Blackfin arch: spelling fixes
[linux-2.6.git] / 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 <linux/interrupt.h>
37 #include <linux/module.h>
38 #include <linux/kallsyms.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 #define trace_buffer_save(x) \
135         do { \
136                 (x) = bfin_read_TBUFCTL(); \
137                 bfin_write_TBUFCTL((x) & ~TBUFEN); \
138         } while (0)
139 #define trace_buffer_restore(x) \
140         do { \
141                 bfin_write_TBUFCTL((x));        \
142         } while (0)
143
144 asmlinkage void trap_c(struct pt_regs *fp)
145 {
146         int j, sig = 0;
147         siginfo_t info;
148         unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
149
150 #ifdef CONFIG_KGDB
151 # define CHK_DEBUGGER_TRAP() do { CHK_DEBUGGER(trapnr, sig, info.si_code, fp,); } while (0)
152 # define CHK_DEBUGGER_TRAP_MAYBE() do { if (kgdb_connected) CHK_DEBUGGER_TRAP(); } while (0)
153 #else
154 # define CHK_DEBUGGER_TRAP() do { } while (0)
155 # define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0)
156 #endif
157
158         trace_buffer_save(j);
159
160         /* trap_c() will be called for exceptions. During exceptions
161          * processing, the pc value should be set with retx value.
162          * With this change we can cleanup some code in signal.c- TODO
163          */
164         fp->orig_pc = fp->retx;
165         /* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n",
166                 trapnr, fp->ipend, fp->pc, fp->retx); */
167
168         /* send the appropriate signal to the user program */
169         switch (trapnr) {
170
171         /* This table works in conjuction with the one in ./mach-common/entry.S
172          * Some exceptions are handled there (in assembly, in exception space)
173          * Some are handled here, (in C, in interrupt space)
174          * Some, like CPLB, are handled in both, where the normal path is
175          * handled in assembly/exception space, and the error path is handled
176          * here
177          */
178
179         /* 0x00 - Linux Syscall, getting here is an error */
180         /* 0x01 - userspace gdb breakpoint, handled here */
181         case VEC_EXCPT01:
182                 info.si_code = TRAP_ILLTRAP;
183                 sig = SIGTRAP;
184                 CHK_DEBUGGER_TRAP_MAYBE();
185                 /* Check if this is a breakpoint in kernel space */
186                 if (fp->ipend & 0xffc0)
187                         return;
188                 else
189                         break;
190 #ifdef CONFIG_KGDB
191         case VEC_EXCPT02 :               /* gdb connection */
192                 info.si_code = TRAP_ILLTRAP;
193                 sig = SIGTRAP;
194                 CHK_DEBUGGER_TRAP();
195                 return;
196 #else
197         /* 0x02 - User Defined, Caught by default */
198 #endif
199         /* 0x03  - Atomic test and set */
200         case VEC_EXCPT03:
201                 info.si_code = SEGV_STACKFLOW;
202                 sig = SIGSEGV;
203                 printk(KERN_EMERG EXC_0x03);
204                 CHK_DEBUGGER_TRAP();
205                 break;
206         /* 0x04 - spinlock - handled by _ex_spinlock,
207                 getting here is an error */
208         /* 0x05 - User Defined, Caught by default */
209         /* 0x06 - User Defined, Caught by default */
210         /* 0x07 - User Defined, Caught by default */
211         /* 0x08 - User Defined, Caught by default */
212         /* 0x09 - User Defined, Caught by default */
213         /* 0x0A - User Defined, Caught by default */
214         /* 0x0B - User Defined, Caught by default */
215         /* 0x0C - User Defined, Caught by default */
216         /* 0x0D - User Defined, Caught by default */
217         /* 0x0E - User Defined, Caught by default */
218         /* 0x0F - User Defined, Caught by default */
219         /* 0x10 HW Single step, handled here */
220         case VEC_STEP:
221                 info.si_code = TRAP_STEP;
222                 sig = SIGTRAP;
223                 CHK_DEBUGGER_TRAP_MAYBE();
224                 /* Check if this is a single step in kernel space */
225                 if (fp->ipend & 0xffc0)
226                         return;
227                 else
228                         break;
229         /* 0x11 - Trace Buffer Full, handled here */
230         case VEC_OVFLOW:
231                 info.si_code = TRAP_TRACEFLOW;
232                 sig = SIGTRAP;
233                 printk(KERN_EMERG EXC_0x11);
234                 CHK_DEBUGGER_TRAP();
235                 break;
236         /* 0x12 - Reserved, Caught by default */
237         /* 0x13 - Reserved, Caught by default */
238         /* 0x14 - Reserved, Caught by default */
239         /* 0x15 - Reserved, Caught by default */
240         /* 0x16 - Reserved, Caught by default */
241         /* 0x17 - Reserved, Caught by default */
242         /* 0x18 - Reserved, Caught by default */
243         /* 0x19 - Reserved, Caught by default */
244         /* 0x1A - Reserved, Caught by default */
245         /* 0x1B - Reserved, Caught by default */
246         /* 0x1C - Reserved, Caught by default */
247         /* 0x1D - Reserved, Caught by default */
248         /* 0x1E - Reserved, Caught by default */
249         /* 0x1F - Reserved, Caught by default */
250         /* 0x20 - Reserved, Caught by default */
251         /* 0x21 - Undefined Instruction, handled here */
252         case VEC_UNDEF_I:
253                 info.si_code = ILL_ILLOPC;
254                 sig = SIGILL;
255                 printk(KERN_EMERG EXC_0x21);
256                 CHK_DEBUGGER_TRAP();
257                 break;
258         /* 0x22 - Illegal Instruction Combination, handled here */
259         case VEC_ILGAL_I:
260                 info.si_code = ILL_ILLPARAOP;
261                 sig = SIGILL;
262                 printk(KERN_EMERG EXC_0x22);
263                 CHK_DEBUGGER_TRAP();
264                 break;
265         /* 0x23 - Data CPLB Protection Violation,
266                  normal case is handled in _cplb_hdr */
267         case VEC_CPLB_VL:
268                 info.si_code = ILL_CPLB_VI;
269                 sig = SIGILL;
270                 printk(KERN_EMERG EXC_0x23);
271                 CHK_DEBUGGER_TRAP();
272                 break;
273         /* 0x24 - Data access misaligned, handled here */
274         case VEC_MISALI_D:
275                 info.si_code = BUS_ADRALN;
276                 sig = SIGBUS;
277                 printk(KERN_EMERG EXC_0x24);
278                 CHK_DEBUGGER_TRAP();
279                 break;
280         /* 0x25 - Unrecoverable Event, handled here */
281         case VEC_UNCOV:
282                 info.si_code = ILL_ILLEXCPT;
283                 sig = SIGILL;
284                 printk(KERN_EMERG EXC_0x25);
285                 CHK_DEBUGGER_TRAP();
286                 break;
287         /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr,
288                 error case is handled here */
289         case VEC_CPLB_M:
290                 info.si_code = BUS_ADRALN;
291                 sig = SIGBUS;
292                 printk(KERN_EMERG EXC_0x26);
293                 CHK_DEBUGGER_TRAP();
294                 break;
295         /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
296         case VEC_CPLB_MHIT:
297                 info.si_code = ILL_CPLB_MULHIT;
298 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
299                 sig = SIGSEGV;
300                 printk(KERN_EMERG "\n\nNULL pointer access (probably)\n");
301 #else
302                 sig = SIGILL;
303                 printk(KERN_EMERG EXC_0x27);
304 #endif
305                 CHK_DEBUGGER_TRAP();
306                 break;
307         /* 0x28 - Emulation Watchpoint, handled here */
308         case VEC_WATCH:
309                 info.si_code = TRAP_WATCHPT;
310                 sig = SIGTRAP;
311                 pr_debug(EXC_0x28);
312                 CHK_DEBUGGER_TRAP_MAYBE();
313                 /* Check if this is a watchpoint in kernel space */
314                 if (fp->ipend & 0xffc0)
315                         return;
316                 else
317                         break;
318 #ifdef CONFIG_BF535
319         /* 0x29 - Instruction fetch access error (535 only) */
320         case VEC_ISTRU_VL:      /* ADSP-BF535 only (MH) */
321                 info.si_code = BUS_OPFETCH;
322                 sig = SIGBUS;
323                 printk(KERN_EMERG "BF535: VEC_ISTRU_VL\n");
324                 CHK_DEBUGGER_TRAP();
325                 break;
326 #else
327         /* 0x29 - Reserved, Caught by default */
328 #endif
329         /* 0x2A - Instruction fetch misaligned, handled here */
330         case VEC_MISALI_I:
331                 info.si_code = BUS_ADRALN;
332                 sig = SIGBUS;
333                 printk(KERN_EMERG EXC_0x2A);
334                 CHK_DEBUGGER_TRAP();
335                 break;
336         /* 0x2B - Instruction CPLB protection Violation,
337                 handled in _cplb_hdr */
338         case VEC_CPLB_I_VL:
339                 info.si_code = ILL_CPLB_VI;
340                 sig = SIGILL;
341                 printk(KERN_EMERG EXC_0x2B);
342                 CHK_DEBUGGER_TRAP();
343                 break;
344         /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */
345         case VEC_CPLB_I_M:
346                 info.si_code = ILL_CPLB_MISS;
347                 sig = SIGBUS;
348                 printk(KERN_EMERG EXC_0x2C);
349                 CHK_DEBUGGER_TRAP();
350                 break;
351         /* 0x2D - Instruction CPLB Multiple Hits, handled here */
352         case VEC_CPLB_I_MHIT:
353                 info.si_code = ILL_CPLB_MULHIT;
354 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
355                 sig = SIGSEGV;
356                 printk(KERN_EMERG "\n\nJump to address 0 - 0x0fff\n");
357 #else
358                 sig = SIGILL;
359                 printk(KERN_EMERG EXC_0x2D);
360 #endif
361                 CHK_DEBUGGER_TRAP();
362                 break;
363         /* 0x2E - Illegal use of Supervisor Resource, handled here */
364         case VEC_ILL_RES:
365                 info.si_code = ILL_PRVOPC;
366                 sig = SIGILL;
367                 printk(KERN_EMERG EXC_0x2E);
368                 CHK_DEBUGGER_TRAP();
369                 break;
370         /* 0x2F - Reserved, Caught by default */
371         /* 0x30 - Reserved, Caught by default */
372         /* 0x31 - Reserved, Caught by default */
373         /* 0x32 - Reserved, Caught by default */
374         /* 0x33 - Reserved, Caught by default */
375         /* 0x34 - Reserved, Caught by default */
376         /* 0x35 - Reserved, Caught by default */
377         /* 0x36 - Reserved, Caught by default */
378         /* 0x37 - Reserved, Caught by default */
379         /* 0x38 - Reserved, Caught by default */
380         /* 0x39 - Reserved, Caught by default */
381         /* 0x3A - Reserved, Caught by default */
382         /* 0x3B - Reserved, Caught by default */
383         /* 0x3C - Reserved, Caught by default */
384         /* 0x3D - Reserved, Caught by default */
385         /* 0x3E - Reserved, Caught by default */
386         /* 0x3F - Reserved, Caught by default */
387         default:
388                 info.si_code = TRAP_ILLTRAP;
389                 sig = SIGTRAP;
390                 printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n",
391                         (fp->seqstat & SEQSTAT_EXCAUSE));
392                 CHK_DEBUGGER_TRAP();
393                 break;
394         }
395
396         info.si_signo = sig;
397         info.si_errno = 0;
398         info.si_addr = (void *)fp->pc;
399         force_sig_info(sig, &info, current);
400         if (sig != 0 && sig != SIGTRAP) {
401                 unsigned long stack;
402                 dump_bfin_regs(fp, (void *)fp->retx);
403                 dump_bfin_trace_buffer();
404                 show_stack(current, &stack);
405                 if (current->mm == NULL)
406                         panic("Kernel exception");
407         }
408
409         /* if the address that we are about to return to is not valid, set it
410          * to a valid address, if we have a current application or panic
411          */
412         if (!(fp->pc <= physical_mem_end
413 #if L1_CODE_LENGTH != 0
414             || (fp->pc >= L1_CODE_START &&
415                 fp->pc <= (L1_CODE_START + L1_CODE_LENGTH))
416 #endif
417         )) {
418                 if (current->mm) {
419                         fp->pc = current->mm->start_code;
420                 } else {
421                         printk(KERN_EMERG "I can't return to memory that doesn't exist - 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("\nCURRENT PROCESS:\n\n");
526                 printk("COMM=%s PID=%d\n", current->comm, current->pid);
527         } else {
528                 printk
529                     ("\nNo Valid pid - Either things are really messed up, or you are in the kernel\n");
530         }
531
532         if (current->mm) {
533                 printk("TEXT = 0x%p-0x%p  DATA = 0x%p-0x%p\n"
534                        "BSS = 0x%p-0x%p   USER-STACK = 0x%p\n\n",
535                        (void*)current->mm->start_code,
536                        (void*)current->mm->end_code,
537                        (void*)current->mm->start_data,
538                        (void*)current->mm->end_data,
539                        (void*)current->mm->end_data,
540                        (void*)current->mm->brk,
541                        (void*)current->mm->start_stack);
542         }
543
544         printk("return address: 0x%p; contents of [PC-16...PC+8]:\n", retaddr);
545         if (retaddr != 0 && retaddr <= (void*)physical_mem_end
546 #if L1_CODE_LENGTH != 0
547             /* FIXME: Copy the code out of L1 Instruction SRAM through dma
548                memcpy.  */
549             && !(retaddr >= (void*)L1_CODE_START
550                  && retaddr < (void*)(L1_CODE_START + L1_CODE_LENGTH))
551 #endif
552         ) {
553                 int i = 0;
554                 unsigned short x = 0;
555                 for (i = -16; i < 8; i++) {
556                         if (get_user(x, (unsigned short *)retaddr + i))
557                                 break;
558 #ifndef CONFIG_DEBUG_HWERR
559                         /* If one of the last few instructions was a STI
560                          * it is likely that the error occured awhile ago
561                          * and we just noticed
562                          */
563                         if (x >= 0x0040 && x <= 0x0047 && i <= 0)
564                                 panic("\n\nWARNING : You should reconfigure the kernel to turn on\n"
565                                         " 'Hardware error interrupt debugging'\n"
566                                         " The rest of this error is meanless\n");
567 #endif
568
569                         if (i == -8)
570                                 printk("\n");
571                         if (i == 0)
572                                 printk("X\n");
573                         printk("%04x ", x);
574                 }
575         } else
576                 printk("Cannot look at the [PC] for it is in unreadable L1 SRAM - sorry\n");
577
578         printk("\n\n");
579
580         printk("RETE:  %08lx  RETN: %08lx  RETX: %08lx  RETS: %08lx\n",
581                fp->rete, fp->retn, fp->retx, fp->rets);
582         printk("IPEND: %04lx  SYSCFG: %04lx\n", fp->ipend, fp->syscfg);
583         printk("SEQSTAT: %08lx    SP: %08lx\n", (long)fp->seqstat, (long)fp);
584         printk("R0: %08lx    R1: %08lx    R2: %08lx    R3: %08lx\n",
585                fp->r0, fp->r1, fp->r2, fp->r3);
586         printk("R4: %08lx    R5: %08lx    R6: %08lx    R7: %08lx\n",
587                fp->r4, fp->r5, fp->r6, fp->r7);
588         printk("P0: %08lx    P1: %08lx    P2: %08lx    P3: %08lx\n",
589                fp->p0, fp->p1, fp->p2, fp->p3);
590         printk("P4: %08lx    P5: %08lx    FP: %08lx\n", fp->p4, fp->p5, fp->fp);
591         printk("A0.w: %08lx    A0.x: %08lx    A1.w: %08lx    A1.x: %08lx\n",
592                fp->a0w, fp->a0x, fp->a1w, fp->a1x);
593
594         printk("LB0: %08lx  LT0: %08lx  LC0: %08lx\n", fp->lb0, fp->lt0,
595                fp->lc0);
596         printk("LB1: %08lx  LT1: %08lx  LC1: %08lx\n", fp->lb1, fp->lt1,
597                fp->lc1);
598         printk("B0: %08lx  L0: %08lx  M0: %08lx  I0: %08lx\n", fp->b0, fp->l0,
599                fp->m0, fp->i0);
600         printk("B1: %08lx  L1: %08lx  M1: %08lx  I1: %08lx\n", fp->b1, fp->l1,
601                fp->m1, fp->i1);
602         printk("B2: %08lx  L2: %08lx  M2: %08lx  I2: %08lx\n", fp->b2, fp->l2,
603                fp->m2, fp->i2);
604         printk("B3: %08lx  L3: %08lx  M3: %08lx  I3: %08lx\n", fp->b3, fp->l3,
605                fp->m3, fp->i3);
606
607         printk("\nUSP: %08lx   ASTAT: %08lx\n", rdusp(), fp->astat);
608         if ((long)fp->seqstat & SEQSTAT_EXCAUSE) {
609                 printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void*)bfin_read_DCPLB_FAULT_ADDR());
610                 printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void*)bfin_read_ICPLB_FAULT_ADDR());
611         }
612
613         printk("\n\n");
614 }
615
616 #ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
617 asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
618 #endif
619
620 asmlinkage int sys_bfin_spinlock(int *spinlock)
621 {
622         int ret = 0;
623         int tmp = 0;
624
625         local_irq_disable();
626         ret = get_user(tmp, spinlock);
627         if (ret == 0) {
628                 if (tmp)
629                         ret = 1;
630                 tmp = 1;
631                 put_user(tmp, spinlock);
632         }
633         local_irq_enable();
634         return ret;
635 }
636
637 void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
638 {
639         switch (cplb_panic) {
640         case CPLB_NO_UNLOCKED:
641                 printk(KERN_EMERG "All CPLBs are locked\n");
642                 break;
643         case CPLB_PROT_VIOL:
644                 return;
645         case CPLB_NO_ADDR_MATCH:
646                 return;
647         case CPLB_UNKNOWN_ERR:
648                 printk(KERN_EMERG "Unknown CPLB Exception\n");
649                 break;
650         }
651
652         printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void*)bfin_read_DCPLB_FAULT_ADDR());
653         printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void*)bfin_read_ICPLB_FAULT_ADDR());
654         dump_bfin_regs(fp, (void *)fp->retx);
655         dump_stack();
656         panic("Unrecoverable event\n");
657 }