2078 }
2079 if (!p)
2080 break;
2081 }
2082 }
2083 }
2084
2085 int page_get_flags(target_ulong address)
2086 {
2087 PageDesc *p;
2088
2089 p = page_find(address >> TARGET_PAGE_BITS);
2090 if (!p)
2091 return 0;
2092 return p->flags;
2093 }
2094
2095 /* modify the flags of a page and invalidate the code if
2096 necessary. The flag PAGE_WRITE_ORG is positionned automatically
2097 depending on PAGE_WRITE */
2098 void page_set_flags(target_ulong start, target_ulong end, int flags)
2099 {
2100 PageDesc *p;
2101 target_ulong addr;
2102
2103 /* mmap_lock should already be held. */
2104 start = start & TARGET_PAGE_MASK;
2105 end = TARGET_PAGE_ALIGN(end);
2106 if (flags & PAGE_WRITE)
2107 flags |= PAGE_WRITE_ORG;
2108 for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
2109 p = page_find_alloc(addr >> TARGET_PAGE_BITS);
2110 /* We may be called for host regions that are outside guest
2111 address space. */
2112 if (!p)
2113 return;
2114 /* if the write protection is set, then we invalidate the code
2115 inside */
2116 if (!(p->flags & PAGE_WRITE) &&
2117 (flags & PAGE_WRITE) &&
2118 p->first_tb) {
2119 tb_invalidate_phys_page(addr, 0, NULL);
2120 }
2121 p->flags = flags;
2122 }
2123 }
2124
2125 int page_check_range(target_ulong start, target_ulong len, int flags)
2126 {
2127 PageDesc *p;
2128 target_ulong end;
2129 target_ulong addr;
2130
2131 if (start + len < start)
2132 /* we've wrapped around */
2133 return -1;
2134
2135 end = TARGET_PAGE_ALIGN(start+len); /* must do before we loose bits in the next step */
2136 start = start & TARGET_PAGE_MASK;
2137
2138 for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
2139 p = page_find(addr >> TARGET_PAGE_BITS);
2140 if( !p )
2141 return -1;
2142 if( !(p->flags & PAGE_VALID) )
2143 return -1;
2144
2145 if ((flags & PAGE_READ) && !(p->flags & PAGE_READ))
2146 return -1;
2147 if (flags & PAGE_WRITE) {
2148 if (!(p->flags & PAGE_WRITE_ORG))
2149 return -1;
2150 /* unprotect the page if it was put read-only because it
2151 contains translated code */
2152 if (!(p->flags & PAGE_WRITE)) {
2153 if (!page_unprotect(addr, 0, NULL))
2154 return -1;
2155 }
2156 return 0;
2157 }
2158 }
2159 return 0;
2160 }
2161
2162 /* called from signal handler: invalidate the code and unprotect the
2163 page. Return TRUE if the fault was succesfully handled. */
2164 int page_unprotect(target_ulong address, unsigned long pc, void *puc)
2165 {
2166 unsigned int page_index, prot, pindex;
2167 PageDesc *p, *p1;
2168 target_ulong host_start, host_end, addr;
2169
2170 /* Technically this isn't safe inside a signal handler. However we
2171 know this only ever happens in a synchronous SEGV handler, so in
2172 practice it seems to be ok. */
2173 mmap_lock();
2174
2175 host_start = address & qemu_host_page_mask;
2176 page_index = host_start >> TARGET_PAGE_BITS;
2177 p1 = page_find(page_index);
2178 if (!p1) {
2179 mmap_unlock();
2180 return 0;
2181 }
2182 host_end = host_start + qemu_host_page_size;
2183 p = p1;
2184 prot = 0;
2185 for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) {
2186 prot |= p->flags;
2187 p++;
2188 }
2189 /* if the page was really writable, then we change its
2190 protection back to writable */
2191 if (prot & PAGE_WRITE_ORG) {
2192 pindex = (address - host_start) >> TARGET_PAGE_BITS;
2193 if (!(p1[pindex].flags & PAGE_WRITE)) {
2194 mprotect((void *)g2h(host_start), qemu_host_page_size,
2195 (prot & PAGE_BITS) | PAGE_WRITE);
2196 p1[pindex].flags |= PAGE_WRITE;
2197 /* and since the content will be modified, we must invalidate
2198 the corresponding translated code. */
2199 tb_invalidate_phys_page(address, pc, puc);
2200 #ifdef DEBUG_TB_CHECK
2201 tb_invalidate_check(address);
2202 #endif
2203 mmap_unlock();
2204 return 1;
2205 }
2206 }
2207 mmap_unlock();
2208 return 0;
2209 }
2210
2211 static inline void tlb_set_dirty(CPUState *env,
2212 unsigned long addr, target_ulong vaddr)
2213 {
2214 }
2215 #endif /* defined(CONFIG_USER_ONLY) */
2216
2217 #if !defined(CONFIG_USER_ONLY)
2218
2219 static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
2220 ram_addr_t memory, ram_addr_t region_offset);
2221 static void *subpage_init (target_phys_addr_t base, ram_addr_t *phys,
2222 ram_addr_t orig_memory, ram_addr_t region_offset);
2223 #define CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2, \
2224 need_subpage) \
2225 do { \
2226 if (addr > start_addr) \
2227 start_addr2 = 0; \
2228 else { \
2229 start_addr2 = start_addr & ~TARGET_PAGE_MASK; \
2230 if (start_addr2 > 0) \
2231 need_subpage = 1; \
2232 } \
2233 \
2234 if ((start_addr + orig_size) - addr >= TARGET_PAGE_SIZE) \
2235 end_addr2 = TARGET_PAGE_SIZE - 1; \
2236 else { \
2237 end_addr2 = (start_addr + orig_size - 1) & ~TARGET_PAGE_MASK; \
2238 if (end_addr2 < TARGET_PAGE_SIZE - 1) \
2239 need_subpage = 1; \
2240 } \
2241 } while (0)
2242
2243 /* register physical memory. 'size' must be a multiple of the target
2244 page size. If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
2245 io memory page. The address used when calling the IO function is
2246 the offset from the start of the region, plus region_offset. Both
2247 start_region and regon_offset are rounded down to a page boundary
2248 before calculating this offset. This should not be a problem unless
2249 the low bits of start_addr and region_offset differ. */
2250 void cpu_register_physical_memory_offset(target_phys_addr_t start_addr,
2251 ram_addr_t size,
2252 ram_addr_t phys_offset,
2253 ram_addr_t region_offset)
2254 {
2255 target_phys_addr_t addr, end_addr;
2256 PhysPageDesc *p;
2257 CPUState *env;
2258 ram_addr_t orig_size = size;
2259 void *subpage;
2260
2261 #ifdef USE_KQEMU
2262 /* XXX: should not depend on cpu context */
2263 env = first_cpu;
2264 if (env->kqemu_enabled) {
2265 kqemu_set_phys_mem(start_addr, size, phys_offset);
2266 }
2267 #endif
2268 if (kvm_enabled())
2269 kvm_set_phys_mem(start_addr, size, phys_offset);
2270
2271 region_offset &= TARGET_PAGE_MASK;
2272 size = (size + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK;
2273 end_addr = start_addr + (target_phys_addr_t)size;
2274 for(addr = start_addr; addr != end_addr; addr += TARGET_PAGE_SIZE) {
2275 p = phys_page_find(addr >> TARGET_PAGE_BITS);
2276 if (p && p->phys_offset != IO_MEM_UNASSIGNED) {
2277 ram_addr_t orig_memory = p->phys_offset;
2278 target_phys_addr_t start_addr2, end_addr2;
2279 int need_subpage = 0;
2280
2281 CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2,
2282 need_subpage);
2283 if (need_subpage || phys_offset & IO_MEM_SUBWIDTH) {
2284 if (!(orig_memory & IO_MEM_SUBPAGE)) {
2285 subpage = subpage_init((addr & TARGET_PAGE_MASK),
2286 &p->phys_offset, orig_memory,
2287 p->region_offset);
2288 } else {
2289 subpage = io_mem_opaque[(orig_memory & ~TARGET_PAGE_MASK)
2290 >> IO_MEM_SHIFT];
2291 }
2292 subpage_register(subpage, start_addr2, end_addr2, phys_offset,
2293 region_offset);
2294 p->region_offset = 0;
2295 } else {
2296 p->phys_offset = phys_offset;
2297 if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM ||
2298 (phys_offset & IO_MEM_ROMD))
2299 phys_offset += TARGET_PAGE_SIZE;
2300 }
2301 } else {
2302 p = phys_page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
2303 p->phys_offset = phys_offset;
2304 p->region_offset = region_offset;
2305 if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM ||
2306 (phys_offset & IO_MEM_ROMD)) {
2307 phys_offset += TARGET_PAGE_SIZE;
2308 } else {
2309 target_phys_addr_t start_addr2, end_addr2;
2310 int need_subpage = 0;
2311
2312 CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr,
2313 end_addr2, need_subpage);
2314
2315 if (need_subpage || phys_offset & IO_MEM_SUBWIDTH) {
2316 subpage = subpage_init((addr & TARGET_PAGE_MASK),
2317 &p->phys_offset, IO_MEM_UNASSIGNED,
2318 0);
2319 subpage_register(subpage, start_addr2, end_addr2,
2320 phys_offset, region_offset);
2321 p->region_offset = 0;
2322 }
2323 }
2324 }
2325 region_offset += TARGET_PAGE_SIZE;
2326 }
2327
2328 /* since each CPU stores ram addresses in its TLB cache, we must
2329 reset the modified entries */
2330 /* XXX: slow ! */
2331 for(env = first_cpu; env != NULL; env = env->next_cpu) {
2332 tlb_flush(env, 1);
2333 }
2334 }
2335
2336 /* XXX: temporary until new memory mapping API */
2337 ram_addr_t cpu_get_physical_page_desc(target_phys_addr_t addr)
2338 {
2339 PhysPageDesc *p;
2340
2341 p = phys_page_find(addr >> TARGET_PAGE_BITS);
2342 if (!p)
2343 return IO_MEM_UNASSIGNED;
2344 return p->phys_offset;
2345 }
2346
2347 void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size)
2348 {
2349 if (kvm_enabled())
2350 kvm_coalesce_mmio_region(addr, size);
2351 }
2352
2353 void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size)
2354 {
2355 if (kvm_enabled())
2356 kvm_uncoalesce_mmio_region(addr, size);
2357 }
2358
2359 /* XXX: better than nothing */
2360 ram_addr_t qemu_ram_alloc(ram_addr_t size)
2361 {
2362 ram_addr_t addr;
2363 if ((phys_ram_alloc_offset + size) > phys_ram_size) {
2364 fprintf(stderr, "Not enough memory (requested_size = %" PRIu64 ", max memory = %" PRIu64 ")\n",
2365 (uint64_t)size, (uint64_t)phys_ram_size);
2366 abort();
2367 }
2368 addr = phys_ram_alloc_offset;
2369 phys_ram_alloc_offset = TARGET_PAGE_ALIGN(phys_ram_alloc_offset + size);
2370 return addr;
2371 }
2372
2373 void qemu_ram_free(ram_addr_t addr)
2374 {
2375 }
2376
2377 static uint32_t unassigned_mem_readb(void *opaque, target_phys_addr_t addr)
2378 {
2379 #ifdef DEBUG_UNASSIGNED
2380 printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
2381 #endif
2382 #if defined(TARGET_SPARC) || defined(TARGET_CRIS)
2383 do_unassigned_access(addr, 0, 0, 0, 1);
2384 #endif
2385 return 0;
2386 }
2387
2388 static uint32_t unassigned_mem_readw(void *opaque, target_phys_addr_t addr)
2389 {
2390 #ifdef DEBUG_UNASSIGNED
2391 printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
2392 #endif
2393 #if defined(TARGET_SPARC) || defined(TARGET_CRIS)
2394 do_unassigned_access(addr, 0, 0, 0, 2);
2395 #endif
2396 return 0;
2397 }
2398
2399 static uint32_t unassigned_mem_readl(void *opaque, target_phys_addr_t addr)
2400 {
2401 #ifdef DEBUG_UNASSIGNED
2402 printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
2403 #endif
2404 #if defined(TARGET_SPARC) || defined(TARGET_CRIS)
2405 do_unassigned_access(addr, 0, 0, 0, 4);
2406 #endif
2407 return 0;
2408 }
2409
2410 static void unassigned_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
2411 {
2412 #ifdef DEBUG_UNASSIGNED
2413 printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val);
2414 #endif
2415 #if defined(TARGET_SPARC) || defined(TARGET_CRIS)
2416 do_unassigned_access(addr, 1, 0, 0, 1);
2417 #endif
2418 }
2419
2420 static void unassigned_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
2421 {
2422 #ifdef DEBUG_UNASSIGNED
2423 printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val);
2424 #endif
2425 #if defined(TARGET_SPARC) || defined(TARGET_CRIS)
2426 do_unassigned_access(addr, 1, 0, 0, 2);
2427 #endif
2428 }
2429
2430 static void unassigned_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
2431 {
2432 #ifdef DEBUG_UNASSIGNED
2433 printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val);
2434 #endif
2435 #if defined(TARGET_SPARC) || defined(TARGET_CRIS)
2436 do_unassigned_access(addr, 1, 0, 0, 4);
2437 #endif
2438 }
2439
2440 static CPUReadMemoryFunc *unassigned_mem_read[3] = {
2441 unassigned_mem_readb,
2442 unassigned_mem_readw,
2443 unassigned_mem_readl,
2444 };
2445
2446 static CPUWriteMemoryFunc *unassigned_mem_write[3] = {
2447 unassigned_mem_writeb,
2448 unassigned_mem_writew,
2449 unassigned_mem_writel,
2450 };
2451
2452 static void notdirty_mem_writeb(void *opaque, target_phys_addr_t ram_addr,
2453 uint32_t val)
2454 {
2455 int dirty_flags;
2456 dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
2457 if (!(dirty_flags & CODE_DIRTY_FLAG)) {
2458 #if !defined(CONFIG_USER_ONLY)
2459 tb_invalidate_phys_page_fast(ram_addr, 1);
2460 dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
2461 #endif
2462 }
2463 stb_p(phys_ram_base + ram_addr, val);
2464 #ifdef USE_KQEMU
2465 if (cpu_single_env->kqemu_enabled &&
2466 (dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK)
2467 kqemu_modify_page(cpu_single_env, ram_addr);
2468 #endif
2469 dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
2470 phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags;
2471 /* we remove the notdirty callback only if the code has been
2472 flushed */
2473 if (dirty_flags == 0xff)
2474 tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr);
2475 }
2476
2477 static void notdirty_mem_writew(void *opaque, target_phys_addr_t ram_addr,
2478 uint32_t val)
2479 {
2480 int dirty_flags;
2481 dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
2482 if (!(dirty_flags & CODE_DIRTY_FLAG)) {
2483 #if !defined(CONFIG_USER_ONLY)
2484 tb_invalidate_phys_page_fast(ram_addr, 2);
2485 dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
2486 #endif
2487 }
2488 stw_p(phys_ram_base + ram_addr, val);
2489 #ifdef USE_KQEMU
2490 if (cpu_single_env->kqemu_enabled &&
2491 (dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK)
2492 kqemu_modify_page(cpu_single_env, ram_addr);
2493 #endif
2494 dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
2495 phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags;
2496 /* we remove the notdirty callback only if the code has been
2497 flushed */
2498 if (dirty_flags == 0xff)
2499 tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr);
2500 }
2501
2502 static void notdirty_mem_writel(void *opaque, target_phys_addr_t ram_addr,
2503 uint32_t val)
2504 {
2505 int dirty_flags;
2506 dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
2507 if (!(dirty_flags & CODE_DIRTY_FLAG)) {
2508 #if !defined(CONFIG_USER_ONLY)
2509 tb_invalidate_phys_page_fast(ram_addr, 4);
2510 dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
2511 #endif
2512 }
2513 stl_p(phys_ram_base + ram_addr, val);
2514 #ifdef USE_KQEMU
2515 if (cpu_single_env->kqemu_enabled &&
2516 (dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK)
2517 kqemu_modify_page(cpu_single_env, ram_addr);
2518 #endif
2519 dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
2520 phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags;
2521 /* we remove the notdirty callback only if the code has been
2522 flushed */
2523 if (dirty_flags == 0xff)
2524 tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr);
2525 }
2526
2527 static CPUReadMemoryFunc *error_mem_read[3] = {
2528 NULL, /* never used */
2529 NULL, /* never used */
2530 NULL, /* never used */
2531 };
2532
2533 static CPUWriteMemoryFunc *notdirty_mem_write[3] = {
2534 notdirty_mem_writeb,
2535 notdirty_mem_writew,
2536 notdirty_mem_writel,
2537 };
2538
2539 /* Generate a debug exception if a watchpoint has been hit. */
2540 static void check_watchpoint(int offset, int len_mask, int flags)
2541 {
2542 CPUState *env = cpu_single_env;
2543 target_ulong pc, cs_base;
2544 TranslationBlock *tb;
2545 target_ulong vaddr;
2546 CPUWatchpoint *wp;
2547 int cpu_flags;
2548
2549 if (env->watchpoint_hit) {
2550 /* We re-entered the check after replacing the TB. Now raise
2551 * the debug interrupt so that is will trigger after the
2552 * current instruction. */
2553 cpu_interrupt(env, CPU_INTERRUPT_DEBUG);
2554 return;
2555 }
2556 vaddr = (env->mem_io_vaddr & TARGET_PAGE_MASK) + offset;
2557 TAILQ_FOREACH(wp, &env->watchpoints, entry) {
2558 if ((vaddr == (wp->vaddr & len_mask) ||
2559 (vaddr & wp->len_mask) == wp->vaddr) && (wp->flags & flags)) {
2560 wp->flags |= BP_WATCHPOINT_HIT;
2561 if (!env->watchpoint_hit) {
2562 env->watchpoint_hit = wp;
2563 tb = tb_find_pc(env->mem_io_pc);
2564 if (!tb) {
2565 cpu_abort(env, "check_watchpoint: could not find TB for "
2566 "pc=%p", (void *)env->mem_io_pc);
2567 }
2568 cpu_restore_state(tb, env, env->mem_io_pc, NULL);
2569 tb_phys_invalidate(tb, -1);
2570 if (wp->flags & BP_STOP_BEFORE_ACCESS) {
2571 env->exception_index = EXCP_DEBUG;
2572 } else {
2573 cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags);
2574 tb_gen_code(env, pc, cs_base, cpu_flags, 1);
2575 }
2576 cpu_resume_from_signal(env, NULL);
2577 }
2578 } else {
2579 wp->flags &= ~BP_WATCHPOINT_HIT;
2580 }
2581 }
2582 }
2583
2584 /* Watchpoint access routines. Watchpoints are inserted using TLB tricks,
2585 so these check for a hit then pass through to the normal out-of-line
2586 phys routines. */
2587 static uint32_t watch_mem_readb(void *opaque, target_phys_addr_t addr)
2588 {
2589 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x0, BP_MEM_READ);
2590 return ldub_phys(addr);
2591 }
2592
2593 static uint32_t watch_mem_readw(void *opaque, target_phys_addr_t addr)
2594 {
2595 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x1, BP_MEM_READ);
2596 return lduw_phys(addr);
2597 }
2598
2599 static uint32_t watch_mem_readl(void *opaque, target_phys_addr_t addr)
2600 {
2601 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x3, BP_MEM_READ);
2602 return ldl_phys(addr);
2603 }
2604
2605 static void watch_mem_writeb(void *opaque, target_phys_addr_t addr,
2606 uint32_t val)
2607 {
2608 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x0, BP_MEM_WRITE);
2609 stb_phys(addr, val);
2610 }
2611
2612 static void watch_mem_writew(void *opaque, target_phys_addr_t addr,
2613 uint32_t val)
2614 {
2615 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x1, BP_MEM_WRITE);
2616 stw_phys(addr, val);
2617 }
2618
2619 static void watch_mem_writel(void *opaque, target_phys_addr_t addr,
2620 uint32_t val)
2621 {
2622 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x3, BP_MEM_WRITE);
2623 stl_phys(addr, val);
2624 }
2625
2626 static CPUReadMemoryFunc *watch_mem_read[3] = {
2627 watch_mem_readb,
2628 watch_mem_readw,
2629 watch_mem_readl,
2630 };
2631
2632 static CPUWriteMemoryFunc *watch_mem_write[3] = {
2633 watch_mem_writeb,
2634 watch_mem_writew,
2635 watch_mem_writel,
2636 };
2637
2638 static inline uint32_t subpage_readlen (subpage_t *mmio, target_phys_addr_t addr,
2639 unsigned int len)
2640 {
2641 uint32_t ret;
2642 unsigned int idx;
2643
2644 idx = SUBPAGE_IDX(addr);
2645 #if defined(DEBUG_SUBPAGE)
2646 printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__,
2647 mmio, len, addr, idx);
2648 #endif
2649 ret = (**mmio->mem_read[idx][len])(mmio->opaque[idx][0][len],
2650 addr + mmio->region_offset[idx][0][len]);
2651
2652 return ret;
2653 }
2654
2655 static inline void subpage_writelen (subpage_t *mmio, target_phys_addr_t addr,
2656 uint32_t value, unsigned int len)
2657 {
2658 unsigned int idx;
2659
2660 idx = SUBPAGE_IDX(addr);
2661 #if defined(DEBUG_SUBPAGE)
2662 printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d value %08x\n", __func__,
2663 mmio, len, addr, idx, value);
2664 #endif
2665 (**mmio->mem_write[idx][len])(mmio->opaque[idx][1][len],
2666 addr + mmio->region_offset[idx][1][len],
2667 value);
2668 }
2669
2670 static uint32_t subpage_readb (void *opaque, target_phys_addr_t addr)
2671 {
2672 #if defined(DEBUG_SUBPAGE)
2673 printf("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
2674 #endif
2675
2676 return subpage_readlen(opaque, addr, 0);
2677 }
2678
2679 static void subpage_writeb (void *opaque, target_phys_addr_t addr,
2680 uint32_t value)
2681 {
2682 #if defined(DEBUG_SUBPAGE)
2683 printf("%s: addr " TARGET_FMT_plx " val %08x\n", __func__, addr, value);
2684 #endif
2685 subpage_writelen(opaque, addr, value, 0);
2686 }
2687
2688 static uint32_t subpage_readw (void *opaque, target_phys_addr_t addr)
2689 {
2690 #if defined(DEBUG_SUBPAGE)
2691 printf("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
2692 #endif
2693
2694 return subpage_readlen(opaque, addr, 1);
2695 }
2696
2697 static void subpage_writew (void *opaque, target_phys_addr_t addr,
2698 uint32_t value)
2699 {
2700 #if defined(DEBUG_SUBPAGE)
2701 printf("%s: addr " TARGET_FMT_plx " val %08x\n", __func__, addr, value);
2702 #endif
2703 subpage_writelen(opaque, addr, value, 1);
2704 }
2705
2706 static uint32_t subpage_readl (void *opaque, target_phys_addr_t addr)
2707 {
2708 #if defined(DEBUG_SUBPAGE)
2709 printf("%s: addr " TARGET_FMT_plx "\n", __func__, addr);
2710 #endif
2711
2712 return subpage_readlen(opaque, addr, 2);
2713 }
2714
2715 static void subpage_writel (void *opaque,
2716 target_phys_addr_t addr, uint32_t value)
2717 {
2718 #if defined(DEBUG_SUBPAGE)
2719 printf("%s: addr " TARGET_FMT_plx " val %08x\n", __func__, addr, value);
2720 #endif
2721 subpage_writelen(opaque, addr, value, 2);
2722 }
2723
2724 static CPUReadMemoryFunc *subpage_read[] = {
2725 &subpage_readb,
2726 &subpage_readw,
2727 &subpage_readl,
2728 };
2729
2730 static CPUWriteMemoryFunc *subpage_write[] = {
2731 &subpage_writeb,
2732 &subpage_writew,
2733 &subpage_writel,
2734 };
2735
2736 static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
2737 ram_addr_t memory, ram_addr_t region_offset)
2738 {
2739 int idx, eidx;
2740 unsigned int i;
2741
2742 if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE)
2743 return -1;
2744 idx = SUBPAGE_IDX(start);
2745 eidx = SUBPAGE_IDX(end);
2746 #if defined(DEBUG_SUBPAGE)
2747 printf("%s: %p start %08x end %08x idx %08x eidx %08x mem %d\n", __func__,
2748 mmio, start, end, idx, eidx, memory);
2749 #endif
2750 memory >>= IO_MEM_SHIFT;
2751 for (; idx <= eidx; idx++) {
2752 for (i = 0; i < 4; i++) {
2753 if (io_mem_read[memory][i]) {
2754 mmio->mem_read[idx][i] = &io_mem_read[memory][i];
2755 mmio->opaque[idx][0][i] = io_mem_opaque[memory];
2756 mmio->region_offset[idx][0][i] = region_offset;
2757 }
2758 if (io_mem_write[memory][i]) {
2759 mmio->mem_write[idx][i] = &io_mem_write[memory][i];
2760 mmio->opaque[idx][1][i] = io_mem_opaque[memory];
2761 mmio->region_offset[idx][1][i] = region_offset;
2762 }
2763 }
2764 }
2765
2766 return 0;
2767 }
2768
2769 static void *subpage_init (target_phys_addr_t base, ram_addr_t *phys,
2770 ram_addr_t orig_memory, ram_addr_t region_offset)
2771 {
2772 subpage_t *mmio;
2773 int subpage_memory;
2774
2775 mmio = qemu_mallocz(sizeof(subpage_t));
2776 if (mmio != NULL) {
2777 mmio->base = base;
2778 subpage_memory = cpu_register_io_memory(0, subpage_read, subpage_write, mmio);
2779 #if defined(DEBUG_SUBPAGE)
2780 printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__,
2781 mmio, base, TARGET_PAGE_SIZE, subpage_memory);
2782 #endif
2783 *phys = subpage_memory | IO_MEM_SUBPAGE;
2784 subpage_register(mmio, 0, TARGET_PAGE_SIZE - 1, orig_memory,
2785 region_offset);
2786 }
2787
2788 return mmio;
2789 }
2790
2791 static void io_mem_init(void)
2792 {
2793 cpu_register_io_memory(IO_MEM_ROM >> IO_MEM_SHIFT, error_mem_read, unassigned_mem_write, NULL);
2794 cpu_register_io_memory(IO_MEM_UNASSIGNED >> IO_MEM_SHIFT, unassigned_mem_read, unassigned_mem_write, NULL);
2795 cpu_register_io_memory(IO_MEM_NOTDIRTY >> IO_MEM_SHIFT, error_mem_read, notdirty_mem_write, NULL);
2796 io_mem_nb = 5;
2797
2798 io_mem_watch = cpu_register_io_memory(0, watch_mem_read,
2799 watch_mem_write, NULL);
2800 /* alloc dirty bits array */
2801 phys_ram_dirty = qemu_vmalloc(phys_ram_size >> TARGET_PAGE_BITS);
2802 memset(phys_ram_dirty, 0xff, phys_ram_size >> TARGET_PAGE_BITS);
2803 }
2804
2805 /* mem_read and mem_write are arrays of functions containing the
2806 function to access byte (index 0), word (index 1) and dword (index
2807 2). Functions can be omitted with a NULL function pointer. The
2808 registered functions may be modified dynamically later.
2809 If io_index is non zero, the corresponding io zone is
2810 modified. If it is zero, a new io zone is allocated. The return
2811 value can be used with cpu_register_physical_memory(). (-1) is
2812 returned if error. */
2813 int cpu_register_io_memory(int io_index,
2814 CPUReadMemoryFunc **mem_read,
2815 CPUWriteMemoryFunc **mem_write,
2816 void *opaque)
2817 {
2818 int i, subwidth = 0;
2819
2820 if (io_index <= 0) {
2821 if (io_mem_nb >= IO_MEM_NB_ENTRIES)
2822 return -1;
2823 io_index = io_mem_nb++;
2824 } else {
2825 if (io_index >= IO_MEM_NB_ENTRIES)
2826 return -1;
2827 }
2828
2829 for(i = 0;i < 3; i++) {
2830 if (!mem_read[i] || !mem_write[i])
2831 subwidth = IO_MEM_SUBWIDTH;
2832 io_mem_read[io_index][i] = mem_read[i];
2833 io_mem_write[io_index][i] = mem_write[i];
2834 }
2835 io_mem_opaque[io_index] = opaque;
2836 return (io_index << IO_MEM_SHIFT) | subwidth;
2837 }
2838
2839 CPUWriteMemoryFunc **cpu_get_io_memory_write(int io_index)
2840 {
2841 return io_mem_write[io_index >> IO_MEM_SHIFT];
2842 }
2843
2844 CPUReadMemoryFunc **cpu_get_io_memory_read(int io_index)
2845 {
2846 return io_mem_read[io_index >> IO_MEM_SHIFT];
2847 }
2848
2849 #endif /* !defined(CONFIG_USER_ONLY) */
2850
2851 /* physical memory access (slow version, mainly for debug) */
2852 #if defined(CONFIG_USER_ONLY)
2853 void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
2854 int len, int is_write)
2855 {
2856 int l, flags;
2857 target_ulong page;
2858 void * p;
2859
2860 while (len > 0) {
2861 page = addr & TARGET_PAGE_MASK;
2862 l = (page + TARGET_PAGE_SIZE) - addr;
2863 if (l > len)
2864 l = len;
2865 flags = page_get_flags(page);
2866 if (!(flags & PAGE_VALID))
2867 return;
2868 if (is_write) {
2869 if (!(flags & PAGE_WRITE))
2870 return;
2871 /* XXX: this code should not depend on lock_user */
2872 if (!(p = lock_user(VERIFY_WRITE, addr, l, 0)))
2873 /* FIXME - should this return an error rather than just fail? */
2874 return;
2875 memcpy(p, buf, l);
2876 unlock_user(p, addr, l);
2877 } else {
2878 if (!(flags & PAGE_READ))
2879 return;
2880 /* XXX: this code should not depend on lock_user */
2881 if (!(p = lock_user(VERIFY_READ, addr, l, 1)))
2882 /* FIXME - should this return an error rather than just fail? */
2883 return;
2884 memcpy(buf, p, l);
2885 unlock_user(p, addr, 0);
2886 }
2887 len -= l;
2888 buf += l;
2889 addr += l;
2890 }
2891 }
2892
2893 #else
2894 void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
2895 int len, int is_write)
2896 {
2897 int l, io_index;
2898 uint8_t *ptr;
2899 uint32_t val;
2900 target_phys_addr_t page;
2901 unsigned long pd;
2902 PhysPageDesc *p;
2903
2904 while (len > 0) {
2905 page = addr & TARGET_PAGE_MASK;
2906 l = (page + TARGET_PAGE_SIZE) - addr;
2907 if (l > len)
2908 l = len;
2909 p = phys_page_find(page >> TARGET_PAGE_BITS);
2910 if (!p) {
2911 pd = IO_MEM_UNASSIGNED;
2912 } else {
2913 pd = p->phys_offset;
2914 }
2915
2916 if (is_write) {
2917 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
2918 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
2919 if (p)
2920 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
2921 /* XXX: could force cpu_single_env to NULL to avoid
2922 potential bugs */
2923 if (l >= 4 && ((addr & 3) == 0)) {
2924 /* 32 bit write access */
2925 val = ldl_p(buf);
2926 io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
2927 l = 4;
2928 } else if (l >= 2 && ((addr & 1) == 0)) {
2929 /* 16 bit write access */
2930 val = lduw_p(buf);
2931 io_mem_write[io_index][1](io_mem_opaque[io_index], addr, val);
2932 l = 2;
2933 } else {
2934 /* 8 bit write access */
2935 val = ldub_p(buf);
2936 io_mem_write[io_index][0](io_mem_opaque[io_index], addr, val);
2937 l = 1;
2938 }
2939 } else {
2940 unsigned long addr1;
2941 addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
2942 /* RAM case */
2943 ptr = phys_ram_base + addr1;
2944 memcpy(ptr, buf, l);
2945 if (!cpu_physical_memory_is_dirty(addr1)) {
2946 /* invalidate code */
2947 tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
2948 /* set dirty bit */
2949 phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |=
2950 (0xff & ~CODE_DIRTY_FLAG);
2951 }
2952 }
2953 } else {
2954 if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
2955 !(pd & IO_MEM_ROMD)) {
2956 /* I/O case */
2957 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
2958 if (p)
2959 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
2960 if (l >= 4 && ((addr & 3) == 0)) {
2961 /* 32 bit read access */
2962 val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
2963 stl_p(buf, val);
2964 l = 4;
2965 } else if (l >= 2 && ((addr & 1) == 0)) {
2966 /* 16 bit read access */
2967 val = io_mem_read[io_index][1](io_mem_opaque[io_index], addr);
2968 stw_p(buf, val);
2969 l = 2;
2970 } else {
2971 /* 8 bit read access */
2972 val = io_mem_read[io_index][0](io_mem_opaque[io_index], addr);
2973 stb_p(buf, val);
2974 l = 1;
2975 }
2976 } else {
2977 /* RAM case */
2978 ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) +
2979 (addr & ~TARGET_PAGE_MASK);
2980 memcpy(buf, ptr, l);
2981 }
2982 }
2983 len -= l;
2984 buf += l;
2985 addr += l;
2986 }
2987 }
2988
2989 /* used for ROM loading : can write in RAM and ROM */
2990 void cpu_physical_memory_write_rom(target_phys_addr_t addr,
2991 const uint8_t *buf, int len)
2992 {
2993 int l;
2994 uint8_t *ptr;
2995 target_phys_addr_t page;
2996 unsigned long pd;
2997 PhysPageDesc *p;
2998
2999 while (len > 0) {
3000 page = addr & TARGET_PAGE_MASK;
3001 l = (page + TARGET_PAGE_SIZE) - addr;
3002 if (l > len)
3003 l = len;
3004 p = phys_page_find(page >> TARGET_PAGE_BITS);
3005 if (!p) {
3006 pd = IO_MEM_UNASSIGNED;
3007 } else {
3008 pd = p->phys_offset;
3009 }
3010
3011 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM &&
3012 (pd & ~TARGET_PAGE_MASK) != IO_MEM_ROM &&
3013 !(pd & IO_MEM_ROMD)) {
3014 /* do nothing */
3015 } else {
3016 unsigned long addr1;
3017 addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
3018 /* ROM/RAM case */
3019 ptr = phys_ram_base + addr1;
3020 memcpy(ptr, buf, l);
3021 }
3022 len -= l;
3023 buf += l;
3024 addr += l;
3025 }
3026 }
3027
3028
3029 /* warning: addr must be aligned */
3030 uint32_t ldl_phys(target_phys_addr_t addr)
3031 {
3032 int io_index;
3033 uint8_t *ptr;
3034 uint32_t val;
3035 unsigned long pd;
3036 PhysPageDesc *p;
3037
3038 p = phys_page_find(addr >> TARGET_PAGE_BITS);
3039 if (!p) {
3040 pd = IO_MEM_UNASSIGNED;
3041 } else {
3042 pd = p->phys_offset;
3043 }
3044
3045 if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
3046 !(pd & IO_MEM_ROMD)) {
3047 /* I/O case */
3048 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
3049 if (p)
3050 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
3051 val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
3052 } else {
3053 /* RAM case */
3054 ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) +
3055 (addr & ~TARGET_PAGE_MASK);
3056 val = ldl_p(ptr);
3057 }
3058 return val;
3059 }
3060
3061 /* warning: addr must be aligned */
3062 uint64_t ldq_phys(target_phys_addr_t addr)
3063 {
3064 int io_index;
3065 uint8_t *ptr;
3066 uint64_t val;
3067 unsigned long pd;
3068 PhysPageDesc *p;
3069
3070 p = phys_page_find(addr >> TARGET_PAGE_BITS);
3071 if (!p) {
3072 pd = IO_MEM_UNASSIGNED;
3073 } else {
3074 pd = p->phys_offset;
3075 }
3076
3077 if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
3078 !(pd & IO_MEM_ROMD)) {
3079 /* I/O case */
3080 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
3081 if (p)
3082 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
3083 #ifdef TARGET_WORDS_BIGENDIAN
3084 val = (uint64_t)io_mem_read[io_index][2](io_mem_opaque[io_index], addr) << 32;
3085 val |= io_mem_read[io_index][2](io_mem_opaque[io_index], addr + 4);
3086 #else
3087 val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
3088 val |= (uint64_t)io_mem_read[io_index][2](io_mem_opaque[io_index], addr + 4) << 32;
3089 #endif
3090 } else {
3091 /* RAM case */
3092 ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) +
3093 (addr & ~TARGET_PAGE_MASK);
3094 val = ldq_p(ptr);
3095 }
3096 return val;
3097 }
3098
3099 /* XXX: optimize */
3100 uint32_t ldub_phys(target_phys_addr_t addr)
3101 {
3102 uint8_t val;
3103 cpu_physical_memory_read(addr, &val, 1);
3104 return val;
3105 }
3106
3107 /* XXX: optimize */
3108 uint32_t lduw_phys(target_phys_addr_t addr)
3109 {
3110 uint16_t val;
3111 cpu_physical_memory_read(addr, (uint8_t *)&val, 2);
3112 return tswap16(val);
3113 }
3114
3115 /* warning: addr must be aligned. The ram page is not masked as dirty
3116 and the code inside is not invalidated. It is useful if the dirty
3117 bits are used to track modified PTEs */
3118 void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
3119 {
3120 int io_index;
3121 uint8_t *ptr;
3122 unsigned long pd;
3123 PhysPageDesc *p;
3124
3125 p = phys_page_find(addr >> TARGET_PAGE_BITS);
3126 if (!p) {
3127 pd = IO_MEM_UNASSIGNED;
3128 } else {
3129 pd = p->phys_offset;
3130 }
3131
3132 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
3133 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
3134 if (p)
3135 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
3136 io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
3137 } else {
3138 unsigned long addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
3139 ptr = phys_ram_base + addr1;
3140 stl_p(ptr, val);
3141
3142 if (unlikely(in_migration)) {
3143 if (!cpu_physical_memory_is_dirty(addr1)) {
3144 /* invalidate code */
3145 tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
3146 /* set dirty bit */
3147 phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |=
3148 (0xff & ~CODE_DIRTY_FLAG);
3149 }
3150 }
3151 }
3152 }
3153
3154 void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val)
3155 {
3156 int io_index;
3157 uint8_t *ptr;
3158 unsigned long pd;
3159 PhysPageDesc *p;
3160
3161 p = phys_page_find(addr >> TARGET_PAGE_BITS);
3162 if (!p) {
3163 pd = IO_MEM_UNASSIGNED;
3164 } else {
3165 pd = p->phys_offset;
3166 }
3167
3168 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
3169 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
3170 if (p)
3171 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
3172 #ifdef TARGET_WORDS_BIGENDIAN
3173 io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val >> 32);
3174 io_mem_write[io_index][2](io_mem_opaque[io_index], addr + 4, val);
3175 #else
3176 io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
3177 io_mem_write[io_index][2](io_mem_opaque[io_index], addr + 4, val >> 32);
3178 #endif
3179 } else {
3180 ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) +
3181 (addr & ~TARGET_PAGE_MASK);
3182 stq_p(ptr, val);
3183 }
3184 }
3185
3186 /* warning: addr must be aligned */
3187 void stl_phys(target_phys_addr_t addr, uint32_t val)
3188 {
3189 int io_index;
3190 uint8_t *ptr;
3191 unsigned long pd;
3192 PhysPageDesc *p;
3193
3194 p = phys_page_find(addr >> TARGET_PAGE_BITS);
3195 if (!p) {
3196 pd = IO_MEM_UNASSIGNED;
3197 } else {
3198 pd = p->phys_offset;
3199 }
3200
3201 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
3202 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
3203 if (p)
3204 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
3205 io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
3206 } else {
3207 unsigned long addr1;
3208 addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
3209 /* RAM case */
3210 ptr = phys_ram_base + addr1;
3211 stl_p(ptr, val);
3212 if (!cpu_physical_memory_is_dirty(addr1)) {
3213 /* invalidate code */
3214 tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
3215 /* set dirty bit */
3216 phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |=
3217 (0xff & ~CODE_DIRTY_FLAG);
3218 }
3219 }
3220 }
3221
3222 /* XXX: optimize */
3223 void stb_phys(target_phys_addr_t addr, uint32_t val)
3224 {
3225 uint8_t v = val;
3226 cpu_physical_memory_write(addr, &v, 1);
3227 }
3228
3229 /* XXX: optimize */
3230 void stw_phys(target_phys_addr_t addr, uint32_t val)
3231 {
3232 uint16_t v = tswap16(val);
3233 cpu_physical_memory_write(addr, (const uint8_t *)&v, 2);
3234 }
3235
3236 /* XXX: optimize */
3237 void stq_phys(target_phys_addr_t addr, uint64_t val)
3238 {
3239 val = tswap64(val);
3240 cpu_physical_memory_write(addr, (const uint8_t *)&val, 8);
3241 }
3242
3243 #endif
3244
3245 /* virtual memory access for debug */
3246 int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
3247 uint8_t *buf, int len, int is_write)
3248 {
3249 int l;
3250 target_phys_addr_t phys_addr;
3251 target_ulong page;
3252
3253 while (len > 0) {
3254 page = addr & TARGET_PAGE_MASK;
3255 phys_addr = cpu_get_phys_page_debug(env, page);
3256 /* if no physical page mapped, return an error */
3257 if (phys_addr == -1)
3258 return -1;
3259 l = (page + TARGET_PAGE_SIZE) - addr;
3260 if (l > len)
3261 l = len;
3262 cpu_physical_memory_rw(phys_addr + (addr & ~TARGET_PAGE_MASK),
3263 buf, l, is_write);
3264 len -= l;
3265 buf += l;
3266 addr += l;
3267 }
3268 return 0;
3269 }
3270
3271 /* in deterministic execution mode, instructions doing device I/Os
3272 must be at the end of the TB */
3273 void cpu_io_recompile(CPUState *env, void *retaddr)
3274 {
3275 TranslationBlock *tb;
3276 uint32_t n, cflags;
3277 target_ulong pc, cs_base;
3278 uint64_t flags;
3279
3280 tb = tb_find_pc((unsigned long)retaddr);
3281 if (!tb) {
3282 cpu_abort(env, "cpu_io_recompile: could not find TB for pc=%p",
3283 retaddr);
3284 }
3285 n = env->icount_decr.u16.low + tb->icount;
3286 cpu_restore_state(tb, env, (unsigned long)retaddr, NULL);
3287 /* Calculate how many instructions had been executed before the fault
3288 occurred. */
3289 n = n - env->icount_decr.u16.low;
3290 /* Generate a new TB ending on the I/O insn. */
3291 n++;
3292 /* On MIPS and SH, delay slot instructions can only be restarted if
3293 they were already the first instruction in the TB. If this is not
3294 the first instruction in a TB then re-execute the preceding
3295 branch. */
3296 #if defined(TARGET_MIPS)
3297 if ((env->hflags & MIPS_HFLAG_BMASK) != 0 && n > 1) {
3298 env->active_tc.PC -= 4;
3299 env->icount_decr.u16.low++;
3300 env->hflags &= ~MIPS_HFLAG_BMASK;
3301 }
3302 #elif defined(TARGET_SH4)
3303 if ((env->flags & ((DELAY_SLOT | DELAY_SLOT_CONDITIONAL))) != 0
3304 && n > 1) {
3305 env->pc -= 2;
3306 env->icount_decr.u16.low++;
3307 env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL);
3308 }
3309 #endif
3310 /* This should never happen. */
3311 if (n > CF_COUNT_MASK)
3312 cpu_abort(env, "TB too big during recompile");
3313
3314 cflags = n | CF_LAST_IO;
3315 pc = tb->pc;
3316 cs_base = tb->cs_base;
3317 flags = tb->flags;
3318 tb_phys_invalidate(tb, -1);
3319 /* FIXME: In theory this could raise an exception. In practice
3320 we have already translated the block once so it's probably ok. */
3321 tb_gen_code(env, pc, cs_base, flags, cflags);
3322 /* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not
3323 the first in the TB) then we end up generating a whole new TB and
3324 repeating the fault, which is horribly inefficient.
3325 Better would be to execute just this insn uncached, or generate a
3326 second new TB. */
3327 cpu_resume_from_signal(env, NULL);
3328 }
3329
3330 void dump_exec_info(FILE *f,
3331 int (*cpu_fprintf)(FILE *f, const char *fmt, ...))
3332 {
3333 int i, target_code_size, max_target_code_size;
3334 int direct_jmp_count, direct_jmp2_count, cross_page;
3335 TranslationBlock *tb;
3336
3337 target_code_size = 0;
3338 max_target_code_size = 0;
3339 cross_page = 0;
3340 direct_jmp_count = 0;
3341 direct_jmp2_count = 0;
3342 for(i = 0; i < nb_tbs; i++) {
3343 tb = &tbs[i];
3344 target_code_size += tb->size;
3345 if (tb->size > max_target_code_size)
3346 max_target_code_size = tb->size;
3347 if (tb->page_addr[1] != -1)
3348 cross_page++;
3349 if (tb->tb_next_offset[0] != 0xffff) {
3350 direct_jmp_count++;
3351 if (tb->tb_next_offset[1] != 0xffff) {
3352 direct_jmp2_count++;
3353 }
3354 }
3355 }
3356 /* XXX: avoid using doubles ? */
3357 cpu_fprintf(f, "Translation buffer state:\n");
3358 cpu_fprintf(f, "gen code size %ld/%ld\n",
3359 code_gen_ptr - code_gen_buffer, code_gen_buffer_max_size);
3360 cpu_fprintf(f, "TB count %d/%d\n",
3361 nb_tbs, code_gen_max_blocks);
3362 cpu_fprintf(f, "TB avg target size %d max=%d bytes\n",
3363 nb_tbs ? target_code_size / nb_tbs : 0,
3364 max_target_code_size);
3365 cpu_fprintf(f, "TB avg host size %d bytes (expansion ratio: %0.1f)\n",
3366 nb_tbs ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0,
3367 target_code_size ? (double) (code_gen_ptr - code_gen_buffer) / target_code_size : 0);
3368 cpu_fprintf(f, "cross page TB count %d (%d%%)\n",
3369 cross_page,
3370 nb_tbs ? (cross_page * 100) / nb_tbs : 0);
3371 cpu_fprintf(f, "direct jump count %d (%d%%) (2 jumps=%d %d%%)\n",
3372 direct_jmp_count,
3373 nb_tbs ? (direct_jmp_count * 100) / nb_tbs : 0,
3374 direct_jmp2_count,
3375 nb_tbs ? (direct_jmp2_count * 100) / nb_tbs : 0);
3376 cpu_fprintf(f, "\nStatistics:\n");
3377 cpu_fprintf(f, "TB flush count %d\n", tb_flush_count);
3378 cpu_fprintf(f, "TB invalidate count %d\n", tb_phys_invalidate_count);
3379 cpu_fprintf(f, "TLB flush count %d\n", tlb_flush_count);
3380 tcg_dump_info(f, cpu_fprintf);
3381 }
3382
3383 #if !defined(CONFIG_USER_ONLY)
3384
3385 #define MMUSUFFIX _cmmu
3386 #define GETPC() NULL
3387 #define env cpu_single_env
3388 #define SOFTMMU_CODE_ACCESS
3389
3390 #define SHIFT 0
3391 #include "softmmu_template.h"
3392
3393 #define SHIFT 1
3394 #include "softmmu_template.h"
3395
3396 #define SHIFT 2
3397 #include "softmmu_template.h"
3398
3399 #define SHIFT 3
3400 #include "softmmu_template.h"
3401
3402 #undef env
3403
3404 #endif
jz4740 based target emulation