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-rw-r--r--arch/blackfin/kernel/traps.c649
1 files changed, 649 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
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+++ b/arch/blackfin/kernel/traps.c
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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 <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 */
46void __init trap_init(void)
47{
48 CSYNC();
49 bfin_write_EVT3(trap);
50 CSYNC();
51}
52
53asmlinkage void trap_c(struct pt_regs *fp);
54
55int kstack_depth_to_print = 48;
56
57static int printk_address(unsigned long address)
58{
59 struct vm_list_struct *vml;
60 struct task_struct *p;
61 struct mm_struct *mm;
62
63#ifdef CONFIG_KALLSYMS
64 unsigned long offset = 0, symsize;
65 const char *symname;
66 char *modname;
67 char *delim = ":";
68 char namebuf[128];
69
70 /* look up the address and see if we are in kernel space */
71 symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
72
73 if (symname) {
74 /* yeah! kernel space! */
75 if (!modname)
76 modname = delim = "";
77 return printk("<0x%p> { %s%s%s%s + 0x%lx }",
78 (void*)address, delim, modname, delim, symname,
79 (unsigned long)offset);
80
81 }
82#endif
83
84 /* looks like we're off in user-land, so let's walk all the
85 * mappings of all our processes and see if we can't be a whee
86 * bit more specific
87 */
88 write_lock_irq(&tasklist_lock);
89 for_each_process(p) {
90 mm = get_task_mm(p);
91 if (!mm)
92 continue;
93
94 vml = mm->context.vmlist;
95 while (vml) {
96 struct vm_area_struct *vma = vml->vma;
97
98 if (address >= vma->vm_start && address < vma->vm_end) {
99 char *name = p->comm;
100 struct file *file = vma->vm_file;
101 if (file) {
102 char _tmpbuf[256];
103 name = d_path(file->f_dentry,
104 file->f_vfsmnt,
105 _tmpbuf,
106 sizeof(_tmpbuf));
107 }
108
109 write_unlock_irq(&tasklist_lock);
110 return printk("<0x%p> [ %s + 0x%lx ]",
111 (void*)address, name,
112 (unsigned long)
113 ((address - vma->vm_start) +
114 (vma->vm_pgoff << PAGE_SHIFT)));
115 }
116
117 vml = vml->next;
118 }
119 }
120 write_unlock_irq(&tasklist_lock);
121
122 /* we were unable to find this address anywhere */
123 return printk("[<0x%p>]", (void*)address);
124}
125
126#define trace_buffer_save(x) \
127 do { \
128 (x) = bfin_read_TBUFCTL(); \
129 bfin_write_TBUFCTL((x) & ~TBUFEN); \
130 } while (0)
131#define trace_buffer_restore(x) \
132 do { \
133 bfin_write_TBUFCTL((x)); \
134 } while (0)
135
136asmlinkage void trap_c(struct pt_regs *fp)
137{
138 int j, sig = 0;
139 siginfo_t info;
140 unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
141
142#ifdef CONFIG_KGDB
143# define CHK_DEBUGGER_TRAP() do { CHK_DEBUGGER(trapnr, sig, info.si_code, fp,); } while (0)
144# define CHK_DEBUGGER_TRAP_MAYBE() do { if (kgdb_connected) CHK_DEBUGGER_TRAP(); } while (0)
145#else
146# define CHK_DEBUGGER_TRAP() do { } while (0)
147# define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0)
148#endif
149
150 trace_buffer_save(j);
151
152 /* trap_c() will be called for exceptions. During exceptions
153 * processing, the pc value should be set with retx value.
154 * With this change we can cleanup some code in signal.c- TODO
155 */
156 fp->orig_pc = fp->retx;
157 /* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n",
158 trapnr, fp->ipend, fp->pc, fp->retx); */
159
160 /* send the appropriate signal to the user program */
161 switch (trapnr) {
162
163 /* This table works in conjuction with the one in ./mach-common/entry.S
164 * Some exceptions are handled there (in assembly, in exception space)
165 * Some are handled here, (in C, in interrupt space)
166 * Some, like CPLB, are handled in both, where the normal path is
167 * handled in assembly/exception space, and the error path is handled
168 * here
169 */
170
171 /* 0x00 - Linux Syscall, getting here is an error */
172 /* 0x01 - userspace gdb breakpoint, handled here */
173 case VEC_EXCPT01:
174 info.si_code = TRAP_ILLTRAP;
175 sig = SIGTRAP;
176 CHK_DEBUGGER_TRAP_MAYBE();
177 /* Check if this is a breakpoint in kernel space */
178 if (fp->ipend & 0xffc0)
179 return;
180 else
181 break;
182#ifdef CONFIG_KGDB
183 case VEC_EXCPT02 : /* gdb connection */
184 info.si_code = TRAP_ILLTRAP;
185 sig = SIGTRAP;
186 CHK_DEBUGGER_TRAP();
187 return;
188#else
189 /* 0x02 - User Defined, Caught by default */
190#endif
191 /* 0x03 - Atomic test and set */
192 case VEC_EXCPT03:
193 info.si_code = SEGV_STACKFLOW;
194 sig = SIGSEGV;
195 printk(KERN_EMERG EXC_0x03);
196 CHK_DEBUGGER_TRAP();
197 break;
198 /* 0x04 - spinlock - handled by _ex_spinlock,
199 getting here is an error */
200 /* 0x05 - User Defined, Caught by default */
201 /* 0x06 - User Defined, Caught by default */
202 /* 0x07 - User Defined, Caught by default */
203 /* 0x08 - User Defined, Caught by default */
204 /* 0x09 - User Defined, Caught by default */
205 /* 0x0A - User Defined, Caught by default */
206 /* 0x0B - User Defined, Caught by default */
207 /* 0x0C - User Defined, Caught by default */
208 /* 0x0D - User Defined, Caught by default */
209 /* 0x0E - User Defined, Caught by default */
210 /* 0x0F - User Defined, Caught by default */
211 /* 0x10 HW Single step, handled here */
212 case VEC_STEP:
213 info.si_code = TRAP_STEP;
214 sig = SIGTRAP;
215 CHK_DEBUGGER_TRAP_MAYBE();
216 /* Check if this is a single step in kernel space */
217 if (fp->ipend & 0xffc0)
218 return;
219 else
220 break;
221 /* 0x11 - Trace Buffer Full, handled here */
222 case VEC_OVFLOW:
223 info.si_code = TRAP_TRACEFLOW;
224 sig = SIGTRAP;
225 printk(KERN_EMERG EXC_0x11);
226 CHK_DEBUGGER_TRAP();
227 break;
228 /* 0x12 - Reserved, Caught by default */
229 /* 0x13 - Reserved, Caught by default */
230 /* 0x14 - Reserved, Caught by default */
231 /* 0x15 - Reserved, Caught by default */
232 /* 0x16 - Reserved, Caught by default */
233 /* 0x17 - Reserved, Caught by default */
234 /* 0x18 - Reserved, Caught by default */
235 /* 0x19 - Reserved, Caught by default */
236 /* 0x1A - Reserved, Caught by default */
237 /* 0x1B - Reserved, Caught by default */
238 /* 0x1C - Reserved, Caught by default */
239 /* 0x1D - Reserved, Caught by default */
240 /* 0x1E - Reserved, Caught by default */
241 /* 0x1F - Reserved, Caught by default */
242 /* 0x20 - Reserved, Caught by default */
243 /* 0x21 - Undefined Instruction, handled here */
244 case VEC_UNDEF_I:
245 info.si_code = ILL_ILLOPC;
246 sig = SIGILL;
247 printk(KERN_EMERG EXC_0x21);
248 CHK_DEBUGGER_TRAP();
249 break;
250 /* 0x22 - Illegal Instruction Combination, handled here */
251 case VEC_ILGAL_I:
252 info.si_code = ILL_ILLPARAOP;
253 sig = SIGILL;
254 printk(KERN_EMERG EXC_0x22);
255 CHK_DEBUGGER_TRAP();
256 break;
257 /* 0x23 - Data CPLB Protection Violation,
258 normal case is handled in _cplb_hdr */
259 case VEC_CPLB_VL:
260 info.si_code = ILL_CPLB_VI;
261 sig = SIGILL;
262 printk(KERN_EMERG EXC_0x23);
263 CHK_DEBUGGER_TRAP();
264 break;
265 /* 0x24 - Data access misaligned, handled here */
266 case VEC_MISALI_D:
267 info.si_code = BUS_ADRALN;
268 sig = SIGBUS;
269 printk(KERN_EMERG EXC_0x24);
270 CHK_DEBUGGER_TRAP();
271 break;
272 /* 0x25 - Unrecoverable Event, handled here */
273 case VEC_UNCOV:
274 info.si_code = ILL_ILLEXCPT;
275 sig = SIGILL;
276 printk(KERN_EMERG EXC_0x25);
277 CHK_DEBUGGER_TRAP();
278 break;
279 /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr,
280 error case is handled here */
281 case VEC_CPLB_M:
282 info.si_code = BUS_ADRALN;
283 sig = SIGBUS;
284 printk(KERN_EMERG EXC_0x26);
285 CHK_DEBUGGER_TRAP();
286 break;
287 /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
288 case VEC_CPLB_MHIT:
289 info.si_code = ILL_CPLB_MULHIT;
290#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
291 sig = SIGSEGV;
292 printk(KERN_EMERG "\n\nNULL pointer access (probably)\n");
293#else
294 sig = SIGILL;
295 printk(KERN_EMERG EXC_0x27);
296#endif
297 CHK_DEBUGGER_TRAP();
298 break;
299 /* 0x28 - Emulation Watchpoint, handled here */
300 case VEC_WATCH:
301 info.si_code = TRAP_WATCHPT;
302 sig = SIGTRAP;
303 pr_debug(EXC_0x28);
304 CHK_DEBUGGER_TRAP_MAYBE();
305 /* Check if this is a watchpoint in kernel space */
306 if (fp->ipend & 0xffc0)
307 return;
308 else
309 break;
310#ifdef CONFIG_BF535
311 /* 0x29 - Instruction fetch access error (535 only) */
312 case VEC_ISTRU_VL: /* ADSP-BF535 only (MH) */
313 info.si_code = BUS_OPFETCH;
314 sig = SIGBUS;
315 printk(KERN_EMERG "BF535: VEC_ISTRU_VL\n");
316 CHK_DEBUGGER_TRAP();
317 break;
318#else
319 /* 0x29 - Reserved, Caught by default */
320#endif
321 /* 0x2A - Instruction fetch misaligned, handled here */
322 case VEC_MISALI_I:
323 info.si_code = BUS_ADRALN;
324 sig = SIGBUS;
325 printk(KERN_EMERG EXC_0x2A);
326 CHK_DEBUGGER_TRAP();
327 break;
328 /* 0x2B - Instruction CPLB protection Violation,
329 handled in _cplb_hdr */
330 case VEC_CPLB_I_VL:
331 info.si_code = ILL_CPLB_VI;
332 sig = SIGILL;
333 printk(KERN_EMERG EXC_0x2B);
334 CHK_DEBUGGER_TRAP();
335 break;
336 /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */
337 case VEC_CPLB_I_M:
338 info.si_code = ILL_CPLB_MISS;
339 sig = SIGBUS;
340 printk(KERN_EMERG EXC_0x2C);
341 CHK_DEBUGGER_TRAP();
342 break;
343 /* 0x2D - Instruction CPLB Multiple Hits, handled here */
344 case VEC_CPLB_I_MHIT:
345 info.si_code = ILL_CPLB_MULHIT;
346#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
347 sig = SIGSEGV;
348 printk(KERN_EMERG "\n\nJump to address 0 - 0x0fff\n");
349#else
350 sig = SIGILL;
351 printk(KERN_EMERG EXC_0x2D);
352#endif
353 CHK_DEBUGGER_TRAP();
354 break;
355 /* 0x2E - Illegal use of Supervisor Resource, handled here */
356 case VEC_ILL_RES:
357 info.si_code = ILL_PRVOPC;
358 sig = SIGILL;
359 printk(KERN_EMERG EXC_0x2E);
360 CHK_DEBUGGER_TRAP();
361 break;
362 /* 0x2F - Reserved, Caught by default */
363 /* 0x30 - Reserved, Caught by default */
364 /* 0x31 - Reserved, Caught by default */
365 /* 0x32 - Reserved, Caught by default */
366 /* 0x33 - Reserved, Caught by default */
367 /* 0x34 - Reserved, Caught by default */
368 /* 0x35 - Reserved, Caught by default */
369 /* 0x36 - Reserved, Caught by default */
370 /* 0x37 - Reserved, Caught by default */
371 /* 0x38 - Reserved, Caught by default */
372 /* 0x39 - Reserved, Caught by default */
373 /* 0x3A - Reserved, Caught by default */
374 /* 0x3B - Reserved, Caught by default */
375 /* 0x3C - Reserved, Caught by default */
376 /* 0x3D - Reserved, Caught by default */
377 /* 0x3E - Reserved, Caught by default */
378 /* 0x3F - Reserved, Caught by default */
379 default:
380 info.si_code = TRAP_ILLTRAP;
381 sig = SIGTRAP;
382 printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n",
383 (fp->seqstat & SEQSTAT_EXCAUSE));
384 CHK_DEBUGGER_TRAP();
385 break;
386 }
387
388 info.si_signo = sig;
389 info.si_errno = 0;
390 info.si_addr = (void *)fp->pc;
391 force_sig_info(sig, &info, current);
392 if (sig != 0 && sig != SIGTRAP) {
393 unsigned long stack;
394 dump_bfin_regs(fp, (void *)fp->retx);
395 dump_bfin_trace_buffer();
396 show_stack(current, &stack);
397 if (current->mm == NULL)
398 panic("Kernel exception");
399 }
400
401 /* if the address that we are about to return to is not valid, set it
402 * to a valid address, if we have a current application or panic
403 */
404 if (!(fp->pc <= physical_mem_end
405#if L1_CODE_LENGTH != 0
406 || (fp->pc >= L1_CODE_START &&
407 fp->pc <= (L1_CODE_START + L1_CODE_LENGTH))
408#endif
409 )) {
410 if (current->mm) {
411 fp->pc = current->mm->start_code;
412 } else {
413 printk(KERN_EMERG "I can't return to memory that doesn't exist - bad things happen\n");
414 panic("Help - I've fallen and can't get up\n");
415 }
416 }
417
418 trace_buffer_restore(j);
419 return;
420}
421
422/* Typical exception handling routines */
423
424void dump_bfin_trace_buffer(void)
425{
426 int tflags;
427 trace_buffer_save(tflags);
428
429 if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
430 int i;
431 printk(KERN_EMERG "Hardware Trace:\n");
432 for (i = 0; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
433 printk(KERN_EMERG "%2i Target : ", i);
434 printk_address((unsigned long)bfin_read_TBUF());
435 printk("\n" KERN_EMERG " Source : ");
436 printk_address((unsigned long)bfin_read_TBUF());
437 printk("\n");
438 }
439 }
440
441 trace_buffer_restore(tflags);
442}
443EXPORT_SYMBOL(dump_bfin_trace_buffer);
444
445static void show_trace(struct task_struct *tsk, unsigned long *sp)
446{
447 unsigned long addr;
448
449 printk("\nCall Trace:");
450#ifdef CONFIG_KALLSYMS
451 printk("\n");
452#endif
453
454 while (!kstack_end(sp)) {
455 addr = *sp++;
456 /*
457 * If the address is either in the text segment of the
458 * kernel, or in the region which contains vmalloc'ed
459 * memory, it *may* be the address of a calling
460 * routine; if so, print it so that someone tracing
461 * down the cause of the crash will be able to figure
462 * out the call path that was taken.
463 */
464 if (kernel_text_address(addr))
465 print_ip_sym(addr);
466 }
467
468 printk("\n");
469}
470
471void show_stack(struct task_struct *task, unsigned long *stack)
472{
473 unsigned long *endstack, addr;
474 int i;
475
476 /* Cannot call dump_bfin_trace_buffer() here as show_stack() is
477 * called externally in some places in the kernel.
478 */
479
480 if (!stack) {
481 if (task)
482 stack = (unsigned long *)task->thread.ksp;
483 else
484 stack = (unsigned long *)&stack;
485 }
486
487 addr = (unsigned long)stack;
488 endstack = (unsigned long *)PAGE_ALIGN(addr);
489
490 printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack);
491 for (i = 0; i < kstack_depth_to_print; i++) {
492 if (stack + 1 > endstack)
493 break;
494 if (i % 8 == 0)
495 printk("\n" KERN_EMERG " ");
496 printk(" %08lx", *stack++);
497 }
498
499 show_trace(task, stack);
500}
501
502void dump_stack(void)
503{
504 unsigned long stack;
505 int tflags;
506 trace_buffer_save(tflags);
507 dump_bfin_trace_buffer();
508 show_stack(current, &stack);
509 trace_buffer_restore(tflags);
510}
511
512EXPORT_SYMBOL(dump_stack);
513
514void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
515{
516 if (current->pid) {
517 printk("\nCURRENT PROCESS:\n\n");
518 printk("COMM=%s PID=%d\n", current->comm, current->pid);
519 } else {
520 printk
521 ("\nNo Valid pid - Either things are really messed up, or you are in the kernel\n");
522 }
523
524 if (current->mm) {
525 printk("TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n"
526 "BSS = 0x%p-0x%p USER-STACK = 0x%p\n\n",
527 (void*)current->mm->start_code,
528 (void*)current->mm->end_code,
529 (void*)current->mm->start_data,
530 (void*)current->mm->end_data,
531 (void*)current->mm->end_data,
532 (void*)current->mm->brk,
533 (void*)current->mm->start_stack);
534 }
535
536 printk("return address: 0x%p; contents of [PC-16...PC+8]:\n", retaddr);
537 if (retaddr != 0 && retaddr <= (void*)physical_mem_end
538#if L1_CODE_LENGTH != 0
539 /* FIXME: Copy the code out of L1 Instruction SRAM through dma
540 memcpy. */
541 && !(retaddr >= (void*)L1_CODE_START
542 && retaddr < (void*)(L1_CODE_START + L1_CODE_LENGTH))
543#endif
544 ) {
545 int i = 0;
546 unsigned short x = 0;
547 for (i = -16; i < 8; i++) {
548 if (get_user(x, (unsigned short *)retaddr + i))
549 break;
550#ifndef CONFIG_DEBUG_HWERR
551 /* If one of the last few instructions was a STI
552 * it is likily that the error occured awhile ago
553 * and we just noticed
554 */
555 if (x >= 0x0040 && x <= 0x0047 && i <= 0)
556 panic("\n\nWARNING : You should reconfigure the kernel to turn on\n"
557 " 'Hardware error interrupt debugging'\n"
558 " The rest of this error is meanless\n");
559#endif
560
561 if (i == -8)
562 printk("\n");
563 if (i == 0)
564 printk("X\n");
565 printk("%04x ", x);
566 }
567 } else
568 printk("Cannot look at the [PC] for it is in unreadable L1 SRAM - sorry\n");
569
570 printk("\n\n");
571
572 printk("RETE: %08lx RETN: %08lx RETX: %08lx RETS: %08lx\n",
573 fp->rete, fp->retn, fp->retx, fp->rets);
574 printk("IPEND: %04lx SYSCFG: %04lx\n", fp->ipend, fp->syscfg);
575 printk("SEQSTAT: %08lx SP: %08lx\n", (long)fp->seqstat, (long)fp);
576 printk("R0: %08lx R1: %08lx R2: %08lx R3: %08lx\n",
577 fp->r0, fp->r1, fp->r2, fp->r3);
578 printk("R4: %08lx R5: %08lx R6: %08lx R7: %08lx\n",
579 fp->r4, fp->r5, fp->r6, fp->r7);
580 printk("P0: %08lx P1: %08lx P2: %08lx P3: %08lx\n",
581 fp->p0, fp->p1, fp->p2, fp->p3);
582 printk("P4: %08lx P5: %08lx FP: %08lx\n", fp->p4, fp->p5, fp->fp);
583 printk("A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n",
584 fp->a0w, fp->a0x, fp->a1w, fp->a1x);
585
586 printk("LB0: %08lx LT0: %08lx LC0: %08lx\n", fp->lb0, fp->lt0,
587 fp->lc0);
588 printk("LB1: %08lx LT1: %08lx LC1: %08lx\n", fp->lb1, fp->lt1,
589 fp->lc1);
590 printk("B0: %08lx L0: %08lx M0: %08lx I0: %08lx\n", fp->b0, fp->l0,
591 fp->m0, fp->i0);
592 printk("B1: %08lx L1: %08lx M1: %08lx I1: %08lx\n", fp->b1, fp->l1,
593 fp->m1, fp->i1);
594 printk("B2: %08lx L2: %08lx M2: %08lx I2: %08lx\n", fp->b2, fp->l2,
595 fp->m2, fp->i2);
596 printk("B3: %08lx L3: %08lx M3: %08lx I3: %08lx\n", fp->b3, fp->l3,
597 fp->m3, fp->i3);
598
599 printk("\nUSP: %08lx ASTAT: %08lx\n", rdusp(), fp->astat);
600 if ((long)fp->seqstat & SEQSTAT_EXCAUSE) {
601 printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void*)bfin_read_DCPLB_FAULT_ADDR());
602 printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void*)bfin_read_ICPLB_FAULT_ADDR());
603 }
604
605 printk("\n\n");
606}
607
608#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
609asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
610#endif
611
612asmlinkage int sys_bfin_spinlock(int *spinlock)
613{
614 int ret = 0;
615 int tmp = 0;
616
617 local_irq_disable();
618 ret = get_user(tmp, spinlock);
619 if (ret == 0) {
620 if (tmp)
621 ret = 1;
622 tmp = 1;
623 put_user(tmp, spinlock);
624 }
625 local_irq_enable();
626 return ret;
627}
628
629void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
630{
631 switch (cplb_panic) {
632 case CPLB_NO_UNLOCKED:
633 printk(KERN_EMERG "All CPLBs are locked\n");
634 break;
635 case CPLB_PROT_VIOL:
636 return;
637 case CPLB_NO_ADDR_MATCH:
638 return;
639 case CPLB_UNKNOWN_ERR:
640 printk(KERN_EMERG "Unknown CPLB Exception\n");
641 break;
642 }
643
644 printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void*)bfin_read_DCPLB_FAULT_ADDR());
645 printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void*)bfin_read_ICPLB_FAULT_ADDR());
646 dump_bfin_regs(fp, (void *)fp->retx);
647 dump_stack();
648 panic("Unrecoverable event\n");
649}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-23 11:25:10 -0500