1 /* arch/sparc64/kernel/traps.c
3 * Copyright (C) 1995,1997,2008,2009 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com)
8 * I like traps on v9, :))))
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>
18 #include <linux/init.h>
19 #include <linux/kdebug.h>
22 #include <asm/delay.h>
23 #include <asm/system.h>
24 #include <asm/ptrace.h>
25 #include <asm/oplib.h>
27 #include <asm/pgtable.h>
28 #include <asm/unistd.h>
29 #include <asm/uaccess.h>
30 #include <asm/fpumacro.h>
33 #include <asm/estate.h>
34 #include <asm/chafsr.h>
35 #include <asm/sfafsr.h>
36 #include <asm/psrcompat.h>
37 #include <asm/processor.h>
38 #include <asm/timer.h>
41 #include <asm/memctrl.h>
46 /* When an irrecoverable trap occurs at tl > 0, the trap entry
47 * code logs the trap state registers at every level in the trap
48 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
61 static void dump_tl1_traplog(struct tl1_traplog *p)
65 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
66 "dumping track stack.\n", p->tl);
68 limit = (tlb_type == hypervisor) ? 2 : 4;
69 for (i = 0; i < limit; i++) {
71 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
72 "TNPC[%016lx] TT[%lx]\n",
74 p->trapstack[i].tstate, p->trapstack[i].tpc,
75 p->trapstack[i].tnpc, p->trapstack[i].tt);
76 printk("TRAPLOG: TPC<%pS>\n", (void *) p->trapstack[i].tpc);
80 void bad_trap(struct pt_regs *regs, long lvl)
85 if (notify_die(DIE_TRAP, "bad trap", regs,
86 0, lvl, SIGTRAP) == NOTIFY_STOP)
90 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
91 die_if_kernel(buffer, regs);
95 if (regs->tstate & TSTATE_PRIV) {
96 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
97 die_if_kernel(buffer, regs);
99 if (test_thread_flag(TIF_32BIT)) {
100 regs->tpc &= 0xffffffff;
101 regs->tnpc &= 0xffffffff;
103 info.si_signo = SIGILL;
105 info.si_code = ILL_ILLTRP;
106 info.si_addr = (void __user *)regs->tpc;
107 info.si_trapno = lvl;
108 force_sig_info(SIGILL, &info, current);
111 void bad_trap_tl1(struct pt_regs *regs, long lvl)
115 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
116 0, lvl, SIGTRAP) == NOTIFY_STOP)
119 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
121 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
122 die_if_kernel (buffer, regs);
125 #ifdef CONFIG_DEBUG_BUGVERBOSE
126 void do_BUG(const char *file, int line)
129 printk("kernel BUG at %s:%d!\n", file, line);
131 EXPORT_SYMBOL(do_BUG);
134 static DEFINE_SPINLOCK(dimm_handler_lock);
135 static dimm_printer_t dimm_handler;
137 static int sprintf_dimm(int synd_code, unsigned long paddr, char *buf, int buflen)
142 spin_lock_irqsave(&dimm_handler_lock, flags);
144 ret = dimm_handler(synd_code, paddr, buf, buflen);
145 } else if (tlb_type == spitfire) {
146 if (prom_getunumber(synd_code, paddr, buf, buflen) == -1)
152 spin_unlock_irqrestore(&dimm_handler_lock, flags);
157 int register_dimm_printer(dimm_printer_t func)
162 spin_lock_irqsave(&dimm_handler_lock, flags);
167 spin_unlock_irqrestore(&dimm_handler_lock, flags);
171 EXPORT_SYMBOL_GPL(register_dimm_printer);
173 void unregister_dimm_printer(dimm_printer_t func)
177 spin_lock_irqsave(&dimm_handler_lock, flags);
178 if (dimm_handler == func)
180 spin_unlock_irqrestore(&dimm_handler_lock, flags);
182 EXPORT_SYMBOL_GPL(unregister_dimm_printer);
184 void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
188 if (notify_die(DIE_TRAP, "instruction access exception", regs,
189 0, 0x8, SIGTRAP) == NOTIFY_STOP)
192 if (regs->tstate & TSTATE_PRIV) {
193 printk("spitfire_insn_access_exception: SFSR[%016lx] "
194 "SFAR[%016lx], going.\n", sfsr, sfar);
195 die_if_kernel("Iax", regs);
197 if (test_thread_flag(TIF_32BIT)) {
198 regs->tpc &= 0xffffffff;
199 regs->tnpc &= 0xffffffff;
201 info.si_signo = SIGSEGV;
203 info.si_code = SEGV_MAPERR;
204 info.si_addr = (void __user *)regs->tpc;
206 force_sig_info(SIGSEGV, &info, current);
209 void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
211 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
212 0, 0x8, SIGTRAP) == NOTIFY_STOP)
215 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
216 spitfire_insn_access_exception(regs, sfsr, sfar);
219 void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
221 unsigned short type = (type_ctx >> 16);
222 unsigned short ctx = (type_ctx & 0xffff);
225 if (notify_die(DIE_TRAP, "instruction access exception", regs,
226 0, 0x8, SIGTRAP) == NOTIFY_STOP)
229 if (regs->tstate & TSTATE_PRIV) {
230 printk("sun4v_insn_access_exception: ADDR[%016lx] "
231 "CTX[%04x] TYPE[%04x], going.\n",
233 die_if_kernel("Iax", regs);
236 if (test_thread_flag(TIF_32BIT)) {
237 regs->tpc &= 0xffffffff;
238 regs->tnpc &= 0xffffffff;
240 info.si_signo = SIGSEGV;
242 info.si_code = SEGV_MAPERR;
243 info.si_addr = (void __user *) addr;
245 force_sig_info(SIGSEGV, &info, current);
248 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
250 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
251 0, 0x8, SIGTRAP) == NOTIFY_STOP)
254 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
255 sun4v_insn_access_exception(regs, addr, type_ctx);
258 void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
262 if (notify_die(DIE_TRAP, "data access exception", regs,
263 0, 0x30, SIGTRAP) == NOTIFY_STOP)
266 if (regs->tstate & TSTATE_PRIV) {
267 /* Test if this comes from uaccess places. */
268 const struct exception_table_entry *entry;
270 entry = search_exception_tables(regs->tpc);
272 /* Ouch, somebody is trying VM hole tricks on us... */
273 #ifdef DEBUG_EXCEPTIONS
274 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
275 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
276 regs->tpc, entry->fixup);
278 regs->tpc = entry->fixup;
279 regs->tnpc = regs->tpc + 4;
283 printk("spitfire_data_access_exception: SFSR[%016lx] "
284 "SFAR[%016lx], going.\n", sfsr, sfar);
285 die_if_kernel("Dax", regs);
288 info.si_signo = SIGSEGV;
290 info.si_code = SEGV_MAPERR;
291 info.si_addr = (void __user *)sfar;
293 force_sig_info(SIGSEGV, &info, current);
296 void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
298 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
299 0, 0x30, SIGTRAP) == NOTIFY_STOP)
302 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
303 spitfire_data_access_exception(regs, sfsr, sfar);
306 void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
308 unsigned short type = (type_ctx >> 16);
309 unsigned short ctx = (type_ctx & 0xffff);
312 if (notify_die(DIE_TRAP, "data access exception", regs,
313 0, 0x8, SIGTRAP) == NOTIFY_STOP)
316 if (regs->tstate & TSTATE_PRIV) {
317 /* Test if this comes from uaccess places. */
318 const struct exception_table_entry *entry;
320 entry = search_exception_tables(regs->tpc);
322 /* Ouch, somebody is trying VM hole tricks on us... */
323 #ifdef DEBUG_EXCEPTIONS
324 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
325 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
326 regs->tpc, entry->fixup);
328 regs->tpc = entry->fixup;
329 regs->tnpc = regs->tpc + 4;
332 printk("sun4v_data_access_exception: ADDR[%016lx] "
333 "CTX[%04x] TYPE[%04x], going.\n",
335 die_if_kernel("Dax", regs);
338 if (test_thread_flag(TIF_32BIT)) {
339 regs->tpc &= 0xffffffff;
340 regs->tnpc &= 0xffffffff;
342 info.si_signo = SIGSEGV;
344 info.si_code = SEGV_MAPERR;
345 info.si_addr = (void __user *) addr;
347 force_sig_info(SIGSEGV, &info, current);
350 void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
352 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
353 0, 0x8, SIGTRAP) == NOTIFY_STOP)
356 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
357 sun4v_data_access_exception(regs, addr, type_ctx);
361 #include "pci_impl.h"
364 /* When access exceptions happen, we must do this. */
365 static void spitfire_clean_and_reenable_l1_caches(void)
369 if (tlb_type != spitfire)
373 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
374 spitfire_put_icache_tag(va, 0x0);
375 spitfire_put_dcache_tag(va, 0x0);
378 /* Re-enable in LSU. */
379 __asm__ __volatile__("flush %%g6\n\t"
381 "stxa %0, [%%g0] %1\n\t"
384 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
385 LSU_CONTROL_IM | LSU_CONTROL_DM),
386 "i" (ASI_LSU_CONTROL)
390 static void spitfire_enable_estate_errors(void)
392 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
395 : "r" (ESTATE_ERR_ALL),
396 "i" (ASI_ESTATE_ERROR_EN));
399 static char ecc_syndrome_table[] = {
400 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
401 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
402 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
403 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
404 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
405 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
406 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
407 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
408 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
409 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
410 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
411 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
412 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
413 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
414 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
415 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
416 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
417 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
418 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
419 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
420 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
421 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
422 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
423 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
424 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
425 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
426 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
427 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
428 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
429 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
430 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
431 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
434 static char *syndrome_unknown = "<Unknown>";
436 static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
438 unsigned short scode;
439 char memmod_str[64], *p;
442 scode = ecc_syndrome_table[udbl & 0xff];
443 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
444 p = syndrome_unknown;
447 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
448 "Memory Module \"%s\"\n",
449 smp_processor_id(), scode, p);
453 scode = ecc_syndrome_table[udbh & 0xff];
454 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
455 p = syndrome_unknown;
458 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
459 "Memory Module \"%s\"\n",
460 smp_processor_id(), scode, p);
465 static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
468 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
469 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
470 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
472 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
474 /* We always log it, even if someone is listening for this
477 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
478 0, TRAP_TYPE_CEE, SIGTRAP);
480 /* The Correctable ECC Error trap does not disable I/D caches. So
481 * we only have to restore the ESTATE Error Enable register.
483 spitfire_enable_estate_errors();
486 static void spitfire_ue_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long tt, int tl1, struct pt_regs *regs)
490 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
491 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
492 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
494 /* XXX add more human friendly logging of the error status
495 * XXX as is implemented for cheetah
498 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
500 /* We always log it, even if someone is listening for this
503 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
506 if (regs->tstate & TSTATE_PRIV) {
508 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
509 die_if_kernel("UE", regs);
512 /* XXX need more intelligent processing here, such as is implemented
513 * XXX for cheetah errors, in fact if the E-cache still holds the
514 * XXX line with bad parity this will loop
517 spitfire_clean_and_reenable_l1_caches();
518 spitfire_enable_estate_errors();
520 if (test_thread_flag(TIF_32BIT)) {
521 regs->tpc &= 0xffffffff;
522 regs->tnpc &= 0xffffffff;
524 info.si_signo = SIGBUS;
526 info.si_code = BUS_OBJERR;
527 info.si_addr = (void *)0;
529 force_sig_info(SIGBUS, &info, current);
532 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
534 unsigned long afsr, tt, udbh, udbl;
537 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
538 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
539 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
540 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
541 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
544 if (tt == TRAP_TYPE_DAE &&
545 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
546 spitfire_clean_and_reenable_l1_caches();
547 spitfire_enable_estate_errors();
549 pci_poke_faulted = 1;
550 regs->tnpc = regs->tpc + 4;
555 if (afsr & SFAFSR_UE)
556 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
558 if (tt == TRAP_TYPE_CEE) {
559 /* Handle the case where we took a CEE trap, but ACK'd
560 * only the UE state in the UDB error registers.
562 if (afsr & SFAFSR_UE) {
563 if (udbh & UDBE_CE) {
564 __asm__ __volatile__(
565 "stxa %0, [%1] %2\n\t"
568 : "r" (udbh & UDBE_CE),
569 "r" (0x0), "i" (ASI_UDB_ERROR_W));
571 if (udbl & UDBE_CE) {
572 __asm__ __volatile__(
573 "stxa %0, [%1] %2\n\t"
576 : "r" (udbl & UDBE_CE),
577 "r" (0x18), "i" (ASI_UDB_ERROR_W));
581 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
585 int cheetah_pcache_forced_on;
587 void cheetah_enable_pcache(void)
591 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
594 __asm__ __volatile__("ldxa [%%g0] %1, %0"
596 : "i" (ASI_DCU_CONTROL_REG));
597 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
598 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
601 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
604 /* Cheetah error trap handling. */
605 static unsigned long ecache_flush_physbase;
606 static unsigned long ecache_flush_linesize;
607 static unsigned long ecache_flush_size;
609 /* This table is ordered in priority of errors and matches the
610 * AFAR overwrite policy as well.
613 struct afsr_error_table {
618 static const char CHAFSR_PERR_msg[] =
619 "System interface protocol error";
620 static const char CHAFSR_IERR_msg[] =
621 "Internal processor error";
622 static const char CHAFSR_ISAP_msg[] =
623 "System request parity error on incoming addresss";
624 static const char CHAFSR_UCU_msg[] =
625 "Uncorrectable E-cache ECC error for ifetch/data";
626 static const char CHAFSR_UCC_msg[] =
627 "SW Correctable E-cache ECC error for ifetch/data";
628 static const char CHAFSR_UE_msg[] =
629 "Uncorrectable system bus data ECC error for read";
630 static const char CHAFSR_EDU_msg[] =
631 "Uncorrectable E-cache ECC error for stmerge/blkld";
632 static const char CHAFSR_EMU_msg[] =
633 "Uncorrectable system bus MTAG error";
634 static const char CHAFSR_WDU_msg[] =
635 "Uncorrectable E-cache ECC error for writeback";
636 static const char CHAFSR_CPU_msg[] =
637 "Uncorrectable ECC error for copyout";
638 static const char CHAFSR_CE_msg[] =
639 "HW corrected system bus data ECC error for read";
640 static const char CHAFSR_EDC_msg[] =
641 "HW corrected E-cache ECC error for stmerge/blkld";
642 static const char CHAFSR_EMC_msg[] =
643 "HW corrected system bus MTAG ECC error";
644 static const char CHAFSR_WDC_msg[] =
645 "HW corrected E-cache ECC error for writeback";
646 static const char CHAFSR_CPC_msg[] =
647 "HW corrected ECC error for copyout";
648 static const char CHAFSR_TO_msg[] =
649 "Unmapped error from system bus";
650 static const char CHAFSR_BERR_msg[] =
651 "Bus error response from system bus";
652 static const char CHAFSR_IVC_msg[] =
653 "HW corrected system bus data ECC error for ivec read";
654 static const char CHAFSR_IVU_msg[] =
655 "Uncorrectable system bus data ECC error for ivec read";
656 static struct afsr_error_table __cheetah_error_table[] = {
657 { CHAFSR_PERR, CHAFSR_PERR_msg },
658 { CHAFSR_IERR, CHAFSR_IERR_msg },
659 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
660 { CHAFSR_UCU, CHAFSR_UCU_msg },
661 { CHAFSR_UCC, CHAFSR_UCC_msg },
662 { CHAFSR_UE, CHAFSR_UE_msg },
663 { CHAFSR_EDU, CHAFSR_EDU_msg },
664 { CHAFSR_EMU, CHAFSR_EMU_msg },
665 { CHAFSR_WDU, CHAFSR_WDU_msg },
666 { CHAFSR_CPU, CHAFSR_CPU_msg },
667 { CHAFSR_CE, CHAFSR_CE_msg },
668 { CHAFSR_EDC, CHAFSR_EDC_msg },
669 { CHAFSR_EMC, CHAFSR_EMC_msg },
670 { CHAFSR_WDC, CHAFSR_WDC_msg },
671 { CHAFSR_CPC, CHAFSR_CPC_msg },
672 { CHAFSR_TO, CHAFSR_TO_msg },
673 { CHAFSR_BERR, CHAFSR_BERR_msg },
674 /* These two do not update the AFAR. */
675 { CHAFSR_IVC, CHAFSR_IVC_msg },
676 { CHAFSR_IVU, CHAFSR_IVU_msg },
679 static const char CHPAFSR_DTO_msg[] =
680 "System bus unmapped error for prefetch/storequeue-read";
681 static const char CHPAFSR_DBERR_msg[] =
682 "System bus error for prefetch/storequeue-read";
683 static const char CHPAFSR_THCE_msg[] =
684 "Hardware corrected E-cache Tag ECC error";
685 static const char CHPAFSR_TSCE_msg[] =
686 "SW handled correctable E-cache Tag ECC error";
687 static const char CHPAFSR_TUE_msg[] =
688 "Uncorrectable E-cache Tag ECC error";
689 static const char CHPAFSR_DUE_msg[] =
690 "System bus uncorrectable data ECC error due to prefetch/store-fill";
691 static struct afsr_error_table __cheetah_plus_error_table[] = {
692 { CHAFSR_PERR, CHAFSR_PERR_msg },
693 { CHAFSR_IERR, CHAFSR_IERR_msg },
694 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
695 { CHAFSR_UCU, CHAFSR_UCU_msg },
696 { CHAFSR_UCC, CHAFSR_UCC_msg },
697 { CHAFSR_UE, CHAFSR_UE_msg },
698 { CHAFSR_EDU, CHAFSR_EDU_msg },
699 { CHAFSR_EMU, CHAFSR_EMU_msg },
700 { CHAFSR_WDU, CHAFSR_WDU_msg },
701 { CHAFSR_CPU, CHAFSR_CPU_msg },
702 { CHAFSR_CE, CHAFSR_CE_msg },
703 { CHAFSR_EDC, CHAFSR_EDC_msg },
704 { CHAFSR_EMC, CHAFSR_EMC_msg },
705 { CHAFSR_WDC, CHAFSR_WDC_msg },
706 { CHAFSR_CPC, CHAFSR_CPC_msg },
707 { CHAFSR_TO, CHAFSR_TO_msg },
708 { CHAFSR_BERR, CHAFSR_BERR_msg },
709 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
710 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
711 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
712 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
713 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
714 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
715 /* These two do not update the AFAR. */
716 { CHAFSR_IVC, CHAFSR_IVC_msg },
717 { CHAFSR_IVU, CHAFSR_IVU_msg },
720 static const char JPAFSR_JETO_msg[] =
721 "System interface protocol error, hw timeout caused";
722 static const char JPAFSR_SCE_msg[] =
723 "Parity error on system snoop results";
724 static const char JPAFSR_JEIC_msg[] =
725 "System interface protocol error, illegal command detected";
726 static const char JPAFSR_JEIT_msg[] =
727 "System interface protocol error, illegal ADTYPE detected";
728 static const char JPAFSR_OM_msg[] =
729 "Out of range memory error has occurred";
730 static const char JPAFSR_ETP_msg[] =
731 "Parity error on L2 cache tag SRAM";
732 static const char JPAFSR_UMS_msg[] =
733 "Error due to unsupported store";
734 static const char JPAFSR_RUE_msg[] =
735 "Uncorrectable ECC error from remote cache/memory";
736 static const char JPAFSR_RCE_msg[] =
737 "Correctable ECC error from remote cache/memory";
738 static const char JPAFSR_BP_msg[] =
739 "JBUS parity error on returned read data";
740 static const char JPAFSR_WBP_msg[] =
741 "JBUS parity error on data for writeback or block store";
742 static const char JPAFSR_FRC_msg[] =
743 "Foreign read to DRAM incurring correctable ECC error";
744 static const char JPAFSR_FRU_msg[] =
745 "Foreign read to DRAM incurring uncorrectable ECC error";
746 static struct afsr_error_table __jalapeno_error_table[] = {
747 { JPAFSR_JETO, JPAFSR_JETO_msg },
748 { JPAFSR_SCE, JPAFSR_SCE_msg },
749 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
750 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
751 { CHAFSR_PERR, CHAFSR_PERR_msg },
752 { CHAFSR_IERR, CHAFSR_IERR_msg },
753 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
754 { CHAFSR_UCU, CHAFSR_UCU_msg },
755 { CHAFSR_UCC, CHAFSR_UCC_msg },
756 { CHAFSR_UE, CHAFSR_UE_msg },
757 { CHAFSR_EDU, CHAFSR_EDU_msg },
758 { JPAFSR_OM, JPAFSR_OM_msg },
759 { CHAFSR_WDU, CHAFSR_WDU_msg },
760 { CHAFSR_CPU, CHAFSR_CPU_msg },
761 { CHAFSR_CE, CHAFSR_CE_msg },
762 { CHAFSR_EDC, CHAFSR_EDC_msg },
763 { JPAFSR_ETP, JPAFSR_ETP_msg },
764 { CHAFSR_WDC, CHAFSR_WDC_msg },
765 { CHAFSR_CPC, CHAFSR_CPC_msg },
766 { CHAFSR_TO, CHAFSR_TO_msg },
767 { CHAFSR_BERR, CHAFSR_BERR_msg },
768 { JPAFSR_UMS, JPAFSR_UMS_msg },
769 { JPAFSR_RUE, JPAFSR_RUE_msg },
770 { JPAFSR_RCE, JPAFSR_RCE_msg },
771 { JPAFSR_BP, JPAFSR_BP_msg },
772 { JPAFSR_WBP, JPAFSR_WBP_msg },
773 { JPAFSR_FRC, JPAFSR_FRC_msg },
774 { JPAFSR_FRU, JPAFSR_FRU_msg },
775 /* These two do not update the AFAR. */
776 { CHAFSR_IVU, CHAFSR_IVU_msg },
779 static struct afsr_error_table *cheetah_error_table;
780 static unsigned long cheetah_afsr_errors;
782 struct cheetah_err_info *cheetah_error_log;
784 static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
786 struct cheetah_err_info *p;
787 int cpu = smp_processor_id();
789 if (!cheetah_error_log)
792 p = cheetah_error_log + (cpu * 2);
793 if ((afsr & CHAFSR_TL1) != 0UL)
799 extern unsigned int tl0_icpe[], tl1_icpe[];
800 extern unsigned int tl0_dcpe[], tl1_dcpe[];
801 extern unsigned int tl0_fecc[], tl1_fecc[];
802 extern unsigned int tl0_cee[], tl1_cee[];
803 extern unsigned int tl0_iae[], tl1_iae[];
804 extern unsigned int tl0_dae[], tl1_dae[];
805 extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
806 extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
807 extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
808 extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
809 extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
811 void __init cheetah_ecache_flush_init(void)
813 unsigned long largest_size, smallest_linesize, order, ver;
816 /* Scan all cpu device tree nodes, note two values:
817 * 1) largest E-cache size
818 * 2) smallest E-cache line size
821 smallest_linesize = ~0UL;
823 for (i = 0; i < NR_CPUS; i++) {
826 val = cpu_data(i).ecache_size;
830 if (val > largest_size)
833 val = cpu_data(i).ecache_line_size;
834 if (val < smallest_linesize)
835 smallest_linesize = val;
839 if (largest_size == 0UL || smallest_linesize == ~0UL) {
840 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
845 ecache_flush_size = (2 * largest_size);
846 ecache_flush_linesize = smallest_linesize;
848 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
850 if (ecache_flush_physbase == ~0UL) {
851 prom_printf("cheetah_ecache_flush_init: Cannot find %d byte "
852 "contiguous physical memory.\n",
857 /* Now allocate error trap reporting scoreboard. */
858 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
859 for (order = 0; order < MAX_ORDER; order++) {
860 if ((PAGE_SIZE << order) >= sz)
863 cheetah_error_log = (struct cheetah_err_info *)
864 __get_free_pages(GFP_KERNEL, order);
865 if (!cheetah_error_log) {
866 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
867 "error logging scoreboard (%d bytes).\n", sz);
870 memset(cheetah_error_log, 0, PAGE_SIZE << order);
872 /* Mark all AFSRs as invalid so that the trap handler will
873 * log new new information there.
875 for (i = 0; i < 2 * NR_CPUS; i++)
876 cheetah_error_log[i].afsr = CHAFSR_INVALID;
878 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
879 if ((ver >> 32) == __JALAPENO_ID ||
880 (ver >> 32) == __SERRANO_ID) {
881 cheetah_error_table = &__jalapeno_error_table[0];
882 cheetah_afsr_errors = JPAFSR_ERRORS;
883 } else if ((ver >> 32) == 0x003e0015) {
884 cheetah_error_table = &__cheetah_plus_error_table[0];
885 cheetah_afsr_errors = CHPAFSR_ERRORS;
887 cheetah_error_table = &__cheetah_error_table[0];
888 cheetah_afsr_errors = CHAFSR_ERRORS;
891 /* Now patch trap tables. */
892 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
893 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
894 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
895 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
896 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
897 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
898 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
899 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
900 if (tlb_type == cheetah_plus) {
901 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
902 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
903 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
904 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
909 static void cheetah_flush_ecache(void)
911 unsigned long flush_base = ecache_flush_physbase;
912 unsigned long flush_linesize = ecache_flush_linesize;
913 unsigned long flush_size = ecache_flush_size;
915 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
916 " bne,pt %%xcc, 1b\n\t"
917 " ldxa [%2 + %0] %3, %%g0\n\t"
919 : "0" (flush_size), "r" (flush_base),
920 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
923 static void cheetah_flush_ecache_line(unsigned long physaddr)
927 physaddr &= ~(8UL - 1UL);
928 physaddr = (ecache_flush_physbase +
929 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
930 alias = physaddr + (ecache_flush_size >> 1UL);
931 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
932 "ldxa [%1] %2, %%g0\n\t"
935 : "r" (physaddr), "r" (alias),
936 "i" (ASI_PHYS_USE_EC));
939 /* Unfortunately, the diagnostic access to the I-cache tags we need to
940 * use to clear the thing interferes with I-cache coherency transactions.
942 * So we must only flush the I-cache when it is disabled.
944 static void __cheetah_flush_icache(void)
946 unsigned int icache_size, icache_line_size;
949 icache_size = local_cpu_data().icache_size;
950 icache_line_size = local_cpu_data().icache_line_size;
952 /* Clear the valid bits in all the tags. */
953 for (addr = 0; addr < icache_size; addr += icache_line_size) {
954 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
957 : "r" (addr | (2 << 3)),
962 static void cheetah_flush_icache(void)
964 unsigned long dcu_save;
966 /* Save current DCU, disable I-cache. */
967 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
968 "or %0, %2, %%g1\n\t"
969 "stxa %%g1, [%%g0] %1\n\t"
972 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
975 __cheetah_flush_icache();
977 /* Restore DCU register */
978 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
981 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
984 static void cheetah_flush_dcache(void)
986 unsigned int dcache_size, dcache_line_size;
989 dcache_size = local_cpu_data().dcache_size;
990 dcache_line_size = local_cpu_data().dcache_line_size;
992 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
993 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
996 : "r" (addr), "i" (ASI_DCACHE_TAG));
1000 /* In order to make the even parity correct we must do two things.
1001 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
1002 * Next, we clear out all 32-bytes of data for that line. Data of
1003 * all-zero + tag parity value of zero == correct parity.
1005 static void cheetah_plus_zap_dcache_parity(void)
1007 unsigned int dcache_size, dcache_line_size;
1010 dcache_size = local_cpu_data().dcache_size;
1011 dcache_line_size = local_cpu_data().dcache_line_size;
1013 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1014 unsigned long tag = (addr >> 14);
1017 __asm__ __volatile__("membar #Sync\n\t"
1018 "stxa %0, [%1] %2\n\t"
1021 : "r" (tag), "r" (addr),
1022 "i" (ASI_DCACHE_UTAG));
1023 for (line = addr; line < addr + dcache_line_size; line += 8)
1024 __asm__ __volatile__("membar #Sync\n\t"
1025 "stxa %%g0, [%0] %1\n\t"
1029 "i" (ASI_DCACHE_DATA));
1033 /* Conversion tables used to frob Cheetah AFSR syndrome values into
1034 * something palatable to the memory controller driver get_unumber
1058 static unsigned char cheetah_ecc_syntab[] = {
1059 /*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1060 /*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1061 /*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1062 /*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1063 /*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1064 /*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1065 /*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1066 /*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1067 /*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1068 /*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1069 /*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1070 /*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1071 /*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1072 /*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1073 /*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1074 /*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1075 /*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1076 /*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1077 /*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1078 /*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1079 /*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1080 /*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1081 /*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1082 /*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1083 /*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1084 /*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1085 /*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1086 /*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1087 /*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1088 /*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1089 /*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1090 /*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1092 static unsigned char cheetah_mtag_syntab[] = {
1103 /* Return the highest priority error conditon mentioned. */
1104 static inline unsigned long cheetah_get_hipri(unsigned long afsr)
1106 unsigned long tmp = 0;
1109 for (i = 0; cheetah_error_table[i].mask; i++) {
1110 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1116 static const char *cheetah_get_string(unsigned long bit)
1120 for (i = 0; cheetah_error_table[i].mask; i++) {
1121 if ((bit & cheetah_error_table[i].mask) != 0UL)
1122 return cheetah_error_table[i].name;
1127 static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1128 unsigned long afsr, unsigned long afar, int recoverable)
1130 unsigned long hipri;
1133 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1134 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1136 (afsr & CHAFSR_TL1) ? 1 : 0);
1137 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1138 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1139 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1140 printk("%s" "ERROR(%d): ",
1141 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1142 printk("TPC<%pS>\n", (void *) regs->tpc);
1143 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1144 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1145 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1146 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1147 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1148 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1149 hipri = cheetah_get_hipri(afsr);
1150 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1151 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1152 hipri, cheetah_get_string(hipri));
1154 /* Try to get unumber if relevant. */
1155 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1156 CHAFSR_CPC | CHAFSR_CPU | \
1157 CHAFSR_UE | CHAFSR_CE | \
1158 CHAFSR_EDC | CHAFSR_EDU | \
1159 CHAFSR_UCC | CHAFSR_UCU | \
1160 CHAFSR_WDU | CHAFSR_WDC)
1161 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1162 if (afsr & ESYND_ERRORS) {
1166 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1167 syndrome = cheetah_ecc_syntab[syndrome];
1168 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1170 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1171 (recoverable ? KERN_WARNING : KERN_CRIT),
1172 smp_processor_id(), unum);
1173 } else if (afsr & MSYND_ERRORS) {
1177 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1178 syndrome = cheetah_mtag_syntab[syndrome];
1179 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1181 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1182 (recoverable ? KERN_WARNING : KERN_CRIT),
1183 smp_processor_id(), unum);
1186 /* Now dump the cache snapshots. */
1187 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx]\n",
1188 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1189 (int) info->dcache_index,
1193 printk("%s" "ERROR(%d): D-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1194 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1195 info->dcache_data[0],
1196 info->dcache_data[1],
1197 info->dcache_data[2],
1198 info->dcache_data[3]);
1199 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx] "
1200 "u[%016llx] l[%016llx]\n",
1201 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1202 (int) info->icache_index,
1207 info->icache_lower);
1208 printk("%s" "ERROR(%d): I-cache INSN0[%016llx] INSN1[%016llx] INSN2[%016llx] INSN3[%016llx]\n",
1209 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1210 info->icache_data[0],
1211 info->icache_data[1],
1212 info->icache_data[2],
1213 info->icache_data[3]);
1214 printk("%s" "ERROR(%d): I-cache INSN4[%016llx] INSN5[%016llx] INSN6[%016llx] INSN7[%016llx]\n",
1215 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1216 info->icache_data[4],
1217 info->icache_data[5],
1218 info->icache_data[6],
1219 info->icache_data[7]);
1220 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016llx]\n",
1221 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1222 (int) info->ecache_index, info->ecache_tag);
1223 printk("%s" "ERROR(%d): E-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1224 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1225 info->ecache_data[0],
1226 info->ecache_data[1],
1227 info->ecache_data[2],
1228 info->ecache_data[3]);
1230 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1231 while (afsr != 0UL) {
1232 unsigned long bit = cheetah_get_hipri(afsr);
1234 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1235 (recoverable ? KERN_WARNING : KERN_CRIT),
1236 bit, cheetah_get_string(bit));
1242 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1245 static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1247 unsigned long afsr, afar;
1250 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1253 if ((afsr & cheetah_afsr_errors) != 0) {
1255 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1263 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1265 : : "r" (afsr), "i" (ASI_AFSR));
1270 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1272 struct cheetah_err_info local_snapshot, *p;
1276 cheetah_flush_ecache();
1278 p = cheetah_get_error_log(afsr);
1280 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1282 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1283 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1287 /* Grab snapshot of logged error. */
1288 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1290 /* If the current trap snapshot does not match what the
1291 * trap handler passed along into our args, big trouble.
1292 * In such a case, mark the local copy as invalid.
1294 * Else, it matches and we mark the afsr in the non-local
1295 * copy as invalid so we may log new error traps there.
1297 if (p->afsr != afsr || p->afar != afar)
1298 local_snapshot.afsr = CHAFSR_INVALID;
1300 p->afsr = CHAFSR_INVALID;
1302 cheetah_flush_icache();
1303 cheetah_flush_dcache();
1305 /* Re-enable I-cache/D-cache */
1306 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1307 "or %%g1, %1, %%g1\n\t"
1308 "stxa %%g1, [%%g0] %0\n\t"
1311 : "i" (ASI_DCU_CONTROL_REG),
1312 "i" (DCU_DC | DCU_IC)
1315 /* Re-enable error reporting */
1316 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1317 "or %%g1, %1, %%g1\n\t"
1318 "stxa %%g1, [%%g0] %0\n\t"
1321 : "i" (ASI_ESTATE_ERROR_EN),
1322 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1325 /* Decide if we can continue after handling this trap and
1326 * logging the error.
1329 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1332 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1333 * error was logged while we had error reporting traps disabled.
1335 if (cheetah_recheck_errors(&local_snapshot)) {
1336 unsigned long new_afsr = local_snapshot.afsr;
1338 /* If we got a new asynchronous error, die... */
1339 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1340 CHAFSR_WDU | CHAFSR_CPU |
1341 CHAFSR_IVU | CHAFSR_UE |
1342 CHAFSR_BERR | CHAFSR_TO))
1347 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1350 panic("Irrecoverable Fast-ECC error trap.\n");
1352 /* Flush E-cache to kick the error trap handlers out. */
1353 cheetah_flush_ecache();
1356 /* Try to fix a correctable error by pushing the line out from
1357 * the E-cache. Recheck error reporting registers to see if the
1358 * problem is intermittent.
1360 static int cheetah_fix_ce(unsigned long physaddr)
1362 unsigned long orig_estate;
1363 unsigned long alias1, alias2;
1366 /* Make sure correctable error traps are disabled. */
1367 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1368 "andn %0, %1, %%g1\n\t"
1369 "stxa %%g1, [%%g0] %2\n\t"
1371 : "=&r" (orig_estate)
1372 : "i" (ESTATE_ERROR_CEEN),
1373 "i" (ASI_ESTATE_ERROR_EN)
1376 /* We calculate alias addresses that will force the
1377 * cache line in question out of the E-cache. Then
1378 * we bring it back in with an atomic instruction so
1379 * that we get it in some modified/exclusive state,
1380 * then we displace it again to try and get proper ECC
1381 * pushed back into the system.
1383 physaddr &= ~(8UL - 1UL);
1384 alias1 = (ecache_flush_physbase +
1385 (physaddr & ((ecache_flush_size >> 1) - 1)));
1386 alias2 = alias1 + (ecache_flush_size >> 1);
1387 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1388 "ldxa [%1] %3, %%g0\n\t"
1389 "casxa [%2] %3, %%g0, %%g0\n\t"
1390 "ldxa [%0] %3, %%g0\n\t"
1391 "ldxa [%1] %3, %%g0\n\t"
1394 : "r" (alias1), "r" (alias2),
1395 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1397 /* Did that trigger another error? */
1398 if (cheetah_recheck_errors(NULL)) {
1399 /* Try one more time. */
1400 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1402 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1403 if (cheetah_recheck_errors(NULL))
1408 /* No new error, intermittent problem. */
1412 /* Restore error enables. */
1413 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1415 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1420 /* Return non-zero if PADDR is a valid physical memory address. */
1421 static int cheetah_check_main_memory(unsigned long paddr)
1423 unsigned long vaddr = PAGE_OFFSET + paddr;
1425 if (vaddr > (unsigned long) high_memory)
1428 return kern_addr_valid(vaddr);
1431 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1433 struct cheetah_err_info local_snapshot, *p;
1434 int recoverable, is_memory;
1436 p = cheetah_get_error_log(afsr);
1438 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1440 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1441 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1445 /* Grab snapshot of logged error. */
1446 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1448 /* If the current trap snapshot does not match what the
1449 * trap handler passed along into our args, big trouble.
1450 * In such a case, mark the local copy as invalid.
1452 * Else, it matches and we mark the afsr in the non-local
1453 * copy as invalid so we may log new error traps there.
1455 if (p->afsr != afsr || p->afar != afar)
1456 local_snapshot.afsr = CHAFSR_INVALID;
1458 p->afsr = CHAFSR_INVALID;
1460 is_memory = cheetah_check_main_memory(afar);
1462 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1463 /* XXX Might want to log the results of this operation
1464 * XXX somewhere... -DaveM
1466 cheetah_fix_ce(afar);
1470 int flush_all, flush_line;
1472 flush_all = flush_line = 0;
1473 if ((afsr & CHAFSR_EDC) != 0UL) {
1474 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1478 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1479 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1485 /* Trap handler only disabled I-cache, flush it. */
1486 cheetah_flush_icache();
1488 /* Re-enable I-cache */
1489 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1490 "or %%g1, %1, %%g1\n\t"
1491 "stxa %%g1, [%%g0] %0\n\t"
1494 : "i" (ASI_DCU_CONTROL_REG),
1499 cheetah_flush_ecache();
1500 else if (flush_line)
1501 cheetah_flush_ecache_line(afar);
1504 /* Re-enable error reporting */
1505 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1506 "or %%g1, %1, %%g1\n\t"
1507 "stxa %%g1, [%%g0] %0\n\t"
1510 : "i" (ASI_ESTATE_ERROR_EN),
1511 "i" (ESTATE_ERROR_CEEN)
1514 /* Decide if we can continue after handling this trap and
1515 * logging the error.
1518 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1521 /* Re-check AFSR/AFAR */
1522 (void) cheetah_recheck_errors(&local_snapshot);
1525 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1528 panic("Irrecoverable Correctable-ECC error trap.\n");
1531 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1533 struct cheetah_err_info local_snapshot, *p;
1534 int recoverable, is_memory;
1537 /* Check for the special PCI poke sequence. */
1538 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1539 cheetah_flush_icache();
1540 cheetah_flush_dcache();
1542 /* Re-enable I-cache/D-cache */
1543 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1544 "or %%g1, %1, %%g1\n\t"
1545 "stxa %%g1, [%%g0] %0\n\t"
1548 : "i" (ASI_DCU_CONTROL_REG),
1549 "i" (DCU_DC | DCU_IC)
1552 /* Re-enable error reporting */
1553 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1554 "or %%g1, %1, %%g1\n\t"
1555 "stxa %%g1, [%%g0] %0\n\t"
1558 : "i" (ASI_ESTATE_ERROR_EN),
1559 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1562 (void) cheetah_recheck_errors(NULL);
1564 pci_poke_faulted = 1;
1566 regs->tnpc = regs->tpc + 4;
1571 p = cheetah_get_error_log(afsr);
1573 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1575 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1576 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1580 /* Grab snapshot of logged error. */
1581 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1583 /* If the current trap snapshot does not match what the
1584 * trap handler passed along into our args, big trouble.
1585 * In such a case, mark the local copy as invalid.
1587 * Else, it matches and we mark the afsr in the non-local
1588 * copy as invalid so we may log new error traps there.
1590 if (p->afsr != afsr || p->afar != afar)
1591 local_snapshot.afsr = CHAFSR_INVALID;
1593 p->afsr = CHAFSR_INVALID;
1595 is_memory = cheetah_check_main_memory(afar);
1598 int flush_all, flush_line;
1600 flush_all = flush_line = 0;
1601 if ((afsr & CHAFSR_EDU) != 0UL) {
1602 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1606 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1607 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1613 cheetah_flush_icache();
1614 cheetah_flush_dcache();
1616 /* Re-enable I/D caches */
1617 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1618 "or %%g1, %1, %%g1\n\t"
1619 "stxa %%g1, [%%g0] %0\n\t"
1622 : "i" (ASI_DCU_CONTROL_REG),
1623 "i" (DCU_IC | DCU_DC)
1627 cheetah_flush_ecache();
1628 else if (flush_line)
1629 cheetah_flush_ecache_line(afar);
1632 /* Re-enable error reporting */
1633 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1634 "or %%g1, %1, %%g1\n\t"
1635 "stxa %%g1, [%%g0] %0\n\t"
1638 : "i" (ASI_ESTATE_ERROR_EN),
1639 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1642 /* Decide if we can continue after handling this trap and
1643 * logging the error.
1646 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1649 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1650 * error was logged while we had error reporting traps disabled.
1652 if (cheetah_recheck_errors(&local_snapshot)) {
1653 unsigned long new_afsr = local_snapshot.afsr;
1655 /* If we got a new asynchronous error, die... */
1656 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1657 CHAFSR_WDU | CHAFSR_CPU |
1658 CHAFSR_IVU | CHAFSR_UE |
1659 CHAFSR_BERR | CHAFSR_TO))
1664 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1666 /* "Recoverable" here means we try to yank the page from ever
1667 * being newly used again. This depends upon a few things:
1668 * 1) Must be main memory, and AFAR must be valid.
1669 * 2) If we trapped from user, OK.
1670 * 3) Else, if we trapped from kernel we must find exception
1671 * table entry (ie. we have to have been accessing user
1674 * If AFAR is not in main memory, or we trapped from kernel
1675 * and cannot find an exception table entry, it is unacceptable
1676 * to try and continue.
1678 if (recoverable && is_memory) {
1679 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1680 /* OK, usermode access. */
1683 const struct exception_table_entry *entry;
1685 entry = search_exception_tables(regs->tpc);
1687 /* OK, kernel access to userspace. */
1691 /* BAD, privileged state is corrupted. */
1696 if (pfn_valid(afar >> PAGE_SHIFT))
1697 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1701 /* Only perform fixup if we still have a
1702 * recoverable condition.
1705 regs->tpc = entry->fixup;
1706 regs->tnpc = regs->tpc + 4;
1715 panic("Irrecoverable deferred error trap.\n");
1718 /* Handle a D/I cache parity error trap. TYPE is encoded as:
1720 * Bit0: 0=dcache,1=icache
1721 * Bit1: 0=recoverable,1=unrecoverable
1723 * The hardware has disabled both the I-cache and D-cache in
1724 * the %dcr register.
1726 void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1729 __cheetah_flush_icache();
1731 cheetah_plus_zap_dcache_parity();
1732 cheetah_flush_dcache();
1734 /* Re-enable I-cache/D-cache */
1735 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1736 "or %%g1, %1, %%g1\n\t"
1737 "stxa %%g1, [%%g0] %0\n\t"
1740 : "i" (ASI_DCU_CONTROL_REG),
1741 "i" (DCU_DC | DCU_IC)
1745 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1747 (type & 0x1) ? 'I' : 'D',
1749 printk(KERN_EMERG "TPC<%pS>\n", (void *) regs->tpc);
1750 panic("Irrecoverable Cheetah+ parity error.");
1753 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1755 (type & 0x1) ? 'I' : 'D',
1757 printk(KERN_WARNING "TPC<%pS>\n", (void *) regs->tpc);
1760 struct sun4v_error_entry {
1765 #define SUN4V_ERR_TYPE_UNDEFINED 0
1766 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1767 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1768 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1769 #define SUN4V_ERR_TYPE_WARNING_RES 4
1772 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1773 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1774 #define SUN4V_ERR_ATTRS_PIO 0x00000004
1775 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1776 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1777 #define SUN4V_ERR_ATTRS_USER_MODE 0x01000000
1778 #define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000
1779 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1787 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1788 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1790 static const char *sun4v_err_type_to_str(u32 type)
1793 case SUN4V_ERR_TYPE_UNDEFINED:
1795 case SUN4V_ERR_TYPE_UNCORRECTED_RES:
1796 return "uncorrected resumable";
1797 case SUN4V_ERR_TYPE_PRECISE_NONRES:
1798 return "precise nonresumable";
1799 case SUN4V_ERR_TYPE_DEFERRED_NONRES:
1800 return "deferred nonresumable";
1801 case SUN4V_ERR_TYPE_WARNING_RES:
1802 return "warning resumable";
1808 static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
1812 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1813 printk("%s: err_handle[%llx] err_stick[%llx] err_type[%08x:%s]\n",
1815 ent->err_handle, ent->err_stick,
1817 sun4v_err_type_to_str(ent->err_type));
1818 printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n",
1821 ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ?
1823 ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ?
1825 ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ?
1827 ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ?
1828 "integer-regs" : ""),
1829 ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ?
1831 ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ?
1833 ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ?
1835 ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ?
1836 "queue-full" : ""));
1837 printk("%s: err_raddr[%016llx] err_size[%u] err_cpu[%u]\n",
1839 ent->err_raddr, ent->err_size, ent->err_cpu);
1843 if ((cnt = atomic_read(ocnt)) != 0) {
1844 atomic_set(ocnt, 0);
1846 printk("%s: Queue overflowed %d times.\n",
1851 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
1852 * Log the event and clear the first word of the entry.
1854 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
1856 struct sun4v_error_entry *ent, local_copy;
1857 struct trap_per_cpu *tb;
1858 unsigned long paddr;
1863 tb = &trap_block[cpu];
1864 paddr = tb->resum_kernel_buf_pa + offset;
1867 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1869 /* We have a local copy now, so release the entry. */
1870 ent->err_handle = 0;
1875 if (ent->err_type == SUN4V_ERR_TYPE_WARNING_RES) {
1876 /* If err_type is 0x4, it's a powerdown request. Do
1877 * not do the usual resumable error log because that
1878 * makes it look like some abnormal error.
1880 printk(KERN_INFO "Power down request...\n");
1881 kill_cad_pid(SIGINT, 1);
1885 sun4v_log_error(regs, &local_copy, cpu,
1886 KERN_ERR "RESUMABLE ERROR",
1887 &sun4v_resum_oflow_cnt);
1890 /* If we try to printk() we'll probably make matters worse, by trying
1891 * to retake locks this cpu already holds or causing more errors. So
1892 * just bump a counter, and we'll report these counter bumps above.
1894 void sun4v_resum_overflow(struct pt_regs *regs)
1896 atomic_inc(&sun4v_resum_oflow_cnt);
1899 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
1900 * Log the event, clear the first word of the entry, and die.
1902 void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
1904 struct sun4v_error_entry *ent, local_copy;
1905 struct trap_per_cpu *tb;
1906 unsigned long paddr;
1911 tb = &trap_block[cpu];
1912 paddr = tb->nonresum_kernel_buf_pa + offset;
1915 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1917 /* We have a local copy now, so release the entry. */
1918 ent->err_handle = 0;
1924 /* Check for the special PCI poke sequence. */
1925 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
1926 pci_poke_faulted = 1;
1928 regs->tnpc = regs->tpc + 4;
1933 sun4v_log_error(regs, &local_copy, cpu,
1934 KERN_EMERG "NON-RESUMABLE ERROR",
1935 &sun4v_nonresum_oflow_cnt);
1937 panic("Non-resumable error.");
1940 /* If we try to printk() we'll probably make matters worse, by trying
1941 * to retake locks this cpu already holds or causing more errors. So
1942 * just bump a counter, and we'll report these counter bumps above.
1944 void sun4v_nonresum_overflow(struct pt_regs *regs)
1946 /* XXX Actually even this can make not that much sense. Perhaps
1947 * XXX we should just pull the plug and panic directly from here?
1949 atomic_inc(&sun4v_nonresum_oflow_cnt);
1952 unsigned long sun4v_err_itlb_vaddr;
1953 unsigned long sun4v_err_itlb_ctx;
1954 unsigned long sun4v_err_itlb_pte;
1955 unsigned long sun4v_err_itlb_error;
1957 void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
1960 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1962 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
1964 printk(KERN_EMERG "SUN4V-ITLB: TPC<%pS>\n", (void *) regs->tpc);
1965 printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
1966 printk(KERN_EMERG "SUN4V-ITLB: O7<%pS>\n",
1967 (void *) regs->u_regs[UREG_I7]);
1968 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
1969 "pte[%lx] error[%lx]\n",
1970 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
1971 sun4v_err_itlb_pte, sun4v_err_itlb_error);
1976 unsigned long sun4v_err_dtlb_vaddr;
1977 unsigned long sun4v_err_dtlb_ctx;
1978 unsigned long sun4v_err_dtlb_pte;
1979 unsigned long sun4v_err_dtlb_error;
1981 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
1984 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1986 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
1988 printk(KERN_EMERG "SUN4V-DTLB: TPC<%pS>\n", (void *) regs->tpc);
1989 printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
1990 printk(KERN_EMERG "SUN4V-DTLB: O7<%pS>\n",
1991 (void *) regs->u_regs[UREG_I7]);
1992 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
1993 "pte[%lx] error[%lx]\n",
1994 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
1995 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
2000 void hypervisor_tlbop_error(unsigned long err, unsigned long op)
2002 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
2006 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
2008 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
2012 void do_fpe_common(struct pt_regs *regs)
2014 if (regs->tstate & TSTATE_PRIV) {
2015 regs->tpc = regs->tnpc;
2018 unsigned long fsr = current_thread_info()->xfsr[0];
2021 if (test_thread_flag(TIF_32BIT)) {
2022 regs->tpc &= 0xffffffff;
2023 regs->tnpc &= 0xffffffff;
2025 info.si_signo = SIGFPE;
2027 info.si_addr = (void __user *)regs->tpc;
2029 info.si_code = __SI_FAULT;
2030 if ((fsr & 0x1c000) == (1 << 14)) {
2032 info.si_code = FPE_FLTINV;
2033 else if (fsr & 0x08)
2034 info.si_code = FPE_FLTOVF;
2035 else if (fsr & 0x04)
2036 info.si_code = FPE_FLTUND;
2037 else if (fsr & 0x02)
2038 info.si_code = FPE_FLTDIV;
2039 else if (fsr & 0x01)
2040 info.si_code = FPE_FLTRES;
2042 force_sig_info(SIGFPE, &info, current);
2046 void do_fpieee(struct pt_regs *regs)
2048 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2049 0, 0x24, SIGFPE) == NOTIFY_STOP)
2052 do_fpe_common(regs);
2055 extern int do_mathemu(struct pt_regs *, struct fpustate *);
2057 void do_fpother(struct pt_regs *regs)
2059 struct fpustate *f = FPUSTATE;
2062 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2063 0, 0x25, SIGFPE) == NOTIFY_STOP)
2066 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2067 case (2 << 14): /* unfinished_FPop */
2068 case (3 << 14): /* unimplemented_FPop */
2069 ret = do_mathemu(regs, f);
2074 do_fpe_common(regs);
2077 void do_tof(struct pt_regs *regs)
2081 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2082 0, 0x26, SIGEMT) == NOTIFY_STOP)
2085 if (regs->tstate & TSTATE_PRIV)
2086 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2087 if (test_thread_flag(TIF_32BIT)) {
2088 regs->tpc &= 0xffffffff;
2089 regs->tnpc &= 0xffffffff;
2091 info.si_signo = SIGEMT;
2093 info.si_code = EMT_TAGOVF;
2094 info.si_addr = (void __user *)regs->tpc;
2096 force_sig_info(SIGEMT, &info, current);
2099 void do_div0(struct pt_regs *regs)
2103 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2104 0, 0x28, SIGFPE) == NOTIFY_STOP)
2107 if (regs->tstate & TSTATE_PRIV)
2108 die_if_kernel("TL0: Kernel divide by zero.", regs);
2109 if (test_thread_flag(TIF_32BIT)) {
2110 regs->tpc &= 0xffffffff;
2111 regs->tnpc &= 0xffffffff;
2113 info.si_signo = SIGFPE;
2115 info.si_code = FPE_INTDIV;
2116 info.si_addr = (void __user *)regs->tpc;
2118 force_sig_info(SIGFPE, &info, current);
2121 static void instruction_dump(unsigned int *pc)
2125 if ((((unsigned long) pc) & 3))
2128 printk("Instruction DUMP:");
2129 for (i = -3; i < 6; i++)
2130 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2134 static void user_instruction_dump(unsigned int __user *pc)
2137 unsigned int buf[9];
2139 if ((((unsigned long) pc) & 3))
2142 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2145 printk("Instruction DUMP:");
2146 for (i = 0; i < 9; i++)
2147 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2151 void show_stack(struct task_struct *tsk, unsigned long *_ksp)
2153 unsigned long fp, thread_base, ksp;
2154 struct thread_info *tp;
2157 ksp = (unsigned long) _ksp;
2160 tp = task_thread_info(tsk);
2163 asm("mov %%fp, %0" : "=r" (ksp));
2167 if (tp == current_thread_info())
2170 fp = ksp + STACK_BIAS;
2171 thread_base = (unsigned long) tp;
2173 printk("Call Trace:\n");
2175 struct sparc_stackf *sf;
2176 struct pt_regs *regs;
2179 if (!kstack_valid(tp, fp))
2181 sf = (struct sparc_stackf *) fp;
2182 regs = (struct pt_regs *) (sf + 1);
2184 if (kstack_is_trap_frame(tp, regs)) {
2185 if (!(regs->tstate & TSTATE_PRIV))
2188 fp = regs->u_regs[UREG_I6] + STACK_BIAS;
2190 pc = sf->callers_pc;
2191 fp = (unsigned long)sf->fp + STACK_BIAS;
2194 printk(" [%016lx] %pS\n", pc, (void *) pc);
2195 } while (++count < 16);
2198 void dump_stack(void)
2200 show_stack(current, NULL);
2203 EXPORT_SYMBOL(dump_stack);
2205 static inline int is_kernel_stack(struct task_struct *task,
2206 struct reg_window *rw)
2208 unsigned long rw_addr = (unsigned long) rw;
2209 unsigned long thread_base, thread_end;
2211 if (rw_addr < PAGE_OFFSET) {
2212 if (task != &init_task)
2216 thread_base = (unsigned long) task_stack_page(task);
2217 thread_end = thread_base + sizeof(union thread_union);
2218 if (rw_addr >= thread_base &&
2219 rw_addr < thread_end &&
2226 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2228 unsigned long fp = rw->ins[6];
2233 return (struct reg_window *) (fp + STACK_BIAS);
2236 void die_if_kernel(char *str, struct pt_regs *regs)
2238 static int die_counter;
2241 /* Amuse the user. */
2244 " \"@'/ .. \\`@\"\n"
2248 printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
2249 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2250 __asm__ __volatile__("flushw");
2252 add_taint(TAINT_DIE);
2253 if (regs->tstate & TSTATE_PRIV) {
2254 struct reg_window *rw = (struct reg_window *)
2255 (regs->u_regs[UREG_FP] + STACK_BIAS);
2257 /* Stop the back trace when we hit userland or we
2258 * find some badly aligned kernel stack.
2262 is_kernel_stack(current, rw)) {
2263 printk("Caller[%016lx]: %pS\n", rw->ins[7],
2264 (void *) rw->ins[7]);
2266 rw = kernel_stack_up(rw);
2268 instruction_dump ((unsigned int *) regs->tpc);
2270 if (test_thread_flag(TIF_32BIT)) {
2271 regs->tpc &= 0xffffffff;
2272 regs->tnpc &= 0xffffffff;
2274 user_instruction_dump ((unsigned int __user *) regs->tpc);
2276 if (regs->tstate & TSTATE_PRIV)
2280 EXPORT_SYMBOL(die_if_kernel);
2282 #define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2283 #define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2285 extern int handle_popc(u32 insn, struct pt_regs *regs);
2286 extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
2288 void do_illegal_instruction(struct pt_regs *regs)
2290 unsigned long pc = regs->tpc;
2291 unsigned long tstate = regs->tstate;
2295 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2296 0, 0x10, SIGILL) == NOTIFY_STOP)
2299 if (tstate & TSTATE_PRIV)
2300 die_if_kernel("Kernel illegal instruction", regs);
2301 if (test_thread_flag(TIF_32BIT))
2303 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2304 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2305 if (handle_popc(insn, regs))
2307 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2308 if (handle_ldf_stq(insn, regs))
2310 } else if (tlb_type == hypervisor) {
2311 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2312 if (!vis_emul(regs, insn))
2315 struct fpustate *f = FPUSTATE;
2317 /* XXX maybe verify XFSR bits like
2318 * XXX do_fpother() does?
2320 if (do_mathemu(regs, f))
2325 info.si_signo = SIGILL;
2327 info.si_code = ILL_ILLOPC;
2328 info.si_addr = (void __user *)pc;
2330 force_sig_info(SIGILL, &info, current);
2333 extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
2335 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2339 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2340 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2343 if (regs->tstate & TSTATE_PRIV) {
2344 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2347 info.si_signo = SIGBUS;
2349 info.si_code = BUS_ADRALN;
2350 info.si_addr = (void __user *)sfar;
2352 force_sig_info(SIGBUS, &info, current);
2355 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2359 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2360 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2363 if (regs->tstate & TSTATE_PRIV) {
2364 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2367 info.si_signo = SIGBUS;
2369 info.si_code = BUS_ADRALN;
2370 info.si_addr = (void __user *) addr;
2372 force_sig_info(SIGBUS, &info, current);
2375 void do_privop(struct pt_regs *regs)
2379 if (notify_die(DIE_TRAP, "privileged operation", regs,
2380 0, 0x11, SIGILL) == NOTIFY_STOP)
2383 if (test_thread_flag(TIF_32BIT)) {
2384 regs->tpc &= 0xffffffff;
2385 regs->tnpc &= 0xffffffff;
2387 info.si_signo = SIGILL;
2389 info.si_code = ILL_PRVOPC;
2390 info.si_addr = (void __user *)regs->tpc;
2392 force_sig_info(SIGILL, &info, current);
2395 void do_privact(struct pt_regs *regs)
2400 /* Trap level 1 stuff or other traps we should never see... */
2401 void do_cee(struct pt_regs *regs)
2403 die_if_kernel("TL0: Cache Error Exception", regs);
2406 void do_cee_tl1(struct pt_regs *regs)
2408 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2409 die_if_kernel("TL1: Cache Error Exception", regs);
2412 void do_dae_tl1(struct pt_regs *regs)
2414 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2415 die_if_kernel("TL1: Data Access Exception", regs);
2418 void do_iae_tl1(struct pt_regs *regs)
2420 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2421 die_if_kernel("TL1: Instruction Access Exception", regs);
2424 void do_div0_tl1(struct pt_regs *regs)
2426 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2427 die_if_kernel("TL1: DIV0 Exception", regs);
2430 void do_fpdis_tl1(struct pt_regs *regs)
2432 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2433 die_if_kernel("TL1: FPU Disabled", regs);
2436 void do_fpieee_tl1(struct pt_regs *regs)
2438 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2439 die_if_kernel("TL1: FPU IEEE Exception", regs);
2442 void do_fpother_tl1(struct pt_regs *regs)
2444 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2445 die_if_kernel("TL1: FPU Other Exception", regs);
2448 void do_ill_tl1(struct pt_regs *regs)
2450 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2451 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2454 void do_irq_tl1(struct pt_regs *regs)
2456 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2457 die_if_kernel("TL1: IRQ Exception", regs);
2460 void do_lddfmna_tl1(struct pt_regs *regs)
2462 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2463 die_if_kernel("TL1: LDDF Exception", regs);
2466 void do_stdfmna_tl1(struct pt_regs *regs)
2468 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2469 die_if_kernel("TL1: STDF Exception", regs);
2472 void do_paw(struct pt_regs *regs)
2474 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2477 void do_paw_tl1(struct pt_regs *regs)
2479 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2480 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2483 void do_vaw(struct pt_regs *regs)
2485 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2488 void do_vaw_tl1(struct pt_regs *regs)
2490 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2491 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2494 void do_tof_tl1(struct pt_regs *regs)
2496 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2497 die_if_kernel("TL1: Tag Overflow Exception", regs);
2500 void do_getpsr(struct pt_regs *regs)
2502 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2503 regs->tpc = regs->tnpc;
2505 if (test_thread_flag(TIF_32BIT)) {
2506 regs->tpc &= 0xffffffff;
2507 regs->tnpc &= 0xffffffff;
2511 struct trap_per_cpu trap_block[NR_CPUS];
2513 /* This can get invoked before sched_init() so play it super safe
2514 * and use hard_smp_processor_id().
2516 void notrace init_cur_cpu_trap(struct thread_info *t)
2518 int cpu = hard_smp_processor_id();
2519 struct trap_per_cpu *p = &trap_block[cpu];
2525 extern void thread_info_offsets_are_bolixed_dave(void);
2526 extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2527 extern void tsb_config_offsets_are_bolixed_dave(void);
2529 /* Only invoked on boot processor. */
2530 void __init trap_init(void)
2532 /* Compile time sanity check. */
2533 if (TI_TASK != offsetof(struct thread_info, task) ||
2534 TI_FLAGS != offsetof(struct thread_info, flags) ||
2535 TI_CPU != offsetof(struct thread_info, cpu) ||
2536 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2537 TI_KSP != offsetof(struct thread_info, ksp) ||
2538 TI_FAULT_ADDR != offsetof(struct thread_info, fault_address) ||
2539 TI_KREGS != offsetof(struct thread_info, kregs) ||
2540 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2541 TI_EXEC_DOMAIN != offsetof(struct thread_info, exec_domain) ||
2542 TI_REG_WINDOW != offsetof(struct thread_info, reg_window) ||
2543 TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) ||
2544 TI_GSR != offsetof(struct thread_info, gsr) ||
2545 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2546 TI_USER_CNTD0 != offsetof(struct thread_info, user_cntd0) ||
2547 TI_USER_CNTD1 != offsetof(struct thread_info, user_cntd1) ||
2548 TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) ||
2549 TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) ||
2550 TI_PCR != offsetof(struct thread_info, pcr_reg) ||
2551 TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) ||
2552 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2553 TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) ||
2554 TI_RESTART_BLOCK != offsetof(struct thread_info, restart_block) ||
2555 TI_KUNA_REGS != offsetof(struct thread_info, kern_una_regs) ||
2556 TI_KUNA_INSN != offsetof(struct thread_info, kern_una_insn) ||
2557 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2558 (TI_FPREGS & (64 - 1)))
2559 thread_info_offsets_are_bolixed_dave();
2561 if (TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, thread) ||
2562 (TRAP_PER_CPU_PGD_PADDR !=
2563 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2564 (TRAP_PER_CPU_CPU_MONDO_PA !=
2565 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2566 (TRAP_PER_CPU_DEV_MONDO_PA !=
2567 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2568 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2569 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2570 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2571 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2572 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2573 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2574 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2575 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2576 (TRAP_PER_CPU_FAULT_INFO !=
2577 offsetof(struct trap_per_cpu, fault_info)) ||
2578 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2579 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2580 (TRAP_PER_CPU_CPU_LIST_PA !=
2581 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2582 (TRAP_PER_CPU_TSB_HUGE !=
2583 offsetof(struct trap_per_cpu, tsb_huge)) ||
2584 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2585 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2586 (TRAP_PER_CPU_IRQ_WORKLIST_PA !=
2587 offsetof(struct trap_per_cpu, irq_worklist_pa)) ||
2588 (TRAP_PER_CPU_CPU_MONDO_QMASK !=
2589 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) ||
2590 (TRAP_PER_CPU_DEV_MONDO_QMASK !=
2591 offsetof(struct trap_per_cpu, dev_mondo_qmask)) ||
2592 (TRAP_PER_CPU_RESUM_QMASK !=
2593 offsetof(struct trap_per_cpu, resum_qmask)) ||
2594 (TRAP_PER_CPU_NONRESUM_QMASK !=
2595 offsetof(struct trap_per_cpu, nonresum_qmask)))
2596 trap_per_cpu_offsets_are_bolixed_dave();
2598 if ((TSB_CONFIG_TSB !=
2599 offsetof(struct tsb_config, tsb)) ||
2600 (TSB_CONFIG_RSS_LIMIT !=
2601 offsetof(struct tsb_config, tsb_rss_limit)) ||
2602 (TSB_CONFIG_NENTRIES !=
2603 offsetof(struct tsb_config, tsb_nentries)) ||
2604 (TSB_CONFIG_REG_VAL !=
2605 offsetof(struct tsb_config, tsb_reg_val)) ||
2606 (TSB_CONFIG_MAP_VADDR !=
2607 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2608 (TSB_CONFIG_MAP_PTE !=
2609 offsetof(struct tsb_config, tsb_map_pte)))
2610 tsb_config_offsets_are_bolixed_dave();
2612 /* Attach to the address space of init_task. On SMP we
2613 * do this in smp.c:smp_callin for other cpus.
2615 atomic_inc(&init_mm.mm_count);
2616 current->active_mm = &init_mm;