X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=include%2Fasm-mips%2Fio.h;h=3a0f33f204d11c4ff18c180d128e9ad062624d58;hb=1a9eeb78b825bfade31d7606a2fe3b9eca9e35be;hp=857fb0302ce2432e6b0173d096a14d5625deb2d3;hpb=8bde7f776c77b343aca29b8c7b58464d915ac245;p=u-boot

diff --git a/include/asm-mips/io.h b/include/asm-mips/io.h
index 857fb0302c..3a0f33f204 100644
--- a/include/asm-mips/io.h
+++ b/include/asm-mips/io.h
@@ -71,7 +71,21 @@
  * instruction, so the lower 16 bits must be zero.  Should be true on
  * on any sane architecture; generic code does not use this assumption.
  */
-extern unsigned long mips_io_port_base;
+extern const unsigned long mips_io_port_base;
+
+/*
+ * Gcc will generate code to load the value of mips_io_port_base after each
+ * function call which may be fairly wasteful in some cases.  So we don't
+ * play quite by the book.  We tell gcc mips_io_port_base is a long variable
+ * which solves the code generation issue.  Now we need to violate the
+ * aliasing rules a little to make initialization possible and finally we
+ * will need the barrier() to fight side effects of the aliasing chat.
+ * This trickery will eventually collapse under gcc's optimizer.  Oh well.
+ */
+static inline void set_io_port_base(unsigned long base)
+{
+	* (unsigned long *) &mips_io_port_base = base;
+}
 
 /*
  * Thanks to James van Artsdalen for a better timing-fix than
@@ -106,7 +120,7 @@ extern unsigned long mips_io_port_base;
  */
 extern inline unsigned long virt_to_phys(volatile void * address)
 {
-	return PHYSADDR(address);
+	return CPHYSADDR(address);
 }
 
 extern inline void * phys_to_virt(unsigned long address)
@@ -119,7 +133,7 @@ extern inline void * phys_to_virt(unsigned long address)
  */
 extern inline unsigned long virt_to_bus(volatile void * address)
 {
-	return PHYSADDR(address);
+	return CPHYSADDR(address);
 }
 
 extern inline void * bus_to_virt(unsigned long address)
@@ -447,4 +461,32 @@ extern void (*_dma_cache_inv)(unsigned long start, unsigned long size);
 #define dma_cache_wback(start,size)	_dma_cache_wback(start,size)
 #define dma_cache_inv(start,size)	_dma_cache_inv(start,size)
 
+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".
+ */
+#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)
+{
+
+}
+
 #endif /* _ASM_IO_H */