/* $NetBSD: memerr.c,v 1.6 1996/11/13 07:05:14 thorpej Exp $ */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Lawrence Berkeley Laboratory. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. * * @(#)memreg.c 8.1 (Berkeley) 6/11/93 */ #include #include #include #include #include #include #include #include /* #include - not yet */ #define ME_PRI 7 /* Interrupt level (NMI) */ extern unsigned char cpu_machine_id; enum memerr_type { ME_PAR = 0, ME_ECC = 1 }; struct memerr_softc { struct device sc_dev; struct memerr *sc_reg; enum memerr_type sc_type; char *sc_typename; /* "Parity" or "ECC" */ char *sc_csrbits; /* how to print csr bits */ /* XXX: counters? */ }; static int memerr_match __P((struct device *, void *vcf, void *args)); static void memerr_attach __P((struct device *, struct device *, void *)); static int memerr_interrupt __P((void *)); static void memerr_correctable __P((struct memerr_softc *)); struct cfattach memerr_ca = { sizeof(struct memerr_softc), memerr_match, memerr_attach }; struct cfdriver memerr_cd = { NULL, "memerr", DV_DULL }; static int memerr_match(parent, vcf, args) struct device *parent; void *vcf, *args; { struct cfdata *cf = vcf; struct confargs *ca = args; /* This driver only supports one unit. */ if (cf->cf_unit != 0) return (0); /* The peek returns -1 on bus error. */ if (bus_peek(ca->ca_bustype, ca->ca_paddr, 1) == -1) return (0); /* Default interrupt priority. */ if (ca->ca_intpri == -1) ca->ca_intpri = ME_PRI; return (1); } static void memerr_attach(parent, self, args) struct device *parent; struct device *self; void *args; { struct memerr_softc *sc = (void *)self; struct confargs *ca = args; struct memerr *mer; /* * Which type of memory subsystem do we have? */ switch (cpu_machine_id) { case SUN3_MACH_160: /* XXX: correct? */ case SUN3_MACH_260: sc->sc_type = ME_ECC; sc->sc_typename = "ECC"; sc->sc_csrbits = ME_ECC_STR; break; default: sc->sc_type = ME_PAR; sc->sc_typename = "Parity"; sc->sc_csrbits = ME_PAR_STR; break; } printf(": (%s memory)\n", sc->sc_typename); mer = (struct memerr *) obio_alloc(ca->ca_paddr, sizeof(*mer)); if (mer == NULL) panic("memerr: can not map register"); sc->sc_reg = mer; /* Install interrupt handler. */ isr_add_autovect(memerr_interrupt, (void *)sc, ca->ca_intpri); /* Enable error interrupt (and checking). */ if (sc->sc_type == ME_PAR) mer->me_csr = ME_CSR_IENA | ME_PAR_CHECK; else { /* * XXX: Some day, figure out how to decode * correctable errors and set ME_ECC_CE_ENA * here so we can log them... */ mer->me_csr = ME_CSR_IENA; /* | ME_ECC_CE_ENA */ } } /***************************************************************** * Functions for ECC memory *****************************************************************/ static int memerr_interrupt(arg) void *arg; { struct memerr_softc *sc = arg; volatile struct memerr *me = sc->sc_reg; u_char csr, ctx, err; u_int pa, va; int pte; csr = me->me_csr; if ((csr & ME_CSR_IPEND) == 0) return (0); va = me->me_vaddr; ctx = (va >> 28) & 0xF; va &= 0x0FFFffff; pte = get_pte(va); pa = PG_PA(pte); printf("\nMemory error on %s cycle!\n", (ctx & 8) ? "DVMA" : "CPU"); printf(" ctx=%d, vaddr=0x%x, paddr=0x%x\n", (ctx & 7), va, pa); printf(" csr=%x\n", csr); /* * If we have parity-checked memory, there is * not much to be done. Any error is fatal. */ if (sc->sc_type == ME_PAR) { if (csr & ME_PAR_EMASK) /* Parity errors are fatal. */ goto die; /* The IPEND bit was set, but no error bits. */ goto noerror; } /* * We have ECC memory. More complicated... */ if (csr & (ME_ECC_WBTMO | ME_ECC_WBERR)) { printf(" write-back failed, pte=0x%x\n", pte); goto die; } if (csr & ME_ECC_UE) { printf(" uncorrectable ECC error\n"); goto die; } if (csr & ME_ECC_CE) { /* Just log this and continue. */ memerr_correctable(sc); goto recover; } /* The IPEND bit was set, but no error bits. */ goto noerror; die: panic("all bets are off..."); noerror: printf("memerr: no error bits set?\n"); recover: /* Clear the error by writing the address register. */ me->me_vaddr = 0; return (1); } /* * Announce (and log) a correctable ECC error. * Need to look at the ECC syndrome register on * the memory board that caused the error... */ void memerr_correctable(sc) struct memerr_softc *sc; { /* XXX: Not yet... */ }