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Linux kernel mirror (for testing)
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linux
1/*
2 * include/asm-s390/ebcdic.h
3 * EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
4 *
5 * S390 version
6 * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
7 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
8 */
9
10#ifndef _EBCDIC_H
11#define _EBCDIC_H
12
13#ifndef _S390_TYPES_H
14#include <types.h>
15#endif
16
17extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */
18extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */
19extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */
20extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */
21extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */
22extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */
23
24static inline void
25codepage_convert(const __u8 *codepage, volatile __u8 * addr, unsigned long nr)
26{
27 if (nr-- <= 0)
28 return;
29 asm volatile(
30 " bras 1,1f\n"
31 " tr 0(1,%0),0(%2)\n"
32 "0: tr 0(256,%0),0(%2)\n"
33 " la %0,256(%0)\n"
34 "1: ahi %1,-256\n"
35 " jnm 0b\n"
36 " ex %1,0(1)"
37 : "+&a" (addr), "+&a" (nr)
38 : "a" (codepage) : "cc", "memory", "1");
39}
40
41#define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr)
42#define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr)
43#define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr)
44#define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr)
45#define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr)
46#define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr)
47
48#endif
49