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 17extern __u8 _ascebc_500[]; /* ASCII -> EBCDIC 500 conversion table */ 18extern __u8 _ebcasc_500[]; /* EBCDIC 500 -> ASCII conversion table */ 19extern __u8 _ascebc[]; /* ASCII -> EBCDIC conversion table */ 20extern __u8 _ebcasc[]; /* EBCDIC -> ASCII conversion table */ 21extern __u8 _ebc_tolower[]; /* EBCDIC -> lowercase */ 22extern __u8 _ebc_toupper[]; /* EBCDIC -> uppercase */ 23 24extern __inline__ void 25codepage_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 " jp 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