projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 | 2 | /* |
| 1da177e4 LT |
3 | * EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines. |
| 4 | * | |
| 5 | * S390 version | |
| a53c8fab | 6 | * Copyright IBM Corp. 1999 |
| 1da177e4 LT |
7 | * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef _EBCDIC_H | |
| 11 | #define _EBCDIC_H | |
| 12 | ||
| 2edf3fa5 | 13 | #include <linux/types.h> |
| 1da177e4 | 14 | |
| 06642997 PO |
15 | extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */ |
| 16 | extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */ | |
| 17 | extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */ | |
| 18 | extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */ | |
| 19 | extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */ | |
| 20 | extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */ | |
| 1da177e4 | 21 | |
| 4448aaf0 | 22 | static inline void |
| 4ae98789 | 23 | codepage_convert(const __u8 *codepage, volatile char *addr, unsigned long nr) |
| 1da177e4 LT |
24 | { |
| 25 | if (nr-- <= 0) | |
| 26 | return; | |
| 94c12cc7 MS |
27 | asm volatile( |
| 28 | " bras 1,1f\n" | |
| 29 | " tr 0(1,%0),0(%2)\n" | |
| 30 | "0: tr 0(256,%0),0(%2)\n" | |
| 31 | " la %0,256(%0)\n" | |
| 32 | "1: ahi %1,-256\n" | |
| 33 | " jnm 0b\n" | |
| 34 | " ex %1,0(1)" | |
| 35 | : "+&a" (addr), "+&a" (nr) | |
| 36 | : "a" (codepage) : "cc", "memory", "1"); | |
| 1da177e4 LT |
37 | } |
| 38 | ||
| 39 | #define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr) | |
| 40 | #define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr) | |
| 41 | #define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr) | |
| 42 | #define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr) | |
| 43 | #define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr) | |
| 44 | #define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr) | |
| 45 | ||
| 46 | #endif | |
| 47 |