diff options
Diffstat (limited to 'arch/arm/mach-footbridge/include/mach')
-rw-r--r-- | arch/arm/mach-footbridge/include/mach/memory.h | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/arch/arm/mach-footbridge/include/mach/memory.h b/arch/arm/mach-footbridge/include/mach/memory.h index cb16e59d87b..8d64f457408 100644 --- a/arch/arm/mach-footbridge/include/mach/memory.h +++ b/arch/arm/mach-footbridge/include/mach/memory.h | |||
@@ -29,6 +29,8 @@ | |||
29 | #ifndef __ASSEMBLY__ | 29 | #ifndef __ASSEMBLY__ |
30 | extern unsigned long __virt_to_bus(unsigned long); | 30 | extern unsigned long __virt_to_bus(unsigned long); |
31 | extern unsigned long __bus_to_virt(unsigned long); | 31 | extern unsigned long __bus_to_virt(unsigned long); |
32 | extern unsigned long __pfn_to_bus(unsigned long); | ||
33 | extern unsigned long __bus_to_pfn(unsigned long); | ||
32 | #endif | 34 | #endif |
33 | #define __virt_to_bus __virt_to_bus | 35 | #define __virt_to_bus __virt_to_bus |
34 | #define __bus_to_virt __bus_to_virt | 36 | #define __bus_to_virt __bus_to_virt |
@@ -36,14 +38,15 @@ extern unsigned long __bus_to_virt(unsigned long); | |||
36 | #elif defined(CONFIG_FOOTBRIDGE_HOST) | 38 | #elif defined(CONFIG_FOOTBRIDGE_HOST) |
37 | 39 | ||
38 | /* | 40 | /* |
39 | * The footbridge is programmed to expose the system RAM at the corresponding | 41 | * The footbridge is programmed to expose the system RAM at 0xe0000000. |
40 | * address. So, if PAGE_OFFSET is 0xc0000000, RAM appears at 0xe0000000. | 42 | * The requirement is that the RAM isn't placed at bus address 0, which |
41 | * If 0x80000000, then its exposed at 0xa0000000 on the bus. etc. | ||
42 | * The only requirement is that the RAM isn't placed at bus address 0 which | ||
43 | * would clash with VGA cards. | 43 | * would clash with VGA cards. |
44 | */ | 44 | */ |
45 | #define __virt_to_bus(x) ((x) - 0xe0000000) | 45 | #define BUS_OFFSET 0xe0000000 |
46 | #define __bus_to_virt(x) ((x) + 0xe0000000) | 46 | #define __virt_to_bus(x) ((x) + (BUS_OFFSET - PAGE_OFFSET)) |
47 | #define __bus_to_virt(x) ((x) - (BUS_OFFSET - PAGE_OFFSET)) | ||
48 | #define __pfn_to_bus(x) (__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET)) | ||
49 | #define __bus_to_pfn(x) __phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET)) | ||
47 | 50 | ||
48 | #else | 51 | #else |
49 | 52 | ||