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