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825e74410f
unicorn/qemu/memory.c
Peter Maydell 825e74410f
memory: Replace io_mem_read/write with memory_region_dispatch_read/write 
Rather than retaining io_mem_read/write as simple wrappers around
the memory_region_dispatch_read/write functions, make the latter
public and change all the callers to use them, since we need to
touch all the callsites anyway to add MemTxAttrs and MemTxResult
support. Delete io_mem_read and io_mem_write entirely.

(All the callers currently pass MEMTXATTRS_UNSPECIFIED
and convert the return value back to bool or ignore it.)

Backports commit 3b6434953934e6d4a776ed426d8c6d6badee176f from qemu
2018-02-12 17:26:52 -05:00

1688 lines
52 KiB
C
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/*
* Physical memory management
*
* Copyright 2011 Red Hat, Inc. and/or its affiliates
*
* Authors:
* Avi Kivity <avi@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
/* Modified for Unicorn Engine by Nguyen Anh Quynh, 2015 */
#include "exec/memory.h"
#include "exec/address-spaces.h"
#include "exec/ioport.h"
#include "qapi/visitor.h"
#include "qemu/bitops.h"
#include "qom/object.h"
#include <assert.h>
#include "exec/memory-internal.h"
#include "exec/ram_addr.h"
#include "sysemu/sysemu.h"
//#define DEBUG_UNASSIGNED
// Unicorn engine
MemoryRegion *memory_map(struct uc_struct *uc, hwaddr begin, size_t size, uint32_t perms)
{
MemoryRegion *ram = g_new(MemoryRegion, 1);
memory_region_init_ram(uc, ram, NULL, "pc.ram", size, perms, &error_abort);
if (ram->ram_addr == -1)
// out of memory
return NULL;
memory_region_add_subregion(get_system_memory(uc), begin, ram);
if (uc->current_cpu)
tlb_flush(uc->current_cpu, 1);
return ram;
}
MemoryRegion *memory_map_ptr(struct uc_struct *uc, hwaddr begin, size_t size, uint32_t perms, void *ptr)
{
MemoryRegion *ram = g_new(MemoryRegion, 1);
memory_region_init_ram_ptr(uc, ram, NULL, "pc.ram", size, ptr);
ram->perms = perms;
if (ram->ram_addr == -1)
// out of memory
return NULL;
memory_region_add_subregion(get_system_memory(uc), begin, ram);
if (uc->current_cpu)
tlb_flush(uc->current_cpu, 1);
return ram;
}
static void memory_region_update_container_subregions(MemoryRegion *subregion);
void memory_unmap(struct uc_struct *uc, MemoryRegion *mr)
{
int i;
target_ulong addr;
Object *obj;
// Make sure all pages associated with the MemoryRegion are flushed
// Only need to do this if we are in a running state
if (uc->current_cpu) {
for (addr = mr->addr; addr < mr->end; addr += uc->target_page_size) {
tlb_flush_page(uc->current_cpu, addr);
}
}
memory_region_del_subregion(get_system_memory(uc), mr);
for (i = 0; i < uc->mapped_block_count; i++) {
if (uc->mapped_blocks[i] == mr) {
uc->mapped_block_count--;
//shift remainder of array down over deleted pointer
memmove(&uc->mapped_blocks[i], &uc->mapped_blocks[i + 1], sizeof(MemoryRegion*) * (uc->mapped_block_count - i));
mr->destructor(mr);
obj = OBJECT(mr);
obj->ref = 1;
obj->free = g_free;
g_free((char *)mr->name);
mr->name = NULL;
object_property_del_child(mr->uc, qdev_get_machine(mr->uc), obj, &error_abort);
break;
}
}
}
int memory_free(struct uc_struct *uc)
{
MemoryRegion *mr;
Object *obj;
int i;
for (i = 0; i < uc->mapped_block_count; i++) {
mr = uc->mapped_blocks[i];
mr->enabled = false;
memory_region_del_subregion(get_system_memory(uc), mr);
mr->destructor(mr);
obj = OBJECT(mr);
obj->ref = 1;
obj->free = g_free;
object_property_del_child(mr->uc, qdev_get_machine(mr->uc), obj, &error_abort);
}
return 0;
}
static void memory_init(struct uc_struct *uc)
{
}
typedef struct AddrRange AddrRange;
/*
* Note that signed integers are needed for negative offsetting in aliases
* (large MemoryRegion::alias_offset).
*/
struct AddrRange {
Int128 start;
Int128 size;
};
static AddrRange addrrange_make(Int128 start, Int128 size)
{
AddrRange ar;
ar.start = start;
ar.size = size;
return ar;
}
static bool addrrange_equal(AddrRange r1, AddrRange r2)
{
return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size);
}
static Int128 addrrange_end(AddrRange r)
{
return int128_add(r.start, r.size);
}
static bool addrrange_contains(AddrRange range, Int128 addr)
{
return int128_ge(addr, range.start)
&& int128_lt(addr, addrrange_end(range));
}
static bool addrrange_intersects(AddrRange r1, AddrRange r2)
{
return addrrange_contains(r1, r2.start)
|| addrrange_contains(r2, r1.start);
}
static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
{
Int128 start = int128_max(r1.start, r2.start);
Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2));
return addrrange_make(start, int128_sub(end, start));
}
enum ListenerDirection { Forward, Reverse };
static bool memory_listener_match(MemoryListener *listener,
MemoryRegionSection *section)
{
return !listener->address_space_filter
|| listener->address_space_filter == section->address_space;
}
#define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, ...) \
do { \
MemoryListener *_listener; \
\
switch (_direction) { \
case Forward: \
QTAILQ_FOREACH(_listener, &uc->memory_listeners, link) { \
if (_listener->_callback) { \
_listener->_callback(_listener, ##__VA_ARGS__); \
} \
} \
break; \
case Reverse: \
QTAILQ_FOREACH_REVERSE(_listener, &uc->memory_listeners, \
memory_listeners, link) { \
if (_listener->_callback) { \
_listener->_callback(_listener, ##__VA_ARGS__); \
} \
} \
break; \
default: \
abort(); \
} \
} while (0)
#define MEMORY_LISTENER_CALL(_callback, _direction, _section, ...) \
do { \
MemoryListener *_listener; \
\
switch (_direction) { \
case Forward: \
QTAILQ_FOREACH(_listener, &uc->memory_listeners, link) { \
if (_listener->_callback \
&& memory_listener_match(_listener, _section)) { \
_listener->_callback(_listener, _section, ##__VA_ARGS__); \
} \
} \
break; \
case Reverse: \
QTAILQ_FOREACH_REVERSE(_listener, &uc->memory_listeners, \
memory_listeners, link) { \
if (_listener->_callback \
&& memory_listener_match(_listener, _section)) { \
_listener->_callback(_listener, _section, ##__VA_ARGS__); \
} \
} \
break; \
default: \
abort(); \
} \
} while (0)
/* No need to ref/unref .mr, the FlatRange keeps it alive. */
#define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
do { MemoryRegionSection _mrs = MemoryRegionSection_make((fr)->mr, as, (fr)->offset_in_region, \
(fr)->addr.size, int128_get64((fr)->addr.start), (fr)->readonly); \
MEMORY_LISTENER_CALL(callback, dir, &_mrs); } while(0);
/*
MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
.mr = (fr)->mr, \
.address_space = (as), \
.offset_within_region = (fr)->offset_in_region, \
.size = (fr)->addr.size, \
.offset_within_address_space = int128_get64((fr)->addr.start), \
.readonly = (fr)->readonly, \
}))
*/
typedef struct FlatRange FlatRange;
typedef struct FlatView FlatView;
/* Range of memory in the global map. Addresses are absolute. */
struct FlatRange {
MemoryRegion *mr;
hwaddr offset_in_region;
AddrRange addr;
uint8_t dirty_log_mask;
bool romd_mode;
bool readonly;
};
/* Flattened global view of current active memory hierarchy. Kept in sorted
* order.
*/
struct FlatView {
unsigned ref;
FlatRange *ranges;
unsigned nr;
unsigned nr_allocated;
};
typedef struct AddressSpaceOps AddressSpaceOps;
#define FOR_EACH_FLAT_RANGE(var, view) \
for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
static bool flatrange_equal(FlatRange *a, FlatRange *b)
{
return a->mr == b->mr
&& addrrange_equal(a->addr, b->addr)
&& a->offset_in_region == b->offset_in_region
&& a->romd_mode == b->romd_mode
&& a->readonly == b->readonly;
}
static void flatview_init(FlatView *view)
{
view->ref = 1;
view->ranges = NULL;
view->nr = 0;
view->nr_allocated = 0;
}
/* Insert a range into a given position. Caller is responsible for maintaining
* sorting order.
*/
static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range)
{
if (view->nr == view->nr_allocated) {
view->nr_allocated = MAX(2 * view->nr, 10);
view->ranges = g_realloc(view->ranges,
view->nr_allocated * sizeof(*view->ranges));
}
memmove(view->ranges + pos + 1, view->ranges + pos,
(view->nr - pos) * sizeof(FlatRange));
view->ranges[pos] = *range;
memory_region_ref(range->mr);
++view->nr;
}
static void flatview_destroy(FlatView *view)
{
int i;
for (i = 0; i < view->nr; i++) {
memory_region_unref(view->ranges[i].mr);
}
g_free(view->ranges);
g_free(view);
}
static void flatview_ref(FlatView *view)
{
atomic_inc(&view->ref);
}
static void flatview_unref(FlatView *view)
{
if (atomic_fetch_dec(&view->ref) == 1) {
flatview_destroy(view);
}
}
static bool can_merge(FlatRange *r1, FlatRange *r2)
{
return int128_eq(addrrange_end(r1->addr), r2->addr.start)
&& r1->mr == r2->mr
&& int128_eq(int128_add(int128_make64(r1->offset_in_region),
r1->addr.size),
int128_make64(r2->offset_in_region))
&& r1->dirty_log_mask == r2->dirty_log_mask
&& r1->romd_mode == r2->romd_mode
&& r1->readonly == r2->readonly;
}
/* Attempt to simplify a view by merging adjacent ranges */
static void flatview_simplify(FlatView *view)
{
unsigned i, j;
i = 0;
while (i < view->nr) {
j = i + 1;
while (j < view->nr
&& can_merge(&view->ranges[j-1], &view->ranges[j])) {
int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size);
++j;
}
++i;
memmove(&view->ranges[i], &view->ranges[j],
(view->nr - j) * sizeof(view->ranges[j]));
view->nr -= j - i;
}
}
static bool memory_region_big_endian(MemoryRegion *mr)
{
#ifdef TARGET_WORDS_BIGENDIAN
return mr->ops->endianness != DEVICE_LITTLE_ENDIAN;
#else
return mr->ops->endianness == DEVICE_BIG_ENDIAN;
#endif
}
static bool memory_region_wrong_endianness(MemoryRegion *mr)
{
#ifdef TARGET_WORDS_BIGENDIAN
return mr->ops->endianness == DEVICE_LITTLE_ENDIAN;
#else
return mr->ops->endianness == DEVICE_BIG_ENDIAN;
#endif
}
static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
{
if (memory_region_wrong_endianness(mr)) {
switch (size) {
case 1:
break;
case 2:
*data = bswap16(*data);
break;
case 4:
*data = bswap32(*data);
break;
case 8:
*data = bswap64(*data);
break;
default:
abort();
}
}
}
static MemTxResult memory_region_oldmmio_read_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
unsigned shift,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp;
tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr);
// UNICORN: Commented out
//trace_memory_region_ops_read(mr, addr, tmp, size);
*value |= (tmp & mask) << shift;
return MEMTX_OK;
}
static MemTxResult memory_region_read_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
unsigned shift,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp;
// UNICORN: Commented out
//if (mr->flush_coalesced_mmio) {
// qemu_flush_coalesced_mmio_buffer();
//}
tmp = mr->ops->read(mr->uc, mr->opaque, addr, size);
*value |= (tmp & mask) << shift;
return MEMTX_OK;
}
static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
unsigned shift,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp = 0;
MemTxResult r;
// UNICORN: commented out
//if (mr->flush_coalesced_mmio) {
// qemu_flush_coalesced_mmio_buffer();
//}
r = mr->ops->read_with_attrs(mr->uc, mr->opaque, addr, &tmp, size, attrs);
// UNICORN: Commented out
//trace_memory_region_ops_read(mr, addr, tmp, size);
*value |= (tmp & mask) << shift;
return r;
}
static MemTxResult memory_region_oldmmio_write_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
unsigned shift,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp;
tmp = (*value >> shift) & mask;
mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp);
return MEMTX_OK;
}
static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
unsigned shift,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp;
tmp = (*value >> shift) & mask;
mr->ops->write(mr->uc, mr->opaque, addr, tmp, size);
return MEMTX_OK;
}
static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
unsigned shift,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp;
// UNICORN: Commented out
//if (mr->flush_coalesced_mmio) {
// qemu_flush_coalesced_mmio_buffer();
//}
tmp = (*value >> shift) & mask;
// UNICORN: Commented out
//trace_memory_region_ops_write(mr, addr, tmp, size);
return mr->ops->write_with_attrs(mr->uc, mr->opaque, addr, tmp, size, attrs);
}
static MemTxResult access_with_adjusted_size(hwaddr addr,
uint64_t *value,
unsigned size,
unsigned access_size_min,
unsigned access_size_max,
MemTxResult (*access)(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
unsigned shift,
uint64_t mask,
MemTxAttrs attrs),
MemoryRegion *mr,
MemTxAttrs attrs)
{
uint64_t access_mask;
unsigned access_size;
unsigned i;
MemTxResult r = MEMTX_OK;
if (!access_size_min) {
access_size_min = 1;
}
if (!access_size_max) {
access_size_max = 4;
}
/* FIXME: support unaligned access? */
access_size = MAX(MIN(size, access_size_max), access_size_min);
access_mask = (0-1ULL) >> (64 - access_size * 8);
if (memory_region_big_endian(mr)) {
for (i = 0; i < size; i += access_size) {
r |= access(mr, addr + i, value, access_size,
(size - access_size - i) * 8, access_mask, attrs);
}
} else {
for (i = 0; i < size; i += access_size) {
r |= access(mr, addr + i, value, access_size, i * 8,
access_mask, attrs);
}
}
return r;
}
static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
{
AddressSpace *as;
while (mr->container) {
mr = mr->container;
}
QTAILQ_FOREACH(as, &mr->uc->address_spaces, address_spaces_link) {
if (mr == as->root) {
return as;
}
}
return NULL;
}
/* Render a memory region into the global view. Ranges in @view obscure
* ranges in @mr.
*/
static void render_memory_region(FlatView *view,
MemoryRegion *mr,
Int128 base,
AddrRange clip,
bool readonly)
{
MemoryRegion *subregion;
unsigned i;
hwaddr offset_in_region;
Int128 remain;
Int128 now;
FlatRange fr;
AddrRange tmp;
if (!mr->enabled) {
return;
}
int128_addto(&base, int128_make64(mr->addr));
readonly |= mr->readonly;
tmp = addrrange_make(base, mr->size);
if (!addrrange_intersects(tmp, clip)) {
return;
}
clip = addrrange_intersection(tmp, clip);
if (mr->alias) {
int128_subfrom(&base, int128_make64(mr->alias->addr));
int128_subfrom(&base, int128_make64(mr->alias_offset));
render_memory_region(view, mr->alias, base, clip, readonly);
return;
}
/* Render subregions in priority order. */
QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
render_memory_region(view, subregion, base, clip, readonly);
}
if (!mr->terminates) {
return;
}
offset_in_region = int128_get64(int128_sub(clip.start, base));
base = clip.start;
remain = clip.size;
fr.mr = mr;
fr.dirty_log_mask = mr->dirty_log_mask;
fr.romd_mode = mr->romd_mode;
fr.readonly = readonly;
/* Render the region itself into any gaps left by the current view. */
for (i = 0; i < view->nr && int128_nz(remain); ++i) {
if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
continue;
}
if (int128_lt(base, view->ranges[i].addr.start)) {
now = int128_min(remain,
int128_sub(view->ranges[i].addr.start, base));
fr.offset_in_region = offset_in_region;
fr.addr = addrrange_make(base, now);
flatview_insert(view, i, &fr);
++i;
int128_addto(&base, now);
offset_in_region += int128_get64(now);
int128_subfrom(&remain, now);
}
now = int128_sub(int128_min(int128_add(base, remain),
addrrange_end(view->ranges[i].addr)),
base);
int128_addto(&base, now);
offset_in_region += int128_get64(now);
int128_subfrom(&remain, now);
}
if (int128_nz(remain)) {
fr.offset_in_region = offset_in_region;
fr.addr = addrrange_make(base, remain);
flatview_insert(view, i, &fr);
}
}
/* Render a memory topology into a list of disjoint absolute ranges. */
static FlatView *generate_memory_topology(MemoryRegion *mr)
{
FlatView *view;
view = g_new(FlatView, 1);
flatview_init(view);
if (mr) {
render_memory_region(view, mr, int128_zero(),
addrrange_make(int128_zero(), int128_2_64()), false);
}
flatview_simplify(view);
return view;
}
static FlatView *address_space_get_flatview(AddressSpace *as)
{
FlatView *view;
view = as->current_map;
flatview_ref(view);
return view;
}
static void address_space_update_topology_pass(AddressSpace *as,
const FlatView *old_view,
const FlatView *new_view,
bool adding)
{
unsigned iold, inew;
FlatRange *frold, *frnew;
struct uc_struct *uc = as->uc;
/* Generate a symmetric difference of the old and new memory maps.
* Kill ranges in the old map, and instantiate ranges in the new map.
*/
iold = inew = 0;
while (iold < old_view->nr || inew < new_view->nr) {
if (iold < old_view->nr) {
frold = &old_view->ranges[iold];
} else {
frold = NULL;
}
if (inew < new_view->nr) {
frnew = &new_view->ranges[inew];
} else {
frnew = NULL;
}
if (frold
&& (!frnew
|| int128_lt(frold->addr.start, frnew->addr.start)
|| (int128_eq(frold->addr.start, frnew->addr.start)
&& !flatrange_equal(frold, frnew)))) {
/* In old but not in new, or in both but attributes changed. */
if (!adding) {
MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del);
}
++iold;
} else if (frold && frnew && flatrange_equal(frold, frnew)) {
/* In both and unchanged (except logging may have changed) */
if (adding) {
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop);
if (frold->dirty_log_mask && !frnew->dirty_log_mask) {
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop);
} else if (frnew->dirty_log_mask && !frold->dirty_log_mask) {
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start);
}
}
++iold;
++inew;
} else {
/* In new */
if (adding) {
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add);
}
++inew;
}
}
}
static void address_space_update_topology(AddressSpace *as)
{
FlatView *old_view = address_space_get_flatview(as);
FlatView *new_view = generate_memory_topology(as->root);
address_space_update_topology_pass(as, old_view, new_view, false);
address_space_update_topology_pass(as, old_view, new_view, true);
flatview_unref(as->current_map);
as->current_map = new_view;
/* Note that all the old MemoryRegions are still alive up to this
* point. This relieves most MemoryListeners from the need to
* ref/unref the MemoryRegions they get---unless they use them
* outside the iothread mutex, in which case precise reference
* counting is necessary.
*/
flatview_unref(old_view);
}
void memory_region_transaction_begin(struct uc_struct *uc)
{
++uc->memory_region_transaction_depth;
}
static void memory_region_clear_pending(struct uc_struct *uc)
{
uc->memory_region_update_pending = false;
}
void memory_region_transaction_commit(struct uc_struct *uc)
{
AddressSpace *as;
assert(uc->memory_region_transaction_depth);
--uc->memory_region_transaction_depth;
if (!uc->memory_region_transaction_depth) {
if (uc->memory_region_update_pending) {
MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
QTAILQ_FOREACH(as, &uc->address_spaces, address_spaces_link) {
address_space_update_topology(as);
}
MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
}
memory_region_clear_pending(uc);
}
}
static void memory_region_destructor_none(MemoryRegion *mr)
{
}
static void memory_region_destructor_ram(MemoryRegion *mr)
{
qemu_ram_free(mr->uc, mr->ram_addr);
}
static void memory_region_destructor_alias(MemoryRegion *mr)
{
memory_region_unref(mr->alias);
}
static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr)
{
qemu_ram_free_from_ptr(mr->uc, mr->ram_addr);
}
static bool memory_region_need_escape(char c)
{
return c == '/' || c == '[' || c == '\\' || c == ']';
}
static char *memory_region_escape_name(const char *name)
{
const char *p;
char *escaped, *q;
uint8_t c;
size_t bytes = 0;
for (p = name; *p; p++) {
bytes += memory_region_need_escape(*p) ? 4 : 1;
}
if (bytes == p - name) {
return g_memdup(name, bytes + 1);
}
escaped = g_malloc(bytes + 1);
for (p = name, q = escaped; *p; p++) {
c = *p;
if (unlikely(memory_region_need_escape(c))) {
*q++ = '\\';
*q++ = 'x';
*q++ = "0123456789abcdef"[c >> 4];
c = "0123456789abcdef"[c & 15];
}
*q++ = c;
}
*q = 0;
return escaped;
}
void memory_region_init(struct uc_struct *uc, MemoryRegion *mr,
Object *owner,
const char *name,
uint64_t size)
{
if (!owner) {
owner = qdev_get_machine(uc);
uc->owner = owner;
}
object_initialize(uc, mr, sizeof(*mr), TYPE_MEMORY_REGION);
mr->uc = uc;
mr->size = int128_make64(size);
if (size == UINT64_MAX) {
mr->size = int128_2_64();
}
mr->name = g_strdup(name);
if (name) {
char *escaped_name = memory_region_escape_name(name);
char *name_array = g_strdup_printf("%s[*]", escaped_name);
object_property_add_child(owner, name_array, OBJECT(mr), &error_abort);
object_unref(uc, OBJECT(mr));
g_free(name_array);
g_free(escaped_name);
}
}
static void memory_region_get_addr(struct uc_struct *uc, Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
uint64_t value = mr->addr;
visit_type_uint64(v, &value, name, errp);
}
static void memory_region_get_container(struct uc_struct *uc, Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
gchar *path = (gchar *)"";
if (mr->container) {
path = object_get_canonical_path(OBJECT(mr->container));
}
visit_type_str(v, &path, name, errp);
if (mr->container) {
g_free(path);
}
}
static Object *memory_region_resolve_container(struct uc_struct *uc, Object *obj, void *opaque,
const char *part)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
return OBJECT(mr->container);
}
static void memory_region_get_priority(struct uc_struct *uc, Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
int32_t value = mr->priority;
visit_type_int32(v, &value, name, errp);
}
static bool memory_region_get_may_overlap(struct uc_struct *uc, Object *obj, Error **errp)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
return mr->may_overlap;
}
static void memory_region_get_size(struct uc_struct *uc, Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
uint64_t value = memory_region_size(mr);
visit_type_uint64(v, &value, name, errp);
}
static void memory_region_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
ObjectProperty *op;
mr->ops = &unassigned_mem_ops;
mr->enabled = true;
mr->romd_mode = true;
mr->destructor = memory_region_destructor_none;
QTAILQ_INIT(&mr->subregions);
op = object_property_add(OBJECT(mr), "container",
"link<" TYPE_MEMORY_REGION ">",
memory_region_get_container,
NULL, /* memory_region_set_container */
NULL, NULL, &error_abort);
op->resolve = memory_region_resolve_container;
object_property_add(OBJECT(mr), "addr", "uint64",
memory_region_get_addr,
NULL, /* memory_region_set_addr */
NULL, NULL, &error_abort);
object_property_add(OBJECT(mr), "priority", "uint32",
memory_region_get_priority,
NULL, /* memory_region_set_priority */
NULL, NULL, &error_abort);
object_property_add_bool(mr->uc, OBJECT(mr), "may-overlap",
memory_region_get_may_overlap,
NULL, /* memory_region_set_may_overlap */
&error_abort);
object_property_add(OBJECT(mr), "size", "uint64",
memory_region_get_size,
NULL, /* memory_region_set_size, */
NULL, NULL, &error_abort);
}
static uint64_t unassigned_mem_read(struct uc_struct* uc, hwaddr addr, unsigned size)
{
#ifdef DEBUG_UNASSIGNED
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
#endif
if (uc->current_cpu != NULL) {
cpu_unassigned_access(uc->current_cpu, addr, false, false, 0, size);
}
return 0;
}
static void unassigned_mem_write(struct uc_struct* uc, hwaddr addr,
uint64_t val, unsigned size)
{
#ifdef DEBUG_UNASSIGNED
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val);
#endif
if (uc->current_cpu != NULL) {
cpu_unassigned_access(uc->current_cpu, addr, true, false, 0, size);
}
}
static bool unassigned_mem_accepts(void *opaque, hwaddr addr,
unsigned size, bool is_write)
{
return false;
}
const MemoryRegionOps unassigned_mem_ops = {
NULL,
NULL,
NULL,
NULL,
DEVICE_NATIVE_ENDIAN,
{0,0,false,unassigned_mem_accepts},
};
bool memory_region_access_valid(MemoryRegion *mr,
hwaddr addr,
unsigned size,
bool is_write)
{
int access_size_min, access_size_max;
int access_size, i;
if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
return false;
}
if (!mr->ops->valid.accepts) {
return true;
}
access_size_min = mr->ops->valid.min_access_size;
if (!mr->ops->valid.min_access_size) {
access_size_min = 1;
}
access_size_max = mr->ops->valid.max_access_size;
if (!mr->ops->valid.max_access_size) {
access_size_max = 4;
}
access_size = MAX(MIN(size, access_size_max), access_size_min);
for (i = 0; i < size; i += access_size) {
if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size,
is_write)) {
return false;
}
}
return true;
}
static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr,
hwaddr addr,
uint64_t *pval,
unsigned size,
MemTxAttrs attrs)
{
*pval = 0;
if (mr->ops->read) {
return access_with_adjusted_size(addr, pval, size,
mr->ops->impl.min_access_size,
mr->ops->impl.max_access_size,
memory_region_read_accessor,
mr, attrs);
} else if (mr->ops->read_with_attrs) {
return access_with_adjusted_size(addr, pval, size,
mr->ops->impl.min_access_size,
mr->ops->impl.max_access_size,
memory_region_read_with_attrs_accessor,
mr, attrs);
} else {
return access_with_adjusted_size(addr, pval, size, 1, 4,
memory_region_oldmmio_read_accessor,
mr, attrs);
}
}
MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
hwaddr addr,
uint64_t *pval,
unsigned size,
MemTxAttrs attrs)
{
MemTxResult r;
if (!memory_region_access_valid(mr, addr, size, false)) {
*pval = unassigned_mem_read(mr->uc, addr, size);
return MEMTX_DECODE_ERROR;
}
r = memory_region_dispatch_read1(mr, addr, pval, size, attrs);
adjust_endianness(mr, pval, size);
return r;
}
MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
hwaddr addr,
uint64_t data,
unsigned size,
MemTxAttrs attrs)
{
if (!memory_region_access_valid(mr, addr, size, true)) {
unassigned_mem_write(mr->uc, addr, data, size);
return MEMTX_DECODE_ERROR;
}
adjust_endianness(mr, &data, size);
if (mr->ops->write) {
return access_with_adjusted_size(addr, &data, size,
mr->ops->impl.min_access_size,
mr->ops->impl.max_access_size,
memory_region_write_accessor, mr,
attrs);
} else if (mr->ops->write_with_attrs) {
return
access_with_adjusted_size(addr, &data, size,
mr->ops->impl.min_access_size,
mr->ops->impl.max_access_size,
memory_region_write_with_attrs_accessor,
mr, attrs);
} else {
return access_with_adjusted_size(addr, &data, size, 1, 4,
memory_region_oldmmio_write_accessor,
mr, attrs);
}
}
void memory_region_init_io(struct uc_struct *uc, MemoryRegion *mr,
Object *owner,
const MemoryRegionOps *ops,
void *opaque,
const char *name,
uint64_t size)
{
memory_region_init(uc, mr, owner, name, size);
mr->ops = ops;
mr->opaque = opaque;
mr->terminates = true;
mr->ram_addr = ~(ram_addr_t)0;
}
void memory_region_init_ram(struct uc_struct *uc, MemoryRegion *mr,
Object *owner,
const char *name,
uint64_t size,
uint32_t perms,
Error **errp)
{
memory_region_init(uc, mr, owner, name, size);
mr->ram = true;
if (!(perms & UC_PROT_WRITE)) {
mr->readonly = true;
}
mr->perms = perms;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
mr->ram_addr = qemu_ram_alloc(size, mr, errp);
}
void memory_region_init_ram_ptr(struct uc_struct *uc, MemoryRegion *mr,
Object *owner,
const char *name,
uint64_t size,
void *ptr)
{
memory_region_init(uc, mr, owner, name, size);
mr->ram = true;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram_from_ptr;
/* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
assert(ptr != NULL);
mr->ram_addr = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_abort);
}
void memory_region_set_skip_dump(MemoryRegion *mr)
{
mr->skip_dump = true;
}
void memory_region_init_alias(struct uc_struct *uc, MemoryRegion *mr,
Object *owner,
const char *name,
MemoryRegion *orig,
hwaddr offset,
uint64_t size)
{
memory_region_init(uc, mr, owner, name, size);
memory_region_ref(orig);
mr->destructor = memory_region_destructor_alias;
mr->alias = orig;
mr->alias_offset = offset;
}
void memory_region_init_reservation(struct uc_struct *uc, MemoryRegion *mr,
Object *owner,
const char *name,
uint64_t size)
{
memory_region_init_io(uc, mr, owner, &unassigned_mem_ops, mr, name, size);
}
static void memory_region_finalize(struct uc_struct *uc, Object *obj, void *opaque)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
assert(QTAILQ_EMPTY(&mr->subregions));
// assert(memory_region_transaction_depth == 0);
mr->destructor(mr);
g_free((char *)mr->name);
}
void memory_region_ref(MemoryRegion *mr)
{
/* MMIO callbacks most likely will access data that belongs
* to the owner, hence the need to ref/unref the owner whenever
* the memory region is in use.
*
* The memory region is a child of its owner. As long as the
* owner doesn't call unparent itself on the memory region,
* ref-ing the owner will also keep the memory region alive.
* Memory regions without an owner are supposed to never go away,
* but we still ref/unref them for debugging purposes.
*/
Object *obj = OBJECT(mr);
if (obj && obj->parent) {
object_ref(obj->parent);
} else {
object_ref(obj);
}
}
void memory_region_unref(MemoryRegion *mr)
{
Object *obj = OBJECT(mr);
if (obj && obj->parent) {
object_unref(mr->uc, obj->parent);
} else {
object_unref(mr->uc, obj);
}
}
uint64_t memory_region_size(MemoryRegion *mr)
{
if (int128_eq(mr->size, int128_2_64())) {
return UINT64_MAX;
}
return int128_get64(mr->size);
}
const char *memory_region_name(const MemoryRegion *mr)
{
if (!mr->name) {
((MemoryRegion *)mr)->name =
object_get_canonical_path_component(OBJECT(mr));
}
return mr->name;
}
bool memory_region_is_ram(MemoryRegion *mr)
{
return mr->ram;
}
bool memory_region_is_skip_dump(MemoryRegion *mr)
{
return mr->skip_dump;
}
bool memory_region_is_logging(MemoryRegion *mr)
{
return mr->dirty_log_mask;
}
bool memory_region_is_rom(MemoryRegion *mr)
{
return mr->ram && mr->readonly;
}
bool memory_region_is_iommu(MemoryRegion *mr)
{
return mr->iommu_ops != 0;
}
void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
{
if (mr->readonly != readonly) {
memory_region_transaction_begin(mr->uc);
mr->readonly = readonly;
if (readonly) {
mr->perms &= ~UC_PROT_WRITE;
}
else {
mr->perms |= UC_PROT_WRITE;
}
mr->uc->memory_region_update_pending |= mr->enabled;
memory_region_transaction_commit(mr->uc);
}
}
void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode)
{
if (mr->romd_mode != romd_mode) {
memory_region_transaction_begin(mr->uc);
mr->romd_mode = romd_mode;
mr->uc->memory_region_update_pending |= mr->enabled;
memory_region_transaction_commit(mr->uc);
}
}
int memory_region_get_fd(MemoryRegion *mr)
{
if (mr->alias) {
return memory_region_get_fd(mr->alias);
}
assert(mr->terminates);
return qemu_get_ram_fd(mr->uc, mr->ram_addr & TARGET_PAGE_MASK);
}
void *memory_region_get_ram_ptr(MemoryRegion *mr)
{
if (mr->alias) {
return (char*)memory_region_get_ram_ptr(mr->alias) + mr->alias_offset;
}
assert(mr->terminates);
return qemu_get_ram_ptr(mr->uc, mr->ram_addr & TARGET_PAGE_MASK);
}
static void memory_region_update_container_subregions(MemoryRegion *subregion)
{
hwaddr offset = subregion->addr;
MemoryRegion *mr = subregion->container;
MemoryRegion *other;
memory_region_transaction_begin(mr->uc);
memory_region_ref(subregion);
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
if (subregion->may_overlap || other->may_overlap) {
continue;
}
if (int128_ge(int128_make64(offset),
int128_add(int128_make64(other->addr), other->size))
|| int128_le(int128_add(int128_make64(offset), subregion->size),
int128_make64(other->addr))) {
continue;
}
#if 0
printf("warning: subregion collision %llx/%llx (%s) "
"vs %llx/%llx (%s)\n",
(unsigned long long)offset,
(unsigned long long)int128_get64(subregion->size),
subregion->name,
(unsigned long long)other->addr,
(unsigned long long)int128_get64(other->size),
other->name);
#endif
}
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
if (subregion->priority >= other->priority) {
QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
goto done;
}
}
QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
done:
mr->uc->memory_region_update_pending |= mr->enabled && subregion->enabled;
memory_region_transaction_commit(mr->uc);
}
static void memory_region_add_subregion_common(MemoryRegion *mr,
hwaddr offset,
MemoryRegion *subregion)
{
assert(!subregion->container);
subregion->container = mr;
subregion->addr = offset;
subregion->end = offset + int128_get64(subregion->size);
memory_region_update_container_subregions(subregion);
}
void memory_region_add_subregion(MemoryRegion *mr,
hwaddr offset,
MemoryRegion *subregion)
{
subregion->may_overlap = false;
subregion->priority = 0;
memory_region_add_subregion_common(mr, offset, subregion);
}
void memory_region_add_subregion_overlap(MemoryRegion *mr,
hwaddr offset,
MemoryRegion *subregion,
int priority)
{
subregion->may_overlap = true;
subregion->priority = priority;
memory_region_add_subregion_common(mr, offset, subregion);
}
void memory_region_del_subregion(MemoryRegion *mr,
MemoryRegion *subregion)
{
memory_region_transaction_begin(mr->uc);
assert(subregion->container == mr);
subregion->container = NULL;
QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
memory_region_unref(subregion);
mr->uc->memory_region_update_pending |= mr->enabled && subregion->enabled;
memory_region_transaction_commit(mr->uc);
}
void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
{
if (enabled == mr->enabled) {
return;
}
memory_region_transaction_begin(mr->uc);
mr->enabled = enabled;
mr->uc->memory_region_update_pending = true;
memory_region_transaction_commit(mr->uc);
}
static void memory_region_readd_subregion(MemoryRegion *mr)
{
MemoryRegion *container = mr->container;
if (container) {
memory_region_transaction_begin(mr->uc);
memory_region_ref(mr);
memory_region_del_subregion(container, mr);
mr->container = container;
memory_region_update_container_subregions(mr);
memory_region_unref(mr);
memory_region_transaction_commit(mr->uc);
}
}
void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
{
if (addr != mr->addr) {
mr->addr = addr;
memory_region_readd_subregion(mr);
}
}
void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
{
assert(mr->alias);
if (offset == mr->alias_offset) {
return;
}
memory_region_transaction_begin(mr->uc);
mr->alias_offset = offset;
mr->uc->memory_region_update_pending |= mr->enabled;
memory_region_transaction_commit(mr->uc);
}
ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr)
{
return mr->ram_addr;
}
uint64_t memory_region_get_alignment(const MemoryRegion *mr)
{
return mr->align;
}
static int cmp_flatrange_addr(const void *addr_, const void *fr_)
{
const AddrRange *addr = addr_;
const FlatRange *fr = fr_;
if (int128_le(addrrange_end(*addr), fr->addr.start)) {
return -1;
} else if (int128_ge(addr->start, addrrange_end(fr->addr))) {
return 1;
}
return 0;
}
static FlatRange *flatview_lookup(FlatView *view, AddrRange addr)
{
return bsearch(&addr, view->ranges, view->nr,
sizeof(FlatRange), cmp_flatrange_addr);
}
bool memory_region_present(MemoryRegion *container, hwaddr addr)
{
MemoryRegion *mr = memory_region_find(container, addr, 1).mr;
if (!mr || (mr == container)) {
return false;
}
memory_region_unref(mr);
return true;
}
bool memory_region_is_mapped(MemoryRegion *mr)
{
return mr->container ? true : false;
}
MemoryRegionSection memory_region_find(MemoryRegion *mr,
hwaddr addr, uint64_t size)
{
MemoryRegionSection ret = { NULL };
MemoryRegion *root;
AddressSpace *as;
AddrRange range;
FlatView *view;
FlatRange *fr;
addr += mr->addr;
for (root = mr; root->container; ) {
root = root->container;
addr += root->addr;
}
as = memory_region_to_address_space(root);
if (!as) {
return ret;
}
range = addrrange_make(int128_make64(addr), int128_make64(size));
view = address_space_get_flatview(as);
fr = flatview_lookup(view, range);
if (!fr) {
flatview_unref(view);
return ret;
}
while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
--fr;
}
ret.mr = fr->mr;
ret.address_space = as;
range = addrrange_intersection(range, fr->addr);
ret.offset_within_region = fr->offset_in_region;
ret.offset_within_region += int128_get64(int128_sub(range.start,
fr->addr.start));
ret.size = range.size;
ret.offset_within_address_space = int128_get64(range.start);
ret.readonly = fr->readonly;
memory_region_ref(ret.mr);
flatview_unref(view);
return ret;
}
static void listener_add_address_space(MemoryListener *listener,
AddressSpace *as)
{
FlatView *view;
FlatRange *fr;
if (listener->address_space_filter
&& listener->address_space_filter != as) {
return;
}
if (listener->address_space_filter->uc->global_dirty_log) {
if (listener->log_global_start) {
listener->log_global_start(listener);
}
}
view = address_space_get_flatview(as);
FOR_EACH_FLAT_RANGE(fr, view) {
MemoryRegionSection section = MemoryRegionSection_make(
fr->mr,
as,
fr->offset_in_region,
fr->addr.size,
int128_get64(fr->addr.start),
fr->readonly);
if (listener->region_add) {
listener->region_add(listener, &section);
}
}
flatview_unref(view);
}
void memory_listener_register(struct uc_struct* uc, MemoryListener *listener, AddressSpace *filter)
{
MemoryListener *other = NULL;
AddressSpace *as;
listener->address_space_filter = filter;
if (QTAILQ_EMPTY(&uc->memory_listeners)
|| listener->priority >= QTAILQ_LAST(&uc->memory_listeners,
memory_listeners)->priority) {
QTAILQ_INSERT_TAIL(&uc->memory_listeners, listener, link);
} else {
QTAILQ_FOREACH(other, &uc->memory_listeners, link) {
if (listener->priority < other->priority) {
break;
}
}
QTAILQ_INSERT_BEFORE(other, listener, link);
}
QTAILQ_FOREACH(as, &uc->address_spaces, address_spaces_link) {
listener_add_address_space(listener, as);
}
}
void memory_listener_unregister(struct uc_struct *uc, MemoryListener *listener)
{
QTAILQ_REMOVE(&uc->memory_listeners, listener, link);
}
void address_space_init(struct uc_struct *uc, AddressSpace *as, MemoryRegion *root, const char *name)
{
if (QTAILQ_EMPTY(&uc->address_spaces)) {
memory_init(uc);
}
memory_region_transaction_begin(uc);
as->uc = uc;
as->root = root;
as->current_map = g_new(FlatView, 1);
flatview_init(as->current_map);
QTAILQ_INSERT_TAIL(&uc->address_spaces, as, address_spaces_link);
as->name = g_strdup(name ? name : "anonymous");
address_space_init_dispatch(as);
uc->memory_region_update_pending |= root->enabled;
memory_region_transaction_commit(uc);
}
void address_space_destroy(AddressSpace *as)
{
MemoryListener *listener;
/* Flush out anything from MemoryListeners listening in on this */
memory_region_transaction_begin(as->uc);
as->root = NULL;
memory_region_transaction_commit(as->uc);
QTAILQ_REMOVE(&as->uc->address_spaces, as, address_spaces_link);
address_space_unregister(as);
address_space_destroy_dispatch(as);
// TODO(danghvu): why assert fail here?
QTAILQ_FOREACH(listener, &as->uc->memory_listeners, link) {
// assert(listener->address_space_filter != as);
}
flatview_unref(as->current_map);
g_free(as->name);
}
typedef struct MemoryRegionList MemoryRegionList;
struct MemoryRegionList {
const MemoryRegion *mr;
QTAILQ_ENTRY(MemoryRegionList) queue;
};
typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead;
static const TypeInfo memory_region_info = {
TYPE_MEMORY_REGION,
TYPE_OBJECT,
0,
sizeof(MemoryRegion),
NULL,
memory_region_initfn,
NULL,
memory_region_finalize,
};
void memory_register_types(struct uc_struct *uc)
{
type_register_static(uc, &memory_region_info);
}
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