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 #include <linux/types.h> 13 14 extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */ 15 extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */ 16 extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */ 17 extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */ 18 extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */ 19 extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */ 20 21 static inline void 22 codepage_convert(const __u8 *codepage, volatile __u8 * addr, unsigned long nr) 23 { 24 if (nr-- <= 0) 25 return; 26 asm volatile( 27 " bras 1,1f\n" 28 " tr 0(1,%0),0(%2)\n" 29 "0: tr 0(256,%0),0(%2)\n" 30 " la %0,256(%0)\n" 31 "1: ahi %1,-256\n" 32 " jnm 0b\n" 33 " ex %1,0(1)" 34 : "+&a" (addr), "+&a" (nr) 35 : "a" (codepage) : "cc", "memory", "1"); 36 } 37 38 #define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr) 39 #define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr) 40 #define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr) 41 #define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr) 42 #define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr) 43 #define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr) 44 45 #endif 46 47