| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __UM_IO_H |
| 2 | #define __UM_IO_H |
| 3 | |
| 4 | #include "asm/page.h" |
| 5 | |
| 6 | #define IO_SPACE_LIMIT 0xdeadbeef /* Sure hope nothing uses this */ |
| 7 | |
| 8 | static inline int inb(unsigned long i) { return(0); } |
| 9 | static inline void outb(char c, unsigned long i) { } |
| 10 | |
| 11 | /* |
| 12 | * Change virtual addresses to physical addresses and vv. |
| 13 | * These are pretty trivial |
| 14 | */ |
| 15 | static inline unsigned long virt_to_phys(volatile void * address) |
| 16 | { |
| 17 | return __pa((void *) address); |
| 18 | } |
| 19 | |
| 20 | static inline void * phys_to_virt(unsigned long address) |
| 21 | { |
| 22 | return __va(address); |
| 23 | } |
| 24 | |
| 25 | /* |
| 26 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem |
| 27 | * access |
| 28 | */ |
| 29 | #define xlate_dev_mem_ptr(p) __va(p) |
| 30 | |
| 31 | /* |
| 32 | * Convert a virtual cached pointer to an uncached pointer |
| 33 | */ |
| 34 | #define xlate_dev_kmem_ptr(p) p |
| 35 | |
| 36 | #endif |