aboutsummaryrefslogtreecommitdiff
path: root/arch/alpha/kernel/err_common.c
blob: 94e1b3dcf6d430d0db2635f02d8ccea6af39d3cc (plain)
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
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
// SPDX-License-Identifier: GPL-2.0
/*
 *	linux/arch/alpha/kernel/err_common.c
 *
 *	Copyright (C) 2000 Jeff Wiedemeier (Compaq Computer Corporation)
 *
 *	Error handling code supporting Alpha systems
 */

#include <linux/init.h>
#include <linux/sched.h>

#include <asm/io.h>
#include <asm/hwrpb.h>
#include <asm/smp.h>
#include <asm/err_common.h>

#include "err_impl.h"
#include "proto.h"

/*
 * err_print_prefix -- error handling print routines should prefix
 * all prints with this
 */
char *err_print_prefix = KERN_NOTICE;


/*
 * Generic
 */
void
mchk_dump_mem(void *data, size_t length, char **annotation)
{
	unsigned long *ldata = data;
	size_t i;
	
	for (i = 0; (i * sizeof(*ldata)) < length; i++) {
		if (annotation && !annotation[i]) 
			annotation = NULL;
		printk("%s    %08x: %016lx    %s\n",
		       err_print_prefix,
		       (unsigned)(i * sizeof(*ldata)), ldata[i],
		       annotation ? annotation[i] : "");
	}
}

void
mchk_dump_logout_frame(struct el_common *mchk_header)
{
	printk("%s  -- Frame Header --\n"
	         "    Frame Size:   %d (0x%x) bytes\n"
	         "    Flags:        %s%s\n"
	         "    MCHK Code:    0x%x\n"
	         "    Frame Rev:    %d\n"
	         "    Proc Offset:  0x%08x\n"
	         "    Sys Offset:   0x%08x\n"
  	         "  -- Processor Region --\n",
	       err_print_prefix, 
	       mchk_header->size, mchk_header->size,
	       mchk_header->retry ? "RETRY " : "", 
  	         mchk_header->err2 ? "SECOND_ERR " : "",
	       mchk_header->code,
	       mchk_header->frame_rev,
	       mchk_header->proc_offset,
	       mchk_header->sys_offset);

	mchk_dump_mem((void *)
		      ((unsigned long)mchk_header + mchk_header->proc_offset),
		      mchk_header->sys_offset - mchk_header->proc_offset,
		      NULL);
	
	printk("%s  -- System Region --\n", err_print_prefix);
	mchk_dump_mem((void *)
		      ((unsigned long)mchk_header + mchk_header->sys_offset),
		      mchk_header->size - mchk_header->sys_offset,
		      NULL);
	printk("%s  -- End of Frame --\n", err_print_prefix);
}


/*
 * Console Data Log
 */
/* Data */
static struct el_subpacket_handler *subpacket_handler_list = NULL;
static struct el_subpacket_annotation *subpacket_annotation_list = NULL;

static struct el_subpacket *
el_process_header_subpacket(struct el_subpacket *header)
{
	union el_timestamp timestamp;
	char *name = "UNKNOWN EVENT";
	int packet_count = 0;
	int length = 0;

	if (header->class != EL_CLASS__HEADER) {
		printk("%s** Unexpected header CLASS %d TYPE %d, aborting\n",
		       err_print_prefix,
		       header->class, header->type);
		return NULL;
	}

	switch(header->type) {
	case EL_TYPE__HEADER__SYSTEM_ERROR_FRAME:
		name = "SYSTEM ERROR";
		length = header->by_type.sys_err.frame_length;
		packet_count = 
			header->by_type.sys_err.frame_packet_count;
		timestamp.as_int = 0;
		break;
	case EL_TYPE__HEADER__SYSTEM_EVENT_FRAME:
		name = "SYSTEM EVENT";
		length = header->by_type.sys_event.frame_length;
		packet_count = 
			header->by_type.sys_event.frame_packet_count;
		timestamp = header->by_type.sys_event.timestamp;
		break;
	case EL_TYPE__HEADER__HALT_FRAME:
		name = "ERROR HALT";
		length = header->by_type.err_halt.frame_length;
		packet_count = 
			header->by_type.err_halt.frame_packet_count;
		timestamp = header->by_type.err_halt.timestamp;
		break;
	case EL_TYPE__HEADER__LOGOUT_FRAME:
		name = "LOGOUT FRAME";
		length = header->by_type.logout_header.frame_length;
		packet_count = 1;
		timestamp.as_int = 0;
		break;
	default: /* Unknown */
		printk("%s** Unknown header - CLASS %d TYPE %d, aborting\n",
		       err_print_prefix,
		       header->class, header->type);
		return NULL;		
	}

	printk("%s*** %s:\n"
	         "  CLASS %d, TYPE %d\n", 
	       err_print_prefix,
	       name,
	       header->class, header->type);
	el_print_timestamp(&timestamp);
	
	/*
	 * Process the subpackets
	 */
	el_process_subpackets(header, packet_count);

	/* return the next header */
	header = (struct el_subpacket *)
		((unsigned long)header + header->length + length);
	return header;
}

static struct el_subpacket *
el_process_subpacket_reg(struct el_subpacket *header)
{
	struct el_subpacket *next = NULL;
	struct el_subpacket_handler *h = subpacket_handler_list;

	for (; h && h->class != header->class; h = h->next);
	if (h) next = h->handler(header);

	return next;
}

void
el_print_timestamp(union el_timestamp *timestamp)
{
	if (timestamp->as_int)
		printk("%s  TIMESTAMP: %d/%d/%02d %d:%02d:%0d\n", 
		       err_print_prefix,
		       timestamp->b.month, timestamp->b.day,
		       timestamp->b.year, timestamp->b.hour,
		       timestamp->b.minute, timestamp->b.second);
}

void
el_process_subpackets(struct el_subpacket *header, int packet_count)
{
	struct el_subpacket *subpacket;
	int i;

	subpacket = (struct el_subpacket *)
		((unsigned long)header + header->length);

	for (i = 0; subpacket && i < packet_count; i++) {
		printk("%sPROCESSING SUBPACKET %d\n", err_print_prefix, i);
		subpacket = el_process_subpacket(subpacket);
	}
}

struct el_subpacket *
el_process_subpacket(struct el_subpacket *header)
{
	struct el_subpacket *next = NULL;

	switch(header->class) {
	case EL_CLASS__TERMINATION:
		/* Termination packet, there are no more */
		break;
	case EL_CLASS__HEADER: 
		next = el_process_header_subpacket(header);
		break;
	default:
		if (NULL == (next = el_process_subpacket_reg(header))) {
			printk("%s** Unexpected header CLASS %d TYPE %d"
			       " -- aborting.\n",
			       err_print_prefix,
			       header->class, header->type);
		}
		break;
	}

	return next;
}

void 
el_annotate_subpacket(struct el_subpacket *header)
{
	struct el_subpacket_annotation *a;
	char **annotation = NULL;

	for (a = subpacket_annotation_list; a; a = a->next) {
		if (a->class == header->class &&
		    a->type == header->type &&
		    a->revision == header->revision) {
			/*
			 * We found the annotation
			 */
			annotation = a->annotation;
			printk("%s  %s\n", err_print_prefix, a->description);
			break;
		}
	}

	mchk_dump_mem(header, header->length, annotation);
}

static void __init
cdl_process_console_data_log(int cpu, struct percpu_struct *pcpu)
{
	struct el_subpacket *header = (struct el_subpacket *)
		(IDENT_ADDR | pcpu->console_data_log_pa);
	int err;

	printk("%s******* CONSOLE DATA LOG FOR CPU %d. *******\n"
	         "*** Error(s) were logged on a previous boot\n",
	       err_print_prefix, cpu);
	
	for (err = 0; header && (header->class != EL_CLASS__TERMINATION); err++)
		header = el_process_subpacket(header);

	/* let the console know it's ok to clear the error(s) at restart */
	pcpu->console_data_log_pa = 0;

	printk("%s*** %d total error(s) logged\n"
	         "**** END OF CONSOLE DATA LOG FOR CPU %d ****\n", 
	       err_print_prefix, err, cpu);
}

void __init
cdl_check_console_data_log(void)
{
	struct percpu_struct *pcpu;
	unsigned long cpu;

	for (cpu = 0; cpu < hwrpb->nr_processors; cpu++) {
		pcpu = (struct percpu_struct *)
			((unsigned long)hwrpb + hwrpb->processor_offset 
			 + cpu * hwrpb->processor_size);
		if (pcpu->console_data_log_pa)
			cdl_process_console_data_log(cpu, pcpu);
	}

}

int __init
cdl_register_subpacket_annotation(struct el_subpacket_annotation *new)
{
	struct el_subpacket_annotation *a = subpacket_annotation_list;

	if (a == NULL) subpacket_annotation_list = new;
	else {
		for (; a->next != NULL; a = a->next) {
			if ((a->class == new->class && a->type == new->type) ||
			    a == new) {
				printk("Attempted to re-register "
				       "subpacket annotation\n");
				return -EINVAL;
			}
		}
		a->next = new;
	}
	new->next = NULL;

	return 0;
}

int __init
cdl_register_subpacket_handler(struct el_subpacket_handler *new)
{
	struct el_subpacket_handler *h = subpacket_handler_list;

	if (h == NULL) subpacket_handler_list = new;
	else {
		for (; h->next != NULL; h = h->next) {
			if (h->class == new->class || h == new) {
				printk("Attempted to re-register "
				       "subpacket handler\n");
				return -EINVAL;
			}
		}
		h->next = new;
	}
	new->next = NULL;

	return 0;
}