This API will be used in the following patch.
Signed-off-by: Wen Congyang <[email protected]>
---
cpu-common.h | 2 ++
exec.c | 16 ++++++++++++++++
2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/cpu-common.h b/cpu-common.h
index a40c57d..d047137 100644
--- a/cpu-common.h
+++ b/cpu-common.h
@@ -71,6 +71,8 @@ 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);
+bool is_io_addr(target_phys_addr_t phys_addr);
+
/* 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 b81677a..edc5684 100644
--- a/exec.c
+++ b/exec.c
@@ -4435,3 +4435,19 @@ bool virtio_is_big_endian(void)
#undef env
#endif
+
+bool is_io_addr(target_phys_addr_t phys_addr)
+{
+ ram_addr_t pd;
+ PhysPageDesc p;
+
+ p = phys_page_find(phys_addr >> TARGET_PAGE_BITS);
+ pd = p.phys_offset;
+
+ if (!is_ram_rom_romd(pd)) {
+ /* I/O region */
+ return true;
+ }
+
+ return false;
+}
--
1.7.1
