release/src-rt-6.x.4708/linux/linux-2.6.36/arch/alpha/kernel/err_common.c

   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 \f
  27 /*
  28  * Generic
  29  */
  30 void
  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
  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 \f
  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 *
  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(&timestamp);
 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 *
 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
 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
 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 *
 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
 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
 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
 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
 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
 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 }