diff options
Diffstat (limited to 'include/asm-ppc/io.h')
| -rw-r--r-- | include/asm-ppc/io.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-ppc/io.h b/include/asm-ppc/io.h index a4be6b7e2..6e5a57ad6 100644 --- a/include/asm-ppc/io.h +++ b/include/asm-ppc/io.h @@ -161,6 +161,20 @@ extern inline void * bus_to_virt(unsigned long address) } /* + * The PCI bus bridge can translate addresses issued by the processor(s) + * into a different address on the PCI bus. On 32-bit cpus, we assume + * this mapping is 1-1, but on 64-bit systems it often isn't. + */ +#ifndef CONFIG_PPC64BRIDGE +#define phys_to_bus(x) (x) +#define bus_to_phys(x) (x) + +#else +extern unsigned long phys_to_bus(unsigned long pa); +extern unsigned long bus_to_phys(unsigned int ba, int busnr); +#endif /* CONFIG_PPC64BRIDGE */ + +/* * Change virtual addresses to physical addresses and vv, for * addresses in the area where the kernel has the RAM mapped. */ |