1 /*
2 * EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
3 *
4 * S390 version
5 * Copyright IBM Corp. 1999
6 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
7 */
8
9 #ifndef _EBCDIC_H
10 #define _EBCDIC_H
11
12 #ifndef _S390_TYPES_H
13 #include <types.h>
14 #endif
15
16 extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */
17 extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */
18 extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */
19 extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */
20 extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */
21 extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */
22
23 static inline void
codepage_convert(const __u8 * codepage,volatile __u8 * addr,unsigned long nr)24 codepage_convert(const __u8 *codepage, volatile __u8 * addr, unsigned long nr)
25 {
26 if (nr-- <= 0)
27 return;
28 asm volatile(
29 " bras 1,1f\n"
30 " tr 0(1,%0),0(%2)\n"
31 "0: tr 0(256,%0),0(%2)\n"
32 " la %0,256(%0)\n"
33 "1: ahi %1,-256\n"
34 " jnm 0b\n"
35 " ex %1,0(1)"
36 : "+&a" (addr), "+&a" (nr)
37 : "a" (codepage) : "cc", "memory", "1");
38 }
39
40 #define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr)
41 #define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr)
42 #define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr)
43 #define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr)
44 #define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr)
45 #define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr)
46
47 #endif
48
49