diff options
Diffstat (limited to 'arch/arm/mach-footbridge/include/mach/memory.h')
-rw-r--r-- | arch/arm/mach-footbridge/include/mach/memory.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/mach-footbridge/include/mach/memory.h b/arch/arm/mach-footbridge/include/mach/memory.h index 6ae2f1a07ab..cb16e59d87b 100644 --- a/arch/arm/mach-footbridge/include/mach/memory.h +++ b/arch/arm/mach-footbridge/include/mach/memory.h | |||
@@ -30,9 +30,18 @@ | |||
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 | #endif | 32 | #endif |
33 | #define __virt_to_bus __virt_to_bus | ||
34 | #define __bus_to_virt __bus_to_virt | ||
33 | 35 | ||
34 | #elif defined(CONFIG_FOOTBRIDGE_HOST) | 36 | #elif defined(CONFIG_FOOTBRIDGE_HOST) |
35 | 37 | ||
38 | /* | ||
39 | * The footbridge is programmed to expose the system RAM at the corresponding | ||
40 | * address. So, if PAGE_OFFSET is 0xc0000000, RAM appears at 0xe0000000. | ||
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. | ||
44 | */ | ||
36 | #define __virt_to_bus(x) ((x) - 0xe0000000) | 45 | #define __virt_to_bus(x) ((x) - 0xe0000000) |
37 | #define __bus_to_virt(x) ((x) + 0xe0000000) | 46 | #define __bus_to_virt(x) ((x) + 0xe0000000) |
38 | 47 | ||