Patchwork [RFC,02/16,v8] Add API to check whether a physical address is I/O address

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Submitter Wen Congyang
Date March 2, 2012, 10:06 a.m.
Message ID <4F509BA8.5070600@cn.fujitsu.com>
Download mbox | patch
Permalink /patch/144191/
State New
Headers show

Comments

Wen Congyang - March 2, 2012, 10:06 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       |   11 +++++++++++
 2 files changed, 13 insertions(+), 0 deletions(-)

Patch

diff --git a/cpu-common.h b/cpu-common.h
index a40c57d..fde3e5d 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 b81677a..2114dd5 100644
--- a/exec.c
+++ b/exec.c
@@ -4435,3 +4435,14 @@  bool virtio_is_big_endian(void)
 #undef env
 
 #endif
+
+bool cpu_physical_memory_is_io(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;
+
+    return !is_ram_rom_romd(pd);
+}