Introduce map_physmem() and unmap_physmem()

[people/ms/u-boot.git] / include / asm-arm / io.h

diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h
index 47c18e7e86965defdf8500c739bffe4dc1424a19..029b7f9eeb41de1431927e00a26e2aea980e7eef 100644 (file)
--- a/include/asm-arm/io.h
+++ b/include/asm-arm/io.h
@@ -33,6 +33,32 @@ static inline void sync(void)
 {
 }
 
+/*
+ * Given a physical address and a length, return a virtual address
+ * that can be used to access the memory range with the caching
+ * properties specified by "flags".
+ */
+typedef unsigned long phys_addr_t;
+
+#define MAP_NOCACHE    (0)
+#define MAP_WRCOMBINE  (0)
+#define MAP_WRBACK     (0)
+#define MAP_WRTHROUGH  (0)
+
+static inline void *
+map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
+{
+       return (void *)paddr;
+}
+
+/*
+ * Take down a mapping set up by map_physmem().
+ */
+static inline void unmap_physmem(void *vaddr, unsigned long flags)
+{
+
+}
+
 /*
  * Generic virtual read/write.  Note that we don't support half-word
  * read/writes.  We define __arch_*[bl] here, and leave __arch_*w