/*      $NetBSD: memc_3min.c,v 1.15 2019/08/21 04:17:41 msaitoh Exp $   */

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department and Ralph Campbell.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * from: Utah Hdr: trap.c 1.32 91/04/06
 *
 *      @(#)trap.c      8.5 (Berkeley) 1/11/94
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: memc_3min.c,v 1.15 2019/08/21 04:17:41 msaitoh Exp $");

/*
 * Motherboard memory error controller used in both
 * 3min (kn02ba) and maxine (kn02ca).
 */

#include <sys/types.h>
#include <sys/systm.h>

#include <mips/cpuregs.h>

#include <pmax/pmax/kmin.h>
#include <pmax/pmax/memc.h>

/*
 * Handle error
 * All we can do with parity is panic.
 * XXX check for clean user pages, replace frame,  and reload ?
 */
void
kn02ba_errintr(void)
{
        paddr_t err, adr;
        size_t siz;
        uint32_t mer;
        static unsigned int errintr_cnt = 0;

        siz = *(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(KMIN_REG_MSR);
        mer = *(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(KMIN_REG_MER);
        adr = *(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(KMIN_REG_AER);

        /* clear interrupt bit */
        *(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(KMIN_REG_TIMEOUT) = 0;

        err = 0;        /* XXX gcc */
        switch (mer & KMIN_MER_LASTBYTE) {
        case KMIN_LASTB31:
                err = 3; break;
        case KMIN_LASTB23:
                err = 2; break;
        case KMIN_LASTB15:
                err = 1; break;
        case KMIN_LASTB07:
                err = 0; break;
        }
        err |= (adr & KMIN_AER_ADDR_MASK);

        errintr_cnt++;
        printf("(%u)Bad memory chip at phys %#"PRIxPADDR
            " [%x %zx %#"PRIxPADDR"]\n",
            errintr_cnt, err, mer, siz, adr);
}