Patchwork [02/12,v12] Add API to check whether a physical address is I/O address

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Submitter Wen Congyang
Date March 26, 2012, 10:01 a.m.
Message ID <4F703E73.7000403@cn.fujitsu.com>
Download mbox | patch
Permalink /patch/148672/
State New
Headers show

Comments

Wen Congyang - March 26, 2012, 10:01 a.m.
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(-)

Patch

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 6731ab8..b3fd8cb 100644
--- a/exec.c
+++ b/exec.c
@@ -4657,3 +4657,12 @@  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);
+}