1 /* 2 * include/asm-s390/ebcdic.h 3 * EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines. 4 * 5 * S390 version 6 * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation 7 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> 8 */ 9 10 #ifndef _EBCDIC_H 11 #define _EBCDIC_H 12 13 #ifndef _S390_TYPES_H 14 #include <types.h> 15 #endif 16 17 extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */ 18 extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */ 19 extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */ 20 extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */ 21 extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */ 22 extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */ 23 24 static inline void 25 codepage_convert(const __u8 *codepage, volatile __u8 * addr, unsigned long nr) 26 { 27 if (nr-- <= 0) 28 return; 29 asm volatile( 30 " bras 1,1f\n" 31 " tr 0(1,%0),0(%2)\n" 32 "0: tr 0(256,%0),0(%2)\n" 33 " la %0,256(%0)\n" 34 "1: ahi %1,-256\n" 35 " jnm 0b\n" 36 " ex %1,0(1)" 37 : "+&a" (addr), "+&a" (nr) 38 : "a" (codepage) : "cc", "memory", "1"); 39 } 40 41 #define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr) 42 #define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr) 43 #define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr) 44 #define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr) 45 #define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr) 46 #define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr) 47 48 #endif 49 50