@@ -1176,6 +1176,11 @@ static RAMBlock *find_ram_block(ram_addr_t addr)
return NULL;
}
+const char *qemu_ram_get_idstr(RAMBlock *rb)
+{
+ return rb->idstr;
+}
+
void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev)
{
RAMBlock *new_block = find_ram_block(addr);
@@ -1515,16 +1520,35 @@ static void *qemu_ram_ptr_length(ram_addr_t addr, hwaddr *size)
}
}
-/* Some of the softmmu routines need to translate from a host pointer
- (typically a TLB entry) back to a ram offset. */
-MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr)
+/*
+ * Translates a host ptr back to a RAMBlock, a ram_addr and an offset
+ * in that RAMBlock.
+ *
+ * ptr: Host pointer to look up
+ * round_offset: If true round the result offset down to a page boundary
+ * *ram_addr: set to result ram_addr
+ * *offset: set to result offset within the RAMBlock
+ * *bm_index: bitmap index (i.e. scaled ram_addr for use where the scale
+ * isn't available)
+ *
+ * Returns: RAMBlock (or NULL if not found)
+ */
+RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset,
+ ram_addr_t *ram_addr,
+ ram_addr_t *offset,
+ unsigned long *bm_index)
{
RAMBlock *block;
uint8_t *host = ptr;
if (xen_enabled()) {
*ram_addr = xen_ram_addr_from_mapcache(ptr);
- return qemu_get_ram_block(*ram_addr)->mr;
+ block = qemu_get_ram_block(*ram_addr);
+ if (!block) {
+ return NULL;
+ }
+ *offset = (host - block->host);
+ return block;
}
block = ram_list.mru_block;
@@ -1545,7 +1569,29 @@ MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr)
return NULL;
found:
- *ram_addr = block->offset + (host - block->host);
+ *offset = (host - block->host);
+ if (round_offset) {
+ *offset &= TARGET_PAGE_MASK;
+ }
+ *ram_addr = block->offset + *offset;
+ *bm_index = *ram_addr >> TARGET_PAGE_BITS;
+ return block;
+}
+
+/* Some of the softmmu routines need to translate from a host pointer
+ (typically a TLB entry) back to a ram offset. */
+MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr)
+{
+ RAMBlock *block;
+ ram_addr_t offset; /* Not used */
+ unsigned long index; /* Not used */
+
+ block = qemu_ram_block_from_host(ptr, false, ram_addr, &offset, &index);
+
+ if (!block) {
+ return NULL;
+ }
+
return block->mr;
}
@@ -55,8 +55,12 @@ typedef uint32_t CPUReadMemoryFunc(void *opaque, hwaddr addr);
void qemu_ram_remap(ram_addr_t addr, ram_addr_t length);
/* This should not be used by devices. */
MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr);
+RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset,
+ ram_addr_t *ram_addr, ram_addr_t *offset,
+ unsigned long *bm_index);
void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev);
void qemu_ram_unset_idstr(ram_addr_t addr);
+const char *qemu_ram_get_idstr(RAMBlock *rb);
void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
int len, int is_write);