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-rw-r--r--cpu-common.h4
-rw-r--r--exec.c12
2 files changed, 16 insertions, 0 deletions
diff --git a/cpu-common.h b/cpu-common.h
index dca5175652..1fe3280701 100644
--- a/cpu-common.h
+++ b/cpu-common.h
@@ -71,6 +71,10 @@ void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len,
void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque));
void cpu_unregister_map_client(void *cookie);
+#ifndef CONFIG_USER_ONLY
+bool cpu_physical_memory_is_io(target_phys_addr_t phys_addr);
+#endif
+
/* Coalesced MMIO regions are areas where write operations can be reordered.
* This usually implies that write operations are side-effect free. This allows
* batching which can make a major impact on performance when using
diff --git a/exec.c b/exec.c
index a0494c72bf..1b65859e50 100644
--- a/exec.c
+++ b/exec.c
@@ -4336,3 +4336,15 @@ bool virtio_is_big_endian(void)
}
#endif
+
+#ifndef CONFIG_USER_ONLY
+bool cpu_physical_memory_is_io(target_phys_addr_t phys_addr)
+{
+ MemoryRegionSection *section;
+
+ section = phys_page_find(phys_addr >> TARGET_PAGE_BITS);
+
+ return !(memory_region_is_ram(section->mr) ||
+ memory_region_is_romd(section->mr));
+}
+#endif