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1 | /* | |
2 | * virtual page mapping and translated block handling | |
3 | * | |
4 | * Copyright (c) 2003 Fabrice Bellard | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | #include "config.h" | |
20 | #ifdef _WIN32 | |
21 | #include <windows.h> | |
22 | #else | |
23 | #include <sys/types.h> | |
24 | #include <sys/mman.h> | |
25 | #endif | |
26 | ||
27 | #include "qemu-common.h" | |
28 | #include "cpu.h" | |
29 | #include "tcg.h" | |
30 | #include "hw/hw.h" | |
31 | #include "hw/qdev.h" | |
32 | #include "osdep.h" | |
33 | #include "kvm.h" | |
34 | #include "hw/xen.h" | |
35 | #include "qemu-timer.h" | |
36 | #include "memory.h" | |
37 | #include "exec-memory.h" | |
38 | #if defined(CONFIG_USER_ONLY) | |
39 | #include <qemu.h> | |
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 */ | |
45 | #include <sys/time.h> | |
46 | #include <sys/proc.h> | |
47 | #include <machine/profile.h> | |
48 | #define _KERNEL | |
49 | #include <sys/user.h> | |
50 | #undef _KERNEL | |
51 | #undef sigqueue | |
52 | #include <libutil.h> | |
53 | #endif | |
54 | #endif | |
55 | #else /* !CONFIG_USER_ONLY */ | |
56 | #include "xen-mapcache.h" | |
57 | #include "trace.h" | |
58 | #endif | |
59 | ||
60 | #define WANT_EXEC_OBSOLETE | |
61 | #include "exec-obsolete.h" | |
62 | ||
63 | //#define DEBUG_TB_INVALIDATE | |
64 | //#define DEBUG_FLUSH | |
65 | //#define DEBUG_TLB | |
66 | //#define DEBUG_UNASSIGNED | |
67 | ||
68 | /* make various TB consistency checks */ | |
69 | //#define DEBUG_TB_CHECK | |
70 | //#define DEBUG_TLB_CHECK | |
71 | ||
72 | //#define DEBUG_IOPORT | |
73 | //#define DEBUG_SUBPAGE | |
74 | ||
75 | #if !defined(CONFIG_USER_ONLY) | |
76 | /* TB consistency checks only implemented for usermode emulation. */ | |
77 | #undef DEBUG_TB_CHECK | |
78 | #endif | |
79 | ||
80 | #define SMC_BITMAP_USE_THRESHOLD 10 | |
81 | ||
82 | static TranslationBlock *tbs; | |
83 | static int code_gen_max_blocks; | |
84 | TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE]; | |
85 | static int nb_tbs; | |
86 | /* any access to the tbs or the page table must use this lock */ | |
87 | spinlock_t tb_lock = SPIN_LOCK_UNLOCKED; | |
88 | ||
89 | #if defined(__arm__) || defined(__sparc_v9__) | |
90 | /* The prologue must be reachable with a direct jump. ARM and Sparc64 | |
91 | have limited branch ranges (possibly also PPC) so place it in a | |
92 | section close to code segment. */ | |
93 | #define code_gen_section \ | |
94 | __attribute__((__section__(".gen_code"))) \ | |
95 | __attribute__((aligned (32))) | |
96 | #elif defined(_WIN32) | |
97 | /* Maximum alignment for Win32 is 16. */ | |
98 | #define code_gen_section \ | |
99 | __attribute__((aligned (16))) | |
100 | #else | |
101 | #define code_gen_section \ | |
102 | __attribute__((aligned (32))) | |
103 | #endif | |
104 | ||
105 | uint8_t code_gen_prologue[1024] code_gen_section; | |
106 | static uint8_t *code_gen_buffer; | |
107 | static unsigned long code_gen_buffer_size; | |
108 | /* threshold to flush the translated code buffer */ | |
109 | static unsigned long code_gen_buffer_max_size; | |
110 | static uint8_t *code_gen_ptr; | |
111 | ||
112 | #if !defined(CONFIG_USER_ONLY) | |
113 | int phys_ram_fd; | |
114 | static int in_migration; | |
115 | ||
116 | RAMList ram_list = { .blocks = QLIST_HEAD_INITIALIZER(ram_list.blocks) }; | |
117 | ||
118 | static MemoryRegion *system_memory; | |
119 | static MemoryRegion *system_io; | |
120 | ||
121 | MemoryRegion io_mem_ram, io_mem_rom, io_mem_unassigned, io_mem_notdirty; | |
122 | static MemoryRegion io_mem_subpage_ram; | |
123 | ||
124 | #endif | |
125 | ||
126 | CPUState *first_cpu; | |
127 | /* current CPU in the current thread. It is only valid inside | |
128 | cpu_exec() */ | |
129 | DEFINE_TLS(CPUState *,cpu_single_env); | |
130 | /* 0 = Do not count executed instructions. | |
131 | 1 = Precise instruction counting. | |
132 | 2 = Adaptive rate instruction counting. */ | |
133 | int use_icount = 0; | |
134 | ||
135 | typedef struct PageDesc { | |
136 | /* list of TBs intersecting this ram page */ | |
137 | TranslationBlock *first_tb; | |
138 | /* in order to optimize self modifying code, we count the number | |
139 | of lookups we do to a given page to use a bitmap */ | |
140 | unsigned int code_write_count; | |
141 | uint8_t *code_bitmap; | |
142 | #if defined(CONFIG_USER_ONLY) | |
143 | unsigned long flags; | |
144 | #endif | |
145 | } PageDesc; | |
146 | ||
147 | /* In system mode we want L1_MAP to be based on ram offsets, | |
148 | while in user mode we want it to be based on virtual addresses. */ | |
149 | #if !defined(CONFIG_USER_ONLY) | |
150 | #if HOST_LONG_BITS < TARGET_PHYS_ADDR_SPACE_BITS | |
151 | # define L1_MAP_ADDR_SPACE_BITS HOST_LONG_BITS | |
152 | #else | |
153 | # define L1_MAP_ADDR_SPACE_BITS TARGET_PHYS_ADDR_SPACE_BITS | |
154 | #endif | |
155 | #else | |
156 | # define L1_MAP_ADDR_SPACE_BITS TARGET_VIRT_ADDR_SPACE_BITS | |
157 | #endif | |
158 | ||
159 | /* Size of the L2 (and L3, etc) page tables. */ | |
160 | #define L2_BITS 10 | |
161 | #define L2_SIZE (1 << L2_BITS) | |
162 | ||
163 | #define P_L2_LEVELS \ | |
164 | (((TARGET_PHYS_ADDR_SPACE_BITS - TARGET_PAGE_BITS - 1) / L2_BITS) + 1) | |
165 | ||
166 | /* The bits remaining after N lower levels of page tables. */ | |
167 | #define V_L1_BITS_REM \ | |
168 | ((L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS) % L2_BITS) | |
169 | ||
170 | #if V_L1_BITS_REM < 4 | |
171 | #define V_L1_BITS (V_L1_BITS_REM + L2_BITS) | |
172 | #else | |
173 | #define V_L1_BITS V_L1_BITS_REM | |
174 | #endif | |
175 | ||
176 | #define V_L1_SIZE ((target_ulong)1 << V_L1_BITS) | |
177 | ||
178 | #define V_L1_SHIFT (L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS - V_L1_BITS) | |
179 | ||
180 | unsigned long qemu_real_host_page_size; | |
181 | unsigned long qemu_host_page_size; | |
182 | unsigned long qemu_host_page_mask; | |
183 | ||
184 | /* This is a multi-level map on the virtual address space. | |
185 | The bottom level has pointers to PageDesc. */ | |
186 | static void *l1_map[V_L1_SIZE]; | |
187 | ||
188 | #if !defined(CONFIG_USER_ONLY) | |
189 | typedef struct PhysPageEntry PhysPageEntry; | |
190 | ||
191 | static MemoryRegionSection *phys_sections; | |
192 | static unsigned phys_sections_nb, phys_sections_nb_alloc; | |
193 | static uint16_t phys_section_unassigned; | |
194 | ||
195 | struct PhysPageEntry { | |
196 | union { | |
197 | uint16_t leaf; /* index into phys_sections */ | |
198 | uint16_t node; /* index into phys_map_nodes */ | |
199 | } u; | |
200 | }; | |
201 | ||
202 | /* Simple allocator for PhysPageEntry nodes */ | |
203 | static PhysPageEntry (*phys_map_nodes)[L2_SIZE]; | |
204 | static unsigned phys_map_nodes_nb, phys_map_nodes_nb_alloc; | |
205 | ||
206 | #define PHYS_MAP_NODE_NIL ((uint16_t)~0) | |
207 | ||
208 | /* This is a multi-level map on the physical address space. | |
209 | The bottom level has pointers to MemoryRegionSections. */ | |
210 | static PhysPageEntry phys_map = { .u.node = PHYS_MAP_NODE_NIL }; | |
211 | ||
212 | static void io_mem_init(void); | |
213 | static void memory_map_init(void); | |
214 | ||
215 | /* io memory support */ | |
216 | MemoryRegion *io_mem_region[IO_MEM_NB_ENTRIES]; | |
217 | static char io_mem_used[IO_MEM_NB_ENTRIES]; | |
218 | static MemoryRegion io_mem_watch; | |
219 | #endif | |
220 | ||
221 | /* log support */ | |
222 | #ifdef WIN32 | |
223 | static const char *logfilename = "qemu.log"; | |
224 | #else | |
225 | static const char *logfilename = "/tmp/qemu.log"; | |
226 | #endif | |
227 | FILE *logfile; | |
228 | int loglevel; | |
229 | static int log_append = 0; | |
230 | ||
231 | /* statistics */ | |
232 | #if !defined(CONFIG_USER_ONLY) | |
233 | static int tlb_flush_count; | |
234 | #endif | |
235 | static int tb_flush_count; | |
236 | static int tb_phys_invalidate_count; | |
237 | ||
238 | #ifdef _WIN32 | |
239 | static void map_exec(void *addr, long size) | |
240 | { | |
241 | DWORD old_protect; | |
242 | VirtualProtect(addr, size, | |
243 | PAGE_EXECUTE_READWRITE, &old_protect); | |
244 | ||
245 | } | |
246 | #else | |
247 | static void map_exec(void *addr, long size) | |
248 | { | |
249 | unsigned long start, end, page_size; | |
250 | ||
251 | page_size = getpagesize(); | |
252 | start = (unsigned long)addr; | |
253 | start &= ~(page_size - 1); | |
254 | ||
255 | end = (unsigned long)addr + size; | |
256 | end += page_size - 1; | |
257 | end &= ~(page_size - 1); | |
258 | ||
259 | mprotect((void *)start, end - start, | |
260 | PROT_READ | PROT_WRITE | PROT_EXEC); | |
261 | } | |
262 | #endif | |
263 | ||
264 | static void page_init(void) | |
265 | { | |
266 | /* NOTE: we can always suppose that qemu_host_page_size >= | |
267 | TARGET_PAGE_SIZE */ | |
268 | #ifdef _WIN32 | |
269 | { | |
270 | SYSTEM_INFO system_info; | |
271 | ||
272 | GetSystemInfo(&system_info); | |
273 | qemu_real_host_page_size = system_info.dwPageSize; | |
274 | } | |
275 | #else | |
276 | qemu_real_host_page_size = getpagesize(); | |
277 | #endif | |
278 | if (qemu_host_page_size == 0) | |
279 | qemu_host_page_size = qemu_real_host_page_size; | |
280 | if (qemu_host_page_size < TARGET_PAGE_SIZE) | |
281 | qemu_host_page_size = TARGET_PAGE_SIZE; | |
282 | qemu_host_page_mask = ~(qemu_host_page_size - 1); | |
283 | ||
284 | #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY) | |
285 | { | |
286 | #ifdef HAVE_KINFO_GETVMMAP | |
287 | struct kinfo_vmentry *freep; | |
288 | int i, cnt; | |
289 | ||
290 | freep = kinfo_getvmmap(getpid(), &cnt); | |
291 | if (freep) { | |
292 | mmap_lock(); | |
293 | for (i = 0; i < cnt; i++) { | |
294 | unsigned long startaddr, endaddr; | |
295 | ||
296 | startaddr = freep[i].kve_start; | |
297 | endaddr = freep[i].kve_end; | |
298 | if (h2g_valid(startaddr)) { | |
299 | startaddr = h2g(startaddr) & TARGET_PAGE_MASK; | |
300 | ||
301 | if (h2g_valid(endaddr)) { | |
302 | endaddr = h2g(endaddr); | |
303 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); | |
304 | } else { | |
305 | #if TARGET_ABI_BITS <= L1_MAP_ADDR_SPACE_BITS | |
306 | endaddr = ~0ul; | |
307 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); | |
308 | #endif | |
309 | } | |
310 | } | |
311 | } | |
312 | free(freep); | |
313 | mmap_unlock(); | |
314 | } | |
315 | #else | |
316 | FILE *f; | |
317 | ||
318 | last_brk = (unsigned long)sbrk(0); | |
319 | ||
320 | f = fopen("/compat/linux/proc/self/maps", "r"); | |
321 | if (f) { | |
322 | mmap_lock(); | |
323 | ||
324 | do { | |
325 | unsigned long startaddr, endaddr; | |
326 | int n; | |
327 | ||
328 | n = fscanf (f, "%lx-%lx %*[^\n]\n", &startaddr, &endaddr); | |
329 | ||
330 | if (n == 2 && h2g_valid(startaddr)) { | |
331 | startaddr = h2g(startaddr) & TARGET_PAGE_MASK; | |
332 | ||
333 | if (h2g_valid(endaddr)) { | |
334 | endaddr = h2g(endaddr); | |
335 | } else { | |
336 | endaddr = ~0ul; | |
337 | } | |
338 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); | |
339 | } | |
340 | } while (!feof(f)); | |
341 | ||
342 | fclose(f); | |
343 | mmap_unlock(); | |
344 | } | |
345 | #endif | |
346 | } | |
347 | #endif | |
348 | } | |
349 | ||
350 | static PageDesc *page_find_alloc(tb_page_addr_t index, int alloc) | |
351 | { | |
352 | PageDesc *pd; | |
353 | void **lp; | |
354 | int i; | |
355 | ||
356 | #if defined(CONFIG_USER_ONLY) | |
357 | /* We can't use g_malloc because it may recurse into a locked mutex. */ | |
358 | # define ALLOC(P, SIZE) \ | |
359 | do { \ | |
360 | P = mmap(NULL, SIZE, PROT_READ | PROT_WRITE, \ | |
361 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \ | |
362 | } while (0) | |
363 | #else | |
364 | # define ALLOC(P, SIZE) \ | |
365 | do { P = g_malloc0(SIZE); } while (0) | |
366 | #endif | |
367 | ||
368 | /* Level 1. Always allocated. */ | |
369 | lp = l1_map + ((index >> V_L1_SHIFT) & (V_L1_SIZE - 1)); | |
370 | ||
371 | /* Level 2..N-1. */ | |
372 | for (i = V_L1_SHIFT / L2_BITS - 1; i > 0; i--) { | |
373 | void **p = *lp; | |
374 | ||
375 | if (p == NULL) { | |
376 | if (!alloc) { | |
377 | return NULL; | |
378 | } | |
379 | ALLOC(p, sizeof(void *) * L2_SIZE); | |
380 | *lp = p; | |
381 | } | |
382 | ||
383 | lp = p + ((index >> (i * L2_BITS)) & (L2_SIZE - 1)); | |
384 | } | |
385 | ||
386 | pd = *lp; | |
387 | if (pd == NULL) { | |
388 | if (!alloc) { | |
389 | return NULL; | |
390 | } | |
391 | ALLOC(pd, sizeof(PageDesc) * L2_SIZE); | |
392 | *lp = pd; | |
393 | } | |
394 | ||
395 | #undef ALLOC | |
396 | ||
397 | return pd + (index & (L2_SIZE - 1)); | |
398 | } | |
399 | ||
400 | static inline PageDesc *page_find(tb_page_addr_t index) | |
401 | { | |
402 | return page_find_alloc(index, 0); | |
403 | } | |
404 | ||
405 | #if !defined(CONFIG_USER_ONLY) | |
406 | ||
407 | static PhysPageEntry *phys_map_node_alloc(uint16_t *ptr) | |
408 | { | |
409 | unsigned i; | |
410 | uint16_t ret; | |
411 | ||
412 | /* Assign early to avoid the pointer being invalidated by g_renew() */ | |
413 | *ptr = ret = phys_map_nodes_nb++; | |
414 | assert(ret != PHYS_MAP_NODE_NIL); | |
415 | if (ret == phys_map_nodes_nb_alloc) { | |
416 | typedef PhysPageEntry Node[L2_SIZE]; | |
417 | phys_map_nodes_nb_alloc = MAX(phys_map_nodes_nb_alloc * 2, 16); | |
418 | phys_map_nodes = g_renew(Node, phys_map_nodes, | |
419 | phys_map_nodes_nb_alloc); | |
420 | } | |
421 | for (i = 0; i < L2_SIZE; ++i) { | |
422 | phys_map_nodes[ret][i].u.node = PHYS_MAP_NODE_NIL; | |
423 | } | |
424 | return phys_map_nodes[ret]; | |
425 | } | |
426 | ||
427 | static void phys_map_nodes_reset(void) | |
428 | { | |
429 | phys_map_nodes_nb = 0; | |
430 | } | |
431 | ||
432 | static uint16_t *phys_page_find_alloc(target_phys_addr_t index, int alloc) | |
433 | { | |
434 | PhysPageEntry *lp, *p; | |
435 | int i, j; | |
436 | ||
437 | lp = &phys_map; | |
438 | ||
439 | /* Level 1..N. */ | |
440 | for (i = P_L2_LEVELS - 1; i >= 0; i--) { | |
441 | if (lp->u.node == PHYS_MAP_NODE_NIL) { | |
442 | if (!alloc) { | |
443 | return NULL; | |
444 | } | |
445 | p = phys_map_node_alloc(&lp->u.node); | |
446 | if (i == 0) { | |
447 | for (j = 0; j < L2_SIZE; j++) { | |
448 | p[j].u.leaf = phys_section_unassigned; | |
449 | } | |
450 | } | |
451 | } else { | |
452 | p = phys_map_nodes[lp->u.node]; | |
453 | } | |
454 | lp = &p[(index >> (i * L2_BITS)) & (L2_SIZE - 1)]; | |
455 | } | |
456 | ||
457 | return &lp->u.leaf; | |
458 | } | |
459 | ||
460 | static MemoryRegionSection phys_page_find(target_phys_addr_t index) | |
461 | { | |
462 | PhysPageEntry lp = phys_map; | |
463 | PhysPageEntry *p; | |
464 | int i; | |
465 | MemoryRegionSection section; | |
466 | target_phys_addr_t delta; | |
467 | uint16_t s_index = phys_section_unassigned; | |
468 | ||
469 | for (i = P_L2_LEVELS - 1; i >= 0; i--) { | |
470 | if (lp.u.node == PHYS_MAP_NODE_NIL) { | |
471 | goto not_found; | |
472 | } | |
473 | p = phys_map_nodes[lp.u.node]; | |
474 | lp = p[(index >> (i * L2_BITS)) & (L2_SIZE - 1)]; | |
475 | } | |
476 | ||
477 | s_index = lp.u.leaf; | |
478 | not_found: | |
479 | section = phys_sections[s_index]; | |
480 | index <<= TARGET_PAGE_BITS; | |
481 | assert(section.offset_within_address_space <= index | |
482 | && index <= section.offset_within_address_space + section.size-1); | |
483 | delta = index - section.offset_within_address_space; | |
484 | section.offset_within_address_space += delta; | |
485 | section.offset_within_region += delta; | |
486 | section.size -= delta; | |
487 | return section; | |
488 | } | |
489 | ||
490 | static void tlb_protect_code(ram_addr_t ram_addr); | |
491 | static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr, | |
492 | target_ulong vaddr); | |
493 | #define mmap_lock() do { } while(0) | |
494 | #define mmap_unlock() do { } while(0) | |
495 | #endif | |
496 | ||
497 | #define DEFAULT_CODE_GEN_BUFFER_SIZE (32 * 1024 * 1024) | |
498 | ||
499 | #if defined(CONFIG_USER_ONLY) | |
500 | /* Currently it is not recommended to allocate big chunks of data in | |
501 | user mode. It will change when a dedicated libc will be used */ | |
502 | #define USE_STATIC_CODE_GEN_BUFFER | |
503 | #endif | |
504 | ||
505 | #ifdef USE_STATIC_CODE_GEN_BUFFER | |
506 | static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE] | |
507 | __attribute__((aligned (CODE_GEN_ALIGN))); | |
508 | #endif | |
509 | ||
510 | static void code_gen_alloc(unsigned long tb_size) | |
511 | { | |
512 | #ifdef USE_STATIC_CODE_GEN_BUFFER | |
513 | code_gen_buffer = static_code_gen_buffer; | |
514 | code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE; | |
515 | map_exec(code_gen_buffer, code_gen_buffer_size); | |
516 | #else | |
517 | code_gen_buffer_size = tb_size; | |
518 | if (code_gen_buffer_size == 0) { | |
519 | #if defined(CONFIG_USER_ONLY) | |
520 | code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE; | |
521 | #else | |
522 | /* XXX: needs adjustments */ | |
523 | code_gen_buffer_size = (unsigned long)(ram_size / 4); | |
524 | #endif | |
525 | } | |
526 | if (code_gen_buffer_size < MIN_CODE_GEN_BUFFER_SIZE) | |
527 | code_gen_buffer_size = MIN_CODE_GEN_BUFFER_SIZE; | |
528 | /* The code gen buffer location may have constraints depending on | |
529 | the host cpu and OS */ | |
530 | #if defined(__linux__) | |
531 | { | |
532 | int flags; | |
533 | void *start = NULL; | |
534 | ||
535 | flags = MAP_PRIVATE | MAP_ANONYMOUS; | |
536 | #if defined(__x86_64__) | |
537 | flags |= MAP_32BIT; | |
538 | /* Cannot map more than that */ | |
539 | if (code_gen_buffer_size > (800 * 1024 * 1024)) | |
540 | code_gen_buffer_size = (800 * 1024 * 1024); | |
541 | #elif defined(__sparc_v9__) | |
542 | // Map the buffer below 2G, so we can use direct calls and branches | |
543 | flags |= MAP_FIXED; | |
544 | start = (void *) 0x60000000UL; | |
545 | if (code_gen_buffer_size > (512 * 1024 * 1024)) | |
546 | code_gen_buffer_size = (512 * 1024 * 1024); | |
547 | #elif defined(__arm__) | |
548 | /* Keep the buffer no bigger than 16MB to branch between blocks */ | |
549 | if (code_gen_buffer_size > 16 * 1024 * 1024) | |
550 | code_gen_buffer_size = 16 * 1024 * 1024; | |
551 | #elif defined(__s390x__) | |
552 | /* Map the buffer so that we can use direct calls and branches. */ | |
553 | /* We have a +- 4GB range on the branches; leave some slop. */ | |
554 | if (code_gen_buffer_size > (3ul * 1024 * 1024 * 1024)) { | |
555 | code_gen_buffer_size = 3ul * 1024 * 1024 * 1024; | |
556 | } | |
557 | start = (void *)0x90000000UL; | |
558 | #endif | |
559 | code_gen_buffer = mmap(start, code_gen_buffer_size, | |
560 | PROT_WRITE | PROT_READ | PROT_EXEC, | |
561 | flags, -1, 0); | |
562 | if (code_gen_buffer == MAP_FAILED) { | |
563 | fprintf(stderr, "Could not allocate dynamic translator buffer\n"); | |
564 | exit(1); | |
565 | } | |
566 | } | |
567 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) \ | |
568 | || defined(__DragonFly__) || defined(__OpenBSD__) \ | |
569 | || defined(__NetBSD__) | |
570 | { | |
571 | int flags; | |
572 | void *addr = NULL; | |
573 | flags = MAP_PRIVATE | MAP_ANONYMOUS; | |
574 | #if defined(__x86_64__) | |
575 | /* FreeBSD doesn't have MAP_32BIT, use MAP_FIXED and assume | |
576 | * 0x40000000 is free */ | |
577 | flags |= MAP_FIXED; | |
578 | addr = (void *)0x40000000; | |
579 | /* Cannot map more than that */ | |
580 | if (code_gen_buffer_size > (800 * 1024 * 1024)) | |
581 | code_gen_buffer_size = (800 * 1024 * 1024); | |
582 | #elif defined(__sparc_v9__) | |
583 | // Map the buffer below 2G, so we can use direct calls and branches | |
584 | flags |= MAP_FIXED; | |
585 | addr = (void *) 0x60000000UL; | |
586 | if (code_gen_buffer_size > (512 * 1024 * 1024)) { | |
587 | code_gen_buffer_size = (512 * 1024 * 1024); | |
588 | } | |
589 | #endif | |
590 | code_gen_buffer = mmap(addr, code_gen_buffer_size, | |
591 | PROT_WRITE | PROT_READ | PROT_EXEC, | |
592 | flags, -1, 0); | |
593 | if (code_gen_buffer == MAP_FAILED) { | |
594 | fprintf(stderr, "Could not allocate dynamic translator buffer\n"); | |
595 | exit(1); | |
596 | } | |
597 | } | |
598 | #else | |
599 | code_gen_buffer = g_malloc(code_gen_buffer_size); | |
600 | map_exec(code_gen_buffer, code_gen_buffer_size); | |
601 | #endif | |
602 | #endif /* !USE_STATIC_CODE_GEN_BUFFER */ | |
603 | map_exec(code_gen_prologue, sizeof(code_gen_prologue)); | |
604 | code_gen_buffer_max_size = code_gen_buffer_size - | |
605 | (TCG_MAX_OP_SIZE * OPC_BUF_SIZE); | |
606 | code_gen_max_blocks = code_gen_buffer_size / CODE_GEN_AVG_BLOCK_SIZE; | |
607 | tbs = g_malloc(code_gen_max_blocks * sizeof(TranslationBlock)); | |
608 | } | |
609 | ||
610 | /* Must be called before using the QEMU cpus. 'tb_size' is the size | |
611 | (in bytes) allocated to the translation buffer. Zero means default | |
612 | size. */ | |
613 | void tcg_exec_init(unsigned long tb_size) | |
614 | { | |
615 | cpu_gen_init(); | |
616 | code_gen_alloc(tb_size); | |
617 | code_gen_ptr = code_gen_buffer; | |
618 | page_init(); | |
619 | #if !defined(CONFIG_USER_ONLY) || !defined(CONFIG_USE_GUEST_BASE) | |
620 | /* There's no guest base to take into account, so go ahead and | |
621 | initialize the prologue now. */ | |
622 | tcg_prologue_init(&tcg_ctx); | |
623 | #endif | |
624 | } | |
625 | ||
626 | bool tcg_enabled(void) | |
627 | { | |
628 | return code_gen_buffer != NULL; | |
629 | } | |
630 | ||
631 | void cpu_exec_init_all(void) | |
632 | { | |
633 | #if !defined(CONFIG_USER_ONLY) | |
634 | memory_map_init(); | |
635 | io_mem_init(); | |
636 | #endif | |
637 | } | |
638 | ||
639 | #if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY) | |
640 | ||
641 | static int cpu_common_post_load(void *opaque, int version_id) | |
642 | { | |
643 | CPUState *env = opaque; | |
644 | ||
645 | /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the | |
646 | version_id is increased. */ | |
647 | env->interrupt_request &= ~0x01; | |
648 | tlb_flush(env, 1); | |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
653 | static const VMStateDescription vmstate_cpu_common = { | |
654 | .name = "cpu_common", | |
655 | .version_id = 1, | |
656 | .minimum_version_id = 1, | |
657 | .minimum_version_id_old = 1, | |
658 | .post_load = cpu_common_post_load, | |
659 | .fields = (VMStateField []) { | |
660 | VMSTATE_UINT32(halted, CPUState), | |
661 | VMSTATE_UINT32(interrupt_request, CPUState), | |
662 | VMSTATE_END_OF_LIST() | |
663 | } | |
664 | }; | |
665 | #endif | |
666 | ||
667 | CPUState *qemu_get_cpu(int cpu) | |
668 | { | |
669 | CPUState *env = first_cpu; | |
670 | ||
671 | while (env) { | |
672 | if (env->cpu_index == cpu) | |
673 | break; | |
674 | env = env->next_cpu; | |
675 | } | |
676 | ||
677 | return env; | |
678 | } | |
679 | ||
680 | void cpu_exec_init(CPUState *env) | |
681 | { | |
682 | CPUState **penv; | |
683 | int cpu_index; | |
684 | ||
685 | #if defined(CONFIG_USER_ONLY) | |
686 | cpu_list_lock(); | |
687 | #endif | |
688 | env->next_cpu = NULL; | |
689 | penv = &first_cpu; | |
690 | cpu_index = 0; | |
691 | while (*penv != NULL) { | |
692 | penv = &(*penv)->next_cpu; | |
693 | cpu_index++; | |
694 | } | |
695 | env->cpu_index = cpu_index; | |
696 | env->numa_node = 0; | |
697 | QTAILQ_INIT(&env->breakpoints); | |
698 | QTAILQ_INIT(&env->watchpoints); | |
699 | #ifndef CONFIG_USER_ONLY | |
700 | env->thread_id = qemu_get_thread_id(); | |
701 | #endif | |
702 | *penv = env; | |
703 | #if defined(CONFIG_USER_ONLY) | |
704 | cpu_list_unlock(); | |
705 | #endif | |
706 | #if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY) | |
707 | vmstate_register(NULL, cpu_index, &vmstate_cpu_common, env); | |
708 | register_savevm(NULL, "cpu", cpu_index, CPU_SAVE_VERSION, | |
709 | cpu_save, cpu_load, env); | |
710 | #endif | |
711 | } | |
712 | ||
713 | /* Allocate a new translation block. Flush the translation buffer if | |
714 | too many translation blocks or too much generated code. */ | |
715 | static TranslationBlock *tb_alloc(target_ulong pc) | |
716 | { | |
717 | TranslationBlock *tb; | |
718 | ||
719 | if (nb_tbs >= code_gen_max_blocks || | |
720 | (code_gen_ptr - code_gen_buffer) >= code_gen_buffer_max_size) | |
721 | return NULL; | |
722 | tb = &tbs[nb_tbs++]; | |
723 | tb->pc = pc; | |
724 | tb->cflags = 0; | |
725 | return tb; | |
726 | } | |
727 | ||
728 | void tb_free(TranslationBlock *tb) | |
729 | { | |
730 | /* In practice this is mostly used for single use temporary TB | |
731 | Ignore the hard cases and just back up if this TB happens to | |
732 | be the last one generated. */ | |
733 | if (nb_tbs > 0 && tb == &tbs[nb_tbs - 1]) { | |
734 | code_gen_ptr = tb->tc_ptr; | |
735 | nb_tbs--; | |
736 | } | |
737 | } | |
738 | ||
739 | static inline void invalidate_page_bitmap(PageDesc *p) | |
740 | { | |
741 | if (p->code_bitmap) { | |
742 | g_free(p->code_bitmap); | |
743 | p->code_bitmap = NULL; | |
744 | } | |
745 | p->code_write_count = 0; | |
746 | } | |
747 | ||
748 | /* Set to NULL all the 'first_tb' fields in all PageDescs. */ | |
749 | ||
750 | static void page_flush_tb_1 (int level, void **lp) | |
751 | { | |
752 | int i; | |
753 | ||
754 | if (*lp == NULL) { | |
755 | return; | |
756 | } | |
757 | if (level == 0) { | |
758 | PageDesc *pd = *lp; | |
759 | for (i = 0; i < L2_SIZE; ++i) { | |
760 | pd[i].first_tb = NULL; | |
761 | invalidate_page_bitmap(pd + i); | |
762 | } | |
763 | } else { | |
764 | void **pp = *lp; | |
765 | for (i = 0; i < L2_SIZE; ++i) { | |
766 | page_flush_tb_1 (level - 1, pp + i); | |
767 | } | |
768 | } | |
769 | } | |
770 | ||
771 | static void page_flush_tb(void) | |
772 | { | |
773 | int i; | |
774 | for (i = 0; i < V_L1_SIZE; i++) { | |
775 | page_flush_tb_1(V_L1_SHIFT / L2_BITS - 1, l1_map + i); | |
776 | } | |
777 | } | |
778 | ||
779 | /* flush all the translation blocks */ | |
780 | /* XXX: tb_flush is currently not thread safe */ | |
781 | void tb_flush(CPUState *env1) | |
782 | { | |
783 | CPUState *env; | |
784 | #if defined(DEBUG_FLUSH) | |
785 | printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n", | |
786 | (unsigned long)(code_gen_ptr - code_gen_buffer), | |
787 | nb_tbs, nb_tbs > 0 ? | |
788 | ((unsigned long)(code_gen_ptr - code_gen_buffer)) / nb_tbs : 0); | |
789 | #endif | |
790 | if ((unsigned long)(code_gen_ptr - code_gen_buffer) > code_gen_buffer_size) | |
791 | cpu_abort(env1, "Internal error: code buffer overflow\n"); | |
792 | ||
793 | nb_tbs = 0; | |
794 | ||
795 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
796 | memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); | |
797 | } | |
798 | ||
799 | memset (tb_phys_hash, 0, CODE_GEN_PHYS_HASH_SIZE * sizeof (void *)); | |
800 | page_flush_tb(); | |
801 | ||
802 | code_gen_ptr = code_gen_buffer; | |
803 | /* XXX: flush processor icache at this point if cache flush is | |
804 | expensive */ | |
805 | tb_flush_count++; | |
806 | } | |
807 | ||
808 | #ifdef DEBUG_TB_CHECK | |
809 | ||
810 | static void tb_invalidate_check(target_ulong address) | |
811 | { | |
812 | TranslationBlock *tb; | |
813 | int i; | |
814 | address &= TARGET_PAGE_MASK; | |
815 | for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) { | |
816 | for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { | |
817 | if (!(address + TARGET_PAGE_SIZE <= tb->pc || | |
818 | address >= tb->pc + tb->size)) { | |
819 | printf("ERROR invalidate: address=" TARGET_FMT_lx | |
820 | " PC=%08lx size=%04x\n", | |
821 | address, (long)tb->pc, tb->size); | |
822 | } | |
823 | } | |
824 | } | |
825 | } | |
826 | ||
827 | /* verify that all the pages have correct rights for code */ | |
828 | static void tb_page_check(void) | |
829 | { | |
830 | TranslationBlock *tb; | |
831 | int i, flags1, flags2; | |
832 | ||
833 | for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) { | |
834 | for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { | |
835 | flags1 = page_get_flags(tb->pc); | |
836 | flags2 = page_get_flags(tb->pc + tb->size - 1); | |
837 | if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) { | |
838 | printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n", | |
839 | (long)tb->pc, tb->size, flags1, flags2); | |
840 | } | |
841 | } | |
842 | } | |
843 | } | |
844 | ||
845 | #endif | |
846 | ||
847 | /* invalidate one TB */ | |
848 | static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb, | |
849 | int next_offset) | |
850 | { | |
851 | TranslationBlock *tb1; | |
852 | for(;;) { | |
853 | tb1 = *ptb; | |
854 | if (tb1 == tb) { | |
855 | *ptb = *(TranslationBlock **)((char *)tb1 + next_offset); | |
856 | break; | |
857 | } | |
858 | ptb = (TranslationBlock **)((char *)tb1 + next_offset); | |
859 | } | |
860 | } | |
861 | ||
862 | static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) | |
863 | { | |
864 | TranslationBlock *tb1; | |
865 | unsigned int n1; | |
866 | ||
867 | for(;;) { | |
868 | tb1 = *ptb; | |
869 | n1 = (long)tb1 & 3; | |
870 | tb1 = (TranslationBlock *)((long)tb1 & ~3); | |
871 | if (tb1 == tb) { | |
872 | *ptb = tb1->page_next[n1]; | |
873 | break; | |
874 | } | |
875 | ptb = &tb1->page_next[n1]; | |
876 | } | |
877 | } | |
878 | ||
879 | static inline void tb_jmp_remove(TranslationBlock *tb, int n) | |
880 | { | |
881 | TranslationBlock *tb1, **ptb; | |
882 | unsigned int n1; | |
883 | ||
884 | ptb = &tb->jmp_next[n]; | |
885 | tb1 = *ptb; | |
886 | if (tb1) { | |
887 | /* find tb(n) in circular list */ | |
888 | for(;;) { | |
889 | tb1 = *ptb; | |
890 | n1 = (long)tb1 & 3; | |
891 | tb1 = (TranslationBlock *)((long)tb1 & ~3); | |
892 | if (n1 == n && tb1 == tb) | |
893 | break; | |
894 | if (n1 == 2) { | |
895 | ptb = &tb1->jmp_first; | |
896 | } else { | |
897 | ptb = &tb1->jmp_next[n1]; | |
898 | } | |
899 | } | |
900 | /* now we can suppress tb(n) from the list */ | |
901 | *ptb = tb->jmp_next[n]; | |
902 | ||
903 | tb->jmp_next[n] = NULL; | |
904 | } | |
905 | } | |
906 | ||
907 | /* reset the jump entry 'n' of a TB so that it is not chained to | |
908 | another TB */ | |
909 | static inline void tb_reset_jump(TranslationBlock *tb, int n) | |
910 | { | |
911 | tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); | |
912 | } | |
913 | ||
914 | void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr) | |
915 | { | |
916 | CPUState *env; | |
917 | PageDesc *p; | |
918 | unsigned int h, n1; | |
919 | tb_page_addr_t phys_pc; | |
920 | TranslationBlock *tb1, *tb2; | |
921 | ||
922 | /* remove the TB from the hash list */ | |
923 | phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK); | |
924 | h = tb_phys_hash_func(phys_pc); | |
925 | tb_remove(&tb_phys_hash[h], tb, | |
926 | offsetof(TranslationBlock, phys_hash_next)); | |
927 | ||
928 | /* remove the TB from the page list */ | |
929 | if (tb->page_addr[0] != page_addr) { | |
930 | p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS); | |
931 | tb_page_remove(&p->first_tb, tb); | |
932 | invalidate_page_bitmap(p); | |
933 | } | |
934 | if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { | |
935 | p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS); | |
936 | tb_page_remove(&p->first_tb, tb); | |
937 | invalidate_page_bitmap(p); | |
938 | } | |
939 | ||
940 | tb_invalidated_flag = 1; | |
941 | ||
942 | /* remove the TB from the hash list */ | |
943 | h = tb_jmp_cache_hash_func(tb->pc); | |
944 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
945 | if (env->tb_jmp_cache[h] == tb) | |
946 | env->tb_jmp_cache[h] = NULL; | |
947 | } | |
948 | ||
949 | /* suppress this TB from the two jump lists */ | |
950 | tb_jmp_remove(tb, 0); | |
951 | tb_jmp_remove(tb, 1); | |
952 | ||
953 | /* suppress any remaining jumps to this TB */ | |
954 | tb1 = tb->jmp_first; | |
955 | for(;;) { | |
956 | n1 = (long)tb1 & 3; | |
957 | if (n1 == 2) | |
958 | break; | |
959 | tb1 = (TranslationBlock *)((long)tb1 & ~3); | |
960 | tb2 = tb1->jmp_next[n1]; | |
961 | tb_reset_jump(tb1, n1); | |
962 | tb1->jmp_next[n1] = NULL; | |
963 | tb1 = tb2; | |
964 | } | |
965 | tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ | |
966 | ||
967 | tb_phys_invalidate_count++; | |
968 | } | |
969 | ||
970 | static inline void set_bits(uint8_t *tab, int start, int len) | |
971 | { | |
972 | int end, mask, end1; | |
973 | ||
974 | end = start + len; | |
975 | tab += start >> 3; | |
976 | mask = 0xff << (start & 7); | |
977 | if ((start & ~7) == (end & ~7)) { | |
978 | if (start < end) { | |
979 | mask &= ~(0xff << (end & 7)); | |
980 | *tab |= mask; | |
981 | } | |
982 | } else { | |
983 | *tab++ |= mask; | |
984 | start = (start + 8) & ~7; | |
985 | end1 = end & ~7; | |
986 | while (start < end1) { | |
987 | *tab++ = 0xff; | |
988 | start += 8; | |
989 | } | |
990 | if (start < end) { | |
991 | mask = ~(0xff << (end & 7)); | |
992 | *tab |= mask; | |
993 | } | |
994 | } | |
995 | } | |
996 | ||
997 | static void build_page_bitmap(PageDesc *p) | |
998 | { | |
999 | int n, tb_start, tb_end; | |
1000 | TranslationBlock *tb; | |
1001 | ||
1002 | p->code_bitmap = g_malloc0(TARGET_PAGE_SIZE / 8); | |
1003 | ||
1004 | tb = p->first_tb; | |
1005 | while (tb != NULL) { | |
1006 | n = (long)tb & 3; | |
1007 | tb = (TranslationBlock *)((long)tb & ~3); | |
1008 | /* NOTE: this is subtle as a TB may span two physical pages */ | |
1009 | if (n == 0) { | |
1010 | /* NOTE: tb_end may be after the end of the page, but | |
1011 | it is not a problem */ | |
1012 | tb_start = tb->pc & ~TARGET_PAGE_MASK; | |
1013 | tb_end = tb_start + tb->size; | |
1014 | if (tb_end > TARGET_PAGE_SIZE) | |
1015 | tb_end = TARGET_PAGE_SIZE; | |
1016 | } else { | |
1017 | tb_start = 0; | |
1018 | tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); | |
1019 | } | |
1020 | set_bits(p->code_bitmap, tb_start, tb_end - tb_start); | |
1021 | tb = tb->page_next[n]; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | TranslationBlock *tb_gen_code(CPUState *env, | |
1026 | target_ulong pc, target_ulong cs_base, | |
1027 | int flags, int cflags) | |
1028 | { | |
1029 | TranslationBlock *tb; | |
1030 | uint8_t *tc_ptr; | |
1031 | tb_page_addr_t phys_pc, phys_page2; | |
1032 | target_ulong virt_page2; | |
1033 | int code_gen_size; | |
1034 | ||
1035 | phys_pc = get_page_addr_code(env, pc); | |
1036 | tb = tb_alloc(pc); | |
1037 | if (!tb) { | |
1038 | /* flush must be done */ | |
1039 | tb_flush(env); | |
1040 | /* cannot fail at this point */ | |
1041 | tb = tb_alloc(pc); | |
1042 | /* Don't forget to invalidate previous TB info. */ | |
1043 | tb_invalidated_flag = 1; | |
1044 | } | |
1045 | tc_ptr = code_gen_ptr; | |
1046 | tb->tc_ptr = tc_ptr; | |
1047 | tb->cs_base = cs_base; | |
1048 | tb->flags = flags; | |
1049 | tb->cflags = cflags; | |
1050 | cpu_gen_code(env, tb, &code_gen_size); | |
1051 | code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); | |
1052 | ||
1053 | /* check next page if needed */ | |
1054 | virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK; | |
1055 | phys_page2 = -1; | |
1056 | if ((pc & TARGET_PAGE_MASK) != virt_page2) { | |
1057 | phys_page2 = get_page_addr_code(env, virt_page2); | |
1058 | } | |
1059 | tb_link_page(tb, phys_pc, phys_page2); | |
1060 | return tb; | |
1061 | } | |
1062 | ||
1063 | /* invalidate all TBs which intersect with the target physical page | |
1064 | starting in range [start;end[. NOTE: start and end must refer to | |
1065 | the same physical page. 'is_cpu_write_access' should be true if called | |
1066 | from a real cpu write access: the virtual CPU will exit the current | |
1067 | TB if code is modified inside this TB. */ | |
1068 | void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end, | |
1069 | int is_cpu_write_access) | |
1070 | { | |
1071 | TranslationBlock *tb, *tb_next, *saved_tb; | |
1072 | CPUState *env = cpu_single_env; | |
1073 | tb_page_addr_t tb_start, tb_end; | |
1074 | PageDesc *p; | |
1075 | int n; | |
1076 | #ifdef TARGET_HAS_PRECISE_SMC | |
1077 | int current_tb_not_found = is_cpu_write_access; | |
1078 | TranslationBlock *current_tb = NULL; | |
1079 | int current_tb_modified = 0; | |
1080 | target_ulong current_pc = 0; | |
1081 | target_ulong current_cs_base = 0; | |
1082 | int current_flags = 0; | |
1083 | #endif /* TARGET_HAS_PRECISE_SMC */ | |
1084 | ||
1085 | p = page_find(start >> TARGET_PAGE_BITS); | |
1086 | if (!p) | |
1087 | return; | |
1088 | if (!p->code_bitmap && | |
1089 | ++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD && | |
1090 | is_cpu_write_access) { | |
1091 | /* build code bitmap */ | |
1092 | build_page_bitmap(p); | |
1093 | } | |
1094 | ||
1095 | /* we remove all the TBs in the range [start, end[ */ | |
1096 | /* XXX: see if in some cases it could be faster to invalidate all the code */ | |
1097 | tb = p->first_tb; | |
1098 | while (tb != NULL) { | |
1099 | n = (long)tb & 3; | |
1100 | tb = (TranslationBlock *)((long)tb & ~3); | |
1101 | tb_next = tb->page_next[n]; | |
1102 | /* NOTE: this is subtle as a TB may span two physical pages */ | |
1103 | if (n == 0) { | |
1104 | /* NOTE: tb_end may be after the end of the page, but | |
1105 | it is not a problem */ | |
1106 | tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK); | |
1107 | tb_end = tb_start + tb->size; | |
1108 | } else { | |
1109 | tb_start = tb->page_addr[1]; | |
1110 | tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); | |
1111 | } | |
1112 | if (!(tb_end <= start || tb_start >= end)) { | |
1113 | #ifdef TARGET_HAS_PRECISE_SMC | |
1114 | if (current_tb_not_found) { | |
1115 | current_tb_not_found = 0; | |
1116 | current_tb = NULL; | |
1117 | if (env->mem_io_pc) { | |
1118 | /* now we have a real cpu fault */ | |
1119 | current_tb = tb_find_pc(env->mem_io_pc); | |
1120 | } | |
1121 | } | |
1122 | if (current_tb == tb && | |
1123 | (current_tb->cflags & CF_COUNT_MASK) != 1) { | |
1124 | /* If we are modifying the current TB, we must stop | |
1125 | its execution. We could be more precise by checking | |
1126 | that the modification is after the current PC, but it | |
1127 | would require a specialized function to partially | |
1128 | restore the CPU state */ | |
1129 | ||
1130 | current_tb_modified = 1; | |
1131 | cpu_restore_state(current_tb, env, env->mem_io_pc); | |
1132 | cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, | |
1133 | ¤t_flags); | |
1134 | } | |
1135 | #endif /* TARGET_HAS_PRECISE_SMC */ | |
1136 | /* we need to do that to handle the case where a signal | |
1137 | occurs while doing tb_phys_invalidate() */ | |
1138 | saved_tb = NULL; | |
1139 | if (env) { | |
1140 | saved_tb = env->current_tb; | |
1141 | env->current_tb = NULL; | |
1142 | } | |
1143 | tb_phys_invalidate(tb, -1); | |
1144 | if (env) { | |
1145 | env->current_tb = saved_tb; | |
1146 | if (env->interrupt_request && env->current_tb) | |
1147 | cpu_interrupt(env, env->interrupt_request); | |
1148 | } | |
1149 | } | |
1150 | tb = tb_next; | |
1151 | } | |
1152 | #if !defined(CONFIG_USER_ONLY) | |
1153 | /* if no code remaining, no need to continue to use slow writes */ | |
1154 | if (!p->first_tb) { | |
1155 | invalidate_page_bitmap(p); | |
1156 | if (is_cpu_write_access) { | |
1157 | tlb_unprotect_code_phys(env, start, env->mem_io_vaddr); | |
1158 | } | |
1159 | } | |
1160 | #endif | |
1161 | #ifdef TARGET_HAS_PRECISE_SMC | |
1162 | if (current_tb_modified) { | |
1163 | /* we generate a block containing just the instruction | |
1164 | modifying the memory. It will ensure that it cannot modify | |
1165 | itself */ | |
1166 | env->current_tb = NULL; | |
1167 | tb_gen_code(env, current_pc, current_cs_base, current_flags, 1); | |
1168 | cpu_resume_from_signal(env, NULL); | |
1169 | } | |
1170 | #endif | |
1171 | } | |
1172 | ||
1173 | /* len must be <= 8 and start must be a multiple of len */ | |
1174 | static inline void tb_invalidate_phys_page_fast(tb_page_addr_t start, int len) | |
1175 | { | |
1176 | PageDesc *p; | |
1177 | int offset, b; | |
1178 | #if 0 | |
1179 | if (1) { | |
1180 | qemu_log("modifying code at 0x%x size=%d EIP=%x PC=%08x\n", | |
1181 | cpu_single_env->mem_io_vaddr, len, | |
1182 | cpu_single_env->eip, | |
1183 | cpu_single_env->eip + (long)cpu_single_env->segs[R_CS].base); | |
1184 | } | |
1185 | #endif | |
1186 | p = page_find(start >> TARGET_PAGE_BITS); | |
1187 | if (!p) | |
1188 | return; | |
1189 | if (p->code_bitmap) { | |
1190 | offset = start & ~TARGET_PAGE_MASK; | |
1191 | b = p->code_bitmap[offset >> 3] >> (offset & 7); | |
1192 | if (b & ((1 << len) - 1)) | |
1193 | goto do_invalidate; | |
1194 | } else { | |
1195 | do_invalidate: | |
1196 | tb_invalidate_phys_page_range(start, start + len, 1); | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | #if !defined(CONFIG_SOFTMMU) | |
1201 | static void tb_invalidate_phys_page(tb_page_addr_t addr, | |
1202 | unsigned long pc, void *puc) | |
1203 | { | |
1204 | TranslationBlock *tb; | |
1205 | PageDesc *p; | |
1206 | int n; | |
1207 | #ifdef TARGET_HAS_PRECISE_SMC | |
1208 | TranslationBlock *current_tb = NULL; | |
1209 | CPUState *env = cpu_single_env; | |
1210 | int current_tb_modified = 0; | |
1211 | target_ulong current_pc = 0; | |
1212 | target_ulong current_cs_base = 0; | |
1213 | int current_flags = 0; | |
1214 | #endif | |
1215 | ||
1216 | addr &= TARGET_PAGE_MASK; | |
1217 | p = page_find(addr >> TARGET_PAGE_BITS); | |
1218 | if (!p) | |
1219 | return; | |
1220 | tb = p->first_tb; | |
1221 | #ifdef TARGET_HAS_PRECISE_SMC | |
1222 | if (tb && pc != 0) { | |
1223 | current_tb = tb_find_pc(pc); | |
1224 | } | |
1225 | #endif | |
1226 | while (tb != NULL) { | |
1227 | n = (long)tb & 3; | |
1228 | tb = (TranslationBlock *)((long)tb & ~3); | |
1229 | #ifdef TARGET_HAS_PRECISE_SMC | |
1230 | if (current_tb == tb && | |
1231 | (current_tb->cflags & CF_COUNT_MASK) != 1) { | |
1232 | /* If we are modifying the current TB, we must stop | |
1233 | its execution. We could be more precise by checking | |
1234 | that the modification is after the current PC, but it | |
1235 | would require a specialized function to partially | |
1236 | restore the CPU state */ | |
1237 | ||
1238 | current_tb_modified = 1; | |
1239 | cpu_restore_state(current_tb, env, pc); | |
1240 | cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, | |
1241 | ¤t_flags); | |
1242 | } | |
1243 | #endif /* TARGET_HAS_PRECISE_SMC */ | |
1244 | tb_phys_invalidate(tb, addr); | |
1245 | tb = tb->page_next[n]; | |
1246 | } | |
1247 | p->first_tb = NULL; | |
1248 | #ifdef TARGET_HAS_PRECISE_SMC | |
1249 | if (current_tb_modified) { | |
1250 | /* we generate a block containing just the instruction | |
1251 | modifying the memory. It will ensure that it cannot modify | |
1252 | itself */ | |
1253 | env->current_tb = NULL; | |
1254 | tb_gen_code(env, current_pc, current_cs_base, current_flags, 1); | |
1255 | cpu_resume_from_signal(env, puc); | |
1256 | } | |
1257 | #endif | |
1258 | } | |
1259 | #endif | |
1260 | ||
1261 | /* add the tb in the target page and protect it if necessary */ | |
1262 | static inline void tb_alloc_page(TranslationBlock *tb, | |
1263 | unsigned int n, tb_page_addr_t page_addr) | |
1264 | { | |
1265 | PageDesc *p; | |
1266 | #ifndef CONFIG_USER_ONLY | |
1267 | bool page_already_protected; | |
1268 | #endif | |
1269 | ||
1270 | tb->page_addr[n] = page_addr; | |
1271 | p = page_find_alloc(page_addr >> TARGET_PAGE_BITS, 1); | |
1272 | tb->page_next[n] = p->first_tb; | |
1273 | #ifndef CONFIG_USER_ONLY | |
1274 | page_already_protected = p->first_tb != NULL; | |
1275 | #endif | |
1276 | p->first_tb = (TranslationBlock *)((long)tb | n); | |
1277 | invalidate_page_bitmap(p); | |
1278 | ||
1279 | #if defined(TARGET_HAS_SMC) || 1 | |
1280 | ||
1281 | #if defined(CONFIG_USER_ONLY) | |
1282 | if (p->flags & PAGE_WRITE) { | |
1283 | target_ulong addr; | |
1284 | PageDesc *p2; | |
1285 | int prot; | |
1286 | ||
1287 | /* force the host page as non writable (writes will have a | |
1288 | page fault + mprotect overhead) */ | |
1289 | page_addr &= qemu_host_page_mask; | |
1290 | prot = 0; | |
1291 | for(addr = page_addr; addr < page_addr + qemu_host_page_size; | |
1292 | addr += TARGET_PAGE_SIZE) { | |
1293 | ||
1294 | p2 = page_find (addr >> TARGET_PAGE_BITS); | |
1295 | if (!p2) | |
1296 | continue; | |
1297 | prot |= p2->flags; | |
1298 | p2->flags &= ~PAGE_WRITE; | |
1299 | } | |
1300 | mprotect(g2h(page_addr), qemu_host_page_size, | |
1301 | (prot & PAGE_BITS) & ~PAGE_WRITE); | |
1302 | #ifdef DEBUG_TB_INVALIDATE | |
1303 | printf("protecting code page: 0x" TARGET_FMT_lx "\n", | |
1304 | page_addr); | |
1305 | #endif | |
1306 | } | |
1307 | #else | |
1308 | /* if some code is already present, then the pages are already | |
1309 | protected. So we handle the case where only the first TB is | |
1310 | allocated in a physical page */ | |
1311 | if (!page_already_protected) { | |
1312 | tlb_protect_code(page_addr); | |
1313 | } | |
1314 | #endif | |
1315 | ||
1316 | #endif /* TARGET_HAS_SMC */ | |
1317 | } | |
1318 | ||
1319 | /* add a new TB and link it to the physical page tables. phys_page2 is | |
1320 | (-1) to indicate that only one page contains the TB. */ | |
1321 | void tb_link_page(TranslationBlock *tb, | |
1322 | tb_page_addr_t phys_pc, tb_page_addr_t phys_page2) | |
1323 | { | |
1324 | unsigned int h; | |
1325 | TranslationBlock **ptb; | |
1326 | ||
1327 | /* Grab the mmap lock to stop another thread invalidating this TB | |
1328 | before we are done. */ | |
1329 | mmap_lock(); | |
1330 | /* add in the physical hash table */ | |
1331 | h = tb_phys_hash_func(phys_pc); | |
1332 | ptb = &tb_phys_hash[h]; | |
1333 | tb->phys_hash_next = *ptb; | |
1334 | *ptb = tb; | |
1335 | ||
1336 | /* add in the page list */ | |
1337 | tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK); | |
1338 | if (phys_page2 != -1) | |
1339 | tb_alloc_page(tb, 1, phys_page2); | |
1340 | else | |
1341 | tb->page_addr[1] = -1; | |
1342 | ||
1343 | tb->jmp_first = (TranslationBlock *)((long)tb | 2); | |
1344 | tb->jmp_next[0] = NULL; | |
1345 | tb->jmp_next[1] = NULL; | |
1346 | ||
1347 | /* init original jump addresses */ | |
1348 | if (tb->tb_next_offset[0] != 0xffff) | |
1349 | tb_reset_jump(tb, 0); | |
1350 | if (tb->tb_next_offset[1] != 0xffff) | |
1351 | tb_reset_jump(tb, 1); | |
1352 | ||
1353 | #ifdef DEBUG_TB_CHECK | |
1354 | tb_page_check(); | |
1355 | #endif | |
1356 | mmap_unlock(); | |
1357 | } | |
1358 | ||
1359 | /* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr < | |
1360 | tb[1].tc_ptr. Return NULL if not found */ | |
1361 | TranslationBlock *tb_find_pc(unsigned long tc_ptr) | |
1362 | { | |
1363 | int m_min, m_max, m; | |
1364 | unsigned long v; | |
1365 | TranslationBlock *tb; | |
1366 | ||
1367 | if (nb_tbs <= 0) | |
1368 | return NULL; | |
1369 | if (tc_ptr < (unsigned long)code_gen_buffer || | |
1370 | tc_ptr >= (unsigned long)code_gen_ptr) | |
1371 | return NULL; | |
1372 | /* binary search (cf Knuth) */ | |
1373 | m_min = 0; | |
1374 | m_max = nb_tbs - 1; | |
1375 | while (m_min <= m_max) { | |
1376 | m = (m_min + m_max) >> 1; | |
1377 | tb = &tbs[m]; | |
1378 | v = (unsigned long)tb->tc_ptr; | |
1379 | if (v == tc_ptr) | |
1380 | return tb; | |
1381 | else if (tc_ptr < v) { | |
1382 | m_max = m - 1; | |
1383 | } else { | |
1384 | m_min = m + 1; | |
1385 | } | |
1386 | } | |
1387 | return &tbs[m_max]; | |
1388 | } | |
1389 | ||
1390 | static void tb_reset_jump_recursive(TranslationBlock *tb); | |
1391 | ||
1392 | static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) | |
1393 | { | |
1394 | TranslationBlock *tb1, *tb_next, **ptb; | |
1395 | unsigned int n1; | |
1396 | ||
1397 | tb1 = tb->jmp_next[n]; | |
1398 | if (tb1 != NULL) { | |
1399 | /* find head of list */ | |
1400 | for(;;) { | |
1401 | n1 = (long)tb1 & 3; | |
1402 | tb1 = (TranslationBlock *)((long)tb1 & ~3); | |
1403 | if (n1 == 2) | |
1404 | break; | |
1405 | tb1 = tb1->jmp_next[n1]; | |
1406 | } | |
1407 | /* we are now sure now that tb jumps to tb1 */ | |
1408 | tb_next = tb1; | |
1409 | ||
1410 | /* remove tb from the jmp_first list */ | |
1411 | ptb = &tb_next->jmp_first; | |
1412 | for(;;) { | |
1413 | tb1 = *ptb; | |
1414 | n1 = (long)tb1 & 3; | |
1415 | tb1 = (TranslationBlock *)((long)tb1 & ~3); | |
1416 | if (n1 == n && tb1 == tb) | |
1417 | break; | |
1418 | ptb = &tb1->jmp_next[n1]; | |
1419 | } | |
1420 | *ptb = tb->jmp_next[n]; | |
1421 | tb->jmp_next[n] = NULL; | |
1422 | ||
1423 | /* suppress the jump to next tb in generated code */ | |
1424 | tb_reset_jump(tb, n); | |
1425 | ||
1426 | /* suppress jumps in the tb on which we could have jumped */ | |
1427 | tb_reset_jump_recursive(tb_next); | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | static void tb_reset_jump_recursive(TranslationBlock *tb) | |
1432 | { | |
1433 | tb_reset_jump_recursive2(tb, 0); | |
1434 | tb_reset_jump_recursive2(tb, 1); | |
1435 | } | |
1436 | ||
1437 | #if defined(TARGET_HAS_ICE) | |
1438 | #if defined(CONFIG_USER_ONLY) | |
1439 | static void breakpoint_invalidate(CPUState *env, target_ulong pc) | |
1440 | { | |
1441 | tb_invalidate_phys_page_range(pc, pc + 1, 0); | |
1442 | } | |
1443 | #else | |
1444 | static void breakpoint_invalidate(CPUState *env, target_ulong pc) | |
1445 | { | |
1446 | target_phys_addr_t addr; | |
1447 | ram_addr_t ram_addr; | |
1448 | MemoryRegionSection section; | |
1449 | ||
1450 | addr = cpu_get_phys_page_debug(env, pc); | |
1451 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
1452 | if (!(memory_region_is_ram(section.mr) | |
1453 | || (section.mr->rom_device && section.mr->readable))) { | |
1454 | return; | |
1455 | } | |
1456 | ram_addr = (memory_region_get_ram_addr(section.mr) | |
1457 | + section.offset_within_region) & TARGET_PAGE_MASK; | |
1458 | ram_addr |= (pc & ~TARGET_PAGE_MASK); | |
1459 | tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0); | |
1460 | } | |
1461 | #endif | |
1462 | #endif /* TARGET_HAS_ICE */ | |
1463 | ||
1464 | #if defined(CONFIG_USER_ONLY) | |
1465 | void cpu_watchpoint_remove_all(CPUState *env, int mask) | |
1466 | ||
1467 | { | |
1468 | } | |
1469 | ||
1470 | int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len, | |
1471 | int flags, CPUWatchpoint **watchpoint) | |
1472 | { | |
1473 | return -ENOSYS; | |
1474 | } | |
1475 | #else | |
1476 | /* Add a watchpoint. */ | |
1477 | int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len, | |
1478 | int flags, CPUWatchpoint **watchpoint) | |
1479 | { | |
1480 | target_ulong len_mask = ~(len - 1); | |
1481 | CPUWatchpoint *wp; | |
1482 | ||
1483 | /* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */ | |
1484 | if ((len != 1 && len != 2 && len != 4 && len != 8) || (addr & ~len_mask)) { | |
1485 | fprintf(stderr, "qemu: tried to set invalid watchpoint at " | |
1486 | TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len); | |
1487 | return -EINVAL; | |
1488 | } | |
1489 | wp = g_malloc(sizeof(*wp)); | |
1490 | ||
1491 | wp->vaddr = addr; | |
1492 | wp->len_mask = len_mask; | |
1493 | wp->flags = flags; | |
1494 | ||
1495 | /* keep all GDB-injected watchpoints in front */ | |
1496 | if (flags & BP_GDB) | |
1497 | QTAILQ_INSERT_HEAD(&env->watchpoints, wp, entry); | |
1498 | else | |
1499 | QTAILQ_INSERT_TAIL(&env->watchpoints, wp, entry); | |
1500 | ||
1501 | tlb_flush_page(env, addr); | |
1502 | ||
1503 | if (watchpoint) | |
1504 | *watchpoint = wp; | |
1505 | return 0; | |
1506 | } | |
1507 | ||
1508 | /* Remove a specific watchpoint. */ | |
1509 | int cpu_watchpoint_remove(CPUState *env, target_ulong addr, target_ulong len, | |
1510 | int flags) | |
1511 | { | |
1512 | target_ulong len_mask = ~(len - 1); | |
1513 | CPUWatchpoint *wp; | |
1514 | ||
1515 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
1516 | if (addr == wp->vaddr && len_mask == wp->len_mask | |
1517 | && flags == (wp->flags & ~BP_WATCHPOINT_HIT)) { | |
1518 | cpu_watchpoint_remove_by_ref(env, wp); | |
1519 | return 0; | |
1520 | } | |
1521 | } | |
1522 | return -ENOENT; | |
1523 | } | |
1524 | ||
1525 | /* Remove a specific watchpoint by reference. */ | |
1526 | void cpu_watchpoint_remove_by_ref(CPUState *env, CPUWatchpoint *watchpoint) | |
1527 | { | |
1528 | QTAILQ_REMOVE(&env->watchpoints, watchpoint, entry); | |
1529 | ||
1530 | tlb_flush_page(env, watchpoint->vaddr); | |
1531 | ||
1532 | g_free(watchpoint); | |
1533 | } | |
1534 | ||
1535 | /* Remove all matching watchpoints. */ | |
1536 | void cpu_watchpoint_remove_all(CPUState *env, int mask) | |
1537 | { | |
1538 | CPUWatchpoint *wp, *next; | |
1539 | ||
1540 | QTAILQ_FOREACH_SAFE(wp, &env->watchpoints, entry, next) { | |
1541 | if (wp->flags & mask) | |
1542 | cpu_watchpoint_remove_by_ref(env, wp); | |
1543 | } | |
1544 | } | |
1545 | #endif | |
1546 | ||
1547 | /* Add a breakpoint. */ | |
1548 | int cpu_breakpoint_insert(CPUState *env, target_ulong pc, int flags, | |
1549 | CPUBreakpoint **breakpoint) | |
1550 | { | |
1551 | #if defined(TARGET_HAS_ICE) | |
1552 | CPUBreakpoint *bp; | |
1553 | ||
1554 | bp = g_malloc(sizeof(*bp)); | |
1555 | ||
1556 | bp->pc = pc; | |
1557 | bp->flags = flags; | |
1558 | ||
1559 | /* keep all GDB-injected breakpoints in front */ | |
1560 | if (flags & BP_GDB) | |
1561 | QTAILQ_INSERT_HEAD(&env->breakpoints, bp, entry); | |
1562 | else | |
1563 | QTAILQ_INSERT_TAIL(&env->breakpoints, bp, entry); | |
1564 | ||
1565 | breakpoint_invalidate(env, pc); | |
1566 | ||
1567 | if (breakpoint) | |
1568 | *breakpoint = bp; | |
1569 | return 0; | |
1570 | #else | |
1571 | return -ENOSYS; | |
1572 | #endif | |
1573 | } | |
1574 | ||
1575 | /* Remove a specific breakpoint. */ | |
1576 | int cpu_breakpoint_remove(CPUState *env, target_ulong pc, int flags) | |
1577 | { | |
1578 | #if defined(TARGET_HAS_ICE) | |
1579 | CPUBreakpoint *bp; | |
1580 | ||
1581 | QTAILQ_FOREACH(bp, &env->breakpoints, entry) { | |
1582 | if (bp->pc == pc && bp->flags == flags) { | |
1583 | cpu_breakpoint_remove_by_ref(env, bp); | |
1584 | return 0; | |
1585 | } | |
1586 | } | |
1587 | return -ENOENT; | |
1588 | #else | |
1589 | return -ENOSYS; | |
1590 | #endif | |
1591 | } | |
1592 | ||
1593 | /* Remove a specific breakpoint by reference. */ | |
1594 | void cpu_breakpoint_remove_by_ref(CPUState *env, CPUBreakpoint *breakpoint) | |
1595 | { | |
1596 | #if defined(TARGET_HAS_ICE) | |
1597 | QTAILQ_REMOVE(&env->breakpoints, breakpoint, entry); | |
1598 | ||
1599 | breakpoint_invalidate(env, breakpoint->pc); | |
1600 | ||
1601 | g_free(breakpoint); | |
1602 | #endif | |
1603 | } | |
1604 | ||
1605 | /* Remove all matching breakpoints. */ | |
1606 | void cpu_breakpoint_remove_all(CPUState *env, int mask) | |
1607 | { | |
1608 | #if defined(TARGET_HAS_ICE) | |
1609 | CPUBreakpoint *bp, *next; | |
1610 | ||
1611 | QTAILQ_FOREACH_SAFE(bp, &env->breakpoints, entry, next) { | |
1612 | if (bp->flags & mask) | |
1613 | cpu_breakpoint_remove_by_ref(env, bp); | |
1614 | } | |
1615 | #endif | |
1616 | } | |
1617 | ||
1618 | /* enable or disable single step mode. EXCP_DEBUG is returned by the | |
1619 | CPU loop after each instruction */ | |
1620 | void cpu_single_step(CPUState *env, int enabled) | |
1621 | { | |
1622 | #if defined(TARGET_HAS_ICE) | |
1623 | if (env->singlestep_enabled != enabled) { | |
1624 | env->singlestep_enabled = enabled; | |
1625 | if (kvm_enabled()) | |
1626 | kvm_update_guest_debug(env, 0); | |
1627 | else { | |
1628 | /* must flush all the translated code to avoid inconsistencies */ | |
1629 | /* XXX: only flush what is necessary */ | |
1630 | tb_flush(env); | |
1631 | } | |
1632 | } | |
1633 | #endif | |
1634 | } | |
1635 | ||
1636 | /* enable or disable low levels log */ | |
1637 | void cpu_set_log(int log_flags) | |
1638 | { | |
1639 | loglevel = log_flags; | |
1640 | if (loglevel && !logfile) { | |
1641 | logfile = fopen(logfilename, log_append ? "a" : "w"); | |
1642 | if (!logfile) { | |
1643 | perror(logfilename); | |
1644 | _exit(1); | |
1645 | } | |
1646 | #if !defined(CONFIG_SOFTMMU) | |
1647 | /* must avoid mmap() usage of glibc by setting a buffer "by hand" */ | |
1648 | { | |
1649 | static char logfile_buf[4096]; | |
1650 | setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf)); | |
1651 | } | |
1652 | #elif defined(_WIN32) | |
1653 | /* Win32 doesn't support line-buffering, so use unbuffered output. */ | |
1654 | setvbuf(logfile, NULL, _IONBF, 0); | |
1655 | #else | |
1656 | setvbuf(logfile, NULL, _IOLBF, 0); | |
1657 | #endif | |
1658 | log_append = 1; | |
1659 | } | |
1660 | if (!loglevel && logfile) { | |
1661 | fclose(logfile); | |
1662 | logfile = NULL; | |
1663 | } | |
1664 | } | |
1665 | ||
1666 | void cpu_set_log_filename(const char *filename) | |
1667 | { | |
1668 | logfilename = strdup(filename); | |
1669 | if (logfile) { | |
1670 | fclose(logfile); | |
1671 | logfile = NULL; | |
1672 | } | |
1673 | cpu_set_log(loglevel); | |
1674 | } | |
1675 | ||
1676 | static void cpu_unlink_tb(CPUState *env) | |
1677 | { | |
1678 | /* FIXME: TB unchaining isn't SMP safe. For now just ignore the | |
1679 | problem and hope the cpu will stop of its own accord. For userspace | |
1680 | emulation this often isn't actually as bad as it sounds. Often | |
1681 | signals are used primarily to interrupt blocking syscalls. */ | |
1682 | TranslationBlock *tb; | |
1683 | static spinlock_t interrupt_lock = SPIN_LOCK_UNLOCKED; | |
1684 | ||
1685 | spin_lock(&interrupt_lock); | |
1686 | tb = env->current_tb; | |
1687 | /* if the cpu is currently executing code, we must unlink it and | |
1688 | all the potentially executing TB */ | |
1689 | if (tb) { | |
1690 | env->current_tb = NULL; | |
1691 | tb_reset_jump_recursive(tb); | |
1692 | } | |
1693 | spin_unlock(&interrupt_lock); | |
1694 | } | |
1695 | ||
1696 | #ifndef CONFIG_USER_ONLY | |
1697 | /* mask must never be zero, except for A20 change call */ | |
1698 | static void tcg_handle_interrupt(CPUState *env, int mask) | |
1699 | { | |
1700 | int old_mask; | |
1701 | ||
1702 | old_mask = env->interrupt_request; | |
1703 | env->interrupt_request |= mask; | |
1704 | ||
1705 | /* | |
1706 | * If called from iothread context, wake the target cpu in | |
1707 | * case its halted. | |
1708 | */ | |
1709 | if (!qemu_cpu_is_self(env)) { | |
1710 | qemu_cpu_kick(env); | |
1711 | return; | |
1712 | } | |
1713 | ||
1714 | if (use_icount) { | |
1715 | env->icount_decr.u16.high = 0xffff; | |
1716 | if (!can_do_io(env) | |
1717 | && (mask & ~old_mask) != 0) { | |
1718 | cpu_abort(env, "Raised interrupt while not in I/O function"); | |
1719 | } | |
1720 | } else { | |
1721 | cpu_unlink_tb(env); | |
1722 | } | |
1723 | } | |
1724 | ||
1725 | CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt; | |
1726 | ||
1727 | #else /* CONFIG_USER_ONLY */ | |
1728 | ||
1729 | void cpu_interrupt(CPUState *env, int mask) | |
1730 | { | |
1731 | env->interrupt_request |= mask; | |
1732 | cpu_unlink_tb(env); | |
1733 | } | |
1734 | #endif /* CONFIG_USER_ONLY */ | |
1735 | ||
1736 | void cpu_reset_interrupt(CPUState *env, int mask) | |
1737 | { | |
1738 | env->interrupt_request &= ~mask; | |
1739 | } | |
1740 | ||
1741 | void cpu_exit(CPUState *env) | |
1742 | { | |
1743 | env->exit_request = 1; | |
1744 | cpu_unlink_tb(env); | |
1745 | } | |
1746 | ||
1747 | const CPULogItem cpu_log_items[] = { | |
1748 | { CPU_LOG_TB_OUT_ASM, "out_asm", | |
1749 | "show generated host assembly code for each compiled TB" }, | |
1750 | { CPU_LOG_TB_IN_ASM, "in_asm", | |
1751 | "show target assembly code for each compiled TB" }, | |
1752 | { CPU_LOG_TB_OP, "op", | |
1753 | "show micro ops for each compiled TB" }, | |
1754 | { CPU_LOG_TB_OP_OPT, "op_opt", | |
1755 | "show micro ops " | |
1756 | #ifdef TARGET_I386 | |
1757 | "before eflags optimization and " | |
1758 | #endif | |
1759 | "after liveness analysis" }, | |
1760 | { CPU_LOG_INT, "int", | |
1761 | "show interrupts/exceptions in short format" }, | |
1762 | { CPU_LOG_EXEC, "exec", | |
1763 | "show trace before each executed TB (lots of logs)" }, | |
1764 | { CPU_LOG_TB_CPU, "cpu", | |
1765 | "show CPU state before block translation" }, | |
1766 | #ifdef TARGET_I386 | |
1767 | { CPU_LOG_PCALL, "pcall", | |
1768 | "show protected mode far calls/returns/exceptions" }, | |
1769 | { CPU_LOG_RESET, "cpu_reset", | |
1770 | "show CPU state before CPU resets" }, | |
1771 | #endif | |
1772 | #ifdef DEBUG_IOPORT | |
1773 | { CPU_LOG_IOPORT, "ioport", | |
1774 | "show all i/o ports accesses" }, | |
1775 | #endif | |
1776 | { 0, NULL, NULL }, | |
1777 | }; | |
1778 | ||
1779 | static int cmp1(const char *s1, int n, const char *s2) | |
1780 | { | |
1781 | if (strlen(s2) != n) | |
1782 | return 0; | |
1783 | return memcmp(s1, s2, n) == 0; | |
1784 | } | |
1785 | ||
1786 | /* takes a comma separated list of log masks. Return 0 if error. */ | |
1787 | int cpu_str_to_log_mask(const char *str) | |
1788 | { | |
1789 | const CPULogItem *item; | |
1790 | int mask; | |
1791 | const char *p, *p1; | |
1792 | ||
1793 | p = str; | |
1794 | mask = 0; | |
1795 | for(;;) { | |
1796 | p1 = strchr(p, ','); | |
1797 | if (!p1) | |
1798 | p1 = p + strlen(p); | |
1799 | if(cmp1(p,p1-p,"all")) { | |
1800 | for(item = cpu_log_items; item->mask != 0; item++) { | |
1801 | mask |= item->mask; | |
1802 | } | |
1803 | } else { | |
1804 | for(item = cpu_log_items; item->mask != 0; item++) { | |
1805 | if (cmp1(p, p1 - p, item->name)) | |
1806 | goto found; | |
1807 | } | |
1808 | return 0; | |
1809 | } | |
1810 | found: | |
1811 | mask |= item->mask; | |
1812 | if (*p1 != ',') | |
1813 | break; | |
1814 | p = p1 + 1; | |
1815 | } | |
1816 | return mask; | |
1817 | } | |
1818 | ||
1819 | void cpu_abort(CPUState *env, const char *fmt, ...) | |
1820 | { | |
1821 | va_list ap; | |
1822 | va_list ap2; | |
1823 | ||
1824 | va_start(ap, fmt); | |
1825 | va_copy(ap2, ap); | |
1826 | fprintf(stderr, "qemu: fatal: "); | |
1827 | vfprintf(stderr, fmt, ap); | |
1828 | fprintf(stderr, "\n"); | |
1829 | #ifdef TARGET_I386 | |
1830 | cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP); | |
1831 | #else | |
1832 | cpu_dump_state(env, stderr, fprintf, 0); | |
1833 | #endif | |
1834 | if (qemu_log_enabled()) { | |
1835 | qemu_log("qemu: fatal: "); | |
1836 | qemu_log_vprintf(fmt, ap2); | |
1837 | qemu_log("\n"); | |
1838 | #ifdef TARGET_I386 | |
1839 | log_cpu_state(env, X86_DUMP_FPU | X86_DUMP_CCOP); | |
1840 | #else | |
1841 | log_cpu_state(env, 0); | |
1842 | #endif | |
1843 | qemu_log_flush(); | |
1844 | qemu_log_close(); | |
1845 | } | |
1846 | va_end(ap2); | |
1847 | va_end(ap); | |
1848 | #if defined(CONFIG_USER_ONLY) | |
1849 | { | |
1850 | struct sigaction act; | |
1851 | sigfillset(&act.sa_mask); | |
1852 | act.sa_handler = SIG_DFL; | |
1853 | sigaction(SIGABRT, &act, NULL); | |
1854 | } | |
1855 | #endif | |
1856 | abort(); | |
1857 | } | |
1858 | ||
1859 | CPUState *cpu_copy(CPUState *env) | |
1860 | { | |
1861 | CPUState *new_env = cpu_init(env->cpu_model_str); | |
1862 | CPUState *next_cpu = new_env->next_cpu; | |
1863 | int cpu_index = new_env->cpu_index; | |
1864 | #if defined(TARGET_HAS_ICE) | |
1865 | CPUBreakpoint *bp; | |
1866 | CPUWatchpoint *wp; | |
1867 | #endif | |
1868 | ||
1869 | memcpy(new_env, env, sizeof(CPUState)); | |
1870 | ||
1871 | /* Preserve chaining and index. */ | |
1872 | new_env->next_cpu = next_cpu; | |
1873 | new_env->cpu_index = cpu_index; | |
1874 | ||
1875 | /* Clone all break/watchpoints. | |
1876 | Note: Once we support ptrace with hw-debug register access, make sure | |
1877 | BP_CPU break/watchpoints are handled correctly on clone. */ | |
1878 | QTAILQ_INIT(&env->breakpoints); | |
1879 | QTAILQ_INIT(&env->watchpoints); | |
1880 | #if defined(TARGET_HAS_ICE) | |
1881 | QTAILQ_FOREACH(bp, &env->breakpoints, entry) { | |
1882 | cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL); | |
1883 | } | |
1884 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
1885 | cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1, | |
1886 | wp->flags, NULL); | |
1887 | } | |
1888 | #endif | |
1889 | ||
1890 | return new_env; | |
1891 | } | |
1892 | ||
1893 | #if !defined(CONFIG_USER_ONLY) | |
1894 | ||
1895 | static inline void tlb_flush_jmp_cache(CPUState *env, target_ulong addr) | |
1896 | { | |
1897 | unsigned int i; | |
1898 | ||
1899 | /* Discard jump cache entries for any tb which might potentially | |
1900 | overlap the flushed page. */ | |
1901 | i = tb_jmp_cache_hash_page(addr - TARGET_PAGE_SIZE); | |
1902 | memset (&env->tb_jmp_cache[i], 0, | |
1903 | TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *)); | |
1904 | ||
1905 | i = tb_jmp_cache_hash_page(addr); | |
1906 | memset (&env->tb_jmp_cache[i], 0, | |
1907 | TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *)); | |
1908 | } | |
1909 | ||
1910 | static CPUTLBEntry s_cputlb_empty_entry = { | |
1911 | .addr_read = -1, | |
1912 | .addr_write = -1, | |
1913 | .addr_code = -1, | |
1914 | .addend = -1, | |
1915 | }; | |
1916 | ||
1917 | /* NOTE: | |
1918 | * If flush_global is true (the usual case), flush all tlb entries. | |
1919 | * If flush_global is false, flush (at least) all tlb entries not | |
1920 | * marked global. | |
1921 | * | |
1922 | * Since QEMU doesn't currently implement a global/not-global flag | |
1923 | * for tlb entries, at the moment tlb_flush() will also flush all | |
1924 | * tlb entries in the flush_global == false case. This is OK because | |
1925 | * CPU architectures generally permit an implementation to drop | |
1926 | * entries from the TLB at any time, so flushing more entries than | |
1927 | * required is only an efficiency issue, not a correctness issue. | |
1928 | */ | |
1929 | void tlb_flush(CPUState *env, int flush_global) | |
1930 | { | |
1931 | int i; | |
1932 | ||
1933 | #if defined(DEBUG_TLB) | |
1934 | printf("tlb_flush:\n"); | |
1935 | #endif | |
1936 | /* must reset current TB so that interrupts cannot modify the | |
1937 | links while we are modifying them */ | |
1938 | env->current_tb = NULL; | |
1939 | ||
1940 | for(i = 0; i < CPU_TLB_SIZE; i++) { | |
1941 | int mmu_idx; | |
1942 | for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { | |
1943 | env->tlb_table[mmu_idx][i] = s_cputlb_empty_entry; | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); | |
1948 | ||
1949 | env->tlb_flush_addr = -1; | |
1950 | env->tlb_flush_mask = 0; | |
1951 | tlb_flush_count++; | |
1952 | } | |
1953 | ||
1954 | static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr) | |
1955 | { | |
1956 | if (addr == (tlb_entry->addr_read & | |
1957 | (TARGET_PAGE_MASK | TLB_INVALID_MASK)) || | |
1958 | addr == (tlb_entry->addr_write & | |
1959 | (TARGET_PAGE_MASK | TLB_INVALID_MASK)) || | |
1960 | addr == (tlb_entry->addr_code & | |
1961 | (TARGET_PAGE_MASK | TLB_INVALID_MASK))) { | |
1962 | *tlb_entry = s_cputlb_empty_entry; | |
1963 | } | |
1964 | } | |
1965 | ||
1966 | void tlb_flush_page(CPUState *env, target_ulong addr) | |
1967 | { | |
1968 | int i; | |
1969 | int mmu_idx; | |
1970 | ||
1971 | #if defined(DEBUG_TLB) | |
1972 | printf("tlb_flush_page: " TARGET_FMT_lx "\n", addr); | |
1973 | #endif | |
1974 | /* Check if we need to flush due to large pages. */ | |
1975 | if ((addr & env->tlb_flush_mask) == env->tlb_flush_addr) { | |
1976 | #if defined(DEBUG_TLB) | |
1977 | printf("tlb_flush_page: forced full flush (" | |
1978 | TARGET_FMT_lx "/" TARGET_FMT_lx ")\n", | |
1979 | env->tlb_flush_addr, env->tlb_flush_mask); | |
1980 | #endif | |
1981 | tlb_flush(env, 1); | |
1982 | return; | |
1983 | } | |
1984 | /* must reset current TB so that interrupts cannot modify the | |
1985 | links while we are modifying them */ | |
1986 | env->current_tb = NULL; | |
1987 | ||
1988 | addr &= TARGET_PAGE_MASK; | |
1989 | i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
1990 | for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) | |
1991 | tlb_flush_entry(&env->tlb_table[mmu_idx][i], addr); | |
1992 | ||
1993 | tlb_flush_jmp_cache(env, addr); | |
1994 | } | |
1995 | ||
1996 | /* update the TLBs so that writes to code in the virtual page 'addr' | |
1997 | can be detected */ | |
1998 | static void tlb_protect_code(ram_addr_t ram_addr) | |
1999 | { | |
2000 | cpu_physical_memory_reset_dirty(ram_addr, | |
2001 | ram_addr + TARGET_PAGE_SIZE, | |
2002 | CODE_DIRTY_FLAG); | |
2003 | } | |
2004 | ||
2005 | /* update the TLB so that writes in physical page 'phys_addr' are no longer | |
2006 | tested for self modifying code */ | |
2007 | static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr, | |
2008 | target_ulong vaddr) | |
2009 | { | |
2010 | cpu_physical_memory_set_dirty_flags(ram_addr, CODE_DIRTY_FLAG); | |
2011 | } | |
2012 | ||
2013 | static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry, | |
2014 | unsigned long start, unsigned long length) | |
2015 | { | |
2016 | unsigned long addr; | |
2017 | if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == io_mem_ram.ram_addr) { | |
2018 | addr = (tlb_entry->addr_write & TARGET_PAGE_MASK) + tlb_entry->addend; | |
2019 | if ((addr - start) < length) { | |
2020 | tlb_entry->addr_write = (tlb_entry->addr_write & TARGET_PAGE_MASK) | TLB_NOTDIRTY; | |
2021 | } | |
2022 | } | |
2023 | } | |
2024 | ||
2025 | /* Note: start and end must be within the same ram block. */ | |
2026 | void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end, | |
2027 | int dirty_flags) | |
2028 | { | |
2029 | CPUState *env; | |
2030 | unsigned long length, start1; | |
2031 | int i; | |
2032 | ||
2033 | start &= TARGET_PAGE_MASK; | |
2034 | end = TARGET_PAGE_ALIGN(end); | |
2035 | ||
2036 | length = end - start; | |
2037 | if (length == 0) | |
2038 | return; | |
2039 | cpu_physical_memory_mask_dirty_range(start, length, dirty_flags); | |
2040 | ||
2041 | /* we modify the TLB cache so that the dirty bit will be set again | |
2042 | when accessing the range */ | |
2043 | start1 = (unsigned long)qemu_safe_ram_ptr(start); | |
2044 | /* Check that we don't span multiple blocks - this breaks the | |
2045 | address comparisons below. */ | |
2046 | if ((unsigned long)qemu_safe_ram_ptr(end - 1) - start1 | |
2047 | != (end - 1) - start) { | |
2048 | abort(); | |
2049 | } | |
2050 | ||
2051 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
2052 | int mmu_idx; | |
2053 | for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { | |
2054 | for(i = 0; i < CPU_TLB_SIZE; i++) | |
2055 | tlb_reset_dirty_range(&env->tlb_table[mmu_idx][i], | |
2056 | start1, length); | |
2057 | } | |
2058 | } | |
2059 | } | |
2060 | ||
2061 | int cpu_physical_memory_set_dirty_tracking(int enable) | |
2062 | { | |
2063 | int ret = 0; | |
2064 | in_migration = enable; | |
2065 | return ret; | |
2066 | } | |
2067 | ||
2068 | static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry) | |
2069 | { | |
2070 | ram_addr_t ram_addr; | |
2071 | void *p; | |
2072 | ||
2073 | if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == io_mem_ram.ram_addr) { | |
2074 | p = (void *)(unsigned long)((tlb_entry->addr_write & TARGET_PAGE_MASK) | |
2075 | + tlb_entry->addend); | |
2076 | ram_addr = qemu_ram_addr_from_host_nofail(p); | |
2077 | if (!cpu_physical_memory_is_dirty(ram_addr)) { | |
2078 | tlb_entry->addr_write |= TLB_NOTDIRTY; | |
2079 | } | |
2080 | } | |
2081 | } | |
2082 | ||
2083 | /* update the TLB according to the current state of the dirty bits */ | |
2084 | void cpu_tlb_update_dirty(CPUState *env) | |
2085 | { | |
2086 | int i; | |
2087 | int mmu_idx; | |
2088 | for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { | |
2089 | for(i = 0; i < CPU_TLB_SIZE; i++) | |
2090 | tlb_update_dirty(&env->tlb_table[mmu_idx][i]); | |
2091 | } | |
2092 | } | |
2093 | ||
2094 | static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, target_ulong vaddr) | |
2095 | { | |
2096 | if (tlb_entry->addr_write == (vaddr | TLB_NOTDIRTY)) | |
2097 | tlb_entry->addr_write = vaddr; | |
2098 | } | |
2099 | ||
2100 | /* update the TLB corresponding to virtual page vaddr | |
2101 | so that it is no longer dirty */ | |
2102 | static inline void tlb_set_dirty(CPUState *env, target_ulong vaddr) | |
2103 | { | |
2104 | int i; | |
2105 | int mmu_idx; | |
2106 | ||
2107 | vaddr &= TARGET_PAGE_MASK; | |
2108 | i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
2109 | for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) | |
2110 | tlb_set_dirty1(&env->tlb_table[mmu_idx][i], vaddr); | |
2111 | } | |
2112 | ||
2113 | /* Our TLB does not support large pages, so remember the area covered by | |
2114 | large pages and trigger a full TLB flush if these are invalidated. */ | |
2115 | static void tlb_add_large_page(CPUState *env, target_ulong vaddr, | |
2116 | target_ulong size) | |
2117 | { | |
2118 | target_ulong mask = ~(size - 1); | |
2119 | ||
2120 | if (env->tlb_flush_addr == (target_ulong)-1) { | |
2121 | env->tlb_flush_addr = vaddr & mask; | |
2122 | env->tlb_flush_mask = mask; | |
2123 | return; | |
2124 | } | |
2125 | /* Extend the existing region to include the new page. | |
2126 | This is a compromise between unnecessary flushes and the cost | |
2127 | of maintaining a full variable size TLB. */ | |
2128 | mask &= env->tlb_flush_mask; | |
2129 | while (((env->tlb_flush_addr ^ vaddr) & mask) != 0) { | |
2130 | mask <<= 1; | |
2131 | } | |
2132 | env->tlb_flush_addr &= mask; | |
2133 | env->tlb_flush_mask = mask; | |
2134 | } | |
2135 | ||
2136 | static bool is_ram_rom(MemoryRegionSection *s) | |
2137 | { | |
2138 | return memory_region_is_ram(s->mr); | |
2139 | } | |
2140 | ||
2141 | static bool is_romd(MemoryRegionSection *s) | |
2142 | { | |
2143 | MemoryRegion *mr = s->mr; | |
2144 | ||
2145 | return mr->rom_device && mr->readable; | |
2146 | } | |
2147 | ||
2148 | static bool is_ram_rom_romd(MemoryRegionSection *s) | |
2149 | { | |
2150 | return is_ram_rom(s) || is_romd(s); | |
2151 | } | |
2152 | ||
2153 | /* Add a new TLB entry. At most one entry for a given virtual address | |
2154 | is permitted. Only a single TARGET_PAGE_SIZE region is mapped, the | |
2155 | supplied size is only used by tlb_flush_page. */ | |
2156 | void tlb_set_page(CPUState *env, target_ulong vaddr, | |
2157 | target_phys_addr_t paddr, int prot, | |
2158 | int mmu_idx, target_ulong size) | |
2159 | { | |
2160 | MemoryRegionSection section; | |
2161 | unsigned int index; | |
2162 | target_ulong address; | |
2163 | target_ulong code_address; | |
2164 | unsigned long addend; | |
2165 | CPUTLBEntry *te; | |
2166 | CPUWatchpoint *wp; | |
2167 | target_phys_addr_t iotlb; | |
2168 | ||
2169 | assert(size >= TARGET_PAGE_SIZE); | |
2170 | if (size != TARGET_PAGE_SIZE) { | |
2171 | tlb_add_large_page(env, vaddr, size); | |
2172 | } | |
2173 | section = phys_page_find(paddr >> TARGET_PAGE_BITS); | |
2174 | #if defined(DEBUG_TLB) | |
2175 | printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x" TARGET_FMT_plx | |
2176 | " prot=%x idx=%d pd=0x%08lx\n", | |
2177 | vaddr, paddr, prot, mmu_idx, pd); | |
2178 | #endif | |
2179 | ||
2180 | address = vaddr; | |
2181 | if (!is_ram_rom_romd(§ion)) { | |
2182 | /* IO memory case (romd handled later) */ | |
2183 | address |= TLB_MMIO; | |
2184 | } | |
2185 | if (is_ram_rom_romd(§ion)) { | |
2186 | addend = (unsigned long)(memory_region_get_ram_ptr(section.mr) | |
2187 | + section.offset_within_region); | |
2188 | } else { | |
2189 | addend = 0; | |
2190 | } | |
2191 | if (is_ram_rom(§ion)) { | |
2192 | /* Normal RAM. */ | |
2193 | iotlb = (memory_region_get_ram_addr(section.mr) | |
2194 | + section.offset_within_region) & TARGET_PAGE_MASK; | |
2195 | if (!section.readonly) | |
2196 | iotlb |= io_mem_notdirty.ram_addr; | |
2197 | else | |
2198 | iotlb |= io_mem_rom.ram_addr; | |
2199 | } else { | |
2200 | /* IO handlers are currently passed a physical address. | |
2201 | It would be nice to pass an offset from the base address | |
2202 | of that region. This would avoid having to special case RAM, | |
2203 | and avoid full address decoding in every device. | |
2204 | We can't use the high bits of pd for this because | |
2205 | IO_MEM_ROMD uses these as a ram address. */ | |
2206 | iotlb = memory_region_get_ram_addr(section.mr) & ~TARGET_PAGE_MASK; | |
2207 | iotlb += section.offset_within_region; | |
2208 | } | |
2209 | ||
2210 | code_address = address; | |
2211 | /* Make accesses to pages with watchpoints go via the | |
2212 | watchpoint trap routines. */ | |
2213 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
2214 | if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) { | |
2215 | /* Avoid trapping reads of pages with a write breakpoint. */ | |
2216 | if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) { | |
2217 | iotlb = io_mem_watch.ram_addr + paddr; | |
2218 | address |= TLB_MMIO; | |
2219 | break; | |
2220 | } | |
2221 | } | |
2222 | } | |
2223 | ||
2224 | index = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
2225 | env->iotlb[mmu_idx][index] = iotlb - vaddr; | |
2226 | te = &env->tlb_table[mmu_idx][index]; | |
2227 | te->addend = addend - vaddr; | |
2228 | if (prot & PAGE_READ) { | |
2229 | te->addr_read = address; | |
2230 | } else { | |
2231 | te->addr_read = -1; | |
2232 | } | |
2233 | ||
2234 | if (prot & PAGE_EXEC) { | |
2235 | te->addr_code = code_address; | |
2236 | } else { | |
2237 | te->addr_code = -1; | |
2238 | } | |
2239 | if (prot & PAGE_WRITE) { | |
2240 | if ((memory_region_is_ram(section.mr) && section.readonly) | |
2241 | || is_romd(§ion)) { | |
2242 | /* Write access calls the I/O callback. */ | |
2243 | te->addr_write = address | TLB_MMIO; | |
2244 | } else if (memory_region_is_ram(section.mr) | |
2245 | && !cpu_physical_memory_is_dirty( | |
2246 | section.mr->ram_addr | |
2247 | + section.offset_within_region)) { | |
2248 | te->addr_write = address | TLB_NOTDIRTY; | |
2249 | } else { | |
2250 | te->addr_write = address; | |
2251 | } | |
2252 | } else { | |
2253 | te->addr_write = -1; | |
2254 | } | |
2255 | } | |
2256 | ||
2257 | #else | |
2258 | ||
2259 | void tlb_flush(CPUState *env, int flush_global) | |
2260 | { | |
2261 | } | |
2262 | ||
2263 | void tlb_flush_page(CPUState *env, target_ulong addr) | |
2264 | { | |
2265 | } | |
2266 | ||
2267 | /* | |
2268 | * Walks guest process memory "regions" one by one | |
2269 | * and calls callback function 'fn' for each region. | |
2270 | */ | |
2271 | ||
2272 | struct walk_memory_regions_data | |
2273 | { | |
2274 | walk_memory_regions_fn fn; | |
2275 | void *priv; | |
2276 | unsigned long start; | |
2277 | int prot; | |
2278 | }; | |
2279 | ||
2280 | static int walk_memory_regions_end(struct walk_memory_regions_data *data, | |
2281 | abi_ulong end, int new_prot) | |
2282 | { | |
2283 | if (data->start != -1ul) { | |
2284 | int rc = data->fn(data->priv, data->start, end, data->prot); | |
2285 | if (rc != 0) { | |
2286 | return rc; | |
2287 | } | |
2288 | } | |
2289 | ||
2290 | data->start = (new_prot ? end : -1ul); | |
2291 | data->prot = new_prot; | |
2292 | ||
2293 | return 0; | |
2294 | } | |
2295 | ||
2296 | static int walk_memory_regions_1(struct walk_memory_regions_data *data, | |
2297 | abi_ulong base, int level, void **lp) | |
2298 | { | |
2299 | abi_ulong pa; | |
2300 | int i, rc; | |
2301 | ||
2302 | if (*lp == NULL) { | |
2303 | return walk_memory_regions_end(data, base, 0); | |
2304 | } | |
2305 | ||
2306 | if (level == 0) { | |
2307 | PageDesc *pd = *lp; | |
2308 | for (i = 0; i < L2_SIZE; ++i) { | |
2309 | int prot = pd[i].flags; | |
2310 | ||
2311 | pa = base | (i << TARGET_PAGE_BITS); | |
2312 | if (prot != data->prot) { | |
2313 | rc = walk_memory_regions_end(data, pa, prot); | |
2314 | if (rc != 0) { | |
2315 | return rc; | |
2316 | } | |
2317 | } | |
2318 | } | |
2319 | } else { | |
2320 | void **pp = *lp; | |
2321 | for (i = 0; i < L2_SIZE; ++i) { | |
2322 | pa = base | ((abi_ulong)i << | |
2323 | (TARGET_PAGE_BITS + L2_BITS * level)); | |
2324 | rc = walk_memory_regions_1(data, pa, level - 1, pp + i); | |
2325 | if (rc != 0) { | |
2326 | return rc; | |
2327 | } | |
2328 | } | |
2329 | } | |
2330 | ||
2331 | return 0; | |
2332 | } | |
2333 | ||
2334 | int walk_memory_regions(void *priv, walk_memory_regions_fn fn) | |
2335 | { | |
2336 | struct walk_memory_regions_data data; | |
2337 | unsigned long i; | |
2338 | ||
2339 | data.fn = fn; | |
2340 | data.priv = priv; | |
2341 | data.start = -1ul; | |
2342 | data.prot = 0; | |
2343 | ||
2344 | for (i = 0; i < V_L1_SIZE; i++) { | |
2345 | int rc = walk_memory_regions_1(&data, (abi_ulong)i << V_L1_SHIFT, | |
2346 | V_L1_SHIFT / L2_BITS - 1, l1_map + i); | |
2347 | if (rc != 0) { | |
2348 | return rc; | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | return walk_memory_regions_end(&data, 0, 0); | |
2353 | } | |
2354 | ||
2355 | static int dump_region(void *priv, abi_ulong start, | |
2356 | abi_ulong end, unsigned long prot) | |
2357 | { | |
2358 | FILE *f = (FILE *)priv; | |
2359 | ||
2360 | (void) fprintf(f, TARGET_ABI_FMT_lx"-"TARGET_ABI_FMT_lx | |
2361 | " "TARGET_ABI_FMT_lx" %c%c%c\n", | |
2362 | start, end, end - start, | |
2363 | ((prot & PAGE_READ) ? 'r' : '-'), | |
2364 | ((prot & PAGE_WRITE) ? 'w' : '-'), | |
2365 | ((prot & PAGE_EXEC) ? 'x' : '-')); | |
2366 | ||
2367 | return (0); | |
2368 | } | |
2369 | ||
2370 | /* dump memory mappings */ | |
2371 | void page_dump(FILE *f) | |
2372 | { | |
2373 | (void) fprintf(f, "%-8s %-8s %-8s %s\n", | |
2374 | "start", "end", "size", "prot"); | |
2375 | walk_memory_regions(f, dump_region); | |
2376 | } | |
2377 | ||
2378 | int page_get_flags(target_ulong address) | |
2379 | { | |
2380 | PageDesc *p; | |
2381 | ||
2382 | p = page_find(address >> TARGET_PAGE_BITS); | |
2383 | if (!p) | |
2384 | return 0; | |
2385 | return p->flags; | |
2386 | } | |
2387 | ||
2388 | /* Modify the flags of a page and invalidate the code if necessary. | |
2389 | The flag PAGE_WRITE_ORG is positioned automatically depending | |
2390 | on PAGE_WRITE. The mmap_lock should already be held. */ | |
2391 | void page_set_flags(target_ulong start, target_ulong end, int flags) | |
2392 | { | |
2393 | target_ulong addr, len; | |
2394 | ||
2395 | /* This function should never be called with addresses outside the | |
2396 | guest address space. If this assert fires, it probably indicates | |
2397 | a missing call to h2g_valid. */ | |
2398 | #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS | |
2399 | assert(end < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS)); | |
2400 | #endif | |
2401 | assert(start < end); | |
2402 | ||
2403 | start = start & TARGET_PAGE_MASK; | |
2404 | end = TARGET_PAGE_ALIGN(end); | |
2405 | ||
2406 | if (flags & PAGE_WRITE) { | |
2407 | flags |= PAGE_WRITE_ORG; | |
2408 | } | |
2409 | ||
2410 | for (addr = start, len = end - start; | |
2411 | len != 0; | |
2412 | len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { | |
2413 | PageDesc *p = page_find_alloc(addr >> TARGET_PAGE_BITS, 1); | |
2414 | ||
2415 | /* If the write protection bit is set, then we invalidate | |
2416 | the code inside. */ | |
2417 | if (!(p->flags & PAGE_WRITE) && | |
2418 | (flags & PAGE_WRITE) && | |
2419 | p->first_tb) { | |
2420 | tb_invalidate_phys_page(addr, 0, NULL); | |
2421 | } | |
2422 | p->flags = flags; | |
2423 | } | |
2424 | } | |
2425 | ||
2426 | int page_check_range(target_ulong start, target_ulong len, int flags) | |
2427 | { | |
2428 | PageDesc *p; | |
2429 | target_ulong end; | |
2430 | target_ulong addr; | |
2431 | ||
2432 | /* This function should never be called with addresses outside the | |
2433 | guest address space. If this assert fires, it probably indicates | |
2434 | a missing call to h2g_valid. */ | |
2435 | #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS | |
2436 | assert(start < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS)); | |
2437 | #endif | |
2438 | ||
2439 | if (len == 0) { | |
2440 | return 0; | |
2441 | } | |
2442 | if (start + len - 1 < start) { | |
2443 | /* We've wrapped around. */ | |
2444 | return -1; | |
2445 | } | |
2446 | ||
2447 | end = TARGET_PAGE_ALIGN(start+len); /* must do before we loose bits in the next step */ | |
2448 | start = start & TARGET_PAGE_MASK; | |
2449 | ||
2450 | for (addr = start, len = end - start; | |
2451 | len != 0; | |
2452 | len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { | |
2453 | p = page_find(addr >> TARGET_PAGE_BITS); | |
2454 | if( !p ) | |
2455 | return -1; | |
2456 | if( !(p->flags & PAGE_VALID) ) | |
2457 | return -1; | |
2458 | ||
2459 | if ((flags & PAGE_READ) && !(p->flags & PAGE_READ)) | |
2460 | return -1; | |
2461 | if (flags & PAGE_WRITE) { | |
2462 | if (!(p->flags & PAGE_WRITE_ORG)) | |
2463 | return -1; | |
2464 | /* unprotect the page if it was put read-only because it | |
2465 | contains translated code */ | |
2466 | if (!(p->flags & PAGE_WRITE)) { | |
2467 | if (!page_unprotect(addr, 0, NULL)) | |
2468 | return -1; | |
2469 | } | |
2470 | return 0; | |
2471 | } | |
2472 | } | |
2473 | return 0; | |
2474 | } | |
2475 | ||
2476 | /* called from signal handler: invalidate the code and unprotect the | |
2477 | page. Return TRUE if the fault was successfully handled. */ | |
2478 | int page_unprotect(target_ulong address, unsigned long pc, void *puc) | |
2479 | { | |
2480 | unsigned int prot; | |
2481 | PageDesc *p; | |
2482 | target_ulong host_start, host_end, addr; | |
2483 | ||
2484 | /* Technically this isn't safe inside a signal handler. However we | |
2485 | know this only ever happens in a synchronous SEGV handler, so in | |
2486 | practice it seems to be ok. */ | |
2487 | mmap_lock(); | |
2488 | ||
2489 | p = page_find(address >> TARGET_PAGE_BITS); | |
2490 | if (!p) { | |
2491 | mmap_unlock(); | |
2492 | return 0; | |
2493 | } | |
2494 | ||
2495 | /* if the page was really writable, then we change its | |
2496 | protection back to writable */ | |
2497 | if ((p->flags & PAGE_WRITE_ORG) && !(p->flags & PAGE_WRITE)) { | |
2498 | host_start = address & qemu_host_page_mask; | |
2499 | host_end = host_start + qemu_host_page_size; | |
2500 | ||
2501 | prot = 0; | |
2502 | for (addr = host_start ; addr < host_end ; addr += TARGET_PAGE_SIZE) { | |
2503 | p = page_find(addr >> TARGET_PAGE_BITS); | |
2504 | p->flags |= PAGE_WRITE; | |
2505 | prot |= p->flags; | |
2506 | ||
2507 | /* and since the content will be modified, we must invalidate | |
2508 | the corresponding translated code. */ | |
2509 | tb_invalidate_phys_page(addr, pc, puc); | |
2510 | #ifdef DEBUG_TB_CHECK | |
2511 | tb_invalidate_check(addr); | |
2512 | #endif | |
2513 | } | |
2514 | mprotect((void *)g2h(host_start), qemu_host_page_size, | |
2515 | prot & PAGE_BITS); | |
2516 | ||
2517 | mmap_unlock(); | |
2518 | return 1; | |
2519 | } | |
2520 | mmap_unlock(); | |
2521 | return 0; | |
2522 | } | |
2523 | ||
2524 | static inline void tlb_set_dirty(CPUState *env, | |
2525 | unsigned long addr, target_ulong vaddr) | |
2526 | { | |
2527 | } | |
2528 | #endif /* defined(CONFIG_USER_ONLY) */ | |
2529 | ||
2530 | #if !defined(CONFIG_USER_ONLY) | |
2531 | ||
2532 | #define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK) | |
2533 | typedef struct subpage_t { | |
2534 | MemoryRegion iomem; | |
2535 | target_phys_addr_t base; | |
2536 | uint16_t sub_section[TARGET_PAGE_SIZE]; | |
2537 | } subpage_t; | |
2538 | ||
2539 | static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, | |
2540 | uint16_t section); | |
2541 | static subpage_t *subpage_init(target_phys_addr_t base); | |
2542 | static void destroy_page_desc(uint16_t section_index) | |
2543 | { | |
2544 | MemoryRegionSection *section = &phys_sections[section_index]; | |
2545 | MemoryRegion *mr = section->mr; | |
2546 | ||
2547 | if (mr->subpage) { | |
2548 | subpage_t *subpage = container_of(mr, subpage_t, iomem); | |
2549 | memory_region_destroy(&subpage->iomem); | |
2550 | g_free(subpage); | |
2551 | } | |
2552 | } | |
2553 | ||
2554 | static void destroy_l2_mapping(PhysPageEntry *lp, unsigned level) | |
2555 | { | |
2556 | unsigned i; | |
2557 | PhysPageEntry *p; | |
2558 | ||
2559 | if (lp->u.node == PHYS_MAP_NODE_NIL) { | |
2560 | return; | |
2561 | } | |
2562 | ||
2563 | p = phys_map_nodes[lp->u.node]; | |
2564 | for (i = 0; i < L2_SIZE; ++i) { | |
2565 | if (level > 0) { | |
2566 | destroy_l2_mapping(&p[i], level - 1); | |
2567 | } else { | |
2568 | destroy_page_desc(p[i].u.leaf); | |
2569 | } | |
2570 | } | |
2571 | lp->u.node = PHYS_MAP_NODE_NIL; | |
2572 | } | |
2573 | ||
2574 | static void destroy_all_mappings(void) | |
2575 | { | |
2576 | destroy_l2_mapping(&phys_map, P_L2_LEVELS - 1); | |
2577 | phys_map_nodes_reset(); | |
2578 | } | |
2579 | ||
2580 | static uint16_t phys_section_add(MemoryRegionSection *section) | |
2581 | { | |
2582 | if (phys_sections_nb == phys_sections_nb_alloc) { | |
2583 | phys_sections_nb_alloc = MAX(phys_sections_nb_alloc * 2, 16); | |
2584 | phys_sections = g_renew(MemoryRegionSection, phys_sections, | |
2585 | phys_sections_nb_alloc); | |
2586 | } | |
2587 | phys_sections[phys_sections_nb] = *section; | |
2588 | return phys_sections_nb++; | |
2589 | } | |
2590 | ||
2591 | static void phys_sections_clear(void) | |
2592 | { | |
2593 | phys_sections_nb = 0; | |
2594 | } | |
2595 | ||
2596 | /* register physical memory. | |
2597 | For RAM, 'size' must be a multiple of the target page size. | |
2598 | If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an | |
2599 | io memory page. The address used when calling the IO function is | |
2600 | the offset from the start of the region, plus region_offset. Both | |
2601 | start_addr and region_offset are rounded down to a page boundary | |
2602 | before calculating this offset. This should not be a problem unless | |
2603 | the low bits of start_addr and region_offset differ. */ | |
2604 | static void register_subpage(MemoryRegionSection *section) | |
2605 | { | |
2606 | subpage_t *subpage; | |
2607 | target_phys_addr_t base = section->offset_within_address_space | |
2608 | & TARGET_PAGE_MASK; | |
2609 | MemoryRegionSection existing = phys_page_find(base >> TARGET_PAGE_BITS); | |
2610 | MemoryRegionSection subsection = { | |
2611 | .offset_within_address_space = base, | |
2612 | .size = TARGET_PAGE_SIZE, | |
2613 | }; | |
2614 | uint16_t *ptr; | |
2615 | target_phys_addr_t start, end; | |
2616 | ||
2617 | assert(existing.mr->subpage || existing.mr == &io_mem_unassigned); | |
2618 | ||
2619 | if (!(existing.mr->subpage)) { | |
2620 | subpage = subpage_init(base); | |
2621 | subsection.mr = &subpage->iomem; | |
2622 | ptr = phys_page_find_alloc(base >> TARGET_PAGE_BITS, 1); | |
2623 | *ptr = phys_section_add(&subsection); | |
2624 | } else { | |
2625 | subpage = container_of(existing.mr, subpage_t, iomem); | |
2626 | } | |
2627 | start = section->offset_within_address_space & ~TARGET_PAGE_MASK; | |
2628 | end = start + section->size; | |
2629 | subpage_register(subpage, start, end, phys_section_add(section)); | |
2630 | } | |
2631 | ||
2632 | ||
2633 | static void register_multipage(MemoryRegionSection *section) | |
2634 | { | |
2635 | target_phys_addr_t start_addr = section->offset_within_address_space; | |
2636 | ram_addr_t size = section->size; | |
2637 | target_phys_addr_t addr, end_addr; | |
2638 | uint16_t section_index = phys_section_add(section); | |
2639 | ||
2640 | assert(size); | |
2641 | ||
2642 | end_addr = start_addr + (target_phys_addr_t)size; | |
2643 | ||
2644 | addr = start_addr; | |
2645 | do { | |
2646 | uint16_t *p = phys_page_find_alloc(addr >> TARGET_PAGE_BITS, 1); | |
2647 | assert(*p == phys_section_unassigned); | |
2648 | *p = section_index; | |
2649 | addr += TARGET_PAGE_SIZE; | |
2650 | } while (addr != end_addr); | |
2651 | } | |
2652 | ||
2653 | void cpu_register_physical_memory_log(MemoryRegionSection *section, | |
2654 | bool readonly) | |
2655 | { | |
2656 | MemoryRegionSection now = *section, remain = *section; | |
2657 | ||
2658 | if ((now.offset_within_address_space & ~TARGET_PAGE_MASK) | |
2659 | || (now.size < TARGET_PAGE_SIZE)) { | |
2660 | now.size = MIN(TARGET_PAGE_ALIGN(now.offset_within_address_space) | |
2661 | - now.offset_within_address_space, | |
2662 | now.size); | |
2663 | register_subpage(&now); | |
2664 | remain.size -= now.size; | |
2665 | remain.offset_within_address_space += now.size; | |
2666 | remain.offset_within_region += now.size; | |
2667 | } | |
2668 | now = remain; | |
2669 | now.size &= TARGET_PAGE_MASK; | |
2670 | if (now.size) { | |
2671 | register_multipage(&now); | |
2672 | remain.size -= now.size; | |
2673 | remain.offset_within_address_space += now.size; | |
2674 | remain.offset_within_region += now.size; | |
2675 | } | |
2676 | now = remain; | |
2677 | if (now.size) { | |
2678 | register_subpage(&now); | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | ||
2683 | void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size) | |
2684 | { | |
2685 | if (kvm_enabled()) | |
2686 | kvm_coalesce_mmio_region(addr, size); | |
2687 | } | |
2688 | ||
2689 | void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size) | |
2690 | { | |
2691 | if (kvm_enabled()) | |
2692 | kvm_uncoalesce_mmio_region(addr, size); | |
2693 | } | |
2694 | ||
2695 | void qemu_flush_coalesced_mmio_buffer(void) | |
2696 | { | |
2697 | if (kvm_enabled()) | |
2698 | kvm_flush_coalesced_mmio_buffer(); | |
2699 | } | |
2700 | ||
2701 | #if defined(__linux__) && !defined(TARGET_S390X) | |
2702 | ||
2703 | #include <sys/vfs.h> | |
2704 | ||
2705 | #define HUGETLBFS_MAGIC 0x958458f6 | |
2706 | ||
2707 | static long gethugepagesize(const char *path) | |
2708 | { | |
2709 | struct statfs fs; | |
2710 | int ret; | |
2711 | ||
2712 | do { | |
2713 | ret = statfs(path, &fs); | |
2714 | } while (ret != 0 && errno == EINTR); | |
2715 | ||
2716 | if (ret != 0) { | |
2717 | perror(path); | |
2718 | return 0; | |
2719 | } | |
2720 | ||
2721 | if (fs.f_type != HUGETLBFS_MAGIC) | |
2722 | fprintf(stderr, "Warning: path not on HugeTLBFS: %s\n", path); | |
2723 | ||
2724 | return fs.f_bsize; | |
2725 | } | |
2726 | ||
2727 | static void *file_ram_alloc(RAMBlock *block, | |
2728 | ram_addr_t memory, | |
2729 | const char *path) | |
2730 | { | |
2731 | char *filename; | |
2732 | void *area; | |
2733 | int fd; | |
2734 | #ifdef MAP_POPULATE | |
2735 | int flags; | |
2736 | #endif | |
2737 | unsigned long hpagesize; | |
2738 | ||
2739 | hpagesize = gethugepagesize(path); | |
2740 | if (!hpagesize) { | |
2741 | return NULL; | |
2742 | } | |
2743 | ||
2744 | if (memory < hpagesize) { | |
2745 | return NULL; | |
2746 | } | |
2747 | ||
2748 | if (kvm_enabled() && !kvm_has_sync_mmu()) { | |
2749 | fprintf(stderr, "host lacks kvm mmu notifiers, -mem-path unsupported\n"); | |
2750 | return NULL; | |
2751 | } | |
2752 | ||
2753 | if (asprintf(&filename, "%s/qemu_back_mem.XXXXXX", path) == -1) { | |
2754 | return NULL; | |
2755 | } | |
2756 | ||
2757 | fd = mkstemp(filename); | |
2758 | if (fd < 0) { | |
2759 | perror("unable to create backing store for hugepages"); | |
2760 | free(filename); | |
2761 | return NULL; | |
2762 | } | |
2763 | unlink(filename); | |
2764 | free(filename); | |
2765 | ||
2766 | memory = (memory+hpagesize-1) & ~(hpagesize-1); | |
2767 | ||
2768 | /* | |
2769 | * ftruncate is not supported by hugetlbfs in older | |
2770 | * hosts, so don't bother bailing out on errors. | |
2771 | * If anything goes wrong with it under other filesystems, | |
2772 | * mmap will fail. | |
2773 | */ | |
2774 | if (ftruncate(fd, memory)) | |
2775 | perror("ftruncate"); | |
2776 | ||
2777 | #ifdef MAP_POPULATE | |
2778 | /* NB: MAP_POPULATE won't exhaustively alloc all phys pages in the case | |
2779 | * MAP_PRIVATE is requested. For mem_prealloc we mmap as MAP_SHARED | |
2780 | * to sidestep this quirk. | |
2781 | */ | |
2782 | flags = mem_prealloc ? MAP_POPULATE | MAP_SHARED : MAP_PRIVATE; | |
2783 | area = mmap(0, memory, PROT_READ | PROT_WRITE, flags, fd, 0); | |
2784 | #else | |
2785 | area = mmap(0, memory, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); | |
2786 | #endif | |
2787 | if (area == MAP_FAILED) { | |
2788 | perror("file_ram_alloc: can't mmap RAM pages"); | |
2789 | close(fd); | |
2790 | return (NULL); | |
2791 | } | |
2792 | block->fd = fd; | |
2793 | return area; | |
2794 | } | |
2795 | #endif | |
2796 | ||
2797 | static ram_addr_t find_ram_offset(ram_addr_t size) | |
2798 | { | |
2799 | RAMBlock *block, *next_block; | |
2800 | ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX; | |
2801 | ||
2802 | if (QLIST_EMPTY(&ram_list.blocks)) | |
2803 | return 0; | |
2804 | ||
2805 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
2806 | ram_addr_t end, next = RAM_ADDR_MAX; | |
2807 | ||
2808 | end = block->offset + block->length; | |
2809 | ||
2810 | QLIST_FOREACH(next_block, &ram_list.blocks, next) { | |
2811 | if (next_block->offset >= end) { | |
2812 | next = MIN(next, next_block->offset); | |
2813 | } | |
2814 | } | |
2815 | if (next - end >= size && next - end < mingap) { | |
2816 | offset = end; | |
2817 | mingap = next - end; | |
2818 | } | |
2819 | } | |
2820 | ||
2821 | if (offset == RAM_ADDR_MAX) { | |
2822 | fprintf(stderr, "Failed to find gap of requested size: %" PRIu64 "\n", | |
2823 | (uint64_t)size); | |
2824 | abort(); | |
2825 | } | |
2826 | ||
2827 | return offset; | |
2828 | } | |
2829 | ||
2830 | static ram_addr_t last_ram_offset(void) | |
2831 | { | |
2832 | RAMBlock *block; | |
2833 | ram_addr_t last = 0; | |
2834 | ||
2835 | QLIST_FOREACH(block, &ram_list.blocks, next) | |
2836 | last = MAX(last, block->offset + block->length); | |
2837 | ||
2838 | return last; | |
2839 | } | |
2840 | ||
2841 | void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev) | |
2842 | { | |
2843 | RAMBlock *new_block, *block; | |
2844 | ||
2845 | new_block = NULL; | |
2846 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
2847 | if (block->offset == addr) { | |
2848 | new_block = block; | |
2849 | break; | |
2850 | } | |
2851 | } | |
2852 | assert(new_block); | |
2853 | assert(!new_block->idstr[0]); | |
2854 | ||
2855 | if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) { | |
2856 | char *id = dev->parent_bus->info->get_dev_path(dev); | |
2857 | if (id) { | |
2858 | snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id); | |
2859 | g_free(id); | |
2860 | } | |
2861 | } | |
2862 | pstrcat(new_block->idstr, sizeof(new_block->idstr), name); | |
2863 | ||
2864 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
2865 | if (block != new_block && !strcmp(block->idstr, new_block->idstr)) { | |
2866 | fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n", | |
2867 | new_block->idstr); | |
2868 | abort(); | |
2869 | } | |
2870 | } | |
2871 | } | |
2872 | ||
2873 | ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, | |
2874 | MemoryRegion *mr) | |
2875 | { | |
2876 | RAMBlock *new_block; | |
2877 | ||
2878 | size = TARGET_PAGE_ALIGN(size); | |
2879 | new_block = g_malloc0(sizeof(*new_block)); | |
2880 | ||
2881 | new_block->mr = mr; | |
2882 | new_block->offset = find_ram_offset(size); | |
2883 | if (host) { | |
2884 | new_block->host = host; | |
2885 | new_block->flags |= RAM_PREALLOC_MASK; | |
2886 | } else { | |
2887 | if (mem_path) { | |
2888 | #if defined (__linux__) && !defined(TARGET_S390X) | |
2889 | new_block->host = file_ram_alloc(new_block, size, mem_path); | |
2890 | if (!new_block->host) { | |
2891 | new_block->host = qemu_vmalloc(size); | |
2892 | qemu_madvise(new_block->host, size, QEMU_MADV_MERGEABLE); | |
2893 | } | |
2894 | #else | |
2895 | fprintf(stderr, "-mem-path option unsupported\n"); | |
2896 | exit(1); | |
2897 | #endif | |
2898 | } else { | |
2899 | #if defined(TARGET_S390X) && defined(CONFIG_KVM) | |
2900 | /* S390 KVM requires the topmost vma of the RAM to be smaller than | |
2901 | an system defined value, which is at least 256GB. Larger systems | |
2902 | have larger values. We put the guest between the end of data | |
2903 | segment (system break) and this value. We use 32GB as a base to | |
2904 | have enough room for the system break to grow. */ | |
2905 | new_block->host = mmap((void*)0x800000000, size, | |
2906 | PROT_EXEC|PROT_READ|PROT_WRITE, | |
2907 | MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); | |
2908 | if (new_block->host == MAP_FAILED) { | |
2909 | fprintf(stderr, "Allocating RAM failed\n"); | |
2910 | abort(); | |
2911 | } | |
2912 | #else | |
2913 | if (xen_enabled()) { | |
2914 | xen_ram_alloc(new_block->offset, size, mr); | |
2915 | } else { | |
2916 | new_block->host = qemu_vmalloc(size); | |
2917 | } | |
2918 | #endif | |
2919 | qemu_madvise(new_block->host, size, QEMU_MADV_MERGEABLE); | |
2920 | } | |
2921 | } | |
2922 | new_block->length = size; | |
2923 | ||
2924 | QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next); | |
2925 | ||
2926 | ram_list.phys_dirty = g_realloc(ram_list.phys_dirty, | |
2927 | last_ram_offset() >> TARGET_PAGE_BITS); | |
2928 | memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS), | |
2929 | 0xff, size >> TARGET_PAGE_BITS); | |
2930 | ||
2931 | if (kvm_enabled()) | |
2932 | kvm_setup_guest_memory(new_block->host, size); | |
2933 | ||
2934 | return new_block->offset; | |
2935 | } | |
2936 | ||
2937 | ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr) | |
2938 | { | |
2939 | return qemu_ram_alloc_from_ptr(size, NULL, mr); | |
2940 | } | |
2941 | ||
2942 | void qemu_ram_free_from_ptr(ram_addr_t addr) | |
2943 | { | |
2944 | RAMBlock *block; | |
2945 | ||
2946 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
2947 | if (addr == block->offset) { | |
2948 | QLIST_REMOVE(block, next); | |
2949 | g_free(block); | |
2950 | return; | |
2951 | } | |
2952 | } | |
2953 | } | |
2954 | ||
2955 | void qemu_ram_free(ram_addr_t addr) | |
2956 | { | |
2957 | RAMBlock *block; | |
2958 | ||
2959 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
2960 | if (addr == block->offset) { | |
2961 | QLIST_REMOVE(block, next); | |
2962 | if (block->flags & RAM_PREALLOC_MASK) { | |
2963 | ; | |
2964 | } else if (mem_path) { | |
2965 | #if defined (__linux__) && !defined(TARGET_S390X) | |
2966 | if (block->fd) { | |
2967 | munmap(block->host, block->length); | |
2968 | close(block->fd); | |
2969 | } else { | |
2970 | qemu_vfree(block->host); | |
2971 | } | |
2972 | #else | |
2973 | abort(); | |
2974 | #endif | |
2975 | } else { | |
2976 | #if defined(TARGET_S390X) && defined(CONFIG_KVM) | |
2977 | munmap(block->host, block->length); | |
2978 | #else | |
2979 | if (xen_enabled()) { | |
2980 | xen_invalidate_map_cache_entry(block->host); | |
2981 | } else { | |
2982 | qemu_vfree(block->host); | |
2983 | } | |
2984 | #endif | |
2985 | } | |
2986 | g_free(block); | |
2987 | return; | |
2988 | } | |
2989 | } | |
2990 | ||
2991 | } | |
2992 | ||
2993 | #ifndef _WIN32 | |
2994 | void qemu_ram_remap(ram_addr_t addr, ram_addr_t length) | |
2995 | { | |
2996 | RAMBlock *block; | |
2997 | ram_addr_t offset; | |
2998 | int flags; | |
2999 | void *area, *vaddr; | |
3000 | ||
3001 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
3002 | offset = addr - block->offset; | |
3003 | if (offset < block->length) { | |
3004 | vaddr = block->host + offset; | |
3005 | if (block->flags & RAM_PREALLOC_MASK) { | |
3006 | ; | |
3007 | } else { | |
3008 | flags = MAP_FIXED; | |
3009 | munmap(vaddr, length); | |
3010 | if (mem_path) { | |
3011 | #if defined(__linux__) && !defined(TARGET_S390X) | |
3012 | if (block->fd) { | |
3013 | #ifdef MAP_POPULATE | |
3014 | flags |= mem_prealloc ? MAP_POPULATE | MAP_SHARED : | |
3015 | MAP_PRIVATE; | |
3016 | #else | |
3017 | flags |= MAP_PRIVATE; | |
3018 | #endif | |
3019 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, | |
3020 | flags, block->fd, offset); | |
3021 | } else { | |
3022 | flags |= MAP_PRIVATE | MAP_ANONYMOUS; | |
3023 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, | |
3024 | flags, -1, 0); | |
3025 | } | |
3026 | #else | |
3027 | abort(); | |
3028 | #endif | |
3029 | } else { | |
3030 | #if defined(TARGET_S390X) && defined(CONFIG_KVM) | |
3031 | flags |= MAP_SHARED | MAP_ANONYMOUS; | |
3032 | area = mmap(vaddr, length, PROT_EXEC|PROT_READ|PROT_WRITE, | |
3033 | flags, -1, 0); | |
3034 | #else | |
3035 | flags |= MAP_PRIVATE | MAP_ANONYMOUS; | |
3036 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, | |
3037 | flags, -1, 0); | |
3038 | #endif | |
3039 | } | |
3040 | if (area != vaddr) { | |
3041 | fprintf(stderr, "Could not remap addr: " | |
3042 | RAM_ADDR_FMT "@" RAM_ADDR_FMT "\n", | |
3043 | length, addr); | |
3044 | exit(1); | |
3045 | } | |
3046 | qemu_madvise(vaddr, length, QEMU_MADV_MERGEABLE); | |
3047 | } | |
3048 | return; | |
3049 | } | |
3050 | } | |
3051 | } | |
3052 | #endif /* !_WIN32 */ | |
3053 | ||
3054 | /* Return a host pointer to ram allocated with qemu_ram_alloc. | |
3055 | With the exception of the softmmu code in this file, this should | |
3056 | only be used for local memory (e.g. video ram) that the device owns, | |
3057 | and knows it isn't going to access beyond the end of the block. | |
3058 | ||
3059 | It should not be used for general purpose DMA. | |
3060 | Use cpu_physical_memory_map/cpu_physical_memory_rw instead. | |
3061 | */ | |
3062 | void *qemu_get_ram_ptr(ram_addr_t addr) | |
3063 | { | |
3064 | RAMBlock *block; | |
3065 | ||
3066 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
3067 | if (addr - block->offset < block->length) { | |
3068 | /* Move this entry to to start of the list. */ | |
3069 | if (block != QLIST_FIRST(&ram_list.blocks)) { | |
3070 | QLIST_REMOVE(block, next); | |
3071 | QLIST_INSERT_HEAD(&ram_list.blocks, block, next); | |
3072 | } | |
3073 | if (xen_enabled()) { | |
3074 | /* We need to check if the requested address is in the RAM | |
3075 | * because we don't want to map the entire memory in QEMU. | |
3076 | * In that case just map until the end of the page. | |
3077 | */ | |
3078 | if (block->offset == 0) { | |
3079 | return xen_map_cache(addr, 0, 0); | |
3080 | } else if (block->host == NULL) { | |
3081 | block->host = | |
3082 | xen_map_cache(block->offset, block->length, 1); | |
3083 | } | |
3084 | } | |
3085 | return block->host + (addr - block->offset); | |
3086 | } | |
3087 | } | |
3088 | ||
3089 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); | |
3090 | abort(); | |
3091 | ||
3092 | return NULL; | |
3093 | } | |
3094 | ||
3095 | /* Return a host pointer to ram allocated with qemu_ram_alloc. | |
3096 | * Same as qemu_get_ram_ptr but avoid reordering ramblocks. | |
3097 | */ | |
3098 | void *qemu_safe_ram_ptr(ram_addr_t addr) | |
3099 | { | |
3100 | RAMBlock *block; | |
3101 | ||
3102 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
3103 | if (addr - block->offset < block->length) { | |
3104 | if (xen_enabled()) { | |
3105 | /* We need to check if the requested address is in the RAM | |
3106 | * because we don't want to map the entire memory in QEMU. | |
3107 | * In that case just map until the end of the page. | |
3108 | */ | |
3109 | if (block->offset == 0) { | |
3110 | return xen_map_cache(addr, 0, 0); | |
3111 | } else if (block->host == NULL) { | |
3112 | block->host = | |
3113 | xen_map_cache(block->offset, block->length, 1); | |
3114 | } | |
3115 | } | |
3116 | return block->host + (addr - block->offset); | |
3117 | } | |
3118 | } | |
3119 | ||
3120 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); | |
3121 | abort(); | |
3122 | ||
3123 | return NULL; | |
3124 | } | |
3125 | ||
3126 | /* Return a host pointer to guest's ram. Similar to qemu_get_ram_ptr | |
3127 | * but takes a size argument */ | |
3128 | void *qemu_ram_ptr_length(ram_addr_t addr, ram_addr_t *size) | |
3129 | { | |
3130 | if (*size == 0) { | |
3131 | return NULL; | |
3132 | } | |
3133 | if (xen_enabled()) { | |
3134 | return xen_map_cache(addr, *size, 1); | |
3135 | } else { | |
3136 | RAMBlock *block; | |
3137 | ||
3138 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
3139 | if (addr - block->offset < block->length) { | |
3140 | if (addr - block->offset + *size > block->length) | |
3141 | *size = block->length - addr + block->offset; | |
3142 | return block->host + (addr - block->offset); | |
3143 | } | |
3144 | } | |
3145 | ||
3146 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); | |
3147 | abort(); | |
3148 | } | |
3149 | } | |
3150 | ||
3151 | void qemu_put_ram_ptr(void *addr) | |
3152 | { | |
3153 | trace_qemu_put_ram_ptr(addr); | |
3154 | } | |
3155 | ||
3156 | int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) | |
3157 | { | |
3158 | RAMBlock *block; | |
3159 | uint8_t *host = ptr; | |
3160 | ||
3161 | if (xen_enabled()) { | |
3162 | *ram_addr = xen_ram_addr_from_mapcache(ptr); | |
3163 | return 0; | |
3164 | } | |
3165 | ||
3166 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
3167 | /* This case append when the block is not mapped. */ | |
3168 | if (block->host == NULL) { | |
3169 | continue; | |
3170 | } | |
3171 | if (host - block->host < block->length) { | |
3172 | *ram_addr = block->offset + (host - block->host); | |
3173 | return 0; | |
3174 | } | |
3175 | } | |
3176 | ||
3177 | return -1; | |
3178 | } | |
3179 | ||
3180 | /* Some of the softmmu routines need to translate from a host pointer | |
3181 | (typically a TLB entry) back to a ram offset. */ | |
3182 | ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr) | |
3183 | { | |
3184 | ram_addr_t ram_addr; | |
3185 | ||
3186 | if (qemu_ram_addr_from_host(ptr, &ram_addr)) { | |
3187 | fprintf(stderr, "Bad ram pointer %p\n", ptr); | |
3188 | abort(); | |
3189 | } | |
3190 | return ram_addr; | |
3191 | } | |
3192 | ||
3193 | static uint64_t unassigned_mem_read(void *opaque, target_phys_addr_t addr, | |
3194 | unsigned size) | |
3195 | { | |
3196 | #ifdef DEBUG_UNASSIGNED | |
3197 | printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); | |
3198 | #endif | |
3199 | #if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE) | |
3200 | cpu_unassigned_access(cpu_single_env, addr, 0, 0, 0, size); | |
3201 | #endif | |
3202 | return 0; | |
3203 | } | |
3204 | ||
3205 | static void unassigned_mem_write(void *opaque, target_phys_addr_t addr, | |
3206 | uint64_t val, unsigned size) | |
3207 | { | |
3208 | #ifdef DEBUG_UNASSIGNED | |
3209 | printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val); | |
3210 | #endif | |
3211 | #if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE) | |
3212 | cpu_unassigned_access(cpu_single_env, addr, 1, 0, 0, size); | |
3213 | #endif | |
3214 | } | |
3215 | ||
3216 | static const MemoryRegionOps unassigned_mem_ops = { | |
3217 | .read = unassigned_mem_read, | |
3218 | .write = unassigned_mem_write, | |
3219 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3220 | }; | |
3221 | ||
3222 | static uint64_t error_mem_read(void *opaque, target_phys_addr_t addr, | |
3223 | unsigned size) | |
3224 | { | |
3225 | abort(); | |
3226 | } | |
3227 | ||
3228 | static void error_mem_write(void *opaque, target_phys_addr_t addr, | |
3229 | uint64_t value, unsigned size) | |
3230 | { | |
3231 | abort(); | |
3232 | } | |
3233 | ||
3234 | static const MemoryRegionOps error_mem_ops = { | |
3235 | .read = error_mem_read, | |
3236 | .write = error_mem_write, | |
3237 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3238 | }; | |
3239 | ||
3240 | static const MemoryRegionOps rom_mem_ops = { | |
3241 | .read = error_mem_read, | |
3242 | .write = unassigned_mem_write, | |
3243 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3244 | }; | |
3245 | ||
3246 | static void notdirty_mem_write(void *opaque, target_phys_addr_t ram_addr, | |
3247 | uint64_t val, unsigned size) | |
3248 | { | |
3249 | int dirty_flags; | |
3250 | dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr); | |
3251 | if (!(dirty_flags & CODE_DIRTY_FLAG)) { | |
3252 | #if !defined(CONFIG_USER_ONLY) | |
3253 | tb_invalidate_phys_page_fast(ram_addr, size); | |
3254 | dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr); | |
3255 | #endif | |
3256 | } | |
3257 | switch (size) { | |
3258 | case 1: | |
3259 | stb_p(qemu_get_ram_ptr(ram_addr), val); | |
3260 | break; | |
3261 | case 2: | |
3262 | stw_p(qemu_get_ram_ptr(ram_addr), val); | |
3263 | break; | |
3264 | case 4: | |
3265 | stl_p(qemu_get_ram_ptr(ram_addr), val); | |
3266 | break; | |
3267 | default: | |
3268 | abort(); | |
3269 | } | |
3270 | dirty_flags |= (0xff & ~CODE_DIRTY_FLAG); | |
3271 | cpu_physical_memory_set_dirty_flags(ram_addr, dirty_flags); | |
3272 | /* we remove the notdirty callback only if the code has been | |
3273 | flushed */ | |
3274 | if (dirty_flags == 0xff) | |
3275 | tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); | |
3276 | } | |
3277 | ||
3278 | static const MemoryRegionOps notdirty_mem_ops = { | |
3279 | .read = error_mem_read, | |
3280 | .write = notdirty_mem_write, | |
3281 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3282 | }; | |
3283 | ||
3284 | /* Generate a debug exception if a watchpoint has been hit. */ | |
3285 | static void check_watchpoint(int offset, int len_mask, int flags) | |
3286 | { | |
3287 | CPUState *env = cpu_single_env; | |
3288 | target_ulong pc, cs_base; | |
3289 | TranslationBlock *tb; | |
3290 | target_ulong vaddr; | |
3291 | CPUWatchpoint *wp; | |
3292 | int cpu_flags; | |
3293 | ||
3294 | if (env->watchpoint_hit) { | |
3295 | /* We re-entered the check after replacing the TB. Now raise | |
3296 | * the debug interrupt so that is will trigger after the | |
3297 | * current instruction. */ | |
3298 | cpu_interrupt(env, CPU_INTERRUPT_DEBUG); | |
3299 | return; | |
3300 | } | |
3301 | vaddr = (env->mem_io_vaddr & TARGET_PAGE_MASK) + offset; | |
3302 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
3303 | if ((vaddr == (wp->vaddr & len_mask) || | |
3304 | (vaddr & wp->len_mask) == wp->vaddr) && (wp->flags & flags)) { | |
3305 | wp->flags |= BP_WATCHPOINT_HIT; | |
3306 | if (!env->watchpoint_hit) { | |
3307 | env->watchpoint_hit = wp; | |
3308 | tb = tb_find_pc(env->mem_io_pc); | |
3309 | if (!tb) { | |
3310 | cpu_abort(env, "check_watchpoint: could not find TB for " | |
3311 | "pc=%p", (void *)env->mem_io_pc); | |
3312 | } | |
3313 | cpu_restore_state(tb, env, env->mem_io_pc); | |
3314 | tb_phys_invalidate(tb, -1); | |
3315 | if (wp->flags & BP_STOP_BEFORE_ACCESS) { | |
3316 | env->exception_index = EXCP_DEBUG; | |
3317 | } else { | |
3318 | cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags); | |
3319 | tb_gen_code(env, pc, cs_base, cpu_flags, 1); | |
3320 | } | |
3321 | cpu_resume_from_signal(env, NULL); | |
3322 | } | |
3323 | } else { | |
3324 | wp->flags &= ~BP_WATCHPOINT_HIT; | |
3325 | } | |
3326 | } | |
3327 | } | |
3328 | ||
3329 | /* Watchpoint access routines. Watchpoints are inserted using TLB tricks, | |
3330 | so these check for a hit then pass through to the normal out-of-line | |
3331 | phys routines. */ | |
3332 | static uint64_t watch_mem_read(void *opaque, target_phys_addr_t addr, | |
3333 | unsigned size) | |
3334 | { | |
3335 | check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_READ); | |
3336 | switch (size) { | |
3337 | case 1: return ldub_phys(addr); | |
3338 | case 2: return lduw_phys(addr); | |
3339 | case 4: return ldl_phys(addr); | |
3340 | default: abort(); | |
3341 | } | |
3342 | } | |
3343 | ||
3344 | static void watch_mem_write(void *opaque, target_phys_addr_t addr, | |
3345 | uint64_t val, unsigned size) | |
3346 | { | |
3347 | check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_WRITE); | |
3348 | switch (size) { | |
3349 | case 1: stb_phys(addr, val); | |
3350 | case 2: stw_phys(addr, val); | |
3351 | case 4: stl_phys(addr, val); | |
3352 | default: abort(); | |
3353 | } | |
3354 | } | |
3355 | ||
3356 | static const MemoryRegionOps watch_mem_ops = { | |
3357 | .read = watch_mem_read, | |
3358 | .write = watch_mem_write, | |
3359 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3360 | }; | |
3361 | ||
3362 | static uint64_t subpage_read(void *opaque, target_phys_addr_t addr, | |
3363 | unsigned len) | |
3364 | { | |
3365 | subpage_t *mmio = opaque; | |
3366 | unsigned int idx = SUBPAGE_IDX(addr); | |
3367 | MemoryRegionSection *section; | |
3368 | #if defined(DEBUG_SUBPAGE) | |
3369 | printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__, | |
3370 | mmio, len, addr, idx); | |
3371 | #endif | |
3372 | ||
3373 | section = &phys_sections[mmio->sub_section[idx]]; | |
3374 | addr += mmio->base; | |
3375 | addr -= section->offset_within_address_space; | |
3376 | addr += section->offset_within_region; | |
3377 | return io_mem_read(section->mr->ram_addr, addr, len); | |
3378 | } | |
3379 | ||
3380 | static void subpage_write(void *opaque, target_phys_addr_t addr, | |
3381 | uint64_t value, unsigned len) | |
3382 | { | |
3383 | subpage_t *mmio = opaque; | |
3384 | unsigned int idx = SUBPAGE_IDX(addr); | |
3385 | MemoryRegionSection *section; | |
3386 | #if defined(DEBUG_SUBPAGE) | |
3387 | printf("%s: subpage %p len %d addr " TARGET_FMT_plx | |
3388 | " idx %d value %"PRIx64"\n", | |
3389 | __func__, mmio, len, addr, idx, value); | |
3390 | #endif | |
3391 | ||
3392 | section = &phys_sections[mmio->sub_section[idx]]; | |
3393 | addr += mmio->base; | |
3394 | addr -= section->offset_within_address_space; | |
3395 | addr += section->offset_within_region; | |
3396 | io_mem_write(section->mr->ram_addr, addr, value, len); | |
3397 | } | |
3398 | ||
3399 | static const MemoryRegionOps subpage_ops = { | |
3400 | .read = subpage_read, | |
3401 | .write = subpage_write, | |
3402 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3403 | }; | |
3404 | ||
3405 | static uint64_t subpage_ram_read(void *opaque, target_phys_addr_t addr, | |
3406 | unsigned size) | |
3407 | { | |
3408 | ram_addr_t raddr = addr; | |
3409 | void *ptr = qemu_get_ram_ptr(raddr); | |
3410 | switch (size) { | |
3411 | case 1: return ldub_p(ptr); | |
3412 | case 2: return lduw_p(ptr); | |
3413 | case 4: return ldl_p(ptr); | |
3414 | default: abort(); | |
3415 | } | |
3416 | } | |
3417 | ||
3418 | static void subpage_ram_write(void *opaque, target_phys_addr_t addr, | |
3419 | uint64_t value, unsigned size) | |
3420 | { | |
3421 | ram_addr_t raddr = addr; | |
3422 | void *ptr = qemu_get_ram_ptr(raddr); | |
3423 | switch (size) { | |
3424 | case 1: return stb_p(ptr, value); | |
3425 | case 2: return stw_p(ptr, value); | |
3426 | case 4: return stl_p(ptr, value); | |
3427 | default: abort(); | |
3428 | } | |
3429 | } | |
3430 | ||
3431 | static const MemoryRegionOps subpage_ram_ops = { | |
3432 | .read = subpage_ram_read, | |
3433 | .write = subpage_ram_write, | |
3434 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3435 | }; | |
3436 | ||
3437 | static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, | |
3438 | uint16_t section) | |
3439 | { | |
3440 | int idx, eidx; | |
3441 | ||
3442 | if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE) | |
3443 | return -1; | |
3444 | idx = SUBPAGE_IDX(start); | |
3445 | eidx = SUBPAGE_IDX(end); | |
3446 | #if defined(DEBUG_SUBPAGE) | |
3447 | printf("%s: %p start %08x end %08x idx %08x eidx %08x mem %ld\n", __func__, | |
3448 | mmio, start, end, idx, eidx, memory); | |
3449 | #endif | |
3450 | if (memory_region_is_ram(phys_sections[section].mr)) { | |
3451 | MemoryRegionSection new_section = phys_sections[section]; | |
3452 | new_section.mr = &io_mem_subpage_ram; | |
3453 | section = phys_section_add(&new_section); | |
3454 | } | |
3455 | for (; idx <= eidx; idx++) { | |
3456 | mmio->sub_section[idx] = section; | |
3457 | } | |
3458 | ||
3459 | return 0; | |
3460 | } | |
3461 | ||
3462 | static subpage_t *subpage_init(target_phys_addr_t base) | |
3463 | { | |
3464 | subpage_t *mmio; | |
3465 | ||
3466 | mmio = g_malloc0(sizeof(subpage_t)); | |
3467 | ||
3468 | mmio->base = base; | |
3469 | memory_region_init_io(&mmio->iomem, &subpage_ops, mmio, | |
3470 | "subpage", TARGET_PAGE_SIZE); | |
3471 | mmio->iomem.subpage = true; | |
3472 | #if defined(DEBUG_SUBPAGE) | |
3473 | printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__, | |
3474 | mmio, base, TARGET_PAGE_SIZE, subpage_memory); | |
3475 | #endif | |
3476 | subpage_register(mmio, 0, TARGET_PAGE_SIZE-1, phys_section_unassigned); | |
3477 | ||
3478 | return mmio; | |
3479 | } | |
3480 | ||
3481 | static int get_free_io_mem_idx(void) | |
3482 | { | |
3483 | int i; | |
3484 | ||
3485 | for (i = 0; i<IO_MEM_NB_ENTRIES; i++) | |
3486 | if (!io_mem_used[i]) { | |
3487 | io_mem_used[i] = 1; | |
3488 | return i; | |
3489 | } | |
3490 | fprintf(stderr, "RAN out out io_mem_idx, max %d !\n", IO_MEM_NB_ENTRIES); | |
3491 | return -1; | |
3492 | } | |
3493 | ||
3494 | /* mem_read and mem_write are arrays of functions containing the | |
3495 | function to access byte (index 0), word (index 1) and dword (index | |
3496 | 2). Functions can be omitted with a NULL function pointer. | |
3497 | If io_index is non zero, the corresponding io zone is | |
3498 | modified. If it is zero, a new io zone is allocated. The return | |
3499 | value can be used with cpu_register_physical_memory(). (-1) is | |
3500 | returned if error. */ | |
3501 | static int cpu_register_io_memory_fixed(int io_index, MemoryRegion *mr) | |
3502 | { | |
3503 | if (io_index <= 0) { | |
3504 | io_index = get_free_io_mem_idx(); | |
3505 | if (io_index == -1) | |
3506 | return io_index; | |
3507 | } else { | |
3508 | if (io_index >= IO_MEM_NB_ENTRIES) | |
3509 | return -1; | |
3510 | } | |
3511 | ||
3512 | io_mem_region[io_index] = mr; | |
3513 | ||
3514 | return io_index; | |
3515 | } | |
3516 | ||
3517 | int cpu_register_io_memory(MemoryRegion *mr) | |
3518 | { | |
3519 | return cpu_register_io_memory_fixed(0, mr); | |
3520 | } | |
3521 | ||
3522 | void cpu_unregister_io_memory(int io_index) | |
3523 | { | |
3524 | io_mem_region[io_index] = NULL; | |
3525 | io_mem_used[io_index] = 0; | |
3526 | } | |
3527 | ||
3528 | static uint16_t dummy_section(MemoryRegion *mr) | |
3529 | { | |
3530 | MemoryRegionSection section = { | |
3531 | .mr = mr, | |
3532 | .offset_within_address_space = 0, | |
3533 | .offset_within_region = 0, | |
3534 | .size = UINT64_MAX, | |
3535 | }; | |
3536 | ||
3537 | return phys_section_add(§ion); | |
3538 | } | |
3539 | ||
3540 | static void io_mem_init(void) | |
3541 | { | |
3542 | int i; | |
3543 | ||
3544 | /* Must be first: */ | |
3545 | memory_region_init_io(&io_mem_ram, &error_mem_ops, NULL, "ram", UINT64_MAX); | |
3546 | assert(io_mem_ram.ram_addr == 0); | |
3547 | memory_region_init_io(&io_mem_rom, &rom_mem_ops, NULL, "rom", UINT64_MAX); | |
3548 | memory_region_init_io(&io_mem_unassigned, &unassigned_mem_ops, NULL, | |
3549 | "unassigned", UINT64_MAX); | |
3550 | memory_region_init_io(&io_mem_notdirty, ¬dirty_mem_ops, NULL, | |
3551 | "notdirty", UINT64_MAX); | |
3552 | memory_region_init_io(&io_mem_subpage_ram, &subpage_ram_ops, NULL, | |
3553 | "subpage-ram", UINT64_MAX); | |
3554 | for (i=0; i<5; i++) | |
3555 | io_mem_used[i] = 1; | |
3556 | ||
3557 | memory_region_init_io(&io_mem_watch, &watch_mem_ops, NULL, | |
3558 | "watch", UINT64_MAX); | |
3559 | } | |
3560 | ||
3561 | static void core_begin(MemoryListener *listener) | |
3562 | { | |
3563 | destroy_all_mappings(); | |
3564 | phys_sections_clear(); | |
3565 | phys_map.u.node = PHYS_MAP_NODE_NIL; | |
3566 | phys_section_unassigned = dummy_section(&io_mem_unassigned); | |
3567 | } | |
3568 | ||
3569 | static void core_commit(MemoryListener *listener) | |
3570 | { | |
3571 | CPUState *env; | |
3572 | ||
3573 | /* since each CPU stores ram addresses in its TLB cache, we must | |
3574 | reset the modified entries */ | |
3575 | /* XXX: slow ! */ | |
3576 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
3577 | tlb_flush(env, 1); | |
3578 | } | |
3579 | } | |
3580 | ||
3581 | static void core_region_add(MemoryListener *listener, | |
3582 | MemoryRegionSection *section) | |
3583 | { | |
3584 | cpu_register_physical_memory_log(section, section->readonly); | |
3585 | } | |
3586 | ||
3587 | static void core_region_del(MemoryListener *listener, | |
3588 | MemoryRegionSection *section) | |
3589 | { | |
3590 | } | |
3591 | ||
3592 | static void core_region_nop(MemoryListener *listener, | |
3593 | MemoryRegionSection *section) | |
3594 | { | |
3595 | cpu_register_physical_memory_log(section, section->readonly); | |
3596 | } | |
3597 | ||
3598 | static void core_log_start(MemoryListener *listener, | |
3599 | MemoryRegionSection *section) | |
3600 | { | |
3601 | } | |
3602 | ||
3603 | static void core_log_stop(MemoryListener *listener, | |
3604 | MemoryRegionSection *section) | |
3605 | { | |
3606 | } | |
3607 | ||
3608 | static void core_log_sync(MemoryListener *listener, | |
3609 | MemoryRegionSection *section) | |
3610 | { | |
3611 | } | |
3612 | ||
3613 | static void core_log_global_start(MemoryListener *listener) | |
3614 | { | |
3615 | cpu_physical_memory_set_dirty_tracking(1); | |
3616 | } | |
3617 | ||
3618 | static void core_log_global_stop(MemoryListener *listener) | |
3619 | { | |
3620 | cpu_physical_memory_set_dirty_tracking(0); | |
3621 | } | |
3622 | ||
3623 | static void core_eventfd_add(MemoryListener *listener, | |
3624 | MemoryRegionSection *section, | |
3625 | bool match_data, uint64_t data, int fd) | |
3626 | { | |
3627 | } | |
3628 | ||
3629 | static void core_eventfd_del(MemoryListener *listener, | |
3630 | MemoryRegionSection *section, | |
3631 | bool match_data, uint64_t data, int fd) | |
3632 | { | |
3633 | } | |
3634 | ||
3635 | static void io_begin(MemoryListener *listener) | |
3636 | { | |
3637 | } | |
3638 | ||
3639 | static void io_commit(MemoryListener *listener) | |
3640 | { | |
3641 | } | |
3642 | ||
3643 | static void io_region_add(MemoryListener *listener, | |
3644 | MemoryRegionSection *section) | |
3645 | { | |
3646 | iorange_init(§ion->mr->iorange, &memory_region_iorange_ops, | |
3647 | section->offset_within_address_space, section->size); | |
3648 | ioport_register(§ion->mr->iorange); | |
3649 | } | |
3650 | ||
3651 | static void io_region_del(MemoryListener *listener, | |
3652 | MemoryRegionSection *section) | |
3653 | { | |
3654 | isa_unassign_ioport(section->offset_within_address_space, section->size); | |
3655 | } | |
3656 | ||
3657 | static void io_region_nop(MemoryListener *listener, | |
3658 | MemoryRegionSection *section) | |
3659 | { | |
3660 | } | |
3661 | ||
3662 | static void io_log_start(MemoryListener *listener, | |
3663 | MemoryRegionSection *section) | |
3664 | { | |
3665 | } | |
3666 | ||
3667 | static void io_log_stop(MemoryListener *listener, | |
3668 | MemoryRegionSection *section) | |
3669 | { | |
3670 | } | |
3671 | ||
3672 | static void io_log_sync(MemoryListener *listener, | |
3673 | MemoryRegionSection *section) | |
3674 | { | |
3675 | } | |
3676 | ||
3677 | static void io_log_global_start(MemoryListener *listener) | |
3678 | { | |
3679 | } | |
3680 | ||
3681 | static void io_log_global_stop(MemoryListener *listener) | |
3682 | { | |
3683 | } | |
3684 | ||
3685 | static void io_eventfd_add(MemoryListener *listener, | |
3686 | MemoryRegionSection *section, | |
3687 | bool match_data, uint64_t data, int fd) | |
3688 | { | |
3689 | } | |
3690 | ||
3691 | static void io_eventfd_del(MemoryListener *listener, | |
3692 | MemoryRegionSection *section, | |
3693 | bool match_data, uint64_t data, int fd) | |
3694 | { | |
3695 | } | |
3696 | ||
3697 | static MemoryListener core_memory_listener = { | |
3698 | .begin = core_begin, | |
3699 | .commit = core_commit, | |
3700 | .region_add = core_region_add, | |
3701 | .region_del = core_region_del, | |
3702 | .region_nop = core_region_nop, | |
3703 | .log_start = core_log_start, | |
3704 | .log_stop = core_log_stop, | |
3705 | .log_sync = core_log_sync, | |
3706 | .log_global_start = core_log_global_start, | |
3707 | .log_global_stop = core_log_global_stop, | |
3708 | .eventfd_add = core_eventfd_add, | |
3709 | .eventfd_del = core_eventfd_del, | |
3710 | .priority = 0, | |
3711 | }; | |
3712 | ||
3713 | static MemoryListener io_memory_listener = { | |
3714 | .begin = io_begin, | |
3715 | .commit = io_commit, | |
3716 | .region_add = io_region_add, | |
3717 | .region_del = io_region_del, | |
3718 | .region_nop = io_region_nop, | |
3719 | .log_start = io_log_start, | |
3720 | .log_stop = io_log_stop, | |
3721 | .log_sync = io_log_sync, | |
3722 | .log_global_start = io_log_global_start, | |
3723 | .log_global_stop = io_log_global_stop, | |
3724 | .eventfd_add = io_eventfd_add, | |
3725 | .eventfd_del = io_eventfd_del, | |
3726 | .priority = 0, | |
3727 | }; | |
3728 | ||
3729 | static void memory_map_init(void) | |
3730 | { | |
3731 | system_memory = g_malloc(sizeof(*system_memory)); | |
3732 | memory_region_init(system_memory, "system", INT64_MAX); | |
3733 | set_system_memory_map(system_memory); | |
3734 | ||
3735 | system_io = g_malloc(sizeof(*system_io)); | |
3736 | memory_region_init(system_io, "io", 65536); | |
3737 | set_system_io_map(system_io); | |
3738 | ||
3739 | memory_listener_register(&core_memory_listener, system_memory); | |
3740 | memory_listener_register(&io_memory_listener, system_io); | |
3741 | } | |
3742 | ||
3743 | MemoryRegion *get_system_memory(void) | |
3744 | { | |
3745 | return system_memory; | |
3746 | } | |
3747 | ||
3748 | MemoryRegion *get_system_io(void) | |
3749 | { | |
3750 | return system_io; | |
3751 | } | |
3752 | ||
3753 | #endif /* !defined(CONFIG_USER_ONLY) */ | |
3754 | ||
3755 | /* physical memory access (slow version, mainly for debug) */ | |
3756 | #if defined(CONFIG_USER_ONLY) | |
3757 | int cpu_memory_rw_debug(CPUState *env, target_ulong addr, | |
3758 | uint8_t *buf, int len, int is_write) | |
3759 | { | |
3760 | int l, flags; | |
3761 | target_ulong page; | |
3762 | void * p; | |
3763 | ||
3764 | while (len > 0) { | |
3765 | page = addr & TARGET_PAGE_MASK; | |
3766 | l = (page + TARGET_PAGE_SIZE) - addr; | |
3767 | if (l > len) | |
3768 | l = len; | |
3769 | flags = page_get_flags(page); | |
3770 | if (!(flags & PAGE_VALID)) | |
3771 | return -1; | |
3772 | if (is_write) { | |
3773 | if (!(flags & PAGE_WRITE)) | |
3774 | return -1; | |
3775 | /* XXX: this code should not depend on lock_user */ | |
3776 | if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) | |
3777 | return -1; | |
3778 | memcpy(p, buf, l); | |
3779 | unlock_user(p, addr, l); | |
3780 | } else { | |
3781 | if (!(flags & PAGE_READ)) | |
3782 | return -1; | |
3783 | /* XXX: this code should not depend on lock_user */ | |
3784 | if (!(p = lock_user(VERIFY_READ, addr, l, 1))) | |
3785 | return -1; | |
3786 | memcpy(buf, p, l); | |
3787 | unlock_user(p, addr, 0); | |
3788 | } | |
3789 | len -= l; | |
3790 | buf += l; | |
3791 | addr += l; | |
3792 | } | |
3793 | return 0; | |
3794 | } | |
3795 | ||
3796 | #else | |
3797 | void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf, | |
3798 | int len, int is_write) | |
3799 | { | |
3800 | int l, io_index; | |
3801 | uint8_t *ptr; | |
3802 | uint32_t val; | |
3803 | target_phys_addr_t page; | |
3804 | MemoryRegionSection section; | |
3805 | ||
3806 | while (len > 0) { | |
3807 | page = addr & TARGET_PAGE_MASK; | |
3808 | l = (page + TARGET_PAGE_SIZE) - addr; | |
3809 | if (l > len) | |
3810 | l = len; | |
3811 | section = phys_page_find(page >> TARGET_PAGE_BITS); | |
3812 | ||
3813 | if (is_write) { | |
3814 | if (!memory_region_is_ram(section.mr)) { | |
3815 | target_phys_addr_t addr1; | |
3816 | io_index = memory_region_get_ram_addr(section.mr) | |
3817 | & (IO_MEM_NB_ENTRIES - 1); | |
3818 | addr1 = (addr & ~TARGET_PAGE_MASK) | |
3819 | + section.offset_within_region; | |
3820 | /* XXX: could force cpu_single_env to NULL to avoid | |
3821 | potential bugs */ | |
3822 | if (l >= 4 && ((addr1 & 3) == 0)) { | |
3823 | /* 32 bit write access */ | |
3824 | val = ldl_p(buf); | |
3825 | io_mem_write(io_index, addr1, val, 4); | |
3826 | l = 4; | |
3827 | } else if (l >= 2 && ((addr1 & 1) == 0)) { | |
3828 | /* 16 bit write access */ | |
3829 | val = lduw_p(buf); | |
3830 | io_mem_write(io_index, addr1, val, 2); | |
3831 | l = 2; | |
3832 | } else { | |
3833 | /* 8 bit write access */ | |
3834 | val = ldub_p(buf); | |
3835 | io_mem_write(io_index, addr1, val, 1); | |
3836 | l = 1; | |
3837 | } | |
3838 | } else if (!section.readonly) { | |
3839 | ram_addr_t addr1; | |
3840 | addr1 = (memory_region_get_ram_addr(section.mr) | |
3841 | + section.offset_within_region) | |
3842 | | (addr & ~TARGET_PAGE_MASK); | |
3843 | /* RAM case */ | |
3844 | ptr = qemu_get_ram_ptr(addr1); | |
3845 | memcpy(ptr, buf, l); | |
3846 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
3847 | /* invalidate code */ | |
3848 | tb_invalidate_phys_page_range(addr1, addr1 + l, 0); | |
3849 | /* set dirty bit */ | |
3850 | cpu_physical_memory_set_dirty_flags( | |
3851 | addr1, (0xff & ~CODE_DIRTY_FLAG)); | |
3852 | } | |
3853 | qemu_put_ram_ptr(ptr); | |
3854 | } | |
3855 | } else { | |
3856 | if (!is_ram_rom_romd(§ion)) { | |
3857 | target_phys_addr_t addr1; | |
3858 | /* I/O case */ | |
3859 | io_index = memory_region_get_ram_addr(section.mr) | |
3860 | & (IO_MEM_NB_ENTRIES - 1); | |
3861 | addr1 = (addr & ~TARGET_PAGE_MASK) | |
3862 | + section.offset_within_region; | |
3863 | if (l >= 4 && ((addr1 & 3) == 0)) { | |
3864 | /* 32 bit read access */ | |
3865 | val = io_mem_read(io_index, addr1, 4); | |
3866 | stl_p(buf, val); | |
3867 | l = 4; | |
3868 | } else if (l >= 2 && ((addr1 & 1) == 0)) { | |
3869 | /* 16 bit read access */ | |
3870 | val = io_mem_read(io_index, addr1, 2); | |
3871 | stw_p(buf, val); | |
3872 | l = 2; | |
3873 | } else { | |
3874 | /* 8 bit read access */ | |
3875 | val = io_mem_read(io_index, addr1, 1); | |
3876 | stb_p(buf, val); | |
3877 | l = 1; | |
3878 | } | |
3879 | } else { | |
3880 | /* RAM case */ | |
3881 | ptr = qemu_get_ram_ptr(section.mr->ram_addr | |
3882 | + section.offset_within_region); | |
3883 | memcpy(buf, ptr + (addr & ~TARGET_PAGE_MASK), l); | |
3884 | qemu_put_ram_ptr(ptr); | |
3885 | } | |
3886 | } | |
3887 | len -= l; | |
3888 | buf += l; | |
3889 | addr += l; | |
3890 | } | |
3891 | } | |
3892 | ||
3893 | /* used for ROM loading : can write in RAM and ROM */ | |
3894 | void cpu_physical_memory_write_rom(target_phys_addr_t addr, | |
3895 | const uint8_t *buf, int len) | |
3896 | { | |
3897 | int l; | |
3898 | uint8_t *ptr; | |
3899 | target_phys_addr_t page; | |
3900 | MemoryRegionSection section; | |
3901 | ||
3902 | while (len > 0) { | |
3903 | page = addr & TARGET_PAGE_MASK; | |
3904 | l = (page + TARGET_PAGE_SIZE) - addr; | |
3905 | if (l > len) | |
3906 | l = len; | |
3907 | section = phys_page_find(page >> TARGET_PAGE_BITS); | |
3908 | ||
3909 | if (!is_ram_rom_romd(§ion)) { | |
3910 | /* do nothing */ | |
3911 | } else { | |
3912 | unsigned long addr1; | |
3913 | addr1 = (memory_region_get_ram_addr(section.mr) | |
3914 | + section.offset_within_region) | |
3915 | + (addr & ~TARGET_PAGE_MASK); | |
3916 | /* ROM/RAM case */ | |
3917 | ptr = qemu_get_ram_ptr(addr1); | |
3918 | memcpy(ptr, buf, l); | |
3919 | qemu_put_ram_ptr(ptr); | |
3920 | } | |
3921 | len -= l; | |
3922 | buf += l; | |
3923 | addr += l; | |
3924 | } | |
3925 | } | |
3926 | ||
3927 | typedef struct { | |
3928 | void *buffer; | |
3929 | target_phys_addr_t addr; | |
3930 | target_phys_addr_t len; | |
3931 | } BounceBuffer; | |
3932 | ||
3933 | static BounceBuffer bounce; | |
3934 | ||
3935 | typedef struct MapClient { | |
3936 | void *opaque; | |
3937 | void (*callback)(void *opaque); | |
3938 | QLIST_ENTRY(MapClient) link; | |
3939 | } MapClient; | |
3940 | ||
3941 | static QLIST_HEAD(map_client_list, MapClient) map_client_list | |
3942 | = QLIST_HEAD_INITIALIZER(map_client_list); | |
3943 | ||
3944 | void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque)) | |
3945 | { | |
3946 | MapClient *client = g_malloc(sizeof(*client)); | |
3947 | ||
3948 | client->opaque = opaque; | |
3949 | client->callback = callback; | |
3950 | QLIST_INSERT_HEAD(&map_client_list, client, link); | |
3951 | return client; | |
3952 | } | |
3953 | ||
3954 | void cpu_unregister_map_client(void *_client) | |
3955 | { | |
3956 | MapClient *client = (MapClient *)_client; | |
3957 | ||
3958 | QLIST_REMOVE(client, link); | |
3959 | g_free(client); | |
3960 | } | |
3961 | ||
3962 | static void cpu_notify_map_clients(void) | |
3963 | { | |
3964 | MapClient *client; | |
3965 | ||
3966 | while (!QLIST_EMPTY(&map_client_list)) { | |
3967 | client = QLIST_FIRST(&map_client_list); | |
3968 | client->callback(client->opaque); | |
3969 | cpu_unregister_map_client(client); | |
3970 | } | |
3971 | } | |
3972 | ||
3973 | /* Map a physical memory region into a host virtual address. | |
3974 | * May map a subset of the requested range, given by and returned in *plen. | |
3975 | * May return NULL if resources needed to perform the mapping are exhausted. | |
3976 | * Use only for reads OR writes - not for read-modify-write operations. | |
3977 | * Use cpu_register_map_client() to know when retrying the map operation is | |
3978 | * likely to succeed. | |
3979 | */ | |
3980 | void *cpu_physical_memory_map(target_phys_addr_t addr, | |
3981 | target_phys_addr_t *plen, | |
3982 | int is_write) | |
3983 | { | |
3984 | target_phys_addr_t len = *plen; | |
3985 | target_phys_addr_t todo = 0; | |
3986 | int l; | |
3987 | target_phys_addr_t page; | |
3988 | MemoryRegionSection section; | |
3989 | ram_addr_t raddr = RAM_ADDR_MAX; | |
3990 | ram_addr_t rlen; | |
3991 | void *ret; | |
3992 | ||
3993 | while (len > 0) { | |
3994 | page = addr & TARGET_PAGE_MASK; | |
3995 | l = (page + TARGET_PAGE_SIZE) - addr; | |
3996 | if (l > len) | |
3997 | l = len; | |
3998 | section = phys_page_find(page >> TARGET_PAGE_BITS); | |
3999 | ||
4000 | if (!(memory_region_is_ram(section.mr) && !section.readonly)) { | |
4001 | if (todo || bounce.buffer) { | |
4002 | break; | |
4003 | } | |
4004 | bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, TARGET_PAGE_SIZE); | |
4005 | bounce.addr = addr; | |
4006 | bounce.len = l; | |
4007 | if (!is_write) { | |
4008 | cpu_physical_memory_read(addr, bounce.buffer, l); | |
4009 | } | |
4010 | ||
4011 | *plen = l; | |
4012 | return bounce.buffer; | |
4013 | } | |
4014 | if (!todo) { | |
4015 | raddr = memory_region_get_ram_addr(section.mr) | |
4016 | + section.offset_within_region | |
4017 | + (addr & ~TARGET_PAGE_MASK); | |
4018 | } | |
4019 | ||
4020 | len -= l; | |
4021 | addr += l; | |
4022 | todo += l; | |
4023 | } | |
4024 | rlen = todo; | |
4025 | ret = qemu_ram_ptr_length(raddr, &rlen); | |
4026 | *plen = rlen; | |
4027 | return ret; | |
4028 | } | |
4029 | ||
4030 | /* Unmaps a memory region previously mapped by cpu_physical_memory_map(). | |
4031 | * Will also mark the memory as dirty if is_write == 1. access_len gives | |
4032 | * the amount of memory that was actually read or written by the caller. | |
4033 | */ | |
4034 | void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len, | |
4035 | int is_write, target_phys_addr_t access_len) | |
4036 | { | |
4037 | if (buffer != bounce.buffer) { | |
4038 | if (is_write) { | |
4039 | ram_addr_t addr1 = qemu_ram_addr_from_host_nofail(buffer); | |
4040 | while (access_len) { | |
4041 | unsigned l; | |
4042 | l = TARGET_PAGE_SIZE; | |
4043 | if (l > access_len) | |
4044 | l = access_len; | |
4045 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
4046 | /* invalidate code */ | |
4047 | tb_invalidate_phys_page_range(addr1, addr1 + l, 0); | |
4048 | /* set dirty bit */ | |
4049 | cpu_physical_memory_set_dirty_flags( | |
4050 | addr1, (0xff & ~CODE_DIRTY_FLAG)); | |
4051 | } | |
4052 | addr1 += l; | |
4053 | access_len -= l; | |
4054 | } | |
4055 | } | |
4056 | if (xen_enabled()) { | |
4057 | xen_invalidate_map_cache_entry(buffer); | |
4058 | } | |
4059 | return; | |
4060 | } | |
4061 | if (is_write) { | |
4062 | cpu_physical_memory_write(bounce.addr, bounce.buffer, access_len); | |
4063 | } | |
4064 | qemu_vfree(bounce.buffer); | |
4065 | bounce.buffer = NULL; | |
4066 | cpu_notify_map_clients(); | |
4067 | } | |
4068 | ||
4069 | /* warning: addr must be aligned */ | |
4070 | static inline uint32_t ldl_phys_internal(target_phys_addr_t addr, | |
4071 | enum device_endian endian) | |
4072 | { | |
4073 | int io_index; | |
4074 | uint8_t *ptr; | |
4075 | uint32_t val; | |
4076 | MemoryRegionSection section; | |
4077 | ||
4078 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4079 | ||
4080 | if (!is_ram_rom_romd(§ion)) { | |
4081 | /* I/O case */ | |
4082 | io_index = memory_region_get_ram_addr(section.mr) | |
4083 | & (IO_MEM_NB_ENTRIES - 1); | |
4084 | addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region; | |
4085 | val = io_mem_read(io_index, addr, 4); | |
4086 | #if defined(TARGET_WORDS_BIGENDIAN) | |
4087 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
4088 | val = bswap32(val); | |
4089 | } | |
4090 | #else | |
4091 | if (endian == DEVICE_BIG_ENDIAN) { | |
4092 | val = bswap32(val); | |
4093 | } | |
4094 | #endif | |
4095 | } else { | |
4096 | /* RAM case */ | |
4097 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section.mr) | |
4098 | & TARGET_PAGE_MASK) | |
4099 | + section.offset_within_region) + | |
4100 | (addr & ~TARGET_PAGE_MASK); | |
4101 | switch (endian) { | |
4102 | case DEVICE_LITTLE_ENDIAN: | |
4103 | val = ldl_le_p(ptr); | |
4104 | break; | |
4105 | case DEVICE_BIG_ENDIAN: | |
4106 | val = ldl_be_p(ptr); | |
4107 | break; | |
4108 | default: | |
4109 | val = ldl_p(ptr); | |
4110 | break; | |
4111 | } | |
4112 | } | |
4113 | return val; | |
4114 | } | |
4115 | ||
4116 | uint32_t ldl_phys(target_phys_addr_t addr) | |
4117 | { | |
4118 | return ldl_phys_internal(addr, DEVICE_NATIVE_ENDIAN); | |
4119 | } | |
4120 | ||
4121 | uint32_t ldl_le_phys(target_phys_addr_t addr) | |
4122 | { | |
4123 | return ldl_phys_internal(addr, DEVICE_LITTLE_ENDIAN); | |
4124 | } | |
4125 | ||
4126 | uint32_t ldl_be_phys(target_phys_addr_t addr) | |
4127 | { | |
4128 | return ldl_phys_internal(addr, DEVICE_BIG_ENDIAN); | |
4129 | } | |
4130 | ||
4131 | /* warning: addr must be aligned */ | |
4132 | static inline uint64_t ldq_phys_internal(target_phys_addr_t addr, | |
4133 | enum device_endian endian) | |
4134 | { | |
4135 | int io_index; | |
4136 | uint8_t *ptr; | |
4137 | uint64_t val; | |
4138 | MemoryRegionSection section; | |
4139 | ||
4140 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4141 | ||
4142 | if (!is_ram_rom_romd(§ion)) { | |
4143 | /* I/O case */ | |
4144 | io_index = memory_region_get_ram_addr(section.mr) | |
4145 | & (IO_MEM_NB_ENTRIES - 1); | |
4146 | addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region; | |
4147 | ||
4148 | /* XXX This is broken when device endian != cpu endian. | |
4149 | Fix and add "endian" variable check */ | |
4150 | #ifdef TARGET_WORDS_BIGENDIAN | |
4151 | val = io_mem_read(io_index, addr, 4) << 32; | |
4152 | val |= io_mem_read(io_index, addr + 4, 4); | |
4153 | #else | |
4154 | val = io_mem_read(io_index, addr, 4); | |
4155 | val |= io_mem_read(io_index, addr + 4, 4) << 32; | |
4156 | #endif | |
4157 | } else { | |
4158 | /* RAM case */ | |
4159 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section.mr) | |
4160 | & TARGET_PAGE_MASK) | |
4161 | + section.offset_within_region) | |
4162 | + (addr & ~TARGET_PAGE_MASK); | |
4163 | switch (endian) { | |
4164 | case DEVICE_LITTLE_ENDIAN: | |
4165 | val = ldq_le_p(ptr); | |
4166 | break; | |
4167 | case DEVICE_BIG_ENDIAN: | |
4168 | val = ldq_be_p(ptr); | |
4169 | break; | |
4170 | default: | |
4171 | val = ldq_p(ptr); | |
4172 | break; | |
4173 | } | |
4174 | } | |
4175 | return val; | |
4176 | } | |
4177 | ||
4178 | uint64_t ldq_phys(target_phys_addr_t addr) | |
4179 | { | |
4180 | return ldq_phys_internal(addr, DEVICE_NATIVE_ENDIAN); | |
4181 | } | |
4182 | ||
4183 | uint64_t ldq_le_phys(target_phys_addr_t addr) | |
4184 | { | |
4185 | return ldq_phys_internal(addr, DEVICE_LITTLE_ENDIAN); | |
4186 | } | |
4187 | ||
4188 | uint64_t ldq_be_phys(target_phys_addr_t addr) | |
4189 | { | |
4190 | return ldq_phys_internal(addr, DEVICE_BIG_ENDIAN); | |
4191 | } | |
4192 | ||
4193 | /* XXX: optimize */ | |
4194 | uint32_t ldub_phys(target_phys_addr_t addr) | |
4195 | { | |
4196 | uint8_t val; | |
4197 | cpu_physical_memory_read(addr, &val, 1); | |
4198 | return val; | |
4199 | } | |
4200 | ||
4201 | /* warning: addr must be aligned */ | |
4202 | static inline uint32_t lduw_phys_internal(target_phys_addr_t addr, | |
4203 | enum device_endian endian) | |
4204 | { | |
4205 | int io_index; | |
4206 | uint8_t *ptr; | |
4207 | uint64_t val; | |
4208 | MemoryRegionSection section; | |
4209 | ||
4210 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4211 | ||
4212 | if (!is_ram_rom_romd(§ion)) { | |
4213 | /* I/O case */ | |
4214 | io_index = memory_region_get_ram_addr(section.mr) | |
4215 | & (IO_MEM_NB_ENTRIES - 1); | |
4216 | addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region; | |
4217 | val = io_mem_read(io_index, addr, 2); | |
4218 | #if defined(TARGET_WORDS_BIGENDIAN) | |
4219 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
4220 | val = bswap16(val); | |
4221 | } | |
4222 | #else | |
4223 | if (endian == DEVICE_BIG_ENDIAN) { | |
4224 | val = bswap16(val); | |
4225 | } | |
4226 | #endif | |
4227 | } else { | |
4228 | /* RAM case */ | |
4229 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section.mr) | |
4230 | & TARGET_PAGE_MASK) | |
4231 | + section.offset_within_region) | |
4232 | + (addr & ~TARGET_PAGE_MASK); | |
4233 | switch (endian) { | |
4234 | case DEVICE_LITTLE_ENDIAN: | |
4235 | val = lduw_le_p(ptr); | |
4236 | break; | |
4237 | case DEVICE_BIG_ENDIAN: | |
4238 | val = lduw_be_p(ptr); | |
4239 | break; | |
4240 | default: | |
4241 | val = lduw_p(ptr); | |
4242 | break; | |
4243 | } | |
4244 | } | |
4245 | return val; | |
4246 | } | |
4247 | ||
4248 | uint32_t lduw_phys(target_phys_addr_t addr) | |
4249 | { | |
4250 | return lduw_phys_internal(addr, DEVICE_NATIVE_ENDIAN); | |
4251 | } | |
4252 | ||
4253 | uint32_t lduw_le_phys(target_phys_addr_t addr) | |
4254 | { | |
4255 | return lduw_phys_internal(addr, DEVICE_LITTLE_ENDIAN); | |
4256 | } | |
4257 | ||
4258 | uint32_t lduw_be_phys(target_phys_addr_t addr) | |
4259 | { | |
4260 | return lduw_phys_internal(addr, DEVICE_BIG_ENDIAN); | |
4261 | } | |
4262 | ||
4263 | /* warning: addr must be aligned. The ram page is not masked as dirty | |
4264 | and the code inside is not invalidated. It is useful if the dirty | |
4265 | bits are used to track modified PTEs */ | |
4266 | void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val) | |
4267 | { | |
4268 | int io_index; | |
4269 | uint8_t *ptr; | |
4270 | MemoryRegionSection section; | |
4271 | ||
4272 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4273 | ||
4274 | if (!memory_region_is_ram(section.mr) || section.readonly) { | |
4275 | if (memory_region_is_ram(section.mr)) { | |
4276 | io_index = io_mem_rom.ram_addr; | |
4277 | } else { | |
4278 | io_index = memory_region_get_ram_addr(section.mr); | |
4279 | } | |
4280 | addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region; | |
4281 | io_mem_write(io_index, addr, val, 4); | |
4282 | } else { | |
4283 | unsigned long addr1 = (memory_region_get_ram_addr(section.mr) | |
4284 | & TARGET_PAGE_MASK) | |
4285 | + section.offset_within_region | |
4286 | + (addr & ~TARGET_PAGE_MASK); | |
4287 | ptr = qemu_get_ram_ptr(addr1); | |
4288 | stl_p(ptr, val); | |
4289 | ||
4290 | if (unlikely(in_migration)) { | |
4291 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
4292 | /* invalidate code */ | |
4293 | tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); | |
4294 | /* set dirty bit */ | |
4295 | cpu_physical_memory_set_dirty_flags( | |
4296 | addr1, (0xff & ~CODE_DIRTY_FLAG)); | |
4297 | } | |
4298 | } | |
4299 | } | |
4300 | } | |
4301 | ||
4302 | void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val) | |
4303 | { | |
4304 | int io_index; | |
4305 | uint8_t *ptr; | |
4306 | MemoryRegionSection section; | |
4307 | ||
4308 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4309 | ||
4310 | if (!memory_region_is_ram(section.mr) || section.readonly) { | |
4311 | if (memory_region_is_ram(section.mr)) { | |
4312 | io_index = io_mem_rom.ram_addr; | |
4313 | } else { | |
4314 | io_index = memory_region_get_ram_addr(section.mr) | |
4315 | & (IO_MEM_NB_ENTRIES - 1); | |
4316 | } | |
4317 | addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region; | |
4318 | #ifdef TARGET_WORDS_BIGENDIAN | |
4319 | io_mem_write(io_index, addr, val >> 32, 4); | |
4320 | io_mem_write(io_index, addr + 4, (uint32_t)val, 4); | |
4321 | #else | |
4322 | io_mem_write(io_index, addr, (uint32_t)val, 4); | |
4323 | io_mem_write(io_index, addr + 4, val >> 32, 4); | |
4324 | #endif | |
4325 | } else { | |
4326 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section.mr) | |
4327 | & TARGET_PAGE_MASK) | |
4328 | + section.offset_within_region) | |
4329 | + (addr & ~TARGET_PAGE_MASK); | |
4330 | stq_p(ptr, val); | |
4331 | } | |
4332 | } | |
4333 | ||
4334 | /* warning: addr must be aligned */ | |
4335 | static inline void stl_phys_internal(target_phys_addr_t addr, uint32_t val, | |
4336 | enum device_endian endian) | |
4337 | { | |
4338 | int io_index; | |
4339 | uint8_t *ptr; | |
4340 | MemoryRegionSection section; | |
4341 | ||
4342 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4343 | ||
4344 | if (!memory_region_is_ram(section.mr) || section.readonly) { | |
4345 | if (memory_region_is_ram(section.mr)) { | |
4346 | io_index = io_mem_rom.ram_addr; | |
4347 | } else { | |
4348 | io_index = memory_region_get_ram_addr(section.mr) | |
4349 | & (IO_MEM_NB_ENTRIES - 1); | |
4350 | } | |
4351 | addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region; | |
4352 | #if defined(TARGET_WORDS_BIGENDIAN) | |
4353 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
4354 | val = bswap32(val); | |
4355 | } | |
4356 | #else | |
4357 | if (endian == DEVICE_BIG_ENDIAN) { | |
4358 | val = bswap32(val); | |
4359 | } | |
4360 | #endif | |
4361 | io_mem_write(io_index, addr, val, 4); | |
4362 | } else { | |
4363 | unsigned long addr1; | |
4364 | addr1 = (memory_region_get_ram_addr(section.mr) & TARGET_PAGE_MASK) | |
4365 | + section.offset_within_region | |
4366 | + (addr & ~TARGET_PAGE_MASK); | |
4367 | /* RAM case */ | |
4368 | ptr = qemu_get_ram_ptr(addr1); | |
4369 | switch (endian) { | |
4370 | case DEVICE_LITTLE_ENDIAN: | |
4371 | stl_le_p(ptr, val); | |
4372 | break; | |
4373 | case DEVICE_BIG_ENDIAN: | |
4374 | stl_be_p(ptr, val); | |
4375 | break; | |
4376 | default: | |
4377 | stl_p(ptr, val); | |
4378 | break; | |
4379 | } | |
4380 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
4381 | /* invalidate code */ | |
4382 | tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); | |
4383 | /* set dirty bit */ | |
4384 | cpu_physical_memory_set_dirty_flags(addr1, | |
4385 | (0xff & ~CODE_DIRTY_FLAG)); | |
4386 | } | |
4387 | } | |
4388 | } | |
4389 | ||
4390 | void stl_phys(target_phys_addr_t addr, uint32_t val) | |
4391 | { | |
4392 | stl_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN); | |
4393 | } | |
4394 | ||
4395 | void stl_le_phys(target_phys_addr_t addr, uint32_t val) | |
4396 | { | |
4397 | stl_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN); | |
4398 | } | |
4399 | ||
4400 | void stl_be_phys(target_phys_addr_t addr, uint32_t val) | |
4401 | { | |
4402 | stl_phys_internal(addr, val, DEVICE_BIG_ENDIAN); | |
4403 | } | |
4404 | ||
4405 | /* XXX: optimize */ | |
4406 | void stb_phys(target_phys_addr_t addr, uint32_t val) | |
4407 | { | |
4408 | uint8_t v = val; | |
4409 | cpu_physical_memory_write(addr, &v, 1); | |
4410 | } | |
4411 | ||
4412 | /* warning: addr must be aligned */ | |
4413 | static inline void stw_phys_internal(target_phys_addr_t addr, uint32_t val, | |
4414 | enum device_endian endian) | |
4415 | { | |
4416 | int io_index; | |
4417 | uint8_t *ptr; | |
4418 | MemoryRegionSection section; | |
4419 | ||
4420 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4421 | ||
4422 | if (!memory_region_is_ram(section.mr) || section.readonly) { | |
4423 | if (memory_region_is_ram(section.mr)) { | |
4424 | io_index = io_mem_rom.ram_addr; | |
4425 | } else { | |
4426 | io_index = memory_region_get_ram_addr(section.mr) | |
4427 | & (IO_MEM_NB_ENTRIES - 1); | |
4428 | } | |
4429 | addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region; | |
4430 | #if defined(TARGET_WORDS_BIGENDIAN) | |
4431 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
4432 | val = bswap16(val); | |
4433 | } | |
4434 | #else | |
4435 | if (endian == DEVICE_BIG_ENDIAN) { | |
4436 | val = bswap16(val); | |
4437 | } | |
4438 | #endif | |
4439 | io_mem_write(io_index, addr, val, 2); | |
4440 | } else { | |
4441 | unsigned long addr1; | |
4442 | addr1 = (memory_region_get_ram_addr(section.mr) & TARGET_PAGE_MASK) | |
4443 | + section.offset_within_region + (addr & ~TARGET_PAGE_MASK); | |
4444 | /* RAM case */ | |
4445 | ptr = qemu_get_ram_ptr(addr1); | |
4446 | switch (endian) { | |
4447 | case DEVICE_LITTLE_ENDIAN: | |
4448 | stw_le_p(ptr, val); | |
4449 | break; | |
4450 | case DEVICE_BIG_ENDIAN: | |
4451 | stw_be_p(ptr, val); | |
4452 | break; | |
4453 | default: | |
4454 | stw_p(ptr, val); | |
4455 | break; | |
4456 | } | |
4457 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
4458 | /* invalidate code */ | |
4459 | tb_invalidate_phys_page_range(addr1, addr1 + 2, 0); | |
4460 | /* set dirty bit */ | |
4461 | cpu_physical_memory_set_dirty_flags(addr1, | |
4462 | (0xff & ~CODE_DIRTY_FLAG)); | |
4463 | } | |
4464 | } | |
4465 | } | |
4466 | ||
4467 | void stw_phys(target_phys_addr_t addr, uint32_t val) | |
4468 | { | |
4469 | stw_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN); | |
4470 | } | |
4471 | ||
4472 | void stw_le_phys(target_phys_addr_t addr, uint32_t val) | |
4473 | { | |
4474 | stw_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN); | |
4475 | } | |
4476 | ||
4477 | void stw_be_phys(target_phys_addr_t addr, uint32_t val) | |
4478 | { | |
4479 | stw_phys_internal(addr, val, DEVICE_BIG_ENDIAN); | |
4480 | } | |
4481 | ||
4482 | /* XXX: optimize */ | |
4483 | void stq_phys(target_phys_addr_t addr, uint64_t val) | |
4484 | { | |
4485 | val = tswap64(val); | |
4486 | cpu_physical_memory_write(addr, &val, 8); | |
4487 | } | |
4488 | ||
4489 | void stq_le_phys(target_phys_addr_t addr, uint64_t val) | |
4490 | { | |
4491 | val = cpu_to_le64(val); | |
4492 | cpu_physical_memory_write(addr, &val, 8); | |
4493 | } | |
4494 | ||
4495 | void stq_be_phys(target_phys_addr_t addr, uint64_t val) | |
4496 | { | |
4497 | val = cpu_to_be64(val); | |
4498 | cpu_physical_memory_write(addr, &val, 8); | |
4499 | } | |
4500 | ||
4501 | /* virtual memory access for debug (includes writing to ROM) */ | |
4502 | int cpu_memory_rw_debug(CPUState *env, target_ulong addr, | |
4503 | uint8_t *buf, int len, int is_write) | |
4504 | { | |
4505 | int l; | |
4506 | target_phys_addr_t phys_addr; | |
4507 | target_ulong page; | |
4508 | ||
4509 | while (len > 0) { | |
4510 | page = addr & TARGET_PAGE_MASK; | |
4511 | phys_addr = cpu_get_phys_page_debug(env, page); | |
4512 | /* if no physical page mapped, return an error */ | |
4513 | if (phys_addr == -1) | |
4514 | return -1; | |
4515 | l = (page + TARGET_PAGE_SIZE) - addr; | |
4516 | if (l > len) | |
4517 | l = len; | |
4518 | phys_addr += (addr & ~TARGET_PAGE_MASK); | |
4519 | if (is_write) | |
4520 | cpu_physical_memory_write_rom(phys_addr, buf, l); | |
4521 | else | |
4522 | cpu_physical_memory_rw(phys_addr, buf, l, is_write); | |
4523 | len -= l; | |
4524 | buf += l; | |
4525 | addr += l; | |
4526 | } | |
4527 | return 0; | |
4528 | } | |
4529 | #endif | |
4530 | ||
4531 | /* in deterministic execution mode, instructions doing device I/Os | |
4532 | must be at the end of the TB */ | |
4533 | void cpu_io_recompile(CPUState *env, void *retaddr) | |
4534 | { | |
4535 | TranslationBlock *tb; | |
4536 | uint32_t n, cflags; | |
4537 | target_ulong pc, cs_base; | |
4538 | uint64_t flags; | |
4539 | ||
4540 | tb = tb_find_pc((unsigned long)retaddr); | |
4541 | if (!tb) { | |
4542 | cpu_abort(env, "cpu_io_recompile: could not find TB for pc=%p", | |
4543 | retaddr); | |
4544 | } | |
4545 | n = env->icount_decr.u16.low + tb->icount; | |
4546 | cpu_restore_state(tb, env, (unsigned long)retaddr); | |
4547 | /* Calculate how many instructions had been executed before the fault | |
4548 | occurred. */ | |
4549 | n = n - env->icount_decr.u16.low; | |
4550 | /* Generate a new TB ending on the I/O insn. */ | |
4551 | n++; | |
4552 | /* On MIPS and SH, delay slot instructions can only be restarted if | |
4553 | they were already the first instruction in the TB. If this is not | |
4554 | the first instruction in a TB then re-execute the preceding | |
4555 | branch. */ | |
4556 | #if defined(TARGET_MIPS) | |
4557 | if ((env->hflags & MIPS_HFLAG_BMASK) != 0 && n > 1) { | |
4558 | env->active_tc.PC -= 4; | |
4559 | env->icount_decr.u16.low++; | |
4560 | env->hflags &= ~MIPS_HFLAG_BMASK; | |
4561 | } | |
4562 | #elif defined(TARGET_SH4) | |
4563 | if ((env->flags & ((DELAY_SLOT | DELAY_SLOT_CONDITIONAL))) != 0 | |
4564 | && n > 1) { | |
4565 | env->pc -= 2; | |
4566 | env->icount_decr.u16.low++; | |
4567 | env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL); | |
4568 | } | |
4569 | #endif | |
4570 | /* This should never happen. */ | |
4571 | if (n > CF_COUNT_MASK) | |
4572 | cpu_abort(env, "TB too big during recompile"); | |
4573 | ||
4574 | cflags = n | CF_LAST_IO; | |
4575 | pc = tb->pc; | |
4576 | cs_base = tb->cs_base; | |
4577 | flags = tb->flags; | |
4578 | tb_phys_invalidate(tb, -1); | |
4579 | /* FIXME: In theory this could raise an exception. In practice | |
4580 | we have already translated the block once so it's probably ok. */ | |
4581 | tb_gen_code(env, pc, cs_base, flags, cflags); | |
4582 | /* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not | |
4583 | the first in the TB) then we end up generating a whole new TB and | |
4584 | repeating the fault, which is horribly inefficient. | |
4585 | Better would be to execute just this insn uncached, or generate a | |
4586 | second new TB. */ | |
4587 | cpu_resume_from_signal(env, NULL); | |
4588 | } | |
4589 | ||
4590 | #if !defined(CONFIG_USER_ONLY) | |
4591 | ||
4592 | void dump_exec_info(FILE *f, fprintf_function cpu_fprintf) | |
4593 | { | |
4594 | int i, target_code_size, max_target_code_size; | |
4595 | int direct_jmp_count, direct_jmp2_count, cross_page; | |
4596 | TranslationBlock *tb; | |
4597 | ||
4598 | target_code_size = 0; | |
4599 | max_target_code_size = 0; | |
4600 | cross_page = 0; | |
4601 | direct_jmp_count = 0; | |
4602 | direct_jmp2_count = 0; | |
4603 | for(i = 0; i < nb_tbs; i++) { | |
4604 | tb = &tbs[i]; | |
4605 | target_code_size += tb->size; | |
4606 | if (tb->size > max_target_code_size) | |
4607 | max_target_code_size = tb->size; | |
4608 | if (tb->page_addr[1] != -1) | |
4609 | cross_page++; | |
4610 | if (tb->tb_next_offset[0] != 0xffff) { | |
4611 | direct_jmp_count++; | |
4612 | if (tb->tb_next_offset[1] != 0xffff) { | |
4613 | direct_jmp2_count++; | |
4614 | } | |
4615 | } | |
4616 | } | |
4617 | /* XXX: avoid using doubles ? */ | |
4618 | cpu_fprintf(f, "Translation buffer state:\n"); | |
4619 | cpu_fprintf(f, "gen code size %td/%ld\n", | |
4620 | code_gen_ptr - code_gen_buffer, code_gen_buffer_max_size); | |
4621 | cpu_fprintf(f, "TB count %d/%d\n", | |
4622 | nb_tbs, code_gen_max_blocks); | |
4623 | cpu_fprintf(f, "TB avg target size %d max=%d bytes\n", | |
4624 | nb_tbs ? target_code_size / nb_tbs : 0, | |
4625 | max_target_code_size); | |
4626 | cpu_fprintf(f, "TB avg host size %td bytes (expansion ratio: %0.1f)\n", | |
4627 | nb_tbs ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0, | |
4628 | target_code_size ? (double) (code_gen_ptr - code_gen_buffer) / target_code_size : 0); | |
4629 | cpu_fprintf(f, "cross page TB count %d (%d%%)\n", | |
4630 | cross_page, | |
4631 | nb_tbs ? (cross_page * 100) / nb_tbs : 0); | |
4632 | cpu_fprintf(f, "direct jump count %d (%d%%) (2 jumps=%d %d%%)\n", | |
4633 | direct_jmp_count, | |
4634 | nb_tbs ? (direct_jmp_count * 100) / nb_tbs : 0, | |
4635 | direct_jmp2_count, | |
4636 | nb_tbs ? (direct_jmp2_count * 100) / nb_tbs : 0); | |
4637 | cpu_fprintf(f, "\nStatistics:\n"); | |
4638 | cpu_fprintf(f, "TB flush count %d\n", tb_flush_count); | |
4639 | cpu_fprintf(f, "TB invalidate count %d\n", tb_phys_invalidate_count); | |
4640 | cpu_fprintf(f, "TLB flush count %d\n", tlb_flush_count); | |
4641 | tcg_dump_info(f, cpu_fprintf); | |
4642 | } | |
4643 | ||
4644 | /* NOTE: this function can trigger an exception */ | |
4645 | /* NOTE2: the returned address is not exactly the physical address: it | |
4646 | is the offset relative to phys_ram_base */ | |
4647 | tb_page_addr_t get_page_addr_code(CPUState *env1, target_ulong addr) | |
4648 | { | |
4649 | int mmu_idx, page_index, pd; | |
4650 | void *p; | |
4651 | ||
4652 | page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
4653 | mmu_idx = cpu_mmu_index(env1); | |
4654 | if (unlikely(env1->tlb_table[mmu_idx][page_index].addr_code != | |
4655 | (addr & TARGET_PAGE_MASK))) { | |
4656 | ldub_code(addr); | |
4657 | } | |
4658 | pd = env1->tlb_table[mmu_idx][page_index].addr_code & ~TARGET_PAGE_MASK; | |
4659 | if (pd != io_mem_ram.ram_addr && pd != io_mem_rom.ram_addr | |
4660 | && !io_mem_region[pd]->rom_device) { | |
4661 | #if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SPARC) | |
4662 | cpu_unassigned_access(env1, addr, 0, 1, 0, 4); | |
4663 | #else | |
4664 | cpu_abort(env1, "Trying to execute code outside RAM or ROM at 0x" TARGET_FMT_lx "\n", addr); | |
4665 | #endif | |
4666 | } | |
4667 | p = (void *)((uintptr_t)addr + env1->tlb_table[mmu_idx][page_index].addend); | |
4668 | return qemu_ram_addr_from_host_nofail(p); | |
4669 | } | |
4670 | ||
4671 | /* | |
4672 | * A helper function for the _utterly broken_ virtio device model to find out if | |
4673 | * it's running on a big endian machine. Don't do this at home kids! | |
4674 | */ | |
4675 | bool virtio_is_big_endian(void); | |
4676 | bool virtio_is_big_endian(void) | |
4677 | { | |
4678 | #if defined(TARGET_WORDS_BIGENDIAN) | |
4679 | return true; | |
4680 | #else | |
4681 | return false; | |
4682 | #endif | |
4683 | } | |
4684 | ||
4685 | #define MMUSUFFIX _cmmu | |
4686 | #undef GETPC | |
4687 | #define GETPC() NULL | |
4688 | #define env cpu_single_env | |
4689 | #define SOFTMMU_CODE_ACCESS | |
4690 | ||
4691 | #define SHIFT 0 | |
4692 | #include "softmmu_template.h" | |
4693 | ||
4694 | #define SHIFT 1 | |
4695 | #include "softmmu_template.h" | |
4696 | ||
4697 | #define SHIFT 2 | |
4698 | #include "softmmu_template.h" | |
4699 | ||
4700 | #define SHIFT 3 | |
4701 | #include "softmmu_template.h" | |
4702 | ||
4703 | #undef env | |
4704 | ||
4705 | #endif |