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   1 /*
   2  * File:         arch/blackfin/kernel/traps.c
   3  * Based on:
   4  * Author:       Hamish Macdonald
   5  *
   6  * Created:
   7  * Description:  uses S/W interrupt 15 for the system calls
   8  *
   9  * Modified:
  10  *               Copyright 2004-2006 Analog Devices Inc.
  11  *
  12  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, see the file COPYING, or write
  26  * to the Free Software Foundation, Inc.,
  27  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  28  */
  29
  30 #include <linux/uaccess.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/module.h>
  33 #include <linux/kallsyms.h>
  34 #include <linux/fs.h>
  35 #include <asm/traps.h>
  36 #include <asm/cacheflush.h>
  37 #include <asm/blackfin.h>
  38 #include <asm/irq_handler.h>
  39 #include <linux/irq.h>
  40 #include <asm/trace.h>
  41 #include <asm/fixed_code.h>
  42 #include <asm/dma.h>
  43
  44 #ifdef CONFIG_KGDB
  45 # include <linux/debugger.h>
  46 # include <linux/kgdb.h>
  47
  48 # define CHK_DEBUGGER_TRAP() \
  49         do { \
  50                 CHK_DEBUGGER(trapnr, sig, info.si_code, fp, ); \
  51         } while (0)
  52 # define CHK_DEBUGGER_TRAP_MAYBE() \
  53         do { \
  54                 if (kgdb_connected) \
  55                         CHK_DEBUGGER_TRAP(); \
  56         } while (0)
  57 #else
  58 # define CHK_DEBUGGER_TRAP() do { } while (0)
  59 # define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0)
  60 #endif
  61
  62 /* Initiate the event table handler */
  63 void __init trap_init(void)
  64 {
  65         CSYNC();
  66         bfin_write_EVT3(trap);
  67         CSYNC();
  68 }
  69
  70 unsigned long saved_icplb_fault_addr, saved_dcplb_fault_addr;
  71
  72 static void decode_address(char *buf, unsigned long address)
  73 {
  74         struct vm_list_struct *vml;
  75         struct task_struct *p;
  76         struct mm_struct *mm;
  77         unsigned long flags, offset;
  78         unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
  79
  80 #ifdef CONFIG_KALLSYMS
  81         unsigned long symsize;
  82         const char *symname;
  83         char *modname;
  84         char *delim = ":";
  85         char namebuf[128];
  86
  87         /* look up the address and see if we are in kernel space */
  88         symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
  89
  90         if (symname) {
  91                 /* yeah! kernel space! */
  92                 if (!modname)
  93                         modname = delim = "";
  94                 sprintf(buf, "<0x%p> { %s%s%s%s + 0x%lx }",
  95                               (void *)address, delim, modname, delim, symname,
  96                               (unsigned long)offset);
  97                 return;
  98
  99         }
 100 #endif
 101
 102         /* Problem in fixed code section? */
 103         if (address >= FIXED_CODE_START && address < FIXED_CODE_END) {
 104                 sprintf(buf, "<0x%p> /* Maybe fixed code section */", (void *)address);
 105                 return;
 106         }
 107
 108         /* Problem somewhere before the kernel start address */
 109         if (address < CONFIG_BOOT_LOAD) {
 110                 sprintf(buf, "<0x%p> /* Maybe null pointer? */", (void *)address);
 111                 return;
 112         }
 113
 114         /* looks like we're off in user-land, so let's walk all the
 115          * mappings of all our processes and see if we can't be a whee
 116          * bit more specific
 117          */
 118         write_lock_irqsave(&tasklist_lock, flags);
 119         for_each_process(p) {
 120                 mm = (in_atomic ? p->mm : get_task_mm(p));
 121                 if (!mm)
 122                         continue;
 123
 124                 vml = mm->context.vmlist;
 125                 while (vml) {
 126                         struct vm_area_struct *vma = vml->vma;
 127
 128                         if (address >= vma->vm_start && address < vma->vm_end) {
 129                                 char _tmpbuf[256];
 130                                 char *name = p->comm;
 131                                 struct file *file = vma->vm_file;
 132
 133                                 if (file)
 134                                         name = d_path(&file->f_path, _tmpbuf,
 135                                                       sizeof(_tmpbuf));
 136
 137                                 /* FLAT does not have its text aligned to the start of
 138                                  * the map while FDPIC ELF does ...
 139                                  */
 140
 141                                 /* before we can check flat/fdpic, we need to
 142                                  * make sure current is valid
 143                                  */
 144                                 if ((unsigned long)current >= FIXED_CODE_START &&
 145                                     !((unsigned long)current & 0x3)) {
 146                                         if (current->mm &&
 147                                             (address > current->mm->start_code) &&
 148                                             (address < current->mm->end_code))
 149                                                 offset = address - current->mm->start_code;
 150                                         else
 151                                                 offset = (address - vma->vm_start) +
 152                                                          (vma->vm_pgoff << PAGE_SHIFT);
 153
 154                                         sprintf(buf, "<0x%p> [ %s + 0x%lx ]",
 155                                                 (void *)address, name, offset);
 156                                 } else
 157                                         sprintf(buf, "<0x%p> [ %s vma:0x%lx-0x%lx]",
 158                                                 (void *)address, name,
 159                                                 vma->vm_start, vma->vm_end);
 160
 161                                 if (!in_atomic)
 162                                         mmput(mm);
 163
 164                                 if (!strlen(buf))
 165                                         sprintf(buf, "<0x%p> [ %s ] dynamic memory", (void *)address, name);
 166
 167                                 goto done;
 168                         }
 169
 170                         vml = vml->next;
 171                 }
 172                 if (!in_atomic)
 173                         mmput(mm);
 174         }
 175
 176         /* we were unable to find this address anywhere */
 177         sprintf(buf, "<0x%p> /* kernel dynamic memory */", (void *)address);
 178
 179 done:
 180         write_unlock_irqrestore(&tasklist_lock, flags);
 181 }
 182
 183 asmlinkage void double_fault_c(struct pt_regs *fp)
 184 {
 185         console_verbose();
 186         oops_in_progress = 1;
 187         printk(KERN_EMERG "\n" KERN_EMERG "Double Fault\n");
 188         dump_bfin_process(fp);
 189         dump_bfin_mem(fp);
 190         show_regs(fp);
 191         panic("Double Fault - unrecoverable event\n");
 192
 193 }
 194
 195 asmlinkage void trap_c(struct pt_regs *fp)
 196 {
 197 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
 198         int j;
 199 #endif
 200         int sig = 0;
 201         siginfo_t info;
 202         unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
 203
 204         trace_buffer_save(j);
 205
 206         /* Important - be very careful dereferncing pointers - will lead to
 207          * double faults if the stack has become corrupt
 208          */
 209
 210         /* If the fault was caused by a kernel thread, or interrupt handler
 211          * we will kernel panic, so the system reboots.
 212          * If KGDB is enabled, don't set this for kernel breakpoints
 213         */
 214
 215         /* TODO: check to see if we are in some sort of deferred HWERR
 216          * that we should be able to recover from, not kernel panic
 217          */
 218         if ((bfin_read_IPEND() & 0xFFC0) && (trapnr != VEC_STEP)
 219 #ifdef CONFIG_KGDB
 220                 && (trapnr != VEC_EXCPT02)
 221 #endif
 222         ){
 223                 console_verbose();
 224                 oops_in_progress = 1;
 225         } else if (current) {
 226                 if (current->mm == NULL) {
 227                         console_verbose();
 228                         oops_in_progress = 1;
 229                 }
 230         }
 231
 232         /* trap_c() will be called for exceptions. During exceptions
 233          * processing, the pc value should be set with retx value.
 234          * With this change we can cleanup some code in signal.c- TODO
 235          */
 236         fp->orig_pc = fp->retx;
 237         /* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n",
 238                 trapnr, fp->ipend, fp->pc, fp->retx); */
 239
 240         /* send the appropriate signal to the user program */
 241         switch (trapnr) {
 242
 243         /* This table works in conjuction with the one in ./mach-common/entry.S
 244          * Some exceptions are handled there (in assembly, in exception space)
 245          * Some are handled here, (in C, in interrupt space)
 246          * Some, like CPLB, are handled in both, where the normal path is
 247          * handled in assembly/exception space, and the error path is handled
 248          * here
 249          */
 250
 251         /* 0x00 - Linux Syscall, getting here is an error */
 252         /* 0x01 - userspace gdb breakpoint, handled here */
 253         case VEC_EXCPT01:
 254                 info.si_code = TRAP_ILLTRAP;
 255                 sig = SIGTRAP;
 256                 CHK_DEBUGGER_TRAP_MAYBE();
 257                 /* Check if this is a breakpoint in kernel space */
 258                 if (fp->ipend & 0xffc0)
 259                         return;
 260                 else
 261                         break;
 262 #ifdef CONFIG_KGDB
 263         case VEC_EXCPT02 :               /* gdb connection */
 264                 info.si_code = TRAP_ILLTRAP;
 265                 sig = SIGTRAP;
 266                 CHK_DEBUGGER_TRAP();
 267                 return;
 268 #else
 269         /* 0x02 - User Defined, Caught by default */
 270 #endif
 271         /* 0x03 - User Defined, userspace stack overflow */
 272         case VEC_EXCPT03:
 273                 info.si_code = SEGV_STACKFLOW;
 274                 sig = SIGSEGV;
 275                 printk(KERN_NOTICE EXC_0x03(KERN_NOTICE));
 276                 CHK_DEBUGGER_TRAP();
 277                 break;
 278         /* 0x04 - User Defined, Caught by default */
 279         /* 0x05 - User Defined, Caught by default */
 280         /* 0x06 - User Defined, Caught by default */
 281         /* 0x07 - User Defined, Caught by default */
 282         /* 0x08 - User Defined, Caught by default */
 283         /* 0x09 - User Defined, Caught by default */
 284         /* 0x0A - User Defined, Caught by default */
 285         /* 0x0B - User Defined, Caught by default */
 286         /* 0x0C - User Defined, Caught by default */
 287         /* 0x0D - User Defined, Caught by default */
 288         /* 0x0E - User Defined, Caught by default */
 289         /* 0x0F - User Defined, Caught by default */
 290         /* 0x10 HW Single step, handled here */
 291         case VEC_STEP:
 292                 info.si_code = TRAP_STEP;
 293                 sig = SIGTRAP;
 294                 CHK_DEBUGGER_TRAP_MAYBE();
 295                 /* Check if this is a single step in kernel space */
 296                 if (fp->ipend & 0xffc0)
 297                         return;
 298                 else
 299                         break;
 300         /* 0x11 - Trace Buffer Full, handled here */
 301         case VEC_OVFLOW:
 302                 info.si_code = TRAP_TRACEFLOW;
 303                 sig = SIGTRAP;
 304                 printk(KERN_NOTICE EXC_0x11(KERN_NOTICE));
 305                 CHK_DEBUGGER_TRAP();
 306                 break;
 307         /* 0x12 - Reserved, Caught by default */
 308         /* 0x13 - Reserved, Caught by default */
 309         /* 0x14 - Reserved, Caught by default */
 310         /* 0x15 - Reserved, Caught by default */
 311         /* 0x16 - Reserved, Caught by default */
 312         /* 0x17 - Reserved, Caught by default */
 313         /* 0x18 - Reserved, Caught by default */
 314         /* 0x19 - Reserved, Caught by default */
 315         /* 0x1A - Reserved, Caught by default */
 316         /* 0x1B - Reserved, Caught by default */
 317         /* 0x1C - Reserved, Caught by default */
 318         /* 0x1D - Reserved, Caught by default */
 319         /* 0x1E - Reserved, Caught by default */
 320         /* 0x1F - Reserved, Caught by default */
 321         /* 0x20 - Reserved, Caught by default */
 322         /* 0x21 - Undefined Instruction, handled here */
 323         case VEC_UNDEF_I:
 324                 info.si_code = ILL_ILLOPC;
 325                 sig = SIGILL;
 326                 printk(KERN_NOTICE EXC_0x21(KERN_NOTICE));
 327                 CHK_DEBUGGER_TRAP();
 328                 break;
 329         /* 0x22 - Illegal Instruction Combination, handled here */
 330         case VEC_ILGAL_I:
 331                 info.si_code = ILL_ILLPARAOP;
 332                 sig = SIGILL;
 333                 printk(KERN_NOTICE EXC_0x22(KERN_NOTICE));
 334                 CHK_DEBUGGER_TRAP();
 335                 break;
 336         /* 0x23 - Data CPLB protection violation, handled here */
 337         case VEC_CPLB_VL:
 338                 info.si_code = ILL_CPLB_VI;
 339                 sig = SIGBUS;
 340                 printk(KERN_NOTICE EXC_0x23(KERN_NOTICE));
 341                 CHK_DEBUGGER_TRAP();
 342                 break;
 343         /* 0x24 - Data access misaligned, handled here */
 344         case VEC_MISALI_D:
 345                 info.si_code = BUS_ADRALN;
 346                 sig = SIGBUS;
 347                 printk(KERN_NOTICE EXC_0x24(KERN_NOTICE));
 348                 CHK_DEBUGGER_TRAP();
 349                 break;
 350         /* 0x25 - Unrecoverable Event, handled here */
 351         case VEC_UNCOV:
 352                 info.si_code = ILL_ILLEXCPT;
 353                 sig = SIGILL;
 354                 printk(KERN_NOTICE EXC_0x25(KERN_NOTICE));
 355                 CHK_DEBUGGER_TRAP();
 356                 break;
 357         /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr,
 358                 error case is handled here */
 359         case VEC_CPLB_M:
 360                 info.si_code = BUS_ADRALN;
 361                 sig = SIGBUS;
 362                 printk(KERN_NOTICE EXC_0x26(KERN_NOTICE));
 363                 CHK_DEBUGGER_TRAP();
 364                 break;
 365         /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
 366         case VEC_CPLB_MHIT:
 367                 info.si_code = ILL_CPLB_MULHIT;
 368                 sig = SIGSEGV;
 369 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
 370                 if (saved_dcplb_fault_addr < FIXED_CODE_START)
 371                         printk(KERN_NOTICE "NULL pointer access\n");
 372                 else
 373 #endif
 374                         printk(KERN_NOTICE EXC_0x27(KERN_NOTICE));
 375                 CHK_DEBUGGER_TRAP();
 376                 break;
 377         /* 0x28 - Emulation Watchpoint, handled here */
 378         case VEC_WATCH:
 379                 info.si_code = TRAP_WATCHPT;
 380                 sig = SIGTRAP;
 381                 pr_debug(EXC_0x28(KERN_DEBUG));
 382                 CHK_DEBUGGER_TRAP_MAYBE();
 383                 /* Check if this is a watchpoint in kernel space */
 384                 if (fp->ipend & 0xffc0)
 385                         return;
 386                 else
 387                         break;
 388 #ifdef CONFIG_BF535
 389         /* 0x29 - Instruction fetch access error (535 only) */
 390         case VEC_ISTRU_VL:      /* ADSP-BF535 only (MH) */
 391                 info.si_code = BUS_OPFETCH;
 392                 sig = SIGBUS;
 393                 printk(KERN_NOTICE "BF535: VEC_ISTRU_VL\n");
 394                 CHK_DEBUGGER_TRAP();
 395                 break;
 396 #else
 397         /* 0x29 - Reserved, Caught by default */
 398 #endif
 399         /* 0x2A - Instruction fetch misaligned, handled here */
 400         case VEC_MISALI_I:
 401                 info.si_code = BUS_ADRALN;
 402                 sig = SIGBUS;
 403                 printk(KERN_NOTICE EXC_0x2A(KERN_NOTICE));
 404                 CHK_DEBUGGER_TRAP();
 405                 break;
 406         /* 0x2B - Instruction CPLB protection violation, handled here */
 407         case VEC_CPLB_I_VL:
 408                 info.si_code = ILL_CPLB_VI;
 409                 sig = SIGBUS;
 410                 printk(KERN_NOTICE EXC_0x2B(KERN_NOTICE));
 411                 CHK_DEBUGGER_TRAP();
 412                 break;
 413         /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */
 414         case VEC_CPLB_I_M:
 415                 info.si_code = ILL_CPLB_MISS;
 416                 sig = SIGBUS;
 417                 printk(KERN_NOTICE EXC_0x2C(KERN_NOTICE));
 418                 CHK_DEBUGGER_TRAP();
 419                 break;
 420         /* 0x2D - Instruction CPLB Multiple Hits, handled here */
 421         case VEC_CPLB_I_MHIT:
 422                 info.si_code = ILL_CPLB_MULHIT;
 423                 sig = SIGSEGV;
 424 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
 425                 if (saved_icplb_fault_addr < FIXED_CODE_START)
 426                         printk(KERN_NOTICE "Jump to NULL address\n");
 427                 else
 428 #endif
 429                         printk(KERN_NOTICE EXC_0x2D(KERN_NOTICE));
 430                 CHK_DEBUGGER_TRAP();
 431                 break;
 432         /* 0x2E - Illegal use of Supervisor Resource, handled here */
 433         case VEC_ILL_RES:
 434                 info.si_code = ILL_PRVOPC;
 435                 sig = SIGILL;
 436                 printk(KERN_NOTICE EXC_0x2E(KERN_NOTICE));
 437                 CHK_DEBUGGER_TRAP();
 438                 break;
 439         /* 0x2F - Reserved, Caught by default */
 440         /* 0x30 - Reserved, Caught by default */
 441         /* 0x31 - Reserved, Caught by default */
 442         /* 0x32 - Reserved, Caught by default */
 443         /* 0x33 - Reserved, Caught by default */
 444         /* 0x34 - Reserved, Caught by default */
 445         /* 0x35 - Reserved, Caught by default */
 446         /* 0x36 - Reserved, Caught by default */
 447         /* 0x37 - Reserved, Caught by default */
 448         /* 0x38 - Reserved, Caught by default */
 449         /* 0x39 - Reserved, Caught by default */
 450         /* 0x3A - Reserved, Caught by default */
 451         /* 0x3B - Reserved, Caught by default */
 452         /* 0x3C - Reserved, Caught by default */
 453         /* 0x3D - Reserved, Caught by default */
 454         /* 0x3E - Reserved, Caught by default */
 455         /* 0x3F - Reserved, Caught by default */
 456         case VEC_HWERR:
 457                 info.si_code = BUS_ADRALN;
 458                 sig = SIGBUS;
 459                 switch (fp->seqstat & SEQSTAT_HWERRCAUSE) {
 460                 /* System MMR Error */
 461                 case (SEQSTAT_HWERRCAUSE_SYSTEM_MMR):
 462                         info.si_code = BUS_ADRALN;
 463                         sig = SIGBUS;
 464                         printk(KERN_NOTICE HWC_x2(KERN_NOTICE));
 465                         break;
 466                 /* External Memory Addressing Error */
 467                 case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR):
 468                         info.si_code = BUS_ADRERR;
 469                         sig = SIGBUS;
 470                         printk(KERN_NOTICE HWC_x3(KERN_NOTICE));
 471                         break;
 472                 /* Performance Monitor Overflow */
 473                 case (SEQSTAT_HWERRCAUSE_PERF_FLOW):
 474                         printk(KERN_NOTICE HWC_x12(KERN_NOTICE));
 475                         break;
 476                 /* RAISE 5 instruction */
 477                 case (SEQSTAT_HWERRCAUSE_RAISE_5):
 478                         printk(KERN_NOTICE HWC_x18(KERN_NOTICE));
 479                         break;
 480                 default:        /* Reserved */
 481                         printk(KERN_NOTICE HWC_default(KERN_NOTICE));
 482                         break;
 483                 }
 484                 CHK_DEBUGGER_TRAP();
 485                 break;
 486         default:
 487                 info.si_code = TRAP_ILLTRAP;
 488                 sig = SIGTRAP;
 489                 printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n",
 490                         (fp->seqstat & SEQSTAT_EXCAUSE));
 491                 CHK_DEBUGGER_TRAP();
 492                 break;
 493         }
 494
 495         BUG_ON(sig == 0);
 496
 497         if (sig != SIGTRAP) {
 498                 unsigned long *stack;
 499                 dump_bfin_process(fp);
 500                 dump_bfin_mem(fp);
 501                 show_regs(fp);
 502
 503                 /* Print out the trace buffer if it makes sense */
 504 #ifndef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
 505                 if (trapnr == VEC_CPLB_I_M || trapnr == VEC_CPLB_M)
 506                         printk(KERN_NOTICE "No trace since you do not have "
 507                                 "CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n"
 508                                 KERN_NOTICE "\n");
 509                 else
 510 #endif
 511                         dump_bfin_trace_buffer();
 512
 513                 if (oops_in_progress) {
 514                         /* Dump the current kernel stack */
 515                         printk(KERN_NOTICE "\n" KERN_NOTICE "Kernel Stack\n");
 516                         show_stack(current, NULL);
 517
 518                         print_modules();
 519 #ifndef CONFIG_ACCESS_CHECK
 520                         printk(KERN_EMERG "Please turn on "
 521                                "CONFIG_ACCESS_CHECK\n");
 522 #endif
 523                         panic("Kernel exception");
 524                 } else {
 525                         /* Dump the user space stack */
 526                         stack = (unsigned long *)rdusp();
 527                         printk(KERN_NOTICE "Userspace Stack\n");
 528                         show_stack(NULL, stack);
 529                 }
 530         }
 531
 532         info.si_signo = sig;
 533         info.si_errno = 0;
 534         info.si_addr = (void __user *)fp->pc;
 535         force_sig_info(sig, &info, current);
 536
 537         trace_buffer_restore(j);
 538         return;
 539 }
 540
 541 /* Typical exception handling routines  */
 542
 543 #define EXPAND_LEN ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 256 - 1)
 544
 545 /*
 546  * Similar to get_user, do some address checking, then dereference
 547  * Return true on sucess, false on bad address
 548  */
 549 bool get_instruction(unsigned short *val, unsigned short *address)
 550 {
 551
 552         unsigned long addr;
 553
 554         addr = (unsigned long)address;
 555
 556         /* Check for odd addresses */
 557         if (addr & 0x1)
 558                 return false;
 559
 560         /* Check that things do not wrap around */
 561         if (addr > (addr + 2))
 562                 return false;
 563
 564         /*
 565          * Since we are in exception context, we need to do a little address checking
 566          * We need to make sure we are only accessing valid memory, and
 567          * we don't read something in the async space that can hang forever
 568          */
 569         if ((addr >= FIXED_CODE_START && (addr + 2) <= physical_mem_end) ||
 570 #ifdef L2_START
 571             (addr >= L2_START && (addr + 2) <= (L2_START + L2_LENGTH)) ||
 572 #endif
 573             (addr >= BOOT_ROM_START && (addr + 2) <= (BOOT_ROM_START + BOOT_ROM_LENGTH)) ||
 574 #if L1_DATA_A_LENGTH != 0
 575             (addr >= L1_DATA_A_START && (addr + 2) <= (L1_DATA_A_START + L1_DATA_A_LENGTH)) ||
 576 #endif
 577 #if L1_DATA_B_LENGTH != 0
 578             (addr >= L1_DATA_B_START && (addr + 2) <= (L1_DATA_B_START + L1_DATA_B_LENGTH)) ||
 579 #endif
 580             (addr >= L1_SCRATCH_START && (addr + 2) <= (L1_SCRATCH_START + L1_SCRATCH_LENGTH)) ||
 581             (!(bfin_read_EBIU_AMBCTL0() & B0RDYEN) &&
 582                addr >= ASYNC_BANK0_BASE && (addr + 2) <= (ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE)) ||
 583             (!(bfin_read_EBIU_AMBCTL0() & B1RDYEN) &&
 584                addr >= ASYNC_BANK1_BASE && (addr + 2) <= (ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE)) ||
 585             (!(bfin_read_EBIU_AMBCTL1() & B2RDYEN) &&
 586                addr >= ASYNC_BANK2_BASE && (addr + 2) <= (ASYNC_BANK2_BASE + ASYNC_BANK1_SIZE)) ||
 587             (!(bfin_read_EBIU_AMBCTL1() & B3RDYEN) &&
 588               addr >= ASYNC_BANK3_BASE && (addr + 2) <= (ASYNC_BANK3_BASE + ASYNC_BANK1_SIZE))) {
 589                 *val = *address;
 590                 return true;
 591         }
 592
 593 #if L1_CODE_LENGTH != 0
 594         if (addr >= L1_CODE_START && (addr + 2) <= (L1_CODE_START + L1_CODE_LENGTH)) {
 595                 dma_memcpy(val, address, 2);
 596                 return true;
 597         }
 598 #endif
 599
 600
 601         return false;
 602 }
 603
 604 void dump_bfin_trace_buffer(void)
 605 {
 606 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
 607         int tflags, i = 0;
 608         char buf[150];
 609         unsigned short val = 0, *addr;
 610 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
 611         int j, index;
 612 #endif
 613
 614         trace_buffer_save(tflags);
 615
 616         printk(KERN_NOTICE "Hardware Trace:\n");
 617
 618         if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
 619                 for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
 620                         decode_address(buf, (unsigned long)bfin_read_TBUF());
 621                         printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
 622                         addr = (unsigned short *)bfin_read_TBUF();
 623                         decode_address(buf, (unsigned long)addr);
 624                         printk(KERN_NOTICE "     Source : %s ", buf);
 625                         if (get_instruction(&val, addr)) {
 626                                 if (val == 0x0010)
 627                                         printk("RTS");
 628                                 else if (val == 0x0011)
 629                                         printk("RTI");
 630                                 else if (val == 0x0012)
 631                                         printk("RTX");
 632                                 else if (val >= 0x0050 && val <= 0x0057)
 633                                         printk("JUMP (P%i)", val & 7);
 634                                 else if (val >= 0x0060 && val <= 0x0067)
 635                                         printk("CALL (P%i)", val & 7);
 636                                 else if (val >= 0x0070 && val <= 0x0077)
 637                                         printk("CALL (PC+P%i)", val & 7);
 638                                 else if (val >= 0x0080 && val <= 0x0087)
 639                                         printk("JUMP (PC+P%i)", val & 7);
 640                                 else if ((val >= 0x1000 && val <= 0x13FF) ||
 641                                     (val >= 0x1800 && val <= 0x1BFF))
 642                                         printk("IF !CC JUMP");
 643                                 else if ((val >= 0x1400 && val <= 0x17ff) ||
 644                                     (val >= 0x1c00 && val <= 0x1fff))
 645                                         printk("IF CC JUMP");
 646                                 else if (val >= 0x2000 && val <= 0x2fff)
 647                                         printk("JUMP.S");
 648                                 else if (val >= 0xe080 && val <= 0xe0ff)
 649                                         printk("LSETUP");
 650                                 else if (val >= 0xe200 && val <= 0xe2ff)
 651                                         printk("JUMP.L");
 652                                 else if (val >= 0xe300 && val <= 0xe3ff)
 653                                         printk("CALL pcrel");
 654                                 else
 655                                         printk("0x%04x", val);
 656                         }
 657                         printk("\n");
 658                 }
 659         }
 660
 661 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
 662         if (trace_buff_offset)
 663                 index = trace_buff_offset/4 - 1;
 664         else
 665                 index = EXPAND_LEN;
 666
 667         j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128;
 668         while (j) {
 669                 decode_address(buf, software_trace_buff[index]);
 670                 printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
 671                 index -= 1;
 672                 if (index < 0 )
 673                         index = EXPAND_LEN;
 674                 decode_address(buf, software_trace_buff[index]);
 675                 printk(KERN_NOTICE "     Source : %s\n", buf);
 676                 index -= 1;
 677                 if (index < 0)
 678                         index = EXPAND_LEN;
 679                 j--;
 680                 i++;
 681         }
 682 #endif
 683
 684         trace_buffer_restore(tflags);
 685 #endif
 686 }
 687 EXPORT_SYMBOL(dump_bfin_trace_buffer);
 688
 689 /*
 690  * Checks to see if the address pointed to is either a
 691  * 16-bit CALL instruction, or a 32-bit CALL instruction
 692  */
 693 bool is_bfin_call(unsigned short *addr)
 694 {
 695         unsigned short opcode = 0, *ins_addr;
 696         ins_addr = (unsigned short *)addr;
 697
 698         if (!get_instruction(&opcode, ins_addr))
 699                 return false;
 700
 701         if ((opcode >= 0x0060 && opcode <= 0x0067) ||
 702             (opcode >= 0x0070 && opcode <= 0x0077))
 703                 return true;
 704
 705         ins_addr--;
 706         if (!get_instruction(&opcode, ins_addr))
 707                 return false;
 708
 709         if (opcode >= 0xE300 && opcode <= 0xE3FF)
 710                 return true;
 711
 712         return false;
 713
 714 }
 715 void show_stack(struct task_struct *task, unsigned long *stack)
 716 {
 717         unsigned int *addr, *endstack, *fp = 0, *frame;
 718         unsigned short *ins_addr;
 719         char buf[150];
 720         unsigned int i, j, ret_addr, frame_no = 0;
 721
 722         /*
 723          * If we have been passed a specific stack, use that one otherwise
 724          *    if we have been passed a task structure, use that, otherwise
 725          *    use the stack of where the variable "stack" exists
 726          */
 727
 728         if (stack == NULL) {
 729                 if (task) {
 730                         /* We know this is a kernel stack, so this is the start/end */
 731                         stack = (unsigned long *)task->thread.ksp;
 732                         endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE);
 733                 } else {
 734                         /* print out the existing stack info */
 735                         stack = (unsigned long *)&stack;
 736                         endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
 737                 }
 738         } else
 739                 endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
 740
 741         decode_address(buf, (unsigned int)stack);
 742         printk(KERN_NOTICE "Stack info:\n" KERN_NOTICE " SP: [0x%p] %s\n", stack, buf);
 743         addr = (unsigned int *)((unsigned int)stack & ~0x3F);
 744
 745         /* First thing is to look for a frame pointer */
 746         for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
 747                 addr < endstack; addr++, i++) {
 748                 if (*addr & 0x1)
 749                         continue;
 750                 ins_addr = (unsigned short *)*addr;
 751                 ins_addr--;
 752                 if (is_bfin_call(ins_addr))
 753                         fp = addr - 1;
 754
 755                 if (fp) {
 756                         /* Let's check to see if it is a frame pointer */
 757                         while (fp >= (addr - 1) && fp < endstack && fp)
 758                                 fp = (unsigned int *)*fp;
 759                         if (fp == 0 || fp == endstack) {
 760                                 fp = addr - 1;
 761                                 break;
 762                         }
 763                         fp = 0;
 764                 }
 765         }
 766         if (fp) {
 767                 frame = fp;
 768                 printk(" FP: (0x%p)\n", fp);
 769         } else
 770                 frame = 0;
 771
 772         /*
 773          * Now that we think we know where things are, we
 774          * walk the stack again, this time printing things out
 775          * incase there is no frame pointer, we still look for
 776          * valid return addresses
 777          */
 778
 779         /* First time print out data, next time, print out symbols */
 780         for (j = 0; j <= 1; j++) {
 781                 if (j)
 782                         printk(KERN_NOTICE "Return addresses in stack:\n");
 783                 else
 784                         printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack);
 785
 786                 fp = frame;
 787                 frame_no = 0;
 788
 789                 for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
 790                      addr <= endstack; addr++, i++) {
 791
 792                         ret_addr = 0;
 793                         if (!j && i % 8 == 0)
 794                                 printk("\n" KERN_NOTICE "%p:",addr);
 795
 796                         /* if it is an odd address, or zero, just skip it */
 797                         if (*addr & 0x1 || !*addr)
 798                                 goto print;
 799
 800                         ins_addr = (unsigned short *)*addr;
 801
 802                         /* Go back one instruction, and see if it is a CALL */
 803                         ins_addr--;
 804                         ret_addr = is_bfin_call(ins_addr);
 805  print:
 806                         if (!j && stack == (unsigned long *)addr)
 807                                 printk("[%08x]", *addr);
 808                         else if (ret_addr)
 809                                 if (j) {
 810                                         decode_address(buf, (unsigned int)*addr);
 811                                         if (frame == addr) {
 812                                                 printk(KERN_NOTICE "   frame %2i : %s\n", frame_no, buf);
 813                                                 continue;
 814                                         }
 815                                         printk(KERN_NOTICE "    address : %s\n", buf);
 816                                 } else
 817                                         printk("<%08x>", *addr);
 818                         else if (fp == addr) {
 819                                 if (j)
 820                                         frame = addr+1;
 821                                 else
 822                                         printk("(%08x)", *addr);
 823
 824                                 fp = (unsigned int *)*addr;
 825                                 frame_no++;
 826
 827                         } else if (!j)
 828                                 printk(" %08x ", *addr);
 829                 }
 830                 if (!j)
 831                         printk("\n");
 832         }
 833
 834 }
 835
 836 void dump_stack(void)
 837 {
 838         unsigned long stack;
 839 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
 840         int tflags;
 841 #endif
 842         trace_buffer_save(tflags);
 843         dump_bfin_trace_buffer();
 844         show_stack(current, &stack);
 845         trace_buffer_restore(tflags);
 846 }
 847 EXPORT_SYMBOL(dump_stack);
 848
 849 void dump_bfin_process(struct pt_regs *fp)
 850 {
 851         /* We should be able to look at fp->ipend, but we don't push it on the
 852          * stack all the time, so do this until we fix that */
 853         unsigned int context = bfin_read_IPEND();
 854
 855         if (oops_in_progress)
 856                 printk(KERN_EMERG "Kernel OOPS in progress\n");
 857
 858         if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR)
 859                 printk(KERN_NOTICE "HW Error context\n");
 860         else if (context & 0x0020)
 861                 printk(KERN_NOTICE "Deferred Exception context\n");
 862         else if (context & 0x3FC0)
 863                 printk(KERN_NOTICE "Interrupt context\n");
 864         else if (context & 0x4000)
 865                 printk(KERN_NOTICE "Deferred Interrupt context\n");
 866         else if (context & 0x8000)
 867                 printk(KERN_NOTICE "Kernel process context\n");
 868
 869         /* Because we are crashing, and pointers could be bad, we check things
 870          * pretty closely before we use them
 871          */
 872         if ((unsigned long)current >= FIXED_CODE_START &&
 873             !((unsigned long)current & 0x3) && current->pid) {
 874                 printk(KERN_NOTICE "CURRENT PROCESS:\n");
 875                 if (current->comm >= (char *)FIXED_CODE_START)
 876                         printk(KERN_NOTICE "COMM=%s PID=%d\n",
 877                                 current->comm, current->pid);
 878                 else
 879                         printk(KERN_NOTICE "COMM= invalid\n");
 880
 881                 if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START)
 882                         printk(KERN_NOTICE  "TEXT = 0x%p-0x%p        DATA = 0x%p-0x%p\n"
 883                                 KERN_NOTICE " BSS = 0x%p-0x%p  USER-STACK = 0x%p\n"
 884                                 KERN_NOTICE "\n",
 885                                 (void *)current->mm->start_code,
 886                                 (void *)current->mm->end_code,
 887                                 (void *)current->mm->start_data,
 888                                 (void *)current->mm->end_data,
 889                                 (void *)current->mm->end_data,
 890                                 (void *)current->mm->brk,
 891                                 (void *)current->mm->start_stack);
 892                 else
 893                         printk(KERN_NOTICE "invalid mm\n");
 894         } else
 895                 printk(KERN_NOTICE "\n" KERN_NOTICE
 896                      "No Valid process in current context\n");
 897 }
 898
 899 void dump_bfin_mem(struct pt_regs *fp)
 900 {
 901         unsigned short *addr, *erraddr, val = 0, err = 0;
 902         char sti = 0, buf[6];
 903
 904         erraddr = (void *)fp->pc;
 905
 906         printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr);
 907
 908         for (addr = (unsigned short *)((unsigned long)erraddr & ~0xF) - 0x10;
 909              addr < (unsigned short *)((unsigned long)erraddr & ~0xF) + 0x10;
 910              addr++) {
 911                 if (!((unsigned long)addr & 0xF))
 912                         printk("\n" KERN_NOTICE "0x%p: ", addr);
 913
 914                 if (get_instruction(&val, addr)) {
 915                                 val = 0;
 916                                 sprintf(buf, "????");
 917                 } else
 918                         sprintf(buf, "%04x", val);
 919
 920                 if (addr == erraddr) {
 921                         printk("[%s]", buf);
 922                         err = val;
 923                 } else
 924                         printk(" %s ", buf);
 925
 926                 /* Do any previous instructions turn on interrupts? */
 927                 if (addr <= erraddr &&                          /* in the past */
 928                     ((val >= 0x0040 && val <= 0x0047) ||        /* STI instruction */
 929                       val == 0x017b))                           /* [SP++] = RETI */
 930                         sti = 1;
 931         }
 932
 933         printk("\n");
 934
 935         /* Hardware error interrupts can be deferred */
 936         if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR &&
 937             oops_in_progress)){
 938                 printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n");
 939 #ifndef CONFIG_DEBUG_HWERR
 940                 printk(KERN_NOTICE "The remaining message may be meaningless\n"
 941                         KERN_NOTICE "You should enable CONFIG_DEBUG_HWERR to get a"
 942                          " better idea where it came from\n");
 943 #else
 944                 /* If we are handling only one peripheral interrupt
 945                  * and current mm and pid are valid, and the last error
 946                  * was in that user space process's text area
 947                  * print it out - because that is where the problem exists
 948                  */
 949                 if ((!(((fp)->ipend & ~0x30) & (((fp)->ipend & ~0x30) - 1))) &&
 950                      (current->pid && current->mm)) {
 951                         /* And the last RETI points to the current userspace context */
 952                         if ((fp + 1)->pc >= current->mm->start_code &&
 953                             (fp + 1)->pc <= current->mm->end_code) {
 954                                 printk(KERN_NOTICE "It might be better to look around here : \n");
 955                                 printk(KERN_NOTICE "-------------------------------------------\n");
 956                                 show_regs(fp + 1);
 957                                 printk(KERN_NOTICE "-------------------------------------------\n");
 958                         }
 959                 }
 960 #endif
 961         }
 962 }
 963
 964 void show_regs(struct pt_regs *fp)
 965 {
 966         char buf [150];
 967         struct irqaction *action;
 968         unsigned int i;
 969         unsigned long flags;
 970
 971         printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\t\t%s\n", print_tainted());
 972         printk(KERN_NOTICE " SEQSTAT: %08lx  IPEND: %04lx  SYSCFG: %04lx\n",
 973                 (long)fp->seqstat, fp->ipend, fp->syscfg);
 974         printk(KERN_NOTICE "  HWERRCAUSE: 0x%lx\n",
 975                 (fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14);
 976         printk(KERN_NOTICE "  EXCAUSE   : 0x%lx\n",
 977                 fp->seqstat & SEQSTAT_EXCAUSE);
 978         for (i = 6; i <= 15 ; i++) {
 979                 if (fp->ipend & (1 << i)) {
 980                         decode_address(buf, bfin_read32(EVT0 + 4*i));
 981                         printk(KERN_NOTICE "  physical IVG%i asserted : %s\n", i, buf);
 982                 }
 983         }
 984
 985         /* if no interrupts are going off, don't print this out */
 986         if (fp->ipend & ~0x3F) {
 987                 for (i = 0; i < (NR_IRQS - 1); i++) {
 988                         spin_lock_irqsave(&irq_desc[i].lock, flags);
 989                         action = irq_desc[i].action;
 990                         if (!action)
 991                                 goto unlock;
 992
 993                         decode_address(buf, (unsigned int)action->handler);
 994                         printk(KERN_NOTICE "  logical irq %3d mapped  : %s", i, buf);
 995                         for (action = action->next; action; action = action->next) {
 996                                 decode_address(buf, (unsigned int)action->handler);
 997                                 printk(", %s", buf);
 998                         }
 999                         printk("\n");
1000 unlock:
1001                         spin_unlock_irqrestore(&irq_desc[i].lock, flags);
1002                 }
1003         }
1004
1005         decode_address(buf, fp->rete);
1006         printk(KERN_NOTICE " RETE: %s\n", buf);
1007         decode_address(buf, fp->retn);
1008         printk(KERN_NOTICE " RETN: %s\n", buf);
1009         decode_address(buf, fp->retx);
1010         printk(KERN_NOTICE " RETX: %s\n", buf);
1011         decode_address(buf, fp->rets);
1012         printk(KERN_NOTICE " RETS: %s\n", buf);
1013         decode_address(buf, fp->pc);
1014         printk(KERN_NOTICE " PC  : %s\n", buf);
1015
1016         if (((long)fp->seqstat &  SEQSTAT_EXCAUSE) &&
1017             (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) {
1018                 decode_address(buf, saved_dcplb_fault_addr);
1019                 printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
1020                 decode_address(buf, saved_icplb_fault_addr);
1021                 printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf);
1022         }
1023
1024         printk(KERN_NOTICE "\n" KERN_NOTICE "PROCESSOR STATE:\n");
1025         printk(KERN_NOTICE " R0 : %08lx    R1 : %08lx    R2 : %08lx    R3 : %08lx\n",
1026                 fp->r0, fp->r1, fp->r2, fp->r3);
1027         printk(KERN_NOTICE " R4 : %08lx    R5 : %08lx    R6 : %08lx    R7 : %08lx\n",
1028                 fp->r4, fp->r5, fp->r6, fp->r7);
1029         printk(KERN_NOTICE " P0 : %08lx    P1 : %08lx    P2 : %08lx    P3 : %08lx\n",
1030                 fp->p0, fp->p1, fp->p2, fp->p3);
1031         printk(KERN_NOTICE " P4 : %08lx    P5 : %08lx    FP : %08lx    SP : %08lx\n",
1032                 fp->p4, fp->p5, fp->fp, (long)fp);
1033         printk(KERN_NOTICE " LB0: %08lx    LT0: %08lx    LC0: %08lx\n",
1034                 fp->lb0, fp->lt0, fp->lc0);
1035         printk(KERN_NOTICE " LB1: %08lx    LT1: %08lx    LC1: %08lx\n",
1036                 fp->lb1, fp->lt1, fp->lc1);
1037         printk(KERN_NOTICE " B0 : %08lx    L0 : %08lx    M0 : %08lx    I0 : %08lx\n",
1038                 fp->b0, fp->l0, fp->m0, fp->i0);
1039         printk(KERN_NOTICE " B1 : %08lx    L1 : %08lx    M1 : %08lx    I1 : %08lx\n",
1040                 fp->b1, fp->l1, fp->m1, fp->i1);
1041         printk(KERN_NOTICE " B2 : %08lx    L2 : %08lx    M2 : %08lx    I2 : %08lx\n",
1042                 fp->b2, fp->l2, fp->m2, fp->i2);
1043         printk(KERN_NOTICE " B3 : %08lx    L3 : %08lx    M3 : %08lx    I3 : %08lx\n",
1044                 fp->b3, fp->l3, fp->m3, fp->i3);
1045         printk(KERN_NOTICE "A0.w: %08lx   A0.x: %08lx   A1.w: %08lx   A1.x: %08lx\n",
1046                 fp->a0w, fp->a0x, fp->a1w, fp->a1x);
1047
1048         printk(KERN_NOTICE "USP : %08lx  ASTAT: %08lx\n",
1049                 rdusp(), fp->astat);
1050
1051         printk(KERN_NOTICE "\n");
1052 }
1053
1054 #ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
1055 asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
1056 #endif
1057
1058 asmlinkage int sys_bfin_spinlock(int *spinlock)
1059 {
1060         int ret = 0;
1061         int tmp = 0;
1062
1063         local_irq_disable();
1064         ret = get_user(tmp, spinlock);
1065         if (ret == 0) {
1066                 if (tmp)
1067                         ret = 1;
1068                 tmp = 1;
1069                 put_user(tmp, spinlock);
1070         }
1071         local_irq_enable();
1072         return ret;
1073 }
1074
1075 int bfin_request_exception(unsigned int exception, void (*handler)(void))
1076 {
1077         void (*curr_handler)(void);
1078
1079         if (exception > 0x3F)
1080                 return -EINVAL;
1081
1082         curr_handler = ex_table[exception];
1083
1084         if (curr_handler != ex_replaceable)
1085                 return -EBUSY;
1086
1087         ex_table[exception] = handler;
1088
1089         return 0;
1090 }
1091 EXPORT_SYMBOL(bfin_request_exception);
1092
1093 int bfin_free_exception(unsigned int exception, void (*handler)(void))
1094 {
1095         void (*curr_handler)(void);
1096
1097         if (exception > 0x3F)
1098                 return -EINVAL;
1099
1100         curr_handler = ex_table[exception];
1101
1102         if (curr_handler != handler)
1103                 return -EBUSY;
1104
1105         ex_table[exception] = ex_replaceable;
1106
1107         return 0;
1108 }
1109 EXPORT_SYMBOL(bfin_free_exception);
1110
1111 void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
1112 {
1113         switch (cplb_panic) {
1114         case CPLB_NO_UNLOCKED:
1115                 printk(KERN_EMERG "All CPLBs are locked\n");
1116                 break;
1117         case CPLB_PROT_VIOL:
1118                 return;
1119         case CPLB_NO_ADDR_MATCH:
1120                 return;
1121         case CPLB_UNKNOWN_ERR:
1122                 printk(KERN_EMERG "Unknown CPLB Exception\n");
1123                 break;
1124         }
1125
1126         oops_in_progress = 1;
1127
1128         dump_bfin_process(fp);
1129         dump_bfin_mem(fp);
1130         show_regs(fp);
1131         dump_stack();
1132         panic("Unrecoverable event\n");
1133 }