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      1 /*	$NetBSD: memc_3min.c,v 1.15 2019/08/21 04:17:41 msaitoh Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1992, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department and Ralph Campbell.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  * from: Utah Hdr: trap.c 1.32 91/04/06
     37  *
     38  *	@(#)trap.c	8.5 (Berkeley) 1/11/94
     39  */
     40 
     41 #include <sys/cdefs.h>
     42 __KERNEL_RCSID(0, "$NetBSD: memc_3min.c,v 1.15 2019/08/21 04:17:41 msaitoh Exp $");
     43 
     44 /*
     45  * Motherboard memory error controller used in both
     46  * 3min (kn02ba) and maxine (kn02ca).
     47  */
     48 
     49 #include <sys/types.h>
     50 #include <sys/systm.h>
     51 
     52 #include <mips/cpuregs.h>
     53 
     54 #include <pmax/pmax/kmin.h>
     55 #include <pmax/pmax/memc.h>
     56 
     57 /*
     58  * Handle error
     59  * All we can do with parity is panic.
     60  * XXX check for clean user pages, replace frame,  and reload ?
     61  */
     62 void
     63 kn02ba_errintr(void)
     64 {
     65 	paddr_t err, adr;
     66 	size_t siz;
     67 	uint32_t mer;
     68 	static unsigned int errintr_cnt = 0;
     69 
     70 	siz = *(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(KMIN_REG_MSR);
     71 	mer = *(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(KMIN_REG_MER);
     72 	adr = *(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(KMIN_REG_AER);
     73 
     74 	/* clear interrupt bit */
     75 	*(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(KMIN_REG_TIMEOUT) = 0;
     76 
     77 	err = 0;	/* XXX gcc */
     78 	switch (mer & KMIN_MER_LASTBYTE) {
     79 	case KMIN_LASTB31:
     80 		err = 3; break;
     81 	case KMIN_LASTB23:
     82 		err = 2; break;
     83 	case KMIN_LASTB15:
     84 		err = 1; break;
     85 	case KMIN_LASTB07:
     86 		err = 0; break;
     87 	}
     88 	err |= (adr & KMIN_AER_ADDR_MASK);
     89 
     90 	errintr_cnt++;
     91 	printf("(%u)Bad memory chip at phys %#"PRIxPADDR
     92 	    " [%x %zx %#"PRIxPADDR"]\n",
     93 	    errintr_cnt, err, mer, siz, adr);
     94 }
     95