memerr.c revision 1.8
1 /* $NetBSD: memerr.c,v 1.8 1997/04/28 21:59:22 gwr Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)memreg.c 8.1 (Berkeley) 6/11/93 45 */ 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/device.h> 50 51 #include <machine/autoconf.h> 52 #include <machine/control.h> 53 #include <machine/cpu.h> 54 #include <machine/idprom.h> 55 #include <machine/obio.h> 56 #include <machine/pte.h> 57 58 #include <sun3/dev/memerr.h> 59 /* #include <sun3/dev/eccreg.h> - not yet */ 60 61 #define ME_PRI 7 /* Interrupt level (NMI) */ 62 63 extern unsigned char cpu_machine_id; 64 65 enum memerr_type { ME_PAR = 0, ME_ECC = 1 }; 66 67 struct memerr_softc { 68 struct device sc_dev; 69 struct memerr *sc_reg; 70 enum memerr_type sc_type; 71 char *sc_typename; /* "Parity" or "ECC" */ 72 char *sc_csrbits; /* how to print csr bits */ 73 /* XXX: counters? */ 74 }; 75 76 static int memerr_match __P((struct device *, struct cfdata *, void *)); 77 static void memerr_attach __P((struct device *, struct device *, void *)); 78 static int memerr_interrupt __P((void *)); 79 static void memerr_correctable __P((struct memerr_softc *)); 80 81 struct cfattach memerr_ca = { 82 sizeof(struct memerr_softc), memerr_match, memerr_attach 83 }; 84 85 struct cfdriver memerr_cd = { 86 NULL, "memerr", DV_DULL 87 }; 88 89 90 static int 91 memerr_match(parent, cf, args) 92 struct device *parent; 93 struct cfdata *cf; 94 void *args; 95 { 96 struct confargs *ca = args; 97 98 /* This driver only supports one unit. */ 99 if (cf->cf_unit != 0) 100 return (0); 101 102 /* We use obio_mapin(), so require OBIO. */ 103 if (ca->ca_bustype != BUS_OBIO) 104 return (0); 105 106 /* Make sure there is something there... */ 107 if (bus_peek(ca->ca_bustype, ca->ca_paddr, 1) == -1) 108 return (0); 109 110 /* Default interrupt priority. */ 111 if (ca->ca_intpri == -1) 112 ca->ca_intpri = ME_PRI; 113 114 return (1); 115 } 116 117 static void 118 memerr_attach(parent, self, args) 119 struct device *parent; 120 struct device *self; 121 void *args; 122 { 123 struct memerr_softc *sc = (void *)self; 124 struct confargs *ca = args; 125 struct memerr *mer; 126 127 /* 128 * Which type of memory subsystem do we have? 129 */ 130 switch (cpu_machine_id) { 131 case SUN3_MACH_160: /* XXX: correct? */ 132 case SUN3_MACH_260: 133 sc->sc_type = ME_ECC; 134 sc->sc_typename = "ECC"; 135 sc->sc_csrbits = ME_ECC_STR; 136 break; 137 138 default: 139 sc->sc_type = ME_PAR; 140 sc->sc_typename = "Parity"; 141 sc->sc_csrbits = ME_PAR_STR; 142 break; 143 } 144 printf(": (%s memory)\n", sc->sc_typename); 145 146 mer = (struct memerr *) 147 obio_mapin(ca->ca_paddr, sizeof(*mer)); 148 if (mer == NULL) 149 panic("memerr: can not map register"); 150 sc->sc_reg = mer; 151 152 /* Install interrupt handler. */ 153 isr_add_autovect(memerr_interrupt, 154 (void *)sc, ca->ca_intpri); 155 156 /* Enable error interrupt (and checking). */ 157 if (sc->sc_type == ME_PAR) 158 mer->me_csr = ME_CSR_IENA | ME_PAR_CHECK; 159 else { 160 /* 161 * XXX: Some day, figure out how to decode 162 * correctable errors and set ME_ECC_CE_ENA 163 * here so we can log them... 164 */ 165 mer->me_csr = ME_CSR_IENA; /* | ME_ECC_CE_ENA */ 166 } 167 } 168 169 /***************************************************************** 170 * Functions for ECC memory 171 *****************************************************************/ 172 173 static int 174 memerr_interrupt(arg) 175 void *arg; 176 { 177 struct memerr_softc *sc = arg; 178 volatile struct memerr *me = sc->sc_reg; 179 u_char csr, ctx; 180 u_int pa, va; 181 int pte; 182 char bits[64]; 183 184 csr = me->me_csr; 185 if ((csr & ME_CSR_IPEND) == 0) 186 return (0); 187 188 va = me->me_vaddr; 189 ctx = (va >> 28) & 0xF; 190 va &= 0x0FFFffff; 191 pte = get_pte(va); 192 pa = PG_PA(pte); 193 194 printf("\nMemory error on %s cycle!\n", 195 (ctx & 8) ? "DVMA" : "CPU"); 196 printf(" ctx=%d, vaddr=0x%x, paddr=0x%x\n", 197 (ctx & 7), va, pa); 198 printf(" csr=%s\n", bitmask_snprintf(csr, sc->sc_csrbits, 199 bits, sizeof(bits))); 200 201 /* 202 * If we have parity-checked memory, there is 203 * not much to be done. Any error is fatal. 204 */ 205 if (sc->sc_type == ME_PAR) { 206 if (csr & ME_PAR_EMASK) { 207 /* Parity errors are fatal. */ 208 goto die; 209 } 210 /* The IPEND bit was set, but no error bits. */ 211 goto noerror; 212 } 213 214 /* 215 * We have ECC memory. More complicated... 216 */ 217 if (csr & (ME_ECC_WBTMO | ME_ECC_WBERR)) { 218 printf(" write-back failed, pte=0x%x\n", pte); 219 goto die; 220 } 221 if (csr & ME_ECC_UE) { 222 printf(" uncorrectable ECC error\n"); 223 goto die; 224 } 225 if (csr & ME_ECC_CE) { 226 /* Just log this and continue. */ 227 memerr_correctable(sc); 228 goto recover; 229 } 230 /* The IPEND bit was set, but no error bits. */ 231 goto noerror; 232 233 die: 234 panic("all bets are off..."); 235 236 noerror: 237 printf("memerr: no error bits set?\n"); 238 239 recover: 240 /* Clear the error by writing the address register. */ 241 me->me_vaddr = 0; 242 return (1); 243 } 244 245 /* 246 * Announce (and log) a correctable ECC error. 247 * Need to look at the ECC syndrome register on 248 * the memory board that caused the error... 249 */ 250 void 251 memerr_correctable(sc) 252 struct memerr_softc *sc; 253 { 254 /* XXX: Not yet... */ 255 } 256
Indexes created Wed Sep 24 05:09:52 GMT 2025