diff options
Diffstat (limited to 'arch/s390/kernel/cpcmd.c')
| -rw-r--r-- | arch/s390/kernel/cpcmd.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/s390/kernel/cpcmd.c b/arch/s390/kernel/cpcmd.c new file mode 100644 index 000000000..818958b4f --- /dev/null +++ b/arch/s390/kernel/cpcmd.c @@ -0,0 +1,45 @@ +/* + * arch/s390/kernel/cpcmd.c + * + * S390 version + * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation + * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), + */ + +#include <linux/stddef.h> +#include <linux/kernel.h> +#include <asm/string.h> +#include <asm/ebcdic.h> + +void cpcmd(char *cmd, char *response, int rlen) +{ + const int mask = 0x40000000L; + char obuffer[128]; + int olen; + + olen = strlen(cmd); + strcpy(obuffer, cmd); + ASCEBC(obuffer,olen); + + if (response != NULL && rlen > 0) { + asm volatile ("LRA 2,0(0,%0)\n\t" + "LR 4,%1\n\t" + "O 4,%4\n\t" + "LRA 3,0(0,%2)\n\t" + "LR 5,%3\n\t" + ".long 0x83240008 # Diagnose 83\n\t" + : /* no output */ + : "a" (obuffer), "d" (olen), + "a" (response), "d" (rlen), "m" (mask) + : "2", "3", "4", "5" ); + EBCASC(response, rlen); + } else { + asm volatile ("LRA 2,0(0,%0)\n\t" + "LR 3,%1\n\t" + ".long 0x83230008 # Diagnose 83\n\t" + : /* no output */ + : "a" (obuffer), "d" (olen) + : "2", "3" ); + } +} + |