Commit | Line | Data |
---|---|---|
1394f032 BW |
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 | ||
70f12567 | 30 | #include <linux/bug.h> |
1f83b8f1 MF |
31 | #include <linux/uaccess.h> |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/kallsyms.h> | |
d31c5ab1 | 35 | #include <linux/fs.h> |
8feae131 | 36 | #include <linux/rbtree.h> |
1394f032 BW |
37 | #include <asm/traps.h> |
38 | #include <asm/cacheflush.h> | |
f4585a08 | 39 | #include <asm/cplb.h> |
e56e03b0 | 40 | #include <asm/dma.h> |
1394f032 | 41 | #include <asm/blackfin.h> |
1394f032 | 42 | #include <asm/irq_handler.h> |
d8f66c8c | 43 | #include <linux/irq.h> |
669b792c | 44 | #include <asm/trace.h> |
226eb1ef | 45 | #include <asm/fixed_code.h> |
1394f032 BW |
46 | |
47 | #ifdef CONFIG_KGDB | |
1394f032 | 48 | # include <linux/kgdb.h> |
226eb1ef RG |
49 | |
50 | # define CHK_DEBUGGER_TRAP() \ | |
51 | do { \ | |
a5ac0129 | 52 | kgdb_handle_exception(trapnr, sig, info.si_code, fp); \ |
226eb1ef RG |
53 | } while (0) |
54 | # define CHK_DEBUGGER_TRAP_MAYBE() \ | |
55 | do { \ | |
56 | if (kgdb_connected) \ | |
57 | CHK_DEBUGGER_TRAP(); \ | |
58 | } while (0) | |
59 | #else | |
60 | # define CHK_DEBUGGER_TRAP() do { } while (0) | |
61 | # define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0) | |
1394f032 BW |
62 | #endif |
63 | ||
9f06c38f | 64 | |
4ee1c453 | 65 | #ifdef CONFIG_DEBUG_VERBOSE |
9f06c38f RG |
66 | #define verbose_printk(fmt, arg...) \ |
67 | printk(fmt, ##arg) | |
68 | #else | |
69 | #define verbose_printk(fmt, arg...) \ | |
70 | ({ if (0) printk(fmt, ##arg); 0; }) | |
71 | #endif | |
72 | ||
81f7f456 RG |
73 | #if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) |
74 | u32 last_seqstat; | |
75 | #ifdef CONFIG_DEBUG_MMRS_MODULE | |
76 | EXPORT_SYMBOL(last_seqstat); | |
77 | #endif | |
78 | #endif | |
79 | ||
1394f032 BW |
80 | /* Initiate the event table handler */ |
81 | void __init trap_init(void) | |
82 | { | |
83 | CSYNC(); | |
84 | bfin_write_EVT3(trap); | |
85 | CSYNC(); | |
86 | } | |
87 | ||
226eb1ef | 88 | static void decode_address(char *buf, unsigned long address) |
1394f032 | 89 | { |
9f06c38f | 90 | #ifdef CONFIG_DEBUG_VERBOSE |
1394f032 BW |
91 | struct task_struct *p; |
92 | struct mm_struct *mm; | |
885be03b | 93 | unsigned long flags, offset; |
904656cd | 94 | unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); |
8feae131 | 95 | struct rb_node *n; |
1394f032 BW |
96 | |
97 | #ifdef CONFIG_KALLSYMS | |
8a0e6656 | 98 | unsigned long symsize; |
1394f032 BW |
99 | const char *symname; |
100 | char *modname; | |
101 | char *delim = ":"; | |
102 | char namebuf[128]; | |
18070dd6 MF |
103 | #endif |
104 | ||
105 | buf += sprintf(buf, "<0x%08lx> ", address); | |
1394f032 | 106 | |
18070dd6 | 107 | #ifdef CONFIG_KALLSYMS |
1394f032 BW |
108 | /* look up the address and see if we are in kernel space */ |
109 | symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf); | |
110 | ||
111 | if (symname) { | |
112 | /* yeah! kernel space! */ | |
113 | if (!modname) | |
114 | modname = delim = ""; | |
18070dd6 MF |
115 | sprintf(buf, "{ %s%s%s%s + 0x%lx }", |
116 | delim, modname, delim, symname, | |
117 | (unsigned long)offset); | |
885be03b | 118 | return; |
1394f032 BW |
119 | } |
120 | #endif | |
121 | ||
226eb1ef | 122 | if (address >= FIXED_CODE_START && address < FIXED_CODE_END) { |
18070dd6 MF |
123 | /* Problem in fixed code section? */ |
124 | strcat(buf, "/* Maybe fixed code section */"); | |
125 | return; | |
126 | ||
127 | } else if (address < CONFIG_BOOT_LOAD) { | |
128 | /* Problem somewhere before the kernel start address */ | |
129 | strcat(buf, "/* Maybe null pointer? */"); | |
130 | return; | |
131 | ||
132 | } else if (address >= COREMMR_BASE) { | |
133 | strcat(buf, "/* core mmrs */"); | |
134 | return; | |
135 | ||
136 | } else if (address >= SYSMMR_BASE) { | |
137 | strcat(buf, "/* system mmrs */"); | |
226eb1ef | 138 | return; |
226eb1ef | 139 | |
18070dd6 MF |
140 | } else if (address >= L1_ROM_START && address < L1_ROM_START + L1_ROM_LENGTH) { |
141 | strcat(buf, "/* on-chip L1 ROM */"); | |
226eb1ef RG |
142 | return; |
143 | } | |
144 | ||
1394f032 BW |
145 | /* looks like we're off in user-land, so let's walk all the |
146 | * mappings of all our processes and see if we can't be a whee | |
147 | * bit more specific | |
148 | */ | |
885be03b | 149 | write_lock_irqsave(&tasklist_lock, flags); |
1394f032 | 150 | for_each_process(p) { |
904656cd | 151 | mm = (in_atomic ? p->mm : get_task_mm(p)); |
1394f032 BW |
152 | if (!mm) |
153 | continue; | |
154 | ||
8feae131 DH |
155 | for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) { |
156 | struct vm_area_struct *vma; | |
157 | ||
158 | vma = rb_entry(n, struct vm_area_struct, vm_rb); | |
1394f032 BW |
159 | |
160 | if (address >= vma->vm_start && address < vma->vm_end) { | |
cf28b486 | 161 | char _tmpbuf[256]; |
1394f032 BW |
162 | char *name = p->comm; |
163 | struct file *file = vma->vm_file; | |
cf28b486 | 164 | |
6a0bfff4 TP |
165 | if (file) { |
166 | char *d_name = d_path(&file->f_path, _tmpbuf, | |
cf28b486 | 167 | sizeof(_tmpbuf)); |
6a0bfff4 TP |
168 | if (!IS_ERR(d_name)) |
169 | name = d_name; | |
170 | } | |
1394f032 | 171 | |
8a0e6656 MF |
172 | /* FLAT does not have its text aligned to the start of |
173 | * the map while FDPIC ELF does ... | |
174 | */ | |
7f1c9068 RG |
175 | |
176 | /* before we can check flat/fdpic, we need to | |
177 | * make sure current is valid | |
178 | */ | |
179 | if ((unsigned long)current >= FIXED_CODE_START && | |
180 | !((unsigned long)current & 0x3)) { | |
181 | if (current->mm && | |
182 | (address > current->mm->start_code) && | |
183 | (address < current->mm->end_code)) | |
184 | offset = address - current->mm->start_code; | |
185 | else | |
186 | offset = (address - vma->vm_start) + | |
187 | (vma->vm_pgoff << PAGE_SHIFT); | |
188 | ||
18070dd6 | 189 | sprintf(buf, "[ %s + 0x%lx ]", name, offset); |
7f1c9068 | 190 | } else |
18070dd6 MF |
191 | sprintf(buf, "[ %s vma:0x%lx-0x%lx]", |
192 | name, vma->vm_start, vma->vm_end); | |
7f1c9068 | 193 | |
904656cd | 194 | if (!in_atomic) |
885be03b | 195 | mmput(mm); |
7f1c9068 | 196 | |
18070dd6 MF |
197 | if (buf[0] == '\0') |
198 | sprintf(buf, "[ %s ] dynamic memory", name); | |
f09630bf | 199 | |
885be03b | 200 | goto done; |
1394f032 | 201 | } |
1394f032 | 202 | } |
904656cd | 203 | if (!in_atomic) |
885be03b | 204 | mmput(mm); |
1394f032 | 205 | } |
1394f032 BW |
206 | |
207 | /* we were unable to find this address anywhere */ | |
18070dd6 | 208 | sprintf(buf, "/* kernel dynamic memory */"); |
885be03b RG |
209 | |
210 | done: | |
211 | write_unlock_irqrestore(&tasklist_lock, flags); | |
9f06c38f RG |
212 | #else |
213 | sprintf(buf, " "); | |
214 | #endif | |
1394f032 BW |
215 | } |
216 | ||
2ebcade5 RG |
217 | asmlinkage void double_fault_c(struct pt_regs *fp) |
218 | { | |
a0cab656 RG |
219 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON |
220 | int j; | |
221 | trace_buffer_save(j); | |
222 | #endif | |
223 | ||
226eb1ef RG |
224 | console_verbose(); |
225 | oops_in_progress = 1; | |
9f06c38f | 226 | #ifdef CONFIG_DEBUG_VERBOSE |
ad361c98 | 227 | printk(KERN_EMERG "Double Fault\n"); |
0c7a6b21 RG |
228 | #ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT |
229 | if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) { | |
b6dbde27 | 230 | unsigned int cpu = raw_smp_processor_id(); |
0c7a6b21 | 231 | char buf[150]; |
01b9f4b0 | 232 | decode_address(buf, cpu_pda[cpu].retx_doublefault); |
0c7a6b21 | 233 | printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n", |
01b9f4b0 GY |
234 | (unsigned int)cpu_pda[cpu].seqstat_doublefault & SEQSTAT_EXCAUSE, buf); |
235 | decode_address(buf, cpu_pda[cpu].dcplb_doublefault_addr); | |
0c7a6b21 | 236 | printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf); |
01b9f4b0 | 237 | decode_address(buf, cpu_pda[cpu].icplb_doublefault_addr); |
0c7a6b21 RG |
238 | printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf); |
239 | ||
240 | decode_address(buf, fp->retx); | |
8f65873e | 241 | printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf); |
0c7a6b21 RG |
242 | } else |
243 | #endif | |
244 | { | |
245 | dump_bfin_process(fp); | |
246 | dump_bfin_mem(fp); | |
247 | show_regs(fp); | |
a0cab656 | 248 | dump_bfin_trace_buffer(); |
0c7a6b21 | 249 | } |
9f06c38f | 250 | #endif |
d8804adf | 251 | panic("Double Fault - unrecoverable event"); |
2ebcade5 RG |
252 | |
253 | } | |
254 | ||
82bd1d7d MF |
255 | static int kernel_mode_regs(struct pt_regs *regs) |
256 | { | |
257 | return regs->ipend & 0xffc0; | |
258 | } | |
259 | ||
c4baebf2 | 260 | asmlinkage notrace void trap_c(struct pt_regs *fp) |
1394f032 | 261 | { |
518039bc RG |
262 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON |
263 | int j; | |
8f65873e GY |
264 | #endif |
265 | #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO | |
b6dbde27 | 266 | unsigned int cpu = raw_smp_processor_id(); |
518039bc | 267 | #endif |
82bd1d7d | 268 | const char *strerror = NULL; |
518039bc | 269 | int sig = 0; |
1394f032 BW |
270 | siginfo_t info; |
271 | unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE; | |
272 | ||
226eb1ef | 273 | trace_buffer_save(j); |
81f7f456 RG |
274 | #if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) |
275 | last_seqstat = (u32)fp->seqstat; | |
276 | #endif | |
226eb1ef RG |
277 | |
278 | /* Important - be very careful dereferncing pointers - will lead to | |
279 | * double faults if the stack has become corrupt | |
280 | */ | |
281 | ||
1394f032 BW |
282 | /* trap_c() will be called for exceptions. During exceptions |
283 | * processing, the pc value should be set with retx value. | |
284 | * With this change we can cleanup some code in signal.c- TODO | |
285 | */ | |
286 | fp->orig_pc = fp->retx; | |
287 | /* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n", | |
288 | trapnr, fp->ipend, fp->pc, fp->retx); */ | |
289 | ||
290 | /* send the appropriate signal to the user program */ | |
291 | switch (trapnr) { | |
292 | ||
293 | /* This table works in conjuction with the one in ./mach-common/entry.S | |
294 | * Some exceptions are handled there (in assembly, in exception space) | |
295 | * Some are handled here, (in C, in interrupt space) | |
296 | * Some, like CPLB, are handled in both, where the normal path is | |
297 | * handled in assembly/exception space, and the error path is handled | |
298 | * here | |
299 | */ | |
300 | ||
301 | /* 0x00 - Linux Syscall, getting here is an error */ | |
302 | /* 0x01 - userspace gdb breakpoint, handled here */ | |
303 | case VEC_EXCPT01: | |
304 | info.si_code = TRAP_ILLTRAP; | |
305 | sig = SIGTRAP; | |
306 | CHK_DEBUGGER_TRAP_MAYBE(); | |
307 | /* Check if this is a breakpoint in kernel space */ | |
82bd1d7d | 308 | if (kernel_mode_regs(fp)) |
6510a20e | 309 | goto traps_done; |
1394f032 BW |
310 | else |
311 | break; | |
9401e618 | 312 | /* 0x03 - User Defined, userspace stack overflow */ |
1394f032 BW |
313 | case VEC_EXCPT03: |
314 | info.si_code = SEGV_STACKFLOW; | |
315 | sig = SIGSEGV; | |
82bd1d7d | 316 | strerror = KERN_NOTICE EXC_0x03(KERN_NOTICE); |
a5ac0129 | 317 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 | 318 | break; |
27707d3e SZ |
319 | /* 0x02 - KGDB initial connection and break signal trap */ |
320 | case VEC_EXCPT02: | |
321 | #ifdef CONFIG_KGDB | |
322 | info.si_code = TRAP_ILLTRAP; | |
323 | sig = SIGTRAP; | |
324 | CHK_DEBUGGER_TRAP(); | |
6510a20e | 325 | goto traps_done; |
27707d3e | 326 | #endif |
5c64e0d5 RG |
327 | /* 0x04 - User Defined */ |
328 | /* 0x05 - User Defined */ | |
329 | /* 0x06 - User Defined */ | |
330 | /* 0x07 - User Defined */ | |
331 | /* 0x08 - User Defined */ | |
332 | /* 0x09 - User Defined */ | |
333 | /* 0x0A - User Defined */ | |
334 | /* 0x0B - User Defined */ | |
335 | /* 0x0C - User Defined */ | |
336 | /* 0x0D - User Defined */ | |
337 | /* 0x0E - User Defined */ | |
338 | /* 0x0F - User Defined */ | |
27707d3e | 339 | /* If we got here, it is most likely that someone was trying to use a |
5c64e0d5 RG |
340 | * custom exception handler, and it is not actually installed properly |
341 | */ | |
342 | case VEC_EXCPT04 ... VEC_EXCPT15: | |
343 | info.si_code = ILL_ILLPARAOP; | |
344 | sig = SIGILL; | |
82bd1d7d | 345 | strerror = KERN_NOTICE EXC_0x04(KERN_NOTICE); |
5c64e0d5 RG |
346 | CHK_DEBUGGER_TRAP_MAYBE(); |
347 | break; | |
1394f032 BW |
348 | /* 0x10 HW Single step, handled here */ |
349 | case VEC_STEP: | |
350 | info.si_code = TRAP_STEP; | |
351 | sig = SIGTRAP; | |
352 | CHK_DEBUGGER_TRAP_MAYBE(); | |
353 | /* Check if this is a single step in kernel space */ | |
82bd1d7d | 354 | if (kernel_mode_regs(fp)) |
6510a20e | 355 | goto traps_done; |
1394f032 BW |
356 | else |
357 | break; | |
358 | /* 0x11 - Trace Buffer Full, handled here */ | |
359 | case VEC_OVFLOW: | |
360 | info.si_code = TRAP_TRACEFLOW; | |
361 | sig = SIGTRAP; | |
82bd1d7d | 362 | strerror = KERN_NOTICE EXC_0x11(KERN_NOTICE); |
a5ac0129 | 363 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
364 | break; |
365 | /* 0x12 - Reserved, Caught by default */ | |
366 | /* 0x13 - Reserved, Caught by default */ | |
367 | /* 0x14 - Reserved, Caught by default */ | |
368 | /* 0x15 - Reserved, Caught by default */ | |
369 | /* 0x16 - Reserved, Caught by default */ | |
370 | /* 0x17 - Reserved, Caught by default */ | |
371 | /* 0x18 - Reserved, Caught by default */ | |
372 | /* 0x19 - Reserved, Caught by default */ | |
373 | /* 0x1A - Reserved, Caught by default */ | |
374 | /* 0x1B - Reserved, Caught by default */ | |
375 | /* 0x1C - Reserved, Caught by default */ | |
376 | /* 0x1D - Reserved, Caught by default */ | |
377 | /* 0x1E - Reserved, Caught by default */ | |
378 | /* 0x1F - Reserved, Caught by default */ | |
379 | /* 0x20 - Reserved, Caught by default */ | |
380 | /* 0x21 - Undefined Instruction, handled here */ | |
381 | case VEC_UNDEF_I: | |
70f12567 MF |
382 | #ifdef CONFIG_BUG |
383 | if (kernel_mode_regs(fp)) { | |
384 | switch (report_bug(fp->pc, fp)) { | |
385 | case BUG_TRAP_TYPE_NONE: | |
386 | break; | |
387 | case BUG_TRAP_TYPE_WARN: | |
388 | dump_bfin_trace_buffer(); | |
389 | fp->pc += 2; | |
390 | goto traps_done; | |
391 | case BUG_TRAP_TYPE_BUG: | |
392 | /* call to panic() will dump trace, and it is | |
393 | * off at this point, so it won't be clobbered | |
394 | */ | |
395 | panic("BUG()"); | |
396 | } | |
397 | } | |
398 | #endif | |
1394f032 BW |
399 | info.si_code = ILL_ILLOPC; |
400 | sig = SIGILL; | |
82bd1d7d | 401 | strerror = KERN_NOTICE EXC_0x21(KERN_NOTICE); |
a5ac0129 | 402 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
403 | break; |
404 | /* 0x22 - Illegal Instruction Combination, handled here */ | |
405 | case VEC_ILGAL_I: | |
406 | info.si_code = ILL_ILLPARAOP; | |
407 | sig = SIGILL; | |
82bd1d7d | 408 | strerror = KERN_NOTICE EXC_0x22(KERN_NOTICE); |
a5ac0129 | 409 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 | 410 | break; |
f26fbc48 | 411 | /* 0x23 - Data CPLB protection violation, handled here */ |
1394f032 BW |
412 | case VEC_CPLB_VL: |
413 | info.si_code = ILL_CPLB_VI; | |
36b84128 | 414 | sig = SIGSEGV; |
82bd1d7d | 415 | strerror = KERN_NOTICE EXC_0x23(KERN_NOTICE); |
a5ac0129 | 416 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
417 | break; |
418 | /* 0x24 - Data access misaligned, handled here */ | |
419 | case VEC_MISALI_D: | |
420 | info.si_code = BUS_ADRALN; | |
421 | sig = SIGBUS; | |
82bd1d7d | 422 | strerror = KERN_NOTICE EXC_0x24(KERN_NOTICE); |
a5ac0129 | 423 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
424 | break; |
425 | /* 0x25 - Unrecoverable Event, handled here */ | |
426 | case VEC_UNCOV: | |
427 | info.si_code = ILL_ILLEXCPT; | |
428 | sig = SIGILL; | |
82bd1d7d | 429 | strerror = KERN_NOTICE EXC_0x25(KERN_NOTICE); |
a5ac0129 | 430 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
431 | break; |
432 | /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr, | |
433 | error case is handled here */ | |
434 | case VEC_CPLB_M: | |
435 | info.si_code = BUS_ADRALN; | |
436 | sig = SIGBUS; | |
82bd1d7d | 437 | strerror = KERN_NOTICE EXC_0x26(KERN_NOTICE); |
1394f032 BW |
438 | break; |
439 | /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */ | |
440 | case VEC_CPLB_MHIT: | |
441 | info.si_code = ILL_CPLB_MULHIT; | |
1394f032 | 442 | sig = SIGSEGV; |
c6c6f75d | 443 | #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO |
8f65873e | 444 | if (cpu_pda[cpu].dcplb_fault_addr < FIXED_CODE_START) |
82bd1d7d | 445 | strerror = KERN_NOTICE "NULL pointer access\n"; |
c6c6f75d | 446 | else |
1394f032 | 447 | #endif |
82bd1d7d | 448 | strerror = KERN_NOTICE EXC_0x27(KERN_NOTICE); |
a5ac0129 | 449 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
450 | break; |
451 | /* 0x28 - Emulation Watchpoint, handled here */ | |
452 | case VEC_WATCH: | |
453 | info.si_code = TRAP_WATCHPT; | |
454 | sig = SIGTRAP; | |
569a50ca | 455 | pr_debug(EXC_0x28(KERN_DEBUG)); |
1394f032 BW |
456 | CHK_DEBUGGER_TRAP_MAYBE(); |
457 | /* Check if this is a watchpoint in kernel space */ | |
82bd1d7d | 458 | if (kernel_mode_regs(fp)) |
6510a20e | 459 | goto traps_done; |
1394f032 BW |
460 | else |
461 | break; | |
462 | #ifdef CONFIG_BF535 | |
463 | /* 0x29 - Instruction fetch access error (535 only) */ | |
464 | case VEC_ISTRU_VL: /* ADSP-BF535 only (MH) */ | |
465 | info.si_code = BUS_OPFETCH; | |
466 | sig = SIGBUS; | |
82bd1d7d | 467 | strerror = KERN_NOTICE "BF535: VEC_ISTRU_VL\n"; |
a5ac0129 | 468 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
469 | break; |
470 | #else | |
471 | /* 0x29 - Reserved, Caught by default */ | |
472 | #endif | |
473 | /* 0x2A - Instruction fetch misaligned, handled here */ | |
474 | case VEC_MISALI_I: | |
475 | info.si_code = BUS_ADRALN; | |
476 | sig = SIGBUS; | |
82bd1d7d | 477 | strerror = KERN_NOTICE EXC_0x2A(KERN_NOTICE); |
a5ac0129 | 478 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 | 479 | break; |
f26fbc48 | 480 | /* 0x2B - Instruction CPLB protection violation, handled here */ |
1394f032 BW |
481 | case VEC_CPLB_I_VL: |
482 | info.si_code = ILL_CPLB_VI; | |
f26fbc48 | 483 | sig = SIGBUS; |
82bd1d7d | 484 | strerror = KERN_NOTICE EXC_0x2B(KERN_NOTICE); |
a5ac0129 | 485 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
486 | break; |
487 | /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */ | |
488 | case VEC_CPLB_I_M: | |
489 | info.si_code = ILL_CPLB_MISS; | |
490 | sig = SIGBUS; | |
82bd1d7d | 491 | strerror = KERN_NOTICE EXC_0x2C(KERN_NOTICE); |
1394f032 BW |
492 | break; |
493 | /* 0x2D - Instruction CPLB Multiple Hits, handled here */ | |
494 | case VEC_CPLB_I_MHIT: | |
495 | info.si_code = ILL_CPLB_MULHIT; | |
1394f032 | 496 | sig = SIGSEGV; |
c6c6f75d | 497 | #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO |
8f65873e | 498 | if (cpu_pda[cpu].icplb_fault_addr < FIXED_CODE_START) |
82bd1d7d | 499 | strerror = KERN_NOTICE "Jump to NULL address\n"; |
c6c6f75d | 500 | else |
1394f032 | 501 | #endif |
82bd1d7d | 502 | strerror = KERN_NOTICE EXC_0x2D(KERN_NOTICE); |
a5ac0129 | 503 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
504 | break; |
505 | /* 0x2E - Illegal use of Supervisor Resource, handled here */ | |
506 | case VEC_ILL_RES: | |
507 | info.si_code = ILL_PRVOPC; | |
508 | sig = SIGILL; | |
82bd1d7d | 509 | strerror = KERN_NOTICE EXC_0x2E(KERN_NOTICE); |
a5ac0129 | 510 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
511 | break; |
512 | /* 0x2F - Reserved, Caught by default */ | |
513 | /* 0x30 - Reserved, Caught by default */ | |
514 | /* 0x31 - Reserved, Caught by default */ | |
515 | /* 0x32 - Reserved, Caught by default */ | |
516 | /* 0x33 - Reserved, Caught by default */ | |
517 | /* 0x34 - Reserved, Caught by default */ | |
518 | /* 0x35 - Reserved, Caught by default */ | |
519 | /* 0x36 - Reserved, Caught by default */ | |
520 | /* 0x37 - Reserved, Caught by default */ | |
521 | /* 0x38 - Reserved, Caught by default */ | |
522 | /* 0x39 - Reserved, Caught by default */ | |
523 | /* 0x3A - Reserved, Caught by default */ | |
524 | /* 0x3B - Reserved, Caught by default */ | |
525 | /* 0x3C - Reserved, Caught by default */ | |
526 | /* 0x3D - Reserved, Caught by default */ | |
527 | /* 0x3E - Reserved, Caught by default */ | |
528 | /* 0x3F - Reserved, Caught by default */ | |
13fe24f3 RG |
529 | case VEC_HWERR: |
530 | info.si_code = BUS_ADRALN; | |
531 | sig = SIGBUS; | |
532 | switch (fp->seqstat & SEQSTAT_HWERRCAUSE) { | |
533 | /* System MMR Error */ | |
534 | case (SEQSTAT_HWERRCAUSE_SYSTEM_MMR): | |
535 | info.si_code = BUS_ADRALN; | |
536 | sig = SIGBUS; | |
82bd1d7d | 537 | strerror = KERN_NOTICE HWC_x2(KERN_NOTICE); |
13fe24f3 RG |
538 | break; |
539 | /* External Memory Addressing Error */ | |
540 | case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR): | |
541 | info.si_code = BUS_ADRERR; | |
542 | sig = SIGBUS; | |
82bd1d7d | 543 | strerror = KERN_NOTICE HWC_x3(KERN_NOTICE); |
13fe24f3 RG |
544 | break; |
545 | /* Performance Monitor Overflow */ | |
546 | case (SEQSTAT_HWERRCAUSE_PERF_FLOW): | |
82bd1d7d | 547 | strerror = KERN_NOTICE HWC_x12(KERN_NOTICE); |
13fe24f3 RG |
548 | break; |
549 | /* RAISE 5 instruction */ | |
550 | case (SEQSTAT_HWERRCAUSE_RAISE_5): | |
551 | printk(KERN_NOTICE HWC_x18(KERN_NOTICE)); | |
552 | break; | |
553 | default: /* Reserved */ | |
554 | printk(KERN_NOTICE HWC_default(KERN_NOTICE)); | |
555 | break; | |
556 | } | |
a5ac0129 | 557 | CHK_DEBUGGER_TRAP_MAYBE(); |
13fe24f3 | 558 | break; |
5c64e0d5 RG |
559 | /* |
560 | * We should be handling all known exception types above, | |
561 | * if we get here we hit a reserved one, so panic | |
562 | */ | |
1394f032 | 563 | default: |
5c64e0d5 RG |
564 | info.si_code = ILL_ILLPARAOP; |
565 | sig = SIGILL; | |
9f06c38f | 566 | verbose_printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n", |
1394f032 | 567 | (fp->seqstat & SEQSTAT_EXCAUSE)); |
a5ac0129 | 568 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
569 | break; |
570 | } | |
571 | ||
226eb1ef RG |
572 | BUG_ON(sig == 0); |
573 | ||
82bd1d7d MF |
574 | /* If the fault was caused by a kernel thread, or interrupt handler |
575 | * we will kernel panic, so the system reboots. | |
576 | */ | |
577 | if (kernel_mode_regs(fp) || (current && !current->mm)) { | |
578 | console_verbose(); | |
579 | oops_in_progress = 1; | |
82bd1d7d MF |
580 | } |
581 | ||
226eb1ef | 582 | if (sig != SIGTRAP) { |
15627bd3 MF |
583 | if (strerror) |
584 | verbose_printk(strerror); | |
585 | ||
49dce912 | 586 | dump_bfin_process(fp); |
b03b08ba | 587 | dump_bfin_mem(fp); |
49dce912 | 588 | show_regs(fp); |
226eb1ef RG |
589 | |
590 | /* Print out the trace buffer if it makes sense */ | |
591 | #ifndef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE | |
592 | if (trapnr == VEC_CPLB_I_M || trapnr == VEC_CPLB_M) | |
9f06c38f | 593 | verbose_printk(KERN_NOTICE "No trace since you do not have " |
ad361c98 | 594 | "CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n\n"); |
226eb1ef RG |
595 | else |
596 | #endif | |
597 | dump_bfin_trace_buffer(); | |
f09630bf | 598 | |
226eb1ef | 599 | if (oops_in_progress) { |
f09630bf | 600 | /* Dump the current kernel stack */ |
ad361c98 | 601 | verbose_printk(KERN_NOTICE "Kernel Stack\n"); |
f09630bf | 602 | show_stack(current, NULL); |
aee3a292 | 603 | print_modules(); |
226eb1ef | 604 | #ifndef CONFIG_ACCESS_CHECK |
9f06c38f | 605 | verbose_printk(KERN_EMERG "Please turn on " |
90c7f468 | 606 | "CONFIG_ACCESS_CHECK\n"); |
226eb1ef | 607 | #endif |
1394f032 | 608 | panic("Kernel exception"); |
f09630bf | 609 | } else { |
4ee1c453 | 610 | #ifdef CONFIG_DEBUG_VERBOSE |
9f06c38f | 611 | unsigned long *stack; |
f09630bf RG |
612 | /* Dump the user space stack */ |
613 | stack = (unsigned long *)rdusp(); | |
9f06c38f | 614 | verbose_printk(KERN_NOTICE "Userspace Stack\n"); |
f09630bf | 615 | show_stack(NULL, stack); |
9f06c38f | 616 | #endif |
226eb1ef | 617 | } |
1394f032 | 618 | } |
fb322915 | 619 | |
6a01f230 YL |
620 | #ifdef CONFIG_IPIPE |
621 | if (!ipipe_trap_notify(fp->seqstat & 0x3f, fp)) | |
622 | #endif | |
623 | { | |
624 | info.si_signo = sig; | |
625 | info.si_errno = 0; | |
626 | info.si_addr = (void __user *)fp->pc; | |
627 | force_sig_info(sig, &info, current); | |
628 | } | |
1394f032 | 629 | |
0e4edcf0 | 630 | if ((ANOMALY_05000461 && trapnr == VEC_HWERR && !access_ok(VERIFY_READ, fp->pc, 8)) || |
f574a76a RG |
631 | (ANOMALY_05000281 && trapnr == VEC_HWERR) || |
632 | (ANOMALY_05000189 && (trapnr == VEC_CPLB_I_VL || trapnr == VEC_CPLB_VL))) | |
0acad8df RG |
633 | fp->pc = SAFE_USER_INSTRUCTION; |
634 | ||
6510a20e | 635 | traps_done: |
1394f032 | 636 | trace_buffer_restore(j); |
1394f032 BW |
637 | } |
638 | ||
639 | /* Typical exception handling routines */ | |
640 | ||
518039bc RG |
641 | #define EXPAND_LEN ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 256 - 1) |
642 | ||
f09630bf RG |
643 | /* |
644 | * Similar to get_user, do some address checking, then dereference | |
645 | * Return true on sucess, false on bad address | |
646 | */ | |
9f06c38f | 647 | static bool get_instruction(unsigned short *val, unsigned short *address) |
f09630bf | 648 | { |
e56e03b0 | 649 | unsigned long addr = (unsigned long)address; |
f09630bf RG |
650 | |
651 | /* Check for odd addresses */ | |
652 | if (addr & 0x1) | |
653 | return false; | |
654 | ||
e56e03b0 MF |
655 | /* MMR region will never have instructions */ |
656 | if (addr >= SYSMMR_BASE) | |
f09630bf RG |
657 | return false; |
658 | ||
e56e03b0 MF |
659 | switch (bfin_mem_access_type(addr, 2)) { |
660 | case BFIN_MEM_ACCESS_CORE: | |
661 | case BFIN_MEM_ACCESS_CORE_ONLY: | |
662 | *val = *address; | |
663 | return true; | |
664 | case BFIN_MEM_ACCESS_DMA: | |
665 | dma_memcpy(val, address, 2); | |
666 | return true; | |
667 | case BFIN_MEM_ACCESS_ITEST: | |
668 | isram_memcpy(val, address, 2); | |
669 | return true; | |
670 | default: /* invalid access */ | |
671 | return false; | |
f09630bf | 672 | } |
f09630bf RG |
673 | } |
674 | ||
36f649a5 | 675 | /* |
d3d0ac23 RG |
676 | * decode the instruction if we are printing out the trace, as it |
677 | * makes things easier to follow, without running it through objdump | |
678 | * These are the normal instructions which cause change of flow, which | |
679 | * would be at the source of the trace buffer | |
680 | */ | |
36f649a5 | 681 | #if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_BFIN_HWTRACE_ON) |
9f06c38f | 682 | static void decode_instruction(unsigned short *address) |
d3d0ac23 RG |
683 | { |
684 | unsigned short opcode; | |
685 | ||
686 | if (get_instruction(&opcode, address)) { | |
687 | if (opcode == 0x0010) | |
9f06c38f | 688 | verbose_printk("RTS"); |
d3d0ac23 | 689 | else if (opcode == 0x0011) |
9f06c38f | 690 | verbose_printk("RTI"); |
d3d0ac23 | 691 | else if (opcode == 0x0012) |
9f06c38f | 692 | verbose_printk("RTX"); |
0be58939 RG |
693 | else if (opcode == 0x0013) |
694 | verbose_printk("RTN"); | |
695 | else if (opcode == 0x0014) | |
696 | verbose_printk("RTE"); | |
697 | else if (opcode == 0x0025) | |
698 | verbose_printk("EMUEXCPT"); | |
699 | else if (opcode == 0x0040 && opcode <= 0x0047) | |
700 | verbose_printk("STI R%i", opcode & 7); | |
d3d0ac23 | 701 | else if (opcode >= 0x0050 && opcode <= 0x0057) |
9f06c38f | 702 | verbose_printk("JUMP (P%i)", opcode & 7); |
d3d0ac23 | 703 | else if (opcode >= 0x0060 && opcode <= 0x0067) |
9f06c38f | 704 | verbose_printk("CALL (P%i)", opcode & 7); |
d3d0ac23 | 705 | else if (opcode >= 0x0070 && opcode <= 0x0077) |
9f06c38f | 706 | verbose_printk("CALL (PC+P%i)", opcode & 7); |
d3d0ac23 | 707 | else if (opcode >= 0x0080 && opcode <= 0x0087) |
9f06c38f | 708 | verbose_printk("JUMP (PC+P%i)", opcode & 7); |
0be58939 RG |
709 | else if (opcode >= 0x0090 && opcode <= 0x009F) |
710 | verbose_printk("RAISE 0x%x", opcode & 0xF); | |
711 | else if (opcode >= 0x00A0 && opcode <= 0x00AF) | |
712 | verbose_printk("EXCPT 0x%x", opcode & 0xF); | |
d3d0ac23 | 713 | else if ((opcode >= 0x1000 && opcode <= 0x13FF) || (opcode >= 0x1800 && opcode <= 0x1BFF)) |
9f06c38f | 714 | verbose_printk("IF !CC JUMP"); |
d3d0ac23 | 715 | else if ((opcode >= 0x1400 && opcode <= 0x17ff) || (opcode >= 0x1c00 && opcode <= 0x1fff)) |
9f06c38f | 716 | verbose_printk("IF CC JUMP"); |
d3d0ac23 | 717 | else if (opcode >= 0x2000 && opcode <= 0x2fff) |
9f06c38f | 718 | verbose_printk("JUMP.S"); |
d3d0ac23 | 719 | else if (opcode >= 0xe080 && opcode <= 0xe0ff) |
9f06c38f | 720 | verbose_printk("LSETUP"); |
d3d0ac23 | 721 | else if (opcode >= 0xe200 && opcode <= 0xe2ff) |
9f06c38f | 722 | verbose_printk("JUMP.L"); |
d3d0ac23 | 723 | else if (opcode >= 0xe300 && opcode <= 0xe3ff) |
9f06c38f | 724 | verbose_printk("CALL pcrel"); |
d3d0ac23 | 725 | else |
9f06c38f | 726 | verbose_printk("0x%04x", opcode); |
d3d0ac23 RG |
727 | } |
728 | ||
729 | } | |
9f06c38f | 730 | #endif |
d3d0ac23 | 731 | |
1394f032 BW |
732 | void dump_bfin_trace_buffer(void) |
733 | { | |
9f06c38f | 734 | #ifdef CONFIG_DEBUG_VERBOSE |
518039bc RG |
735 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON |
736 | int tflags, i = 0; | |
226eb1ef | 737 | char buf[150]; |
d3d0ac23 | 738 | unsigned short *addr; |
518039bc RG |
739 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND |
740 | int j, index; | |
741 | #endif | |
742 | ||
1394f032 BW |
743 | trace_buffer_save(tflags); |
744 | ||
226eb1ef | 745 | printk(KERN_NOTICE "Hardware Trace:\n"); |
518039bc | 746 | |
d3d0ac23 RG |
747 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND |
748 | printk(KERN_NOTICE "WARNING: Expanded trace turned on - can not trace exceptions\n"); | |
749 | #endif | |
750 | ||
1394f032 | 751 | if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) { |
518039bc | 752 | for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) { |
226eb1ef RG |
753 | decode_address(buf, (unsigned long)bfin_read_TBUF()); |
754 | printk(KERN_NOTICE "%4i Target : %s\n", i, buf); | |
f09630bf RG |
755 | addr = (unsigned short *)bfin_read_TBUF(); |
756 | decode_address(buf, (unsigned long)addr); | |
757 | printk(KERN_NOTICE " Source : %s ", buf); | |
d3d0ac23 | 758 | decode_instruction(addr); |
f09630bf | 759 | printk("\n"); |
1394f032 BW |
760 | } |
761 | } | |
762 | ||
518039bc RG |
763 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND |
764 | if (trace_buff_offset) | |
d3d0ac23 | 765 | index = trace_buff_offset / 4; |
518039bc RG |
766 | else |
767 | index = EXPAND_LEN; | |
768 | ||
769 | j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128; | |
770 | while (j) { | |
226eb1ef RG |
771 | decode_address(buf, software_trace_buff[index]); |
772 | printk(KERN_NOTICE "%4i Target : %s\n", i, buf); | |
518039bc RG |
773 | index -= 1; |
774 | if (index < 0 ) | |
775 | index = EXPAND_LEN; | |
226eb1ef | 776 | decode_address(buf, software_trace_buff[index]); |
d3d0ac23 RG |
777 | printk(KERN_NOTICE " Source : %s ", buf); |
778 | decode_instruction((unsigned short *)software_trace_buff[index]); | |
779 | printk("\n"); | |
518039bc RG |
780 | index -= 1; |
781 | if (index < 0) | |
782 | index = EXPAND_LEN; | |
518039bc RG |
783 | j--; |
784 | i++; | |
785 | } | |
786 | #endif | |
787 | ||
1394f032 | 788 | trace_buffer_restore(tflags); |
518039bc | 789 | #endif |
9f06c38f | 790 | #endif |
1394f032 BW |
791 | } |
792 | EXPORT_SYMBOL(dump_bfin_trace_buffer); | |
793 | ||
70f12567 MF |
794 | #ifdef CONFIG_BUG |
795 | int is_valid_bugaddr(unsigned long addr) | |
796 | { | |
797 | unsigned short opcode; | |
798 | ||
799 | if (!get_instruction(&opcode, (unsigned short *)addr)) | |
800 | return 0; | |
801 | ||
802 | return opcode == BFIN_BUG_OPCODE; | |
803 | } | |
804 | #endif | |
805 | ||
f09630bf RG |
806 | /* |
807 | * Checks to see if the address pointed to is either a | |
808 | * 16-bit CALL instruction, or a 32-bit CALL instruction | |
809 | */ | |
9f06c38f | 810 | static bool is_bfin_call(unsigned short *addr) |
1394f032 | 811 | { |
f09630bf RG |
812 | unsigned short opcode = 0, *ins_addr; |
813 | ins_addr = (unsigned short *)addr; | |
1394f032 | 814 | |
f09630bf RG |
815 | if (!get_instruction(&opcode, ins_addr)) |
816 | return false; | |
1394f032 | 817 | |
f09630bf RG |
818 | if ((opcode >= 0x0060 && opcode <= 0x0067) || |
819 | (opcode >= 0x0070 && opcode <= 0x0077)) | |
820 | return true; | |
821 | ||
822 | ins_addr--; | |
823 | if (!get_instruction(&opcode, ins_addr)) | |
824 | return false; | |
1394f032 | 825 | |
f09630bf RG |
826 | if (opcode >= 0xE300 && opcode <= 0xE3FF) |
827 | return true; | |
828 | ||
829 | return false; | |
830 | ||
831 | } | |
9f06c38f | 832 | |
1394f032 BW |
833 | void show_stack(struct task_struct *task, unsigned long *stack) |
834 | { | |
9f06c38f | 835 | #ifdef CONFIG_PRINTK |
f09630bf RG |
836 | unsigned int *addr, *endstack, *fp = 0, *frame; |
837 | unsigned short *ins_addr; | |
838 | char buf[150]; | |
839 | unsigned int i, j, ret_addr, frame_no = 0; | |
1394f032 | 840 | |
f09630bf RG |
841 | /* |
842 | * If we have been passed a specific stack, use that one otherwise | |
843 | * if we have been passed a task structure, use that, otherwise | |
844 | * use the stack of where the variable "stack" exists | |
1394f032 BW |
845 | */ |
846 | ||
f09630bf RG |
847 | if (stack == NULL) { |
848 | if (task) { | |
849 | /* We know this is a kernel stack, so this is the start/end */ | |
1394f032 | 850 | stack = (unsigned long *)task->thread.ksp; |
f09630bf RG |
851 | endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE); |
852 | } else { | |
853 | /* print out the existing stack info */ | |
1394f032 | 854 | stack = (unsigned long *)&stack; |
f09630bf RG |
855 | endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack); |
856 | } | |
857 | } else | |
858 | endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack); | |
859 | ||
9f06c38f | 860 | printk(KERN_NOTICE "Stack info:\n"); |
f09630bf | 861 | decode_address(buf, (unsigned int)stack); |
9f06c38f RG |
862 | printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf); |
863 | ||
a0cab656 RG |
864 | if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) { |
865 | printk(KERN_NOTICE "Invalid stack pointer\n"); | |
866 | return; | |
867 | } | |
868 | ||
f09630bf | 869 | /* First thing is to look for a frame pointer */ |
881eb621 | 870 | for (addr = (unsigned int *)((unsigned int)stack & ~0xF); addr < endstack; addr++) { |
f09630bf RG |
871 | if (*addr & 0x1) |
872 | continue; | |
873 | ins_addr = (unsigned short *)*addr; | |
874 | ins_addr--; | |
875 | if (is_bfin_call(ins_addr)) | |
876 | fp = addr - 1; | |
877 | ||
878 | if (fp) { | |
879 | /* Let's check to see if it is a frame pointer */ | |
881eb621 JZ |
880 | while (fp >= (addr - 1) && fp < endstack |
881 | && fp && ((unsigned int) fp & 0x3) == 0) | |
f09630bf RG |
882 | fp = (unsigned int *)*fp; |
883 | if (fp == 0 || fp == endstack) { | |
884 | fp = addr - 1; | |
885 | break; | |
886 | } | |
887 | fp = 0; | |
888 | } | |
1394f032 | 889 | } |
f09630bf RG |
890 | if (fp) { |
891 | frame = fp; | |
b339dc79 | 892 | printk(KERN_NOTICE " FP: (0x%p)\n", fp); |
f09630bf RG |
893 | } else |
894 | frame = 0; | |
1394f032 | 895 | |
f09630bf RG |
896 | /* |
897 | * Now that we think we know where things are, we | |
898 | * walk the stack again, this time printing things out | |
899 | * incase there is no frame pointer, we still look for | |
900 | * valid return addresses | |
901 | */ | |
1394f032 | 902 | |
f09630bf RG |
903 | /* First time print out data, next time, print out symbols */ |
904 | for (j = 0; j <= 1; j++) { | |
905 | if (j) | |
906 | printk(KERN_NOTICE "Return addresses in stack:\n"); | |
907 | else | |
908 | printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack); | |
909 | ||
910 | fp = frame; | |
911 | frame_no = 0; | |
912 | ||
913 | for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0; | |
407505dc | 914 | addr < endstack; addr++, i++) { |
f09630bf RG |
915 | |
916 | ret_addr = 0; | |
917 | if (!j && i % 8 == 0) | |
ad361c98 | 918 | printk(KERN_NOTICE "%p:",addr); |
f09630bf RG |
919 | |
920 | /* if it is an odd address, or zero, just skip it */ | |
921 | if (*addr & 0x1 || !*addr) | |
922 | goto print; | |
923 | ||
924 | ins_addr = (unsigned short *)*addr; | |
925 | ||
926 | /* Go back one instruction, and see if it is a CALL */ | |
927 | ins_addr--; | |
928 | ret_addr = is_bfin_call(ins_addr); | |
929 | print: | |
930 | if (!j && stack == (unsigned long *)addr) | |
931 | printk("[%08x]", *addr); | |
932 | else if (ret_addr) | |
933 | if (j) { | |
934 | decode_address(buf, (unsigned int)*addr); | |
935 | if (frame == addr) { | |
936 | printk(KERN_NOTICE " frame %2i : %s\n", frame_no, buf); | |
937 | continue; | |
938 | } | |
939 | printk(KERN_NOTICE " address : %s\n", buf); | |
940 | } else | |
941 | printk("<%08x>", *addr); | |
942 | else if (fp == addr) { | |
943 | if (j) | |
944 | frame = addr+1; | |
945 | else | |
946 | printk("(%08x)", *addr); | |
947 | ||
948 | fp = (unsigned int *)*addr; | |
949 | frame_no++; | |
950 | ||
951 | } else if (!j) | |
952 | printk(" %08x ", *addr); | |
953 | } | |
954 | if (!j) | |
955 | printk("\n"); | |
1394f032 | 956 | } |
9f06c38f | 957 | #endif |
1394f032 | 958 | } |
bc569f1a | 959 | EXPORT_SYMBOL(show_stack); |
1394f032 BW |
960 | |
961 | void dump_stack(void) | |
962 | { | |
963 | unsigned long stack; | |
518039bc | 964 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON |
1394f032 | 965 | int tflags; |
518039bc | 966 | #endif |
1394f032 BW |
967 | trace_buffer_save(tflags); |
968 | dump_bfin_trace_buffer(); | |
969 | show_stack(current, &stack); | |
970 | trace_buffer_restore(tflags); | |
971 | } | |
1394f032 BW |
972 | EXPORT_SYMBOL(dump_stack); |
973 | ||
49dce912 | 974 | void dump_bfin_process(struct pt_regs *fp) |
1394f032 | 975 | { |
9f06c38f | 976 | #ifdef CONFIG_DEBUG_VERBOSE |
49dce912 MF |
977 | /* We should be able to look at fp->ipend, but we don't push it on the |
978 | * stack all the time, so do this until we fix that */ | |
979 | unsigned int context = bfin_read_IPEND(); | |
980 | ||
981 | if (oops_in_progress) | |
9f06c38f | 982 | verbose_printk(KERN_EMERG "Kernel OOPS in progress\n"); |
49dce912 | 983 | |
b03b08ba | 984 | if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) |
9f06c38f | 985 | verbose_printk(KERN_NOTICE "HW Error context\n"); |
b03b08ba | 986 | else if (context & 0x0020) |
9f06c38f | 987 | verbose_printk(KERN_NOTICE "Deferred Exception context\n"); |
49dce912 | 988 | else if (context & 0x3FC0) |
9f06c38f | 989 | verbose_printk(KERN_NOTICE "Interrupt context\n"); |
49dce912 | 990 | else if (context & 0x4000) |
9f06c38f | 991 | verbose_printk(KERN_NOTICE "Deferred Interrupt context\n"); |
49dce912 | 992 | else if (context & 0x8000) |
9f06c38f | 993 | verbose_printk(KERN_NOTICE "Kernel process context\n"); |
49dce912 | 994 | |
9a62ca40 RG |
995 | /* Because we are crashing, and pointers could be bad, we check things |
996 | * pretty closely before we use them | |
997 | */ | |
7f1c9068 RG |
998 | if ((unsigned long)current >= FIXED_CODE_START && |
999 | !((unsigned long)current & 0x3) && current->pid) { | |
9f06c38f | 1000 | verbose_printk(KERN_NOTICE "CURRENT PROCESS:\n"); |
9a62ca40 | 1001 | if (current->comm >= (char *)FIXED_CODE_START) |
9f06c38f | 1002 | verbose_printk(KERN_NOTICE "COMM=%s PID=%d\n", |
9a62ca40 RG |
1003 | current->comm, current->pid); |
1004 | else | |
9f06c38f | 1005 | verbose_printk(KERN_NOTICE "COMM= invalid\n"); |
9a62ca40 | 1006 | |
8f65873e | 1007 | printk(KERN_NOTICE "CPU = %d\n", current_thread_info()->cpu); |
9a62ca40 | 1008 | if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START) |
ad361c98 JP |
1009 | verbose_printk(KERN_NOTICE |
1010 | "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" | |
1011 | " BSS = 0x%p-0x%p USER-STACK = 0x%p\n\n", | |
9a62ca40 RG |
1012 | (void *)current->mm->start_code, |
1013 | (void *)current->mm->end_code, | |
1014 | (void *)current->mm->start_data, | |
1015 | (void *)current->mm->end_data, | |
1016 | (void *)current->mm->end_data, | |
1017 | (void *)current->mm->brk, | |
1018 | (void *)current->mm->start_stack); | |
1019 | else | |
9f06c38f | 1020 | verbose_printk(KERN_NOTICE "invalid mm\n"); |
49dce912 | 1021 | } else |
ad361c98 JP |
1022 | verbose_printk(KERN_NOTICE |
1023 | "No Valid process in current context\n"); | |
9f06c38f | 1024 | #endif |
49dce912 | 1025 | } |
226eb1ef | 1026 | |
b03b08ba | 1027 | void dump_bfin_mem(struct pt_regs *fp) |
49dce912 | 1028 | { |
9f06c38f | 1029 | #ifdef CONFIG_DEBUG_VERBOSE |
b03b08ba RG |
1030 | unsigned short *addr, *erraddr, val = 0, err = 0; |
1031 | char sti = 0, buf[6]; | |
1394f032 | 1032 | |
5d750b9e | 1033 | erraddr = (void *)fp->pc; |
b03b08ba | 1034 | |
9f06c38f | 1035 | verbose_printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr); |
b03b08ba RG |
1036 | |
1037 | for (addr = (unsigned short *)((unsigned long)erraddr & ~0xF) - 0x10; | |
1038 | addr < (unsigned short *)((unsigned long)erraddr & ~0xF) + 0x10; | |
1039 | addr++) { | |
1040 | if (!((unsigned long)addr & 0xF)) | |
ad361c98 | 1041 | verbose_printk(KERN_NOTICE "0x%p: ", addr); |
b03b08ba | 1042 | |
7d98c881 | 1043 | if (!get_instruction(&val, addr)) { |
b03b08ba RG |
1044 | val = 0; |
1045 | sprintf(buf, "????"); | |
b03b08ba RG |
1046 | } else |
1047 | sprintf(buf, "%04x", val); | |
1048 | ||
1049 | if (addr == erraddr) { | |
9f06c38f | 1050 | verbose_printk("[%s]", buf); |
b03b08ba RG |
1051 | err = val; |
1052 | } else | |
9f06c38f | 1053 | verbose_printk(" %s ", buf); |
b03b08ba RG |
1054 | |
1055 | /* Do any previous instructions turn on interrupts? */ | |
1056 | if (addr <= erraddr && /* in the past */ | |
1057 | ((val >= 0x0040 && val <= 0x0047) || /* STI instruction */ | |
1058 | val == 0x017b)) /* [SP++] = RETI */ | |
1059 | sti = 1; | |
1060 | } | |
1061 | ||
9f06c38f | 1062 | verbose_printk("\n"); |
b03b08ba RG |
1063 | |
1064 | /* Hardware error interrupts can be deferred */ | |
1065 | if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR && | |
1066 | oops_in_progress)){ | |
9f06c38f | 1067 | verbose_printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n"); |
1394f032 | 1068 | #ifndef CONFIG_DEBUG_HWERR |
ad361c98 JP |
1069 | verbose_printk(KERN_NOTICE |
1070 | "The remaining message may be meaningless\n" | |
1071 | "You should enable CONFIG_DEBUG_HWERR to get a better idea where it came from\n"); | |
b03b08ba RG |
1072 | #else |
1073 | /* If we are handling only one peripheral interrupt | |
1074 | * and current mm and pid are valid, and the last error | |
1075 | * was in that user space process's text area | |
1076 | * print it out - because that is where the problem exists | |
1077 | */ | |
1078 | if ((!(((fp)->ipend & ~0x30) & (((fp)->ipend & ~0x30) - 1))) && | |
1079 | (current->pid && current->mm)) { | |
1080 | /* And the last RETI points to the current userspace context */ | |
1081 | if ((fp + 1)->pc >= current->mm->start_code && | |
1082 | (fp + 1)->pc <= current->mm->end_code) { | |
9f06c38f RG |
1083 | verbose_printk(KERN_NOTICE "It might be better to look around here : \n"); |
1084 | verbose_printk(KERN_NOTICE "-------------------------------------------\n"); | |
b03b08ba | 1085 | show_regs(fp + 1); |
9f06c38f | 1086 | verbose_printk(KERN_NOTICE "-------------------------------------------\n"); |
b03b08ba | 1087 | } |
1394f032 | 1088 | } |
b03b08ba RG |
1089 | #endif |
1090 | } | |
9f06c38f | 1091 | #endif |
49dce912 MF |
1092 | } |
1093 | ||
1094 | void show_regs(struct pt_regs *fp) | |
1095 | { | |
9f06c38f | 1096 | #ifdef CONFIG_DEBUG_VERBOSE |
49dce912 | 1097 | char buf [150]; |
d8f66c8c RG |
1098 | struct irqaction *action; |
1099 | unsigned int i; | |
2f95d5bd | 1100 | unsigned long flags = 0; |
b6dbde27 | 1101 | unsigned int cpu = raw_smp_processor_id(); |
2f95d5bd | 1102 | unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); |
226eb1ef | 1103 | |
9ba3c24f RG |
1104 | verbose_printk(KERN_NOTICE "\n"); |
1105 | if (CPUID != bfin_cpuid()) | |
1106 | verbose_printk(KERN_NOTICE "Compiled for cpu family 0x%04x (Rev %d), " | |
1107 | "but running on:0x%04x (Rev %d)\n", | |
1108 | CPUID, bfin_compiled_revid(), bfin_cpuid(), bfin_revid()); | |
1109 | ||
1110 | verbose_printk(KERN_NOTICE "ADSP-%s-0.%d", | |
1111 | CPU, bfin_compiled_revid()); | |
1112 | ||
1113 | if (bfin_compiled_revid() != bfin_revid()) | |
1114 | verbose_printk("(Detected 0.%d)", bfin_revid()); | |
1115 | ||
1116 | verbose_printk(" %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n", | |
1117 | get_cclk()/1000000, get_sclk()/1000000, | |
1118 | #ifdef CONFIG_MPU | |
1119 | "mpu on" | |
1120 | #else | |
1121 | "mpu off" | |
1122 | #endif | |
1123 | ); | |
1124 | ||
1125 | verbose_printk(KERN_NOTICE "%s", linux_banner); | |
1126 | ||
ae4f073c RG |
1127 | verbose_printk(KERN_NOTICE "\nSEQUENCER STATUS:\t\t%s\n", print_tainted()); |
1128 | verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx IMASK: %04lx SYSCFG: %04lx\n", | |
b6dbde27 | 1129 | (long)fp->seqstat, fp->ipend, cpu_pda[raw_smp_processor_id()].ex_imask, fp->syscfg); |
ae4f073c RG |
1130 | if (fp->ipend & EVT_IRPTEN) |
1131 | verbose_printk(KERN_NOTICE " Global Interrupts Disabled (IPEND[4])\n"); | |
b6dbde27 | 1132 | if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG13 | EVT_IVG12 | EVT_IVG11 | |
ae4f073c RG |
1133 | EVT_IVG10 | EVT_IVG9 | EVT_IVG8 | EVT_IVG7 | EVT_IVTMR))) |
1134 | verbose_printk(KERN_NOTICE " Peripheral interrupts masked off\n"); | |
b6dbde27 | 1135 | if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG15 | EVT_IVG14))) |
ae4f073c | 1136 | verbose_printk(KERN_NOTICE " Kernel interrupts masked off\n"); |
1d5ff7e2 | 1137 | if ((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) { |
9f06c38f | 1138 | verbose_printk(KERN_NOTICE " HWERRCAUSE: 0x%lx\n", |
1d5ff7e2 RG |
1139 | (fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14); |
1140 | #ifdef EBIU_ERRMST | |
1141 | /* If the error was from the EBIU, print it out */ | |
1142 | if (bfin_read_EBIU_ERRMST() & CORE_ERROR) { | |
9f06c38f | 1143 | verbose_printk(KERN_NOTICE " EBIU Error Reason : 0x%04x\n", |
1d5ff7e2 | 1144 | bfin_read_EBIU_ERRMST()); |
9f06c38f | 1145 | verbose_printk(KERN_NOTICE " EBIU Error Address : 0x%08x\n", |
1d5ff7e2 RG |
1146 | bfin_read_EBIU_ERRADD()); |
1147 | } | |
1148 | #endif | |
1149 | } | |
9f06c38f | 1150 | verbose_printk(KERN_NOTICE " EXCAUSE : 0x%lx\n", |
13fe24f3 | 1151 | fp->seqstat & SEQSTAT_EXCAUSE); |
2f95d5bd | 1152 | for (i = 2; i <= 15 ; i++) { |
d8f66c8c | 1153 | if (fp->ipend & (1 << i)) { |
2f95d5bd RG |
1154 | if (i != 4) { |
1155 | decode_address(buf, bfin_read32(EVT0 + 4*i)); | |
1156 | verbose_printk(KERN_NOTICE " physical IVG%i asserted : %s\n", i, buf); | |
1157 | } else | |
1158 | verbose_printk(KERN_NOTICE " interrupts disabled\n"); | |
d8f66c8c RG |
1159 | } |
1160 | } | |
1161 | ||
1162 | /* if no interrupts are going off, don't print this out */ | |
1163 | if (fp->ipend & ~0x3F) { | |
1164 | for (i = 0; i < (NR_IRQS - 1); i++) { | |
2f95d5bd RG |
1165 | if (!in_atomic) |
1166 | spin_lock_irqsave(&irq_desc[i].lock, flags); | |
1167 | ||
d8f66c8c RG |
1168 | action = irq_desc[i].action; |
1169 | if (!action) | |
1170 | goto unlock; | |
1171 | ||
1172 | decode_address(buf, (unsigned int)action->handler); | |
9f06c38f | 1173 | verbose_printk(KERN_NOTICE " logical irq %3d mapped : %s", i, buf); |
d8f66c8c RG |
1174 | for (action = action->next; action; action = action->next) { |
1175 | decode_address(buf, (unsigned int)action->handler); | |
9f06c38f | 1176 | verbose_printk(", %s", buf); |
d8f66c8c | 1177 | } |
9f06c38f | 1178 | verbose_printk("\n"); |
d8f66c8c | 1179 | unlock: |
2f95d5bd RG |
1180 | if (!in_atomic) |
1181 | spin_unlock_irqrestore(&irq_desc[i].lock, flags); | |
d8f66c8c RG |
1182 | } |
1183 | } | |
c5d88d9e | 1184 | |
226eb1ef | 1185 | decode_address(buf, fp->rete); |
9f06c38f | 1186 | verbose_printk(KERN_NOTICE " RETE: %s\n", buf); |
226eb1ef | 1187 | decode_address(buf, fp->retn); |
9f06c38f | 1188 | verbose_printk(KERN_NOTICE " RETN: %s\n", buf); |
226eb1ef | 1189 | decode_address(buf, fp->retx); |
9f06c38f | 1190 | verbose_printk(KERN_NOTICE " RETX: %s\n", buf); |
226eb1ef | 1191 | decode_address(buf, fp->rets); |
9f06c38f | 1192 | verbose_printk(KERN_NOTICE " RETS: %s\n", buf); |
49dce912 | 1193 | decode_address(buf, fp->pc); |
9f06c38f | 1194 | verbose_printk(KERN_NOTICE " PC : %s\n", buf); |
c5d88d9e | 1195 | |
13fe24f3 RG |
1196 | if (((long)fp->seqstat & SEQSTAT_EXCAUSE) && |
1197 | (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) { | |
8f65873e | 1198 | decode_address(buf, cpu_pda[cpu].dcplb_fault_addr); |
9f06c38f | 1199 | verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf); |
8f65873e | 1200 | decode_address(buf, cpu_pda[cpu].icplb_fault_addr); |
9f06c38f | 1201 | verbose_printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf); |
226eb1ef RG |
1202 | } |
1203 | ||
ad361c98 | 1204 | verbose_printk(KERN_NOTICE "PROCESSOR STATE:\n"); |
9f06c38f | 1205 | verbose_printk(KERN_NOTICE " R0 : %08lx R1 : %08lx R2 : %08lx R3 : %08lx\n", |
c5d88d9e | 1206 | fp->r0, fp->r1, fp->r2, fp->r3); |
9f06c38f | 1207 | verbose_printk(KERN_NOTICE " R4 : %08lx R5 : %08lx R6 : %08lx R7 : %08lx\n", |
c5d88d9e | 1208 | fp->r4, fp->r5, fp->r6, fp->r7); |
9f06c38f | 1209 | verbose_printk(KERN_NOTICE " P0 : %08lx P1 : %08lx P2 : %08lx P3 : %08lx\n", |
c5d88d9e | 1210 | fp->p0, fp->p1, fp->p2, fp->p3); |
9f06c38f | 1211 | verbose_printk(KERN_NOTICE " P4 : %08lx P5 : %08lx FP : %08lx SP : %08lx\n", |
226eb1ef | 1212 | fp->p4, fp->p5, fp->fp, (long)fp); |
9f06c38f | 1213 | verbose_printk(KERN_NOTICE " LB0: %08lx LT0: %08lx LC0: %08lx\n", |
c5d88d9e | 1214 | fp->lb0, fp->lt0, fp->lc0); |
9f06c38f | 1215 | verbose_printk(KERN_NOTICE " LB1: %08lx LT1: %08lx LC1: %08lx\n", |
c5d88d9e | 1216 | fp->lb1, fp->lt1, fp->lc1); |
9f06c38f | 1217 | verbose_printk(KERN_NOTICE " B0 : %08lx L0 : %08lx M0 : %08lx I0 : %08lx\n", |
c5d88d9e | 1218 | fp->b0, fp->l0, fp->m0, fp->i0); |
9f06c38f | 1219 | verbose_printk(KERN_NOTICE " B1 : %08lx L1 : %08lx M1 : %08lx I1 : %08lx\n", |
c5d88d9e | 1220 | fp->b1, fp->l1, fp->m1, fp->i1); |
9f06c38f | 1221 | verbose_printk(KERN_NOTICE " B2 : %08lx L2 : %08lx M2 : %08lx I2 : %08lx\n", |
c5d88d9e | 1222 | fp->b2, fp->l2, fp->m2, fp->i2); |
9f06c38f | 1223 | verbose_printk(KERN_NOTICE " B3 : %08lx L3 : %08lx M3 : %08lx I3 : %08lx\n", |
c5d88d9e | 1224 | fp->b3, fp->l3, fp->m3, fp->i3); |
9f06c38f | 1225 | verbose_printk(KERN_NOTICE "A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n", |
226eb1ef | 1226 | fp->a0w, fp->a0x, fp->a1w, fp->a1x); |
c5d88d9e | 1227 | |
9f06c38f | 1228 | verbose_printk(KERN_NOTICE "USP : %08lx ASTAT: %08lx\n", |
c5d88d9e | 1229 | rdusp(), fp->astat); |
1394f032 | 1230 | |
9f06c38f RG |
1231 | verbose_printk(KERN_NOTICE "\n"); |
1232 | #endif | |
1394f032 BW |
1233 | } |
1234 | ||
1235 | #ifdef CONFIG_SYS_BFIN_SPINLOCK_L1 | |
1236 | asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text)); | |
1237 | #endif | |
1238 | ||
8f65873e GY |
1239 | static DEFINE_SPINLOCK(bfin_spinlock_lock); |
1240 | ||
1241 | asmlinkage int sys_bfin_spinlock(int *p) | |
1394f032 | 1242 | { |
8f65873e | 1243 | int ret, tmp = 0; |
1394f032 | 1244 | |
8f65873e GY |
1245 | spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */ |
1246 | ret = get_user(tmp, p); | |
1247 | if (likely(ret == 0)) { | |
1248 | if (unlikely(tmp)) | |
1394f032 | 1249 | ret = 1; |
8f65873e GY |
1250 | else |
1251 | put_user(1, p); | |
1394f032 | 1252 | } |
8f65873e | 1253 | spin_unlock(&bfin_spinlock_lock); |
1394f032 BW |
1254 | return ret; |
1255 | } | |
1256 | ||
1ffe6646 MF |
1257 | int bfin_request_exception(unsigned int exception, void (*handler)(void)) |
1258 | { | |
1259 | void (*curr_handler)(void); | |
1260 | ||
1261 | if (exception > 0x3F) | |
1262 | return -EINVAL; | |
1263 | ||
1264 | curr_handler = ex_table[exception]; | |
1265 | ||
1266 | if (curr_handler != ex_replaceable) | |
1267 | return -EBUSY; | |
1268 | ||
1269 | ex_table[exception] = handler; | |
1270 | ||
1271 | return 0; | |
1272 | } | |
1273 | EXPORT_SYMBOL(bfin_request_exception); | |
1274 | ||
1275 | int bfin_free_exception(unsigned int exception, void (*handler)(void)) | |
1276 | { | |
1277 | void (*curr_handler)(void); | |
1278 | ||
1279 | if (exception > 0x3F) | |
1280 | return -EINVAL; | |
1281 | ||
1282 | curr_handler = ex_table[exception]; | |
1283 | ||
1284 | if (curr_handler != handler) | |
1285 | return -EBUSY; | |
1286 | ||
1287 | ex_table[exception] = ex_replaceable; | |
1288 | ||
1289 | return 0; | |
1290 | } | |
1291 | EXPORT_SYMBOL(bfin_free_exception); | |
1292 | ||
1394f032 BW |
1293 | void panic_cplb_error(int cplb_panic, struct pt_regs *fp) |
1294 | { | |
1295 | switch (cplb_panic) { | |
1296 | case CPLB_NO_UNLOCKED: | |
1297 | printk(KERN_EMERG "All CPLBs are locked\n"); | |
1298 | break; | |
1299 | case CPLB_PROT_VIOL: | |
1300 | return; | |
1301 | case CPLB_NO_ADDR_MATCH: | |
1302 | return; | |
1303 | case CPLB_UNKNOWN_ERR: | |
1304 | printk(KERN_EMERG "Unknown CPLB Exception\n"); | |
1305 | break; | |
1306 | } | |
1307 | ||
226eb1ef RG |
1308 | oops_in_progress = 1; |
1309 | ||
49dce912 | 1310 | dump_bfin_process(fp); |
b03b08ba | 1311 | dump_bfin_mem(fp); |
49dce912 | 1312 | show_regs(fp); |
1394f032 | 1313 | dump_stack(); |
d8804adf | 1314 | panic("Unrecoverable event"); |
1394f032 | 1315 | } |