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-rw-r--r--arch/s390/include/asm/ebcdic.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ebcdic.h b/arch/s390/include/asm/ebcdic.h
new file mode 100644
index 000000000000..7f6f641d32f4
--- /dev/null
+++ b/arch/s390/include/asm/ebcdic.h
@@ -0,0 +1,49 @@
+/*
+ * include/asm-s390/ebcdic.h
+ * EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
+ *
+ * S390 version
+ * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#ifndef _EBCDIC_H
+#define _EBCDIC_H
+
+#ifndef _S390_TYPES_H
+#include <types.h>
+#endif
+
+extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */
+extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */
+extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */
+extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */
+extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */
+extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */
+
+static inline void
+codepage_convert(const __u8 *codepage, volatile __u8 * addr, unsigned long nr)
+{
+ if (nr-- <= 0)
+ return;
+ asm volatile(
+ " bras 1,1f\n"
+ " tr 0(1,%0),0(%2)\n"
+ "0: tr 0(256,%0),0(%2)\n"
+ " la %0,256(%0)\n"
+ "1: ahi %1,-256\n"
+ " jnm 0b\n"
+ " ex %1,0(1)"
+ : "+&a" (addr), "+&a" (nr)
+ : "a" (codepage) : "cc", "memory", "1");
+}
+
+#define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr)
+#define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr)
+#define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr)
+#define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr)
+#define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr)
+#define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr)
+
+#endif
+

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