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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/s390/include/asm/ebcdic.h
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/*

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 *  include/asm-s390/ebcdic.h

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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 (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation

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 *    Author(s): Martin Schwidefsky <[email protected]>

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 */

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#ifndef _EBCDIC_H

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#define _EBCDIC_H

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#ifndef _S390_TYPES_H

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#include <types.h>

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#endif

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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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