1 /* $NetBSD: memerr.c,v 1.11 2001/05/27 06:30:27 chs 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/cpu.h> 53 #include <machine/idprom.h> 54 #include <machine/pte.h> 55 56 #include <sun3/sun3/machdep.h> 57 #include <sun3/dev/memerr.h> 58 /* #include <sun3/dev/eccreg.h> - not yet */ 59 60 #define ME_PRI 7 /* Interrupt level (NMI) */ 61 62 extern unsigned char cpu_machine_id; 63 64 enum memerr_type { ME_PAR = 0, ME_ECC = 1 }; 65 66 struct memerr_softc { 67 struct device sc_dev; 68 struct memerr *sc_reg; 69 enum memerr_type sc_type; 70 char *sc_typename; /* "Parity" or "ECC" */ 71 char *sc_csrbits; /* how to print csr bits */ 72 /* XXX: counters? */ 73 }; 74 75 static int memerr_match __P((struct device *, struct cfdata *, void *)); 76 static void memerr_attach __P((struct device *, struct device *, void *)); 77 static int memerr_interrupt __P((void *)); 78 static void memerr_correctable __P((struct memerr_softc *)); 79 80 struct cfattach memerr_ca = { 81 sizeof(struct memerr_softc), memerr_match, memerr_attach 82 }; 83 84 int memerr_attached; 85 86 static int 87 memerr_match(parent, cf, args) 88 struct device *parent; 89 struct cfdata *cf; 90 void *args; 91 { 92 struct confargs *ca = args; 93 94 /* This driver only supports one instance. */ 95 if (memerr_attached) 96 return (0); 97 98 /* Make sure there is something there... */ 99 if (bus_peek(ca->ca_bustype, ca->ca_paddr, 1) == -1) 100 return (0); 101 102 /* Default interrupt priority. */ 103 if (ca->ca_intpri == -1) 104 ca->ca_intpri = ME_PRI; 105 106 return (1); 107 } 108 109 static void 110 memerr_attach(parent, self, args) 111 struct device *parent; 112 struct device *self; 113 void *args; 114 { 115 struct memerr_softc *sc = (void *)self; 116 struct confargs *ca = args; 117 struct memerr *mer; 118 119 /* 120 * Which type of memory subsystem do we have? 121 */ 122 switch (cpu_machine_id) { 123 case SUN3_MACH_160: /* XXX: correct? */ 124 case SUN3_MACH_260: 125 case SUN3X_MACH_470: 126 sc->sc_type = ME_ECC; 127 sc->sc_typename = "ECC"; 128 sc->sc_csrbits = ME_ECC_STR; 129 break; 130 131 default: 132 sc->sc_type = ME_PAR; 133 sc->sc_typename = "Parity"; 134 sc->sc_csrbits = ME_PAR_STR; 135 break; 136 } 137 printf(": (%s memory)\n", sc->sc_typename); 138 139 mer = bus_mapin(ca->ca_bustype, ca->ca_paddr, sizeof(*mer)); 140 if (mer == NULL) 141 panic("memerr: can not map register"); 142 sc->sc_reg = mer; 143 144 /* Install interrupt handler. */ 145 isr_add_autovect(memerr_interrupt, sc, ca->ca_intpri); 146 147 /* Enable error interrupt (and checking). */ 148 if (sc->sc_type == ME_PAR) 149 mer->me_csr = ME_CSR_IENA | ME_PAR_CHECK; 150 else { 151 /* 152 * XXX: Some day, figure out how to decode 153 * correctable errors and set ME_ECC_CE_ENA 154 * here so we can log them... 155 */ 156 mer->me_csr = ME_CSR_IENA; /* | ME_ECC_CE_ENA */ 157 } 158 memerr_attached = 1; 159 } 160 161 /***************************************************************** 162 * Functions for ECC memory 163 *****************************************************************/ 164 165 static int 166 memerr_interrupt(arg) 167 void *arg; 168 { 169 struct memerr_softc *sc = arg; 170 volatile struct memerr *me = sc->sc_reg; 171 u_char csr, ctx; 172 u_int pa, va; 173 int pte; 174 char bits[64]; 175 176 csr = me->me_csr; 177 if ((csr & ME_CSR_IPEND) == 0) 178 return (0); 179 180 va = me->me_vaddr; 181 ctx = (va >> 28) & 0xF; 182 va &= 0x0FFFffff; 183 pte = get_pte(va); 184 pa = PG_PA(pte); 185 186 printf("\nMemory error on %s cycle!\n", 187 (ctx & 8) ? "DVMA" : "CPU"); 188 printf(" ctx=%d, vaddr=0x%x, paddr=0x%x\n", 189 (ctx & 7), va, pa); 190 printf(" csr=%s\n", bitmask_snprintf(csr, sc->sc_csrbits, 191 bits, sizeof(bits))); 192 193 /* 194 * If we have parity-checked memory, there is 195 * not much to be done. Any error is fatal. 196 */ 197 if (sc->sc_type == ME_PAR) { 198 if (csr & ME_PAR_EMASK) { 199 /* Parity errors are fatal. */ 200 goto die; 201 } 202 /* The IPEND bit was set, but no error bits. */ 203 goto noerror; 204 } 205 206 /* 207 * We have ECC memory. More complicated... 208 */ 209 if (csr & (ME_ECC_WBTMO | ME_ECC_WBERR)) { 210 printf(" write-back failed, pte=0x%x\n", pte); 211 goto die; 212 } 213 if (csr & ME_ECC_UE) { 214 printf(" uncorrectable ECC error\n"); 215 goto die; 216 } 217 if (csr & ME_ECC_CE) { 218 /* Just log this and continue. */ 219 memerr_correctable(sc); 220 goto recover; 221 } 222 /* The IPEND bit was set, but no error bits. */ 223 goto noerror; 224 225 die: 226 panic("all bets are off..."); 227 228 noerror: 229 printf("memerr: no error bits set?\n"); 230 231 recover: 232 /* Clear the error by writing the address register. */ 233 me->me_vaddr = 0; 234 return (1); 235 } 236 237 /* 238 * Announce (and log) a correctable ECC error. 239 * Need to look at the ECC syndrome register on 240 * the memory board that caused the error... 241 */ 242 void 243 memerr_correctable(sc) 244 struct memerr_softc *sc; 245 { 246 /* XXX: Not yet... */ 247 } 248