Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / s390 / include / asm / ebcdic.h

diff --git a/kernel/arch/s390/include/asm/ebcdic.h b/kernel/arch/s390/include/asm/ebcdic.h
new file mode 100644 (file)
index 0000000..c5befc5
--- /dev/null
+++ b/kernel/arch/s390/include/asm/ebcdic.h
@@ -0,0 +1,48 @@
+/*
+ *    EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
+ *
+ *  S390 version
+ *    Copyright IBM Corp. 1999
+ *    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
+