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Viewing changes to arch/s390/kernel/diag.c

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/s390/kernel/diag.c
 
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/*
 
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 * Implementation of s390 diagnose codes
 
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 *
 
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 * Copyright IBM Corp. 2007
 
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 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
 
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 */
 
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#include <linux/module.h>
 
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#include <asm/diag.h>
 
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/*
 
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 * Diagnose 14: Input spool file manipulation
 
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 */
 
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int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
 
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{
 
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        register unsigned long _ry1 asm("2") = ry1;
 
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        register unsigned long _ry2 asm("3") = subcode;
 
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        int rc = 0;
 
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        asm volatile(
 
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#ifdef CONFIG_64BIT
 
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                "   sam31\n"
 
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                "   diag    %2,2,0x14\n"
 
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                "   sam64\n"
 
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#else
 
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                "   diag    %2,2,0x14\n"
 
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#endif
 
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                "   ipm     %0\n"
 
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                "   srl     %0,28\n"
 
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                : "=d" (rc), "+d" (_ry2)
 
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                : "d" (rx), "d" (_ry1)
 
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                : "cc");
 
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        return rc;
 
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}
 
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EXPORT_SYMBOL(diag14);
 
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/*
 
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 * Diagnose 210: Get information about a virtual device
 
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 */
 
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int diag210(struct diag210 *addr)
 
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{
 
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        /*
 
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         * diag 210 needs its data below the 2GB border, so we
 
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         * use a static data area to be sure
 
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         */
 
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        static struct diag210 diag210_tmp;
 
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        static DEFINE_SPINLOCK(diag210_lock);
 
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        unsigned long flags;
 
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        int ccode;
 
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        spin_lock_irqsave(&diag210_lock, flags);
 
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        diag210_tmp = *addr;
 
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#ifdef CONFIG_64BIT
 
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        asm volatile(
 
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                "       lhi     %0,-1\n"
 
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                "       sam31\n"
 
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                "       diag    %1,0,0x210\n"
 
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                "0:     ipm     %0\n"
 
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                "       srl     %0,28\n"
 
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                "1:     sam64\n"
 
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                EX_TABLE(0b, 1b)
 
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                : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
 
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#else
 
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        asm volatile(
 
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                "       lhi     %0,-1\n"
 
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                "       diag    %1,0,0x210\n"
 
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                "0:     ipm     %0\n"
 
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                "       srl     %0,28\n"
 
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                "1:\n"
 
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                EX_TABLE(0b, 1b)
 
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                : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
 
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#endif
 
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        *addr = diag210_tmp;
 
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        spin_unlock_irqrestore(&diag210_lock, flags);
 
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        return ccode;
 
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}
 
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EXPORT_SYMBOL(diag210);