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/*
* include/asm-s390/ebcdic.h
* EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef _EBCDIC_H
#define _EBCDIC_H
#ifndef _S390_TYPES_H
#include <types.h>
#endif
extern __u8 _ascebc_500[]; /* ASCII -> EBCDIC 500 conversion table */
extern __u8 _ebcasc_500[]; /* EBCDIC 500 -> ASCII conversion table */
extern __u8 _ascebc[]; /* ASCII -> EBCDIC conversion table */
extern __u8 _ebcasc[]; /* EBCDIC -> ASCII conversion table */
extern __u8 _ebc_tolower[]; /* EBCDIC -> lowercase */
extern __u8 _ebc_toupper[]; /* EBCDIC -> uppercase */
extern __inline__ void
codepage_convert(const __u8 *codepage, volatile __u8 * addr, unsigned long nr)
{
static const __u16 tr_op[] = { 0xDC00, 0x1000,0x3000 };
__asm__ __volatile__(
" lgr 1,%0\n"
" lgr 2,%1\n"
" lgr 3,%2\n"
" aghi 2,-256\n"
" jm 1f\n"
"0: tr 0(256,1),0(3)\n"
" aghi 1,256\n"
" aghi 2,-256\n"
" jp 0b\n"
"1: aghi 2,255\n"
" jm 2f\n"
" ex 2,%3\n"
"2:"
: /* no output */
: "a" (addr), "d" (nr), "a" (codepage), "m" (tr_op[0])
: "cc", "memory", "1", "2", "3" );
}
#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
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