memory: Provide memory_region_init_rom()
Provide a new helper function memory_region_init_rom() for memory
regions which are read-only (and unlike those created by
memory_region_init_rom_device() don't have special behaviour
for writes). This has the same behaviour as calling
memory_region_init_ram() and then memory_region_set_readonly()
(which is what we do today in boards with pure ROMs) but is a
more easily discoverable API for the purpose.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1467122287-24974-2-git-send-email-peter.maydell@linaro.org
diff --git a/memory.c b/memory.c
index 33799e8..ecb565e 100644
--- a/memory.c
+++ b/memory.c
@@ -1376,6 +1376,21 @@
mr->alias_offset = offset;
}
+void memory_region_init_rom(MemoryRegion *mr,
+ struct Object *owner,
+ const char *name,
+ uint64_t size,
+ Error **errp)
+{
+ memory_region_init(mr, owner, name, size);
+ mr->ram = true;
+ mr->readonly = true;
+ mr->terminates = true;
+ mr->destructor = memory_region_destructor_ram;
+ mr->ram_block = qemu_ram_alloc(size, mr, errp);
+ mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
+}
+
void memory_region_init_rom_device(MemoryRegion *mr,
Object *owner,
const MemoryRegionOps *ops,