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1/* arch/sparc64/kernel/traps.c
2 *
3 * Copyright (C) 1995,1997,2008,2009 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/gfp.h>
22
23#include <asm/smp.h>
24#include <asm/delay.h>
25#include <asm/ptrace.h>
26#include <asm/oplib.h>
27#include <asm/page.h>
28#include <asm/pgtable.h>
29#include <asm/unistd.h>
30#include <asm/uaccess.h>
31#include <asm/fpumacro.h>
32#include <asm/lsu.h>
33#include <asm/dcu.h>
34#include <asm/estate.h>
35#include <asm/chafsr.h>
36#include <asm/sfafsr.h>
37#include <asm/psrcompat.h>
38#include <asm/processor.h>
39#include <asm/timer.h>
40#include <asm/head.h>
41#include <asm/prom.h>
42#include <asm/memctrl.h>
43#include <asm/cacheflush.h>
44
45#include "entry.h"
46#include "kstack.h"
47
48/* When an irrecoverable trap occurs at tl > 0, the trap entry
49 * code logs the trap state registers at every level in the trap
50 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
51 * is as follows:
52 */
53struct tl1_traplog {
54 struct {
55 unsigned long tstate;
56 unsigned long tpc;
57 unsigned long tnpc;
58 unsigned long tt;
59 } trapstack[4];
60 unsigned long tl;
61};
62
63static void dump_tl1_traplog(struct tl1_traplog *p)
64{
65 int i, limit;
66
67 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
68 "dumping track stack.\n", p->tl);
69
70 limit = (tlb_type == hypervisor) ? 2 : 4;
71 for (i = 0; i < limit; i++) {
72 printk(KERN_EMERG
73 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
74 "TNPC[%016lx] TT[%lx]\n",
75 i + 1,
76 p->trapstack[i].tstate, p->trapstack[i].tpc,
77 p->trapstack[i].tnpc, p->trapstack[i].tt);
78 printk("TRAPLOG: TPC<%pS>\n", (void *) p->trapstack[i].tpc);
79 }
80}
81
82void bad_trap(struct pt_regs *regs, long lvl)
83{
84 char buffer[32];
85 siginfo_t info;
86
87 if (notify_die(DIE_TRAP, "bad trap", regs,
88 0, lvl, SIGTRAP) == NOTIFY_STOP)
89 return;
90
91 if (lvl < 0x100) {
92 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
93 die_if_kernel(buffer, regs);
94 }
95
96 lvl -= 0x100;
97 if (regs->tstate & TSTATE_PRIV) {
98 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
99 die_if_kernel(buffer, regs);
100 }
101 if (test_thread_flag(TIF_32BIT)) {
102 regs->tpc &= 0xffffffff;
103 regs->tnpc &= 0xffffffff;
104 }
105 info.si_signo = SIGILL;
106 info.si_errno = 0;
107 info.si_code = ILL_ILLTRP;
108 info.si_addr = (void __user *)regs->tpc;
109 info.si_trapno = lvl;
110 force_sig_info(SIGILL, &info, current);
111}
112
113void bad_trap_tl1(struct pt_regs *regs, long lvl)
114{
115 char buffer[32];
116
117 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
118 0, lvl, SIGTRAP) == NOTIFY_STOP)
119 return;
120
121 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
122
123 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
124 die_if_kernel (buffer, regs);
125}
126
127#ifdef CONFIG_DEBUG_BUGVERBOSE
128void do_BUG(const char *file, int line)
129{
130 bust_spinlocks(1);
131 printk("kernel BUG at %s:%d!\n", file, line);
132}
133EXPORT_SYMBOL(do_BUG);
134#endif
135
136static DEFINE_SPINLOCK(dimm_handler_lock);
137static dimm_printer_t dimm_handler;
138
139static int sprintf_dimm(int synd_code, unsigned long paddr, char *buf, int buflen)
140{
141 unsigned long flags;
142 int ret = -ENODEV;
143
144 spin_lock_irqsave(&dimm_handler_lock, flags);
145 if (dimm_handler) {
146 ret = dimm_handler(synd_code, paddr, buf, buflen);
147 } else if (tlb_type == spitfire) {
148 if (prom_getunumber(synd_code, paddr, buf, buflen) == -1)
149 ret = -EINVAL;
150 else
151 ret = 0;
152 } else
153 ret = -ENODEV;
154 spin_unlock_irqrestore(&dimm_handler_lock, flags);
155
156 return ret;
157}
158
159int register_dimm_printer(dimm_printer_t func)
160{
161 unsigned long flags;
162 int ret = 0;
163
164 spin_lock_irqsave(&dimm_handler_lock, flags);
165 if (!dimm_handler)
166 dimm_handler = func;
167 else
168 ret = -EEXIST;
169 spin_unlock_irqrestore(&dimm_handler_lock, flags);
170
171 return ret;
172}
173EXPORT_SYMBOL_GPL(register_dimm_printer);
174
175void unregister_dimm_printer(dimm_printer_t func)
176{
177 unsigned long flags;
178
179 spin_lock_irqsave(&dimm_handler_lock, flags);
180 if (dimm_handler == func)
181 dimm_handler = NULL;
182 spin_unlock_irqrestore(&dimm_handler_lock, flags);
183}
184EXPORT_SYMBOL_GPL(unregister_dimm_printer);
185
186void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
187{
188 siginfo_t info;
189
190 if (notify_die(DIE_TRAP, "instruction access exception", regs,
191 0, 0x8, SIGTRAP) == NOTIFY_STOP)
192 return;
193
194 if (regs->tstate & TSTATE_PRIV) {
195 printk("spitfire_insn_access_exception: SFSR[%016lx] "
196 "SFAR[%016lx], going.\n", sfsr, sfar);
197 die_if_kernel("Iax", regs);
198 }
199 if (test_thread_flag(TIF_32BIT)) {
200 regs->tpc &= 0xffffffff;
201 regs->tnpc &= 0xffffffff;
202 }
203 info.si_signo = SIGSEGV;
204 info.si_errno = 0;
205 info.si_code = SEGV_MAPERR;
206 info.si_addr = (void __user *)regs->tpc;
207 info.si_trapno = 0;
208 force_sig_info(SIGSEGV, &info, current);
209}
210
211void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
212{
213 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
214 0, 0x8, SIGTRAP) == NOTIFY_STOP)
215 return;
216
217 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
218 spitfire_insn_access_exception(regs, sfsr, sfar);
219}
220
221void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
222{
223 unsigned short type = (type_ctx >> 16);
224 unsigned short ctx = (type_ctx & 0xffff);
225 siginfo_t info;
226
227 if (notify_die(DIE_TRAP, "instruction access exception", regs,
228 0, 0x8, SIGTRAP) == NOTIFY_STOP)
229 return;
230
231 if (regs->tstate & TSTATE_PRIV) {
232 printk("sun4v_insn_access_exception: ADDR[%016lx] "
233 "CTX[%04x] TYPE[%04x], going.\n",
234 addr, ctx, type);
235 die_if_kernel("Iax", regs);
236 }
237
238 if (test_thread_flag(TIF_32BIT)) {
239 regs->tpc &= 0xffffffff;
240 regs->tnpc &= 0xffffffff;
241 }
242 info.si_signo = SIGSEGV;
243 info.si_errno = 0;
244 info.si_code = SEGV_MAPERR;
245 info.si_addr = (void __user *) addr;
246 info.si_trapno = 0;
247 force_sig_info(SIGSEGV, &info, current);
248}
249
250void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
251{
252 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
253 0, 0x8, SIGTRAP) == NOTIFY_STOP)
254 return;
255
256 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
257 sun4v_insn_access_exception(regs, addr, type_ctx);
258}
259
260void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
261{
262 siginfo_t info;
263
264 if (notify_die(DIE_TRAP, "data access exception", regs,
265 0, 0x30, SIGTRAP) == NOTIFY_STOP)
266 return;
267
268 if (regs->tstate & TSTATE_PRIV) {
269 /* Test if this comes from uaccess places. */
270 const struct exception_table_entry *entry;
271
272 entry = search_exception_tables(regs->tpc);
273 if (entry) {
274 /* Ouch, somebody is trying VM hole tricks on us... */
275#ifdef DEBUG_EXCEPTIONS
276 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
277 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
278 regs->tpc, entry->fixup);
279#endif
280 regs->tpc = entry->fixup;
281 regs->tnpc = regs->tpc + 4;
282 return;
283 }
284 /* Shit... */
285 printk("spitfire_data_access_exception: SFSR[%016lx] "
286 "SFAR[%016lx], going.\n", sfsr, sfar);
287 die_if_kernel("Dax", regs);
288 }
289
290 info.si_signo = SIGSEGV;
291 info.si_errno = 0;
292 info.si_code = SEGV_MAPERR;
293 info.si_addr = (void __user *)sfar;
294 info.si_trapno = 0;
295 force_sig_info(SIGSEGV, &info, current);
296}
297
298void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
299{
300 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
301 0, 0x30, SIGTRAP) == NOTIFY_STOP)
302 return;
303
304 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
305 spitfire_data_access_exception(regs, sfsr, sfar);
306}
307
308void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
309{
310 unsigned short type = (type_ctx >> 16);
311 unsigned short ctx = (type_ctx & 0xffff);
312 siginfo_t info;
313
314 if (notify_die(DIE_TRAP, "data access exception", regs,
315 0, 0x8, SIGTRAP) == NOTIFY_STOP)
316 return;
317
318 if (regs->tstate & TSTATE_PRIV) {
319 /* Test if this comes from uaccess places. */
320 const struct exception_table_entry *entry;
321
322 entry = search_exception_tables(regs->tpc);
323 if (entry) {
324 /* Ouch, somebody is trying VM hole tricks on us... */
325#ifdef DEBUG_EXCEPTIONS
326 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
327 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
328 regs->tpc, entry->fixup);
329#endif
330 regs->tpc = entry->fixup;
331 regs->tnpc = regs->tpc + 4;
332 return;
333 }
334 printk("sun4v_data_access_exception: ADDR[%016lx] "
335 "CTX[%04x] TYPE[%04x], going.\n",
336 addr, ctx, type);
337 die_if_kernel("Dax", regs);
338 }
339
340 if (test_thread_flag(TIF_32BIT)) {
341 regs->tpc &= 0xffffffff;
342 regs->tnpc &= 0xffffffff;
343 }
344 info.si_signo = SIGSEGV;
345 info.si_errno = 0;
346 info.si_code = SEGV_MAPERR;
347 info.si_addr = (void __user *) addr;
348 info.si_trapno = 0;
349 force_sig_info(SIGSEGV, &info, current);
350}
351
352void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
353{
354 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
355 0, 0x8, SIGTRAP) == NOTIFY_STOP)
356 return;
357
358 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
359 sun4v_data_access_exception(regs, addr, type_ctx);
360}
361
362#ifdef CONFIG_PCI
363#include "pci_impl.h"
364#endif
365
366/* When access exceptions happen, we must do this. */
367static void spitfire_clean_and_reenable_l1_caches(void)
368{
369 unsigned long va;
370
371 if (tlb_type != spitfire)
372 BUG();
373
374 /* Clean 'em. */
375 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
376 spitfire_put_icache_tag(va, 0x0);
377 spitfire_put_dcache_tag(va, 0x0);
378 }
379
380 /* Re-enable in LSU. */
381 __asm__ __volatile__("flush %%g6\n\t"
382 "membar #Sync\n\t"
383 "stxa %0, [%%g0] %1\n\t"
384 "membar #Sync"
385 : /* no outputs */
386 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
387 LSU_CONTROL_IM | LSU_CONTROL_DM),
388 "i" (ASI_LSU_CONTROL)
389 : "memory");
390}
391
392static void spitfire_enable_estate_errors(void)
393{
394 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
395 "membar #Sync"
396 : /* no outputs */
397 : "r" (ESTATE_ERR_ALL),
398 "i" (ASI_ESTATE_ERROR_EN));
399}
400
401static char ecc_syndrome_table[] = {
402 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
403 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
404 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
405 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
406 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
407 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
408 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
409 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
410 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
411 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
412 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
413 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
414 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
415 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
416 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
417 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
418 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
419 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
420 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
421 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
422 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
423 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
424 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
425 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
426 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
427 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
428 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
429 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
430 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
431 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
432 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
433 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
434};
435
436static char *syndrome_unknown = "<Unknown>";
437
438static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
439{
440 unsigned short scode;
441 char memmod_str[64], *p;
442
443 if (udbl & bit) {
444 scode = ecc_syndrome_table[udbl & 0xff];
445 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
446 p = syndrome_unknown;
447 else
448 p = memmod_str;
449 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
450 "Memory Module \"%s\"\n",
451 smp_processor_id(), scode, p);
452 }
453
454 if (udbh & bit) {
455 scode = ecc_syndrome_table[udbh & 0xff];
456 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
457 p = syndrome_unknown;
458 else
459 p = memmod_str;
460 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
461 "Memory Module \"%s\"\n",
462 smp_processor_id(), scode, p);
463 }
464
465}
466
467static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
468{
469
470 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
471 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
472 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
473
474 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
475
476 /* We always log it, even if someone is listening for this
477 * trap.
478 */
479 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
480 0, TRAP_TYPE_CEE, SIGTRAP);
481
482 /* The Correctable ECC Error trap does not disable I/D caches. So
483 * we only have to restore the ESTATE Error Enable register.
484 */
485 spitfire_enable_estate_errors();
486}
487
488static 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)
489{
490 siginfo_t info;
491
492 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
493 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
494 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
495
496 /* XXX add more human friendly logging of the error status
497 * XXX as is implemented for cheetah
498 */
499
500 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
501
502 /* We always log it, even if someone is listening for this
503 * trap.
504 */
505 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
506 0, tt, SIGTRAP);
507
508 if (regs->tstate & TSTATE_PRIV) {
509 if (tl1)
510 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
511 die_if_kernel("UE", regs);
512 }
513
514 /* XXX need more intelligent processing here, such as is implemented
515 * XXX for cheetah errors, in fact if the E-cache still holds the
516 * XXX line with bad parity this will loop
517 */
518
519 spitfire_clean_and_reenable_l1_caches();
520 spitfire_enable_estate_errors();
521
522 if (test_thread_flag(TIF_32BIT)) {
523 regs->tpc &= 0xffffffff;
524 regs->tnpc &= 0xffffffff;
525 }
526 info.si_signo = SIGBUS;
527 info.si_errno = 0;
528 info.si_code = BUS_OBJERR;
529 info.si_addr = (void *)0;
530 info.si_trapno = 0;
531 force_sig_info(SIGBUS, &info, current);
532}
533
534void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
535{
536 unsigned long afsr, tt, udbh, udbl;
537 int tl1;
538
539 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
540 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
541 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
542 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
543 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
544
545#ifdef CONFIG_PCI
546 if (tt == TRAP_TYPE_DAE &&
547 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
548 spitfire_clean_and_reenable_l1_caches();
549 spitfire_enable_estate_errors();
550
551 pci_poke_faulted = 1;
552 regs->tnpc = regs->tpc + 4;
553 return;
554 }
555#endif
556
557 if (afsr & SFAFSR_UE)
558 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
559
560 if (tt == TRAP_TYPE_CEE) {
561 /* Handle the case where we took a CEE trap, but ACK'd
562 * only the UE state in the UDB error registers.
563 */
564 if (afsr & SFAFSR_UE) {
565 if (udbh & UDBE_CE) {
566 __asm__ __volatile__(
567 "stxa %0, [%1] %2\n\t"
568 "membar #Sync"
569 : /* no outputs */
570 : "r" (udbh & UDBE_CE),
571 "r" (0x0), "i" (ASI_UDB_ERROR_W));
572 }
573 if (udbl & UDBE_CE) {
574 __asm__ __volatile__(
575 "stxa %0, [%1] %2\n\t"
576 "membar #Sync"
577 : /* no outputs */
578 : "r" (udbl & UDBE_CE),
579 "r" (0x18), "i" (ASI_UDB_ERROR_W));
580 }
581 }
582
583 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
584 }
585}
586
587int cheetah_pcache_forced_on;
588
589void cheetah_enable_pcache(void)
590{
591 unsigned long dcr;
592
593 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
594 smp_processor_id());
595
596 __asm__ __volatile__("ldxa [%%g0] %1, %0"
597 : "=r" (dcr)
598 : "i" (ASI_DCU_CONTROL_REG));
599 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
600 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
601 "membar #Sync"
602 : /* no outputs */
603 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
604}
605
606/* Cheetah error trap handling. */
607static unsigned long ecache_flush_physbase;
608static unsigned long ecache_flush_linesize;
609static unsigned long ecache_flush_size;
610
611/* This table is ordered in priority of errors and matches the
612 * AFAR overwrite policy as well.
613 */
614
615struct afsr_error_table {
616 unsigned long mask;
617 const char *name;
618};
619
620static const char CHAFSR_PERR_msg[] =
621 "System interface protocol error";
622static const char CHAFSR_IERR_msg[] =
623 "Internal processor error";
624static const char CHAFSR_ISAP_msg[] =
625 "System request parity error on incoming address";
626static const char CHAFSR_UCU_msg[] =
627 "Uncorrectable E-cache ECC error for ifetch/data";
628static const char CHAFSR_UCC_msg[] =
629 "SW Correctable E-cache ECC error for ifetch/data";
630static const char CHAFSR_UE_msg[] =
631 "Uncorrectable system bus data ECC error for read";
632static const char CHAFSR_EDU_msg[] =
633 "Uncorrectable E-cache ECC error for stmerge/blkld";
634static const char CHAFSR_EMU_msg[] =
635 "Uncorrectable system bus MTAG error";
636static const char CHAFSR_WDU_msg[] =
637 "Uncorrectable E-cache ECC error for writeback";
638static const char CHAFSR_CPU_msg[] =
639 "Uncorrectable ECC error for copyout";
640static const char CHAFSR_CE_msg[] =
641 "HW corrected system bus data ECC error for read";
642static const char CHAFSR_EDC_msg[] =
643 "HW corrected E-cache ECC error for stmerge/blkld";
644static const char CHAFSR_EMC_msg[] =
645 "HW corrected system bus MTAG ECC error";
646static const char CHAFSR_WDC_msg[] =
647 "HW corrected E-cache ECC error for writeback";
648static const char CHAFSR_CPC_msg[] =
649 "HW corrected ECC error for copyout";
650static const char CHAFSR_TO_msg[] =
651 "Unmapped error from system bus";
652static const char CHAFSR_BERR_msg[] =
653 "Bus error response from system bus";
654static const char CHAFSR_IVC_msg[] =
655 "HW corrected system bus data ECC error for ivec read";
656static const char CHAFSR_IVU_msg[] =
657 "Uncorrectable system bus data ECC error for ivec read";
658static struct afsr_error_table __cheetah_error_table[] = {
659 { CHAFSR_PERR, CHAFSR_PERR_msg },
660 { CHAFSR_IERR, CHAFSR_IERR_msg },
661 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
662 { CHAFSR_UCU, CHAFSR_UCU_msg },
663 { CHAFSR_UCC, CHAFSR_UCC_msg },
664 { CHAFSR_UE, CHAFSR_UE_msg },
665 { CHAFSR_EDU, CHAFSR_EDU_msg },
666 { CHAFSR_EMU, CHAFSR_EMU_msg },
667 { CHAFSR_WDU, CHAFSR_WDU_msg },
668 { CHAFSR_CPU, CHAFSR_CPU_msg },
669 { CHAFSR_CE, CHAFSR_CE_msg },
670 { CHAFSR_EDC, CHAFSR_EDC_msg },
671 { CHAFSR_EMC, CHAFSR_EMC_msg },
672 { CHAFSR_WDC, CHAFSR_WDC_msg },
673 { CHAFSR_CPC, CHAFSR_CPC_msg },
674 { CHAFSR_TO, CHAFSR_TO_msg },
675 { CHAFSR_BERR, CHAFSR_BERR_msg },
676 /* These two do not update the AFAR. */
677 { CHAFSR_IVC, CHAFSR_IVC_msg },
678 { CHAFSR_IVU, CHAFSR_IVU_msg },
679 { 0, NULL },
680};
681static const char CHPAFSR_DTO_msg[] =
682 "System bus unmapped error for prefetch/storequeue-read";
683static const char CHPAFSR_DBERR_msg[] =
684 "System bus error for prefetch/storequeue-read";
685static const char CHPAFSR_THCE_msg[] =
686 "Hardware corrected E-cache Tag ECC error";
687static const char CHPAFSR_TSCE_msg[] =
688 "SW handled correctable E-cache Tag ECC error";
689static const char CHPAFSR_TUE_msg[] =
690 "Uncorrectable E-cache Tag ECC error";
691static const char CHPAFSR_DUE_msg[] =
692 "System bus uncorrectable data ECC error due to prefetch/store-fill";
693static struct afsr_error_table __cheetah_plus_error_table[] = {
694 { CHAFSR_PERR, CHAFSR_PERR_msg },
695 { CHAFSR_IERR, CHAFSR_IERR_msg },
696 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
697 { CHAFSR_UCU, CHAFSR_UCU_msg },
698 { CHAFSR_UCC, CHAFSR_UCC_msg },
699 { CHAFSR_UE, CHAFSR_UE_msg },
700 { CHAFSR_EDU, CHAFSR_EDU_msg },
701 { CHAFSR_EMU, CHAFSR_EMU_msg },
702 { CHAFSR_WDU, CHAFSR_WDU_msg },
703 { CHAFSR_CPU, CHAFSR_CPU_msg },
704 { CHAFSR_CE, CHAFSR_CE_msg },
705 { CHAFSR_EDC, CHAFSR_EDC_msg },
706 { CHAFSR_EMC, CHAFSR_EMC_msg },
707 { CHAFSR_WDC, CHAFSR_WDC_msg },
708 { CHAFSR_CPC, CHAFSR_CPC_msg },
709 { CHAFSR_TO, CHAFSR_TO_msg },
710 { CHAFSR_BERR, CHAFSR_BERR_msg },
711 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
712 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
713 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
714 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
715 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
716 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
717 /* These two do not update the AFAR. */
718 { CHAFSR_IVC, CHAFSR_IVC_msg },
719 { CHAFSR_IVU, CHAFSR_IVU_msg },
720 { 0, NULL },
721};
722static const char JPAFSR_JETO_msg[] =
723 "System interface protocol error, hw timeout caused";
724static const char JPAFSR_SCE_msg[] =
725 "Parity error on system snoop results";
726static const char JPAFSR_JEIC_msg[] =
727 "System interface protocol error, illegal command detected";
728static const char JPAFSR_JEIT_msg[] =
729 "System interface protocol error, illegal ADTYPE detected";
730static const char JPAFSR_OM_msg[] =
731 "Out of range memory error has occurred";
732static const char JPAFSR_ETP_msg[] =
733 "Parity error on L2 cache tag SRAM";
734static const char JPAFSR_UMS_msg[] =
735 "Error due to unsupported store";
736static const char JPAFSR_RUE_msg[] =
737 "Uncorrectable ECC error from remote cache/memory";
738static const char JPAFSR_RCE_msg[] =
739 "Correctable ECC error from remote cache/memory";
740static const char JPAFSR_BP_msg[] =
741 "JBUS parity error on returned read data";
742static const char JPAFSR_WBP_msg[] =
743 "JBUS parity error on data for writeback or block store";
744static const char JPAFSR_FRC_msg[] =
745 "Foreign read to DRAM incurring correctable ECC error";
746static const char JPAFSR_FRU_msg[] =
747 "Foreign read to DRAM incurring uncorrectable ECC error";
748static struct afsr_error_table __jalapeno_error_table[] = {
749 { JPAFSR_JETO, JPAFSR_JETO_msg },
750 { JPAFSR_SCE, JPAFSR_SCE_msg },
751 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
752 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
753 { CHAFSR_PERR, CHAFSR_PERR_msg },
754 { CHAFSR_IERR, CHAFSR_IERR_msg },
755 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
756 { CHAFSR_UCU, CHAFSR_UCU_msg },
757 { CHAFSR_UCC, CHAFSR_UCC_msg },
758 { CHAFSR_UE, CHAFSR_UE_msg },
759 { CHAFSR_EDU, CHAFSR_EDU_msg },
760 { JPAFSR_OM, JPAFSR_OM_msg },
761 { CHAFSR_WDU, CHAFSR_WDU_msg },
762 { CHAFSR_CPU, CHAFSR_CPU_msg },
763 { CHAFSR_CE, CHAFSR_CE_msg },
764 { CHAFSR_EDC, CHAFSR_EDC_msg },
765 { JPAFSR_ETP, JPAFSR_ETP_msg },
766 { CHAFSR_WDC, CHAFSR_WDC_msg },
767 { CHAFSR_CPC, CHAFSR_CPC_msg },
768 { CHAFSR_TO, CHAFSR_TO_msg },
769 { CHAFSR_BERR, CHAFSR_BERR_msg },
770 { JPAFSR_UMS, JPAFSR_UMS_msg },
771 { JPAFSR_RUE, JPAFSR_RUE_msg },
772 { JPAFSR_RCE, JPAFSR_RCE_msg },
773 { JPAFSR_BP, JPAFSR_BP_msg },
774 { JPAFSR_WBP, JPAFSR_WBP_msg },
775 { JPAFSR_FRC, JPAFSR_FRC_msg },
776 { JPAFSR_FRU, JPAFSR_FRU_msg },
777 /* These two do not update the AFAR. */
778 { CHAFSR_IVU, CHAFSR_IVU_msg },
779 { 0, NULL },
780};
781static struct afsr_error_table *cheetah_error_table;
782static unsigned long cheetah_afsr_errors;
783
784struct cheetah_err_info *cheetah_error_log;
785
786static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
787{
788 struct cheetah_err_info *p;
789 int cpu = smp_processor_id();
790
791 if (!cheetah_error_log)
792 return NULL;
793
794 p = cheetah_error_log + (cpu * 2);
795 if ((afsr & CHAFSR_TL1) != 0UL)
796 p++;
797
798 return p;
799}
800
801extern unsigned int tl0_icpe[], tl1_icpe[];
802extern unsigned int tl0_dcpe[], tl1_dcpe[];
803extern unsigned int tl0_fecc[], tl1_fecc[];
804extern unsigned int tl0_cee[], tl1_cee[];
805extern unsigned int tl0_iae[], tl1_iae[];
806extern unsigned int tl0_dae[], tl1_dae[];
807extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
808extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
809extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
810extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
811extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
812
813void __init cheetah_ecache_flush_init(void)
814{
815 unsigned long largest_size, smallest_linesize, order, ver;
816 int i, sz;
817
818 /* Scan all cpu device tree nodes, note two values:
819 * 1) largest E-cache size
820 * 2) smallest E-cache line size
821 */
822 largest_size = 0UL;
823 smallest_linesize = ~0UL;
824
825 for (i = 0; i < NR_CPUS; i++) {
826 unsigned long val;
827
828 val = cpu_data(i).ecache_size;
829 if (!val)
830 continue;
831
832 if (val > largest_size)
833 largest_size = val;
834
835 val = cpu_data(i).ecache_line_size;
836 if (val < smallest_linesize)
837 smallest_linesize = val;
838
839 }
840
841 if (largest_size == 0UL || smallest_linesize == ~0UL) {
842 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
843 "parameters.\n");
844 prom_halt();
845 }
846
847 ecache_flush_size = (2 * largest_size);
848 ecache_flush_linesize = smallest_linesize;
849
850 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
851
852 if (ecache_flush_physbase == ~0UL) {
853 prom_printf("cheetah_ecache_flush_init: Cannot find %d byte "
854 "contiguous physical memory.\n",
855 ecache_flush_size);
856 prom_halt();
857 }
858
859 /* Now allocate error trap reporting scoreboard. */
860 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
861 for (order = 0; order < MAX_ORDER; order++) {
862 if ((PAGE_SIZE << order) >= sz)
863 break;
864 }
865 cheetah_error_log = (struct cheetah_err_info *)
866 __get_free_pages(GFP_KERNEL, order);
867 if (!cheetah_error_log) {
868 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
869 "error logging scoreboard (%d bytes).\n", sz);
870 prom_halt();
871 }
872 memset(cheetah_error_log, 0, PAGE_SIZE << order);
873
874 /* Mark all AFSRs as invalid so that the trap handler will
875 * log new new information there.
876 */
877 for (i = 0; i < 2 * NR_CPUS; i++)
878 cheetah_error_log[i].afsr = CHAFSR_INVALID;
879
880 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
881 if ((ver >> 32) == __JALAPENO_ID ||
882 (ver >> 32) == __SERRANO_ID) {
883 cheetah_error_table = &__jalapeno_error_table[0];
884 cheetah_afsr_errors = JPAFSR_ERRORS;
885 } else if ((ver >> 32) == 0x003e0015) {
886 cheetah_error_table = &__cheetah_plus_error_table[0];
887 cheetah_afsr_errors = CHPAFSR_ERRORS;
888 } else {
889 cheetah_error_table = &__cheetah_error_table[0];
890 cheetah_afsr_errors = CHAFSR_ERRORS;
891 }
892
893 /* Now patch trap tables. */
894 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
895 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
896 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
897 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
898 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
899 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
900 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
901 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
902 if (tlb_type == cheetah_plus) {
903 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
904 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
905 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
906 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
907 }
908 flushi(PAGE_OFFSET);
909}
910
911static void cheetah_flush_ecache(void)
912{
913 unsigned long flush_base = ecache_flush_physbase;
914 unsigned long flush_linesize = ecache_flush_linesize;
915 unsigned long flush_size = ecache_flush_size;
916
917 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
918 " bne,pt %%xcc, 1b\n\t"
919 " ldxa [%2 + %0] %3, %%g0\n\t"
920 : "=&r" (flush_size)
921 : "0" (flush_size), "r" (flush_base),
922 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
923}
924
925static void cheetah_flush_ecache_line(unsigned long physaddr)
926{
927 unsigned long alias;
928
929 physaddr &= ~(8UL - 1UL);
930 physaddr = (ecache_flush_physbase +
931 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
932 alias = physaddr + (ecache_flush_size >> 1UL);
933 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
934 "ldxa [%1] %2, %%g0\n\t"
935 "membar #Sync"
936 : /* no outputs */
937 : "r" (physaddr), "r" (alias),
938 "i" (ASI_PHYS_USE_EC));
939}
940
941/* Unfortunately, the diagnostic access to the I-cache tags we need to
942 * use to clear the thing interferes with I-cache coherency transactions.
943 *
944 * So we must only flush the I-cache when it is disabled.
945 */
946static void __cheetah_flush_icache(void)
947{
948 unsigned int icache_size, icache_line_size;
949 unsigned long addr;
950
951 icache_size = local_cpu_data().icache_size;
952 icache_line_size = local_cpu_data().icache_line_size;
953
954 /* Clear the valid bits in all the tags. */
955 for (addr = 0; addr < icache_size; addr += icache_line_size) {
956 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
957 "membar #Sync"
958 : /* no outputs */
959 : "r" (addr | (2 << 3)),
960 "i" (ASI_IC_TAG));
961 }
962}
963
964static void cheetah_flush_icache(void)
965{
966 unsigned long dcu_save;
967
968 /* Save current DCU, disable I-cache. */
969 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
970 "or %0, %2, %%g1\n\t"
971 "stxa %%g1, [%%g0] %1\n\t"
972 "membar #Sync"
973 : "=r" (dcu_save)
974 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
975 : "g1");
976
977 __cheetah_flush_icache();
978
979 /* Restore DCU register */
980 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
981 "membar #Sync"
982 : /* no outputs */
983 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
984}
985
986static void cheetah_flush_dcache(void)
987{
988 unsigned int dcache_size, dcache_line_size;
989 unsigned long addr;
990
991 dcache_size = local_cpu_data().dcache_size;
992 dcache_line_size = local_cpu_data().dcache_line_size;
993
994 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
995 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
996 "membar #Sync"
997 : /* no outputs */
998 : "r" (addr), "i" (ASI_DCACHE_TAG));
999 }
1000}
1001
1002/* In order to make the even parity correct we must do two things.
1003 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
1004 * Next, we clear out all 32-bytes of data for that line. Data of
1005 * all-zero + tag parity value of zero == correct parity.
1006 */
1007static void cheetah_plus_zap_dcache_parity(void)
1008{
1009 unsigned int dcache_size, dcache_line_size;
1010 unsigned long addr;
1011
1012 dcache_size = local_cpu_data().dcache_size;
1013 dcache_line_size = local_cpu_data().dcache_line_size;
1014
1015 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1016 unsigned long tag = (addr >> 14);
1017 unsigned long line;
1018
1019 __asm__ __volatile__("membar #Sync\n\t"
1020 "stxa %0, [%1] %2\n\t"
1021 "membar #Sync"
1022 : /* no outputs */
1023 : "r" (tag), "r" (addr),
1024 "i" (ASI_DCACHE_UTAG));
1025 for (line = addr; line < addr + dcache_line_size; line += 8)
1026 __asm__ __volatile__("membar #Sync\n\t"
1027 "stxa %%g0, [%0] %1\n\t"
1028 "membar #Sync"
1029 : /* no outputs */
1030 : "r" (line),
1031 "i" (ASI_DCACHE_DATA));
1032 }
1033}
1034
1035/* Conversion tables used to frob Cheetah AFSR syndrome values into
1036 * something palatable to the memory controller driver get_unumber
1037 * routine.
1038 */
1039#define MT0 137
1040#define MT1 138
1041#define MT2 139
1042#define NONE 254
1043#define MTC0 140
1044#define MTC1 141
1045#define MTC2 142
1046#define MTC3 143
1047#define C0 128
1048#define C1 129
1049#define C2 130
1050#define C3 131
1051#define C4 132
1052#define C5 133
1053#define C6 134
1054#define C7 135
1055#define C8 136
1056#define M2 144
1057#define M3 145
1058#define M4 146
1059#define M 147
1060static unsigned char cheetah_ecc_syntab[] = {
1061/*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1062/*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1063/*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1064/*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1065/*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1066/*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1067/*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1068/*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1069/*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1070/*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1071/*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1072/*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1073/*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1074/*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1075/*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1076/*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1077/*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1078/*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1079/*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1080/*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1081/*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1082/*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1083/*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1084/*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1085/*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1086/*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1087/*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1088/*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1089/*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1090/*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1091/*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1092/*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1093};
1094static unsigned char cheetah_mtag_syntab[] = {
1095 NONE, MTC0,
1096 MTC1, NONE,
1097 MTC2, NONE,
1098 NONE, MT0,
1099 MTC3, NONE,
1100 NONE, MT1,
1101 NONE, MT2,
1102 NONE, NONE
1103};
1104
1105/* Return the highest priority error conditon mentioned. */
1106static inline unsigned long cheetah_get_hipri(unsigned long afsr)
1107{
1108 unsigned long tmp = 0;
1109 int i;
1110
1111 for (i = 0; cheetah_error_table[i].mask; i++) {
1112 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1113 return tmp;
1114 }
1115 return tmp;
1116}
1117
1118static const char *cheetah_get_string(unsigned long bit)
1119{
1120 int i;
1121
1122 for (i = 0; cheetah_error_table[i].mask; i++) {
1123 if ((bit & cheetah_error_table[i].mask) != 0UL)
1124 return cheetah_error_table[i].name;
1125 }
1126 return "???";
1127}
1128
1129static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1130 unsigned long afsr, unsigned long afar, int recoverable)
1131{
1132 unsigned long hipri;
1133 char unum[256];
1134
1135 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1136 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1137 afsr, afar,
1138 (afsr & CHAFSR_TL1) ? 1 : 0);
1139 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1140 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1141 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1142 printk("%s" "ERROR(%d): ",
1143 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1144 printk("TPC<%pS>\n", (void *) regs->tpc);
1145 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1146 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1147 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1148 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1149 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1150 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1151 hipri = cheetah_get_hipri(afsr);
1152 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1153 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1154 hipri, cheetah_get_string(hipri));
1155
1156 /* Try to get unumber if relevant. */
1157#define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1158 CHAFSR_CPC | CHAFSR_CPU | \
1159 CHAFSR_UE | CHAFSR_CE | \
1160 CHAFSR_EDC | CHAFSR_EDU | \
1161 CHAFSR_UCC | CHAFSR_UCU | \
1162 CHAFSR_WDU | CHAFSR_WDC)
1163#define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1164 if (afsr & ESYND_ERRORS) {
1165 int syndrome;
1166 int ret;
1167
1168 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1169 syndrome = cheetah_ecc_syntab[syndrome];
1170 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1171 if (ret != -1)
1172 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1173 (recoverable ? KERN_WARNING : KERN_CRIT),
1174 smp_processor_id(), unum);
1175 } else if (afsr & MSYND_ERRORS) {
1176 int syndrome;
1177 int ret;
1178
1179 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1180 syndrome = cheetah_mtag_syntab[syndrome];
1181 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1182 if (ret != -1)
1183 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1184 (recoverable ? KERN_WARNING : KERN_CRIT),
1185 smp_processor_id(), unum);
1186 }
1187
1188 /* Now dump the cache snapshots. */
1189 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx]\n",
1190 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1191 (int) info->dcache_index,
1192 info->dcache_tag,
1193 info->dcache_utag,
1194 info->dcache_stag);
1195 printk("%s" "ERROR(%d): D-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1196 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1197 info->dcache_data[0],
1198 info->dcache_data[1],
1199 info->dcache_data[2],
1200 info->dcache_data[3]);
1201 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx] "
1202 "u[%016llx] l[%016llx]\n",
1203 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1204 (int) info->icache_index,
1205 info->icache_tag,
1206 info->icache_utag,
1207 info->icache_stag,
1208 info->icache_upper,
1209 info->icache_lower);
1210 printk("%s" "ERROR(%d): I-cache INSN0[%016llx] INSN1[%016llx] INSN2[%016llx] INSN3[%016llx]\n",
1211 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1212 info->icache_data[0],
1213 info->icache_data[1],
1214 info->icache_data[2],
1215 info->icache_data[3]);
1216 printk("%s" "ERROR(%d): I-cache INSN4[%016llx] INSN5[%016llx] INSN6[%016llx] INSN7[%016llx]\n",
1217 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1218 info->icache_data[4],
1219 info->icache_data[5],
1220 info->icache_data[6],
1221 info->icache_data[7]);
1222 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016llx]\n",
1223 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1224 (int) info->ecache_index, info->ecache_tag);
1225 printk("%s" "ERROR(%d): E-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1226 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1227 info->ecache_data[0],
1228 info->ecache_data[1],
1229 info->ecache_data[2],
1230 info->ecache_data[3]);
1231
1232 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1233 while (afsr != 0UL) {
1234 unsigned long bit = cheetah_get_hipri(afsr);
1235
1236 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1237 (recoverable ? KERN_WARNING : KERN_CRIT),
1238 bit, cheetah_get_string(bit));
1239
1240 afsr &= ~bit;
1241 }
1242
1243 if (!recoverable)
1244 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1245}
1246
1247static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1248{
1249 unsigned long afsr, afar;
1250 int ret = 0;
1251
1252 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1253 : "=r" (afsr)
1254 : "i" (ASI_AFSR));
1255 if ((afsr & cheetah_afsr_errors) != 0) {
1256 if (logp != NULL) {
1257 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1258 : "=r" (afar)
1259 : "i" (ASI_AFAR));
1260 logp->afsr = afsr;
1261 logp->afar = afar;
1262 }
1263 ret = 1;
1264 }
1265 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1266 "membar #Sync\n\t"
1267 : : "r" (afsr), "i" (ASI_AFSR));
1268
1269 return ret;
1270}
1271
1272void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1273{
1274 struct cheetah_err_info local_snapshot, *p;
1275 int recoverable;
1276
1277 /* Flush E-cache */
1278 cheetah_flush_ecache();
1279
1280 p = cheetah_get_error_log(afsr);
1281 if (!p) {
1282 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1283 afsr, afar);
1284 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1285 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1286 prom_halt();
1287 }
1288
1289 /* Grab snapshot of logged error. */
1290 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1291
1292 /* If the current trap snapshot does not match what the
1293 * trap handler passed along into our args, big trouble.
1294 * In such a case, mark the local copy as invalid.
1295 *
1296 * Else, it matches and we mark the afsr in the non-local
1297 * copy as invalid so we may log new error traps there.
1298 */
1299 if (p->afsr != afsr || p->afar != afar)
1300 local_snapshot.afsr = CHAFSR_INVALID;
1301 else
1302 p->afsr = CHAFSR_INVALID;
1303
1304 cheetah_flush_icache();
1305 cheetah_flush_dcache();
1306
1307 /* Re-enable I-cache/D-cache */
1308 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1309 "or %%g1, %1, %%g1\n\t"
1310 "stxa %%g1, [%%g0] %0\n\t"
1311 "membar #Sync"
1312 : /* no outputs */
1313 : "i" (ASI_DCU_CONTROL_REG),
1314 "i" (DCU_DC | DCU_IC)
1315 : "g1");
1316
1317 /* Re-enable error reporting */
1318 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1319 "or %%g1, %1, %%g1\n\t"
1320 "stxa %%g1, [%%g0] %0\n\t"
1321 "membar #Sync"
1322 : /* no outputs */
1323 : "i" (ASI_ESTATE_ERROR_EN),
1324 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1325 : "g1");
1326
1327 /* Decide if we can continue after handling this trap and
1328 * logging the error.
1329 */
1330 recoverable = 1;
1331 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1332 recoverable = 0;
1333
1334 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1335 * error was logged while we had error reporting traps disabled.
1336 */
1337 if (cheetah_recheck_errors(&local_snapshot)) {
1338 unsigned long new_afsr = local_snapshot.afsr;
1339
1340 /* If we got a new asynchronous error, die... */
1341 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1342 CHAFSR_WDU | CHAFSR_CPU |
1343 CHAFSR_IVU | CHAFSR_UE |
1344 CHAFSR_BERR | CHAFSR_TO))
1345 recoverable = 0;
1346 }
1347
1348 /* Log errors. */
1349 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1350
1351 if (!recoverable)
1352 panic("Irrecoverable Fast-ECC error trap.\n");
1353
1354 /* Flush E-cache to kick the error trap handlers out. */
1355 cheetah_flush_ecache();
1356}
1357
1358/* Try to fix a correctable error by pushing the line out from
1359 * the E-cache. Recheck error reporting registers to see if the
1360 * problem is intermittent.
1361 */
1362static int cheetah_fix_ce(unsigned long physaddr)
1363{
1364 unsigned long orig_estate;
1365 unsigned long alias1, alias2;
1366 int ret;
1367
1368 /* Make sure correctable error traps are disabled. */
1369 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1370 "andn %0, %1, %%g1\n\t"
1371 "stxa %%g1, [%%g0] %2\n\t"
1372 "membar #Sync"
1373 : "=&r" (orig_estate)
1374 : "i" (ESTATE_ERROR_CEEN),
1375 "i" (ASI_ESTATE_ERROR_EN)
1376 : "g1");
1377
1378 /* We calculate alias addresses that will force the
1379 * cache line in question out of the E-cache. Then
1380 * we bring it back in with an atomic instruction so
1381 * that we get it in some modified/exclusive state,
1382 * then we displace it again to try and get proper ECC
1383 * pushed back into the system.
1384 */
1385 physaddr &= ~(8UL - 1UL);
1386 alias1 = (ecache_flush_physbase +
1387 (physaddr & ((ecache_flush_size >> 1) - 1)));
1388 alias2 = alias1 + (ecache_flush_size >> 1);
1389 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1390 "ldxa [%1] %3, %%g0\n\t"
1391 "casxa [%2] %3, %%g0, %%g0\n\t"
1392 "ldxa [%0] %3, %%g0\n\t"
1393 "ldxa [%1] %3, %%g0\n\t"
1394 "membar #Sync"
1395 : /* no outputs */
1396 : "r" (alias1), "r" (alias2),
1397 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1398
1399 /* Did that trigger another error? */
1400 if (cheetah_recheck_errors(NULL)) {
1401 /* Try one more time. */
1402 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1403 "membar #Sync"
1404 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1405 if (cheetah_recheck_errors(NULL))
1406 ret = 2;
1407 else
1408 ret = 1;
1409 } else {
1410 /* No new error, intermittent problem. */
1411 ret = 0;
1412 }
1413
1414 /* Restore error enables. */
1415 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1416 "membar #Sync"
1417 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1418
1419 return ret;
1420}
1421
1422/* Return non-zero if PADDR is a valid physical memory address. */
1423static int cheetah_check_main_memory(unsigned long paddr)
1424{
1425 unsigned long vaddr = PAGE_OFFSET + paddr;
1426
1427 if (vaddr > (unsigned long) high_memory)
1428 return 0;
1429
1430 return kern_addr_valid(vaddr);
1431}
1432
1433void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1434{
1435 struct cheetah_err_info local_snapshot, *p;
1436 int recoverable, is_memory;
1437
1438 p = cheetah_get_error_log(afsr);
1439 if (!p) {
1440 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1441 afsr, afar);
1442 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1443 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1444 prom_halt();
1445 }
1446
1447 /* Grab snapshot of logged error. */
1448 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1449
1450 /* If the current trap snapshot does not match what the
1451 * trap handler passed along into our args, big trouble.
1452 * In such a case, mark the local copy as invalid.
1453 *
1454 * Else, it matches and we mark the afsr in the non-local
1455 * copy as invalid so we may log new error traps there.
1456 */
1457 if (p->afsr != afsr || p->afar != afar)
1458 local_snapshot.afsr = CHAFSR_INVALID;
1459 else
1460 p->afsr = CHAFSR_INVALID;
1461
1462 is_memory = cheetah_check_main_memory(afar);
1463
1464 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1465 /* XXX Might want to log the results of this operation
1466 * XXX somewhere... -DaveM
1467 */
1468 cheetah_fix_ce(afar);
1469 }
1470
1471 {
1472 int flush_all, flush_line;
1473
1474 flush_all = flush_line = 0;
1475 if ((afsr & CHAFSR_EDC) != 0UL) {
1476 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1477 flush_line = 1;
1478 else
1479 flush_all = 1;
1480 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1481 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1482 flush_line = 1;
1483 else
1484 flush_all = 1;
1485 }
1486
1487 /* Trap handler only disabled I-cache, flush it. */
1488 cheetah_flush_icache();
1489
1490 /* Re-enable I-cache */
1491 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1492 "or %%g1, %1, %%g1\n\t"
1493 "stxa %%g1, [%%g0] %0\n\t"
1494 "membar #Sync"
1495 : /* no outputs */
1496 : "i" (ASI_DCU_CONTROL_REG),
1497 "i" (DCU_IC)
1498 : "g1");
1499
1500 if (flush_all)
1501 cheetah_flush_ecache();
1502 else if (flush_line)
1503 cheetah_flush_ecache_line(afar);
1504 }
1505
1506 /* Re-enable error reporting */
1507 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1508 "or %%g1, %1, %%g1\n\t"
1509 "stxa %%g1, [%%g0] %0\n\t"
1510 "membar #Sync"
1511 : /* no outputs */
1512 : "i" (ASI_ESTATE_ERROR_EN),
1513 "i" (ESTATE_ERROR_CEEN)
1514 : "g1");
1515
1516 /* Decide if we can continue after handling this trap and
1517 * logging the error.
1518 */
1519 recoverable = 1;
1520 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1521 recoverable = 0;
1522
1523 /* Re-check AFSR/AFAR */
1524 (void) cheetah_recheck_errors(&local_snapshot);
1525
1526 /* Log errors. */
1527 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1528
1529 if (!recoverable)
1530 panic("Irrecoverable Correctable-ECC error trap.\n");
1531}
1532
1533void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1534{
1535 struct cheetah_err_info local_snapshot, *p;
1536 int recoverable, is_memory;
1537
1538#ifdef CONFIG_PCI
1539 /* Check for the special PCI poke sequence. */
1540 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1541 cheetah_flush_icache();
1542 cheetah_flush_dcache();
1543
1544 /* Re-enable I-cache/D-cache */
1545 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1546 "or %%g1, %1, %%g1\n\t"
1547 "stxa %%g1, [%%g0] %0\n\t"
1548 "membar #Sync"
1549 : /* no outputs */
1550 : "i" (ASI_DCU_CONTROL_REG),
1551 "i" (DCU_DC | DCU_IC)
1552 : "g1");
1553
1554 /* Re-enable error reporting */
1555 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1556 "or %%g1, %1, %%g1\n\t"
1557 "stxa %%g1, [%%g0] %0\n\t"
1558 "membar #Sync"
1559 : /* no outputs */
1560 : "i" (ASI_ESTATE_ERROR_EN),
1561 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1562 : "g1");
1563
1564 (void) cheetah_recheck_errors(NULL);
1565
1566 pci_poke_faulted = 1;
1567 regs->tpc += 4;
1568 regs->tnpc = regs->tpc + 4;
1569 return;
1570 }
1571#endif
1572
1573 p = cheetah_get_error_log(afsr);
1574 if (!p) {
1575 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1576 afsr, afar);
1577 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1578 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1579 prom_halt();
1580 }
1581
1582 /* Grab snapshot of logged error. */
1583 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1584
1585 /* If the current trap snapshot does not match what the
1586 * trap handler passed along into our args, big trouble.
1587 * In such a case, mark the local copy as invalid.
1588 *
1589 * Else, it matches and we mark the afsr in the non-local
1590 * copy as invalid so we may log new error traps there.
1591 */
1592 if (p->afsr != afsr || p->afar != afar)
1593 local_snapshot.afsr = CHAFSR_INVALID;
1594 else
1595 p->afsr = CHAFSR_INVALID;
1596
1597 is_memory = cheetah_check_main_memory(afar);
1598
1599 {
1600 int flush_all, flush_line;
1601
1602 flush_all = flush_line = 0;
1603 if ((afsr & CHAFSR_EDU) != 0UL) {
1604 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1605 flush_line = 1;
1606 else
1607 flush_all = 1;
1608 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1609 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1610 flush_line = 1;
1611 else
1612 flush_all = 1;
1613 }
1614
1615 cheetah_flush_icache();
1616 cheetah_flush_dcache();
1617
1618 /* Re-enable I/D caches */
1619 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1620 "or %%g1, %1, %%g1\n\t"
1621 "stxa %%g1, [%%g0] %0\n\t"
1622 "membar #Sync"
1623 : /* no outputs */
1624 : "i" (ASI_DCU_CONTROL_REG),
1625 "i" (DCU_IC | DCU_DC)
1626 : "g1");
1627
1628 if (flush_all)
1629 cheetah_flush_ecache();
1630 else if (flush_line)
1631 cheetah_flush_ecache_line(afar);
1632 }
1633
1634 /* Re-enable error reporting */
1635 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1636 "or %%g1, %1, %%g1\n\t"
1637 "stxa %%g1, [%%g0] %0\n\t"
1638 "membar #Sync"
1639 : /* no outputs */
1640 : "i" (ASI_ESTATE_ERROR_EN),
1641 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1642 : "g1");
1643
1644 /* Decide if we can continue after handling this trap and
1645 * logging the error.
1646 */
1647 recoverable = 1;
1648 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1649 recoverable = 0;
1650
1651 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1652 * error was logged while we had error reporting traps disabled.
1653 */
1654 if (cheetah_recheck_errors(&local_snapshot)) {
1655 unsigned long new_afsr = local_snapshot.afsr;
1656
1657 /* If we got a new asynchronous error, die... */
1658 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1659 CHAFSR_WDU | CHAFSR_CPU |
1660 CHAFSR_IVU | CHAFSR_UE |
1661 CHAFSR_BERR | CHAFSR_TO))
1662 recoverable = 0;
1663 }
1664
1665 /* Log errors. */
1666 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1667
1668 /* "Recoverable" here means we try to yank the page from ever
1669 * being newly used again. This depends upon a few things:
1670 * 1) Must be main memory, and AFAR must be valid.
1671 * 2) If we trapped from user, OK.
1672 * 3) Else, if we trapped from kernel we must find exception
1673 * table entry (ie. we have to have been accessing user
1674 * space).
1675 *
1676 * If AFAR is not in main memory, or we trapped from kernel
1677 * and cannot find an exception table entry, it is unacceptable
1678 * to try and continue.
1679 */
1680 if (recoverable && is_memory) {
1681 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1682 /* OK, usermode access. */
1683 recoverable = 1;
1684 } else {
1685 const struct exception_table_entry *entry;
1686
1687 entry = search_exception_tables(regs->tpc);
1688 if (entry) {
1689 /* OK, kernel access to userspace. */
1690 recoverable = 1;
1691
1692 } else {
1693 /* BAD, privileged state is corrupted. */
1694 recoverable = 0;
1695 }
1696
1697 if (recoverable) {
1698 if (pfn_valid(afar >> PAGE_SHIFT))
1699 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1700 else
1701 recoverable = 0;
1702
1703 /* Only perform fixup if we still have a
1704 * recoverable condition.
1705 */
1706 if (recoverable) {
1707 regs->tpc = entry->fixup;
1708 regs->tnpc = regs->tpc + 4;
1709 }
1710 }
1711 }
1712 } else {
1713 recoverable = 0;
1714 }
1715
1716 if (!recoverable)
1717 panic("Irrecoverable deferred error trap.\n");
1718}
1719
1720/* Handle a D/I cache parity error trap. TYPE is encoded as:
1721 *
1722 * Bit0: 0=dcache,1=icache
1723 * Bit1: 0=recoverable,1=unrecoverable
1724 *
1725 * The hardware has disabled both the I-cache and D-cache in
1726 * the %dcr register.
1727 */
1728void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1729{
1730 if (type & 0x1)
1731 __cheetah_flush_icache();
1732 else
1733 cheetah_plus_zap_dcache_parity();
1734 cheetah_flush_dcache();
1735
1736 /* Re-enable I-cache/D-cache */
1737 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1738 "or %%g1, %1, %%g1\n\t"
1739 "stxa %%g1, [%%g0] %0\n\t"
1740 "membar #Sync"
1741 : /* no outputs */
1742 : "i" (ASI_DCU_CONTROL_REG),
1743 "i" (DCU_DC | DCU_IC)
1744 : "g1");
1745
1746 if (type & 0x2) {
1747 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1748 smp_processor_id(),
1749 (type & 0x1) ? 'I' : 'D',
1750 regs->tpc);
1751 printk(KERN_EMERG "TPC<%pS>\n", (void *) regs->tpc);
1752 panic("Irrecoverable Cheetah+ parity error.");
1753 }
1754
1755 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1756 smp_processor_id(),
1757 (type & 0x1) ? 'I' : 'D',
1758 regs->tpc);
1759 printk(KERN_WARNING "TPC<%pS>\n", (void *) regs->tpc);
1760}
1761
1762struct sun4v_error_entry {
1763 u64 err_handle;
1764 u64 err_stick;
1765
1766 u32 err_type;
1767#define SUN4V_ERR_TYPE_UNDEFINED 0
1768#define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1769#define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1770#define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1771#define SUN4V_ERR_TYPE_WARNING_RES 4
1772
1773 u32 err_attrs;
1774#define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1775#define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1776#define SUN4V_ERR_ATTRS_PIO 0x00000004
1777#define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1778#define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1779#define SUN4V_ERR_ATTRS_USER_MODE 0x01000000
1780#define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000
1781#define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1782
1783 u64 err_raddr;
1784 u32 err_size;
1785 u16 err_cpu;
1786 u16 err_pad;
1787};
1788
1789static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1790static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1791
1792static const char *sun4v_err_type_to_str(u32 type)
1793{
1794 switch (type) {
1795 case SUN4V_ERR_TYPE_UNDEFINED:
1796 return "undefined";
1797 case SUN4V_ERR_TYPE_UNCORRECTED_RES:
1798 return "uncorrected resumable";
1799 case SUN4V_ERR_TYPE_PRECISE_NONRES:
1800 return "precise nonresumable";
1801 case SUN4V_ERR_TYPE_DEFERRED_NONRES:
1802 return "deferred nonresumable";
1803 case SUN4V_ERR_TYPE_WARNING_RES:
1804 return "warning resumable";
1805 default:
1806 return "unknown";
1807 }
1808}
1809
1810static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
1811{
1812 int cnt;
1813
1814 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1815 printk("%s: err_handle[%llx] err_stick[%llx] err_type[%08x:%s]\n",
1816 pfx,
1817 ent->err_handle, ent->err_stick,
1818 ent->err_type,
1819 sun4v_err_type_to_str(ent->err_type));
1820 printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n",
1821 pfx,
1822 ent->err_attrs,
1823 ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ?
1824 "processor" : ""),
1825 ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ?
1826 "memory" : ""),
1827 ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ?
1828 "pio" : ""),
1829 ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ?
1830 "integer-regs" : ""),
1831 ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ?
1832 "fpu-regs" : ""),
1833 ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ?
1834 "user" : ""),
1835 ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ?
1836 "privileged" : ""),
1837 ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ?
1838 "queue-full" : ""));
1839 printk("%s: err_raddr[%016llx] err_size[%u] err_cpu[%u]\n",
1840 pfx,
1841 ent->err_raddr, ent->err_size, ent->err_cpu);
1842
1843 show_regs(regs);
1844
1845 if ((cnt = atomic_read(ocnt)) != 0) {
1846 atomic_set(ocnt, 0);
1847 wmb();
1848 printk("%s: Queue overflowed %d times.\n",
1849 pfx, cnt);
1850 }
1851}
1852
1853/* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
1854 * Log the event and clear the first word of the entry.
1855 */
1856void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
1857{
1858 struct sun4v_error_entry *ent, local_copy;
1859 struct trap_per_cpu *tb;
1860 unsigned long paddr;
1861 int cpu;
1862
1863 cpu = get_cpu();
1864
1865 tb = &trap_block[cpu];
1866 paddr = tb->resum_kernel_buf_pa + offset;
1867 ent = __va(paddr);
1868
1869 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1870
1871 /* We have a local copy now, so release the entry. */
1872 ent->err_handle = 0;
1873 wmb();
1874
1875 put_cpu();
1876
1877 if (ent->err_type == SUN4V_ERR_TYPE_WARNING_RES) {
1878 /* If err_type is 0x4, it's a powerdown request. Do
1879 * not do the usual resumable error log because that
1880 * makes it look like some abnormal error.
1881 */
1882 printk(KERN_INFO "Power down request...\n");
1883 kill_cad_pid(SIGINT, 1);
1884 return;
1885 }
1886
1887 sun4v_log_error(regs, &local_copy, cpu,
1888 KERN_ERR "RESUMABLE ERROR",
1889 &sun4v_resum_oflow_cnt);
1890}
1891
1892/* If we try to printk() we'll probably make matters worse, by trying
1893 * to retake locks this cpu already holds or causing more errors. So
1894 * just bump a counter, and we'll report these counter bumps above.
1895 */
1896void sun4v_resum_overflow(struct pt_regs *regs)
1897{
1898 atomic_inc(&sun4v_resum_oflow_cnt);
1899}
1900
1901/* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
1902 * Log the event, clear the first word of the entry, and die.
1903 */
1904void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
1905{
1906 struct sun4v_error_entry *ent, local_copy;
1907 struct trap_per_cpu *tb;
1908 unsigned long paddr;
1909 int cpu;
1910
1911 cpu = get_cpu();
1912
1913 tb = &trap_block[cpu];
1914 paddr = tb->nonresum_kernel_buf_pa + offset;
1915 ent = __va(paddr);
1916
1917 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1918
1919 /* We have a local copy now, so release the entry. */
1920 ent->err_handle = 0;
1921 wmb();
1922
1923 put_cpu();
1924
1925#ifdef CONFIG_PCI
1926 /* Check for the special PCI poke sequence. */
1927 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
1928 pci_poke_faulted = 1;
1929 regs->tpc += 4;
1930 regs->tnpc = regs->tpc + 4;
1931 return;
1932 }
1933#endif
1934
1935 sun4v_log_error(regs, &local_copy, cpu,
1936 KERN_EMERG "NON-RESUMABLE ERROR",
1937 &sun4v_nonresum_oflow_cnt);
1938
1939 panic("Non-resumable error.");
1940}
1941
1942/* If we try to printk() we'll probably make matters worse, by trying
1943 * to retake locks this cpu already holds or causing more errors. So
1944 * just bump a counter, and we'll report these counter bumps above.
1945 */
1946void sun4v_nonresum_overflow(struct pt_regs *regs)
1947{
1948 /* XXX Actually even this can make not that much sense. Perhaps
1949 * XXX we should just pull the plug and panic directly from here?
1950 */
1951 atomic_inc(&sun4v_nonresum_oflow_cnt);
1952}
1953
1954unsigned long sun4v_err_itlb_vaddr;
1955unsigned long sun4v_err_itlb_ctx;
1956unsigned long sun4v_err_itlb_pte;
1957unsigned long sun4v_err_itlb_error;
1958
1959void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
1960{
1961 if (tl > 1)
1962 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1963
1964 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
1965 regs->tpc, tl);
1966 printk(KERN_EMERG "SUN4V-ITLB: TPC<%pS>\n", (void *) regs->tpc);
1967 printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
1968 printk(KERN_EMERG "SUN4V-ITLB: O7<%pS>\n",
1969 (void *) regs->u_regs[UREG_I7]);
1970 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
1971 "pte[%lx] error[%lx]\n",
1972 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
1973 sun4v_err_itlb_pte, sun4v_err_itlb_error);
1974
1975 prom_halt();
1976}
1977
1978unsigned long sun4v_err_dtlb_vaddr;
1979unsigned long sun4v_err_dtlb_ctx;
1980unsigned long sun4v_err_dtlb_pte;
1981unsigned long sun4v_err_dtlb_error;
1982
1983void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
1984{
1985 if (tl > 1)
1986 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1987
1988 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
1989 regs->tpc, tl);
1990 printk(KERN_EMERG "SUN4V-DTLB: TPC<%pS>\n", (void *) regs->tpc);
1991 printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
1992 printk(KERN_EMERG "SUN4V-DTLB: O7<%pS>\n",
1993 (void *) regs->u_regs[UREG_I7]);
1994 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
1995 "pte[%lx] error[%lx]\n",
1996 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
1997 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
1998
1999 prom_halt();
2000}
2001
2002void hypervisor_tlbop_error(unsigned long err, unsigned long op)
2003{
2004 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
2005 err, op);
2006}
2007
2008void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
2009{
2010 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
2011 err, op);
2012}
2013
2014void do_fpe_common(struct pt_regs *regs)
2015{
2016 if (regs->tstate & TSTATE_PRIV) {
2017 regs->tpc = regs->tnpc;
2018 regs->tnpc += 4;
2019 } else {
2020 unsigned long fsr = current_thread_info()->xfsr[0];
2021 siginfo_t info;
2022
2023 if (test_thread_flag(TIF_32BIT)) {
2024 regs->tpc &= 0xffffffff;
2025 regs->tnpc &= 0xffffffff;
2026 }
2027 info.si_signo = SIGFPE;
2028 info.si_errno = 0;
2029 info.si_addr = (void __user *)regs->tpc;
2030 info.si_trapno = 0;
2031 info.si_code = __SI_FAULT;
2032 if ((fsr & 0x1c000) == (1 << 14)) {
2033 if (fsr & 0x10)
2034 info.si_code = FPE_FLTINV;
2035 else if (fsr & 0x08)
2036 info.si_code = FPE_FLTOVF;
2037 else if (fsr & 0x04)
2038 info.si_code = FPE_FLTUND;
2039 else if (fsr & 0x02)
2040 info.si_code = FPE_FLTDIV;
2041 else if (fsr & 0x01)
2042 info.si_code = FPE_FLTRES;
2043 }
2044 force_sig_info(SIGFPE, &info, current);
2045 }
2046}
2047
2048void do_fpieee(struct pt_regs *regs)
2049{
2050 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2051 0, 0x24, SIGFPE) == NOTIFY_STOP)
2052 return;
2053
2054 do_fpe_common(regs);
2055}
2056
2057extern int do_mathemu(struct pt_regs *, struct fpustate *, bool);
2058
2059void do_fpother(struct pt_regs *regs)
2060{
2061 struct fpustate *f = FPUSTATE;
2062 int ret = 0;
2063
2064 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2065 0, 0x25, SIGFPE) == NOTIFY_STOP)
2066 return;
2067
2068 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2069 case (2 << 14): /* unfinished_FPop */
2070 case (3 << 14): /* unimplemented_FPop */
2071 ret = do_mathemu(regs, f, false);
2072 break;
2073 }
2074 if (ret)
2075 return;
2076 do_fpe_common(regs);
2077}
2078
2079void do_tof(struct pt_regs *regs)
2080{
2081 siginfo_t info;
2082
2083 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2084 0, 0x26, SIGEMT) == NOTIFY_STOP)
2085 return;
2086
2087 if (regs->tstate & TSTATE_PRIV)
2088 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2089 if (test_thread_flag(TIF_32BIT)) {
2090 regs->tpc &= 0xffffffff;
2091 regs->tnpc &= 0xffffffff;
2092 }
2093 info.si_signo = SIGEMT;
2094 info.si_errno = 0;
2095 info.si_code = EMT_TAGOVF;
2096 info.si_addr = (void __user *)regs->tpc;
2097 info.si_trapno = 0;
2098 force_sig_info(SIGEMT, &info, current);
2099}
2100
2101void do_div0(struct pt_regs *regs)
2102{
2103 siginfo_t info;
2104
2105 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2106 0, 0x28, SIGFPE) == NOTIFY_STOP)
2107 return;
2108
2109 if (regs->tstate & TSTATE_PRIV)
2110 die_if_kernel("TL0: Kernel divide by zero.", regs);
2111 if (test_thread_flag(TIF_32BIT)) {
2112 regs->tpc &= 0xffffffff;
2113 regs->tnpc &= 0xffffffff;
2114 }
2115 info.si_signo = SIGFPE;
2116 info.si_errno = 0;
2117 info.si_code = FPE_INTDIV;
2118 info.si_addr = (void __user *)regs->tpc;
2119 info.si_trapno = 0;
2120 force_sig_info(SIGFPE, &info, current);
2121}
2122
2123static void instruction_dump(unsigned int *pc)
2124{
2125 int i;
2126
2127 if ((((unsigned long) pc) & 3))
2128 return;
2129
2130 printk("Instruction DUMP:");
2131 for (i = -3; i < 6; i++)
2132 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2133 printk("\n");
2134}
2135
2136static void user_instruction_dump(unsigned int __user *pc)
2137{
2138 int i;
2139 unsigned int buf[9];
2140
2141 if ((((unsigned long) pc) & 3))
2142 return;
2143
2144 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2145 return;
2146
2147 printk("Instruction DUMP:");
2148 for (i = 0; i < 9; i++)
2149 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2150 printk("\n");
2151}
2152
2153void show_stack(struct task_struct *tsk, unsigned long *_ksp)
2154{
2155 unsigned long fp, ksp;
2156 struct thread_info *tp;
2157 int count = 0;
2158#ifdef CONFIG_FUNCTION_GRAPH_TRACER
2159 int graph = 0;
2160#endif
2161
2162 ksp = (unsigned long) _ksp;
2163 if (!tsk)
2164 tsk = current;
2165 tp = task_thread_info(tsk);
2166 if (ksp == 0UL) {
2167 if (tsk == current)
2168 asm("mov %%fp, %0" : "=r" (ksp));
2169 else
2170 ksp = tp->ksp;
2171 }
2172 if (tp == current_thread_info())
2173 flushw_all();
2174
2175 fp = ksp + STACK_BIAS;
2176
2177 printk("Call Trace:\n");
2178 do {
2179 struct sparc_stackf *sf;
2180 struct pt_regs *regs;
2181 unsigned long pc;
2182
2183 if (!kstack_valid(tp, fp))
2184 break;
2185 sf = (struct sparc_stackf *) fp;
2186 regs = (struct pt_regs *) (sf + 1);
2187
2188 if (kstack_is_trap_frame(tp, regs)) {
2189 if (!(regs->tstate & TSTATE_PRIV))
2190 break;
2191 pc = regs->tpc;
2192 fp = regs->u_regs[UREG_I6] + STACK_BIAS;
2193 } else {
2194 pc = sf->callers_pc;
2195 fp = (unsigned long)sf->fp + STACK_BIAS;
2196 }
2197
2198 printk(" [%016lx] %pS\n", pc, (void *) pc);
2199#ifdef CONFIG_FUNCTION_GRAPH_TRACER
2200 if ((pc + 8UL) == (unsigned long) &return_to_handler) {
2201 int index = tsk->curr_ret_stack;
2202 if (tsk->ret_stack && index >= graph) {
2203 pc = tsk->ret_stack[index - graph].ret;
2204 printk(" [%016lx] %pS\n", pc, (void *) pc);
2205 graph++;
2206 }
2207 }
2208#endif
2209 } while (++count < 16);
2210}
2211
2212void dump_stack(void)
2213{
2214 show_stack(current, NULL);
2215}
2216
2217EXPORT_SYMBOL(dump_stack);
2218
2219static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2220{
2221 unsigned long fp = rw->ins[6];
2222
2223 if (!fp)
2224 return NULL;
2225
2226 return (struct reg_window *) (fp + STACK_BIAS);
2227}
2228
2229void die_if_kernel(char *str, struct pt_regs *regs)
2230{
2231 static int die_counter;
2232 int count = 0;
2233
2234 /* Amuse the user. */
2235 printk(
2236" \\|/ ____ \\|/\n"
2237" \"@'/ .. \\`@\"\n"
2238" /_| \\__/ |_\\\n"
2239" \\__U_/\n");
2240
2241 printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
2242 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2243 __asm__ __volatile__("flushw");
2244 show_regs(regs);
2245 add_taint(TAINT_DIE);
2246 if (regs->tstate & TSTATE_PRIV) {
2247 struct thread_info *tp = current_thread_info();
2248 struct reg_window *rw = (struct reg_window *)
2249 (regs->u_regs[UREG_FP] + STACK_BIAS);
2250
2251 /* Stop the back trace when we hit userland or we
2252 * find some badly aligned kernel stack.
2253 */
2254 while (rw &&
2255 count++ < 30 &&
2256 kstack_valid(tp, (unsigned long) rw)) {
2257 printk("Caller[%016lx]: %pS\n", rw->ins[7],
2258 (void *) rw->ins[7]);
2259
2260 rw = kernel_stack_up(rw);
2261 }
2262 instruction_dump ((unsigned int *) regs->tpc);
2263 } else {
2264 if (test_thread_flag(TIF_32BIT)) {
2265 regs->tpc &= 0xffffffff;
2266 regs->tnpc &= 0xffffffff;
2267 }
2268 user_instruction_dump ((unsigned int __user *) regs->tpc);
2269 }
2270 if (regs->tstate & TSTATE_PRIV)
2271 do_exit(SIGKILL);
2272 do_exit(SIGSEGV);
2273}
2274EXPORT_SYMBOL(die_if_kernel);
2275
2276#define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2277#define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2278
2279extern int handle_popc(u32 insn, struct pt_regs *regs);
2280extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
2281
2282void do_illegal_instruction(struct pt_regs *regs)
2283{
2284 unsigned long pc = regs->tpc;
2285 unsigned long tstate = regs->tstate;
2286 u32 insn;
2287 siginfo_t info;
2288
2289 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2290 0, 0x10, SIGILL) == NOTIFY_STOP)
2291 return;
2292
2293 if (tstate & TSTATE_PRIV)
2294 die_if_kernel("Kernel illegal instruction", regs);
2295 if (test_thread_flag(TIF_32BIT))
2296 pc = (u32)pc;
2297 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2298 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2299 if (handle_popc(insn, regs))
2300 return;
2301 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2302 if (handle_ldf_stq(insn, regs))
2303 return;
2304 } else if (tlb_type == hypervisor) {
2305 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2306 if (!vis_emul(regs, insn))
2307 return;
2308 } else {
2309 struct fpustate *f = FPUSTATE;
2310
2311 /* On UltraSPARC T2 and later, FPU insns which
2312 * are not implemented in HW signal an illegal
2313 * instruction trap and do not set the FP Trap
2314 * Trap in the %fsr to unimplemented_FPop.
2315 */
2316 if (do_mathemu(regs, f, true))
2317 return;
2318 }
2319 }
2320 }
2321 info.si_signo = SIGILL;
2322 info.si_errno = 0;
2323 info.si_code = ILL_ILLOPC;
2324 info.si_addr = (void __user *)pc;
2325 info.si_trapno = 0;
2326 force_sig_info(SIGILL, &info, current);
2327}
2328
2329extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
2330
2331void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2332{
2333 siginfo_t info;
2334
2335 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2336 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2337 return;
2338
2339 if (regs->tstate & TSTATE_PRIV) {
2340 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2341 return;
2342 }
2343 info.si_signo = SIGBUS;
2344 info.si_errno = 0;
2345 info.si_code = BUS_ADRALN;
2346 info.si_addr = (void __user *)sfar;
2347 info.si_trapno = 0;
2348 force_sig_info(SIGBUS, &info, current);
2349}
2350
2351void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2352{
2353 siginfo_t info;
2354
2355 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2356 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2357 return;
2358
2359 if (regs->tstate & TSTATE_PRIV) {
2360 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2361 return;
2362 }
2363 info.si_signo = SIGBUS;
2364 info.si_errno = 0;
2365 info.si_code = BUS_ADRALN;
2366 info.si_addr = (void __user *) addr;
2367 info.si_trapno = 0;
2368 force_sig_info(SIGBUS, &info, current);
2369}
2370
2371void do_privop(struct pt_regs *regs)
2372{
2373 siginfo_t info;
2374
2375 if (notify_die(DIE_TRAP, "privileged operation", regs,
2376 0, 0x11, SIGILL) == NOTIFY_STOP)
2377 return;
2378
2379 if (test_thread_flag(TIF_32BIT)) {
2380 regs->tpc &= 0xffffffff;
2381 regs->tnpc &= 0xffffffff;
2382 }
2383 info.si_signo = SIGILL;
2384 info.si_errno = 0;
2385 info.si_code = ILL_PRVOPC;
2386 info.si_addr = (void __user *)regs->tpc;
2387 info.si_trapno = 0;
2388 force_sig_info(SIGILL, &info, current);
2389}
2390
2391void do_privact(struct pt_regs *regs)
2392{
2393 do_privop(regs);
2394}
2395
2396/* Trap level 1 stuff or other traps we should never see... */
2397void do_cee(struct pt_regs *regs)
2398{
2399 die_if_kernel("TL0: Cache Error Exception", regs);
2400}
2401
2402void do_cee_tl1(struct pt_regs *regs)
2403{
2404 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2405 die_if_kernel("TL1: Cache Error Exception", regs);
2406}
2407
2408void do_dae_tl1(struct pt_regs *regs)
2409{
2410 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2411 die_if_kernel("TL1: Data Access Exception", regs);
2412}
2413
2414void do_iae_tl1(struct pt_regs *regs)
2415{
2416 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2417 die_if_kernel("TL1: Instruction Access Exception", regs);
2418}
2419
2420void do_div0_tl1(struct pt_regs *regs)
2421{
2422 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2423 die_if_kernel("TL1: DIV0 Exception", regs);
2424}
2425
2426void do_fpdis_tl1(struct pt_regs *regs)
2427{
2428 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2429 die_if_kernel("TL1: FPU Disabled", regs);
2430}
2431
2432void do_fpieee_tl1(struct pt_regs *regs)
2433{
2434 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2435 die_if_kernel("TL1: FPU IEEE Exception", regs);
2436}
2437
2438void do_fpother_tl1(struct pt_regs *regs)
2439{
2440 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2441 die_if_kernel("TL1: FPU Other Exception", regs);
2442}
2443
2444void do_ill_tl1(struct pt_regs *regs)
2445{
2446 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2447 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2448}
2449
2450void do_irq_tl1(struct pt_regs *regs)
2451{
2452 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2453 die_if_kernel("TL1: IRQ Exception", regs);
2454}
2455
2456void do_lddfmna_tl1(struct pt_regs *regs)
2457{
2458 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2459 die_if_kernel("TL1: LDDF Exception", regs);
2460}
2461
2462void do_stdfmna_tl1(struct pt_regs *regs)
2463{
2464 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2465 die_if_kernel("TL1: STDF Exception", regs);
2466}
2467
2468void do_paw(struct pt_regs *regs)
2469{
2470 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2471}
2472
2473void do_paw_tl1(struct pt_regs *regs)
2474{
2475 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2476 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2477}
2478
2479void do_vaw(struct pt_regs *regs)
2480{
2481 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2482}
2483
2484void do_vaw_tl1(struct pt_regs *regs)
2485{
2486 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2487 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2488}
2489
2490void do_tof_tl1(struct pt_regs *regs)
2491{
2492 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2493 die_if_kernel("TL1: Tag Overflow Exception", regs);
2494}
2495
2496void do_getpsr(struct pt_regs *regs)
2497{
2498 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2499 regs->tpc = regs->tnpc;
2500 regs->tnpc += 4;
2501 if (test_thread_flag(TIF_32BIT)) {
2502 regs->tpc &= 0xffffffff;
2503 regs->tnpc &= 0xffffffff;
2504 }
2505}
2506
2507struct trap_per_cpu trap_block[NR_CPUS];
2508EXPORT_SYMBOL(trap_block);
2509
2510/* This can get invoked before sched_init() so play it super safe
2511 * and use hard_smp_processor_id().
2512 */
2513void notrace init_cur_cpu_trap(struct thread_info *t)
2514{
2515 int cpu = hard_smp_processor_id();
2516 struct trap_per_cpu *p = &trap_block[cpu];
2517
2518 p->thread = t;
2519 p->pgd_paddr = 0;
2520}
2521
2522extern void thread_info_offsets_are_bolixed_dave(void);
2523extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2524extern void tsb_config_offsets_are_bolixed_dave(void);
2525
2526/* Only invoked on boot processor. */
2527void __init trap_init(void)
2528{
2529 /* Compile time sanity check. */
2530 BUILD_BUG_ON(TI_TASK != offsetof(struct thread_info, task) ||
2531 TI_FLAGS != offsetof(struct thread_info, flags) ||
2532 TI_CPU != offsetof(struct thread_info, cpu) ||
2533 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2534 TI_KSP != offsetof(struct thread_info, ksp) ||
2535 TI_FAULT_ADDR != offsetof(struct thread_info,
2536 fault_address) ||
2537 TI_KREGS != offsetof(struct thread_info, kregs) ||
2538 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2539 TI_EXEC_DOMAIN != offsetof(struct thread_info,
2540 exec_domain) ||
2541 TI_REG_WINDOW != offsetof(struct thread_info,
2542 reg_window) ||
2543 TI_RWIN_SPTRS != offsetof(struct thread_info,
2544 rwbuf_stkptrs) ||
2545 TI_GSR != offsetof(struct thread_info, gsr) ||
2546 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2547 TI_PRE_COUNT != offsetof(struct thread_info,
2548 preempt_count) ||
2549 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2550 TI_SYS_NOERROR != offsetof(struct thread_info,
2551 syscall_noerror) ||
2552 TI_RESTART_BLOCK != offsetof(struct thread_info,
2553 restart_block) ||
2554 TI_KUNA_REGS != offsetof(struct thread_info,
2555 kern_una_regs) ||
2556 TI_KUNA_INSN != offsetof(struct thread_info,
2557 kern_una_insn) ||
2558 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2559 (TI_FPREGS & (64 - 1)));
2560
2561 BUILD_BUG_ON(TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu,
2562 thread) ||
2563 (TRAP_PER_CPU_PGD_PADDR !=
2564 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2565 (TRAP_PER_CPU_CPU_MONDO_PA !=
2566 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2567 (TRAP_PER_CPU_DEV_MONDO_PA !=
2568 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2569 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2570 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2571 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2572 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2573 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2574 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2575 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2576 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2577 (TRAP_PER_CPU_FAULT_INFO !=
2578 offsetof(struct trap_per_cpu, fault_info)) ||
2579 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2580 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2581 (TRAP_PER_CPU_CPU_LIST_PA !=
2582 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2583 (TRAP_PER_CPU_TSB_HUGE !=
2584 offsetof(struct trap_per_cpu, tsb_huge)) ||
2585 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2586 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2587 (TRAP_PER_CPU_IRQ_WORKLIST_PA !=
2588 offsetof(struct trap_per_cpu, irq_worklist_pa)) ||
2589 (TRAP_PER_CPU_CPU_MONDO_QMASK !=
2590 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) ||
2591 (TRAP_PER_CPU_DEV_MONDO_QMASK !=
2592 offsetof(struct trap_per_cpu, dev_mondo_qmask)) ||
2593 (TRAP_PER_CPU_RESUM_QMASK !=
2594 offsetof(struct trap_per_cpu, resum_qmask)) ||
2595 (TRAP_PER_CPU_NONRESUM_QMASK !=
2596 offsetof(struct trap_per_cpu, nonresum_qmask)) ||
2597 (TRAP_PER_CPU_PER_CPU_BASE !=
2598 offsetof(struct trap_per_cpu, __per_cpu_base)));
2599
2600 BUILD_BUG_ON((TSB_CONFIG_TSB !=
2601 offsetof(struct tsb_config, tsb)) ||
2602 (TSB_CONFIG_RSS_LIMIT !=
2603 offsetof(struct tsb_config, tsb_rss_limit)) ||
2604 (TSB_CONFIG_NENTRIES !=
2605 offsetof(struct tsb_config, tsb_nentries)) ||
2606 (TSB_CONFIG_REG_VAL !=
2607 offsetof(struct tsb_config, tsb_reg_val)) ||
2608 (TSB_CONFIG_MAP_VADDR !=
2609 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2610 (TSB_CONFIG_MAP_PTE !=
2611 offsetof(struct tsb_config, tsb_map_pte)));
2612
2613 /* Attach to the address space of init_task. On SMP we
2614 * do this in smp.c:smp_callin for other cpus.
2615 */
2616 atomic_inc(&init_mm.mm_count);
2617 current->active_mm = &init_mm;
2618}
1// SPDX-License-Identifier: GPL-2.0-only
2/* arch/sparc64/kernel/traps.c
3 *
4 * Copyright (C) 1995,1997,2008,2009,2012 David S. Miller (davem@davemloft.net)
5 * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com)
6 */
7
8/*
9 * I like traps on v9, :))))
10 */
11
12#include <linux/extable.h>
13#include <linux/sched/mm.h>
14#include <linux/sched/debug.h>
15#include <linux/linkage.h>
16#include <linux/kernel.h>
17#include <linux/signal.h>
18#include <linux/smp.h>
19#include <linux/mm.h>
20#include <linux/init.h>
21#include <linux/kallsyms.h>
22#include <linux/kdebug.h>
23#include <linux/ftrace.h>
24#include <linux/reboot.h>
25#include <linux/gfp.h>
26#include <linux/context_tracking.h>
27
28#include <asm/smp.h>
29#include <asm/delay.h>
30#include <asm/ptrace.h>
31#include <asm/oplib.h>
32#include <asm/page.h>
33#include <asm/unistd.h>
34#include <linux/uaccess.h>
35#include <asm/fpumacro.h>
36#include <asm/lsu.h>
37#include <asm/dcu.h>
38#include <asm/estate.h>
39#include <asm/chafsr.h>
40#include <asm/sfafsr.h>
41#include <asm/psrcompat.h>
42#include <asm/processor.h>
43#include <asm/timer.h>
44#include <asm/head.h>
45#include <asm/prom.h>
46#include <asm/memctrl.h>
47#include <asm/cacheflush.h>
48#include <asm/setup.h>
49
50#include "entry.h"
51#include "kernel.h"
52#include "kstack.h"
53
54/* When an irrecoverable trap occurs at tl > 0, the trap entry
55 * code logs the trap state registers at every level in the trap
56 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
57 * is as follows:
58 */
59struct tl1_traplog {
60 struct {
61 unsigned long tstate;
62 unsigned long tpc;
63 unsigned long tnpc;
64 unsigned long tt;
65 } trapstack[4];
66 unsigned long tl;
67};
68
69static void dump_tl1_traplog(struct tl1_traplog *p)
70{
71 int i, limit;
72
73 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
74 "dumping track stack.\n", p->tl);
75
76 limit = (tlb_type == hypervisor) ? 2 : 4;
77 for (i = 0; i < limit; i++) {
78 printk(KERN_EMERG
79 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
80 "TNPC[%016lx] TT[%lx]\n",
81 i + 1,
82 p->trapstack[i].tstate, p->trapstack[i].tpc,
83 p->trapstack[i].tnpc, p->trapstack[i].tt);
84 printk("TRAPLOG: TPC<%pS>\n", (void *) p->trapstack[i].tpc);
85 }
86}
87
88void bad_trap(struct pt_regs *regs, long lvl)
89{
90 char buffer[36];
91
92 if (notify_die(DIE_TRAP, "bad trap", regs,
93 0, lvl, SIGTRAP) == NOTIFY_STOP)
94 return;
95
96 if (lvl < 0x100) {
97 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
98 die_if_kernel(buffer, regs);
99 }
100
101 lvl -= 0x100;
102 if (regs->tstate & TSTATE_PRIV) {
103 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
104 die_if_kernel(buffer, regs);
105 }
106 if (test_thread_flag(TIF_32BIT)) {
107 regs->tpc &= 0xffffffff;
108 regs->tnpc &= 0xffffffff;
109 }
110 force_sig_fault_trapno(SIGILL, ILL_ILLTRP,
111 (void __user *)regs->tpc, lvl);
112}
113
114void bad_trap_tl1(struct pt_regs *regs, long lvl)
115{
116 char buffer[36];
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
129void do_BUG(const char *file, int line)
130{
131 bust_spinlocks(1);
132 printk("kernel BUG at %s:%d!\n", file, line);
133}
134EXPORT_SYMBOL(do_BUG);
135#endif
136
137static DEFINE_SPINLOCK(dimm_handler_lock);
138static dimm_printer_t dimm_handler;
139
140static 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
160int 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}
174EXPORT_SYMBOL_GPL(register_dimm_printer);
175
176void 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}
185EXPORT_SYMBOL_GPL(unregister_dimm_printer);
186
187void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
188{
189 enum ctx_state prev_state = exception_enter();
190
191 if (notify_die(DIE_TRAP, "instruction access exception", regs,
192 0, 0x8, SIGTRAP) == NOTIFY_STOP)
193 goto out;
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 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)regs->tpc);
205out:
206 exception_exit(prev_state);
207}
208
209void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
210{
211 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
212 0, 0x8, SIGTRAP) == NOTIFY_STOP)
213 return;
214
215 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
216 spitfire_insn_access_exception(regs, sfsr, sfar);
217}
218
219void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
220{
221 unsigned short type = (type_ctx >> 16);
222 unsigned short ctx = (type_ctx & 0xffff);
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 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *) addr);
240}
241
242void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
243{
244 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
245 0, 0x8, SIGTRAP) == NOTIFY_STOP)
246 return;
247
248 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
249 sun4v_insn_access_exception(regs, addr, type_ctx);
250}
251
252bool is_no_fault_exception(struct pt_regs *regs)
253{
254 unsigned char asi;
255 u32 insn;
256
257 if (get_user(insn, (u32 __user *)regs->tpc) == -EFAULT)
258 return false;
259
260 /*
261 * Must do a little instruction decoding here in order to
262 * decide on a course of action. The bits of interest are:
263 * insn[31:30] = op, where 3 indicates the load/store group
264 * insn[24:19] = op3, which identifies individual opcodes
265 * insn[13] indicates an immediate offset
266 * op3[4]=1 identifies alternate space instructions
267 * op3[5:4]=3 identifies floating point instructions
268 * op3[2]=1 identifies stores
269 * See "Opcode Maps" in the appendix of any Sparc V9
270 * architecture spec for full details.
271 */
272 if ((insn & 0xc0800000) == 0xc0800000) { /* op=3, op3[4]=1 */
273 if (insn & 0x2000) /* immediate offset */
274 asi = (regs->tstate >> 24); /* saved %asi */
275 else
276 asi = (insn >> 5); /* immediate asi */
277 if ((asi & 0xf6) == ASI_PNF) {
278 if (insn & 0x200000) /* op3[2], stores */
279 return false;
280 if (insn & 0x1000000) /* op3[5:4]=3 (fp) */
281 handle_ldf_stq(insn, regs);
282 else
283 handle_ld_nf(insn, regs);
284 return true;
285 }
286 }
287 return false;
288}
289
290void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
291{
292 enum ctx_state prev_state = exception_enter();
293
294 if (notify_die(DIE_TRAP, "data access exception", regs,
295 0, 0x30, SIGTRAP) == NOTIFY_STOP)
296 goto out;
297
298 if (regs->tstate & TSTATE_PRIV) {
299 /* Test if this comes from uaccess places. */
300 const struct exception_table_entry *entry;
301
302 entry = search_exception_tables(regs->tpc);
303 if (entry) {
304 /* Ouch, somebody is trying VM hole tricks on us... */
305#ifdef DEBUG_EXCEPTIONS
306 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
307 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
308 regs->tpc, entry->fixup);
309#endif
310 regs->tpc = entry->fixup;
311 regs->tnpc = regs->tpc + 4;
312 goto out;
313 }
314 /* Shit... */
315 printk("spitfire_data_access_exception: SFSR[%016lx] "
316 "SFAR[%016lx], going.\n", sfsr, sfar);
317 die_if_kernel("Dax", regs);
318 }
319
320 if (is_no_fault_exception(regs))
321 return;
322
323 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)sfar);
324out:
325 exception_exit(prev_state);
326}
327
328void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
329{
330 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
331 0, 0x30, SIGTRAP) == NOTIFY_STOP)
332 return;
333
334 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
335 spitfire_data_access_exception(regs, sfsr, sfar);
336}
337
338void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
339{
340 unsigned short type = (type_ctx >> 16);
341 unsigned short ctx = (type_ctx & 0xffff);
342
343 if (notify_die(DIE_TRAP, "data access exception", regs,
344 0, 0x8, SIGTRAP) == NOTIFY_STOP)
345 return;
346
347 if (regs->tstate & TSTATE_PRIV) {
348 /* Test if this comes from uaccess places. */
349 const struct exception_table_entry *entry;
350
351 entry = search_exception_tables(regs->tpc);
352 if (entry) {
353 /* Ouch, somebody is trying VM hole tricks on us... */
354#ifdef DEBUG_EXCEPTIONS
355 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
356 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
357 regs->tpc, entry->fixup);
358#endif
359 regs->tpc = entry->fixup;
360 regs->tnpc = regs->tpc + 4;
361 return;
362 }
363 printk("sun4v_data_access_exception: ADDR[%016lx] "
364 "CTX[%04x] TYPE[%04x], going.\n",
365 addr, ctx, type);
366 die_if_kernel("Dax", regs);
367 }
368
369 if (test_thread_flag(TIF_32BIT)) {
370 regs->tpc &= 0xffffffff;
371 regs->tnpc &= 0xffffffff;
372 }
373 if (is_no_fault_exception(regs))
374 return;
375
376 /* MCD (Memory Corruption Detection) disabled trap (TT=0x19) in HV
377 * is vectored thorugh data access exception trap with fault type
378 * set to HV_FAULT_TYPE_MCD_DIS. Check for MCD disabled trap.
379 * Accessing an address with invalid ASI for the address, for
380 * example setting an ADI tag on an address with ASI_MCD_PRIMARY
381 * when TTE.mcd is not set for the VA, is also vectored into
382 * kerbel by HV as data access exception with fault type set to
383 * HV_FAULT_TYPE_INV_ASI.
384 */
385 switch (type) {
386 case HV_FAULT_TYPE_INV_ASI:
387 force_sig_fault(SIGILL, ILL_ILLADR, (void __user *)addr);
388 break;
389 case HV_FAULT_TYPE_MCD_DIS:
390 force_sig_fault(SIGSEGV, SEGV_ACCADI, (void __user *)addr);
391 break;
392 default:
393 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)addr);
394 break;
395 }
396}
397
398void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
399{
400 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
401 0, 0x8, SIGTRAP) == NOTIFY_STOP)
402 return;
403
404 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
405 sun4v_data_access_exception(regs, addr, type_ctx);
406}
407
408#ifdef CONFIG_PCI
409#include "pci_impl.h"
410#endif
411
412/* When access exceptions happen, we must do this. */
413static void spitfire_clean_and_reenable_l1_caches(void)
414{
415 unsigned long va;
416
417 if (tlb_type != spitfire)
418 BUG();
419
420 /* Clean 'em. */
421 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
422 spitfire_put_icache_tag(va, 0x0);
423 spitfire_put_dcache_tag(va, 0x0);
424 }
425
426 /* Re-enable in LSU. */
427 __asm__ __volatile__("flush %%g6\n\t"
428 "membar #Sync\n\t"
429 "stxa %0, [%%g0] %1\n\t"
430 "membar #Sync"
431 : /* no outputs */
432 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
433 LSU_CONTROL_IM | LSU_CONTROL_DM),
434 "i" (ASI_LSU_CONTROL)
435 : "memory");
436}
437
438static void spitfire_enable_estate_errors(void)
439{
440 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
441 "membar #Sync"
442 : /* no outputs */
443 : "r" (ESTATE_ERR_ALL),
444 "i" (ASI_ESTATE_ERROR_EN));
445}
446
447static char ecc_syndrome_table[] = {
448 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
449 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
450 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
451 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
452 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
453 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
454 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
455 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
456 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
457 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
458 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
459 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
460 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
461 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
462 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
463 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
464 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
465 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
466 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
467 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
468 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
469 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
470 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
471 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
472 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
473 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
474 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
475 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
476 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
477 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
478 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
479 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
480};
481
482static char *syndrome_unknown = "<Unknown>";
483
484static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
485{
486 unsigned short scode;
487 char memmod_str[64], *p;
488
489 if (udbl & bit) {
490 scode = ecc_syndrome_table[udbl & 0xff];
491 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
492 p = syndrome_unknown;
493 else
494 p = memmod_str;
495 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
496 "Memory Module \"%s\"\n",
497 smp_processor_id(), scode, p);
498 }
499
500 if (udbh & bit) {
501 scode = ecc_syndrome_table[udbh & 0xff];
502 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
503 p = syndrome_unknown;
504 else
505 p = memmod_str;
506 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
507 "Memory Module \"%s\"\n",
508 smp_processor_id(), scode, p);
509 }
510
511}
512
513static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
514{
515
516 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
517 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
518 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
519
520 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
521
522 /* We always log it, even if someone is listening for this
523 * trap.
524 */
525 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
526 0, TRAP_TYPE_CEE, SIGTRAP);
527
528 /* The Correctable ECC Error trap does not disable I/D caches. So
529 * we only have to restore the ESTATE Error Enable register.
530 */
531 spitfire_enable_estate_errors();
532}
533
534static 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)
535{
536 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
537 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
538 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
539
540 /* XXX add more human friendly logging of the error status
541 * XXX as is implemented for cheetah
542 */
543
544 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
545
546 /* We always log it, even if someone is listening for this
547 * trap.
548 */
549 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
550 0, tt, SIGTRAP);
551
552 if (regs->tstate & TSTATE_PRIV) {
553 if (tl1)
554 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
555 die_if_kernel("UE", regs);
556 }
557
558 /* XXX need more intelligent processing here, such as is implemented
559 * XXX for cheetah errors, in fact if the E-cache still holds the
560 * XXX line with bad parity this will loop
561 */
562
563 spitfire_clean_and_reenable_l1_caches();
564 spitfire_enable_estate_errors();
565
566 if (test_thread_flag(TIF_32BIT)) {
567 regs->tpc &= 0xffffffff;
568 regs->tnpc &= 0xffffffff;
569 }
570 force_sig_fault(SIGBUS, BUS_OBJERR, (void *)0);
571}
572
573void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
574{
575 unsigned long afsr, tt, udbh, udbl;
576 int tl1;
577
578 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
579 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
580 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
581 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
582 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
583
584#ifdef CONFIG_PCI
585 if (tt == TRAP_TYPE_DAE &&
586 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
587 spitfire_clean_and_reenable_l1_caches();
588 spitfire_enable_estate_errors();
589
590 pci_poke_faulted = 1;
591 regs->tnpc = regs->tpc + 4;
592 return;
593 }
594#endif
595
596 if (afsr & SFAFSR_UE)
597 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
598
599 if (tt == TRAP_TYPE_CEE) {
600 /* Handle the case where we took a CEE trap, but ACK'd
601 * only the UE state in the UDB error registers.
602 */
603 if (afsr & SFAFSR_UE) {
604 if (udbh & UDBE_CE) {
605 __asm__ __volatile__(
606 "stxa %0, [%1] %2\n\t"
607 "membar #Sync"
608 : /* no outputs */
609 : "r" (udbh & UDBE_CE),
610 "r" (0x0), "i" (ASI_UDB_ERROR_W));
611 }
612 if (udbl & UDBE_CE) {
613 __asm__ __volatile__(
614 "stxa %0, [%1] %2\n\t"
615 "membar #Sync"
616 : /* no outputs */
617 : "r" (udbl & UDBE_CE),
618 "r" (0x18), "i" (ASI_UDB_ERROR_W));
619 }
620 }
621
622 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
623 }
624}
625
626int cheetah_pcache_forced_on;
627
628void cheetah_enable_pcache(void)
629{
630 unsigned long dcr;
631
632 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
633 smp_processor_id());
634
635 __asm__ __volatile__("ldxa [%%g0] %1, %0"
636 : "=r" (dcr)
637 : "i" (ASI_DCU_CONTROL_REG));
638 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
639 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
640 "membar #Sync"
641 : /* no outputs */
642 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
643}
644
645/* Cheetah error trap handling. */
646static unsigned long ecache_flush_physbase;
647static unsigned long ecache_flush_linesize;
648static unsigned long ecache_flush_size;
649
650/* This table is ordered in priority of errors and matches the
651 * AFAR overwrite policy as well.
652 */
653
654struct afsr_error_table {
655 unsigned long mask;
656 const char *name;
657};
658
659static const char CHAFSR_PERR_msg[] =
660 "System interface protocol error";
661static const char CHAFSR_IERR_msg[] =
662 "Internal processor error";
663static const char CHAFSR_ISAP_msg[] =
664 "System request parity error on incoming address";
665static const char CHAFSR_UCU_msg[] =
666 "Uncorrectable E-cache ECC error for ifetch/data";
667static const char CHAFSR_UCC_msg[] =
668 "SW Correctable E-cache ECC error for ifetch/data";
669static const char CHAFSR_UE_msg[] =
670 "Uncorrectable system bus data ECC error for read";
671static const char CHAFSR_EDU_msg[] =
672 "Uncorrectable E-cache ECC error for stmerge/blkld";
673static const char CHAFSR_EMU_msg[] =
674 "Uncorrectable system bus MTAG error";
675static const char CHAFSR_WDU_msg[] =
676 "Uncorrectable E-cache ECC error for writeback";
677static const char CHAFSR_CPU_msg[] =
678 "Uncorrectable ECC error for copyout";
679static const char CHAFSR_CE_msg[] =
680 "HW corrected system bus data ECC error for read";
681static const char CHAFSR_EDC_msg[] =
682 "HW corrected E-cache ECC error for stmerge/blkld";
683static const char CHAFSR_EMC_msg[] =
684 "HW corrected system bus MTAG ECC error";
685static const char CHAFSR_WDC_msg[] =
686 "HW corrected E-cache ECC error for writeback";
687static const char CHAFSR_CPC_msg[] =
688 "HW corrected ECC error for copyout";
689static const char CHAFSR_TO_msg[] =
690 "Unmapped error from system bus";
691static const char CHAFSR_BERR_msg[] =
692 "Bus error response from system bus";
693static const char CHAFSR_IVC_msg[] =
694 "HW corrected system bus data ECC error for ivec read";
695static const char CHAFSR_IVU_msg[] =
696 "Uncorrectable system bus data ECC error for ivec read";
697static struct afsr_error_table __cheetah_error_table[] = {
698 { CHAFSR_PERR, CHAFSR_PERR_msg },
699 { CHAFSR_IERR, CHAFSR_IERR_msg },
700 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
701 { CHAFSR_UCU, CHAFSR_UCU_msg },
702 { CHAFSR_UCC, CHAFSR_UCC_msg },
703 { CHAFSR_UE, CHAFSR_UE_msg },
704 { CHAFSR_EDU, CHAFSR_EDU_msg },
705 { CHAFSR_EMU, CHAFSR_EMU_msg },
706 { CHAFSR_WDU, CHAFSR_WDU_msg },
707 { CHAFSR_CPU, CHAFSR_CPU_msg },
708 { CHAFSR_CE, CHAFSR_CE_msg },
709 { CHAFSR_EDC, CHAFSR_EDC_msg },
710 { CHAFSR_EMC, CHAFSR_EMC_msg },
711 { CHAFSR_WDC, CHAFSR_WDC_msg },
712 { CHAFSR_CPC, CHAFSR_CPC_msg },
713 { CHAFSR_TO, CHAFSR_TO_msg },
714 { CHAFSR_BERR, CHAFSR_BERR_msg },
715 /* These two do not update the AFAR. */
716 { CHAFSR_IVC, CHAFSR_IVC_msg },
717 { CHAFSR_IVU, CHAFSR_IVU_msg },
718 { 0, NULL },
719};
720static const char CHPAFSR_DTO_msg[] =
721 "System bus unmapped error for prefetch/storequeue-read";
722static const char CHPAFSR_DBERR_msg[] =
723 "System bus error for prefetch/storequeue-read";
724static const char CHPAFSR_THCE_msg[] =
725 "Hardware corrected E-cache Tag ECC error";
726static const char CHPAFSR_TSCE_msg[] =
727 "SW handled correctable E-cache Tag ECC error";
728static const char CHPAFSR_TUE_msg[] =
729 "Uncorrectable E-cache Tag ECC error";
730static const char CHPAFSR_DUE_msg[] =
731 "System bus uncorrectable data ECC error due to prefetch/store-fill";
732static struct afsr_error_table __cheetah_plus_error_table[] = {
733 { CHAFSR_PERR, CHAFSR_PERR_msg },
734 { CHAFSR_IERR, CHAFSR_IERR_msg },
735 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
736 { CHAFSR_UCU, CHAFSR_UCU_msg },
737 { CHAFSR_UCC, CHAFSR_UCC_msg },
738 { CHAFSR_UE, CHAFSR_UE_msg },
739 { CHAFSR_EDU, CHAFSR_EDU_msg },
740 { CHAFSR_EMU, CHAFSR_EMU_msg },
741 { CHAFSR_WDU, CHAFSR_WDU_msg },
742 { CHAFSR_CPU, CHAFSR_CPU_msg },
743 { CHAFSR_CE, CHAFSR_CE_msg },
744 { CHAFSR_EDC, CHAFSR_EDC_msg },
745 { CHAFSR_EMC, CHAFSR_EMC_msg },
746 { CHAFSR_WDC, CHAFSR_WDC_msg },
747 { CHAFSR_CPC, CHAFSR_CPC_msg },
748 { CHAFSR_TO, CHAFSR_TO_msg },
749 { CHAFSR_BERR, CHAFSR_BERR_msg },
750 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
751 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
752 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
753 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
754 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
755 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
756 /* These two do not update the AFAR. */
757 { CHAFSR_IVC, CHAFSR_IVC_msg },
758 { CHAFSR_IVU, CHAFSR_IVU_msg },
759 { 0, NULL },
760};
761static const char JPAFSR_JETO_msg[] =
762 "System interface protocol error, hw timeout caused";
763static const char JPAFSR_SCE_msg[] =
764 "Parity error on system snoop results";
765static const char JPAFSR_JEIC_msg[] =
766 "System interface protocol error, illegal command detected";
767static const char JPAFSR_JEIT_msg[] =
768 "System interface protocol error, illegal ADTYPE detected";
769static const char JPAFSR_OM_msg[] =
770 "Out of range memory error has occurred";
771static const char JPAFSR_ETP_msg[] =
772 "Parity error on L2 cache tag SRAM";
773static const char JPAFSR_UMS_msg[] =
774 "Error due to unsupported store";
775static const char JPAFSR_RUE_msg[] =
776 "Uncorrectable ECC error from remote cache/memory";
777static const char JPAFSR_RCE_msg[] =
778 "Correctable ECC error from remote cache/memory";
779static const char JPAFSR_BP_msg[] =
780 "JBUS parity error on returned read data";
781static const char JPAFSR_WBP_msg[] =
782 "JBUS parity error on data for writeback or block store";
783static const char JPAFSR_FRC_msg[] =
784 "Foreign read to DRAM incurring correctable ECC error";
785static const char JPAFSR_FRU_msg[] =
786 "Foreign read to DRAM incurring uncorrectable ECC error";
787static struct afsr_error_table __jalapeno_error_table[] = {
788 { JPAFSR_JETO, JPAFSR_JETO_msg },
789 { JPAFSR_SCE, JPAFSR_SCE_msg },
790 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
791 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
792 { CHAFSR_PERR, CHAFSR_PERR_msg },
793 { CHAFSR_IERR, CHAFSR_IERR_msg },
794 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
795 { CHAFSR_UCU, CHAFSR_UCU_msg },
796 { CHAFSR_UCC, CHAFSR_UCC_msg },
797 { CHAFSR_UE, CHAFSR_UE_msg },
798 { CHAFSR_EDU, CHAFSR_EDU_msg },
799 { JPAFSR_OM, JPAFSR_OM_msg },
800 { CHAFSR_WDU, CHAFSR_WDU_msg },
801 { CHAFSR_CPU, CHAFSR_CPU_msg },
802 { CHAFSR_CE, CHAFSR_CE_msg },
803 { CHAFSR_EDC, CHAFSR_EDC_msg },
804 { JPAFSR_ETP, JPAFSR_ETP_msg },
805 { CHAFSR_WDC, CHAFSR_WDC_msg },
806 { CHAFSR_CPC, CHAFSR_CPC_msg },
807 { CHAFSR_TO, CHAFSR_TO_msg },
808 { CHAFSR_BERR, CHAFSR_BERR_msg },
809 { JPAFSR_UMS, JPAFSR_UMS_msg },
810 { JPAFSR_RUE, JPAFSR_RUE_msg },
811 { JPAFSR_RCE, JPAFSR_RCE_msg },
812 { JPAFSR_BP, JPAFSR_BP_msg },
813 { JPAFSR_WBP, JPAFSR_WBP_msg },
814 { JPAFSR_FRC, JPAFSR_FRC_msg },
815 { JPAFSR_FRU, JPAFSR_FRU_msg },
816 /* These two do not update the AFAR. */
817 { CHAFSR_IVU, CHAFSR_IVU_msg },
818 { 0, NULL },
819};
820static struct afsr_error_table *cheetah_error_table;
821static unsigned long cheetah_afsr_errors;
822
823struct cheetah_err_info *cheetah_error_log;
824
825static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
826{
827 struct cheetah_err_info *p;
828 int cpu = smp_processor_id();
829
830 if (!cheetah_error_log)
831 return NULL;
832
833 p = cheetah_error_log + (cpu * 2);
834 if ((afsr & CHAFSR_TL1) != 0UL)
835 p++;
836
837 return p;
838}
839
840extern unsigned int tl0_icpe[], tl1_icpe[];
841extern unsigned int tl0_dcpe[], tl1_dcpe[];
842extern unsigned int tl0_fecc[], tl1_fecc[];
843extern unsigned int tl0_cee[], tl1_cee[];
844extern unsigned int tl0_iae[], tl1_iae[];
845extern unsigned int tl0_dae[], tl1_dae[];
846extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
847extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
848extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
849extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
850extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
851
852void __init cheetah_ecache_flush_init(void)
853{
854 unsigned long largest_size, smallest_linesize, order, ver;
855 int i, sz;
856
857 /* Scan all cpu device tree nodes, note two values:
858 * 1) largest E-cache size
859 * 2) smallest E-cache line size
860 */
861 largest_size = 0UL;
862 smallest_linesize = ~0UL;
863
864 for (i = 0; i < NR_CPUS; i++) {
865 unsigned long val;
866
867 val = cpu_data(i).ecache_size;
868 if (!val)
869 continue;
870
871 if (val > largest_size)
872 largest_size = val;
873
874 val = cpu_data(i).ecache_line_size;
875 if (val < smallest_linesize)
876 smallest_linesize = val;
877
878 }
879
880 if (largest_size == 0UL || smallest_linesize == ~0UL) {
881 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
882 "parameters.\n");
883 prom_halt();
884 }
885
886 ecache_flush_size = (2 * largest_size);
887 ecache_flush_linesize = smallest_linesize;
888
889 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
890
891 if (ecache_flush_physbase == ~0UL) {
892 prom_printf("cheetah_ecache_flush_init: Cannot find %ld byte "
893 "contiguous physical memory.\n",
894 ecache_flush_size);
895 prom_halt();
896 }
897
898 /* Now allocate error trap reporting scoreboard. */
899 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
900 for (order = 0; order < MAX_ORDER; order++) {
901 if ((PAGE_SIZE << order) >= sz)
902 break;
903 }
904 cheetah_error_log = (struct cheetah_err_info *)
905 __get_free_pages(GFP_KERNEL, order);
906 if (!cheetah_error_log) {
907 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
908 "error logging scoreboard (%d bytes).\n", sz);
909 prom_halt();
910 }
911 memset(cheetah_error_log, 0, PAGE_SIZE << order);
912
913 /* Mark all AFSRs as invalid so that the trap handler will
914 * log new new information there.
915 */
916 for (i = 0; i < 2 * NR_CPUS; i++)
917 cheetah_error_log[i].afsr = CHAFSR_INVALID;
918
919 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
920 if ((ver >> 32) == __JALAPENO_ID ||
921 (ver >> 32) == __SERRANO_ID) {
922 cheetah_error_table = &__jalapeno_error_table[0];
923 cheetah_afsr_errors = JPAFSR_ERRORS;
924 } else if ((ver >> 32) == 0x003e0015) {
925 cheetah_error_table = &__cheetah_plus_error_table[0];
926 cheetah_afsr_errors = CHPAFSR_ERRORS;
927 } else {
928 cheetah_error_table = &__cheetah_error_table[0];
929 cheetah_afsr_errors = CHAFSR_ERRORS;
930 }
931
932 /* Now patch trap tables. */
933 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
934 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
935 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
936 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
937 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
938 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
939 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
940 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
941 if (tlb_type == cheetah_plus) {
942 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
943 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
944 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
945 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
946 }
947 flushi(PAGE_OFFSET);
948}
949
950static void cheetah_flush_ecache(void)
951{
952 unsigned long flush_base = ecache_flush_physbase;
953 unsigned long flush_linesize = ecache_flush_linesize;
954 unsigned long flush_size = ecache_flush_size;
955
956 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
957 " bne,pt %%xcc, 1b\n\t"
958 " ldxa [%2 + %0] %3, %%g0\n\t"
959 : "=&r" (flush_size)
960 : "0" (flush_size), "r" (flush_base),
961 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
962}
963
964static void cheetah_flush_ecache_line(unsigned long physaddr)
965{
966 unsigned long alias;
967
968 physaddr &= ~(8UL - 1UL);
969 physaddr = (ecache_flush_physbase +
970 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
971 alias = physaddr + (ecache_flush_size >> 1UL);
972 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
973 "ldxa [%1] %2, %%g0\n\t"
974 "membar #Sync"
975 : /* no outputs */
976 : "r" (physaddr), "r" (alias),
977 "i" (ASI_PHYS_USE_EC));
978}
979
980/* Unfortunately, the diagnostic access to the I-cache tags we need to
981 * use to clear the thing interferes with I-cache coherency transactions.
982 *
983 * So we must only flush the I-cache when it is disabled.
984 */
985static void __cheetah_flush_icache(void)
986{
987 unsigned int icache_size, icache_line_size;
988 unsigned long addr;
989
990 icache_size = local_cpu_data().icache_size;
991 icache_line_size = local_cpu_data().icache_line_size;
992
993 /* Clear the valid bits in all the tags. */
994 for (addr = 0; addr < icache_size; addr += icache_line_size) {
995 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
996 "membar #Sync"
997 : /* no outputs */
998 : "r" (addr | (2 << 3)),
999 "i" (ASI_IC_TAG));
1000 }
1001}
1002
1003static void cheetah_flush_icache(void)
1004{
1005 unsigned long dcu_save;
1006
1007 /* Save current DCU, disable I-cache. */
1008 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1009 "or %0, %2, %%g1\n\t"
1010 "stxa %%g1, [%%g0] %1\n\t"
1011 "membar #Sync"
1012 : "=r" (dcu_save)
1013 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
1014 : "g1");
1015
1016 __cheetah_flush_icache();
1017
1018 /* Restore DCU register */
1019 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1020 "membar #Sync"
1021 : /* no outputs */
1022 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
1023}
1024
1025static void cheetah_flush_dcache(void)
1026{
1027 unsigned int dcache_size, dcache_line_size;
1028 unsigned long addr;
1029
1030 dcache_size = local_cpu_data().dcache_size;
1031 dcache_line_size = local_cpu_data().dcache_line_size;
1032
1033 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1034 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
1035 "membar #Sync"
1036 : /* no outputs */
1037 : "r" (addr), "i" (ASI_DCACHE_TAG));
1038 }
1039}
1040
1041/* In order to make the even parity correct we must do two things.
1042 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
1043 * Next, we clear out all 32-bytes of data for that line. Data of
1044 * all-zero + tag parity value of zero == correct parity.
1045 */
1046static void cheetah_plus_zap_dcache_parity(void)
1047{
1048 unsigned int dcache_size, dcache_line_size;
1049 unsigned long addr;
1050
1051 dcache_size = local_cpu_data().dcache_size;
1052 dcache_line_size = local_cpu_data().dcache_line_size;
1053
1054 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1055 unsigned long tag = (addr >> 14);
1056 unsigned long line;
1057
1058 __asm__ __volatile__("membar #Sync\n\t"
1059 "stxa %0, [%1] %2\n\t"
1060 "membar #Sync"
1061 : /* no outputs */
1062 : "r" (tag), "r" (addr),
1063 "i" (ASI_DCACHE_UTAG));
1064 for (line = addr; line < addr + dcache_line_size; line += 8)
1065 __asm__ __volatile__("membar #Sync\n\t"
1066 "stxa %%g0, [%0] %1\n\t"
1067 "membar #Sync"
1068 : /* no outputs */
1069 : "r" (line),
1070 "i" (ASI_DCACHE_DATA));
1071 }
1072}
1073
1074/* Conversion tables used to frob Cheetah AFSR syndrome values into
1075 * something palatable to the memory controller driver get_unumber
1076 * routine.
1077 */
1078#define MT0 137
1079#define MT1 138
1080#define MT2 139
1081#define NONE 254
1082#define MTC0 140
1083#define MTC1 141
1084#define MTC2 142
1085#define MTC3 143
1086#define C0 128
1087#define C1 129
1088#define C2 130
1089#define C3 131
1090#define C4 132
1091#define C5 133
1092#define C6 134
1093#define C7 135
1094#define C8 136
1095#define M2 144
1096#define M3 145
1097#define M4 146
1098#define M 147
1099static unsigned char cheetah_ecc_syntab[] = {
1100/*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1101/*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1102/*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1103/*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1104/*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1105/*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1106/*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1107/*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1108/*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1109/*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1110/*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1111/*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1112/*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1113/*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1114/*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1115/*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1116/*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1117/*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1118/*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1119/*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1120/*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1121/*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1122/*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1123/*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1124/*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1125/*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1126/*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1127/*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1128/*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1129/*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1130/*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1131/*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1132};
1133static unsigned char cheetah_mtag_syntab[] = {
1134 NONE, MTC0,
1135 MTC1, NONE,
1136 MTC2, NONE,
1137 NONE, MT0,
1138 MTC3, NONE,
1139 NONE, MT1,
1140 NONE, MT2,
1141 NONE, NONE
1142};
1143
1144/* Return the highest priority error conditon mentioned. */
1145static inline unsigned long cheetah_get_hipri(unsigned long afsr)
1146{
1147 unsigned long tmp = 0;
1148 int i;
1149
1150 for (i = 0; cheetah_error_table[i].mask; i++) {
1151 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1152 return tmp;
1153 }
1154 return tmp;
1155}
1156
1157static const char *cheetah_get_string(unsigned long bit)
1158{
1159 int i;
1160
1161 for (i = 0; cheetah_error_table[i].mask; i++) {
1162 if ((bit & cheetah_error_table[i].mask) != 0UL)
1163 return cheetah_error_table[i].name;
1164 }
1165 return "???";
1166}
1167
1168static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1169 unsigned long afsr, unsigned long afar, int recoverable)
1170{
1171 unsigned long hipri;
1172 char unum[256];
1173
1174 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1175 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1176 afsr, afar,
1177 (afsr & CHAFSR_TL1) ? 1 : 0);
1178 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1179 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1180 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1181 printk("%s" "ERROR(%d): ",
1182 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1183 printk("TPC<%pS>\n", (void *) regs->tpc);
1184 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1185 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1186 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1187 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1188 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1189 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1190 hipri = cheetah_get_hipri(afsr);
1191 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1192 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1193 hipri, cheetah_get_string(hipri));
1194
1195 /* Try to get unumber if relevant. */
1196#define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1197 CHAFSR_CPC | CHAFSR_CPU | \
1198 CHAFSR_UE | CHAFSR_CE | \
1199 CHAFSR_EDC | CHAFSR_EDU | \
1200 CHAFSR_UCC | CHAFSR_UCU | \
1201 CHAFSR_WDU | CHAFSR_WDC)
1202#define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1203 if (afsr & ESYND_ERRORS) {
1204 int syndrome;
1205 int ret;
1206
1207 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1208 syndrome = cheetah_ecc_syntab[syndrome];
1209 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1210 if (ret != -1)
1211 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1212 (recoverable ? KERN_WARNING : KERN_CRIT),
1213 smp_processor_id(), unum);
1214 } else if (afsr & MSYND_ERRORS) {
1215 int syndrome;
1216 int ret;
1217
1218 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1219 syndrome = cheetah_mtag_syntab[syndrome];
1220 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1221 if (ret != -1)
1222 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1223 (recoverable ? KERN_WARNING : KERN_CRIT),
1224 smp_processor_id(), unum);
1225 }
1226
1227 /* Now dump the cache snapshots. */
1228 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx]\n",
1229 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1230 (int) info->dcache_index,
1231 info->dcache_tag,
1232 info->dcache_utag,
1233 info->dcache_stag);
1234 printk("%s" "ERROR(%d): D-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1235 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1236 info->dcache_data[0],
1237 info->dcache_data[1],
1238 info->dcache_data[2],
1239 info->dcache_data[3]);
1240 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx] "
1241 "u[%016llx] l[%016llx]\n",
1242 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1243 (int) info->icache_index,
1244 info->icache_tag,
1245 info->icache_utag,
1246 info->icache_stag,
1247 info->icache_upper,
1248 info->icache_lower);
1249 printk("%s" "ERROR(%d): I-cache INSN0[%016llx] INSN1[%016llx] INSN2[%016llx] INSN3[%016llx]\n",
1250 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1251 info->icache_data[0],
1252 info->icache_data[1],
1253 info->icache_data[2],
1254 info->icache_data[3]);
1255 printk("%s" "ERROR(%d): I-cache INSN4[%016llx] INSN5[%016llx] INSN6[%016llx] INSN7[%016llx]\n",
1256 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1257 info->icache_data[4],
1258 info->icache_data[5],
1259 info->icache_data[6],
1260 info->icache_data[7]);
1261 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016llx]\n",
1262 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1263 (int) info->ecache_index, info->ecache_tag);
1264 printk("%s" "ERROR(%d): E-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1265 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1266 info->ecache_data[0],
1267 info->ecache_data[1],
1268 info->ecache_data[2],
1269 info->ecache_data[3]);
1270
1271 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1272 while (afsr != 0UL) {
1273 unsigned long bit = cheetah_get_hipri(afsr);
1274
1275 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1276 (recoverable ? KERN_WARNING : KERN_CRIT),
1277 bit, cheetah_get_string(bit));
1278
1279 afsr &= ~bit;
1280 }
1281
1282 if (!recoverable)
1283 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1284}
1285
1286static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1287{
1288 unsigned long afsr, afar;
1289 int ret = 0;
1290
1291 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1292 : "=r" (afsr)
1293 : "i" (ASI_AFSR));
1294 if ((afsr & cheetah_afsr_errors) != 0) {
1295 if (logp != NULL) {
1296 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1297 : "=r" (afar)
1298 : "i" (ASI_AFAR));
1299 logp->afsr = afsr;
1300 logp->afar = afar;
1301 }
1302 ret = 1;
1303 }
1304 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1305 "membar #Sync\n\t"
1306 : : "r" (afsr), "i" (ASI_AFSR));
1307
1308 return ret;
1309}
1310
1311void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1312{
1313 struct cheetah_err_info local_snapshot, *p;
1314 int recoverable;
1315
1316 /* Flush E-cache */
1317 cheetah_flush_ecache();
1318
1319 p = cheetah_get_error_log(afsr);
1320 if (!p) {
1321 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1322 afsr, afar);
1323 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1324 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1325 prom_halt();
1326 }
1327
1328 /* Grab snapshot of logged error. */
1329 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1330
1331 /* If the current trap snapshot does not match what the
1332 * trap handler passed along into our args, big trouble.
1333 * In such a case, mark the local copy as invalid.
1334 *
1335 * Else, it matches and we mark the afsr in the non-local
1336 * copy as invalid so we may log new error traps there.
1337 */
1338 if (p->afsr != afsr || p->afar != afar)
1339 local_snapshot.afsr = CHAFSR_INVALID;
1340 else
1341 p->afsr = CHAFSR_INVALID;
1342
1343 cheetah_flush_icache();
1344 cheetah_flush_dcache();
1345
1346 /* Re-enable I-cache/D-cache */
1347 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1348 "or %%g1, %1, %%g1\n\t"
1349 "stxa %%g1, [%%g0] %0\n\t"
1350 "membar #Sync"
1351 : /* no outputs */
1352 : "i" (ASI_DCU_CONTROL_REG),
1353 "i" (DCU_DC | DCU_IC)
1354 : "g1");
1355
1356 /* Re-enable error reporting */
1357 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1358 "or %%g1, %1, %%g1\n\t"
1359 "stxa %%g1, [%%g0] %0\n\t"
1360 "membar #Sync"
1361 : /* no outputs */
1362 : "i" (ASI_ESTATE_ERROR_EN),
1363 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1364 : "g1");
1365
1366 /* Decide if we can continue after handling this trap and
1367 * logging the error.
1368 */
1369 recoverable = 1;
1370 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1371 recoverable = 0;
1372
1373 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1374 * error was logged while we had error reporting traps disabled.
1375 */
1376 if (cheetah_recheck_errors(&local_snapshot)) {
1377 unsigned long new_afsr = local_snapshot.afsr;
1378
1379 /* If we got a new asynchronous error, die... */
1380 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1381 CHAFSR_WDU | CHAFSR_CPU |
1382 CHAFSR_IVU | CHAFSR_UE |
1383 CHAFSR_BERR | CHAFSR_TO))
1384 recoverable = 0;
1385 }
1386
1387 /* Log errors. */
1388 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1389
1390 if (!recoverable)
1391 panic("Irrecoverable Fast-ECC error trap.\n");
1392
1393 /* Flush E-cache to kick the error trap handlers out. */
1394 cheetah_flush_ecache();
1395}
1396
1397/* Try to fix a correctable error by pushing the line out from
1398 * the E-cache. Recheck error reporting registers to see if the
1399 * problem is intermittent.
1400 */
1401static int cheetah_fix_ce(unsigned long physaddr)
1402{
1403 unsigned long orig_estate;
1404 unsigned long alias1, alias2;
1405 int ret;
1406
1407 /* Make sure correctable error traps are disabled. */
1408 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1409 "andn %0, %1, %%g1\n\t"
1410 "stxa %%g1, [%%g0] %2\n\t"
1411 "membar #Sync"
1412 : "=&r" (orig_estate)
1413 : "i" (ESTATE_ERROR_CEEN),
1414 "i" (ASI_ESTATE_ERROR_EN)
1415 : "g1");
1416
1417 /* We calculate alias addresses that will force the
1418 * cache line in question out of the E-cache. Then
1419 * we bring it back in with an atomic instruction so
1420 * that we get it in some modified/exclusive state,
1421 * then we displace it again to try and get proper ECC
1422 * pushed back into the system.
1423 */
1424 physaddr &= ~(8UL - 1UL);
1425 alias1 = (ecache_flush_physbase +
1426 (physaddr & ((ecache_flush_size >> 1) - 1)));
1427 alias2 = alias1 + (ecache_flush_size >> 1);
1428 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1429 "ldxa [%1] %3, %%g0\n\t"
1430 "casxa [%2] %3, %%g0, %%g0\n\t"
1431 "ldxa [%0] %3, %%g0\n\t"
1432 "ldxa [%1] %3, %%g0\n\t"
1433 "membar #Sync"
1434 : /* no outputs */
1435 : "r" (alias1), "r" (alias2),
1436 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1437
1438 /* Did that trigger another error? */
1439 if (cheetah_recheck_errors(NULL)) {
1440 /* Try one more time. */
1441 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1442 "membar #Sync"
1443 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1444 if (cheetah_recheck_errors(NULL))
1445 ret = 2;
1446 else
1447 ret = 1;
1448 } else {
1449 /* No new error, intermittent problem. */
1450 ret = 0;
1451 }
1452
1453 /* Restore error enables. */
1454 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1455 "membar #Sync"
1456 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1457
1458 return ret;
1459}
1460
1461/* Return non-zero if PADDR is a valid physical memory address. */
1462static int cheetah_check_main_memory(unsigned long paddr)
1463{
1464 unsigned long vaddr = PAGE_OFFSET + paddr;
1465
1466 if (vaddr > (unsigned long) high_memory)
1467 return 0;
1468
1469 return kern_addr_valid(vaddr);
1470}
1471
1472void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1473{
1474 struct cheetah_err_info local_snapshot, *p;
1475 int recoverable, is_memory;
1476
1477 p = cheetah_get_error_log(afsr);
1478 if (!p) {
1479 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1480 afsr, afar);
1481 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1482 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1483 prom_halt();
1484 }
1485
1486 /* Grab snapshot of logged error. */
1487 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1488
1489 /* If the current trap snapshot does not match what the
1490 * trap handler passed along into our args, big trouble.
1491 * In such a case, mark the local copy as invalid.
1492 *
1493 * Else, it matches and we mark the afsr in the non-local
1494 * copy as invalid so we may log new error traps there.
1495 */
1496 if (p->afsr != afsr || p->afar != afar)
1497 local_snapshot.afsr = CHAFSR_INVALID;
1498 else
1499 p->afsr = CHAFSR_INVALID;
1500
1501 is_memory = cheetah_check_main_memory(afar);
1502
1503 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1504 /* XXX Might want to log the results of this operation
1505 * XXX somewhere... -DaveM
1506 */
1507 cheetah_fix_ce(afar);
1508 }
1509
1510 {
1511 int flush_all, flush_line;
1512
1513 flush_all = flush_line = 0;
1514 if ((afsr & CHAFSR_EDC) != 0UL) {
1515 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1516 flush_line = 1;
1517 else
1518 flush_all = 1;
1519 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1520 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1521 flush_line = 1;
1522 else
1523 flush_all = 1;
1524 }
1525
1526 /* Trap handler only disabled I-cache, flush it. */
1527 cheetah_flush_icache();
1528
1529 /* Re-enable I-cache */
1530 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1531 "or %%g1, %1, %%g1\n\t"
1532 "stxa %%g1, [%%g0] %0\n\t"
1533 "membar #Sync"
1534 : /* no outputs */
1535 : "i" (ASI_DCU_CONTROL_REG),
1536 "i" (DCU_IC)
1537 : "g1");
1538
1539 if (flush_all)
1540 cheetah_flush_ecache();
1541 else if (flush_line)
1542 cheetah_flush_ecache_line(afar);
1543 }
1544
1545 /* Re-enable error reporting */
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_ESTATE_ERROR_EN),
1552 "i" (ESTATE_ERROR_CEEN)
1553 : "g1");
1554
1555 /* Decide if we can continue after handling this trap and
1556 * logging the error.
1557 */
1558 recoverable = 1;
1559 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1560 recoverable = 0;
1561
1562 /* Re-check AFSR/AFAR */
1563 (void) cheetah_recheck_errors(&local_snapshot);
1564
1565 /* Log errors. */
1566 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1567
1568 if (!recoverable)
1569 panic("Irrecoverable Correctable-ECC error trap.\n");
1570}
1571
1572void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1573{
1574 struct cheetah_err_info local_snapshot, *p;
1575 int recoverable, is_memory;
1576
1577#ifdef CONFIG_PCI
1578 /* Check for the special PCI poke sequence. */
1579 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1580 cheetah_flush_icache();
1581 cheetah_flush_dcache();
1582
1583 /* Re-enable I-cache/D-cache */
1584 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1585 "or %%g1, %1, %%g1\n\t"
1586 "stxa %%g1, [%%g0] %0\n\t"
1587 "membar #Sync"
1588 : /* no outputs */
1589 : "i" (ASI_DCU_CONTROL_REG),
1590 "i" (DCU_DC | DCU_IC)
1591 : "g1");
1592
1593 /* Re-enable error reporting */
1594 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1595 "or %%g1, %1, %%g1\n\t"
1596 "stxa %%g1, [%%g0] %0\n\t"
1597 "membar #Sync"
1598 : /* no outputs */
1599 : "i" (ASI_ESTATE_ERROR_EN),
1600 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1601 : "g1");
1602
1603 (void) cheetah_recheck_errors(NULL);
1604
1605 pci_poke_faulted = 1;
1606 regs->tpc += 4;
1607 regs->tnpc = regs->tpc + 4;
1608 return;
1609 }
1610#endif
1611
1612 p = cheetah_get_error_log(afsr);
1613 if (!p) {
1614 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1615 afsr, afar);
1616 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1617 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1618 prom_halt();
1619 }
1620
1621 /* Grab snapshot of logged error. */
1622 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1623
1624 /* If the current trap snapshot does not match what the
1625 * trap handler passed along into our args, big trouble.
1626 * In such a case, mark the local copy as invalid.
1627 *
1628 * Else, it matches and we mark the afsr in the non-local
1629 * copy as invalid so we may log new error traps there.
1630 */
1631 if (p->afsr != afsr || p->afar != afar)
1632 local_snapshot.afsr = CHAFSR_INVALID;
1633 else
1634 p->afsr = CHAFSR_INVALID;
1635
1636 is_memory = cheetah_check_main_memory(afar);
1637
1638 {
1639 int flush_all, flush_line;
1640
1641 flush_all = flush_line = 0;
1642 if ((afsr & CHAFSR_EDU) != 0UL) {
1643 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1644 flush_line = 1;
1645 else
1646 flush_all = 1;
1647 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1648 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1649 flush_line = 1;
1650 else
1651 flush_all = 1;
1652 }
1653
1654 cheetah_flush_icache();
1655 cheetah_flush_dcache();
1656
1657 /* Re-enable I/D caches */
1658 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1659 "or %%g1, %1, %%g1\n\t"
1660 "stxa %%g1, [%%g0] %0\n\t"
1661 "membar #Sync"
1662 : /* no outputs */
1663 : "i" (ASI_DCU_CONTROL_REG),
1664 "i" (DCU_IC | DCU_DC)
1665 : "g1");
1666
1667 if (flush_all)
1668 cheetah_flush_ecache();
1669 else if (flush_line)
1670 cheetah_flush_ecache_line(afar);
1671 }
1672
1673 /* Re-enable error reporting */
1674 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1675 "or %%g1, %1, %%g1\n\t"
1676 "stxa %%g1, [%%g0] %0\n\t"
1677 "membar #Sync"
1678 : /* no outputs */
1679 : "i" (ASI_ESTATE_ERROR_EN),
1680 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1681 : "g1");
1682
1683 /* Decide if we can continue after handling this trap and
1684 * logging the error.
1685 */
1686 recoverable = 1;
1687 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1688 recoverable = 0;
1689
1690 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1691 * error was logged while we had error reporting traps disabled.
1692 */
1693 if (cheetah_recheck_errors(&local_snapshot)) {
1694 unsigned long new_afsr = local_snapshot.afsr;
1695
1696 /* If we got a new asynchronous error, die... */
1697 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1698 CHAFSR_WDU | CHAFSR_CPU |
1699 CHAFSR_IVU | CHAFSR_UE |
1700 CHAFSR_BERR | CHAFSR_TO))
1701 recoverable = 0;
1702 }
1703
1704 /* Log errors. */
1705 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1706
1707 /* "Recoverable" here means we try to yank the page from ever
1708 * being newly used again. This depends upon a few things:
1709 * 1) Must be main memory, and AFAR must be valid.
1710 * 2) If we trapped from user, OK.
1711 * 3) Else, if we trapped from kernel we must find exception
1712 * table entry (ie. we have to have been accessing user
1713 * space).
1714 *
1715 * If AFAR is not in main memory, or we trapped from kernel
1716 * and cannot find an exception table entry, it is unacceptable
1717 * to try and continue.
1718 */
1719 if (recoverable && is_memory) {
1720 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1721 /* OK, usermode access. */
1722 recoverable = 1;
1723 } else {
1724 const struct exception_table_entry *entry;
1725
1726 entry = search_exception_tables(regs->tpc);
1727 if (entry) {
1728 /* OK, kernel access to userspace. */
1729 recoverable = 1;
1730
1731 } else {
1732 /* BAD, privileged state is corrupted. */
1733 recoverable = 0;
1734 }
1735
1736 if (recoverable) {
1737 if (pfn_valid(afar >> PAGE_SHIFT))
1738 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1739 else
1740 recoverable = 0;
1741
1742 /* Only perform fixup if we still have a
1743 * recoverable condition.
1744 */
1745 if (recoverable) {
1746 regs->tpc = entry->fixup;
1747 regs->tnpc = regs->tpc + 4;
1748 }
1749 }
1750 }
1751 } else {
1752 recoverable = 0;
1753 }
1754
1755 if (!recoverable)
1756 panic("Irrecoverable deferred error trap.\n");
1757}
1758
1759/* Handle a D/I cache parity error trap. TYPE is encoded as:
1760 *
1761 * Bit0: 0=dcache,1=icache
1762 * Bit1: 0=recoverable,1=unrecoverable
1763 *
1764 * The hardware has disabled both the I-cache and D-cache in
1765 * the %dcr register.
1766 */
1767void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1768{
1769 if (type & 0x1)
1770 __cheetah_flush_icache();
1771 else
1772 cheetah_plus_zap_dcache_parity();
1773 cheetah_flush_dcache();
1774
1775 /* Re-enable I-cache/D-cache */
1776 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1777 "or %%g1, %1, %%g1\n\t"
1778 "stxa %%g1, [%%g0] %0\n\t"
1779 "membar #Sync"
1780 : /* no outputs */
1781 : "i" (ASI_DCU_CONTROL_REG),
1782 "i" (DCU_DC | DCU_IC)
1783 : "g1");
1784
1785 if (type & 0x2) {
1786 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1787 smp_processor_id(),
1788 (type & 0x1) ? 'I' : 'D',
1789 regs->tpc);
1790 printk(KERN_EMERG "TPC<%pS>\n", (void *) regs->tpc);
1791 panic("Irrecoverable Cheetah+ parity error.");
1792 }
1793
1794 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1795 smp_processor_id(),
1796 (type & 0x1) ? 'I' : 'D',
1797 regs->tpc);
1798 printk(KERN_WARNING "TPC<%pS>\n", (void *) regs->tpc);
1799}
1800
1801struct sun4v_error_entry {
1802 /* Unique error handle */
1803/*0x00*/u64 err_handle;
1804
1805 /* %stick value at the time of the error */
1806/*0x08*/u64 err_stick;
1807
1808/*0x10*/u8 reserved_1[3];
1809
1810 /* Error type */
1811/*0x13*/u8 err_type;
1812#define SUN4V_ERR_TYPE_UNDEFINED 0
1813#define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1814#define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1815#define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1816#define SUN4V_ERR_TYPE_SHUTDOWN_RQST 4
1817#define SUN4V_ERR_TYPE_DUMP_CORE 5
1818#define SUN4V_ERR_TYPE_SP_STATE_CHANGE 6
1819#define SUN4V_ERR_TYPE_NUM 7
1820
1821 /* Error attributes */
1822/*0x14*/u32 err_attrs;
1823#define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1824#define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1825#define SUN4V_ERR_ATTRS_PIO 0x00000004
1826#define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1827#define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1828#define SUN4V_ERR_ATTRS_SHUTDOWN_RQST 0x00000020
1829#define SUN4V_ERR_ATTRS_ASR 0x00000040
1830#define SUN4V_ERR_ATTRS_ASI 0x00000080
1831#define SUN4V_ERR_ATTRS_PRIV_REG 0x00000100
1832#define SUN4V_ERR_ATTRS_SPSTATE_MSK 0x00000600
1833#define SUN4V_ERR_ATTRS_MCD 0x00000800
1834#define SUN4V_ERR_ATTRS_SPSTATE_SHFT 9
1835#define SUN4V_ERR_ATTRS_MODE_MSK 0x03000000
1836#define SUN4V_ERR_ATTRS_MODE_SHFT 24
1837#define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1838
1839#define SUN4V_ERR_SPSTATE_FAULTED 0
1840#define SUN4V_ERR_SPSTATE_AVAILABLE 1
1841#define SUN4V_ERR_SPSTATE_NOT_PRESENT 2
1842
1843#define SUN4V_ERR_MODE_USER 1
1844#define SUN4V_ERR_MODE_PRIV 2
1845
1846 /* Real address of the memory region or PIO transaction */
1847/*0x18*/u64 err_raddr;
1848
1849 /* Size of the operation triggering the error, in bytes */
1850/*0x20*/u32 err_size;
1851
1852 /* ID of the CPU */
1853/*0x24*/u16 err_cpu;
1854
1855 /* Grace periof for shutdown, in seconds */
1856/*0x26*/u16 err_secs;
1857
1858 /* Value of the %asi register */
1859/*0x28*/u8 err_asi;
1860
1861/*0x29*/u8 reserved_2;
1862
1863 /* Value of the ASR register number */
1864/*0x2a*/u16 err_asr;
1865#define SUN4V_ERR_ASR_VALID 0x8000
1866
1867/*0x2c*/u32 reserved_3;
1868/*0x30*/u64 reserved_4;
1869/*0x38*/u64 reserved_5;
1870};
1871
1872static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1873static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1874
1875static const char *sun4v_err_type_to_str(u8 type)
1876{
1877 static const char *types[SUN4V_ERR_TYPE_NUM] = {
1878 "undefined",
1879 "uncorrected resumable",
1880 "precise nonresumable",
1881 "deferred nonresumable",
1882 "shutdown request",
1883 "dump core",
1884 "SP state change",
1885 };
1886
1887 if (type < SUN4V_ERR_TYPE_NUM)
1888 return types[type];
1889
1890 return "unknown";
1891}
1892
1893static void sun4v_emit_err_attr_strings(u32 attrs)
1894{
1895 static const char *attr_names[] = {
1896 "processor",
1897 "memory",
1898 "PIO",
1899 "int-registers",
1900 "fpu-registers",
1901 "shutdown-request",
1902 "ASR",
1903 "ASI",
1904 "priv-reg",
1905 };
1906 static const char *sp_states[] = {
1907 "sp-faulted",
1908 "sp-available",
1909 "sp-not-present",
1910 "sp-state-reserved",
1911 };
1912 static const char *modes[] = {
1913 "mode-reserved0",
1914 "user",
1915 "priv",
1916 "mode-reserved1",
1917 };
1918 u32 sp_state, mode;
1919 int i;
1920
1921 for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
1922 if (attrs & (1U << i)) {
1923 const char *s = attr_names[i];
1924
1925 pr_cont("%s ", s);
1926 }
1927 }
1928
1929 sp_state = ((attrs & SUN4V_ERR_ATTRS_SPSTATE_MSK) >>
1930 SUN4V_ERR_ATTRS_SPSTATE_SHFT);
1931 pr_cont("%s ", sp_states[sp_state]);
1932
1933 mode = ((attrs & SUN4V_ERR_ATTRS_MODE_MSK) >>
1934 SUN4V_ERR_ATTRS_MODE_SHFT);
1935 pr_cont("%s ", modes[mode]);
1936
1937 if (attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL)
1938 pr_cont("res-queue-full ");
1939}
1940
1941/* When the report contains a real-address of "-1" it means that the
1942 * hardware did not provide the address. So we compute the effective
1943 * address of the load or store instruction at regs->tpc and report
1944 * that. Usually when this happens it's a PIO and in such a case we
1945 * are using physical addresses with bypass ASIs anyways, so what we
1946 * report here is exactly what we want.
1947 */
1948static void sun4v_report_real_raddr(const char *pfx, struct pt_regs *regs)
1949{
1950 unsigned int insn;
1951 u64 addr;
1952
1953 if (!(regs->tstate & TSTATE_PRIV))
1954 return;
1955
1956 insn = *(unsigned int *) regs->tpc;
1957
1958 addr = compute_effective_address(regs, insn, 0);
1959
1960 printk("%s: insn effective address [0x%016llx]\n",
1961 pfx, addr);
1962}
1963
1964static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent,
1965 int cpu, const char *pfx, atomic_t *ocnt)
1966{
1967 u64 *raw_ptr = (u64 *) ent;
1968 u32 attrs;
1969 int cnt;
1970
1971 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1972 printk("%s: TPC [0x%016lx] <%pS>\n",
1973 pfx, regs->tpc, (void *) regs->tpc);
1974
1975 printk("%s: RAW [%016llx:%016llx:%016llx:%016llx\n",
1976 pfx, raw_ptr[0], raw_ptr[1], raw_ptr[2], raw_ptr[3]);
1977 printk("%s: %016llx:%016llx:%016llx:%016llx]\n",
1978 pfx, raw_ptr[4], raw_ptr[5], raw_ptr[6], raw_ptr[7]);
1979
1980 printk("%s: handle [0x%016llx] stick [0x%016llx]\n",
1981 pfx, ent->err_handle, ent->err_stick);
1982
1983 printk("%s: type [%s]\n", pfx, sun4v_err_type_to_str(ent->err_type));
1984
1985 attrs = ent->err_attrs;
1986 printk("%s: attrs [0x%08x] < ", pfx, attrs);
1987 sun4v_emit_err_attr_strings(attrs);
1988 pr_cont(">\n");
1989
1990 /* Various fields in the error report are only valid if
1991 * certain attribute bits are set.
1992 */
1993 if (attrs & (SUN4V_ERR_ATTRS_MEMORY |
1994 SUN4V_ERR_ATTRS_PIO |
1995 SUN4V_ERR_ATTRS_ASI)) {
1996 printk("%s: raddr [0x%016llx]\n", pfx, ent->err_raddr);
1997
1998 if (ent->err_raddr == ~(u64)0)
1999 sun4v_report_real_raddr(pfx, regs);
2000 }
2001
2002 if (attrs & (SUN4V_ERR_ATTRS_MEMORY | SUN4V_ERR_ATTRS_ASI))
2003 printk("%s: size [0x%x]\n", pfx, ent->err_size);
2004
2005 if (attrs & (SUN4V_ERR_ATTRS_PROCESSOR |
2006 SUN4V_ERR_ATTRS_INT_REGISTERS |
2007 SUN4V_ERR_ATTRS_FPU_REGISTERS |
2008 SUN4V_ERR_ATTRS_PRIV_REG))
2009 printk("%s: cpu[%u]\n", pfx, ent->err_cpu);
2010
2011 if (attrs & SUN4V_ERR_ATTRS_ASI)
2012 printk("%s: asi [0x%02x]\n", pfx, ent->err_asi);
2013
2014 if ((attrs & (SUN4V_ERR_ATTRS_INT_REGISTERS |
2015 SUN4V_ERR_ATTRS_FPU_REGISTERS |
2016 SUN4V_ERR_ATTRS_PRIV_REG)) &&
2017 (ent->err_asr & SUN4V_ERR_ASR_VALID) != 0)
2018 printk("%s: reg [0x%04x]\n",
2019 pfx, ent->err_asr & ~SUN4V_ERR_ASR_VALID);
2020
2021 show_regs(regs);
2022
2023 if ((cnt = atomic_read(ocnt)) != 0) {
2024 atomic_set(ocnt, 0);
2025 wmb();
2026 printk("%s: Queue overflowed %d times.\n",
2027 pfx, cnt);
2028 }
2029}
2030
2031/* Handle memory corruption detected error which is vectored in
2032 * through resumable error trap.
2033 */
2034void do_mcd_err(struct pt_regs *regs, struct sun4v_error_entry ent)
2035{
2036 if (notify_die(DIE_TRAP, "MCD error", regs, 0, 0x34,
2037 SIGSEGV) == NOTIFY_STOP)
2038 return;
2039
2040 if (regs->tstate & TSTATE_PRIV) {
2041 /* MCD exception could happen because the task was
2042 * running a system call with MCD enabled and passed a
2043 * non-versioned pointer or pointer with bad version
2044 * tag to the system call. In such cases, hypervisor
2045 * places the address of offending instruction in the
2046 * resumable error report. This is a deferred error,
2047 * so the read/write that caused the trap was potentially
2048 * retired long time back and we may have no choice
2049 * but to send SIGSEGV to the process.
2050 */
2051 const struct exception_table_entry *entry;
2052
2053 entry = search_exception_tables(regs->tpc);
2054 if (entry) {
2055 /* Looks like a bad syscall parameter */
2056#ifdef DEBUG_EXCEPTIONS
2057 pr_emerg("Exception: PC<%016lx> faddr<UNKNOWN>\n",
2058 regs->tpc);
2059 pr_emerg("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
2060 ent.err_raddr, entry->fixup);
2061#endif
2062 regs->tpc = entry->fixup;
2063 regs->tnpc = regs->tpc + 4;
2064 return;
2065 }
2066 }
2067
2068 /* Send SIGSEGV to the userspace process with the right signal
2069 * code
2070 */
2071 force_sig_fault(SIGSEGV, SEGV_ADIDERR, (void __user *)ent.err_raddr);
2072}
2073
2074/* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
2075 * Log the event and clear the first word of the entry.
2076 */
2077void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
2078{
2079 enum ctx_state prev_state = exception_enter();
2080 struct sun4v_error_entry *ent, local_copy;
2081 struct trap_per_cpu *tb;
2082 unsigned long paddr;
2083 int cpu;
2084
2085 cpu = get_cpu();
2086
2087 tb = &trap_block[cpu];
2088 paddr = tb->resum_kernel_buf_pa + offset;
2089 ent = __va(paddr);
2090
2091 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
2092
2093 /* We have a local copy now, so release the entry. */
2094 ent->err_handle = 0;
2095 wmb();
2096
2097 put_cpu();
2098
2099 if (local_copy.err_type == SUN4V_ERR_TYPE_SHUTDOWN_RQST) {
2100 /* We should really take the seconds field of
2101 * the error report and use it for the shutdown
2102 * invocation, but for now do the same thing we
2103 * do for a DS shutdown request.
2104 */
2105 pr_info("Shutdown request, %u seconds...\n",
2106 local_copy.err_secs);
2107 orderly_poweroff(true);
2108 goto out;
2109 }
2110
2111 /* If this is a memory corruption detected error vectored in
2112 * by HV through resumable error trap, call the handler
2113 */
2114 if (local_copy.err_attrs & SUN4V_ERR_ATTRS_MCD) {
2115 do_mcd_err(regs, local_copy);
2116 return;
2117 }
2118
2119 sun4v_log_error(regs, &local_copy, cpu,
2120 KERN_ERR "RESUMABLE ERROR",
2121 &sun4v_resum_oflow_cnt);
2122out:
2123 exception_exit(prev_state);
2124}
2125
2126/* If we try to printk() we'll probably make matters worse, by trying
2127 * to retake locks this cpu already holds or causing more errors. So
2128 * just bump a counter, and we'll report these counter bumps above.
2129 */
2130void sun4v_resum_overflow(struct pt_regs *regs)
2131{
2132 atomic_inc(&sun4v_resum_oflow_cnt);
2133}
2134
2135/* Given a set of registers, get the virtual addressi that was being accessed
2136 * by the faulting instructions at tpc.
2137 */
2138static unsigned long sun4v_get_vaddr(struct pt_regs *regs)
2139{
2140 unsigned int insn;
2141
2142 if (!copy_from_user(&insn, (void __user *)regs->tpc, 4)) {
2143 return compute_effective_address(regs, insn,
2144 (insn >> 25) & 0x1f);
2145 }
2146 return 0;
2147}
2148
2149/* Attempt to handle non-resumable errors generated from userspace.
2150 * Returns true if the signal was handled, false otherwise.
2151 */
2152bool sun4v_nonresum_error_user_handled(struct pt_regs *regs,
2153 struct sun4v_error_entry *ent) {
2154
2155 unsigned int attrs = ent->err_attrs;
2156
2157 if (attrs & SUN4V_ERR_ATTRS_MEMORY) {
2158 unsigned long addr = ent->err_raddr;
2159
2160 if (addr == ~(u64)0) {
2161 /* This seems highly unlikely to ever occur */
2162 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Memory error detected in unknown location!\n");
2163 } else {
2164 unsigned long page_cnt = DIV_ROUND_UP(ent->err_size,
2165 PAGE_SIZE);
2166
2167 /* Break the unfortunate news. */
2168 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Memory failed at %016lX\n",
2169 addr);
2170 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Claiming %lu ages.\n",
2171 page_cnt);
2172
2173 while (page_cnt-- > 0) {
2174 if (pfn_valid(addr >> PAGE_SHIFT))
2175 get_page(pfn_to_page(addr >> PAGE_SHIFT));
2176 addr += PAGE_SIZE;
2177 }
2178 }
2179 force_sig(SIGKILL);
2180
2181 return true;
2182 }
2183 if (attrs & SUN4V_ERR_ATTRS_PIO) {
2184 force_sig_fault(SIGBUS, BUS_ADRERR,
2185 (void __user *)sun4v_get_vaddr(regs));
2186 return true;
2187 }
2188
2189 /* Default to doing nothing */
2190 return false;
2191}
2192
2193/* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
2194 * Log the event, clear the first word of the entry, and die.
2195 */
2196void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
2197{
2198 struct sun4v_error_entry *ent, local_copy;
2199 struct trap_per_cpu *tb;
2200 unsigned long paddr;
2201 int cpu;
2202
2203 cpu = get_cpu();
2204
2205 tb = &trap_block[cpu];
2206 paddr = tb->nonresum_kernel_buf_pa + offset;
2207 ent = __va(paddr);
2208
2209 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
2210
2211 /* We have a local copy now, so release the entry. */
2212 ent->err_handle = 0;
2213 wmb();
2214
2215 put_cpu();
2216
2217 if (!(regs->tstate & TSTATE_PRIV) &&
2218 sun4v_nonresum_error_user_handled(regs, &local_copy)) {
2219 /* DON'T PANIC: This userspace error was handled. */
2220 return;
2221 }
2222
2223#ifdef CONFIG_PCI
2224 /* Check for the special PCI poke sequence. */
2225 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
2226 pci_poke_faulted = 1;
2227 regs->tpc += 4;
2228 regs->tnpc = regs->tpc + 4;
2229 return;
2230 }
2231#endif
2232
2233 sun4v_log_error(regs, &local_copy, cpu,
2234 KERN_EMERG "NON-RESUMABLE ERROR",
2235 &sun4v_nonresum_oflow_cnt);
2236
2237 panic("Non-resumable error.");
2238}
2239
2240/* If we try to printk() we'll probably make matters worse, by trying
2241 * to retake locks this cpu already holds or causing more errors. So
2242 * just bump a counter, and we'll report these counter bumps above.
2243 */
2244void sun4v_nonresum_overflow(struct pt_regs *regs)
2245{
2246 /* XXX Actually even this can make not that much sense. Perhaps
2247 * XXX we should just pull the plug and panic directly from here?
2248 */
2249 atomic_inc(&sun4v_nonresum_oflow_cnt);
2250}
2251
2252static void sun4v_tlb_error(struct pt_regs *regs)
2253{
2254 die_if_kernel("TLB/TSB error", regs);
2255}
2256
2257unsigned long sun4v_err_itlb_vaddr;
2258unsigned long sun4v_err_itlb_ctx;
2259unsigned long sun4v_err_itlb_pte;
2260unsigned long sun4v_err_itlb_error;
2261
2262void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
2263{
2264 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2265
2266 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
2267 regs->tpc, tl);
2268 printk(KERN_EMERG "SUN4V-ITLB: TPC<%pS>\n", (void *) regs->tpc);
2269 printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
2270 printk(KERN_EMERG "SUN4V-ITLB: O7<%pS>\n",
2271 (void *) regs->u_regs[UREG_I7]);
2272 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
2273 "pte[%lx] error[%lx]\n",
2274 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
2275 sun4v_err_itlb_pte, sun4v_err_itlb_error);
2276
2277 sun4v_tlb_error(regs);
2278}
2279
2280unsigned long sun4v_err_dtlb_vaddr;
2281unsigned long sun4v_err_dtlb_ctx;
2282unsigned long sun4v_err_dtlb_pte;
2283unsigned long sun4v_err_dtlb_error;
2284
2285void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
2286{
2287 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2288
2289 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
2290 regs->tpc, tl);
2291 printk(KERN_EMERG "SUN4V-DTLB: TPC<%pS>\n", (void *) regs->tpc);
2292 printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
2293 printk(KERN_EMERG "SUN4V-DTLB: O7<%pS>\n",
2294 (void *) regs->u_regs[UREG_I7]);
2295 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
2296 "pte[%lx] error[%lx]\n",
2297 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
2298 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
2299
2300 sun4v_tlb_error(regs);
2301}
2302
2303void hypervisor_tlbop_error(unsigned long err, unsigned long op)
2304{
2305 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
2306 err, op);
2307}
2308
2309void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
2310{
2311 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
2312 err, op);
2313}
2314
2315static void do_fpe_common(struct pt_regs *regs)
2316{
2317 if (regs->tstate & TSTATE_PRIV) {
2318 regs->tpc = regs->tnpc;
2319 regs->tnpc += 4;
2320 } else {
2321 unsigned long fsr = current_thread_info()->xfsr[0];
2322 int code;
2323
2324 if (test_thread_flag(TIF_32BIT)) {
2325 regs->tpc &= 0xffffffff;
2326 regs->tnpc &= 0xffffffff;
2327 }
2328 code = FPE_FLTUNK;
2329 if ((fsr & 0x1c000) == (1 << 14)) {
2330 if (fsr & 0x10)
2331 code = FPE_FLTINV;
2332 else if (fsr & 0x08)
2333 code = FPE_FLTOVF;
2334 else if (fsr & 0x04)
2335 code = FPE_FLTUND;
2336 else if (fsr & 0x02)
2337 code = FPE_FLTDIV;
2338 else if (fsr & 0x01)
2339 code = FPE_FLTRES;
2340 }
2341 force_sig_fault(SIGFPE, code, (void __user *)regs->tpc);
2342 }
2343}
2344
2345void do_fpieee(struct pt_regs *regs)
2346{
2347 enum ctx_state prev_state = exception_enter();
2348
2349 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2350 0, 0x24, SIGFPE) == NOTIFY_STOP)
2351 goto out;
2352
2353 do_fpe_common(regs);
2354out:
2355 exception_exit(prev_state);
2356}
2357
2358void do_fpother(struct pt_regs *regs)
2359{
2360 enum ctx_state prev_state = exception_enter();
2361 struct fpustate *f = FPUSTATE;
2362 int ret = 0;
2363
2364 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2365 0, 0x25, SIGFPE) == NOTIFY_STOP)
2366 goto out;
2367
2368 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2369 case (2 << 14): /* unfinished_FPop */
2370 case (3 << 14): /* unimplemented_FPop */
2371 ret = do_mathemu(regs, f, false);
2372 break;
2373 }
2374 if (ret)
2375 goto out;
2376 do_fpe_common(regs);
2377out:
2378 exception_exit(prev_state);
2379}
2380
2381void do_tof(struct pt_regs *regs)
2382{
2383 enum ctx_state prev_state = exception_enter();
2384
2385 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2386 0, 0x26, SIGEMT) == NOTIFY_STOP)
2387 goto out;
2388
2389 if (regs->tstate & TSTATE_PRIV)
2390 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2391 if (test_thread_flag(TIF_32BIT)) {
2392 regs->tpc &= 0xffffffff;
2393 regs->tnpc &= 0xffffffff;
2394 }
2395 force_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)regs->tpc);
2396out:
2397 exception_exit(prev_state);
2398}
2399
2400void do_div0(struct pt_regs *regs)
2401{
2402 enum ctx_state prev_state = exception_enter();
2403
2404 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2405 0, 0x28, SIGFPE) == NOTIFY_STOP)
2406 goto out;
2407
2408 if (regs->tstate & TSTATE_PRIV)
2409 die_if_kernel("TL0: Kernel divide by zero.", regs);
2410 if (test_thread_flag(TIF_32BIT)) {
2411 regs->tpc &= 0xffffffff;
2412 regs->tnpc &= 0xffffffff;
2413 }
2414 force_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)regs->tpc);
2415out:
2416 exception_exit(prev_state);
2417}
2418
2419static void instruction_dump(unsigned int *pc)
2420{
2421 int i;
2422
2423 if ((((unsigned long) pc) & 3))
2424 return;
2425
2426 printk("Instruction DUMP:");
2427 for (i = -3; i < 6; i++)
2428 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2429 printk("\n");
2430}
2431
2432static void user_instruction_dump(unsigned int __user *pc)
2433{
2434 int i;
2435 unsigned int buf[9];
2436
2437 if ((((unsigned long) pc) & 3))
2438 return;
2439
2440 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2441 return;
2442
2443 printk("Instruction DUMP:");
2444 for (i = 0; i < 9; i++)
2445 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2446 printk("\n");
2447}
2448
2449void show_stack(struct task_struct *tsk, unsigned long *_ksp, const char *loglvl)
2450{
2451 unsigned long fp, ksp;
2452 struct thread_info *tp;
2453 int count = 0;
2454#ifdef CONFIG_FUNCTION_GRAPH_TRACER
2455 int graph = 0;
2456#endif
2457
2458 ksp = (unsigned long) _ksp;
2459 if (!tsk)
2460 tsk = current;
2461 tp = task_thread_info(tsk);
2462 if (ksp == 0UL) {
2463 if (tsk == current)
2464 asm("mov %%fp, %0" : "=r" (ksp));
2465 else
2466 ksp = tp->ksp;
2467 }
2468 if (tp == current_thread_info())
2469 flushw_all();
2470
2471 fp = ksp + STACK_BIAS;
2472
2473 printk("%sCall Trace:\n", loglvl);
2474 do {
2475 struct sparc_stackf *sf;
2476 struct pt_regs *regs;
2477 unsigned long pc;
2478
2479 if (!kstack_valid(tp, fp))
2480 break;
2481 sf = (struct sparc_stackf *) fp;
2482 regs = (struct pt_regs *) (sf + 1);
2483
2484 if (kstack_is_trap_frame(tp, regs)) {
2485 if (!(regs->tstate & TSTATE_PRIV))
2486 break;
2487 pc = regs->tpc;
2488 fp = regs->u_regs[UREG_I6] + STACK_BIAS;
2489 } else {
2490 pc = sf->callers_pc;
2491 fp = (unsigned long)sf->fp + STACK_BIAS;
2492 }
2493
2494 print_ip_sym(loglvl, pc);
2495#ifdef CONFIG_FUNCTION_GRAPH_TRACER
2496 if ((pc + 8UL) == (unsigned long) &return_to_handler) {
2497 struct ftrace_ret_stack *ret_stack;
2498 ret_stack = ftrace_graph_get_ret_stack(tsk, graph);
2499 if (ret_stack) {
2500 pc = ret_stack->ret;
2501 print_ip_sym(loglvl, pc);
2502 graph++;
2503 }
2504 }
2505#endif
2506 } while (++count < 16);
2507}
2508
2509static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2510{
2511 unsigned long fp = rw->ins[6];
2512
2513 if (!fp)
2514 return NULL;
2515
2516 return (struct reg_window *) (fp + STACK_BIAS);
2517}
2518
2519void __noreturn die_if_kernel(char *str, struct pt_regs *regs)
2520{
2521 static int die_counter;
2522 int count = 0;
2523
2524 /* Amuse the user. */
2525 printk(
2526" \\|/ ____ \\|/\n"
2527" \"@'/ .. \\`@\"\n"
2528" /_| \\__/ |_\\\n"
2529" \\__U_/\n");
2530
2531 printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
2532 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2533 __asm__ __volatile__("flushw");
2534 show_regs(regs);
2535 add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
2536 if (regs->tstate & TSTATE_PRIV) {
2537 struct thread_info *tp = current_thread_info();
2538 struct reg_window *rw = (struct reg_window *)
2539 (regs->u_regs[UREG_FP] + STACK_BIAS);
2540
2541 /* Stop the back trace when we hit userland or we
2542 * find some badly aligned kernel stack.
2543 */
2544 while (rw &&
2545 count++ < 30 &&
2546 kstack_valid(tp, (unsigned long) rw)) {
2547 printk("Caller[%016lx]: %pS\n", rw->ins[7],
2548 (void *) rw->ins[7]);
2549
2550 rw = kernel_stack_up(rw);
2551 }
2552 instruction_dump ((unsigned int *) regs->tpc);
2553 } else {
2554 if (test_thread_flag(TIF_32BIT)) {
2555 regs->tpc &= 0xffffffff;
2556 regs->tnpc &= 0xffffffff;
2557 }
2558 user_instruction_dump ((unsigned int __user *) regs->tpc);
2559 }
2560 if (panic_on_oops)
2561 panic("Fatal exception");
2562 make_task_dead((regs->tstate & TSTATE_PRIV)? SIGKILL : SIGSEGV);
2563}
2564EXPORT_SYMBOL(die_if_kernel);
2565
2566#define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2567#define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2568
2569void do_illegal_instruction(struct pt_regs *regs)
2570{
2571 enum ctx_state prev_state = exception_enter();
2572 unsigned long pc = regs->tpc;
2573 unsigned long tstate = regs->tstate;
2574 u32 insn;
2575
2576 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2577 0, 0x10, SIGILL) == NOTIFY_STOP)
2578 goto out;
2579
2580 if (tstate & TSTATE_PRIV)
2581 die_if_kernel("Kernel illegal instruction", regs);
2582 if (test_thread_flag(TIF_32BIT))
2583 pc = (u32)pc;
2584 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2585 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2586 if (handle_popc(insn, regs))
2587 goto out;
2588 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2589 if (handle_ldf_stq(insn, regs))
2590 goto out;
2591 } else if (tlb_type == hypervisor) {
2592 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2593 if (!vis_emul(regs, insn))
2594 goto out;
2595 } else {
2596 struct fpustate *f = FPUSTATE;
2597
2598 /* On UltraSPARC T2 and later, FPU insns which
2599 * are not implemented in HW signal an illegal
2600 * instruction trap and do not set the FP Trap
2601 * Trap in the %fsr to unimplemented_FPop.
2602 */
2603 if (do_mathemu(regs, f, true))
2604 goto out;
2605 }
2606 }
2607 }
2608 force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc);
2609out:
2610 exception_exit(prev_state);
2611}
2612
2613void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2614{
2615 enum ctx_state prev_state = exception_enter();
2616
2617 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2618 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2619 goto out;
2620
2621 if (regs->tstate & TSTATE_PRIV) {
2622 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2623 goto out;
2624 }
2625 if (is_no_fault_exception(regs))
2626 return;
2627
2628 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)sfar);
2629out:
2630 exception_exit(prev_state);
2631}
2632
2633void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2634{
2635 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2636 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2637 return;
2638
2639 if (regs->tstate & TSTATE_PRIV) {
2640 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2641 return;
2642 }
2643 if (is_no_fault_exception(regs))
2644 return;
2645
2646 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) addr);
2647}
2648
2649/* sun4v_mem_corrupt_detect_precise() - Handle precise exception on an ADI
2650 * tag mismatch.
2651 *
2652 * ADI version tag mismatch on a load from memory always results in a
2653 * precise exception. Tag mismatch on a store to memory will result in
2654 * precise exception if MCDPER or PMCDPER is set to 1.
2655 */
2656void sun4v_mem_corrupt_detect_precise(struct pt_regs *regs, unsigned long addr,
2657 unsigned long context)
2658{
2659 if (notify_die(DIE_TRAP, "memory corruption precise exception", regs,
2660 0, 0x8, SIGSEGV) == NOTIFY_STOP)
2661 return;
2662
2663 if (regs->tstate & TSTATE_PRIV) {
2664 /* MCD exception could happen because the task was running
2665 * a system call with MCD enabled and passed a non-versioned
2666 * pointer or pointer with bad version tag to the system
2667 * call.
2668 */
2669 const struct exception_table_entry *entry;
2670
2671 entry = search_exception_tables(regs->tpc);
2672 if (entry) {
2673 /* Looks like a bad syscall parameter */
2674#ifdef DEBUG_EXCEPTIONS
2675 pr_emerg("Exception: PC<%016lx> faddr<UNKNOWN>\n",
2676 regs->tpc);
2677 pr_emerg("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
2678 regs->tpc, entry->fixup);
2679#endif
2680 regs->tpc = entry->fixup;
2681 regs->tnpc = regs->tpc + 4;
2682 return;
2683 }
2684 pr_emerg("%s: ADDR[%016lx] CTX[%lx], going.\n",
2685 __func__, addr, context);
2686 die_if_kernel("MCD precise", regs);
2687 }
2688
2689 if (test_thread_flag(TIF_32BIT)) {
2690 regs->tpc &= 0xffffffff;
2691 regs->tnpc &= 0xffffffff;
2692 }
2693 force_sig_fault(SIGSEGV, SEGV_ADIPERR, (void __user *)addr);
2694}
2695
2696void do_privop(struct pt_regs *regs)
2697{
2698 enum ctx_state prev_state = exception_enter();
2699
2700 if (notify_die(DIE_TRAP, "privileged operation", regs,
2701 0, 0x11, SIGILL) == NOTIFY_STOP)
2702 goto out;
2703
2704 if (test_thread_flag(TIF_32BIT)) {
2705 regs->tpc &= 0xffffffff;
2706 regs->tnpc &= 0xffffffff;
2707 }
2708 force_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)regs->tpc);
2709out:
2710 exception_exit(prev_state);
2711}
2712
2713void do_privact(struct pt_regs *regs)
2714{
2715 do_privop(regs);
2716}
2717
2718/* Trap level 1 stuff or other traps we should never see... */
2719void do_cee(struct pt_regs *regs)
2720{
2721 exception_enter();
2722 die_if_kernel("TL0: Cache Error Exception", regs);
2723}
2724
2725void do_div0_tl1(struct pt_regs *regs)
2726{
2727 exception_enter();
2728 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2729 die_if_kernel("TL1: DIV0 Exception", regs);
2730}
2731
2732void do_fpieee_tl1(struct pt_regs *regs)
2733{
2734 exception_enter();
2735 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2736 die_if_kernel("TL1: FPU IEEE Exception", regs);
2737}
2738
2739void do_fpother_tl1(struct pt_regs *regs)
2740{
2741 exception_enter();
2742 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2743 die_if_kernel("TL1: FPU Other Exception", regs);
2744}
2745
2746void do_ill_tl1(struct pt_regs *regs)
2747{
2748 exception_enter();
2749 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2750 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2751}
2752
2753void do_irq_tl1(struct pt_regs *regs)
2754{
2755 exception_enter();
2756 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2757 die_if_kernel("TL1: IRQ Exception", regs);
2758}
2759
2760void do_lddfmna_tl1(struct pt_regs *regs)
2761{
2762 exception_enter();
2763 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2764 die_if_kernel("TL1: LDDF Exception", regs);
2765}
2766
2767void do_stdfmna_tl1(struct pt_regs *regs)
2768{
2769 exception_enter();
2770 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2771 die_if_kernel("TL1: STDF Exception", regs);
2772}
2773
2774void do_paw(struct pt_regs *regs)
2775{
2776 exception_enter();
2777 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2778}
2779
2780void do_paw_tl1(struct pt_regs *regs)
2781{
2782 exception_enter();
2783 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2784 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2785}
2786
2787void do_vaw(struct pt_regs *regs)
2788{
2789 exception_enter();
2790 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2791}
2792
2793void do_vaw_tl1(struct pt_regs *regs)
2794{
2795 exception_enter();
2796 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2797 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2798}
2799
2800void do_tof_tl1(struct pt_regs *regs)
2801{
2802 exception_enter();
2803 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2804 die_if_kernel("TL1: Tag Overflow Exception", regs);
2805}
2806
2807void do_getpsr(struct pt_regs *regs)
2808{
2809 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2810 regs->tpc = regs->tnpc;
2811 regs->tnpc += 4;
2812 if (test_thread_flag(TIF_32BIT)) {
2813 regs->tpc &= 0xffffffff;
2814 regs->tnpc &= 0xffffffff;
2815 }
2816}
2817
2818u64 cpu_mondo_counter[NR_CPUS] = {0};
2819struct trap_per_cpu trap_block[NR_CPUS];
2820EXPORT_SYMBOL(trap_block);
2821
2822/* This can get invoked before sched_init() so play it super safe
2823 * and use hard_smp_processor_id().
2824 */
2825void notrace init_cur_cpu_trap(struct thread_info *t)
2826{
2827 int cpu = hard_smp_processor_id();
2828 struct trap_per_cpu *p = &trap_block[cpu];
2829
2830 p->thread = t;
2831 p->pgd_paddr = 0;
2832}
2833
2834extern void thread_info_offsets_are_bolixed_dave(void);
2835extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2836extern void tsb_config_offsets_are_bolixed_dave(void);
2837
2838/* Only invoked on boot processor. */
2839void __init trap_init(void)
2840{
2841 /* Compile time sanity check. */
2842 BUILD_BUG_ON(TI_TASK != offsetof(struct thread_info, task) ||
2843 TI_FLAGS != offsetof(struct thread_info, flags) ||
2844 TI_CPU != offsetof(struct thread_info, cpu) ||
2845 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2846 TI_KSP != offsetof(struct thread_info, ksp) ||
2847 TI_FAULT_ADDR != offsetof(struct thread_info,
2848 fault_address) ||
2849 TI_KREGS != offsetof(struct thread_info, kregs) ||
2850 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2851 TI_REG_WINDOW != offsetof(struct thread_info,
2852 reg_window) ||
2853 TI_RWIN_SPTRS != offsetof(struct thread_info,
2854 rwbuf_stkptrs) ||
2855 TI_GSR != offsetof(struct thread_info, gsr) ||
2856 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2857 TI_PRE_COUNT != offsetof(struct thread_info,
2858 preempt_count) ||
2859 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2860 TI_KUNA_REGS != offsetof(struct thread_info,
2861 kern_una_regs) ||
2862 TI_KUNA_INSN != offsetof(struct thread_info,
2863 kern_una_insn) ||
2864 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2865 (TI_FPREGS & (64 - 1)));
2866
2867 BUILD_BUG_ON(TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu,
2868 thread) ||
2869 (TRAP_PER_CPU_PGD_PADDR !=
2870 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2871 (TRAP_PER_CPU_CPU_MONDO_PA !=
2872 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2873 (TRAP_PER_CPU_DEV_MONDO_PA !=
2874 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2875 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2876 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2877 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2878 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2879 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2880 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2881 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2882 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2883 (TRAP_PER_CPU_FAULT_INFO !=
2884 offsetof(struct trap_per_cpu, fault_info)) ||
2885 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2886 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2887 (TRAP_PER_CPU_CPU_LIST_PA !=
2888 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2889 (TRAP_PER_CPU_TSB_HUGE !=
2890 offsetof(struct trap_per_cpu, tsb_huge)) ||
2891 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2892 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2893 (TRAP_PER_CPU_IRQ_WORKLIST_PA !=
2894 offsetof(struct trap_per_cpu, irq_worklist_pa)) ||
2895 (TRAP_PER_CPU_CPU_MONDO_QMASK !=
2896 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) ||
2897 (TRAP_PER_CPU_DEV_MONDO_QMASK !=
2898 offsetof(struct trap_per_cpu, dev_mondo_qmask)) ||
2899 (TRAP_PER_CPU_RESUM_QMASK !=
2900 offsetof(struct trap_per_cpu, resum_qmask)) ||
2901 (TRAP_PER_CPU_NONRESUM_QMASK !=
2902 offsetof(struct trap_per_cpu, nonresum_qmask)) ||
2903 (TRAP_PER_CPU_PER_CPU_BASE !=
2904 offsetof(struct trap_per_cpu, __per_cpu_base)));
2905
2906 BUILD_BUG_ON((TSB_CONFIG_TSB !=
2907 offsetof(struct tsb_config, tsb)) ||
2908 (TSB_CONFIG_RSS_LIMIT !=
2909 offsetof(struct tsb_config, tsb_rss_limit)) ||
2910 (TSB_CONFIG_NENTRIES !=
2911 offsetof(struct tsb_config, tsb_nentries)) ||
2912 (TSB_CONFIG_REG_VAL !=
2913 offsetof(struct tsb_config, tsb_reg_val)) ||
2914 (TSB_CONFIG_MAP_VADDR !=
2915 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2916 (TSB_CONFIG_MAP_PTE !=
2917 offsetof(struct tsb_config, tsb_map_pte)));
2918
2919 /* Attach to the address space of init_task. On SMP we
2920 * do this in smp.c:smp_callin for other cpus.
2921 */
2922 mmgrab(&init_mm);
2923 current->active_mm = &init_mm;
2924}