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