[Qemu-devel] [RFC][PATCH 02/14 v9] Add API to check whether a physical address is I/O address

[Wen Congyang <wency@cn.fujitsu.com>]

This API will be used in the following patch.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
---
 cpu-common.h |    2 ++
 exec.c       |    9 +++++++++
 2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/cpu-common.h b/cpu-common.h
index dca5175..fcd50dc 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 cpu_physical_memory_is_io(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 0c86bce..952bbad 100644
--- a/exec.c
+++ b/exec.c
@@ -4646,3 +4646,12 @@ bool virtio_is_big_endian(void)
 #undef env
 
 #endif
+
+bool cpu_physical_memory_is_io(target_phys_addr_t phys_addr)
+{
+    MemoryRegionSection section;
+
+    section = phys_page_find(phys_addr >> TARGET_PAGE_BITS);
+
+    return !is_ram_rom_romd(&section);
+}
-- 
1.7.1