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47 lines
1.4 KiB
47 lines
1.4 KiB
/* 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 <[email protected]> |
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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 char *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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