2 * Physical memory management
4 * Copyright 2011 Red Hat, Inc. and/or its affiliates
7 * Avi Kivity <avi@redhat.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
12 * Contributions after 2012-01-13 are licensed under the terms of the
13 * GNU GPL, version 2 or (at your option) any later version.
16 #include "exec/memory.h"
17 #include "exec/address-spaces.h"
18 #include "exec/ioport.h"
19 #include "qapi/visitor.h"
20 #include "qemu/bitops.h"
21 #include "qom/object.h"
25 #include "exec/memory-internal.h"
26 #include "exec/ram_addr.h"
27 #include "sysemu/sysemu.h"
29 //#define DEBUG_UNASSIGNED
31 static unsigned memory_region_transaction_depth;
32 static bool memory_region_update_pending;
33 static bool ioeventfd_update_pending;
34 static bool global_dirty_log = false;
36 /* flat_view_mutex is taken around reading as->current_map; the critical
37 * section is extremely short, so I'm using a single mutex for every AS.
38 * We could also RCU for the read-side.
40 * The BQL is taken around transaction commits, hence both locks are taken
41 * while writing to as->current_map (with the BQL taken outside).
43 static QemuMutex flat_view_mutex;
45 static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners
46 = QTAILQ_HEAD_INITIALIZER(memory_listeners);
48 static QTAILQ_HEAD(, AddressSpace) address_spaces
49 = QTAILQ_HEAD_INITIALIZER(address_spaces);
51 static void memory_init(void)
53 qemu_mutex_init(&flat_view_mutex);
56 typedef struct AddrRange AddrRange;
59 * Note that signed integers are needed for negative offsetting in aliases
60 * (large MemoryRegion::alias_offset).
67 static AddrRange addrrange_make(Int128 start, Int128 size)
69 return (AddrRange) { start, size };
72 static bool addrrange_equal(AddrRange r1, AddrRange r2)
74 return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size);
77 static Int128 addrrange_end(AddrRange r)
79 return int128_add(r.start, r.size);
82 static AddrRange addrrange_shift(AddrRange range, Int128 delta)
84 int128_addto(&range.start, delta);
88 static bool addrrange_contains(AddrRange range, Int128 addr)
90 return int128_ge(addr, range.start)
91 && int128_lt(addr, addrrange_end(range));
94 static bool addrrange_intersects(AddrRange r1, AddrRange r2)
96 return addrrange_contains(r1, r2.start)
97 || addrrange_contains(r2, r1.start);
100 static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
102 Int128 start = int128_max(r1.start, r2.start);
103 Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2));
104 return addrrange_make(start, int128_sub(end, start));
107 enum ListenerDirection { Forward, Reverse };
109 static bool memory_listener_match(MemoryListener *listener,
110 MemoryRegionSection *section)
112 return !listener->address_space_filter
113 || listener->address_space_filter == section->address_space;
116 #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
118 MemoryListener *_listener; \
120 switch (_direction) { \
122 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
123 if (_listener->_callback) { \
124 _listener->_callback(_listener, ##_args); \
129 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
130 memory_listeners, link) { \
131 if (_listener->_callback) { \
132 _listener->_callback(_listener, ##_args); \
141 #define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
143 MemoryListener *_listener; \
145 switch (_direction) { \
147 QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
148 if (_listener->_callback \
149 && memory_listener_match(_listener, _section)) { \
150 _listener->_callback(_listener, _section, ##_args); \
155 QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
156 memory_listeners, link) { \
157 if (_listener->_callback \
158 && memory_listener_match(_listener, _section)) { \
159 _listener->_callback(_listener, _section, ##_args); \
168 /* No need to ref/unref .mr, the FlatRange keeps it alive. */
169 #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
170 MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
172 .address_space = (as), \
173 .offset_within_region = (fr)->offset_in_region, \
174 .size = (fr)->addr.size, \
175 .offset_within_address_space = int128_get64((fr)->addr.start), \
176 .readonly = (fr)->readonly, \
179 struct CoalescedMemoryRange {
181 QTAILQ_ENTRY(CoalescedMemoryRange) link;
184 struct MemoryRegionIoeventfd {
191 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a,
192 MemoryRegionIoeventfd b)
194 if (int128_lt(a.addr.start, b.addr.start)) {
196 } else if (int128_gt(a.addr.start, b.addr.start)) {
198 } else if (int128_lt(a.addr.size, b.addr.size)) {
200 } else if (int128_gt(a.addr.size, b.addr.size)) {
202 } else if (a.match_data < b.match_data) {
204 } else if (a.match_data > b.match_data) {
206 } else if (a.match_data) {
207 if (a.data < b.data) {
209 } else if (a.data > b.data) {
215 } else if (a.e > b.e) {
221 static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a,
222 MemoryRegionIoeventfd b)
224 return !memory_region_ioeventfd_before(a, b)
225 && !memory_region_ioeventfd_before(b, a);
228 typedef struct FlatRange FlatRange;
229 typedef struct FlatView FlatView;
231 /* Range of memory in the global map. Addresses are absolute. */
234 hwaddr offset_in_region;
236 uint8_t dirty_log_mask;
241 /* Flattened global view of current active memory hierarchy. Kept in sorted
248 unsigned nr_allocated;
251 typedef struct AddressSpaceOps AddressSpaceOps;
253 #define FOR_EACH_FLAT_RANGE(var, view) \
254 for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
256 static bool flatrange_equal(FlatRange *a, FlatRange *b)
258 return a->mr == b->mr
259 && addrrange_equal(a->addr, b->addr)
260 && a->offset_in_region == b->offset_in_region
261 && a->romd_mode == b->romd_mode
262 && a->readonly == b->readonly;
265 static void flatview_init(FlatView *view)
270 view->nr_allocated = 0;
273 /* Insert a range into a given position. Caller is responsible for maintaining
276 static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range)
278 if (view->nr == view->nr_allocated) {
279 view->nr_allocated = MAX(2 * view->nr, 10);
280 view->ranges = g_realloc(view->ranges,
281 view->nr_allocated * sizeof(*view->ranges));
283 memmove(view->ranges + pos + 1, view->ranges + pos,
284 (view->nr - pos) * sizeof(FlatRange));
285 view->ranges[pos] = *range;
286 memory_region_ref(range->mr);
290 static void flatview_destroy(FlatView *view)
294 for (i = 0; i < view->nr; i++) {
295 memory_region_unref(view->ranges[i].mr);
297 g_free(view->ranges);
301 static void flatview_ref(FlatView *view)
303 atomic_inc(&view->ref);
306 static void flatview_unref(FlatView *view)
308 if (atomic_fetch_dec(&view->ref) == 1) {
309 flatview_destroy(view);
313 static bool can_merge(FlatRange *r1, FlatRange *r2)
315 return int128_eq(addrrange_end(r1->addr), r2->addr.start)
317 && int128_eq(int128_add(int128_make64(r1->offset_in_region),
319 int128_make64(r2->offset_in_region))
320 && r1->dirty_log_mask == r2->dirty_log_mask
321 && r1->romd_mode == r2->romd_mode
322 && r1->readonly == r2->readonly;
325 /* Attempt to simplify a view by merging adjacent ranges */
326 static void flatview_simplify(FlatView *view)
331 while (i < view->nr) {
334 && can_merge(&view->ranges[j-1], &view->ranges[j])) {
335 int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size);
339 memmove(&view->ranges[i], &view->ranges[j],
340 (view->nr - j) * sizeof(view->ranges[j]));
345 static bool memory_region_big_endian(MemoryRegion *mr)
347 #ifdef TARGET_WORDS_BIGENDIAN
348 return mr->ops->endianness != DEVICE_LITTLE_ENDIAN;
350 return mr->ops->endianness == DEVICE_BIG_ENDIAN;
354 static bool memory_region_wrong_endianness(MemoryRegion *mr)
356 #ifdef TARGET_WORDS_BIGENDIAN
357 return mr->ops->endianness == DEVICE_LITTLE_ENDIAN;
359 return mr->ops->endianness == DEVICE_BIG_ENDIAN;
363 static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
365 if (memory_region_wrong_endianness(mr)) {
370 *data = bswap16(*data);
373 *data = bswap32(*data);
376 *data = bswap64(*data);
384 static void memory_region_oldmmio_read_accessor(MemoryRegion *mr,
393 tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr);
394 trace_memory_region_ops_read(mr, addr, tmp, size);
395 *value |= (tmp & mask) << shift;
398 static void memory_region_read_accessor(MemoryRegion *mr,
407 if (mr->flush_coalesced_mmio) {
408 qemu_flush_coalesced_mmio_buffer();
410 tmp = mr->ops->read(mr->opaque, addr, size);
411 trace_memory_region_ops_read(mr, addr, tmp, size);
412 *value |= (tmp & mask) << shift;
415 static void memory_region_oldmmio_write_accessor(MemoryRegion *mr,
424 tmp = (*value >> shift) & mask;
425 trace_memory_region_ops_write(mr, addr, tmp, size);
426 mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp);
429 static void memory_region_write_accessor(MemoryRegion *mr,
438 if (mr->flush_coalesced_mmio) {
439 qemu_flush_coalesced_mmio_buffer();
441 tmp = (*value >> shift) & mask;
442 trace_memory_region_ops_write(mr, addr, tmp, size);
443 mr->ops->write(mr->opaque, addr, tmp, size);
446 static void access_with_adjusted_size(hwaddr addr,
449 unsigned access_size_min,
450 unsigned access_size_max,
451 void (*access)(MemoryRegion *mr,
459 uint64_t access_mask;
460 unsigned access_size;
463 if (!access_size_min) {
466 if (!access_size_max) {
470 /* FIXME: support unaligned access? */
471 access_size = MAX(MIN(size, access_size_max), access_size_min);
472 access_mask = -1ULL >> (64 - access_size * 8);
473 if (memory_region_big_endian(mr)) {
474 for (i = 0; i < size; i += access_size) {
475 access(mr, addr + i, value, access_size,
476 (size - access_size - i) * 8, access_mask);
479 for (i = 0; i < size; i += access_size) {
480 access(mr, addr + i, value, access_size, i * 8, access_mask);
485 static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
489 while (mr->container) {
492 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
493 if (mr == as->root) {
500 /* Render a memory region into the global view. Ranges in @view obscure
503 static void render_memory_region(FlatView *view,
509 MemoryRegion *subregion;
511 hwaddr offset_in_region;
521 int128_addto(&base, int128_make64(mr->addr));
522 readonly |= mr->readonly;
524 tmp = addrrange_make(base, mr->size);
526 if (!addrrange_intersects(tmp, clip)) {
530 clip = addrrange_intersection(tmp, clip);
533 int128_subfrom(&base, int128_make64(mr->alias->addr));
534 int128_subfrom(&base, int128_make64(mr->alias_offset));
535 render_memory_region(view, mr->alias, base, clip, readonly);
539 /* Render subregions in priority order. */
540 QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
541 render_memory_region(view, subregion, base, clip, readonly);
544 if (!mr->terminates) {
548 offset_in_region = int128_get64(int128_sub(clip.start, base));
553 fr.dirty_log_mask = mr->dirty_log_mask;
554 fr.romd_mode = mr->romd_mode;
555 fr.readonly = readonly;
557 /* Render the region itself into any gaps left by the current view. */
558 for (i = 0; i < view->nr && int128_nz(remain); ++i) {
559 if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
562 if (int128_lt(base, view->ranges[i].addr.start)) {
563 now = int128_min(remain,
564 int128_sub(view->ranges[i].addr.start, base));
565 fr.offset_in_region = offset_in_region;
566 fr.addr = addrrange_make(base, now);
567 flatview_insert(view, i, &fr);
569 int128_addto(&base, now);
570 offset_in_region += int128_get64(now);
571 int128_subfrom(&remain, now);
573 now = int128_sub(int128_min(int128_add(base, remain),
574 addrrange_end(view->ranges[i].addr)),
576 int128_addto(&base, now);
577 offset_in_region += int128_get64(now);
578 int128_subfrom(&remain, now);
580 if (int128_nz(remain)) {
581 fr.offset_in_region = offset_in_region;
582 fr.addr = addrrange_make(base, remain);
583 flatview_insert(view, i, &fr);
587 /* Render a memory topology into a list of disjoint absolute ranges. */
588 static FlatView *generate_memory_topology(MemoryRegion *mr)
592 view = g_new(FlatView, 1);
596 render_memory_region(view, mr, int128_zero(),
597 addrrange_make(int128_zero(), int128_2_64()), false);
599 flatview_simplify(view);
604 static void address_space_add_del_ioeventfds(AddressSpace *as,
605 MemoryRegionIoeventfd *fds_new,
607 MemoryRegionIoeventfd *fds_old,
611 MemoryRegionIoeventfd *fd;
612 MemoryRegionSection section;
614 /* Generate a symmetric difference of the old and new fd sets, adding
615 * and deleting as necessary.
619 while (iold < fds_old_nb || inew < fds_new_nb) {
620 if (iold < fds_old_nb
621 && (inew == fds_new_nb
622 || memory_region_ioeventfd_before(fds_old[iold],
625 section = (MemoryRegionSection) {
627 .offset_within_address_space = int128_get64(fd->addr.start),
628 .size = fd->addr.size,
630 MEMORY_LISTENER_CALL(eventfd_del, Forward, §ion,
631 fd->match_data, fd->data, fd->e);
633 } else if (inew < fds_new_nb
634 && (iold == fds_old_nb
635 || memory_region_ioeventfd_before(fds_new[inew],
638 section = (MemoryRegionSection) {
640 .offset_within_address_space = int128_get64(fd->addr.start),
641 .size = fd->addr.size,
643 MEMORY_LISTENER_CALL(eventfd_add, Reverse, §ion,
644 fd->match_data, fd->data, fd->e);
653 static FlatView *address_space_get_flatview(AddressSpace *as)
657 qemu_mutex_lock(&flat_view_mutex);
658 view = as->current_map;
660 qemu_mutex_unlock(&flat_view_mutex);
664 static void address_space_update_ioeventfds(AddressSpace *as)
668 unsigned ioeventfd_nb = 0;
669 MemoryRegionIoeventfd *ioeventfds = NULL;
673 view = address_space_get_flatview(as);
674 FOR_EACH_FLAT_RANGE(fr, view) {
675 for (i = 0; i < fr->mr->ioeventfd_nb; ++i) {
676 tmp = addrrange_shift(fr->mr->ioeventfds[i].addr,
677 int128_sub(fr->addr.start,
678 int128_make64(fr->offset_in_region)));
679 if (addrrange_intersects(fr->addr, tmp)) {
681 ioeventfds = g_realloc(ioeventfds,
682 ioeventfd_nb * sizeof(*ioeventfds));
683 ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
684 ioeventfds[ioeventfd_nb-1].addr = tmp;
689 address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb,
690 as->ioeventfds, as->ioeventfd_nb);
692 g_free(as->ioeventfds);
693 as->ioeventfds = ioeventfds;
694 as->ioeventfd_nb = ioeventfd_nb;
695 flatview_unref(view);
698 static void address_space_update_topology_pass(AddressSpace *as,
699 const FlatView *old_view,
700 const FlatView *new_view,
704 FlatRange *frold, *frnew;
706 /* Generate a symmetric difference of the old and new memory maps.
707 * Kill ranges in the old map, and instantiate ranges in the new map.
710 while (iold < old_view->nr || inew < new_view->nr) {
711 if (iold < old_view->nr) {
712 frold = &old_view->ranges[iold];
716 if (inew < new_view->nr) {
717 frnew = &new_view->ranges[inew];
724 || int128_lt(frold->addr.start, frnew->addr.start)
725 || (int128_eq(frold->addr.start, frnew->addr.start)
726 && !flatrange_equal(frold, frnew)))) {
727 /* In old but not in new, or in both but attributes changed. */
730 MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del);
734 } else if (frold && frnew && flatrange_equal(frold, frnew)) {
735 /* In both and unchanged (except logging may have changed) */
738 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop);
739 if (frold->dirty_log_mask && !frnew->dirty_log_mask) {
740 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop);
741 } else if (frnew->dirty_log_mask && !frold->dirty_log_mask) {
742 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start);
752 MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add);
761 static void address_space_update_topology(AddressSpace *as)
763 FlatView *old_view = address_space_get_flatview(as);
764 FlatView *new_view = generate_memory_topology(as->root);
766 address_space_update_topology_pass(as, old_view, new_view, false);
767 address_space_update_topology_pass(as, old_view, new_view, true);
769 qemu_mutex_lock(&flat_view_mutex);
770 flatview_unref(as->current_map);
771 as->current_map = new_view;
772 qemu_mutex_unlock(&flat_view_mutex);
774 /* Note that all the old MemoryRegions are still alive up to this
775 * point. This relieves most MemoryListeners from the need to
776 * ref/unref the MemoryRegions they get---unless they use them
777 * outside the iothread mutex, in which case precise reference
778 * counting is necessary.
780 flatview_unref(old_view);
782 address_space_update_ioeventfds(as);
785 void memory_region_transaction_begin(void)
787 qemu_flush_coalesced_mmio_buffer();
788 ++memory_region_transaction_depth;
791 static void memory_region_clear_pending(void)
793 memory_region_update_pending = false;
794 ioeventfd_update_pending = false;
797 void memory_region_transaction_commit(void)
801 assert(memory_region_transaction_depth);
802 --memory_region_transaction_depth;
803 if (!memory_region_transaction_depth) {
804 if (memory_region_update_pending) {
805 MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
807 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
808 address_space_update_topology(as);
811 MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
812 } else if (ioeventfd_update_pending) {
813 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
814 address_space_update_ioeventfds(as);
817 memory_region_clear_pending();
821 static void memory_region_destructor_none(MemoryRegion *mr)
825 static void memory_region_destructor_ram(MemoryRegion *mr)
827 qemu_ram_free(mr->ram_addr);
830 static void memory_region_destructor_alias(MemoryRegion *mr)
832 memory_region_unref(mr->alias);
835 static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr)
837 qemu_ram_free_from_ptr(mr->ram_addr);
840 static void memory_region_destructor_rom_device(MemoryRegion *mr)
842 qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK);
845 static bool memory_region_need_escape(char c)
847 return c == '/' || c == '[' || c == '\\' || c == ']';
850 static char *memory_region_escape_name(const char *name)
857 for (p = name; *p; p++) {
858 bytes += memory_region_need_escape(*p) ? 4 : 1;
860 if (bytes == p - name) {
861 return g_memdup(name, bytes + 1);
864 escaped = g_malloc(bytes + 1);
865 for (p = name, q = escaped; *p; p++) {
867 if (unlikely(memory_region_need_escape(c))) {
870 *q++ = "0123456789abcdef"[c >> 4];
871 c = "0123456789abcdef"[c & 15];
879 void memory_region_init(MemoryRegion *mr,
885 owner = qdev_get_machine();
888 object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION);
889 mr->size = int128_make64(size);
890 if (size == UINT64_MAX) {
891 mr->size = int128_2_64();
893 mr->name = g_strdup(name);
896 char *escaped_name = memory_region_escape_name(name);
897 char *name_array = g_strdup_printf("%s[*]", escaped_name);
898 object_property_add_child(owner, name_array, OBJECT(mr), &error_abort);
899 object_unref(OBJECT(mr));
901 g_free(escaped_name);
905 static void memory_region_get_addr(Object *obj, Visitor *v, void *opaque,
906 const char *name, Error **errp)
908 MemoryRegion *mr = MEMORY_REGION(obj);
909 uint64_t value = mr->addr;
911 visit_type_uint64(v, &value, name, errp);
914 static void memory_region_get_container(Object *obj, Visitor *v, void *opaque,
915 const char *name, Error **errp)
917 MemoryRegion *mr = MEMORY_REGION(obj);
918 gchar *path = (gchar *)"";
921 path = object_get_canonical_path(OBJECT(mr->container));
923 visit_type_str(v, &path, name, errp);
929 static Object *memory_region_resolve_container(Object *obj, void *opaque,
932 MemoryRegion *mr = MEMORY_REGION(obj);
934 return OBJECT(mr->container);
937 static void memory_region_get_priority(Object *obj, Visitor *v, void *opaque,
938 const char *name, Error **errp)
940 MemoryRegion *mr = MEMORY_REGION(obj);
941 int32_t value = mr->priority;
943 visit_type_int32(v, &value, name, errp);
946 static bool memory_region_get_may_overlap(Object *obj, Error **errp)
948 MemoryRegion *mr = MEMORY_REGION(obj);
950 return mr->may_overlap;
953 static void memory_region_get_size(Object *obj, Visitor *v, void *opaque,
954 const char *name, Error **errp)
956 MemoryRegion *mr = MEMORY_REGION(obj);
957 uint64_t value = memory_region_size(mr);
959 visit_type_uint64(v, &value, name, errp);
962 static void memory_region_initfn(Object *obj)
964 MemoryRegion *mr = MEMORY_REGION(obj);
967 mr->ops = &unassigned_mem_ops;
969 mr->romd_mode = true;
970 mr->destructor = memory_region_destructor_none;
971 QTAILQ_INIT(&mr->subregions);
972 QTAILQ_INIT(&mr->coalesced);
974 op = object_property_add(OBJECT(mr), "container",
975 "link<" TYPE_MEMORY_REGION ">",
976 memory_region_get_container,
977 NULL, /* memory_region_set_container */
978 NULL, NULL, &error_abort);
979 op->resolve = memory_region_resolve_container;
981 object_property_add(OBJECT(mr), "addr", "uint64",
982 memory_region_get_addr,
983 NULL, /* memory_region_set_addr */
984 NULL, NULL, &error_abort);
985 object_property_add(OBJECT(mr), "priority", "uint32",
986 memory_region_get_priority,
987 NULL, /* memory_region_set_priority */
988 NULL, NULL, &error_abort);
989 object_property_add_bool(OBJECT(mr), "may-overlap",
990 memory_region_get_may_overlap,
991 NULL, /* memory_region_set_may_overlap */
993 object_property_add(OBJECT(mr), "size", "uint64",
994 memory_region_get_size,
995 NULL, /* memory_region_set_size, */
996 NULL, NULL, &error_abort);
999 static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
1002 #ifdef DEBUG_UNASSIGNED
1003 printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
1005 if (current_cpu != NULL) {
1006 cpu_unassigned_access(current_cpu, addr, false, false, 0, size);
1011 static void unassigned_mem_write(void *opaque, hwaddr addr,
1012 uint64_t val, unsigned size)
1014 #ifdef DEBUG_UNASSIGNED
1015 printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val);
1017 if (current_cpu != NULL) {
1018 cpu_unassigned_access(current_cpu, addr, true, false, 0, size);
1022 static bool unassigned_mem_accepts(void *opaque, hwaddr addr,
1023 unsigned size, bool is_write)
1028 const MemoryRegionOps unassigned_mem_ops = {
1029 .valid.accepts = unassigned_mem_accepts,
1030 .endianness = DEVICE_NATIVE_ENDIAN,
1033 bool memory_region_access_valid(MemoryRegion *mr,
1038 int access_size_min, access_size_max;
1041 if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
1045 if (!mr->ops->valid.accepts) {
1049 access_size_min = mr->ops->valid.min_access_size;
1050 if (!mr->ops->valid.min_access_size) {
1051 access_size_min = 1;
1054 access_size_max = mr->ops->valid.max_access_size;
1055 if (!mr->ops->valid.max_access_size) {
1056 access_size_max = 4;
1059 access_size = MAX(MIN(size, access_size_max), access_size_min);
1060 for (i = 0; i < size; i += access_size) {
1061 if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size,
1070 static uint64_t memory_region_dispatch_read1(MemoryRegion *mr,
1076 if (mr->ops->read) {
1077 access_with_adjusted_size(addr, &data, size,
1078 mr->ops->impl.min_access_size,
1079 mr->ops->impl.max_access_size,
1080 memory_region_read_accessor, mr);
1082 access_with_adjusted_size(addr, &data, size, 1, 4,
1083 memory_region_oldmmio_read_accessor, mr);
1089 static bool memory_region_dispatch_read(MemoryRegion *mr,
1094 if (!memory_region_access_valid(mr, addr, size, false)) {
1095 *pval = unassigned_mem_read(mr, addr, size);
1099 *pval = memory_region_dispatch_read1(mr, addr, size);
1100 adjust_endianness(mr, pval, size);
1104 static bool memory_region_dispatch_write(MemoryRegion *mr,
1109 if (!memory_region_access_valid(mr, addr, size, true)) {
1110 unassigned_mem_write(mr, addr, data, size);
1114 adjust_endianness(mr, &data, size);
1116 if (mr->ops->write) {
1117 access_with_adjusted_size(addr, &data, size,
1118 mr->ops->impl.min_access_size,
1119 mr->ops->impl.max_access_size,
1120 memory_region_write_accessor, mr);
1122 access_with_adjusted_size(addr, &data, size, 1, 4,
1123 memory_region_oldmmio_write_accessor, mr);
1128 void memory_region_init_io(MemoryRegion *mr,
1130 const MemoryRegionOps *ops,
1135 memory_region_init(mr, owner, name, size);
1137 mr->opaque = opaque;
1138 mr->terminates = true;
1139 mr->ram_addr = ~(ram_addr_t)0;
1142 void memory_region_init_ram(MemoryRegion *mr,
1148 memory_region_init(mr, owner, name, size);
1150 mr->terminates = true;
1151 mr->destructor = memory_region_destructor_ram;
1152 mr->ram_addr = qemu_ram_alloc(size, mr, errp);
1156 void memory_region_init_ram_from_file(MemoryRegion *mr,
1157 struct Object *owner,
1164 memory_region_init(mr, owner, name, size);
1166 mr->terminates = true;
1167 mr->destructor = memory_region_destructor_ram;
1168 mr->ram_addr = qemu_ram_alloc_from_file(size, mr, share, path, errp);
1172 void memory_region_init_ram_ptr(MemoryRegion *mr,
1178 memory_region_init(mr, owner, name, size);
1180 mr->terminates = true;
1181 mr->destructor = memory_region_destructor_ram_from_ptr;
1183 /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
1184 assert(ptr != NULL);
1185 mr->ram_addr = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_abort);
1188 void memory_region_set_skip_dump(MemoryRegion *mr)
1190 mr->skip_dump = true;
1193 void memory_region_init_alias(MemoryRegion *mr,
1200 memory_region_init(mr, owner, name, size);
1201 memory_region_ref(orig);
1202 mr->destructor = memory_region_destructor_alias;
1204 mr->alias_offset = offset;
1207 void memory_region_init_rom_device(MemoryRegion *mr,
1209 const MemoryRegionOps *ops,
1215 memory_region_init(mr, owner, name, size);
1217 mr->opaque = opaque;
1218 mr->terminates = true;
1219 mr->rom_device = true;
1220 mr->destructor = memory_region_destructor_rom_device;
1221 mr->ram_addr = qemu_ram_alloc(size, mr, errp);
1224 void memory_region_init_iommu(MemoryRegion *mr,
1226 const MemoryRegionIOMMUOps *ops,
1230 memory_region_init(mr, owner, name, size);
1231 mr->iommu_ops = ops,
1232 mr->terminates = true; /* then re-forwards */
1233 notifier_list_init(&mr->iommu_notify);
1236 void memory_region_init_reservation(MemoryRegion *mr,
1241 memory_region_init_io(mr, owner, &unassigned_mem_ops, mr, name, size);
1244 static void memory_region_finalize(Object *obj)
1246 MemoryRegion *mr = MEMORY_REGION(obj);
1248 assert(QTAILQ_EMPTY(&mr->subregions));
1249 assert(memory_region_transaction_depth == 0);
1251 memory_region_clear_coalescing(mr);
1252 g_free((char *)mr->name);
1253 g_free(mr->ioeventfds);
1256 Object *memory_region_owner(MemoryRegion *mr)
1258 Object *obj = OBJECT(mr);
1262 void memory_region_ref(MemoryRegion *mr)
1264 /* MMIO callbacks most likely will access data that belongs
1265 * to the owner, hence the need to ref/unref the owner whenever
1266 * the memory region is in use.
1268 * The memory region is a child of its owner. As long as the
1269 * owner doesn't call unparent itself on the memory region,
1270 * ref-ing the owner will also keep the memory region alive.
1271 * Memory regions without an owner are supposed to never go away,
1272 * but we still ref/unref them for debugging purposes.
1274 Object *obj = OBJECT(mr);
1275 if (obj && obj->parent) {
1276 object_ref(obj->parent);
1282 void memory_region_unref(MemoryRegion *mr)
1284 Object *obj = OBJECT(mr);
1285 if (obj && obj->parent) {
1286 object_unref(obj->parent);
1292 uint64_t memory_region_size(MemoryRegion *mr)
1294 if (int128_eq(mr->size, int128_2_64())) {
1297 return int128_get64(mr->size);
1300 const char *memory_region_name(const MemoryRegion *mr)
1303 ((MemoryRegion *)mr)->name =
1304 object_get_canonical_path_component(OBJECT(mr));
1309 bool memory_region_is_ram(MemoryRegion *mr)
1314 bool memory_region_is_skip_dump(MemoryRegion *mr)
1316 return mr->skip_dump;
1319 bool memory_region_is_logging(MemoryRegion *mr)
1321 return mr->dirty_log_mask;
1324 bool memory_region_is_rom(MemoryRegion *mr)
1326 return mr->ram && mr->readonly;
1329 bool memory_region_is_iommu(MemoryRegion *mr)
1331 return mr->iommu_ops;
1334 void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n)
1336 notifier_list_add(&mr->iommu_notify, n);
1339 void memory_region_unregister_iommu_notifier(Notifier *n)
1344 void memory_region_notify_iommu(MemoryRegion *mr,
1345 IOMMUTLBEntry entry)
1347 assert(memory_region_is_iommu(mr));
1348 notifier_list_notify(&mr->iommu_notify, &entry);
1351 void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
1353 uint8_t mask = 1 << client;
1355 memory_region_transaction_begin();
1356 mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask);
1357 memory_region_update_pending |= mr->enabled;
1358 memory_region_transaction_commit();
1361 bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr,
1362 hwaddr size, unsigned client)
1364 assert(mr->terminates);
1365 return cpu_physical_memory_get_dirty(mr->ram_addr + addr, size, client);
1368 void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
1371 assert(mr->terminates);
1372 cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size);
1375 bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
1376 hwaddr size, unsigned client)
1379 assert(mr->terminates);
1380 ret = cpu_physical_memory_get_dirty(mr->ram_addr + addr, size, client);
1382 cpu_physical_memory_reset_dirty(mr->ram_addr + addr, size, client);
1388 void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
1393 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1394 FlatView *view = address_space_get_flatview(as);
1395 FOR_EACH_FLAT_RANGE(fr, view) {
1397 MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
1400 flatview_unref(view);
1404 void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
1406 if (mr->readonly != readonly) {
1407 memory_region_transaction_begin();
1408 mr->readonly = readonly;
1409 memory_region_update_pending |= mr->enabled;
1410 memory_region_transaction_commit();
1414 void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode)
1416 if (mr->romd_mode != romd_mode) {
1417 memory_region_transaction_begin();
1418 mr->romd_mode = romd_mode;
1419 memory_region_update_pending |= mr->enabled;
1420 memory_region_transaction_commit();
1424 void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
1425 hwaddr size, unsigned client)
1427 assert(mr->terminates);
1428 cpu_physical_memory_reset_dirty(mr->ram_addr + addr, size, client);
1431 int memory_region_get_fd(MemoryRegion *mr)
1434 return memory_region_get_fd(mr->alias);
1437 assert(mr->terminates);
1439 return qemu_get_ram_fd(mr->ram_addr & TARGET_PAGE_MASK);
1442 void *memory_region_get_ram_ptr(MemoryRegion *mr)
1445 return memory_region_get_ram_ptr(mr->alias) + mr->alias_offset;
1448 assert(mr->terminates);
1450 return qemu_get_ram_ptr(mr->ram_addr & TARGET_PAGE_MASK);
1453 static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as)
1457 CoalescedMemoryRange *cmr;
1459 MemoryRegionSection section;
1461 view = address_space_get_flatview(as);
1462 FOR_EACH_FLAT_RANGE(fr, view) {
1464 section = (MemoryRegionSection) {
1465 .address_space = as,
1466 .offset_within_address_space = int128_get64(fr->addr.start),
1467 .size = fr->addr.size,
1470 MEMORY_LISTENER_CALL(coalesced_mmio_del, Reverse, §ion,
1471 int128_get64(fr->addr.start),
1472 int128_get64(fr->addr.size));
1473 QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
1474 tmp = addrrange_shift(cmr->addr,
1475 int128_sub(fr->addr.start,
1476 int128_make64(fr->offset_in_region)));
1477 if (!addrrange_intersects(tmp, fr->addr)) {
1480 tmp = addrrange_intersection(tmp, fr->addr);
1481 MEMORY_LISTENER_CALL(coalesced_mmio_add, Forward, §ion,
1482 int128_get64(tmp.start),
1483 int128_get64(tmp.size));
1487 flatview_unref(view);
1490 static void memory_region_update_coalesced_range(MemoryRegion *mr)
1494 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1495 memory_region_update_coalesced_range_as(mr, as);
1499 void memory_region_set_coalescing(MemoryRegion *mr)
1501 memory_region_clear_coalescing(mr);
1502 memory_region_add_coalescing(mr, 0, int128_get64(mr->size));
1505 void memory_region_add_coalescing(MemoryRegion *mr,
1509 CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
1511 cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size));
1512 QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link);
1513 memory_region_update_coalesced_range(mr);
1514 memory_region_set_flush_coalesced(mr);
1517 void memory_region_clear_coalescing(MemoryRegion *mr)
1519 CoalescedMemoryRange *cmr;
1520 bool updated = false;
1522 qemu_flush_coalesced_mmio_buffer();
1523 mr->flush_coalesced_mmio = false;
1525 while (!QTAILQ_EMPTY(&mr->coalesced)) {
1526 cmr = QTAILQ_FIRST(&mr->coalesced);
1527 QTAILQ_REMOVE(&mr->coalesced, cmr, link);
1533 memory_region_update_coalesced_range(mr);
1537 void memory_region_set_flush_coalesced(MemoryRegion *mr)
1539 mr->flush_coalesced_mmio = true;
1542 void memory_region_clear_flush_coalesced(MemoryRegion *mr)
1544 qemu_flush_coalesced_mmio_buffer();
1545 if (QTAILQ_EMPTY(&mr->coalesced)) {
1546 mr->flush_coalesced_mmio = false;
1550 void memory_region_add_eventfd(MemoryRegion *mr,
1557 MemoryRegionIoeventfd mrfd = {
1558 .addr.start = int128_make64(addr),
1559 .addr.size = int128_make64(size),
1560 .match_data = match_data,
1566 adjust_endianness(mr, &mrfd.data, size);
1567 memory_region_transaction_begin();
1568 for (i = 0; i < mr->ioeventfd_nb; ++i) {
1569 if (memory_region_ioeventfd_before(mrfd, mr->ioeventfds[i])) {
1574 mr->ioeventfds = g_realloc(mr->ioeventfds,
1575 sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
1576 memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
1577 sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
1578 mr->ioeventfds[i] = mrfd;
1579 ioeventfd_update_pending |= mr->enabled;
1580 memory_region_transaction_commit();
1583 void memory_region_del_eventfd(MemoryRegion *mr,
1590 MemoryRegionIoeventfd mrfd = {
1591 .addr.start = int128_make64(addr),
1592 .addr.size = int128_make64(size),
1593 .match_data = match_data,
1599 adjust_endianness(mr, &mrfd.data, size);
1600 memory_region_transaction_begin();
1601 for (i = 0; i < mr->ioeventfd_nb; ++i) {
1602 if (memory_region_ioeventfd_equal(mrfd, mr->ioeventfds[i])) {
1606 assert(i != mr->ioeventfd_nb);
1607 memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
1608 sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1)));
1610 mr->ioeventfds = g_realloc(mr->ioeventfds,
1611 sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1);
1612 ioeventfd_update_pending |= mr->enabled;
1613 memory_region_transaction_commit();
1616 static void memory_region_update_container_subregions(MemoryRegion *subregion)
1618 hwaddr offset = subregion->addr;
1619 MemoryRegion *mr = subregion->container;
1620 MemoryRegion *other;
1622 memory_region_transaction_begin();
1624 memory_region_ref(subregion);
1625 QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
1626 if (subregion->may_overlap || other->may_overlap) {
1629 if (int128_ge(int128_make64(offset),
1630 int128_add(int128_make64(other->addr), other->size))
1631 || int128_le(int128_add(int128_make64(offset), subregion->size),
1632 int128_make64(other->addr))) {
1636 printf("warning: subregion collision %llx/%llx (%s) "
1637 "vs %llx/%llx (%s)\n",
1638 (unsigned long long)offset,
1639 (unsigned long long)int128_get64(subregion->size),
1641 (unsigned long long)other->addr,
1642 (unsigned long long)int128_get64(other->size),
1646 QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
1647 if (subregion->priority >= other->priority) {
1648 QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
1652 QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
1654 memory_region_update_pending |= mr->enabled && subregion->enabled;
1655 memory_region_transaction_commit();
1658 static void memory_region_add_subregion_common(MemoryRegion *mr,
1660 MemoryRegion *subregion)
1662 assert(!subregion->container);
1663 subregion->container = mr;
1664 subregion->addr = offset;
1665 memory_region_update_container_subregions(subregion);
1668 void memory_region_add_subregion(MemoryRegion *mr,
1670 MemoryRegion *subregion)
1672 subregion->may_overlap = false;
1673 subregion->priority = 0;
1674 memory_region_add_subregion_common(mr, offset, subregion);
1677 void memory_region_add_subregion_overlap(MemoryRegion *mr,
1679 MemoryRegion *subregion,
1682 subregion->may_overlap = true;
1683 subregion->priority = priority;
1684 memory_region_add_subregion_common(mr, offset, subregion);
1687 void memory_region_del_subregion(MemoryRegion *mr,
1688 MemoryRegion *subregion)
1690 memory_region_transaction_begin();
1691 assert(subregion->container == mr);
1692 subregion->container = NULL;
1693 QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
1694 memory_region_unref(subregion);
1695 memory_region_update_pending |= mr->enabled && subregion->enabled;
1696 memory_region_transaction_commit();
1699 void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
1701 if (enabled == mr->enabled) {
1704 memory_region_transaction_begin();
1705 mr->enabled = enabled;
1706 memory_region_update_pending = true;
1707 memory_region_transaction_commit();
1710 static void memory_region_readd_subregion(MemoryRegion *mr)
1712 MemoryRegion *container = mr->container;
1715 memory_region_transaction_begin();
1716 memory_region_ref(mr);
1717 memory_region_del_subregion(container, mr);
1718 mr->container = container;
1719 memory_region_update_container_subregions(mr);
1720 memory_region_unref(mr);
1721 memory_region_transaction_commit();
1725 void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
1727 if (addr != mr->addr) {
1729 memory_region_readd_subregion(mr);
1733 void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
1737 if (offset == mr->alias_offset) {
1741 memory_region_transaction_begin();
1742 mr->alias_offset = offset;
1743 memory_region_update_pending |= mr->enabled;
1744 memory_region_transaction_commit();
1747 ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr)
1749 return mr->ram_addr;
1752 uint64_t memory_region_get_alignment(const MemoryRegion *mr)
1757 static int cmp_flatrange_addr(const void *addr_, const void *fr_)
1759 const AddrRange *addr = addr_;
1760 const FlatRange *fr = fr_;
1762 if (int128_le(addrrange_end(*addr), fr->addr.start)) {
1764 } else if (int128_ge(addr->start, addrrange_end(fr->addr))) {
1770 static FlatRange *flatview_lookup(FlatView *view, AddrRange addr)
1772 return bsearch(&addr, view->ranges, view->nr,
1773 sizeof(FlatRange), cmp_flatrange_addr);
1776 bool memory_region_present(MemoryRegion *container, hwaddr addr)
1778 MemoryRegion *mr = memory_region_find(container, addr, 1).mr;
1779 if (!mr || (mr == container)) {
1782 memory_region_unref(mr);
1786 bool memory_region_is_mapped(MemoryRegion *mr)
1788 return mr->container ? true : false;
1791 MemoryRegionSection memory_region_find(MemoryRegion *mr,
1792 hwaddr addr, uint64_t size)
1794 MemoryRegionSection ret = { .mr = NULL };
1802 for (root = mr; root->container; ) {
1803 root = root->container;
1807 as = memory_region_to_address_space(root);
1811 range = addrrange_make(int128_make64(addr), int128_make64(size));
1813 view = address_space_get_flatview(as);
1814 fr = flatview_lookup(view, range);
1816 flatview_unref(view);
1820 while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
1825 ret.address_space = as;
1826 range = addrrange_intersection(range, fr->addr);
1827 ret.offset_within_region = fr->offset_in_region;
1828 ret.offset_within_region += int128_get64(int128_sub(range.start,
1830 ret.size = range.size;
1831 ret.offset_within_address_space = int128_get64(range.start);
1832 ret.readonly = fr->readonly;
1833 memory_region_ref(ret.mr);
1835 flatview_unref(view);
1839 void address_space_sync_dirty_bitmap(AddressSpace *as)
1844 view = address_space_get_flatview(as);
1845 FOR_EACH_FLAT_RANGE(fr, view) {
1846 MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
1848 flatview_unref(view);
1851 void memory_global_dirty_log_start(void)
1853 global_dirty_log = true;
1854 MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward);
1857 void memory_global_dirty_log_stop(void)
1859 global_dirty_log = false;
1860 MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse);
1863 static void listener_add_address_space(MemoryListener *listener,
1869 if (listener->address_space_filter
1870 && listener->address_space_filter != as) {
1874 if (global_dirty_log) {
1875 if (listener->log_global_start) {
1876 listener->log_global_start(listener);
1880 view = address_space_get_flatview(as);
1881 FOR_EACH_FLAT_RANGE(fr, view) {
1882 MemoryRegionSection section = {
1884 .address_space = as,
1885 .offset_within_region = fr->offset_in_region,
1886 .size = fr->addr.size,
1887 .offset_within_address_space = int128_get64(fr->addr.start),
1888 .readonly = fr->readonly,
1890 if (listener->region_add) {
1891 listener->region_add(listener, §ion);
1894 flatview_unref(view);
1897 void memory_listener_register(MemoryListener *listener, AddressSpace *filter)
1899 MemoryListener *other = NULL;
1902 listener->address_space_filter = filter;
1903 if (QTAILQ_EMPTY(&memory_listeners)
1904 || listener->priority >= QTAILQ_LAST(&memory_listeners,
1905 memory_listeners)->priority) {
1906 QTAILQ_INSERT_TAIL(&memory_listeners, listener, link);
1908 QTAILQ_FOREACH(other, &memory_listeners, link) {
1909 if (listener->priority < other->priority) {
1913 QTAILQ_INSERT_BEFORE(other, listener, link);
1916 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
1917 listener_add_address_space(listener, as);
1921 void memory_listener_unregister(MemoryListener *listener)
1923 QTAILQ_REMOVE(&memory_listeners, listener, link);
1926 void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name)
1928 if (QTAILQ_EMPTY(&address_spaces)) {
1932 memory_region_transaction_begin();
1934 as->current_map = g_new(FlatView, 1);
1935 flatview_init(as->current_map);
1936 as->ioeventfd_nb = 0;
1937 as->ioeventfds = NULL;
1938 QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link);
1939 as->name = g_strdup(name ? name : "anonymous");
1940 address_space_init_dispatch(as);
1941 memory_region_update_pending |= root->enabled;
1942 memory_region_transaction_commit();
1945 void address_space_destroy(AddressSpace *as)
1947 MemoryListener *listener;
1949 /* Flush out anything from MemoryListeners listening in on this */
1950 memory_region_transaction_begin();
1952 memory_region_transaction_commit();
1953 QTAILQ_REMOVE(&address_spaces, as, address_spaces_link);
1954 address_space_destroy_dispatch(as);
1956 QTAILQ_FOREACH(listener, &memory_listeners, link) {
1957 assert(listener->address_space_filter != as);
1960 flatview_unref(as->current_map);
1962 g_free(as->ioeventfds);
1965 bool io_mem_read(MemoryRegion *mr, hwaddr addr, uint64_t *pval, unsigned size)
1967 return memory_region_dispatch_read(mr, addr, pval, size);
1970 bool io_mem_write(MemoryRegion *mr, hwaddr addr,
1971 uint64_t val, unsigned size)
1973 return memory_region_dispatch_write(mr, addr, val, size);
1976 typedef struct MemoryRegionList MemoryRegionList;
1978 struct MemoryRegionList {
1979 const MemoryRegion *mr;
1980 QTAILQ_ENTRY(MemoryRegionList) queue;
1983 typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead;
1985 static void mtree_print_mr(fprintf_function mon_printf, void *f,
1986 const MemoryRegion *mr, unsigned int level,
1988 MemoryRegionListHead *alias_print_queue)
1990 MemoryRegionList *new_ml, *ml, *next_ml;
1991 MemoryRegionListHead submr_print_queue;
1992 const MemoryRegion *submr;
1995 if (!mr || !mr->enabled) {
1999 for (i = 0; i < level; i++) {
2004 MemoryRegionList *ml;
2007 /* check if the alias is already in the queue */
2008 QTAILQ_FOREACH(ml, alias_print_queue, queue) {
2009 if (ml->mr == mr->alias) {
2015 ml = g_new(MemoryRegionList, 1);
2017 QTAILQ_INSERT_TAIL(alias_print_queue, ml, queue);
2019 mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx
2020 " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
2021 "-" TARGET_FMT_plx "\n",
2024 + (int128_nz(mr->size) ?
2025 (hwaddr)int128_get64(int128_sub(mr->size,
2026 int128_one())) : 0),
2028 mr->romd_mode ? 'R' : '-',
2029 !mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W'
2031 memory_region_name(mr),
2032 memory_region_name(mr->alias),
2035 + (int128_nz(mr->size) ?
2036 (hwaddr)int128_get64(int128_sub(mr->size,
2037 int128_one())) : 0));
2040 TARGET_FMT_plx "-" TARGET_FMT_plx " (prio %d, %c%c): %s\n",
2043 + (int128_nz(mr->size) ?
2044 (hwaddr)int128_get64(int128_sub(mr->size,
2045 int128_one())) : 0),
2047 mr->romd_mode ? 'R' : '-',
2048 !mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W'
2050 memory_region_name(mr));
2053 QTAILQ_INIT(&submr_print_queue);
2055 QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) {
2056 new_ml = g_new(MemoryRegionList, 1);
2058 QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
2059 if (new_ml->mr->addr < ml->mr->addr ||
2060 (new_ml->mr->addr == ml->mr->addr &&
2061 new_ml->mr->priority > ml->mr->priority)) {
2062 QTAILQ_INSERT_BEFORE(ml, new_ml, queue);
2068 QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, queue);
2072 QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
2073 mtree_print_mr(mon_printf, f, ml->mr, level + 1, base + mr->addr,
2077 QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, queue, next_ml) {
2082 void mtree_info(fprintf_function mon_printf, void *f)
2084 MemoryRegionListHead ml_head;
2085 MemoryRegionList *ml, *ml2;
2088 QTAILQ_INIT(&ml_head);
2090 QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
2091 mon_printf(f, "%s\n", as->name);
2092 mtree_print_mr(mon_printf, f, as->root, 0, 0, &ml_head);
2095 mon_printf(f, "aliases\n");
2096 /* print aliased regions */
2097 QTAILQ_FOREACH(ml, &ml_head, queue) {
2098 mon_printf(f, "%s\n", memory_region_name(ml->mr));
2099 mtree_print_mr(mon_printf, f, ml->mr, 0, 0, &ml_head);
2102 QTAILQ_FOREACH_SAFE(ml, &ml_head, queue, ml2) {
2107 static const TypeInfo memory_region_info = {
2108 .parent = TYPE_OBJECT,
2109 .name = TYPE_MEMORY_REGION,
2110 .instance_size = sizeof(MemoryRegion),
2111 .instance_init = memory_region_initfn,
2112 .instance_finalize = memory_region_finalize,
2115 static void memory_register_types(void)
2117 type_register_static(&memory_region_info);
2120 type_init(memory_register_types)