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dump_stack: consolidate dump_stack() implementations and unify their behaviors
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / sparc / kernel / traps_64.c
1 /* arch/sparc64/kernel/traps.c
2 *
3 * Copyright (C) 1995,1997,2008,2009,2012 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com)
5 */
6
7 /*
8 * I like traps on v9, :))))
9 */
10
11 #include <linux/module.h>
12 #include <linux/sched.h>
13 #include <linux/linkage.h>
14 #include <linux/kernel.h>
15 #include <linux/signal.h>
16 #include <linux/smp.h>
17 #include <linux/mm.h>
18 #include <linux/init.h>
19 #include <linux/kdebug.h>
20 #include <linux/ftrace.h>
21 #include <linux/reboot.h>
22 #include <linux/gfp.h>
23
24 #include <asm/smp.h>
25 #include <asm/delay.h>
26 #include <asm/ptrace.h>
27 #include <asm/oplib.h>
28 #include <asm/page.h>
29 #include <asm/pgtable.h>
30 #include <asm/unistd.h>
31 #include <asm/uaccess.h>
32 #include <asm/fpumacro.h>
33 #include <asm/lsu.h>
34 #include <asm/dcu.h>
35 #include <asm/estate.h>
36 #include <asm/chafsr.h>
37 #include <asm/sfafsr.h>
38 #include <asm/psrcompat.h>
39 #include <asm/processor.h>
40 #include <asm/timer.h>
41 #include <asm/head.h>
42 #include <asm/prom.h>
43 #include <asm/memctrl.h>
44 #include <asm/cacheflush.h>
45
46 #include "entry.h"
47 #include "kstack.h"
48
49 /* When an irrecoverable trap occurs at tl > 0, the trap entry
50 * code logs the trap state registers at every level in the trap
51 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
52 * is as follows:
53 */
54 struct tl1_traplog {
55 struct {
56 unsigned long tstate;
57 unsigned long tpc;
58 unsigned long tnpc;
59 unsigned long tt;
60 } trapstack[4];
61 unsigned long tl;
62 };
63
64 static void dump_tl1_traplog(struct tl1_traplog *p)
65 {
66 int i, limit;
67
68 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
69 "dumping track stack.\n", p->tl);
70
71 limit = (tlb_type == hypervisor) ? 2 : 4;
72 for (i = 0; i < limit; i++) {
73 printk(KERN_EMERG
74 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
75 "TNPC[%016lx] TT[%lx]\n",
76 i + 1,
77 p->trapstack[i].tstate, p->trapstack[i].tpc,
78 p->trapstack[i].tnpc, p->trapstack[i].tt);
79 printk("TRAPLOG: TPC<%pS>\n", (void *) p->trapstack[i].tpc);
80 }
81 }
82
83 void bad_trap(struct pt_regs *regs, long lvl)
84 {
85 char buffer[32];
86 siginfo_t info;
87
88 if (notify_die(DIE_TRAP, "bad trap", regs,
89 0, lvl, SIGTRAP) == NOTIFY_STOP)
90 return;
91
92 if (lvl < 0x100) {
93 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
94 die_if_kernel(buffer, regs);
95 }
96
97 lvl -= 0x100;
98 if (regs->tstate & TSTATE_PRIV) {
99 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
100 die_if_kernel(buffer, regs);
101 }
102 if (test_thread_flag(TIF_32BIT)) {
103 regs->tpc &= 0xffffffff;
104 regs->tnpc &= 0xffffffff;
105 }
106 info.si_signo = SIGILL;
107 info.si_errno = 0;
108 info.si_code = ILL_ILLTRP;
109 info.si_addr = (void __user *)regs->tpc;
110 info.si_trapno = lvl;
111 force_sig_info(SIGILL, &info, current);
112 }
113
114 void bad_trap_tl1(struct pt_regs *regs, long lvl)
115 {
116 char buffer[32];
117
118 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
119 0, lvl, SIGTRAP) == NOTIFY_STOP)
120 return;
121
122 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
123
124 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
125 die_if_kernel (buffer, regs);
126 }
127
128 #ifdef CONFIG_DEBUG_BUGVERBOSE
129 void do_BUG(const char *file, int line)
130 {
131 bust_spinlocks(1);
132 printk("kernel BUG at %s:%d!\n", file, line);
133 }
134 EXPORT_SYMBOL(do_BUG);
135 #endif
136
137 static DEFINE_SPINLOCK(dimm_handler_lock);
138 static dimm_printer_t dimm_handler;
139
140 static int sprintf_dimm(int synd_code, unsigned long paddr, char *buf, int buflen)
141 {
142 unsigned long flags;
143 int ret = -ENODEV;
144
145 spin_lock_irqsave(&dimm_handler_lock, flags);
146 if (dimm_handler) {
147 ret = dimm_handler(synd_code, paddr, buf, buflen);
148 } else if (tlb_type == spitfire) {
149 if (prom_getunumber(synd_code, paddr, buf, buflen) == -1)
150 ret = -EINVAL;
151 else
152 ret = 0;
153 } else
154 ret = -ENODEV;
155 spin_unlock_irqrestore(&dimm_handler_lock, flags);
156
157 return ret;
158 }
159
160 int register_dimm_printer(dimm_printer_t func)
161 {
162 unsigned long flags;
163 int ret = 0;
164
165 spin_lock_irqsave(&dimm_handler_lock, flags);
166 if (!dimm_handler)
167 dimm_handler = func;
168 else
169 ret = -EEXIST;
170 spin_unlock_irqrestore(&dimm_handler_lock, flags);
171
172 return ret;
173 }
174 EXPORT_SYMBOL_GPL(register_dimm_printer);
175
176 void unregister_dimm_printer(dimm_printer_t func)
177 {
178 unsigned long flags;
179
180 spin_lock_irqsave(&dimm_handler_lock, flags);
181 if (dimm_handler == func)
182 dimm_handler = NULL;
183 spin_unlock_irqrestore(&dimm_handler_lock, flags);
184 }
185 EXPORT_SYMBOL_GPL(unregister_dimm_printer);
186
187 void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
188 {
189 siginfo_t info;
190
191 if (notify_die(DIE_TRAP, "instruction access exception", regs,
192 0, 0x8, SIGTRAP) == NOTIFY_STOP)
193 return;
194
195 if (regs->tstate & TSTATE_PRIV) {
196 printk("spitfire_insn_access_exception: SFSR[%016lx] "
197 "SFAR[%016lx], going.\n", sfsr, sfar);
198 die_if_kernel("Iax", regs);
199 }
200 if (test_thread_flag(TIF_32BIT)) {
201 regs->tpc &= 0xffffffff;
202 regs->tnpc &= 0xffffffff;
203 }
204 info.si_signo = SIGSEGV;
205 info.si_errno = 0;
206 info.si_code = SEGV_MAPERR;
207 info.si_addr = (void __user *)regs->tpc;
208 info.si_trapno = 0;
209 force_sig_info(SIGSEGV, &info, current);
210 }
211
212 void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
213 {
214 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
215 0, 0x8, SIGTRAP) == NOTIFY_STOP)
216 return;
217
218 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
219 spitfire_insn_access_exception(regs, sfsr, sfar);
220 }
221
222 void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
223 {
224 unsigned short type = (type_ctx >> 16);
225 unsigned short ctx = (type_ctx & 0xffff);
226 siginfo_t info;
227
228 if (notify_die(DIE_TRAP, "instruction access exception", regs,
229 0, 0x8, SIGTRAP) == NOTIFY_STOP)
230 return;
231
232 if (regs->tstate & TSTATE_PRIV) {
233 printk("sun4v_insn_access_exception: ADDR[%016lx] "
234 "CTX[%04x] TYPE[%04x], going.\n",
235 addr, ctx, type);
236 die_if_kernel("Iax", regs);
237 }
238
239 if (test_thread_flag(TIF_32BIT)) {
240 regs->tpc &= 0xffffffff;
241 regs->tnpc &= 0xffffffff;
242 }
243 info.si_signo = SIGSEGV;
244 info.si_errno = 0;
245 info.si_code = SEGV_MAPERR;
246 info.si_addr = (void __user *) addr;
247 info.si_trapno = 0;
248 force_sig_info(SIGSEGV, &info, current);
249 }
250
251 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
252 {
253 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
254 0, 0x8, SIGTRAP) == NOTIFY_STOP)
255 return;
256
257 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
258 sun4v_insn_access_exception(regs, addr, type_ctx);
259 }
260
261 void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
262 {
263 siginfo_t info;
264
265 if (notify_die(DIE_TRAP, "data access exception", regs,
266 0, 0x30, SIGTRAP) == NOTIFY_STOP)
267 return;
268
269 if (regs->tstate & TSTATE_PRIV) {
270 /* Test if this comes from uaccess places. */
271 const struct exception_table_entry *entry;
272
273 entry = search_exception_tables(regs->tpc);
274 if (entry) {
275 /* Ouch, somebody is trying VM hole tricks on us... */
276 #ifdef DEBUG_EXCEPTIONS
277 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
278 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
279 regs->tpc, entry->fixup);
280 #endif
281 regs->tpc = entry->fixup;
282 regs->tnpc = regs->tpc + 4;
283 return;
284 }
285 /* Shit... */
286 printk("spitfire_data_access_exception: SFSR[%016lx] "
287 "SFAR[%016lx], going.\n", sfsr, sfar);
288 die_if_kernel("Dax", regs);
289 }
290
291 info.si_signo = SIGSEGV;
292 info.si_errno = 0;
293 info.si_code = SEGV_MAPERR;
294 info.si_addr = (void __user *)sfar;
295 info.si_trapno = 0;
296 force_sig_info(SIGSEGV, &info, current);
297 }
298
299 void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
300 {
301 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
302 0, 0x30, SIGTRAP) == NOTIFY_STOP)
303 return;
304
305 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
306 spitfire_data_access_exception(regs, sfsr, sfar);
307 }
308
309 void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
310 {
311 unsigned short type = (type_ctx >> 16);
312 unsigned short ctx = (type_ctx & 0xffff);
313 siginfo_t info;
314
315 if (notify_die(DIE_TRAP, "data access exception", regs,
316 0, 0x8, SIGTRAP) == NOTIFY_STOP)
317 return;
318
319 if (regs->tstate & TSTATE_PRIV) {
320 /* Test if this comes from uaccess places. */
321 const struct exception_table_entry *entry;
322
323 entry = search_exception_tables(regs->tpc);
324 if (entry) {
325 /* Ouch, somebody is trying VM hole tricks on us... */
326 #ifdef DEBUG_EXCEPTIONS
327 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
328 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
329 regs->tpc, entry->fixup);
330 #endif
331 regs->tpc = entry->fixup;
332 regs->tnpc = regs->tpc + 4;
333 return;
334 }
335 printk("sun4v_data_access_exception: ADDR[%016lx] "
336 "CTX[%04x] TYPE[%04x], going.\n",
337 addr, ctx, type);
338 die_if_kernel("Dax", regs);
339 }
340
341 if (test_thread_flag(TIF_32BIT)) {
342 regs->tpc &= 0xffffffff;
343 regs->tnpc &= 0xffffffff;
344 }
345 info.si_signo = SIGSEGV;
346 info.si_errno = 0;
347 info.si_code = SEGV_MAPERR;
348 info.si_addr = (void __user *) addr;
349 info.si_trapno = 0;
350 force_sig_info(SIGSEGV, &info, current);
351 }
352
353 void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
354 {
355 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
356 0, 0x8, SIGTRAP) == NOTIFY_STOP)
357 return;
358
359 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
360 sun4v_data_access_exception(regs, addr, type_ctx);
361 }
362
363 #ifdef CONFIG_PCI
364 #include "pci_impl.h"
365 #endif
366
367 /* When access exceptions happen, we must do this. */
368 static void spitfire_clean_and_reenable_l1_caches(void)
369 {
370 unsigned long va;
371
372 if (tlb_type != spitfire)
373 BUG();
374
375 /* Clean 'em. */
376 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
377 spitfire_put_icache_tag(va, 0x0);
378 spitfire_put_dcache_tag(va, 0x0);
379 }
380
381 /* Re-enable in LSU. */
382 __asm__ __volatile__("flush %%g6\n\t"
383 "membar #Sync\n\t"
384 "stxa %0, [%%g0] %1\n\t"
385 "membar #Sync"
386 : /* no outputs */
387 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
388 LSU_CONTROL_IM | LSU_CONTROL_DM),
389 "i" (ASI_LSU_CONTROL)
390 : "memory");
391 }
392
393 static void spitfire_enable_estate_errors(void)
394 {
395 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
396 "membar #Sync"
397 : /* no outputs */
398 : "r" (ESTATE_ERR_ALL),
399 "i" (ASI_ESTATE_ERROR_EN));
400 }
401
402 static char ecc_syndrome_table[] = {
403 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
404 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
405 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
406 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
407 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
408 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
409 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
410 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
411 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
412 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
413 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
414 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
415 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
416 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
417 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
418 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
419 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
420 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
421 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
422 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
423 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
424 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
425 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
426 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
427 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
428 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
429 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
430 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
431 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
432 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
433 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
434 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
435 };
436
437 static char *syndrome_unknown = "<Unknown>";
438
439 static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
440 {
441 unsigned short scode;
442 char memmod_str[64], *p;
443
444 if (udbl & bit) {
445 scode = ecc_syndrome_table[udbl & 0xff];
446 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
447 p = syndrome_unknown;
448 else
449 p = memmod_str;
450 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
451 "Memory Module \"%s\"\n",
452 smp_processor_id(), scode, p);
453 }
454
455 if (udbh & bit) {
456 scode = ecc_syndrome_table[udbh & 0xff];
457 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
458 p = syndrome_unknown;
459 else
460 p = memmod_str;
461 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
462 "Memory Module \"%s\"\n",
463 smp_processor_id(), scode, p);
464 }
465
466 }
467
468 static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
469 {
470
471 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
472 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
473 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
474
475 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
476
477 /* We always log it, even if someone is listening for this
478 * trap.
479 */
480 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
481 0, TRAP_TYPE_CEE, SIGTRAP);
482
483 /* The Correctable ECC Error trap does not disable I/D caches. So
484 * we only have to restore the ESTATE Error Enable register.
485 */
486 spitfire_enable_estate_errors();
487 }
488
489 static void spitfire_ue_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long tt, int tl1, struct pt_regs *regs)
490 {
491 siginfo_t info;
492
493 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
494 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
495 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
496
497 /* XXX add more human friendly logging of the error status
498 * XXX as is implemented for cheetah
499 */
500
501 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
502
503 /* We always log it, even if someone is listening for this
504 * trap.
505 */
506 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
507 0, tt, SIGTRAP);
508
509 if (regs->tstate & TSTATE_PRIV) {
510 if (tl1)
511 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
512 die_if_kernel("UE", regs);
513 }
514
515 /* XXX need more intelligent processing here, such as is implemented
516 * XXX for cheetah errors, in fact if the E-cache still holds the
517 * XXX line with bad parity this will loop
518 */
519
520 spitfire_clean_and_reenable_l1_caches();
521 spitfire_enable_estate_errors();
522
523 if (test_thread_flag(TIF_32BIT)) {
524 regs->tpc &= 0xffffffff;
525 regs->tnpc &= 0xffffffff;
526 }
527 info.si_signo = SIGBUS;
528 info.si_errno = 0;
529 info.si_code = BUS_OBJERR;
530 info.si_addr = (void *)0;
531 info.si_trapno = 0;
532 force_sig_info(SIGBUS, &info, current);
533 }
534
535 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
536 {
537 unsigned long afsr, tt, udbh, udbl;
538 int tl1;
539
540 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
541 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
542 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
543 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
544 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
545
546 #ifdef CONFIG_PCI
547 if (tt == TRAP_TYPE_DAE &&
548 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
549 spitfire_clean_and_reenable_l1_caches();
550 spitfire_enable_estate_errors();
551
552 pci_poke_faulted = 1;
553 regs->tnpc = regs->tpc + 4;
554 return;
555 }
556 #endif
557
558 if (afsr & SFAFSR_UE)
559 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
560
561 if (tt == TRAP_TYPE_CEE) {
562 /* Handle the case where we took a CEE trap, but ACK'd
563 * only the UE state in the UDB error registers.
564 */
565 if (afsr & SFAFSR_UE) {
566 if (udbh & UDBE_CE) {
567 __asm__ __volatile__(
568 "stxa %0, [%1] %2\n\t"
569 "membar #Sync"
570 : /* no outputs */
571 : "r" (udbh & UDBE_CE),
572 "r" (0x0), "i" (ASI_UDB_ERROR_W));
573 }
574 if (udbl & UDBE_CE) {
575 __asm__ __volatile__(
576 "stxa %0, [%1] %2\n\t"
577 "membar #Sync"
578 : /* no outputs */
579 : "r" (udbl & UDBE_CE),
580 "r" (0x18), "i" (ASI_UDB_ERROR_W));
581 }
582 }
583
584 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
585 }
586 }
587
588 int cheetah_pcache_forced_on;
589
590 void cheetah_enable_pcache(void)
591 {
592 unsigned long dcr;
593
594 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
595 smp_processor_id());
596
597 __asm__ __volatile__("ldxa [%%g0] %1, %0"
598 : "=r" (dcr)
599 : "i" (ASI_DCU_CONTROL_REG));
600 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
601 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
602 "membar #Sync"
603 : /* no outputs */
604 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
605 }
606
607 /* Cheetah error trap handling. */
608 static unsigned long ecache_flush_physbase;
609 static unsigned long ecache_flush_linesize;
610 static unsigned long ecache_flush_size;
611
612 /* This table is ordered in priority of errors and matches the
613 * AFAR overwrite policy as well.
614 */
615
616 struct afsr_error_table {
617 unsigned long mask;
618 const char *name;
619 };
620
621 static const char CHAFSR_PERR_msg[] =
622 "System interface protocol error";
623 static const char CHAFSR_IERR_msg[] =
624 "Internal processor error";
625 static const char CHAFSR_ISAP_msg[] =
626 "System request parity error on incoming address";
627 static const char CHAFSR_UCU_msg[] =
628 "Uncorrectable E-cache ECC error for ifetch/data";
629 static const char CHAFSR_UCC_msg[] =
630 "SW Correctable E-cache ECC error for ifetch/data";
631 static const char CHAFSR_UE_msg[] =
632 "Uncorrectable system bus data ECC error for read";
633 static const char CHAFSR_EDU_msg[] =
634 "Uncorrectable E-cache ECC error for stmerge/blkld";
635 static const char CHAFSR_EMU_msg[] =
636 "Uncorrectable system bus MTAG error";
637 static const char CHAFSR_WDU_msg[] =
638 "Uncorrectable E-cache ECC error for writeback";
639 static const char CHAFSR_CPU_msg[] =
640 "Uncorrectable ECC error for copyout";
641 static const char CHAFSR_CE_msg[] =
642 "HW corrected system bus data ECC error for read";
643 static const char CHAFSR_EDC_msg[] =
644 "HW corrected E-cache ECC error for stmerge/blkld";
645 static const char CHAFSR_EMC_msg[] =
646 "HW corrected system bus MTAG ECC error";
647 static const char CHAFSR_WDC_msg[] =
648 "HW corrected E-cache ECC error for writeback";
649 static const char CHAFSR_CPC_msg[] =
650 "HW corrected ECC error for copyout";
651 static const char CHAFSR_TO_msg[] =
652 "Unmapped error from system bus";
653 static const char CHAFSR_BERR_msg[] =
654 "Bus error response from system bus";
655 static const char CHAFSR_IVC_msg[] =
656 "HW corrected system bus data ECC error for ivec read";
657 static const char CHAFSR_IVU_msg[] =
658 "Uncorrectable system bus data ECC error for ivec read";
659 static struct afsr_error_table __cheetah_error_table[] = {
660 { CHAFSR_PERR, CHAFSR_PERR_msg },
661 { CHAFSR_IERR, CHAFSR_IERR_msg },
662 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
663 { CHAFSR_UCU, CHAFSR_UCU_msg },
664 { CHAFSR_UCC, CHAFSR_UCC_msg },
665 { CHAFSR_UE, CHAFSR_UE_msg },
666 { CHAFSR_EDU, CHAFSR_EDU_msg },
667 { CHAFSR_EMU, CHAFSR_EMU_msg },
668 { CHAFSR_WDU, CHAFSR_WDU_msg },
669 { CHAFSR_CPU, CHAFSR_CPU_msg },
670 { CHAFSR_CE, CHAFSR_CE_msg },
671 { CHAFSR_EDC, CHAFSR_EDC_msg },
672 { CHAFSR_EMC, CHAFSR_EMC_msg },
673 { CHAFSR_WDC, CHAFSR_WDC_msg },
674 { CHAFSR_CPC, CHAFSR_CPC_msg },
675 { CHAFSR_TO, CHAFSR_TO_msg },
676 { CHAFSR_BERR, CHAFSR_BERR_msg },
677 /* These two do not update the AFAR. */
678 { CHAFSR_IVC, CHAFSR_IVC_msg },
679 { CHAFSR_IVU, CHAFSR_IVU_msg },
680 { 0, NULL },
681 };
682 static const char CHPAFSR_DTO_msg[] =
683 "System bus unmapped error for prefetch/storequeue-read";
684 static const char CHPAFSR_DBERR_msg[] =
685 "System bus error for prefetch/storequeue-read";
686 static const char CHPAFSR_THCE_msg[] =
687 "Hardware corrected E-cache Tag ECC error";
688 static const char CHPAFSR_TSCE_msg[] =
689 "SW handled correctable E-cache Tag ECC error";
690 static const char CHPAFSR_TUE_msg[] =
691 "Uncorrectable E-cache Tag ECC error";
692 static const char CHPAFSR_DUE_msg[] =
693 "System bus uncorrectable data ECC error due to prefetch/store-fill";
694 static struct afsr_error_table __cheetah_plus_error_table[] = {
695 { CHAFSR_PERR, CHAFSR_PERR_msg },
696 { CHAFSR_IERR, CHAFSR_IERR_msg },
697 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
698 { CHAFSR_UCU, CHAFSR_UCU_msg },
699 { CHAFSR_UCC, CHAFSR_UCC_msg },
700 { CHAFSR_UE, CHAFSR_UE_msg },
701 { CHAFSR_EDU, CHAFSR_EDU_msg },
702 { CHAFSR_EMU, CHAFSR_EMU_msg },
703 { CHAFSR_WDU, CHAFSR_WDU_msg },
704 { CHAFSR_CPU, CHAFSR_CPU_msg },
705 { CHAFSR_CE, CHAFSR_CE_msg },
706 { CHAFSR_EDC, CHAFSR_EDC_msg },
707 { CHAFSR_EMC, CHAFSR_EMC_msg },
708 { CHAFSR_WDC, CHAFSR_WDC_msg },
709 { CHAFSR_CPC, CHAFSR_CPC_msg },
710 { CHAFSR_TO, CHAFSR_TO_msg },
711 { CHAFSR_BERR, CHAFSR_BERR_msg },
712 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
713 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
714 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
715 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
716 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
717 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
718 /* These two do not update the AFAR. */
719 { CHAFSR_IVC, CHAFSR_IVC_msg },
720 { CHAFSR_IVU, CHAFSR_IVU_msg },
721 { 0, NULL },
722 };
723 static const char JPAFSR_JETO_msg[] =
724 "System interface protocol error, hw timeout caused";
725 static const char JPAFSR_SCE_msg[] =
726 "Parity error on system snoop results";
727 static const char JPAFSR_JEIC_msg[] =
728 "System interface protocol error, illegal command detected";
729 static const char JPAFSR_JEIT_msg[] =
730 "System interface protocol error, illegal ADTYPE detected";
731 static const char JPAFSR_OM_msg[] =
732 "Out of range memory error has occurred";
733 static const char JPAFSR_ETP_msg[] =
734 "Parity error on L2 cache tag SRAM";
735 static const char JPAFSR_UMS_msg[] =
736 "Error due to unsupported store";
737 static const char JPAFSR_RUE_msg[] =
738 "Uncorrectable ECC error from remote cache/memory";
739 static const char JPAFSR_RCE_msg[] =
740 "Correctable ECC error from remote cache/memory";
741 static const char JPAFSR_BP_msg[] =
742 "JBUS parity error on returned read data";
743 static const char JPAFSR_WBP_msg[] =
744 "JBUS parity error on data for writeback or block store";
745 static const char JPAFSR_FRC_msg[] =
746 "Foreign read to DRAM incurring correctable ECC error";
747 static const char JPAFSR_FRU_msg[] =
748 "Foreign read to DRAM incurring uncorrectable ECC error";
749 static struct afsr_error_table __jalapeno_error_table[] = {
750 { JPAFSR_JETO, JPAFSR_JETO_msg },
751 { JPAFSR_SCE, JPAFSR_SCE_msg },
752 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
753 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
754 { CHAFSR_PERR, CHAFSR_PERR_msg },
755 { CHAFSR_IERR, CHAFSR_IERR_msg },
756 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
757 { CHAFSR_UCU, CHAFSR_UCU_msg },
758 { CHAFSR_UCC, CHAFSR_UCC_msg },
759 { CHAFSR_UE, CHAFSR_UE_msg },
760 { CHAFSR_EDU, CHAFSR_EDU_msg },
761 { JPAFSR_OM, JPAFSR_OM_msg },
762 { CHAFSR_WDU, CHAFSR_WDU_msg },
763 { CHAFSR_CPU, CHAFSR_CPU_msg },
764 { CHAFSR_CE, CHAFSR_CE_msg },
765 { CHAFSR_EDC, CHAFSR_EDC_msg },
766 { JPAFSR_ETP, JPAFSR_ETP_msg },
767 { CHAFSR_WDC, CHAFSR_WDC_msg },
768 { CHAFSR_CPC, CHAFSR_CPC_msg },
769 { CHAFSR_TO, CHAFSR_TO_msg },
770 { CHAFSR_BERR, CHAFSR_BERR_msg },
771 { JPAFSR_UMS, JPAFSR_UMS_msg },
772 { JPAFSR_RUE, JPAFSR_RUE_msg },
773 { JPAFSR_RCE, JPAFSR_RCE_msg },
774 { JPAFSR_BP, JPAFSR_BP_msg },
775 { JPAFSR_WBP, JPAFSR_WBP_msg },
776 { JPAFSR_FRC, JPAFSR_FRC_msg },
777 { JPAFSR_FRU, JPAFSR_FRU_msg },
778 /* These two do not update the AFAR. */
779 { CHAFSR_IVU, CHAFSR_IVU_msg },
780 { 0, NULL },
781 };
782 static struct afsr_error_table *cheetah_error_table;
783 static unsigned long cheetah_afsr_errors;
784
785 struct cheetah_err_info *cheetah_error_log;
786
787 static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
788 {
789 struct cheetah_err_info *p;
790 int cpu = smp_processor_id();
791
792 if (!cheetah_error_log)
793 return NULL;
794
795 p = cheetah_error_log + (cpu * 2);
796 if ((afsr & CHAFSR_TL1) != 0UL)
797 p++;
798
799 return p;
800 }
801
802 extern unsigned int tl0_icpe[], tl1_icpe[];
803 extern unsigned int tl0_dcpe[], tl1_dcpe[];
804 extern unsigned int tl0_fecc[], tl1_fecc[];
805 extern unsigned int tl0_cee[], tl1_cee[];
806 extern unsigned int tl0_iae[], tl1_iae[];
807 extern unsigned int tl0_dae[], tl1_dae[];
808 extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
809 extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
810 extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
811 extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
812 extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
813
814 void __init cheetah_ecache_flush_init(void)
815 {
816 unsigned long largest_size, smallest_linesize, order, ver;
817 int i, sz;
818
819 /* Scan all cpu device tree nodes, note two values:
820 * 1) largest E-cache size
821 * 2) smallest E-cache line size
822 */
823 largest_size = 0UL;
824 smallest_linesize = ~0UL;
825
826 for (i = 0; i < NR_CPUS; i++) {
827 unsigned long val;
828
829 val = cpu_data(i).ecache_size;
830 if (!val)
831 continue;
832
833 if (val > largest_size)
834 largest_size = val;
835
836 val = cpu_data(i).ecache_line_size;
837 if (val < smallest_linesize)
838 smallest_linesize = val;
839
840 }
841
842 if (largest_size == 0UL || smallest_linesize == ~0UL) {
843 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
844 "parameters.\n");
845 prom_halt();
846 }
847
848 ecache_flush_size = (2 * largest_size);
849 ecache_flush_linesize = smallest_linesize;
850
851 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
852
853 if (ecache_flush_physbase == ~0UL) {
854 prom_printf("cheetah_ecache_flush_init: Cannot find %ld byte "
855 "contiguous physical memory.\n",
856 ecache_flush_size);
857 prom_halt();
858 }
859
860 /* Now allocate error trap reporting scoreboard. */
861 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
862 for (order = 0; order < MAX_ORDER; order++) {
863 if ((PAGE_SIZE << order) >= sz)
864 break;
865 }
866 cheetah_error_log = (struct cheetah_err_info *)
867 __get_free_pages(GFP_KERNEL, order);
868 if (!cheetah_error_log) {
869 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
870 "error logging scoreboard (%d bytes).\n", sz);
871 prom_halt();
872 }
873 memset(cheetah_error_log, 0, PAGE_SIZE << order);
874
875 /* Mark all AFSRs as invalid so that the trap handler will
876 * log new new information there.
877 */
878 for (i = 0; i < 2 * NR_CPUS; i++)
879 cheetah_error_log[i].afsr = CHAFSR_INVALID;
880
881 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
882 if ((ver >> 32) == __JALAPENO_ID ||
883 (ver >> 32) == __SERRANO_ID) {
884 cheetah_error_table = &__jalapeno_error_table[0];
885 cheetah_afsr_errors = JPAFSR_ERRORS;
886 } else if ((ver >> 32) == 0x003e0015) {
887 cheetah_error_table = &__cheetah_plus_error_table[0];
888 cheetah_afsr_errors = CHPAFSR_ERRORS;
889 } else {
890 cheetah_error_table = &__cheetah_error_table[0];
891 cheetah_afsr_errors = CHAFSR_ERRORS;
892 }
893
894 /* Now patch trap tables. */
895 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
896 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
897 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
898 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
899 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
900 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
901 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
902 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
903 if (tlb_type == cheetah_plus) {
904 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
905 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
906 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
907 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
908 }
909 flushi(PAGE_OFFSET);
910 }
911
912 static void cheetah_flush_ecache(void)
913 {
914 unsigned long flush_base = ecache_flush_physbase;
915 unsigned long flush_linesize = ecache_flush_linesize;
916 unsigned long flush_size = ecache_flush_size;
917
918 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
919 " bne,pt %%xcc, 1b\n\t"
920 " ldxa [%2 + %0] %3, %%g0\n\t"
921 : "=&r" (flush_size)
922 : "0" (flush_size), "r" (flush_base),
923 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
924 }
925
926 static void cheetah_flush_ecache_line(unsigned long physaddr)
927 {
928 unsigned long alias;
929
930 physaddr &= ~(8UL - 1UL);
931 physaddr = (ecache_flush_physbase +
932 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
933 alias = physaddr + (ecache_flush_size >> 1UL);
934 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
935 "ldxa [%1] %2, %%g0\n\t"
936 "membar #Sync"
937 : /* no outputs */
938 : "r" (physaddr), "r" (alias),
939 "i" (ASI_PHYS_USE_EC));
940 }
941
942 /* Unfortunately, the diagnostic access to the I-cache tags we need to
943 * use to clear the thing interferes with I-cache coherency transactions.
944 *
945 * So we must only flush the I-cache when it is disabled.
946 */
947 static void __cheetah_flush_icache(void)
948 {
949 unsigned int icache_size, icache_line_size;
950 unsigned long addr;
951
952 icache_size = local_cpu_data().icache_size;
953 icache_line_size = local_cpu_data().icache_line_size;
954
955 /* Clear the valid bits in all the tags. */
956 for (addr = 0; addr < icache_size; addr += icache_line_size) {
957 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
958 "membar #Sync"
959 : /* no outputs */
960 : "r" (addr | (2 << 3)),
961 "i" (ASI_IC_TAG));
962 }
963 }
964
965 static void cheetah_flush_icache(void)
966 {
967 unsigned long dcu_save;
968
969 /* Save current DCU, disable I-cache. */
970 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
971 "or %0, %2, %%g1\n\t"
972 "stxa %%g1, [%%g0] %1\n\t"
973 "membar #Sync"
974 : "=r" (dcu_save)
975 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
976 : "g1");
977
978 __cheetah_flush_icache();
979
980 /* Restore DCU register */
981 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
982 "membar #Sync"
983 : /* no outputs */
984 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
985 }
986
987 static void cheetah_flush_dcache(void)
988 {
989 unsigned int dcache_size, dcache_line_size;
990 unsigned long addr;
991
992 dcache_size = local_cpu_data().dcache_size;
993 dcache_line_size = local_cpu_data().dcache_line_size;
994
995 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
996 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
997 "membar #Sync"
998 : /* no outputs */
999 : "r" (addr), "i" (ASI_DCACHE_TAG));
1000 }
1001 }
1002
1003 /* In order to make the even parity correct we must do two things.
1004 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
1005 * Next, we clear out all 32-bytes of data for that line. Data of
1006 * all-zero + tag parity value of zero == correct parity.
1007 */
1008 static void cheetah_plus_zap_dcache_parity(void)
1009 {
1010 unsigned int dcache_size, dcache_line_size;
1011 unsigned long addr;
1012
1013 dcache_size = local_cpu_data().dcache_size;
1014 dcache_line_size = local_cpu_data().dcache_line_size;
1015
1016 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1017 unsigned long tag = (addr >> 14);
1018 unsigned long line;
1019
1020 __asm__ __volatile__("membar #Sync\n\t"
1021 "stxa %0, [%1] %2\n\t"
1022 "membar #Sync"
1023 : /* no outputs */
1024 : "r" (tag), "r" (addr),
1025 "i" (ASI_DCACHE_UTAG));
1026 for (line = addr; line < addr + dcache_line_size; line += 8)
1027 __asm__ __volatile__("membar #Sync\n\t"
1028 "stxa %%g0, [%0] %1\n\t"
1029 "membar #Sync"
1030 : /* no outputs */
1031 : "r" (line),
1032 "i" (ASI_DCACHE_DATA));
1033 }
1034 }
1035
1036 /* Conversion tables used to frob Cheetah AFSR syndrome values into
1037 * something palatable to the memory controller driver get_unumber
1038 * routine.
1039 */
1040 #define MT0 137
1041 #define MT1 138
1042 #define MT2 139
1043 #define NONE 254
1044 #define MTC0 140
1045 #define MTC1 141
1046 #define MTC2 142
1047 #define MTC3 143
1048 #define C0 128
1049 #define C1 129
1050 #define C2 130
1051 #define C3 131
1052 #define C4 132
1053 #define C5 133
1054 #define C6 134
1055 #define C7 135
1056 #define C8 136
1057 #define M2 144
1058 #define M3 145
1059 #define M4 146
1060 #define M 147
1061 static unsigned char cheetah_ecc_syntab[] = {
1062 /*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1063 /*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1064 /*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1065 /*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1066 /*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1067 /*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1068 /*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1069 /*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1070 /*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1071 /*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1072 /*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1073 /*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1074 /*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1075 /*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1076 /*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1077 /*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1078 /*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1079 /*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1080 /*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1081 /*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1082 /*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1083 /*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1084 /*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1085 /*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1086 /*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1087 /*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1088 /*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1089 /*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1090 /*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1091 /*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1092 /*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1093 /*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1094 };
1095 static unsigned char cheetah_mtag_syntab[] = {
1096 NONE, MTC0,
1097 MTC1, NONE,
1098 MTC2, NONE,
1099 NONE, MT0,
1100 MTC3, NONE,
1101 NONE, MT1,
1102 NONE, MT2,
1103 NONE, NONE
1104 };
1105
1106 /* Return the highest priority error conditon mentioned. */
1107 static inline unsigned long cheetah_get_hipri(unsigned long afsr)
1108 {
1109 unsigned long tmp = 0;
1110 int i;
1111
1112 for (i = 0; cheetah_error_table[i].mask; i++) {
1113 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1114 return tmp;
1115 }
1116 return tmp;
1117 }
1118
1119 static const char *cheetah_get_string(unsigned long bit)
1120 {
1121 int i;
1122
1123 for (i = 0; cheetah_error_table[i].mask; i++) {
1124 if ((bit & cheetah_error_table[i].mask) != 0UL)
1125 return cheetah_error_table[i].name;
1126 }
1127 return "???";
1128 }
1129
1130 static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1131 unsigned long afsr, unsigned long afar, int recoverable)
1132 {
1133 unsigned long hipri;
1134 char unum[256];
1135
1136 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1137 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1138 afsr, afar,
1139 (afsr & CHAFSR_TL1) ? 1 : 0);
1140 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1141 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1142 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1143 printk("%s" "ERROR(%d): ",
1144 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1145 printk("TPC<%pS>\n", (void *) regs->tpc);
1146 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1147 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1148 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1149 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1150 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1151 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1152 hipri = cheetah_get_hipri(afsr);
1153 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1154 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1155 hipri, cheetah_get_string(hipri));
1156
1157 /* Try to get unumber if relevant. */
1158 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1159 CHAFSR_CPC | CHAFSR_CPU | \
1160 CHAFSR_UE | CHAFSR_CE | \
1161 CHAFSR_EDC | CHAFSR_EDU | \
1162 CHAFSR_UCC | CHAFSR_UCU | \
1163 CHAFSR_WDU | CHAFSR_WDC)
1164 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1165 if (afsr & ESYND_ERRORS) {
1166 int syndrome;
1167 int ret;
1168
1169 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1170 syndrome = cheetah_ecc_syntab[syndrome];
1171 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1172 if (ret != -1)
1173 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1174 (recoverable ? KERN_WARNING : KERN_CRIT),
1175 smp_processor_id(), unum);
1176 } else if (afsr & MSYND_ERRORS) {
1177 int syndrome;
1178 int ret;
1179
1180 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1181 syndrome = cheetah_mtag_syntab[syndrome];
1182 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1183 if (ret != -1)
1184 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1185 (recoverable ? KERN_WARNING : KERN_CRIT),
1186 smp_processor_id(), unum);
1187 }
1188
1189 /* Now dump the cache snapshots. */
1190 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx]\n",
1191 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1192 (int) info->dcache_index,
1193 info->dcache_tag,
1194 info->dcache_utag,
1195 info->dcache_stag);
1196 printk("%s" "ERROR(%d): D-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1197 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1198 info->dcache_data[0],
1199 info->dcache_data[1],
1200 info->dcache_data[2],
1201 info->dcache_data[3]);
1202 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx] "
1203 "u[%016llx] l[%016llx]\n",
1204 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1205 (int) info->icache_index,
1206 info->icache_tag,
1207 info->icache_utag,
1208 info->icache_stag,
1209 info->icache_upper,
1210 info->icache_lower);
1211 printk("%s" "ERROR(%d): I-cache INSN0[%016llx] INSN1[%016llx] INSN2[%016llx] INSN3[%016llx]\n",
1212 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1213 info->icache_data[0],
1214 info->icache_data[1],
1215 info->icache_data[2],
1216 info->icache_data[3]);
1217 printk("%s" "ERROR(%d): I-cache INSN4[%016llx] INSN5[%016llx] INSN6[%016llx] INSN7[%016llx]\n",
1218 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1219 info->icache_data[4],
1220 info->icache_data[5],
1221 info->icache_data[6],
1222 info->icache_data[7]);
1223 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016llx]\n",
1224 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1225 (int) info->ecache_index, info->ecache_tag);
1226 printk("%s" "ERROR(%d): E-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1227 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1228 info->ecache_data[0],
1229 info->ecache_data[1],
1230 info->ecache_data[2],
1231 info->ecache_data[3]);
1232
1233 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1234 while (afsr != 0UL) {
1235 unsigned long bit = cheetah_get_hipri(afsr);
1236
1237 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1238 (recoverable ? KERN_WARNING : KERN_CRIT),
1239 bit, cheetah_get_string(bit));
1240
1241 afsr &= ~bit;
1242 }
1243
1244 if (!recoverable)
1245 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1246 }
1247
1248 static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1249 {
1250 unsigned long afsr, afar;
1251 int ret = 0;
1252
1253 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1254 : "=r" (afsr)
1255 : "i" (ASI_AFSR));
1256 if ((afsr & cheetah_afsr_errors) != 0) {
1257 if (logp != NULL) {
1258 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1259 : "=r" (afar)
1260 : "i" (ASI_AFAR));
1261 logp->afsr = afsr;
1262 logp->afar = afar;
1263 }
1264 ret = 1;
1265 }
1266 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1267 "membar #Sync\n\t"
1268 : : "r" (afsr), "i" (ASI_AFSR));
1269
1270 return ret;
1271 }
1272
1273 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1274 {
1275 struct cheetah_err_info local_snapshot, *p;
1276 int recoverable;
1277
1278 /* Flush E-cache */
1279 cheetah_flush_ecache();
1280
1281 p = cheetah_get_error_log(afsr);
1282 if (!p) {
1283 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1284 afsr, afar);
1285 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1286 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1287 prom_halt();
1288 }
1289
1290 /* Grab snapshot of logged error. */
1291 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1292
1293 /* If the current trap snapshot does not match what the
1294 * trap handler passed along into our args, big trouble.
1295 * In such a case, mark the local copy as invalid.
1296 *
1297 * Else, it matches and we mark the afsr in the non-local
1298 * copy as invalid so we may log new error traps there.
1299 */
1300 if (p->afsr != afsr || p->afar != afar)
1301 local_snapshot.afsr = CHAFSR_INVALID;
1302 else
1303 p->afsr = CHAFSR_INVALID;
1304
1305 cheetah_flush_icache();
1306 cheetah_flush_dcache();
1307
1308 /* Re-enable I-cache/D-cache */
1309 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1310 "or %%g1, %1, %%g1\n\t"
1311 "stxa %%g1, [%%g0] %0\n\t"
1312 "membar #Sync"
1313 : /* no outputs */
1314 : "i" (ASI_DCU_CONTROL_REG),
1315 "i" (DCU_DC | DCU_IC)
1316 : "g1");
1317
1318 /* Re-enable error reporting */
1319 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1320 "or %%g1, %1, %%g1\n\t"
1321 "stxa %%g1, [%%g0] %0\n\t"
1322 "membar #Sync"
1323 : /* no outputs */
1324 : "i" (ASI_ESTATE_ERROR_EN),
1325 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1326 : "g1");
1327
1328 /* Decide if we can continue after handling this trap and
1329 * logging the error.
1330 */
1331 recoverable = 1;
1332 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1333 recoverable = 0;
1334
1335 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1336 * error was logged while we had error reporting traps disabled.
1337 */
1338 if (cheetah_recheck_errors(&local_snapshot)) {
1339 unsigned long new_afsr = local_snapshot.afsr;
1340
1341 /* If we got a new asynchronous error, die... */
1342 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1343 CHAFSR_WDU | CHAFSR_CPU |
1344 CHAFSR_IVU | CHAFSR_UE |
1345 CHAFSR_BERR | CHAFSR_TO))
1346 recoverable = 0;
1347 }
1348
1349 /* Log errors. */
1350 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1351
1352 if (!recoverable)
1353 panic("Irrecoverable Fast-ECC error trap.\n");
1354
1355 /* Flush E-cache to kick the error trap handlers out. */
1356 cheetah_flush_ecache();
1357 }
1358
1359 /* Try to fix a correctable error by pushing the line out from
1360 * the E-cache. Recheck error reporting registers to see if the
1361 * problem is intermittent.
1362 */
1363 static int cheetah_fix_ce(unsigned long physaddr)
1364 {
1365 unsigned long orig_estate;
1366 unsigned long alias1, alias2;
1367 int ret;
1368
1369 /* Make sure correctable error traps are disabled. */
1370 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1371 "andn %0, %1, %%g1\n\t"
1372 "stxa %%g1, [%%g0] %2\n\t"
1373 "membar #Sync"
1374 : "=&r" (orig_estate)
1375 : "i" (ESTATE_ERROR_CEEN),
1376 "i" (ASI_ESTATE_ERROR_EN)
1377 : "g1");
1378
1379 /* We calculate alias addresses that will force the
1380 * cache line in question out of the E-cache. Then
1381 * we bring it back in with an atomic instruction so
1382 * that we get it in some modified/exclusive state,
1383 * then we displace it again to try and get proper ECC
1384 * pushed back into the system.
1385 */
1386 physaddr &= ~(8UL - 1UL);
1387 alias1 = (ecache_flush_physbase +
1388 (physaddr & ((ecache_flush_size >> 1) - 1)));
1389 alias2 = alias1 + (ecache_flush_size >> 1);
1390 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1391 "ldxa [%1] %3, %%g0\n\t"
1392 "casxa [%2] %3, %%g0, %%g0\n\t"
1393 "ldxa [%0] %3, %%g0\n\t"
1394 "ldxa [%1] %3, %%g0\n\t"
1395 "membar #Sync"
1396 : /* no outputs */
1397 : "r" (alias1), "r" (alias2),
1398 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1399
1400 /* Did that trigger another error? */
1401 if (cheetah_recheck_errors(NULL)) {
1402 /* Try one more time. */
1403 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1404 "membar #Sync"
1405 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1406 if (cheetah_recheck_errors(NULL))
1407 ret = 2;
1408 else
1409 ret = 1;
1410 } else {
1411 /* No new error, intermittent problem. */
1412 ret = 0;
1413 }
1414
1415 /* Restore error enables. */
1416 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1417 "membar #Sync"
1418 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1419
1420 return ret;
1421 }
1422
1423 /* Return non-zero if PADDR is a valid physical memory address. */
1424 static int cheetah_check_main_memory(unsigned long paddr)
1425 {
1426 unsigned long vaddr = PAGE_OFFSET + paddr;
1427
1428 if (vaddr > (unsigned long) high_memory)
1429 return 0;
1430
1431 return kern_addr_valid(vaddr);
1432 }
1433
1434 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1435 {
1436 struct cheetah_err_info local_snapshot, *p;
1437 int recoverable, is_memory;
1438
1439 p = cheetah_get_error_log(afsr);
1440 if (!p) {
1441 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1442 afsr, afar);
1443 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1444 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1445 prom_halt();
1446 }
1447
1448 /* Grab snapshot of logged error. */
1449 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1450
1451 /* If the current trap snapshot does not match what the
1452 * trap handler passed along into our args, big trouble.
1453 * In such a case, mark the local copy as invalid.
1454 *
1455 * Else, it matches and we mark the afsr in the non-local
1456 * copy as invalid so we may log new error traps there.
1457 */
1458 if (p->afsr != afsr || p->afar != afar)
1459 local_snapshot.afsr = CHAFSR_INVALID;
1460 else
1461 p->afsr = CHAFSR_INVALID;
1462
1463 is_memory = cheetah_check_main_memory(afar);
1464
1465 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1466 /* XXX Might want to log the results of this operation
1467 * XXX somewhere... -DaveM
1468 */
1469 cheetah_fix_ce(afar);
1470 }
1471
1472 {
1473 int flush_all, flush_line;
1474
1475 flush_all = flush_line = 0;
1476 if ((afsr & CHAFSR_EDC) != 0UL) {
1477 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1478 flush_line = 1;
1479 else
1480 flush_all = 1;
1481 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1482 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1483 flush_line = 1;
1484 else
1485 flush_all = 1;
1486 }
1487
1488 /* Trap handler only disabled I-cache, flush it. */
1489 cheetah_flush_icache();
1490
1491 /* Re-enable I-cache */
1492 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1493 "or %%g1, %1, %%g1\n\t"
1494 "stxa %%g1, [%%g0] %0\n\t"
1495 "membar #Sync"
1496 : /* no outputs */
1497 : "i" (ASI_DCU_CONTROL_REG),
1498 "i" (DCU_IC)
1499 : "g1");
1500
1501 if (flush_all)
1502 cheetah_flush_ecache();
1503 else if (flush_line)
1504 cheetah_flush_ecache_line(afar);
1505 }
1506
1507 /* Re-enable error reporting */
1508 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1509 "or %%g1, %1, %%g1\n\t"
1510 "stxa %%g1, [%%g0] %0\n\t"
1511 "membar #Sync"
1512 : /* no outputs */
1513 : "i" (ASI_ESTATE_ERROR_EN),
1514 "i" (ESTATE_ERROR_CEEN)
1515 : "g1");
1516
1517 /* Decide if we can continue after handling this trap and
1518 * logging the error.
1519 */
1520 recoverable = 1;
1521 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1522 recoverable = 0;
1523
1524 /* Re-check AFSR/AFAR */
1525 (void) cheetah_recheck_errors(&local_snapshot);
1526
1527 /* Log errors. */
1528 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1529
1530 if (!recoverable)
1531 panic("Irrecoverable Correctable-ECC error trap.\n");
1532 }
1533
1534 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1535 {
1536 struct cheetah_err_info local_snapshot, *p;
1537 int recoverable, is_memory;
1538
1539 #ifdef CONFIG_PCI
1540 /* Check for the special PCI poke sequence. */
1541 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1542 cheetah_flush_icache();
1543 cheetah_flush_dcache();
1544
1545 /* Re-enable I-cache/D-cache */
1546 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1547 "or %%g1, %1, %%g1\n\t"
1548 "stxa %%g1, [%%g0] %0\n\t"
1549 "membar #Sync"
1550 : /* no outputs */
1551 : "i" (ASI_DCU_CONTROL_REG),
1552 "i" (DCU_DC | DCU_IC)
1553 : "g1");
1554
1555 /* Re-enable error reporting */
1556 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1557 "or %%g1, %1, %%g1\n\t"
1558 "stxa %%g1, [%%g0] %0\n\t"
1559 "membar #Sync"
1560 : /* no outputs */
1561 : "i" (ASI_ESTATE_ERROR_EN),
1562 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1563 : "g1");
1564
1565 (void) cheetah_recheck_errors(NULL);
1566
1567 pci_poke_faulted = 1;
1568 regs->tpc += 4;
1569 regs->tnpc = regs->tpc + 4;
1570 return;
1571 }
1572 #endif
1573
1574 p = cheetah_get_error_log(afsr);
1575 if (!p) {
1576 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1577 afsr, afar);
1578 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1579 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1580 prom_halt();
1581 }
1582
1583 /* Grab snapshot of logged error. */
1584 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1585
1586 /* If the current trap snapshot does not match what the
1587 * trap handler passed along into our args, big trouble.
1588 * In such a case, mark the local copy as invalid.
1589 *
1590 * Else, it matches and we mark the afsr in the non-local
1591 * copy as invalid so we may log new error traps there.
1592 */
1593 if (p->afsr != afsr || p->afar != afar)
1594 local_snapshot.afsr = CHAFSR_INVALID;
1595 else
1596 p->afsr = CHAFSR_INVALID;
1597
1598 is_memory = cheetah_check_main_memory(afar);
1599
1600 {
1601 int flush_all, flush_line;
1602
1603 flush_all = flush_line = 0;
1604 if ((afsr & CHAFSR_EDU) != 0UL) {
1605 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1606 flush_line = 1;
1607 else
1608 flush_all = 1;
1609 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1610 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1611 flush_line = 1;
1612 else
1613 flush_all = 1;
1614 }
1615
1616 cheetah_flush_icache();
1617 cheetah_flush_dcache();
1618
1619 /* Re-enable I/D caches */
1620 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1621 "or %%g1, %1, %%g1\n\t"
1622 "stxa %%g1, [%%g0] %0\n\t"
1623 "membar #Sync"
1624 : /* no outputs */
1625 : "i" (ASI_DCU_CONTROL_REG),
1626 "i" (DCU_IC | DCU_DC)
1627 : "g1");
1628
1629 if (flush_all)
1630 cheetah_flush_ecache();
1631 else if (flush_line)
1632 cheetah_flush_ecache_line(afar);
1633 }
1634
1635 /* Re-enable error reporting */
1636 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1637 "or %%g1, %1, %%g1\n\t"
1638 "stxa %%g1, [%%g0] %0\n\t"
1639 "membar #Sync"
1640 : /* no outputs */
1641 : "i" (ASI_ESTATE_ERROR_EN),
1642 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1643 : "g1");
1644
1645 /* Decide if we can continue after handling this trap and
1646 * logging the error.
1647 */
1648 recoverable = 1;
1649 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1650 recoverable = 0;
1651
1652 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1653 * error was logged while we had error reporting traps disabled.
1654 */
1655 if (cheetah_recheck_errors(&local_snapshot)) {
1656 unsigned long new_afsr = local_snapshot.afsr;
1657
1658 /* If we got a new asynchronous error, die... */
1659 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1660 CHAFSR_WDU | CHAFSR_CPU |
1661 CHAFSR_IVU | CHAFSR_UE |
1662 CHAFSR_BERR | CHAFSR_TO))
1663 recoverable = 0;
1664 }
1665
1666 /* Log errors. */
1667 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1668
1669 /* "Recoverable" here means we try to yank the page from ever
1670 * being newly used again. This depends upon a few things:
1671 * 1) Must be main memory, and AFAR must be valid.
1672 * 2) If we trapped from user, OK.
1673 * 3) Else, if we trapped from kernel we must find exception
1674 * table entry (ie. we have to have been accessing user
1675 * space).
1676 *
1677 * If AFAR is not in main memory, or we trapped from kernel
1678 * and cannot find an exception table entry, it is unacceptable
1679 * to try and continue.
1680 */
1681 if (recoverable && is_memory) {
1682 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1683 /* OK, usermode access. */
1684 recoverable = 1;
1685 } else {
1686 const struct exception_table_entry *entry;
1687
1688 entry = search_exception_tables(regs->tpc);
1689 if (entry) {
1690 /* OK, kernel access to userspace. */
1691 recoverable = 1;
1692
1693 } else {
1694 /* BAD, privileged state is corrupted. */
1695 recoverable = 0;
1696 }
1697
1698 if (recoverable) {
1699 if (pfn_valid(afar >> PAGE_SHIFT))
1700 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1701 else
1702 recoverable = 0;
1703
1704 /* Only perform fixup if we still have a
1705 * recoverable condition.
1706 */
1707 if (recoverable) {
1708 regs->tpc = entry->fixup;
1709 regs->tnpc = regs->tpc + 4;
1710 }
1711 }
1712 }
1713 } else {
1714 recoverable = 0;
1715 }
1716
1717 if (!recoverable)
1718 panic("Irrecoverable deferred error trap.\n");
1719 }
1720
1721 /* Handle a D/I cache parity error trap. TYPE is encoded as:
1722 *
1723 * Bit0: 0=dcache,1=icache
1724 * Bit1: 0=recoverable,1=unrecoverable
1725 *
1726 * The hardware has disabled both the I-cache and D-cache in
1727 * the %dcr register.
1728 */
1729 void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1730 {
1731 if (type & 0x1)
1732 __cheetah_flush_icache();
1733 else
1734 cheetah_plus_zap_dcache_parity();
1735 cheetah_flush_dcache();
1736
1737 /* Re-enable I-cache/D-cache */
1738 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1739 "or %%g1, %1, %%g1\n\t"
1740 "stxa %%g1, [%%g0] %0\n\t"
1741 "membar #Sync"
1742 : /* no outputs */
1743 : "i" (ASI_DCU_CONTROL_REG),
1744 "i" (DCU_DC | DCU_IC)
1745 : "g1");
1746
1747 if (type & 0x2) {
1748 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1749 smp_processor_id(),
1750 (type & 0x1) ? 'I' : 'D',
1751 regs->tpc);
1752 printk(KERN_EMERG "TPC<%pS>\n", (void *) regs->tpc);
1753 panic("Irrecoverable Cheetah+ parity error.");
1754 }
1755
1756 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1757 smp_processor_id(),
1758 (type & 0x1) ? 'I' : 'D',
1759 regs->tpc);
1760 printk(KERN_WARNING "TPC<%pS>\n", (void *) regs->tpc);
1761 }
1762
1763 struct sun4v_error_entry {
1764 /* Unique error handle */
1765 /*0x00*/u64 err_handle;
1766
1767 /* %stick value at the time of the error */
1768 /*0x08*/u64 err_stick;
1769
1770 /*0x10*/u8 reserved_1[3];
1771
1772 /* Error type */
1773 /*0x13*/u8 err_type;
1774 #define SUN4V_ERR_TYPE_UNDEFINED 0
1775 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1776 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1777 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1778 #define SUN4V_ERR_TYPE_SHUTDOWN_RQST 4
1779 #define SUN4V_ERR_TYPE_DUMP_CORE 5
1780 #define SUN4V_ERR_TYPE_SP_STATE_CHANGE 6
1781 #define SUN4V_ERR_TYPE_NUM 7
1782
1783 /* Error attributes */
1784 /*0x14*/u32 err_attrs;
1785 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1786 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1787 #define SUN4V_ERR_ATTRS_PIO 0x00000004
1788 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1789 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1790 #define SUN4V_ERR_ATTRS_SHUTDOWN_RQST 0x00000020
1791 #define SUN4V_ERR_ATTRS_ASR 0x00000040
1792 #define SUN4V_ERR_ATTRS_ASI 0x00000080
1793 #define SUN4V_ERR_ATTRS_PRIV_REG 0x00000100
1794 #define SUN4V_ERR_ATTRS_SPSTATE_MSK 0x00000600
1795 #define SUN4V_ERR_ATTRS_SPSTATE_SHFT 9
1796 #define SUN4V_ERR_ATTRS_MODE_MSK 0x03000000
1797 #define SUN4V_ERR_ATTRS_MODE_SHFT 24
1798 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1799
1800 #define SUN4V_ERR_SPSTATE_FAULTED 0
1801 #define SUN4V_ERR_SPSTATE_AVAILABLE 1
1802 #define SUN4V_ERR_SPSTATE_NOT_PRESENT 2
1803
1804 #define SUN4V_ERR_MODE_USER 1
1805 #define SUN4V_ERR_MODE_PRIV 2
1806
1807 /* Real address of the memory region or PIO transaction */
1808 /*0x18*/u64 err_raddr;
1809
1810 /* Size of the operation triggering the error, in bytes */
1811 /*0x20*/u32 err_size;
1812
1813 /* ID of the CPU */
1814 /*0x24*/u16 err_cpu;
1815
1816 /* Grace periof for shutdown, in seconds */
1817 /*0x26*/u16 err_secs;
1818
1819 /* Value of the %asi register */
1820 /*0x28*/u8 err_asi;
1821
1822 /*0x29*/u8 reserved_2;
1823
1824 /* Value of the ASR register number */
1825 /*0x2a*/u16 err_asr;
1826 #define SUN4V_ERR_ASR_VALID 0x8000
1827
1828 /*0x2c*/u32 reserved_3;
1829 /*0x30*/u64 reserved_4;
1830 /*0x38*/u64 reserved_5;
1831 };
1832
1833 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1834 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1835
1836 static const char *sun4v_err_type_to_str(u8 type)
1837 {
1838 static const char *types[SUN4V_ERR_TYPE_NUM] = {
1839 "undefined",
1840 "uncorrected resumable",
1841 "precise nonresumable",
1842 "deferred nonresumable",
1843 "shutdown request",
1844 "dump core",
1845 "SP state change",
1846 };
1847
1848 if (type < SUN4V_ERR_TYPE_NUM)
1849 return types[type];
1850
1851 return "unknown";
1852 }
1853
1854 static void sun4v_emit_err_attr_strings(u32 attrs)
1855 {
1856 static const char *attr_names[] = {
1857 "processor",
1858 "memory",
1859 "PIO",
1860 "int-registers",
1861 "fpu-registers",
1862 "shutdown-request",
1863 "ASR",
1864 "ASI",
1865 "priv-reg",
1866 };
1867 static const char *sp_states[] = {
1868 "sp-faulted",
1869 "sp-available",
1870 "sp-not-present",
1871 "sp-state-reserved",
1872 };
1873 static const char *modes[] = {
1874 "mode-reserved0",
1875 "user",
1876 "priv",
1877 "mode-reserved1",
1878 };
1879 u32 sp_state, mode;
1880 int i;
1881
1882 for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
1883 if (attrs & (1U << i)) {
1884 const char *s = attr_names[i];
1885
1886 pr_cont("%s ", s);
1887 }
1888 }
1889
1890 sp_state = ((attrs & SUN4V_ERR_ATTRS_SPSTATE_MSK) >>
1891 SUN4V_ERR_ATTRS_SPSTATE_SHFT);
1892 pr_cont("%s ", sp_states[sp_state]);
1893
1894 mode = ((attrs & SUN4V_ERR_ATTRS_MODE_MSK) >>
1895 SUN4V_ERR_ATTRS_MODE_SHFT);
1896 pr_cont("%s ", modes[mode]);
1897
1898 if (attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL)
1899 pr_cont("res-queue-full ");
1900 }
1901
1902 /* When the report contains a real-address of "-1" it means that the
1903 * hardware did not provide the address. So we compute the effective
1904 * address of the load or store instruction at regs->tpc and report
1905 * that. Usually when this happens it's a PIO and in such a case we
1906 * are using physical addresses with bypass ASIs anyways, so what we
1907 * report here is exactly what we want.
1908 */
1909 static void sun4v_report_real_raddr(const char *pfx, struct pt_regs *regs)
1910 {
1911 unsigned int insn;
1912 u64 addr;
1913
1914 if (!(regs->tstate & TSTATE_PRIV))
1915 return;
1916
1917 insn = *(unsigned int *) regs->tpc;
1918
1919 addr = compute_effective_address(regs, insn, 0);
1920
1921 printk("%s: insn effective address [0x%016llx]\n",
1922 pfx, addr);
1923 }
1924
1925 static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent,
1926 int cpu, const char *pfx, atomic_t *ocnt)
1927 {
1928 u64 *raw_ptr = (u64 *) ent;
1929 u32 attrs;
1930 int cnt;
1931
1932 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1933 printk("%s: TPC [0x%016lx] <%pS>\n",
1934 pfx, regs->tpc, (void *) regs->tpc);
1935
1936 printk("%s: RAW [%016llx:%016llx:%016llx:%016llx\n",
1937 pfx, raw_ptr[0], raw_ptr[1], raw_ptr[2], raw_ptr[3]);
1938 printk("%s: %016llx:%016llx:%016llx:%016llx]\n",
1939 pfx, raw_ptr[4], raw_ptr[5], raw_ptr[6], raw_ptr[7]);
1940
1941 printk("%s: handle [0x%016llx] stick [0x%016llx]\n",
1942 pfx, ent->err_handle, ent->err_stick);
1943
1944 printk("%s: type [%s]\n", pfx, sun4v_err_type_to_str(ent->err_type));
1945
1946 attrs = ent->err_attrs;
1947 printk("%s: attrs [0x%08x] < ", pfx, attrs);
1948 sun4v_emit_err_attr_strings(attrs);
1949 pr_cont(">\n");
1950
1951 /* Various fields in the error report are only valid if
1952 * certain attribute bits are set.
1953 */
1954 if (attrs & (SUN4V_ERR_ATTRS_MEMORY |
1955 SUN4V_ERR_ATTRS_PIO |
1956 SUN4V_ERR_ATTRS_ASI)) {
1957 printk("%s: raddr [0x%016llx]\n", pfx, ent->err_raddr);
1958
1959 if (ent->err_raddr == ~(u64)0)
1960 sun4v_report_real_raddr(pfx, regs);
1961 }
1962
1963 if (attrs & (SUN4V_ERR_ATTRS_MEMORY | SUN4V_ERR_ATTRS_ASI))
1964 printk("%s: size [0x%x]\n", pfx, ent->err_size);
1965
1966 if (attrs & (SUN4V_ERR_ATTRS_PROCESSOR |
1967 SUN4V_ERR_ATTRS_INT_REGISTERS |
1968 SUN4V_ERR_ATTRS_FPU_REGISTERS |
1969 SUN4V_ERR_ATTRS_PRIV_REG))
1970 printk("%s: cpu[%u]\n", pfx, ent->err_cpu);
1971
1972 if (attrs & SUN4V_ERR_ATTRS_ASI)
1973 printk("%s: asi [0x%02x]\n", pfx, ent->err_asi);
1974
1975 if ((attrs & (SUN4V_ERR_ATTRS_INT_REGISTERS |
1976 SUN4V_ERR_ATTRS_FPU_REGISTERS |
1977 SUN4V_ERR_ATTRS_PRIV_REG)) &&
1978 (ent->err_asr & SUN4V_ERR_ASR_VALID) != 0)
1979 printk("%s: reg [0x%04x]\n",
1980 pfx, ent->err_asr & ~SUN4V_ERR_ASR_VALID);
1981
1982 show_regs(regs);
1983
1984 if ((cnt = atomic_read(ocnt)) != 0) {
1985 atomic_set(ocnt, 0);
1986 wmb();
1987 printk("%s: Queue overflowed %d times.\n",
1988 pfx, cnt);
1989 }
1990 }
1991
1992 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
1993 * Log the event and clear the first word of the entry.
1994 */
1995 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
1996 {
1997 struct sun4v_error_entry *ent, local_copy;
1998 struct trap_per_cpu *tb;
1999 unsigned long paddr;
2000 int cpu;
2001
2002 cpu = get_cpu();
2003
2004 tb = &trap_block[cpu];
2005 paddr = tb->resum_kernel_buf_pa + offset;
2006 ent = __va(paddr);
2007
2008 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
2009
2010 /* We have a local copy now, so release the entry. */
2011 ent->err_handle = 0;
2012 wmb();
2013
2014 put_cpu();
2015
2016 if (local_copy.err_type == SUN4V_ERR_TYPE_SHUTDOWN_RQST) {
2017 /* We should really take the seconds field of
2018 * the error report and use it for the shutdown
2019 * invocation, but for now do the same thing we
2020 * do for a DS shutdown request.
2021 */
2022 pr_info("Shutdown request, %u seconds...\n",
2023 local_copy.err_secs);
2024 orderly_poweroff(true);
2025 return;
2026 }
2027
2028 sun4v_log_error(regs, &local_copy, cpu,
2029 KERN_ERR "RESUMABLE ERROR",
2030 &sun4v_resum_oflow_cnt);
2031 }
2032
2033 /* If we try to printk() we'll probably make matters worse, by trying
2034 * to retake locks this cpu already holds or causing more errors. So
2035 * just bump a counter, and we'll report these counter bumps above.
2036 */
2037 void sun4v_resum_overflow(struct pt_regs *regs)
2038 {
2039 atomic_inc(&sun4v_resum_oflow_cnt);
2040 }
2041
2042 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
2043 * Log the event, clear the first word of the entry, and die.
2044 */
2045 void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
2046 {
2047 struct sun4v_error_entry *ent, local_copy;
2048 struct trap_per_cpu *tb;
2049 unsigned long paddr;
2050 int cpu;
2051
2052 cpu = get_cpu();
2053
2054 tb = &trap_block[cpu];
2055 paddr = tb->nonresum_kernel_buf_pa + offset;
2056 ent = __va(paddr);
2057
2058 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
2059
2060 /* We have a local copy now, so release the entry. */
2061 ent->err_handle = 0;
2062 wmb();
2063
2064 put_cpu();
2065
2066 #ifdef CONFIG_PCI
2067 /* Check for the special PCI poke sequence. */
2068 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
2069 pci_poke_faulted = 1;
2070 regs->tpc += 4;
2071 regs->tnpc = regs->tpc + 4;
2072 return;
2073 }
2074 #endif
2075
2076 sun4v_log_error(regs, &local_copy, cpu,
2077 KERN_EMERG "NON-RESUMABLE ERROR",
2078 &sun4v_nonresum_oflow_cnt);
2079
2080 panic("Non-resumable error.");
2081 }
2082
2083 /* If we try to printk() we'll probably make matters worse, by trying
2084 * to retake locks this cpu already holds or causing more errors. So
2085 * just bump a counter, and we'll report these counter bumps above.
2086 */
2087 void sun4v_nonresum_overflow(struct pt_regs *regs)
2088 {
2089 /* XXX Actually even this can make not that much sense. Perhaps
2090 * XXX we should just pull the plug and panic directly from here?
2091 */
2092 atomic_inc(&sun4v_nonresum_oflow_cnt);
2093 }
2094
2095 unsigned long sun4v_err_itlb_vaddr;
2096 unsigned long sun4v_err_itlb_ctx;
2097 unsigned long sun4v_err_itlb_pte;
2098 unsigned long sun4v_err_itlb_error;
2099
2100 void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
2101 {
2102 if (tl > 1)
2103 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2104
2105 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
2106 regs->tpc, tl);
2107 printk(KERN_EMERG "SUN4V-ITLB: TPC<%pS>\n", (void *) regs->tpc);
2108 printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
2109 printk(KERN_EMERG "SUN4V-ITLB: O7<%pS>\n",
2110 (void *) regs->u_regs[UREG_I7]);
2111 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
2112 "pte[%lx] error[%lx]\n",
2113 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
2114 sun4v_err_itlb_pte, sun4v_err_itlb_error);
2115
2116 prom_halt();
2117 }
2118
2119 unsigned long sun4v_err_dtlb_vaddr;
2120 unsigned long sun4v_err_dtlb_ctx;
2121 unsigned long sun4v_err_dtlb_pte;
2122 unsigned long sun4v_err_dtlb_error;
2123
2124 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
2125 {
2126 if (tl > 1)
2127 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2128
2129 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
2130 regs->tpc, tl);
2131 printk(KERN_EMERG "SUN4V-DTLB: TPC<%pS>\n", (void *) regs->tpc);
2132 printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
2133 printk(KERN_EMERG "SUN4V-DTLB: O7<%pS>\n",
2134 (void *) regs->u_regs[UREG_I7]);
2135 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
2136 "pte[%lx] error[%lx]\n",
2137 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
2138 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
2139
2140 prom_halt();
2141 }
2142
2143 void hypervisor_tlbop_error(unsigned long err, unsigned long op)
2144 {
2145 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
2146 err, op);
2147 }
2148
2149 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
2150 {
2151 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
2152 err, op);
2153 }
2154
2155 void do_fpe_common(struct pt_regs *regs)
2156 {
2157 if (regs->tstate & TSTATE_PRIV) {
2158 regs->tpc = regs->tnpc;
2159 regs->tnpc += 4;
2160 } else {
2161 unsigned long fsr = current_thread_info()->xfsr[0];
2162 siginfo_t info;
2163
2164 if (test_thread_flag(TIF_32BIT)) {
2165 regs->tpc &= 0xffffffff;
2166 regs->tnpc &= 0xffffffff;
2167 }
2168 info.si_signo = SIGFPE;
2169 info.si_errno = 0;
2170 info.si_addr = (void __user *)regs->tpc;
2171 info.si_trapno = 0;
2172 info.si_code = __SI_FAULT;
2173 if ((fsr & 0x1c000) == (1 << 14)) {
2174 if (fsr & 0x10)
2175 info.si_code = FPE_FLTINV;
2176 else if (fsr & 0x08)
2177 info.si_code = FPE_FLTOVF;
2178 else if (fsr & 0x04)
2179 info.si_code = FPE_FLTUND;
2180 else if (fsr & 0x02)
2181 info.si_code = FPE_FLTDIV;
2182 else if (fsr & 0x01)
2183 info.si_code = FPE_FLTRES;
2184 }
2185 force_sig_info(SIGFPE, &info, current);
2186 }
2187 }
2188
2189 void do_fpieee(struct pt_regs *regs)
2190 {
2191 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2192 0, 0x24, SIGFPE) == NOTIFY_STOP)
2193 return;
2194
2195 do_fpe_common(regs);
2196 }
2197
2198 extern int do_mathemu(struct pt_regs *, struct fpustate *, bool);
2199
2200 void do_fpother(struct pt_regs *regs)
2201 {
2202 struct fpustate *f = FPUSTATE;
2203 int ret = 0;
2204
2205 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2206 0, 0x25, SIGFPE) == NOTIFY_STOP)
2207 return;
2208
2209 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2210 case (2 << 14): /* unfinished_FPop */
2211 case (3 << 14): /* unimplemented_FPop */
2212 ret = do_mathemu(regs, f, false);
2213 break;
2214 }
2215 if (ret)
2216 return;
2217 do_fpe_common(regs);
2218 }
2219
2220 void do_tof(struct pt_regs *regs)
2221 {
2222 siginfo_t info;
2223
2224 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2225 0, 0x26, SIGEMT) == NOTIFY_STOP)
2226 return;
2227
2228 if (regs->tstate & TSTATE_PRIV)
2229 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2230 if (test_thread_flag(TIF_32BIT)) {
2231 regs->tpc &= 0xffffffff;
2232 regs->tnpc &= 0xffffffff;
2233 }
2234 info.si_signo = SIGEMT;
2235 info.si_errno = 0;
2236 info.si_code = EMT_TAGOVF;
2237 info.si_addr = (void __user *)regs->tpc;
2238 info.si_trapno = 0;
2239 force_sig_info(SIGEMT, &info, current);
2240 }
2241
2242 void do_div0(struct pt_regs *regs)
2243 {
2244 siginfo_t info;
2245
2246 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2247 0, 0x28, SIGFPE) == NOTIFY_STOP)
2248 return;
2249
2250 if (regs->tstate & TSTATE_PRIV)
2251 die_if_kernel("TL0: Kernel divide by zero.", regs);
2252 if (test_thread_flag(TIF_32BIT)) {
2253 regs->tpc &= 0xffffffff;
2254 regs->tnpc &= 0xffffffff;
2255 }
2256 info.si_signo = SIGFPE;
2257 info.si_errno = 0;
2258 info.si_code = FPE_INTDIV;
2259 info.si_addr = (void __user *)regs->tpc;
2260 info.si_trapno = 0;
2261 force_sig_info(SIGFPE, &info, current);
2262 }
2263
2264 static void instruction_dump(unsigned int *pc)
2265 {
2266 int i;
2267
2268 if ((((unsigned long) pc) & 3))
2269 return;
2270
2271 printk("Instruction DUMP:");
2272 for (i = -3; i < 6; i++)
2273 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2274 printk("\n");
2275 }
2276
2277 static void user_instruction_dump(unsigned int __user *pc)
2278 {
2279 int i;
2280 unsigned int buf[9];
2281
2282 if ((((unsigned long) pc) & 3))
2283 return;
2284
2285 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2286 return;
2287
2288 printk("Instruction DUMP:");
2289 for (i = 0; i < 9; i++)
2290 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2291 printk("\n");
2292 }
2293
2294 void show_stack(struct task_struct *tsk, unsigned long *_ksp)
2295 {
2296 unsigned long fp, ksp;
2297 struct thread_info *tp;
2298 int count = 0;
2299 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
2300 int graph = 0;
2301 #endif
2302
2303 ksp = (unsigned long) _ksp;
2304 if (!tsk)
2305 tsk = current;
2306 tp = task_thread_info(tsk);
2307 if (ksp == 0UL) {
2308 if (tsk == current)
2309 asm("mov %%fp, %0" : "=r" (ksp));
2310 else
2311 ksp = tp->ksp;
2312 }
2313 if (tp == current_thread_info())
2314 flushw_all();
2315
2316 fp = ksp + STACK_BIAS;
2317
2318 printk("Call Trace:\n");
2319 do {
2320 struct sparc_stackf *sf;
2321 struct pt_regs *regs;
2322 unsigned long pc;
2323
2324 if (!kstack_valid(tp, fp))
2325 break;
2326 sf = (struct sparc_stackf *) fp;
2327 regs = (struct pt_regs *) (sf + 1);
2328
2329 if (kstack_is_trap_frame(tp, regs)) {
2330 if (!(regs->tstate & TSTATE_PRIV))
2331 break;
2332 pc = regs->tpc;
2333 fp = regs->u_regs[UREG_I6] + STACK_BIAS;
2334 } else {
2335 pc = sf->callers_pc;
2336 fp = (unsigned long)sf->fp + STACK_BIAS;
2337 }
2338
2339 printk(" [%016lx] %pS\n", pc, (void *) pc);
2340 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
2341 if ((pc + 8UL) == (unsigned long) &return_to_handler) {
2342 int index = tsk->curr_ret_stack;
2343 if (tsk->ret_stack && index >= graph) {
2344 pc = tsk->ret_stack[index - graph].ret;
2345 printk(" [%016lx] %pS\n", pc, (void *) pc);
2346 graph++;
2347 }
2348 }
2349 #endif
2350 } while (++count < 16);
2351 }
2352
2353 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2354 {
2355 unsigned long fp = rw->ins[6];
2356
2357 if (!fp)
2358 return NULL;
2359
2360 return (struct reg_window *) (fp + STACK_BIAS);
2361 }
2362
2363 void die_if_kernel(char *str, struct pt_regs *regs)
2364 {
2365 static int die_counter;
2366 int count = 0;
2367
2368 /* Amuse the user. */
2369 printk(
2370 " \\|/ ____ \\|/\n"
2371 " \"@'/ .. \\`@\"\n"
2372 " /_| \\__/ |_\\\n"
2373 " \\__U_/\n");
2374
2375 printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
2376 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2377 __asm__ __volatile__("flushw");
2378 show_regs(regs);
2379 add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
2380 if (regs->tstate & TSTATE_PRIV) {
2381 struct thread_info *tp = current_thread_info();
2382 struct reg_window *rw = (struct reg_window *)
2383 (regs->u_regs[UREG_FP] + STACK_BIAS);
2384
2385 /* Stop the back trace when we hit userland or we
2386 * find some badly aligned kernel stack.
2387 */
2388 while (rw &&
2389 count++ < 30 &&
2390 kstack_valid(tp, (unsigned long) rw)) {
2391 printk("Caller[%016lx]: %pS\n", rw->ins[7],
2392 (void *) rw->ins[7]);
2393
2394 rw = kernel_stack_up(rw);
2395 }
2396 instruction_dump ((unsigned int *) regs->tpc);
2397 } else {
2398 if (test_thread_flag(TIF_32BIT)) {
2399 regs->tpc &= 0xffffffff;
2400 regs->tnpc &= 0xffffffff;
2401 }
2402 user_instruction_dump ((unsigned int __user *) regs->tpc);
2403 }
2404 if (regs->tstate & TSTATE_PRIV)
2405 do_exit(SIGKILL);
2406 do_exit(SIGSEGV);
2407 }
2408 EXPORT_SYMBOL(die_if_kernel);
2409
2410 #define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2411 #define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2412
2413 extern int handle_popc(u32 insn, struct pt_regs *regs);
2414 extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
2415
2416 void do_illegal_instruction(struct pt_regs *regs)
2417 {
2418 unsigned long pc = regs->tpc;
2419 unsigned long tstate = regs->tstate;
2420 u32 insn;
2421 siginfo_t info;
2422
2423 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2424 0, 0x10, SIGILL) == NOTIFY_STOP)
2425 return;
2426
2427 if (tstate & TSTATE_PRIV)
2428 die_if_kernel("Kernel illegal instruction", regs);
2429 if (test_thread_flag(TIF_32BIT))
2430 pc = (u32)pc;
2431 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2432 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2433 if (handle_popc(insn, regs))
2434 return;
2435 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2436 if (handle_ldf_stq(insn, regs))
2437 return;
2438 } else if (tlb_type == hypervisor) {
2439 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2440 if (!vis_emul(regs, insn))
2441 return;
2442 } else {
2443 struct fpustate *f = FPUSTATE;
2444
2445 /* On UltraSPARC T2 and later, FPU insns which
2446 * are not implemented in HW signal an illegal
2447 * instruction trap and do not set the FP Trap
2448 * Trap in the %fsr to unimplemented_FPop.
2449 */
2450 if (do_mathemu(regs, f, true))
2451 return;
2452 }
2453 }
2454 }
2455 info.si_signo = SIGILL;
2456 info.si_errno = 0;
2457 info.si_code = ILL_ILLOPC;
2458 info.si_addr = (void __user *)pc;
2459 info.si_trapno = 0;
2460 force_sig_info(SIGILL, &info, current);
2461 }
2462
2463 extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
2464
2465 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2466 {
2467 siginfo_t info;
2468
2469 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2470 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2471 return;
2472
2473 if (regs->tstate & TSTATE_PRIV) {
2474 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2475 return;
2476 }
2477 info.si_signo = SIGBUS;
2478 info.si_errno = 0;
2479 info.si_code = BUS_ADRALN;
2480 info.si_addr = (void __user *)sfar;
2481 info.si_trapno = 0;
2482 force_sig_info(SIGBUS, &info, current);
2483 }
2484
2485 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2486 {
2487 siginfo_t info;
2488
2489 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2490 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2491 return;
2492
2493 if (regs->tstate & TSTATE_PRIV) {
2494 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2495 return;
2496 }
2497 info.si_signo = SIGBUS;
2498 info.si_errno = 0;
2499 info.si_code = BUS_ADRALN;
2500 info.si_addr = (void __user *) addr;
2501 info.si_trapno = 0;
2502 force_sig_info(SIGBUS, &info, current);
2503 }
2504
2505 void do_privop(struct pt_regs *regs)
2506 {
2507 siginfo_t info;
2508
2509 if (notify_die(DIE_TRAP, "privileged operation", regs,
2510 0, 0x11, SIGILL) == NOTIFY_STOP)
2511 return;
2512
2513 if (test_thread_flag(TIF_32BIT)) {
2514 regs->tpc &= 0xffffffff;
2515 regs->tnpc &= 0xffffffff;
2516 }
2517 info.si_signo = SIGILL;
2518 info.si_errno = 0;
2519 info.si_code = ILL_PRVOPC;
2520 info.si_addr = (void __user *)regs->tpc;
2521 info.si_trapno = 0;
2522 force_sig_info(SIGILL, &info, current);
2523 }
2524
2525 void do_privact(struct pt_regs *regs)
2526 {
2527 do_privop(regs);
2528 }
2529
2530 /* Trap level 1 stuff or other traps we should never see... */
2531 void do_cee(struct pt_regs *regs)
2532 {
2533 die_if_kernel("TL0: Cache Error Exception", regs);
2534 }
2535
2536 void do_cee_tl1(struct pt_regs *regs)
2537 {
2538 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2539 die_if_kernel("TL1: Cache Error Exception", regs);
2540 }
2541
2542 void do_dae_tl1(struct pt_regs *regs)
2543 {
2544 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2545 die_if_kernel("TL1: Data Access Exception", regs);
2546 }
2547
2548 void do_iae_tl1(struct pt_regs *regs)
2549 {
2550 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2551 die_if_kernel("TL1: Instruction Access Exception", regs);
2552 }
2553
2554 void do_div0_tl1(struct pt_regs *regs)
2555 {
2556 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2557 die_if_kernel("TL1: DIV0 Exception", regs);
2558 }
2559
2560 void do_fpdis_tl1(struct pt_regs *regs)
2561 {
2562 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2563 die_if_kernel("TL1: FPU Disabled", regs);
2564 }
2565
2566 void do_fpieee_tl1(struct pt_regs *regs)
2567 {
2568 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2569 die_if_kernel("TL1: FPU IEEE Exception", regs);
2570 }
2571
2572 void do_fpother_tl1(struct pt_regs *regs)
2573 {
2574 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2575 die_if_kernel("TL1: FPU Other Exception", regs);
2576 }
2577
2578 void do_ill_tl1(struct pt_regs *regs)
2579 {
2580 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2581 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2582 }
2583
2584 void do_irq_tl1(struct pt_regs *regs)
2585 {
2586 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2587 die_if_kernel("TL1: IRQ Exception", regs);
2588 }
2589
2590 void do_lddfmna_tl1(struct pt_regs *regs)
2591 {
2592 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2593 die_if_kernel("TL1: LDDF Exception", regs);
2594 }
2595
2596 void do_stdfmna_tl1(struct pt_regs *regs)
2597 {
2598 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2599 die_if_kernel("TL1: STDF Exception", regs);
2600 }
2601
2602 void do_paw(struct pt_regs *regs)
2603 {
2604 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2605 }
2606
2607 void do_paw_tl1(struct pt_regs *regs)
2608 {
2609 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2610 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2611 }
2612
2613 void do_vaw(struct pt_regs *regs)
2614 {
2615 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2616 }
2617
2618 void do_vaw_tl1(struct pt_regs *regs)
2619 {
2620 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2621 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2622 }
2623
2624 void do_tof_tl1(struct pt_regs *regs)
2625 {
2626 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2627 die_if_kernel("TL1: Tag Overflow Exception", regs);
2628 }
2629
2630 void do_getpsr(struct pt_regs *regs)
2631 {
2632 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2633 regs->tpc = regs->tnpc;
2634 regs->tnpc += 4;
2635 if (test_thread_flag(TIF_32BIT)) {
2636 regs->tpc &= 0xffffffff;
2637 regs->tnpc &= 0xffffffff;
2638 }
2639 }
2640
2641 struct trap_per_cpu trap_block[NR_CPUS];
2642 EXPORT_SYMBOL(trap_block);
2643
2644 /* This can get invoked before sched_init() so play it super safe
2645 * and use hard_smp_processor_id().
2646 */
2647 void notrace init_cur_cpu_trap(struct thread_info *t)
2648 {
2649 int cpu = hard_smp_processor_id();
2650 struct trap_per_cpu *p = &trap_block[cpu];
2651
2652 p->thread = t;
2653 p->pgd_paddr = 0;
2654 }
2655
2656 extern void thread_info_offsets_are_bolixed_dave(void);
2657 extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2658 extern void tsb_config_offsets_are_bolixed_dave(void);
2659
2660 /* Only invoked on boot processor. */
2661 void __init trap_init(void)
2662 {
2663 /* Compile time sanity check. */
2664 BUILD_BUG_ON(TI_TASK != offsetof(struct thread_info, task) ||
2665 TI_FLAGS != offsetof(struct thread_info, flags) ||
2666 TI_CPU != offsetof(struct thread_info, cpu) ||
2667 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2668 TI_KSP != offsetof(struct thread_info, ksp) ||
2669 TI_FAULT_ADDR != offsetof(struct thread_info,
2670 fault_address) ||
2671 TI_KREGS != offsetof(struct thread_info, kregs) ||
2672 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2673 TI_EXEC_DOMAIN != offsetof(struct thread_info,
2674 exec_domain) ||
2675 TI_REG_WINDOW != offsetof(struct thread_info,
2676 reg_window) ||
2677 TI_RWIN_SPTRS != offsetof(struct thread_info,
2678 rwbuf_stkptrs) ||
2679 TI_GSR != offsetof(struct thread_info, gsr) ||
2680 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2681 TI_PRE_COUNT != offsetof(struct thread_info,
2682 preempt_count) ||
2683 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2684 TI_CURRENT_DS != offsetof(struct thread_info,
2685 current_ds) ||
2686 TI_RESTART_BLOCK != offsetof(struct thread_info,
2687 restart_block) ||
2688 TI_KUNA_REGS != offsetof(struct thread_info,
2689 kern_una_regs) ||
2690 TI_KUNA_INSN != offsetof(struct thread_info,
2691 kern_una_insn) ||
2692 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2693 (TI_FPREGS & (64 - 1)));
2694
2695 BUILD_BUG_ON(TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu,
2696 thread) ||
2697 (TRAP_PER_CPU_PGD_PADDR !=
2698 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2699 (TRAP_PER_CPU_CPU_MONDO_PA !=
2700 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2701 (TRAP_PER_CPU_DEV_MONDO_PA !=
2702 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2703 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2704 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2705 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2706 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2707 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2708 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2709 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2710 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2711 (TRAP_PER_CPU_FAULT_INFO !=
2712 offsetof(struct trap_per_cpu, fault_info)) ||
2713 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2714 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2715 (TRAP_PER_CPU_CPU_LIST_PA !=
2716 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2717 (TRAP_PER_CPU_TSB_HUGE !=
2718 offsetof(struct trap_per_cpu, tsb_huge)) ||
2719 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2720 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2721 (TRAP_PER_CPU_IRQ_WORKLIST_PA !=
2722 offsetof(struct trap_per_cpu, irq_worklist_pa)) ||
2723 (TRAP_PER_CPU_CPU_MONDO_QMASK !=
2724 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) ||
2725 (TRAP_PER_CPU_DEV_MONDO_QMASK !=
2726 offsetof(struct trap_per_cpu, dev_mondo_qmask)) ||
2727 (TRAP_PER_CPU_RESUM_QMASK !=
2728 offsetof(struct trap_per_cpu, resum_qmask)) ||
2729 (TRAP_PER_CPU_NONRESUM_QMASK !=
2730 offsetof(struct trap_per_cpu, nonresum_qmask)) ||
2731 (TRAP_PER_CPU_PER_CPU_BASE !=
2732 offsetof(struct trap_per_cpu, __per_cpu_base)));
2733
2734 BUILD_BUG_ON((TSB_CONFIG_TSB !=
2735 offsetof(struct tsb_config, tsb)) ||
2736 (TSB_CONFIG_RSS_LIMIT !=
2737 offsetof(struct tsb_config, tsb_rss_limit)) ||
2738 (TSB_CONFIG_NENTRIES !=
2739 offsetof(struct tsb_config, tsb_nentries)) ||
2740 (TSB_CONFIG_REG_VAL !=
2741 offsetof(struct tsb_config, tsb_reg_val)) ||
2742 (TSB_CONFIG_MAP_VADDR !=
2743 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2744 (TSB_CONFIG_MAP_PTE !=
2745 offsetof(struct tsb_config, tsb_map_pte)));
2746
2747 /* Attach to the address space of init_task. On SMP we
2748 * do this in smp.c:smp_callin for other cpus.
2749 */
2750 atomic_inc(&init_mm.mm_count);
2751 current->active_mm = &init_mm;
2752 }
kernel source for telekom puls (alcatel/mediatek)