1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
2c6557e7fSMartin Schwidefsky /*
3c6557e7fSMartin Schwidefsky * EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
4c6557e7fSMartin Schwidefsky *
5c6557e7fSMartin Schwidefsky * S390 version
6a53c8fabSHeiko Carstens * Copyright IBM Corp. 1999
7c6557e7fSMartin Schwidefsky * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
8c6557e7fSMartin Schwidefsky */
9c6557e7fSMartin Schwidefsky
10c6557e7fSMartin Schwidefsky #ifndef _EBCDIC_H
11c6557e7fSMartin Schwidefsky #define _EBCDIC_H
12c6557e7fSMartin Schwidefsky
132edf3fa5SHeiko Carstens #include <linux/types.h>
14c6557e7fSMartin Schwidefsky
15c6557e7fSMartin Schwidefsky extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */
16c6557e7fSMartin Schwidefsky extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */
17c6557e7fSMartin Schwidefsky extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */
18c6557e7fSMartin Schwidefsky extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */
19c6557e7fSMartin Schwidefsky extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */
20c6557e7fSMartin Schwidefsky extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */
21c6557e7fSMartin Schwidefsky
22c6557e7fSMartin Schwidefsky static inline void
codepage_convert(const __u8 * codepage,volatile char * addr,unsigned long nr)23*4ae98789SArnd Bergmann codepage_convert(const __u8 *codepage, volatile char *addr, unsigned long nr)
24c6557e7fSMartin Schwidefsky {
25c6557e7fSMartin Schwidefsky if (nr-- <= 0)
26c6557e7fSMartin Schwidefsky return;
27c6557e7fSMartin Schwidefsky asm volatile(
28c6557e7fSMartin Schwidefsky " bras 1,1f\n"
29c6557e7fSMartin Schwidefsky " tr 0(1,%0),0(%2)\n"
30c6557e7fSMartin Schwidefsky "0: tr 0(256,%0),0(%2)\n"
31c6557e7fSMartin Schwidefsky " la %0,256(%0)\n"
32c6557e7fSMartin Schwidefsky "1: ahi %1,-256\n"
33c6557e7fSMartin Schwidefsky " jnm 0b\n"
34c6557e7fSMartin Schwidefsky " ex %1,0(1)"
35c6557e7fSMartin Schwidefsky : "+&a" (addr), "+&a" (nr)
36c6557e7fSMartin Schwidefsky : "a" (codepage) : "cc", "memory", "1");
37c6557e7fSMartin Schwidefsky }
38c6557e7fSMartin Schwidefsky
39c6557e7fSMartin Schwidefsky #define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr)
40c6557e7fSMartin Schwidefsky #define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr)
41c6557e7fSMartin Schwidefsky #define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr)
42c6557e7fSMartin Schwidefsky #define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr)
43c6557e7fSMartin Schwidefsky #define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr)
44c6557e7fSMartin Schwidefsky #define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr)
45c6557e7fSMartin Schwidefsky
46c6557e7fSMartin Schwidefsky #endif
47c6557e7fSMartin Schwidefsky
48