err.no Git - linux-2.6/blob - arch/blackfin/kernel/traps.c

   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 <asm/uaccess.h>
  31 #include <asm/traps.h>
  32 #include <asm/cacheflush.h>
  33 #include <asm/blackfin.h>
  34 #include <asm/uaccess.h>
  35 #include <asm/irq_handler.h>
  36 #include <asm/trace.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/module.h>
  39 #include <linux/kallsyms.h>
  40
  41 #ifdef CONFIG_KGDB
  42 # include <linux/debugger.h>
  43 # include <linux/kgdb.h>
  44 #endif
  45
  46 /* Initiate the event table handler */
  47 void __init trap_init(void)
  48 {
  49         CSYNC();
  50         bfin_write_EVT3(trap);
  51         CSYNC();
  52 }
  53
  54 asmlinkage void trap_c(struct pt_regs *fp);
  55
  56 int kstack_depth_to_print = 48;
  57
  58 static int printk_address(unsigned long address)
  59 {
  60         struct vm_list_struct *vml;
  61         struct task_struct *p;
  62         struct mm_struct *mm;
  63         unsigned long offset;
  64
  65 #ifdef CONFIG_KALLSYMS
  66         unsigned long symsize;
  67         const char *symname;
  68         char *modname;
  69         char *delim = ":";
  70         char namebuf[128];
  71
  72         /* look up the address and see if we are in kernel space */
  73         symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
  74
  75         if (symname) {
  76                 /* yeah! kernel space! */
  77                 if (!modname)
  78                         modname = delim = "";
  79                 return printk("<0x%p> { %s%s%s%s + 0x%lx }",
  80                               (void*)address, delim, modname, delim, symname,
  81                               (unsigned long)offset);
  82
  83         }
  84 #endif
  85
  86         /* looks like we're off in user-land, so let's walk all the
  87          * mappings of all our processes and see if we can't be a whee
  88          * bit more specific
  89          */
  90         write_lock_irq(&tasklist_lock);
  91         for_each_process(p) {
  92                 mm = get_task_mm(p);
  93                 if (!mm)
  94                         continue;
  95
  96                 vml = mm->context.vmlist;
  97                 while (vml) {
  98                         struct vm_area_struct *vma = vml->vma;
  99
 100                         if (address >= vma->vm_start && address < vma->vm_end) {
 101                                 char *name = p->comm;
 102                                 struct file *file = vma->vm_file;
 103                                 if (file) {
 104                                         char _tmpbuf[256];
 105                                         name = d_path(file->f_dentry,
 106                                                       file->f_vfsmnt,
 107                                                       _tmpbuf,
 108                                                       sizeof(_tmpbuf));
 109                                 }
 110
 111                                 /* FLAT does not have its text aligned to the start of
 112                                  * the map while FDPIC ELF does ...
 113                                  */
 114                                 if (current->mm &&
 115                                     (address > current->mm->start_code) &&
 116                                     (address < current->mm->end_code))
 117                                         offset = address - current->mm->start_code;
 118                                 else
 119                                         offset = (address - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT);
 120
 121                                 write_unlock_irq(&tasklist_lock);
 122                                 return printk("<0x%p> [ %s + 0x%lx ]",
 123                                               (void*)address, name, offset);
 124                         }
 125
 126                         vml = vml->next;
 127                 }
 128         }
 129         write_unlock_irq(&tasklist_lock);
 130
 131         /* we were unable to find this address anywhere */
 132         return printk("[<0x%p>]", (void*)address);
 133 }
 134
 135 asmlinkage void trap_c(struct pt_regs *fp)
 136 {
 137         int j, sig = 0;
 138         siginfo_t info;
 139         unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
 140
 141 #ifdef CONFIG_KGDB
 142 # define CHK_DEBUGGER_TRAP() \
 143         do { \
 144                 CHK_DEBUGGER(trapnr, sig, info.si_code, fp); \
 145         } while (0)
 146 # define CHK_DEBUGGER_TRAP_MAYBE() \
 147         do { \
 148                 if (kgdb_connected) \
 149                         CHK_DEBUGGER_TRAP(); \
 150         } while (0)
 151 #else
 152 # define CHK_DEBUGGER_TRAP() do { } while (0)
 153 # define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0)
 154 #endif
 155
 156         trace_buffer_save(j);
 157
 158         /* trap_c() will be called for exceptions. During exceptions
 159          * processing, the pc value should be set with retx value.
 160          * With this change we can cleanup some code in signal.c- TODO
 161          */
 162         fp->orig_pc = fp->retx;
 163         /* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n",
 164                 trapnr, fp->ipend, fp->pc, fp->retx); */
 165
 166         /* send the appropriate signal to the user program */
 167         switch (trapnr) {
 168
 169         /* This table works in conjuction with the one in ./mach-common/entry.S
 170          * Some exceptions are handled there (in assembly, in exception space)
 171          * Some are handled here, (in C, in interrupt space)
 172          * Some, like CPLB, are handled in both, where the normal path is
 173          * handled in assembly/exception space, and the error path is handled
 174          * here
 175          */
 176
 177         /* 0x00 - Linux Syscall, getting here is an error */
 178         /* 0x01 - userspace gdb breakpoint, handled here */
 179         case VEC_EXCPT01:
 180                 info.si_code = TRAP_ILLTRAP;
 181                 sig = SIGTRAP;
 182                 CHK_DEBUGGER_TRAP_MAYBE();
 183                 /* Check if this is a breakpoint in kernel space */
 184                 if (fp->ipend & 0xffc0)
 185                         return;
 186                 else
 187                         break;
 188 #ifdef CONFIG_KGDB
 189         case VEC_EXCPT02 :               /* gdb connection */
 190                 info.si_code = TRAP_ILLTRAP;
 191                 sig = SIGTRAP;
 192                 CHK_DEBUGGER_TRAP();
 193                 return;
 194 #else
 195         /* 0x02 - User Defined, Caught by default */
 196 #endif
 197         /* 0x03  - Atomic test and set */
 198         case VEC_EXCPT03:
 199                 info.si_code = SEGV_STACKFLOW;
 200                 sig = SIGSEGV;
 201                 printk(KERN_EMERG EXC_0x03);
 202                 CHK_DEBUGGER_TRAP();
 203                 break;
 204         /* 0x04 - spinlock - handled by _ex_spinlock,
 205                 getting here is an error */
 206         /* 0x05 - User Defined, Caught by default */
 207         /* 0x06 - User Defined, Caught by default */
 208         /* 0x07 - User Defined, Caught by default */
 209         /* 0x08 - User Defined, Caught by default */
 210         /* 0x09 - User Defined, Caught by default */
 211         /* 0x0A - User Defined, Caught by default */
 212         /* 0x0B - User Defined, Caught by default */
 213         /* 0x0C - User Defined, Caught by default */
 214         /* 0x0D - User Defined, Caught by default */
 215         /* 0x0E - User Defined, Caught by default */
 216         /* 0x0F - User Defined, Caught by default */
 217         /* 0x10 HW Single step, handled here */
 218         case VEC_STEP:
 219                 info.si_code = TRAP_STEP;
 220                 sig = SIGTRAP;
 221                 CHK_DEBUGGER_TRAP_MAYBE();
 222                 /* Check if this is a single step in kernel space */
 223                 if (fp->ipend & 0xffc0)
 224                         return;
 225                 else
 226                         break;
 227         /* 0x11 - Trace Buffer Full, handled here */
 228         case VEC_OVFLOW:
 229                 info.si_code = TRAP_TRACEFLOW;
 230                 sig = SIGTRAP;
 231                 printk(KERN_EMERG EXC_0x11);
 232                 CHK_DEBUGGER_TRAP();
 233                 break;
 234         /* 0x12 - Reserved, Caught by default */
 235         /* 0x13 - Reserved, Caught by default */
 236         /* 0x14 - Reserved, Caught by default */
 237         /* 0x15 - Reserved, Caught by default */
 238         /* 0x16 - Reserved, Caught by default */
 239         /* 0x17 - Reserved, Caught by default */
 240         /* 0x18 - Reserved, Caught by default */
 241         /* 0x19 - Reserved, Caught by default */
 242         /* 0x1A - Reserved, Caught by default */
 243         /* 0x1B - Reserved, Caught by default */
 244         /* 0x1C - Reserved, Caught by default */
 245         /* 0x1D - Reserved, Caught by default */
 246         /* 0x1E - Reserved, Caught by default */
 247         /* 0x1F - Reserved, Caught by default */
 248         /* 0x20 - Reserved, Caught by default */
 249         /* 0x21 - Undefined Instruction, handled here */
 250         case VEC_UNDEF_I:
 251                 info.si_code = ILL_ILLOPC;
 252                 sig = SIGILL;
 253                 printk(KERN_EMERG EXC_0x21);
 254                 CHK_DEBUGGER_TRAP();
 255                 break;
 256         /* 0x22 - Illegal Instruction Combination, handled here */
 257         case VEC_ILGAL_I:
 258                 info.si_code = ILL_ILLPARAOP;
 259                 sig = SIGILL;
 260                 printk(KERN_EMERG EXC_0x22);
 261                 CHK_DEBUGGER_TRAP();
 262                 break;
 263         /* 0x23 - Data CPLB Protection Violation,
 264                  normal case is handled in _cplb_hdr */
 265         case VEC_CPLB_VL:
 266                 info.si_code = ILL_CPLB_VI;
 267                 sig = SIGILL;
 268                 printk(KERN_EMERG EXC_0x23);
 269                 CHK_DEBUGGER_TRAP();
 270                 break;
 271         /* 0x24 - Data access misaligned, handled here */
 272         case VEC_MISALI_D:
 273                 info.si_code = BUS_ADRALN;
 274                 sig = SIGBUS;
 275                 printk(KERN_EMERG EXC_0x24);
 276                 CHK_DEBUGGER_TRAP();
 277                 break;
 278         /* 0x25 - Unrecoverable Event, handled here */
 279         case VEC_UNCOV:
 280                 info.si_code = ILL_ILLEXCPT;
 281                 sig = SIGILL;
 282                 printk(KERN_EMERG EXC_0x25);
 283                 CHK_DEBUGGER_TRAP();
 284                 break;
 285         /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr,
 286                 error case is handled here */
 287         case VEC_CPLB_M:
 288                 info.si_code = BUS_ADRALN;
 289                 sig = SIGBUS;
 290                 printk(KERN_EMERG EXC_0x26);
 291                 CHK_DEBUGGER_TRAP();
 292                 break;
 293         /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
 294         case VEC_CPLB_MHIT:
 295                 info.si_code = ILL_CPLB_MULHIT;
 296 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
 297                 sig = SIGSEGV;
 298                 printk(KERN_EMERG "\n"
 299                         KERN_EMERG "NULL pointer access (probably)\n");
 300 #else
 301                 sig = SIGILL;
 302                 printk(KERN_EMERG EXC_0x27);
 303 #endif
 304                 CHK_DEBUGGER_TRAP();
 305                 break;
 306         /* 0x28 - Emulation Watchpoint, handled here */
 307         case VEC_WATCH:
 308                 info.si_code = TRAP_WATCHPT;
 309                 sig = SIGTRAP;
 310                 pr_debug(EXC_0x28);
 311                 CHK_DEBUGGER_TRAP_MAYBE();
 312                 /* Check if this is a watchpoint in kernel space */
 313                 if (fp->ipend & 0xffc0)
 314                         return;
 315                 else
 316                         break;
 317 #ifdef CONFIG_BF535
 318         /* 0x29 - Instruction fetch access error (535 only) */
 319         case VEC_ISTRU_VL:      /* ADSP-BF535 only (MH) */
 320                 info.si_code = BUS_OPFETCH;
 321                 sig = SIGBUS;
 322                 printk(KERN_EMERG "BF535: VEC_ISTRU_VL\n");
 323                 CHK_DEBUGGER_TRAP();
 324                 break;
 325 #else
 326         /* 0x29 - Reserved, Caught by default */
 327 #endif
 328         /* 0x2A - Instruction fetch misaligned, handled here */
 329         case VEC_MISALI_I:
 330                 info.si_code = BUS_ADRALN;
 331                 sig = SIGBUS;
 332                 printk(KERN_EMERG EXC_0x2A);
 333                 CHK_DEBUGGER_TRAP();
 334                 break;
 335         /* 0x2B - Instruction CPLB protection Violation,
 336                 handled in _cplb_hdr */
 337         case VEC_CPLB_I_VL:
 338                 info.si_code = ILL_CPLB_VI;
 339                 sig = SIGILL;
 340                 printk(KERN_EMERG EXC_0x2B);
 341                 CHK_DEBUGGER_TRAP();
 342                 break;
 343         /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */
 344         case VEC_CPLB_I_M:
 345                 info.si_code = ILL_CPLB_MISS;
 346                 sig = SIGBUS;
 347                 printk(KERN_EMERG EXC_0x2C);
 348                 CHK_DEBUGGER_TRAP();
 349                 break;
 350         /* 0x2D - Instruction CPLB Multiple Hits, handled here */
 351         case VEC_CPLB_I_MHIT:
 352                 info.si_code = ILL_CPLB_MULHIT;
 353 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
 354                 sig = SIGSEGV;
 355                 printk(KERN_EMERG "\n\nJump to address 0 - 0x0fff\n");
 356 #else
 357                 sig = SIGILL;
 358                 printk(KERN_EMERG EXC_0x2D);
 359 #endif
 360                 CHK_DEBUGGER_TRAP();
 361                 break;
 362         /* 0x2E - Illegal use of Supervisor Resource, handled here */
 363         case VEC_ILL_RES:
 364                 info.si_code = ILL_PRVOPC;
 365                 sig = SIGILL;
 366                 printk(KERN_EMERG EXC_0x2E);
 367                 CHK_DEBUGGER_TRAP();
 368                 break;
 369         /* 0x2F - Reserved, Caught by default */
 370         /* 0x30 - Reserved, Caught by default */
 371         /* 0x31 - Reserved, Caught by default */
 372         /* 0x32 - Reserved, Caught by default */
 373         /* 0x33 - Reserved, Caught by default */
 374         /* 0x34 - Reserved, Caught by default */
 375         /* 0x35 - Reserved, Caught by default */
 376         /* 0x36 - Reserved, Caught by default */
 377         /* 0x37 - Reserved, Caught by default */
 378         /* 0x38 - Reserved, Caught by default */
 379         /* 0x39 - Reserved, Caught by default */
 380         /* 0x3A - Reserved, Caught by default */
 381         /* 0x3B - Reserved, Caught by default */
 382         /* 0x3C - Reserved, Caught by default */
 383         /* 0x3D - Reserved, Caught by default */
 384         /* 0x3E - Reserved, Caught by default */
 385         /* 0x3F - Reserved, Caught by default */
 386         default:
 387                 info.si_code = TRAP_ILLTRAP;
 388                 sig = SIGTRAP;
 389                 printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n",
 390                         (fp->seqstat & SEQSTAT_EXCAUSE));
 391                 CHK_DEBUGGER_TRAP();
 392                 break;
 393         }
 394
 395         info.si_signo = sig;
 396         info.si_errno = 0;
 397         info.si_addr = (void *)fp->pc;
 398         force_sig_info(sig, &info, current);
 399         if (sig != 0 && sig != SIGTRAP) {
 400                 unsigned long stack;
 401                 dump_bfin_regs(fp, (void *)fp->retx);
 402                 dump_bfin_trace_buffer();
 403                 show_stack(current, &stack);
 404                 if (current->mm == NULL)
 405                         panic("Kernel exception");
 406         }
 407
 408         /* if the address that we are about to return to is not valid, set it
 409          * to a valid address, if we have a current application or panic
 410          */
 411         if (!(fp->pc <= physical_mem_end
 412 #if L1_CODE_LENGTH != 0
 413             || (fp->pc >= L1_CODE_START &&
 414                 fp->pc <= (L1_CODE_START + L1_CODE_LENGTH))
 415 #endif
 416         )) {
 417                 if (current->mm) {
 418                         fp->pc = current->mm->start_code;
 419                 } else {
 420                         printk(KERN_EMERG
 421                                 "I can't return to memory that doesn't exist"
 422                                 " - bad things happen\n");
 423                         panic("Help - I've fallen and can't get up\n");
 424                 }
 425         }
 426
 427         trace_buffer_restore(j);
 428         return;
 429 }
 430
 431 /* Typical exception handling routines  */
 432
 433 void dump_bfin_trace_buffer(void)
 434 {
 435         int tflags;
 436         trace_buffer_save(tflags);
 437
 438         if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
 439                 int i;
 440                 printk(KERN_EMERG "Hardware Trace:\n");
 441                 for (i = 0; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
 442                         printk(KERN_EMERG "%2i Target : ", i);
 443                         printk_address((unsigned long)bfin_read_TBUF());
 444                         printk("\n" KERN_EMERG "   Source : ");
 445                         printk_address((unsigned long)bfin_read_TBUF());
 446                         printk("\n");
 447                 }
 448         }
 449
 450         trace_buffer_restore(tflags);
 451 }
 452 EXPORT_SYMBOL(dump_bfin_trace_buffer);
 453
 454 static void show_trace(struct task_struct *tsk, unsigned long *sp)
 455 {
 456         unsigned long addr;
 457
 458         printk("\nCall Trace:");
 459 #ifdef CONFIG_KALLSYMS
 460         printk("\n");
 461 #endif
 462
 463         while (!kstack_end(sp)) {
 464                 addr = *sp++;
 465                 /*
 466                  * If the address is either in the text segment of the
 467                  * kernel, or in the region which contains vmalloc'ed
 468                  * memory, it *may* be the address of a calling
 469                  * routine; if so, print it so that someone tracing
 470                  * down the cause of the crash will be able to figure
 471                  * out the call path that was taken.
 472                  */
 473                 if (kernel_text_address(addr))
 474                         print_ip_sym(addr);
 475         }
 476
 477         printk("\n");
 478 }
 479
 480 void show_stack(struct task_struct *task, unsigned long *stack)
 481 {
 482         unsigned long *endstack, addr;
 483         int i;
 484
 485         /* Cannot call dump_bfin_trace_buffer() here as show_stack() is
 486          * called externally in some places in the kernel.
 487          */
 488
 489         if (!stack) {
 490                 if (task)
 491                         stack = (unsigned long *)task->thread.ksp;
 492                 else
 493                         stack = (unsigned long *)&stack;
 494         }
 495
 496         addr = (unsigned long)stack;
 497         endstack = (unsigned long *)PAGE_ALIGN(addr);
 498
 499         printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack);
 500         for (i = 0; i < kstack_depth_to_print; i++) {
 501                 if (stack + 1 > endstack)
 502                         break;
 503                 if (i % 8 == 0)
 504                         printk("\n" KERN_EMERG "       ");
 505                 printk(" %08lx", *stack++);
 506         }
 507
 508         show_trace(task, stack);
 509 }
 510
 511 void dump_stack(void)
 512 {
 513         unsigned long stack;
 514         int tflags;
 515         trace_buffer_save(tflags);
 516         dump_bfin_trace_buffer();
 517         show_stack(current, &stack);
 518         trace_buffer_restore(tflags);
 519 }
 520
 521 EXPORT_SYMBOL(dump_stack);
 522
 523 void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
 524 {
 525         if (current->pid) {
 526                 printk(KERN_EMERG "\n" KERN_EMERG "CURRENT PROCESS:\n"
 527                         KERN_EMERG "\n");
 528                 printk(KERN_EMERG "COMM=%s PID=%d\n",
 529                         current->comm, current->pid);
 530         } else {
 531                 printk
 532                     (KERN_EMERG "\n" KERN_EMERG
 533                      "No Valid pid - Either things are really messed up,"
 534                      " or you are in the kernel\n");
 535         }
 536
 537         if (current->mm) {
 538                 printk(KERN_EMERG "TEXT = 0x%p-0x%p  DATA = 0x%p-0x%p\n"
 539                        KERN_EMERG "BSS = 0x%p-0x%p   USER-STACK = 0x%p\n"
 540                        KERN_EMERG "\n",
 541                        (void*)current->mm->start_code,
 542                        (void*)current->mm->end_code,
 543                        (void*)current->mm->start_data,
 544                        (void*)current->mm->end_data,
 545                        (void*)current->mm->end_data,
 546                        (void*)current->mm->brk,
 547                        (void*)current->mm->start_stack);
 548         }
 549
 550         printk(KERN_EMERG "return address: [0x%p]; contents of:", retaddr);
 551         if (retaddr != 0 && retaddr <= (void*)physical_mem_end
 552 #if L1_CODE_LENGTH != 0
 553             /* FIXME: Copy the code out of L1 Instruction SRAM through dma
 554                memcpy.  */
 555             && !(retaddr >= (void*)L1_CODE_START
 556                  && retaddr < (void*)(L1_CODE_START + L1_CODE_LENGTH))
 557 #endif
 558         ) {
 559                 int i = ((unsigned int)retaddr & 0xFFFFFFF0) - 32;
 560                 unsigned short x = 0;
 561                 for (; i < ((unsigned int)retaddr & 0xFFFFFFF0 ) + 32 ;
 562                         i += 2) {
 563                         if ( !(i & 0xF) )
 564                                 printk(KERN_EMERG "\n" KERN_EMERG
 565                                         "0x%08x: ", i);
 566
 567                         if (get_user(x, (unsigned short *)i))
 568                                 break;
 569 #ifndef CONFIG_DEBUG_HWERR
 570                         /* If one of the last few instructions was a STI
 571                          * it is likely that the error occured awhile ago
 572                          * and we just noticed
 573                          */
 574                         if (x >= 0x0040 && x <= 0x0047 && i <= 0)
 575                                 panic("\n\nWARNING : You should reconfigure"
 576                                         " the kernel to turn on\n"
 577                                         " 'Hardware error interrupt"
 578                                         " debugging'\n"
 579                                         " The rest of this error"
 580                                         " is meanless\n");
 581 #endif
 582                         if ( i == (unsigned int)retaddr )
 583                                 printk("[%04x]", x);
 584                         else
 585                                 printk(" %04x ", x);
 586                 }
 587                 printk("\n" KERN_EMERG "\n");
 588         } else
 589                 printk(KERN_EMERG
 590                         "Cannot look at the [PC] for it is"
 591                         "in unreadable L1 SRAM - sorry\n");
 592
 593
 594         printk(KERN_EMERG
 595                 "RETE:  %08lx  RETN: %08lx  RETX: %08lx  RETS: %08lx\n",
 596                 fp->rete, fp->retn, fp->retx, fp->rets);
 597         printk(KERN_EMERG "IPEND: %04lx  SYSCFG: %04lx\n",
 598                 fp->ipend, fp->syscfg);
 599         printk(KERN_EMERG "SEQSTAT: %08lx    SP: %08lx\n",
 600                 (long)fp->seqstat, (long)fp);
 601         printk(KERN_EMERG "R0: %08lx    R1: %08lx    R2: %08lx    R3: %08lx\n",
 602                 fp->r0, fp->r1, fp->r2, fp->r3);
 603         printk(KERN_EMERG "R4: %08lx    R5: %08lx    R6: %08lx    R7: %08lx\n",
 604                 fp->r4, fp->r5, fp->r6, fp->r7);
 605         printk(KERN_EMERG "P0: %08lx    P1: %08lx    P2: %08lx    P3: %08lx\n",
 606                 fp->p0, fp->p1, fp->p2, fp->p3);
 607         printk(KERN_EMERG
 608                 "P4: %08lx    P5: %08lx    FP: %08lx\n",
 609                 fp->p4, fp->p5, fp->fp);
 610         printk(KERN_EMERG
 611                 "A0.w: %08lx    A0.x: %08lx    A1.w: %08lx    A1.x: %08lx\n",
 612                 fp->a0w, fp->a0x, fp->a1w, fp->a1x);
 613
 614         printk(KERN_EMERG "LB0: %08lx  LT0: %08lx  LC0: %08lx\n",
 615                 fp->lb0, fp->lt0, fp->lc0);
 616         printk(KERN_EMERG "LB1: %08lx  LT1: %08lx  LC1: %08lx\n",
 617                 fp->lb1, fp->lt1, fp->lc1);
 618         printk(KERN_EMERG "B0: %08lx  L0: %08lx  M0: %08lx  I0: %08lx\n",
 619                 fp->b0, fp->l0, fp->m0, fp->i0);
 620         printk(KERN_EMERG "B1: %08lx  L1: %08lx  M1: %08lx  I1: %08lx\n",
 621                 fp->b1, fp->l1, fp->m1, fp->i1);
 622         printk(KERN_EMERG "B2: %08lx  L2: %08lx  M2: %08lx  I2: %08lx\n",
 623                 fp->b2, fp->l2, fp->m2, fp->i2);
 624         printk(KERN_EMERG "B3: %08lx  L3: %08lx  M3: %08lx  I3: %08lx\n",
 625                 fp->b3, fp->l3, fp->m3, fp->i3);
 626
 627         printk(KERN_EMERG "\n" KERN_EMERG "USP: %08lx   ASTAT: %08lx\n",
 628                 rdusp(), fp->astat);
 629         if ((long)fp->seqstat & SEQSTAT_EXCAUSE) {
 630                 printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n",
 631                         (void *)bfin_read_DCPLB_FAULT_ADDR());
 632                 printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n",
 633                         (void *)bfin_read_ICPLB_FAULT_ADDR());
 634         }
 635
 636         printk("\n\n");
 637 }
 638
 639 #ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
 640 asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
 641 #endif
 642
 643 asmlinkage int sys_bfin_spinlock(int *spinlock)
 644 {
 645         int ret = 0;
 646         int tmp = 0;
 647
 648         local_irq_disable();
 649         ret = get_user(tmp, spinlock);
 650         if (ret == 0) {
 651                 if (tmp)
 652                         ret = 1;
 653                 tmp = 1;
 654                 put_user(tmp, spinlock);
 655         }
 656         local_irq_enable();
 657         return ret;
 658 }
 659
 660 void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
 661 {
 662         switch (cplb_panic) {
 663         case CPLB_NO_UNLOCKED:
 664                 printk(KERN_EMERG "All CPLBs are locked\n");
 665                 break;
 666         case CPLB_PROT_VIOL:
 667                 return;
 668         case CPLB_NO_ADDR_MATCH:
 669                 return;
 670         case CPLB_UNKNOWN_ERR:
 671                 printk(KERN_EMERG "Unknown CPLB Exception\n");
 672                 break;
 673         }
 674
 675         printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void*)bfin_read_DCPLB_FAULT_ADDR());
 676         printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void*)bfin_read_ICPLB_FAULT_ADDR());
 677         dump_bfin_regs(fp, (void *)fp->retx);
 678         dump_stack();
 679         panic("Unrecoverable event\n");
 680 }