memerr.c revision 1.9
1 /* $NetBSD: memerr.c,v 1.9 1998/01/12 20:32:22 thorpej 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 static int 86 memerr_match(parent, cf, args) 87 struct device *parent; 88 struct cfdata *cf; 89 void *args; 90 { 91 struct confargs *ca = args; 92 93 /* This driver only supports one unit. */ 94 if (cf->cf_unit != 0) 95 return (0); 96 97 /* We use obio_mapin(), so require OBIO. */ 98 if (ca->ca_bustype != BUS_OBIO) 99 return (0); 100 101 /* Make sure there is something there... */ 102 if (bus_peek(ca->ca_bustype, ca->ca_paddr, 1) == -1) 103 return (0); 104 105 /* Default interrupt priority. */ 106 if (ca->ca_intpri == -1) 107 ca->ca_intpri = ME_PRI; 108 109 return (1); 110 } 111 112 static void 113 memerr_attach(parent, self, args) 114 struct device *parent; 115 struct device *self; 116 void *args; 117 { 118 struct memerr_softc *sc = (void *)self; 119 struct confargs *ca = args; 120 struct memerr *mer; 121 122 /* 123 * Which type of memory subsystem do we have? 124 */ 125 switch (cpu_machine_id) { 126 case SUN3_MACH_160: /* XXX: correct? */ 127 case SUN3_MACH_260: 128 sc->sc_type = ME_ECC; 129 sc->sc_typename = "ECC"; 130 sc->sc_csrbits = ME_ECC_STR; 131 break; 132 133 default: 134 sc->sc_type = ME_PAR; 135 sc->sc_typename = "Parity"; 136 sc->sc_csrbits = ME_PAR_STR; 137 break; 138 } 139 printf(": (%s memory)\n", sc->sc_typename); 140 141 mer = (struct memerr *) 142 obio_mapin(ca->ca_paddr, sizeof(*mer)); 143 if (mer == NULL) 144 panic("memerr: can not map register"); 145 sc->sc_reg = mer; 146 147 /* Install interrupt handler. */ 148 isr_add_autovect(memerr_interrupt, 149 (void *)sc, ca->ca_intpri); 150 151 /* Enable error interrupt (and checking). */ 152 if (sc->sc_type == ME_PAR) 153 mer->me_csr = ME_CSR_IENA | ME_PAR_CHECK; 154 else { 155 /* 156 * XXX: Some day, figure out how to decode 157 * correctable errors and set ME_ECC_CE_ENA 158 * here so we can log them... 159 */ 160 mer->me_csr = ME_CSR_IENA; /* | ME_ECC_CE_ENA */ 161 } 162 } 163 164 /***************************************************************** 165 * Functions for ECC memory 166 *****************************************************************/ 167 168 static int 169 memerr_interrupt(arg) 170 void *arg; 171 { 172 struct memerr_softc *sc = arg; 173 volatile struct memerr *me = sc->sc_reg; 174 u_char csr, ctx; 175 u_int pa, va; 176 int pte; 177 char bits[64]; 178 179 csr = me->me_csr; 180 if ((csr & ME_CSR_IPEND) == 0) 181 return (0); 182 183 va = me->me_vaddr; 184 ctx = (va >> 28) & 0xF; 185 va &= 0x0FFFffff; 186 pte = get_pte(va); 187 pa = PG_PA(pte); 188 189 printf("\nMemory error on %s cycle!\n", 190 (ctx & 8) ? "DVMA" : "CPU"); 191 printf(" ctx=%d, vaddr=0x%x, paddr=0x%x\n", 192 (ctx & 7), va, pa); 193 printf(" csr=%s\n", bitmask_snprintf(csr, sc->sc_csrbits, 194 bits, sizeof(bits))); 195 196 /* 197 * If we have parity-checked memory, there is 198 * not much to be done. Any error is fatal. 199 */ 200 if (sc->sc_type == ME_PAR) { 201 if (csr & ME_PAR_EMASK) { 202 /* Parity errors are fatal. */ 203 goto die; 204 } 205 /* The IPEND bit was set, but no error bits. */ 206 goto noerror; 207 } 208 209 /* 210 * We have ECC memory. More complicated... 211 */ 212 if (csr & (ME_ECC_WBTMO | ME_ECC_WBERR)) { 213 printf(" write-back failed, pte=0x%x\n", pte); 214 goto die; 215 } 216 if (csr & ME_ECC_UE) { 217 printf(" uncorrectable ECC error\n"); 218 goto die; 219 } 220 if (csr & ME_ECC_CE) { 221 /* Just log this and continue. */ 222 memerr_correctable(sc); 223 goto recover; 224 } 225 /* The IPEND bit was set, but no error bits. */ 226 goto noerror; 227 228 die: 229 panic("all bets are off..."); 230 231 noerror: 232 printf("memerr: no error bits set?\n"); 233 234 recover: 235 /* Clear the error by writing the address register. */ 236 me->me_vaddr = 0; 237 return (1); 238 } 239 240 /* 241 * Announce (and log) a correctable ECC error. 242 * Need to look at the ECC syndrome register on 243 * the memory board that caused the error... 244 */ 245 void 246 memerr_correctable(sc) 247 struct memerr_softc *sc; 248 { 249 /* XXX: Not yet... */ 250 } 251
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