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