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/*

 * Implementation of s390 diagnose codes

 *

 * Copyright IBM Corp. 2007

 * Author(s): Michael Holzheu <holzheu@de.ibm.com>

 */

#include <linux/module.h>

#include <asm/diag.h>

/*

 * Diagnose 10: Release pages

 */

void diag10(unsigned long addr)

{

        if (addr >= 0x7ff00000)

                return;

        asm volatile(

#ifdef CONFIG_64BIT

                "       sam31\n"

                "       diag    %0,%0,0x10\n"

                "0:     sam64\n"

#else

                "       diag    %0,%0,0x10\n"

                "0:\n"

#endif

                EX_TABLE(0b, 0b)

                : : "a" (addr));

}

EXPORT_SYMBOL(diag10);

/*

 * Diagnose 14: Input spool file manipulation

 */

int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)

{

        register unsigned long _ry1 asm("2") = ry1;

        register unsigned long _ry2 asm("3") = subcode;

        int rc = 0;

        asm volatile(

#ifdef CONFIG_64BIT

                "   sam31\n"

                "   diag    %2,2,0x14\n"

                "   sam64\n"

#else

                "   diag    %2,2,0x14\n"

#endif

                "   ipm     %0\n"

                "   srl     %0,28\n"

                : "=d" (rc), "+d" (_ry2)

                : "d" (rx), "d" (_ry1)

                : "cc");

        return rc;

}

EXPORT_SYMBOL(diag14);

/*

 * Diagnose 210: Get information about a virtual device

 */

int diag210(struct diag210 *addr)

{

        /*

         * diag 210 needs its data below the 2GB border, so we

         * use a static data area to be sure

         */

        static struct diag210 diag210_tmp;

        static DEFINE_SPINLOCK(diag210_lock);

        unsigned long flags;

        int ccode;

        spin_lock_irqsave(&diag210_lock, flags);

        diag210_tmp = *addr;

#ifdef CONFIG_64BIT

        asm volatile(

                "       lhi     %0,-1\n"

                "       sam31\n"

                "       diag    %1,0,0x210\n"

                "0:     ipm     %0\n"

                "       srl     %0,28\n"

                "1:     sam64\n"

                EX_TABLE(0b, 1b)

                : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");

#else

        asm volatile(

                "       lhi     %0,-1\n"

                "       diag    %1,0,0x210\n"

                "0:     ipm     %0\n"

                "       srl     %0,28\n"

                "1:\n"

                EX_TABLE(0b, 1b)

                : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");

#endif

        *addr = diag210_tmp;

        spin_unlock_irqrestore(&diag210_lock, flags);

        return ccode;

}

EXPORT_SYMBOL(diag210);