memory: add memory_region_is_rom()

Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/memory.c b/memory.c
index 4264b422226c47d42b14c4ed48d9e9e98d85c29d..01baeacf3c24398199baf13988e1fd1a188ee06d 100644 (file)
--- a/memory.c
+++ b/memory.c
@@ -1074,6 +1074,11 @@ bool memory_region_is_ram(MemoryRegion *mr)
     return mr->ram;
 }
 
+bool memory_region_is_rom(MemoryRegion *mr)
+{
+    return mr->ram && mr->readonly;
+}
+
 void memory_region_set_offset(MemoryRegion *mr, target_phys_addr_t offset)
 {
     mr->offset = offset;

diff --git a/memory.h b/memory.h
index dccc9007dfd4816cc86e1c658b11fe05a376ed02..91d6e8aef5b9f9f95c1bb1991f7a5bfb8337c130 100644 (file)
--- a/memory.h
+++ b/memory.h
@@ -276,6 +276,15 @@ uint64_t memory_region_size(MemoryRegion *mr);
  */
 bool memory_region_is_ram(MemoryRegion *mr);
 
+/**
+ * memory_region_is_rom: check whether a memory region is ROM
+ *
+ * Returns %true is a memory region is read-only memory.
+ *
+ * @mr: the memory region being queried
+ */
+bool memory_region_is_rom(MemoryRegion *mr);
+
 /**
  * memory_region_get_ram_ptr: Get a pointer into a RAM memory region.
  *