diff options
Diffstat (limited to 'include/asm-arm/arch-ixp23xx/memory.h')
| -rw-r--r-- | include/asm-arm/arch-ixp23xx/memory.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/asm-arm/arch-ixp23xx/memory.h b/include/asm-arm/arch-ixp23xx/memory.h index bebcf0aa0d7..6e19f46d54d 100644 --- a/include/asm-arm/arch-ixp23xx/memory.h +++ b/include/asm-arm/arch-ixp23xx/memory.h @@ -28,6 +28,7 @@ * to an address that the kernel can use. */ #ifndef __ASSEMBLY__ +#include <asm/mach-types.h> #define __virt_to_bus(v) \ ({ unsigned int ret; \ @@ -40,6 +41,22 @@ data = *((volatile int *)IXP23XX_PCI_SDRAM_BAR); \ __phys_to_virt((((b - (data & 0xfffffff0)) + 0x00000000))); }) +/* + * Coherency support. Only supported on A2 CPUs or on A1 + * systems that have the cache coherency workaround. + */ +static inline int __ixp23xx_arch_is_coherent(void) +{ + extern unsigned int processor_id; + + if (((processor_id & 15) >= 2) || machine_is_roadrunner()) + return 1; + + return 0; +} + +#define arch_is_coherent() __ixp23xx_arch_is_coherent() + #endif |