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[];   /* ASCII -> EBCDIC 500 conversion table */
18extern __u8 _ebcasc_500[];   /* EBCDIC 500 -> ASCII conversion table */
19extern __u8 _ascebc[];   /* ASCII -> EBCDIC conversion table */
20extern __u8 _ebcasc[];   /* EBCDIC -> ASCII conversion table */
21extern __u8 _ebc_tolower[]; /* EBCDIC -> lowercase */
22extern __u8 _ebc_toupper[]; /* EBCDIC -> uppercase */
23
24extern __inline__
25void codepage_convert(const __u8 *codepage, volatile __u8 * addr, int 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		"   jp   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
50