typedef struct AddrRange AddrRange;
+/*
+ * Note using signed integers limits us to physical addresses at most
+ * 63 bits wide. They are needed for negative offsetting in aliases
+ * (large MemoryRegion::alias_offset).
+ */
struct AddrRange {
- uint64_t start;
- uint64_t size;
+ int64_t start;
+ int64_t size;
};
-static AddrRange addrrange_make(uint64_t start, uint64_t size)
+static AddrRange addrrange_make(int64_t start, int64_t size)
{
return (AddrRange) { start, size };
}
return r1.start == r2.start && r1.size == r2.size;
}
-static uint64_t addrrange_end(AddrRange r)
+static int64_t addrrange_end(AddrRange r)
{
return r.start + r.size;
}
static bool addrrange_intersects(AddrRange r1, AddrRange r2)
{
- return (r1.start >= r2.start && r1.start < r2.start + r2.size)
- || (r2.start >= r1.start && r2.start < r1.start + r1.size);
+ return (r1.start >= r2.start && (r1.start - r2.start) < r2.size)
+ || (r2.start >= r1.start && (r2.start - r1.start) < r1.size);
}
static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
{
- uint64_t start = MAX(r1.start, r2.start);
+ int64_t start = MAX(r1.start, r2.start);
/* off-by-one arithmetic to prevent overflow */
- uint64_t end = MIN(addrrange_end(r1) - 1, addrrange_end(r2) - 1);
+ int64_t end = MIN(addrrange_end(r1) - 1, addrrange_end(r2) - 1);
return addrrange_make(start, end - start + 1);
}
target_phys_addr_t offset_in_region;
AddrRange addr;
uint8_t dirty_log_mask;
+ bool readable;
};
/* Flattened global view of current active memory hierarchy. Kept in sorted
{
return a->mr == b->mr
&& addrrange_equal(a->addr, b->addr)
- && a->offset_in_region == b->offset_in_region;
+ && a->offset_in_region == b->offset_in_region
+ && a->readable == b->readable;
}
static void flatview_init(FlatView *view)
{
if (view->nr == view->nr_allocated) {
view->nr_allocated = MAX(2 * view->nr, 10);
- view->ranges = qemu_realloc(view->ranges,
+ view->ranges = g_realloc(view->ranges,
view->nr_allocated * sizeof(*view->ranges));
}
memmove(view->ranges + pos + 1, view->ranges + pos,
static void flatview_destroy(FlatView *view)
{
- qemu_free(view->ranges);
+ g_free(view->ranges);
}
static bool can_merge(FlatRange *r1, FlatRange *r2)
return addrrange_end(r1->addr) == r2->addr.start
&& r1->mr == r2->mr
&& r1->offset_in_region + r1->addr.size == r2->offset_in_region
- && r1->dirty_log_mask == r2->dirty_log_mask;
+ && r1->dirty_log_mask == r2->dirty_log_mask
+ && r1->readable == r2->readable;
}
/* Attempt to simplify a view by merging ajacent ranges */
}
}
+static void memory_region_read_accessor(void *opaque,
+ target_phys_addr_t addr,
+ uint64_t *value,
+ unsigned size,
+ unsigned shift,
+ uint64_t mask)
+{
+ MemoryRegion *mr = opaque;
+ uint64_t tmp;
+
+ tmp = mr->ops->read(mr->opaque, addr, size);
+ *value |= (tmp & mask) << shift;
+}
+
+static void memory_region_write_accessor(void *opaque,
+ target_phys_addr_t addr,
+ uint64_t *value,
+ unsigned size,
+ unsigned shift,
+ uint64_t mask)
+{
+ MemoryRegion *mr = opaque;
+ uint64_t tmp;
+
+ tmp = (*value >> shift) & mask;
+ mr->ops->write(mr->opaque, addr, tmp, size);
+}
+
+static void access_with_adjusted_size(target_phys_addr_t addr,
+ uint64_t *value,
+ unsigned size,
+ unsigned access_size_min,
+ unsigned access_size_max,
+ void (*access)(void *opaque,
+ target_phys_addr_t addr,
+ uint64_t *value,
+ unsigned size,
+ unsigned shift,
+ uint64_t mask),
+ void *opaque)
+{
+ uint64_t access_mask;
+ unsigned access_size;
+ unsigned i;
+
+ if (!access_size_min) {
+ access_size_min = 1;
+ }
+ if (!access_size_max) {
+ access_size_max = 4;
+ }
+ access_size = MAX(MIN(size, access_size_max), access_size_min);
+ access_mask = -1ULL >> (64 - access_size * 8);
+ for (i = 0; i < size; i += access_size) {
+ /* FIXME: big-endian support */
+ access(opaque, addr + i, value, access_size, i * 8, access_mask);
+ }
+}
+
static void memory_region_prepare_ram_addr(MemoryRegion *mr);
static void as_memory_range_add(AddressSpace *as, FlatRange *fr)
region_offset = 0;
}
+ if (!fr->readable) {
+ phys_offset &= ~TARGET_PAGE_MASK & ~IO_MEM_ROMD;
+ }
+
cpu_register_physical_memory_log(fr->addr.start,
fr->addr.size,
phys_offset,
*data = ((uint64_t)1 << (width * 8)) - 1;
if (mrp) {
- *data = mrp->read(mr->opaque, offset - mrp->offset);
+ *data = mrp->read(mr->opaque, offset);
}
return;
}
- *data = mr->ops->read(mr->opaque, offset, width);
+ *data = 0;
+ access_with_adjusted_size(offset, data, width,
+ mr->ops->impl.min_access_size,
+ mr->ops->impl.max_access_size,
+ memory_region_read_accessor, mr);
}
static void memory_region_iorange_write(IORange *iorange,
const MemoryRegionPortio *mrp = find_portio(mr, offset, width, true);
if (mrp) {
- mrp->write(mr->opaque, offset - mrp->offset, data);
+ mrp->write(mr->opaque, offset, data);
}
return;
}
- mr->ops->write(mr->opaque, offset, data, width);
+ access_with_adjusted_size(offset, &data, width,
+ mr->ops->impl.min_access_size,
+ mr->ops->impl.max_access_size,
+ memory_region_write_accessor, mr);
}
static const IORangeOps memory_region_iorange_ops = {
MemoryRegion *subregion;
unsigned i;
target_phys_addr_t offset_in_region;
- uint64_t remain;
- uint64_t now;
+ int64_t remain;
+ int64_t now;
FlatRange fr;
AddrRange tmp;
fr.offset_in_region = offset_in_region;
fr.addr = addrrange_make(base, now);
fr.dirty_log_mask = mr->dirty_log_mask;
+ fr.readable = mr->readable;
flatview_insert(view, i, &fr);
++i;
base += now;
fr.offset_in_region = offset_in_region;
fr.addr = addrrange_make(base, remain);
fr.dirty_log_mask = mr->dirty_log_mask;
+ fr.readable = mr->readable;
flatview_insert(view, i, &fr);
}
}
flatview_init(&view);
- render_memory_region(&view, mr, 0, addrrange_make(0, UINT64_MAX));
+ render_memory_region(&view, mr, 0, addrrange_make(0, INT64_MAX));
flatview_simplify(&view);
return view;
fr->addr.start - fr->offset_in_region);
if (addrrange_intersects(fr->addr, tmp)) {
++ioeventfd_nb;
- ioeventfds = qemu_realloc(ioeventfds,
+ ioeventfds = g_realloc(ioeventfds,
ioeventfd_nb * sizeof(*ioeventfds));
ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
ioeventfds[ioeventfd_nb-1].addr = tmp;
address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb,
as->ioeventfds, as->ioeventfd_nb);
- qemu_free(as->ioeventfds);
+ g_free(as->ioeventfds);
as->ioeventfds = ioeventfds;
as->ioeventfd_nb = ioeventfd_nb;
}
memory_region_update_topology();
}
+static void memory_region_destructor_none(MemoryRegion *mr)
+{
+}
+
+static void memory_region_destructor_ram(MemoryRegion *mr)
+{
+ qemu_ram_free(mr->ram_addr);
+}
+
+static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr)
+{
+ qemu_ram_free_from_ptr(mr->ram_addr);
+}
+
+static void memory_region_destructor_iomem(MemoryRegion *mr)
+{
+ cpu_unregister_io_memory(mr->ram_addr);
+}
+
+static void memory_region_destructor_rom_device(MemoryRegion *mr)
+{
+ qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK);
+ cpu_unregister_io_memory(mr->ram_addr & ~(TARGET_PAGE_MASK | IO_MEM_ROMD));
+}
+
void memory_region_init(MemoryRegion *mr,
const char *name,
uint64_t size)
mr->addr = 0;
mr->offset = 0;
mr->terminates = false;
+ mr->readable = true;
+ mr->destructor = memory_region_destructor_none;
mr->priority = 0;
mr->may_overlap = false;
mr->alias = NULL;
QTAILQ_INIT(&mr->subregions);
memset(&mr->subregions_link, 0, sizeof mr->subregions_link);
QTAILQ_INIT(&mr->coalesced);
- mr->name = qemu_strdup(name);
+ mr->name = g_strdup(name);
mr->dirty_log_mask = 0;
mr->ioeventfd_nb = 0;
mr->ioeventfds = NULL;
unsigned size)
{
MemoryRegion *mr = _mr;
- unsigned access_size, access_size_min, access_size_max;
- uint64_t access_mask;
- uint32_t data = 0, tmp;
- unsigned i;
+ uint64_t data = 0;
if (!memory_region_access_valid(mr, addr, size)) {
return -1U; /* FIXME: better signalling */
}
/* FIXME: support unaligned access */
-
- access_size_min = mr->ops->impl.min_access_size;
- if (!access_size_min) {
- access_size_min = 1;
- }
- access_size_max = mr->ops->impl.max_access_size;
- if (!access_size_max) {
- access_size_max = 4;
- }
- access_size = MAX(MIN(size, access_size_max), access_size_min);
- access_mask = -1ULL >> (64 - access_size * 8);
- addr += mr->offset;
- for (i = 0; i < size; i += access_size) {
- /* FIXME: big-endian support */
- tmp = mr->ops->read(mr->opaque, addr + i, access_size);
- data |= (tmp & access_mask) << (i * 8);
- }
+ access_with_adjusted_size(addr + mr->offset, &data, size,
+ mr->ops->impl.min_access_size,
+ mr->ops->impl.max_access_size,
+ memory_region_read_accessor, mr);
return data;
}
uint64_t data)
{
MemoryRegion *mr = _mr;
- unsigned access_size, access_size_min, access_size_max;
- uint64_t access_mask;
- unsigned i;
if (!memory_region_access_valid(mr, addr, size)) {
return; /* FIXME: better signalling */
}
/* FIXME: support unaligned access */
-
- access_size_min = mr->ops->impl.min_access_size;
- if (!access_size_min) {
- access_size_min = 1;
- }
- access_size_max = mr->ops->impl.max_access_size;
- if (!access_size_max) {
- access_size_max = 4;
- }
- access_size = MAX(MIN(size, access_size_max), access_size_min);
- access_mask = -1ULL >> (64 - access_size * 8);
- addr += mr->offset;
- for (i = 0; i < size; i += access_size) {
- /* FIXME: big-endian support */
- mr->ops->write(mr->opaque, addr + i, (data >> (i * 8)) & access_mask,
- access_size);
- }
+ access_with_adjusted_size(addr + mr->offset, &data, size,
+ mr->ops->impl.min_access_size,
+ mr->ops->impl.max_access_size,
+ memory_region_write_accessor, mr);
}
static uint32_t memory_region_read_thunk_b(void *mr, target_phys_addr_t addr)
return;
}
+ mr->destructor = memory_region_destructor_iomem;
mr->ram_addr = cpu_register_io_memory(memory_region_read_thunk,
memory_region_write_thunk,
mr,
{
memory_region_init(mr, name, size);
mr->terminates = true;
+ mr->destructor = memory_region_destructor_ram;
mr->ram_addr = qemu_ram_alloc(dev, name, size);
mr->backend_registered = true;
}
{
memory_region_init(mr, name, size);
mr->terminates = true;
+ mr->destructor = memory_region_destructor_ram_from_ptr;
mr->ram_addr = qemu_ram_alloc_from_ptr(dev, name, size, ptr);
mr->backend_registered = true;
}
mr->alias_offset = offset;
}
+void memory_region_init_rom_device(MemoryRegion *mr,
+ const MemoryRegionOps *ops,
+ void *opaque,
+ DeviceState *dev,
+ const char *name,
+ uint64_t size)
+{
+ memory_region_init(mr, name, size);
+ mr->ops = ops;
+ mr->opaque = opaque;
+ mr->terminates = true;
+ mr->destructor = memory_region_destructor_rom_device;
+ mr->ram_addr = qemu_ram_alloc(dev, name, size);
+ mr->ram_addr |= cpu_register_io_memory(memory_region_read_thunk,
+ memory_region_write_thunk,
+ mr,
+ mr->ops->endianness);
+ mr->ram_addr |= IO_MEM_ROMD;
+ mr->backend_registered = true;
+}
+
void memory_region_destroy(MemoryRegion *mr)
{
assert(QTAILQ_EMPTY(&mr->subregions));
+ mr->destructor(mr);
memory_region_clear_coalescing(mr);
- qemu_free((char *)mr->name);
- qemu_free(mr->ioeventfds);
+ g_free((char *)mr->name);
+ g_free(mr->ioeventfds);
}
uint64_t memory_region_size(MemoryRegion *mr)
/* FIXME */
}
+void memory_region_rom_device_set_readable(MemoryRegion *mr, bool readable)
+{
+ if (mr->readable != readable) {
+ mr->readable = readable;
+ memory_region_update_topology();
+ }
+}
+
void memory_region_reset_dirty(MemoryRegion *mr, target_phys_addr_t addr,
target_phys_addr_t size, unsigned client)
{
assert(mr->terminates);
- return qemu_get_ram_ptr(mr->ram_addr);
+ return qemu_get_ram_ptr(mr->ram_addr & TARGET_PAGE_MASK);
}
static void memory_region_update_coalesced_range(MemoryRegion *mr)
target_phys_addr_t offset,
uint64_t size)
{
- CoalescedMemoryRange *cmr = qemu_malloc(sizeof(*cmr));
+ CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
cmr->addr = addrrange_make(offset, size);
QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link);
while (!QTAILQ_EMPTY(&mr->coalesced)) {
cmr = QTAILQ_FIRST(&mr->coalesced);
QTAILQ_REMOVE(&mr->coalesced, cmr, link);
- qemu_free(cmr);
+ g_free(cmr);
}
memory_region_update_coalesced_range(mr);
}
}
}
++mr->ioeventfd_nb;
- mr->ioeventfds = qemu_realloc(mr->ioeventfds,
+ mr->ioeventfds = g_realloc(mr->ioeventfds,
sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1)));
--mr->ioeventfd_nb;
- mr->ioeventfds = qemu_realloc(mr->ioeventfds,
+ mr->ioeventfds = g_realloc(mr->ioeventfds,
sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1);
memory_region_update_topology();
}
if (subregion->may_overlap || other->may_overlap) {
continue;
}
- if (offset >= other->offset + other->size
- || offset + subregion->size <= other->offset) {
+ if (offset >= other->addr + other->size
+ || offset + subregion->size <= other->addr) {
continue;
}
- printf("warning: subregion collision %llx/%llx vs %llx/%llx\n",
+#if 0
+ printf("warning: subregion collision %llx/%llx (%s) "
+ "vs %llx/%llx (%s)\n",
(unsigned long long)offset,
(unsigned long long)subregion->size,
- (unsigned long long)other->offset,
- (unsigned long long)other->size);
+ subregion->name,
+ (unsigned long long)other->addr,
+ (unsigned long long)other->size,
+ other->name);
+#endif
}
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
if (subregion->priority >= other->priority) {
projects / qemu.git / blobdiff