ARM: fix clps711x, footbridge, integrator, ixp2000, ixp2300 and s3c build bug

Anders Grafström reports that footbridge fails to build after 1c4a4f4.
Fix this by adding the necessary definitions for __pfn_to_bus and
__bus_to_pfn.

Reported-by: Anders Grafström <anders.grafstrom@netinsight.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 28 insertions, 9 deletions

diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c
index b97f529e58e8..41febc796b1c 100644
--- a/arch/arm/mach-footbridge/common.c
+++ b/arch/arm/mach-footbridge/common.c
@@ -201,6 +201,11 @@ void __init footbridge_map_io(void)
 
 #ifdef CONFIG_FOOTBRIDGE_ADDIN
 
+static inline unsigned long fb_bus_sdram_offset(void)
+{
+        return *CSR_PCISDRAMBASE & 0xfffffff0;
+}
+
 /*
  * These two functions convert virtual addresses to PCI addresses and PCI
  * addresses to virtual addresses.  Note that it is only legal to use these
@@ -210,14 +215,13 @@ unsigned long __virt_to_bus(unsigned long res)
 {
         WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
 
-        return (res - PAGE_OFFSET) + (*CSR_PCISDRAMBASE & 0xfffffff0);
+        return res + (fb_bus_sdram_offset() - PAGE_OFFSET);
 }
 EXPORT_SYMBOL(__virt_to_bus);
 
 unsigned long __bus_to_virt(unsigned long res)
 {
-        res -= (*CSR_PCISDRAMBASE & 0xfffffff0);
-        res += PAGE_OFFSET;
+        res = res - (fb_bus_sdram_offset() - PAGE_OFFSET);
 
         WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
 
@@ -225,4 +229,16 @@ unsigned long __bus_to_virt(unsigned long res)
 }
 EXPORT_SYMBOL(__bus_to_virt);
 
+unsigned long __pfn_to_bus(unsigned long pfn)
+{
+        return __pfn_to_phys(pfn) + (fb_bus_sdram_offset() - PHYS_OFFSET));
+}
+EXPORT_SYMBOL(__pfn_to_bus);
+
+unsigned long __bus_to_pfn(unsigned long bus)
+{
+        return __phys_to_pfn(bus - (fb_bus_sdram_offset() - PHYS_OFFSET));
+}
+EXPORT_SYMBOL(__bus_to_pfn);
+
 #endif
diff --git a/arch/arm/mach-footbridge/include/mach/memory.h b/arch/arm/mach-footbridge/include/mach/memory.h
index cb16e59d87b6..8d64f4574087 100644
--- 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