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 <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 <asm/trace.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 - User Defined, userspace stack overflow */
 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 - User Defined, Caught by default */
 205         /* 0x05 - User Defined, Caught by default */
 206         /* 0x06 - User Defined, Caught by default */
 207         /* 0x07 - User Defined, Caught by default */
 208         /* 0x08 - User Defined, Caught by default */
 209         /* 0x09 - User Defined, Caught by default */
 210         /* 0x0A - User Defined, Caught by default */
 211         /* 0x0B - User Defined, Caught by default */
 212         /* 0x0C - User Defined, Caught by default */
 213         /* 0x0D - User Defined, Caught by default */
 214         /* 0x0E - User Defined, Caught by default */
 215         /* 0x0F - User Defined, Caught by default */
 216         /* 0x10 HW Single step, handled here */
 217         case VEC_STEP:
 218                 info.si_code = TRAP_STEP;
 219                 sig = SIGTRAP;
 220                 CHK_DEBUGGER_TRAP_MAYBE();
 221                 /* Check if this is a single step in kernel space */
 222                 if (fp->ipend & 0xffc0)
 223                         return;
 224                 else
 225                         break;
 226         /* 0x11 - Trace Buffer Full, handled here */
 227         case VEC_OVFLOW:
 228                 info.si_code = TRAP_TRACEFLOW;
 229                 sig = SIGTRAP;
 230                 printk(KERN_EMERG EXC_0x11);
 231                 CHK_DEBUGGER_TRAP();
 232                 break;
 233         /* 0x12 - Reserved, Caught by default */
 234         /* 0x13 - Reserved, Caught by default */
 235         /* 0x14 - Reserved, Caught by default */
 236         /* 0x15 - Reserved, Caught by default */
 237         /* 0x16 - Reserved, Caught by default */
 238         /* 0x17 - Reserved, Caught by default */
 239         /* 0x18 - Reserved, Caught by default */
 240         /* 0x19 - Reserved, Caught by default */
 241         /* 0x1A - Reserved, Caught by default */
 242         /* 0x1B - Reserved, Caught by default */
 243         /* 0x1C - Reserved, Caught by default */
 244         /* 0x1D - Reserved, Caught by default */
 245         /* 0x1E - Reserved, Caught by default */
 246         /* 0x1F - Reserved, Caught by default */
 247         /* 0x20 - Reserved, Caught by default */
 248         /* 0x21 - Undefined Instruction, handled here */
 249         case VEC_UNDEF_I:
 250                 info.si_code = ILL_ILLOPC;
 251                 sig = SIGILL;
 252                 printk(KERN_EMERG EXC_0x21);
 253                 CHK_DEBUGGER_TRAP();
 254                 break;
 255         /* 0x22 - Illegal Instruction Combination, handled here */
 256         case VEC_ILGAL_I:
 257                 info.si_code = ILL_ILLPARAOP;
 258                 sig = SIGILL;
 259                 printk(KERN_EMERG EXC_0x22);
 260                 CHK_DEBUGGER_TRAP();
 261                 break;
 262         /* 0x23 - Data CPLB Protection Violation,
 263                  normal case is handled in _cplb_hdr */
 264         case VEC_CPLB_VL:
 265                 info.si_code = ILL_CPLB_VI;
 266                 sig = SIGILL;
 267                 printk(KERN_EMERG EXC_0x23);
 268                 CHK_DEBUGGER_TRAP();
 269                 break;
 270         /* 0x24 - Data access misaligned, handled here */
 271         case VEC_MISALI_D:
 272                 info.si_code = BUS_ADRALN;
 273                 sig = SIGBUS;
 274                 printk(KERN_EMERG EXC_0x24);
 275                 CHK_DEBUGGER_TRAP();
 276                 break;
 277         /* 0x25 - Unrecoverable Event, handled here */
 278         case VEC_UNCOV:
 279                 info.si_code = ILL_ILLEXCPT;
 280                 sig = SIGILL;
 281                 printk(KERN_EMERG EXC_0x25);
 282                 CHK_DEBUGGER_TRAP();
 283                 break;
 284         /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr,
 285                 error case is handled here */
 286         case VEC_CPLB_M:
 287                 info.si_code = BUS_ADRALN;
 288                 sig = SIGBUS;
 289                 printk(KERN_EMERG EXC_0x26);
 290                 CHK_DEBUGGER_TRAP();
 291                 break;
 292         /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
 293         case VEC_CPLB_MHIT:
 294                 info.si_code = ILL_CPLB_MULHIT;
 295 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
 296                 sig = SIGSEGV;
 297                 printk(KERN_EMERG "\n"
 298                         KERN_EMERG "NULL pointer access (probably)\n");
 299 #else
 300                 sig = SIGILL;
 301                 printk(KERN_EMERG EXC_0x27);
 302 #endif
 303                 CHK_DEBUGGER_TRAP();
 304                 break;
 305         /* 0x28 - Emulation Watchpoint, handled here */
 306         case VEC_WATCH:
 307                 info.si_code = TRAP_WATCHPT;
 308                 sig = SIGTRAP;
 309                 pr_debug(EXC_0x28);
 310                 CHK_DEBUGGER_TRAP_MAYBE();
 311                 /* Check if this is a watchpoint in kernel space */
 312                 if (fp->ipend & 0xffc0)
 313                         return;
 314                 else
 315                         break;
 316 #ifdef CONFIG_BF535
 317         /* 0x29 - Instruction fetch access error (535 only) */
 318         case VEC_ISTRU_VL:      /* ADSP-BF535 only (MH) */
 319                 info.si_code = BUS_OPFETCH;
 320                 sig = SIGBUS;
 321                 printk(KERN_EMERG "BF535: VEC_ISTRU_VL\n");
 322                 CHK_DEBUGGER_TRAP();
 323                 break;
 324 #else
 325         /* 0x29 - Reserved, Caught by default */
 326 #endif
 327         /* 0x2A - Instruction fetch misaligned, handled here */
 328         case VEC_MISALI_I:
 329                 info.si_code = BUS_ADRALN;
 330                 sig = SIGBUS;
 331                 printk(KERN_EMERG EXC_0x2A);
 332                 CHK_DEBUGGER_TRAP();
 333                 break;
 334         /* 0x2B - Instruction CPLB protection Violation,
 335                 handled in _cplb_hdr */
 336         case VEC_CPLB_I_VL:
 337                 info.si_code = ILL_CPLB_VI;
 338                 sig = SIGILL;
 339                 printk(KERN_EMERG EXC_0x2B);
 340                 CHK_DEBUGGER_TRAP();
 341                 break;
 342         /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */
 343         case VEC_CPLB_I_M:
 344                 info.si_code = ILL_CPLB_MISS;
 345                 sig = SIGBUS;
 346                 printk(KERN_EMERG EXC_0x2C);
 347                 CHK_DEBUGGER_TRAP();
 348                 break;
 349         /* 0x2D - Instruction CPLB Multiple Hits, handled here */
 350         case VEC_CPLB_I_MHIT:
 351                 info.si_code = ILL_CPLB_MULHIT;
 352 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
 353                 sig = SIGSEGV;
 354                 printk(KERN_EMERG "\n\nJump to address 0 - 0x0fff\n");
 355 #else
 356                 sig = SIGILL;
 357                 printk(KERN_EMERG EXC_0x2D);
 358 #endif
 359                 CHK_DEBUGGER_TRAP();
 360                 break;
 361         /* 0x2E - Illegal use of Supervisor Resource, handled here */
 362         case VEC_ILL_RES:
 363                 info.si_code = ILL_PRVOPC;
 364                 sig = SIGILL;
 365                 printk(KERN_EMERG EXC_0x2E);
 366                 CHK_DEBUGGER_TRAP();
 367                 break;
 368         /* 0x2F - Reserved, Caught by default */
 369         /* 0x30 - Reserved, Caught by default */
 370         /* 0x31 - Reserved, Caught by default */
 371         /* 0x32 - Reserved, Caught by default */
 372         /* 0x33 - Reserved, Caught by default */
 373         /* 0x34 - Reserved, Caught by default */
 374         /* 0x35 - Reserved, Caught by default */
 375         /* 0x36 - Reserved, Caught by default */
 376         /* 0x37 - Reserved, Caught by default */
 377         /* 0x38 - Reserved, Caught by default */
 378         /* 0x39 - Reserved, Caught by default */
 379         /* 0x3A - Reserved, Caught by default */
 380         /* 0x3B - Reserved, Caught by default */
 381         /* 0x3C - Reserved, Caught by default */
 382         /* 0x3D - Reserved, Caught by default */
 383         /* 0x3E - Reserved, Caught by default */
 384         /* 0x3F - Reserved, Caught by default */
 385         default:
 386                 info.si_code = TRAP_ILLTRAP;
 387                 sig = SIGTRAP;
 388                 printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n",
 389                         (fp->seqstat & SEQSTAT_EXCAUSE));
 390                 CHK_DEBUGGER_TRAP();
 391                 break;
 392         }
 393
 394         info.si_signo = sig;
 395         info.si_errno = 0;
 396         info.si_addr = (void *)fp->pc;
 397         force_sig_info(sig, &info, current);
 398         if (sig != 0 && sig != SIGTRAP) {
 399                 unsigned long stack;
 400                 dump_bfin_regs(fp, (void *)fp->retx);
 401                 dump_bfin_trace_buffer();
 402                 show_stack(current, &stack);
 403                 if (current->mm == NULL)
 404                         panic("Kernel exception");
 405         }
 406
 407         /* if the address that we are about to return to is not valid, set it
 408          * to a valid address, if we have a current application or panic
 409          */
 410         if (!(fp->pc <= physical_mem_end
 411 #if L1_CODE_LENGTH != 0
 412             || (fp->pc >= L1_CODE_START &&
 413                 fp->pc <= (L1_CODE_START + L1_CODE_LENGTH))
 414 #endif
 415         )) {
 416                 if (current->mm) {
 417                         fp->pc = current->mm->start_code;
 418                 } else {
 419                         printk(KERN_EMERG
 420                                 "I can't return to memory that doesn't exist"
 421                                 " - bad things happen\n");
 422                         panic("Help - I've fallen and can't get up\n");
 423                 }
 424         }
 425
 426         trace_buffer_restore(j);
 427         return;
 428 }
 429
 430 /* Typical exception handling routines  */
 431
 432 void dump_bfin_trace_buffer(void)
 433 {
 434         int tflags;
 435         trace_buffer_save(tflags);
 436
 437         if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
 438                 int i;
 439                 printk(KERN_EMERG "Hardware Trace:\n");
 440                 for (i = 0; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
 441                         printk(KERN_EMERG "%2i Target : ", i);
 442                         printk_address((unsigned long)bfin_read_TBUF());
 443                         printk("\n" KERN_EMERG "   Source : ");
 444                         printk_address((unsigned long)bfin_read_TBUF());
 445                         printk("\n");
 446                 }
 447         }
 448
 449         trace_buffer_restore(tflags);
 450 }
 451 EXPORT_SYMBOL(dump_bfin_trace_buffer);
 452
 453 static void show_trace(struct task_struct *tsk, unsigned long *sp)
 454 {
 455         unsigned long addr;
 456
 457         printk("\nCall Trace:");
 458 #ifdef CONFIG_KALLSYMS
 459         printk("\n");
 460 #endif
 461
 462         while (!kstack_end(sp)) {
 463                 addr = *sp++;
 464                 /*
 465                  * If the address is either in the text segment of the
 466                  * kernel, or in the region which contains vmalloc'ed
 467                  * memory, it *may* be the address of a calling
 468                  * routine; if so, print it so that someone tracing
 469                  * down the cause of the crash will be able to figure
 470                  * out the call path that was taken.
 471                  */
 472                 if (kernel_text_address(addr))
 473                         print_ip_sym(addr);
 474         }
 475
 476         printk("\n");
 477 }
 478
 479 void show_stack(struct task_struct *task, unsigned long *stack)
 480 {
 481         unsigned long *endstack, addr;
 482         int i;
 483
 484         /* Cannot call dump_bfin_trace_buffer() here as show_stack() is
 485          * called externally in some places in the kernel.
 486          */
 487
 488         if (!stack) {
 489                 if (task)
 490                         stack = (unsigned long *)task->thread.ksp;
 491                 else
 492                         stack = (unsigned long *)&stack;
 493         }
 494
 495         addr = (unsigned long)stack;
 496         endstack = (unsigned long *)PAGE_ALIGN(addr);
 497
 498         printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack);
 499         for (i = 0; i < kstack_depth_to_print; i++) {
 500                 if (stack + 1 > endstack)
 501                         break;
 502                 if (i % 8 == 0)
 503                         printk("\n" KERN_EMERG "       ");
 504                 printk(" %08lx", *stack++);
 505         }
 506
 507         show_trace(task, stack);
 508 }
 509
 510 void dump_stack(void)
 511 {
 512         unsigned long stack;
 513         int tflags;
 514         trace_buffer_save(tflags);
 515         dump_bfin_trace_buffer();
 516         show_stack(current, &stack);
 517         trace_buffer_restore(tflags);
 518 }
 519
 520 EXPORT_SYMBOL(dump_stack);
 521
 522 void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
 523 {
 524         if (current->pid) {
 525                 printk(KERN_EMERG "\n" KERN_EMERG "CURRENT PROCESS:\n"
 526                         KERN_EMERG "\n");
 527                 printk(KERN_EMERG "COMM=%s PID=%d\n",
 528                         current->comm, current->pid);
 529         } else {
 530                 printk
 531                     (KERN_EMERG "\n" KERN_EMERG
 532                      "No Valid pid - Either things are really messed up,"
 533                      " or you are in the kernel\n");
 534         }
 535
 536         if (current->mm) {
 537                 printk(KERN_EMERG "TEXT = 0x%p-0x%p  DATA = 0x%p-0x%p\n"
 538                        KERN_EMERG "BSS = 0x%p-0x%p   USER-STACK = 0x%p\n"
 539                        KERN_EMERG "\n",
 540                        (void *)current->mm->start_code,
 541                        (void *)current->mm->end_code,
 542                        (void *)current->mm->start_data,
 543                        (void *)current->mm->end_data,
 544                        (void *)current->mm->end_data,
 545                        (void *)current->mm->brk,
 546                        (void *)current->mm->start_stack);
 547         }
 548
 549         printk(KERN_EMERG "return address: [0x%p]; contents of:", retaddr);
 550         if (retaddr != 0 && retaddr <= (void *)physical_mem_end
 551 #if L1_CODE_LENGTH != 0
 552             /* FIXME: Copy the code out of L1 Instruction SRAM through dma
 553                memcpy.  */
 554             && !(retaddr >= (void *)L1_CODE_START
 555                  && retaddr < (void *)(L1_CODE_START + L1_CODE_LENGTH))
 556 #endif
 557         ) {
 558                 int i = ((unsigned int)retaddr & 0xFFFFFFF0) - 32;
 559                 unsigned short x = 0;
 560                 for (; i < ((unsigned int)retaddr & 0xFFFFFFF0) + 32; i += 2) {
 561                         if (!(i & 0xF))
 562                                 printk(KERN_EMERG "\n" KERN_EMERG
 563                                         "0x%08x: ", i);
 564
 565                         if (get_user(x, (unsigned short *)i))
 566                                 break;
 567 #ifndef CONFIG_DEBUG_HWERR
 568                         /* If one of the last few instructions was a STI
 569                          * it is likely that the error occured awhile ago
 570                          * and we just noticed
 571                          */
 572                         if (x >= 0x0040 && x <= 0x0047 && i <= 0)
 573                                 panic("\n\nWARNING : You should reconfigure"
 574                                         " the kernel to turn on\n"
 575                                         " 'Hardware error interrupt"
 576                                         " debugging'\n"
 577                                         " The rest of this error"
 578                                         " is meanless\n");
 579 #endif
 580                         if (i == (unsigned int)retaddr)
 581                                 printk("[%04x]", x);
 582                         else
 583                                 printk(" %04x ", x);
 584                 }
 585                 printk("\n" KERN_EMERG "\n");
 586         } else
 587                 printk(KERN_EMERG
 588                         "Cannot look at the [PC] for it is"
 589                         "in unreadable L1 SRAM - sorry\n");
 590
 591
 592         printk(KERN_EMERG
 593                 "RETE:  %08lx  RETN: %08lx  RETX: %08lx  RETS: %08lx\n",
 594                 fp->rete, fp->retn, fp->retx, fp->rets);
 595         printk(KERN_EMERG "IPEND: %04lx  SYSCFG: %04lx\n",
 596                 fp->ipend, fp->syscfg);
 597         printk(KERN_EMERG "SEQSTAT: %08lx    SP: %08lx\n",
 598                 (long)fp->seqstat, (long)fp);
 599         printk(KERN_EMERG "R0: %08lx    R1: %08lx    R2: %08lx    R3: %08lx\n",
 600                 fp->r0, fp->r1, fp->r2, fp->r3);
 601         printk(KERN_EMERG "R4: %08lx    R5: %08lx    R6: %08lx    R7: %08lx\n",
 602                 fp->r4, fp->r5, fp->r6, fp->r7);
 603         printk(KERN_EMERG "P0: %08lx    P1: %08lx    P2: %08lx    P3: %08lx\n",
 604                 fp->p0, fp->p1, fp->p2, fp->p3);
 605         printk(KERN_EMERG
 606                 "P4: %08lx    P5: %08lx    FP: %08lx\n",
 607                 fp->p4, fp->p5, fp->fp);
 608         printk(KERN_EMERG
 609                 "A0.w: %08lx    A0.x: %08lx    A1.w: %08lx    A1.x: %08lx\n",
 610                 fp->a0w, fp->a0x, fp->a1w, fp->a1x);
 611
 612         printk(KERN_EMERG "LB0: %08lx  LT0: %08lx  LC0: %08lx\n",
 613                 fp->lb0, fp->lt0, fp->lc0);
 614         printk(KERN_EMERG "LB1: %08lx  LT1: %08lx  LC1: %08lx\n",
 615                 fp->lb1, fp->lt1, fp->lc1);
 616         printk(KERN_EMERG "B0: %08lx  L0: %08lx  M0: %08lx  I0: %08lx\n",
 617                 fp->b0, fp->l0, fp->m0, fp->i0);
 618         printk(KERN_EMERG "B1: %08lx  L1: %08lx  M1: %08lx  I1: %08lx\n",
 619                 fp->b1, fp->l1, fp->m1, fp->i1);
 620         printk(KERN_EMERG "B2: %08lx  L2: %08lx  M2: %08lx  I2: %08lx\n",
 621                 fp->b2, fp->l2, fp->m2, fp->i2);
 622         printk(KERN_EMERG "B3: %08lx  L3: %08lx  M3: %08lx  I3: %08lx\n",
 623                 fp->b3, fp->l3, fp->m3, fp->i3);
 624
 625         printk(KERN_EMERG "\n" KERN_EMERG "USP: %08lx   ASTAT: %08lx\n",
 626                 rdusp(), fp->astat);
 627         if ((long)fp->seqstat & SEQSTAT_EXCAUSE) {
 628                 printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n",
 629                         (void *)bfin_read_DCPLB_FAULT_ADDR());
 630                 printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n",
 631                         (void *)bfin_read_ICPLB_FAULT_ADDR());
 632         }
 633
 634         printk("\n\n");
 635 }
 636
 637 #ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
 638 asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
 639 #endif
 640
 641 asmlinkage int sys_bfin_spinlock(int *spinlock)
 642 {
 643         int ret = 0;
 644         int tmp = 0;
 645
 646         local_irq_disable();
 647         ret = get_user(tmp, spinlock);
 648         if (ret == 0) {
 649                 if (tmp)
 650                         ret = 1;
 651                 tmp = 1;
 652                 put_user(tmp, spinlock);
 653         }
 654         local_irq_enable();
 655         return ret;
 656 }
 657
 658 void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
 659 {
 660         switch (cplb_panic) {
 661         case CPLB_NO_UNLOCKED:
 662                 printk(KERN_EMERG "All CPLBs are locked\n");
 663                 break;
 664         case CPLB_PROT_VIOL:
 665                 return;
 666         case CPLB_NO_ADDR_MATCH:
 667                 return;
 668         case CPLB_UNKNOWN_ERR:
 669                 printk(KERN_EMERG "Unknown CPLB Exception\n");
 670                 break;
 671         }
 672
 673         printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void *)bfin_read_DCPLB_FAULT_ADDR());
 674         printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void *)bfin_read_ICPLB_FAULT_ADDR());
 675         dump_bfin_regs(fp, (void *)fp->retx);
 676         dump_stack();
 677         panic("Unrecoverable event\n");
 678 }