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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 | uint16_t is_leaf : 1; | |
197 | /* index into phys_sections (is_leaf) or phys_map_nodes (!is_leaf) */ | |
198 | uint16_t ptr : 15; | |
199 | }; | |
200 | ||
201 | /* Simple allocator for PhysPageEntry nodes */ | |
202 | static PhysPageEntry (*phys_map_nodes)[L2_SIZE]; | |
203 | static unsigned phys_map_nodes_nb, phys_map_nodes_nb_alloc; | |
204 | ||
205 | #define PHYS_MAP_NODE_NIL (((uint16_t)~0) >> 1) | |
206 | ||
207 | /* This is a multi-level map on the physical address space. | |
208 | The bottom level has pointers to MemoryRegionSections. */ | |
209 | static PhysPageEntry phys_map = { .ptr = PHYS_MAP_NODE_NIL, .is_leaf = 0 }; | |
210 | ||
211 | static void io_mem_init(void); | |
212 | static void memory_map_init(void); | |
213 | ||
214 | /* io memory support */ | |
215 | MemoryRegion *io_mem_region[IO_MEM_NB_ENTRIES]; | |
216 | static char io_mem_used[IO_MEM_NB_ENTRIES]; | |
217 | static MemoryRegion io_mem_watch; | |
218 | #endif | |
219 | ||
220 | /* log support */ | |
221 | #ifdef WIN32 | |
222 | static const char *logfilename = "qemu.log"; | |
223 | #else | |
224 | static const char *logfilename = "/tmp/qemu.log"; | |
225 | #endif | |
226 | FILE *logfile; | |
227 | int loglevel; | |
228 | static int log_append = 0; | |
229 | ||
230 | /* statistics */ | |
231 | #if !defined(CONFIG_USER_ONLY) | |
232 | static int tlb_flush_count; | |
233 | #endif | |
234 | static int tb_flush_count; | |
235 | static int tb_phys_invalidate_count; | |
236 | ||
237 | #ifdef _WIN32 | |
238 | static void map_exec(void *addr, long size) | |
239 | { | |
240 | DWORD old_protect; | |
241 | VirtualProtect(addr, size, | |
242 | PAGE_EXECUTE_READWRITE, &old_protect); | |
243 | ||
244 | } | |
245 | #else | |
246 | static void map_exec(void *addr, long size) | |
247 | { | |
248 | unsigned long start, end, page_size; | |
249 | ||
250 | page_size = getpagesize(); | |
251 | start = (unsigned long)addr; | |
252 | start &= ~(page_size - 1); | |
253 | ||
254 | end = (unsigned long)addr + size; | |
255 | end += page_size - 1; | |
256 | end &= ~(page_size - 1); | |
257 | ||
258 | mprotect((void *)start, end - start, | |
259 | PROT_READ | PROT_WRITE | PROT_EXEC); | |
260 | } | |
261 | #endif | |
262 | ||
263 | static void page_init(void) | |
264 | { | |
265 | /* NOTE: we can always suppose that qemu_host_page_size >= | |
266 | TARGET_PAGE_SIZE */ | |
267 | #ifdef _WIN32 | |
268 | { | |
269 | SYSTEM_INFO system_info; | |
270 | ||
271 | GetSystemInfo(&system_info); | |
272 | qemu_real_host_page_size = system_info.dwPageSize; | |
273 | } | |
274 | #else | |
275 | qemu_real_host_page_size = getpagesize(); | |
276 | #endif | |
277 | if (qemu_host_page_size == 0) | |
278 | qemu_host_page_size = qemu_real_host_page_size; | |
279 | if (qemu_host_page_size < TARGET_PAGE_SIZE) | |
280 | qemu_host_page_size = TARGET_PAGE_SIZE; | |
281 | qemu_host_page_mask = ~(qemu_host_page_size - 1); | |
282 | ||
283 | #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY) | |
284 | { | |
285 | #ifdef HAVE_KINFO_GETVMMAP | |
286 | struct kinfo_vmentry *freep; | |
287 | int i, cnt; | |
288 | ||
289 | freep = kinfo_getvmmap(getpid(), &cnt); | |
290 | if (freep) { | |
291 | mmap_lock(); | |
292 | for (i = 0; i < cnt; i++) { | |
293 | unsigned long startaddr, endaddr; | |
294 | ||
295 | startaddr = freep[i].kve_start; | |
296 | endaddr = freep[i].kve_end; | |
297 | if (h2g_valid(startaddr)) { | |
298 | startaddr = h2g(startaddr) & TARGET_PAGE_MASK; | |
299 | ||
300 | if (h2g_valid(endaddr)) { | |
301 | endaddr = h2g(endaddr); | |
302 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); | |
303 | } else { | |
304 | #if TARGET_ABI_BITS <= L1_MAP_ADDR_SPACE_BITS | |
305 | endaddr = ~0ul; | |
306 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); | |
307 | #endif | |
308 | } | |
309 | } | |
310 | } | |
311 | free(freep); | |
312 | mmap_unlock(); | |
313 | } | |
314 | #else | |
315 | FILE *f; | |
316 | ||
317 | last_brk = (unsigned long)sbrk(0); | |
318 | ||
319 | f = fopen("/compat/linux/proc/self/maps", "r"); | |
320 | if (f) { | |
321 | mmap_lock(); | |
322 | ||
323 | do { | |
324 | unsigned long startaddr, endaddr; | |
325 | int n; | |
326 | ||
327 | n = fscanf (f, "%lx-%lx %*[^\n]\n", &startaddr, &endaddr); | |
328 | ||
329 | if (n == 2 && h2g_valid(startaddr)) { | |
330 | startaddr = h2g(startaddr) & TARGET_PAGE_MASK; | |
331 | ||
332 | if (h2g_valid(endaddr)) { | |
333 | endaddr = h2g(endaddr); | |
334 | } else { | |
335 | endaddr = ~0ul; | |
336 | } | |
337 | page_set_flags(startaddr, endaddr, PAGE_RESERVED); | |
338 | } | |
339 | } while (!feof(f)); | |
340 | ||
341 | fclose(f); | |
342 | mmap_unlock(); | |
343 | } | |
344 | #endif | |
345 | } | |
346 | #endif | |
347 | } | |
348 | ||
349 | static PageDesc *page_find_alloc(tb_page_addr_t index, int alloc) | |
350 | { | |
351 | PageDesc *pd; | |
352 | void **lp; | |
353 | int i; | |
354 | ||
355 | #if defined(CONFIG_USER_ONLY) | |
356 | /* We can't use g_malloc because it may recurse into a locked mutex. */ | |
357 | # define ALLOC(P, SIZE) \ | |
358 | do { \ | |
359 | P = mmap(NULL, SIZE, PROT_READ | PROT_WRITE, \ | |
360 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \ | |
361 | } while (0) | |
362 | #else | |
363 | # define ALLOC(P, SIZE) \ | |
364 | do { P = g_malloc0(SIZE); } while (0) | |
365 | #endif | |
366 | ||
367 | /* Level 1. Always allocated. */ | |
368 | lp = l1_map + ((index >> V_L1_SHIFT) & (V_L1_SIZE - 1)); | |
369 | ||
370 | /* Level 2..N-1. */ | |
371 | for (i = V_L1_SHIFT / L2_BITS - 1; i > 0; i--) { | |
372 | void **p = *lp; | |
373 | ||
374 | if (p == NULL) { | |
375 | if (!alloc) { | |
376 | return NULL; | |
377 | } | |
378 | ALLOC(p, sizeof(void *) * L2_SIZE); | |
379 | *lp = p; | |
380 | } | |
381 | ||
382 | lp = p + ((index >> (i * L2_BITS)) & (L2_SIZE - 1)); | |
383 | } | |
384 | ||
385 | pd = *lp; | |
386 | if (pd == NULL) { | |
387 | if (!alloc) { | |
388 | return NULL; | |
389 | } | |
390 | ALLOC(pd, sizeof(PageDesc) * L2_SIZE); | |
391 | *lp = pd; | |
392 | } | |
393 | ||
394 | #undef ALLOC | |
395 | ||
396 | return pd + (index & (L2_SIZE - 1)); | |
397 | } | |
398 | ||
399 | static inline PageDesc *page_find(tb_page_addr_t index) | |
400 | { | |
401 | return page_find_alloc(index, 0); | |
402 | } | |
403 | ||
404 | #if !defined(CONFIG_USER_ONLY) | |
405 | ||
406 | static void phys_map_node_reserve(unsigned nodes) | |
407 | { | |
408 | if (phys_map_nodes_nb + nodes > phys_map_nodes_nb_alloc) { | |
409 | typedef PhysPageEntry Node[L2_SIZE]; | |
410 | phys_map_nodes_nb_alloc = MAX(phys_map_nodes_nb_alloc * 2, 16); | |
411 | phys_map_nodes_nb_alloc = MAX(phys_map_nodes_nb_alloc, | |
412 | phys_map_nodes_nb + nodes); | |
413 | phys_map_nodes = g_renew(Node, phys_map_nodes, | |
414 | phys_map_nodes_nb_alloc); | |
415 | } | |
416 | } | |
417 | ||
418 | static uint16_t phys_map_node_alloc(void) | |
419 | { | |
420 | unsigned i; | |
421 | uint16_t ret; | |
422 | ||
423 | ret = phys_map_nodes_nb++; | |
424 | assert(ret != PHYS_MAP_NODE_NIL); | |
425 | assert(ret != phys_map_nodes_nb_alloc); | |
426 | for (i = 0; i < L2_SIZE; ++i) { | |
427 | phys_map_nodes[ret][i].is_leaf = 0; | |
428 | phys_map_nodes[ret][i].ptr = PHYS_MAP_NODE_NIL; | |
429 | } | |
430 | return ret; | |
431 | } | |
432 | ||
433 | static void phys_map_nodes_reset(void) | |
434 | { | |
435 | phys_map_nodes_nb = 0; | |
436 | } | |
437 | ||
438 | ||
439 | static void phys_page_set_level(PhysPageEntry *lp, target_phys_addr_t *index, | |
440 | target_phys_addr_t *nb, uint16_t leaf, | |
441 | int level) | |
442 | { | |
443 | PhysPageEntry *p; | |
444 | int i; | |
445 | target_phys_addr_t step = (target_phys_addr_t)1 << (level * L2_BITS); | |
446 | ||
447 | if (!lp->is_leaf && lp->ptr == PHYS_MAP_NODE_NIL) { | |
448 | lp->ptr = phys_map_node_alloc(); | |
449 | p = phys_map_nodes[lp->ptr]; | |
450 | if (level == 0) { | |
451 | for (i = 0; i < L2_SIZE; i++) { | |
452 | p[i].is_leaf = 1; | |
453 | p[i].ptr = phys_section_unassigned; | |
454 | } | |
455 | } | |
456 | } else { | |
457 | p = phys_map_nodes[lp->ptr]; | |
458 | } | |
459 | lp = &p[(*index >> (level * L2_BITS)) & (L2_SIZE - 1)]; | |
460 | ||
461 | while (*nb && lp < &p[L2_SIZE]) { | |
462 | if ((*index & (step - 1)) == 0 && *nb >= step) { | |
463 | lp->is_leaf = true; | |
464 | lp->ptr = leaf; | |
465 | *index += step; | |
466 | *nb -= step; | |
467 | } else { | |
468 | phys_page_set_level(lp, index, nb, leaf, level - 1); | |
469 | } | |
470 | ++lp; | |
471 | } | |
472 | } | |
473 | ||
474 | static void phys_page_set(target_phys_addr_t index, target_phys_addr_t nb, | |
475 | uint16_t leaf) | |
476 | { | |
477 | /* Wildly overreserve - it doesn't matter much. */ | |
478 | phys_map_node_reserve(3 * P_L2_LEVELS); | |
479 | ||
480 | phys_page_set_level(&phys_map, &index, &nb, leaf, P_L2_LEVELS - 1); | |
481 | } | |
482 | ||
483 | static MemoryRegionSection *phys_page_find(target_phys_addr_t index) | |
484 | { | |
485 | PhysPageEntry lp = phys_map; | |
486 | PhysPageEntry *p; | |
487 | int i; | |
488 | uint16_t s_index = phys_section_unassigned; | |
489 | ||
490 | for (i = P_L2_LEVELS - 1; i >= 0 && !lp.is_leaf; i--) { | |
491 | if (lp.ptr == PHYS_MAP_NODE_NIL) { | |
492 | goto not_found; | |
493 | } | |
494 | p = phys_map_nodes[lp.ptr]; | |
495 | lp = p[(index >> (i * L2_BITS)) & (L2_SIZE - 1)]; | |
496 | } | |
497 | ||
498 | s_index = lp.ptr; | |
499 | not_found: | |
500 | return &phys_sections[s_index]; | |
501 | } | |
502 | ||
503 | static target_phys_addr_t section_addr(MemoryRegionSection *section, | |
504 | target_phys_addr_t addr) | |
505 | { | |
506 | addr -= section->offset_within_address_space; | |
507 | addr += section->offset_within_region; | |
508 | return addr; | |
509 | } | |
510 | ||
511 | static void tlb_protect_code(ram_addr_t ram_addr); | |
512 | static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr, | |
513 | target_ulong vaddr); | |
514 | #define mmap_lock() do { } while(0) | |
515 | #define mmap_unlock() do { } while(0) | |
516 | #endif | |
517 | ||
518 | #define DEFAULT_CODE_GEN_BUFFER_SIZE (32 * 1024 * 1024) | |
519 | ||
520 | #if defined(CONFIG_USER_ONLY) | |
521 | /* Currently it is not recommended to allocate big chunks of data in | |
522 | user mode. It will change when a dedicated libc will be used */ | |
523 | #define USE_STATIC_CODE_GEN_BUFFER | |
524 | #endif | |
525 | ||
526 | #ifdef USE_STATIC_CODE_GEN_BUFFER | |
527 | static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE] | |
528 | __attribute__((aligned (CODE_GEN_ALIGN))); | |
529 | #endif | |
530 | ||
531 | static void code_gen_alloc(unsigned long tb_size) | |
532 | { | |
533 | #ifdef USE_STATIC_CODE_GEN_BUFFER | |
534 | code_gen_buffer = static_code_gen_buffer; | |
535 | code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE; | |
536 | map_exec(code_gen_buffer, code_gen_buffer_size); | |
537 | #else | |
538 | code_gen_buffer_size = tb_size; | |
539 | if (code_gen_buffer_size == 0) { | |
540 | #if defined(CONFIG_USER_ONLY) | |
541 | code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE; | |
542 | #else | |
543 | /* XXX: needs adjustments */ | |
544 | code_gen_buffer_size = (unsigned long)(ram_size / 4); | |
545 | #endif | |
546 | } | |
547 | if (code_gen_buffer_size < MIN_CODE_GEN_BUFFER_SIZE) | |
548 | code_gen_buffer_size = MIN_CODE_GEN_BUFFER_SIZE; | |
549 | /* The code gen buffer location may have constraints depending on | |
550 | the host cpu and OS */ | |
551 | #if defined(__linux__) | |
552 | { | |
553 | int flags; | |
554 | void *start = NULL; | |
555 | ||
556 | flags = MAP_PRIVATE | MAP_ANONYMOUS; | |
557 | #if defined(__x86_64__) | |
558 | flags |= MAP_32BIT; | |
559 | /* Cannot map more than that */ | |
560 | if (code_gen_buffer_size > (800 * 1024 * 1024)) | |
561 | code_gen_buffer_size = (800 * 1024 * 1024); | |
562 | #elif defined(__sparc_v9__) | |
563 | // Map the buffer below 2G, so we can use direct calls and branches | |
564 | flags |= MAP_FIXED; | |
565 | start = (void *) 0x60000000UL; | |
566 | if (code_gen_buffer_size > (512 * 1024 * 1024)) | |
567 | code_gen_buffer_size = (512 * 1024 * 1024); | |
568 | #elif defined(__arm__) | |
569 | /* Keep the buffer no bigger than 16MB to branch between blocks */ | |
570 | if (code_gen_buffer_size > 16 * 1024 * 1024) | |
571 | code_gen_buffer_size = 16 * 1024 * 1024; | |
572 | #elif defined(__s390x__) | |
573 | /* Map the buffer so that we can use direct calls and branches. */ | |
574 | /* We have a +- 4GB range on the branches; leave some slop. */ | |
575 | if (code_gen_buffer_size > (3ul * 1024 * 1024 * 1024)) { | |
576 | code_gen_buffer_size = 3ul * 1024 * 1024 * 1024; | |
577 | } | |
578 | start = (void *)0x90000000UL; | |
579 | #endif | |
580 | code_gen_buffer = mmap(start, code_gen_buffer_size, | |
581 | PROT_WRITE | PROT_READ | PROT_EXEC, | |
582 | flags, -1, 0); | |
583 | if (code_gen_buffer == MAP_FAILED) { | |
584 | fprintf(stderr, "Could not allocate dynamic translator buffer\n"); | |
585 | exit(1); | |
586 | } | |
587 | } | |
588 | #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) \ | |
589 | || defined(__DragonFly__) || defined(__OpenBSD__) \ | |
590 | || defined(__NetBSD__) | |
591 | { | |
592 | int flags; | |
593 | void *addr = NULL; | |
594 | flags = MAP_PRIVATE | MAP_ANONYMOUS; | |
595 | #if defined(__x86_64__) | |
596 | /* FreeBSD doesn't have MAP_32BIT, use MAP_FIXED and assume | |
597 | * 0x40000000 is free */ | |
598 | flags |= MAP_FIXED; | |
599 | addr = (void *)0x40000000; | |
600 | /* Cannot map more than that */ | |
601 | if (code_gen_buffer_size > (800 * 1024 * 1024)) | |
602 | code_gen_buffer_size = (800 * 1024 * 1024); | |
603 | #elif defined(__sparc_v9__) | |
604 | // Map the buffer below 2G, so we can use direct calls and branches | |
605 | flags |= MAP_FIXED; | |
606 | addr = (void *) 0x60000000UL; | |
607 | if (code_gen_buffer_size > (512 * 1024 * 1024)) { | |
608 | code_gen_buffer_size = (512 * 1024 * 1024); | |
609 | } | |
610 | #endif | |
611 | code_gen_buffer = mmap(addr, code_gen_buffer_size, | |
612 | PROT_WRITE | PROT_READ | PROT_EXEC, | |
613 | flags, -1, 0); | |
614 | if (code_gen_buffer == MAP_FAILED) { | |
615 | fprintf(stderr, "Could not allocate dynamic translator buffer\n"); | |
616 | exit(1); | |
617 | } | |
618 | } | |
619 | #else | |
620 | code_gen_buffer = g_malloc(code_gen_buffer_size); | |
621 | map_exec(code_gen_buffer, code_gen_buffer_size); | |
622 | #endif | |
623 | #endif /* !USE_STATIC_CODE_GEN_BUFFER */ | |
624 | map_exec(code_gen_prologue, sizeof(code_gen_prologue)); | |
625 | code_gen_buffer_max_size = code_gen_buffer_size - | |
626 | (TCG_MAX_OP_SIZE * OPC_BUF_SIZE); | |
627 | code_gen_max_blocks = code_gen_buffer_size / CODE_GEN_AVG_BLOCK_SIZE; | |
628 | tbs = g_malloc(code_gen_max_blocks * sizeof(TranslationBlock)); | |
629 | } | |
630 | ||
631 | /* Must be called before using the QEMU cpus. 'tb_size' is the size | |
632 | (in bytes) allocated to the translation buffer. Zero means default | |
633 | size. */ | |
634 | void tcg_exec_init(unsigned long tb_size) | |
635 | { | |
636 | cpu_gen_init(); | |
637 | code_gen_alloc(tb_size); | |
638 | code_gen_ptr = code_gen_buffer; | |
639 | page_init(); | |
640 | #if !defined(CONFIG_USER_ONLY) || !defined(CONFIG_USE_GUEST_BASE) | |
641 | /* There's no guest base to take into account, so go ahead and | |
642 | initialize the prologue now. */ | |
643 | tcg_prologue_init(&tcg_ctx); | |
644 | #endif | |
645 | } | |
646 | ||
647 | bool tcg_enabled(void) | |
648 | { | |
649 | return code_gen_buffer != NULL; | |
650 | } | |
651 | ||
652 | void cpu_exec_init_all(void) | |
653 | { | |
654 | #if !defined(CONFIG_USER_ONLY) | |
655 | memory_map_init(); | |
656 | io_mem_init(); | |
657 | #endif | |
658 | } | |
659 | ||
660 | #if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY) | |
661 | ||
662 | static int cpu_common_post_load(void *opaque, int version_id) | |
663 | { | |
664 | CPUState *env = opaque; | |
665 | ||
666 | /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the | |
667 | version_id is increased. */ | |
668 | env->interrupt_request &= ~0x01; | |
669 | tlb_flush(env, 1); | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
674 | static const VMStateDescription vmstate_cpu_common = { | |
675 | .name = "cpu_common", | |
676 | .version_id = 1, | |
677 | .minimum_version_id = 1, | |
678 | .minimum_version_id_old = 1, | |
679 | .post_load = cpu_common_post_load, | |
680 | .fields = (VMStateField []) { | |
681 | VMSTATE_UINT32(halted, CPUState), | |
682 | VMSTATE_UINT32(interrupt_request, CPUState), | |
683 | VMSTATE_END_OF_LIST() | |
684 | } | |
685 | }; | |
686 | #endif | |
687 | ||
688 | CPUState *qemu_get_cpu(int cpu) | |
689 | { | |
690 | CPUState *env = first_cpu; | |
691 | ||
692 | while (env) { | |
693 | if (env->cpu_index == cpu) | |
694 | break; | |
695 | env = env->next_cpu; | |
696 | } | |
697 | ||
698 | return env; | |
699 | } | |
700 | ||
701 | void cpu_exec_init(CPUState *env) | |
702 | { | |
703 | CPUState **penv; | |
704 | int cpu_index; | |
705 | ||
706 | #if defined(CONFIG_USER_ONLY) | |
707 | cpu_list_lock(); | |
708 | #endif | |
709 | env->next_cpu = NULL; | |
710 | penv = &first_cpu; | |
711 | cpu_index = 0; | |
712 | while (*penv != NULL) { | |
713 | penv = &(*penv)->next_cpu; | |
714 | cpu_index++; | |
715 | } | |
716 | env->cpu_index = cpu_index; | |
717 | env->numa_node = 0; | |
718 | QTAILQ_INIT(&env->breakpoints); | |
719 | QTAILQ_INIT(&env->watchpoints); | |
720 | #ifndef CONFIG_USER_ONLY | |
721 | env->thread_id = qemu_get_thread_id(); | |
722 | #endif | |
723 | *penv = env; | |
724 | #if defined(CONFIG_USER_ONLY) | |
725 | cpu_list_unlock(); | |
726 | #endif | |
727 | #if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY) | |
728 | vmstate_register(NULL, cpu_index, &vmstate_cpu_common, env); | |
729 | register_savevm(NULL, "cpu", cpu_index, CPU_SAVE_VERSION, | |
730 | cpu_save, cpu_load, env); | |
731 | #endif | |
732 | } | |
733 | ||
734 | /* Allocate a new translation block. Flush the translation buffer if | |
735 | too many translation blocks or too much generated code. */ | |
736 | static TranslationBlock *tb_alloc(target_ulong pc) | |
737 | { | |
738 | TranslationBlock *tb; | |
739 | ||
740 | if (nb_tbs >= code_gen_max_blocks || | |
741 | (code_gen_ptr - code_gen_buffer) >= code_gen_buffer_max_size) | |
742 | return NULL; | |
743 | tb = &tbs[nb_tbs++]; | |
744 | tb->pc = pc; | |
745 | tb->cflags = 0; | |
746 | return tb; | |
747 | } | |
748 | ||
749 | void tb_free(TranslationBlock *tb) | |
750 | { | |
751 | /* In practice this is mostly used for single use temporary TB | |
752 | Ignore the hard cases and just back up if this TB happens to | |
753 | be the last one generated. */ | |
754 | if (nb_tbs > 0 && tb == &tbs[nb_tbs - 1]) { | |
755 | code_gen_ptr = tb->tc_ptr; | |
756 | nb_tbs--; | |
757 | } | |
758 | } | |
759 | ||
760 | static inline void invalidate_page_bitmap(PageDesc *p) | |
761 | { | |
762 | if (p->code_bitmap) { | |
763 | g_free(p->code_bitmap); | |
764 | p->code_bitmap = NULL; | |
765 | } | |
766 | p->code_write_count = 0; | |
767 | } | |
768 | ||
769 | /* Set to NULL all the 'first_tb' fields in all PageDescs. */ | |
770 | ||
771 | static void page_flush_tb_1 (int level, void **lp) | |
772 | { | |
773 | int i; | |
774 | ||
775 | if (*lp == NULL) { | |
776 | return; | |
777 | } | |
778 | if (level == 0) { | |
779 | PageDesc *pd = *lp; | |
780 | for (i = 0; i < L2_SIZE; ++i) { | |
781 | pd[i].first_tb = NULL; | |
782 | invalidate_page_bitmap(pd + i); | |
783 | } | |
784 | } else { | |
785 | void **pp = *lp; | |
786 | for (i = 0; i < L2_SIZE; ++i) { | |
787 | page_flush_tb_1 (level - 1, pp + i); | |
788 | } | |
789 | } | |
790 | } | |
791 | ||
792 | static void page_flush_tb(void) | |
793 | { | |
794 | int i; | |
795 | for (i = 0; i < V_L1_SIZE; i++) { | |
796 | page_flush_tb_1(V_L1_SHIFT / L2_BITS - 1, l1_map + i); | |
797 | } | |
798 | } | |
799 | ||
800 | /* flush all the translation blocks */ | |
801 | /* XXX: tb_flush is currently not thread safe */ | |
802 | void tb_flush(CPUState *env1) | |
803 | { | |
804 | CPUState *env; | |
805 | #if defined(DEBUG_FLUSH) | |
806 | printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n", | |
807 | (unsigned long)(code_gen_ptr - code_gen_buffer), | |
808 | nb_tbs, nb_tbs > 0 ? | |
809 | ((unsigned long)(code_gen_ptr - code_gen_buffer)) / nb_tbs : 0); | |
810 | #endif | |
811 | if ((unsigned long)(code_gen_ptr - code_gen_buffer) > code_gen_buffer_size) | |
812 | cpu_abort(env1, "Internal error: code buffer overflow\n"); | |
813 | ||
814 | nb_tbs = 0; | |
815 | ||
816 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
817 | memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); | |
818 | } | |
819 | ||
820 | memset (tb_phys_hash, 0, CODE_GEN_PHYS_HASH_SIZE * sizeof (void *)); | |
821 | page_flush_tb(); | |
822 | ||
823 | code_gen_ptr = code_gen_buffer; | |
824 | /* XXX: flush processor icache at this point if cache flush is | |
825 | expensive */ | |
826 | tb_flush_count++; | |
827 | } | |
828 | ||
829 | #ifdef DEBUG_TB_CHECK | |
830 | ||
831 | static void tb_invalidate_check(target_ulong address) | |
832 | { | |
833 | TranslationBlock *tb; | |
834 | int i; | |
835 | address &= TARGET_PAGE_MASK; | |
836 | for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) { | |
837 | for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { | |
838 | if (!(address + TARGET_PAGE_SIZE <= tb->pc || | |
839 | address >= tb->pc + tb->size)) { | |
840 | printf("ERROR invalidate: address=" TARGET_FMT_lx | |
841 | " PC=%08lx size=%04x\n", | |
842 | address, (long)tb->pc, tb->size); | |
843 | } | |
844 | } | |
845 | } | |
846 | } | |
847 | ||
848 | /* verify that all the pages have correct rights for code */ | |
849 | static void tb_page_check(void) | |
850 | { | |
851 | TranslationBlock *tb; | |
852 | int i, flags1, flags2; | |
853 | ||
854 | for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) { | |
855 | for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { | |
856 | flags1 = page_get_flags(tb->pc); | |
857 | flags2 = page_get_flags(tb->pc + tb->size - 1); | |
858 | if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) { | |
859 | printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n", | |
860 | (long)tb->pc, tb->size, flags1, flags2); | |
861 | } | |
862 | } | |
863 | } | |
864 | } | |
865 | ||
866 | #endif | |
867 | ||
868 | /* invalidate one TB */ | |
869 | static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb, | |
870 | int next_offset) | |
871 | { | |
872 | TranslationBlock *tb1; | |
873 | for(;;) { | |
874 | tb1 = *ptb; | |
875 | if (tb1 == tb) { | |
876 | *ptb = *(TranslationBlock **)((char *)tb1 + next_offset); | |
877 | break; | |
878 | } | |
879 | ptb = (TranslationBlock **)((char *)tb1 + next_offset); | |
880 | } | |
881 | } | |
882 | ||
883 | static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) | |
884 | { | |
885 | TranslationBlock *tb1; | |
886 | unsigned int n1; | |
887 | ||
888 | for(;;) { | |
889 | tb1 = *ptb; | |
890 | n1 = (long)tb1 & 3; | |
891 | tb1 = (TranslationBlock *)((long)tb1 & ~3); | |
892 | if (tb1 == tb) { | |
893 | *ptb = tb1->page_next[n1]; | |
894 | break; | |
895 | } | |
896 | ptb = &tb1->page_next[n1]; | |
897 | } | |
898 | } | |
899 | ||
900 | static inline void tb_jmp_remove(TranslationBlock *tb, int n) | |
901 | { | |
902 | TranslationBlock *tb1, **ptb; | |
903 | unsigned int n1; | |
904 | ||
905 | ptb = &tb->jmp_next[n]; | |
906 | tb1 = *ptb; | |
907 | if (tb1) { | |
908 | /* find tb(n) in circular list */ | |
909 | for(;;) { | |
910 | tb1 = *ptb; | |
911 | n1 = (long)tb1 & 3; | |
912 | tb1 = (TranslationBlock *)((long)tb1 & ~3); | |
913 | if (n1 == n && tb1 == tb) | |
914 | break; | |
915 | if (n1 == 2) { | |
916 | ptb = &tb1->jmp_first; | |
917 | } else { | |
918 | ptb = &tb1->jmp_next[n1]; | |
919 | } | |
920 | } | |
921 | /* now we can suppress tb(n) from the list */ | |
922 | *ptb = tb->jmp_next[n]; | |
923 | ||
924 | tb->jmp_next[n] = NULL; | |
925 | } | |
926 | } | |
927 | ||
928 | /* reset the jump entry 'n' of a TB so that it is not chained to | |
929 | another TB */ | |
930 | static inline void tb_reset_jump(TranslationBlock *tb, int n) | |
931 | { | |
932 | tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); | |
933 | } | |
934 | ||
935 | void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr) | |
936 | { | |
937 | CPUState *env; | |
938 | PageDesc *p; | |
939 | unsigned int h, n1; | |
940 | tb_page_addr_t phys_pc; | |
941 | TranslationBlock *tb1, *tb2; | |
942 | ||
943 | /* remove the TB from the hash list */ | |
944 | phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK); | |
945 | h = tb_phys_hash_func(phys_pc); | |
946 | tb_remove(&tb_phys_hash[h], tb, | |
947 | offsetof(TranslationBlock, phys_hash_next)); | |
948 | ||
949 | /* remove the TB from the page list */ | |
950 | if (tb->page_addr[0] != page_addr) { | |
951 | p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS); | |
952 | tb_page_remove(&p->first_tb, tb); | |
953 | invalidate_page_bitmap(p); | |
954 | } | |
955 | if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { | |
956 | p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS); | |
957 | tb_page_remove(&p->first_tb, tb); | |
958 | invalidate_page_bitmap(p); | |
959 | } | |
960 | ||
961 | tb_invalidated_flag = 1; | |
962 | ||
963 | /* remove the TB from the hash list */ | |
964 | h = tb_jmp_cache_hash_func(tb->pc); | |
965 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
966 | if (env->tb_jmp_cache[h] == tb) | |
967 | env->tb_jmp_cache[h] = NULL; | |
968 | } | |
969 | ||
970 | /* suppress this TB from the two jump lists */ | |
971 | tb_jmp_remove(tb, 0); | |
972 | tb_jmp_remove(tb, 1); | |
973 | ||
974 | /* suppress any remaining jumps to this TB */ | |
975 | tb1 = tb->jmp_first; | |
976 | for(;;) { | |
977 | n1 = (long)tb1 & 3; | |
978 | if (n1 == 2) | |
979 | break; | |
980 | tb1 = (TranslationBlock *)((long)tb1 & ~3); | |
981 | tb2 = tb1->jmp_next[n1]; | |
982 | tb_reset_jump(tb1, n1); | |
983 | tb1->jmp_next[n1] = NULL; | |
984 | tb1 = tb2; | |
985 | } | |
986 | tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ | |
987 | ||
988 | tb_phys_invalidate_count++; | |
989 | } | |
990 | ||
991 | static inline void set_bits(uint8_t *tab, int start, int len) | |
992 | { | |
993 | int end, mask, end1; | |
994 | ||
995 | end = start + len; | |
996 | tab += start >> 3; | |
997 | mask = 0xff << (start & 7); | |
998 | if ((start & ~7) == (end & ~7)) { | |
999 | if (start < end) { | |
1000 | mask &= ~(0xff << (end & 7)); | |
1001 | *tab |= mask; | |
1002 | } | |
1003 | } else { | |
1004 | *tab++ |= mask; | |
1005 | start = (start + 8) & ~7; | |
1006 | end1 = end & ~7; | |
1007 | while (start < end1) { | |
1008 | *tab++ = 0xff; | |
1009 | start += 8; | |
1010 | } | |
1011 | if (start < end) { | |
1012 | mask = ~(0xff << (end & 7)); | |
1013 | *tab |= mask; | |
1014 | } | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | static void build_page_bitmap(PageDesc *p) | |
1019 | { | |
1020 | int n, tb_start, tb_end; | |
1021 | TranslationBlock *tb; | |
1022 | ||
1023 | p->code_bitmap = g_malloc0(TARGET_PAGE_SIZE / 8); | |
1024 | ||
1025 | tb = p->first_tb; | |
1026 | while (tb != NULL) { | |
1027 | n = (long)tb & 3; | |
1028 | tb = (TranslationBlock *)((long)tb & ~3); | |
1029 | /* NOTE: this is subtle as a TB may span two physical pages */ | |
1030 | if (n == 0) { | |
1031 | /* NOTE: tb_end may be after the end of the page, but | |
1032 | it is not a problem */ | |
1033 | tb_start = tb->pc & ~TARGET_PAGE_MASK; | |
1034 | tb_end = tb_start + tb->size; | |
1035 | if (tb_end > TARGET_PAGE_SIZE) | |
1036 | tb_end = TARGET_PAGE_SIZE; | |
1037 | } else { | |
1038 | tb_start = 0; | |
1039 | tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); | |
1040 | } | |
1041 | set_bits(p->code_bitmap, tb_start, tb_end - tb_start); | |
1042 | tb = tb->page_next[n]; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | TranslationBlock *tb_gen_code(CPUState *env, | |
1047 | target_ulong pc, target_ulong cs_base, | |
1048 | int flags, int cflags) | |
1049 | { | |
1050 | TranslationBlock *tb; | |
1051 | uint8_t *tc_ptr; | |
1052 | tb_page_addr_t phys_pc, phys_page2; | |
1053 | target_ulong virt_page2; | |
1054 | int code_gen_size; | |
1055 | ||
1056 | phys_pc = get_page_addr_code(env, pc); | |
1057 | tb = tb_alloc(pc); | |
1058 | if (!tb) { | |
1059 | /* flush must be done */ | |
1060 | tb_flush(env); | |
1061 | /* cannot fail at this point */ | |
1062 | tb = tb_alloc(pc); | |
1063 | /* Don't forget to invalidate previous TB info. */ | |
1064 | tb_invalidated_flag = 1; | |
1065 | } | |
1066 | tc_ptr = code_gen_ptr; | |
1067 | tb->tc_ptr = tc_ptr; | |
1068 | tb->cs_base = cs_base; | |
1069 | tb->flags = flags; | |
1070 | tb->cflags = cflags; | |
1071 | cpu_gen_code(env, tb, &code_gen_size); | |
1072 | code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); | |
1073 | ||
1074 | /* check next page if needed */ | |
1075 | virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK; | |
1076 | phys_page2 = -1; | |
1077 | if ((pc & TARGET_PAGE_MASK) != virt_page2) { | |
1078 | phys_page2 = get_page_addr_code(env, virt_page2); | |
1079 | } | |
1080 | tb_link_page(tb, phys_pc, phys_page2); | |
1081 | return tb; | |
1082 | } | |
1083 | ||
1084 | /* invalidate all TBs which intersect with the target physical page | |
1085 | starting in range [start;end[. NOTE: start and end must refer to | |
1086 | the same physical page. 'is_cpu_write_access' should be true if called | |
1087 | from a real cpu write access: the virtual CPU will exit the current | |
1088 | TB if code is modified inside this TB. */ | |
1089 | void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end, | |
1090 | int is_cpu_write_access) | |
1091 | { | |
1092 | TranslationBlock *tb, *tb_next, *saved_tb; | |
1093 | CPUState *env = cpu_single_env; | |
1094 | tb_page_addr_t tb_start, tb_end; | |
1095 | PageDesc *p; | |
1096 | int n; | |
1097 | #ifdef TARGET_HAS_PRECISE_SMC | |
1098 | int current_tb_not_found = is_cpu_write_access; | |
1099 | TranslationBlock *current_tb = NULL; | |
1100 | int current_tb_modified = 0; | |
1101 | target_ulong current_pc = 0; | |
1102 | target_ulong current_cs_base = 0; | |
1103 | int current_flags = 0; | |
1104 | #endif /* TARGET_HAS_PRECISE_SMC */ | |
1105 | ||
1106 | p = page_find(start >> TARGET_PAGE_BITS); | |
1107 | if (!p) | |
1108 | return; | |
1109 | if (!p->code_bitmap && | |
1110 | ++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD && | |
1111 | is_cpu_write_access) { | |
1112 | /* build code bitmap */ | |
1113 | build_page_bitmap(p); | |
1114 | } | |
1115 | ||
1116 | /* we remove all the TBs in the range [start, end[ */ | |
1117 | /* XXX: see if in some cases it could be faster to invalidate all the code */ | |
1118 | tb = p->first_tb; | |
1119 | while (tb != NULL) { | |
1120 | n = (long)tb & 3; | |
1121 | tb = (TranslationBlock *)((long)tb & ~3); | |
1122 | tb_next = tb->page_next[n]; | |
1123 | /* NOTE: this is subtle as a TB may span two physical pages */ | |
1124 | if (n == 0) { | |
1125 | /* NOTE: tb_end may be after the end of the page, but | |
1126 | it is not a problem */ | |
1127 | tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK); | |
1128 | tb_end = tb_start + tb->size; | |
1129 | } else { | |
1130 | tb_start = tb->page_addr[1]; | |
1131 | tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); | |
1132 | } | |
1133 | if (!(tb_end <= start || tb_start >= end)) { | |
1134 | #ifdef TARGET_HAS_PRECISE_SMC | |
1135 | if (current_tb_not_found) { | |
1136 | current_tb_not_found = 0; | |
1137 | current_tb = NULL; | |
1138 | if (env->mem_io_pc) { | |
1139 | /* now we have a real cpu fault */ | |
1140 | current_tb = tb_find_pc(env->mem_io_pc); | |
1141 | } | |
1142 | } | |
1143 | if (current_tb == tb && | |
1144 | (current_tb->cflags & CF_COUNT_MASK) != 1) { | |
1145 | /* If we are modifying the current TB, we must stop | |
1146 | its execution. We could be more precise by checking | |
1147 | that the modification is after the current PC, but it | |
1148 | would require a specialized function to partially | |
1149 | restore the CPU state */ | |
1150 | ||
1151 | current_tb_modified = 1; | |
1152 | cpu_restore_state(current_tb, env, env->mem_io_pc); | |
1153 | cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, | |
1154 | ¤t_flags); | |
1155 | } | |
1156 | #endif /* TARGET_HAS_PRECISE_SMC */ | |
1157 | /* we need to do that to handle the case where a signal | |
1158 | occurs while doing tb_phys_invalidate() */ | |
1159 | saved_tb = NULL; | |
1160 | if (env) { | |
1161 | saved_tb = env->current_tb; | |
1162 | env->current_tb = NULL; | |
1163 | } | |
1164 | tb_phys_invalidate(tb, -1); | |
1165 | if (env) { | |
1166 | env->current_tb = saved_tb; | |
1167 | if (env->interrupt_request && env->current_tb) | |
1168 | cpu_interrupt(env, env->interrupt_request); | |
1169 | } | |
1170 | } | |
1171 | tb = tb_next; | |
1172 | } | |
1173 | #if !defined(CONFIG_USER_ONLY) | |
1174 | /* if no code remaining, no need to continue to use slow writes */ | |
1175 | if (!p->first_tb) { | |
1176 | invalidate_page_bitmap(p); | |
1177 | if (is_cpu_write_access) { | |
1178 | tlb_unprotect_code_phys(env, start, env->mem_io_vaddr); | |
1179 | } | |
1180 | } | |
1181 | #endif | |
1182 | #ifdef TARGET_HAS_PRECISE_SMC | |
1183 | if (current_tb_modified) { | |
1184 | /* we generate a block containing just the instruction | |
1185 | modifying the memory. It will ensure that it cannot modify | |
1186 | itself */ | |
1187 | env->current_tb = NULL; | |
1188 | tb_gen_code(env, current_pc, current_cs_base, current_flags, 1); | |
1189 | cpu_resume_from_signal(env, NULL); | |
1190 | } | |
1191 | #endif | |
1192 | } | |
1193 | ||
1194 | /* len must be <= 8 and start must be a multiple of len */ | |
1195 | static inline void tb_invalidate_phys_page_fast(tb_page_addr_t start, int len) | |
1196 | { | |
1197 | PageDesc *p; | |
1198 | int offset, b; | |
1199 | #if 0 | |
1200 | if (1) { | |
1201 | qemu_log("modifying code at 0x%x size=%d EIP=%x PC=%08x\n", | |
1202 | cpu_single_env->mem_io_vaddr, len, | |
1203 | cpu_single_env->eip, | |
1204 | cpu_single_env->eip + (long)cpu_single_env->segs[R_CS].base); | |
1205 | } | |
1206 | #endif | |
1207 | p = page_find(start >> TARGET_PAGE_BITS); | |
1208 | if (!p) | |
1209 | return; | |
1210 | if (p->code_bitmap) { | |
1211 | offset = start & ~TARGET_PAGE_MASK; | |
1212 | b = p->code_bitmap[offset >> 3] >> (offset & 7); | |
1213 | if (b & ((1 << len) - 1)) | |
1214 | goto do_invalidate; | |
1215 | } else { | |
1216 | do_invalidate: | |
1217 | tb_invalidate_phys_page_range(start, start + len, 1); | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | #if !defined(CONFIG_SOFTMMU) | |
1222 | static void tb_invalidate_phys_page(tb_page_addr_t addr, | |
1223 | unsigned long pc, void *puc) | |
1224 | { | |
1225 | TranslationBlock *tb; | |
1226 | PageDesc *p; | |
1227 | int n; | |
1228 | #ifdef TARGET_HAS_PRECISE_SMC | |
1229 | TranslationBlock *current_tb = NULL; | |
1230 | CPUState *env = cpu_single_env; | |
1231 | int current_tb_modified = 0; | |
1232 | target_ulong current_pc = 0; | |
1233 | target_ulong current_cs_base = 0; | |
1234 | int current_flags = 0; | |
1235 | #endif | |
1236 | ||
1237 | addr &= TARGET_PAGE_MASK; | |
1238 | p = page_find(addr >> TARGET_PAGE_BITS); | |
1239 | if (!p) | |
1240 | return; | |
1241 | tb = p->first_tb; | |
1242 | #ifdef TARGET_HAS_PRECISE_SMC | |
1243 | if (tb && pc != 0) { | |
1244 | current_tb = tb_find_pc(pc); | |
1245 | } | |
1246 | #endif | |
1247 | while (tb != NULL) { | |
1248 | n = (long)tb & 3; | |
1249 | tb = (TranslationBlock *)((long)tb & ~3); | |
1250 | #ifdef TARGET_HAS_PRECISE_SMC | |
1251 | if (current_tb == tb && | |
1252 | (current_tb->cflags & CF_COUNT_MASK) != 1) { | |
1253 | /* If we are modifying the current TB, we must stop | |
1254 | its execution. We could be more precise by checking | |
1255 | that the modification is after the current PC, but it | |
1256 | would require a specialized function to partially | |
1257 | restore the CPU state */ | |
1258 | ||
1259 | current_tb_modified = 1; | |
1260 | cpu_restore_state(current_tb, env, pc); | |
1261 | cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, | |
1262 | ¤t_flags); | |
1263 | } | |
1264 | #endif /* TARGET_HAS_PRECISE_SMC */ | |
1265 | tb_phys_invalidate(tb, addr); | |
1266 | tb = tb->page_next[n]; | |
1267 | } | |
1268 | p->first_tb = NULL; | |
1269 | #ifdef TARGET_HAS_PRECISE_SMC | |
1270 | if (current_tb_modified) { | |
1271 | /* we generate a block containing just the instruction | |
1272 | modifying the memory. It will ensure that it cannot modify | |
1273 | itself */ | |
1274 | env->current_tb = NULL; | |
1275 | tb_gen_code(env, current_pc, current_cs_base, current_flags, 1); | |
1276 | cpu_resume_from_signal(env, puc); | |
1277 | } | |
1278 | #endif | |
1279 | } | |
1280 | #endif | |
1281 | ||
1282 | /* add the tb in the target page and protect it if necessary */ | |
1283 | static inline void tb_alloc_page(TranslationBlock *tb, | |
1284 | unsigned int n, tb_page_addr_t page_addr) | |
1285 | { | |
1286 | PageDesc *p; | |
1287 | #ifndef CONFIG_USER_ONLY | |
1288 | bool page_already_protected; | |
1289 | #endif | |
1290 | ||
1291 | tb->page_addr[n] = page_addr; | |
1292 | p = page_find_alloc(page_addr >> TARGET_PAGE_BITS, 1); | |
1293 | tb->page_next[n] = p->first_tb; | |
1294 | #ifndef CONFIG_USER_ONLY | |
1295 | page_already_protected = p->first_tb != NULL; | |
1296 | #endif | |
1297 | p->first_tb = (TranslationBlock *)((long)tb | n); | |
1298 | invalidate_page_bitmap(p); | |
1299 | ||
1300 | #if defined(TARGET_HAS_SMC) || 1 | |
1301 | ||
1302 | #if defined(CONFIG_USER_ONLY) | |
1303 | if (p->flags & PAGE_WRITE) { | |
1304 | target_ulong addr; | |
1305 | PageDesc *p2; | |
1306 | int prot; | |
1307 | ||
1308 | /* force the host page as non writable (writes will have a | |
1309 | page fault + mprotect overhead) */ | |
1310 | page_addr &= qemu_host_page_mask; | |
1311 | prot = 0; | |
1312 | for(addr = page_addr; addr < page_addr + qemu_host_page_size; | |
1313 | addr += TARGET_PAGE_SIZE) { | |
1314 | ||
1315 | p2 = page_find (addr >> TARGET_PAGE_BITS); | |
1316 | if (!p2) | |
1317 | continue; | |
1318 | prot |= p2->flags; | |
1319 | p2->flags &= ~PAGE_WRITE; | |
1320 | } | |
1321 | mprotect(g2h(page_addr), qemu_host_page_size, | |
1322 | (prot & PAGE_BITS) & ~PAGE_WRITE); | |
1323 | #ifdef DEBUG_TB_INVALIDATE | |
1324 | printf("protecting code page: 0x" TARGET_FMT_lx "\n", | |
1325 | page_addr); | |
1326 | #endif | |
1327 | } | |
1328 | #else | |
1329 | /* if some code is already present, then the pages are already | |
1330 | protected. So we handle the case where only the first TB is | |
1331 | allocated in a physical page */ | |
1332 | if (!page_already_protected) { | |
1333 | tlb_protect_code(page_addr); | |
1334 | } | |
1335 | #endif | |
1336 | ||
1337 | #endif /* TARGET_HAS_SMC */ | |
1338 | } | |
1339 | ||
1340 | /* add a new TB and link it to the physical page tables. phys_page2 is | |
1341 | (-1) to indicate that only one page contains the TB. */ | |
1342 | void tb_link_page(TranslationBlock *tb, | |
1343 | tb_page_addr_t phys_pc, tb_page_addr_t phys_page2) | |
1344 | { | |
1345 | unsigned int h; | |
1346 | TranslationBlock **ptb; | |
1347 | ||
1348 | /* Grab the mmap lock to stop another thread invalidating this TB | |
1349 | before we are done. */ | |
1350 | mmap_lock(); | |
1351 | /* add in the physical hash table */ | |
1352 | h = tb_phys_hash_func(phys_pc); | |
1353 | ptb = &tb_phys_hash[h]; | |
1354 | tb->phys_hash_next = *ptb; | |
1355 | *ptb = tb; | |
1356 | ||
1357 | /* add in the page list */ | |
1358 | tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK); | |
1359 | if (phys_page2 != -1) | |
1360 | tb_alloc_page(tb, 1, phys_page2); | |
1361 | else | |
1362 | tb->page_addr[1] = -1; | |
1363 | ||
1364 | tb->jmp_first = (TranslationBlock *)((long)tb | 2); | |
1365 | tb->jmp_next[0] = NULL; | |
1366 | tb->jmp_next[1] = NULL; | |
1367 | ||
1368 | /* init original jump addresses */ | |
1369 | if (tb->tb_next_offset[0] != 0xffff) | |
1370 | tb_reset_jump(tb, 0); | |
1371 | if (tb->tb_next_offset[1] != 0xffff) | |
1372 | tb_reset_jump(tb, 1); | |
1373 | ||
1374 | #ifdef DEBUG_TB_CHECK | |
1375 | tb_page_check(); | |
1376 | #endif | |
1377 | mmap_unlock(); | |
1378 | } | |
1379 | ||
1380 | /* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr < | |
1381 | tb[1].tc_ptr. Return NULL if not found */ | |
1382 | TranslationBlock *tb_find_pc(unsigned long tc_ptr) | |
1383 | { | |
1384 | int m_min, m_max, m; | |
1385 | unsigned long v; | |
1386 | TranslationBlock *tb; | |
1387 | ||
1388 | if (nb_tbs <= 0) | |
1389 | return NULL; | |
1390 | if (tc_ptr < (unsigned long)code_gen_buffer || | |
1391 | tc_ptr >= (unsigned long)code_gen_ptr) | |
1392 | return NULL; | |
1393 | /* binary search (cf Knuth) */ | |
1394 | m_min = 0; | |
1395 | m_max = nb_tbs - 1; | |
1396 | while (m_min <= m_max) { | |
1397 | m = (m_min + m_max) >> 1; | |
1398 | tb = &tbs[m]; | |
1399 | v = (unsigned long)tb->tc_ptr; | |
1400 | if (v == tc_ptr) | |
1401 | return tb; | |
1402 | else if (tc_ptr < v) { | |
1403 | m_max = m - 1; | |
1404 | } else { | |
1405 | m_min = m + 1; | |
1406 | } | |
1407 | } | |
1408 | return &tbs[m_max]; | |
1409 | } | |
1410 | ||
1411 | static void tb_reset_jump_recursive(TranslationBlock *tb); | |
1412 | ||
1413 | static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) | |
1414 | { | |
1415 | TranslationBlock *tb1, *tb_next, **ptb; | |
1416 | unsigned int n1; | |
1417 | ||
1418 | tb1 = tb->jmp_next[n]; | |
1419 | if (tb1 != NULL) { | |
1420 | /* find head of list */ | |
1421 | for(;;) { | |
1422 | n1 = (long)tb1 & 3; | |
1423 | tb1 = (TranslationBlock *)((long)tb1 & ~3); | |
1424 | if (n1 == 2) | |
1425 | break; | |
1426 | tb1 = tb1->jmp_next[n1]; | |
1427 | } | |
1428 | /* we are now sure now that tb jumps to tb1 */ | |
1429 | tb_next = tb1; | |
1430 | ||
1431 | /* remove tb from the jmp_first list */ | |
1432 | ptb = &tb_next->jmp_first; | |
1433 | for(;;) { | |
1434 | tb1 = *ptb; | |
1435 | n1 = (long)tb1 & 3; | |
1436 | tb1 = (TranslationBlock *)((long)tb1 & ~3); | |
1437 | if (n1 == n && tb1 == tb) | |
1438 | break; | |
1439 | ptb = &tb1->jmp_next[n1]; | |
1440 | } | |
1441 | *ptb = tb->jmp_next[n]; | |
1442 | tb->jmp_next[n] = NULL; | |
1443 | ||
1444 | /* suppress the jump to next tb in generated code */ | |
1445 | tb_reset_jump(tb, n); | |
1446 | ||
1447 | /* suppress jumps in the tb on which we could have jumped */ | |
1448 | tb_reset_jump_recursive(tb_next); | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | static void tb_reset_jump_recursive(TranslationBlock *tb) | |
1453 | { | |
1454 | tb_reset_jump_recursive2(tb, 0); | |
1455 | tb_reset_jump_recursive2(tb, 1); | |
1456 | } | |
1457 | ||
1458 | #if defined(TARGET_HAS_ICE) | |
1459 | #if defined(CONFIG_USER_ONLY) | |
1460 | static void breakpoint_invalidate(CPUState *env, target_ulong pc) | |
1461 | { | |
1462 | tb_invalidate_phys_page_range(pc, pc + 1, 0); | |
1463 | } | |
1464 | #else | |
1465 | static void breakpoint_invalidate(CPUState *env, target_ulong pc) | |
1466 | { | |
1467 | target_phys_addr_t addr; | |
1468 | ram_addr_t ram_addr; | |
1469 | MemoryRegionSection *section; | |
1470 | ||
1471 | addr = cpu_get_phys_page_debug(env, pc); | |
1472 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
1473 | if (!(memory_region_is_ram(section->mr) | |
1474 | || (section->mr->rom_device && section->mr->readable))) { | |
1475 | return; | |
1476 | } | |
1477 | ram_addr = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) | |
1478 | + section_addr(section, addr); | |
1479 | tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0); | |
1480 | } | |
1481 | #endif | |
1482 | #endif /* TARGET_HAS_ICE */ | |
1483 | ||
1484 | #if defined(CONFIG_USER_ONLY) | |
1485 | void cpu_watchpoint_remove_all(CPUState *env, int mask) | |
1486 | ||
1487 | { | |
1488 | } | |
1489 | ||
1490 | int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len, | |
1491 | int flags, CPUWatchpoint **watchpoint) | |
1492 | { | |
1493 | return -ENOSYS; | |
1494 | } | |
1495 | #else | |
1496 | /* Add a watchpoint. */ | |
1497 | int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len, | |
1498 | int flags, CPUWatchpoint **watchpoint) | |
1499 | { | |
1500 | target_ulong len_mask = ~(len - 1); | |
1501 | CPUWatchpoint *wp; | |
1502 | ||
1503 | /* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */ | |
1504 | if ((len & (len - 1)) || (addr & ~len_mask) || | |
1505 | len == 0 || len > TARGET_PAGE_SIZE) { | |
1506 | fprintf(stderr, "qemu: tried to set invalid watchpoint at " | |
1507 | TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len); | |
1508 | return -EINVAL; | |
1509 | } | |
1510 | wp = g_malloc(sizeof(*wp)); | |
1511 | ||
1512 | wp->vaddr = addr; | |
1513 | wp->len_mask = len_mask; | |
1514 | wp->flags = flags; | |
1515 | ||
1516 | /* keep all GDB-injected watchpoints in front */ | |
1517 | if (flags & BP_GDB) | |
1518 | QTAILQ_INSERT_HEAD(&env->watchpoints, wp, entry); | |
1519 | else | |
1520 | QTAILQ_INSERT_TAIL(&env->watchpoints, wp, entry); | |
1521 | ||
1522 | tlb_flush_page(env, addr); | |
1523 | ||
1524 | if (watchpoint) | |
1525 | *watchpoint = wp; | |
1526 | return 0; | |
1527 | } | |
1528 | ||
1529 | /* Remove a specific watchpoint. */ | |
1530 | int cpu_watchpoint_remove(CPUState *env, target_ulong addr, target_ulong len, | |
1531 | int flags) | |
1532 | { | |
1533 | target_ulong len_mask = ~(len - 1); | |
1534 | CPUWatchpoint *wp; | |
1535 | ||
1536 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
1537 | if (addr == wp->vaddr && len_mask == wp->len_mask | |
1538 | && flags == (wp->flags & ~BP_WATCHPOINT_HIT)) { | |
1539 | cpu_watchpoint_remove_by_ref(env, wp); | |
1540 | return 0; | |
1541 | } | |
1542 | } | |
1543 | return -ENOENT; | |
1544 | } | |
1545 | ||
1546 | /* Remove a specific watchpoint by reference. */ | |
1547 | void cpu_watchpoint_remove_by_ref(CPUState *env, CPUWatchpoint *watchpoint) | |
1548 | { | |
1549 | QTAILQ_REMOVE(&env->watchpoints, watchpoint, entry); | |
1550 | ||
1551 | tlb_flush_page(env, watchpoint->vaddr); | |
1552 | ||
1553 | g_free(watchpoint); | |
1554 | } | |
1555 | ||
1556 | /* Remove all matching watchpoints. */ | |
1557 | void cpu_watchpoint_remove_all(CPUState *env, int mask) | |
1558 | { | |
1559 | CPUWatchpoint *wp, *next; | |
1560 | ||
1561 | QTAILQ_FOREACH_SAFE(wp, &env->watchpoints, entry, next) { | |
1562 | if (wp->flags & mask) | |
1563 | cpu_watchpoint_remove_by_ref(env, wp); | |
1564 | } | |
1565 | } | |
1566 | #endif | |
1567 | ||
1568 | /* Add a breakpoint. */ | |
1569 | int cpu_breakpoint_insert(CPUState *env, target_ulong pc, int flags, | |
1570 | CPUBreakpoint **breakpoint) | |
1571 | { | |
1572 | #if defined(TARGET_HAS_ICE) | |
1573 | CPUBreakpoint *bp; | |
1574 | ||
1575 | bp = g_malloc(sizeof(*bp)); | |
1576 | ||
1577 | bp->pc = pc; | |
1578 | bp->flags = flags; | |
1579 | ||
1580 | /* keep all GDB-injected breakpoints in front */ | |
1581 | if (flags & BP_GDB) | |
1582 | QTAILQ_INSERT_HEAD(&env->breakpoints, bp, entry); | |
1583 | else | |
1584 | QTAILQ_INSERT_TAIL(&env->breakpoints, bp, entry); | |
1585 | ||
1586 | breakpoint_invalidate(env, pc); | |
1587 | ||
1588 | if (breakpoint) | |
1589 | *breakpoint = bp; | |
1590 | return 0; | |
1591 | #else | |
1592 | return -ENOSYS; | |
1593 | #endif | |
1594 | } | |
1595 | ||
1596 | /* Remove a specific breakpoint. */ | |
1597 | int cpu_breakpoint_remove(CPUState *env, target_ulong pc, int flags) | |
1598 | { | |
1599 | #if defined(TARGET_HAS_ICE) | |
1600 | CPUBreakpoint *bp; | |
1601 | ||
1602 | QTAILQ_FOREACH(bp, &env->breakpoints, entry) { | |
1603 | if (bp->pc == pc && bp->flags == flags) { | |
1604 | cpu_breakpoint_remove_by_ref(env, bp); | |
1605 | return 0; | |
1606 | } | |
1607 | } | |
1608 | return -ENOENT; | |
1609 | #else | |
1610 | return -ENOSYS; | |
1611 | #endif | |
1612 | } | |
1613 | ||
1614 | /* Remove a specific breakpoint by reference. */ | |
1615 | void cpu_breakpoint_remove_by_ref(CPUState *env, CPUBreakpoint *breakpoint) | |
1616 | { | |
1617 | #if defined(TARGET_HAS_ICE) | |
1618 | QTAILQ_REMOVE(&env->breakpoints, breakpoint, entry); | |
1619 | ||
1620 | breakpoint_invalidate(env, breakpoint->pc); | |
1621 | ||
1622 | g_free(breakpoint); | |
1623 | #endif | |
1624 | } | |
1625 | ||
1626 | /* Remove all matching breakpoints. */ | |
1627 | void cpu_breakpoint_remove_all(CPUState *env, int mask) | |
1628 | { | |
1629 | #if defined(TARGET_HAS_ICE) | |
1630 | CPUBreakpoint *bp, *next; | |
1631 | ||
1632 | QTAILQ_FOREACH_SAFE(bp, &env->breakpoints, entry, next) { | |
1633 | if (bp->flags & mask) | |
1634 | cpu_breakpoint_remove_by_ref(env, bp); | |
1635 | } | |
1636 | #endif | |
1637 | } | |
1638 | ||
1639 | /* enable or disable single step mode. EXCP_DEBUG is returned by the | |
1640 | CPU loop after each instruction */ | |
1641 | void cpu_single_step(CPUState *env, int enabled) | |
1642 | { | |
1643 | #if defined(TARGET_HAS_ICE) | |
1644 | if (env->singlestep_enabled != enabled) { | |
1645 | env->singlestep_enabled = enabled; | |
1646 | if (kvm_enabled()) | |
1647 | kvm_update_guest_debug(env, 0); | |
1648 | else { | |
1649 | /* must flush all the translated code to avoid inconsistencies */ | |
1650 | /* XXX: only flush what is necessary */ | |
1651 | tb_flush(env); | |
1652 | } | |
1653 | } | |
1654 | #endif | |
1655 | } | |
1656 | ||
1657 | /* enable or disable low levels log */ | |
1658 | void cpu_set_log(int log_flags) | |
1659 | { | |
1660 | loglevel = log_flags; | |
1661 | if (loglevel && !logfile) { | |
1662 | logfile = fopen(logfilename, log_append ? "a" : "w"); | |
1663 | if (!logfile) { | |
1664 | perror(logfilename); | |
1665 | _exit(1); | |
1666 | } | |
1667 | #if !defined(CONFIG_SOFTMMU) | |
1668 | /* must avoid mmap() usage of glibc by setting a buffer "by hand" */ | |
1669 | { | |
1670 | static char logfile_buf[4096]; | |
1671 | setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf)); | |
1672 | } | |
1673 | #elif defined(_WIN32) | |
1674 | /* Win32 doesn't support line-buffering, so use unbuffered output. */ | |
1675 | setvbuf(logfile, NULL, _IONBF, 0); | |
1676 | #else | |
1677 | setvbuf(logfile, NULL, _IOLBF, 0); | |
1678 | #endif | |
1679 | log_append = 1; | |
1680 | } | |
1681 | if (!loglevel && logfile) { | |
1682 | fclose(logfile); | |
1683 | logfile = NULL; | |
1684 | } | |
1685 | } | |
1686 | ||
1687 | void cpu_set_log_filename(const char *filename) | |
1688 | { | |
1689 | logfilename = strdup(filename); | |
1690 | if (logfile) { | |
1691 | fclose(logfile); | |
1692 | logfile = NULL; | |
1693 | } | |
1694 | cpu_set_log(loglevel); | |
1695 | } | |
1696 | ||
1697 | static void cpu_unlink_tb(CPUState *env) | |
1698 | { | |
1699 | /* FIXME: TB unchaining isn't SMP safe. For now just ignore the | |
1700 | problem and hope the cpu will stop of its own accord. For userspace | |
1701 | emulation this often isn't actually as bad as it sounds. Often | |
1702 | signals are used primarily to interrupt blocking syscalls. */ | |
1703 | TranslationBlock *tb; | |
1704 | static spinlock_t interrupt_lock = SPIN_LOCK_UNLOCKED; | |
1705 | ||
1706 | spin_lock(&interrupt_lock); | |
1707 | tb = env->current_tb; | |
1708 | /* if the cpu is currently executing code, we must unlink it and | |
1709 | all the potentially executing TB */ | |
1710 | if (tb) { | |
1711 | env->current_tb = NULL; | |
1712 | tb_reset_jump_recursive(tb); | |
1713 | } | |
1714 | spin_unlock(&interrupt_lock); | |
1715 | } | |
1716 | ||
1717 | #ifndef CONFIG_USER_ONLY | |
1718 | /* mask must never be zero, except for A20 change call */ | |
1719 | static void tcg_handle_interrupt(CPUState *env, int mask) | |
1720 | { | |
1721 | int old_mask; | |
1722 | ||
1723 | old_mask = env->interrupt_request; | |
1724 | env->interrupt_request |= mask; | |
1725 | ||
1726 | /* | |
1727 | * If called from iothread context, wake the target cpu in | |
1728 | * case its halted. | |
1729 | */ | |
1730 | if (!qemu_cpu_is_self(env)) { | |
1731 | qemu_cpu_kick(env); | |
1732 | return; | |
1733 | } | |
1734 | ||
1735 | if (use_icount) { | |
1736 | env->icount_decr.u16.high = 0xffff; | |
1737 | if (!can_do_io(env) | |
1738 | && (mask & ~old_mask) != 0) { | |
1739 | cpu_abort(env, "Raised interrupt while not in I/O function"); | |
1740 | } | |
1741 | } else { | |
1742 | cpu_unlink_tb(env); | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt; | |
1747 | ||
1748 | #else /* CONFIG_USER_ONLY */ | |
1749 | ||
1750 | void cpu_interrupt(CPUState *env, int mask) | |
1751 | { | |
1752 | env->interrupt_request |= mask; | |
1753 | cpu_unlink_tb(env); | |
1754 | } | |
1755 | #endif /* CONFIG_USER_ONLY */ | |
1756 | ||
1757 | void cpu_reset_interrupt(CPUState *env, int mask) | |
1758 | { | |
1759 | env->interrupt_request &= ~mask; | |
1760 | } | |
1761 | ||
1762 | void cpu_exit(CPUState *env) | |
1763 | { | |
1764 | env->exit_request = 1; | |
1765 | cpu_unlink_tb(env); | |
1766 | } | |
1767 | ||
1768 | const CPULogItem cpu_log_items[] = { | |
1769 | { CPU_LOG_TB_OUT_ASM, "out_asm", | |
1770 | "show generated host assembly code for each compiled TB" }, | |
1771 | { CPU_LOG_TB_IN_ASM, "in_asm", | |
1772 | "show target assembly code for each compiled TB" }, | |
1773 | { CPU_LOG_TB_OP, "op", | |
1774 | "show micro ops for each compiled TB" }, | |
1775 | { CPU_LOG_TB_OP_OPT, "op_opt", | |
1776 | "show micro ops " | |
1777 | #ifdef TARGET_I386 | |
1778 | "before eflags optimization and " | |
1779 | #endif | |
1780 | "after liveness analysis" }, | |
1781 | { CPU_LOG_INT, "int", | |
1782 | "show interrupts/exceptions in short format" }, | |
1783 | { CPU_LOG_EXEC, "exec", | |
1784 | "show trace before each executed TB (lots of logs)" }, | |
1785 | { CPU_LOG_TB_CPU, "cpu", | |
1786 | "show CPU state before block translation" }, | |
1787 | #ifdef TARGET_I386 | |
1788 | { CPU_LOG_PCALL, "pcall", | |
1789 | "show protected mode far calls/returns/exceptions" }, | |
1790 | { CPU_LOG_RESET, "cpu_reset", | |
1791 | "show CPU state before CPU resets" }, | |
1792 | #endif | |
1793 | #ifdef DEBUG_IOPORT | |
1794 | { CPU_LOG_IOPORT, "ioport", | |
1795 | "show all i/o ports accesses" }, | |
1796 | #endif | |
1797 | { 0, NULL, NULL }, | |
1798 | }; | |
1799 | ||
1800 | static int cmp1(const char *s1, int n, const char *s2) | |
1801 | { | |
1802 | if (strlen(s2) != n) | |
1803 | return 0; | |
1804 | return memcmp(s1, s2, n) == 0; | |
1805 | } | |
1806 | ||
1807 | /* takes a comma separated list of log masks. Return 0 if error. */ | |
1808 | int cpu_str_to_log_mask(const char *str) | |
1809 | { | |
1810 | const CPULogItem *item; | |
1811 | int mask; | |
1812 | const char *p, *p1; | |
1813 | ||
1814 | p = str; | |
1815 | mask = 0; | |
1816 | for(;;) { | |
1817 | p1 = strchr(p, ','); | |
1818 | if (!p1) | |
1819 | p1 = p + strlen(p); | |
1820 | if(cmp1(p,p1-p,"all")) { | |
1821 | for(item = cpu_log_items; item->mask != 0; item++) { | |
1822 | mask |= item->mask; | |
1823 | } | |
1824 | } else { | |
1825 | for(item = cpu_log_items; item->mask != 0; item++) { | |
1826 | if (cmp1(p, p1 - p, item->name)) | |
1827 | goto found; | |
1828 | } | |
1829 | return 0; | |
1830 | } | |
1831 | found: | |
1832 | mask |= item->mask; | |
1833 | if (*p1 != ',') | |
1834 | break; | |
1835 | p = p1 + 1; | |
1836 | } | |
1837 | return mask; | |
1838 | } | |
1839 | ||
1840 | void cpu_abort(CPUState *env, const char *fmt, ...) | |
1841 | { | |
1842 | va_list ap; | |
1843 | va_list ap2; | |
1844 | ||
1845 | va_start(ap, fmt); | |
1846 | va_copy(ap2, ap); | |
1847 | fprintf(stderr, "qemu: fatal: "); | |
1848 | vfprintf(stderr, fmt, ap); | |
1849 | fprintf(stderr, "\n"); | |
1850 | #ifdef TARGET_I386 | |
1851 | cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP); | |
1852 | #else | |
1853 | cpu_dump_state(env, stderr, fprintf, 0); | |
1854 | #endif | |
1855 | if (qemu_log_enabled()) { | |
1856 | qemu_log("qemu: fatal: "); | |
1857 | qemu_log_vprintf(fmt, ap2); | |
1858 | qemu_log("\n"); | |
1859 | #ifdef TARGET_I386 | |
1860 | log_cpu_state(env, X86_DUMP_FPU | X86_DUMP_CCOP); | |
1861 | #else | |
1862 | log_cpu_state(env, 0); | |
1863 | #endif | |
1864 | qemu_log_flush(); | |
1865 | qemu_log_close(); | |
1866 | } | |
1867 | va_end(ap2); | |
1868 | va_end(ap); | |
1869 | #if defined(CONFIG_USER_ONLY) | |
1870 | { | |
1871 | struct sigaction act; | |
1872 | sigfillset(&act.sa_mask); | |
1873 | act.sa_handler = SIG_DFL; | |
1874 | sigaction(SIGABRT, &act, NULL); | |
1875 | } | |
1876 | #endif | |
1877 | abort(); | |
1878 | } | |
1879 | ||
1880 | CPUState *cpu_copy(CPUState *env) | |
1881 | { | |
1882 | CPUState *new_env = cpu_init(env->cpu_model_str); | |
1883 | CPUState *next_cpu = new_env->next_cpu; | |
1884 | int cpu_index = new_env->cpu_index; | |
1885 | #if defined(TARGET_HAS_ICE) | |
1886 | CPUBreakpoint *bp; | |
1887 | CPUWatchpoint *wp; | |
1888 | #endif | |
1889 | ||
1890 | memcpy(new_env, env, sizeof(CPUState)); | |
1891 | ||
1892 | /* Preserve chaining and index. */ | |
1893 | new_env->next_cpu = next_cpu; | |
1894 | new_env->cpu_index = cpu_index; | |
1895 | ||
1896 | /* Clone all break/watchpoints. | |
1897 | Note: Once we support ptrace with hw-debug register access, make sure | |
1898 | BP_CPU break/watchpoints are handled correctly on clone. */ | |
1899 | QTAILQ_INIT(&env->breakpoints); | |
1900 | QTAILQ_INIT(&env->watchpoints); | |
1901 | #if defined(TARGET_HAS_ICE) | |
1902 | QTAILQ_FOREACH(bp, &env->breakpoints, entry) { | |
1903 | cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL); | |
1904 | } | |
1905 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
1906 | cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1, | |
1907 | wp->flags, NULL); | |
1908 | } | |
1909 | #endif | |
1910 | ||
1911 | return new_env; | |
1912 | } | |
1913 | ||
1914 | #if !defined(CONFIG_USER_ONLY) | |
1915 | ||
1916 | static inline void tlb_flush_jmp_cache(CPUState *env, target_ulong addr) | |
1917 | { | |
1918 | unsigned int i; | |
1919 | ||
1920 | /* Discard jump cache entries for any tb which might potentially | |
1921 | overlap the flushed page. */ | |
1922 | i = tb_jmp_cache_hash_page(addr - TARGET_PAGE_SIZE); | |
1923 | memset (&env->tb_jmp_cache[i], 0, | |
1924 | TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *)); | |
1925 | ||
1926 | i = tb_jmp_cache_hash_page(addr); | |
1927 | memset (&env->tb_jmp_cache[i], 0, | |
1928 | TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *)); | |
1929 | } | |
1930 | ||
1931 | static CPUTLBEntry s_cputlb_empty_entry = { | |
1932 | .addr_read = -1, | |
1933 | .addr_write = -1, | |
1934 | .addr_code = -1, | |
1935 | .addend = -1, | |
1936 | }; | |
1937 | ||
1938 | /* NOTE: | |
1939 | * If flush_global is true (the usual case), flush all tlb entries. | |
1940 | * If flush_global is false, flush (at least) all tlb entries not | |
1941 | * marked global. | |
1942 | * | |
1943 | * Since QEMU doesn't currently implement a global/not-global flag | |
1944 | * for tlb entries, at the moment tlb_flush() will also flush all | |
1945 | * tlb entries in the flush_global == false case. This is OK because | |
1946 | * CPU architectures generally permit an implementation to drop | |
1947 | * entries from the TLB at any time, so flushing more entries than | |
1948 | * required is only an efficiency issue, not a correctness issue. | |
1949 | */ | |
1950 | void tlb_flush(CPUState *env, int flush_global) | |
1951 | { | |
1952 | int i; | |
1953 | ||
1954 | #if defined(DEBUG_TLB) | |
1955 | printf("tlb_flush:\n"); | |
1956 | #endif | |
1957 | /* must reset current TB so that interrupts cannot modify the | |
1958 | links while we are modifying them */ | |
1959 | env->current_tb = NULL; | |
1960 | ||
1961 | for(i = 0; i < CPU_TLB_SIZE; i++) { | |
1962 | int mmu_idx; | |
1963 | for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { | |
1964 | env->tlb_table[mmu_idx][i] = s_cputlb_empty_entry; | |
1965 | } | |
1966 | } | |
1967 | ||
1968 | memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); | |
1969 | ||
1970 | env->tlb_flush_addr = -1; | |
1971 | env->tlb_flush_mask = 0; | |
1972 | tlb_flush_count++; | |
1973 | } | |
1974 | ||
1975 | static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr) | |
1976 | { | |
1977 | if (addr == (tlb_entry->addr_read & | |
1978 | (TARGET_PAGE_MASK | TLB_INVALID_MASK)) || | |
1979 | addr == (tlb_entry->addr_write & | |
1980 | (TARGET_PAGE_MASK | TLB_INVALID_MASK)) || | |
1981 | addr == (tlb_entry->addr_code & | |
1982 | (TARGET_PAGE_MASK | TLB_INVALID_MASK))) { | |
1983 | *tlb_entry = s_cputlb_empty_entry; | |
1984 | } | |
1985 | } | |
1986 | ||
1987 | void tlb_flush_page(CPUState *env, target_ulong addr) | |
1988 | { | |
1989 | int i; | |
1990 | int mmu_idx; | |
1991 | ||
1992 | #if defined(DEBUG_TLB) | |
1993 | printf("tlb_flush_page: " TARGET_FMT_lx "\n", addr); | |
1994 | #endif | |
1995 | /* Check if we need to flush due to large pages. */ | |
1996 | if ((addr & env->tlb_flush_mask) == env->tlb_flush_addr) { | |
1997 | #if defined(DEBUG_TLB) | |
1998 | printf("tlb_flush_page: forced full flush (" | |
1999 | TARGET_FMT_lx "/" TARGET_FMT_lx ")\n", | |
2000 | env->tlb_flush_addr, env->tlb_flush_mask); | |
2001 | #endif | |
2002 | tlb_flush(env, 1); | |
2003 | return; | |
2004 | } | |
2005 | /* must reset current TB so that interrupts cannot modify the | |
2006 | links while we are modifying them */ | |
2007 | env->current_tb = NULL; | |
2008 | ||
2009 | addr &= TARGET_PAGE_MASK; | |
2010 | i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
2011 | for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) | |
2012 | tlb_flush_entry(&env->tlb_table[mmu_idx][i], addr); | |
2013 | ||
2014 | tlb_flush_jmp_cache(env, addr); | |
2015 | } | |
2016 | ||
2017 | /* update the TLBs so that writes to code in the virtual page 'addr' | |
2018 | can be detected */ | |
2019 | static void tlb_protect_code(ram_addr_t ram_addr) | |
2020 | { | |
2021 | cpu_physical_memory_reset_dirty(ram_addr, | |
2022 | ram_addr + TARGET_PAGE_SIZE, | |
2023 | CODE_DIRTY_FLAG); | |
2024 | } | |
2025 | ||
2026 | /* update the TLB so that writes in physical page 'phys_addr' are no longer | |
2027 | tested for self modifying code */ | |
2028 | static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr, | |
2029 | target_ulong vaddr) | |
2030 | { | |
2031 | cpu_physical_memory_set_dirty_flags(ram_addr, CODE_DIRTY_FLAG); | |
2032 | } | |
2033 | ||
2034 | static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry, | |
2035 | unsigned long start, unsigned long length) | |
2036 | { | |
2037 | unsigned long addr; | |
2038 | if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == io_mem_ram.ram_addr) { | |
2039 | addr = (tlb_entry->addr_write & TARGET_PAGE_MASK) + tlb_entry->addend; | |
2040 | if ((addr - start) < length) { | |
2041 | tlb_entry->addr_write = (tlb_entry->addr_write & TARGET_PAGE_MASK) | TLB_NOTDIRTY; | |
2042 | } | |
2043 | } | |
2044 | } | |
2045 | ||
2046 | /* Note: start and end must be within the same ram block. */ | |
2047 | void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end, | |
2048 | int dirty_flags) | |
2049 | { | |
2050 | CPUState *env; | |
2051 | unsigned long length, start1; | |
2052 | int i; | |
2053 | ||
2054 | start &= TARGET_PAGE_MASK; | |
2055 | end = TARGET_PAGE_ALIGN(end); | |
2056 | ||
2057 | length = end - start; | |
2058 | if (length == 0) | |
2059 | return; | |
2060 | cpu_physical_memory_mask_dirty_range(start, length, dirty_flags); | |
2061 | ||
2062 | /* we modify the TLB cache so that the dirty bit will be set again | |
2063 | when accessing the range */ | |
2064 | start1 = (unsigned long)qemu_safe_ram_ptr(start); | |
2065 | /* Check that we don't span multiple blocks - this breaks the | |
2066 | address comparisons below. */ | |
2067 | if ((unsigned long)qemu_safe_ram_ptr(end - 1) - start1 | |
2068 | != (end - 1) - start) { | |
2069 | abort(); | |
2070 | } | |
2071 | ||
2072 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
2073 | int mmu_idx; | |
2074 | for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { | |
2075 | for(i = 0; i < CPU_TLB_SIZE; i++) | |
2076 | tlb_reset_dirty_range(&env->tlb_table[mmu_idx][i], | |
2077 | start1, length); | |
2078 | } | |
2079 | } | |
2080 | } | |
2081 | ||
2082 | int cpu_physical_memory_set_dirty_tracking(int enable) | |
2083 | { | |
2084 | int ret = 0; | |
2085 | in_migration = enable; | |
2086 | return ret; | |
2087 | } | |
2088 | ||
2089 | static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry) | |
2090 | { | |
2091 | ram_addr_t ram_addr; | |
2092 | void *p; | |
2093 | ||
2094 | if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == io_mem_ram.ram_addr) { | |
2095 | p = (void *)(unsigned long)((tlb_entry->addr_write & TARGET_PAGE_MASK) | |
2096 | + tlb_entry->addend); | |
2097 | ram_addr = qemu_ram_addr_from_host_nofail(p); | |
2098 | if (!cpu_physical_memory_is_dirty(ram_addr)) { | |
2099 | tlb_entry->addr_write |= TLB_NOTDIRTY; | |
2100 | } | |
2101 | } | |
2102 | } | |
2103 | ||
2104 | /* update the TLB according to the current state of the dirty bits */ | |
2105 | void cpu_tlb_update_dirty(CPUState *env) | |
2106 | { | |
2107 | int i; | |
2108 | int mmu_idx; | |
2109 | for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { | |
2110 | for(i = 0; i < CPU_TLB_SIZE; i++) | |
2111 | tlb_update_dirty(&env->tlb_table[mmu_idx][i]); | |
2112 | } | |
2113 | } | |
2114 | ||
2115 | static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, target_ulong vaddr) | |
2116 | { | |
2117 | if (tlb_entry->addr_write == (vaddr | TLB_NOTDIRTY)) | |
2118 | tlb_entry->addr_write = vaddr; | |
2119 | } | |
2120 | ||
2121 | /* update the TLB corresponding to virtual page vaddr | |
2122 | so that it is no longer dirty */ | |
2123 | static inline void tlb_set_dirty(CPUState *env, target_ulong vaddr) | |
2124 | { | |
2125 | int i; | |
2126 | int mmu_idx; | |
2127 | ||
2128 | vaddr &= TARGET_PAGE_MASK; | |
2129 | i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
2130 | for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) | |
2131 | tlb_set_dirty1(&env->tlb_table[mmu_idx][i], vaddr); | |
2132 | } | |
2133 | ||
2134 | /* Our TLB does not support large pages, so remember the area covered by | |
2135 | large pages and trigger a full TLB flush if these are invalidated. */ | |
2136 | static void tlb_add_large_page(CPUState *env, target_ulong vaddr, | |
2137 | target_ulong size) | |
2138 | { | |
2139 | target_ulong mask = ~(size - 1); | |
2140 | ||
2141 | if (env->tlb_flush_addr == (target_ulong)-1) { | |
2142 | env->tlb_flush_addr = vaddr & mask; | |
2143 | env->tlb_flush_mask = mask; | |
2144 | return; | |
2145 | } | |
2146 | /* Extend the existing region to include the new page. | |
2147 | This is a compromise between unnecessary flushes and the cost | |
2148 | of maintaining a full variable size TLB. */ | |
2149 | mask &= env->tlb_flush_mask; | |
2150 | while (((env->tlb_flush_addr ^ vaddr) & mask) != 0) { | |
2151 | mask <<= 1; | |
2152 | } | |
2153 | env->tlb_flush_addr &= mask; | |
2154 | env->tlb_flush_mask = mask; | |
2155 | } | |
2156 | ||
2157 | static bool is_ram_rom(MemoryRegionSection *s) | |
2158 | { | |
2159 | return memory_region_is_ram(s->mr); | |
2160 | } | |
2161 | ||
2162 | static bool is_romd(MemoryRegionSection *s) | |
2163 | { | |
2164 | MemoryRegion *mr = s->mr; | |
2165 | ||
2166 | return mr->rom_device && mr->readable; | |
2167 | } | |
2168 | ||
2169 | static bool is_ram_rom_romd(MemoryRegionSection *s) | |
2170 | { | |
2171 | return is_ram_rom(s) || is_romd(s); | |
2172 | } | |
2173 | ||
2174 | /* Add a new TLB entry. At most one entry for a given virtual address | |
2175 | is permitted. Only a single TARGET_PAGE_SIZE region is mapped, the | |
2176 | supplied size is only used by tlb_flush_page. */ | |
2177 | void tlb_set_page(CPUState *env, target_ulong vaddr, | |
2178 | target_phys_addr_t paddr, int prot, | |
2179 | int mmu_idx, target_ulong size) | |
2180 | { | |
2181 | MemoryRegionSection *section; | |
2182 | unsigned int index; | |
2183 | target_ulong address; | |
2184 | target_ulong code_address; | |
2185 | unsigned long addend; | |
2186 | CPUTLBEntry *te; | |
2187 | CPUWatchpoint *wp; | |
2188 | target_phys_addr_t iotlb; | |
2189 | ||
2190 | assert(size >= TARGET_PAGE_SIZE); | |
2191 | if (size != TARGET_PAGE_SIZE) { | |
2192 | tlb_add_large_page(env, vaddr, size); | |
2193 | } | |
2194 | section = phys_page_find(paddr >> TARGET_PAGE_BITS); | |
2195 | #if defined(DEBUG_TLB) | |
2196 | printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x" TARGET_FMT_plx | |
2197 | " prot=%x idx=%d pd=0x%08lx\n", | |
2198 | vaddr, paddr, prot, mmu_idx, pd); | |
2199 | #endif | |
2200 | ||
2201 | address = vaddr; | |
2202 | if (!is_ram_rom_romd(section)) { | |
2203 | /* IO memory case (romd handled later) */ | |
2204 | address |= TLB_MMIO; | |
2205 | } | |
2206 | if (is_ram_rom_romd(section)) { | |
2207 | addend = (unsigned long)memory_region_get_ram_ptr(section->mr) | |
2208 | + section_addr(section, paddr); | |
2209 | } else { | |
2210 | addend = 0; | |
2211 | } | |
2212 | if (is_ram_rom(section)) { | |
2213 | /* Normal RAM. */ | |
2214 | iotlb = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) | |
2215 | + section_addr(section, paddr); | |
2216 | if (!section->readonly) | |
2217 | iotlb |= io_mem_notdirty.ram_addr; | |
2218 | else | |
2219 | iotlb |= io_mem_rom.ram_addr; | |
2220 | } else { | |
2221 | /* IO handlers are currently passed a physical address. | |
2222 | It would be nice to pass an offset from the base address | |
2223 | of that region. This would avoid having to special case RAM, | |
2224 | and avoid full address decoding in every device. | |
2225 | We can't use the high bits of pd for this because | |
2226 | IO_MEM_ROMD uses these as a ram address. */ | |
2227 | iotlb = memory_region_get_ram_addr(section->mr) & ~TARGET_PAGE_MASK; | |
2228 | iotlb += section_addr(section, paddr); | |
2229 | } | |
2230 | ||
2231 | code_address = address; | |
2232 | /* Make accesses to pages with watchpoints go via the | |
2233 | watchpoint trap routines. */ | |
2234 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
2235 | if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) { | |
2236 | /* Avoid trapping reads of pages with a write breakpoint. */ | |
2237 | if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) { | |
2238 | iotlb = io_mem_watch.ram_addr + paddr; | |
2239 | address |= TLB_MMIO; | |
2240 | break; | |
2241 | } | |
2242 | } | |
2243 | } | |
2244 | ||
2245 | index = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
2246 | env->iotlb[mmu_idx][index] = iotlb - vaddr; | |
2247 | te = &env->tlb_table[mmu_idx][index]; | |
2248 | te->addend = addend - vaddr; | |
2249 | if (prot & PAGE_READ) { | |
2250 | te->addr_read = address; | |
2251 | } else { | |
2252 | te->addr_read = -1; | |
2253 | } | |
2254 | ||
2255 | if (prot & PAGE_EXEC) { | |
2256 | te->addr_code = code_address; | |
2257 | } else { | |
2258 | te->addr_code = -1; | |
2259 | } | |
2260 | if (prot & PAGE_WRITE) { | |
2261 | if ((memory_region_is_ram(section->mr) && section->readonly) | |
2262 | || is_romd(section)) { | |
2263 | /* Write access calls the I/O callback. */ | |
2264 | te->addr_write = address | TLB_MMIO; | |
2265 | } else if (memory_region_is_ram(section->mr) | |
2266 | && !cpu_physical_memory_is_dirty( | |
2267 | section->mr->ram_addr | |
2268 | + section_addr(section, paddr))) { | |
2269 | te->addr_write = address | TLB_NOTDIRTY; | |
2270 | } else { | |
2271 | te->addr_write = address; | |
2272 | } | |
2273 | } else { | |
2274 | te->addr_write = -1; | |
2275 | } | |
2276 | } | |
2277 | ||
2278 | #else | |
2279 | ||
2280 | void tlb_flush(CPUState *env, int flush_global) | |
2281 | { | |
2282 | } | |
2283 | ||
2284 | void tlb_flush_page(CPUState *env, target_ulong addr) | |
2285 | { | |
2286 | } | |
2287 | ||
2288 | /* | |
2289 | * Walks guest process memory "regions" one by one | |
2290 | * and calls callback function 'fn' for each region. | |
2291 | */ | |
2292 | ||
2293 | struct walk_memory_regions_data | |
2294 | { | |
2295 | walk_memory_regions_fn fn; | |
2296 | void *priv; | |
2297 | unsigned long start; | |
2298 | int prot; | |
2299 | }; | |
2300 | ||
2301 | static int walk_memory_regions_end(struct walk_memory_regions_data *data, | |
2302 | abi_ulong end, int new_prot) | |
2303 | { | |
2304 | if (data->start != -1ul) { | |
2305 | int rc = data->fn(data->priv, data->start, end, data->prot); | |
2306 | if (rc != 0) { | |
2307 | return rc; | |
2308 | } | |
2309 | } | |
2310 | ||
2311 | data->start = (new_prot ? end : -1ul); | |
2312 | data->prot = new_prot; | |
2313 | ||
2314 | return 0; | |
2315 | } | |
2316 | ||
2317 | static int walk_memory_regions_1(struct walk_memory_regions_data *data, | |
2318 | abi_ulong base, int level, void **lp) | |
2319 | { | |
2320 | abi_ulong pa; | |
2321 | int i, rc; | |
2322 | ||
2323 | if (*lp == NULL) { | |
2324 | return walk_memory_regions_end(data, base, 0); | |
2325 | } | |
2326 | ||
2327 | if (level == 0) { | |
2328 | PageDesc *pd = *lp; | |
2329 | for (i = 0; i < L2_SIZE; ++i) { | |
2330 | int prot = pd[i].flags; | |
2331 | ||
2332 | pa = base | (i << TARGET_PAGE_BITS); | |
2333 | if (prot != data->prot) { | |
2334 | rc = walk_memory_regions_end(data, pa, prot); | |
2335 | if (rc != 0) { | |
2336 | return rc; | |
2337 | } | |
2338 | } | |
2339 | } | |
2340 | } else { | |
2341 | void **pp = *lp; | |
2342 | for (i = 0; i < L2_SIZE; ++i) { | |
2343 | pa = base | ((abi_ulong)i << | |
2344 | (TARGET_PAGE_BITS + L2_BITS * level)); | |
2345 | rc = walk_memory_regions_1(data, pa, level - 1, pp + i); | |
2346 | if (rc != 0) { | |
2347 | return rc; | |
2348 | } | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | return 0; | |
2353 | } | |
2354 | ||
2355 | int walk_memory_regions(void *priv, walk_memory_regions_fn fn) | |
2356 | { | |
2357 | struct walk_memory_regions_data data; | |
2358 | unsigned long i; | |
2359 | ||
2360 | data.fn = fn; | |
2361 | data.priv = priv; | |
2362 | data.start = -1ul; | |
2363 | data.prot = 0; | |
2364 | ||
2365 | for (i = 0; i < V_L1_SIZE; i++) { | |
2366 | int rc = walk_memory_regions_1(&data, (abi_ulong)i << V_L1_SHIFT, | |
2367 | V_L1_SHIFT / L2_BITS - 1, l1_map + i); | |
2368 | if (rc != 0) { | |
2369 | return rc; | |
2370 | } | |
2371 | } | |
2372 | ||
2373 | return walk_memory_regions_end(&data, 0, 0); | |
2374 | } | |
2375 | ||
2376 | static int dump_region(void *priv, abi_ulong start, | |
2377 | abi_ulong end, unsigned long prot) | |
2378 | { | |
2379 | FILE *f = (FILE *)priv; | |
2380 | ||
2381 | (void) fprintf(f, TARGET_ABI_FMT_lx"-"TARGET_ABI_FMT_lx | |
2382 | " "TARGET_ABI_FMT_lx" %c%c%c\n", | |
2383 | start, end, end - start, | |
2384 | ((prot & PAGE_READ) ? 'r' : '-'), | |
2385 | ((prot & PAGE_WRITE) ? 'w' : '-'), | |
2386 | ((prot & PAGE_EXEC) ? 'x' : '-')); | |
2387 | ||
2388 | return (0); | |
2389 | } | |
2390 | ||
2391 | /* dump memory mappings */ | |
2392 | void page_dump(FILE *f) | |
2393 | { | |
2394 | (void) fprintf(f, "%-8s %-8s %-8s %s\n", | |
2395 | "start", "end", "size", "prot"); | |
2396 | walk_memory_regions(f, dump_region); | |
2397 | } | |
2398 | ||
2399 | int page_get_flags(target_ulong address) | |
2400 | { | |
2401 | PageDesc *p; | |
2402 | ||
2403 | p = page_find(address >> TARGET_PAGE_BITS); | |
2404 | if (!p) | |
2405 | return 0; | |
2406 | return p->flags; | |
2407 | } | |
2408 | ||
2409 | /* Modify the flags of a page and invalidate the code if necessary. | |
2410 | The flag PAGE_WRITE_ORG is positioned automatically depending | |
2411 | on PAGE_WRITE. The mmap_lock should already be held. */ | |
2412 | void page_set_flags(target_ulong start, target_ulong end, int flags) | |
2413 | { | |
2414 | target_ulong addr, len; | |
2415 | ||
2416 | /* This function should never be called with addresses outside the | |
2417 | guest address space. If this assert fires, it probably indicates | |
2418 | a missing call to h2g_valid. */ | |
2419 | #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS | |
2420 | assert(end < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS)); | |
2421 | #endif | |
2422 | assert(start < end); | |
2423 | ||
2424 | start = start & TARGET_PAGE_MASK; | |
2425 | end = TARGET_PAGE_ALIGN(end); | |
2426 | ||
2427 | if (flags & PAGE_WRITE) { | |
2428 | flags |= PAGE_WRITE_ORG; | |
2429 | } | |
2430 | ||
2431 | for (addr = start, len = end - start; | |
2432 | len != 0; | |
2433 | len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { | |
2434 | PageDesc *p = page_find_alloc(addr >> TARGET_PAGE_BITS, 1); | |
2435 | ||
2436 | /* If the write protection bit is set, then we invalidate | |
2437 | the code inside. */ | |
2438 | if (!(p->flags & PAGE_WRITE) && | |
2439 | (flags & PAGE_WRITE) && | |
2440 | p->first_tb) { | |
2441 | tb_invalidate_phys_page(addr, 0, NULL); | |
2442 | } | |
2443 | p->flags = flags; | |
2444 | } | |
2445 | } | |
2446 | ||
2447 | int page_check_range(target_ulong start, target_ulong len, int flags) | |
2448 | { | |
2449 | PageDesc *p; | |
2450 | target_ulong end; | |
2451 | target_ulong addr; | |
2452 | ||
2453 | /* This function should never be called with addresses outside the | |
2454 | guest address space. If this assert fires, it probably indicates | |
2455 | a missing call to h2g_valid. */ | |
2456 | #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS | |
2457 | assert(start < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS)); | |
2458 | #endif | |
2459 | ||
2460 | if (len == 0) { | |
2461 | return 0; | |
2462 | } | |
2463 | if (start + len - 1 < start) { | |
2464 | /* We've wrapped around. */ | |
2465 | return -1; | |
2466 | } | |
2467 | ||
2468 | end = TARGET_PAGE_ALIGN(start+len); /* must do before we loose bits in the next step */ | |
2469 | start = start & TARGET_PAGE_MASK; | |
2470 | ||
2471 | for (addr = start, len = end - start; | |
2472 | len != 0; | |
2473 | len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { | |
2474 | p = page_find(addr >> TARGET_PAGE_BITS); | |
2475 | if( !p ) | |
2476 | return -1; | |
2477 | if( !(p->flags & PAGE_VALID) ) | |
2478 | return -1; | |
2479 | ||
2480 | if ((flags & PAGE_READ) && !(p->flags & PAGE_READ)) | |
2481 | return -1; | |
2482 | if (flags & PAGE_WRITE) { | |
2483 | if (!(p->flags & PAGE_WRITE_ORG)) | |
2484 | return -1; | |
2485 | /* unprotect the page if it was put read-only because it | |
2486 | contains translated code */ | |
2487 | if (!(p->flags & PAGE_WRITE)) { | |
2488 | if (!page_unprotect(addr, 0, NULL)) | |
2489 | return -1; | |
2490 | } | |
2491 | return 0; | |
2492 | } | |
2493 | } | |
2494 | return 0; | |
2495 | } | |
2496 | ||
2497 | /* called from signal handler: invalidate the code and unprotect the | |
2498 | page. Return TRUE if the fault was successfully handled. */ | |
2499 | int page_unprotect(target_ulong address, unsigned long pc, void *puc) | |
2500 | { | |
2501 | unsigned int prot; | |
2502 | PageDesc *p; | |
2503 | target_ulong host_start, host_end, addr; | |
2504 | ||
2505 | /* Technically this isn't safe inside a signal handler. However we | |
2506 | know this only ever happens in a synchronous SEGV handler, so in | |
2507 | practice it seems to be ok. */ | |
2508 | mmap_lock(); | |
2509 | ||
2510 | p = page_find(address >> TARGET_PAGE_BITS); | |
2511 | if (!p) { | |
2512 | mmap_unlock(); | |
2513 | return 0; | |
2514 | } | |
2515 | ||
2516 | /* if the page was really writable, then we change its | |
2517 | protection back to writable */ | |
2518 | if ((p->flags & PAGE_WRITE_ORG) && !(p->flags & PAGE_WRITE)) { | |
2519 | host_start = address & qemu_host_page_mask; | |
2520 | host_end = host_start + qemu_host_page_size; | |
2521 | ||
2522 | prot = 0; | |
2523 | for (addr = host_start ; addr < host_end ; addr += TARGET_PAGE_SIZE) { | |
2524 | p = page_find(addr >> TARGET_PAGE_BITS); | |
2525 | p->flags |= PAGE_WRITE; | |
2526 | prot |= p->flags; | |
2527 | ||
2528 | /* and since the content will be modified, we must invalidate | |
2529 | the corresponding translated code. */ | |
2530 | tb_invalidate_phys_page(addr, pc, puc); | |
2531 | #ifdef DEBUG_TB_CHECK | |
2532 | tb_invalidate_check(addr); | |
2533 | #endif | |
2534 | } | |
2535 | mprotect((void *)g2h(host_start), qemu_host_page_size, | |
2536 | prot & PAGE_BITS); | |
2537 | ||
2538 | mmap_unlock(); | |
2539 | return 1; | |
2540 | } | |
2541 | mmap_unlock(); | |
2542 | return 0; | |
2543 | } | |
2544 | ||
2545 | static inline void tlb_set_dirty(CPUState *env, | |
2546 | unsigned long addr, target_ulong vaddr) | |
2547 | { | |
2548 | } | |
2549 | #endif /* defined(CONFIG_USER_ONLY) */ | |
2550 | ||
2551 | #if !defined(CONFIG_USER_ONLY) | |
2552 | ||
2553 | #define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK) | |
2554 | typedef struct subpage_t { | |
2555 | MemoryRegion iomem; | |
2556 | target_phys_addr_t base; | |
2557 | uint16_t sub_section[TARGET_PAGE_SIZE]; | |
2558 | } subpage_t; | |
2559 | ||
2560 | static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, | |
2561 | uint16_t section); | |
2562 | static subpage_t *subpage_init(target_phys_addr_t base); | |
2563 | static void destroy_page_desc(uint16_t section_index) | |
2564 | { | |
2565 | MemoryRegionSection *section = &phys_sections[section_index]; | |
2566 | MemoryRegion *mr = section->mr; | |
2567 | ||
2568 | if (mr->subpage) { | |
2569 | subpage_t *subpage = container_of(mr, subpage_t, iomem); | |
2570 | memory_region_destroy(&subpage->iomem); | |
2571 | g_free(subpage); | |
2572 | } | |
2573 | } | |
2574 | ||
2575 | static void destroy_l2_mapping(PhysPageEntry *lp, unsigned level) | |
2576 | { | |
2577 | unsigned i; | |
2578 | PhysPageEntry *p; | |
2579 | ||
2580 | if (lp->ptr == PHYS_MAP_NODE_NIL) { | |
2581 | return; | |
2582 | } | |
2583 | ||
2584 | p = phys_map_nodes[lp->ptr]; | |
2585 | for (i = 0; i < L2_SIZE; ++i) { | |
2586 | if (!p[i].is_leaf) { | |
2587 | destroy_l2_mapping(&p[i], level - 1); | |
2588 | } else { | |
2589 | destroy_page_desc(p[i].ptr); | |
2590 | } | |
2591 | } | |
2592 | lp->is_leaf = 0; | |
2593 | lp->ptr = PHYS_MAP_NODE_NIL; | |
2594 | } | |
2595 | ||
2596 | static void destroy_all_mappings(void) | |
2597 | { | |
2598 | destroy_l2_mapping(&phys_map, P_L2_LEVELS - 1); | |
2599 | phys_map_nodes_reset(); | |
2600 | } | |
2601 | ||
2602 | static uint16_t phys_section_add(MemoryRegionSection *section) | |
2603 | { | |
2604 | if (phys_sections_nb == phys_sections_nb_alloc) { | |
2605 | phys_sections_nb_alloc = MAX(phys_sections_nb_alloc * 2, 16); | |
2606 | phys_sections = g_renew(MemoryRegionSection, phys_sections, | |
2607 | phys_sections_nb_alloc); | |
2608 | } | |
2609 | phys_sections[phys_sections_nb] = *section; | |
2610 | return phys_sections_nb++; | |
2611 | } | |
2612 | ||
2613 | static void phys_sections_clear(void) | |
2614 | { | |
2615 | phys_sections_nb = 0; | |
2616 | } | |
2617 | ||
2618 | /* register physical memory. | |
2619 | For RAM, 'size' must be a multiple of the target page size. | |
2620 | If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an | |
2621 | io memory page. The address used when calling the IO function is | |
2622 | the offset from the start of the region, plus region_offset. Both | |
2623 | start_addr and region_offset are rounded down to a page boundary | |
2624 | before calculating this offset. This should not be a problem unless | |
2625 | the low bits of start_addr and region_offset differ. */ | |
2626 | static void register_subpage(MemoryRegionSection *section) | |
2627 | { | |
2628 | subpage_t *subpage; | |
2629 | target_phys_addr_t base = section->offset_within_address_space | |
2630 | & TARGET_PAGE_MASK; | |
2631 | MemoryRegionSection *existing = phys_page_find(base >> TARGET_PAGE_BITS); | |
2632 | MemoryRegionSection subsection = { | |
2633 | .offset_within_address_space = base, | |
2634 | .size = TARGET_PAGE_SIZE, | |
2635 | }; | |
2636 | target_phys_addr_t start, end; | |
2637 | ||
2638 | assert(existing->mr->subpage || existing->mr == &io_mem_unassigned); | |
2639 | ||
2640 | if (!(existing->mr->subpage)) { | |
2641 | subpage = subpage_init(base); | |
2642 | subsection.mr = &subpage->iomem; | |
2643 | phys_page_set(base >> TARGET_PAGE_BITS, 1, | |
2644 | phys_section_add(&subsection)); | |
2645 | } else { | |
2646 | subpage = container_of(existing->mr, subpage_t, iomem); | |
2647 | } | |
2648 | start = section->offset_within_address_space & ~TARGET_PAGE_MASK; | |
2649 | end = start + section->size; | |
2650 | subpage_register(subpage, start, end, phys_section_add(section)); | |
2651 | } | |
2652 | ||
2653 | ||
2654 | static void register_multipage(MemoryRegionSection *section) | |
2655 | { | |
2656 | target_phys_addr_t start_addr = section->offset_within_address_space; | |
2657 | ram_addr_t size = section->size; | |
2658 | target_phys_addr_t addr; | |
2659 | uint16_t section_index = phys_section_add(section); | |
2660 | ||
2661 | assert(size); | |
2662 | ||
2663 | addr = start_addr; | |
2664 | phys_page_set(addr >> TARGET_PAGE_BITS, size >> TARGET_PAGE_BITS, | |
2665 | section_index); | |
2666 | } | |
2667 | ||
2668 | void cpu_register_physical_memory_log(MemoryRegionSection *section, | |
2669 | bool readonly) | |
2670 | { | |
2671 | MemoryRegionSection now = *section, remain = *section; | |
2672 | ||
2673 | if ((now.offset_within_address_space & ~TARGET_PAGE_MASK) | |
2674 | || (now.size < TARGET_PAGE_SIZE)) { | |
2675 | now.size = MIN(TARGET_PAGE_ALIGN(now.offset_within_address_space) | |
2676 | - now.offset_within_address_space, | |
2677 | now.size); | |
2678 | register_subpage(&now); | |
2679 | remain.size -= now.size; | |
2680 | remain.offset_within_address_space += now.size; | |
2681 | remain.offset_within_region += now.size; | |
2682 | } | |
2683 | now = remain; | |
2684 | now.size &= TARGET_PAGE_MASK; | |
2685 | if (now.size) { | |
2686 | register_multipage(&now); | |
2687 | remain.size -= now.size; | |
2688 | remain.offset_within_address_space += now.size; | |
2689 | remain.offset_within_region += now.size; | |
2690 | } | |
2691 | now = remain; | |
2692 | if (now.size) { | |
2693 | register_subpage(&now); | |
2694 | } | |
2695 | } | |
2696 | ||
2697 | ||
2698 | void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size) | |
2699 | { | |
2700 | if (kvm_enabled()) | |
2701 | kvm_coalesce_mmio_region(addr, size); | |
2702 | } | |
2703 | ||
2704 | void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size) | |
2705 | { | |
2706 | if (kvm_enabled()) | |
2707 | kvm_uncoalesce_mmio_region(addr, size); | |
2708 | } | |
2709 | ||
2710 | void qemu_flush_coalesced_mmio_buffer(void) | |
2711 | { | |
2712 | if (kvm_enabled()) | |
2713 | kvm_flush_coalesced_mmio_buffer(); | |
2714 | } | |
2715 | ||
2716 | #if defined(__linux__) && !defined(TARGET_S390X) | |
2717 | ||
2718 | #include <sys/vfs.h> | |
2719 | ||
2720 | #define HUGETLBFS_MAGIC 0x958458f6 | |
2721 | ||
2722 | static long gethugepagesize(const char *path) | |
2723 | { | |
2724 | struct statfs fs; | |
2725 | int ret; | |
2726 | ||
2727 | do { | |
2728 | ret = statfs(path, &fs); | |
2729 | } while (ret != 0 && errno == EINTR); | |
2730 | ||
2731 | if (ret != 0) { | |
2732 | perror(path); | |
2733 | return 0; | |
2734 | } | |
2735 | ||
2736 | if (fs.f_type != HUGETLBFS_MAGIC) | |
2737 | fprintf(stderr, "Warning: path not on HugeTLBFS: %s\n", path); | |
2738 | ||
2739 | return fs.f_bsize; | |
2740 | } | |
2741 | ||
2742 | static void *file_ram_alloc(RAMBlock *block, | |
2743 | ram_addr_t memory, | |
2744 | const char *path) | |
2745 | { | |
2746 | char *filename; | |
2747 | void *area; | |
2748 | int fd; | |
2749 | #ifdef MAP_POPULATE | |
2750 | int flags; | |
2751 | #endif | |
2752 | unsigned long hpagesize; | |
2753 | ||
2754 | hpagesize = gethugepagesize(path); | |
2755 | if (!hpagesize) { | |
2756 | return NULL; | |
2757 | } | |
2758 | ||
2759 | if (memory < hpagesize) { | |
2760 | return NULL; | |
2761 | } | |
2762 | ||
2763 | if (kvm_enabled() && !kvm_has_sync_mmu()) { | |
2764 | fprintf(stderr, "host lacks kvm mmu notifiers, -mem-path unsupported\n"); | |
2765 | return NULL; | |
2766 | } | |
2767 | ||
2768 | if (asprintf(&filename, "%s/qemu_back_mem.XXXXXX", path) == -1) { | |
2769 | return NULL; | |
2770 | } | |
2771 | ||
2772 | fd = mkstemp(filename); | |
2773 | if (fd < 0) { | |
2774 | perror("unable to create backing store for hugepages"); | |
2775 | free(filename); | |
2776 | return NULL; | |
2777 | } | |
2778 | unlink(filename); | |
2779 | free(filename); | |
2780 | ||
2781 | memory = (memory+hpagesize-1) & ~(hpagesize-1); | |
2782 | ||
2783 | /* | |
2784 | * ftruncate is not supported by hugetlbfs in older | |
2785 | * hosts, so don't bother bailing out on errors. | |
2786 | * If anything goes wrong with it under other filesystems, | |
2787 | * mmap will fail. | |
2788 | */ | |
2789 | if (ftruncate(fd, memory)) | |
2790 | perror("ftruncate"); | |
2791 | ||
2792 | #ifdef MAP_POPULATE | |
2793 | /* NB: MAP_POPULATE won't exhaustively alloc all phys pages in the case | |
2794 | * MAP_PRIVATE is requested. For mem_prealloc we mmap as MAP_SHARED | |
2795 | * to sidestep this quirk. | |
2796 | */ | |
2797 | flags = mem_prealloc ? MAP_POPULATE | MAP_SHARED : MAP_PRIVATE; | |
2798 | area = mmap(0, memory, PROT_READ | PROT_WRITE, flags, fd, 0); | |
2799 | #else | |
2800 | area = mmap(0, memory, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); | |
2801 | #endif | |
2802 | if (area == MAP_FAILED) { | |
2803 | perror("file_ram_alloc: can't mmap RAM pages"); | |
2804 | close(fd); | |
2805 | return (NULL); | |
2806 | } | |
2807 | block->fd = fd; | |
2808 | return area; | |
2809 | } | |
2810 | #endif | |
2811 | ||
2812 | static ram_addr_t find_ram_offset(ram_addr_t size) | |
2813 | { | |
2814 | RAMBlock *block, *next_block; | |
2815 | ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX; | |
2816 | ||
2817 | if (QLIST_EMPTY(&ram_list.blocks)) | |
2818 | return 0; | |
2819 | ||
2820 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
2821 | ram_addr_t end, next = RAM_ADDR_MAX; | |
2822 | ||
2823 | end = block->offset + block->length; | |
2824 | ||
2825 | QLIST_FOREACH(next_block, &ram_list.blocks, next) { | |
2826 | if (next_block->offset >= end) { | |
2827 | next = MIN(next, next_block->offset); | |
2828 | } | |
2829 | } | |
2830 | if (next - end >= size && next - end < mingap) { | |
2831 | offset = end; | |
2832 | mingap = next - end; | |
2833 | } | |
2834 | } | |
2835 | ||
2836 | if (offset == RAM_ADDR_MAX) { | |
2837 | fprintf(stderr, "Failed to find gap of requested size: %" PRIu64 "\n", | |
2838 | (uint64_t)size); | |
2839 | abort(); | |
2840 | } | |
2841 | ||
2842 | return offset; | |
2843 | } | |
2844 | ||
2845 | static ram_addr_t last_ram_offset(void) | |
2846 | { | |
2847 | RAMBlock *block; | |
2848 | ram_addr_t last = 0; | |
2849 | ||
2850 | QLIST_FOREACH(block, &ram_list.blocks, next) | |
2851 | last = MAX(last, block->offset + block->length); | |
2852 | ||
2853 | return last; | |
2854 | } | |
2855 | ||
2856 | void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev) | |
2857 | { | |
2858 | RAMBlock *new_block, *block; | |
2859 | ||
2860 | new_block = NULL; | |
2861 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
2862 | if (block->offset == addr) { | |
2863 | new_block = block; | |
2864 | break; | |
2865 | } | |
2866 | } | |
2867 | assert(new_block); | |
2868 | assert(!new_block->idstr[0]); | |
2869 | ||
2870 | if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) { | |
2871 | char *id = dev->parent_bus->info->get_dev_path(dev); | |
2872 | if (id) { | |
2873 | snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id); | |
2874 | g_free(id); | |
2875 | } | |
2876 | } | |
2877 | pstrcat(new_block->idstr, sizeof(new_block->idstr), name); | |
2878 | ||
2879 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
2880 | if (block != new_block && !strcmp(block->idstr, new_block->idstr)) { | |
2881 | fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n", | |
2882 | new_block->idstr); | |
2883 | abort(); | |
2884 | } | |
2885 | } | |
2886 | } | |
2887 | ||
2888 | ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, | |
2889 | MemoryRegion *mr) | |
2890 | { | |
2891 | RAMBlock *new_block; | |
2892 | ||
2893 | size = TARGET_PAGE_ALIGN(size); | |
2894 | new_block = g_malloc0(sizeof(*new_block)); | |
2895 | ||
2896 | new_block->mr = mr; | |
2897 | new_block->offset = find_ram_offset(size); | |
2898 | if (host) { | |
2899 | new_block->host = host; | |
2900 | new_block->flags |= RAM_PREALLOC_MASK; | |
2901 | } else { | |
2902 | if (mem_path) { | |
2903 | #if defined (__linux__) && !defined(TARGET_S390X) | |
2904 | new_block->host = file_ram_alloc(new_block, size, mem_path); | |
2905 | if (!new_block->host) { | |
2906 | new_block->host = qemu_vmalloc(size); | |
2907 | qemu_madvise(new_block->host, size, QEMU_MADV_MERGEABLE); | |
2908 | } | |
2909 | #else | |
2910 | fprintf(stderr, "-mem-path option unsupported\n"); | |
2911 | exit(1); | |
2912 | #endif | |
2913 | } else { | |
2914 | #if defined(TARGET_S390X) && defined(CONFIG_KVM) | |
2915 | /* S390 KVM requires the topmost vma of the RAM to be smaller than | |
2916 | an system defined value, which is at least 256GB. Larger systems | |
2917 | have larger values. We put the guest between the end of data | |
2918 | segment (system break) and this value. We use 32GB as a base to | |
2919 | have enough room for the system break to grow. */ | |
2920 | new_block->host = mmap((void*)0x800000000, size, | |
2921 | PROT_EXEC|PROT_READ|PROT_WRITE, | |
2922 | MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); | |
2923 | if (new_block->host == MAP_FAILED) { | |
2924 | fprintf(stderr, "Allocating RAM failed\n"); | |
2925 | abort(); | |
2926 | } | |
2927 | #else | |
2928 | if (xen_enabled()) { | |
2929 | xen_ram_alloc(new_block->offset, size, mr); | |
2930 | } else { | |
2931 | new_block->host = qemu_vmalloc(size); | |
2932 | } | |
2933 | #endif | |
2934 | qemu_madvise(new_block->host, size, QEMU_MADV_MERGEABLE); | |
2935 | } | |
2936 | } | |
2937 | new_block->length = size; | |
2938 | ||
2939 | QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next); | |
2940 | ||
2941 | ram_list.phys_dirty = g_realloc(ram_list.phys_dirty, | |
2942 | last_ram_offset() >> TARGET_PAGE_BITS); | |
2943 | memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS), | |
2944 | 0xff, size >> TARGET_PAGE_BITS); | |
2945 | ||
2946 | if (kvm_enabled()) | |
2947 | kvm_setup_guest_memory(new_block->host, size); | |
2948 | ||
2949 | return new_block->offset; | |
2950 | } | |
2951 | ||
2952 | ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr) | |
2953 | { | |
2954 | return qemu_ram_alloc_from_ptr(size, NULL, mr); | |
2955 | } | |
2956 | ||
2957 | void qemu_ram_free_from_ptr(ram_addr_t addr) | |
2958 | { | |
2959 | RAMBlock *block; | |
2960 | ||
2961 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
2962 | if (addr == block->offset) { | |
2963 | QLIST_REMOVE(block, next); | |
2964 | g_free(block); | |
2965 | return; | |
2966 | } | |
2967 | } | |
2968 | } | |
2969 | ||
2970 | void qemu_ram_free(ram_addr_t addr) | |
2971 | { | |
2972 | RAMBlock *block; | |
2973 | ||
2974 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
2975 | if (addr == block->offset) { | |
2976 | QLIST_REMOVE(block, next); | |
2977 | if (block->flags & RAM_PREALLOC_MASK) { | |
2978 | ; | |
2979 | } else if (mem_path) { | |
2980 | #if defined (__linux__) && !defined(TARGET_S390X) | |
2981 | if (block->fd) { | |
2982 | munmap(block->host, block->length); | |
2983 | close(block->fd); | |
2984 | } else { | |
2985 | qemu_vfree(block->host); | |
2986 | } | |
2987 | #else | |
2988 | abort(); | |
2989 | #endif | |
2990 | } else { | |
2991 | #if defined(TARGET_S390X) && defined(CONFIG_KVM) | |
2992 | munmap(block->host, block->length); | |
2993 | #else | |
2994 | if (xen_enabled()) { | |
2995 | xen_invalidate_map_cache_entry(block->host); | |
2996 | } else { | |
2997 | qemu_vfree(block->host); | |
2998 | } | |
2999 | #endif | |
3000 | } | |
3001 | g_free(block); | |
3002 | return; | |
3003 | } | |
3004 | } | |
3005 | ||
3006 | } | |
3007 | ||
3008 | #ifndef _WIN32 | |
3009 | void qemu_ram_remap(ram_addr_t addr, ram_addr_t length) | |
3010 | { | |
3011 | RAMBlock *block; | |
3012 | ram_addr_t offset; | |
3013 | int flags; | |
3014 | void *area, *vaddr; | |
3015 | ||
3016 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
3017 | offset = addr - block->offset; | |
3018 | if (offset < block->length) { | |
3019 | vaddr = block->host + offset; | |
3020 | if (block->flags & RAM_PREALLOC_MASK) { | |
3021 | ; | |
3022 | } else { | |
3023 | flags = MAP_FIXED; | |
3024 | munmap(vaddr, length); | |
3025 | if (mem_path) { | |
3026 | #if defined(__linux__) && !defined(TARGET_S390X) | |
3027 | if (block->fd) { | |
3028 | #ifdef MAP_POPULATE | |
3029 | flags |= mem_prealloc ? MAP_POPULATE | MAP_SHARED : | |
3030 | MAP_PRIVATE; | |
3031 | #else | |
3032 | flags |= MAP_PRIVATE; | |
3033 | #endif | |
3034 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, | |
3035 | flags, block->fd, offset); | |
3036 | } else { | |
3037 | flags |= MAP_PRIVATE | MAP_ANONYMOUS; | |
3038 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, | |
3039 | flags, -1, 0); | |
3040 | } | |
3041 | #else | |
3042 | abort(); | |
3043 | #endif | |
3044 | } else { | |
3045 | #if defined(TARGET_S390X) && defined(CONFIG_KVM) | |
3046 | flags |= MAP_SHARED | MAP_ANONYMOUS; | |
3047 | area = mmap(vaddr, length, PROT_EXEC|PROT_READ|PROT_WRITE, | |
3048 | flags, -1, 0); | |
3049 | #else | |
3050 | flags |= MAP_PRIVATE | MAP_ANONYMOUS; | |
3051 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, | |
3052 | flags, -1, 0); | |
3053 | #endif | |
3054 | } | |
3055 | if (area != vaddr) { | |
3056 | fprintf(stderr, "Could not remap addr: " | |
3057 | RAM_ADDR_FMT "@" RAM_ADDR_FMT "\n", | |
3058 | length, addr); | |
3059 | exit(1); | |
3060 | } | |
3061 | qemu_madvise(vaddr, length, QEMU_MADV_MERGEABLE); | |
3062 | } | |
3063 | return; | |
3064 | } | |
3065 | } | |
3066 | } | |
3067 | #endif /* !_WIN32 */ | |
3068 | ||
3069 | /* Return a host pointer to ram allocated with qemu_ram_alloc. | |
3070 | With the exception of the softmmu code in this file, this should | |
3071 | only be used for local memory (e.g. video ram) that the device owns, | |
3072 | and knows it isn't going to access beyond the end of the block. | |
3073 | ||
3074 | It should not be used for general purpose DMA. | |
3075 | Use cpu_physical_memory_map/cpu_physical_memory_rw instead. | |
3076 | */ | |
3077 | void *qemu_get_ram_ptr(ram_addr_t addr) | |
3078 | { | |
3079 | RAMBlock *block; | |
3080 | ||
3081 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
3082 | if (addr - block->offset < block->length) { | |
3083 | /* Move this entry to to start of the list. */ | |
3084 | if (block != QLIST_FIRST(&ram_list.blocks)) { | |
3085 | QLIST_REMOVE(block, next); | |
3086 | QLIST_INSERT_HEAD(&ram_list.blocks, block, next); | |
3087 | } | |
3088 | if (xen_enabled()) { | |
3089 | /* We need to check if the requested address is in the RAM | |
3090 | * because we don't want to map the entire memory in QEMU. | |
3091 | * In that case just map until the end of the page. | |
3092 | */ | |
3093 | if (block->offset == 0) { | |
3094 | return xen_map_cache(addr, 0, 0); | |
3095 | } else if (block->host == NULL) { | |
3096 | block->host = | |
3097 | xen_map_cache(block->offset, block->length, 1); | |
3098 | } | |
3099 | } | |
3100 | return block->host + (addr - block->offset); | |
3101 | } | |
3102 | } | |
3103 | ||
3104 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); | |
3105 | abort(); | |
3106 | ||
3107 | return NULL; | |
3108 | } | |
3109 | ||
3110 | /* Return a host pointer to ram allocated with qemu_ram_alloc. | |
3111 | * Same as qemu_get_ram_ptr but avoid reordering ramblocks. | |
3112 | */ | |
3113 | void *qemu_safe_ram_ptr(ram_addr_t addr) | |
3114 | { | |
3115 | RAMBlock *block; | |
3116 | ||
3117 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
3118 | if (addr - block->offset < block->length) { | |
3119 | if (xen_enabled()) { | |
3120 | /* We need to check if the requested address is in the RAM | |
3121 | * because we don't want to map the entire memory in QEMU. | |
3122 | * In that case just map until the end of the page. | |
3123 | */ | |
3124 | if (block->offset == 0) { | |
3125 | return xen_map_cache(addr, 0, 0); | |
3126 | } else if (block->host == NULL) { | |
3127 | block->host = | |
3128 | xen_map_cache(block->offset, block->length, 1); | |
3129 | } | |
3130 | } | |
3131 | return block->host + (addr - block->offset); | |
3132 | } | |
3133 | } | |
3134 | ||
3135 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); | |
3136 | abort(); | |
3137 | ||
3138 | return NULL; | |
3139 | } | |
3140 | ||
3141 | /* Return a host pointer to guest's ram. Similar to qemu_get_ram_ptr | |
3142 | * but takes a size argument */ | |
3143 | void *qemu_ram_ptr_length(ram_addr_t addr, ram_addr_t *size) | |
3144 | { | |
3145 | if (*size == 0) { | |
3146 | return NULL; | |
3147 | } | |
3148 | if (xen_enabled()) { | |
3149 | return xen_map_cache(addr, *size, 1); | |
3150 | } else { | |
3151 | RAMBlock *block; | |
3152 | ||
3153 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
3154 | if (addr - block->offset < block->length) { | |
3155 | if (addr - block->offset + *size > block->length) | |
3156 | *size = block->length - addr + block->offset; | |
3157 | return block->host + (addr - block->offset); | |
3158 | } | |
3159 | } | |
3160 | ||
3161 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); | |
3162 | abort(); | |
3163 | } | |
3164 | } | |
3165 | ||
3166 | void qemu_put_ram_ptr(void *addr) | |
3167 | { | |
3168 | trace_qemu_put_ram_ptr(addr); | |
3169 | } | |
3170 | ||
3171 | int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) | |
3172 | { | |
3173 | RAMBlock *block; | |
3174 | uint8_t *host = ptr; | |
3175 | ||
3176 | if (xen_enabled()) { | |
3177 | *ram_addr = xen_ram_addr_from_mapcache(ptr); | |
3178 | return 0; | |
3179 | } | |
3180 | ||
3181 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
3182 | /* This case append when the block is not mapped. */ | |
3183 | if (block->host == NULL) { | |
3184 | continue; | |
3185 | } | |
3186 | if (host - block->host < block->length) { | |
3187 | *ram_addr = block->offset + (host - block->host); | |
3188 | return 0; | |
3189 | } | |
3190 | } | |
3191 | ||
3192 | return -1; | |
3193 | } | |
3194 | ||
3195 | /* Some of the softmmu routines need to translate from a host pointer | |
3196 | (typically a TLB entry) back to a ram offset. */ | |
3197 | ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr) | |
3198 | { | |
3199 | ram_addr_t ram_addr; | |
3200 | ||
3201 | if (qemu_ram_addr_from_host(ptr, &ram_addr)) { | |
3202 | fprintf(stderr, "Bad ram pointer %p\n", ptr); | |
3203 | abort(); | |
3204 | } | |
3205 | return ram_addr; | |
3206 | } | |
3207 | ||
3208 | static uint64_t unassigned_mem_read(void *opaque, target_phys_addr_t addr, | |
3209 | unsigned size) | |
3210 | { | |
3211 | #ifdef DEBUG_UNASSIGNED | |
3212 | printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); | |
3213 | #endif | |
3214 | #if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE) | |
3215 | cpu_unassigned_access(cpu_single_env, addr, 0, 0, 0, size); | |
3216 | #endif | |
3217 | return 0; | |
3218 | } | |
3219 | ||
3220 | static void unassigned_mem_write(void *opaque, target_phys_addr_t addr, | |
3221 | uint64_t val, unsigned size) | |
3222 | { | |
3223 | #ifdef DEBUG_UNASSIGNED | |
3224 | printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val); | |
3225 | #endif | |
3226 | #if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE) | |
3227 | cpu_unassigned_access(cpu_single_env, addr, 1, 0, 0, size); | |
3228 | #endif | |
3229 | } | |
3230 | ||
3231 | static const MemoryRegionOps unassigned_mem_ops = { | |
3232 | .read = unassigned_mem_read, | |
3233 | .write = unassigned_mem_write, | |
3234 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3235 | }; | |
3236 | ||
3237 | static uint64_t error_mem_read(void *opaque, target_phys_addr_t addr, | |
3238 | unsigned size) | |
3239 | { | |
3240 | abort(); | |
3241 | } | |
3242 | ||
3243 | static void error_mem_write(void *opaque, target_phys_addr_t addr, | |
3244 | uint64_t value, unsigned size) | |
3245 | { | |
3246 | abort(); | |
3247 | } | |
3248 | ||
3249 | static const MemoryRegionOps error_mem_ops = { | |
3250 | .read = error_mem_read, | |
3251 | .write = error_mem_write, | |
3252 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3253 | }; | |
3254 | ||
3255 | static const MemoryRegionOps rom_mem_ops = { | |
3256 | .read = error_mem_read, | |
3257 | .write = unassigned_mem_write, | |
3258 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3259 | }; | |
3260 | ||
3261 | static void notdirty_mem_write(void *opaque, target_phys_addr_t ram_addr, | |
3262 | uint64_t val, unsigned size) | |
3263 | { | |
3264 | int dirty_flags; | |
3265 | dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr); | |
3266 | if (!(dirty_flags & CODE_DIRTY_FLAG)) { | |
3267 | #if !defined(CONFIG_USER_ONLY) | |
3268 | tb_invalidate_phys_page_fast(ram_addr, size); | |
3269 | dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr); | |
3270 | #endif | |
3271 | } | |
3272 | switch (size) { | |
3273 | case 1: | |
3274 | stb_p(qemu_get_ram_ptr(ram_addr), val); | |
3275 | break; | |
3276 | case 2: | |
3277 | stw_p(qemu_get_ram_ptr(ram_addr), val); | |
3278 | break; | |
3279 | case 4: | |
3280 | stl_p(qemu_get_ram_ptr(ram_addr), val); | |
3281 | break; | |
3282 | default: | |
3283 | abort(); | |
3284 | } | |
3285 | dirty_flags |= (0xff & ~CODE_DIRTY_FLAG); | |
3286 | cpu_physical_memory_set_dirty_flags(ram_addr, dirty_flags); | |
3287 | /* we remove the notdirty callback only if the code has been | |
3288 | flushed */ | |
3289 | if (dirty_flags == 0xff) | |
3290 | tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); | |
3291 | } | |
3292 | ||
3293 | static const MemoryRegionOps notdirty_mem_ops = { | |
3294 | .read = error_mem_read, | |
3295 | .write = notdirty_mem_write, | |
3296 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3297 | }; | |
3298 | ||
3299 | /* Generate a debug exception if a watchpoint has been hit. */ | |
3300 | static void check_watchpoint(int offset, int len_mask, int flags) | |
3301 | { | |
3302 | CPUState *env = cpu_single_env; | |
3303 | target_ulong pc, cs_base; | |
3304 | TranslationBlock *tb; | |
3305 | target_ulong vaddr; | |
3306 | CPUWatchpoint *wp; | |
3307 | int cpu_flags; | |
3308 | ||
3309 | if (env->watchpoint_hit) { | |
3310 | /* We re-entered the check after replacing the TB. Now raise | |
3311 | * the debug interrupt so that is will trigger after the | |
3312 | * current instruction. */ | |
3313 | cpu_interrupt(env, CPU_INTERRUPT_DEBUG); | |
3314 | return; | |
3315 | } | |
3316 | vaddr = (env->mem_io_vaddr & TARGET_PAGE_MASK) + offset; | |
3317 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
3318 | if ((vaddr == (wp->vaddr & len_mask) || | |
3319 | (vaddr & wp->len_mask) == wp->vaddr) && (wp->flags & flags)) { | |
3320 | wp->flags |= BP_WATCHPOINT_HIT; | |
3321 | if (!env->watchpoint_hit) { | |
3322 | env->watchpoint_hit = wp; | |
3323 | tb = tb_find_pc(env->mem_io_pc); | |
3324 | if (!tb) { | |
3325 | cpu_abort(env, "check_watchpoint: could not find TB for " | |
3326 | "pc=%p", (void *)env->mem_io_pc); | |
3327 | } | |
3328 | cpu_restore_state(tb, env, env->mem_io_pc); | |
3329 | tb_phys_invalidate(tb, -1); | |
3330 | if (wp->flags & BP_STOP_BEFORE_ACCESS) { | |
3331 | env->exception_index = EXCP_DEBUG; | |
3332 | cpu_loop_exit(env); | |
3333 | } else { | |
3334 | cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags); | |
3335 | tb_gen_code(env, pc, cs_base, cpu_flags, 1); | |
3336 | cpu_resume_from_signal(env, NULL); | |
3337 | } | |
3338 | } | |
3339 | } else { | |
3340 | wp->flags &= ~BP_WATCHPOINT_HIT; | |
3341 | } | |
3342 | } | |
3343 | } | |
3344 | ||
3345 | /* Watchpoint access routines. Watchpoints are inserted using TLB tricks, | |
3346 | so these check for a hit then pass through to the normal out-of-line | |
3347 | phys routines. */ | |
3348 | static uint64_t watch_mem_read(void *opaque, target_phys_addr_t addr, | |
3349 | unsigned size) | |
3350 | { | |
3351 | check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_READ); | |
3352 | switch (size) { | |
3353 | case 1: return ldub_phys(addr); | |
3354 | case 2: return lduw_phys(addr); | |
3355 | case 4: return ldl_phys(addr); | |
3356 | default: abort(); | |
3357 | } | |
3358 | } | |
3359 | ||
3360 | static void watch_mem_write(void *opaque, target_phys_addr_t addr, | |
3361 | uint64_t val, unsigned size) | |
3362 | { | |
3363 | check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_WRITE); | |
3364 | switch (size) { | |
3365 | case 1: | |
3366 | stb_phys(addr, val); | |
3367 | break; | |
3368 | case 2: | |
3369 | stw_phys(addr, val); | |
3370 | break; | |
3371 | case 4: | |
3372 | stl_phys(addr, val); | |
3373 | break; | |
3374 | default: abort(); | |
3375 | } | |
3376 | } | |
3377 | ||
3378 | static const MemoryRegionOps watch_mem_ops = { | |
3379 | .read = watch_mem_read, | |
3380 | .write = watch_mem_write, | |
3381 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3382 | }; | |
3383 | ||
3384 | static uint64_t subpage_read(void *opaque, target_phys_addr_t addr, | |
3385 | unsigned len) | |
3386 | { | |
3387 | subpage_t *mmio = opaque; | |
3388 | unsigned int idx = SUBPAGE_IDX(addr); | |
3389 | MemoryRegionSection *section; | |
3390 | #if defined(DEBUG_SUBPAGE) | |
3391 | printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__, | |
3392 | mmio, len, addr, idx); | |
3393 | #endif | |
3394 | ||
3395 | section = &phys_sections[mmio->sub_section[idx]]; | |
3396 | addr += mmio->base; | |
3397 | addr -= section->offset_within_address_space; | |
3398 | addr += section->offset_within_region; | |
3399 | return io_mem_read(section->mr->ram_addr, addr, len); | |
3400 | } | |
3401 | ||
3402 | static void subpage_write(void *opaque, target_phys_addr_t addr, | |
3403 | uint64_t value, unsigned len) | |
3404 | { | |
3405 | subpage_t *mmio = opaque; | |
3406 | unsigned int idx = SUBPAGE_IDX(addr); | |
3407 | MemoryRegionSection *section; | |
3408 | #if defined(DEBUG_SUBPAGE) | |
3409 | printf("%s: subpage %p len %d addr " TARGET_FMT_plx | |
3410 | " idx %d value %"PRIx64"\n", | |
3411 | __func__, mmio, len, addr, idx, value); | |
3412 | #endif | |
3413 | ||
3414 | section = &phys_sections[mmio->sub_section[idx]]; | |
3415 | addr += mmio->base; | |
3416 | addr -= section->offset_within_address_space; | |
3417 | addr += section->offset_within_region; | |
3418 | io_mem_write(section->mr->ram_addr, addr, value, len); | |
3419 | } | |
3420 | ||
3421 | static const MemoryRegionOps subpage_ops = { | |
3422 | .read = subpage_read, | |
3423 | .write = subpage_write, | |
3424 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3425 | }; | |
3426 | ||
3427 | static uint64_t subpage_ram_read(void *opaque, target_phys_addr_t addr, | |
3428 | unsigned size) | |
3429 | { | |
3430 | ram_addr_t raddr = addr; | |
3431 | void *ptr = qemu_get_ram_ptr(raddr); | |
3432 | switch (size) { | |
3433 | case 1: return ldub_p(ptr); | |
3434 | case 2: return lduw_p(ptr); | |
3435 | case 4: return ldl_p(ptr); | |
3436 | default: abort(); | |
3437 | } | |
3438 | } | |
3439 | ||
3440 | static void subpage_ram_write(void *opaque, target_phys_addr_t addr, | |
3441 | uint64_t value, unsigned size) | |
3442 | { | |
3443 | ram_addr_t raddr = addr; | |
3444 | void *ptr = qemu_get_ram_ptr(raddr); | |
3445 | switch (size) { | |
3446 | case 1: return stb_p(ptr, value); | |
3447 | case 2: return stw_p(ptr, value); | |
3448 | case 4: return stl_p(ptr, value); | |
3449 | default: abort(); | |
3450 | } | |
3451 | } | |
3452 | ||
3453 | static const MemoryRegionOps subpage_ram_ops = { | |
3454 | .read = subpage_ram_read, | |
3455 | .write = subpage_ram_write, | |
3456 | .endianness = DEVICE_NATIVE_ENDIAN, | |
3457 | }; | |
3458 | ||
3459 | static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, | |
3460 | uint16_t section) | |
3461 | { | |
3462 | int idx, eidx; | |
3463 | ||
3464 | if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE) | |
3465 | return -1; | |
3466 | idx = SUBPAGE_IDX(start); | |
3467 | eidx = SUBPAGE_IDX(end); | |
3468 | #if defined(DEBUG_SUBPAGE) | |
3469 | printf("%s: %p start %08x end %08x idx %08x eidx %08x mem %ld\n", __func__, | |
3470 | mmio, start, end, idx, eidx, memory); | |
3471 | #endif | |
3472 | if (memory_region_is_ram(phys_sections[section].mr)) { | |
3473 | MemoryRegionSection new_section = phys_sections[section]; | |
3474 | new_section.mr = &io_mem_subpage_ram; | |
3475 | section = phys_section_add(&new_section); | |
3476 | } | |
3477 | for (; idx <= eidx; idx++) { | |
3478 | mmio->sub_section[idx] = section; | |
3479 | } | |
3480 | ||
3481 | return 0; | |
3482 | } | |
3483 | ||
3484 | static subpage_t *subpage_init(target_phys_addr_t base) | |
3485 | { | |
3486 | subpage_t *mmio; | |
3487 | ||
3488 | mmio = g_malloc0(sizeof(subpage_t)); | |
3489 | ||
3490 | mmio->base = base; | |
3491 | memory_region_init_io(&mmio->iomem, &subpage_ops, mmio, | |
3492 | "subpage", TARGET_PAGE_SIZE); | |
3493 | mmio->iomem.subpage = true; | |
3494 | #if defined(DEBUG_SUBPAGE) | |
3495 | printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__, | |
3496 | mmio, base, TARGET_PAGE_SIZE, subpage_memory); | |
3497 | #endif | |
3498 | subpage_register(mmio, 0, TARGET_PAGE_SIZE-1, phys_section_unassigned); | |
3499 | ||
3500 | return mmio; | |
3501 | } | |
3502 | ||
3503 | static int get_free_io_mem_idx(void) | |
3504 | { | |
3505 | int i; | |
3506 | ||
3507 | for (i = 0; i<IO_MEM_NB_ENTRIES; i++) | |
3508 | if (!io_mem_used[i]) { | |
3509 | io_mem_used[i] = 1; | |
3510 | return i; | |
3511 | } | |
3512 | fprintf(stderr, "RAN out out io_mem_idx, max %d !\n", IO_MEM_NB_ENTRIES); | |
3513 | return -1; | |
3514 | } | |
3515 | ||
3516 | /* mem_read and mem_write are arrays of functions containing the | |
3517 | function to access byte (index 0), word (index 1) and dword (index | |
3518 | 2). Functions can be omitted with a NULL function pointer. | |
3519 | If io_index is non zero, the corresponding io zone is | |
3520 | modified. If it is zero, a new io zone is allocated. The return | |
3521 | value can be used with cpu_register_physical_memory(). (-1) is | |
3522 | returned if error. */ | |
3523 | static int cpu_register_io_memory_fixed(int io_index, MemoryRegion *mr) | |
3524 | { | |
3525 | if (io_index <= 0) { | |
3526 | io_index = get_free_io_mem_idx(); | |
3527 | if (io_index == -1) | |
3528 | return io_index; | |
3529 | } else { | |
3530 | if (io_index >= IO_MEM_NB_ENTRIES) | |
3531 | return -1; | |
3532 | } | |
3533 | ||
3534 | io_mem_region[io_index] = mr; | |
3535 | ||
3536 | return io_index; | |
3537 | } | |
3538 | ||
3539 | int cpu_register_io_memory(MemoryRegion *mr) | |
3540 | { | |
3541 | return cpu_register_io_memory_fixed(0, mr); | |
3542 | } | |
3543 | ||
3544 | void cpu_unregister_io_memory(int io_index) | |
3545 | { | |
3546 | io_mem_region[io_index] = NULL; | |
3547 | io_mem_used[io_index] = 0; | |
3548 | } | |
3549 | ||
3550 | static uint16_t dummy_section(MemoryRegion *mr) | |
3551 | { | |
3552 | MemoryRegionSection section = { | |
3553 | .mr = mr, | |
3554 | .offset_within_address_space = 0, | |
3555 | .offset_within_region = 0, | |
3556 | .size = UINT64_MAX, | |
3557 | }; | |
3558 | ||
3559 | return phys_section_add(§ion); | |
3560 | } | |
3561 | ||
3562 | static void io_mem_init(void) | |
3563 | { | |
3564 | int i; | |
3565 | ||
3566 | /* Must be first: */ | |
3567 | memory_region_init_io(&io_mem_ram, &error_mem_ops, NULL, "ram", UINT64_MAX); | |
3568 | assert(io_mem_ram.ram_addr == 0); | |
3569 | memory_region_init_io(&io_mem_rom, &rom_mem_ops, NULL, "rom", UINT64_MAX); | |
3570 | memory_region_init_io(&io_mem_unassigned, &unassigned_mem_ops, NULL, | |
3571 | "unassigned", UINT64_MAX); | |
3572 | memory_region_init_io(&io_mem_notdirty, ¬dirty_mem_ops, NULL, | |
3573 | "notdirty", UINT64_MAX); | |
3574 | memory_region_init_io(&io_mem_subpage_ram, &subpage_ram_ops, NULL, | |
3575 | "subpage-ram", UINT64_MAX); | |
3576 | for (i=0; i<5; i++) | |
3577 | io_mem_used[i] = 1; | |
3578 | ||
3579 | memory_region_init_io(&io_mem_watch, &watch_mem_ops, NULL, | |
3580 | "watch", UINT64_MAX); | |
3581 | } | |
3582 | ||
3583 | static void core_begin(MemoryListener *listener) | |
3584 | { | |
3585 | destroy_all_mappings(); | |
3586 | phys_sections_clear(); | |
3587 | phys_map.ptr = PHYS_MAP_NODE_NIL; | |
3588 | phys_section_unassigned = dummy_section(&io_mem_unassigned); | |
3589 | } | |
3590 | ||
3591 | static void core_commit(MemoryListener *listener) | |
3592 | { | |
3593 | CPUState *env; | |
3594 | ||
3595 | /* since each CPU stores ram addresses in its TLB cache, we must | |
3596 | reset the modified entries */ | |
3597 | /* XXX: slow ! */ | |
3598 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
3599 | tlb_flush(env, 1); | |
3600 | } | |
3601 | } | |
3602 | ||
3603 | static void core_region_add(MemoryListener *listener, | |
3604 | MemoryRegionSection *section) | |
3605 | { | |
3606 | cpu_register_physical_memory_log(section, section->readonly); | |
3607 | } | |
3608 | ||
3609 | static void core_region_del(MemoryListener *listener, | |
3610 | MemoryRegionSection *section) | |
3611 | { | |
3612 | } | |
3613 | ||
3614 | static void core_region_nop(MemoryListener *listener, | |
3615 | MemoryRegionSection *section) | |
3616 | { | |
3617 | cpu_register_physical_memory_log(section, section->readonly); | |
3618 | } | |
3619 | ||
3620 | static void core_log_start(MemoryListener *listener, | |
3621 | MemoryRegionSection *section) | |
3622 | { | |
3623 | } | |
3624 | ||
3625 | static void core_log_stop(MemoryListener *listener, | |
3626 | MemoryRegionSection *section) | |
3627 | { | |
3628 | } | |
3629 | ||
3630 | static void core_log_sync(MemoryListener *listener, | |
3631 | MemoryRegionSection *section) | |
3632 | { | |
3633 | } | |
3634 | ||
3635 | static void core_log_global_start(MemoryListener *listener) | |
3636 | { | |
3637 | cpu_physical_memory_set_dirty_tracking(1); | |
3638 | } | |
3639 | ||
3640 | static void core_log_global_stop(MemoryListener *listener) | |
3641 | { | |
3642 | cpu_physical_memory_set_dirty_tracking(0); | |
3643 | } | |
3644 | ||
3645 | static void core_eventfd_add(MemoryListener *listener, | |
3646 | MemoryRegionSection *section, | |
3647 | bool match_data, uint64_t data, int fd) | |
3648 | { | |
3649 | } | |
3650 | ||
3651 | static void core_eventfd_del(MemoryListener *listener, | |
3652 | MemoryRegionSection *section, | |
3653 | bool match_data, uint64_t data, int fd) | |
3654 | { | |
3655 | } | |
3656 | ||
3657 | static void io_begin(MemoryListener *listener) | |
3658 | { | |
3659 | } | |
3660 | ||
3661 | static void io_commit(MemoryListener *listener) | |
3662 | { | |
3663 | } | |
3664 | ||
3665 | static void io_region_add(MemoryListener *listener, | |
3666 | MemoryRegionSection *section) | |
3667 | { | |
3668 | MemoryRegionIORange *mrio = g_new(MemoryRegionIORange, 1); | |
3669 | ||
3670 | mrio->mr = section->mr; | |
3671 | mrio->offset = section->offset_within_region; | |
3672 | iorange_init(&mrio->iorange, &memory_region_iorange_ops, | |
3673 | section->offset_within_address_space, section->size); | |
3674 | ioport_register(&mrio->iorange); | |
3675 | } | |
3676 | ||
3677 | static void io_region_del(MemoryListener *listener, | |
3678 | MemoryRegionSection *section) | |
3679 | { | |
3680 | isa_unassign_ioport(section->offset_within_address_space, section->size); | |
3681 | } | |
3682 | ||
3683 | static void io_region_nop(MemoryListener *listener, | |
3684 | MemoryRegionSection *section) | |
3685 | { | |
3686 | } | |
3687 | ||
3688 | static void io_log_start(MemoryListener *listener, | |
3689 | MemoryRegionSection *section) | |
3690 | { | |
3691 | } | |
3692 | ||
3693 | static void io_log_stop(MemoryListener *listener, | |
3694 | MemoryRegionSection *section) | |
3695 | { | |
3696 | } | |
3697 | ||
3698 | static void io_log_sync(MemoryListener *listener, | |
3699 | MemoryRegionSection *section) | |
3700 | { | |
3701 | } | |
3702 | ||
3703 | static void io_log_global_start(MemoryListener *listener) | |
3704 | { | |
3705 | } | |
3706 | ||
3707 | static void io_log_global_stop(MemoryListener *listener) | |
3708 | { | |
3709 | } | |
3710 | ||
3711 | static void io_eventfd_add(MemoryListener *listener, | |
3712 | MemoryRegionSection *section, | |
3713 | bool match_data, uint64_t data, int fd) | |
3714 | { | |
3715 | } | |
3716 | ||
3717 | static void io_eventfd_del(MemoryListener *listener, | |
3718 | MemoryRegionSection *section, | |
3719 | bool match_data, uint64_t data, int fd) | |
3720 | { | |
3721 | } | |
3722 | ||
3723 | static MemoryListener core_memory_listener = { | |
3724 | .begin = core_begin, | |
3725 | .commit = core_commit, | |
3726 | .region_add = core_region_add, | |
3727 | .region_del = core_region_del, | |
3728 | .region_nop = core_region_nop, | |
3729 | .log_start = core_log_start, | |
3730 | .log_stop = core_log_stop, | |
3731 | .log_sync = core_log_sync, | |
3732 | .log_global_start = core_log_global_start, | |
3733 | .log_global_stop = core_log_global_stop, | |
3734 | .eventfd_add = core_eventfd_add, | |
3735 | .eventfd_del = core_eventfd_del, | |
3736 | .priority = 0, | |
3737 | }; | |
3738 | ||
3739 | static MemoryListener io_memory_listener = { | |
3740 | .begin = io_begin, | |
3741 | .commit = io_commit, | |
3742 | .region_add = io_region_add, | |
3743 | .region_del = io_region_del, | |
3744 | .region_nop = io_region_nop, | |
3745 | .log_start = io_log_start, | |
3746 | .log_stop = io_log_stop, | |
3747 | .log_sync = io_log_sync, | |
3748 | .log_global_start = io_log_global_start, | |
3749 | .log_global_stop = io_log_global_stop, | |
3750 | .eventfd_add = io_eventfd_add, | |
3751 | .eventfd_del = io_eventfd_del, | |
3752 | .priority = 0, | |
3753 | }; | |
3754 | ||
3755 | static void memory_map_init(void) | |
3756 | { | |
3757 | system_memory = g_malloc(sizeof(*system_memory)); | |
3758 | memory_region_init(system_memory, "system", INT64_MAX); | |
3759 | set_system_memory_map(system_memory); | |
3760 | ||
3761 | system_io = g_malloc(sizeof(*system_io)); | |
3762 | memory_region_init(system_io, "io", 65536); | |
3763 | set_system_io_map(system_io); | |
3764 | ||
3765 | memory_listener_register(&core_memory_listener, system_memory); | |
3766 | memory_listener_register(&io_memory_listener, system_io); | |
3767 | } | |
3768 | ||
3769 | MemoryRegion *get_system_memory(void) | |
3770 | { | |
3771 | return system_memory; | |
3772 | } | |
3773 | ||
3774 | MemoryRegion *get_system_io(void) | |
3775 | { | |
3776 | return system_io; | |
3777 | } | |
3778 | ||
3779 | #endif /* !defined(CONFIG_USER_ONLY) */ | |
3780 | ||
3781 | /* physical memory access (slow version, mainly for debug) */ | |
3782 | #if defined(CONFIG_USER_ONLY) | |
3783 | int cpu_memory_rw_debug(CPUState *env, target_ulong addr, | |
3784 | uint8_t *buf, int len, int is_write) | |
3785 | { | |
3786 | int l, flags; | |
3787 | target_ulong page; | |
3788 | void * p; | |
3789 | ||
3790 | while (len > 0) { | |
3791 | page = addr & TARGET_PAGE_MASK; | |
3792 | l = (page + TARGET_PAGE_SIZE) - addr; | |
3793 | if (l > len) | |
3794 | l = len; | |
3795 | flags = page_get_flags(page); | |
3796 | if (!(flags & PAGE_VALID)) | |
3797 | return -1; | |
3798 | if (is_write) { | |
3799 | if (!(flags & PAGE_WRITE)) | |
3800 | return -1; | |
3801 | /* XXX: this code should not depend on lock_user */ | |
3802 | if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) | |
3803 | return -1; | |
3804 | memcpy(p, buf, l); | |
3805 | unlock_user(p, addr, l); | |
3806 | } else { | |
3807 | if (!(flags & PAGE_READ)) | |
3808 | return -1; | |
3809 | /* XXX: this code should not depend on lock_user */ | |
3810 | if (!(p = lock_user(VERIFY_READ, addr, l, 1))) | |
3811 | return -1; | |
3812 | memcpy(buf, p, l); | |
3813 | unlock_user(p, addr, 0); | |
3814 | } | |
3815 | len -= l; | |
3816 | buf += l; | |
3817 | addr += l; | |
3818 | } | |
3819 | return 0; | |
3820 | } | |
3821 | ||
3822 | #else | |
3823 | void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf, | |
3824 | int len, int is_write) | |
3825 | { | |
3826 | int l, io_index; | |
3827 | uint8_t *ptr; | |
3828 | uint32_t val; | |
3829 | target_phys_addr_t page; | |
3830 | MemoryRegionSection *section; | |
3831 | ||
3832 | while (len > 0) { | |
3833 | page = addr & TARGET_PAGE_MASK; | |
3834 | l = (page + TARGET_PAGE_SIZE) - addr; | |
3835 | if (l > len) | |
3836 | l = len; | |
3837 | section = phys_page_find(page >> TARGET_PAGE_BITS); | |
3838 | ||
3839 | if (is_write) { | |
3840 | if (!memory_region_is_ram(section->mr)) { | |
3841 | target_phys_addr_t addr1; | |
3842 | io_index = memory_region_get_ram_addr(section->mr) | |
3843 | & (IO_MEM_NB_ENTRIES - 1); | |
3844 | addr1 = section_addr(section, addr); | |
3845 | /* XXX: could force cpu_single_env to NULL to avoid | |
3846 | potential bugs */ | |
3847 | if (l >= 4 && ((addr1 & 3) == 0)) { | |
3848 | /* 32 bit write access */ | |
3849 | val = ldl_p(buf); | |
3850 | io_mem_write(io_index, addr1, val, 4); | |
3851 | l = 4; | |
3852 | } else if (l >= 2 && ((addr1 & 1) == 0)) { | |
3853 | /* 16 bit write access */ | |
3854 | val = lduw_p(buf); | |
3855 | io_mem_write(io_index, addr1, val, 2); | |
3856 | l = 2; | |
3857 | } else { | |
3858 | /* 8 bit write access */ | |
3859 | val = ldub_p(buf); | |
3860 | io_mem_write(io_index, addr1, val, 1); | |
3861 | l = 1; | |
3862 | } | |
3863 | } else if (!section->readonly) { | |
3864 | ram_addr_t addr1; | |
3865 | addr1 = memory_region_get_ram_addr(section->mr) | |
3866 | + section_addr(section, addr); | |
3867 | /* RAM case */ | |
3868 | ptr = qemu_get_ram_ptr(addr1); | |
3869 | memcpy(ptr, buf, l); | |
3870 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
3871 | /* invalidate code */ | |
3872 | tb_invalidate_phys_page_range(addr1, addr1 + l, 0); | |
3873 | /* set dirty bit */ | |
3874 | cpu_physical_memory_set_dirty_flags( | |
3875 | addr1, (0xff & ~CODE_DIRTY_FLAG)); | |
3876 | } | |
3877 | qemu_put_ram_ptr(ptr); | |
3878 | } | |
3879 | } else { | |
3880 | if (!is_ram_rom_romd(section)) { | |
3881 | target_phys_addr_t addr1; | |
3882 | /* I/O case */ | |
3883 | io_index = memory_region_get_ram_addr(section->mr) | |
3884 | & (IO_MEM_NB_ENTRIES - 1); | |
3885 | addr1 = section_addr(section, addr); | |
3886 | if (l >= 4 && ((addr1 & 3) == 0)) { | |
3887 | /* 32 bit read access */ | |
3888 | val = io_mem_read(io_index, addr1, 4); | |
3889 | stl_p(buf, val); | |
3890 | l = 4; | |
3891 | } else if (l >= 2 && ((addr1 & 1) == 0)) { | |
3892 | /* 16 bit read access */ | |
3893 | val = io_mem_read(io_index, addr1, 2); | |
3894 | stw_p(buf, val); | |
3895 | l = 2; | |
3896 | } else { | |
3897 | /* 8 bit read access */ | |
3898 | val = io_mem_read(io_index, addr1, 1); | |
3899 | stb_p(buf, val); | |
3900 | l = 1; | |
3901 | } | |
3902 | } else { | |
3903 | /* RAM case */ | |
3904 | ptr = qemu_get_ram_ptr(section->mr->ram_addr) | |
3905 | + section_addr(section, addr); | |
3906 | memcpy(buf, ptr, l); | |
3907 | qemu_put_ram_ptr(ptr); | |
3908 | } | |
3909 | } | |
3910 | len -= l; | |
3911 | buf += l; | |
3912 | addr += l; | |
3913 | } | |
3914 | } | |
3915 | ||
3916 | /* used for ROM loading : can write in RAM and ROM */ | |
3917 | void cpu_physical_memory_write_rom(target_phys_addr_t addr, | |
3918 | const uint8_t *buf, int len) | |
3919 | { | |
3920 | int l; | |
3921 | uint8_t *ptr; | |
3922 | target_phys_addr_t page; | |
3923 | MemoryRegionSection *section; | |
3924 | ||
3925 | while (len > 0) { | |
3926 | page = addr & TARGET_PAGE_MASK; | |
3927 | l = (page + TARGET_PAGE_SIZE) - addr; | |
3928 | if (l > len) | |
3929 | l = len; | |
3930 | section = phys_page_find(page >> TARGET_PAGE_BITS); | |
3931 | ||
3932 | if (!is_ram_rom_romd(section)) { | |
3933 | /* do nothing */ | |
3934 | } else { | |
3935 | unsigned long addr1; | |
3936 | addr1 = memory_region_get_ram_addr(section->mr) | |
3937 | + section_addr(section, addr); | |
3938 | /* ROM/RAM case */ | |
3939 | ptr = qemu_get_ram_ptr(addr1); | |
3940 | memcpy(ptr, buf, l); | |
3941 | qemu_put_ram_ptr(ptr); | |
3942 | } | |
3943 | len -= l; | |
3944 | buf += l; | |
3945 | addr += l; | |
3946 | } | |
3947 | } | |
3948 | ||
3949 | typedef struct { | |
3950 | void *buffer; | |
3951 | target_phys_addr_t addr; | |
3952 | target_phys_addr_t len; | |
3953 | } BounceBuffer; | |
3954 | ||
3955 | static BounceBuffer bounce; | |
3956 | ||
3957 | typedef struct MapClient { | |
3958 | void *opaque; | |
3959 | void (*callback)(void *opaque); | |
3960 | QLIST_ENTRY(MapClient) link; | |
3961 | } MapClient; | |
3962 | ||
3963 | static QLIST_HEAD(map_client_list, MapClient) map_client_list | |
3964 | = QLIST_HEAD_INITIALIZER(map_client_list); | |
3965 | ||
3966 | void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque)) | |
3967 | { | |
3968 | MapClient *client = g_malloc(sizeof(*client)); | |
3969 | ||
3970 | client->opaque = opaque; | |
3971 | client->callback = callback; | |
3972 | QLIST_INSERT_HEAD(&map_client_list, client, link); | |
3973 | return client; | |
3974 | } | |
3975 | ||
3976 | void cpu_unregister_map_client(void *_client) | |
3977 | { | |
3978 | MapClient *client = (MapClient *)_client; | |
3979 | ||
3980 | QLIST_REMOVE(client, link); | |
3981 | g_free(client); | |
3982 | } | |
3983 | ||
3984 | static void cpu_notify_map_clients(void) | |
3985 | { | |
3986 | MapClient *client; | |
3987 | ||
3988 | while (!QLIST_EMPTY(&map_client_list)) { | |
3989 | client = QLIST_FIRST(&map_client_list); | |
3990 | client->callback(client->opaque); | |
3991 | cpu_unregister_map_client(client); | |
3992 | } | |
3993 | } | |
3994 | ||
3995 | /* Map a physical memory region into a host virtual address. | |
3996 | * May map a subset of the requested range, given by and returned in *plen. | |
3997 | * May return NULL if resources needed to perform the mapping are exhausted. | |
3998 | * Use only for reads OR writes - not for read-modify-write operations. | |
3999 | * Use cpu_register_map_client() to know when retrying the map operation is | |
4000 | * likely to succeed. | |
4001 | */ | |
4002 | void *cpu_physical_memory_map(target_phys_addr_t addr, | |
4003 | target_phys_addr_t *plen, | |
4004 | int is_write) | |
4005 | { | |
4006 | target_phys_addr_t len = *plen; | |
4007 | target_phys_addr_t todo = 0; | |
4008 | int l; | |
4009 | target_phys_addr_t page; | |
4010 | MemoryRegionSection *section; | |
4011 | ram_addr_t raddr = RAM_ADDR_MAX; | |
4012 | ram_addr_t rlen; | |
4013 | void *ret; | |
4014 | ||
4015 | while (len > 0) { | |
4016 | page = addr & TARGET_PAGE_MASK; | |
4017 | l = (page + TARGET_PAGE_SIZE) - addr; | |
4018 | if (l > len) | |
4019 | l = len; | |
4020 | section = phys_page_find(page >> TARGET_PAGE_BITS); | |
4021 | ||
4022 | if (!(memory_region_is_ram(section->mr) && !section->readonly)) { | |
4023 | if (todo || bounce.buffer) { | |
4024 | break; | |
4025 | } | |
4026 | bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, TARGET_PAGE_SIZE); | |
4027 | bounce.addr = addr; | |
4028 | bounce.len = l; | |
4029 | if (!is_write) { | |
4030 | cpu_physical_memory_read(addr, bounce.buffer, l); | |
4031 | } | |
4032 | ||
4033 | *plen = l; | |
4034 | return bounce.buffer; | |
4035 | } | |
4036 | if (!todo) { | |
4037 | raddr = memory_region_get_ram_addr(section->mr) | |
4038 | + section_addr(section, addr); | |
4039 | } | |
4040 | ||
4041 | len -= l; | |
4042 | addr += l; | |
4043 | todo += l; | |
4044 | } | |
4045 | rlen = todo; | |
4046 | ret = qemu_ram_ptr_length(raddr, &rlen); | |
4047 | *plen = rlen; | |
4048 | return ret; | |
4049 | } | |
4050 | ||
4051 | /* Unmaps a memory region previously mapped by cpu_physical_memory_map(). | |
4052 | * Will also mark the memory as dirty if is_write == 1. access_len gives | |
4053 | * the amount of memory that was actually read or written by the caller. | |
4054 | */ | |
4055 | void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len, | |
4056 | int is_write, target_phys_addr_t access_len) | |
4057 | { | |
4058 | if (buffer != bounce.buffer) { | |
4059 | if (is_write) { | |
4060 | ram_addr_t addr1 = qemu_ram_addr_from_host_nofail(buffer); | |
4061 | while (access_len) { | |
4062 | unsigned l; | |
4063 | l = TARGET_PAGE_SIZE; | |
4064 | if (l > access_len) | |
4065 | l = access_len; | |
4066 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
4067 | /* invalidate code */ | |
4068 | tb_invalidate_phys_page_range(addr1, addr1 + l, 0); | |
4069 | /* set dirty bit */ | |
4070 | cpu_physical_memory_set_dirty_flags( | |
4071 | addr1, (0xff & ~CODE_DIRTY_FLAG)); | |
4072 | } | |
4073 | addr1 += l; | |
4074 | access_len -= l; | |
4075 | } | |
4076 | } | |
4077 | if (xen_enabled()) { | |
4078 | xen_invalidate_map_cache_entry(buffer); | |
4079 | } | |
4080 | return; | |
4081 | } | |
4082 | if (is_write) { | |
4083 | cpu_physical_memory_write(bounce.addr, bounce.buffer, access_len); | |
4084 | } | |
4085 | qemu_vfree(bounce.buffer); | |
4086 | bounce.buffer = NULL; | |
4087 | cpu_notify_map_clients(); | |
4088 | } | |
4089 | ||
4090 | /* warning: addr must be aligned */ | |
4091 | static inline uint32_t ldl_phys_internal(target_phys_addr_t addr, | |
4092 | enum device_endian endian) | |
4093 | { | |
4094 | int io_index; | |
4095 | uint8_t *ptr; | |
4096 | uint32_t val; | |
4097 | MemoryRegionSection *section; | |
4098 | ||
4099 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4100 | ||
4101 | if (!is_ram_rom_romd(section)) { | |
4102 | /* I/O case */ | |
4103 | io_index = memory_region_get_ram_addr(section->mr) | |
4104 | & (IO_MEM_NB_ENTRIES - 1); | |
4105 | addr = section_addr(section, addr); | |
4106 | val = io_mem_read(io_index, addr, 4); | |
4107 | #if defined(TARGET_WORDS_BIGENDIAN) | |
4108 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
4109 | val = bswap32(val); | |
4110 | } | |
4111 | #else | |
4112 | if (endian == DEVICE_BIG_ENDIAN) { | |
4113 | val = bswap32(val); | |
4114 | } | |
4115 | #endif | |
4116 | } else { | |
4117 | /* RAM case */ | |
4118 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) | |
4119 | & TARGET_PAGE_MASK) | |
4120 | + section_addr(section, addr)); | |
4121 | switch (endian) { | |
4122 | case DEVICE_LITTLE_ENDIAN: | |
4123 | val = ldl_le_p(ptr); | |
4124 | break; | |
4125 | case DEVICE_BIG_ENDIAN: | |
4126 | val = ldl_be_p(ptr); | |
4127 | break; | |
4128 | default: | |
4129 | val = ldl_p(ptr); | |
4130 | break; | |
4131 | } | |
4132 | } | |
4133 | return val; | |
4134 | } | |
4135 | ||
4136 | uint32_t ldl_phys(target_phys_addr_t addr) | |
4137 | { | |
4138 | return ldl_phys_internal(addr, DEVICE_NATIVE_ENDIAN); | |
4139 | } | |
4140 | ||
4141 | uint32_t ldl_le_phys(target_phys_addr_t addr) | |
4142 | { | |
4143 | return ldl_phys_internal(addr, DEVICE_LITTLE_ENDIAN); | |
4144 | } | |
4145 | ||
4146 | uint32_t ldl_be_phys(target_phys_addr_t addr) | |
4147 | { | |
4148 | return ldl_phys_internal(addr, DEVICE_BIG_ENDIAN); | |
4149 | } | |
4150 | ||
4151 | /* warning: addr must be aligned */ | |
4152 | static inline uint64_t ldq_phys_internal(target_phys_addr_t addr, | |
4153 | enum device_endian endian) | |
4154 | { | |
4155 | int io_index; | |
4156 | uint8_t *ptr; | |
4157 | uint64_t val; | |
4158 | MemoryRegionSection *section; | |
4159 | ||
4160 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4161 | ||
4162 | if (!is_ram_rom_romd(section)) { | |
4163 | /* I/O case */ | |
4164 | io_index = memory_region_get_ram_addr(section->mr) | |
4165 | & (IO_MEM_NB_ENTRIES - 1); | |
4166 | addr = section_addr(section, addr); | |
4167 | ||
4168 | /* XXX This is broken when device endian != cpu endian. | |
4169 | Fix and add "endian" variable check */ | |
4170 | #ifdef TARGET_WORDS_BIGENDIAN | |
4171 | val = io_mem_read(io_index, addr, 4) << 32; | |
4172 | val |= io_mem_read(io_index, addr + 4, 4); | |
4173 | #else | |
4174 | val = io_mem_read(io_index, addr, 4); | |
4175 | val |= io_mem_read(io_index, addr + 4, 4) << 32; | |
4176 | #endif | |
4177 | } else { | |
4178 | /* RAM case */ | |
4179 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) | |
4180 | & TARGET_PAGE_MASK) | |
4181 | + section_addr(section, addr)); | |
4182 | switch (endian) { | |
4183 | case DEVICE_LITTLE_ENDIAN: | |
4184 | val = ldq_le_p(ptr); | |
4185 | break; | |
4186 | case DEVICE_BIG_ENDIAN: | |
4187 | val = ldq_be_p(ptr); | |
4188 | break; | |
4189 | default: | |
4190 | val = ldq_p(ptr); | |
4191 | break; | |
4192 | } | |
4193 | } | |
4194 | return val; | |
4195 | } | |
4196 | ||
4197 | uint64_t ldq_phys(target_phys_addr_t addr) | |
4198 | { | |
4199 | return ldq_phys_internal(addr, DEVICE_NATIVE_ENDIAN); | |
4200 | } | |
4201 | ||
4202 | uint64_t ldq_le_phys(target_phys_addr_t addr) | |
4203 | { | |
4204 | return ldq_phys_internal(addr, DEVICE_LITTLE_ENDIAN); | |
4205 | } | |
4206 | ||
4207 | uint64_t ldq_be_phys(target_phys_addr_t addr) | |
4208 | { | |
4209 | return ldq_phys_internal(addr, DEVICE_BIG_ENDIAN); | |
4210 | } | |
4211 | ||
4212 | /* XXX: optimize */ | |
4213 | uint32_t ldub_phys(target_phys_addr_t addr) | |
4214 | { | |
4215 | uint8_t val; | |
4216 | cpu_physical_memory_read(addr, &val, 1); | |
4217 | return val; | |
4218 | } | |
4219 | ||
4220 | /* warning: addr must be aligned */ | |
4221 | static inline uint32_t lduw_phys_internal(target_phys_addr_t addr, | |
4222 | enum device_endian endian) | |
4223 | { | |
4224 | int io_index; | |
4225 | uint8_t *ptr; | |
4226 | uint64_t val; | |
4227 | MemoryRegionSection *section; | |
4228 | ||
4229 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4230 | ||
4231 | if (!is_ram_rom_romd(section)) { | |
4232 | /* I/O case */ | |
4233 | io_index = memory_region_get_ram_addr(section->mr) | |
4234 | & (IO_MEM_NB_ENTRIES - 1); | |
4235 | addr = section_addr(section, addr); | |
4236 | val = io_mem_read(io_index, addr, 2); | |
4237 | #if defined(TARGET_WORDS_BIGENDIAN) | |
4238 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
4239 | val = bswap16(val); | |
4240 | } | |
4241 | #else | |
4242 | if (endian == DEVICE_BIG_ENDIAN) { | |
4243 | val = bswap16(val); | |
4244 | } | |
4245 | #endif | |
4246 | } else { | |
4247 | /* RAM case */ | |
4248 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) | |
4249 | & TARGET_PAGE_MASK) | |
4250 | + section_addr(section, addr)); | |
4251 | switch (endian) { | |
4252 | case DEVICE_LITTLE_ENDIAN: | |
4253 | val = lduw_le_p(ptr); | |
4254 | break; | |
4255 | case DEVICE_BIG_ENDIAN: | |
4256 | val = lduw_be_p(ptr); | |
4257 | break; | |
4258 | default: | |
4259 | val = lduw_p(ptr); | |
4260 | break; | |
4261 | } | |
4262 | } | |
4263 | return val; | |
4264 | } | |
4265 | ||
4266 | uint32_t lduw_phys(target_phys_addr_t addr) | |
4267 | { | |
4268 | return lduw_phys_internal(addr, DEVICE_NATIVE_ENDIAN); | |
4269 | } | |
4270 | ||
4271 | uint32_t lduw_le_phys(target_phys_addr_t addr) | |
4272 | { | |
4273 | return lduw_phys_internal(addr, DEVICE_LITTLE_ENDIAN); | |
4274 | } | |
4275 | ||
4276 | uint32_t lduw_be_phys(target_phys_addr_t addr) | |
4277 | { | |
4278 | return lduw_phys_internal(addr, DEVICE_BIG_ENDIAN); | |
4279 | } | |
4280 | ||
4281 | /* warning: addr must be aligned. The ram page is not masked as dirty | |
4282 | and the code inside is not invalidated. It is useful if the dirty | |
4283 | bits are used to track modified PTEs */ | |
4284 | void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val) | |
4285 | { | |
4286 | int io_index; | |
4287 | uint8_t *ptr; | |
4288 | MemoryRegionSection *section; | |
4289 | ||
4290 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4291 | ||
4292 | if (!memory_region_is_ram(section->mr) || section->readonly) { | |
4293 | if (memory_region_is_ram(section->mr)) { | |
4294 | io_index = io_mem_rom.ram_addr; | |
4295 | } else { | |
4296 | io_index = memory_region_get_ram_addr(section->mr); | |
4297 | } | |
4298 | addr = section_addr(section, addr); | |
4299 | io_mem_write(io_index, addr, val, 4); | |
4300 | } else { | |
4301 | unsigned long addr1 = (memory_region_get_ram_addr(section->mr) | |
4302 | & TARGET_PAGE_MASK) | |
4303 | + section_addr(section, addr); | |
4304 | ptr = qemu_get_ram_ptr(addr1); | |
4305 | stl_p(ptr, val); | |
4306 | ||
4307 | if (unlikely(in_migration)) { | |
4308 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
4309 | /* invalidate code */ | |
4310 | tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); | |
4311 | /* set dirty bit */ | |
4312 | cpu_physical_memory_set_dirty_flags( | |
4313 | addr1, (0xff & ~CODE_DIRTY_FLAG)); | |
4314 | } | |
4315 | } | |
4316 | } | |
4317 | } | |
4318 | ||
4319 | void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val) | |
4320 | { | |
4321 | int io_index; | |
4322 | uint8_t *ptr; | |
4323 | MemoryRegionSection *section; | |
4324 | ||
4325 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4326 | ||
4327 | if (!memory_region_is_ram(section->mr) || section->readonly) { | |
4328 | if (memory_region_is_ram(section->mr)) { | |
4329 | io_index = io_mem_rom.ram_addr; | |
4330 | } else { | |
4331 | io_index = memory_region_get_ram_addr(section->mr) | |
4332 | & (IO_MEM_NB_ENTRIES - 1); | |
4333 | } | |
4334 | addr = section_addr(section, addr); | |
4335 | #ifdef TARGET_WORDS_BIGENDIAN | |
4336 | io_mem_write(io_index, addr, val >> 32, 4); | |
4337 | io_mem_write(io_index, addr + 4, (uint32_t)val, 4); | |
4338 | #else | |
4339 | io_mem_write(io_index, addr, (uint32_t)val, 4); | |
4340 | io_mem_write(io_index, addr + 4, val >> 32, 4); | |
4341 | #endif | |
4342 | } else { | |
4343 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) | |
4344 | & TARGET_PAGE_MASK) | |
4345 | + section_addr(section, addr)); | |
4346 | stq_p(ptr, val); | |
4347 | } | |
4348 | } | |
4349 | ||
4350 | /* warning: addr must be aligned */ | |
4351 | static inline void stl_phys_internal(target_phys_addr_t addr, uint32_t val, | |
4352 | enum device_endian endian) | |
4353 | { | |
4354 | int io_index; | |
4355 | uint8_t *ptr; | |
4356 | MemoryRegionSection *section; | |
4357 | ||
4358 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4359 | ||
4360 | if (!memory_region_is_ram(section->mr) || section->readonly) { | |
4361 | if (memory_region_is_ram(section->mr)) { | |
4362 | io_index = io_mem_rom.ram_addr; | |
4363 | } else { | |
4364 | io_index = memory_region_get_ram_addr(section->mr) | |
4365 | & (IO_MEM_NB_ENTRIES - 1); | |
4366 | } | |
4367 | addr = section_addr(section, addr); | |
4368 | #if defined(TARGET_WORDS_BIGENDIAN) | |
4369 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
4370 | val = bswap32(val); | |
4371 | } | |
4372 | #else | |
4373 | if (endian == DEVICE_BIG_ENDIAN) { | |
4374 | val = bswap32(val); | |
4375 | } | |
4376 | #endif | |
4377 | io_mem_write(io_index, addr, val, 4); | |
4378 | } else { | |
4379 | unsigned long addr1; | |
4380 | addr1 = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) | |
4381 | + section_addr(section, addr); | |
4382 | /* RAM case */ | |
4383 | ptr = qemu_get_ram_ptr(addr1); | |
4384 | switch (endian) { | |
4385 | case DEVICE_LITTLE_ENDIAN: | |
4386 | stl_le_p(ptr, val); | |
4387 | break; | |
4388 | case DEVICE_BIG_ENDIAN: | |
4389 | stl_be_p(ptr, val); | |
4390 | break; | |
4391 | default: | |
4392 | stl_p(ptr, val); | |
4393 | break; | |
4394 | } | |
4395 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
4396 | /* invalidate code */ | |
4397 | tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); | |
4398 | /* set dirty bit */ | |
4399 | cpu_physical_memory_set_dirty_flags(addr1, | |
4400 | (0xff & ~CODE_DIRTY_FLAG)); | |
4401 | } | |
4402 | } | |
4403 | } | |
4404 | ||
4405 | void stl_phys(target_phys_addr_t addr, uint32_t val) | |
4406 | { | |
4407 | stl_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN); | |
4408 | } | |
4409 | ||
4410 | void stl_le_phys(target_phys_addr_t addr, uint32_t val) | |
4411 | { | |
4412 | stl_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN); | |
4413 | } | |
4414 | ||
4415 | void stl_be_phys(target_phys_addr_t addr, uint32_t val) | |
4416 | { | |
4417 | stl_phys_internal(addr, val, DEVICE_BIG_ENDIAN); | |
4418 | } | |
4419 | ||
4420 | /* XXX: optimize */ | |
4421 | void stb_phys(target_phys_addr_t addr, uint32_t val) | |
4422 | { | |
4423 | uint8_t v = val; | |
4424 | cpu_physical_memory_write(addr, &v, 1); | |
4425 | } | |
4426 | ||
4427 | /* warning: addr must be aligned */ | |
4428 | static inline void stw_phys_internal(target_phys_addr_t addr, uint32_t val, | |
4429 | enum device_endian endian) | |
4430 | { | |
4431 | int io_index; | |
4432 | uint8_t *ptr; | |
4433 | MemoryRegionSection *section; | |
4434 | ||
4435 | section = phys_page_find(addr >> TARGET_PAGE_BITS); | |
4436 | ||
4437 | if (!memory_region_is_ram(section->mr) || section->readonly) { | |
4438 | if (memory_region_is_ram(section->mr)) { | |
4439 | io_index = io_mem_rom.ram_addr; | |
4440 | } else { | |
4441 | io_index = memory_region_get_ram_addr(section->mr) | |
4442 | & (IO_MEM_NB_ENTRIES - 1); | |
4443 | } | |
4444 | addr = section_addr(section, addr); | |
4445 | #if defined(TARGET_WORDS_BIGENDIAN) | |
4446 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
4447 | val = bswap16(val); | |
4448 | } | |
4449 | #else | |
4450 | if (endian == DEVICE_BIG_ENDIAN) { | |
4451 | val = bswap16(val); | |
4452 | } | |
4453 | #endif | |
4454 | io_mem_write(io_index, addr, val, 2); | |
4455 | } else { | |
4456 | unsigned long addr1; | |
4457 | addr1 = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) | |
4458 | + section_addr(section, addr); | |
4459 | /* RAM case */ | |
4460 | ptr = qemu_get_ram_ptr(addr1); | |
4461 | switch (endian) { | |
4462 | case DEVICE_LITTLE_ENDIAN: | |
4463 | stw_le_p(ptr, val); | |
4464 | break; | |
4465 | case DEVICE_BIG_ENDIAN: | |
4466 | stw_be_p(ptr, val); | |
4467 | break; | |
4468 | default: | |
4469 | stw_p(ptr, val); | |
4470 | break; | |
4471 | } | |
4472 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
4473 | /* invalidate code */ | |
4474 | tb_invalidate_phys_page_range(addr1, addr1 + 2, 0); | |
4475 | /* set dirty bit */ | |
4476 | cpu_physical_memory_set_dirty_flags(addr1, | |
4477 | (0xff & ~CODE_DIRTY_FLAG)); | |
4478 | } | |
4479 | } | |
4480 | } | |
4481 | ||
4482 | void stw_phys(target_phys_addr_t addr, uint32_t val) | |
4483 | { | |
4484 | stw_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN); | |
4485 | } | |
4486 | ||
4487 | void stw_le_phys(target_phys_addr_t addr, uint32_t val) | |
4488 | { | |
4489 | stw_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN); | |
4490 | } | |
4491 | ||
4492 | void stw_be_phys(target_phys_addr_t addr, uint32_t val) | |
4493 | { | |
4494 | stw_phys_internal(addr, val, DEVICE_BIG_ENDIAN); | |
4495 | } | |
4496 | ||
4497 | /* XXX: optimize */ | |
4498 | void stq_phys(target_phys_addr_t addr, uint64_t val) | |
4499 | { | |
4500 | val = tswap64(val); | |
4501 | cpu_physical_memory_write(addr, &val, 8); | |
4502 | } | |
4503 | ||
4504 | void stq_le_phys(target_phys_addr_t addr, uint64_t val) | |
4505 | { | |
4506 | val = cpu_to_le64(val); | |
4507 | cpu_physical_memory_write(addr, &val, 8); | |
4508 | } | |
4509 | ||
4510 | void stq_be_phys(target_phys_addr_t addr, uint64_t val) | |
4511 | { | |
4512 | val = cpu_to_be64(val); | |
4513 | cpu_physical_memory_write(addr, &val, 8); | |
4514 | } | |
4515 | ||
4516 | /* virtual memory access for debug (includes writing to ROM) */ | |
4517 | int cpu_memory_rw_debug(CPUState *env, target_ulong addr, | |
4518 | uint8_t *buf, int len, int is_write) | |
4519 | { | |
4520 | int l; | |
4521 | target_phys_addr_t phys_addr; | |
4522 | target_ulong page; | |
4523 | ||
4524 | while (len > 0) { | |
4525 | page = addr & TARGET_PAGE_MASK; | |
4526 | phys_addr = cpu_get_phys_page_debug(env, page); | |
4527 | /* if no physical page mapped, return an error */ | |
4528 | if (phys_addr == -1) | |
4529 | return -1; | |
4530 | l = (page + TARGET_PAGE_SIZE) - addr; | |
4531 | if (l > len) | |
4532 | l = len; | |
4533 | phys_addr += (addr & ~TARGET_PAGE_MASK); | |
4534 | if (is_write) | |
4535 | cpu_physical_memory_write_rom(phys_addr, buf, l); | |
4536 | else | |
4537 | cpu_physical_memory_rw(phys_addr, buf, l, is_write); | |
4538 | len -= l; | |
4539 | buf += l; | |
4540 | addr += l; | |
4541 | } | |
4542 | return 0; | |
4543 | } | |
4544 | #endif | |
4545 | ||
4546 | /* in deterministic execution mode, instructions doing device I/Os | |
4547 | must be at the end of the TB */ | |
4548 | void cpu_io_recompile(CPUState *env, void *retaddr) | |
4549 | { | |
4550 | TranslationBlock *tb; | |
4551 | uint32_t n, cflags; | |
4552 | target_ulong pc, cs_base; | |
4553 | uint64_t flags; | |
4554 | ||
4555 | tb = tb_find_pc((unsigned long)retaddr); | |
4556 | if (!tb) { | |
4557 | cpu_abort(env, "cpu_io_recompile: could not find TB for pc=%p", | |
4558 | retaddr); | |
4559 | } | |
4560 | n = env->icount_decr.u16.low + tb->icount; | |
4561 | cpu_restore_state(tb, env, (unsigned long)retaddr); | |
4562 | /* Calculate how many instructions had been executed before the fault | |
4563 | occurred. */ | |
4564 | n = n - env->icount_decr.u16.low; | |
4565 | /* Generate a new TB ending on the I/O insn. */ | |
4566 | n++; | |
4567 | /* On MIPS and SH, delay slot instructions can only be restarted if | |
4568 | they were already the first instruction in the TB. If this is not | |
4569 | the first instruction in a TB then re-execute the preceding | |
4570 | branch. */ | |
4571 | #if defined(TARGET_MIPS) | |
4572 | if ((env->hflags & MIPS_HFLAG_BMASK) != 0 && n > 1) { | |
4573 | env->active_tc.PC -= 4; | |
4574 | env->icount_decr.u16.low++; | |
4575 | env->hflags &= ~MIPS_HFLAG_BMASK; | |
4576 | } | |
4577 | #elif defined(TARGET_SH4) | |
4578 | if ((env->flags & ((DELAY_SLOT | DELAY_SLOT_CONDITIONAL))) != 0 | |
4579 | && n > 1) { | |
4580 | env->pc -= 2; | |
4581 | env->icount_decr.u16.low++; | |
4582 | env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL); | |
4583 | } | |
4584 | #endif | |
4585 | /* This should never happen. */ | |
4586 | if (n > CF_COUNT_MASK) | |
4587 | cpu_abort(env, "TB too big during recompile"); | |
4588 | ||
4589 | cflags = n | CF_LAST_IO; | |
4590 | pc = tb->pc; | |
4591 | cs_base = tb->cs_base; | |
4592 | flags = tb->flags; | |
4593 | tb_phys_invalidate(tb, -1); | |
4594 | /* FIXME: In theory this could raise an exception. In practice | |
4595 | we have already translated the block once so it's probably ok. */ | |
4596 | tb_gen_code(env, pc, cs_base, flags, cflags); | |
4597 | /* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not | |
4598 | the first in the TB) then we end up generating a whole new TB and | |
4599 | repeating the fault, which is horribly inefficient. | |
4600 | Better would be to execute just this insn uncached, or generate a | |
4601 | second new TB. */ | |
4602 | cpu_resume_from_signal(env, NULL); | |
4603 | } | |
4604 | ||
4605 | #if !defined(CONFIG_USER_ONLY) | |
4606 | ||
4607 | void dump_exec_info(FILE *f, fprintf_function cpu_fprintf) | |
4608 | { | |
4609 | int i, target_code_size, max_target_code_size; | |
4610 | int direct_jmp_count, direct_jmp2_count, cross_page; | |
4611 | TranslationBlock *tb; | |
4612 | ||
4613 | target_code_size = 0; | |
4614 | max_target_code_size = 0; | |
4615 | cross_page = 0; | |
4616 | direct_jmp_count = 0; | |
4617 | direct_jmp2_count = 0; | |
4618 | for(i = 0; i < nb_tbs; i++) { | |
4619 | tb = &tbs[i]; | |
4620 | target_code_size += tb->size; | |
4621 | if (tb->size > max_target_code_size) | |
4622 | max_target_code_size = tb->size; | |
4623 | if (tb->page_addr[1] != -1) | |
4624 | cross_page++; | |
4625 | if (tb->tb_next_offset[0] != 0xffff) { | |
4626 | direct_jmp_count++; | |
4627 | if (tb->tb_next_offset[1] != 0xffff) { | |
4628 | direct_jmp2_count++; | |
4629 | } | |
4630 | } | |
4631 | } | |
4632 | /* XXX: avoid using doubles ? */ | |
4633 | cpu_fprintf(f, "Translation buffer state:\n"); | |
4634 | cpu_fprintf(f, "gen code size %td/%ld\n", | |
4635 | code_gen_ptr - code_gen_buffer, code_gen_buffer_max_size); | |
4636 | cpu_fprintf(f, "TB count %d/%d\n", | |
4637 | nb_tbs, code_gen_max_blocks); | |
4638 | cpu_fprintf(f, "TB avg target size %d max=%d bytes\n", | |
4639 | nb_tbs ? target_code_size / nb_tbs : 0, | |
4640 | max_target_code_size); | |
4641 | cpu_fprintf(f, "TB avg host size %td bytes (expansion ratio: %0.1f)\n", | |
4642 | nb_tbs ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0, | |
4643 | target_code_size ? (double) (code_gen_ptr - code_gen_buffer) / target_code_size : 0); | |
4644 | cpu_fprintf(f, "cross page TB count %d (%d%%)\n", | |
4645 | cross_page, | |
4646 | nb_tbs ? (cross_page * 100) / nb_tbs : 0); | |
4647 | cpu_fprintf(f, "direct jump count %d (%d%%) (2 jumps=%d %d%%)\n", | |
4648 | direct_jmp_count, | |
4649 | nb_tbs ? (direct_jmp_count * 100) / nb_tbs : 0, | |
4650 | direct_jmp2_count, | |
4651 | nb_tbs ? (direct_jmp2_count * 100) / nb_tbs : 0); | |
4652 | cpu_fprintf(f, "\nStatistics:\n"); | |
4653 | cpu_fprintf(f, "TB flush count %d\n", tb_flush_count); | |
4654 | cpu_fprintf(f, "TB invalidate count %d\n", tb_phys_invalidate_count); | |
4655 | cpu_fprintf(f, "TLB flush count %d\n", tlb_flush_count); | |
4656 | tcg_dump_info(f, cpu_fprintf); | |
4657 | } | |
4658 | ||
4659 | /* NOTE: this function can trigger an exception */ | |
4660 | /* NOTE2: the returned address is not exactly the physical address: it | |
4661 | is the offset relative to phys_ram_base */ | |
4662 | tb_page_addr_t get_page_addr_code(CPUState *env1, target_ulong addr) | |
4663 | { | |
4664 | int mmu_idx, page_index, pd; | |
4665 | void *p; | |
4666 | ||
4667 | page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
4668 | mmu_idx = cpu_mmu_index(env1); | |
4669 | if (unlikely(env1->tlb_table[mmu_idx][page_index].addr_code != | |
4670 | (addr & TARGET_PAGE_MASK))) { | |
4671 | ldub_code(addr); | |
4672 | } | |
4673 | pd = env1->tlb_table[mmu_idx][page_index].addr_code & ~TARGET_PAGE_MASK; | |
4674 | if (pd != io_mem_ram.ram_addr && pd != io_mem_rom.ram_addr | |
4675 | && !io_mem_region[pd]->rom_device) { | |
4676 | #if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SPARC) | |
4677 | cpu_unassigned_access(env1, addr, 0, 1, 0, 4); | |
4678 | #else | |
4679 | cpu_abort(env1, "Trying to execute code outside RAM or ROM at 0x" TARGET_FMT_lx "\n", addr); | |
4680 | #endif | |
4681 | } | |
4682 | p = (void *)((uintptr_t)addr + env1->tlb_table[mmu_idx][page_index].addend); | |
4683 | return qemu_ram_addr_from_host_nofail(p); | |
4684 | } | |
4685 | ||
4686 | /* | |
4687 | * A helper function for the _utterly broken_ virtio device model to find out if | |
4688 | * it's running on a big endian machine. Don't do this at home kids! | |
4689 | */ | |
4690 | bool virtio_is_big_endian(void); | |
4691 | bool virtio_is_big_endian(void) | |
4692 | { | |
4693 | #if defined(TARGET_WORDS_BIGENDIAN) | |
4694 | return true; | |
4695 | #else | |
4696 | return false; | |
4697 | #endif | |
4698 | } | |
4699 | ||
4700 | #define MMUSUFFIX _cmmu | |
4701 | #undef GETPC | |
4702 | #define GETPC() NULL | |
4703 | #define env cpu_single_env | |
4704 | #define SOFTMMU_CODE_ACCESS | |
4705 | ||
4706 | #define SHIFT 0 | |
4707 | #include "softmmu_template.h" | |
4708 | ||
4709 | #define SHIFT 1 | |
4710 | #include "softmmu_template.h" | |
4711 | ||
4712 | #define SHIFT 2 | |
4713 | #include "softmmu_template.h" | |
4714 | ||
4715 | #define SHIFT 3 | |
4716 | #include "softmmu_template.h" | |
4717 | ||
4718 | #undef env | |
4719 | ||
4720 | #endif |