Commit | Line | Data |
---|---|---|
1394f032 | 1 | /* |
96f1050d | 2 | * Copyright 2004-2009 Analog Devices Inc. |
1394f032 | 3 | * |
96f1050d | 4 | * Licensed under the GPL-2 or later |
1394f032 BW |
5 | */ |
6 | ||
70f12567 | 7 | #include <linux/bug.h> |
1f83b8f1 MF |
8 | #include <linux/uaccess.h> |
9 | #include <linux/interrupt.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/kallsyms.h> | |
d31c5ab1 | 12 | #include <linux/fs.h> |
8feae131 | 13 | #include <linux/rbtree.h> |
1394f032 BW |
14 | #include <asm/traps.h> |
15 | #include <asm/cacheflush.h> | |
f4585a08 | 16 | #include <asm/cplb.h> |
e56e03b0 | 17 | #include <asm/dma.h> |
1394f032 | 18 | #include <asm/blackfin.h> |
1394f032 | 19 | #include <asm/irq_handler.h> |
d8f66c8c | 20 | #include <linux/irq.h> |
669b792c | 21 | #include <asm/trace.h> |
226eb1ef | 22 | #include <asm/fixed_code.h> |
1394f032 BW |
23 | |
24 | #ifdef CONFIG_KGDB | |
1394f032 | 25 | # include <linux/kgdb.h> |
226eb1ef RG |
26 | |
27 | # define CHK_DEBUGGER_TRAP() \ | |
28 | do { \ | |
a5ac0129 | 29 | kgdb_handle_exception(trapnr, sig, info.si_code, fp); \ |
226eb1ef RG |
30 | } while (0) |
31 | # define CHK_DEBUGGER_TRAP_MAYBE() \ | |
32 | do { \ | |
33 | if (kgdb_connected) \ | |
34 | CHK_DEBUGGER_TRAP(); \ | |
35 | } while (0) | |
36 | #else | |
37 | # define CHK_DEBUGGER_TRAP() do { } while (0) | |
38 | # define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0) | |
1394f032 BW |
39 | #endif |
40 | ||
9f06c38f | 41 | |
4ee1c453 | 42 | #ifdef CONFIG_DEBUG_VERBOSE |
9f06c38f RG |
43 | #define verbose_printk(fmt, arg...) \ |
44 | printk(fmt, ##arg) | |
45 | #else | |
46 | #define verbose_printk(fmt, arg...) \ | |
47 | ({ if (0) printk(fmt, ##arg); 0; }) | |
48 | #endif | |
49 | ||
81f7f456 RG |
50 | #if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) |
51 | u32 last_seqstat; | |
52 | #ifdef CONFIG_DEBUG_MMRS_MODULE | |
53 | EXPORT_SYMBOL(last_seqstat); | |
54 | #endif | |
55 | #endif | |
56 | ||
1394f032 BW |
57 | /* Initiate the event table handler */ |
58 | void __init trap_init(void) | |
59 | { | |
60 | CSYNC(); | |
61 | bfin_write_EVT3(trap); | |
62 | CSYNC(); | |
63 | } | |
64 | ||
226eb1ef | 65 | static void decode_address(char *buf, unsigned long address) |
1394f032 | 66 | { |
9f06c38f | 67 | #ifdef CONFIG_DEBUG_VERBOSE |
1394f032 BW |
68 | struct task_struct *p; |
69 | struct mm_struct *mm; | |
885be03b | 70 | unsigned long flags, offset; |
904656cd | 71 | unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); |
8feae131 | 72 | struct rb_node *n; |
1394f032 BW |
73 | |
74 | #ifdef CONFIG_KALLSYMS | |
8a0e6656 | 75 | unsigned long symsize; |
1394f032 BW |
76 | const char *symname; |
77 | char *modname; | |
78 | char *delim = ":"; | |
79 | char namebuf[128]; | |
18070dd6 MF |
80 | #endif |
81 | ||
82 | buf += sprintf(buf, "<0x%08lx> ", address); | |
1394f032 | 83 | |
18070dd6 | 84 | #ifdef CONFIG_KALLSYMS |
1394f032 BW |
85 | /* look up the address and see if we are in kernel space */ |
86 | symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf); | |
87 | ||
88 | if (symname) { | |
89 | /* yeah! kernel space! */ | |
90 | if (!modname) | |
91 | modname = delim = ""; | |
18070dd6 MF |
92 | sprintf(buf, "{ %s%s%s%s + 0x%lx }", |
93 | delim, modname, delim, symname, | |
94 | (unsigned long)offset); | |
885be03b | 95 | return; |
1394f032 BW |
96 | } |
97 | #endif | |
98 | ||
226eb1ef | 99 | if (address >= FIXED_CODE_START && address < FIXED_CODE_END) { |
18070dd6 MF |
100 | /* Problem in fixed code section? */ |
101 | strcat(buf, "/* Maybe fixed code section */"); | |
102 | return; | |
103 | ||
104 | } else if (address < CONFIG_BOOT_LOAD) { | |
105 | /* Problem somewhere before the kernel start address */ | |
106 | strcat(buf, "/* Maybe null pointer? */"); | |
107 | return; | |
108 | ||
109 | } else if (address >= COREMMR_BASE) { | |
110 | strcat(buf, "/* core mmrs */"); | |
111 | return; | |
112 | ||
113 | } else if (address >= SYSMMR_BASE) { | |
114 | strcat(buf, "/* system mmrs */"); | |
226eb1ef | 115 | return; |
226eb1ef | 116 | |
18070dd6 MF |
117 | } else if (address >= L1_ROM_START && address < L1_ROM_START + L1_ROM_LENGTH) { |
118 | strcat(buf, "/* on-chip L1 ROM */"); | |
226eb1ef RG |
119 | return; |
120 | } | |
121 | ||
dbc5e698 RG |
122 | /* |
123 | * Don't walk any of the vmas if we are oopsing, it has been known | |
124 | * to cause problems - corrupt vmas (kernel crashes) cause double faults | |
125 | */ | |
126 | if (oops_in_progress) { | |
127 | strcat(buf, "/* kernel dynamic memory (maybe user-space) */"); | |
128 | return; | |
129 | } | |
130 | ||
1394f032 BW |
131 | /* looks like we're off in user-land, so let's walk all the |
132 | * mappings of all our processes and see if we can't be a whee | |
133 | * bit more specific | |
134 | */ | |
885be03b | 135 | write_lock_irqsave(&tasklist_lock, flags); |
1394f032 | 136 | for_each_process(p) { |
904656cd | 137 | mm = (in_atomic ? p->mm : get_task_mm(p)); |
1394f032 BW |
138 | if (!mm) |
139 | continue; | |
140 | ||
c6669c22 GY |
141 | if (!down_read_trylock(&mm->mmap_sem)) { |
142 | if (!in_atomic) | |
143 | mmput(mm); | |
144 | continue; | |
145 | } | |
146 | ||
8feae131 DH |
147 | for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) { |
148 | struct vm_area_struct *vma; | |
149 | ||
150 | vma = rb_entry(n, struct vm_area_struct, vm_rb); | |
1394f032 BW |
151 | |
152 | if (address >= vma->vm_start && address < vma->vm_end) { | |
cf28b486 | 153 | char _tmpbuf[256]; |
1394f032 BW |
154 | char *name = p->comm; |
155 | struct file *file = vma->vm_file; | |
cf28b486 | 156 | |
6a0bfff4 TP |
157 | if (file) { |
158 | char *d_name = d_path(&file->f_path, _tmpbuf, | |
cf28b486 | 159 | sizeof(_tmpbuf)); |
6a0bfff4 TP |
160 | if (!IS_ERR(d_name)) |
161 | name = d_name; | |
162 | } | |
1394f032 | 163 | |
8a0e6656 MF |
164 | /* FLAT does not have its text aligned to the start of |
165 | * the map while FDPIC ELF does ... | |
166 | */ | |
7f1c9068 RG |
167 | |
168 | /* before we can check flat/fdpic, we need to | |
169 | * make sure current is valid | |
170 | */ | |
171 | if ((unsigned long)current >= FIXED_CODE_START && | |
172 | !((unsigned long)current & 0x3)) { | |
173 | if (current->mm && | |
174 | (address > current->mm->start_code) && | |
175 | (address < current->mm->end_code)) | |
176 | offset = address - current->mm->start_code; | |
177 | else | |
178 | offset = (address - vma->vm_start) + | |
179 | (vma->vm_pgoff << PAGE_SHIFT); | |
180 | ||
18070dd6 | 181 | sprintf(buf, "[ %s + 0x%lx ]", name, offset); |
7f1c9068 | 182 | } else |
18070dd6 MF |
183 | sprintf(buf, "[ %s vma:0x%lx-0x%lx]", |
184 | name, vma->vm_start, vma->vm_end); | |
7f1c9068 | 185 | |
c6669c22 | 186 | up_read(&mm->mmap_sem); |
904656cd | 187 | if (!in_atomic) |
885be03b | 188 | mmput(mm); |
7f1c9068 | 189 | |
18070dd6 MF |
190 | if (buf[0] == '\0') |
191 | sprintf(buf, "[ %s ] dynamic memory", name); | |
f09630bf | 192 | |
885be03b | 193 | goto done; |
1394f032 | 194 | } |
1394f032 | 195 | } |
c6669c22 GY |
196 | |
197 | up_read(&mm->mmap_sem); | |
904656cd | 198 | if (!in_atomic) |
885be03b | 199 | mmput(mm); |
1394f032 | 200 | } |
1394f032 | 201 | |
c6669c22 GY |
202 | /* |
203 | * we were unable to find this address anywhere, | |
204 | * or some MMs were skipped because they were in use. | |
205 | */ | |
18070dd6 | 206 | sprintf(buf, "/* kernel dynamic memory */"); |
885be03b RG |
207 | |
208 | done: | |
209 | write_unlock_irqrestore(&tasklist_lock, flags); | |
9f06c38f RG |
210 | #else |
211 | sprintf(buf, " "); | |
212 | #endif | |
1394f032 BW |
213 | } |
214 | ||
2ebcade5 RG |
215 | asmlinkage void double_fault_c(struct pt_regs *fp) |
216 | { | |
a0cab656 RG |
217 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON |
218 | int j; | |
219 | trace_buffer_save(j); | |
220 | #endif | |
221 | ||
226eb1ef RG |
222 | console_verbose(); |
223 | oops_in_progress = 1; | |
9f06c38f | 224 | #ifdef CONFIG_DEBUG_VERBOSE |
ad361c98 | 225 | printk(KERN_EMERG "Double Fault\n"); |
0c7a6b21 RG |
226 | #ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT |
227 | if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) { | |
b6dbde27 | 228 | unsigned int cpu = raw_smp_processor_id(); |
0c7a6b21 | 229 | char buf[150]; |
01b9f4b0 | 230 | decode_address(buf, cpu_pda[cpu].retx_doublefault); |
0c7a6b21 | 231 | printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n", |
01b9f4b0 GY |
232 | (unsigned int)cpu_pda[cpu].seqstat_doublefault & SEQSTAT_EXCAUSE, buf); |
233 | decode_address(buf, cpu_pda[cpu].dcplb_doublefault_addr); | |
0c7a6b21 | 234 | printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf); |
01b9f4b0 | 235 | decode_address(buf, cpu_pda[cpu].icplb_doublefault_addr); |
0c7a6b21 RG |
236 | printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf); |
237 | ||
238 | decode_address(buf, fp->retx); | |
8f65873e | 239 | printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf); |
0c7a6b21 RG |
240 | } else |
241 | #endif | |
242 | { | |
243 | dump_bfin_process(fp); | |
244 | dump_bfin_mem(fp); | |
245 | show_regs(fp); | |
a0cab656 | 246 | dump_bfin_trace_buffer(); |
0c7a6b21 | 247 | } |
9f06c38f | 248 | #endif |
d8804adf | 249 | panic("Double Fault - unrecoverable event"); |
2ebcade5 RG |
250 | |
251 | } | |
252 | ||
82bd1d7d MF |
253 | static int kernel_mode_regs(struct pt_regs *regs) |
254 | { | |
255 | return regs->ipend & 0xffc0; | |
256 | } | |
257 | ||
c4baebf2 | 258 | asmlinkage notrace void trap_c(struct pt_regs *fp) |
1394f032 | 259 | { |
518039bc RG |
260 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON |
261 | int j; | |
8f65873e | 262 | #endif |
b6dbde27 | 263 | unsigned int cpu = raw_smp_processor_id(); |
82bd1d7d | 264 | const char *strerror = NULL; |
518039bc | 265 | int sig = 0; |
1394f032 BW |
266 | siginfo_t info; |
267 | unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE; | |
268 | ||
226eb1ef | 269 | trace_buffer_save(j); |
81f7f456 RG |
270 | #if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) |
271 | last_seqstat = (u32)fp->seqstat; | |
272 | #endif | |
226eb1ef RG |
273 | |
274 | /* Important - be very careful dereferncing pointers - will lead to | |
275 | * double faults if the stack has become corrupt | |
276 | */ | |
277 | ||
1394f032 BW |
278 | /* trap_c() will be called for exceptions. During exceptions |
279 | * processing, the pc value should be set with retx value. | |
280 | * With this change we can cleanup some code in signal.c- TODO | |
281 | */ | |
282 | fp->orig_pc = fp->retx; | |
283 | /* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n", | |
284 | trapnr, fp->ipend, fp->pc, fp->retx); */ | |
285 | ||
286 | /* send the appropriate signal to the user program */ | |
287 | switch (trapnr) { | |
288 | ||
289 | /* This table works in conjuction with the one in ./mach-common/entry.S | |
290 | * Some exceptions are handled there (in assembly, in exception space) | |
291 | * Some are handled here, (in C, in interrupt space) | |
292 | * Some, like CPLB, are handled in both, where the normal path is | |
293 | * handled in assembly/exception space, and the error path is handled | |
294 | * here | |
295 | */ | |
296 | ||
297 | /* 0x00 - Linux Syscall, getting here is an error */ | |
298 | /* 0x01 - userspace gdb breakpoint, handled here */ | |
299 | case VEC_EXCPT01: | |
300 | info.si_code = TRAP_ILLTRAP; | |
301 | sig = SIGTRAP; | |
302 | CHK_DEBUGGER_TRAP_MAYBE(); | |
303 | /* Check if this is a breakpoint in kernel space */ | |
82bd1d7d | 304 | if (kernel_mode_regs(fp)) |
6510a20e | 305 | goto traps_done; |
1394f032 BW |
306 | else |
307 | break; | |
9401e618 | 308 | /* 0x03 - User Defined, userspace stack overflow */ |
1394f032 BW |
309 | case VEC_EXCPT03: |
310 | info.si_code = SEGV_STACKFLOW; | |
311 | sig = SIGSEGV; | |
82bd1d7d | 312 | strerror = KERN_NOTICE EXC_0x03(KERN_NOTICE); |
a5ac0129 | 313 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 | 314 | break; |
27707d3e SZ |
315 | /* 0x02 - KGDB initial connection and break signal trap */ |
316 | case VEC_EXCPT02: | |
317 | #ifdef CONFIG_KGDB | |
318 | info.si_code = TRAP_ILLTRAP; | |
319 | sig = SIGTRAP; | |
320 | CHK_DEBUGGER_TRAP(); | |
6510a20e | 321 | goto traps_done; |
27707d3e | 322 | #endif |
5c64e0d5 RG |
323 | /* 0x04 - User Defined */ |
324 | /* 0x05 - User Defined */ | |
325 | /* 0x06 - User Defined */ | |
326 | /* 0x07 - User Defined */ | |
327 | /* 0x08 - User Defined */ | |
328 | /* 0x09 - User Defined */ | |
329 | /* 0x0A - User Defined */ | |
330 | /* 0x0B - User Defined */ | |
331 | /* 0x0C - User Defined */ | |
332 | /* 0x0D - User Defined */ | |
333 | /* 0x0E - User Defined */ | |
334 | /* 0x0F - User Defined */ | |
27707d3e | 335 | /* If we got here, it is most likely that someone was trying to use a |
5c64e0d5 RG |
336 | * custom exception handler, and it is not actually installed properly |
337 | */ | |
338 | case VEC_EXCPT04 ... VEC_EXCPT15: | |
339 | info.si_code = ILL_ILLPARAOP; | |
340 | sig = SIGILL; | |
82bd1d7d | 341 | strerror = KERN_NOTICE EXC_0x04(KERN_NOTICE); |
5c64e0d5 RG |
342 | CHK_DEBUGGER_TRAP_MAYBE(); |
343 | break; | |
1394f032 BW |
344 | /* 0x10 HW Single step, handled here */ |
345 | case VEC_STEP: | |
346 | info.si_code = TRAP_STEP; | |
347 | sig = SIGTRAP; | |
348 | CHK_DEBUGGER_TRAP_MAYBE(); | |
349 | /* Check if this is a single step in kernel space */ | |
82bd1d7d | 350 | if (kernel_mode_regs(fp)) |
6510a20e | 351 | goto traps_done; |
1394f032 BW |
352 | else |
353 | break; | |
354 | /* 0x11 - Trace Buffer Full, handled here */ | |
355 | case VEC_OVFLOW: | |
356 | info.si_code = TRAP_TRACEFLOW; | |
357 | sig = SIGTRAP; | |
82bd1d7d | 358 | strerror = KERN_NOTICE EXC_0x11(KERN_NOTICE); |
a5ac0129 | 359 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
360 | break; |
361 | /* 0x12 - Reserved, Caught by default */ | |
362 | /* 0x13 - Reserved, Caught by default */ | |
363 | /* 0x14 - Reserved, Caught by default */ | |
364 | /* 0x15 - Reserved, Caught by default */ | |
365 | /* 0x16 - Reserved, Caught by default */ | |
366 | /* 0x17 - Reserved, Caught by default */ | |
367 | /* 0x18 - Reserved, Caught by default */ | |
368 | /* 0x19 - Reserved, Caught by default */ | |
369 | /* 0x1A - Reserved, Caught by default */ | |
370 | /* 0x1B - Reserved, Caught by default */ | |
371 | /* 0x1C - Reserved, Caught by default */ | |
372 | /* 0x1D - Reserved, Caught by default */ | |
373 | /* 0x1E - Reserved, Caught by default */ | |
374 | /* 0x1F - Reserved, Caught by default */ | |
375 | /* 0x20 - Reserved, Caught by default */ | |
376 | /* 0x21 - Undefined Instruction, handled here */ | |
377 | case VEC_UNDEF_I: | |
70f12567 MF |
378 | #ifdef CONFIG_BUG |
379 | if (kernel_mode_regs(fp)) { | |
380 | switch (report_bug(fp->pc, fp)) { | |
381 | case BUG_TRAP_TYPE_NONE: | |
382 | break; | |
383 | case BUG_TRAP_TYPE_WARN: | |
384 | dump_bfin_trace_buffer(); | |
385 | fp->pc += 2; | |
386 | goto traps_done; | |
387 | case BUG_TRAP_TYPE_BUG: | |
388 | /* call to panic() will dump trace, and it is | |
389 | * off at this point, so it won't be clobbered | |
390 | */ | |
391 | panic("BUG()"); | |
392 | } | |
393 | } | |
394 | #endif | |
1394f032 BW |
395 | info.si_code = ILL_ILLOPC; |
396 | sig = SIGILL; | |
82bd1d7d | 397 | strerror = KERN_NOTICE EXC_0x21(KERN_NOTICE); |
a5ac0129 | 398 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
399 | break; |
400 | /* 0x22 - Illegal Instruction Combination, handled here */ | |
401 | case VEC_ILGAL_I: | |
402 | info.si_code = ILL_ILLPARAOP; | |
403 | sig = SIGILL; | |
82bd1d7d | 404 | strerror = KERN_NOTICE EXC_0x22(KERN_NOTICE); |
a5ac0129 | 405 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 | 406 | break; |
f26fbc48 | 407 | /* 0x23 - Data CPLB protection violation, handled here */ |
1394f032 BW |
408 | case VEC_CPLB_VL: |
409 | info.si_code = ILL_CPLB_VI; | |
36b84128 | 410 | sig = SIGSEGV; |
82bd1d7d | 411 | strerror = KERN_NOTICE EXC_0x23(KERN_NOTICE); |
a5ac0129 | 412 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
413 | break; |
414 | /* 0x24 - Data access misaligned, handled here */ | |
415 | case VEC_MISALI_D: | |
416 | info.si_code = BUS_ADRALN; | |
417 | sig = SIGBUS; | |
82bd1d7d | 418 | strerror = KERN_NOTICE EXC_0x24(KERN_NOTICE); |
a5ac0129 | 419 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
420 | break; |
421 | /* 0x25 - Unrecoverable Event, handled here */ | |
422 | case VEC_UNCOV: | |
423 | info.si_code = ILL_ILLEXCPT; | |
424 | sig = SIGILL; | |
82bd1d7d | 425 | strerror = KERN_NOTICE EXC_0x25(KERN_NOTICE); |
a5ac0129 | 426 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
427 | break; |
428 | /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr, | |
429 | error case is handled here */ | |
430 | case VEC_CPLB_M: | |
431 | info.si_code = BUS_ADRALN; | |
432 | sig = SIGBUS; | |
82bd1d7d | 433 | strerror = KERN_NOTICE EXC_0x26(KERN_NOTICE); |
1394f032 BW |
434 | break; |
435 | /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */ | |
436 | case VEC_CPLB_MHIT: | |
437 | info.si_code = ILL_CPLB_MULHIT; | |
1394f032 | 438 | sig = SIGSEGV; |
c6c6f75d | 439 | #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO |
8f65873e | 440 | if (cpu_pda[cpu].dcplb_fault_addr < FIXED_CODE_START) |
82bd1d7d | 441 | strerror = KERN_NOTICE "NULL pointer access\n"; |
c6c6f75d | 442 | else |
1394f032 | 443 | #endif |
82bd1d7d | 444 | strerror = KERN_NOTICE EXC_0x27(KERN_NOTICE); |
a5ac0129 | 445 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
446 | break; |
447 | /* 0x28 - Emulation Watchpoint, handled here */ | |
448 | case VEC_WATCH: | |
449 | info.si_code = TRAP_WATCHPT; | |
450 | sig = SIGTRAP; | |
569a50ca | 451 | pr_debug(EXC_0x28(KERN_DEBUG)); |
1394f032 BW |
452 | CHK_DEBUGGER_TRAP_MAYBE(); |
453 | /* Check if this is a watchpoint in kernel space */ | |
82bd1d7d | 454 | if (kernel_mode_regs(fp)) |
6510a20e | 455 | goto traps_done; |
1394f032 BW |
456 | else |
457 | break; | |
458 | #ifdef CONFIG_BF535 | |
459 | /* 0x29 - Instruction fetch access error (535 only) */ | |
460 | case VEC_ISTRU_VL: /* ADSP-BF535 only (MH) */ | |
461 | info.si_code = BUS_OPFETCH; | |
462 | sig = SIGBUS; | |
82bd1d7d | 463 | strerror = KERN_NOTICE "BF535: VEC_ISTRU_VL\n"; |
a5ac0129 | 464 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
465 | break; |
466 | #else | |
467 | /* 0x29 - Reserved, Caught by default */ | |
468 | #endif | |
469 | /* 0x2A - Instruction fetch misaligned, handled here */ | |
470 | case VEC_MISALI_I: | |
471 | info.si_code = BUS_ADRALN; | |
472 | sig = SIGBUS; | |
82bd1d7d | 473 | strerror = KERN_NOTICE EXC_0x2A(KERN_NOTICE); |
a5ac0129 | 474 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 | 475 | break; |
f26fbc48 | 476 | /* 0x2B - Instruction CPLB protection violation, handled here */ |
1394f032 BW |
477 | case VEC_CPLB_I_VL: |
478 | info.si_code = ILL_CPLB_VI; | |
f26fbc48 | 479 | sig = SIGBUS; |
82bd1d7d | 480 | strerror = KERN_NOTICE EXC_0x2B(KERN_NOTICE); |
a5ac0129 | 481 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
482 | break; |
483 | /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */ | |
484 | case VEC_CPLB_I_M: | |
485 | info.si_code = ILL_CPLB_MISS; | |
486 | sig = SIGBUS; | |
82bd1d7d | 487 | strerror = KERN_NOTICE EXC_0x2C(KERN_NOTICE); |
1394f032 BW |
488 | break; |
489 | /* 0x2D - Instruction CPLB Multiple Hits, handled here */ | |
490 | case VEC_CPLB_I_MHIT: | |
491 | info.si_code = ILL_CPLB_MULHIT; | |
1394f032 | 492 | sig = SIGSEGV; |
c6c6f75d | 493 | #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO |
8f65873e | 494 | if (cpu_pda[cpu].icplb_fault_addr < FIXED_CODE_START) |
82bd1d7d | 495 | strerror = KERN_NOTICE "Jump to NULL address\n"; |
c6c6f75d | 496 | else |
1394f032 | 497 | #endif |
82bd1d7d | 498 | strerror = KERN_NOTICE EXC_0x2D(KERN_NOTICE); |
a5ac0129 | 499 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
500 | break; |
501 | /* 0x2E - Illegal use of Supervisor Resource, handled here */ | |
502 | case VEC_ILL_RES: | |
503 | info.si_code = ILL_PRVOPC; | |
504 | sig = SIGILL; | |
82bd1d7d | 505 | strerror = KERN_NOTICE EXC_0x2E(KERN_NOTICE); |
a5ac0129 | 506 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
507 | break; |
508 | /* 0x2F - Reserved, Caught by default */ | |
509 | /* 0x30 - Reserved, Caught by default */ | |
510 | /* 0x31 - Reserved, Caught by default */ | |
511 | /* 0x32 - Reserved, Caught by default */ | |
512 | /* 0x33 - Reserved, Caught by default */ | |
513 | /* 0x34 - Reserved, Caught by default */ | |
514 | /* 0x35 - Reserved, Caught by default */ | |
515 | /* 0x36 - Reserved, Caught by default */ | |
516 | /* 0x37 - Reserved, Caught by default */ | |
517 | /* 0x38 - Reserved, Caught by default */ | |
518 | /* 0x39 - Reserved, Caught by default */ | |
519 | /* 0x3A - Reserved, Caught by default */ | |
520 | /* 0x3B - Reserved, Caught by default */ | |
521 | /* 0x3C - Reserved, Caught by default */ | |
522 | /* 0x3D - Reserved, Caught by default */ | |
523 | /* 0x3E - Reserved, Caught by default */ | |
524 | /* 0x3F - Reserved, Caught by default */ | |
13fe24f3 RG |
525 | case VEC_HWERR: |
526 | info.si_code = BUS_ADRALN; | |
527 | sig = SIGBUS; | |
528 | switch (fp->seqstat & SEQSTAT_HWERRCAUSE) { | |
529 | /* System MMR Error */ | |
530 | case (SEQSTAT_HWERRCAUSE_SYSTEM_MMR): | |
531 | info.si_code = BUS_ADRALN; | |
532 | sig = SIGBUS; | |
82bd1d7d | 533 | strerror = KERN_NOTICE HWC_x2(KERN_NOTICE); |
13fe24f3 RG |
534 | break; |
535 | /* External Memory Addressing Error */ | |
536 | case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR): | |
a00b4fe5 BS |
537 | if (ANOMALY_05000310) { |
538 | static unsigned long anomaly_rets; | |
539 | ||
540 | if ((fp->pc >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && | |
541 | (fp->pc < (L1_CODE_START + L1_CODE_LENGTH))) { | |
542 | /* | |
543 | * A false hardware error will happen while fetching at | |
544 | * the L1 instruction SRAM boundary. Ignore it. | |
545 | */ | |
546 | anomaly_rets = fp->rets; | |
547 | goto traps_done; | |
548 | } else if (fp->rets == anomaly_rets) { | |
549 | /* | |
550 | * While boundary code returns to a function, at the ret | |
551 | * point, a new false hardware error might occur too based | |
552 | * on tests. Ignore it too. | |
553 | */ | |
554 | goto traps_done; | |
555 | } else if ((fp->rets >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && | |
556 | (fp->rets < (L1_CODE_START + L1_CODE_LENGTH))) { | |
557 | /* | |
558 | * If boundary code calls a function, at the entry point, | |
559 | * a new false hardware error maybe happen based on tests. | |
560 | * Ignore it too. | |
561 | */ | |
562 | goto traps_done; | |
563 | } else | |
564 | anomaly_rets = 0; | |
565 | } | |
566 | ||
13fe24f3 RG |
567 | info.si_code = BUS_ADRERR; |
568 | sig = SIGBUS; | |
82bd1d7d | 569 | strerror = KERN_NOTICE HWC_x3(KERN_NOTICE); |
13fe24f3 RG |
570 | break; |
571 | /* Performance Monitor Overflow */ | |
572 | case (SEQSTAT_HWERRCAUSE_PERF_FLOW): | |
82bd1d7d | 573 | strerror = KERN_NOTICE HWC_x12(KERN_NOTICE); |
13fe24f3 RG |
574 | break; |
575 | /* RAISE 5 instruction */ | |
576 | case (SEQSTAT_HWERRCAUSE_RAISE_5): | |
577 | printk(KERN_NOTICE HWC_x18(KERN_NOTICE)); | |
578 | break; | |
579 | default: /* Reserved */ | |
580 | printk(KERN_NOTICE HWC_default(KERN_NOTICE)); | |
581 | break; | |
582 | } | |
a5ac0129 | 583 | CHK_DEBUGGER_TRAP_MAYBE(); |
13fe24f3 | 584 | break; |
5c64e0d5 RG |
585 | /* |
586 | * We should be handling all known exception types above, | |
587 | * if we get here we hit a reserved one, so panic | |
588 | */ | |
1394f032 | 589 | default: |
5c64e0d5 RG |
590 | info.si_code = ILL_ILLPARAOP; |
591 | sig = SIGILL; | |
9f06c38f | 592 | verbose_printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n", |
1394f032 | 593 | (fp->seqstat & SEQSTAT_EXCAUSE)); |
a5ac0129 | 594 | CHK_DEBUGGER_TRAP_MAYBE(); |
1394f032 BW |
595 | break; |
596 | } | |
597 | ||
226eb1ef RG |
598 | BUG_ON(sig == 0); |
599 | ||
82bd1d7d MF |
600 | /* If the fault was caused by a kernel thread, or interrupt handler |
601 | * we will kernel panic, so the system reboots. | |
602 | */ | |
603 | if (kernel_mode_regs(fp) || (current && !current->mm)) { | |
604 | console_verbose(); | |
605 | oops_in_progress = 1; | |
82bd1d7d MF |
606 | } |
607 | ||
226eb1ef | 608 | if (sig != SIGTRAP) { |
15627bd3 MF |
609 | if (strerror) |
610 | verbose_printk(strerror); | |
611 | ||
49dce912 | 612 | dump_bfin_process(fp); |
b03b08ba | 613 | dump_bfin_mem(fp); |
49dce912 | 614 | show_regs(fp); |
226eb1ef RG |
615 | |
616 | /* Print out the trace buffer if it makes sense */ | |
617 | #ifndef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE | |
618 | if (trapnr == VEC_CPLB_I_M || trapnr == VEC_CPLB_M) | |
9f06c38f | 619 | verbose_printk(KERN_NOTICE "No trace since you do not have " |
ad361c98 | 620 | "CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n\n"); |
226eb1ef RG |
621 | else |
622 | #endif | |
623 | dump_bfin_trace_buffer(); | |
f09630bf | 624 | |
226eb1ef | 625 | if (oops_in_progress) { |
f09630bf | 626 | /* Dump the current kernel stack */ |
ad361c98 | 627 | verbose_printk(KERN_NOTICE "Kernel Stack\n"); |
f09630bf | 628 | show_stack(current, NULL); |
aee3a292 | 629 | print_modules(); |
226eb1ef | 630 | #ifndef CONFIG_ACCESS_CHECK |
9f06c38f | 631 | verbose_printk(KERN_EMERG "Please turn on " |
90c7f468 | 632 | "CONFIG_ACCESS_CHECK\n"); |
226eb1ef | 633 | #endif |
1394f032 | 634 | panic("Kernel exception"); |
f09630bf | 635 | } else { |
4ee1c453 | 636 | #ifdef CONFIG_DEBUG_VERBOSE |
9f06c38f | 637 | unsigned long *stack; |
f09630bf RG |
638 | /* Dump the user space stack */ |
639 | stack = (unsigned long *)rdusp(); | |
9f06c38f | 640 | verbose_printk(KERN_NOTICE "Userspace Stack\n"); |
f09630bf | 641 | show_stack(NULL, stack); |
9f06c38f | 642 | #endif |
226eb1ef | 643 | } |
1394f032 | 644 | } |
fb322915 | 645 | |
6a01f230 YL |
646 | #ifdef CONFIG_IPIPE |
647 | if (!ipipe_trap_notify(fp->seqstat & 0x3f, fp)) | |
648 | #endif | |
649 | { | |
650 | info.si_signo = sig; | |
651 | info.si_errno = 0; | |
5e8d3210 BS |
652 | switch (trapnr) { |
653 | case VEC_CPLB_VL: | |
654 | case VEC_MISALI_D: | |
655 | case VEC_CPLB_M: | |
656 | case VEC_CPLB_MHIT: | |
657 | info.si_addr = (void __user *)cpu_pda[cpu].dcplb_fault_addr; | |
658 | break; | |
659 | default: | |
660 | info.si_addr = (void __user *)fp->pc; | |
661 | break; | |
662 | } | |
6a01f230 YL |
663 | force_sig_info(sig, &info, current); |
664 | } | |
1394f032 | 665 | |
0e4edcf0 | 666 | if ((ANOMALY_05000461 && trapnr == VEC_HWERR && !access_ok(VERIFY_READ, fp->pc, 8)) || |
f574a76a RG |
667 | (ANOMALY_05000281 && trapnr == VEC_HWERR) || |
668 | (ANOMALY_05000189 && (trapnr == VEC_CPLB_I_VL || trapnr == VEC_CPLB_VL))) | |
0acad8df RG |
669 | fp->pc = SAFE_USER_INSTRUCTION; |
670 | ||
6510a20e | 671 | traps_done: |
1394f032 | 672 | trace_buffer_restore(j); |
1394f032 BW |
673 | } |
674 | ||
675 | /* Typical exception handling routines */ | |
676 | ||
518039bc RG |
677 | #define EXPAND_LEN ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 256 - 1) |
678 | ||
f09630bf RG |
679 | /* |
680 | * Similar to get_user, do some address checking, then dereference | |
af901ca1 | 681 | * Return true on success, false on bad address |
f09630bf | 682 | */ |
9f06c38f | 683 | static bool get_instruction(unsigned short *val, unsigned short *address) |
f09630bf | 684 | { |
e56e03b0 | 685 | unsigned long addr = (unsigned long)address; |
f09630bf RG |
686 | |
687 | /* Check for odd addresses */ | |
688 | if (addr & 0x1) | |
689 | return false; | |
690 | ||
e56e03b0 MF |
691 | /* MMR region will never have instructions */ |
692 | if (addr >= SYSMMR_BASE) | |
f09630bf RG |
693 | return false; |
694 | ||
e56e03b0 MF |
695 | switch (bfin_mem_access_type(addr, 2)) { |
696 | case BFIN_MEM_ACCESS_CORE: | |
697 | case BFIN_MEM_ACCESS_CORE_ONLY: | |
698 | *val = *address; | |
699 | return true; | |
700 | case BFIN_MEM_ACCESS_DMA: | |
701 | dma_memcpy(val, address, 2); | |
702 | return true; | |
703 | case BFIN_MEM_ACCESS_ITEST: | |
704 | isram_memcpy(val, address, 2); | |
705 | return true; | |
706 | default: /* invalid access */ | |
707 | return false; | |
f09630bf | 708 | } |
f09630bf RG |
709 | } |
710 | ||
36f649a5 | 711 | /* |
d3d0ac23 RG |
712 | * decode the instruction if we are printing out the trace, as it |
713 | * makes things easier to follow, without running it through objdump | |
714 | * These are the normal instructions which cause change of flow, which | |
715 | * would be at the source of the trace buffer | |
716 | */ | |
36f649a5 | 717 | #if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_BFIN_HWTRACE_ON) |
9f06c38f | 718 | static void decode_instruction(unsigned short *address) |
d3d0ac23 RG |
719 | { |
720 | unsigned short opcode; | |
721 | ||
722 | if (get_instruction(&opcode, address)) { | |
723 | if (opcode == 0x0010) | |
9f06c38f | 724 | verbose_printk("RTS"); |
d3d0ac23 | 725 | else if (opcode == 0x0011) |
9f06c38f | 726 | verbose_printk("RTI"); |
d3d0ac23 | 727 | else if (opcode == 0x0012) |
9f06c38f | 728 | verbose_printk("RTX"); |
0be58939 RG |
729 | else if (opcode == 0x0013) |
730 | verbose_printk("RTN"); | |
731 | else if (opcode == 0x0014) | |
732 | verbose_printk("RTE"); | |
733 | else if (opcode == 0x0025) | |
734 | verbose_printk("EMUEXCPT"); | |
48a74f9d | 735 | else if (opcode >= 0x0040 && opcode <= 0x0047) |
0be58939 | 736 | verbose_printk("STI R%i", opcode & 7); |
d3d0ac23 | 737 | else if (opcode >= 0x0050 && opcode <= 0x0057) |
9f06c38f | 738 | verbose_printk("JUMP (P%i)", opcode & 7); |
d3d0ac23 | 739 | else if (opcode >= 0x0060 && opcode <= 0x0067) |
9f06c38f | 740 | verbose_printk("CALL (P%i)", opcode & 7); |
d3d0ac23 | 741 | else if (opcode >= 0x0070 && opcode <= 0x0077) |
9f06c38f | 742 | verbose_printk("CALL (PC+P%i)", opcode & 7); |
d3d0ac23 | 743 | else if (opcode >= 0x0080 && opcode <= 0x0087) |
9f06c38f | 744 | verbose_printk("JUMP (PC+P%i)", opcode & 7); |
0be58939 RG |
745 | else if (opcode >= 0x0090 && opcode <= 0x009F) |
746 | verbose_printk("RAISE 0x%x", opcode & 0xF); | |
747 | else if (opcode >= 0x00A0 && opcode <= 0x00AF) | |
748 | verbose_printk("EXCPT 0x%x", opcode & 0xF); | |
d3d0ac23 | 749 | else if ((opcode >= 0x1000 && opcode <= 0x13FF) || (opcode >= 0x1800 && opcode <= 0x1BFF)) |
9f06c38f | 750 | verbose_printk("IF !CC JUMP"); |
d3d0ac23 | 751 | else if ((opcode >= 0x1400 && opcode <= 0x17ff) || (opcode >= 0x1c00 && opcode <= 0x1fff)) |
9f06c38f | 752 | verbose_printk("IF CC JUMP"); |
d3d0ac23 | 753 | else if (opcode >= 0x2000 && opcode <= 0x2fff) |
9f06c38f | 754 | verbose_printk("JUMP.S"); |
d3d0ac23 | 755 | else if (opcode >= 0xe080 && opcode <= 0xe0ff) |
9f06c38f | 756 | verbose_printk("LSETUP"); |
d3d0ac23 | 757 | else if (opcode >= 0xe200 && opcode <= 0xe2ff) |
9f06c38f | 758 | verbose_printk("JUMP.L"); |
d3d0ac23 | 759 | else if (opcode >= 0xe300 && opcode <= 0xe3ff) |
9f06c38f | 760 | verbose_printk("CALL pcrel"); |
d3d0ac23 | 761 | else |
9f06c38f | 762 | verbose_printk("0x%04x", opcode); |
d3d0ac23 RG |
763 | } |
764 | ||
765 | } | |
9f06c38f | 766 | #endif |
d3d0ac23 | 767 | |
1394f032 BW |
768 | void dump_bfin_trace_buffer(void) |
769 | { | |
9f06c38f | 770 | #ifdef CONFIG_DEBUG_VERBOSE |
518039bc RG |
771 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON |
772 | int tflags, i = 0; | |
226eb1ef | 773 | char buf[150]; |
d3d0ac23 | 774 | unsigned short *addr; |
518039bc RG |
775 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND |
776 | int j, index; | |
777 | #endif | |
778 | ||
1394f032 BW |
779 | trace_buffer_save(tflags); |
780 | ||
226eb1ef | 781 | printk(KERN_NOTICE "Hardware Trace:\n"); |
518039bc | 782 | |
d3d0ac23 RG |
783 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND |
784 | printk(KERN_NOTICE "WARNING: Expanded trace turned on - can not trace exceptions\n"); | |
785 | #endif | |
786 | ||
1394f032 | 787 | if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) { |
518039bc | 788 | for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) { |
226eb1ef RG |
789 | decode_address(buf, (unsigned long)bfin_read_TBUF()); |
790 | printk(KERN_NOTICE "%4i Target : %s\n", i, buf); | |
f09630bf RG |
791 | addr = (unsigned short *)bfin_read_TBUF(); |
792 | decode_address(buf, (unsigned long)addr); | |
793 | printk(KERN_NOTICE " Source : %s ", buf); | |
d3d0ac23 | 794 | decode_instruction(addr); |
f09630bf | 795 | printk("\n"); |
1394f032 BW |
796 | } |
797 | } | |
798 | ||
518039bc RG |
799 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND |
800 | if (trace_buff_offset) | |
d3d0ac23 | 801 | index = trace_buff_offset / 4; |
518039bc RG |
802 | else |
803 | index = EXPAND_LEN; | |
804 | ||
805 | j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128; | |
806 | while (j) { | |
226eb1ef RG |
807 | decode_address(buf, software_trace_buff[index]); |
808 | printk(KERN_NOTICE "%4i Target : %s\n", i, buf); | |
518039bc RG |
809 | index -= 1; |
810 | if (index < 0 ) | |
811 | index = EXPAND_LEN; | |
226eb1ef | 812 | decode_address(buf, software_trace_buff[index]); |
d3d0ac23 RG |
813 | printk(KERN_NOTICE " Source : %s ", buf); |
814 | decode_instruction((unsigned short *)software_trace_buff[index]); | |
815 | printk("\n"); | |
518039bc RG |
816 | index -= 1; |
817 | if (index < 0) | |
818 | index = EXPAND_LEN; | |
518039bc RG |
819 | j--; |
820 | i++; | |
821 | } | |
822 | #endif | |
823 | ||
1394f032 | 824 | trace_buffer_restore(tflags); |
518039bc | 825 | #endif |
9f06c38f | 826 | #endif |
1394f032 BW |
827 | } |
828 | EXPORT_SYMBOL(dump_bfin_trace_buffer); | |
829 | ||
70f12567 MF |
830 | #ifdef CONFIG_BUG |
831 | int is_valid_bugaddr(unsigned long addr) | |
832 | { | |
833 | unsigned short opcode; | |
834 | ||
835 | if (!get_instruction(&opcode, (unsigned short *)addr)) | |
836 | return 0; | |
837 | ||
838 | return opcode == BFIN_BUG_OPCODE; | |
839 | } | |
840 | #endif | |
841 | ||
f09630bf RG |
842 | /* |
843 | * Checks to see if the address pointed to is either a | |
844 | * 16-bit CALL instruction, or a 32-bit CALL instruction | |
845 | */ | |
9f06c38f | 846 | static bool is_bfin_call(unsigned short *addr) |
1394f032 | 847 | { |
f09630bf RG |
848 | unsigned short opcode = 0, *ins_addr; |
849 | ins_addr = (unsigned short *)addr; | |
1394f032 | 850 | |
f09630bf RG |
851 | if (!get_instruction(&opcode, ins_addr)) |
852 | return false; | |
1394f032 | 853 | |
f09630bf RG |
854 | if ((opcode >= 0x0060 && opcode <= 0x0067) || |
855 | (opcode >= 0x0070 && opcode <= 0x0077)) | |
856 | return true; | |
857 | ||
858 | ins_addr--; | |
859 | if (!get_instruction(&opcode, ins_addr)) | |
860 | return false; | |
1394f032 | 861 | |
f09630bf RG |
862 | if (opcode >= 0xE300 && opcode <= 0xE3FF) |
863 | return true; | |
864 | ||
865 | return false; | |
866 | ||
867 | } | |
9f06c38f | 868 | |
1394f032 BW |
869 | void show_stack(struct task_struct *task, unsigned long *stack) |
870 | { | |
9f06c38f | 871 | #ifdef CONFIG_PRINTK |
f09630bf RG |
872 | unsigned int *addr, *endstack, *fp = 0, *frame; |
873 | unsigned short *ins_addr; | |
874 | char buf[150]; | |
875 | unsigned int i, j, ret_addr, frame_no = 0; | |
1394f032 | 876 | |
f09630bf RG |
877 | /* |
878 | * If we have been passed a specific stack, use that one otherwise | |
879 | * if we have been passed a task structure, use that, otherwise | |
880 | * use the stack of where the variable "stack" exists | |
1394f032 BW |
881 | */ |
882 | ||
f09630bf RG |
883 | if (stack == NULL) { |
884 | if (task) { | |
885 | /* We know this is a kernel stack, so this is the start/end */ | |
1394f032 | 886 | stack = (unsigned long *)task->thread.ksp; |
f09630bf RG |
887 | endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE); |
888 | } else { | |
889 | /* print out the existing stack info */ | |
1394f032 | 890 | stack = (unsigned long *)&stack; |
f09630bf RG |
891 | endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack); |
892 | } | |
893 | } else | |
894 | endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack); | |
895 | ||
9f06c38f | 896 | printk(KERN_NOTICE "Stack info:\n"); |
f09630bf | 897 | decode_address(buf, (unsigned int)stack); |
9f06c38f RG |
898 | printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf); |
899 | ||
a0cab656 RG |
900 | if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) { |
901 | printk(KERN_NOTICE "Invalid stack pointer\n"); | |
902 | return; | |
903 | } | |
904 | ||
f09630bf | 905 | /* First thing is to look for a frame pointer */ |
881eb621 | 906 | for (addr = (unsigned int *)((unsigned int)stack & ~0xF); addr < endstack; addr++) { |
f09630bf RG |
907 | if (*addr & 0x1) |
908 | continue; | |
909 | ins_addr = (unsigned short *)*addr; | |
910 | ins_addr--; | |
911 | if (is_bfin_call(ins_addr)) | |
912 | fp = addr - 1; | |
913 | ||
914 | if (fp) { | |
915 | /* Let's check to see if it is a frame pointer */ | |
881eb621 JZ |
916 | while (fp >= (addr - 1) && fp < endstack |
917 | && fp && ((unsigned int) fp & 0x3) == 0) | |
f09630bf RG |
918 | fp = (unsigned int *)*fp; |
919 | if (fp == 0 || fp == endstack) { | |
920 | fp = addr - 1; | |
921 | break; | |
922 | } | |
923 | fp = 0; | |
924 | } | |
1394f032 | 925 | } |
f09630bf RG |
926 | if (fp) { |
927 | frame = fp; | |
b339dc79 | 928 | printk(KERN_NOTICE " FP: (0x%p)\n", fp); |
f09630bf RG |
929 | } else |
930 | frame = 0; | |
1394f032 | 931 | |
f09630bf RG |
932 | /* |
933 | * Now that we think we know where things are, we | |
934 | * walk the stack again, this time printing things out | |
935 | * incase there is no frame pointer, we still look for | |
936 | * valid return addresses | |
937 | */ | |
1394f032 | 938 | |
f09630bf RG |
939 | /* First time print out data, next time, print out symbols */ |
940 | for (j = 0; j <= 1; j++) { | |
941 | if (j) | |
942 | printk(KERN_NOTICE "Return addresses in stack:\n"); | |
943 | else | |
944 | printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack); | |
945 | ||
946 | fp = frame; | |
947 | frame_no = 0; | |
948 | ||
949 | for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0; | |
407505dc | 950 | addr < endstack; addr++, i++) { |
f09630bf RG |
951 | |
952 | ret_addr = 0; | |
953 | if (!j && i % 8 == 0) | |
ad361c98 | 954 | printk(KERN_NOTICE "%p:",addr); |
f09630bf RG |
955 | |
956 | /* if it is an odd address, or zero, just skip it */ | |
957 | if (*addr & 0x1 || !*addr) | |
958 | goto print; | |
959 | ||
960 | ins_addr = (unsigned short *)*addr; | |
961 | ||
962 | /* Go back one instruction, and see if it is a CALL */ | |
963 | ins_addr--; | |
964 | ret_addr = is_bfin_call(ins_addr); | |
965 | print: | |
966 | if (!j && stack == (unsigned long *)addr) | |
967 | printk("[%08x]", *addr); | |
968 | else if (ret_addr) | |
969 | if (j) { | |
970 | decode_address(buf, (unsigned int)*addr); | |
971 | if (frame == addr) { | |
972 | printk(KERN_NOTICE " frame %2i : %s\n", frame_no, buf); | |
973 | continue; | |
974 | } | |
975 | printk(KERN_NOTICE " address : %s\n", buf); | |
976 | } else | |
977 | printk("<%08x>", *addr); | |
978 | else if (fp == addr) { | |
979 | if (j) | |
980 | frame = addr+1; | |
981 | else | |
982 | printk("(%08x)", *addr); | |
983 | ||
984 | fp = (unsigned int *)*addr; | |
985 | frame_no++; | |
986 | ||
987 | } else if (!j) | |
988 | printk(" %08x ", *addr); | |
989 | } | |
990 | if (!j) | |
991 | printk("\n"); | |
1394f032 | 992 | } |
9f06c38f | 993 | #endif |
1394f032 | 994 | } |
bc569f1a | 995 | EXPORT_SYMBOL(show_stack); |
1394f032 BW |
996 | |
997 | void dump_stack(void) | |
998 | { | |
999 | unsigned long stack; | |
518039bc | 1000 | #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON |
1394f032 | 1001 | int tflags; |
518039bc | 1002 | #endif |
1394f032 BW |
1003 | trace_buffer_save(tflags); |
1004 | dump_bfin_trace_buffer(); | |
1005 | show_stack(current, &stack); | |
1006 | trace_buffer_restore(tflags); | |
1007 | } | |
1394f032 BW |
1008 | EXPORT_SYMBOL(dump_stack); |
1009 | ||
49dce912 | 1010 | void dump_bfin_process(struct pt_regs *fp) |
1394f032 | 1011 | { |
9f06c38f | 1012 | #ifdef CONFIG_DEBUG_VERBOSE |
49dce912 MF |
1013 | /* We should be able to look at fp->ipend, but we don't push it on the |
1014 | * stack all the time, so do this until we fix that */ | |
1015 | unsigned int context = bfin_read_IPEND(); | |
1016 | ||
1017 | if (oops_in_progress) | |
9f06c38f | 1018 | verbose_printk(KERN_EMERG "Kernel OOPS in progress\n"); |
49dce912 | 1019 | |
b03b08ba | 1020 | if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) |
9f06c38f | 1021 | verbose_printk(KERN_NOTICE "HW Error context\n"); |
b03b08ba | 1022 | else if (context & 0x0020) |
9f06c38f | 1023 | verbose_printk(KERN_NOTICE "Deferred Exception context\n"); |
49dce912 | 1024 | else if (context & 0x3FC0) |
9f06c38f | 1025 | verbose_printk(KERN_NOTICE "Interrupt context\n"); |
49dce912 | 1026 | else if (context & 0x4000) |
9f06c38f | 1027 | verbose_printk(KERN_NOTICE "Deferred Interrupt context\n"); |
49dce912 | 1028 | else if (context & 0x8000) |
9f06c38f | 1029 | verbose_printk(KERN_NOTICE "Kernel process context\n"); |
49dce912 | 1030 | |
9a62ca40 RG |
1031 | /* Because we are crashing, and pointers could be bad, we check things |
1032 | * pretty closely before we use them | |
1033 | */ | |
7f1c9068 RG |
1034 | if ((unsigned long)current >= FIXED_CODE_START && |
1035 | !((unsigned long)current & 0x3) && current->pid) { | |
9f06c38f | 1036 | verbose_printk(KERN_NOTICE "CURRENT PROCESS:\n"); |
9a62ca40 | 1037 | if (current->comm >= (char *)FIXED_CODE_START) |
13a1320c | 1038 | verbose_printk(KERN_NOTICE "COMM=%s PID=%d", |
9a62ca40 RG |
1039 | current->comm, current->pid); |
1040 | else | |
13a1320c | 1041 | verbose_printk(KERN_NOTICE "COMM= invalid"); |
9a62ca40 | 1042 | |
13a1320c | 1043 | printk(KERN_CONT " CPU=%d\n", current_thread_info()->cpu); |
9a62ca40 | 1044 | if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START) |
ad361c98 JP |
1045 | verbose_printk(KERN_NOTICE |
1046 | "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" | |
1047 | " BSS = 0x%p-0x%p USER-STACK = 0x%p\n\n", | |
9a62ca40 RG |
1048 | (void *)current->mm->start_code, |
1049 | (void *)current->mm->end_code, | |
1050 | (void *)current->mm->start_data, | |
1051 | (void *)current->mm->end_data, | |
1052 | (void *)current->mm->end_data, | |
1053 | (void *)current->mm->brk, | |
1054 | (void *)current->mm->start_stack); | |
1055 | else | |
9f06c38f | 1056 | verbose_printk(KERN_NOTICE "invalid mm\n"); |
49dce912 | 1057 | } else |
ad361c98 JP |
1058 | verbose_printk(KERN_NOTICE |
1059 | "No Valid process in current context\n"); | |
9f06c38f | 1060 | #endif |
49dce912 | 1061 | } |
226eb1ef | 1062 | |
b03b08ba | 1063 | void dump_bfin_mem(struct pt_regs *fp) |
49dce912 | 1064 | { |
9f06c38f | 1065 | #ifdef CONFIG_DEBUG_VERBOSE |
b03b08ba RG |
1066 | unsigned short *addr, *erraddr, val = 0, err = 0; |
1067 | char sti = 0, buf[6]; | |
1394f032 | 1068 | |
5d750b9e | 1069 | erraddr = (void *)fp->pc; |
b03b08ba | 1070 | |
9f06c38f | 1071 | verbose_printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr); |
b03b08ba RG |
1072 | |
1073 | for (addr = (unsigned short *)((unsigned long)erraddr & ~0xF) - 0x10; | |
1074 | addr < (unsigned short *)((unsigned long)erraddr & ~0xF) + 0x10; | |
1075 | addr++) { | |
1076 | if (!((unsigned long)addr & 0xF)) | |
ad361c98 | 1077 | verbose_printk(KERN_NOTICE "0x%p: ", addr); |
b03b08ba | 1078 | |
7d98c881 | 1079 | if (!get_instruction(&val, addr)) { |
b03b08ba RG |
1080 | val = 0; |
1081 | sprintf(buf, "????"); | |
b03b08ba RG |
1082 | } else |
1083 | sprintf(buf, "%04x", val); | |
1084 | ||
1085 | if (addr == erraddr) { | |
9f06c38f | 1086 | verbose_printk("[%s]", buf); |
b03b08ba RG |
1087 | err = val; |
1088 | } else | |
9f06c38f | 1089 | verbose_printk(" %s ", buf); |
b03b08ba RG |
1090 | |
1091 | /* Do any previous instructions turn on interrupts? */ | |
1092 | if (addr <= erraddr && /* in the past */ | |
1093 | ((val >= 0x0040 && val <= 0x0047) || /* STI instruction */ | |
1094 | val == 0x017b)) /* [SP++] = RETI */ | |
1095 | sti = 1; | |
1096 | } | |
1097 | ||
9f06c38f | 1098 | verbose_printk("\n"); |
b03b08ba RG |
1099 | |
1100 | /* Hardware error interrupts can be deferred */ | |
1101 | if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR && | |
1102 | oops_in_progress)){ | |
9f06c38f | 1103 | verbose_printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n"); |
1394f032 | 1104 | #ifndef CONFIG_DEBUG_HWERR |
ad361c98 JP |
1105 | verbose_printk(KERN_NOTICE |
1106 | "The remaining message may be meaningless\n" | |
1107 | "You should enable CONFIG_DEBUG_HWERR to get a better idea where it came from\n"); | |
b03b08ba RG |
1108 | #else |
1109 | /* If we are handling only one peripheral interrupt | |
1110 | * and current mm and pid are valid, and the last error | |
1111 | * was in that user space process's text area | |
1112 | * print it out - because that is where the problem exists | |
1113 | */ | |
1114 | if ((!(((fp)->ipend & ~0x30) & (((fp)->ipend & ~0x30) - 1))) && | |
1115 | (current->pid && current->mm)) { | |
1116 | /* And the last RETI points to the current userspace context */ | |
1117 | if ((fp + 1)->pc >= current->mm->start_code && | |
1118 | (fp + 1)->pc <= current->mm->end_code) { | |
2bc4affe | 1119 | verbose_printk(KERN_NOTICE "It might be better to look around here :\n"); |
9f06c38f | 1120 | verbose_printk(KERN_NOTICE "-------------------------------------------\n"); |
b03b08ba | 1121 | show_regs(fp + 1); |
9f06c38f | 1122 | verbose_printk(KERN_NOTICE "-------------------------------------------\n"); |
b03b08ba | 1123 | } |
1394f032 | 1124 | } |
b03b08ba RG |
1125 | #endif |
1126 | } | |
9f06c38f | 1127 | #endif |
49dce912 MF |
1128 | } |
1129 | ||
1130 | void show_regs(struct pt_regs *fp) | |
1131 | { | |
9f06c38f | 1132 | #ifdef CONFIG_DEBUG_VERBOSE |
49dce912 | 1133 | char buf [150]; |
d8f66c8c RG |
1134 | struct irqaction *action; |
1135 | unsigned int i; | |
2f95d5bd | 1136 | unsigned long flags = 0; |
b6dbde27 | 1137 | unsigned int cpu = raw_smp_processor_id(); |
2f95d5bd | 1138 | unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); |
226eb1ef | 1139 | |
9ba3c24f RG |
1140 | verbose_printk(KERN_NOTICE "\n"); |
1141 | if (CPUID != bfin_cpuid()) | |
1142 | verbose_printk(KERN_NOTICE "Compiled for cpu family 0x%04x (Rev %d), " | |
1143 | "but running on:0x%04x (Rev %d)\n", | |
1144 | CPUID, bfin_compiled_revid(), bfin_cpuid(), bfin_revid()); | |
1145 | ||
1146 | verbose_printk(KERN_NOTICE "ADSP-%s-0.%d", | |
1147 | CPU, bfin_compiled_revid()); | |
1148 | ||
1149 | if (bfin_compiled_revid() != bfin_revid()) | |
1150 | verbose_printk("(Detected 0.%d)", bfin_revid()); | |
1151 | ||
1152 | verbose_printk(" %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n", | |
1153 | get_cclk()/1000000, get_sclk()/1000000, | |
1154 | #ifdef CONFIG_MPU | |
1155 | "mpu on" | |
1156 | #else | |
1157 | "mpu off" | |
1158 | #endif | |
1159 | ); | |
1160 | ||
1161 | verbose_printk(KERN_NOTICE "%s", linux_banner); | |
1162 | ||
ae4f073c RG |
1163 | verbose_printk(KERN_NOTICE "\nSEQUENCER STATUS:\t\t%s\n", print_tainted()); |
1164 | verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx IMASK: %04lx SYSCFG: %04lx\n", | |
b6dbde27 | 1165 | (long)fp->seqstat, fp->ipend, cpu_pda[raw_smp_processor_id()].ex_imask, fp->syscfg); |
ae4f073c RG |
1166 | if (fp->ipend & EVT_IRPTEN) |
1167 | verbose_printk(KERN_NOTICE " Global Interrupts Disabled (IPEND[4])\n"); | |
b6dbde27 | 1168 | if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG13 | EVT_IVG12 | EVT_IVG11 | |
ae4f073c RG |
1169 | EVT_IVG10 | EVT_IVG9 | EVT_IVG8 | EVT_IVG7 | EVT_IVTMR))) |
1170 | verbose_printk(KERN_NOTICE " Peripheral interrupts masked off\n"); | |
b6dbde27 | 1171 | if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG15 | EVT_IVG14))) |
ae4f073c | 1172 | verbose_printk(KERN_NOTICE " Kernel interrupts masked off\n"); |
1d5ff7e2 | 1173 | if ((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) { |
9f06c38f | 1174 | verbose_printk(KERN_NOTICE " HWERRCAUSE: 0x%lx\n", |
1d5ff7e2 RG |
1175 | (fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14); |
1176 | #ifdef EBIU_ERRMST | |
1177 | /* If the error was from the EBIU, print it out */ | |
1178 | if (bfin_read_EBIU_ERRMST() & CORE_ERROR) { | |
9f06c38f | 1179 | verbose_printk(KERN_NOTICE " EBIU Error Reason : 0x%04x\n", |
1d5ff7e2 | 1180 | bfin_read_EBIU_ERRMST()); |
9f06c38f | 1181 | verbose_printk(KERN_NOTICE " EBIU Error Address : 0x%08x\n", |
1d5ff7e2 RG |
1182 | bfin_read_EBIU_ERRADD()); |
1183 | } | |
1184 | #endif | |
1185 | } | |
9f06c38f | 1186 | verbose_printk(KERN_NOTICE " EXCAUSE : 0x%lx\n", |
13fe24f3 | 1187 | fp->seqstat & SEQSTAT_EXCAUSE); |
2f95d5bd | 1188 | for (i = 2; i <= 15 ; i++) { |
d8f66c8c | 1189 | if (fp->ipend & (1 << i)) { |
2f95d5bd RG |
1190 | if (i != 4) { |
1191 | decode_address(buf, bfin_read32(EVT0 + 4*i)); | |
1192 | verbose_printk(KERN_NOTICE " physical IVG%i asserted : %s\n", i, buf); | |
1193 | } else | |
1194 | verbose_printk(KERN_NOTICE " interrupts disabled\n"); | |
d8f66c8c RG |
1195 | } |
1196 | } | |
1197 | ||
1198 | /* if no interrupts are going off, don't print this out */ | |
1199 | if (fp->ipend & ~0x3F) { | |
1200 | for (i = 0; i < (NR_IRQS - 1); i++) { | |
2f95d5bd | 1201 | if (!in_atomic) |
239007b8 | 1202 | raw_spin_lock_irqsave(&irq_desc[i].lock, flags); |
2f95d5bd | 1203 | |
d8f66c8c RG |
1204 | action = irq_desc[i].action; |
1205 | if (!action) | |
1206 | goto unlock; | |
1207 | ||
1208 | decode_address(buf, (unsigned int)action->handler); | |
9f06c38f | 1209 | verbose_printk(KERN_NOTICE " logical irq %3d mapped : %s", i, buf); |
d8f66c8c RG |
1210 | for (action = action->next; action; action = action->next) { |
1211 | decode_address(buf, (unsigned int)action->handler); | |
9f06c38f | 1212 | verbose_printk(", %s", buf); |
d8f66c8c | 1213 | } |
9f06c38f | 1214 | verbose_printk("\n"); |
d8f66c8c | 1215 | unlock: |
2f95d5bd | 1216 | if (!in_atomic) |
239007b8 | 1217 | raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags); |
d8f66c8c RG |
1218 | } |
1219 | } | |
c5d88d9e | 1220 | |
226eb1ef | 1221 | decode_address(buf, fp->rete); |
9f06c38f | 1222 | verbose_printk(KERN_NOTICE " RETE: %s\n", buf); |
226eb1ef | 1223 | decode_address(buf, fp->retn); |
9f06c38f | 1224 | verbose_printk(KERN_NOTICE " RETN: %s\n", buf); |
226eb1ef | 1225 | decode_address(buf, fp->retx); |
9f06c38f | 1226 | verbose_printk(KERN_NOTICE " RETX: %s\n", buf); |
226eb1ef | 1227 | decode_address(buf, fp->rets); |
9f06c38f | 1228 | verbose_printk(KERN_NOTICE " RETS: %s\n", buf); |
49dce912 | 1229 | decode_address(buf, fp->pc); |
9f06c38f | 1230 | verbose_printk(KERN_NOTICE " PC : %s\n", buf); |
c5d88d9e | 1231 | |
13fe24f3 RG |
1232 | if (((long)fp->seqstat & SEQSTAT_EXCAUSE) && |
1233 | (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) { | |
8f65873e | 1234 | decode_address(buf, cpu_pda[cpu].dcplb_fault_addr); |
9f06c38f | 1235 | verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf); |
8f65873e | 1236 | decode_address(buf, cpu_pda[cpu].icplb_fault_addr); |
9f06c38f | 1237 | verbose_printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf); |
226eb1ef RG |
1238 | } |
1239 | ||
ad361c98 | 1240 | verbose_printk(KERN_NOTICE "PROCESSOR STATE:\n"); |
9f06c38f | 1241 | verbose_printk(KERN_NOTICE " R0 : %08lx R1 : %08lx R2 : %08lx R3 : %08lx\n", |
c5d88d9e | 1242 | fp->r0, fp->r1, fp->r2, fp->r3); |
9f06c38f | 1243 | verbose_printk(KERN_NOTICE " R4 : %08lx R5 : %08lx R6 : %08lx R7 : %08lx\n", |
c5d88d9e | 1244 | fp->r4, fp->r5, fp->r6, fp->r7); |
9f06c38f | 1245 | verbose_printk(KERN_NOTICE " P0 : %08lx P1 : %08lx P2 : %08lx P3 : %08lx\n", |
c5d88d9e | 1246 | fp->p0, fp->p1, fp->p2, fp->p3); |
9f06c38f | 1247 | verbose_printk(KERN_NOTICE " P4 : %08lx P5 : %08lx FP : %08lx SP : %08lx\n", |
226eb1ef | 1248 | fp->p4, fp->p5, fp->fp, (long)fp); |
9f06c38f | 1249 | verbose_printk(KERN_NOTICE " LB0: %08lx LT0: %08lx LC0: %08lx\n", |
c5d88d9e | 1250 | fp->lb0, fp->lt0, fp->lc0); |
9f06c38f | 1251 | verbose_printk(KERN_NOTICE " LB1: %08lx LT1: %08lx LC1: %08lx\n", |
c5d88d9e | 1252 | fp->lb1, fp->lt1, fp->lc1); |
9f06c38f | 1253 | verbose_printk(KERN_NOTICE " B0 : %08lx L0 : %08lx M0 : %08lx I0 : %08lx\n", |
c5d88d9e | 1254 | fp->b0, fp->l0, fp->m0, fp->i0); |
9f06c38f | 1255 | verbose_printk(KERN_NOTICE " B1 : %08lx L1 : %08lx M1 : %08lx I1 : %08lx\n", |
c5d88d9e | 1256 | fp->b1, fp->l1, fp->m1, fp->i1); |
9f06c38f | 1257 | verbose_printk(KERN_NOTICE " B2 : %08lx L2 : %08lx M2 : %08lx I2 : %08lx\n", |
c5d88d9e | 1258 | fp->b2, fp->l2, fp->m2, fp->i2); |
9f06c38f | 1259 | verbose_printk(KERN_NOTICE " B3 : %08lx L3 : %08lx M3 : %08lx I3 : %08lx\n", |
c5d88d9e | 1260 | fp->b3, fp->l3, fp->m3, fp->i3); |
9f06c38f | 1261 | verbose_printk(KERN_NOTICE "A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n", |
226eb1ef | 1262 | fp->a0w, fp->a0x, fp->a1w, fp->a1x); |
c5d88d9e | 1263 | |
9f06c38f | 1264 | verbose_printk(KERN_NOTICE "USP : %08lx ASTAT: %08lx\n", |
c5d88d9e | 1265 | rdusp(), fp->astat); |
1394f032 | 1266 | |
9f06c38f RG |
1267 | verbose_printk(KERN_NOTICE "\n"); |
1268 | #endif | |
1394f032 BW |
1269 | } |
1270 | ||
1271 | #ifdef CONFIG_SYS_BFIN_SPINLOCK_L1 | |
1272 | asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text)); | |
1273 | #endif | |
1274 | ||
8f65873e GY |
1275 | static DEFINE_SPINLOCK(bfin_spinlock_lock); |
1276 | ||
1277 | asmlinkage int sys_bfin_spinlock(int *p) | |
1394f032 | 1278 | { |
8f65873e | 1279 | int ret, tmp = 0; |
1394f032 | 1280 | |
8f65873e GY |
1281 | spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */ |
1282 | ret = get_user(tmp, p); | |
1283 | if (likely(ret == 0)) { | |
1284 | if (unlikely(tmp)) | |
1394f032 | 1285 | ret = 1; |
8f65873e GY |
1286 | else |
1287 | put_user(1, p); | |
1394f032 | 1288 | } |
8f65873e | 1289 | spin_unlock(&bfin_spinlock_lock); |
1394f032 BW |
1290 | return ret; |
1291 | } | |
1292 | ||
1ffe6646 MF |
1293 | int bfin_request_exception(unsigned int exception, void (*handler)(void)) |
1294 | { | |
1295 | void (*curr_handler)(void); | |
1296 | ||
1297 | if (exception > 0x3F) | |
1298 | return -EINVAL; | |
1299 | ||
1300 | curr_handler = ex_table[exception]; | |
1301 | ||
1302 | if (curr_handler != ex_replaceable) | |
1303 | return -EBUSY; | |
1304 | ||
1305 | ex_table[exception] = handler; | |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | EXPORT_SYMBOL(bfin_request_exception); | |
1310 | ||
1311 | int bfin_free_exception(unsigned int exception, void (*handler)(void)) | |
1312 | { | |
1313 | void (*curr_handler)(void); | |
1314 | ||
1315 | if (exception > 0x3F) | |
1316 | return -EINVAL; | |
1317 | ||
1318 | curr_handler = ex_table[exception]; | |
1319 | ||
1320 | if (curr_handler != handler) | |
1321 | return -EBUSY; | |
1322 | ||
1323 | ex_table[exception] = ex_replaceable; | |
1324 | ||
1325 | return 0; | |
1326 | } | |
1327 | EXPORT_SYMBOL(bfin_free_exception); | |
1328 | ||
1394f032 BW |
1329 | void panic_cplb_error(int cplb_panic, struct pt_regs *fp) |
1330 | { | |
1331 | switch (cplb_panic) { | |
1332 | case CPLB_NO_UNLOCKED: | |
1333 | printk(KERN_EMERG "All CPLBs are locked\n"); | |
1334 | break; | |
1335 | case CPLB_PROT_VIOL: | |
1336 | return; | |
1337 | case CPLB_NO_ADDR_MATCH: | |
1338 | return; | |
1339 | case CPLB_UNKNOWN_ERR: | |
1340 | printk(KERN_EMERG "Unknown CPLB Exception\n"); | |
1341 | break; | |
1342 | } | |
1343 | ||
226eb1ef RG |
1344 | oops_in_progress = 1; |
1345 | ||
49dce912 | 1346 | dump_bfin_process(fp); |
b03b08ba | 1347 | dump_bfin_mem(fp); |
49dce912 | 1348 | show_regs(fp); |
1394f032 | 1349 | dump_stack(); |
d8804adf | 1350 | panic("Unrecoverable event"); |
1394f032 | 1351 | } |