projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * include/asm-s390/io.h | |
| 3 | * | |
| 4 | * S390 version | |
| 5 | * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
| 6 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) | |
| 7 | * | |
| 8 | * Derived from "include/asm-i386/io.h" | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef _S390_IO_H | |
| 12 | #define _S390_IO_H | |
| 13 | ||
| 14 | #ifdef __KERNEL__ | |
| 15 | ||
| 1da177e4 LT |
16 | #include <asm/page.h> |
| 17 | ||
| 18 | #define IO_SPACE_LIMIT 0xffffffff | |
| 19 | ||
| 1da177e4 LT |
20 | /* |
| 21 | * Change virtual addresses to physical addresses and vv. | |
| 22 | * These are pretty trivial | |
| 23 | */ | |
| 4448aaf0 | 24 | static inline unsigned long virt_to_phys(volatile void * address) |
| 1da177e4 LT |
25 | { |
| 26 | unsigned long real_address; | |
| 94c12cc7 | 27 | asm volatile( |
| 94c12cc7 | 28 | " lra %0,0(%1)\n" |
| 94c12cc7 MS |
29 | " jz 0f\n" |
| 30 | " la %0,0\n" | |
| 1da177e4 | 31 | "0:" |
| 94c12cc7 | 32 | : "=a" (real_address) : "a" (address) : "cc"); |
| 1da177e4 LT |
33 | return real_address; |
| 34 | } | |
| 35 | ||
| 4448aaf0 | 36 | static inline void * phys_to_virt(unsigned long address) |
| 1da177e4 | 37 | { |
| 022ae414 | 38 | return (void *) address; |
| 1da177e4 LT |
39 | } |
| 40 | ||
| 1da177e4 LT |
41 | /* |
| 42 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem | |
| 43 | * access | |
| 44 | */ | |
| 45 | #define xlate_dev_mem_ptr(p) __va(p) | |
| 46 | ||
| 47 | /* | |
| 48 | * Convert a virtual cached pointer to an uncached pointer | |
| 49 | */ | |
| 50 | #define xlate_dev_kmem_ptr(p) p | |
| 51 | ||
| 52 | #endif /* __KERNEL__ */ | |
| 53 | ||
| 54 | #endif |