2 * virtual page mapping and translated block handling
4 * Copyright (c) 2003 Fabrice Bellard
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.
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.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
23 #include <sys/types.h>
27 #include "qemu-common.h"
35 #include "qemu-timer.h"
37 #include "exec-memory.h"
38 #if defined(CONFIG_USER_ONLY)
40 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
41 #include <sys/param.h>
42 #if __FreeBSD_version >= 700104
43 #define HAVE_KINFO_GETVMMAP
44 #define sigqueue sigqueue_freebsd /* avoid redefinition */
47 #include <machine/profile.h>
55 #else /* !CONFIG_USER_ONLY */
56 #include "xen-mapcache.h"
60 //#define DEBUG_TB_INVALIDATE
63 //#define DEBUG_UNASSIGNED
65 /* make various TB consistency checks */
66 //#define DEBUG_TB_CHECK
67 //#define DEBUG_TLB_CHECK
69 //#define DEBUG_IOPORT
70 //#define DEBUG_SUBPAGE
72 #if !defined(CONFIG_USER_ONLY)
73 /* TB consistency checks only implemented for usermode emulation. */
77 #define SMC_BITMAP_USE_THRESHOLD 10
79 static TranslationBlock *tbs;
80 static int code_gen_max_blocks;
81 TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
83 /* any access to the tbs or the page table must use this lock */
84 spinlock_t tb_lock = SPIN_LOCK_UNLOCKED;
86 #if defined(__arm__) || defined(__sparc_v9__)
87 /* The prologue must be reachable with a direct jump. ARM and Sparc64
88 have limited branch ranges (possibly also PPC) so place it in a
89 section close to code segment. */
90 #define code_gen_section \
91 __attribute__((__section__(".gen_code"))) \
92 __attribute__((aligned (32)))
94 /* Maximum alignment for Win32 is 16. */
95 #define code_gen_section \
96 __attribute__((aligned (16)))
98 #define code_gen_section \
99 __attribute__((aligned (32)))
102 uint8_t code_gen_prologue[1024] code_gen_section;
103 static uint8_t *code_gen_buffer;
104 static unsigned long code_gen_buffer_size;
105 /* threshold to flush the translated code buffer */
106 static unsigned long code_gen_buffer_max_size;
107 static uint8_t *code_gen_ptr;
109 #if !defined(CONFIG_USER_ONLY)
111 static int in_migration;
113 RAMList ram_list = { .blocks = QLIST_HEAD_INITIALIZER(ram_list.blocks) };
115 static MemoryRegion *system_memory;
116 static MemoryRegion *system_io;
121 /* current CPU in the current thread. It is only valid inside
123 CPUState *cpu_single_env;
124 /* 0 = Do not count executed instructions.
125 1 = Precise instruction counting.
126 2 = Adaptive rate instruction counting. */
129 typedef struct PageDesc {
130 /* list of TBs intersecting this ram page */
131 TranslationBlock *first_tb;
132 /* in order to optimize self modifying code, we count the number
133 of lookups we do to a given page to use a bitmap */
134 unsigned int code_write_count;
135 uint8_t *code_bitmap;
136 #if defined(CONFIG_USER_ONLY)
141 /* In system mode we want L1_MAP to be based on ram offsets,
142 while in user mode we want it to be based on virtual addresses. */
143 #if !defined(CONFIG_USER_ONLY)
144 #if HOST_LONG_BITS < TARGET_PHYS_ADDR_SPACE_BITS
145 # define L1_MAP_ADDR_SPACE_BITS HOST_LONG_BITS
147 # define L1_MAP_ADDR_SPACE_BITS TARGET_PHYS_ADDR_SPACE_BITS
150 # define L1_MAP_ADDR_SPACE_BITS TARGET_VIRT_ADDR_SPACE_BITS
153 /* Size of the L2 (and L3, etc) page tables. */
155 #define L2_SIZE (1 << L2_BITS)
157 /* The bits remaining after N lower levels of page tables. */
158 #define P_L1_BITS_REM \
159 ((TARGET_PHYS_ADDR_SPACE_BITS - TARGET_PAGE_BITS) % L2_BITS)
160 #define V_L1_BITS_REM \
161 ((L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS) % L2_BITS)
163 /* Size of the L1 page table. Avoid silly small sizes. */
164 #if P_L1_BITS_REM < 4
165 #define P_L1_BITS (P_L1_BITS_REM + L2_BITS)
167 #define P_L1_BITS P_L1_BITS_REM
170 #if V_L1_BITS_REM < 4
171 #define V_L1_BITS (V_L1_BITS_REM + L2_BITS)
173 #define V_L1_BITS V_L1_BITS_REM
176 #define P_L1_SIZE ((target_phys_addr_t)1 << P_L1_BITS)
177 #define V_L1_SIZE ((target_ulong)1 << V_L1_BITS)
179 #define P_L1_SHIFT (TARGET_PHYS_ADDR_SPACE_BITS - TARGET_PAGE_BITS - P_L1_BITS)
180 #define V_L1_SHIFT (L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS - V_L1_BITS)
182 unsigned long qemu_real_host_page_size;
183 unsigned long qemu_host_page_size;
184 unsigned long qemu_host_page_mask;
186 /* This is a multi-level map on the virtual address space.
187 The bottom level has pointers to PageDesc. */
188 static void *l1_map[V_L1_SIZE];
190 #if !defined(CONFIG_USER_ONLY)
191 typedef struct PhysPageDesc {
192 /* offset in host memory of the page + io_index in the low bits */
193 ram_addr_t phys_offset;
194 ram_addr_t region_offset;
197 /* This is a multi-level map on the physical address space.
198 The bottom level has pointers to PhysPageDesc. */
199 static void *l1_phys_map[P_L1_SIZE];
201 static void io_mem_init(void);
202 static void memory_map_init(void);
204 /* io memory support */
205 CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
206 CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
207 void *io_mem_opaque[IO_MEM_NB_ENTRIES];
208 static char io_mem_used[IO_MEM_NB_ENTRIES];
209 static int io_mem_watch;
214 static const char *logfilename = "qemu.log";
216 static const char *logfilename = "/tmp/qemu.log";
220 static int log_append = 0;
223 #if !defined(CONFIG_USER_ONLY)
224 static int tlb_flush_count;
226 static int tb_flush_count;
227 static int tb_phys_invalidate_count;
230 static void map_exec(void *addr, long size)
233 VirtualProtect(addr, size,
234 PAGE_EXECUTE_READWRITE, &old_protect);
238 static void map_exec(void *addr, long size)
240 unsigned long start, end, page_size;
242 page_size = getpagesize();
243 start = (unsigned long)addr;
244 start &= ~(page_size - 1);
246 end = (unsigned long)addr + size;
247 end += page_size - 1;
248 end &= ~(page_size - 1);
250 mprotect((void *)start, end - start,
251 PROT_READ | PROT_WRITE | PROT_EXEC);
255 static void page_init(void)
257 /* NOTE: we can always suppose that qemu_host_page_size >=
261 SYSTEM_INFO system_info;
263 GetSystemInfo(&system_info);
264 qemu_real_host_page_size = system_info.dwPageSize;
267 qemu_real_host_page_size = getpagesize();
269 if (qemu_host_page_size == 0)
270 qemu_host_page_size = qemu_real_host_page_size;
271 if (qemu_host_page_size < TARGET_PAGE_SIZE)
272 qemu_host_page_size = TARGET_PAGE_SIZE;
273 qemu_host_page_mask = ~(qemu_host_page_size - 1);
275 #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
277 #ifdef HAVE_KINFO_GETVMMAP
278 struct kinfo_vmentry *freep;
281 freep = kinfo_getvmmap(getpid(), &cnt);
284 for (i = 0; i < cnt; i++) {
285 unsigned long startaddr, endaddr;
287 startaddr = freep[i].kve_start;
288 endaddr = freep[i].kve_end;
289 if (h2g_valid(startaddr)) {
290 startaddr = h2g(startaddr) & TARGET_PAGE_MASK;
292 if (h2g_valid(endaddr)) {
293 endaddr = h2g(endaddr);
294 page_set_flags(startaddr, endaddr, PAGE_RESERVED);
296 #if TARGET_ABI_BITS <= L1_MAP_ADDR_SPACE_BITS
298 page_set_flags(startaddr, endaddr, PAGE_RESERVED);
309 last_brk = (unsigned long)sbrk(0);
311 f = fopen("/compat/linux/proc/self/maps", "r");
316 unsigned long startaddr, endaddr;
319 n = fscanf (f, "%lx-%lx %*[^\n]\n", &startaddr, &endaddr);
321 if (n == 2 && h2g_valid(startaddr)) {
322 startaddr = h2g(startaddr) & TARGET_PAGE_MASK;
324 if (h2g_valid(endaddr)) {
325 endaddr = h2g(endaddr);
329 page_set_flags(startaddr, endaddr, PAGE_RESERVED);
341 static PageDesc *page_find_alloc(tb_page_addr_t index, int alloc)
347 #if defined(CONFIG_USER_ONLY)
348 /* We can't use g_malloc because it may recurse into a locked mutex. */
349 # define ALLOC(P, SIZE) \
351 P = mmap(NULL, SIZE, PROT_READ | PROT_WRITE, \
352 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \
355 # define ALLOC(P, SIZE) \
356 do { P = g_malloc0(SIZE); } while (0)
359 /* Level 1. Always allocated. */
360 lp = l1_map + ((index >> V_L1_SHIFT) & (V_L1_SIZE - 1));
363 for (i = V_L1_SHIFT / L2_BITS - 1; i > 0; i--) {
370 ALLOC(p, sizeof(void *) * L2_SIZE);
374 lp = p + ((index >> (i * L2_BITS)) & (L2_SIZE - 1));
382 ALLOC(pd, sizeof(PageDesc) * L2_SIZE);
388 return pd + (index & (L2_SIZE - 1));
391 static inline PageDesc *page_find(tb_page_addr_t index)
393 return page_find_alloc(index, 0);
396 #if !defined(CONFIG_USER_ONLY)
397 static PhysPageDesc *phys_page_find_alloc(target_phys_addr_t index, int alloc)
403 /* Level 1. Always allocated. */
404 lp = l1_phys_map + ((index >> P_L1_SHIFT) & (P_L1_SIZE - 1));
407 for (i = P_L1_SHIFT / L2_BITS - 1; i > 0; i--) {
413 *lp = p = g_malloc0(sizeof(void *) * L2_SIZE);
415 lp = p + ((index >> (i * L2_BITS)) & (L2_SIZE - 1));
426 *lp = pd = g_malloc(sizeof(PhysPageDesc) * L2_SIZE);
428 for (i = 0; i < L2_SIZE; i++) {
429 pd[i].phys_offset = IO_MEM_UNASSIGNED;
430 pd[i].region_offset = (index + i) << TARGET_PAGE_BITS;
434 return pd + (index & (L2_SIZE - 1));
437 static inline PhysPageDesc *phys_page_find(target_phys_addr_t index)
439 return phys_page_find_alloc(index, 0);
442 static void tlb_protect_code(ram_addr_t ram_addr);
443 static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr,
445 #define mmap_lock() do { } while(0)
446 #define mmap_unlock() do { } while(0)
449 #define DEFAULT_CODE_GEN_BUFFER_SIZE (32 * 1024 * 1024)
451 #if defined(CONFIG_USER_ONLY)
452 /* Currently it is not recommended to allocate big chunks of data in
453 user mode. It will change when a dedicated libc will be used */
454 #define USE_STATIC_CODE_GEN_BUFFER
457 #ifdef USE_STATIC_CODE_GEN_BUFFER
458 static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE]
459 __attribute__((aligned (CODE_GEN_ALIGN)));
462 static void code_gen_alloc(unsigned long tb_size)
464 #ifdef USE_STATIC_CODE_GEN_BUFFER
465 code_gen_buffer = static_code_gen_buffer;
466 code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE;
467 map_exec(code_gen_buffer, code_gen_buffer_size);
469 code_gen_buffer_size = tb_size;
470 if (code_gen_buffer_size == 0) {
471 #if defined(CONFIG_USER_ONLY)
472 code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE;
474 /* XXX: needs adjustments */
475 code_gen_buffer_size = (unsigned long)(ram_size / 4);
478 if (code_gen_buffer_size < MIN_CODE_GEN_BUFFER_SIZE)
479 code_gen_buffer_size = MIN_CODE_GEN_BUFFER_SIZE;
480 /* The code gen buffer location may have constraints depending on
481 the host cpu and OS */
482 #if defined(__linux__)
487 flags = MAP_PRIVATE | MAP_ANONYMOUS;
488 #if defined(__x86_64__)
490 /* Cannot map more than that */
491 if (code_gen_buffer_size > (800 * 1024 * 1024))
492 code_gen_buffer_size = (800 * 1024 * 1024);
493 #elif defined(__sparc_v9__)
494 // Map the buffer below 2G, so we can use direct calls and branches
496 start = (void *) 0x60000000UL;
497 if (code_gen_buffer_size > (512 * 1024 * 1024))
498 code_gen_buffer_size = (512 * 1024 * 1024);
499 #elif defined(__arm__)
500 /* Map the buffer below 32M, so we can use direct calls and branches */
502 start = (void *) 0x01000000UL;
503 if (code_gen_buffer_size > 16 * 1024 * 1024)
504 code_gen_buffer_size = 16 * 1024 * 1024;
505 #elif defined(__s390x__)
506 /* Map the buffer so that we can use direct calls and branches. */
507 /* We have a +- 4GB range on the branches; leave some slop. */
508 if (code_gen_buffer_size > (3ul * 1024 * 1024 * 1024)) {
509 code_gen_buffer_size = 3ul * 1024 * 1024 * 1024;
511 start = (void *)0x90000000UL;
513 code_gen_buffer = mmap(start, code_gen_buffer_size,
514 PROT_WRITE | PROT_READ | PROT_EXEC,
516 if (code_gen_buffer == MAP_FAILED) {
517 fprintf(stderr, "Could not allocate dynamic translator buffer\n");
521 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) \
522 || defined(__DragonFly__) || defined(__OpenBSD__) \
523 || defined(__NetBSD__)
527 flags = MAP_PRIVATE | MAP_ANONYMOUS;
528 #if defined(__x86_64__)
529 /* FreeBSD doesn't have MAP_32BIT, use MAP_FIXED and assume
530 * 0x40000000 is free */
532 addr = (void *)0x40000000;
533 /* Cannot map more than that */
534 if (code_gen_buffer_size > (800 * 1024 * 1024))
535 code_gen_buffer_size = (800 * 1024 * 1024);
536 #elif defined(__sparc_v9__)
537 // Map the buffer below 2G, so we can use direct calls and branches
539 addr = (void *) 0x60000000UL;
540 if (code_gen_buffer_size > (512 * 1024 * 1024)) {
541 code_gen_buffer_size = (512 * 1024 * 1024);
544 code_gen_buffer = mmap(addr, code_gen_buffer_size,
545 PROT_WRITE | PROT_READ | PROT_EXEC,
547 if (code_gen_buffer == MAP_FAILED) {
548 fprintf(stderr, "Could not allocate dynamic translator buffer\n");
553 code_gen_buffer = g_malloc(code_gen_buffer_size);
554 map_exec(code_gen_buffer, code_gen_buffer_size);
556 #endif /* !USE_STATIC_CODE_GEN_BUFFER */
557 map_exec(code_gen_prologue, sizeof(code_gen_prologue));
558 code_gen_buffer_max_size = code_gen_buffer_size -
559 (TCG_MAX_OP_SIZE * OPC_BUF_SIZE);
560 code_gen_max_blocks = code_gen_buffer_size / CODE_GEN_AVG_BLOCK_SIZE;
561 tbs = g_malloc(code_gen_max_blocks * sizeof(TranslationBlock));
564 /* Must be called before using the QEMU cpus. 'tb_size' is the size
565 (in bytes) allocated to the translation buffer. Zero means default
567 void tcg_exec_init(unsigned long tb_size)
570 code_gen_alloc(tb_size);
571 code_gen_ptr = code_gen_buffer;
573 #if !defined(CONFIG_USER_ONLY) || !defined(CONFIG_USE_GUEST_BASE)
574 /* There's no guest base to take into account, so go ahead and
575 initialize the prologue now. */
576 tcg_prologue_init(&tcg_ctx);
580 bool tcg_enabled(void)
582 return code_gen_buffer != NULL;
585 void cpu_exec_init_all(void)
587 #if !defined(CONFIG_USER_ONLY)
593 #if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
595 static int cpu_common_post_load(void *opaque, int version_id)
597 CPUState *env = opaque;
599 /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
600 version_id is increased. */
601 env->interrupt_request &= ~0x01;
607 static const VMStateDescription vmstate_cpu_common = {
608 .name = "cpu_common",
610 .minimum_version_id = 1,
611 .minimum_version_id_old = 1,
612 .post_load = cpu_common_post_load,
613 .fields = (VMStateField []) {
614 VMSTATE_UINT32(halted, CPUState),
615 VMSTATE_UINT32(interrupt_request, CPUState),
616 VMSTATE_END_OF_LIST()
621 CPUState *qemu_get_cpu(int cpu)
623 CPUState *env = first_cpu;
626 if (env->cpu_index == cpu)
634 void cpu_exec_init(CPUState *env)
639 #if defined(CONFIG_USER_ONLY)
642 env->next_cpu = NULL;
645 while (*penv != NULL) {
646 penv = &(*penv)->next_cpu;
649 env->cpu_index = cpu_index;
651 QTAILQ_INIT(&env->breakpoints);
652 QTAILQ_INIT(&env->watchpoints);
653 #ifndef CONFIG_USER_ONLY
654 env->thread_id = qemu_get_thread_id();
657 #if defined(CONFIG_USER_ONLY)
660 #if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
661 vmstate_register(NULL, cpu_index, &vmstate_cpu_common, env);
662 register_savevm(NULL, "cpu", cpu_index, CPU_SAVE_VERSION,
663 cpu_save, cpu_load, env);
667 /* Allocate a new translation block. Flush the translation buffer if
668 too many translation blocks or too much generated code. */
669 static TranslationBlock *tb_alloc(target_ulong pc)
671 TranslationBlock *tb;
673 if (nb_tbs >= code_gen_max_blocks ||
674 (code_gen_ptr - code_gen_buffer) >= code_gen_buffer_max_size)
682 void tb_free(TranslationBlock *tb)
684 /* In practice this is mostly used for single use temporary TB
685 Ignore the hard cases and just back up if this TB happens to
686 be the last one generated. */
687 if (nb_tbs > 0 && tb == &tbs[nb_tbs - 1]) {
688 code_gen_ptr = tb->tc_ptr;
693 static inline void invalidate_page_bitmap(PageDesc *p)
695 if (p->code_bitmap) {
696 g_free(p->code_bitmap);
697 p->code_bitmap = NULL;
699 p->code_write_count = 0;
702 /* Set to NULL all the 'first_tb' fields in all PageDescs. */
704 static void page_flush_tb_1 (int level, void **lp)
713 for (i = 0; i < L2_SIZE; ++i) {
714 pd[i].first_tb = NULL;
715 invalidate_page_bitmap(pd + i);
719 for (i = 0; i < L2_SIZE; ++i) {
720 page_flush_tb_1 (level - 1, pp + i);
725 static void page_flush_tb(void)
728 for (i = 0; i < V_L1_SIZE; i++) {
729 page_flush_tb_1(V_L1_SHIFT / L2_BITS - 1, l1_map + i);
733 /* flush all the translation blocks */
734 /* XXX: tb_flush is currently not thread safe */
735 void tb_flush(CPUState *env1)
738 #if defined(DEBUG_FLUSH)
739 printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n",
740 (unsigned long)(code_gen_ptr - code_gen_buffer),
742 ((unsigned long)(code_gen_ptr - code_gen_buffer)) / nb_tbs : 0);
744 if ((unsigned long)(code_gen_ptr - code_gen_buffer) > code_gen_buffer_size)
745 cpu_abort(env1, "Internal error: code buffer overflow\n");
749 for(env = first_cpu; env != NULL; env = env->next_cpu) {
750 memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *));
753 memset (tb_phys_hash, 0, CODE_GEN_PHYS_HASH_SIZE * sizeof (void *));
756 code_gen_ptr = code_gen_buffer;
757 /* XXX: flush processor icache at this point if cache flush is
762 #ifdef DEBUG_TB_CHECK
764 static void tb_invalidate_check(target_ulong address)
766 TranslationBlock *tb;
768 address &= TARGET_PAGE_MASK;
769 for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) {
770 for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) {
771 if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
772 address >= tb->pc + tb->size)) {
773 printf("ERROR invalidate: address=" TARGET_FMT_lx
774 " PC=%08lx size=%04x\n",
775 address, (long)tb->pc, tb->size);
781 /* verify that all the pages have correct rights for code */
782 static void tb_page_check(void)
784 TranslationBlock *tb;
785 int i, flags1, flags2;
787 for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) {
788 for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) {
789 flags1 = page_get_flags(tb->pc);
790 flags2 = page_get_flags(tb->pc + tb->size - 1);
791 if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
792 printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
793 (long)tb->pc, tb->size, flags1, flags2);
801 /* invalidate one TB */
802 static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb,
805 TranslationBlock *tb1;
809 *ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
812 ptb = (TranslationBlock **)((char *)tb1 + next_offset);
816 static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb)
818 TranslationBlock *tb1;
824 tb1 = (TranslationBlock *)((long)tb1 & ~3);
826 *ptb = tb1->page_next[n1];
829 ptb = &tb1->page_next[n1];
833 static inline void tb_jmp_remove(TranslationBlock *tb, int n)
835 TranslationBlock *tb1, **ptb;
838 ptb = &tb->jmp_next[n];
841 /* find tb(n) in circular list */
845 tb1 = (TranslationBlock *)((long)tb1 & ~3);
846 if (n1 == n && tb1 == tb)
849 ptb = &tb1->jmp_first;
851 ptb = &tb1->jmp_next[n1];
854 /* now we can suppress tb(n) from the list */
855 *ptb = tb->jmp_next[n];
857 tb->jmp_next[n] = NULL;
861 /* reset the jump entry 'n' of a TB so that it is not chained to
863 static inline void tb_reset_jump(TranslationBlock *tb, int n)
865 tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n]));
868 void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr)
873 tb_page_addr_t phys_pc;
874 TranslationBlock *tb1, *tb2;
876 /* remove the TB from the hash list */
877 phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
878 h = tb_phys_hash_func(phys_pc);
879 tb_remove(&tb_phys_hash[h], tb,
880 offsetof(TranslationBlock, phys_hash_next));
882 /* remove the TB from the page list */
883 if (tb->page_addr[0] != page_addr) {
884 p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
885 tb_page_remove(&p->first_tb, tb);
886 invalidate_page_bitmap(p);
888 if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) {
889 p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
890 tb_page_remove(&p->first_tb, tb);
891 invalidate_page_bitmap(p);
894 tb_invalidated_flag = 1;
896 /* remove the TB from the hash list */
897 h = tb_jmp_cache_hash_func(tb->pc);
898 for(env = first_cpu; env != NULL; env = env->next_cpu) {
899 if (env->tb_jmp_cache[h] == tb)
900 env->tb_jmp_cache[h] = NULL;
903 /* suppress this TB from the two jump lists */
904 tb_jmp_remove(tb, 0);
905 tb_jmp_remove(tb, 1);
907 /* suppress any remaining jumps to this TB */
913 tb1 = (TranslationBlock *)((long)tb1 & ~3);
914 tb2 = tb1->jmp_next[n1];
915 tb_reset_jump(tb1, n1);
916 tb1->jmp_next[n1] = NULL;
919 tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */
921 tb_phys_invalidate_count++;
924 static inline void set_bits(uint8_t *tab, int start, int len)
930 mask = 0xff << (start & 7);
931 if ((start & ~7) == (end & ~7)) {
933 mask &= ~(0xff << (end & 7));
938 start = (start + 8) & ~7;
940 while (start < end1) {
945 mask = ~(0xff << (end & 7));
951 static void build_page_bitmap(PageDesc *p)
953 int n, tb_start, tb_end;
954 TranslationBlock *tb;
956 p->code_bitmap = g_malloc0(TARGET_PAGE_SIZE / 8);
961 tb = (TranslationBlock *)((long)tb & ~3);
962 /* NOTE: this is subtle as a TB may span two physical pages */
964 /* NOTE: tb_end may be after the end of the page, but
965 it is not a problem */
966 tb_start = tb->pc & ~TARGET_PAGE_MASK;
967 tb_end = tb_start + tb->size;
968 if (tb_end > TARGET_PAGE_SIZE)
969 tb_end = TARGET_PAGE_SIZE;
972 tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK);
974 set_bits(p->code_bitmap, tb_start, tb_end - tb_start);
975 tb = tb->page_next[n];
979 TranslationBlock *tb_gen_code(CPUState *env,
980 target_ulong pc, target_ulong cs_base,
981 int flags, int cflags)
983 TranslationBlock *tb;
985 tb_page_addr_t phys_pc, phys_page2;
986 target_ulong virt_page2;
989 phys_pc = get_page_addr_code(env, pc);
992 /* flush must be done */
994 /* cannot fail at this point */
996 /* Don't forget to invalidate previous TB info. */
997 tb_invalidated_flag = 1;
999 tc_ptr = code_gen_ptr;
1000 tb->tc_ptr = tc_ptr;
1001 tb->cs_base = cs_base;
1003 tb->cflags = cflags;
1004 cpu_gen_code(env, tb, &code_gen_size);
1005 code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1));
1007 /* check next page if needed */
1008 virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
1010 if ((pc & TARGET_PAGE_MASK) != virt_page2) {
1011 phys_page2 = get_page_addr_code(env, virt_page2);
1013 tb_link_page(tb, phys_pc, phys_page2);
1017 /* invalidate all TBs which intersect with the target physical page
1018 starting in range [start;end[. NOTE: start and end must refer to
1019 the same physical page. 'is_cpu_write_access' should be true if called
1020 from a real cpu write access: the virtual CPU will exit the current
1021 TB if code is modified inside this TB. */
1022 void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
1023 int is_cpu_write_access)
1025 TranslationBlock *tb, *tb_next, *saved_tb;
1026 CPUState *env = cpu_single_env;
1027 tb_page_addr_t tb_start, tb_end;
1030 #ifdef TARGET_HAS_PRECISE_SMC
1031 int current_tb_not_found = is_cpu_write_access;
1032 TranslationBlock *current_tb = NULL;
1033 int current_tb_modified = 0;
1034 target_ulong current_pc = 0;
1035 target_ulong current_cs_base = 0;
1036 int current_flags = 0;
1037 #endif /* TARGET_HAS_PRECISE_SMC */
1039 p = page_find(start >> TARGET_PAGE_BITS);
1042 if (!p->code_bitmap &&
1043 ++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD &&
1044 is_cpu_write_access) {
1045 /* build code bitmap */
1046 build_page_bitmap(p);
1049 /* we remove all the TBs in the range [start, end[ */
1050 /* XXX: see if in some cases it could be faster to invalidate all the code */
1052 while (tb != NULL) {
1054 tb = (TranslationBlock *)((long)tb & ~3);
1055 tb_next = tb->page_next[n];
1056 /* NOTE: this is subtle as a TB may span two physical pages */
1058 /* NOTE: tb_end may be after the end of the page, but
1059 it is not a problem */
1060 tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
1061 tb_end = tb_start + tb->size;
1063 tb_start = tb->page_addr[1];
1064 tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK);
1066 if (!(tb_end <= start || tb_start >= end)) {
1067 #ifdef TARGET_HAS_PRECISE_SMC
1068 if (current_tb_not_found) {
1069 current_tb_not_found = 0;
1071 if (env->mem_io_pc) {
1072 /* now we have a real cpu fault */
1073 current_tb = tb_find_pc(env->mem_io_pc);
1076 if (current_tb == tb &&
1077 (current_tb->cflags & CF_COUNT_MASK) != 1) {
1078 /* If we are modifying the current TB, we must stop
1079 its execution. We could be more precise by checking
1080 that the modification is after the current PC, but it
1081 would require a specialized function to partially
1082 restore the CPU state */
1084 current_tb_modified = 1;
1085 cpu_restore_state(current_tb, env, env->mem_io_pc);
1086 cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base,
1089 #endif /* TARGET_HAS_PRECISE_SMC */
1090 /* we need to do that to handle the case where a signal
1091 occurs while doing tb_phys_invalidate() */
1094 saved_tb = env->current_tb;
1095 env->current_tb = NULL;
1097 tb_phys_invalidate(tb, -1);
1099 env->current_tb = saved_tb;
1100 if (env->interrupt_request && env->current_tb)
1101 cpu_interrupt(env, env->interrupt_request);
1106 #if !defined(CONFIG_USER_ONLY)
1107 /* if no code remaining, no need to continue to use slow writes */
1109 invalidate_page_bitmap(p);
1110 if (is_cpu_write_access) {
1111 tlb_unprotect_code_phys(env, start, env->mem_io_vaddr);
1115 #ifdef TARGET_HAS_PRECISE_SMC
1116 if (current_tb_modified) {
1117 /* we generate a block containing just the instruction
1118 modifying the memory. It will ensure that it cannot modify
1120 env->current_tb = NULL;
1121 tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
1122 cpu_resume_from_signal(env, NULL);
1127 /* len must be <= 8 and start must be a multiple of len */
1128 static inline void tb_invalidate_phys_page_fast(tb_page_addr_t start, int len)
1134 qemu_log("modifying code at 0x%x size=%d EIP=%x PC=%08x\n",
1135 cpu_single_env->mem_io_vaddr, len,
1136 cpu_single_env->eip,
1137 cpu_single_env->eip + (long)cpu_single_env->segs[R_CS].base);
1140 p = page_find(start >> TARGET_PAGE_BITS);
1143 if (p->code_bitmap) {
1144 offset = start & ~TARGET_PAGE_MASK;
1145 b = p->code_bitmap[offset >> 3] >> (offset & 7);
1146 if (b & ((1 << len) - 1))
1150 tb_invalidate_phys_page_range(start, start + len, 1);
1154 #if !defined(CONFIG_SOFTMMU)
1155 static void tb_invalidate_phys_page(tb_page_addr_t addr,
1156 unsigned long pc, void *puc)
1158 TranslationBlock *tb;
1161 #ifdef TARGET_HAS_PRECISE_SMC
1162 TranslationBlock *current_tb = NULL;
1163 CPUState *env = cpu_single_env;
1164 int current_tb_modified = 0;
1165 target_ulong current_pc = 0;
1166 target_ulong current_cs_base = 0;
1167 int current_flags = 0;
1170 addr &= TARGET_PAGE_MASK;
1171 p = page_find(addr >> TARGET_PAGE_BITS);
1175 #ifdef TARGET_HAS_PRECISE_SMC
1176 if (tb && pc != 0) {
1177 current_tb = tb_find_pc(pc);
1180 while (tb != NULL) {
1182 tb = (TranslationBlock *)((long)tb & ~3);
1183 #ifdef TARGET_HAS_PRECISE_SMC
1184 if (current_tb == tb &&
1185 (current_tb->cflags & CF_COUNT_MASK) != 1) {
1186 /* If we are modifying the current TB, we must stop
1187 its execution. We could be more precise by checking
1188 that the modification is after the current PC, but it
1189 would require a specialized function to partially
1190 restore the CPU state */
1192 current_tb_modified = 1;
1193 cpu_restore_state(current_tb, env, pc);
1194 cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base,
1197 #endif /* TARGET_HAS_PRECISE_SMC */
1198 tb_phys_invalidate(tb, addr);
1199 tb = tb->page_next[n];
1202 #ifdef TARGET_HAS_PRECISE_SMC
1203 if (current_tb_modified) {
1204 /* we generate a block containing just the instruction
1205 modifying the memory. It will ensure that it cannot modify
1207 env->current_tb = NULL;
1208 tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
1209 cpu_resume_from_signal(env, puc);
1215 /* add the tb in the target page and protect it if necessary */
1216 static inline void tb_alloc_page(TranslationBlock *tb,
1217 unsigned int n, tb_page_addr_t page_addr)
1220 #ifndef CONFIG_USER_ONLY
1221 bool page_already_protected;
1224 tb->page_addr[n] = page_addr;
1225 p = page_find_alloc(page_addr >> TARGET_PAGE_BITS, 1);
1226 tb->page_next[n] = p->first_tb;
1227 #ifndef CONFIG_USER_ONLY
1228 page_already_protected = p->first_tb != NULL;
1230 p->first_tb = (TranslationBlock *)((long)tb | n);
1231 invalidate_page_bitmap(p);
1233 #if defined(TARGET_HAS_SMC) || 1
1235 #if defined(CONFIG_USER_ONLY)
1236 if (p->flags & PAGE_WRITE) {
1241 /* force the host page as non writable (writes will have a
1242 page fault + mprotect overhead) */
1243 page_addr &= qemu_host_page_mask;
1245 for(addr = page_addr; addr < page_addr + qemu_host_page_size;
1246 addr += TARGET_PAGE_SIZE) {
1248 p2 = page_find (addr >> TARGET_PAGE_BITS);
1252 p2->flags &= ~PAGE_WRITE;
1254 mprotect(g2h(page_addr), qemu_host_page_size,
1255 (prot & PAGE_BITS) & ~PAGE_WRITE);
1256 #ifdef DEBUG_TB_INVALIDATE
1257 printf("protecting code page: 0x" TARGET_FMT_lx "\n",
1262 /* if some code is already present, then the pages are already
1263 protected. So we handle the case where only the first TB is
1264 allocated in a physical page */
1265 if (!page_already_protected) {
1266 tlb_protect_code(page_addr);
1270 #endif /* TARGET_HAS_SMC */
1273 /* add a new TB and link it to the physical page tables. phys_page2 is
1274 (-1) to indicate that only one page contains the TB. */
1275 void tb_link_page(TranslationBlock *tb,
1276 tb_page_addr_t phys_pc, tb_page_addr_t phys_page2)
1279 TranslationBlock **ptb;
1281 /* Grab the mmap lock to stop another thread invalidating this TB
1282 before we are done. */
1284 /* add in the physical hash table */
1285 h = tb_phys_hash_func(phys_pc);
1286 ptb = &tb_phys_hash[h];
1287 tb->phys_hash_next = *ptb;
1290 /* add in the page list */
1291 tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
1292 if (phys_page2 != -1)
1293 tb_alloc_page(tb, 1, phys_page2);
1295 tb->page_addr[1] = -1;
1297 tb->jmp_first = (TranslationBlock *)((long)tb | 2);
1298 tb->jmp_next[0] = NULL;
1299 tb->jmp_next[1] = NULL;
1301 /* init original jump addresses */
1302 if (tb->tb_next_offset[0] != 0xffff)
1303 tb_reset_jump(tb, 0);
1304 if (tb->tb_next_offset[1] != 0xffff)
1305 tb_reset_jump(tb, 1);
1307 #ifdef DEBUG_TB_CHECK
1313 /* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
1314 tb[1].tc_ptr. Return NULL if not found */
1315 TranslationBlock *tb_find_pc(unsigned long tc_ptr)
1317 int m_min, m_max, m;
1319 TranslationBlock *tb;
1323 if (tc_ptr < (unsigned long)code_gen_buffer ||
1324 tc_ptr >= (unsigned long)code_gen_ptr)
1326 /* binary search (cf Knuth) */
1329 while (m_min <= m_max) {
1330 m = (m_min + m_max) >> 1;
1332 v = (unsigned long)tb->tc_ptr;
1335 else if (tc_ptr < v) {
1344 static void tb_reset_jump_recursive(TranslationBlock *tb);
1346 static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n)
1348 TranslationBlock *tb1, *tb_next, **ptb;
1351 tb1 = tb->jmp_next[n];
1353 /* find head of list */
1356 tb1 = (TranslationBlock *)((long)tb1 & ~3);
1359 tb1 = tb1->jmp_next[n1];
1361 /* we are now sure now that tb jumps to tb1 */
1364 /* remove tb from the jmp_first list */
1365 ptb = &tb_next->jmp_first;
1369 tb1 = (TranslationBlock *)((long)tb1 & ~3);
1370 if (n1 == n && tb1 == tb)
1372 ptb = &tb1->jmp_next[n1];
1374 *ptb = tb->jmp_next[n];
1375 tb->jmp_next[n] = NULL;
1377 /* suppress the jump to next tb in generated code */
1378 tb_reset_jump(tb, n);
1380 /* suppress jumps in the tb on which we could have jumped */
1381 tb_reset_jump_recursive(tb_next);
1385 static void tb_reset_jump_recursive(TranslationBlock *tb)
1387 tb_reset_jump_recursive2(tb, 0);
1388 tb_reset_jump_recursive2(tb, 1);
1391 #if defined(TARGET_HAS_ICE)
1392 #if defined(CONFIG_USER_ONLY)
1393 static void breakpoint_invalidate(CPUState *env, target_ulong pc)
1395 tb_invalidate_phys_page_range(pc, pc + 1, 0);
1398 static void breakpoint_invalidate(CPUState *env, target_ulong pc)
1400 target_phys_addr_t addr;
1402 ram_addr_t ram_addr;
1405 addr = cpu_get_phys_page_debug(env, pc);
1406 p = phys_page_find(addr >> TARGET_PAGE_BITS);
1408 pd = IO_MEM_UNASSIGNED;
1410 pd = p->phys_offset;
1412 ram_addr = (pd & TARGET_PAGE_MASK) | (pc & ~TARGET_PAGE_MASK);
1413 tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0);
1416 #endif /* TARGET_HAS_ICE */
1418 #if defined(CONFIG_USER_ONLY)
1419 void cpu_watchpoint_remove_all(CPUState *env, int mask)
1424 int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len,
1425 int flags, CPUWatchpoint **watchpoint)
1430 /* Add a watchpoint. */
1431 int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len,
1432 int flags, CPUWatchpoint **watchpoint)
1434 target_ulong len_mask = ~(len - 1);
1437 /* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */
1438 if ((len != 1 && len != 2 && len != 4 && len != 8) || (addr & ~len_mask)) {
1439 fprintf(stderr, "qemu: tried to set invalid watchpoint at "
1440 TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len);
1443 wp = g_malloc(sizeof(*wp));
1446 wp->len_mask = len_mask;
1449 /* keep all GDB-injected watchpoints in front */
1451 QTAILQ_INSERT_HEAD(&env->watchpoints, wp, entry);
1453 QTAILQ_INSERT_TAIL(&env->watchpoints, wp, entry);
1455 tlb_flush_page(env, addr);
1462 /* Remove a specific watchpoint. */
1463 int cpu_watchpoint_remove(CPUState *env, target_ulong addr, target_ulong len,
1466 target_ulong len_mask = ~(len - 1);
1469 QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
1470 if (addr == wp->vaddr && len_mask == wp->len_mask
1471 && flags == (wp->flags & ~BP_WATCHPOINT_HIT)) {
1472 cpu_watchpoint_remove_by_ref(env, wp);
1479 /* Remove a specific watchpoint by reference. */
1480 void cpu_watchpoint_remove_by_ref(CPUState *env, CPUWatchpoint *watchpoint)
1482 QTAILQ_REMOVE(&env->watchpoints, watchpoint, entry);
1484 tlb_flush_page(env, watchpoint->vaddr);
1489 /* Remove all matching watchpoints. */
1490 void cpu_watchpoint_remove_all(CPUState *env, int mask)
1492 CPUWatchpoint *wp, *next;
1494 QTAILQ_FOREACH_SAFE(wp, &env->watchpoints, entry, next) {
1495 if (wp->flags & mask)
1496 cpu_watchpoint_remove_by_ref(env, wp);
1501 /* Add a breakpoint. */
1502 int cpu_breakpoint_insert(CPUState *env, target_ulong pc, int flags,
1503 CPUBreakpoint **breakpoint)
1505 #if defined(TARGET_HAS_ICE)
1508 bp = g_malloc(sizeof(*bp));
1513 /* keep all GDB-injected breakpoints in front */
1515 QTAILQ_INSERT_HEAD(&env->breakpoints, bp, entry);
1517 QTAILQ_INSERT_TAIL(&env->breakpoints, bp, entry);
1519 breakpoint_invalidate(env, pc);
1529 /* Remove a specific breakpoint. */
1530 int cpu_breakpoint_remove(CPUState *env, target_ulong pc, int flags)
1532 #if defined(TARGET_HAS_ICE)
1535 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
1536 if (bp->pc == pc && bp->flags == flags) {
1537 cpu_breakpoint_remove_by_ref(env, bp);
1547 /* Remove a specific breakpoint by reference. */
1548 void cpu_breakpoint_remove_by_ref(CPUState *env, CPUBreakpoint *breakpoint)
1550 #if defined(TARGET_HAS_ICE)
1551 QTAILQ_REMOVE(&env->breakpoints, breakpoint, entry);
1553 breakpoint_invalidate(env, breakpoint->pc);
1559 /* Remove all matching breakpoints. */
1560 void cpu_breakpoint_remove_all(CPUState *env, int mask)
1562 #if defined(TARGET_HAS_ICE)
1563 CPUBreakpoint *bp, *next;
1565 QTAILQ_FOREACH_SAFE(bp, &env->breakpoints, entry, next) {
1566 if (bp->flags & mask)
1567 cpu_breakpoint_remove_by_ref(env, bp);
1572 /* enable or disable single step mode. EXCP_DEBUG is returned by the
1573 CPU loop after each instruction */
1574 void cpu_single_step(CPUState *env, int enabled)
1576 #if defined(TARGET_HAS_ICE)
1577 if (env->singlestep_enabled != enabled) {
1578 env->singlestep_enabled = enabled;
1580 kvm_update_guest_debug(env, 0);
1582 /* must flush all the translated code to avoid inconsistencies */
1583 /* XXX: only flush what is necessary */
1590 /* enable or disable low levels log */
1591 void cpu_set_log(int log_flags)
1593 loglevel = log_flags;
1594 if (loglevel && !logfile) {
1595 logfile = fopen(logfilename, log_append ? "a" : "w");
1597 perror(logfilename);
1600 #if !defined(CONFIG_SOFTMMU)
1601 /* must avoid mmap() usage of glibc by setting a buffer "by hand" */
1603 static char logfile_buf[4096];
1604 setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
1606 #elif !defined(_WIN32)
1607 /* Win32 doesn't support line-buffering and requires size >= 2 */
1608 setvbuf(logfile, NULL, _IOLBF, 0);
1612 if (!loglevel && logfile) {
1618 void cpu_set_log_filename(const char *filename)
1620 logfilename = strdup(filename);
1625 cpu_set_log(loglevel);
1628 static void cpu_unlink_tb(CPUState *env)
1630 /* FIXME: TB unchaining isn't SMP safe. For now just ignore the
1631 problem and hope the cpu will stop of its own accord. For userspace
1632 emulation this often isn't actually as bad as it sounds. Often
1633 signals are used primarily to interrupt blocking syscalls. */
1634 TranslationBlock *tb;
1635 static spinlock_t interrupt_lock = SPIN_LOCK_UNLOCKED;
1637 spin_lock(&interrupt_lock);
1638 tb = env->current_tb;
1639 /* if the cpu is currently executing code, we must unlink it and
1640 all the potentially executing TB */
1642 env->current_tb = NULL;
1643 tb_reset_jump_recursive(tb);
1645 spin_unlock(&interrupt_lock);
1648 #ifndef CONFIG_USER_ONLY
1649 /* mask must never be zero, except for A20 change call */
1650 static void tcg_handle_interrupt(CPUState *env, int mask)
1654 old_mask = env->interrupt_request;
1655 env->interrupt_request |= mask;
1658 * If called from iothread context, wake the target cpu in
1661 if (!qemu_cpu_is_self(env)) {
1667 env->icount_decr.u16.high = 0xffff;
1669 && (mask & ~old_mask) != 0) {
1670 cpu_abort(env, "Raised interrupt while not in I/O function");
1677 CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt;
1679 #else /* CONFIG_USER_ONLY */
1681 void cpu_interrupt(CPUState *env, int mask)
1683 env->interrupt_request |= mask;
1686 #endif /* CONFIG_USER_ONLY */
1688 void cpu_reset_interrupt(CPUState *env, int mask)
1690 env->interrupt_request &= ~mask;
1693 void cpu_exit(CPUState *env)
1695 env->exit_request = 1;
1699 const CPULogItem cpu_log_items[] = {
1700 { CPU_LOG_TB_OUT_ASM, "out_asm",
1701 "show generated host assembly code for each compiled TB" },
1702 { CPU_LOG_TB_IN_ASM, "in_asm",
1703 "show target assembly code for each compiled TB" },
1704 { CPU_LOG_TB_OP, "op",
1705 "show micro ops for each compiled TB" },
1706 { CPU_LOG_TB_OP_OPT, "op_opt",
1709 "before eflags optimization and "
1711 "after liveness analysis" },
1712 { CPU_LOG_INT, "int",
1713 "show interrupts/exceptions in short format" },
1714 { CPU_LOG_EXEC, "exec",
1715 "show trace before each executed TB (lots of logs)" },
1716 { CPU_LOG_TB_CPU, "cpu",
1717 "show CPU state before block translation" },
1719 { CPU_LOG_PCALL, "pcall",
1720 "show protected mode far calls/returns/exceptions" },
1721 { CPU_LOG_RESET, "cpu_reset",
1722 "show CPU state before CPU resets" },
1725 { CPU_LOG_IOPORT, "ioport",
1726 "show all i/o ports accesses" },
1731 #ifndef CONFIG_USER_ONLY
1732 static QLIST_HEAD(memory_client_list, CPUPhysMemoryClient) memory_client_list
1733 = QLIST_HEAD_INITIALIZER(memory_client_list);
1735 static void cpu_notify_set_memory(target_phys_addr_t start_addr,
1737 ram_addr_t phys_offset,
1740 CPUPhysMemoryClient *client;
1741 QLIST_FOREACH(client, &memory_client_list, list) {
1742 client->set_memory(client, start_addr, size, phys_offset, log_dirty);
1746 static int cpu_notify_sync_dirty_bitmap(target_phys_addr_t start,
1747 target_phys_addr_t end)
1749 CPUPhysMemoryClient *client;
1750 QLIST_FOREACH(client, &memory_client_list, list) {
1751 int r = client->sync_dirty_bitmap(client, start, end);
1758 static int cpu_notify_migration_log(int enable)
1760 CPUPhysMemoryClient *client;
1761 QLIST_FOREACH(client, &memory_client_list, list) {
1762 int r = client->migration_log(client, enable);
1770 target_phys_addr_t start_addr;
1772 ram_addr_t phys_offset;
1775 /* The l1_phys_map provides the upper P_L1_BITs of the guest physical
1776 * address. Each intermediate table provides the next L2_BITs of guest
1777 * physical address space. The number of levels vary based on host and
1778 * guest configuration, making it efficient to build the final guest
1779 * physical address by seeding the L1 offset and shifting and adding in
1780 * each L2 offset as we recurse through them. */
1781 static void phys_page_for_each_1(CPUPhysMemoryClient *client, int level,
1782 void **lp, target_phys_addr_t addr,
1783 struct last_map *map)
1791 PhysPageDesc *pd = *lp;
1792 addr <<= L2_BITS + TARGET_PAGE_BITS;
1793 for (i = 0; i < L2_SIZE; ++i) {
1794 if (pd[i].phys_offset != IO_MEM_UNASSIGNED) {
1795 target_phys_addr_t start_addr = addr | i << TARGET_PAGE_BITS;
1798 start_addr == map->start_addr + map->size &&
1799 pd[i].phys_offset == map->phys_offset + map->size) {
1801 map->size += TARGET_PAGE_SIZE;
1803 } else if (map->size) {
1804 client->set_memory(client, map->start_addr,
1805 map->size, map->phys_offset, false);
1808 map->start_addr = start_addr;
1809 map->size = TARGET_PAGE_SIZE;
1810 map->phys_offset = pd[i].phys_offset;
1815 for (i = 0; i < L2_SIZE; ++i) {
1816 phys_page_for_each_1(client, level - 1, pp + i,
1817 (addr << L2_BITS) | i, map);
1822 static void phys_page_for_each(CPUPhysMemoryClient *client)
1825 struct last_map map = { };
1827 for (i = 0; i < P_L1_SIZE; ++i) {
1828 phys_page_for_each_1(client, P_L1_SHIFT / L2_BITS - 1,
1829 l1_phys_map + i, i, &map);
1832 client->set_memory(client, map.start_addr, map.size, map.phys_offset,
1837 void cpu_register_phys_memory_client(CPUPhysMemoryClient *client)
1839 QLIST_INSERT_HEAD(&memory_client_list, client, list);
1840 phys_page_for_each(client);
1843 void cpu_unregister_phys_memory_client(CPUPhysMemoryClient *client)
1845 QLIST_REMOVE(client, list);
1849 static int cmp1(const char *s1, int n, const char *s2)
1851 if (strlen(s2) != n)
1853 return memcmp(s1, s2, n) == 0;
1856 /* takes a comma separated list of log masks. Return 0 if error. */
1857 int cpu_str_to_log_mask(const char *str)
1859 const CPULogItem *item;
1866 p1 = strchr(p, ',');
1869 if(cmp1(p,p1-p,"all")) {
1870 for(item = cpu_log_items; item->mask != 0; item++) {
1874 for(item = cpu_log_items; item->mask != 0; item++) {
1875 if (cmp1(p, p1 - p, item->name))
1889 void cpu_abort(CPUState *env, const char *fmt, ...)
1896 fprintf(stderr, "qemu: fatal: ");
1897 vfprintf(stderr, fmt, ap);
1898 fprintf(stderr, "\n");
1900 cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP);
1902 cpu_dump_state(env, stderr, fprintf, 0);
1904 if (qemu_log_enabled()) {
1905 qemu_log("qemu: fatal: ");
1906 qemu_log_vprintf(fmt, ap2);
1909 log_cpu_state(env, X86_DUMP_FPU | X86_DUMP_CCOP);
1911 log_cpu_state(env, 0);
1918 #if defined(CONFIG_USER_ONLY)
1920 struct sigaction act;
1921 sigfillset(&act.sa_mask);
1922 act.sa_handler = SIG_DFL;
1923 sigaction(SIGABRT, &act, NULL);
1929 CPUState *cpu_copy(CPUState *env)
1931 CPUState *new_env = cpu_init(env->cpu_model_str);
1932 CPUState *next_cpu = new_env->next_cpu;
1933 int cpu_index = new_env->cpu_index;
1934 #if defined(TARGET_HAS_ICE)
1939 memcpy(new_env, env, sizeof(CPUState));
1941 /* Preserve chaining and index. */
1942 new_env->next_cpu = next_cpu;
1943 new_env->cpu_index = cpu_index;
1945 /* Clone all break/watchpoints.
1946 Note: Once we support ptrace with hw-debug register access, make sure
1947 BP_CPU break/watchpoints are handled correctly on clone. */
1948 QTAILQ_INIT(&env->breakpoints);
1949 QTAILQ_INIT(&env->watchpoints);
1950 #if defined(TARGET_HAS_ICE)
1951 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
1952 cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL);
1954 QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
1955 cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1,
1963 #if !defined(CONFIG_USER_ONLY)
1965 static inline void tlb_flush_jmp_cache(CPUState *env, target_ulong addr)
1969 /* Discard jump cache entries for any tb which might potentially
1970 overlap the flushed page. */
1971 i = tb_jmp_cache_hash_page(addr - TARGET_PAGE_SIZE);
1972 memset (&env->tb_jmp_cache[i], 0,
1973 TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
1975 i = tb_jmp_cache_hash_page(addr);
1976 memset (&env->tb_jmp_cache[i], 0,
1977 TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
1980 static CPUTLBEntry s_cputlb_empty_entry = {
1987 /* NOTE: if flush_global is true, also flush global entries (not
1989 void tlb_flush(CPUState *env, int flush_global)
1993 #if defined(DEBUG_TLB)
1994 printf("tlb_flush:\n");
1996 /* must reset current TB so that interrupts cannot modify the
1997 links while we are modifying them */
1998 env->current_tb = NULL;
2000 for(i = 0; i < CPU_TLB_SIZE; i++) {
2002 for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
2003 env->tlb_table[mmu_idx][i] = s_cputlb_empty_entry;
2007 memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *));
2009 env->tlb_flush_addr = -1;
2010 env->tlb_flush_mask = 0;
2014 static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr)
2016 if (addr == (tlb_entry->addr_read &
2017 (TARGET_PAGE_MASK | TLB_INVALID_MASK)) ||
2018 addr == (tlb_entry->addr_write &
2019 (TARGET_PAGE_MASK | TLB_INVALID_MASK)) ||
2020 addr == (tlb_entry->addr_code &
2021 (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
2022 *tlb_entry = s_cputlb_empty_entry;
2026 void tlb_flush_page(CPUState *env, target_ulong addr)
2031 #if defined(DEBUG_TLB)
2032 printf("tlb_flush_page: " TARGET_FMT_lx "\n", addr);
2034 /* Check if we need to flush due to large pages. */
2035 if ((addr & env->tlb_flush_mask) == env->tlb_flush_addr) {
2036 #if defined(DEBUG_TLB)
2037 printf("tlb_flush_page: forced full flush ("
2038 TARGET_FMT_lx "/" TARGET_FMT_lx ")\n",
2039 env->tlb_flush_addr, env->tlb_flush_mask);
2044 /* must reset current TB so that interrupts cannot modify the
2045 links while we are modifying them */
2046 env->current_tb = NULL;
2048 addr &= TARGET_PAGE_MASK;
2049 i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
2050 for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++)
2051 tlb_flush_entry(&env->tlb_table[mmu_idx][i], addr);
2053 tlb_flush_jmp_cache(env, addr);
2056 /* update the TLBs so that writes to code in the virtual page 'addr'
2058 static void tlb_protect_code(ram_addr_t ram_addr)
2060 cpu_physical_memory_reset_dirty(ram_addr,
2061 ram_addr + TARGET_PAGE_SIZE,
2065 /* update the TLB so that writes in physical page 'phys_addr' are no longer
2066 tested for self modifying code */
2067 static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr,
2070 cpu_physical_memory_set_dirty_flags(ram_addr, CODE_DIRTY_FLAG);
2073 static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry,
2074 unsigned long start, unsigned long length)
2077 if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
2078 addr = (tlb_entry->addr_write & TARGET_PAGE_MASK) + tlb_entry->addend;
2079 if ((addr - start) < length) {
2080 tlb_entry->addr_write = (tlb_entry->addr_write & TARGET_PAGE_MASK) | TLB_NOTDIRTY;
2085 /* Note: start and end must be within the same ram block. */
2086 void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
2090 unsigned long length, start1;
2093 start &= TARGET_PAGE_MASK;
2094 end = TARGET_PAGE_ALIGN(end);
2096 length = end - start;
2099 cpu_physical_memory_mask_dirty_range(start, length, dirty_flags);
2101 /* we modify the TLB cache so that the dirty bit will be set again
2102 when accessing the range */
2103 start1 = (unsigned long)qemu_safe_ram_ptr(start);
2104 /* Check that we don't span multiple blocks - this breaks the
2105 address comparisons below. */
2106 if ((unsigned long)qemu_safe_ram_ptr(end - 1) - start1
2107 != (end - 1) - start) {
2111 for(env = first_cpu; env != NULL; env = env->next_cpu) {
2113 for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
2114 for(i = 0; i < CPU_TLB_SIZE; i++)
2115 tlb_reset_dirty_range(&env->tlb_table[mmu_idx][i],
2121 int cpu_physical_memory_set_dirty_tracking(int enable)
2124 in_migration = enable;
2125 ret = cpu_notify_migration_log(!!enable);
2129 int cpu_physical_memory_get_dirty_tracking(void)
2131 return in_migration;
2134 int cpu_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
2135 target_phys_addr_t end_addr)
2139 ret = cpu_notify_sync_dirty_bitmap(start_addr, end_addr);
2143 int cpu_physical_log_start(target_phys_addr_t start_addr,
2146 CPUPhysMemoryClient *client;
2147 QLIST_FOREACH(client, &memory_client_list, list) {
2148 if (client->log_start) {
2149 int r = client->log_start(client, start_addr, size);
2158 int cpu_physical_log_stop(target_phys_addr_t start_addr,
2161 CPUPhysMemoryClient *client;
2162 QLIST_FOREACH(client, &memory_client_list, list) {
2163 if (client->log_stop) {
2164 int r = client->log_stop(client, start_addr, size);
2173 static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry)
2175 ram_addr_t ram_addr;
2178 if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
2179 p = (void *)(unsigned long)((tlb_entry->addr_write & TARGET_PAGE_MASK)
2180 + tlb_entry->addend);
2181 ram_addr = qemu_ram_addr_from_host_nofail(p);
2182 if (!cpu_physical_memory_is_dirty(ram_addr)) {
2183 tlb_entry->addr_write |= TLB_NOTDIRTY;
2188 /* update the TLB according to the current state of the dirty bits */
2189 void cpu_tlb_update_dirty(CPUState *env)
2193 for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
2194 for(i = 0; i < CPU_TLB_SIZE; i++)
2195 tlb_update_dirty(&env->tlb_table[mmu_idx][i]);
2199 static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, target_ulong vaddr)
2201 if (tlb_entry->addr_write == (vaddr | TLB_NOTDIRTY))
2202 tlb_entry->addr_write = vaddr;
2205 /* update the TLB corresponding to virtual page vaddr
2206 so that it is no longer dirty */
2207 static inline void tlb_set_dirty(CPUState *env, target_ulong vaddr)
2212 vaddr &= TARGET_PAGE_MASK;
2213 i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
2214 for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++)
2215 tlb_set_dirty1(&env->tlb_table[mmu_idx][i], vaddr);
2218 /* Our TLB does not support large pages, so remember the area covered by
2219 large pages and trigger a full TLB flush if these are invalidated. */
2220 static void tlb_add_large_page(CPUState *env, target_ulong vaddr,
2223 target_ulong mask = ~(size - 1);
2225 if (env->tlb_flush_addr == (target_ulong)-1) {
2226 env->tlb_flush_addr = vaddr & mask;
2227 env->tlb_flush_mask = mask;
2230 /* Extend the existing region to include the new page.
2231 This is a compromise between unnecessary flushes and the cost
2232 of maintaining a full variable size TLB. */
2233 mask &= env->tlb_flush_mask;
2234 while (((env->tlb_flush_addr ^ vaddr) & mask) != 0) {
2237 env->tlb_flush_addr &= mask;
2238 env->tlb_flush_mask = mask;
2241 /* Add a new TLB entry. At most one entry for a given virtual address
2242 is permitted. Only a single TARGET_PAGE_SIZE region is mapped, the
2243 supplied size is only used by tlb_flush_page. */
2244 void tlb_set_page(CPUState *env, target_ulong vaddr,
2245 target_phys_addr_t paddr, int prot,
2246 int mmu_idx, target_ulong size)
2251 target_ulong address;
2252 target_ulong code_address;
2253 unsigned long addend;
2256 target_phys_addr_t iotlb;
2258 assert(size >= TARGET_PAGE_SIZE);
2259 if (size != TARGET_PAGE_SIZE) {
2260 tlb_add_large_page(env, vaddr, size);
2262 p = phys_page_find(paddr >> TARGET_PAGE_BITS);
2264 pd = IO_MEM_UNASSIGNED;
2266 pd = p->phys_offset;
2268 #if defined(DEBUG_TLB)
2269 printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x" TARGET_FMT_plx
2270 " prot=%x idx=%d pd=0x%08lx\n",
2271 vaddr, paddr, prot, mmu_idx, pd);
2275 if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) {
2276 /* IO memory case (romd handled later) */
2277 address |= TLB_MMIO;
2279 addend = (unsigned long)qemu_get_ram_ptr(pd & TARGET_PAGE_MASK);
2280 if ((pd & ~TARGET_PAGE_MASK) <= IO_MEM_ROM) {
2282 iotlb = pd & TARGET_PAGE_MASK;
2283 if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM)
2284 iotlb |= IO_MEM_NOTDIRTY;
2286 iotlb |= IO_MEM_ROM;
2288 /* IO handlers are currently passed a physical address.
2289 It would be nice to pass an offset from the base address
2290 of that region. This would avoid having to special case RAM,
2291 and avoid full address decoding in every device.
2292 We can't use the high bits of pd for this because
2293 IO_MEM_ROMD uses these as a ram address. */
2294 iotlb = (pd & ~TARGET_PAGE_MASK);
2296 iotlb += p->region_offset;
2302 code_address = address;
2303 /* Make accesses to pages with watchpoints go via the
2304 watchpoint trap routines. */
2305 QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
2306 if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) {
2307 /* Avoid trapping reads of pages with a write breakpoint. */
2308 if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) {
2309 iotlb = io_mem_watch + paddr;
2310 address |= TLB_MMIO;
2316 index = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
2317 env->iotlb[mmu_idx][index] = iotlb - vaddr;
2318 te = &env->tlb_table[mmu_idx][index];
2319 te->addend = addend - vaddr;
2320 if (prot & PAGE_READ) {
2321 te->addr_read = address;
2326 if (prot & PAGE_EXEC) {
2327 te->addr_code = code_address;
2331 if (prot & PAGE_WRITE) {
2332 if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM ||
2333 (pd & IO_MEM_ROMD)) {
2334 /* Write access calls the I/O callback. */
2335 te->addr_write = address | TLB_MMIO;
2336 } else if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM &&
2337 !cpu_physical_memory_is_dirty(pd)) {
2338 te->addr_write = address | TLB_NOTDIRTY;
2340 te->addr_write = address;
2343 te->addr_write = -1;
2349 void tlb_flush(CPUState *env, int flush_global)
2353 void tlb_flush_page(CPUState *env, target_ulong addr)
2358 * Walks guest process memory "regions" one by one
2359 * and calls callback function 'fn' for each region.
2362 struct walk_memory_regions_data
2364 walk_memory_regions_fn fn;
2366 unsigned long start;
2370 static int walk_memory_regions_end(struct walk_memory_regions_data *data,
2371 abi_ulong end, int new_prot)
2373 if (data->start != -1ul) {
2374 int rc = data->fn(data->priv, data->start, end, data->prot);
2380 data->start = (new_prot ? end : -1ul);
2381 data->prot = new_prot;
2386 static int walk_memory_regions_1(struct walk_memory_regions_data *data,
2387 abi_ulong base, int level, void **lp)
2393 return walk_memory_regions_end(data, base, 0);
2398 for (i = 0; i < L2_SIZE; ++i) {
2399 int prot = pd[i].flags;
2401 pa = base | (i << TARGET_PAGE_BITS);
2402 if (prot != data->prot) {
2403 rc = walk_memory_regions_end(data, pa, prot);
2411 for (i = 0; i < L2_SIZE; ++i) {
2412 pa = base | ((abi_ulong)i <<
2413 (TARGET_PAGE_BITS + L2_BITS * level));
2414 rc = walk_memory_regions_1(data, pa, level - 1, pp + i);
2424 int walk_memory_regions(void *priv, walk_memory_regions_fn fn)
2426 struct walk_memory_regions_data data;
2434 for (i = 0; i < V_L1_SIZE; i++) {
2435 int rc = walk_memory_regions_1(&data, (abi_ulong)i << V_L1_SHIFT,
2436 V_L1_SHIFT / L2_BITS - 1, l1_map + i);
2442 return walk_memory_regions_end(&data, 0, 0);
2445 static int dump_region(void *priv, abi_ulong start,
2446 abi_ulong end, unsigned long prot)
2448 FILE *f = (FILE *)priv;
2450 (void) fprintf(f, TARGET_ABI_FMT_lx"-"TARGET_ABI_FMT_lx
2451 " "TARGET_ABI_FMT_lx" %c%c%c\n",
2452 start, end, end - start,
2453 ((prot & PAGE_READ) ? 'r' : '-'),
2454 ((prot & PAGE_WRITE) ? 'w' : '-'),
2455 ((prot & PAGE_EXEC) ? 'x' : '-'));
2460 /* dump memory mappings */
2461 void page_dump(FILE *f)
2463 (void) fprintf(f, "%-8s %-8s %-8s %s\n",
2464 "start", "end", "size", "prot");
2465 walk_memory_regions(f, dump_region);
2468 int page_get_flags(target_ulong address)
2472 p = page_find(address >> TARGET_PAGE_BITS);
2478 /* Modify the flags of a page and invalidate the code if necessary.
2479 The flag PAGE_WRITE_ORG is positioned automatically depending
2480 on PAGE_WRITE. The mmap_lock should already be held. */
2481 void page_set_flags(target_ulong start, target_ulong end, int flags)
2483 target_ulong addr, len;
2485 /* This function should never be called with addresses outside the
2486 guest address space. If this assert fires, it probably indicates
2487 a missing call to h2g_valid. */
2488 #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS
2489 assert(end < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS));
2491 assert(start < end);
2493 start = start & TARGET_PAGE_MASK;
2494 end = TARGET_PAGE_ALIGN(end);
2496 if (flags & PAGE_WRITE) {
2497 flags |= PAGE_WRITE_ORG;
2500 for (addr = start, len = end - start;
2502 len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) {
2503 PageDesc *p = page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
2505 /* If the write protection bit is set, then we invalidate
2507 if (!(p->flags & PAGE_WRITE) &&
2508 (flags & PAGE_WRITE) &&
2510 tb_invalidate_phys_page(addr, 0, NULL);
2516 int page_check_range(target_ulong start, target_ulong len, int flags)
2522 /* This function should never be called with addresses outside the
2523 guest address space. If this assert fires, it probably indicates
2524 a missing call to h2g_valid. */
2525 #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS
2526 assert(start < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS));
2532 if (start + len - 1 < start) {
2533 /* We've wrapped around. */
2537 end = TARGET_PAGE_ALIGN(start+len); /* must do before we loose bits in the next step */
2538 start = start & TARGET_PAGE_MASK;
2540 for (addr = start, len = end - start;
2542 len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) {
2543 p = page_find(addr >> TARGET_PAGE_BITS);
2546 if( !(p->flags & PAGE_VALID) )
2549 if ((flags & PAGE_READ) && !(p->flags & PAGE_READ))
2551 if (flags & PAGE_WRITE) {
2552 if (!(p->flags & PAGE_WRITE_ORG))
2554 /* unprotect the page if it was put read-only because it
2555 contains translated code */
2556 if (!(p->flags & PAGE_WRITE)) {
2557 if (!page_unprotect(addr, 0, NULL))
2566 /* called from signal handler: invalidate the code and unprotect the
2567 page. Return TRUE if the fault was successfully handled. */
2568 int page_unprotect(target_ulong address, unsigned long pc, void *puc)
2572 target_ulong host_start, host_end, addr;
2574 /* Technically this isn't safe inside a signal handler. However we
2575 know this only ever happens in a synchronous SEGV handler, so in
2576 practice it seems to be ok. */
2579 p = page_find(address >> TARGET_PAGE_BITS);
2585 /* if the page was really writable, then we change its
2586 protection back to writable */
2587 if ((p->flags & PAGE_WRITE_ORG) && !(p->flags & PAGE_WRITE)) {
2588 host_start = address & qemu_host_page_mask;
2589 host_end = host_start + qemu_host_page_size;
2592 for (addr = host_start ; addr < host_end ; addr += TARGET_PAGE_SIZE) {
2593 p = page_find(addr >> TARGET_PAGE_BITS);
2594 p->flags |= PAGE_WRITE;
2597 /* and since the content will be modified, we must invalidate
2598 the corresponding translated code. */
2599 tb_invalidate_phys_page(addr, pc, puc);
2600 #ifdef DEBUG_TB_CHECK
2601 tb_invalidate_check(addr);
2604 mprotect((void *)g2h(host_start), qemu_host_page_size,
2614 static inline void tlb_set_dirty(CPUState *env,
2615 unsigned long addr, target_ulong vaddr)
2618 #endif /* defined(CONFIG_USER_ONLY) */
2620 #if !defined(CONFIG_USER_ONLY)
2622 #define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK)
2623 typedef struct subpage_t {
2624 target_phys_addr_t base;
2625 ram_addr_t sub_io_index[TARGET_PAGE_SIZE];
2626 ram_addr_t region_offset[TARGET_PAGE_SIZE];
2629 static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
2630 ram_addr_t memory, ram_addr_t region_offset);
2631 static subpage_t *subpage_init (target_phys_addr_t base, ram_addr_t *phys,
2632 ram_addr_t orig_memory,
2633 ram_addr_t region_offset);
2634 #define CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2, \
2637 if (addr > start_addr) \
2640 start_addr2 = start_addr & ~TARGET_PAGE_MASK; \
2641 if (start_addr2 > 0) \
2645 if ((start_addr + orig_size) - addr >= TARGET_PAGE_SIZE) \
2646 end_addr2 = TARGET_PAGE_SIZE - 1; \
2648 end_addr2 = (start_addr + orig_size - 1) & ~TARGET_PAGE_MASK; \
2649 if (end_addr2 < TARGET_PAGE_SIZE - 1) \
2654 /* register physical memory.
2655 For RAM, 'size' must be a multiple of the target page size.
2656 If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
2657 io memory page. The address used when calling the IO function is
2658 the offset from the start of the region, plus region_offset. Both
2659 start_addr and region_offset are rounded down to a page boundary
2660 before calculating this offset. This should not be a problem unless
2661 the low bits of start_addr and region_offset differ. */
2662 void cpu_register_physical_memory_log(target_phys_addr_t start_addr,
2664 ram_addr_t phys_offset,
2665 ram_addr_t region_offset,
2668 target_phys_addr_t addr, end_addr;
2671 ram_addr_t orig_size = size;
2675 cpu_notify_set_memory(start_addr, size, phys_offset, log_dirty);
2677 if (phys_offset == IO_MEM_UNASSIGNED) {
2678 region_offset = start_addr;
2680 region_offset &= TARGET_PAGE_MASK;
2681 size = (size + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK;
2682 end_addr = start_addr + (target_phys_addr_t)size;
2686 p = phys_page_find(addr >> TARGET_PAGE_BITS);
2687 if (p && p->phys_offset != IO_MEM_UNASSIGNED) {
2688 ram_addr_t orig_memory = p->phys_offset;
2689 target_phys_addr_t start_addr2, end_addr2;
2690 int need_subpage = 0;
2692 CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2,
2695 if (!(orig_memory & IO_MEM_SUBPAGE)) {
2696 subpage = subpage_init((addr & TARGET_PAGE_MASK),
2697 &p->phys_offset, orig_memory,
2700 subpage = io_mem_opaque[(orig_memory & ~TARGET_PAGE_MASK)
2703 subpage_register(subpage, start_addr2, end_addr2, phys_offset,
2705 p->region_offset = 0;
2707 p->phys_offset = phys_offset;
2708 if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM ||
2709 (phys_offset & IO_MEM_ROMD))
2710 phys_offset += TARGET_PAGE_SIZE;
2713 p = phys_page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
2714 p->phys_offset = phys_offset;
2715 p->region_offset = region_offset;
2716 if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM ||
2717 (phys_offset & IO_MEM_ROMD)) {
2718 phys_offset += TARGET_PAGE_SIZE;
2720 target_phys_addr_t start_addr2, end_addr2;
2721 int need_subpage = 0;
2723 CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr,
2724 end_addr2, need_subpage);
2727 subpage = subpage_init((addr & TARGET_PAGE_MASK),
2728 &p->phys_offset, IO_MEM_UNASSIGNED,
2729 addr & TARGET_PAGE_MASK);
2730 subpage_register(subpage, start_addr2, end_addr2,
2731 phys_offset, region_offset);
2732 p->region_offset = 0;
2736 region_offset += TARGET_PAGE_SIZE;
2737 addr += TARGET_PAGE_SIZE;
2738 } while (addr != end_addr);
2740 /* since each CPU stores ram addresses in its TLB cache, we must
2741 reset the modified entries */
2743 for(env = first_cpu; env != NULL; env = env->next_cpu) {
2748 /* XXX: temporary until new memory mapping API */
2749 ram_addr_t cpu_get_physical_page_desc(target_phys_addr_t addr)
2753 p = phys_page_find(addr >> TARGET_PAGE_BITS);
2755 return IO_MEM_UNASSIGNED;
2756 return p->phys_offset;
2759 void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size)
2762 kvm_coalesce_mmio_region(addr, size);
2765 void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size)
2768 kvm_uncoalesce_mmio_region(addr, size);
2771 void qemu_flush_coalesced_mmio_buffer(void)
2774 kvm_flush_coalesced_mmio_buffer();
2777 #if defined(__linux__) && !defined(TARGET_S390X)
2779 #include <sys/vfs.h>
2781 #define HUGETLBFS_MAGIC 0x958458f6
2783 static long gethugepagesize(const char *path)
2789 ret = statfs(path, &fs);
2790 } while (ret != 0 && errno == EINTR);
2797 if (fs.f_type != HUGETLBFS_MAGIC)
2798 fprintf(stderr, "Warning: path not on HugeTLBFS: %s\n", path);
2803 static void *file_ram_alloc(RAMBlock *block,
2813 unsigned long hpagesize;
2815 hpagesize = gethugepagesize(path);
2820 if (memory < hpagesize) {
2824 if (kvm_enabled() && !kvm_has_sync_mmu()) {
2825 fprintf(stderr, "host lacks kvm mmu notifiers, -mem-path unsupported\n");
2829 if (asprintf(&filename, "%s/qemu_back_mem.XXXXXX", path) == -1) {
2833 fd = mkstemp(filename);
2835 perror("unable to create backing store for hugepages");
2842 memory = (memory+hpagesize-1) & ~(hpagesize-1);
2845 * ftruncate is not supported by hugetlbfs in older
2846 * hosts, so don't bother bailing out on errors.
2847 * If anything goes wrong with it under other filesystems,
2850 if (ftruncate(fd, memory))
2851 perror("ftruncate");
2854 /* NB: MAP_POPULATE won't exhaustively alloc all phys pages in the case
2855 * MAP_PRIVATE is requested. For mem_prealloc we mmap as MAP_SHARED
2856 * to sidestep this quirk.
2858 flags = mem_prealloc ? MAP_POPULATE | MAP_SHARED : MAP_PRIVATE;
2859 area = mmap(0, memory, PROT_READ | PROT_WRITE, flags, fd, 0);
2861 area = mmap(0, memory, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
2863 if (area == MAP_FAILED) {
2864 perror("file_ram_alloc: can't mmap RAM pages");
2873 static ram_addr_t find_ram_offset(ram_addr_t size)
2875 RAMBlock *block, *next_block;
2876 ram_addr_t offset = 0, mingap = RAM_ADDR_MAX;
2878 if (QLIST_EMPTY(&ram_list.blocks))
2881 QLIST_FOREACH(block, &ram_list.blocks, next) {
2882 ram_addr_t end, next = RAM_ADDR_MAX;
2884 end = block->offset + block->length;
2886 QLIST_FOREACH(next_block, &ram_list.blocks, next) {
2887 if (next_block->offset >= end) {
2888 next = MIN(next, next_block->offset);
2891 if (next - end >= size && next - end < mingap) {
2893 mingap = next - end;
2899 static ram_addr_t last_ram_offset(void)
2902 ram_addr_t last = 0;
2904 QLIST_FOREACH(block, &ram_list.blocks, next)
2905 last = MAX(last, block->offset + block->length);
2910 ram_addr_t qemu_ram_alloc_from_ptr(DeviceState *dev, const char *name,
2911 ram_addr_t size, void *host)
2913 RAMBlock *new_block, *block;
2915 size = TARGET_PAGE_ALIGN(size);
2916 new_block = g_malloc0(sizeof(*new_block));
2918 if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
2919 char *id = dev->parent_bus->info->get_dev_path(dev);
2921 snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id);
2925 pstrcat(new_block->idstr, sizeof(new_block->idstr), name);
2927 QLIST_FOREACH(block, &ram_list.blocks, next) {
2928 if (!strcmp(block->idstr, new_block->idstr)) {
2929 fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n",
2935 new_block->offset = find_ram_offset(size);
2937 new_block->host = host;
2938 new_block->flags |= RAM_PREALLOC_MASK;
2941 #if defined (__linux__) && !defined(TARGET_S390X)
2942 new_block->host = file_ram_alloc(new_block, size, mem_path);
2943 if (!new_block->host) {
2944 new_block->host = qemu_vmalloc(size);
2945 qemu_madvise(new_block->host, size, QEMU_MADV_MERGEABLE);
2948 fprintf(stderr, "-mem-path option unsupported\n");
2952 #if defined(TARGET_S390X) && defined(CONFIG_KVM)
2953 /* S390 KVM requires the topmost vma of the RAM to be smaller than
2954 an system defined value, which is at least 256GB. Larger systems
2955 have larger values. We put the guest between the end of data
2956 segment (system break) and this value. We use 32GB as a base to
2957 have enough room for the system break to grow. */
2958 new_block->host = mmap((void*)0x800000000, size,
2959 PROT_EXEC|PROT_READ|PROT_WRITE,
2960 MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
2961 if (new_block->host == MAP_FAILED) {
2962 fprintf(stderr, "Allocating RAM failed\n");
2966 if (xen_enabled()) {
2967 xen_ram_alloc(new_block->offset, size);
2969 new_block->host = qemu_vmalloc(size);
2972 qemu_madvise(new_block->host, size, QEMU_MADV_MERGEABLE);
2975 new_block->length = size;
2977 QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next);
2979 ram_list.phys_dirty = g_realloc(ram_list.phys_dirty,
2980 last_ram_offset() >> TARGET_PAGE_BITS);
2981 memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
2982 0xff, size >> TARGET_PAGE_BITS);
2985 kvm_setup_guest_memory(new_block->host, size);
2987 return new_block->offset;
2990 ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size)
2992 return qemu_ram_alloc_from_ptr(dev, name, size, NULL);
2995 void qemu_ram_free_from_ptr(ram_addr_t addr)
2999 QLIST_FOREACH(block, &ram_list.blocks, next) {
3000 if (addr == block->offset) {
3001 QLIST_REMOVE(block, next);
3008 void qemu_ram_free(ram_addr_t addr)
3012 QLIST_FOREACH(block, &ram_list.blocks, next) {
3013 if (addr == block->offset) {
3014 QLIST_REMOVE(block, next);
3015 if (block->flags & RAM_PREALLOC_MASK) {
3017 } else if (mem_path) {
3018 #if defined (__linux__) && !defined(TARGET_S390X)
3020 munmap(block->host, block->length);
3023 qemu_vfree(block->host);
3029 #if defined(TARGET_S390X) && defined(CONFIG_KVM)
3030 munmap(block->host, block->length);
3032 if (xen_enabled()) {
3033 xen_invalidate_map_cache_entry(block->host);
3035 qemu_vfree(block->host);
3047 void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
3054 QLIST_FOREACH(block, &ram_list.blocks, next) {
3055 offset = addr - block->offset;
3056 if (offset < block->length) {
3057 vaddr = block->host + offset;
3058 if (block->flags & RAM_PREALLOC_MASK) {
3062 munmap(vaddr, length);
3064 #if defined(__linux__) && !defined(TARGET_S390X)
3067 flags |= mem_prealloc ? MAP_POPULATE | MAP_SHARED :
3070 flags |= MAP_PRIVATE;
3072 area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
3073 flags, block->fd, offset);
3075 flags |= MAP_PRIVATE | MAP_ANONYMOUS;
3076 area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
3083 #if defined(TARGET_S390X) && defined(CONFIG_KVM)
3084 flags |= MAP_SHARED | MAP_ANONYMOUS;
3085 area = mmap(vaddr, length, PROT_EXEC|PROT_READ|PROT_WRITE,
3088 flags |= MAP_PRIVATE | MAP_ANONYMOUS;
3089 area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
3093 if (area != vaddr) {
3094 fprintf(stderr, "Could not remap addr: "
3095 RAM_ADDR_FMT "@" RAM_ADDR_FMT "\n",
3099 qemu_madvise(vaddr, length, QEMU_MADV_MERGEABLE);
3105 #endif /* !_WIN32 */
3107 /* Return a host pointer to ram allocated with qemu_ram_alloc.
3108 With the exception of the softmmu code in this file, this should
3109 only be used for local memory (e.g. video ram) that the device owns,
3110 and knows it isn't going to access beyond the end of the block.
3112 It should not be used for general purpose DMA.
3113 Use cpu_physical_memory_map/cpu_physical_memory_rw instead.
3115 void *qemu_get_ram_ptr(ram_addr_t addr)
3119 QLIST_FOREACH(block, &ram_list.blocks, next) {
3120 if (addr - block->offset < block->length) {
3121 /* Move this entry to to start of the list. */
3122 if (block != QLIST_FIRST(&ram_list.blocks)) {
3123 QLIST_REMOVE(block, next);
3124 QLIST_INSERT_HEAD(&ram_list.blocks, block, next);
3126 if (xen_enabled()) {
3127 /* We need to check if the requested address is in the RAM
3128 * because we don't want to map the entire memory in QEMU.
3129 * In that case just map until the end of the page.
3131 if (block->offset == 0) {
3132 return xen_map_cache(addr, 0, 0);
3133 } else if (block->host == NULL) {
3135 xen_map_cache(block->offset, block->length, 1);
3138 return block->host + (addr - block->offset);
3142 fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr);
3148 /* Return a host pointer to ram allocated with qemu_ram_alloc.
3149 * Same as qemu_get_ram_ptr but avoid reordering ramblocks.
3151 void *qemu_safe_ram_ptr(ram_addr_t addr)
3155 QLIST_FOREACH(block, &ram_list.blocks, next) {
3156 if (addr - block->offset < block->length) {
3157 if (xen_enabled()) {
3158 /* We need to check if the requested address is in the RAM
3159 * because we don't want to map the entire memory in QEMU.
3160 * In that case just map until the end of the page.
3162 if (block->offset == 0) {
3163 return xen_map_cache(addr, 0, 0);
3164 } else if (block->host == NULL) {
3166 xen_map_cache(block->offset, block->length, 1);
3169 return block->host + (addr - block->offset);
3173 fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr);
3179 /* Return a host pointer to guest's ram. Similar to qemu_get_ram_ptr
3180 * but takes a size argument */
3181 void *qemu_ram_ptr_length(ram_addr_t addr, ram_addr_t *size)
3186 if (xen_enabled()) {
3187 return xen_map_cache(addr, *size, 1);
3191 QLIST_FOREACH(block, &ram_list.blocks, next) {
3192 if (addr - block->offset < block->length) {
3193 if (addr - block->offset + *size > block->length)
3194 *size = block->length - addr + block->offset;
3195 return block->host + (addr - block->offset);
3199 fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr);
3204 void qemu_put_ram_ptr(void *addr)
3206 trace_qemu_put_ram_ptr(addr);
3209 int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr)
3212 uint8_t *host = ptr;
3214 if (xen_enabled()) {
3215 *ram_addr = xen_ram_addr_from_mapcache(ptr);
3219 QLIST_FOREACH(block, &ram_list.blocks, next) {
3220 /* This case append when the block is not mapped. */
3221 if (block->host == NULL) {
3224 if (host - block->host < block->length) {
3225 *ram_addr = block->offset + (host - block->host);
3233 /* Some of the softmmu routines need to translate from a host pointer
3234 (typically a TLB entry) back to a ram offset. */
3235 ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr)
3237 ram_addr_t ram_addr;
3239 if (qemu_ram_addr_from_host(ptr, &ram_addr)) {
3240 fprintf(stderr, "Bad ram pointer %p\n", ptr);
3246 static uint32_t unassigned_mem_readb(void *opaque, target_phys_addr_t addr)
3248 #ifdef DEBUG_UNASSIGNED
3249 printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
3251 #if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
3252 cpu_unassigned_access(cpu_single_env, addr, 0, 0, 0, 1);
3257 static uint32_t unassigned_mem_readw(void *opaque, target_phys_addr_t addr)
3259 #ifdef DEBUG_UNASSIGNED
3260 printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
3262 #if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
3263 cpu_unassigned_access(cpu_single_env, addr, 0, 0, 0, 2);
3268 static uint32_t unassigned_mem_readl(void *opaque, target_phys_addr_t addr)
3270 #ifdef DEBUG_UNASSIGNED
3271 printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
3273 #if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
3274 cpu_unassigned_access(cpu_single_env, addr, 0, 0, 0, 4);
3279 static void unassigned_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
3281 #ifdef DEBUG_UNASSIGNED
3282 printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val);
3284 #if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
3285 cpu_unassigned_access(cpu_single_env, addr, 1, 0, 0, 1);
3289 static void unassigned_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
3291 #ifdef DEBUG_UNASSIGNED
3292 printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val);
3294 #if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
3295 cpu_unassigned_access(cpu_single_env, addr, 1, 0, 0, 2);
3299 static void unassigned_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
3301 #ifdef DEBUG_UNASSIGNED
3302 printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val);
3304 #if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
3305 cpu_unassigned_access(cpu_single_env, addr, 1, 0, 0, 4);
3309 static CPUReadMemoryFunc * const unassigned_mem_read[3] = {
3310 unassigned_mem_readb,
3311 unassigned_mem_readw,
3312 unassigned_mem_readl,
3315 static CPUWriteMemoryFunc * const unassigned_mem_write[3] = {
3316 unassigned_mem_writeb,
3317 unassigned_mem_writew,
3318 unassigned_mem_writel,
3321 static void notdirty_mem_writeb(void *opaque, target_phys_addr_t ram_addr,
3325 dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr);
3326 if (!(dirty_flags & CODE_DIRTY_FLAG)) {
3327 #if !defined(CONFIG_USER_ONLY)
3328 tb_invalidate_phys_page_fast(ram_addr, 1);
3329 dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr);
3332 stb_p(qemu_get_ram_ptr(ram_addr), val);
3333 dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
3334 cpu_physical_memory_set_dirty_flags(ram_addr, dirty_flags);
3335 /* we remove the notdirty callback only if the code has been
3337 if (dirty_flags == 0xff)
3338 tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr);
3341 static void notdirty_mem_writew(void *opaque, target_phys_addr_t ram_addr,
3345 dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr);
3346 if (!(dirty_flags & CODE_DIRTY_FLAG)) {
3347 #if !defined(CONFIG_USER_ONLY)
3348 tb_invalidate_phys_page_fast(ram_addr, 2);
3349 dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr);
3352 stw_p(qemu_get_ram_ptr(ram_addr), val);
3353 dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
3354 cpu_physical_memory_set_dirty_flags(ram_addr, dirty_flags);
3355 /* we remove the notdirty callback only if the code has been
3357 if (dirty_flags == 0xff)
3358 tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr);
3361 static void notdirty_mem_writel(void *opaque, target_phys_addr_t ram_addr,
3365 dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr);
3366 if (!(dirty_flags & CODE_DIRTY_FLAG)) {
3367 #if !defined(CONFIG_USER_ONLY)
3368 tb_invalidate_phys_page_fast(ram_addr, 4);
3369 dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr);
3372 stl_p(qemu_get_ram_ptr(ram_addr), val);
3373 dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
3374 cpu_physical_memory_set_dirty_flags(ram_addr, dirty_flags);
3375 /* we remove the notdirty callback only if the code has been
3377 if (dirty_flags == 0xff)
3378 tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr);
3381 static CPUReadMemoryFunc * const error_mem_read[3] = {
3382 NULL, /* never used */
3383 NULL, /* never used */
3384 NULL, /* never used */
3387 static CPUWriteMemoryFunc * const notdirty_mem_write[3] = {
3388 notdirty_mem_writeb,
3389 notdirty_mem_writew,
3390 notdirty_mem_writel,
3393 /* Generate a debug exception if a watchpoint has been hit. */
3394 static void check_watchpoint(int offset, int len_mask, int flags)
3396 CPUState *env = cpu_single_env;
3397 target_ulong pc, cs_base;
3398 TranslationBlock *tb;
3403 if (env->watchpoint_hit) {
3404 /* We re-entered the check after replacing the TB. Now raise
3405 * the debug interrupt so that is will trigger after the
3406 * current instruction. */
3407 cpu_interrupt(env, CPU_INTERRUPT_DEBUG);
3410 vaddr = (env->mem_io_vaddr & TARGET_PAGE_MASK) + offset;
3411 QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
3412 if ((vaddr == (wp->vaddr & len_mask) ||
3413 (vaddr & wp->len_mask) == wp->vaddr) && (wp->flags & flags)) {
3414 wp->flags |= BP_WATCHPOINT_HIT;
3415 if (!env->watchpoint_hit) {
3416 env->watchpoint_hit = wp;
3417 tb = tb_find_pc(env->mem_io_pc);
3419 cpu_abort(env, "check_watchpoint: could not find TB for "
3420 "pc=%p", (void *)env->mem_io_pc);
3422 cpu_restore_state(tb, env, env->mem_io_pc);
3423 tb_phys_invalidate(tb, -1);
3424 if (wp->flags & BP_STOP_BEFORE_ACCESS) {
3425 env->exception_index = EXCP_DEBUG;
3427 cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags);
3428 tb_gen_code(env, pc, cs_base, cpu_flags, 1);
3430 cpu_resume_from_signal(env, NULL);
3433 wp->flags &= ~BP_WATCHPOINT_HIT;
3438 /* Watchpoint access routines. Watchpoints are inserted using TLB tricks,
3439 so these check for a hit then pass through to the normal out-of-line
3441 static uint32_t watch_mem_readb(void *opaque, target_phys_addr_t addr)
3443 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x0, BP_MEM_READ);
3444 return ldub_phys(addr);
3447 static uint32_t watch_mem_readw(void *opaque, target_phys_addr_t addr)
3449 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x1, BP_MEM_READ);
3450 return lduw_phys(addr);
3453 static uint32_t watch_mem_readl(void *opaque, target_phys_addr_t addr)
3455 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x3, BP_MEM_READ);
3456 return ldl_phys(addr);
3459 static void watch_mem_writeb(void *opaque, target_phys_addr_t addr,
3462 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x0, BP_MEM_WRITE);
3463 stb_phys(addr, val);
3466 static void watch_mem_writew(void *opaque, target_phys_addr_t addr,
3469 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x1, BP_MEM_WRITE);
3470 stw_phys(addr, val);
3473 static void watch_mem_writel(void *opaque, target_phys_addr_t addr,
3476 check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x3, BP_MEM_WRITE);
3477 stl_phys(addr, val);
3480 static CPUReadMemoryFunc * const watch_mem_read[3] = {
3486 static CPUWriteMemoryFunc * const watch_mem_write[3] = {
3492 static inline uint32_t subpage_readlen (subpage_t *mmio,
3493 target_phys_addr_t addr,
3496 unsigned int idx = SUBPAGE_IDX(addr);
3497 #if defined(DEBUG_SUBPAGE)
3498 printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__,
3499 mmio, len, addr, idx);
3502 addr += mmio->region_offset[idx];
3503 idx = mmio->sub_io_index[idx];
3504 return io_mem_read[idx][len](io_mem_opaque[idx], addr);
3507 static inline void subpage_writelen (subpage_t *mmio, target_phys_addr_t addr,
3508 uint32_t value, unsigned int len)
3510 unsigned int idx = SUBPAGE_IDX(addr);
3511 #if defined(DEBUG_SUBPAGE)
3512 printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d value %08x\n",
3513 __func__, mmio, len, addr, idx, value);
3516 addr += mmio->region_offset[idx];
3517 idx = mmio->sub_io_index[idx];
3518 io_mem_write[idx][len](io_mem_opaque[idx], addr, value);
3521 static uint32_t subpage_readb (void *opaque, target_phys_addr_t addr)
3523 return subpage_readlen(opaque, addr, 0);
3526 static void subpage_writeb (void *opaque, target_phys_addr_t addr,
3529 subpage_writelen(opaque, addr, value, 0);
3532 static uint32_t subpage_readw (void *opaque, target_phys_addr_t addr)
3534 return subpage_readlen(opaque, addr, 1);
3537 static void subpage_writew (void *opaque, target_phys_addr_t addr,
3540 subpage_writelen(opaque, addr, value, 1);
3543 static uint32_t subpage_readl (void *opaque, target_phys_addr_t addr)
3545 return subpage_readlen(opaque, addr, 2);
3548 static void subpage_writel (void *opaque, target_phys_addr_t addr,
3551 subpage_writelen(opaque, addr, value, 2);
3554 static CPUReadMemoryFunc * const subpage_read[] = {
3560 static CPUWriteMemoryFunc * const subpage_write[] = {
3566 static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
3567 ram_addr_t memory, ram_addr_t region_offset)
3571 if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE)
3573 idx = SUBPAGE_IDX(start);
3574 eidx = SUBPAGE_IDX(end);
3575 #if defined(DEBUG_SUBPAGE)
3576 printf("%s: %p start %08x end %08x idx %08x eidx %08x mem %ld\n", __func__,
3577 mmio, start, end, idx, eidx, memory);
3579 if ((memory & ~TARGET_PAGE_MASK) == IO_MEM_RAM)
3580 memory = IO_MEM_UNASSIGNED;
3581 memory = (memory >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
3582 for (; idx <= eidx; idx++) {
3583 mmio->sub_io_index[idx] = memory;
3584 mmio->region_offset[idx] = region_offset;
3590 static subpage_t *subpage_init (target_phys_addr_t base, ram_addr_t *phys,
3591 ram_addr_t orig_memory,
3592 ram_addr_t region_offset)
3597 mmio = g_malloc0(sizeof(subpage_t));
3600 subpage_memory = cpu_register_io_memory(subpage_read, subpage_write, mmio,
3601 DEVICE_NATIVE_ENDIAN);
3602 #if defined(DEBUG_SUBPAGE)
3603 printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__,
3604 mmio, base, TARGET_PAGE_SIZE, subpage_memory);
3606 *phys = subpage_memory | IO_MEM_SUBPAGE;
3607 subpage_register(mmio, 0, TARGET_PAGE_SIZE-1, orig_memory, region_offset);
3612 static int get_free_io_mem_idx(void)
3616 for (i = 0; i<IO_MEM_NB_ENTRIES; i++)
3617 if (!io_mem_used[i]) {
3621 fprintf(stderr, "RAN out out io_mem_idx, max %d !\n", IO_MEM_NB_ENTRIES);
3626 * Usually, devices operate in little endian mode. There are devices out
3627 * there that operate in big endian too. Each device gets byte swapped
3628 * mmio if plugged onto a CPU that does the other endianness.
3638 typedef struct SwapEndianContainer {
3639 CPUReadMemoryFunc *read[3];
3640 CPUWriteMemoryFunc *write[3];
3642 } SwapEndianContainer;
3644 static uint32_t swapendian_mem_readb (void *opaque, target_phys_addr_t addr)
3647 SwapEndianContainer *c = opaque;
3648 val = c->read[0](c->opaque, addr);
3652 static uint32_t swapendian_mem_readw(void *opaque, target_phys_addr_t addr)
3655 SwapEndianContainer *c = opaque;
3656 val = bswap16(c->read[1](c->opaque, addr));
3660 static uint32_t swapendian_mem_readl(void *opaque, target_phys_addr_t addr)
3663 SwapEndianContainer *c = opaque;
3664 val = bswap32(c->read[2](c->opaque, addr));
3668 static CPUReadMemoryFunc * const swapendian_readfn[3]={
3669 swapendian_mem_readb,
3670 swapendian_mem_readw,
3671 swapendian_mem_readl
3674 static void swapendian_mem_writeb(void *opaque, target_phys_addr_t addr,
3677 SwapEndianContainer *c = opaque;
3678 c->write[0](c->opaque, addr, val);
3681 static void swapendian_mem_writew(void *opaque, target_phys_addr_t addr,
3684 SwapEndianContainer *c = opaque;
3685 c->write[1](c->opaque, addr, bswap16(val));
3688 static void swapendian_mem_writel(void *opaque, target_phys_addr_t addr,
3691 SwapEndianContainer *c = opaque;
3692 c->write[2](c->opaque, addr, bswap32(val));
3695 static CPUWriteMemoryFunc * const swapendian_writefn[3]={
3696 swapendian_mem_writeb,
3697 swapendian_mem_writew,
3698 swapendian_mem_writel
3701 static void swapendian_init(int io_index)
3703 SwapEndianContainer *c = g_malloc(sizeof(SwapEndianContainer));
3706 /* Swap mmio for big endian targets */
3707 c->opaque = io_mem_opaque[io_index];
3708 for (i = 0; i < 3; i++) {
3709 c->read[i] = io_mem_read[io_index][i];
3710 c->write[i] = io_mem_write[io_index][i];
3712 io_mem_read[io_index][i] = swapendian_readfn[i];
3713 io_mem_write[io_index][i] = swapendian_writefn[i];
3715 io_mem_opaque[io_index] = c;
3718 static void swapendian_del(int io_index)
3720 if (io_mem_read[io_index][0] == swapendian_readfn[0]) {
3721 g_free(io_mem_opaque[io_index]);
3725 /* mem_read and mem_write are arrays of functions containing the
3726 function to access byte (index 0), word (index 1) and dword (index
3727 2). Functions can be omitted with a NULL function pointer.
3728 If io_index is non zero, the corresponding io zone is
3729 modified. If it is zero, a new io zone is allocated. The return
3730 value can be used with cpu_register_physical_memory(). (-1) is
3731 returned if error. */
3732 static int cpu_register_io_memory_fixed(int io_index,
3733 CPUReadMemoryFunc * const *mem_read,
3734 CPUWriteMemoryFunc * const *mem_write,
3735 void *opaque, enum device_endian endian)
3739 if (io_index <= 0) {
3740 io_index = get_free_io_mem_idx();
3744 io_index >>= IO_MEM_SHIFT;
3745 if (io_index >= IO_MEM_NB_ENTRIES)
3749 for (i = 0; i < 3; ++i) {
3750 io_mem_read[io_index][i]
3751 = (mem_read[i] ? mem_read[i] : unassigned_mem_read[i]);
3753 for (i = 0; i < 3; ++i) {
3754 io_mem_write[io_index][i]
3755 = (mem_write[i] ? mem_write[i] : unassigned_mem_write[i]);
3757 io_mem_opaque[io_index] = opaque;
3760 case DEVICE_BIG_ENDIAN:
3761 #ifndef TARGET_WORDS_BIGENDIAN
3762 swapendian_init(io_index);
3765 case DEVICE_LITTLE_ENDIAN:
3766 #ifdef TARGET_WORDS_BIGENDIAN
3767 swapendian_init(io_index);
3770 case DEVICE_NATIVE_ENDIAN:
3775 return (io_index << IO_MEM_SHIFT);
3778 int cpu_register_io_memory(CPUReadMemoryFunc * const *mem_read,
3779 CPUWriteMemoryFunc * const *mem_write,
3780 void *opaque, enum device_endian endian)
3782 return cpu_register_io_memory_fixed(0, mem_read, mem_write, opaque, endian);
3785 void cpu_unregister_io_memory(int io_table_address)
3788 int io_index = io_table_address >> IO_MEM_SHIFT;
3790 swapendian_del(io_index);
3792 for (i=0;i < 3; i++) {
3793 io_mem_read[io_index][i] = unassigned_mem_read[i];
3794 io_mem_write[io_index][i] = unassigned_mem_write[i];
3796 io_mem_opaque[io_index] = NULL;
3797 io_mem_used[io_index] = 0;
3800 static void io_mem_init(void)
3804 cpu_register_io_memory_fixed(IO_MEM_ROM, error_mem_read,
3805 unassigned_mem_write, NULL,
3806 DEVICE_NATIVE_ENDIAN);
3807 cpu_register_io_memory_fixed(IO_MEM_UNASSIGNED, unassigned_mem_read,
3808 unassigned_mem_write, NULL,
3809 DEVICE_NATIVE_ENDIAN);
3810 cpu_register_io_memory_fixed(IO_MEM_NOTDIRTY, error_mem_read,
3811 notdirty_mem_write, NULL,
3812 DEVICE_NATIVE_ENDIAN);
3816 io_mem_watch = cpu_register_io_memory(watch_mem_read,
3817 watch_mem_write, NULL,
3818 DEVICE_NATIVE_ENDIAN);
3821 static void memory_map_init(void)
3823 system_memory = g_malloc(sizeof(*system_memory));
3824 memory_region_init(system_memory, "system", INT64_MAX);
3825 set_system_memory_map(system_memory);
3827 system_io = g_malloc(sizeof(*system_io));
3828 memory_region_init(system_io, "io", 65536);
3829 set_system_io_map(system_io);
3832 MemoryRegion *get_system_memory(void)
3834 return system_memory;
3837 MemoryRegion *get_system_io(void)
3842 #endif /* !defined(CONFIG_USER_ONLY) */
3844 /* physical memory access (slow version, mainly for debug) */
3845 #if defined(CONFIG_USER_ONLY)
3846 int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
3847 uint8_t *buf, int len, int is_write)
3854 page = addr & TARGET_PAGE_MASK;
3855 l = (page + TARGET_PAGE_SIZE) - addr;
3858 flags = page_get_flags(page);
3859 if (!(flags & PAGE_VALID))
3862 if (!(flags & PAGE_WRITE))
3864 /* XXX: this code should not depend on lock_user */
3865 if (!(p = lock_user(VERIFY_WRITE, addr, l, 0)))
3868 unlock_user(p, addr, l);
3870 if (!(flags & PAGE_READ))
3872 /* XXX: this code should not depend on lock_user */
3873 if (!(p = lock_user(VERIFY_READ, addr, l, 1)))
3876 unlock_user(p, addr, 0);
3886 void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
3887 int len, int is_write)
3892 target_phys_addr_t page;
3897 page = addr & TARGET_PAGE_MASK;
3898 l = (page + TARGET_PAGE_SIZE) - addr;
3901 p = phys_page_find(page >> TARGET_PAGE_BITS);
3903 pd = IO_MEM_UNASSIGNED;
3905 pd = p->phys_offset;
3909 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
3910 target_phys_addr_t addr1 = addr;
3911 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
3913 addr1 = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
3914 /* XXX: could force cpu_single_env to NULL to avoid
3916 if (l >= 4 && ((addr1 & 3) == 0)) {
3917 /* 32 bit write access */
3919 io_mem_write[io_index][2](io_mem_opaque[io_index], addr1, val);
3921 } else if (l >= 2 && ((addr1 & 1) == 0)) {
3922 /* 16 bit write access */
3924 io_mem_write[io_index][1](io_mem_opaque[io_index], addr1, val);
3927 /* 8 bit write access */
3929 io_mem_write[io_index][0](io_mem_opaque[io_index], addr1, val);
3934 addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
3936 ptr = qemu_get_ram_ptr(addr1);
3937 memcpy(ptr, buf, l);
3938 if (!cpu_physical_memory_is_dirty(addr1)) {
3939 /* invalidate code */
3940 tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
3942 cpu_physical_memory_set_dirty_flags(
3943 addr1, (0xff & ~CODE_DIRTY_FLAG));
3945 qemu_put_ram_ptr(ptr);
3948 if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
3949 !(pd & IO_MEM_ROMD)) {
3950 target_phys_addr_t addr1 = addr;
3952 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
3954 addr1 = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
3955 if (l >= 4 && ((addr1 & 3) == 0)) {
3956 /* 32 bit read access */
3957 val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr1);
3960 } else if (l >= 2 && ((addr1 & 1) == 0)) {
3961 /* 16 bit read access */
3962 val = io_mem_read[io_index][1](io_mem_opaque[io_index], addr1);
3966 /* 8 bit read access */
3967 val = io_mem_read[io_index][0](io_mem_opaque[io_index], addr1);
3973 ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK);
3974 memcpy(buf, ptr + (addr & ~TARGET_PAGE_MASK), l);
3975 qemu_put_ram_ptr(ptr);
3984 /* used for ROM loading : can write in RAM and ROM */
3985 void cpu_physical_memory_write_rom(target_phys_addr_t addr,
3986 const uint8_t *buf, int len)
3990 target_phys_addr_t page;
3995 page = addr & TARGET_PAGE_MASK;
3996 l = (page + TARGET_PAGE_SIZE) - addr;
3999 p = phys_page_find(page >> TARGET_PAGE_BITS);
4001 pd = IO_MEM_UNASSIGNED;
4003 pd = p->phys_offset;
4006 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM &&
4007 (pd & ~TARGET_PAGE_MASK) != IO_MEM_ROM &&
4008 !(pd & IO_MEM_ROMD)) {
4011 unsigned long addr1;
4012 addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
4014 ptr = qemu_get_ram_ptr(addr1);
4015 memcpy(ptr, buf, l);
4016 qemu_put_ram_ptr(ptr);
4026 target_phys_addr_t addr;
4027 target_phys_addr_t len;
4030 static BounceBuffer bounce;
4032 typedef struct MapClient {
4034 void (*callback)(void *opaque);
4035 QLIST_ENTRY(MapClient) link;
4038 static QLIST_HEAD(map_client_list, MapClient) map_client_list
4039 = QLIST_HEAD_INITIALIZER(map_client_list);
4041 void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque))
4043 MapClient *client = g_malloc(sizeof(*client));
4045 client->opaque = opaque;
4046 client->callback = callback;
4047 QLIST_INSERT_HEAD(&map_client_list, client, link);
4051 void cpu_unregister_map_client(void *_client)
4053 MapClient *client = (MapClient *)_client;
4055 QLIST_REMOVE(client, link);
4059 static void cpu_notify_map_clients(void)
4063 while (!QLIST_EMPTY(&map_client_list)) {
4064 client = QLIST_FIRST(&map_client_list);
4065 client->callback(client->opaque);
4066 cpu_unregister_map_client(client);
4070 /* Map a physical memory region into a host virtual address.
4071 * May map a subset of the requested range, given by and returned in *plen.
4072 * May return NULL if resources needed to perform the mapping are exhausted.
4073 * Use only for reads OR writes - not for read-modify-write operations.
4074 * Use cpu_register_map_client() to know when retrying the map operation is
4075 * likely to succeed.
4077 void *cpu_physical_memory_map(target_phys_addr_t addr,
4078 target_phys_addr_t *plen,
4081 target_phys_addr_t len = *plen;
4082 target_phys_addr_t todo = 0;
4084 target_phys_addr_t page;
4087 ram_addr_t raddr = RAM_ADDR_MAX;
4092 page = addr & TARGET_PAGE_MASK;
4093 l = (page + TARGET_PAGE_SIZE) - addr;
4096 p = phys_page_find(page >> TARGET_PAGE_BITS);
4098 pd = IO_MEM_UNASSIGNED;
4100 pd = p->phys_offset;
4103 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
4104 if (todo || bounce.buffer) {
4107 bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, TARGET_PAGE_SIZE);
4111 cpu_physical_memory_read(addr, bounce.buffer, l);
4115 return bounce.buffer;
4118 raddr = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
4126 ret = qemu_ram_ptr_length(raddr, &rlen);
4131 /* Unmaps a memory region previously mapped by cpu_physical_memory_map().
4132 * Will also mark the memory as dirty if is_write == 1. access_len gives
4133 * the amount of memory that was actually read or written by the caller.
4135 void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len,
4136 int is_write, target_phys_addr_t access_len)
4138 if (buffer != bounce.buffer) {
4140 ram_addr_t addr1 = qemu_ram_addr_from_host_nofail(buffer);
4141 while (access_len) {
4143 l = TARGET_PAGE_SIZE;
4146 if (!cpu_physical_memory_is_dirty(addr1)) {
4147 /* invalidate code */
4148 tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
4150 cpu_physical_memory_set_dirty_flags(
4151 addr1, (0xff & ~CODE_DIRTY_FLAG));
4157 if (xen_enabled()) {
4158 xen_invalidate_map_cache_entry(buffer);
4163 cpu_physical_memory_write(bounce.addr, bounce.buffer, access_len);
4165 qemu_vfree(bounce.buffer);
4166 bounce.buffer = NULL;
4167 cpu_notify_map_clients();
4170 /* warning: addr must be aligned */
4171 static inline uint32_t ldl_phys_internal(target_phys_addr_t addr,
4172 enum device_endian endian)
4180 p = phys_page_find(addr >> TARGET_PAGE_BITS);
4182 pd = IO_MEM_UNASSIGNED;
4184 pd = p->phys_offset;
4187 if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
4188 !(pd & IO_MEM_ROMD)) {
4190 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
4192 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
4193 val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
4194 #if defined(TARGET_WORDS_BIGENDIAN)
4195 if (endian == DEVICE_LITTLE_ENDIAN) {
4199 if (endian == DEVICE_BIG_ENDIAN) {
4205 ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) +
4206 (addr & ~TARGET_PAGE_MASK);
4208 case DEVICE_LITTLE_ENDIAN:
4209 val = ldl_le_p(ptr);
4211 case DEVICE_BIG_ENDIAN:
4212 val = ldl_be_p(ptr);
4222 uint32_t ldl_phys(target_phys_addr_t addr)
4224 return ldl_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
4227 uint32_t ldl_le_phys(target_phys_addr_t addr)
4229 return ldl_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
4232 uint32_t ldl_be_phys(target_phys_addr_t addr)
4234 return ldl_phys_internal(addr, DEVICE_BIG_ENDIAN);
4237 /* warning: addr must be aligned */
4238 static inline uint64_t ldq_phys_internal(target_phys_addr_t addr,
4239 enum device_endian endian)
4247 p = phys_page_find(addr >> TARGET_PAGE_BITS);
4249 pd = IO_MEM_UNASSIGNED;
4251 pd = p->phys_offset;
4254 if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
4255 !(pd & IO_MEM_ROMD)) {
4257 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
4259 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
4261 /* XXX This is broken when device endian != cpu endian.
4262 Fix and add "endian" variable check */
4263 #ifdef TARGET_WORDS_BIGENDIAN
4264 val = (uint64_t)io_mem_read[io_index][2](io_mem_opaque[io_index], addr) << 32;
4265 val |= io_mem_read[io_index][2](io_mem_opaque[io_index], addr + 4);
4267 val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
4268 val |= (uint64_t)io_mem_read[io_index][2](io_mem_opaque[io_index], addr + 4) << 32;
4272 ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) +
4273 (addr & ~TARGET_PAGE_MASK);
4275 case DEVICE_LITTLE_ENDIAN:
4276 val = ldq_le_p(ptr);
4278 case DEVICE_BIG_ENDIAN:
4279 val = ldq_be_p(ptr);
4289 uint64_t ldq_phys(target_phys_addr_t addr)
4291 return ldq_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
4294 uint64_t ldq_le_phys(target_phys_addr_t addr)
4296 return ldq_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
4299 uint64_t ldq_be_phys(target_phys_addr_t addr)
4301 return ldq_phys_internal(addr, DEVICE_BIG_ENDIAN);
4305 uint32_t ldub_phys(target_phys_addr_t addr)
4308 cpu_physical_memory_read(addr, &val, 1);
4312 /* warning: addr must be aligned */
4313 static inline uint32_t lduw_phys_internal(target_phys_addr_t addr,
4314 enum device_endian endian)
4322 p = phys_page_find(addr >> TARGET_PAGE_BITS);
4324 pd = IO_MEM_UNASSIGNED;
4326 pd = p->phys_offset;
4329 if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
4330 !(pd & IO_MEM_ROMD)) {
4332 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
4334 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
4335 val = io_mem_read[io_index][1](io_mem_opaque[io_index], addr);
4336 #if defined(TARGET_WORDS_BIGENDIAN)
4337 if (endian == DEVICE_LITTLE_ENDIAN) {
4341 if (endian == DEVICE_BIG_ENDIAN) {
4347 ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) +
4348 (addr & ~TARGET_PAGE_MASK);
4350 case DEVICE_LITTLE_ENDIAN:
4351 val = lduw_le_p(ptr);
4353 case DEVICE_BIG_ENDIAN:
4354 val = lduw_be_p(ptr);
4364 uint32_t lduw_phys(target_phys_addr_t addr)
4366 return lduw_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
4369 uint32_t lduw_le_phys(target_phys_addr_t addr)
4371 return lduw_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
4374 uint32_t lduw_be_phys(target_phys_addr_t addr)
4376 return lduw_phys_internal(addr, DEVICE_BIG_ENDIAN);
4379 /* warning: addr must be aligned. The ram page is not masked as dirty
4380 and the code inside is not invalidated. It is useful if the dirty
4381 bits are used to track modified PTEs */
4382 void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
4389 p = phys_page_find(addr >> TARGET_PAGE_BITS);
4391 pd = IO_MEM_UNASSIGNED;
4393 pd = p->phys_offset;
4396 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
4397 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
4399 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
4400 io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
4402 unsigned long addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
4403 ptr = qemu_get_ram_ptr(addr1);
4406 if (unlikely(in_migration)) {
4407 if (!cpu_physical_memory_is_dirty(addr1)) {
4408 /* invalidate code */
4409 tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
4411 cpu_physical_memory_set_dirty_flags(
4412 addr1, (0xff & ~CODE_DIRTY_FLAG));
4418 void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val)
4425 p = phys_page_find(addr >> TARGET_PAGE_BITS);
4427 pd = IO_MEM_UNASSIGNED;
4429 pd = p->phys_offset;
4432 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
4433 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
4435 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
4436 #ifdef TARGET_WORDS_BIGENDIAN
4437 io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val >> 32);
4438 io_mem_write[io_index][2](io_mem_opaque[io_index], addr + 4, val);
4440 io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
4441 io_mem_write[io_index][2](io_mem_opaque[io_index], addr + 4, val >> 32);
4444 ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) +
4445 (addr & ~TARGET_PAGE_MASK);
4450 /* warning: addr must be aligned */
4451 static inline void stl_phys_internal(target_phys_addr_t addr, uint32_t val,
4452 enum device_endian endian)
4459 p = phys_page_find(addr >> TARGET_PAGE_BITS);
4461 pd = IO_MEM_UNASSIGNED;
4463 pd = p->phys_offset;
4466 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
4467 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
4469 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
4470 #if defined(TARGET_WORDS_BIGENDIAN)
4471 if (endian == DEVICE_LITTLE_ENDIAN) {
4475 if (endian == DEVICE_BIG_ENDIAN) {
4479 io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
4481 unsigned long addr1;
4482 addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
4484 ptr = qemu_get_ram_ptr(addr1);
4486 case DEVICE_LITTLE_ENDIAN:
4489 case DEVICE_BIG_ENDIAN:
4496 if (!cpu_physical_memory_is_dirty(addr1)) {
4497 /* invalidate code */
4498 tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
4500 cpu_physical_memory_set_dirty_flags(addr1,
4501 (0xff & ~CODE_DIRTY_FLAG));
4506 void stl_phys(target_phys_addr_t addr, uint32_t val)
4508 stl_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN);
4511 void stl_le_phys(target_phys_addr_t addr, uint32_t val)
4513 stl_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN);
4516 void stl_be_phys(target_phys_addr_t addr, uint32_t val)
4518 stl_phys_internal(addr, val, DEVICE_BIG_ENDIAN);
4522 void stb_phys(target_phys_addr_t addr, uint32_t val)
4525 cpu_physical_memory_write(addr, &v, 1);
4528 /* warning: addr must be aligned */
4529 static inline void stw_phys_internal(target_phys_addr_t addr, uint32_t val,
4530 enum device_endian endian)
4537 p = phys_page_find(addr >> TARGET_PAGE_BITS);
4539 pd = IO_MEM_UNASSIGNED;
4541 pd = p->phys_offset;
4544 if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
4545 io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
4547 addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
4548 #if defined(TARGET_WORDS_BIGENDIAN)
4549 if (endian == DEVICE_LITTLE_ENDIAN) {
4553 if (endian == DEVICE_BIG_ENDIAN) {
4557 io_mem_write[io_index][1](io_mem_opaque[io_index], addr, val);
4559 unsigned long addr1;
4560 addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
4562 ptr = qemu_get_ram_ptr(addr1);
4564 case DEVICE_LITTLE_ENDIAN:
4567 case DEVICE_BIG_ENDIAN:
4574 if (!cpu_physical_memory_is_dirty(addr1)) {
4575 /* invalidate code */
4576 tb_invalidate_phys_page_range(addr1, addr1 + 2, 0);
4578 cpu_physical_memory_set_dirty_flags(addr1,
4579 (0xff & ~CODE_DIRTY_FLAG));
4584 void stw_phys(target_phys_addr_t addr, uint32_t val)
4586 stw_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN);
4589 void stw_le_phys(target_phys_addr_t addr, uint32_t val)
4591 stw_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN);
4594 void stw_be_phys(target_phys_addr_t addr, uint32_t val)
4596 stw_phys_internal(addr, val, DEVICE_BIG_ENDIAN);
4600 void stq_phys(target_phys_addr_t addr, uint64_t val)
4603 cpu_physical_memory_write(addr, &val, 8);
4606 void stq_le_phys(target_phys_addr_t addr, uint64_t val)
4608 val = cpu_to_le64(val);
4609 cpu_physical_memory_write(addr, &val, 8);
4612 void stq_be_phys(target_phys_addr_t addr, uint64_t val)
4614 val = cpu_to_be64(val);
4615 cpu_physical_memory_write(addr, &val, 8);
4618 /* virtual memory access for debug (includes writing to ROM) */
4619 int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
4620 uint8_t *buf, int len, int is_write)
4623 target_phys_addr_t phys_addr;
4627 page = addr & TARGET_PAGE_MASK;
4628 phys_addr = cpu_get_phys_page_debug(env, page);
4629 /* if no physical page mapped, return an error */
4630 if (phys_addr == -1)
4632 l = (page + TARGET_PAGE_SIZE) - addr;
4635 phys_addr += (addr & ~TARGET_PAGE_MASK);
4637 cpu_physical_memory_write_rom(phys_addr, buf, l);
4639 cpu_physical_memory_rw(phys_addr, buf, l, is_write);
4648 /* in deterministic execution mode, instructions doing device I/Os
4649 must be at the end of the TB */
4650 void cpu_io_recompile(CPUState *env, void *retaddr)
4652 TranslationBlock *tb;
4654 target_ulong pc, cs_base;
4657 tb = tb_find_pc((unsigned long)retaddr);
4659 cpu_abort(env, "cpu_io_recompile: could not find TB for pc=%p",
4662 n = env->icount_decr.u16.low + tb->icount;
4663 cpu_restore_state(tb, env, (unsigned long)retaddr);
4664 /* Calculate how many instructions had been executed before the fault
4666 n = n - env->icount_decr.u16.low;
4667 /* Generate a new TB ending on the I/O insn. */
4669 /* On MIPS and SH, delay slot instructions can only be restarted if
4670 they were already the first instruction in the TB. If this is not
4671 the first instruction in a TB then re-execute the preceding
4673 #if defined(TARGET_MIPS)
4674 if ((env->hflags & MIPS_HFLAG_BMASK) != 0 && n > 1) {
4675 env->active_tc.PC -= 4;
4676 env->icount_decr.u16.low++;
4677 env->hflags &= ~MIPS_HFLAG_BMASK;
4679 #elif defined(TARGET_SH4)
4680 if ((env->flags & ((DELAY_SLOT | DELAY_SLOT_CONDITIONAL))) != 0
4683 env->icount_decr.u16.low++;
4684 env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL);
4687 /* This should never happen. */
4688 if (n > CF_COUNT_MASK)
4689 cpu_abort(env, "TB too big during recompile");
4691 cflags = n | CF_LAST_IO;
4693 cs_base = tb->cs_base;
4695 tb_phys_invalidate(tb, -1);
4696 /* FIXME: In theory this could raise an exception. In practice
4697 we have already translated the block once so it's probably ok. */
4698 tb_gen_code(env, pc, cs_base, flags, cflags);
4699 /* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not
4700 the first in the TB) then we end up generating a whole new TB and
4701 repeating the fault, which is horribly inefficient.
4702 Better would be to execute just this insn uncached, or generate a
4704 cpu_resume_from_signal(env, NULL);
4707 #if !defined(CONFIG_USER_ONLY)
4709 void dump_exec_info(FILE *f, fprintf_function cpu_fprintf)
4711 int i, target_code_size, max_target_code_size;
4712 int direct_jmp_count, direct_jmp2_count, cross_page;
4713 TranslationBlock *tb;
4715 target_code_size = 0;
4716 max_target_code_size = 0;
4718 direct_jmp_count = 0;
4719 direct_jmp2_count = 0;
4720 for(i = 0; i < nb_tbs; i++) {
4722 target_code_size += tb->size;
4723 if (tb->size > max_target_code_size)
4724 max_target_code_size = tb->size;
4725 if (tb->page_addr[1] != -1)
4727 if (tb->tb_next_offset[0] != 0xffff) {
4729 if (tb->tb_next_offset[1] != 0xffff) {
4730 direct_jmp2_count++;
4734 /* XXX: avoid using doubles ? */
4735 cpu_fprintf(f, "Translation buffer state:\n");
4736 cpu_fprintf(f, "gen code size %td/%ld\n",
4737 code_gen_ptr - code_gen_buffer, code_gen_buffer_max_size);
4738 cpu_fprintf(f, "TB count %d/%d\n",
4739 nb_tbs, code_gen_max_blocks);
4740 cpu_fprintf(f, "TB avg target size %d max=%d bytes\n",
4741 nb_tbs ? target_code_size / nb_tbs : 0,
4742 max_target_code_size);
4743 cpu_fprintf(f, "TB avg host size %td bytes (expansion ratio: %0.1f)\n",
4744 nb_tbs ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0,
4745 target_code_size ? (double) (code_gen_ptr - code_gen_buffer) / target_code_size : 0);
4746 cpu_fprintf(f, "cross page TB count %d (%d%%)\n",
4748 nb_tbs ? (cross_page * 100) / nb_tbs : 0);
4749 cpu_fprintf(f, "direct jump count %d (%d%%) (2 jumps=%d %d%%)\n",
4751 nb_tbs ? (direct_jmp_count * 100) / nb_tbs : 0,
4753 nb_tbs ? (direct_jmp2_count * 100) / nb_tbs : 0);
4754 cpu_fprintf(f, "\nStatistics:\n");
4755 cpu_fprintf(f, "TB flush count %d\n", tb_flush_count);
4756 cpu_fprintf(f, "TB invalidate count %d\n", tb_phys_invalidate_count);
4757 cpu_fprintf(f, "TLB flush count %d\n", tlb_flush_count);
4758 tcg_dump_info(f, cpu_fprintf);
4761 #define MMUSUFFIX _cmmu
4763 #define GETPC() NULL
4764 #define env cpu_single_env
4765 #define SOFTMMU_CODE_ACCESS
4768 #include "softmmu_template.h"
4771 #include "softmmu_template.h"
4774 #include "softmmu_template.h"
4777 #include "softmmu_template.h"