1 /* arch/sparc64/kernel/traps.c
3 * Copyright (C) 1995,1997,2008 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);
133 static DEFINE_SPINLOCK(dimm_handler_lock);
134 static dimm_printer_t dimm_handler;
136 static int sprintf_dimm(int synd_code, unsigned long paddr, char *buf, int buflen)
141 spin_lock_irqsave(&dimm_handler_lock, flags);
143 ret = dimm_handler(synd_code, paddr, buf, buflen);
144 } else if (tlb_type == spitfire) {
145 if (prom_getunumber(synd_code, paddr, buf, buflen) == -1)
151 spin_unlock_irqrestore(&dimm_handler_lock, flags);
156 int register_dimm_printer(dimm_printer_t func)
161 spin_lock_irqsave(&dimm_handler_lock, flags);
166 spin_unlock_irqrestore(&dimm_handler_lock, flags);
170 EXPORT_SYMBOL_GPL(register_dimm_printer);
172 void unregister_dimm_printer(dimm_printer_t func)
176 spin_lock_irqsave(&dimm_handler_lock, flags);
177 if (dimm_handler == func)
179 spin_unlock_irqrestore(&dimm_handler_lock, flags);
181 EXPORT_SYMBOL_GPL(unregister_dimm_printer);
183 void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
187 if (notify_die(DIE_TRAP, "instruction access exception", regs,
188 0, 0x8, SIGTRAP) == NOTIFY_STOP)
191 if (regs->tstate & TSTATE_PRIV) {
192 printk("spitfire_insn_access_exception: SFSR[%016lx] "
193 "SFAR[%016lx], going.\n", sfsr, sfar);
194 die_if_kernel("Iax", regs);
196 if (test_thread_flag(TIF_32BIT)) {
197 regs->tpc &= 0xffffffff;
198 regs->tnpc &= 0xffffffff;
200 info.si_signo = SIGSEGV;
202 info.si_code = SEGV_MAPERR;
203 info.si_addr = (void __user *)regs->tpc;
205 force_sig_info(SIGSEGV, &info, current);
208 void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
210 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
211 0, 0x8, SIGTRAP) == NOTIFY_STOP)
214 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
215 spitfire_insn_access_exception(regs, sfsr, sfar);
218 void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
220 unsigned short type = (type_ctx >> 16);
221 unsigned short ctx = (type_ctx & 0xffff);
224 if (notify_die(DIE_TRAP, "instruction access exception", regs,
225 0, 0x8, SIGTRAP) == NOTIFY_STOP)
228 if (regs->tstate & TSTATE_PRIV) {
229 printk("sun4v_insn_access_exception: ADDR[%016lx] "
230 "CTX[%04x] TYPE[%04x], going.\n",
232 die_if_kernel("Iax", regs);
235 if (test_thread_flag(TIF_32BIT)) {
236 regs->tpc &= 0xffffffff;
237 regs->tnpc &= 0xffffffff;
239 info.si_signo = SIGSEGV;
241 info.si_code = SEGV_MAPERR;
242 info.si_addr = (void __user *) addr;
244 force_sig_info(SIGSEGV, &info, current);
247 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
249 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
250 0, 0x8, SIGTRAP) == NOTIFY_STOP)
253 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
254 sun4v_insn_access_exception(regs, addr, type_ctx);
257 void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
261 if (notify_die(DIE_TRAP, "data access exception", regs,
262 0, 0x30, SIGTRAP) == NOTIFY_STOP)
265 if (regs->tstate & TSTATE_PRIV) {
266 /* Test if this comes from uaccess places. */
267 const struct exception_table_entry *entry;
269 entry = search_exception_tables(regs->tpc);
271 /* Ouch, somebody is trying VM hole tricks on us... */
272 #ifdef DEBUG_EXCEPTIONS
273 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
274 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
275 regs->tpc, entry->fixup);
277 regs->tpc = entry->fixup;
278 regs->tnpc = regs->tpc + 4;
282 printk("spitfire_data_access_exception: SFSR[%016lx] "
283 "SFAR[%016lx], going.\n", sfsr, sfar);
284 die_if_kernel("Dax", regs);
287 info.si_signo = SIGSEGV;
289 info.si_code = SEGV_MAPERR;
290 info.si_addr = (void __user *)sfar;
292 force_sig_info(SIGSEGV, &info, current);
295 void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
297 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
298 0, 0x30, SIGTRAP) == NOTIFY_STOP)
301 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
302 spitfire_data_access_exception(regs, sfsr, sfar);
305 void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
307 unsigned short type = (type_ctx >> 16);
308 unsigned short ctx = (type_ctx & 0xffff);
311 if (notify_die(DIE_TRAP, "data access exception", regs,
312 0, 0x8, SIGTRAP) == NOTIFY_STOP)
315 if (regs->tstate & TSTATE_PRIV) {
316 printk("sun4v_data_access_exception: ADDR[%016lx] "
317 "CTX[%04x] TYPE[%04x], going.\n",
319 die_if_kernel("Dax", regs);
322 if (test_thread_flag(TIF_32BIT)) {
323 regs->tpc &= 0xffffffff;
324 regs->tnpc &= 0xffffffff;
326 info.si_signo = SIGSEGV;
328 info.si_code = SEGV_MAPERR;
329 info.si_addr = (void __user *) addr;
331 force_sig_info(SIGSEGV, &info, current);
334 void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
336 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
337 0, 0x8, SIGTRAP) == NOTIFY_STOP)
340 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
341 sun4v_data_access_exception(regs, addr, type_ctx);
345 #include "pci_impl.h"
348 /* When access exceptions happen, we must do this. */
349 static void spitfire_clean_and_reenable_l1_caches(void)
353 if (tlb_type != spitfire)
357 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
358 spitfire_put_icache_tag(va, 0x0);
359 spitfire_put_dcache_tag(va, 0x0);
362 /* Re-enable in LSU. */
363 __asm__ __volatile__("flush %%g6\n\t"
365 "stxa %0, [%%g0] %1\n\t"
368 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
369 LSU_CONTROL_IM | LSU_CONTROL_DM),
370 "i" (ASI_LSU_CONTROL)
374 static void spitfire_enable_estate_errors(void)
376 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
379 : "r" (ESTATE_ERR_ALL),
380 "i" (ASI_ESTATE_ERROR_EN));
383 static char ecc_syndrome_table[] = {
384 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
385 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
386 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
387 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
388 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
389 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
390 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
391 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
392 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
393 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
394 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
395 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
396 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
397 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
398 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
399 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
400 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
401 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
402 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
403 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
404 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
405 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
406 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
407 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
408 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
409 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
410 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
411 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
412 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
413 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
414 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
415 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
418 static char *syndrome_unknown = "<Unknown>";
420 static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
422 unsigned short scode;
423 char memmod_str[64], *p;
426 scode = ecc_syndrome_table[udbl & 0xff];
427 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
428 p = syndrome_unknown;
431 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
432 "Memory Module \"%s\"\n",
433 smp_processor_id(), scode, p);
437 scode = ecc_syndrome_table[udbh & 0xff];
438 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
439 p = syndrome_unknown;
442 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
443 "Memory Module \"%s\"\n",
444 smp_processor_id(), scode, p);
449 static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
452 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
453 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
454 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
456 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
458 /* We always log it, even if someone is listening for this
461 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
462 0, TRAP_TYPE_CEE, SIGTRAP);
464 /* The Correctable ECC Error trap does not disable I/D caches. So
465 * we only have to restore the ESTATE Error Enable register.
467 spitfire_enable_estate_errors();
470 static void spitfire_ue_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long tt, int tl1, struct pt_regs *regs)
474 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
475 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
476 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
478 /* XXX add more human friendly logging of the error status
479 * XXX as is implemented for cheetah
482 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
484 /* We always log it, even if someone is listening for this
487 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
490 if (regs->tstate & TSTATE_PRIV) {
492 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
493 die_if_kernel("UE", regs);
496 /* XXX need more intelligent processing here, such as is implemented
497 * XXX for cheetah errors, in fact if the E-cache still holds the
498 * XXX line with bad parity this will loop
501 spitfire_clean_and_reenable_l1_caches();
502 spitfire_enable_estate_errors();
504 if (test_thread_flag(TIF_32BIT)) {
505 regs->tpc &= 0xffffffff;
506 regs->tnpc &= 0xffffffff;
508 info.si_signo = SIGBUS;
510 info.si_code = BUS_OBJERR;
511 info.si_addr = (void *)0;
513 force_sig_info(SIGBUS, &info, current);
516 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
518 unsigned long afsr, tt, udbh, udbl;
521 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
522 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
523 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
524 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
525 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
528 if (tt == TRAP_TYPE_DAE &&
529 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
530 spitfire_clean_and_reenable_l1_caches();
531 spitfire_enable_estate_errors();
533 pci_poke_faulted = 1;
534 regs->tnpc = regs->tpc + 4;
539 if (afsr & SFAFSR_UE)
540 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
542 if (tt == TRAP_TYPE_CEE) {
543 /* Handle the case where we took a CEE trap, but ACK'd
544 * only the UE state in the UDB error registers.
546 if (afsr & SFAFSR_UE) {
547 if (udbh & UDBE_CE) {
548 __asm__ __volatile__(
549 "stxa %0, [%1] %2\n\t"
552 : "r" (udbh & UDBE_CE),
553 "r" (0x0), "i" (ASI_UDB_ERROR_W));
555 if (udbl & UDBE_CE) {
556 __asm__ __volatile__(
557 "stxa %0, [%1] %2\n\t"
560 : "r" (udbl & UDBE_CE),
561 "r" (0x18), "i" (ASI_UDB_ERROR_W));
565 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
569 int cheetah_pcache_forced_on;
571 void cheetah_enable_pcache(void)
575 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
578 __asm__ __volatile__("ldxa [%%g0] %1, %0"
580 : "i" (ASI_DCU_CONTROL_REG));
581 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
582 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
585 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
588 /* Cheetah error trap handling. */
589 static unsigned long ecache_flush_physbase;
590 static unsigned long ecache_flush_linesize;
591 static unsigned long ecache_flush_size;
593 /* This table is ordered in priority of errors and matches the
594 * AFAR overwrite policy as well.
597 struct afsr_error_table {
602 static const char CHAFSR_PERR_msg[] =
603 "System interface protocol error";
604 static const char CHAFSR_IERR_msg[] =
605 "Internal processor error";
606 static const char CHAFSR_ISAP_msg[] =
607 "System request parity error on incoming addresss";
608 static const char CHAFSR_UCU_msg[] =
609 "Uncorrectable E-cache ECC error for ifetch/data";
610 static const char CHAFSR_UCC_msg[] =
611 "SW Correctable E-cache ECC error for ifetch/data";
612 static const char CHAFSR_UE_msg[] =
613 "Uncorrectable system bus data ECC error for read";
614 static const char CHAFSR_EDU_msg[] =
615 "Uncorrectable E-cache ECC error for stmerge/blkld";
616 static const char CHAFSR_EMU_msg[] =
617 "Uncorrectable system bus MTAG error";
618 static const char CHAFSR_WDU_msg[] =
619 "Uncorrectable E-cache ECC error for writeback";
620 static const char CHAFSR_CPU_msg[] =
621 "Uncorrectable ECC error for copyout";
622 static const char CHAFSR_CE_msg[] =
623 "HW corrected system bus data ECC error for read";
624 static const char CHAFSR_EDC_msg[] =
625 "HW corrected E-cache ECC error for stmerge/blkld";
626 static const char CHAFSR_EMC_msg[] =
627 "HW corrected system bus MTAG ECC error";
628 static const char CHAFSR_WDC_msg[] =
629 "HW corrected E-cache ECC error for writeback";
630 static const char CHAFSR_CPC_msg[] =
631 "HW corrected ECC error for copyout";
632 static const char CHAFSR_TO_msg[] =
633 "Unmapped error from system bus";
634 static const char CHAFSR_BERR_msg[] =
635 "Bus error response from system bus";
636 static const char CHAFSR_IVC_msg[] =
637 "HW corrected system bus data ECC error for ivec read";
638 static const char CHAFSR_IVU_msg[] =
639 "Uncorrectable system bus data ECC error for ivec read";
640 static struct afsr_error_table __cheetah_error_table[] = {
641 { CHAFSR_PERR, CHAFSR_PERR_msg },
642 { CHAFSR_IERR, CHAFSR_IERR_msg },
643 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
644 { CHAFSR_UCU, CHAFSR_UCU_msg },
645 { CHAFSR_UCC, CHAFSR_UCC_msg },
646 { CHAFSR_UE, CHAFSR_UE_msg },
647 { CHAFSR_EDU, CHAFSR_EDU_msg },
648 { CHAFSR_EMU, CHAFSR_EMU_msg },
649 { CHAFSR_WDU, CHAFSR_WDU_msg },
650 { CHAFSR_CPU, CHAFSR_CPU_msg },
651 { CHAFSR_CE, CHAFSR_CE_msg },
652 { CHAFSR_EDC, CHAFSR_EDC_msg },
653 { CHAFSR_EMC, CHAFSR_EMC_msg },
654 { CHAFSR_WDC, CHAFSR_WDC_msg },
655 { CHAFSR_CPC, CHAFSR_CPC_msg },
656 { CHAFSR_TO, CHAFSR_TO_msg },
657 { CHAFSR_BERR, CHAFSR_BERR_msg },
658 /* These two do not update the AFAR. */
659 { CHAFSR_IVC, CHAFSR_IVC_msg },
660 { CHAFSR_IVU, CHAFSR_IVU_msg },
663 static const char CHPAFSR_DTO_msg[] =
664 "System bus unmapped error for prefetch/storequeue-read";
665 static const char CHPAFSR_DBERR_msg[] =
666 "System bus error for prefetch/storequeue-read";
667 static const char CHPAFSR_THCE_msg[] =
668 "Hardware corrected E-cache Tag ECC error";
669 static const char CHPAFSR_TSCE_msg[] =
670 "SW handled correctable E-cache Tag ECC error";
671 static const char CHPAFSR_TUE_msg[] =
672 "Uncorrectable E-cache Tag ECC error";
673 static const char CHPAFSR_DUE_msg[] =
674 "System bus uncorrectable data ECC error due to prefetch/store-fill";
675 static struct afsr_error_table __cheetah_plus_error_table[] = {
676 { CHAFSR_PERR, CHAFSR_PERR_msg },
677 { CHAFSR_IERR, CHAFSR_IERR_msg },
678 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
679 { CHAFSR_UCU, CHAFSR_UCU_msg },
680 { CHAFSR_UCC, CHAFSR_UCC_msg },
681 { CHAFSR_UE, CHAFSR_UE_msg },
682 { CHAFSR_EDU, CHAFSR_EDU_msg },
683 { CHAFSR_EMU, CHAFSR_EMU_msg },
684 { CHAFSR_WDU, CHAFSR_WDU_msg },
685 { CHAFSR_CPU, CHAFSR_CPU_msg },
686 { CHAFSR_CE, CHAFSR_CE_msg },
687 { CHAFSR_EDC, CHAFSR_EDC_msg },
688 { CHAFSR_EMC, CHAFSR_EMC_msg },
689 { CHAFSR_WDC, CHAFSR_WDC_msg },
690 { CHAFSR_CPC, CHAFSR_CPC_msg },
691 { CHAFSR_TO, CHAFSR_TO_msg },
692 { CHAFSR_BERR, CHAFSR_BERR_msg },
693 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
694 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
695 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
696 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
697 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
698 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
699 /* These two do not update the AFAR. */
700 { CHAFSR_IVC, CHAFSR_IVC_msg },
701 { CHAFSR_IVU, CHAFSR_IVU_msg },
704 static const char JPAFSR_JETO_msg[] =
705 "System interface protocol error, hw timeout caused";
706 static const char JPAFSR_SCE_msg[] =
707 "Parity error on system snoop results";
708 static const char JPAFSR_JEIC_msg[] =
709 "System interface protocol error, illegal command detected";
710 static const char JPAFSR_JEIT_msg[] =
711 "System interface protocol error, illegal ADTYPE detected";
712 static const char JPAFSR_OM_msg[] =
713 "Out of range memory error has occurred";
714 static const char JPAFSR_ETP_msg[] =
715 "Parity error on L2 cache tag SRAM";
716 static const char JPAFSR_UMS_msg[] =
717 "Error due to unsupported store";
718 static const char JPAFSR_RUE_msg[] =
719 "Uncorrectable ECC error from remote cache/memory";
720 static const char JPAFSR_RCE_msg[] =
721 "Correctable ECC error from remote cache/memory";
722 static const char JPAFSR_BP_msg[] =
723 "JBUS parity error on returned read data";
724 static const char JPAFSR_WBP_msg[] =
725 "JBUS parity error on data for writeback or block store";
726 static const char JPAFSR_FRC_msg[] =
727 "Foreign read to DRAM incurring correctable ECC error";
728 static const char JPAFSR_FRU_msg[] =
729 "Foreign read to DRAM incurring uncorrectable ECC error";
730 static struct afsr_error_table __jalapeno_error_table[] = {
731 { JPAFSR_JETO, JPAFSR_JETO_msg },
732 { JPAFSR_SCE, JPAFSR_SCE_msg },
733 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
734 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
735 { CHAFSR_PERR, CHAFSR_PERR_msg },
736 { CHAFSR_IERR, CHAFSR_IERR_msg },
737 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
738 { CHAFSR_UCU, CHAFSR_UCU_msg },
739 { CHAFSR_UCC, CHAFSR_UCC_msg },
740 { CHAFSR_UE, CHAFSR_UE_msg },
741 { CHAFSR_EDU, CHAFSR_EDU_msg },
742 { JPAFSR_OM, JPAFSR_OM_msg },
743 { CHAFSR_WDU, CHAFSR_WDU_msg },
744 { CHAFSR_CPU, CHAFSR_CPU_msg },
745 { CHAFSR_CE, CHAFSR_CE_msg },
746 { CHAFSR_EDC, CHAFSR_EDC_msg },
747 { JPAFSR_ETP, JPAFSR_ETP_msg },
748 { CHAFSR_WDC, CHAFSR_WDC_msg },
749 { CHAFSR_CPC, CHAFSR_CPC_msg },
750 { CHAFSR_TO, CHAFSR_TO_msg },
751 { CHAFSR_BERR, CHAFSR_BERR_msg },
752 { JPAFSR_UMS, JPAFSR_UMS_msg },
753 { JPAFSR_RUE, JPAFSR_RUE_msg },
754 { JPAFSR_RCE, JPAFSR_RCE_msg },
755 { JPAFSR_BP, JPAFSR_BP_msg },
756 { JPAFSR_WBP, JPAFSR_WBP_msg },
757 { JPAFSR_FRC, JPAFSR_FRC_msg },
758 { JPAFSR_FRU, JPAFSR_FRU_msg },
759 /* These two do not update the AFAR. */
760 { CHAFSR_IVU, CHAFSR_IVU_msg },
763 static struct afsr_error_table *cheetah_error_table;
764 static unsigned long cheetah_afsr_errors;
766 struct cheetah_err_info *cheetah_error_log;
768 static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
770 struct cheetah_err_info *p;
771 int cpu = smp_processor_id();
773 if (!cheetah_error_log)
776 p = cheetah_error_log + (cpu * 2);
777 if ((afsr & CHAFSR_TL1) != 0UL)
783 extern unsigned int tl0_icpe[], tl1_icpe[];
784 extern unsigned int tl0_dcpe[], tl1_dcpe[];
785 extern unsigned int tl0_fecc[], tl1_fecc[];
786 extern unsigned int tl0_cee[], tl1_cee[];
787 extern unsigned int tl0_iae[], tl1_iae[];
788 extern unsigned int tl0_dae[], tl1_dae[];
789 extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
790 extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
791 extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
792 extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
793 extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
795 void __init cheetah_ecache_flush_init(void)
797 unsigned long largest_size, smallest_linesize, order, ver;
800 /* Scan all cpu device tree nodes, note two values:
801 * 1) largest E-cache size
802 * 2) smallest E-cache line size
805 smallest_linesize = ~0UL;
807 for (i = 0; i < NR_CPUS; i++) {
810 val = cpu_data(i).ecache_size;
814 if (val > largest_size)
817 val = cpu_data(i).ecache_line_size;
818 if (val < smallest_linesize)
819 smallest_linesize = val;
823 if (largest_size == 0UL || smallest_linesize == ~0UL) {
824 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
829 ecache_flush_size = (2 * largest_size);
830 ecache_flush_linesize = smallest_linesize;
832 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
834 if (ecache_flush_physbase == ~0UL) {
835 prom_printf("cheetah_ecache_flush_init: Cannot find %d byte "
836 "contiguous physical memory.\n",
841 /* Now allocate error trap reporting scoreboard. */
842 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
843 for (order = 0; order < MAX_ORDER; order++) {
844 if ((PAGE_SIZE << order) >= sz)
847 cheetah_error_log = (struct cheetah_err_info *)
848 __get_free_pages(GFP_KERNEL, order);
849 if (!cheetah_error_log) {
850 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
851 "error logging scoreboard (%d bytes).\n", sz);
854 memset(cheetah_error_log, 0, PAGE_SIZE << order);
856 /* Mark all AFSRs as invalid so that the trap handler will
857 * log new new information there.
859 for (i = 0; i < 2 * NR_CPUS; i++)
860 cheetah_error_log[i].afsr = CHAFSR_INVALID;
862 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
863 if ((ver >> 32) == __JALAPENO_ID ||
864 (ver >> 32) == __SERRANO_ID) {
865 cheetah_error_table = &__jalapeno_error_table[0];
866 cheetah_afsr_errors = JPAFSR_ERRORS;
867 } else if ((ver >> 32) == 0x003e0015) {
868 cheetah_error_table = &__cheetah_plus_error_table[0];
869 cheetah_afsr_errors = CHPAFSR_ERRORS;
871 cheetah_error_table = &__cheetah_error_table[0];
872 cheetah_afsr_errors = CHAFSR_ERRORS;
875 /* Now patch trap tables. */
876 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
877 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
878 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
879 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
880 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
881 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
882 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
883 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
884 if (tlb_type == cheetah_plus) {
885 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
886 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
887 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
888 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
893 static void cheetah_flush_ecache(void)
895 unsigned long flush_base = ecache_flush_physbase;
896 unsigned long flush_linesize = ecache_flush_linesize;
897 unsigned long flush_size = ecache_flush_size;
899 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
900 " bne,pt %%xcc, 1b\n\t"
901 " ldxa [%2 + %0] %3, %%g0\n\t"
903 : "0" (flush_size), "r" (flush_base),
904 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
907 static void cheetah_flush_ecache_line(unsigned long physaddr)
911 physaddr &= ~(8UL - 1UL);
912 physaddr = (ecache_flush_physbase +
913 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
914 alias = physaddr + (ecache_flush_size >> 1UL);
915 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
916 "ldxa [%1] %2, %%g0\n\t"
919 : "r" (physaddr), "r" (alias),
920 "i" (ASI_PHYS_USE_EC));
923 /* Unfortunately, the diagnostic access to the I-cache tags we need to
924 * use to clear the thing interferes with I-cache coherency transactions.
926 * So we must only flush the I-cache when it is disabled.
928 static void __cheetah_flush_icache(void)
930 unsigned int icache_size, icache_line_size;
933 icache_size = local_cpu_data().icache_size;
934 icache_line_size = local_cpu_data().icache_line_size;
936 /* Clear the valid bits in all the tags. */
937 for (addr = 0; addr < icache_size; addr += icache_line_size) {
938 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
941 : "r" (addr | (2 << 3)),
946 static void cheetah_flush_icache(void)
948 unsigned long dcu_save;
950 /* Save current DCU, disable I-cache. */
951 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
952 "or %0, %2, %%g1\n\t"
953 "stxa %%g1, [%%g0] %1\n\t"
956 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
959 __cheetah_flush_icache();
961 /* Restore DCU register */
962 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
965 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
968 static void cheetah_flush_dcache(void)
970 unsigned int dcache_size, dcache_line_size;
973 dcache_size = local_cpu_data().dcache_size;
974 dcache_line_size = local_cpu_data().dcache_line_size;
976 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
977 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
980 : "r" (addr), "i" (ASI_DCACHE_TAG));
984 /* In order to make the even parity correct we must do two things.
985 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
986 * Next, we clear out all 32-bytes of data for that line. Data of
987 * all-zero + tag parity value of zero == correct parity.
989 static void cheetah_plus_zap_dcache_parity(void)
991 unsigned int dcache_size, dcache_line_size;
994 dcache_size = local_cpu_data().dcache_size;
995 dcache_line_size = local_cpu_data().dcache_line_size;
997 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
998 unsigned long tag = (addr >> 14);
1001 __asm__ __volatile__("membar #Sync\n\t"
1002 "stxa %0, [%1] %2\n\t"
1005 : "r" (tag), "r" (addr),
1006 "i" (ASI_DCACHE_UTAG));
1007 for (line = addr; line < addr + dcache_line_size; line += 8)
1008 __asm__ __volatile__("membar #Sync\n\t"
1009 "stxa %%g0, [%0] %1\n\t"
1013 "i" (ASI_DCACHE_DATA));
1017 /* Conversion tables used to frob Cheetah AFSR syndrome values into
1018 * something palatable to the memory controller driver get_unumber
1042 static unsigned char cheetah_ecc_syntab[] = {
1043 /*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1044 /*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1045 /*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1046 /*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1047 /*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1048 /*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1049 /*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1050 /*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1051 /*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1052 /*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1053 /*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1054 /*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1055 /*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1056 /*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1057 /*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1058 /*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1059 /*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1060 /*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1061 /*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1062 /*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1063 /*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1064 /*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1065 /*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1066 /*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1067 /*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1068 /*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1069 /*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1070 /*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1071 /*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1072 /*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1073 /*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1074 /*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1076 static unsigned char cheetah_mtag_syntab[] = {
1087 /* Return the highest priority error conditon mentioned. */
1088 static inline unsigned long cheetah_get_hipri(unsigned long afsr)
1090 unsigned long tmp = 0;
1093 for (i = 0; cheetah_error_table[i].mask; i++) {
1094 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1100 static const char *cheetah_get_string(unsigned long bit)
1104 for (i = 0; cheetah_error_table[i].mask; i++) {
1105 if ((bit & cheetah_error_table[i].mask) != 0UL)
1106 return cheetah_error_table[i].name;
1111 static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1112 unsigned long afsr, unsigned long afar, int recoverable)
1114 unsigned long hipri;
1117 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1118 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1120 (afsr & CHAFSR_TL1) ? 1 : 0);
1121 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1122 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1123 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1124 printk("%s" "ERROR(%d): ",
1125 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1126 printk("TPC<%pS>\n", (void *) regs->tpc);
1127 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1128 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1129 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1130 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1131 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1132 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1133 hipri = cheetah_get_hipri(afsr);
1134 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1135 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1136 hipri, cheetah_get_string(hipri));
1138 /* Try to get unumber if relevant. */
1139 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1140 CHAFSR_CPC | CHAFSR_CPU | \
1141 CHAFSR_UE | CHAFSR_CE | \
1142 CHAFSR_EDC | CHAFSR_EDU | \
1143 CHAFSR_UCC | CHAFSR_UCU | \
1144 CHAFSR_WDU | CHAFSR_WDC)
1145 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1146 if (afsr & ESYND_ERRORS) {
1150 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1151 syndrome = cheetah_ecc_syntab[syndrome];
1152 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1154 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1155 (recoverable ? KERN_WARNING : KERN_CRIT),
1156 smp_processor_id(), unum);
1157 } else if (afsr & MSYND_ERRORS) {
1161 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1162 syndrome = cheetah_mtag_syntab[syndrome];
1163 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1165 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1166 (recoverable ? KERN_WARNING : KERN_CRIT),
1167 smp_processor_id(), unum);
1170 /* Now dump the cache snapshots. */
1171 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx]\n",
1172 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1173 (int) info->dcache_index,
1177 printk("%s" "ERROR(%d): D-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1178 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1179 info->dcache_data[0],
1180 info->dcache_data[1],
1181 info->dcache_data[2],
1182 info->dcache_data[3]);
1183 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx] "
1184 "u[%016lx] l[%016lx]\n",
1185 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1186 (int) info->icache_index,
1191 info->icache_lower);
1192 printk("%s" "ERROR(%d): I-cache INSN0[%016lx] INSN1[%016lx] INSN2[%016lx] INSN3[%016lx]\n",
1193 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1194 info->icache_data[0],
1195 info->icache_data[1],
1196 info->icache_data[2],
1197 info->icache_data[3]);
1198 printk("%s" "ERROR(%d): I-cache INSN4[%016lx] INSN5[%016lx] INSN6[%016lx] INSN7[%016lx]\n",
1199 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1200 info->icache_data[4],
1201 info->icache_data[5],
1202 info->icache_data[6],
1203 info->icache_data[7]);
1204 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016lx]\n",
1205 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1206 (int) info->ecache_index, info->ecache_tag);
1207 printk("%s" "ERROR(%d): E-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1208 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1209 info->ecache_data[0],
1210 info->ecache_data[1],
1211 info->ecache_data[2],
1212 info->ecache_data[3]);
1214 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1215 while (afsr != 0UL) {
1216 unsigned long bit = cheetah_get_hipri(afsr);
1218 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1219 (recoverable ? KERN_WARNING : KERN_CRIT),
1220 bit, cheetah_get_string(bit));
1226 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1229 static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1231 unsigned long afsr, afar;
1234 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1237 if ((afsr & cheetah_afsr_errors) != 0) {
1239 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1247 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1249 : : "r" (afsr), "i" (ASI_AFSR));
1254 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1256 struct cheetah_err_info local_snapshot, *p;
1260 cheetah_flush_ecache();
1262 p = cheetah_get_error_log(afsr);
1264 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1266 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1267 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1271 /* Grab snapshot of logged error. */
1272 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1274 /* If the current trap snapshot does not match what the
1275 * trap handler passed along into our args, big trouble.
1276 * In such a case, mark the local copy as invalid.
1278 * Else, it matches and we mark the afsr in the non-local
1279 * copy as invalid so we may log new error traps there.
1281 if (p->afsr != afsr || p->afar != afar)
1282 local_snapshot.afsr = CHAFSR_INVALID;
1284 p->afsr = CHAFSR_INVALID;
1286 cheetah_flush_icache();
1287 cheetah_flush_dcache();
1289 /* Re-enable I-cache/D-cache */
1290 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1291 "or %%g1, %1, %%g1\n\t"
1292 "stxa %%g1, [%%g0] %0\n\t"
1295 : "i" (ASI_DCU_CONTROL_REG),
1296 "i" (DCU_DC | DCU_IC)
1299 /* Re-enable error reporting */
1300 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1301 "or %%g1, %1, %%g1\n\t"
1302 "stxa %%g1, [%%g0] %0\n\t"
1305 : "i" (ASI_ESTATE_ERROR_EN),
1306 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1309 /* Decide if we can continue after handling this trap and
1310 * logging the error.
1313 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1316 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1317 * error was logged while we had error reporting traps disabled.
1319 if (cheetah_recheck_errors(&local_snapshot)) {
1320 unsigned long new_afsr = local_snapshot.afsr;
1322 /* If we got a new asynchronous error, die... */
1323 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1324 CHAFSR_WDU | CHAFSR_CPU |
1325 CHAFSR_IVU | CHAFSR_UE |
1326 CHAFSR_BERR | CHAFSR_TO))
1331 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1334 panic("Irrecoverable Fast-ECC error trap.\n");
1336 /* Flush E-cache to kick the error trap handlers out. */
1337 cheetah_flush_ecache();
1340 /* Try to fix a correctable error by pushing the line out from
1341 * the E-cache. Recheck error reporting registers to see if the
1342 * problem is intermittent.
1344 static int cheetah_fix_ce(unsigned long physaddr)
1346 unsigned long orig_estate;
1347 unsigned long alias1, alias2;
1350 /* Make sure correctable error traps are disabled. */
1351 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1352 "andn %0, %1, %%g1\n\t"
1353 "stxa %%g1, [%%g0] %2\n\t"
1355 : "=&r" (orig_estate)
1356 : "i" (ESTATE_ERROR_CEEN),
1357 "i" (ASI_ESTATE_ERROR_EN)
1360 /* We calculate alias addresses that will force the
1361 * cache line in question out of the E-cache. Then
1362 * we bring it back in with an atomic instruction so
1363 * that we get it in some modified/exclusive state,
1364 * then we displace it again to try and get proper ECC
1365 * pushed back into the system.
1367 physaddr &= ~(8UL - 1UL);
1368 alias1 = (ecache_flush_physbase +
1369 (physaddr & ((ecache_flush_size >> 1) - 1)));
1370 alias2 = alias1 + (ecache_flush_size >> 1);
1371 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1372 "ldxa [%1] %3, %%g0\n\t"
1373 "casxa [%2] %3, %%g0, %%g0\n\t"
1374 "ldxa [%0] %3, %%g0\n\t"
1375 "ldxa [%1] %3, %%g0\n\t"
1378 : "r" (alias1), "r" (alias2),
1379 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1381 /* Did that trigger another error? */
1382 if (cheetah_recheck_errors(NULL)) {
1383 /* Try one more time. */
1384 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1386 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1387 if (cheetah_recheck_errors(NULL))
1392 /* No new error, intermittent problem. */
1396 /* Restore error enables. */
1397 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1399 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1404 /* Return non-zero if PADDR is a valid physical memory address. */
1405 static int cheetah_check_main_memory(unsigned long paddr)
1407 unsigned long vaddr = PAGE_OFFSET + paddr;
1409 if (vaddr > (unsigned long) high_memory)
1412 return kern_addr_valid(vaddr);
1415 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1417 struct cheetah_err_info local_snapshot, *p;
1418 int recoverable, is_memory;
1420 p = cheetah_get_error_log(afsr);
1422 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1424 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1425 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1429 /* Grab snapshot of logged error. */
1430 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1432 /* If the current trap snapshot does not match what the
1433 * trap handler passed along into our args, big trouble.
1434 * In such a case, mark the local copy as invalid.
1436 * Else, it matches and we mark the afsr in the non-local
1437 * copy as invalid so we may log new error traps there.
1439 if (p->afsr != afsr || p->afar != afar)
1440 local_snapshot.afsr = CHAFSR_INVALID;
1442 p->afsr = CHAFSR_INVALID;
1444 is_memory = cheetah_check_main_memory(afar);
1446 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1447 /* XXX Might want to log the results of this operation
1448 * XXX somewhere... -DaveM
1450 cheetah_fix_ce(afar);
1454 int flush_all, flush_line;
1456 flush_all = flush_line = 0;
1457 if ((afsr & CHAFSR_EDC) != 0UL) {
1458 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1462 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1463 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1469 /* Trap handler only disabled I-cache, flush it. */
1470 cheetah_flush_icache();
1472 /* Re-enable I-cache */
1473 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1474 "or %%g1, %1, %%g1\n\t"
1475 "stxa %%g1, [%%g0] %0\n\t"
1478 : "i" (ASI_DCU_CONTROL_REG),
1483 cheetah_flush_ecache();
1484 else if (flush_line)
1485 cheetah_flush_ecache_line(afar);
1488 /* Re-enable error reporting */
1489 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1490 "or %%g1, %1, %%g1\n\t"
1491 "stxa %%g1, [%%g0] %0\n\t"
1494 : "i" (ASI_ESTATE_ERROR_EN),
1495 "i" (ESTATE_ERROR_CEEN)
1498 /* Decide if we can continue after handling this trap and
1499 * logging the error.
1502 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1505 /* Re-check AFSR/AFAR */
1506 (void) cheetah_recheck_errors(&local_snapshot);
1509 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1512 panic("Irrecoverable Correctable-ECC error trap.\n");
1515 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1517 struct cheetah_err_info local_snapshot, *p;
1518 int recoverable, is_memory;
1521 /* Check for the special PCI poke sequence. */
1522 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1523 cheetah_flush_icache();
1524 cheetah_flush_dcache();
1526 /* Re-enable I-cache/D-cache */
1527 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1528 "or %%g1, %1, %%g1\n\t"
1529 "stxa %%g1, [%%g0] %0\n\t"
1532 : "i" (ASI_DCU_CONTROL_REG),
1533 "i" (DCU_DC | DCU_IC)
1536 /* Re-enable error reporting */
1537 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1538 "or %%g1, %1, %%g1\n\t"
1539 "stxa %%g1, [%%g0] %0\n\t"
1542 : "i" (ASI_ESTATE_ERROR_EN),
1543 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1546 (void) cheetah_recheck_errors(NULL);
1548 pci_poke_faulted = 1;
1550 regs->tnpc = regs->tpc + 4;
1555 p = cheetah_get_error_log(afsr);
1557 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1559 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1560 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1564 /* Grab snapshot of logged error. */
1565 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1567 /* If the current trap snapshot does not match what the
1568 * trap handler passed along into our args, big trouble.
1569 * In such a case, mark the local copy as invalid.
1571 * Else, it matches and we mark the afsr in the non-local
1572 * copy as invalid so we may log new error traps there.
1574 if (p->afsr != afsr || p->afar != afar)
1575 local_snapshot.afsr = CHAFSR_INVALID;
1577 p->afsr = CHAFSR_INVALID;
1579 is_memory = cheetah_check_main_memory(afar);
1582 int flush_all, flush_line;
1584 flush_all = flush_line = 0;
1585 if ((afsr & CHAFSR_EDU) != 0UL) {
1586 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1590 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1591 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1597 cheetah_flush_icache();
1598 cheetah_flush_dcache();
1600 /* Re-enable I/D caches */
1601 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1602 "or %%g1, %1, %%g1\n\t"
1603 "stxa %%g1, [%%g0] %0\n\t"
1606 : "i" (ASI_DCU_CONTROL_REG),
1607 "i" (DCU_IC | DCU_DC)
1611 cheetah_flush_ecache();
1612 else if (flush_line)
1613 cheetah_flush_ecache_line(afar);
1616 /* Re-enable error reporting */
1617 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1618 "or %%g1, %1, %%g1\n\t"
1619 "stxa %%g1, [%%g0] %0\n\t"
1622 : "i" (ASI_ESTATE_ERROR_EN),
1623 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1626 /* Decide if we can continue after handling this trap and
1627 * logging the error.
1630 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1633 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1634 * error was logged while we had error reporting traps disabled.
1636 if (cheetah_recheck_errors(&local_snapshot)) {
1637 unsigned long new_afsr = local_snapshot.afsr;
1639 /* If we got a new asynchronous error, die... */
1640 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1641 CHAFSR_WDU | CHAFSR_CPU |
1642 CHAFSR_IVU | CHAFSR_UE |
1643 CHAFSR_BERR | CHAFSR_TO))
1648 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1650 /* "Recoverable" here means we try to yank the page from ever
1651 * being newly used again. This depends upon a few things:
1652 * 1) Must be main memory, and AFAR must be valid.
1653 * 2) If we trapped from user, OK.
1654 * 3) Else, if we trapped from kernel we must find exception
1655 * table entry (ie. we have to have been accessing user
1658 * If AFAR is not in main memory, or we trapped from kernel
1659 * and cannot find an exception table entry, it is unacceptable
1660 * to try and continue.
1662 if (recoverable && is_memory) {
1663 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1664 /* OK, usermode access. */
1667 const struct exception_table_entry *entry;
1669 entry = search_exception_tables(regs->tpc);
1671 /* OK, kernel access to userspace. */
1675 /* BAD, privileged state is corrupted. */
1680 if (pfn_valid(afar >> PAGE_SHIFT))
1681 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1685 /* Only perform fixup if we still have a
1686 * recoverable condition.
1689 regs->tpc = entry->fixup;
1690 regs->tnpc = regs->tpc + 4;
1699 panic("Irrecoverable deferred error trap.\n");
1702 /* Handle a D/I cache parity error trap. TYPE is encoded as:
1704 * Bit0: 0=dcache,1=icache
1705 * Bit1: 0=recoverable,1=unrecoverable
1707 * The hardware has disabled both the I-cache and D-cache in
1708 * the %dcr register.
1710 void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1713 __cheetah_flush_icache();
1715 cheetah_plus_zap_dcache_parity();
1716 cheetah_flush_dcache();
1718 /* Re-enable I-cache/D-cache */
1719 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1720 "or %%g1, %1, %%g1\n\t"
1721 "stxa %%g1, [%%g0] %0\n\t"
1724 : "i" (ASI_DCU_CONTROL_REG),
1725 "i" (DCU_DC | DCU_IC)
1729 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1731 (type & 0x1) ? 'I' : 'D',
1733 printk(KERN_EMERG "TPC<%pS>\n", (void *) regs->tpc);
1734 panic("Irrecoverable Cheetah+ parity error.");
1737 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1739 (type & 0x1) ? 'I' : 'D',
1741 printk(KERN_WARNING "TPC<%pS>\n", (void *) regs->tpc);
1744 struct sun4v_error_entry {
1749 #define SUN4V_ERR_TYPE_UNDEFINED 0
1750 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1751 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1752 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1753 #define SUN4V_ERR_TYPE_WARNING_RES 4
1756 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1757 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1758 #define SUN4V_ERR_ATTRS_PIO 0x00000004
1759 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1760 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1761 #define SUN4V_ERR_ATTRS_USER_MODE 0x01000000
1762 #define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000
1763 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1771 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1772 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1774 static const char *sun4v_err_type_to_str(u32 type)
1777 case SUN4V_ERR_TYPE_UNDEFINED:
1779 case SUN4V_ERR_TYPE_UNCORRECTED_RES:
1780 return "uncorrected resumable";
1781 case SUN4V_ERR_TYPE_PRECISE_NONRES:
1782 return "precise nonresumable";
1783 case SUN4V_ERR_TYPE_DEFERRED_NONRES:
1784 return "deferred nonresumable";
1785 case SUN4V_ERR_TYPE_WARNING_RES:
1786 return "warning resumable";
1792 static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
1796 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1797 printk("%s: err_handle[%lx] err_stick[%lx] err_type[%08x:%s]\n",
1799 ent->err_handle, ent->err_stick,
1801 sun4v_err_type_to_str(ent->err_type));
1802 printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n",
1805 ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ?
1807 ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ?
1809 ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ?
1811 ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ?
1812 "integer-regs" : ""),
1813 ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ?
1815 ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ?
1817 ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ?
1819 ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ?
1820 "queue-full" : ""));
1821 printk("%s: err_raddr[%016lx] err_size[%u] err_cpu[%u]\n",
1823 ent->err_raddr, ent->err_size, ent->err_cpu);
1827 if ((cnt = atomic_read(ocnt)) != 0) {
1828 atomic_set(ocnt, 0);
1830 printk("%s: Queue overflowed %d times.\n",
1835 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
1836 * Log the event and clear the first word of the entry.
1838 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
1840 struct sun4v_error_entry *ent, local_copy;
1841 struct trap_per_cpu *tb;
1842 unsigned long paddr;
1847 tb = &trap_block[cpu];
1848 paddr = tb->resum_kernel_buf_pa + offset;
1851 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1853 /* We have a local copy now, so release the entry. */
1854 ent->err_handle = 0;
1859 if (ent->err_type == SUN4V_ERR_TYPE_WARNING_RES) {
1860 /* If err_type is 0x4, it's a powerdown request. Do
1861 * not do the usual resumable error log because that
1862 * makes it look like some abnormal error.
1864 printk(KERN_INFO "Power down request...\n");
1865 kill_cad_pid(SIGINT, 1);
1869 sun4v_log_error(regs, &local_copy, cpu,
1870 KERN_ERR "RESUMABLE ERROR",
1871 &sun4v_resum_oflow_cnt);
1874 /* If we try to printk() we'll probably make matters worse, by trying
1875 * to retake locks this cpu already holds or causing more errors. So
1876 * just bump a counter, and we'll report these counter bumps above.
1878 void sun4v_resum_overflow(struct pt_regs *regs)
1880 atomic_inc(&sun4v_resum_oflow_cnt);
1883 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
1884 * Log the event, clear the first word of the entry, and die.
1886 void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
1888 struct sun4v_error_entry *ent, local_copy;
1889 struct trap_per_cpu *tb;
1890 unsigned long paddr;
1895 tb = &trap_block[cpu];
1896 paddr = tb->nonresum_kernel_buf_pa + offset;
1899 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1901 /* We have a local copy now, so release the entry. */
1902 ent->err_handle = 0;
1908 /* Check for the special PCI poke sequence. */
1909 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
1910 pci_poke_faulted = 1;
1912 regs->tnpc = regs->tpc + 4;
1917 sun4v_log_error(regs, &local_copy, cpu,
1918 KERN_EMERG "NON-RESUMABLE ERROR",
1919 &sun4v_nonresum_oflow_cnt);
1921 panic("Non-resumable error.");
1924 /* If we try to printk() we'll probably make matters worse, by trying
1925 * to retake locks this cpu already holds or causing more errors. So
1926 * just bump a counter, and we'll report these counter bumps above.
1928 void sun4v_nonresum_overflow(struct pt_regs *regs)
1930 /* XXX Actually even this can make not that much sense. Perhaps
1931 * XXX we should just pull the plug and panic directly from here?
1933 atomic_inc(&sun4v_nonresum_oflow_cnt);
1936 unsigned long sun4v_err_itlb_vaddr;
1937 unsigned long sun4v_err_itlb_ctx;
1938 unsigned long sun4v_err_itlb_pte;
1939 unsigned long sun4v_err_itlb_error;
1941 void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
1944 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1946 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
1948 printk(KERN_EMERG "SUN4V-ITLB: TPC<%pS>\n", (void *) regs->tpc);
1949 printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
1950 printk(KERN_EMERG "SUN4V-ITLB: O7<%pS>\n",
1951 (void *) regs->u_regs[UREG_I7]);
1952 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
1953 "pte[%lx] error[%lx]\n",
1954 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
1955 sun4v_err_itlb_pte, sun4v_err_itlb_error);
1960 unsigned long sun4v_err_dtlb_vaddr;
1961 unsigned long sun4v_err_dtlb_ctx;
1962 unsigned long sun4v_err_dtlb_pte;
1963 unsigned long sun4v_err_dtlb_error;
1965 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
1968 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1970 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
1972 printk(KERN_EMERG "SUN4V-DTLB: TPC<%pS>\n", (void *) regs->tpc);
1973 printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
1974 printk(KERN_EMERG "SUN4V-DTLB: O7<%pS>\n",
1975 (void *) regs->u_regs[UREG_I7]);
1976 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
1977 "pte[%lx] error[%lx]\n",
1978 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
1979 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
1984 void hypervisor_tlbop_error(unsigned long err, unsigned long op)
1986 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
1990 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
1992 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
1996 void do_fpe_common(struct pt_regs *regs)
1998 if (regs->tstate & TSTATE_PRIV) {
1999 regs->tpc = regs->tnpc;
2002 unsigned long fsr = current_thread_info()->xfsr[0];
2005 if (test_thread_flag(TIF_32BIT)) {
2006 regs->tpc &= 0xffffffff;
2007 regs->tnpc &= 0xffffffff;
2009 info.si_signo = SIGFPE;
2011 info.si_addr = (void __user *)regs->tpc;
2013 info.si_code = __SI_FAULT;
2014 if ((fsr & 0x1c000) == (1 << 14)) {
2016 info.si_code = FPE_FLTINV;
2017 else if (fsr & 0x08)
2018 info.si_code = FPE_FLTOVF;
2019 else if (fsr & 0x04)
2020 info.si_code = FPE_FLTUND;
2021 else if (fsr & 0x02)
2022 info.si_code = FPE_FLTDIV;
2023 else if (fsr & 0x01)
2024 info.si_code = FPE_FLTRES;
2026 force_sig_info(SIGFPE, &info, current);
2030 void do_fpieee(struct pt_regs *regs)
2032 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2033 0, 0x24, SIGFPE) == NOTIFY_STOP)
2036 do_fpe_common(regs);
2039 extern int do_mathemu(struct pt_regs *, struct fpustate *);
2041 void do_fpother(struct pt_regs *regs)
2043 struct fpustate *f = FPUSTATE;
2046 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2047 0, 0x25, SIGFPE) == NOTIFY_STOP)
2050 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2051 case (2 << 14): /* unfinished_FPop */
2052 case (3 << 14): /* unimplemented_FPop */
2053 ret = do_mathemu(regs, f);
2058 do_fpe_common(regs);
2061 void do_tof(struct pt_regs *regs)
2065 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2066 0, 0x26, SIGEMT) == NOTIFY_STOP)
2069 if (regs->tstate & TSTATE_PRIV)
2070 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2071 if (test_thread_flag(TIF_32BIT)) {
2072 regs->tpc &= 0xffffffff;
2073 regs->tnpc &= 0xffffffff;
2075 info.si_signo = SIGEMT;
2077 info.si_code = EMT_TAGOVF;
2078 info.si_addr = (void __user *)regs->tpc;
2080 force_sig_info(SIGEMT, &info, current);
2083 void do_div0(struct pt_regs *regs)
2087 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2088 0, 0x28, SIGFPE) == NOTIFY_STOP)
2091 if (regs->tstate & TSTATE_PRIV)
2092 die_if_kernel("TL0: Kernel divide by zero.", regs);
2093 if (test_thread_flag(TIF_32BIT)) {
2094 regs->tpc &= 0xffffffff;
2095 regs->tnpc &= 0xffffffff;
2097 info.si_signo = SIGFPE;
2099 info.si_code = FPE_INTDIV;
2100 info.si_addr = (void __user *)regs->tpc;
2102 force_sig_info(SIGFPE, &info, current);
2105 static void instruction_dump(unsigned int *pc)
2109 if ((((unsigned long) pc) & 3))
2112 printk("Instruction DUMP:");
2113 for (i = -3; i < 6; i++)
2114 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2118 static void user_instruction_dump(unsigned int __user *pc)
2121 unsigned int buf[9];
2123 if ((((unsigned long) pc) & 3))
2126 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2129 printk("Instruction DUMP:");
2130 for (i = 0; i < 9; i++)
2131 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2135 void show_stack(struct task_struct *tsk, unsigned long *_ksp)
2137 unsigned long fp, thread_base, ksp;
2138 struct thread_info *tp;
2141 ksp = (unsigned long) _ksp;
2144 tp = task_thread_info(tsk);
2147 asm("mov %%fp, %0" : "=r" (ksp));
2151 if (tp == current_thread_info())
2154 fp = ksp + STACK_BIAS;
2155 thread_base = (unsigned long) tp;
2157 printk("Call Trace:\n");
2159 struct sparc_stackf *sf;
2160 struct pt_regs *regs;
2163 if (!kstack_valid(tp, fp))
2165 sf = (struct sparc_stackf *) fp;
2166 regs = (struct pt_regs *) (sf + 1);
2168 if (kstack_is_trap_frame(tp, regs)) {
2169 if (!(regs->tstate & TSTATE_PRIV))
2172 fp = regs->u_regs[UREG_I6] + STACK_BIAS;
2174 pc = sf->callers_pc;
2175 fp = (unsigned long)sf->fp + STACK_BIAS;
2178 printk(" [%016lx] %pS\n", pc, (void *) pc);
2179 } while (++count < 16);
2182 void dump_stack(void)
2184 show_stack(current, NULL);
2187 EXPORT_SYMBOL(dump_stack);
2189 static inline int is_kernel_stack(struct task_struct *task,
2190 struct reg_window *rw)
2192 unsigned long rw_addr = (unsigned long) rw;
2193 unsigned long thread_base, thread_end;
2195 if (rw_addr < PAGE_OFFSET) {
2196 if (task != &init_task)
2200 thread_base = (unsigned long) task_stack_page(task);
2201 thread_end = thread_base + sizeof(union thread_union);
2202 if (rw_addr >= thread_base &&
2203 rw_addr < thread_end &&
2210 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2212 unsigned long fp = rw->ins[6];
2217 return (struct reg_window *) (fp + STACK_BIAS);
2220 void die_if_kernel(char *str, struct pt_regs *regs)
2222 static int die_counter;
2225 /* Amuse the user. */
2228 " \"@'/ .. \\`@\"\n"
2232 printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
2233 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2234 __asm__ __volatile__("flushw");
2236 add_taint(TAINT_DIE);
2237 if (regs->tstate & TSTATE_PRIV) {
2238 struct reg_window *rw = (struct reg_window *)
2239 (regs->u_regs[UREG_FP] + STACK_BIAS);
2241 /* Stop the back trace when we hit userland or we
2242 * find some badly aligned kernel stack.
2246 is_kernel_stack(current, rw)) {
2247 printk("Caller[%016lx]: %pS\n", rw->ins[7],
2248 (void *) rw->ins[7]);
2250 rw = kernel_stack_up(rw);
2252 instruction_dump ((unsigned int *) regs->tpc);
2254 if (test_thread_flag(TIF_32BIT)) {
2255 regs->tpc &= 0xffffffff;
2256 regs->tnpc &= 0xffffffff;
2258 user_instruction_dump ((unsigned int __user *) regs->tpc);
2260 if (regs->tstate & TSTATE_PRIV)
2265 #define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2266 #define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2268 extern int handle_popc(u32 insn, struct pt_regs *regs);
2269 extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
2271 void do_illegal_instruction(struct pt_regs *regs)
2273 unsigned long pc = regs->tpc;
2274 unsigned long tstate = regs->tstate;
2278 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2279 0, 0x10, SIGILL) == NOTIFY_STOP)
2282 if (tstate & TSTATE_PRIV)
2283 die_if_kernel("Kernel illegal instruction", regs);
2284 if (test_thread_flag(TIF_32BIT))
2286 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2287 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2288 if (handle_popc(insn, regs))
2290 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2291 if (handle_ldf_stq(insn, regs))
2293 } else if (tlb_type == hypervisor) {
2294 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2295 if (!vis_emul(regs, insn))
2298 struct fpustate *f = FPUSTATE;
2300 /* XXX maybe verify XFSR bits like
2301 * XXX do_fpother() does?
2303 if (do_mathemu(regs, f))
2308 info.si_signo = SIGILL;
2310 info.si_code = ILL_ILLOPC;
2311 info.si_addr = (void __user *)pc;
2313 force_sig_info(SIGILL, &info, current);
2316 extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
2318 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2322 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2323 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2326 if (regs->tstate & TSTATE_PRIV) {
2327 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2330 info.si_signo = SIGBUS;
2332 info.si_code = BUS_ADRALN;
2333 info.si_addr = (void __user *)sfar;
2335 force_sig_info(SIGBUS, &info, current);
2338 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2342 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2343 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2346 if (regs->tstate & TSTATE_PRIV) {
2347 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2350 info.si_signo = SIGBUS;
2352 info.si_code = BUS_ADRALN;
2353 info.si_addr = (void __user *) addr;
2355 force_sig_info(SIGBUS, &info, current);
2358 void do_privop(struct pt_regs *regs)
2362 if (notify_die(DIE_TRAP, "privileged operation", regs,
2363 0, 0x11, SIGILL) == NOTIFY_STOP)
2366 if (test_thread_flag(TIF_32BIT)) {
2367 regs->tpc &= 0xffffffff;
2368 regs->tnpc &= 0xffffffff;
2370 info.si_signo = SIGILL;
2372 info.si_code = ILL_PRVOPC;
2373 info.si_addr = (void __user *)regs->tpc;
2375 force_sig_info(SIGILL, &info, current);
2378 void do_privact(struct pt_regs *regs)
2383 /* Trap level 1 stuff or other traps we should never see... */
2384 void do_cee(struct pt_regs *regs)
2386 die_if_kernel("TL0: Cache Error Exception", regs);
2389 void do_cee_tl1(struct pt_regs *regs)
2391 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2392 die_if_kernel("TL1: Cache Error Exception", regs);
2395 void do_dae_tl1(struct pt_regs *regs)
2397 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2398 die_if_kernel("TL1: Data Access Exception", regs);
2401 void do_iae_tl1(struct pt_regs *regs)
2403 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2404 die_if_kernel("TL1: Instruction Access Exception", regs);
2407 void do_div0_tl1(struct pt_regs *regs)
2409 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2410 die_if_kernel("TL1: DIV0 Exception", regs);
2413 void do_fpdis_tl1(struct pt_regs *regs)
2415 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2416 die_if_kernel("TL1: FPU Disabled", regs);
2419 void do_fpieee_tl1(struct pt_regs *regs)
2421 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2422 die_if_kernel("TL1: FPU IEEE Exception", regs);
2425 void do_fpother_tl1(struct pt_regs *regs)
2427 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2428 die_if_kernel("TL1: FPU Other Exception", regs);
2431 void do_ill_tl1(struct pt_regs *regs)
2433 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2434 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2437 void do_irq_tl1(struct pt_regs *regs)
2439 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2440 die_if_kernel("TL1: IRQ Exception", regs);
2443 void do_lddfmna_tl1(struct pt_regs *regs)
2445 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2446 die_if_kernel("TL1: LDDF Exception", regs);
2449 void do_stdfmna_tl1(struct pt_regs *regs)
2451 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2452 die_if_kernel("TL1: STDF Exception", regs);
2455 void do_paw(struct pt_regs *regs)
2457 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2460 void do_paw_tl1(struct pt_regs *regs)
2462 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2463 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2466 void do_vaw(struct pt_regs *regs)
2468 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2471 void do_vaw_tl1(struct pt_regs *regs)
2473 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2474 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2477 void do_tof_tl1(struct pt_regs *regs)
2479 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2480 die_if_kernel("TL1: Tag Overflow Exception", regs);
2483 void do_getpsr(struct pt_regs *regs)
2485 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2486 regs->tpc = regs->tnpc;
2488 if (test_thread_flag(TIF_32BIT)) {
2489 regs->tpc &= 0xffffffff;
2490 regs->tnpc &= 0xffffffff;
2494 struct trap_per_cpu trap_block[NR_CPUS];
2496 /* This can get invoked before sched_init() so play it super safe
2497 * and use hard_smp_processor_id().
2499 void notrace init_cur_cpu_trap(struct thread_info *t)
2501 int cpu = hard_smp_processor_id();
2502 struct trap_per_cpu *p = &trap_block[cpu];
2508 extern void thread_info_offsets_are_bolixed_dave(void);
2509 extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2510 extern void tsb_config_offsets_are_bolixed_dave(void);
2512 /* Only invoked on boot processor. */
2513 void __init trap_init(void)
2515 /* Compile time sanity check. */
2516 if (TI_TASK != offsetof(struct thread_info, task) ||
2517 TI_FLAGS != offsetof(struct thread_info, flags) ||
2518 TI_CPU != offsetof(struct thread_info, cpu) ||
2519 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2520 TI_KSP != offsetof(struct thread_info, ksp) ||
2521 TI_FAULT_ADDR != offsetof(struct thread_info, fault_address) ||
2522 TI_KREGS != offsetof(struct thread_info, kregs) ||
2523 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2524 TI_EXEC_DOMAIN != offsetof(struct thread_info, exec_domain) ||
2525 TI_REG_WINDOW != offsetof(struct thread_info, reg_window) ||
2526 TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) ||
2527 TI_GSR != offsetof(struct thread_info, gsr) ||
2528 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2529 TI_USER_CNTD0 != offsetof(struct thread_info, user_cntd0) ||
2530 TI_USER_CNTD1 != offsetof(struct thread_info, user_cntd1) ||
2531 TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) ||
2532 TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) ||
2533 TI_PCR != offsetof(struct thread_info, pcr_reg) ||
2534 TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) ||
2535 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2536 TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) ||
2537 TI_RESTART_BLOCK != offsetof(struct thread_info, restart_block) ||
2538 TI_KUNA_REGS != offsetof(struct thread_info, kern_una_regs) ||
2539 TI_KUNA_INSN != offsetof(struct thread_info, kern_una_insn) ||
2540 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2541 (TI_FPREGS & (64 - 1)))
2542 thread_info_offsets_are_bolixed_dave();
2544 if (TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, thread) ||
2545 (TRAP_PER_CPU_PGD_PADDR !=
2546 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2547 (TRAP_PER_CPU_CPU_MONDO_PA !=
2548 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2549 (TRAP_PER_CPU_DEV_MONDO_PA !=
2550 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2551 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2552 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2553 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2554 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2555 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2556 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2557 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2558 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2559 (TRAP_PER_CPU_FAULT_INFO !=
2560 offsetof(struct trap_per_cpu, fault_info)) ||
2561 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2562 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2563 (TRAP_PER_CPU_CPU_LIST_PA !=
2564 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2565 (TRAP_PER_CPU_TSB_HUGE !=
2566 offsetof(struct trap_per_cpu, tsb_huge)) ||
2567 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2568 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2569 (TRAP_PER_CPU_IRQ_WORKLIST_PA !=
2570 offsetof(struct trap_per_cpu, irq_worklist_pa)) ||
2571 (TRAP_PER_CPU_CPU_MONDO_QMASK !=
2572 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) ||
2573 (TRAP_PER_CPU_DEV_MONDO_QMASK !=
2574 offsetof(struct trap_per_cpu, dev_mondo_qmask)) ||
2575 (TRAP_PER_CPU_RESUM_QMASK !=
2576 offsetof(struct trap_per_cpu, resum_qmask)) ||
2577 (TRAP_PER_CPU_NONRESUM_QMASK !=
2578 offsetof(struct trap_per_cpu, nonresum_qmask)))
2579 trap_per_cpu_offsets_are_bolixed_dave();
2581 if ((TSB_CONFIG_TSB !=
2582 offsetof(struct tsb_config, tsb)) ||
2583 (TSB_CONFIG_RSS_LIMIT !=
2584 offsetof(struct tsb_config, tsb_rss_limit)) ||
2585 (TSB_CONFIG_NENTRIES !=
2586 offsetof(struct tsb_config, tsb_nentries)) ||
2587 (TSB_CONFIG_REG_VAL !=
2588 offsetof(struct tsb_config, tsb_reg_val)) ||
2589 (TSB_CONFIG_MAP_VADDR !=
2590 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2591 (TSB_CONFIG_MAP_PTE !=
2592 offsetof(struct tsb_config, tsb_map_pte)))
2593 tsb_config_offsets_are_bolixed_dave();
2595 /* Attach to the address space of init_task. On SMP we
2596 * do this in smp.c:smp_callin for other cpus.
2598 atomic_inc(&init_mm.mm_count);
2599 current->active_mm = &init_mm;