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sparc64: prepare module_64.c for unification
[deliverable/linux.git] / arch / sparc / kernel / traps_64.c
1 /* arch/sparc64/kernel/traps.c
2 *
3 * Copyright (C) 1995,1997,2008 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
21 #include <asm/smp.h>
22 #include <asm/delay.h>
23 #include <asm/system.h>
24 #include <asm/ptrace.h>
25 #include <asm/oplib.h>
26 #include <asm/page.h>
27 #include <asm/pgtable.h>
28 #include <asm/unistd.h>
29 #include <asm/uaccess.h>
30 #include <asm/fpumacro.h>
31 #include <asm/lsu.h>
32 #include <asm/dcu.h>
33 #include <asm/estate.h>
34 #include <asm/chafsr.h>
35 #include <asm/sfafsr.h>
36 #include <asm/psrcompat.h>
37 #include <asm/processor.h>
38 #include <asm/timer.h>
39 #include <asm/head.h>
40 #include <asm/prom.h>
41 #include <asm/memctrl.h>
42
43 #include "entry.h"
44 #include "kstack.h"
45
46 /* When an irrecoverable trap occurs at tl > 0, the trap entry
47 * code logs the trap state registers at every level in the trap
48 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
49 * is as follows:
50 */
51 struct tl1_traplog {
52 struct {
53 unsigned long tstate;
54 unsigned long tpc;
55 unsigned long tnpc;
56 unsigned long tt;
57 } trapstack[4];
58 unsigned long tl;
59 };
60
61 static void dump_tl1_traplog(struct tl1_traplog *p)
62 {
63 int i, limit;
64
65 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
66 "dumping track stack.\n", p->tl);
67
68 limit = (tlb_type == hypervisor) ? 2 : 4;
69 for (i = 0; i < limit; i++) {
70 printk(KERN_EMERG
71 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
72 "TNPC[%016lx] TT[%lx]\n",
73 i + 1,
74 p->trapstack[i].tstate, p->trapstack[i].tpc,
75 p->trapstack[i].tnpc, p->trapstack[i].tt);
76 printk("TRAPLOG: TPC<%pS>\n", (void *) p->trapstack[i].tpc);
77 }
78 }
79
80 void bad_trap(struct pt_regs *regs, long lvl)
81 {
82 char buffer[32];
83 siginfo_t info;
84
85 if (notify_die(DIE_TRAP, "bad trap", regs,
86 0, lvl, SIGTRAP) == NOTIFY_STOP)
87 return;
88
89 if (lvl < 0x100) {
90 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
91 die_if_kernel(buffer, regs);
92 }
93
94 lvl -= 0x100;
95 if (regs->tstate & TSTATE_PRIV) {
96 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
97 die_if_kernel(buffer, regs);
98 }
99 if (test_thread_flag(TIF_32BIT)) {
100 regs->tpc &= 0xffffffff;
101 regs->tnpc &= 0xffffffff;
102 }
103 info.si_signo = SIGILL;
104 info.si_errno = 0;
105 info.si_code = ILL_ILLTRP;
106 info.si_addr = (void __user *)regs->tpc;
107 info.si_trapno = lvl;
108 force_sig_info(SIGILL, &info, current);
109 }
110
111 void bad_trap_tl1(struct pt_regs *regs, long lvl)
112 {
113 char buffer[32];
114
115 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
116 0, lvl, SIGTRAP) == NOTIFY_STOP)
117 return;
118
119 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
120
121 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
122 die_if_kernel (buffer, regs);
123 }
124
125 #ifdef CONFIG_DEBUG_BUGVERBOSE
126 void do_BUG(const char *file, int line)
127 {
128 bust_spinlocks(1);
129 printk("kernel BUG at %s:%d!\n", file, line);
130 }
131 #endif
132
133 static DEFINE_SPINLOCK(dimm_handler_lock);
134 static dimm_printer_t dimm_handler;
135
136 static int sprintf_dimm(int synd_code, unsigned long paddr, char *buf, int buflen)
137 {
138 unsigned long flags;
139 int ret = -ENODEV;
140
141 spin_lock_irqsave(&dimm_handler_lock, flags);
142 if (dimm_handler) {
143 ret = dimm_handler(synd_code, paddr, buf, buflen);
144 } else if (tlb_type == spitfire) {
145 if (prom_getunumber(synd_code, paddr, buf, buflen) == -1)
146 ret = -EINVAL;
147 else
148 ret = 0;
149 } else
150 ret = -ENODEV;
151 spin_unlock_irqrestore(&dimm_handler_lock, flags);
152
153 return ret;
154 }
155
156 int register_dimm_printer(dimm_printer_t func)
157 {
158 unsigned long flags;
159 int ret = 0;
160
161 spin_lock_irqsave(&dimm_handler_lock, flags);
162 if (!dimm_handler)
163 dimm_handler = func;
164 else
165 ret = -EEXIST;
166 spin_unlock_irqrestore(&dimm_handler_lock, flags);
167
168 return ret;
169 }
170 EXPORT_SYMBOL_GPL(register_dimm_printer);
171
172 void unregister_dimm_printer(dimm_printer_t func)
173 {
174 unsigned long flags;
175
176 spin_lock_irqsave(&dimm_handler_lock, flags);
177 if (dimm_handler == func)
178 dimm_handler = NULL;
179 spin_unlock_irqrestore(&dimm_handler_lock, flags);
180 }
181 EXPORT_SYMBOL_GPL(unregister_dimm_printer);
182
183 void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
184 {
185 siginfo_t info;
186
187 if (notify_die(DIE_TRAP, "instruction access exception", regs,
188 0, 0x8, SIGTRAP) == NOTIFY_STOP)
189 return;
190
191 if (regs->tstate & TSTATE_PRIV) {
192 printk("spitfire_insn_access_exception: SFSR[%016lx] "
193 "SFAR[%016lx], going.\n", sfsr, sfar);
194 die_if_kernel("Iax", regs);
195 }
196 if (test_thread_flag(TIF_32BIT)) {
197 regs->tpc &= 0xffffffff;
198 regs->tnpc &= 0xffffffff;
199 }
200 info.si_signo = SIGSEGV;
201 info.si_errno = 0;
202 info.si_code = SEGV_MAPERR;
203 info.si_addr = (void __user *)regs->tpc;
204 info.si_trapno = 0;
205 force_sig_info(SIGSEGV, &info, current);
206 }
207
208 void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
209 {
210 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
211 0, 0x8, SIGTRAP) == NOTIFY_STOP)
212 return;
213
214 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
215 spitfire_insn_access_exception(regs, sfsr, sfar);
216 }
217
218 void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
219 {
220 unsigned short type = (type_ctx >> 16);
221 unsigned short ctx = (type_ctx & 0xffff);
222 siginfo_t info;
223
224 if (notify_die(DIE_TRAP, "instruction access exception", regs,
225 0, 0x8, SIGTRAP) == NOTIFY_STOP)
226 return;
227
228 if (regs->tstate & TSTATE_PRIV) {
229 printk("sun4v_insn_access_exception: ADDR[%016lx] "
230 "CTX[%04x] TYPE[%04x], going.\n",
231 addr, ctx, type);
232 die_if_kernel("Iax", regs);
233 }
234
235 if (test_thread_flag(TIF_32BIT)) {
236 regs->tpc &= 0xffffffff;
237 regs->tnpc &= 0xffffffff;
238 }
239 info.si_signo = SIGSEGV;
240 info.si_errno = 0;
241 info.si_code = SEGV_MAPERR;
242 info.si_addr = (void __user *) addr;
243 info.si_trapno = 0;
244 force_sig_info(SIGSEGV, &info, current);
245 }
246
247 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
248 {
249 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
250 0, 0x8, SIGTRAP) == NOTIFY_STOP)
251 return;
252
253 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
254 sun4v_insn_access_exception(regs, addr, type_ctx);
255 }
256
257 void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
258 {
259 siginfo_t info;
260
261 if (notify_die(DIE_TRAP, "data access exception", regs,
262 0, 0x30, SIGTRAP) == NOTIFY_STOP)
263 return;
264
265 if (regs->tstate & TSTATE_PRIV) {
266 /* Test if this comes from uaccess places. */
267 const struct exception_table_entry *entry;
268
269 entry = search_exception_tables(regs->tpc);
270 if (entry) {
271 /* Ouch, somebody is trying VM hole tricks on us... */
272 #ifdef DEBUG_EXCEPTIONS
273 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
274 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
275 regs->tpc, entry->fixup);
276 #endif
277 regs->tpc = entry->fixup;
278 regs->tnpc = regs->tpc + 4;
279 return;
280 }
281 /* Shit... */
282 printk("spitfire_data_access_exception: SFSR[%016lx] "
283 "SFAR[%016lx], going.\n", sfsr, sfar);
284 die_if_kernel("Dax", regs);
285 }
286
287 info.si_signo = SIGSEGV;
288 info.si_errno = 0;
289 info.si_code = SEGV_MAPERR;
290 info.si_addr = (void __user *)sfar;
291 info.si_trapno = 0;
292 force_sig_info(SIGSEGV, &info, current);
293 }
294
295 void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
296 {
297 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
298 0, 0x30, SIGTRAP) == NOTIFY_STOP)
299 return;
300
301 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
302 spitfire_data_access_exception(regs, sfsr, sfar);
303 }
304
305 void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
306 {
307 unsigned short type = (type_ctx >> 16);
308 unsigned short ctx = (type_ctx & 0xffff);
309 siginfo_t info;
310
311 if (notify_die(DIE_TRAP, "data access exception", regs,
312 0, 0x8, SIGTRAP) == NOTIFY_STOP)
313 return;
314
315 if (regs->tstate & TSTATE_PRIV) {
316 printk("sun4v_data_access_exception: ADDR[%016lx] "
317 "CTX[%04x] TYPE[%04x], going.\n",
318 addr, ctx, type);
319 die_if_kernel("Dax", regs);
320 }
321
322 if (test_thread_flag(TIF_32BIT)) {
323 regs->tpc &= 0xffffffff;
324 regs->tnpc &= 0xffffffff;
325 }
326 info.si_signo = SIGSEGV;
327 info.si_errno = 0;
328 info.si_code = SEGV_MAPERR;
329 info.si_addr = (void __user *) addr;
330 info.si_trapno = 0;
331 force_sig_info(SIGSEGV, &info, current);
332 }
333
334 void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
335 {
336 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
337 0, 0x8, SIGTRAP) == NOTIFY_STOP)
338 return;
339
340 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
341 sun4v_data_access_exception(regs, addr, type_ctx);
342 }
343
344 #ifdef CONFIG_PCI
345 #include "pci_impl.h"
346 #endif
347
348 /* When access exceptions happen, we must do this. */
349 static void spitfire_clean_and_reenable_l1_caches(void)
350 {
351 unsigned long va;
352
353 if (tlb_type != spitfire)
354 BUG();
355
356 /* Clean 'em. */
357 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
358 spitfire_put_icache_tag(va, 0x0);
359 spitfire_put_dcache_tag(va, 0x0);
360 }
361
362 /* Re-enable in LSU. */
363 __asm__ __volatile__("flush %%g6\n\t"
364 "membar #Sync\n\t"
365 "stxa %0, [%%g0] %1\n\t"
366 "membar #Sync"
367 : /* no outputs */
368 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
369 LSU_CONTROL_IM | LSU_CONTROL_DM),
370 "i" (ASI_LSU_CONTROL)
371 : "memory");
372 }
373
374 static void spitfire_enable_estate_errors(void)
375 {
376 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
377 "membar #Sync"
378 : /* no outputs */
379 : "r" (ESTATE_ERR_ALL),
380 "i" (ASI_ESTATE_ERROR_EN));
381 }
382
383 static char ecc_syndrome_table[] = {
384 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
385 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
386 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
387 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
388 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
389 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
390 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
391 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
392 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
393 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
394 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
395 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
396 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
397 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
398 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
399 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
400 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
401 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
402 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
403 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
404 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
405 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
406 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
407 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
408 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
409 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
410 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
411 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
412 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
413 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
414 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
415 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
416 };
417
418 static char *syndrome_unknown = "<Unknown>";
419
420 static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
421 {
422 unsigned short scode;
423 char memmod_str[64], *p;
424
425 if (udbl & bit) {
426 scode = ecc_syndrome_table[udbl & 0xff];
427 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
428 p = syndrome_unknown;
429 else
430 p = memmod_str;
431 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
432 "Memory Module \"%s\"\n",
433 smp_processor_id(), scode, p);
434 }
435
436 if (udbh & bit) {
437 scode = ecc_syndrome_table[udbh & 0xff];
438 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
439 p = syndrome_unknown;
440 else
441 p = memmod_str;
442 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
443 "Memory Module \"%s\"\n",
444 smp_processor_id(), scode, p);
445 }
446
447 }
448
449 static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
450 {
451
452 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
453 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
454 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
455
456 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
457
458 /* We always log it, even if someone is listening for this
459 * trap.
460 */
461 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
462 0, TRAP_TYPE_CEE, SIGTRAP);
463
464 /* The Correctable ECC Error trap does not disable I/D caches. So
465 * we only have to restore the ESTATE Error Enable register.
466 */
467 spitfire_enable_estate_errors();
468 }
469
470 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)
471 {
472 siginfo_t info;
473
474 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
475 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
476 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
477
478 /* XXX add more human friendly logging of the error status
479 * XXX as is implemented for cheetah
480 */
481
482 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
483
484 /* We always log it, even if someone is listening for this
485 * trap.
486 */
487 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
488 0, tt, SIGTRAP);
489
490 if (regs->tstate & TSTATE_PRIV) {
491 if (tl1)
492 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
493 die_if_kernel("UE", regs);
494 }
495
496 /* XXX need more intelligent processing here, such as is implemented
497 * XXX for cheetah errors, in fact if the E-cache still holds the
498 * XXX line with bad parity this will loop
499 */
500
501 spitfire_clean_and_reenable_l1_caches();
502 spitfire_enable_estate_errors();
503
504 if (test_thread_flag(TIF_32BIT)) {
505 regs->tpc &= 0xffffffff;
506 regs->tnpc &= 0xffffffff;
507 }
508 info.si_signo = SIGBUS;
509 info.si_errno = 0;
510 info.si_code = BUS_OBJERR;
511 info.si_addr = (void *)0;
512 info.si_trapno = 0;
513 force_sig_info(SIGBUS, &info, current);
514 }
515
516 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
517 {
518 unsigned long afsr, tt, udbh, udbl;
519 int tl1;
520
521 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
522 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
523 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
524 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
525 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
526
527 #ifdef CONFIG_PCI
528 if (tt == TRAP_TYPE_DAE &&
529 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
530 spitfire_clean_and_reenable_l1_caches();
531 spitfire_enable_estate_errors();
532
533 pci_poke_faulted = 1;
534 regs->tnpc = regs->tpc + 4;
535 return;
536 }
537 #endif
538
539 if (afsr & SFAFSR_UE)
540 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
541
542 if (tt == TRAP_TYPE_CEE) {
543 /* Handle the case where we took a CEE trap, but ACK'd
544 * only the UE state in the UDB error registers.
545 */
546 if (afsr & SFAFSR_UE) {
547 if (udbh & UDBE_CE) {
548 __asm__ __volatile__(
549 "stxa %0, [%1] %2\n\t"
550 "membar #Sync"
551 : /* no outputs */
552 : "r" (udbh & UDBE_CE),
553 "r" (0x0), "i" (ASI_UDB_ERROR_W));
554 }
555 if (udbl & UDBE_CE) {
556 __asm__ __volatile__(
557 "stxa %0, [%1] %2\n\t"
558 "membar #Sync"
559 : /* no outputs */
560 : "r" (udbl & UDBE_CE),
561 "r" (0x18), "i" (ASI_UDB_ERROR_W));
562 }
563 }
564
565 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
566 }
567 }
568
569 int cheetah_pcache_forced_on;
570
571 void cheetah_enable_pcache(void)
572 {
573 unsigned long dcr;
574
575 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
576 smp_processor_id());
577
578 __asm__ __volatile__("ldxa [%%g0] %1, %0"
579 : "=r" (dcr)
580 : "i" (ASI_DCU_CONTROL_REG));
581 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
582 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
583 "membar #Sync"
584 : /* no outputs */
585 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
586 }
587
588 /* Cheetah error trap handling. */
589 static unsigned long ecache_flush_physbase;
590 static unsigned long ecache_flush_linesize;
591 static unsigned long ecache_flush_size;
592
593 /* This table is ordered in priority of errors and matches the
594 * AFAR overwrite policy as well.
595 */
596
597 struct afsr_error_table {
598 unsigned long mask;
599 const char *name;
600 };
601
602 static const char CHAFSR_PERR_msg[] =
603 "System interface protocol error";
604 static const char CHAFSR_IERR_msg[] =
605 "Internal processor error";
606 static const char CHAFSR_ISAP_msg[] =
607 "System request parity error on incoming addresss";
608 static const char CHAFSR_UCU_msg[] =
609 "Uncorrectable E-cache ECC error for ifetch/data";
610 static const char CHAFSR_UCC_msg[] =
611 "SW Correctable E-cache ECC error for ifetch/data";
612 static const char CHAFSR_UE_msg[] =
613 "Uncorrectable system bus data ECC error for read";
614 static const char CHAFSR_EDU_msg[] =
615 "Uncorrectable E-cache ECC error for stmerge/blkld";
616 static const char CHAFSR_EMU_msg[] =
617 "Uncorrectable system bus MTAG error";
618 static const char CHAFSR_WDU_msg[] =
619 "Uncorrectable E-cache ECC error for writeback";
620 static const char CHAFSR_CPU_msg[] =
621 "Uncorrectable ECC error for copyout";
622 static const char CHAFSR_CE_msg[] =
623 "HW corrected system bus data ECC error for read";
624 static const char CHAFSR_EDC_msg[] =
625 "HW corrected E-cache ECC error for stmerge/blkld";
626 static const char CHAFSR_EMC_msg[] =
627 "HW corrected system bus MTAG ECC error";
628 static const char CHAFSR_WDC_msg[] =
629 "HW corrected E-cache ECC error for writeback";
630 static const char CHAFSR_CPC_msg[] =
631 "HW corrected ECC error for copyout";
632 static const char CHAFSR_TO_msg[] =
633 "Unmapped error from system bus";
634 static const char CHAFSR_BERR_msg[] =
635 "Bus error response from system bus";
636 static const char CHAFSR_IVC_msg[] =
637 "HW corrected system bus data ECC error for ivec read";
638 static const char CHAFSR_IVU_msg[] =
639 "Uncorrectable system bus data ECC error for ivec read";
640 static struct afsr_error_table __cheetah_error_table[] = {
641 { CHAFSR_PERR, CHAFSR_PERR_msg },
642 { CHAFSR_IERR, CHAFSR_IERR_msg },
643 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
644 { CHAFSR_UCU, CHAFSR_UCU_msg },
645 { CHAFSR_UCC, CHAFSR_UCC_msg },
646 { CHAFSR_UE, CHAFSR_UE_msg },
647 { CHAFSR_EDU, CHAFSR_EDU_msg },
648 { CHAFSR_EMU, CHAFSR_EMU_msg },
649 { CHAFSR_WDU, CHAFSR_WDU_msg },
650 { CHAFSR_CPU, CHAFSR_CPU_msg },
651 { CHAFSR_CE, CHAFSR_CE_msg },
652 { CHAFSR_EDC, CHAFSR_EDC_msg },
653 { CHAFSR_EMC, CHAFSR_EMC_msg },
654 { CHAFSR_WDC, CHAFSR_WDC_msg },
655 { CHAFSR_CPC, CHAFSR_CPC_msg },
656 { CHAFSR_TO, CHAFSR_TO_msg },
657 { CHAFSR_BERR, CHAFSR_BERR_msg },
658 /* These two do not update the AFAR. */
659 { CHAFSR_IVC, CHAFSR_IVC_msg },
660 { CHAFSR_IVU, CHAFSR_IVU_msg },
661 { 0, NULL },
662 };
663 static const char CHPAFSR_DTO_msg[] =
664 "System bus unmapped error for prefetch/storequeue-read";
665 static const char CHPAFSR_DBERR_msg[] =
666 "System bus error for prefetch/storequeue-read";
667 static const char CHPAFSR_THCE_msg[] =
668 "Hardware corrected E-cache Tag ECC error";
669 static const char CHPAFSR_TSCE_msg[] =
670 "SW handled correctable E-cache Tag ECC error";
671 static const char CHPAFSR_TUE_msg[] =
672 "Uncorrectable E-cache Tag ECC error";
673 static const char CHPAFSR_DUE_msg[] =
674 "System bus uncorrectable data ECC error due to prefetch/store-fill";
675 static struct afsr_error_table __cheetah_plus_error_table[] = {
676 { CHAFSR_PERR, CHAFSR_PERR_msg },
677 { CHAFSR_IERR, CHAFSR_IERR_msg },
678 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
679 { CHAFSR_UCU, CHAFSR_UCU_msg },
680 { CHAFSR_UCC, CHAFSR_UCC_msg },
681 { CHAFSR_UE, CHAFSR_UE_msg },
682 { CHAFSR_EDU, CHAFSR_EDU_msg },
683 { CHAFSR_EMU, CHAFSR_EMU_msg },
684 { CHAFSR_WDU, CHAFSR_WDU_msg },
685 { CHAFSR_CPU, CHAFSR_CPU_msg },
686 { CHAFSR_CE, CHAFSR_CE_msg },
687 { CHAFSR_EDC, CHAFSR_EDC_msg },
688 { CHAFSR_EMC, CHAFSR_EMC_msg },
689 { CHAFSR_WDC, CHAFSR_WDC_msg },
690 { CHAFSR_CPC, CHAFSR_CPC_msg },
691 { CHAFSR_TO, CHAFSR_TO_msg },
692 { CHAFSR_BERR, CHAFSR_BERR_msg },
693 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
694 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
695 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
696 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
697 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
698 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
699 /* These two do not update the AFAR. */
700 { CHAFSR_IVC, CHAFSR_IVC_msg },
701 { CHAFSR_IVU, CHAFSR_IVU_msg },
702 { 0, NULL },
703 };
704 static const char JPAFSR_JETO_msg[] =
705 "System interface protocol error, hw timeout caused";
706 static const char JPAFSR_SCE_msg[] =
707 "Parity error on system snoop results";
708 static const char JPAFSR_JEIC_msg[] =
709 "System interface protocol error, illegal command detected";
710 static const char JPAFSR_JEIT_msg[] =
711 "System interface protocol error, illegal ADTYPE detected";
712 static const char JPAFSR_OM_msg[] =
713 "Out of range memory error has occurred";
714 static const char JPAFSR_ETP_msg[] =
715 "Parity error on L2 cache tag SRAM";
716 static const char JPAFSR_UMS_msg[] =
717 "Error due to unsupported store";
718 static const char JPAFSR_RUE_msg[] =
719 "Uncorrectable ECC error from remote cache/memory";
720 static const char JPAFSR_RCE_msg[] =
721 "Correctable ECC error from remote cache/memory";
722 static const char JPAFSR_BP_msg[] =
723 "JBUS parity error on returned read data";
724 static const char JPAFSR_WBP_msg[] =
725 "JBUS parity error on data for writeback or block store";
726 static const char JPAFSR_FRC_msg[] =
727 "Foreign read to DRAM incurring correctable ECC error";
728 static const char JPAFSR_FRU_msg[] =
729 "Foreign read to DRAM incurring uncorrectable ECC error";
730 static struct afsr_error_table __jalapeno_error_table[] = {
731 { JPAFSR_JETO, JPAFSR_JETO_msg },
732 { JPAFSR_SCE, JPAFSR_SCE_msg },
733 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
734 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
735 { CHAFSR_PERR, CHAFSR_PERR_msg },
736 { CHAFSR_IERR, CHAFSR_IERR_msg },
737 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
738 { CHAFSR_UCU, CHAFSR_UCU_msg },
739 { CHAFSR_UCC, CHAFSR_UCC_msg },
740 { CHAFSR_UE, CHAFSR_UE_msg },
741 { CHAFSR_EDU, CHAFSR_EDU_msg },
742 { JPAFSR_OM, JPAFSR_OM_msg },
743 { CHAFSR_WDU, CHAFSR_WDU_msg },
744 { CHAFSR_CPU, CHAFSR_CPU_msg },
745 { CHAFSR_CE, CHAFSR_CE_msg },
746 { CHAFSR_EDC, CHAFSR_EDC_msg },
747 { JPAFSR_ETP, JPAFSR_ETP_msg },
748 { CHAFSR_WDC, CHAFSR_WDC_msg },
749 { CHAFSR_CPC, CHAFSR_CPC_msg },
750 { CHAFSR_TO, CHAFSR_TO_msg },
751 { CHAFSR_BERR, CHAFSR_BERR_msg },
752 { JPAFSR_UMS, JPAFSR_UMS_msg },
753 { JPAFSR_RUE, JPAFSR_RUE_msg },
754 { JPAFSR_RCE, JPAFSR_RCE_msg },
755 { JPAFSR_BP, JPAFSR_BP_msg },
756 { JPAFSR_WBP, JPAFSR_WBP_msg },
757 { JPAFSR_FRC, JPAFSR_FRC_msg },
758 { JPAFSR_FRU, JPAFSR_FRU_msg },
759 /* These two do not update the AFAR. */
760 { CHAFSR_IVU, CHAFSR_IVU_msg },
761 { 0, NULL },
762 };
763 static struct afsr_error_table *cheetah_error_table;
764 static unsigned long cheetah_afsr_errors;
765
766 struct cheetah_err_info *cheetah_error_log;
767
768 static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
769 {
770 struct cheetah_err_info *p;
771 int cpu = smp_processor_id();
772
773 if (!cheetah_error_log)
774 return NULL;
775
776 p = cheetah_error_log + (cpu * 2);
777 if ((afsr & CHAFSR_TL1) != 0UL)
778 p++;
779
780 return p;
781 }
782
783 extern unsigned int tl0_icpe[], tl1_icpe[];
784 extern unsigned int tl0_dcpe[], tl1_dcpe[];
785 extern unsigned int tl0_fecc[], tl1_fecc[];
786 extern unsigned int tl0_cee[], tl1_cee[];
787 extern unsigned int tl0_iae[], tl1_iae[];
788 extern unsigned int tl0_dae[], tl1_dae[];
789 extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
790 extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
791 extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
792 extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
793 extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
794
795 void __init cheetah_ecache_flush_init(void)
796 {
797 unsigned long largest_size, smallest_linesize, order, ver;
798 int i, sz;
799
800 /* Scan all cpu device tree nodes, note two values:
801 * 1) largest E-cache size
802 * 2) smallest E-cache line size
803 */
804 largest_size = 0UL;
805 smallest_linesize = ~0UL;
806
807 for (i = 0; i < NR_CPUS; i++) {
808 unsigned long val;
809
810 val = cpu_data(i).ecache_size;
811 if (!val)
812 continue;
813
814 if (val > largest_size)
815 largest_size = val;
816
817 val = cpu_data(i).ecache_line_size;
818 if (val < smallest_linesize)
819 smallest_linesize = val;
820
821 }
822
823 if (largest_size == 0UL || smallest_linesize == ~0UL) {
824 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
825 "parameters.\n");
826 prom_halt();
827 }
828
829 ecache_flush_size = (2 * largest_size);
830 ecache_flush_linesize = smallest_linesize;
831
832 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
833
834 if (ecache_flush_physbase == ~0UL) {
835 prom_printf("cheetah_ecache_flush_init: Cannot find %d byte "
836 "contiguous physical memory.\n",
837 ecache_flush_size);
838 prom_halt();
839 }
840
841 /* Now allocate error trap reporting scoreboard. */
842 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
843 for (order = 0; order < MAX_ORDER; order++) {
844 if ((PAGE_SIZE << order) >= sz)
845 break;
846 }
847 cheetah_error_log = (struct cheetah_err_info *)
848 __get_free_pages(GFP_KERNEL, order);
849 if (!cheetah_error_log) {
850 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
851 "error logging scoreboard (%d bytes).\n", sz);
852 prom_halt();
853 }
854 memset(cheetah_error_log, 0, PAGE_SIZE << order);
855
856 /* Mark all AFSRs as invalid so that the trap handler will
857 * log new new information there.
858 */
859 for (i = 0; i < 2 * NR_CPUS; i++)
860 cheetah_error_log[i].afsr = CHAFSR_INVALID;
861
862 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
863 if ((ver >> 32) == __JALAPENO_ID ||
864 (ver >> 32) == __SERRANO_ID) {
865 cheetah_error_table = &__jalapeno_error_table[0];
866 cheetah_afsr_errors = JPAFSR_ERRORS;
867 } else if ((ver >> 32) == 0x003e0015) {
868 cheetah_error_table = &__cheetah_plus_error_table[0];
869 cheetah_afsr_errors = CHPAFSR_ERRORS;
870 } else {
871 cheetah_error_table = &__cheetah_error_table[0];
872 cheetah_afsr_errors = CHAFSR_ERRORS;
873 }
874
875 /* Now patch trap tables. */
876 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
877 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
878 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
879 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
880 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
881 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
882 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
883 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
884 if (tlb_type == cheetah_plus) {
885 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
886 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
887 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
888 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
889 }
890 flushi(PAGE_OFFSET);
891 }
892
893 static void cheetah_flush_ecache(void)
894 {
895 unsigned long flush_base = ecache_flush_physbase;
896 unsigned long flush_linesize = ecache_flush_linesize;
897 unsigned long flush_size = ecache_flush_size;
898
899 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
900 " bne,pt %%xcc, 1b\n\t"
901 " ldxa [%2 + %0] %3, %%g0\n\t"
902 : "=&r" (flush_size)
903 : "0" (flush_size), "r" (flush_base),
904 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
905 }
906
907 static void cheetah_flush_ecache_line(unsigned long physaddr)
908 {
909 unsigned long alias;
910
911 physaddr &= ~(8UL - 1UL);
912 physaddr = (ecache_flush_physbase +
913 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
914 alias = physaddr + (ecache_flush_size >> 1UL);
915 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
916 "ldxa [%1] %2, %%g0\n\t"
917 "membar #Sync"
918 : /* no outputs */
919 : "r" (physaddr), "r" (alias),
920 "i" (ASI_PHYS_USE_EC));
921 }
922
923 /* Unfortunately, the diagnostic access to the I-cache tags we need to
924 * use to clear the thing interferes with I-cache coherency transactions.
925 *
926 * So we must only flush the I-cache when it is disabled.
927 */
928 static void __cheetah_flush_icache(void)
929 {
930 unsigned int icache_size, icache_line_size;
931 unsigned long addr;
932
933 icache_size = local_cpu_data().icache_size;
934 icache_line_size = local_cpu_data().icache_line_size;
935
936 /* Clear the valid bits in all the tags. */
937 for (addr = 0; addr < icache_size; addr += icache_line_size) {
938 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
939 "membar #Sync"
940 : /* no outputs */
941 : "r" (addr | (2 << 3)),
942 "i" (ASI_IC_TAG));
943 }
944 }
945
946 static void cheetah_flush_icache(void)
947 {
948 unsigned long dcu_save;
949
950 /* Save current DCU, disable I-cache. */
951 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
952 "or %0, %2, %%g1\n\t"
953 "stxa %%g1, [%%g0] %1\n\t"
954 "membar #Sync"
955 : "=r" (dcu_save)
956 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
957 : "g1");
958
959 __cheetah_flush_icache();
960
961 /* Restore DCU register */
962 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
963 "membar #Sync"
964 : /* no outputs */
965 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
966 }
967
968 static void cheetah_flush_dcache(void)
969 {
970 unsigned int dcache_size, dcache_line_size;
971 unsigned long addr;
972
973 dcache_size = local_cpu_data().dcache_size;
974 dcache_line_size = local_cpu_data().dcache_line_size;
975
976 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
977 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
978 "membar #Sync"
979 : /* no outputs */
980 : "r" (addr), "i" (ASI_DCACHE_TAG));
981 }
982 }
983
984 /* In order to make the even parity correct we must do two things.
985 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
986 * Next, we clear out all 32-bytes of data for that line. Data of
987 * all-zero + tag parity value of zero == correct parity.
988 */
989 static void cheetah_plus_zap_dcache_parity(void)
990 {
991 unsigned int dcache_size, dcache_line_size;
992 unsigned long addr;
993
994 dcache_size = local_cpu_data().dcache_size;
995 dcache_line_size = local_cpu_data().dcache_line_size;
996
997 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
998 unsigned long tag = (addr >> 14);
999 unsigned long line;
1000
1001 __asm__ __volatile__("membar #Sync\n\t"
1002 "stxa %0, [%1] %2\n\t"
1003 "membar #Sync"
1004 : /* no outputs */
1005 : "r" (tag), "r" (addr),
1006 "i" (ASI_DCACHE_UTAG));
1007 for (line = addr; line < addr + dcache_line_size; line += 8)
1008 __asm__ __volatile__("membar #Sync\n\t"
1009 "stxa %%g0, [%0] %1\n\t"
1010 "membar #Sync"
1011 : /* no outputs */
1012 : "r" (line),
1013 "i" (ASI_DCACHE_DATA));
1014 }
1015 }
1016
1017 /* Conversion tables used to frob Cheetah AFSR syndrome values into
1018 * something palatable to the memory controller driver get_unumber
1019 * routine.
1020 */
1021 #define MT0 137
1022 #define MT1 138
1023 #define MT2 139
1024 #define NONE 254
1025 #define MTC0 140
1026 #define MTC1 141
1027 #define MTC2 142
1028 #define MTC3 143
1029 #define C0 128
1030 #define C1 129
1031 #define C2 130
1032 #define C3 131
1033 #define C4 132
1034 #define C5 133
1035 #define C6 134
1036 #define C7 135
1037 #define C8 136
1038 #define M2 144
1039 #define M3 145
1040 #define M4 146
1041 #define M 147
1042 static unsigned char cheetah_ecc_syntab[] = {
1043 /*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1044 /*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1045 /*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1046 /*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1047 /*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1048 /*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1049 /*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1050 /*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1051 /*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1052 /*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1053 /*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1054 /*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1055 /*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1056 /*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1057 /*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1058 /*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1059 /*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1060 /*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1061 /*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1062 /*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1063 /*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1064 /*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1065 /*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1066 /*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1067 /*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1068 /*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1069 /*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1070 /*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1071 /*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1072 /*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1073 /*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1074 /*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1075 };
1076 static unsigned char cheetah_mtag_syntab[] = {
1077 NONE, MTC0,
1078 MTC1, NONE,
1079 MTC2, NONE,
1080 NONE, MT0,
1081 MTC3, NONE,
1082 NONE, MT1,
1083 NONE, MT2,
1084 NONE, NONE
1085 };
1086
1087 /* Return the highest priority error conditon mentioned. */
1088 static inline unsigned long cheetah_get_hipri(unsigned long afsr)
1089 {
1090 unsigned long tmp = 0;
1091 int i;
1092
1093 for (i = 0; cheetah_error_table[i].mask; i++) {
1094 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1095 return tmp;
1096 }
1097 return tmp;
1098 }
1099
1100 static const char *cheetah_get_string(unsigned long bit)
1101 {
1102 int i;
1103
1104 for (i = 0; cheetah_error_table[i].mask; i++) {
1105 if ((bit & cheetah_error_table[i].mask) != 0UL)
1106 return cheetah_error_table[i].name;
1107 }
1108 return "???";
1109 }
1110
1111 static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1112 unsigned long afsr, unsigned long afar, int recoverable)
1113 {
1114 unsigned long hipri;
1115 char unum[256];
1116
1117 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1118 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1119 afsr, afar,
1120 (afsr & CHAFSR_TL1) ? 1 : 0);
1121 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1122 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1123 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1124 printk("%s" "ERROR(%d): ",
1125 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1126 printk("TPC<%pS>\n", (void *) regs->tpc);
1127 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1128 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1129 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1130 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1131 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1132 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1133 hipri = cheetah_get_hipri(afsr);
1134 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1135 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1136 hipri, cheetah_get_string(hipri));
1137
1138 /* Try to get unumber if relevant. */
1139 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1140 CHAFSR_CPC | CHAFSR_CPU | \
1141 CHAFSR_UE | CHAFSR_CE | \
1142 CHAFSR_EDC | CHAFSR_EDU | \
1143 CHAFSR_UCC | CHAFSR_UCU | \
1144 CHAFSR_WDU | CHAFSR_WDC)
1145 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1146 if (afsr & ESYND_ERRORS) {
1147 int syndrome;
1148 int ret;
1149
1150 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1151 syndrome = cheetah_ecc_syntab[syndrome];
1152 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1153 if (ret != -1)
1154 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1155 (recoverable ? KERN_WARNING : KERN_CRIT),
1156 smp_processor_id(), unum);
1157 } else if (afsr & MSYND_ERRORS) {
1158 int syndrome;
1159 int ret;
1160
1161 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1162 syndrome = cheetah_mtag_syntab[syndrome];
1163 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1164 if (ret != -1)
1165 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1166 (recoverable ? KERN_WARNING : KERN_CRIT),
1167 smp_processor_id(), unum);
1168 }
1169
1170 /* Now dump the cache snapshots. */
1171 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx]\n",
1172 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1173 (int) info->dcache_index,
1174 info->dcache_tag,
1175 info->dcache_utag,
1176 info->dcache_stag);
1177 printk("%s" "ERROR(%d): D-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1178 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1179 info->dcache_data[0],
1180 info->dcache_data[1],
1181 info->dcache_data[2],
1182 info->dcache_data[3]);
1183 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx] "
1184 "u[%016lx] l[%016lx]\n",
1185 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1186 (int) info->icache_index,
1187 info->icache_tag,
1188 info->icache_utag,
1189 info->icache_stag,
1190 info->icache_upper,
1191 info->icache_lower);
1192 printk("%s" "ERROR(%d): I-cache INSN0[%016lx] INSN1[%016lx] INSN2[%016lx] INSN3[%016lx]\n",
1193 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1194 info->icache_data[0],
1195 info->icache_data[1],
1196 info->icache_data[2],
1197 info->icache_data[3]);
1198 printk("%s" "ERROR(%d): I-cache INSN4[%016lx] INSN5[%016lx] INSN6[%016lx] INSN7[%016lx]\n",
1199 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1200 info->icache_data[4],
1201 info->icache_data[5],
1202 info->icache_data[6],
1203 info->icache_data[7]);
1204 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016lx]\n",
1205 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1206 (int) info->ecache_index, info->ecache_tag);
1207 printk("%s" "ERROR(%d): E-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1208 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1209 info->ecache_data[0],
1210 info->ecache_data[1],
1211 info->ecache_data[2],
1212 info->ecache_data[3]);
1213
1214 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1215 while (afsr != 0UL) {
1216 unsigned long bit = cheetah_get_hipri(afsr);
1217
1218 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1219 (recoverable ? KERN_WARNING : KERN_CRIT),
1220 bit, cheetah_get_string(bit));
1221
1222 afsr &= ~bit;
1223 }
1224
1225 if (!recoverable)
1226 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1227 }
1228
1229 static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1230 {
1231 unsigned long afsr, afar;
1232 int ret = 0;
1233
1234 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1235 : "=r" (afsr)
1236 : "i" (ASI_AFSR));
1237 if ((afsr & cheetah_afsr_errors) != 0) {
1238 if (logp != NULL) {
1239 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1240 : "=r" (afar)
1241 : "i" (ASI_AFAR));
1242 logp->afsr = afsr;
1243 logp->afar = afar;
1244 }
1245 ret = 1;
1246 }
1247 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1248 "membar #Sync\n\t"
1249 : : "r" (afsr), "i" (ASI_AFSR));
1250
1251 return ret;
1252 }
1253
1254 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1255 {
1256 struct cheetah_err_info local_snapshot, *p;
1257 int recoverable;
1258
1259 /* Flush E-cache */
1260 cheetah_flush_ecache();
1261
1262 p = cheetah_get_error_log(afsr);
1263 if (!p) {
1264 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1265 afsr, afar);
1266 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1267 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1268 prom_halt();
1269 }
1270
1271 /* Grab snapshot of logged error. */
1272 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1273
1274 /* If the current trap snapshot does not match what the
1275 * trap handler passed along into our args, big trouble.
1276 * In such a case, mark the local copy as invalid.
1277 *
1278 * Else, it matches and we mark the afsr in the non-local
1279 * copy as invalid so we may log new error traps there.
1280 */
1281 if (p->afsr != afsr || p->afar != afar)
1282 local_snapshot.afsr = CHAFSR_INVALID;
1283 else
1284 p->afsr = CHAFSR_INVALID;
1285
1286 cheetah_flush_icache();
1287 cheetah_flush_dcache();
1288
1289 /* Re-enable I-cache/D-cache */
1290 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1291 "or %%g1, %1, %%g1\n\t"
1292 "stxa %%g1, [%%g0] %0\n\t"
1293 "membar #Sync"
1294 : /* no outputs */
1295 : "i" (ASI_DCU_CONTROL_REG),
1296 "i" (DCU_DC | DCU_IC)
1297 : "g1");
1298
1299 /* Re-enable error reporting */
1300 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1301 "or %%g1, %1, %%g1\n\t"
1302 "stxa %%g1, [%%g0] %0\n\t"
1303 "membar #Sync"
1304 : /* no outputs */
1305 : "i" (ASI_ESTATE_ERROR_EN),
1306 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1307 : "g1");
1308
1309 /* Decide if we can continue after handling this trap and
1310 * logging the error.
1311 */
1312 recoverable = 1;
1313 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1314 recoverable = 0;
1315
1316 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1317 * error was logged while we had error reporting traps disabled.
1318 */
1319 if (cheetah_recheck_errors(&local_snapshot)) {
1320 unsigned long new_afsr = local_snapshot.afsr;
1321
1322 /* If we got a new asynchronous error, die... */
1323 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1324 CHAFSR_WDU | CHAFSR_CPU |
1325 CHAFSR_IVU | CHAFSR_UE |
1326 CHAFSR_BERR | CHAFSR_TO))
1327 recoverable = 0;
1328 }
1329
1330 /* Log errors. */
1331 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1332
1333 if (!recoverable)
1334 panic("Irrecoverable Fast-ECC error trap.\n");
1335
1336 /* Flush E-cache to kick the error trap handlers out. */
1337 cheetah_flush_ecache();
1338 }
1339
1340 /* Try to fix a correctable error by pushing the line out from
1341 * the E-cache. Recheck error reporting registers to see if the
1342 * problem is intermittent.
1343 */
1344 static int cheetah_fix_ce(unsigned long physaddr)
1345 {
1346 unsigned long orig_estate;
1347 unsigned long alias1, alias2;
1348 int ret;
1349
1350 /* Make sure correctable error traps are disabled. */
1351 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1352 "andn %0, %1, %%g1\n\t"
1353 "stxa %%g1, [%%g0] %2\n\t"
1354 "membar #Sync"
1355 : "=&r" (orig_estate)
1356 : "i" (ESTATE_ERROR_CEEN),
1357 "i" (ASI_ESTATE_ERROR_EN)
1358 : "g1");
1359
1360 /* We calculate alias addresses that will force the
1361 * cache line in question out of the E-cache. Then
1362 * we bring it back in with an atomic instruction so
1363 * that we get it in some modified/exclusive state,
1364 * then we displace it again to try and get proper ECC
1365 * pushed back into the system.
1366 */
1367 physaddr &= ~(8UL - 1UL);
1368 alias1 = (ecache_flush_physbase +
1369 (physaddr & ((ecache_flush_size >> 1) - 1)));
1370 alias2 = alias1 + (ecache_flush_size >> 1);
1371 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1372 "ldxa [%1] %3, %%g0\n\t"
1373 "casxa [%2] %3, %%g0, %%g0\n\t"
1374 "ldxa [%0] %3, %%g0\n\t"
1375 "ldxa [%1] %3, %%g0\n\t"
1376 "membar #Sync"
1377 : /* no outputs */
1378 : "r" (alias1), "r" (alias2),
1379 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1380
1381 /* Did that trigger another error? */
1382 if (cheetah_recheck_errors(NULL)) {
1383 /* Try one more time. */
1384 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1385 "membar #Sync"
1386 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1387 if (cheetah_recheck_errors(NULL))
1388 ret = 2;
1389 else
1390 ret = 1;
1391 } else {
1392 /* No new error, intermittent problem. */
1393 ret = 0;
1394 }
1395
1396 /* Restore error enables. */
1397 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1398 "membar #Sync"
1399 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1400
1401 return ret;
1402 }
1403
1404 /* Return non-zero if PADDR is a valid physical memory address. */
1405 static int cheetah_check_main_memory(unsigned long paddr)
1406 {
1407 unsigned long vaddr = PAGE_OFFSET + paddr;
1408
1409 if (vaddr > (unsigned long) high_memory)
1410 return 0;
1411
1412 return kern_addr_valid(vaddr);
1413 }
1414
1415 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1416 {
1417 struct cheetah_err_info local_snapshot, *p;
1418 int recoverable, is_memory;
1419
1420 p = cheetah_get_error_log(afsr);
1421 if (!p) {
1422 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1423 afsr, afar);
1424 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1425 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1426 prom_halt();
1427 }
1428
1429 /* Grab snapshot of logged error. */
1430 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1431
1432 /* If the current trap snapshot does not match what the
1433 * trap handler passed along into our args, big trouble.
1434 * In such a case, mark the local copy as invalid.
1435 *
1436 * Else, it matches and we mark the afsr in the non-local
1437 * copy as invalid so we may log new error traps there.
1438 */
1439 if (p->afsr != afsr || p->afar != afar)
1440 local_snapshot.afsr = CHAFSR_INVALID;
1441 else
1442 p->afsr = CHAFSR_INVALID;
1443
1444 is_memory = cheetah_check_main_memory(afar);
1445
1446 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1447 /* XXX Might want to log the results of this operation
1448 * XXX somewhere... -DaveM
1449 */
1450 cheetah_fix_ce(afar);
1451 }
1452
1453 {
1454 int flush_all, flush_line;
1455
1456 flush_all = flush_line = 0;
1457 if ((afsr & CHAFSR_EDC) != 0UL) {
1458 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1459 flush_line = 1;
1460 else
1461 flush_all = 1;
1462 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1463 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1464 flush_line = 1;
1465 else
1466 flush_all = 1;
1467 }
1468
1469 /* Trap handler only disabled I-cache, flush it. */
1470 cheetah_flush_icache();
1471
1472 /* Re-enable I-cache */
1473 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1474 "or %%g1, %1, %%g1\n\t"
1475 "stxa %%g1, [%%g0] %0\n\t"
1476 "membar #Sync"
1477 : /* no outputs */
1478 : "i" (ASI_DCU_CONTROL_REG),
1479 "i" (DCU_IC)
1480 : "g1");
1481
1482 if (flush_all)
1483 cheetah_flush_ecache();
1484 else if (flush_line)
1485 cheetah_flush_ecache_line(afar);
1486 }
1487
1488 /* Re-enable error reporting */
1489 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1490 "or %%g1, %1, %%g1\n\t"
1491 "stxa %%g1, [%%g0] %0\n\t"
1492 "membar #Sync"
1493 : /* no outputs */
1494 : "i" (ASI_ESTATE_ERROR_EN),
1495 "i" (ESTATE_ERROR_CEEN)
1496 : "g1");
1497
1498 /* Decide if we can continue after handling this trap and
1499 * logging the error.
1500 */
1501 recoverable = 1;
1502 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1503 recoverable = 0;
1504
1505 /* Re-check AFSR/AFAR */
1506 (void) cheetah_recheck_errors(&local_snapshot);
1507
1508 /* Log errors. */
1509 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1510
1511 if (!recoverable)
1512 panic("Irrecoverable Correctable-ECC error trap.\n");
1513 }
1514
1515 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1516 {
1517 struct cheetah_err_info local_snapshot, *p;
1518 int recoverable, is_memory;
1519
1520 #ifdef CONFIG_PCI
1521 /* Check for the special PCI poke sequence. */
1522 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1523 cheetah_flush_icache();
1524 cheetah_flush_dcache();
1525
1526 /* Re-enable I-cache/D-cache */
1527 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1528 "or %%g1, %1, %%g1\n\t"
1529 "stxa %%g1, [%%g0] %0\n\t"
1530 "membar #Sync"
1531 : /* no outputs */
1532 : "i" (ASI_DCU_CONTROL_REG),
1533 "i" (DCU_DC | DCU_IC)
1534 : "g1");
1535
1536 /* Re-enable error reporting */
1537 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1538 "or %%g1, %1, %%g1\n\t"
1539 "stxa %%g1, [%%g0] %0\n\t"
1540 "membar #Sync"
1541 : /* no outputs */
1542 : "i" (ASI_ESTATE_ERROR_EN),
1543 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1544 : "g1");
1545
1546 (void) cheetah_recheck_errors(NULL);
1547
1548 pci_poke_faulted = 1;
1549 regs->tpc += 4;
1550 regs->tnpc = regs->tpc + 4;
1551 return;
1552 }
1553 #endif
1554
1555 p = cheetah_get_error_log(afsr);
1556 if (!p) {
1557 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1558 afsr, afar);
1559 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1560 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1561 prom_halt();
1562 }
1563
1564 /* Grab snapshot of logged error. */
1565 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1566
1567 /* If the current trap snapshot does not match what the
1568 * trap handler passed along into our args, big trouble.
1569 * In such a case, mark the local copy as invalid.
1570 *
1571 * Else, it matches and we mark the afsr in the non-local
1572 * copy as invalid so we may log new error traps there.
1573 */
1574 if (p->afsr != afsr || p->afar != afar)
1575 local_snapshot.afsr = CHAFSR_INVALID;
1576 else
1577 p->afsr = CHAFSR_INVALID;
1578
1579 is_memory = cheetah_check_main_memory(afar);
1580
1581 {
1582 int flush_all, flush_line;
1583
1584 flush_all = flush_line = 0;
1585 if ((afsr & CHAFSR_EDU) != 0UL) {
1586 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1587 flush_line = 1;
1588 else
1589 flush_all = 1;
1590 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1591 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1592 flush_line = 1;
1593 else
1594 flush_all = 1;
1595 }
1596
1597 cheetah_flush_icache();
1598 cheetah_flush_dcache();
1599
1600 /* Re-enable I/D caches */
1601 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1602 "or %%g1, %1, %%g1\n\t"
1603 "stxa %%g1, [%%g0] %0\n\t"
1604 "membar #Sync"
1605 : /* no outputs */
1606 : "i" (ASI_DCU_CONTROL_REG),
1607 "i" (DCU_IC | DCU_DC)
1608 : "g1");
1609
1610 if (flush_all)
1611 cheetah_flush_ecache();
1612 else if (flush_line)
1613 cheetah_flush_ecache_line(afar);
1614 }
1615
1616 /* Re-enable error reporting */
1617 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1618 "or %%g1, %1, %%g1\n\t"
1619 "stxa %%g1, [%%g0] %0\n\t"
1620 "membar #Sync"
1621 : /* no outputs */
1622 : "i" (ASI_ESTATE_ERROR_EN),
1623 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1624 : "g1");
1625
1626 /* Decide if we can continue after handling this trap and
1627 * logging the error.
1628 */
1629 recoverable = 1;
1630 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1631 recoverable = 0;
1632
1633 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1634 * error was logged while we had error reporting traps disabled.
1635 */
1636 if (cheetah_recheck_errors(&local_snapshot)) {
1637 unsigned long new_afsr = local_snapshot.afsr;
1638
1639 /* If we got a new asynchronous error, die... */
1640 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1641 CHAFSR_WDU | CHAFSR_CPU |
1642 CHAFSR_IVU | CHAFSR_UE |
1643 CHAFSR_BERR | CHAFSR_TO))
1644 recoverable = 0;
1645 }
1646
1647 /* Log errors. */
1648 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1649
1650 /* "Recoverable" here means we try to yank the page from ever
1651 * being newly used again. This depends upon a few things:
1652 * 1) Must be main memory, and AFAR must be valid.
1653 * 2) If we trapped from user, OK.
1654 * 3) Else, if we trapped from kernel we must find exception
1655 * table entry (ie. we have to have been accessing user
1656 * space).
1657 *
1658 * If AFAR is not in main memory, or we trapped from kernel
1659 * and cannot find an exception table entry, it is unacceptable
1660 * to try and continue.
1661 */
1662 if (recoverable && is_memory) {
1663 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1664 /* OK, usermode access. */
1665 recoverable = 1;
1666 } else {
1667 const struct exception_table_entry *entry;
1668
1669 entry = search_exception_tables(regs->tpc);
1670 if (entry) {
1671 /* OK, kernel access to userspace. */
1672 recoverable = 1;
1673
1674 } else {
1675 /* BAD, privileged state is corrupted. */
1676 recoverable = 0;
1677 }
1678
1679 if (recoverable) {
1680 if (pfn_valid(afar >> PAGE_SHIFT))
1681 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1682 else
1683 recoverable = 0;
1684
1685 /* Only perform fixup if we still have a
1686 * recoverable condition.
1687 */
1688 if (recoverable) {
1689 regs->tpc = entry->fixup;
1690 regs->tnpc = regs->tpc + 4;
1691 }
1692 }
1693 }
1694 } else {
1695 recoverable = 0;
1696 }
1697
1698 if (!recoverable)
1699 panic("Irrecoverable deferred error trap.\n");
1700 }
1701
1702 /* Handle a D/I cache parity error trap. TYPE is encoded as:
1703 *
1704 * Bit0: 0=dcache,1=icache
1705 * Bit1: 0=recoverable,1=unrecoverable
1706 *
1707 * The hardware has disabled both the I-cache and D-cache in
1708 * the %dcr register.
1709 */
1710 void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1711 {
1712 if (type & 0x1)
1713 __cheetah_flush_icache();
1714 else
1715 cheetah_plus_zap_dcache_parity();
1716 cheetah_flush_dcache();
1717
1718 /* Re-enable I-cache/D-cache */
1719 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1720 "or %%g1, %1, %%g1\n\t"
1721 "stxa %%g1, [%%g0] %0\n\t"
1722 "membar #Sync"
1723 : /* no outputs */
1724 : "i" (ASI_DCU_CONTROL_REG),
1725 "i" (DCU_DC | DCU_IC)
1726 : "g1");
1727
1728 if (type & 0x2) {
1729 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1730 smp_processor_id(),
1731 (type & 0x1) ? 'I' : 'D',
1732 regs->tpc);
1733 printk(KERN_EMERG "TPC<%pS>\n", (void *) regs->tpc);
1734 panic("Irrecoverable Cheetah+ parity error.");
1735 }
1736
1737 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1738 smp_processor_id(),
1739 (type & 0x1) ? 'I' : 'D',
1740 regs->tpc);
1741 printk(KERN_WARNING "TPC<%pS>\n", (void *) regs->tpc);
1742 }
1743
1744 struct sun4v_error_entry {
1745 u64 err_handle;
1746 u64 err_stick;
1747
1748 u32 err_type;
1749 #define SUN4V_ERR_TYPE_UNDEFINED 0
1750 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1751 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1752 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1753 #define SUN4V_ERR_TYPE_WARNING_RES 4
1754
1755 u32 err_attrs;
1756 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1757 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1758 #define SUN4V_ERR_ATTRS_PIO 0x00000004
1759 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1760 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1761 #define SUN4V_ERR_ATTRS_USER_MODE 0x01000000
1762 #define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000
1763 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1764
1765 u64 err_raddr;
1766 u32 err_size;
1767 u16 err_cpu;
1768 u16 err_pad;
1769 };
1770
1771 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1772 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1773
1774 static const char *sun4v_err_type_to_str(u32 type)
1775 {
1776 switch (type) {
1777 case SUN4V_ERR_TYPE_UNDEFINED:
1778 return "undefined";
1779 case SUN4V_ERR_TYPE_UNCORRECTED_RES:
1780 return "uncorrected resumable";
1781 case SUN4V_ERR_TYPE_PRECISE_NONRES:
1782 return "precise nonresumable";
1783 case SUN4V_ERR_TYPE_DEFERRED_NONRES:
1784 return "deferred nonresumable";
1785 case SUN4V_ERR_TYPE_WARNING_RES:
1786 return "warning resumable";
1787 default:
1788 return "unknown";
1789 };
1790 }
1791
1792 static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
1793 {
1794 int cnt;
1795
1796 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1797 printk("%s: err_handle[%lx] err_stick[%lx] err_type[%08x:%s]\n",
1798 pfx,
1799 ent->err_handle, ent->err_stick,
1800 ent->err_type,
1801 sun4v_err_type_to_str(ent->err_type));
1802 printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n",
1803 pfx,
1804 ent->err_attrs,
1805 ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ?
1806 "processor" : ""),
1807 ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ?
1808 "memory" : ""),
1809 ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ?
1810 "pio" : ""),
1811 ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ?
1812 "integer-regs" : ""),
1813 ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ?
1814 "fpu-regs" : ""),
1815 ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ?
1816 "user" : ""),
1817 ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ?
1818 "privileged" : ""),
1819 ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ?
1820 "queue-full" : ""));
1821 printk("%s: err_raddr[%016lx] err_size[%u] err_cpu[%u]\n",
1822 pfx,
1823 ent->err_raddr, ent->err_size, ent->err_cpu);
1824
1825 show_regs(regs);
1826
1827 if ((cnt = atomic_read(ocnt)) != 0) {
1828 atomic_set(ocnt, 0);
1829 wmb();
1830 printk("%s: Queue overflowed %d times.\n",
1831 pfx, cnt);
1832 }
1833 }
1834
1835 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
1836 * Log the event and clear the first word of the entry.
1837 */
1838 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
1839 {
1840 struct sun4v_error_entry *ent, local_copy;
1841 struct trap_per_cpu *tb;
1842 unsigned long paddr;
1843 int cpu;
1844
1845 cpu = get_cpu();
1846
1847 tb = &trap_block[cpu];
1848 paddr = tb->resum_kernel_buf_pa + offset;
1849 ent = __va(paddr);
1850
1851 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1852
1853 /* We have a local copy now, so release the entry. */
1854 ent->err_handle = 0;
1855 wmb();
1856
1857 put_cpu();
1858
1859 if (ent->err_type == SUN4V_ERR_TYPE_WARNING_RES) {
1860 /* If err_type is 0x4, it's a powerdown request. Do
1861 * not do the usual resumable error log because that
1862 * makes it look like some abnormal error.
1863 */
1864 printk(KERN_INFO "Power down request...\n");
1865 kill_cad_pid(SIGINT, 1);
1866 return;
1867 }
1868
1869 sun4v_log_error(regs, &local_copy, cpu,
1870 KERN_ERR "RESUMABLE ERROR",
1871 &sun4v_resum_oflow_cnt);
1872 }
1873
1874 /* If we try to printk() we'll probably make matters worse, by trying
1875 * to retake locks this cpu already holds or causing more errors. So
1876 * just bump a counter, and we'll report these counter bumps above.
1877 */
1878 void sun4v_resum_overflow(struct pt_regs *regs)
1879 {
1880 atomic_inc(&sun4v_resum_oflow_cnt);
1881 }
1882
1883 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
1884 * Log the event, clear the first word of the entry, and die.
1885 */
1886 void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
1887 {
1888 struct sun4v_error_entry *ent, local_copy;
1889 struct trap_per_cpu *tb;
1890 unsigned long paddr;
1891 int cpu;
1892
1893 cpu = get_cpu();
1894
1895 tb = &trap_block[cpu];
1896 paddr = tb->nonresum_kernel_buf_pa + offset;
1897 ent = __va(paddr);
1898
1899 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1900
1901 /* We have a local copy now, so release the entry. */
1902 ent->err_handle = 0;
1903 wmb();
1904
1905 put_cpu();
1906
1907 #ifdef CONFIG_PCI
1908 /* Check for the special PCI poke sequence. */
1909 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
1910 pci_poke_faulted = 1;
1911 regs->tpc += 4;
1912 regs->tnpc = regs->tpc + 4;
1913 return;
1914 }
1915 #endif
1916
1917 sun4v_log_error(regs, &local_copy, cpu,
1918 KERN_EMERG "NON-RESUMABLE ERROR",
1919 &sun4v_nonresum_oflow_cnt);
1920
1921 panic("Non-resumable error.");
1922 }
1923
1924 /* If we try to printk() we'll probably make matters worse, by trying
1925 * to retake locks this cpu already holds or causing more errors. So
1926 * just bump a counter, and we'll report these counter bumps above.
1927 */
1928 void sun4v_nonresum_overflow(struct pt_regs *regs)
1929 {
1930 /* XXX Actually even this can make not that much sense. Perhaps
1931 * XXX we should just pull the plug and panic directly from here?
1932 */
1933 atomic_inc(&sun4v_nonresum_oflow_cnt);
1934 }
1935
1936 unsigned long sun4v_err_itlb_vaddr;
1937 unsigned long sun4v_err_itlb_ctx;
1938 unsigned long sun4v_err_itlb_pte;
1939 unsigned long sun4v_err_itlb_error;
1940
1941 void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
1942 {
1943 if (tl > 1)
1944 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1945
1946 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
1947 regs->tpc, tl);
1948 printk(KERN_EMERG "SUN4V-ITLB: TPC<%pS>\n", (void *) regs->tpc);
1949 printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
1950 printk(KERN_EMERG "SUN4V-ITLB: O7<%pS>\n",
1951 (void *) regs->u_regs[UREG_I7]);
1952 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
1953 "pte[%lx] error[%lx]\n",
1954 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
1955 sun4v_err_itlb_pte, sun4v_err_itlb_error);
1956
1957 prom_halt();
1958 }
1959
1960 unsigned long sun4v_err_dtlb_vaddr;
1961 unsigned long sun4v_err_dtlb_ctx;
1962 unsigned long sun4v_err_dtlb_pte;
1963 unsigned long sun4v_err_dtlb_error;
1964
1965 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
1966 {
1967 if (tl > 1)
1968 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1969
1970 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
1971 regs->tpc, tl);
1972 printk(KERN_EMERG "SUN4V-DTLB: TPC<%pS>\n", (void *) regs->tpc);
1973 printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
1974 printk(KERN_EMERG "SUN4V-DTLB: O7<%pS>\n",
1975 (void *) regs->u_regs[UREG_I7]);
1976 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
1977 "pte[%lx] error[%lx]\n",
1978 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
1979 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
1980
1981 prom_halt();
1982 }
1983
1984 void hypervisor_tlbop_error(unsigned long err, unsigned long op)
1985 {
1986 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
1987 err, op);
1988 }
1989
1990 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
1991 {
1992 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
1993 err, op);
1994 }
1995
1996 void do_fpe_common(struct pt_regs *regs)
1997 {
1998 if (regs->tstate & TSTATE_PRIV) {
1999 regs->tpc = regs->tnpc;
2000 regs->tnpc += 4;
2001 } else {
2002 unsigned long fsr = current_thread_info()->xfsr[0];
2003 siginfo_t info;
2004
2005 if (test_thread_flag(TIF_32BIT)) {
2006 regs->tpc &= 0xffffffff;
2007 regs->tnpc &= 0xffffffff;
2008 }
2009 info.si_signo = SIGFPE;
2010 info.si_errno = 0;
2011 info.si_addr = (void __user *)regs->tpc;
2012 info.si_trapno = 0;
2013 info.si_code = __SI_FAULT;
2014 if ((fsr & 0x1c000) == (1 << 14)) {
2015 if (fsr & 0x10)
2016 info.si_code = FPE_FLTINV;
2017 else if (fsr & 0x08)
2018 info.si_code = FPE_FLTOVF;
2019 else if (fsr & 0x04)
2020 info.si_code = FPE_FLTUND;
2021 else if (fsr & 0x02)
2022 info.si_code = FPE_FLTDIV;
2023 else if (fsr & 0x01)
2024 info.si_code = FPE_FLTRES;
2025 }
2026 force_sig_info(SIGFPE, &info, current);
2027 }
2028 }
2029
2030 void do_fpieee(struct pt_regs *regs)
2031 {
2032 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2033 0, 0x24, SIGFPE) == NOTIFY_STOP)
2034 return;
2035
2036 do_fpe_common(regs);
2037 }
2038
2039 extern int do_mathemu(struct pt_regs *, struct fpustate *);
2040
2041 void do_fpother(struct pt_regs *regs)
2042 {
2043 struct fpustate *f = FPUSTATE;
2044 int ret = 0;
2045
2046 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2047 0, 0x25, SIGFPE) == NOTIFY_STOP)
2048 return;
2049
2050 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2051 case (2 << 14): /* unfinished_FPop */
2052 case (3 << 14): /* unimplemented_FPop */
2053 ret = do_mathemu(regs, f);
2054 break;
2055 }
2056 if (ret)
2057 return;
2058 do_fpe_common(regs);
2059 }
2060
2061 void do_tof(struct pt_regs *regs)
2062 {
2063 siginfo_t info;
2064
2065 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2066 0, 0x26, SIGEMT) == NOTIFY_STOP)
2067 return;
2068
2069 if (regs->tstate & TSTATE_PRIV)
2070 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2071 if (test_thread_flag(TIF_32BIT)) {
2072 regs->tpc &= 0xffffffff;
2073 regs->tnpc &= 0xffffffff;
2074 }
2075 info.si_signo = SIGEMT;
2076 info.si_errno = 0;
2077 info.si_code = EMT_TAGOVF;
2078 info.si_addr = (void __user *)regs->tpc;
2079 info.si_trapno = 0;
2080 force_sig_info(SIGEMT, &info, current);
2081 }
2082
2083 void do_div0(struct pt_regs *regs)
2084 {
2085 siginfo_t info;
2086
2087 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2088 0, 0x28, SIGFPE) == NOTIFY_STOP)
2089 return;
2090
2091 if (regs->tstate & TSTATE_PRIV)
2092 die_if_kernel("TL0: Kernel divide by zero.", regs);
2093 if (test_thread_flag(TIF_32BIT)) {
2094 regs->tpc &= 0xffffffff;
2095 regs->tnpc &= 0xffffffff;
2096 }
2097 info.si_signo = SIGFPE;
2098 info.si_errno = 0;
2099 info.si_code = FPE_INTDIV;
2100 info.si_addr = (void __user *)regs->tpc;
2101 info.si_trapno = 0;
2102 force_sig_info(SIGFPE, &info, current);
2103 }
2104
2105 static void instruction_dump(unsigned int *pc)
2106 {
2107 int i;
2108
2109 if ((((unsigned long) pc) & 3))
2110 return;
2111
2112 printk("Instruction DUMP:");
2113 for (i = -3; i < 6; i++)
2114 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2115 printk("\n");
2116 }
2117
2118 static void user_instruction_dump(unsigned int __user *pc)
2119 {
2120 int i;
2121 unsigned int buf[9];
2122
2123 if ((((unsigned long) pc) & 3))
2124 return;
2125
2126 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2127 return;
2128
2129 printk("Instruction DUMP:");
2130 for (i = 0; i < 9; i++)
2131 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2132 printk("\n");
2133 }
2134
2135 void show_stack(struct task_struct *tsk, unsigned long *_ksp)
2136 {
2137 unsigned long fp, thread_base, ksp;
2138 struct thread_info *tp;
2139 int count = 0;
2140
2141 ksp = (unsigned long) _ksp;
2142 if (!tsk)
2143 tsk = current;
2144 tp = task_thread_info(tsk);
2145 if (ksp == 0UL) {
2146 if (tsk == current)
2147 asm("mov %%fp, %0" : "=r" (ksp));
2148 else
2149 ksp = tp->ksp;
2150 }
2151 if (tp == current_thread_info())
2152 flushw_all();
2153
2154 fp = ksp + STACK_BIAS;
2155 thread_base = (unsigned long) tp;
2156
2157 printk("Call Trace:\n");
2158 do {
2159 struct sparc_stackf *sf;
2160 struct pt_regs *regs;
2161 unsigned long pc;
2162
2163 if (!kstack_valid(tp, fp))
2164 break;
2165 sf = (struct sparc_stackf *) fp;
2166 regs = (struct pt_regs *) (sf + 1);
2167
2168 if (kstack_is_trap_frame(tp, regs)) {
2169 if (!(regs->tstate & TSTATE_PRIV))
2170 break;
2171 pc = regs->tpc;
2172 fp = regs->u_regs[UREG_I6] + STACK_BIAS;
2173 } else {
2174 pc = sf->callers_pc;
2175 fp = (unsigned long)sf->fp + STACK_BIAS;
2176 }
2177
2178 printk(" [%016lx] %pS\n", pc, (void *) pc);
2179 } while (++count < 16);
2180 }
2181
2182 void dump_stack(void)
2183 {
2184 show_stack(current, NULL);
2185 }
2186
2187 EXPORT_SYMBOL(dump_stack);
2188
2189 static inline int is_kernel_stack(struct task_struct *task,
2190 struct reg_window *rw)
2191 {
2192 unsigned long rw_addr = (unsigned long) rw;
2193 unsigned long thread_base, thread_end;
2194
2195 if (rw_addr < PAGE_OFFSET) {
2196 if (task != &init_task)
2197 return 0;
2198 }
2199
2200 thread_base = (unsigned long) task_stack_page(task);
2201 thread_end = thread_base + sizeof(union thread_union);
2202 if (rw_addr >= thread_base &&
2203 rw_addr < thread_end &&
2204 !(rw_addr & 0x7UL))
2205 return 1;
2206
2207 return 0;
2208 }
2209
2210 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2211 {
2212 unsigned long fp = rw->ins[6];
2213
2214 if (!fp)
2215 return NULL;
2216
2217 return (struct reg_window *) (fp + STACK_BIAS);
2218 }
2219
2220 void die_if_kernel(char *str, struct pt_regs *regs)
2221 {
2222 static int die_counter;
2223 int count = 0;
2224
2225 /* Amuse the user. */
2226 printk(
2227 " \\|/ ____ \\|/\n"
2228 " \"@'/ .. \\`@\"\n"
2229 " /_| \\__/ |_\\\n"
2230 " \\__U_/\n");
2231
2232 printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
2233 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2234 __asm__ __volatile__("flushw");
2235 show_regs(regs);
2236 add_taint(TAINT_DIE);
2237 if (regs->tstate & TSTATE_PRIV) {
2238 struct reg_window *rw = (struct reg_window *)
2239 (regs->u_regs[UREG_FP] + STACK_BIAS);
2240
2241 /* Stop the back trace when we hit userland or we
2242 * find some badly aligned kernel stack.
2243 */
2244 while (rw &&
2245 count++ < 30&&
2246 is_kernel_stack(current, rw)) {
2247 printk("Caller[%016lx]: %pS\n", rw->ins[7],
2248 (void *) rw->ins[7]);
2249
2250 rw = kernel_stack_up(rw);
2251 }
2252 instruction_dump ((unsigned int *) regs->tpc);
2253 } else {
2254 if (test_thread_flag(TIF_32BIT)) {
2255 regs->tpc &= 0xffffffff;
2256 regs->tnpc &= 0xffffffff;
2257 }
2258 user_instruction_dump ((unsigned int __user *) regs->tpc);
2259 }
2260 if (regs->tstate & TSTATE_PRIV)
2261 do_exit(SIGKILL);
2262 do_exit(SIGSEGV);
2263 }
2264
2265 #define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2266 #define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2267
2268 extern int handle_popc(u32 insn, struct pt_regs *regs);
2269 extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
2270
2271 void do_illegal_instruction(struct pt_regs *regs)
2272 {
2273 unsigned long pc = regs->tpc;
2274 unsigned long tstate = regs->tstate;
2275 u32 insn;
2276 siginfo_t info;
2277
2278 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2279 0, 0x10, SIGILL) == NOTIFY_STOP)
2280 return;
2281
2282 if (tstate & TSTATE_PRIV)
2283 die_if_kernel("Kernel illegal instruction", regs);
2284 if (test_thread_flag(TIF_32BIT))
2285 pc = (u32)pc;
2286 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2287 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2288 if (handle_popc(insn, regs))
2289 return;
2290 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2291 if (handle_ldf_stq(insn, regs))
2292 return;
2293 } else if (tlb_type == hypervisor) {
2294 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2295 if (!vis_emul(regs, insn))
2296 return;
2297 } else {
2298 struct fpustate *f = FPUSTATE;
2299
2300 /* XXX maybe verify XFSR bits like
2301 * XXX do_fpother() does?
2302 */
2303 if (do_mathemu(regs, f))
2304 return;
2305 }
2306 }
2307 }
2308 info.si_signo = SIGILL;
2309 info.si_errno = 0;
2310 info.si_code = ILL_ILLOPC;
2311 info.si_addr = (void __user *)pc;
2312 info.si_trapno = 0;
2313 force_sig_info(SIGILL, &info, current);
2314 }
2315
2316 extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
2317
2318 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2319 {
2320 siginfo_t info;
2321
2322 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2323 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2324 return;
2325
2326 if (regs->tstate & TSTATE_PRIV) {
2327 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2328 return;
2329 }
2330 info.si_signo = SIGBUS;
2331 info.si_errno = 0;
2332 info.si_code = BUS_ADRALN;
2333 info.si_addr = (void __user *)sfar;
2334 info.si_trapno = 0;
2335 force_sig_info(SIGBUS, &info, current);
2336 }
2337
2338 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2339 {
2340 siginfo_t info;
2341
2342 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2343 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2344 return;
2345
2346 if (regs->tstate & TSTATE_PRIV) {
2347 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2348 return;
2349 }
2350 info.si_signo = SIGBUS;
2351 info.si_errno = 0;
2352 info.si_code = BUS_ADRALN;
2353 info.si_addr = (void __user *) addr;
2354 info.si_trapno = 0;
2355 force_sig_info(SIGBUS, &info, current);
2356 }
2357
2358 void do_privop(struct pt_regs *regs)
2359 {
2360 siginfo_t info;
2361
2362 if (notify_die(DIE_TRAP, "privileged operation", regs,
2363 0, 0x11, SIGILL) == NOTIFY_STOP)
2364 return;
2365
2366 if (test_thread_flag(TIF_32BIT)) {
2367 regs->tpc &= 0xffffffff;
2368 regs->tnpc &= 0xffffffff;
2369 }
2370 info.si_signo = SIGILL;
2371 info.si_errno = 0;
2372 info.si_code = ILL_PRVOPC;
2373 info.si_addr = (void __user *)regs->tpc;
2374 info.si_trapno = 0;
2375 force_sig_info(SIGILL, &info, current);
2376 }
2377
2378 void do_privact(struct pt_regs *regs)
2379 {
2380 do_privop(regs);
2381 }
2382
2383 /* Trap level 1 stuff or other traps we should never see... */
2384 void do_cee(struct pt_regs *regs)
2385 {
2386 die_if_kernel("TL0: Cache Error Exception", regs);
2387 }
2388
2389 void do_cee_tl1(struct pt_regs *regs)
2390 {
2391 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2392 die_if_kernel("TL1: Cache Error Exception", regs);
2393 }
2394
2395 void do_dae_tl1(struct pt_regs *regs)
2396 {
2397 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2398 die_if_kernel("TL1: Data Access Exception", regs);
2399 }
2400
2401 void do_iae_tl1(struct pt_regs *regs)
2402 {
2403 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2404 die_if_kernel("TL1: Instruction Access Exception", regs);
2405 }
2406
2407 void do_div0_tl1(struct pt_regs *regs)
2408 {
2409 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2410 die_if_kernel("TL1: DIV0 Exception", regs);
2411 }
2412
2413 void do_fpdis_tl1(struct pt_regs *regs)
2414 {
2415 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2416 die_if_kernel("TL1: FPU Disabled", regs);
2417 }
2418
2419 void do_fpieee_tl1(struct pt_regs *regs)
2420 {
2421 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2422 die_if_kernel("TL1: FPU IEEE Exception", regs);
2423 }
2424
2425 void do_fpother_tl1(struct pt_regs *regs)
2426 {
2427 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2428 die_if_kernel("TL1: FPU Other Exception", regs);
2429 }
2430
2431 void do_ill_tl1(struct pt_regs *regs)
2432 {
2433 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2434 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2435 }
2436
2437 void do_irq_tl1(struct pt_regs *regs)
2438 {
2439 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2440 die_if_kernel("TL1: IRQ Exception", regs);
2441 }
2442
2443 void do_lddfmna_tl1(struct pt_regs *regs)
2444 {
2445 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2446 die_if_kernel("TL1: LDDF Exception", regs);
2447 }
2448
2449 void do_stdfmna_tl1(struct pt_regs *regs)
2450 {
2451 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2452 die_if_kernel("TL1: STDF Exception", regs);
2453 }
2454
2455 void do_paw(struct pt_regs *regs)
2456 {
2457 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2458 }
2459
2460 void do_paw_tl1(struct pt_regs *regs)
2461 {
2462 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2463 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2464 }
2465
2466 void do_vaw(struct pt_regs *regs)
2467 {
2468 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2469 }
2470
2471 void do_vaw_tl1(struct pt_regs *regs)
2472 {
2473 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2474 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2475 }
2476
2477 void do_tof_tl1(struct pt_regs *regs)
2478 {
2479 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2480 die_if_kernel("TL1: Tag Overflow Exception", regs);
2481 }
2482
2483 void do_getpsr(struct pt_regs *regs)
2484 {
2485 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2486 regs->tpc = regs->tnpc;
2487 regs->tnpc += 4;
2488 if (test_thread_flag(TIF_32BIT)) {
2489 regs->tpc &= 0xffffffff;
2490 regs->tnpc &= 0xffffffff;
2491 }
2492 }
2493
2494 struct trap_per_cpu trap_block[NR_CPUS];
2495
2496 /* This can get invoked before sched_init() so play it super safe
2497 * and use hard_smp_processor_id().
2498 */
2499 void notrace init_cur_cpu_trap(struct thread_info *t)
2500 {
2501 int cpu = hard_smp_processor_id();
2502 struct trap_per_cpu *p = &trap_block[cpu];
2503
2504 p->thread = t;
2505 p->pgd_paddr = 0;
2506 }
2507
2508 extern void thread_info_offsets_are_bolixed_dave(void);
2509 extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2510 extern void tsb_config_offsets_are_bolixed_dave(void);
2511
2512 /* Only invoked on boot processor. */
2513 void __init trap_init(void)
2514 {
2515 /* Compile time sanity check. */
2516 if (TI_TASK != offsetof(struct thread_info, task) ||
2517 TI_FLAGS != offsetof(struct thread_info, flags) ||
2518 TI_CPU != offsetof(struct thread_info, cpu) ||
2519 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2520 TI_KSP != offsetof(struct thread_info, ksp) ||
2521 TI_FAULT_ADDR != offsetof(struct thread_info, fault_address) ||
2522 TI_KREGS != offsetof(struct thread_info, kregs) ||
2523 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2524 TI_EXEC_DOMAIN != offsetof(struct thread_info, exec_domain) ||
2525 TI_REG_WINDOW != offsetof(struct thread_info, reg_window) ||
2526 TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) ||
2527 TI_GSR != offsetof(struct thread_info, gsr) ||
2528 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2529 TI_USER_CNTD0 != offsetof(struct thread_info, user_cntd0) ||
2530 TI_USER_CNTD1 != offsetof(struct thread_info, user_cntd1) ||
2531 TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) ||
2532 TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) ||
2533 TI_PCR != offsetof(struct thread_info, pcr_reg) ||
2534 TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) ||
2535 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2536 TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) ||
2537 TI_RESTART_BLOCK != offsetof(struct thread_info, restart_block) ||
2538 TI_KUNA_REGS != offsetof(struct thread_info, kern_una_regs) ||
2539 TI_KUNA_INSN != offsetof(struct thread_info, kern_una_insn) ||
2540 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2541 (TI_FPREGS & (64 - 1)))
2542 thread_info_offsets_are_bolixed_dave();
2543
2544 if (TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, thread) ||
2545 (TRAP_PER_CPU_PGD_PADDR !=
2546 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2547 (TRAP_PER_CPU_CPU_MONDO_PA !=
2548 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2549 (TRAP_PER_CPU_DEV_MONDO_PA !=
2550 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2551 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2552 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2553 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2554 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2555 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2556 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2557 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2558 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2559 (TRAP_PER_CPU_FAULT_INFO !=
2560 offsetof(struct trap_per_cpu, fault_info)) ||
2561 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2562 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2563 (TRAP_PER_CPU_CPU_LIST_PA !=
2564 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2565 (TRAP_PER_CPU_TSB_HUGE !=
2566 offsetof(struct trap_per_cpu, tsb_huge)) ||
2567 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2568 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2569 (TRAP_PER_CPU_IRQ_WORKLIST_PA !=
2570 offsetof(struct trap_per_cpu, irq_worklist_pa)) ||
2571 (TRAP_PER_CPU_CPU_MONDO_QMASK !=
2572 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) ||
2573 (TRAP_PER_CPU_DEV_MONDO_QMASK !=
2574 offsetof(struct trap_per_cpu, dev_mondo_qmask)) ||
2575 (TRAP_PER_CPU_RESUM_QMASK !=
2576 offsetof(struct trap_per_cpu, resum_qmask)) ||
2577 (TRAP_PER_CPU_NONRESUM_QMASK !=
2578 offsetof(struct trap_per_cpu, nonresum_qmask)))
2579 trap_per_cpu_offsets_are_bolixed_dave();
2580
2581 if ((TSB_CONFIG_TSB !=
2582 offsetof(struct tsb_config, tsb)) ||
2583 (TSB_CONFIG_RSS_LIMIT !=
2584 offsetof(struct tsb_config, tsb_rss_limit)) ||
2585 (TSB_CONFIG_NENTRIES !=
2586 offsetof(struct tsb_config, tsb_nentries)) ||
2587 (TSB_CONFIG_REG_VAL !=
2588 offsetof(struct tsb_config, tsb_reg_val)) ||
2589 (TSB_CONFIG_MAP_VADDR !=
2590 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2591 (TSB_CONFIG_MAP_PTE !=
2592 offsetof(struct tsb_config, tsb_map_pte)))
2593 tsb_config_offsets_are_bolixed_dave();
2594
2595 /* Attach to the address space of init_task. On SMP we
2596 * do this in smp.c:smp_callin for other cpus.
2597 */
2598 atomic_inc(&init_mm.mm_count);
2599 current->active_mm = &init_mm;
2600 }
Linux kernel - Deliverables
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