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[02/12,v14] Add API to check whether a physical address is I/O address

Message ID 4F96259F.3040003@cn.fujitsu.com
State New
Headers show

Commit Message

Wen Congyang April 24, 2012, 4:01 a.m. UTC 
This API will be used in the following patch.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
---
 cpu-common.h |    4 ++++
 exec.c       |   11 +++++++++++
 2 files changed, 15 insertions(+), 0 deletions(-)
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Patch

diff --git a/cpu-common.h b/cpu-common.h
index dca5175..1fe3280 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 77d6866..eb6491b 100644
--- a/exec.c
+++ b/exec.c
@@ -4662,3 +4662,14 @@  bool virtio_is_big_endian(void)
 #undef env
 
 #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 !is_ram_rom_romd(section);
+}
+#endif