1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 /*
3 * EBCDIC -> ASCII, ASCII -> EBCDIC convers
4 *
5 * S390 version
6 * Copyright IBM Corp. 1999
7 * Author(s): Martin Schwidefsky <schwidefs
8 */
9
10 #ifndef _EBCDIC_H
11 #define _EBCDIC_H
12
13 #include <linux/types.h>
14
15 extern __u8 _ascebc_500[256]; /* ASCII -> EB
16 extern __u8 _ebcasc_500[256]; /* EBCDIC 500
17 extern __u8 _ascebc[256]; /* ASCII -> EBCDIC
18 extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII
19 extern __u8 _ebc_tolower[256]; /* EBCDIC -> lo
20 extern __u8 _ebc_toupper[256]; /* EBCDIC -> up
21
22 static inline void
23 codepage_convert(const __u8 *codepage, volatil
24 {
25 if (nr-- <= 0)
26 return;
27 asm volatile(
28 " bras 1,1f\n"
29 " tr 0(1,%0),0(%2)\
30 "0: tr 0(256,%0),0(%2
31 " la %0,256(%0)\n"
32 "1: ahi %1,-256\n"
33 " jnm 0b\n"
34 " ex %1,0(1)"
35 : "+&a" (addr), "+&a" (nr)
36 : "a" (codepage) : "cc", "memo
37 }
38
39 #define ASCEBC(addr,nr) codepage_convert(_asce
40 #define EBCASC(addr,nr) codepage_convert(_ebca
41 #define ASCEBC_500(addr,nr) codepage_convert(_
42 #define EBCASC_500(addr,nr) codepage_convert(_
43 #define EBC_TOLOWER(addr,nr) codepage_convert(
44 #define EBC_TOUPPER(addr,nr) codepage_convert(
45
46 #endif
47
48
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