1 /*
2 * linux/arch/alpha/kernel/err_common.c
3 *
4 * Copyright (C) 2000 Jeff Wiedemeier (Compaq Computer Corporation)
5 *
6 * Error handling code supporting Alpha systems
7 */
8
9 #include <linux/init.h>
10 #include <linux/sched.h>
11
12 #include <asm/io.h>
13 #include <asm/hwrpb.h>
14 #include <asm/smp.h>
15 #include <asm/err_common.h>
16
17 #include "err_impl.h"
18 #include "proto.h"
19
20 /*
21 * err_print_prefix -- error handling print routines should prefix
22 * all prints with this
23 */
24 char *err_print_prefix = KERN_NOTICE;
25
26
27 /*
28 * Generic
29 */
30 void
mchk_dump_mem(void * data,size_t length,char ** annotation)31 mchk_dump_mem(void *data, size_t length, char **annotation)
32 {
33 unsigned long *ldata = data;
34 size_t i;
35
36 for (i = 0; (i * sizeof(*ldata)) < length; i++) {
37 if (annotation && !annotation[i])
38 annotation = NULL;
39 printk("%s %08x: %016lx %s\n",
40 err_print_prefix,
41 (unsigned)(i * sizeof(*ldata)), ldata[i],
42 annotation ? annotation[i] : "");
43 }
44 }
45
46 void
mchk_dump_logout_frame(struct el_common * mchk_header)47 mchk_dump_logout_frame(struct el_common *mchk_header)
48 {
49 printk("%s -- Frame Header --\n"
50 " Frame Size: %d (0x%x) bytes\n"
51 " Flags: %s%s\n"
52 " MCHK Code: 0x%x\n"
53 " Frame Rev: %d\n"
54 " Proc Offset: 0x%08x\n"
55 " Sys Offset: 0x%08x\n"
56 " -- Processor Region --\n",
57 err_print_prefix,
58 mchk_header->size, mchk_header->size,
59 mchk_header->retry ? "RETRY " : "",
60 mchk_header->err2 ? "SECOND_ERR " : "",
61 mchk_header->code,
62 mchk_header->frame_rev,
63 mchk_header->proc_offset,
64 mchk_header->sys_offset);
65
66 mchk_dump_mem((void *)
67 ((unsigned long)mchk_header + mchk_header->proc_offset),
68 mchk_header->sys_offset - mchk_header->proc_offset,
69 NULL);
70
71 printk("%s -- System Region --\n", err_print_prefix);
72 mchk_dump_mem((void *)
73 ((unsigned long)mchk_header + mchk_header->sys_offset),
74 mchk_header->size - mchk_header->sys_offset,
75 NULL);
76 printk("%s -- End of Frame --\n", err_print_prefix);
77 }
78
79
80 /*
81 * Console Data Log
82 */
83 /* Data */
84 static struct el_subpacket_handler *subpacket_handler_list = NULL;
85 static struct el_subpacket_annotation *subpacket_annotation_list = NULL;
86
87 static struct el_subpacket *
el_process_header_subpacket(struct el_subpacket * header)88 el_process_header_subpacket(struct el_subpacket *header)
89 {
90 union el_timestamp timestamp;
91 char *name = "UNKNOWN EVENT";
92 int packet_count = 0;
93 int length = 0;
94
95 if (header->class != EL_CLASS__HEADER) {
96 printk("%s** Unexpected header CLASS %d TYPE %d, aborting\n",
97 err_print_prefix,
98 header->class, header->type);
99 return NULL;
100 }
101
102 switch(header->type) {
103 case EL_TYPE__HEADER__SYSTEM_ERROR_FRAME:
104 name = "SYSTEM ERROR";
105 length = header->by_type.sys_err.frame_length;
106 packet_count =
107 header->by_type.sys_err.frame_packet_count;
108 timestamp.as_int = 0;
109 break;
110 case EL_TYPE__HEADER__SYSTEM_EVENT_FRAME:
111 name = "SYSTEM EVENT";
112 length = header->by_type.sys_event.frame_length;
113 packet_count =
114 header->by_type.sys_event.frame_packet_count;
115 timestamp = header->by_type.sys_event.timestamp;
116 break;
117 case EL_TYPE__HEADER__HALT_FRAME:
118 name = "ERROR HALT";
119 length = header->by_type.err_halt.frame_length;
120 packet_count =
121 header->by_type.err_halt.frame_packet_count;
122 timestamp = header->by_type.err_halt.timestamp;
123 break;
124 case EL_TYPE__HEADER__LOGOUT_FRAME:
125 name = "LOGOUT FRAME";
126 length = header->by_type.logout_header.frame_length;
127 packet_count = 1;
128 timestamp.as_int = 0;
129 break;
130 default: /* Unknown */
131 printk("%s** Unknown header - CLASS %d TYPE %d, aborting\n",
132 err_print_prefix,
133 header->class, header->type);
134 return NULL;
135 }
136
137 printk("%s*** %s:\n"
138 " CLASS %d, TYPE %d\n",
139 err_print_prefix,
140 name,
141 header->class, header->type);
142 el_print_timestamp(×tamp);
143
144 /*
145 * Process the subpackets
146 */
147 el_process_subpackets(header, packet_count);
148
149 /* return the next header */
150 header = (struct el_subpacket *)
151 ((unsigned long)header + header->length + length);
152 return header;
153 }
154
155 static struct el_subpacket *
el_process_subpacket_reg(struct el_subpacket * header)156 el_process_subpacket_reg(struct el_subpacket *header)
157 {
158 struct el_subpacket *next = NULL;
159 struct el_subpacket_handler *h = subpacket_handler_list;
160
161 for (; h && h->class != header->class; h = h->next);
162 if (h) next = h->handler(header);
163
164 return next;
165 }
166
167 void
el_print_timestamp(union el_timestamp * timestamp)168 el_print_timestamp(union el_timestamp *timestamp)
169 {
170 if (timestamp->as_int)
171 printk("%s TIMESTAMP: %d/%d/%02d %d:%02d:%0d\n",
172 err_print_prefix,
173 timestamp->b.month, timestamp->b.day,
174 timestamp->b.year, timestamp->b.hour,
175 timestamp->b.minute, timestamp->b.second);
176 }
177
178 void
el_process_subpackets(struct el_subpacket * header,int packet_count)179 el_process_subpackets(struct el_subpacket *header, int packet_count)
180 {
181 struct el_subpacket *subpacket;
182 int i;
183
184 subpacket = (struct el_subpacket *)
185 ((unsigned long)header + header->length);
186
187 for (i = 0; subpacket && i < packet_count; i++) {
188 printk("%sPROCESSING SUBPACKET %d\n", err_print_prefix, i);
189 subpacket = el_process_subpacket(subpacket);
190 }
191 }
192
193 struct el_subpacket *
el_process_subpacket(struct el_subpacket * header)194 el_process_subpacket(struct el_subpacket *header)
195 {
196 struct el_subpacket *next = NULL;
197
198 switch(header->class) {
199 case EL_CLASS__TERMINATION:
200 /* Termination packet, there are no more */
201 break;
202 case EL_CLASS__HEADER:
203 next = el_process_header_subpacket(header);
204 break;
205 default:
206 if (NULL == (next = el_process_subpacket_reg(header))) {
207 printk("%s** Unexpected header CLASS %d TYPE %d"
208 " -- aborting.\n",
209 err_print_prefix,
210 header->class, header->type);
211 }
212 break;
213 }
214
215 return next;
216 }
217
218 void
el_annotate_subpacket(struct el_subpacket * header)219 el_annotate_subpacket(struct el_subpacket *header)
220 {
221 struct el_subpacket_annotation *a;
222 char **annotation = NULL;
223
224 for (a = subpacket_annotation_list; a; a = a->next) {
225 if (a->class == header->class &&
226 a->type == header->type &&
227 a->revision == header->revision) {
228 /*
229 * We found the annotation
230 */
231 annotation = a->annotation;
232 printk("%s %s\n", err_print_prefix, a->description);
233 break;
234 }
235 }
236
237 mchk_dump_mem(header, header->length, annotation);
238 }
239
240 static void __init
cdl_process_console_data_log(int cpu,struct percpu_struct * pcpu)241 cdl_process_console_data_log(int cpu, struct percpu_struct *pcpu)
242 {
243 struct el_subpacket *header = (struct el_subpacket *)
244 (IDENT_ADDR | pcpu->console_data_log_pa);
245 int err;
246
247 printk("%s******* CONSOLE DATA LOG FOR CPU %d. *******\n"
248 "*** Error(s) were logged on a previous boot\n",
249 err_print_prefix, cpu);
250
251 for (err = 0; header && (header->class != EL_CLASS__TERMINATION); err++)
252 header = el_process_subpacket(header);
253
254 /* let the console know it's ok to clear the error(s) at restart */
255 pcpu->console_data_log_pa = 0;
256
257 printk("%s*** %d total error(s) logged\n"
258 "**** END OF CONSOLE DATA LOG FOR CPU %d ****\n",
259 err_print_prefix, err, cpu);
260 }
261
262 void __init
cdl_check_console_data_log(void)263 cdl_check_console_data_log(void)
264 {
265 struct percpu_struct *pcpu;
266 unsigned long cpu;
267
268 for (cpu = 0; cpu < hwrpb->nr_processors; cpu++) {
269 pcpu = (struct percpu_struct *)
270 ((unsigned long)hwrpb + hwrpb->processor_offset
271 + cpu * hwrpb->processor_size);
272 if (pcpu->console_data_log_pa)
273 cdl_process_console_data_log(cpu, pcpu);
274 }
275
276 }
277
278 int __init
cdl_register_subpacket_annotation(struct el_subpacket_annotation * new)279 cdl_register_subpacket_annotation(struct el_subpacket_annotation *new)
280 {
281 struct el_subpacket_annotation *a = subpacket_annotation_list;
282
283 if (a == NULL) subpacket_annotation_list = new;
284 else {
285 for (; a->next != NULL; a = a->next) {
286 if ((a->class == new->class && a->type == new->type) ||
287 a == new) {
288 printk("Attempted to re-register "
289 "subpacket annotation\n");
290 return -EINVAL;
291 }
292 }
293 a->next = new;
294 }
295 new->next = NULL;
296
297 return 0;
298 }
299
300 int __init
cdl_register_subpacket_handler(struct el_subpacket_handler * new)301 cdl_register_subpacket_handler(struct el_subpacket_handler *new)
302 {
303 struct el_subpacket_handler *h = subpacket_handler_list;
304
305 if (h == NULL) subpacket_handler_list = new;
306 else {
307 for (; h->next != NULL; h = h->next) {
308 if (h->class == new->class || h == new) {
309 printk("Attempted to re-register "
310 "subpacket handler\n");
311 return -EINVAL;
312 }
313 }
314 h->next = new;
315 }
316 new->next = NULL;
317
318 return 0;
319 }
320
321