memerr.c revision 1.7
1 /* $NetBSD: memerr.c,v 1.7 1996/12/17 21:10:50 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 /* The peek returns -1 on bus error. */ 103 if (bus_peek(ca->ca_bustype, ca->ca_paddr, 1) == -1) 104 return (0); 105 106 /* Default interrupt priority. */ 107 if (ca->ca_intpri == -1) 108 ca->ca_intpri = ME_PRI; 109 110 return (1); 111 } 112 113 static void 114 memerr_attach(parent, self, args) 115 struct device *parent; 116 struct device *self; 117 void *args; 118 { 119 struct memerr_softc *sc = (void *)self; 120 struct confargs *ca = args; 121 struct memerr *mer; 122 123 /* 124 * Which type of memory subsystem do we have? 125 */ 126 switch (cpu_machine_id) { 127 case SUN3_MACH_160: /* XXX: correct? */ 128 case SUN3_MACH_260: 129 sc->sc_type = ME_ECC; 130 sc->sc_typename = "ECC"; 131 sc->sc_csrbits = ME_ECC_STR; 132 break; 133 134 default: 135 sc->sc_type = ME_PAR; 136 sc->sc_typename = "Parity"; 137 sc->sc_csrbits = ME_PAR_STR; 138 break; 139 } 140 printf(": (%s memory)\n", sc->sc_typename); 141 142 mer = (struct memerr *) 143 obio_alloc(ca->ca_paddr, sizeof(*mer)); 144 if (mer == NULL) 145 panic("memerr: can not map register"); 146 sc->sc_reg = mer; 147 148 /* Install interrupt handler. */ 149 isr_add_autovect(memerr_interrupt, 150 (void *)sc, ca->ca_intpri); 151 152 /* Enable error interrupt (and checking). */ 153 if (sc->sc_type == ME_PAR) 154 mer->me_csr = ME_CSR_IENA | ME_PAR_CHECK; 155 else { 156 /* 157 * XXX: Some day, figure out how to decode 158 * correctable errors and set ME_ECC_CE_ENA 159 * here so we can log them... 160 */ 161 mer->me_csr = ME_CSR_IENA; /* | ME_ECC_CE_ENA */ 162 } 163 } 164 165 /***************************************************************** 166 * Functions for ECC memory 167 *****************************************************************/ 168 169 static int 170 memerr_interrupt(arg) 171 void *arg; 172 { 173 struct memerr_softc *sc = arg; 174 volatile struct memerr *me = sc->sc_reg; 175 u_char csr, ctx; 176 u_int pa, va; 177 int pte; 178 char bits[64]; 179 180 csr = me->me_csr; 181 if ((csr & ME_CSR_IPEND) == 0) 182 return (0); 183 184 va = me->me_vaddr; 185 ctx = (va >> 28) & 0xF; 186 va &= 0x0FFFffff; 187 pte = get_pte(va); 188 pa = PG_PA(pte); 189 190 printf("\nMemory error on %s cycle!\n", 191 (ctx & 8) ? "DVMA" : "CPU"); 192 printf(" ctx=%d, vaddr=0x%x, paddr=0x%x\n", 193 (ctx & 7), va, pa); 194 printf(" csr=%s\n", bitmask_snprintf(csr, sc->sc_csrbits, 195 bits, sizeof(bits))); 196 197 /* 198 * If we have parity-checked memory, there is 199 * not much to be done. Any error is fatal. 200 */ 201 if (sc->sc_type == ME_PAR) { 202 if (csr & ME_PAR_EMASK) { 203 /* Parity errors are fatal. */ 204 goto die; 205 } 206 /* The IPEND bit was set, but no error bits. */ 207 goto noerror; 208 } 209 210 /* 211 * We have ECC memory. More complicated... 212 */ 213 if (csr & (ME_ECC_WBTMO | ME_ECC_WBERR)) { 214 printf(" write-back failed, pte=0x%x\n", pte); 215 goto die; 216 } 217 if (csr & ME_ECC_UE) { 218 printf(" uncorrectable ECC error\n"); 219 goto die; 220 } 221 if (csr & ME_ECC_CE) { 222 /* Just log this and continue. */ 223 memerr_correctable(sc); 224 goto recover; 225 } 226 /* The IPEND bit was set, but no error bits. */ 227 goto noerror; 228 229 die: 230 panic("all bets are off..."); 231 232 noerror: 233 printf("memerr: no error bits set?\n"); 234 235 recover: 236 /* Clear the error by writing the address register. */ 237 me->me_vaddr = 0; 238 return (1); 239 } 240 241 /* 242 * Announce (and log) a correctable ECC error. 243 * Need to look at the ECC syndrome register on 244 * the memory board that caused the error... 245 */ 246 void 247 memerr_correctable(sc) 248 struct memerr_softc *sc; 249 { 250 /* XXX: Not yet... */ 251 } 252
Indexes created Thu Sep 25 15:09:46 GMT 2025