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1 | /* | |
2 | * Virtual page mapping | |
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 "qemu/osdep.h" | |
33 | #include "sysemu/kvm.h" | |
34 | #include "hw/xen/xen.h" | |
35 | #include "qemu/timer.h" | |
36 | #include "qemu/config-file.h" | |
37 | #include "exec/memory.h" | |
38 | #include "sysemu/dma.h" | |
39 | #include "exec/address-spaces.h" | |
40 | #if defined(CONFIG_USER_ONLY) | |
41 | #include <qemu.h> | |
42 | #else /* !CONFIG_USER_ONLY */ | |
43 | #include "sysemu/xen-mapcache.h" | |
44 | #include "trace.h" | |
45 | #endif | |
46 | #include "exec/cpu-all.h" | |
47 | ||
48 | #include "exec/cputlb.h" | |
49 | #include "translate-all.h" | |
50 | ||
51 | #include "exec/memory-internal.h" | |
52 | ||
53 | //#define DEBUG_SUBPAGE | |
54 | ||
55 | #if !defined(CONFIG_USER_ONLY) | |
56 | int phys_ram_fd; | |
57 | static int in_migration; | |
58 | ||
59 | RAMList ram_list = { .blocks = QTAILQ_HEAD_INITIALIZER(ram_list.blocks) }; | |
60 | ||
61 | static MemoryRegion *system_memory; | |
62 | static MemoryRegion *system_io; | |
63 | ||
64 | AddressSpace address_space_io; | |
65 | AddressSpace address_space_memory; | |
66 | ||
67 | MemoryRegion io_mem_rom, io_mem_notdirty; | |
68 | static MemoryRegion io_mem_unassigned; | |
69 | ||
70 | #endif | |
71 | ||
72 | CPUArchState *first_cpu; | |
73 | /* current CPU in the current thread. It is only valid inside | |
74 | cpu_exec() */ | |
75 | DEFINE_TLS(CPUArchState *,cpu_single_env); | |
76 | /* 0 = Do not count executed instructions. | |
77 | 1 = Precise instruction counting. | |
78 | 2 = Adaptive rate instruction counting. */ | |
79 | int use_icount; | |
80 | ||
81 | #if !defined(CONFIG_USER_ONLY) | |
82 | ||
83 | typedef struct PhysPageEntry PhysPageEntry; | |
84 | ||
85 | struct PhysPageEntry { | |
86 | uint16_t is_leaf : 1; | |
87 | /* index into phys_sections (is_leaf) or phys_map_nodes (!is_leaf) */ | |
88 | uint16_t ptr : 15; | |
89 | }; | |
90 | ||
91 | struct AddressSpaceDispatch { | |
92 | /* This is a multi-level map on the physical address space. | |
93 | * The bottom level has pointers to MemoryRegionSections. | |
94 | */ | |
95 | PhysPageEntry phys_map; | |
96 | MemoryListener listener; | |
97 | AddressSpace *as; | |
98 | }; | |
99 | ||
100 | #define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK) | |
101 | typedef struct subpage_t { | |
102 | MemoryRegion iomem; | |
103 | AddressSpace *as; | |
104 | hwaddr base; | |
105 | uint16_t sub_section[TARGET_PAGE_SIZE]; | |
106 | } subpage_t; | |
107 | ||
108 | static MemoryRegionSection *phys_sections; | |
109 | static unsigned phys_sections_nb, phys_sections_nb_alloc; | |
110 | static uint16_t phys_section_unassigned; | |
111 | static uint16_t phys_section_notdirty; | |
112 | static uint16_t phys_section_rom; | |
113 | static uint16_t phys_section_watch; | |
114 | ||
115 | /* Simple allocator for PhysPageEntry nodes */ | |
116 | static PhysPageEntry (*phys_map_nodes)[L2_SIZE]; | |
117 | static unsigned phys_map_nodes_nb, phys_map_nodes_nb_alloc; | |
118 | ||
119 | #define PHYS_MAP_NODE_NIL (((uint16_t)~0) >> 1) | |
120 | ||
121 | static void io_mem_init(void); | |
122 | static void memory_map_init(void); | |
123 | static void *qemu_safe_ram_ptr(ram_addr_t addr); | |
124 | ||
125 | static MemoryRegion io_mem_watch; | |
126 | #endif | |
127 | ||
128 | #if !defined(CONFIG_USER_ONLY) | |
129 | ||
130 | static void phys_map_node_reserve(unsigned nodes) | |
131 | { | |
132 | if (phys_map_nodes_nb + nodes > phys_map_nodes_nb_alloc) { | |
133 | typedef PhysPageEntry Node[L2_SIZE]; | |
134 | phys_map_nodes_nb_alloc = MAX(phys_map_nodes_nb_alloc * 2, 16); | |
135 | phys_map_nodes_nb_alloc = MAX(phys_map_nodes_nb_alloc, | |
136 | phys_map_nodes_nb + nodes); | |
137 | phys_map_nodes = g_renew(Node, phys_map_nodes, | |
138 | phys_map_nodes_nb_alloc); | |
139 | } | |
140 | } | |
141 | ||
142 | static uint16_t phys_map_node_alloc(void) | |
143 | { | |
144 | unsigned i; | |
145 | uint16_t ret; | |
146 | ||
147 | ret = phys_map_nodes_nb++; | |
148 | assert(ret != PHYS_MAP_NODE_NIL); | |
149 | assert(ret != phys_map_nodes_nb_alloc); | |
150 | for (i = 0; i < L2_SIZE; ++i) { | |
151 | phys_map_nodes[ret][i].is_leaf = 0; | |
152 | phys_map_nodes[ret][i].ptr = PHYS_MAP_NODE_NIL; | |
153 | } | |
154 | return ret; | |
155 | } | |
156 | ||
157 | static void phys_map_nodes_reset(void) | |
158 | { | |
159 | phys_map_nodes_nb = 0; | |
160 | } | |
161 | ||
162 | ||
163 | static void phys_page_set_level(PhysPageEntry *lp, hwaddr *index, | |
164 | hwaddr *nb, uint16_t leaf, | |
165 | int level) | |
166 | { | |
167 | PhysPageEntry *p; | |
168 | int i; | |
169 | hwaddr step = (hwaddr)1 << (level * L2_BITS); | |
170 | ||
171 | if (!lp->is_leaf && lp->ptr == PHYS_MAP_NODE_NIL) { | |
172 | lp->ptr = phys_map_node_alloc(); | |
173 | p = phys_map_nodes[lp->ptr]; | |
174 | if (level == 0) { | |
175 | for (i = 0; i < L2_SIZE; i++) { | |
176 | p[i].is_leaf = 1; | |
177 | p[i].ptr = phys_section_unassigned; | |
178 | } | |
179 | } | |
180 | } else { | |
181 | p = phys_map_nodes[lp->ptr]; | |
182 | } | |
183 | lp = &p[(*index >> (level * L2_BITS)) & (L2_SIZE - 1)]; | |
184 | ||
185 | while (*nb && lp < &p[L2_SIZE]) { | |
186 | if ((*index & (step - 1)) == 0 && *nb >= step) { | |
187 | lp->is_leaf = true; | |
188 | lp->ptr = leaf; | |
189 | *index += step; | |
190 | *nb -= step; | |
191 | } else { | |
192 | phys_page_set_level(lp, index, nb, leaf, level - 1); | |
193 | } | |
194 | ++lp; | |
195 | } | |
196 | } | |
197 | ||
198 | static void phys_page_set(AddressSpaceDispatch *d, | |
199 | hwaddr index, hwaddr nb, | |
200 | uint16_t leaf) | |
201 | { | |
202 | /* Wildly overreserve - it doesn't matter much. */ | |
203 | phys_map_node_reserve(3 * P_L2_LEVELS); | |
204 | ||
205 | phys_page_set_level(&d->phys_map, &index, &nb, leaf, P_L2_LEVELS - 1); | |
206 | } | |
207 | ||
208 | static MemoryRegionSection *phys_page_find(AddressSpaceDispatch *d, hwaddr index) | |
209 | { | |
210 | PhysPageEntry lp = d->phys_map; | |
211 | PhysPageEntry *p; | |
212 | int i; | |
213 | ||
214 | for (i = P_L2_LEVELS - 1; i >= 0 && !lp.is_leaf; i--) { | |
215 | if (lp.ptr == PHYS_MAP_NODE_NIL) { | |
216 | return &phys_sections[phys_section_unassigned]; | |
217 | } | |
218 | p = phys_map_nodes[lp.ptr]; | |
219 | lp = p[(index >> (i * L2_BITS)) & (L2_SIZE - 1)]; | |
220 | } | |
221 | return &phys_sections[lp.ptr]; | |
222 | } | |
223 | ||
224 | bool memory_region_is_unassigned(MemoryRegion *mr) | |
225 | { | |
226 | return mr != &io_mem_rom && mr != &io_mem_notdirty && !mr->rom_device | |
227 | && mr != &io_mem_watch; | |
228 | } | |
229 | ||
230 | static MemoryRegionSection *address_space_lookup_region(AddressSpace *as, | |
231 | hwaddr addr, | |
232 | bool resolve_subpage) | |
233 | { | |
234 | MemoryRegionSection *section; | |
235 | subpage_t *subpage; | |
236 | ||
237 | section = phys_page_find(as->dispatch, addr >> TARGET_PAGE_BITS); | |
238 | if (resolve_subpage && section->mr->subpage) { | |
239 | subpage = container_of(section->mr, subpage_t, iomem); | |
240 | section = &phys_sections[subpage->sub_section[SUBPAGE_IDX(addr)]]; | |
241 | } | |
242 | return section; | |
243 | } | |
244 | ||
245 | static MemoryRegionSection * | |
246 | address_space_translate_internal(AddressSpace *as, hwaddr addr, hwaddr *xlat, | |
247 | hwaddr *plen, bool resolve_subpage) | |
248 | { | |
249 | MemoryRegionSection *section; | |
250 | Int128 diff; | |
251 | ||
252 | section = address_space_lookup_region(as, addr, resolve_subpage); | |
253 | /* Compute offset within MemoryRegionSection */ | |
254 | addr -= section->offset_within_address_space; | |
255 | ||
256 | /* Compute offset within MemoryRegion */ | |
257 | *xlat = addr + section->offset_within_region; | |
258 | ||
259 | diff = int128_sub(section->mr->size, int128_make64(addr)); | |
260 | *plen = int128_get64(int128_min(diff, int128_make64(*plen))); | |
261 | return section; | |
262 | } | |
263 | ||
264 | MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr, | |
265 | hwaddr *xlat, hwaddr *plen, | |
266 | bool is_write) | |
267 | { | |
268 | IOMMUTLBEntry iotlb; | |
269 | MemoryRegionSection *section; | |
270 | MemoryRegion *mr; | |
271 | hwaddr len = *plen; | |
272 | ||
273 | for (;;) { | |
274 | section = address_space_translate_internal(as, addr, &addr, plen, true); | |
275 | mr = section->mr; | |
276 | ||
277 | if (!mr->iommu_ops) { | |
278 | break; | |
279 | } | |
280 | ||
281 | iotlb = mr->iommu_ops->translate(mr, addr); | |
282 | addr = ((iotlb.translated_addr & ~iotlb.addr_mask) | |
283 | | (addr & iotlb.addr_mask)); | |
284 | len = MIN(len, (addr | iotlb.addr_mask) - addr + 1); | |
285 | if (!(iotlb.perm & (1 << is_write))) { | |
286 | mr = &io_mem_unassigned; | |
287 | break; | |
288 | } | |
289 | ||
290 | as = iotlb.target_as; | |
291 | } | |
292 | ||
293 | *plen = len; | |
294 | *xlat = addr; | |
295 | return mr; | |
296 | } | |
297 | ||
298 | MemoryRegionSection * | |
299 | address_space_translate_for_iotlb(AddressSpace *as, hwaddr addr, hwaddr *xlat, | |
300 | hwaddr *plen) | |
301 | { | |
302 | MemoryRegionSection *section; | |
303 | section = address_space_translate_internal(as, addr, xlat, plen, false); | |
304 | ||
305 | assert(!section->mr->iommu_ops); | |
306 | return section; | |
307 | } | |
308 | #endif | |
309 | ||
310 | void cpu_exec_init_all(void) | |
311 | { | |
312 | #if !defined(CONFIG_USER_ONLY) | |
313 | qemu_mutex_init(&ram_list.mutex); | |
314 | memory_map_init(); | |
315 | io_mem_init(); | |
316 | #endif | |
317 | } | |
318 | ||
319 | #if !defined(CONFIG_USER_ONLY) | |
320 | ||
321 | static int cpu_common_post_load(void *opaque, int version_id) | |
322 | { | |
323 | CPUState *cpu = opaque; | |
324 | ||
325 | /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the | |
326 | version_id is increased. */ | |
327 | cpu->interrupt_request &= ~0x01; | |
328 | tlb_flush(cpu->env_ptr, 1); | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | static const VMStateDescription vmstate_cpu_common = { | |
334 | .name = "cpu_common", | |
335 | .version_id = 1, | |
336 | .minimum_version_id = 1, | |
337 | .minimum_version_id_old = 1, | |
338 | .post_load = cpu_common_post_load, | |
339 | .fields = (VMStateField []) { | |
340 | VMSTATE_UINT32(halted, CPUState), | |
341 | VMSTATE_UINT32(interrupt_request, CPUState), | |
342 | VMSTATE_END_OF_LIST() | |
343 | } | |
344 | }; | |
345 | #else | |
346 | #define vmstate_cpu_common vmstate_dummy | |
347 | #endif | |
348 | ||
349 | CPUState *qemu_get_cpu(int index) | |
350 | { | |
351 | CPUArchState *env = first_cpu; | |
352 | CPUState *cpu = NULL; | |
353 | ||
354 | while (env) { | |
355 | cpu = ENV_GET_CPU(env); | |
356 | if (cpu->cpu_index == index) { | |
357 | break; | |
358 | } | |
359 | env = env->next_cpu; | |
360 | } | |
361 | ||
362 | return env ? cpu : NULL; | |
363 | } | |
364 | ||
365 | void qemu_for_each_cpu(void (*func)(CPUState *cpu, void *data), void *data) | |
366 | { | |
367 | CPUArchState *env = first_cpu; | |
368 | ||
369 | while (env) { | |
370 | func(ENV_GET_CPU(env), data); | |
371 | env = env->next_cpu; | |
372 | } | |
373 | } | |
374 | ||
375 | void cpu_exec_init(CPUArchState *env) | |
376 | { | |
377 | CPUState *cpu = ENV_GET_CPU(env); | |
378 | CPUClass *cc = CPU_GET_CLASS(cpu); | |
379 | CPUArchState **penv; | |
380 | int cpu_index; | |
381 | ||
382 | #if defined(CONFIG_USER_ONLY) | |
383 | cpu_list_lock(); | |
384 | #endif | |
385 | env->next_cpu = NULL; | |
386 | penv = &first_cpu; | |
387 | cpu_index = 0; | |
388 | while (*penv != NULL) { | |
389 | penv = &(*penv)->next_cpu; | |
390 | cpu_index++; | |
391 | } | |
392 | cpu->cpu_index = cpu_index; | |
393 | cpu->numa_node = 0; | |
394 | QTAILQ_INIT(&env->breakpoints); | |
395 | QTAILQ_INIT(&env->watchpoints); | |
396 | #ifndef CONFIG_USER_ONLY | |
397 | cpu->thread_id = qemu_get_thread_id(); | |
398 | #endif | |
399 | *penv = env; | |
400 | #if defined(CONFIG_USER_ONLY) | |
401 | cpu_list_unlock(); | |
402 | #endif | |
403 | vmstate_register(NULL, cpu_index, &vmstate_cpu_common, cpu); | |
404 | #if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY) | |
405 | register_savevm(NULL, "cpu", cpu_index, CPU_SAVE_VERSION, | |
406 | cpu_save, cpu_load, env); | |
407 | assert(cc->vmsd == NULL); | |
408 | #endif | |
409 | if (cc->vmsd != NULL) { | |
410 | vmstate_register(NULL, cpu_index, cc->vmsd, cpu); | |
411 | } | |
412 | } | |
413 | ||
414 | #if defined(TARGET_HAS_ICE) | |
415 | #if defined(CONFIG_USER_ONLY) | |
416 | static void breakpoint_invalidate(CPUArchState *env, target_ulong pc) | |
417 | { | |
418 | tb_invalidate_phys_page_range(pc, pc + 1, 0); | |
419 | } | |
420 | #else | |
421 | static void breakpoint_invalidate(CPUArchState *env, target_ulong pc) | |
422 | { | |
423 | tb_invalidate_phys_addr(cpu_get_phys_page_debug(env, pc) | | |
424 | (pc & ~TARGET_PAGE_MASK)); | |
425 | } | |
426 | #endif | |
427 | #endif /* TARGET_HAS_ICE */ | |
428 | ||
429 | #if defined(CONFIG_USER_ONLY) | |
430 | void cpu_watchpoint_remove_all(CPUArchState *env, int mask) | |
431 | ||
432 | { | |
433 | } | |
434 | ||
435 | int cpu_watchpoint_insert(CPUArchState *env, target_ulong addr, target_ulong len, | |
436 | int flags, CPUWatchpoint **watchpoint) | |
437 | { | |
438 | return -ENOSYS; | |
439 | } | |
440 | #else | |
441 | /* Add a watchpoint. */ | |
442 | int cpu_watchpoint_insert(CPUArchState *env, target_ulong addr, target_ulong len, | |
443 | int flags, CPUWatchpoint **watchpoint) | |
444 | { | |
445 | target_ulong len_mask = ~(len - 1); | |
446 | CPUWatchpoint *wp; | |
447 | ||
448 | /* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */ | |
449 | if ((len & (len - 1)) || (addr & ~len_mask) || | |
450 | len == 0 || len > TARGET_PAGE_SIZE) { | |
451 | fprintf(stderr, "qemu: tried to set invalid watchpoint at " | |
452 | TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len); | |
453 | return -EINVAL; | |
454 | } | |
455 | wp = g_malloc(sizeof(*wp)); | |
456 | ||
457 | wp->vaddr = addr; | |
458 | wp->len_mask = len_mask; | |
459 | wp->flags = flags; | |
460 | ||
461 | /* keep all GDB-injected watchpoints in front */ | |
462 | if (flags & BP_GDB) | |
463 | QTAILQ_INSERT_HEAD(&env->watchpoints, wp, entry); | |
464 | else | |
465 | QTAILQ_INSERT_TAIL(&env->watchpoints, wp, entry); | |
466 | ||
467 | tlb_flush_page(env, addr); | |
468 | ||
469 | if (watchpoint) | |
470 | *watchpoint = wp; | |
471 | return 0; | |
472 | } | |
473 | ||
474 | /* Remove a specific watchpoint. */ | |
475 | int cpu_watchpoint_remove(CPUArchState *env, target_ulong addr, target_ulong len, | |
476 | int flags) | |
477 | { | |
478 | target_ulong len_mask = ~(len - 1); | |
479 | CPUWatchpoint *wp; | |
480 | ||
481 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
482 | if (addr == wp->vaddr && len_mask == wp->len_mask | |
483 | && flags == (wp->flags & ~BP_WATCHPOINT_HIT)) { | |
484 | cpu_watchpoint_remove_by_ref(env, wp); | |
485 | return 0; | |
486 | } | |
487 | } | |
488 | return -ENOENT; | |
489 | } | |
490 | ||
491 | /* Remove a specific watchpoint by reference. */ | |
492 | void cpu_watchpoint_remove_by_ref(CPUArchState *env, CPUWatchpoint *watchpoint) | |
493 | { | |
494 | QTAILQ_REMOVE(&env->watchpoints, watchpoint, entry); | |
495 | ||
496 | tlb_flush_page(env, watchpoint->vaddr); | |
497 | ||
498 | g_free(watchpoint); | |
499 | } | |
500 | ||
501 | /* Remove all matching watchpoints. */ | |
502 | void cpu_watchpoint_remove_all(CPUArchState *env, int mask) | |
503 | { | |
504 | CPUWatchpoint *wp, *next; | |
505 | ||
506 | QTAILQ_FOREACH_SAFE(wp, &env->watchpoints, entry, next) { | |
507 | if (wp->flags & mask) | |
508 | cpu_watchpoint_remove_by_ref(env, wp); | |
509 | } | |
510 | } | |
511 | #endif | |
512 | ||
513 | /* Add a breakpoint. */ | |
514 | int cpu_breakpoint_insert(CPUArchState *env, target_ulong pc, int flags, | |
515 | CPUBreakpoint **breakpoint) | |
516 | { | |
517 | #if defined(TARGET_HAS_ICE) | |
518 | CPUBreakpoint *bp; | |
519 | ||
520 | bp = g_malloc(sizeof(*bp)); | |
521 | ||
522 | bp->pc = pc; | |
523 | bp->flags = flags; | |
524 | ||
525 | /* keep all GDB-injected breakpoints in front */ | |
526 | if (flags & BP_GDB) | |
527 | QTAILQ_INSERT_HEAD(&env->breakpoints, bp, entry); | |
528 | else | |
529 | QTAILQ_INSERT_TAIL(&env->breakpoints, bp, entry); | |
530 | ||
531 | breakpoint_invalidate(env, pc); | |
532 | ||
533 | if (breakpoint) | |
534 | *breakpoint = bp; | |
535 | return 0; | |
536 | #else | |
537 | return -ENOSYS; | |
538 | #endif | |
539 | } | |
540 | ||
541 | /* Remove a specific breakpoint. */ | |
542 | int cpu_breakpoint_remove(CPUArchState *env, target_ulong pc, int flags) | |
543 | { | |
544 | #if defined(TARGET_HAS_ICE) | |
545 | CPUBreakpoint *bp; | |
546 | ||
547 | QTAILQ_FOREACH(bp, &env->breakpoints, entry) { | |
548 | if (bp->pc == pc && bp->flags == flags) { | |
549 | cpu_breakpoint_remove_by_ref(env, bp); | |
550 | return 0; | |
551 | } | |
552 | } | |
553 | return -ENOENT; | |
554 | #else | |
555 | return -ENOSYS; | |
556 | #endif | |
557 | } | |
558 | ||
559 | /* Remove a specific breakpoint by reference. */ | |
560 | void cpu_breakpoint_remove_by_ref(CPUArchState *env, CPUBreakpoint *breakpoint) | |
561 | { | |
562 | #if defined(TARGET_HAS_ICE) | |
563 | QTAILQ_REMOVE(&env->breakpoints, breakpoint, entry); | |
564 | ||
565 | breakpoint_invalidate(env, breakpoint->pc); | |
566 | ||
567 | g_free(breakpoint); | |
568 | #endif | |
569 | } | |
570 | ||
571 | /* Remove all matching breakpoints. */ | |
572 | void cpu_breakpoint_remove_all(CPUArchState *env, int mask) | |
573 | { | |
574 | #if defined(TARGET_HAS_ICE) | |
575 | CPUBreakpoint *bp, *next; | |
576 | ||
577 | QTAILQ_FOREACH_SAFE(bp, &env->breakpoints, entry, next) { | |
578 | if (bp->flags & mask) | |
579 | cpu_breakpoint_remove_by_ref(env, bp); | |
580 | } | |
581 | #endif | |
582 | } | |
583 | ||
584 | /* enable or disable single step mode. EXCP_DEBUG is returned by the | |
585 | CPU loop after each instruction */ | |
586 | void cpu_single_step(CPUArchState *env, int enabled) | |
587 | { | |
588 | #if defined(TARGET_HAS_ICE) | |
589 | if (env->singlestep_enabled != enabled) { | |
590 | env->singlestep_enabled = enabled; | |
591 | if (kvm_enabled()) | |
592 | kvm_update_guest_debug(env, 0); | |
593 | else { | |
594 | /* must flush all the translated code to avoid inconsistencies */ | |
595 | /* XXX: only flush what is necessary */ | |
596 | tb_flush(env); | |
597 | } | |
598 | } | |
599 | #endif | |
600 | } | |
601 | ||
602 | void cpu_exit(CPUArchState *env) | |
603 | { | |
604 | CPUState *cpu = ENV_GET_CPU(env); | |
605 | ||
606 | cpu->exit_request = 1; | |
607 | cpu->tcg_exit_req = 1; | |
608 | } | |
609 | ||
610 | void cpu_abort(CPUArchState *env, const char *fmt, ...) | |
611 | { | |
612 | va_list ap; | |
613 | va_list ap2; | |
614 | ||
615 | va_start(ap, fmt); | |
616 | va_copy(ap2, ap); | |
617 | fprintf(stderr, "qemu: fatal: "); | |
618 | vfprintf(stderr, fmt, ap); | |
619 | fprintf(stderr, "\n"); | |
620 | cpu_dump_state(env, stderr, fprintf, CPU_DUMP_FPU | CPU_DUMP_CCOP); | |
621 | if (qemu_log_enabled()) { | |
622 | qemu_log("qemu: fatal: "); | |
623 | qemu_log_vprintf(fmt, ap2); | |
624 | qemu_log("\n"); | |
625 | log_cpu_state(env, CPU_DUMP_FPU | CPU_DUMP_CCOP); | |
626 | qemu_log_flush(); | |
627 | qemu_log_close(); | |
628 | } | |
629 | va_end(ap2); | |
630 | va_end(ap); | |
631 | #if defined(CONFIG_USER_ONLY) | |
632 | { | |
633 | struct sigaction act; | |
634 | sigfillset(&act.sa_mask); | |
635 | act.sa_handler = SIG_DFL; | |
636 | sigaction(SIGABRT, &act, NULL); | |
637 | } | |
638 | #endif | |
639 | abort(); | |
640 | } | |
641 | ||
642 | CPUArchState *cpu_copy(CPUArchState *env) | |
643 | { | |
644 | CPUArchState *new_env = cpu_init(env->cpu_model_str); | |
645 | CPUArchState *next_cpu = new_env->next_cpu; | |
646 | #if defined(TARGET_HAS_ICE) | |
647 | CPUBreakpoint *bp; | |
648 | CPUWatchpoint *wp; | |
649 | #endif | |
650 | ||
651 | memcpy(new_env, env, sizeof(CPUArchState)); | |
652 | ||
653 | /* Preserve chaining. */ | |
654 | new_env->next_cpu = next_cpu; | |
655 | ||
656 | /* Clone all break/watchpoints. | |
657 | Note: Once we support ptrace with hw-debug register access, make sure | |
658 | BP_CPU break/watchpoints are handled correctly on clone. */ | |
659 | QTAILQ_INIT(&env->breakpoints); | |
660 | QTAILQ_INIT(&env->watchpoints); | |
661 | #if defined(TARGET_HAS_ICE) | |
662 | QTAILQ_FOREACH(bp, &env->breakpoints, entry) { | |
663 | cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL); | |
664 | } | |
665 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
666 | cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1, | |
667 | wp->flags, NULL); | |
668 | } | |
669 | #endif | |
670 | ||
671 | return new_env; | |
672 | } | |
673 | ||
674 | #if !defined(CONFIG_USER_ONLY) | |
675 | static void tlb_reset_dirty_range_all(ram_addr_t start, ram_addr_t end, | |
676 | uintptr_t length) | |
677 | { | |
678 | uintptr_t start1; | |
679 | ||
680 | /* we modify the TLB cache so that the dirty bit will be set again | |
681 | when accessing the range */ | |
682 | start1 = (uintptr_t)qemu_safe_ram_ptr(start); | |
683 | /* Check that we don't span multiple blocks - this breaks the | |
684 | address comparisons below. */ | |
685 | if ((uintptr_t)qemu_safe_ram_ptr(end - 1) - start1 | |
686 | != (end - 1) - start) { | |
687 | abort(); | |
688 | } | |
689 | cpu_tlb_reset_dirty_all(start1, length); | |
690 | ||
691 | } | |
692 | ||
693 | /* Note: start and end must be within the same ram block. */ | |
694 | void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end, | |
695 | int dirty_flags) | |
696 | { | |
697 | uintptr_t length; | |
698 | ||
699 | start &= TARGET_PAGE_MASK; | |
700 | end = TARGET_PAGE_ALIGN(end); | |
701 | ||
702 | length = end - start; | |
703 | if (length == 0) | |
704 | return; | |
705 | cpu_physical_memory_mask_dirty_range(start, length, dirty_flags); | |
706 | ||
707 | if (tcg_enabled()) { | |
708 | tlb_reset_dirty_range_all(start, end, length); | |
709 | } | |
710 | } | |
711 | ||
712 | static int cpu_physical_memory_set_dirty_tracking(int enable) | |
713 | { | |
714 | int ret = 0; | |
715 | in_migration = enable; | |
716 | return ret; | |
717 | } | |
718 | ||
719 | hwaddr memory_region_section_get_iotlb(CPUArchState *env, | |
720 | MemoryRegionSection *section, | |
721 | target_ulong vaddr, | |
722 | hwaddr paddr, hwaddr xlat, | |
723 | int prot, | |
724 | target_ulong *address) | |
725 | { | |
726 | hwaddr iotlb; | |
727 | CPUWatchpoint *wp; | |
728 | ||
729 | if (memory_region_is_ram(section->mr)) { | |
730 | /* Normal RAM. */ | |
731 | iotlb = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) | |
732 | + xlat; | |
733 | if (!section->readonly) { | |
734 | iotlb |= phys_section_notdirty; | |
735 | } else { | |
736 | iotlb |= phys_section_rom; | |
737 | } | |
738 | } else { | |
739 | iotlb = section - phys_sections; | |
740 | iotlb += xlat; | |
741 | } | |
742 | ||
743 | /* Make accesses to pages with watchpoints go via the | |
744 | watchpoint trap routines. */ | |
745 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
746 | if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) { | |
747 | /* Avoid trapping reads of pages with a write breakpoint. */ | |
748 | if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) { | |
749 | iotlb = phys_section_watch + paddr; | |
750 | *address |= TLB_MMIO; | |
751 | break; | |
752 | } | |
753 | } | |
754 | } | |
755 | ||
756 | return iotlb; | |
757 | } | |
758 | #endif /* defined(CONFIG_USER_ONLY) */ | |
759 | ||
760 | #if !defined(CONFIG_USER_ONLY) | |
761 | ||
762 | static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, | |
763 | uint16_t section); | |
764 | static subpage_t *subpage_init(AddressSpace *as, hwaddr base); | |
765 | static void destroy_page_desc(uint16_t section_index) | |
766 | { | |
767 | MemoryRegionSection *section = &phys_sections[section_index]; | |
768 | MemoryRegion *mr = section->mr; | |
769 | ||
770 | if (mr->subpage) { | |
771 | subpage_t *subpage = container_of(mr, subpage_t, iomem); | |
772 | memory_region_destroy(&subpage->iomem); | |
773 | g_free(subpage); | |
774 | } | |
775 | } | |
776 | ||
777 | static void destroy_l2_mapping(PhysPageEntry *lp, unsigned level) | |
778 | { | |
779 | unsigned i; | |
780 | PhysPageEntry *p; | |
781 | ||
782 | if (lp->ptr == PHYS_MAP_NODE_NIL) { | |
783 | return; | |
784 | } | |
785 | ||
786 | p = phys_map_nodes[lp->ptr]; | |
787 | for (i = 0; i < L2_SIZE; ++i) { | |
788 | if (!p[i].is_leaf) { | |
789 | destroy_l2_mapping(&p[i], level - 1); | |
790 | } else { | |
791 | destroy_page_desc(p[i].ptr); | |
792 | } | |
793 | } | |
794 | lp->is_leaf = 0; | |
795 | lp->ptr = PHYS_MAP_NODE_NIL; | |
796 | } | |
797 | ||
798 | static void destroy_all_mappings(AddressSpaceDispatch *d) | |
799 | { | |
800 | destroy_l2_mapping(&d->phys_map, P_L2_LEVELS - 1); | |
801 | phys_map_nodes_reset(); | |
802 | } | |
803 | ||
804 | static uint16_t phys_section_add(MemoryRegionSection *section) | |
805 | { | |
806 | /* The physical section number is ORed with a page-aligned | |
807 | * pointer to produce the iotlb entries. Thus it should | |
808 | * never overflow into the page-aligned value. | |
809 | */ | |
810 | assert(phys_sections_nb < TARGET_PAGE_SIZE); | |
811 | ||
812 | if (phys_sections_nb == phys_sections_nb_alloc) { | |
813 | phys_sections_nb_alloc = MAX(phys_sections_nb_alloc * 2, 16); | |
814 | phys_sections = g_renew(MemoryRegionSection, phys_sections, | |
815 | phys_sections_nb_alloc); | |
816 | } | |
817 | phys_sections[phys_sections_nb] = *section; | |
818 | return phys_sections_nb++; | |
819 | } | |
820 | ||
821 | static void phys_sections_clear(void) | |
822 | { | |
823 | phys_sections_nb = 0; | |
824 | } | |
825 | ||
826 | static void register_subpage(AddressSpaceDispatch *d, MemoryRegionSection *section) | |
827 | { | |
828 | subpage_t *subpage; | |
829 | hwaddr base = section->offset_within_address_space | |
830 | & TARGET_PAGE_MASK; | |
831 | MemoryRegionSection *existing = phys_page_find(d, base >> TARGET_PAGE_BITS); | |
832 | MemoryRegionSection subsection = { | |
833 | .offset_within_address_space = base, | |
834 | .size = int128_make64(TARGET_PAGE_SIZE), | |
835 | }; | |
836 | hwaddr start, end; | |
837 | ||
838 | assert(existing->mr->subpage || existing->mr == &io_mem_unassigned); | |
839 | ||
840 | if (!(existing->mr->subpage)) { | |
841 | subpage = subpage_init(d->as, base); | |
842 | subsection.mr = &subpage->iomem; | |
843 | phys_page_set(d, base >> TARGET_PAGE_BITS, 1, | |
844 | phys_section_add(&subsection)); | |
845 | } else { | |
846 | subpage = container_of(existing->mr, subpage_t, iomem); | |
847 | } | |
848 | start = section->offset_within_address_space & ~TARGET_PAGE_MASK; | |
849 | end = start + int128_get64(section->size) - 1; | |
850 | subpage_register(subpage, start, end, phys_section_add(section)); | |
851 | } | |
852 | ||
853 | ||
854 | static void register_multipage(AddressSpaceDispatch *d, | |
855 | MemoryRegionSection *section) | |
856 | { | |
857 | hwaddr start_addr = section->offset_within_address_space; | |
858 | uint16_t section_index = phys_section_add(section); | |
859 | uint64_t num_pages = int128_get64(int128_rshift(section->size, | |
860 | TARGET_PAGE_BITS)); | |
861 | ||
862 | assert(num_pages); | |
863 | phys_page_set(d, start_addr >> TARGET_PAGE_BITS, num_pages, section_index); | |
864 | } | |
865 | ||
866 | static void mem_add(MemoryListener *listener, MemoryRegionSection *section) | |
867 | { | |
868 | AddressSpaceDispatch *d = container_of(listener, AddressSpaceDispatch, listener); | |
869 | MemoryRegionSection now = *section, remain = *section; | |
870 | Int128 page_size = int128_make64(TARGET_PAGE_SIZE); | |
871 | ||
872 | if (now.offset_within_address_space & ~TARGET_PAGE_MASK) { | |
873 | uint64_t left = TARGET_PAGE_ALIGN(now.offset_within_address_space) | |
874 | - now.offset_within_address_space; | |
875 | ||
876 | now.size = int128_min(int128_make64(left), now.size); | |
877 | register_subpage(d, &now); | |
878 | } else { | |
879 | now.size = int128_zero(); | |
880 | } | |
881 | while (int128_ne(remain.size, now.size)) { | |
882 | remain.size = int128_sub(remain.size, now.size); | |
883 | remain.offset_within_address_space += int128_get64(now.size); | |
884 | remain.offset_within_region += int128_get64(now.size); | |
885 | now = remain; | |
886 | if (int128_lt(remain.size, page_size)) { | |
887 | register_subpage(d, &now); | |
888 | } else if (remain.offset_within_region & ~TARGET_PAGE_MASK) { | |
889 | now.size = page_size; | |
890 | register_subpage(d, &now); | |
891 | } else { | |
892 | now.size = int128_and(now.size, int128_neg(page_size)); | |
893 | register_multipage(d, &now); | |
894 | } | |
895 | } | |
896 | } | |
897 | ||
898 | void qemu_flush_coalesced_mmio_buffer(void) | |
899 | { | |
900 | if (kvm_enabled()) | |
901 | kvm_flush_coalesced_mmio_buffer(); | |
902 | } | |
903 | ||
904 | void qemu_mutex_lock_ramlist(void) | |
905 | { | |
906 | qemu_mutex_lock(&ram_list.mutex); | |
907 | } | |
908 | ||
909 | void qemu_mutex_unlock_ramlist(void) | |
910 | { | |
911 | qemu_mutex_unlock(&ram_list.mutex); | |
912 | } | |
913 | ||
914 | #if defined(__linux__) && !defined(TARGET_S390X) | |
915 | ||
916 | #include <sys/vfs.h> | |
917 | ||
918 | #define HUGETLBFS_MAGIC 0x958458f6 | |
919 | ||
920 | static long gethugepagesize(const char *path) | |
921 | { | |
922 | struct statfs fs; | |
923 | int ret; | |
924 | ||
925 | do { | |
926 | ret = statfs(path, &fs); | |
927 | } while (ret != 0 && errno == EINTR); | |
928 | ||
929 | if (ret != 0) { | |
930 | perror(path); | |
931 | return 0; | |
932 | } | |
933 | ||
934 | if (fs.f_type != HUGETLBFS_MAGIC) | |
935 | fprintf(stderr, "Warning: path not on HugeTLBFS: %s\n", path); | |
936 | ||
937 | return fs.f_bsize; | |
938 | } | |
939 | ||
940 | static void *file_ram_alloc(RAMBlock *block, | |
941 | ram_addr_t memory, | |
942 | const char *path) | |
943 | { | |
944 | char *filename; | |
945 | char *sanitized_name; | |
946 | char *c; | |
947 | void *area; | |
948 | int fd; | |
949 | #ifdef MAP_POPULATE | |
950 | int flags; | |
951 | #endif | |
952 | unsigned long hpagesize; | |
953 | ||
954 | hpagesize = gethugepagesize(path); | |
955 | if (!hpagesize) { | |
956 | return NULL; | |
957 | } | |
958 | ||
959 | if (memory < hpagesize) { | |
960 | return NULL; | |
961 | } | |
962 | ||
963 | if (kvm_enabled() && !kvm_has_sync_mmu()) { | |
964 | fprintf(stderr, "host lacks kvm mmu notifiers, -mem-path unsupported\n"); | |
965 | return NULL; | |
966 | } | |
967 | ||
968 | /* Make name safe to use with mkstemp by replacing '/' with '_'. */ | |
969 | sanitized_name = g_strdup(block->mr->name); | |
970 | for (c = sanitized_name; *c != '\0'; c++) { | |
971 | if (*c == '/') | |
972 | *c = '_'; | |
973 | } | |
974 | ||
975 | filename = g_strdup_printf("%s/qemu_back_mem.%s.XXXXXX", path, | |
976 | sanitized_name); | |
977 | g_free(sanitized_name); | |
978 | ||
979 | fd = mkstemp(filename); | |
980 | if (fd < 0) { | |
981 | perror("unable to create backing store for hugepages"); | |
982 | g_free(filename); | |
983 | return NULL; | |
984 | } | |
985 | unlink(filename); | |
986 | g_free(filename); | |
987 | ||
988 | memory = (memory+hpagesize-1) & ~(hpagesize-1); | |
989 | ||
990 | /* | |
991 | * ftruncate is not supported by hugetlbfs in older | |
992 | * hosts, so don't bother bailing out on errors. | |
993 | * If anything goes wrong with it under other filesystems, | |
994 | * mmap will fail. | |
995 | */ | |
996 | if (ftruncate(fd, memory)) | |
997 | perror("ftruncate"); | |
998 | ||
999 | #ifdef MAP_POPULATE | |
1000 | /* NB: MAP_POPULATE won't exhaustively alloc all phys pages in the case | |
1001 | * MAP_PRIVATE is requested. For mem_prealloc we mmap as MAP_SHARED | |
1002 | * to sidestep this quirk. | |
1003 | */ | |
1004 | flags = mem_prealloc ? MAP_POPULATE | MAP_SHARED : MAP_PRIVATE; | |
1005 | area = mmap(0, memory, PROT_READ | PROT_WRITE, flags, fd, 0); | |
1006 | #else | |
1007 | area = mmap(0, memory, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); | |
1008 | #endif | |
1009 | if (area == MAP_FAILED) { | |
1010 | perror("file_ram_alloc: can't mmap RAM pages"); | |
1011 | close(fd); | |
1012 | return (NULL); | |
1013 | } | |
1014 | block->fd = fd; | |
1015 | return area; | |
1016 | } | |
1017 | #endif | |
1018 | ||
1019 | static ram_addr_t find_ram_offset(ram_addr_t size) | |
1020 | { | |
1021 | RAMBlock *block, *next_block; | |
1022 | ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX; | |
1023 | ||
1024 | assert(size != 0); /* it would hand out same offset multiple times */ | |
1025 | ||
1026 | if (QTAILQ_EMPTY(&ram_list.blocks)) | |
1027 | return 0; | |
1028 | ||
1029 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1030 | ram_addr_t end, next = RAM_ADDR_MAX; | |
1031 | ||
1032 | end = block->offset + block->length; | |
1033 | ||
1034 | QTAILQ_FOREACH(next_block, &ram_list.blocks, next) { | |
1035 | if (next_block->offset >= end) { | |
1036 | next = MIN(next, next_block->offset); | |
1037 | } | |
1038 | } | |
1039 | if (next - end >= size && next - end < mingap) { | |
1040 | offset = end; | |
1041 | mingap = next - end; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | if (offset == RAM_ADDR_MAX) { | |
1046 | fprintf(stderr, "Failed to find gap of requested size: %" PRIu64 "\n", | |
1047 | (uint64_t)size); | |
1048 | abort(); | |
1049 | } | |
1050 | ||
1051 | return offset; | |
1052 | } | |
1053 | ||
1054 | ram_addr_t last_ram_offset(void) | |
1055 | { | |
1056 | RAMBlock *block; | |
1057 | ram_addr_t last = 0; | |
1058 | ||
1059 | QTAILQ_FOREACH(block, &ram_list.blocks, next) | |
1060 | last = MAX(last, block->offset + block->length); | |
1061 | ||
1062 | return last; | |
1063 | } | |
1064 | ||
1065 | static void qemu_ram_setup_dump(void *addr, ram_addr_t size) | |
1066 | { | |
1067 | int ret; | |
1068 | QemuOpts *machine_opts; | |
1069 | ||
1070 | /* Use MADV_DONTDUMP, if user doesn't want the guest memory in the core */ | |
1071 | machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0); | |
1072 | if (machine_opts && | |
1073 | !qemu_opt_get_bool(machine_opts, "dump-guest-core", true)) { | |
1074 | ret = qemu_madvise(addr, size, QEMU_MADV_DONTDUMP); | |
1075 | if (ret) { | |
1076 | perror("qemu_madvise"); | |
1077 | fprintf(stderr, "madvise doesn't support MADV_DONTDUMP, " | |
1078 | "but dump_guest_core=off specified\n"); | |
1079 | } | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev) | |
1084 | { | |
1085 | RAMBlock *new_block, *block; | |
1086 | ||
1087 | new_block = NULL; | |
1088 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1089 | if (block->offset == addr) { | |
1090 | new_block = block; | |
1091 | break; | |
1092 | } | |
1093 | } | |
1094 | assert(new_block); | |
1095 | assert(!new_block->idstr[0]); | |
1096 | ||
1097 | if (dev) { | |
1098 | char *id = qdev_get_dev_path(dev); | |
1099 | if (id) { | |
1100 | snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id); | |
1101 | g_free(id); | |
1102 | } | |
1103 | } | |
1104 | pstrcat(new_block->idstr, sizeof(new_block->idstr), name); | |
1105 | ||
1106 | /* This assumes the iothread lock is taken here too. */ | |
1107 | qemu_mutex_lock_ramlist(); | |
1108 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1109 | if (block != new_block && !strcmp(block->idstr, new_block->idstr)) { | |
1110 | fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n", | |
1111 | new_block->idstr); | |
1112 | abort(); | |
1113 | } | |
1114 | } | |
1115 | qemu_mutex_unlock_ramlist(); | |
1116 | } | |
1117 | ||
1118 | static int memory_try_enable_merging(void *addr, size_t len) | |
1119 | { | |
1120 | QemuOpts *opts; | |
1121 | ||
1122 | opts = qemu_opts_find(qemu_find_opts("machine"), 0); | |
1123 | if (opts && !qemu_opt_get_bool(opts, "mem-merge", true)) { | |
1124 | /* disabled by the user */ | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | return qemu_madvise(addr, len, QEMU_MADV_MERGEABLE); | |
1129 | } | |
1130 | ||
1131 | ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, | |
1132 | MemoryRegion *mr) | |
1133 | { | |
1134 | RAMBlock *block, *new_block; | |
1135 | ||
1136 | size = TARGET_PAGE_ALIGN(size); | |
1137 | new_block = g_malloc0(sizeof(*new_block)); | |
1138 | ||
1139 | /* This assumes the iothread lock is taken here too. */ | |
1140 | qemu_mutex_lock_ramlist(); | |
1141 | new_block->mr = mr; | |
1142 | new_block->offset = find_ram_offset(size); | |
1143 | if (host) { | |
1144 | new_block->host = host; | |
1145 | new_block->flags |= RAM_PREALLOC_MASK; | |
1146 | } else { | |
1147 | if (mem_path) { | |
1148 | #if defined (__linux__) && !defined(TARGET_S390X) | |
1149 | new_block->host = file_ram_alloc(new_block, size, mem_path); | |
1150 | if (!new_block->host) { | |
1151 | new_block->host = qemu_anon_ram_alloc(size); | |
1152 | memory_try_enable_merging(new_block->host, size); | |
1153 | } | |
1154 | #else | |
1155 | fprintf(stderr, "-mem-path option unsupported\n"); | |
1156 | exit(1); | |
1157 | #endif | |
1158 | } else { | |
1159 | if (xen_enabled()) { | |
1160 | xen_ram_alloc(new_block->offset, size, mr); | |
1161 | } else if (kvm_enabled()) { | |
1162 | /* some s390/kvm configurations have special constraints */ | |
1163 | new_block->host = kvm_ram_alloc(size); | |
1164 | } else { | |
1165 | new_block->host = qemu_anon_ram_alloc(size); | |
1166 | } | |
1167 | memory_try_enable_merging(new_block->host, size); | |
1168 | } | |
1169 | } | |
1170 | new_block->length = size; | |
1171 | ||
1172 | /* Keep the list sorted from biggest to smallest block. */ | |
1173 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1174 | if (block->length < new_block->length) { | |
1175 | break; | |
1176 | } | |
1177 | } | |
1178 | if (block) { | |
1179 | QTAILQ_INSERT_BEFORE(block, new_block, next); | |
1180 | } else { | |
1181 | QTAILQ_INSERT_TAIL(&ram_list.blocks, new_block, next); | |
1182 | } | |
1183 | ram_list.mru_block = NULL; | |
1184 | ||
1185 | ram_list.version++; | |
1186 | qemu_mutex_unlock_ramlist(); | |
1187 | ||
1188 | ram_list.phys_dirty = g_realloc(ram_list.phys_dirty, | |
1189 | last_ram_offset() >> TARGET_PAGE_BITS); | |
1190 | memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS), | |
1191 | 0, size >> TARGET_PAGE_BITS); | |
1192 | cpu_physical_memory_set_dirty_range(new_block->offset, size, 0xff); | |
1193 | ||
1194 | qemu_ram_setup_dump(new_block->host, size); | |
1195 | qemu_madvise(new_block->host, size, QEMU_MADV_HUGEPAGE); | |
1196 | ||
1197 | if (kvm_enabled()) | |
1198 | kvm_setup_guest_memory(new_block->host, size); | |
1199 | ||
1200 | return new_block->offset; | |
1201 | } | |
1202 | ||
1203 | ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr) | |
1204 | { | |
1205 | return qemu_ram_alloc_from_ptr(size, NULL, mr); | |
1206 | } | |
1207 | ||
1208 | void qemu_ram_free_from_ptr(ram_addr_t addr) | |
1209 | { | |
1210 | RAMBlock *block; | |
1211 | ||
1212 | /* This assumes the iothread lock is taken here too. */ | |
1213 | qemu_mutex_lock_ramlist(); | |
1214 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1215 | if (addr == block->offset) { | |
1216 | QTAILQ_REMOVE(&ram_list.blocks, block, next); | |
1217 | ram_list.mru_block = NULL; | |
1218 | ram_list.version++; | |
1219 | g_free(block); | |
1220 | break; | |
1221 | } | |
1222 | } | |
1223 | qemu_mutex_unlock_ramlist(); | |
1224 | } | |
1225 | ||
1226 | void qemu_ram_free(ram_addr_t addr) | |
1227 | { | |
1228 | RAMBlock *block; | |
1229 | ||
1230 | /* This assumes the iothread lock is taken here too. */ | |
1231 | qemu_mutex_lock_ramlist(); | |
1232 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1233 | if (addr == block->offset) { | |
1234 | QTAILQ_REMOVE(&ram_list.blocks, block, next); | |
1235 | ram_list.mru_block = NULL; | |
1236 | ram_list.version++; | |
1237 | if (block->flags & RAM_PREALLOC_MASK) { | |
1238 | ; | |
1239 | } else if (mem_path) { | |
1240 | #if defined (__linux__) && !defined(TARGET_S390X) | |
1241 | if (block->fd) { | |
1242 | munmap(block->host, block->length); | |
1243 | close(block->fd); | |
1244 | } else { | |
1245 | qemu_anon_ram_free(block->host, block->length); | |
1246 | } | |
1247 | #else | |
1248 | abort(); | |
1249 | #endif | |
1250 | } else { | |
1251 | if (xen_enabled()) { | |
1252 | xen_invalidate_map_cache_entry(block->host); | |
1253 | } else { | |
1254 | qemu_anon_ram_free(block->host, block->length); | |
1255 | } | |
1256 | } | |
1257 | g_free(block); | |
1258 | break; | |
1259 | } | |
1260 | } | |
1261 | qemu_mutex_unlock_ramlist(); | |
1262 | ||
1263 | } | |
1264 | ||
1265 | #ifndef _WIN32 | |
1266 | void qemu_ram_remap(ram_addr_t addr, ram_addr_t length) | |
1267 | { | |
1268 | RAMBlock *block; | |
1269 | ram_addr_t offset; | |
1270 | int flags; | |
1271 | void *area, *vaddr; | |
1272 | ||
1273 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1274 | offset = addr - block->offset; | |
1275 | if (offset < block->length) { | |
1276 | vaddr = block->host + offset; | |
1277 | if (block->flags & RAM_PREALLOC_MASK) { | |
1278 | ; | |
1279 | } else { | |
1280 | flags = MAP_FIXED; | |
1281 | munmap(vaddr, length); | |
1282 | if (mem_path) { | |
1283 | #if defined(__linux__) && !defined(TARGET_S390X) | |
1284 | if (block->fd) { | |
1285 | #ifdef MAP_POPULATE | |
1286 | flags |= mem_prealloc ? MAP_POPULATE | MAP_SHARED : | |
1287 | MAP_PRIVATE; | |
1288 | #else | |
1289 | flags |= MAP_PRIVATE; | |
1290 | #endif | |
1291 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, | |
1292 | flags, block->fd, offset); | |
1293 | } else { | |
1294 | flags |= MAP_PRIVATE | MAP_ANONYMOUS; | |
1295 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, | |
1296 | flags, -1, 0); | |
1297 | } | |
1298 | #else | |
1299 | abort(); | |
1300 | #endif | |
1301 | } else { | |
1302 | #if defined(TARGET_S390X) && defined(CONFIG_KVM) | |
1303 | flags |= MAP_SHARED | MAP_ANONYMOUS; | |
1304 | area = mmap(vaddr, length, PROT_EXEC|PROT_READ|PROT_WRITE, | |
1305 | flags, -1, 0); | |
1306 | #else | |
1307 | flags |= MAP_PRIVATE | MAP_ANONYMOUS; | |
1308 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, | |
1309 | flags, -1, 0); | |
1310 | #endif | |
1311 | } | |
1312 | if (area != vaddr) { | |
1313 | fprintf(stderr, "Could not remap addr: " | |
1314 | RAM_ADDR_FMT "@" RAM_ADDR_FMT "\n", | |
1315 | length, addr); | |
1316 | exit(1); | |
1317 | } | |
1318 | memory_try_enable_merging(vaddr, length); | |
1319 | qemu_ram_setup_dump(vaddr, length); | |
1320 | } | |
1321 | return; | |
1322 | } | |
1323 | } | |
1324 | } | |
1325 | #endif /* !_WIN32 */ | |
1326 | ||
1327 | /* Return a host pointer to ram allocated with qemu_ram_alloc. | |
1328 | With the exception of the softmmu code in this file, this should | |
1329 | only be used for local memory (e.g. video ram) that the device owns, | |
1330 | and knows it isn't going to access beyond the end of the block. | |
1331 | ||
1332 | It should not be used for general purpose DMA. | |
1333 | Use cpu_physical_memory_map/cpu_physical_memory_rw instead. | |
1334 | */ | |
1335 | void *qemu_get_ram_ptr(ram_addr_t addr) | |
1336 | { | |
1337 | RAMBlock *block; | |
1338 | ||
1339 | /* The list is protected by the iothread lock here. */ | |
1340 | block = ram_list.mru_block; | |
1341 | if (block && addr - block->offset < block->length) { | |
1342 | goto found; | |
1343 | } | |
1344 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1345 | if (addr - block->offset < block->length) { | |
1346 | goto found; | |
1347 | } | |
1348 | } | |
1349 | ||
1350 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); | |
1351 | abort(); | |
1352 | ||
1353 | found: | |
1354 | ram_list.mru_block = block; | |
1355 | if (xen_enabled()) { | |
1356 | /* We need to check if the requested address is in the RAM | |
1357 | * because we don't want to map the entire memory in QEMU. | |
1358 | * In that case just map until the end of the page. | |
1359 | */ | |
1360 | if (block->offset == 0) { | |
1361 | return xen_map_cache(addr, 0, 0); | |
1362 | } else if (block->host == NULL) { | |
1363 | block->host = | |
1364 | xen_map_cache(block->offset, block->length, 1); | |
1365 | } | |
1366 | } | |
1367 | return block->host + (addr - block->offset); | |
1368 | } | |
1369 | ||
1370 | /* Return a host pointer to ram allocated with qemu_ram_alloc. Same as | |
1371 | * qemu_get_ram_ptr but do not touch ram_list.mru_block. | |
1372 | * | |
1373 | * ??? Is this still necessary? | |
1374 | */ | |
1375 | static void *qemu_safe_ram_ptr(ram_addr_t addr) | |
1376 | { | |
1377 | RAMBlock *block; | |
1378 | ||
1379 | /* The list is protected by the iothread lock here. */ | |
1380 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1381 | if (addr - block->offset < block->length) { | |
1382 | if (xen_enabled()) { | |
1383 | /* We need to check if the requested address is in the RAM | |
1384 | * because we don't want to map the entire memory in QEMU. | |
1385 | * In that case just map until the end of the page. | |
1386 | */ | |
1387 | if (block->offset == 0) { | |
1388 | return xen_map_cache(addr, 0, 0); | |
1389 | } else if (block->host == NULL) { | |
1390 | block->host = | |
1391 | xen_map_cache(block->offset, block->length, 1); | |
1392 | } | |
1393 | } | |
1394 | return block->host + (addr - block->offset); | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); | |
1399 | abort(); | |
1400 | ||
1401 | return NULL; | |
1402 | } | |
1403 | ||
1404 | /* Return a host pointer to guest's ram. Similar to qemu_get_ram_ptr | |
1405 | * but takes a size argument */ | |
1406 | static void *qemu_ram_ptr_length(ram_addr_t addr, ram_addr_t *size) | |
1407 | { | |
1408 | if (*size == 0) { | |
1409 | return NULL; | |
1410 | } | |
1411 | if (xen_enabled()) { | |
1412 | return xen_map_cache(addr, *size, 1); | |
1413 | } else { | |
1414 | RAMBlock *block; | |
1415 | ||
1416 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1417 | if (addr - block->offset < block->length) { | |
1418 | if (addr - block->offset + *size > block->length) | |
1419 | *size = block->length - addr + block->offset; | |
1420 | return block->host + (addr - block->offset); | |
1421 | } | |
1422 | } | |
1423 | ||
1424 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); | |
1425 | abort(); | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) | |
1430 | { | |
1431 | RAMBlock *block; | |
1432 | uint8_t *host = ptr; | |
1433 | ||
1434 | if (xen_enabled()) { | |
1435 | *ram_addr = xen_ram_addr_from_mapcache(ptr); | |
1436 | return 0; | |
1437 | } | |
1438 | ||
1439 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
1440 | /* This case append when the block is not mapped. */ | |
1441 | if (block->host == NULL) { | |
1442 | continue; | |
1443 | } | |
1444 | if (host - block->host < block->length) { | |
1445 | *ram_addr = block->offset + (host - block->host); | |
1446 | return 0; | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | return -1; | |
1451 | } | |
1452 | ||
1453 | /* Some of the softmmu routines need to translate from a host pointer | |
1454 | (typically a TLB entry) back to a ram offset. */ | |
1455 | ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr) | |
1456 | { | |
1457 | ram_addr_t ram_addr; | |
1458 | ||
1459 | if (qemu_ram_addr_from_host(ptr, &ram_addr)) { | |
1460 | fprintf(stderr, "Bad ram pointer %p\n", ptr); | |
1461 | abort(); | |
1462 | } | |
1463 | return ram_addr; | |
1464 | } | |
1465 | ||
1466 | static void notdirty_mem_write(void *opaque, hwaddr ram_addr, | |
1467 | uint64_t val, unsigned size) | |
1468 | { | |
1469 | int dirty_flags; | |
1470 | dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr); | |
1471 | if (!(dirty_flags & CODE_DIRTY_FLAG)) { | |
1472 | tb_invalidate_phys_page_fast(ram_addr, size); | |
1473 | dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr); | |
1474 | } | |
1475 | switch (size) { | |
1476 | case 1: | |
1477 | stb_p(qemu_get_ram_ptr(ram_addr), val); | |
1478 | break; | |
1479 | case 2: | |
1480 | stw_p(qemu_get_ram_ptr(ram_addr), val); | |
1481 | break; | |
1482 | case 4: | |
1483 | stl_p(qemu_get_ram_ptr(ram_addr), val); | |
1484 | break; | |
1485 | default: | |
1486 | abort(); | |
1487 | } | |
1488 | dirty_flags |= (0xff & ~CODE_DIRTY_FLAG); | |
1489 | cpu_physical_memory_set_dirty_flags(ram_addr, dirty_flags); | |
1490 | /* we remove the notdirty callback only if the code has been | |
1491 | flushed */ | |
1492 | if (dirty_flags == 0xff) | |
1493 | tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); | |
1494 | } | |
1495 | ||
1496 | static bool notdirty_mem_accepts(void *opaque, hwaddr addr, | |
1497 | unsigned size, bool is_write) | |
1498 | { | |
1499 | return is_write; | |
1500 | } | |
1501 | ||
1502 | static const MemoryRegionOps notdirty_mem_ops = { | |
1503 | .write = notdirty_mem_write, | |
1504 | .valid.accepts = notdirty_mem_accepts, | |
1505 | .endianness = DEVICE_NATIVE_ENDIAN, | |
1506 | }; | |
1507 | ||
1508 | /* Generate a debug exception if a watchpoint has been hit. */ | |
1509 | static void check_watchpoint(int offset, int len_mask, int flags) | |
1510 | { | |
1511 | CPUArchState *env = cpu_single_env; | |
1512 | target_ulong pc, cs_base; | |
1513 | target_ulong vaddr; | |
1514 | CPUWatchpoint *wp; | |
1515 | int cpu_flags; | |
1516 | ||
1517 | if (env->watchpoint_hit) { | |
1518 | /* We re-entered the check after replacing the TB. Now raise | |
1519 | * the debug interrupt so that is will trigger after the | |
1520 | * current instruction. */ | |
1521 | cpu_interrupt(ENV_GET_CPU(env), CPU_INTERRUPT_DEBUG); | |
1522 | return; | |
1523 | } | |
1524 | vaddr = (env->mem_io_vaddr & TARGET_PAGE_MASK) + offset; | |
1525 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) { | |
1526 | if ((vaddr == (wp->vaddr & len_mask) || | |
1527 | (vaddr & wp->len_mask) == wp->vaddr) && (wp->flags & flags)) { | |
1528 | wp->flags |= BP_WATCHPOINT_HIT; | |
1529 | if (!env->watchpoint_hit) { | |
1530 | env->watchpoint_hit = wp; | |
1531 | tb_check_watchpoint(env); | |
1532 | if (wp->flags & BP_STOP_BEFORE_ACCESS) { | |
1533 | env->exception_index = EXCP_DEBUG; | |
1534 | cpu_loop_exit(env); | |
1535 | } else { | |
1536 | cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags); | |
1537 | tb_gen_code(env, pc, cs_base, cpu_flags, 1); | |
1538 | cpu_resume_from_signal(env, NULL); | |
1539 | } | |
1540 | } | |
1541 | } else { | |
1542 | wp->flags &= ~BP_WATCHPOINT_HIT; | |
1543 | } | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | /* Watchpoint access routines. Watchpoints are inserted using TLB tricks, | |
1548 | so these check for a hit then pass through to the normal out-of-line | |
1549 | phys routines. */ | |
1550 | static uint64_t watch_mem_read(void *opaque, hwaddr addr, | |
1551 | unsigned size) | |
1552 | { | |
1553 | check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_READ); | |
1554 | switch (size) { | |
1555 | case 1: return ldub_phys(addr); | |
1556 | case 2: return lduw_phys(addr); | |
1557 | case 4: return ldl_phys(addr); | |
1558 | default: abort(); | |
1559 | } | |
1560 | } | |
1561 | ||
1562 | static void watch_mem_write(void *opaque, hwaddr addr, | |
1563 | uint64_t val, unsigned size) | |
1564 | { | |
1565 | check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_WRITE); | |
1566 | switch (size) { | |
1567 | case 1: | |
1568 | stb_phys(addr, val); | |
1569 | break; | |
1570 | case 2: | |
1571 | stw_phys(addr, val); | |
1572 | break; | |
1573 | case 4: | |
1574 | stl_phys(addr, val); | |
1575 | break; | |
1576 | default: abort(); | |
1577 | } | |
1578 | } | |
1579 | ||
1580 | static const MemoryRegionOps watch_mem_ops = { | |
1581 | .read = watch_mem_read, | |
1582 | .write = watch_mem_write, | |
1583 | .endianness = DEVICE_NATIVE_ENDIAN, | |
1584 | }; | |
1585 | ||
1586 | static uint64_t subpage_read(void *opaque, hwaddr addr, | |
1587 | unsigned len) | |
1588 | { | |
1589 | subpage_t *subpage = opaque; | |
1590 | uint8_t buf[4]; | |
1591 | ||
1592 | #if defined(DEBUG_SUBPAGE) | |
1593 | printf("%s: subpage %p len %d addr " TARGET_FMT_plx "\n", __func__, | |
1594 | subpage, len, addr); | |
1595 | #endif | |
1596 | address_space_read(subpage->as, addr + subpage->base, buf, len); | |
1597 | switch (len) { | |
1598 | case 1: | |
1599 | return ldub_p(buf); | |
1600 | case 2: | |
1601 | return lduw_p(buf); | |
1602 | case 4: | |
1603 | return ldl_p(buf); | |
1604 | default: | |
1605 | abort(); | |
1606 | } | |
1607 | } | |
1608 | ||
1609 | static void subpage_write(void *opaque, hwaddr addr, | |
1610 | uint64_t value, unsigned len) | |
1611 | { | |
1612 | subpage_t *subpage = opaque; | |
1613 | uint8_t buf[4]; | |
1614 | ||
1615 | #if defined(DEBUG_SUBPAGE) | |
1616 | printf("%s: subpage %p len %d addr " TARGET_FMT_plx | |
1617 | " value %"PRIx64"\n", | |
1618 | __func__, subpage, len, addr, value); | |
1619 | #endif | |
1620 | switch (len) { | |
1621 | case 1: | |
1622 | stb_p(buf, value); | |
1623 | break; | |
1624 | case 2: | |
1625 | stw_p(buf, value); | |
1626 | break; | |
1627 | case 4: | |
1628 | stl_p(buf, value); | |
1629 | break; | |
1630 | default: | |
1631 | abort(); | |
1632 | } | |
1633 | address_space_write(subpage->as, addr + subpage->base, buf, len); | |
1634 | } | |
1635 | ||
1636 | static bool subpage_accepts(void *opaque, hwaddr addr, | |
1637 | unsigned size, bool is_write) | |
1638 | { | |
1639 | subpage_t *subpage = opaque; | |
1640 | #if defined(DEBUG_SUBPAGE) | |
1641 | printf("%s: subpage %p %c len %d addr " TARGET_FMT_plx "\n", | |
1642 | __func__, subpage, is_write ? 'w' : 'r', len, addr); | |
1643 | #endif | |
1644 | ||
1645 | return address_space_access_valid(subpage->as, addr + subpage->base, | |
1646 | size, is_write); | |
1647 | } | |
1648 | ||
1649 | static const MemoryRegionOps subpage_ops = { | |
1650 | .read = subpage_read, | |
1651 | .write = subpage_write, | |
1652 | .valid.accepts = subpage_accepts, | |
1653 | .endianness = DEVICE_NATIVE_ENDIAN, | |
1654 | }; | |
1655 | ||
1656 | static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, | |
1657 | uint16_t section) | |
1658 | { | |
1659 | int idx, eidx; | |
1660 | ||
1661 | if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE) | |
1662 | return -1; | |
1663 | idx = SUBPAGE_IDX(start); | |
1664 | eidx = SUBPAGE_IDX(end); | |
1665 | #if defined(DEBUG_SUBPAGE) | |
1666 | printf("%s: %p start %08x end %08x idx %08x eidx %08x mem %ld\n", __func__, | |
1667 | mmio, start, end, idx, eidx, memory); | |
1668 | #endif | |
1669 | for (; idx <= eidx; idx++) { | |
1670 | mmio->sub_section[idx] = section; | |
1671 | } | |
1672 | ||
1673 | return 0; | |
1674 | } | |
1675 | ||
1676 | static subpage_t *subpage_init(AddressSpace *as, hwaddr base) | |
1677 | { | |
1678 | subpage_t *mmio; | |
1679 | ||
1680 | mmio = g_malloc0(sizeof(subpage_t)); | |
1681 | ||
1682 | mmio->as = as; | |
1683 | mmio->base = base; | |
1684 | memory_region_init_io(&mmio->iomem, &subpage_ops, mmio, | |
1685 | "subpage", TARGET_PAGE_SIZE); | |
1686 | mmio->iomem.subpage = true; | |
1687 | #if defined(DEBUG_SUBPAGE) | |
1688 | printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__, | |
1689 | mmio, base, TARGET_PAGE_SIZE, subpage_memory); | |
1690 | #endif | |
1691 | subpage_register(mmio, 0, TARGET_PAGE_SIZE-1, phys_section_unassigned); | |
1692 | ||
1693 | return mmio; | |
1694 | } | |
1695 | ||
1696 | static uint16_t dummy_section(MemoryRegion *mr) | |
1697 | { | |
1698 | MemoryRegionSection section = { | |
1699 | .mr = mr, | |
1700 | .offset_within_address_space = 0, | |
1701 | .offset_within_region = 0, | |
1702 | .size = int128_2_64(), | |
1703 | }; | |
1704 | ||
1705 | return phys_section_add(§ion); | |
1706 | } | |
1707 | ||
1708 | MemoryRegion *iotlb_to_region(hwaddr index) | |
1709 | { | |
1710 | return phys_sections[index & ~TARGET_PAGE_MASK].mr; | |
1711 | } | |
1712 | ||
1713 | static void io_mem_init(void) | |
1714 | { | |
1715 | memory_region_init_io(&io_mem_rom, &unassigned_mem_ops, NULL, "rom", UINT64_MAX); | |
1716 | memory_region_init_io(&io_mem_unassigned, &unassigned_mem_ops, NULL, | |
1717 | "unassigned", UINT64_MAX); | |
1718 | memory_region_init_io(&io_mem_notdirty, ¬dirty_mem_ops, NULL, | |
1719 | "notdirty", UINT64_MAX); | |
1720 | memory_region_init_io(&io_mem_watch, &watch_mem_ops, NULL, | |
1721 | "watch", UINT64_MAX); | |
1722 | } | |
1723 | ||
1724 | static void mem_begin(MemoryListener *listener) | |
1725 | { | |
1726 | AddressSpaceDispatch *d = container_of(listener, AddressSpaceDispatch, listener); | |
1727 | ||
1728 | destroy_all_mappings(d); | |
1729 | d->phys_map.ptr = PHYS_MAP_NODE_NIL; | |
1730 | } | |
1731 | ||
1732 | static void core_begin(MemoryListener *listener) | |
1733 | { | |
1734 | phys_sections_clear(); | |
1735 | phys_section_unassigned = dummy_section(&io_mem_unassigned); | |
1736 | phys_section_notdirty = dummy_section(&io_mem_notdirty); | |
1737 | phys_section_rom = dummy_section(&io_mem_rom); | |
1738 | phys_section_watch = dummy_section(&io_mem_watch); | |
1739 | } | |
1740 | ||
1741 | static void tcg_commit(MemoryListener *listener) | |
1742 | { | |
1743 | CPUArchState *env; | |
1744 | ||
1745 | /* since each CPU stores ram addresses in its TLB cache, we must | |
1746 | reset the modified entries */ | |
1747 | /* XXX: slow ! */ | |
1748 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
1749 | tlb_flush(env, 1); | |
1750 | } | |
1751 | } | |
1752 | ||
1753 | static void core_log_global_start(MemoryListener *listener) | |
1754 | { | |
1755 | cpu_physical_memory_set_dirty_tracking(1); | |
1756 | } | |
1757 | ||
1758 | static void core_log_global_stop(MemoryListener *listener) | |
1759 | { | |
1760 | cpu_physical_memory_set_dirty_tracking(0); | |
1761 | } | |
1762 | ||
1763 | static void io_region_add(MemoryListener *listener, | |
1764 | MemoryRegionSection *section) | |
1765 | { | |
1766 | MemoryRegionIORange *mrio = g_new(MemoryRegionIORange, 1); | |
1767 | ||
1768 | mrio->mr = section->mr; | |
1769 | mrio->offset = section->offset_within_region; | |
1770 | iorange_init(&mrio->iorange, &memory_region_iorange_ops, | |
1771 | section->offset_within_address_space, | |
1772 | int128_get64(section->size)); | |
1773 | ioport_register(&mrio->iorange); | |
1774 | } | |
1775 | ||
1776 | static void io_region_del(MemoryListener *listener, | |
1777 | MemoryRegionSection *section) | |
1778 | { | |
1779 | isa_unassign_ioport(section->offset_within_address_space, | |
1780 | int128_get64(section->size)); | |
1781 | } | |
1782 | ||
1783 | static MemoryListener core_memory_listener = { | |
1784 | .begin = core_begin, | |
1785 | .log_global_start = core_log_global_start, | |
1786 | .log_global_stop = core_log_global_stop, | |
1787 | .priority = 1, | |
1788 | }; | |
1789 | ||
1790 | static MemoryListener io_memory_listener = { | |
1791 | .region_add = io_region_add, | |
1792 | .region_del = io_region_del, | |
1793 | .priority = 0, | |
1794 | }; | |
1795 | ||
1796 | static MemoryListener tcg_memory_listener = { | |
1797 | .commit = tcg_commit, | |
1798 | }; | |
1799 | ||
1800 | void address_space_init_dispatch(AddressSpace *as) | |
1801 | { | |
1802 | AddressSpaceDispatch *d = g_new(AddressSpaceDispatch, 1); | |
1803 | ||
1804 | d->phys_map = (PhysPageEntry) { .ptr = PHYS_MAP_NODE_NIL, .is_leaf = 0 }; | |
1805 | d->listener = (MemoryListener) { | |
1806 | .begin = mem_begin, | |
1807 | .region_add = mem_add, | |
1808 | .region_nop = mem_add, | |
1809 | .priority = 0, | |
1810 | }; | |
1811 | d->as = as; | |
1812 | as->dispatch = d; | |
1813 | memory_listener_register(&d->listener, as); | |
1814 | } | |
1815 | ||
1816 | void address_space_destroy_dispatch(AddressSpace *as) | |
1817 | { | |
1818 | AddressSpaceDispatch *d = as->dispatch; | |
1819 | ||
1820 | memory_listener_unregister(&d->listener); | |
1821 | destroy_l2_mapping(&d->phys_map, P_L2_LEVELS - 1); | |
1822 | g_free(d); | |
1823 | as->dispatch = NULL; | |
1824 | } | |
1825 | ||
1826 | static void memory_map_init(void) | |
1827 | { | |
1828 | system_memory = g_malloc(sizeof(*system_memory)); | |
1829 | memory_region_init(system_memory, "system", INT64_MAX); | |
1830 | address_space_init(&address_space_memory, system_memory); | |
1831 | address_space_memory.name = "memory"; | |
1832 | ||
1833 | system_io = g_malloc(sizeof(*system_io)); | |
1834 | memory_region_init(system_io, "io", 65536); | |
1835 | address_space_init(&address_space_io, system_io); | |
1836 | address_space_io.name = "I/O"; | |
1837 | ||
1838 | memory_listener_register(&core_memory_listener, &address_space_memory); | |
1839 | memory_listener_register(&io_memory_listener, &address_space_io); | |
1840 | memory_listener_register(&tcg_memory_listener, &address_space_memory); | |
1841 | } | |
1842 | ||
1843 | MemoryRegion *get_system_memory(void) | |
1844 | { | |
1845 | return system_memory; | |
1846 | } | |
1847 | ||
1848 | MemoryRegion *get_system_io(void) | |
1849 | { | |
1850 | return system_io; | |
1851 | } | |
1852 | ||
1853 | #endif /* !defined(CONFIG_USER_ONLY) */ | |
1854 | ||
1855 | /* physical memory access (slow version, mainly for debug) */ | |
1856 | #if defined(CONFIG_USER_ONLY) | |
1857 | int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr, | |
1858 | uint8_t *buf, int len, int is_write) | |
1859 | { | |
1860 | int l, flags; | |
1861 | target_ulong page; | |
1862 | void * p; | |
1863 | ||
1864 | while (len > 0) { | |
1865 | page = addr & TARGET_PAGE_MASK; | |
1866 | l = (page + TARGET_PAGE_SIZE) - addr; | |
1867 | if (l > len) | |
1868 | l = len; | |
1869 | flags = page_get_flags(page); | |
1870 | if (!(flags & PAGE_VALID)) | |
1871 | return -1; | |
1872 | if (is_write) { | |
1873 | if (!(flags & PAGE_WRITE)) | |
1874 | return -1; | |
1875 | /* XXX: this code should not depend on lock_user */ | |
1876 | if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) | |
1877 | return -1; | |
1878 | memcpy(p, buf, l); | |
1879 | unlock_user(p, addr, l); | |
1880 | } else { | |
1881 | if (!(flags & PAGE_READ)) | |
1882 | return -1; | |
1883 | /* XXX: this code should not depend on lock_user */ | |
1884 | if (!(p = lock_user(VERIFY_READ, addr, l, 1))) | |
1885 | return -1; | |
1886 | memcpy(buf, p, l); | |
1887 | unlock_user(p, addr, 0); | |
1888 | } | |
1889 | len -= l; | |
1890 | buf += l; | |
1891 | addr += l; | |
1892 | } | |
1893 | return 0; | |
1894 | } | |
1895 | ||
1896 | #else | |
1897 | ||
1898 | static void invalidate_and_set_dirty(hwaddr addr, | |
1899 | hwaddr length) | |
1900 | { | |
1901 | if (!cpu_physical_memory_is_dirty(addr)) { | |
1902 | /* invalidate code */ | |
1903 | tb_invalidate_phys_page_range(addr, addr + length, 0); | |
1904 | /* set dirty bit */ | |
1905 | cpu_physical_memory_set_dirty_flags(addr, (0xff & ~CODE_DIRTY_FLAG)); | |
1906 | } | |
1907 | xen_modified_memory(addr, length); | |
1908 | } | |
1909 | ||
1910 | static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write) | |
1911 | { | |
1912 | if (memory_region_is_ram(mr)) { | |
1913 | return !(is_write && mr->readonly); | |
1914 | } | |
1915 | if (memory_region_is_romd(mr)) { | |
1916 | return !is_write; | |
1917 | } | |
1918 | ||
1919 | return false; | |
1920 | } | |
1921 | ||
1922 | static inline int memory_access_size(MemoryRegion *mr, int l, hwaddr addr) | |
1923 | { | |
1924 | if (l >= 4 && (((addr & 3) == 0 || mr->ops->impl.unaligned))) { | |
1925 | return 4; | |
1926 | } | |
1927 | if (l >= 2 && (((addr & 1) == 0) || mr->ops->impl.unaligned)) { | |
1928 | return 2; | |
1929 | } | |
1930 | return 1; | |
1931 | } | |
1932 | ||
1933 | bool address_space_rw(AddressSpace *as, hwaddr addr, uint8_t *buf, | |
1934 | int len, bool is_write) | |
1935 | { | |
1936 | hwaddr l; | |
1937 | uint8_t *ptr; | |
1938 | uint64_t val; | |
1939 | hwaddr addr1; | |
1940 | MemoryRegion *mr; | |
1941 | bool error = false; | |
1942 | ||
1943 | while (len > 0) { | |
1944 | l = len; | |
1945 | mr = address_space_translate(as, addr, &addr1, &l, is_write); | |
1946 | ||
1947 | if (is_write) { | |
1948 | if (!memory_access_is_direct(mr, is_write)) { | |
1949 | l = memory_access_size(mr, l, addr1); | |
1950 | /* XXX: could force cpu_single_env to NULL to avoid | |
1951 | potential bugs */ | |
1952 | if (l == 4) { | |
1953 | /* 32 bit write access */ | |
1954 | val = ldl_p(buf); | |
1955 | error |= io_mem_write(mr, addr1, val, 4); | |
1956 | } else if (l == 2) { | |
1957 | /* 16 bit write access */ | |
1958 | val = lduw_p(buf); | |
1959 | error |= io_mem_write(mr, addr1, val, 2); | |
1960 | } else { | |
1961 | /* 8 bit write access */ | |
1962 | val = ldub_p(buf); | |
1963 | error |= io_mem_write(mr, addr1, val, 1); | |
1964 | } | |
1965 | } else { | |
1966 | addr1 += memory_region_get_ram_addr(mr); | |
1967 | /* RAM case */ | |
1968 | ptr = qemu_get_ram_ptr(addr1); | |
1969 | memcpy(ptr, buf, l); | |
1970 | invalidate_and_set_dirty(addr1, l); | |
1971 | } | |
1972 | } else { | |
1973 | if (!memory_access_is_direct(mr, is_write)) { | |
1974 | /* I/O case */ | |
1975 | l = memory_access_size(mr, l, addr1); | |
1976 | if (l == 4) { | |
1977 | /* 32 bit read access */ | |
1978 | error |= io_mem_read(mr, addr1, &val, 4); | |
1979 | stl_p(buf, val); | |
1980 | } else if (l == 2) { | |
1981 | /* 16 bit read access */ | |
1982 | error |= io_mem_read(mr, addr1, &val, 2); | |
1983 | stw_p(buf, val); | |
1984 | } else { | |
1985 | /* 8 bit read access */ | |
1986 | error |= io_mem_read(mr, addr1, &val, 1); | |
1987 | stb_p(buf, val); | |
1988 | } | |
1989 | } else { | |
1990 | /* RAM case */ | |
1991 | ptr = qemu_get_ram_ptr(mr->ram_addr + addr1); | |
1992 | memcpy(buf, ptr, l); | |
1993 | } | |
1994 | } | |
1995 | len -= l; | |
1996 | buf += l; | |
1997 | addr += l; | |
1998 | } | |
1999 | ||
2000 | return error; | |
2001 | } | |
2002 | ||
2003 | bool address_space_write(AddressSpace *as, hwaddr addr, | |
2004 | const uint8_t *buf, int len) | |
2005 | { | |
2006 | return address_space_rw(as, addr, (uint8_t *)buf, len, true); | |
2007 | } | |
2008 | ||
2009 | bool address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len) | |
2010 | { | |
2011 | return address_space_rw(as, addr, buf, len, false); | |
2012 | } | |
2013 | ||
2014 | ||
2015 | void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf, | |
2016 | int len, int is_write) | |
2017 | { | |
2018 | address_space_rw(&address_space_memory, addr, buf, len, is_write); | |
2019 | } | |
2020 | ||
2021 | /* used for ROM loading : can write in RAM and ROM */ | |
2022 | void cpu_physical_memory_write_rom(hwaddr addr, | |
2023 | const uint8_t *buf, int len) | |
2024 | { | |
2025 | hwaddr l; | |
2026 | uint8_t *ptr; | |
2027 | hwaddr addr1; | |
2028 | MemoryRegion *mr; | |
2029 | ||
2030 | while (len > 0) { | |
2031 | l = len; | |
2032 | mr = address_space_translate(&address_space_memory, | |
2033 | addr, &addr1, &l, true); | |
2034 | ||
2035 | if (!(memory_region_is_ram(mr) || | |
2036 | memory_region_is_romd(mr))) { | |
2037 | /* do nothing */ | |
2038 | } else { | |
2039 | addr1 += memory_region_get_ram_addr(mr); | |
2040 | /* ROM/RAM case */ | |
2041 | ptr = qemu_get_ram_ptr(addr1); | |
2042 | memcpy(ptr, buf, l); | |
2043 | invalidate_and_set_dirty(addr1, l); | |
2044 | } | |
2045 | len -= l; | |
2046 | buf += l; | |
2047 | addr += l; | |
2048 | } | |
2049 | } | |
2050 | ||
2051 | typedef struct { | |
2052 | void *buffer; | |
2053 | hwaddr addr; | |
2054 | hwaddr len; | |
2055 | } BounceBuffer; | |
2056 | ||
2057 | static BounceBuffer bounce; | |
2058 | ||
2059 | typedef struct MapClient { | |
2060 | void *opaque; | |
2061 | void (*callback)(void *opaque); | |
2062 | QLIST_ENTRY(MapClient) link; | |
2063 | } MapClient; | |
2064 | ||
2065 | static QLIST_HEAD(map_client_list, MapClient) map_client_list | |
2066 | = QLIST_HEAD_INITIALIZER(map_client_list); | |
2067 | ||
2068 | void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque)) | |
2069 | { | |
2070 | MapClient *client = g_malloc(sizeof(*client)); | |
2071 | ||
2072 | client->opaque = opaque; | |
2073 | client->callback = callback; | |
2074 | QLIST_INSERT_HEAD(&map_client_list, client, link); | |
2075 | return client; | |
2076 | } | |
2077 | ||
2078 | static void cpu_unregister_map_client(void *_client) | |
2079 | { | |
2080 | MapClient *client = (MapClient *)_client; | |
2081 | ||
2082 | QLIST_REMOVE(client, link); | |
2083 | g_free(client); | |
2084 | } | |
2085 | ||
2086 | static void cpu_notify_map_clients(void) | |
2087 | { | |
2088 | MapClient *client; | |
2089 | ||
2090 | while (!QLIST_EMPTY(&map_client_list)) { | |
2091 | client = QLIST_FIRST(&map_client_list); | |
2092 | client->callback(client->opaque); | |
2093 | cpu_unregister_map_client(client); | |
2094 | } | |
2095 | } | |
2096 | ||
2097 | bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write) | |
2098 | { | |
2099 | MemoryRegion *mr; | |
2100 | hwaddr l, xlat; | |
2101 | ||
2102 | while (len > 0) { | |
2103 | l = len; | |
2104 | mr = address_space_translate(as, addr, &xlat, &l, is_write); | |
2105 | if (!memory_access_is_direct(mr, is_write)) { | |
2106 | l = memory_access_size(mr, l, addr); | |
2107 | if (!memory_region_access_valid(mr, xlat, l, is_write)) { | |
2108 | return false; | |
2109 | } | |
2110 | } | |
2111 | ||
2112 | len -= l; | |
2113 | addr += l; | |
2114 | } | |
2115 | return true; | |
2116 | } | |
2117 | ||
2118 | /* Map a physical memory region into a host virtual address. | |
2119 | * May map a subset of the requested range, given by and returned in *plen. | |
2120 | * May return NULL if resources needed to perform the mapping are exhausted. | |
2121 | * Use only for reads OR writes - not for read-modify-write operations. | |
2122 | * Use cpu_register_map_client() to know when retrying the map operation is | |
2123 | * likely to succeed. | |
2124 | */ | |
2125 | void *address_space_map(AddressSpace *as, | |
2126 | hwaddr addr, | |
2127 | hwaddr *plen, | |
2128 | bool is_write) | |
2129 | { | |
2130 | hwaddr len = *plen; | |
2131 | hwaddr todo = 0; | |
2132 | hwaddr l, xlat; | |
2133 | MemoryRegion *mr; | |
2134 | ram_addr_t raddr = RAM_ADDR_MAX; | |
2135 | ram_addr_t rlen; | |
2136 | void *ret; | |
2137 | ||
2138 | while (len > 0) { | |
2139 | l = len; | |
2140 | mr = address_space_translate(as, addr, &xlat, &l, is_write); | |
2141 | ||
2142 | if (!memory_access_is_direct(mr, is_write)) { | |
2143 | if (todo || bounce.buffer) { | |
2144 | break; | |
2145 | } | |
2146 | bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, TARGET_PAGE_SIZE); | |
2147 | bounce.addr = addr; | |
2148 | bounce.len = l; | |
2149 | if (!is_write) { | |
2150 | address_space_read(as, addr, bounce.buffer, l); | |
2151 | } | |
2152 | ||
2153 | *plen = l; | |
2154 | return bounce.buffer; | |
2155 | } | |
2156 | if (!todo) { | |
2157 | raddr = memory_region_get_ram_addr(mr) + xlat; | |
2158 | } else { | |
2159 | if (memory_region_get_ram_addr(mr) + xlat != raddr + todo) { | |
2160 | break; | |
2161 | } | |
2162 | } | |
2163 | ||
2164 | len -= l; | |
2165 | addr += l; | |
2166 | todo += l; | |
2167 | } | |
2168 | rlen = todo; | |
2169 | ret = qemu_ram_ptr_length(raddr, &rlen); | |
2170 | *plen = rlen; | |
2171 | return ret; | |
2172 | } | |
2173 | ||
2174 | /* Unmaps a memory region previously mapped by address_space_map(). | |
2175 | * Will also mark the memory as dirty if is_write == 1. access_len gives | |
2176 | * the amount of memory that was actually read or written by the caller. | |
2177 | */ | |
2178 | void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, | |
2179 | int is_write, hwaddr access_len) | |
2180 | { | |
2181 | if (buffer != bounce.buffer) { | |
2182 | if (is_write) { | |
2183 | ram_addr_t addr1 = qemu_ram_addr_from_host_nofail(buffer); | |
2184 | while (access_len) { | |
2185 | unsigned l; | |
2186 | l = TARGET_PAGE_SIZE; | |
2187 | if (l > access_len) | |
2188 | l = access_len; | |
2189 | invalidate_and_set_dirty(addr1, l); | |
2190 | addr1 += l; | |
2191 | access_len -= l; | |
2192 | } | |
2193 | } | |
2194 | if (xen_enabled()) { | |
2195 | xen_invalidate_map_cache_entry(buffer); | |
2196 | } | |
2197 | return; | |
2198 | } | |
2199 | if (is_write) { | |
2200 | address_space_write(as, bounce.addr, bounce.buffer, access_len); | |
2201 | } | |
2202 | qemu_vfree(bounce.buffer); | |
2203 | bounce.buffer = NULL; | |
2204 | cpu_notify_map_clients(); | |
2205 | } | |
2206 | ||
2207 | void *cpu_physical_memory_map(hwaddr addr, | |
2208 | hwaddr *plen, | |
2209 | int is_write) | |
2210 | { | |
2211 | return address_space_map(&address_space_memory, addr, plen, is_write); | |
2212 | } | |
2213 | ||
2214 | void cpu_physical_memory_unmap(void *buffer, hwaddr len, | |
2215 | int is_write, hwaddr access_len) | |
2216 | { | |
2217 | return address_space_unmap(&address_space_memory, buffer, len, is_write, access_len); | |
2218 | } | |
2219 | ||
2220 | /* warning: addr must be aligned */ | |
2221 | static inline uint32_t ldl_phys_internal(hwaddr addr, | |
2222 | enum device_endian endian) | |
2223 | { | |
2224 | uint8_t *ptr; | |
2225 | uint64_t val; | |
2226 | MemoryRegion *mr; | |
2227 | hwaddr l = 4; | |
2228 | hwaddr addr1; | |
2229 | ||
2230 | mr = address_space_translate(&address_space_memory, addr, &addr1, &l, | |
2231 | false); | |
2232 | if (l < 4 || !memory_access_is_direct(mr, false)) { | |
2233 | /* I/O case */ | |
2234 | io_mem_read(mr, addr1, &val, 4); | |
2235 | #if defined(TARGET_WORDS_BIGENDIAN) | |
2236 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
2237 | val = bswap32(val); | |
2238 | } | |
2239 | #else | |
2240 | if (endian == DEVICE_BIG_ENDIAN) { | |
2241 | val = bswap32(val); | |
2242 | } | |
2243 | #endif | |
2244 | } else { | |
2245 | /* RAM case */ | |
2246 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(mr) | |
2247 | & TARGET_PAGE_MASK) | |
2248 | + addr1); | |
2249 | switch (endian) { | |
2250 | case DEVICE_LITTLE_ENDIAN: | |
2251 | val = ldl_le_p(ptr); | |
2252 | break; | |
2253 | case DEVICE_BIG_ENDIAN: | |
2254 | val = ldl_be_p(ptr); | |
2255 | break; | |
2256 | default: | |
2257 | val = ldl_p(ptr); | |
2258 | break; | |
2259 | } | |
2260 | } | |
2261 | return val; | |
2262 | } | |
2263 | ||
2264 | uint32_t ldl_phys(hwaddr addr) | |
2265 | { | |
2266 | return ldl_phys_internal(addr, DEVICE_NATIVE_ENDIAN); | |
2267 | } | |
2268 | ||
2269 | uint32_t ldl_le_phys(hwaddr addr) | |
2270 | { | |
2271 | return ldl_phys_internal(addr, DEVICE_LITTLE_ENDIAN); | |
2272 | } | |
2273 | ||
2274 | uint32_t ldl_be_phys(hwaddr addr) | |
2275 | { | |
2276 | return ldl_phys_internal(addr, DEVICE_BIG_ENDIAN); | |
2277 | } | |
2278 | ||
2279 | /* warning: addr must be aligned */ | |
2280 | static inline uint64_t ldq_phys_internal(hwaddr addr, | |
2281 | enum device_endian endian) | |
2282 | { | |
2283 | uint8_t *ptr; | |
2284 | uint64_t val; | |
2285 | MemoryRegion *mr; | |
2286 | hwaddr l = 8; | |
2287 | hwaddr addr1; | |
2288 | ||
2289 | mr = address_space_translate(&address_space_memory, addr, &addr1, &l, | |
2290 | false); | |
2291 | if (l < 8 || !memory_access_is_direct(mr, false)) { | |
2292 | /* I/O case */ | |
2293 | io_mem_read(mr, addr1, &val, 8); | |
2294 | #if defined(TARGET_WORDS_BIGENDIAN) | |
2295 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
2296 | val = bswap64(val); | |
2297 | } | |
2298 | #else | |
2299 | if (endian == DEVICE_BIG_ENDIAN) { | |
2300 | val = bswap64(val); | |
2301 | } | |
2302 | #endif | |
2303 | } else { | |
2304 | /* RAM case */ | |
2305 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(mr) | |
2306 | & TARGET_PAGE_MASK) | |
2307 | + addr1); | |
2308 | switch (endian) { | |
2309 | case DEVICE_LITTLE_ENDIAN: | |
2310 | val = ldq_le_p(ptr); | |
2311 | break; | |
2312 | case DEVICE_BIG_ENDIAN: | |
2313 | val = ldq_be_p(ptr); | |
2314 | break; | |
2315 | default: | |
2316 | val = ldq_p(ptr); | |
2317 | break; | |
2318 | } | |
2319 | } | |
2320 | return val; | |
2321 | } | |
2322 | ||
2323 | uint64_t ldq_phys(hwaddr addr) | |
2324 | { | |
2325 | return ldq_phys_internal(addr, DEVICE_NATIVE_ENDIAN); | |
2326 | } | |
2327 | ||
2328 | uint64_t ldq_le_phys(hwaddr addr) | |
2329 | { | |
2330 | return ldq_phys_internal(addr, DEVICE_LITTLE_ENDIAN); | |
2331 | } | |
2332 | ||
2333 | uint64_t ldq_be_phys(hwaddr addr) | |
2334 | { | |
2335 | return ldq_phys_internal(addr, DEVICE_BIG_ENDIAN); | |
2336 | } | |
2337 | ||
2338 | /* XXX: optimize */ | |
2339 | uint32_t ldub_phys(hwaddr addr) | |
2340 | { | |
2341 | uint8_t val; | |
2342 | cpu_physical_memory_read(addr, &val, 1); | |
2343 | return val; | |
2344 | } | |
2345 | ||
2346 | /* warning: addr must be aligned */ | |
2347 | static inline uint32_t lduw_phys_internal(hwaddr addr, | |
2348 | enum device_endian endian) | |
2349 | { | |
2350 | uint8_t *ptr; | |
2351 | uint64_t val; | |
2352 | MemoryRegion *mr; | |
2353 | hwaddr l = 2; | |
2354 | hwaddr addr1; | |
2355 | ||
2356 | mr = address_space_translate(&address_space_memory, addr, &addr1, &l, | |
2357 | false); | |
2358 | if (l < 2 || !memory_access_is_direct(mr, false)) { | |
2359 | /* I/O case */ | |
2360 | io_mem_read(mr, addr1, &val, 2); | |
2361 | #if defined(TARGET_WORDS_BIGENDIAN) | |
2362 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
2363 | val = bswap16(val); | |
2364 | } | |
2365 | #else | |
2366 | if (endian == DEVICE_BIG_ENDIAN) { | |
2367 | val = bswap16(val); | |
2368 | } | |
2369 | #endif | |
2370 | } else { | |
2371 | /* RAM case */ | |
2372 | ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(mr) | |
2373 | & TARGET_PAGE_MASK) | |
2374 | + addr1); | |
2375 | switch (endian) { | |
2376 | case DEVICE_LITTLE_ENDIAN: | |
2377 | val = lduw_le_p(ptr); | |
2378 | break; | |
2379 | case DEVICE_BIG_ENDIAN: | |
2380 | val = lduw_be_p(ptr); | |
2381 | break; | |
2382 | default: | |
2383 | val = lduw_p(ptr); | |
2384 | break; | |
2385 | } | |
2386 | } | |
2387 | return val; | |
2388 | } | |
2389 | ||
2390 | uint32_t lduw_phys(hwaddr addr) | |
2391 | { | |
2392 | return lduw_phys_internal(addr, DEVICE_NATIVE_ENDIAN); | |
2393 | } | |
2394 | ||
2395 | uint32_t lduw_le_phys(hwaddr addr) | |
2396 | { | |
2397 | return lduw_phys_internal(addr, DEVICE_LITTLE_ENDIAN); | |
2398 | } | |
2399 | ||
2400 | uint32_t lduw_be_phys(hwaddr addr) | |
2401 | { | |
2402 | return lduw_phys_internal(addr, DEVICE_BIG_ENDIAN); | |
2403 | } | |
2404 | ||
2405 | /* warning: addr must be aligned. The ram page is not masked as dirty | |
2406 | and the code inside is not invalidated. It is useful if the dirty | |
2407 | bits are used to track modified PTEs */ | |
2408 | void stl_phys_notdirty(hwaddr addr, uint32_t val) | |
2409 | { | |
2410 | uint8_t *ptr; | |
2411 | MemoryRegion *mr; | |
2412 | hwaddr l = 4; | |
2413 | hwaddr addr1; | |
2414 | ||
2415 | mr = address_space_translate(&address_space_memory, addr, &addr1, &l, | |
2416 | true); | |
2417 | if (l < 4 || !memory_access_is_direct(mr, true)) { | |
2418 | io_mem_write(mr, addr1, val, 4); | |
2419 | } else { | |
2420 | addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK; | |
2421 | ptr = qemu_get_ram_ptr(addr1); | |
2422 | stl_p(ptr, val); | |
2423 | ||
2424 | if (unlikely(in_migration)) { | |
2425 | if (!cpu_physical_memory_is_dirty(addr1)) { | |
2426 | /* invalidate code */ | |
2427 | tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); | |
2428 | /* set dirty bit */ | |
2429 | cpu_physical_memory_set_dirty_flags( | |
2430 | addr1, (0xff & ~CODE_DIRTY_FLAG)); | |
2431 | } | |
2432 | } | |
2433 | } | |
2434 | } | |
2435 | ||
2436 | /* warning: addr must be aligned */ | |
2437 | static inline void stl_phys_internal(hwaddr addr, uint32_t val, | |
2438 | enum device_endian endian) | |
2439 | { | |
2440 | uint8_t *ptr; | |
2441 | MemoryRegion *mr; | |
2442 | hwaddr l = 4; | |
2443 | hwaddr addr1; | |
2444 | ||
2445 | mr = address_space_translate(&address_space_memory, addr, &addr1, &l, | |
2446 | true); | |
2447 | if (l < 4 || !memory_access_is_direct(mr, true)) { | |
2448 | #if defined(TARGET_WORDS_BIGENDIAN) | |
2449 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
2450 | val = bswap32(val); | |
2451 | } | |
2452 | #else | |
2453 | if (endian == DEVICE_BIG_ENDIAN) { | |
2454 | val = bswap32(val); | |
2455 | } | |
2456 | #endif | |
2457 | io_mem_write(mr, addr1, val, 4); | |
2458 | } else { | |
2459 | /* RAM case */ | |
2460 | addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK; | |
2461 | ptr = qemu_get_ram_ptr(addr1); | |
2462 | switch (endian) { | |
2463 | case DEVICE_LITTLE_ENDIAN: | |
2464 | stl_le_p(ptr, val); | |
2465 | break; | |
2466 | case DEVICE_BIG_ENDIAN: | |
2467 | stl_be_p(ptr, val); | |
2468 | break; | |
2469 | default: | |
2470 | stl_p(ptr, val); | |
2471 | break; | |
2472 | } | |
2473 | invalidate_and_set_dirty(addr1, 4); | |
2474 | } | |
2475 | } | |
2476 | ||
2477 | void stl_phys(hwaddr addr, uint32_t val) | |
2478 | { | |
2479 | stl_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN); | |
2480 | } | |
2481 | ||
2482 | void stl_le_phys(hwaddr addr, uint32_t val) | |
2483 | { | |
2484 | stl_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN); | |
2485 | } | |
2486 | ||
2487 | void stl_be_phys(hwaddr addr, uint32_t val) | |
2488 | { | |
2489 | stl_phys_internal(addr, val, DEVICE_BIG_ENDIAN); | |
2490 | } | |
2491 | ||
2492 | /* XXX: optimize */ | |
2493 | void stb_phys(hwaddr addr, uint32_t val) | |
2494 | { | |
2495 | uint8_t v = val; | |
2496 | cpu_physical_memory_write(addr, &v, 1); | |
2497 | } | |
2498 | ||
2499 | /* warning: addr must be aligned */ | |
2500 | static inline void stw_phys_internal(hwaddr addr, uint32_t val, | |
2501 | enum device_endian endian) | |
2502 | { | |
2503 | uint8_t *ptr; | |
2504 | MemoryRegion *mr; | |
2505 | hwaddr l = 2; | |
2506 | hwaddr addr1; | |
2507 | ||
2508 | mr = address_space_translate(&address_space_memory, addr, &addr1, &l, | |
2509 | true); | |
2510 | if (l < 2 || !memory_access_is_direct(mr, true)) { | |
2511 | #if defined(TARGET_WORDS_BIGENDIAN) | |
2512 | if (endian == DEVICE_LITTLE_ENDIAN) { | |
2513 | val = bswap16(val); | |
2514 | } | |
2515 | #else | |
2516 | if (endian == DEVICE_BIG_ENDIAN) { | |
2517 | val = bswap16(val); | |
2518 | } | |
2519 | #endif | |
2520 | io_mem_write(mr, addr1, val, 2); | |
2521 | } else { | |
2522 | /* RAM case */ | |
2523 | addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK; | |
2524 | ptr = qemu_get_ram_ptr(addr1); | |
2525 | switch (endian) { | |
2526 | case DEVICE_LITTLE_ENDIAN: | |
2527 | stw_le_p(ptr, val); | |
2528 | break; | |
2529 | case DEVICE_BIG_ENDIAN: | |
2530 | stw_be_p(ptr, val); | |
2531 | break; | |
2532 | default: | |
2533 | stw_p(ptr, val); | |
2534 | break; | |
2535 | } | |
2536 | invalidate_and_set_dirty(addr1, 2); | |
2537 | } | |
2538 | } | |
2539 | ||
2540 | void stw_phys(hwaddr addr, uint32_t val) | |
2541 | { | |
2542 | stw_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN); | |
2543 | } | |
2544 | ||
2545 | void stw_le_phys(hwaddr addr, uint32_t val) | |
2546 | { | |
2547 | stw_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN); | |
2548 | } | |
2549 | ||
2550 | void stw_be_phys(hwaddr addr, uint32_t val) | |
2551 | { | |
2552 | stw_phys_internal(addr, val, DEVICE_BIG_ENDIAN); | |
2553 | } | |
2554 | ||
2555 | /* XXX: optimize */ | |
2556 | void stq_phys(hwaddr addr, uint64_t val) | |
2557 | { | |
2558 | val = tswap64(val); | |
2559 | cpu_physical_memory_write(addr, &val, 8); | |
2560 | } | |
2561 | ||
2562 | void stq_le_phys(hwaddr addr, uint64_t val) | |
2563 | { | |
2564 | val = cpu_to_le64(val); | |
2565 | cpu_physical_memory_write(addr, &val, 8); | |
2566 | } | |
2567 | ||
2568 | void stq_be_phys(hwaddr addr, uint64_t val) | |
2569 | { | |
2570 | val = cpu_to_be64(val); | |
2571 | cpu_physical_memory_write(addr, &val, 8); | |
2572 | } | |
2573 | ||
2574 | /* virtual memory access for debug (includes writing to ROM) */ | |
2575 | int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr, | |
2576 | uint8_t *buf, int len, int is_write) | |
2577 | { | |
2578 | int l; | |
2579 | hwaddr phys_addr; | |
2580 | target_ulong page; | |
2581 | ||
2582 | while (len > 0) { | |
2583 | page = addr & TARGET_PAGE_MASK; | |
2584 | phys_addr = cpu_get_phys_page_debug(env, page); | |
2585 | /* if no physical page mapped, return an error */ | |
2586 | if (phys_addr == -1) | |
2587 | return -1; | |
2588 | l = (page + TARGET_PAGE_SIZE) - addr; | |
2589 | if (l > len) | |
2590 | l = len; | |
2591 | phys_addr += (addr & ~TARGET_PAGE_MASK); | |
2592 | if (is_write) | |
2593 | cpu_physical_memory_write_rom(phys_addr, buf, l); | |
2594 | else | |
2595 | cpu_physical_memory_rw(phys_addr, buf, l, is_write); | |
2596 | len -= l; | |
2597 | buf += l; | |
2598 | addr += l; | |
2599 | } | |
2600 | return 0; | |
2601 | } | |
2602 | #endif | |
2603 | ||
2604 | #if !defined(CONFIG_USER_ONLY) | |
2605 | ||
2606 | /* | |
2607 | * A helper function for the _utterly broken_ virtio device model to find out if | |
2608 | * it's running on a big endian machine. Don't do this at home kids! | |
2609 | */ | |
2610 | bool virtio_is_big_endian(void); | |
2611 | bool virtio_is_big_endian(void) | |
2612 | { | |
2613 | #if defined(TARGET_WORDS_BIGENDIAN) | |
2614 | return true; | |
2615 | #else | |
2616 | return false; | |
2617 | #endif | |
2618 | } | |
2619 | ||
2620 | #endif | |
2621 | ||
2622 | #ifndef CONFIG_USER_ONLY | |
2623 | bool cpu_physical_memory_is_io(hwaddr phys_addr) | |
2624 | { | |
2625 | MemoryRegion*mr; | |
2626 | hwaddr l = 1; | |
2627 | ||
2628 | mr = address_space_translate(&address_space_memory, | |
2629 | phys_addr, &phys_addr, &l, false); | |
2630 | ||
2631 | return !(memory_region_is_ram(mr) || | |
2632 | memory_region_is_romd(mr)); | |
2633 | } | |
2634 | #endif |