48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
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*
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* S390 version
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* Copyright IBM Corp. 1999
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#ifndef _EBCDIC_H
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#define _EBCDIC_H
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#include <linux/types.h>
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extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */
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extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */
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extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */
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extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */
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extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */
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extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */
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static inline void
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codepage_convert(const __u8 *codepage, volatile __u8 * addr, unsigned long nr)
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{
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if (nr-- <= 0)
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return;
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asm volatile(
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" bras 1,1f\n"
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" tr 0(1,%0),0(%2)\n"
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"0: tr 0(256,%0),0(%2)\n"
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" la %0,256(%0)\n"
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"1: ahi %1,-256\n"
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" jnm 0b\n"
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" ex %1,0(1)"
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: "+&a" (addr), "+&a" (nr)
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: "a" (codepage) : "cc", "memory", "1");
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}
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#define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr)
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#define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr)
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#define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr)
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#define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr)
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#define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr)
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#define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr)
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#endif
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