Merge branch 'agp-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...

[pandora-kernel.git] / arch / arm / mach-footbridge / include / mach / memory.h

diff --git a/arch/arm/mach-footbridge/include/mach/memory.h b/arch/arm/mach-footbridge/include/mach/memory.h
index cb16e59..8d64f45 100644 (file)
--- a/arch/arm/mach-footbridge/include/mach/memory.h
+++ b/arch/arm/mach-footbridge/include/mach/memory.h
@@ -29,6 +29,8 @@
 #ifndef __ASSEMBLY__
 extern unsigned long __virt_to_bus(unsigned long);
 extern unsigned long __bus_to_virt(unsigned long);
+extern unsigned long __pfn_to_bus(unsigned long);
+extern unsigned long __bus_to_pfn(unsigned long);
 #endif
 #define __virt_to_bus  __virt_to_bus
 #define __bus_to_virt  __bus_to_virt
@@ -36,14 +38,15 @@ extern unsigned long __bus_to_virt(unsigned long);
 #elif defined(CONFIG_FOOTBRIDGE_HOST)
 
 /*
- * The footbridge is programmed to expose the system RAM at the corresponding
- * address.  So, if PAGE_OFFSET is 0xc0000000, RAM appears at 0xe0000000.
- * If 0x80000000, then its exposed at 0xa0000000 on the bus. etc.
- * The only requirement is that the RAM isn't placed at bus address 0 which
+ * The footbridge is programmed to expose the system RAM at 0xe0000000.
+ * The requirement is that the RAM isn't placed at bus address 0, which
  * would clash with VGA cards.
  */
-#define __virt_to_bus(x)       ((x) - 0xe0000000)
-#define __bus_to_virt(x)       ((x) + 0xe0000000)
+#define BUS_OFFSET             0xe0000000
+#define __virt_to_bus(x)       ((x) + (BUS_OFFSET - PAGE_OFFSET))
+#define __bus_to_virt(x)       ((x) - (BUS_OFFSET - PAGE_OFFSET))
+#define __pfn_to_bus(x)                (__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET))
+#define __bus_to_pfn(x)                __phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET))
 
 #else