1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/* $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 <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/obio.h>
#include <machine/pte.h>
#include <sun3/dev/memerr.h>
/* #include <sun3/dev/eccreg.h> - 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... */
}
|
