1 /* $Id: traps.c,v 1.85 2002/02/09 19:49:31 davem Exp $
2 * arch/sparc64/kernel/traps.c
4 * Copyright (C) 1995,1997 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com)
9 * I like traps on v9, :))))
12 #include <linux/config.h>
13 #include <linux/module.h>
14 #include <linux/sched.h> /* for jiffies */
15 #include <linux/kernel.h>
16 #include <linux/kallsyms.h>
17 #include <linux/signal.h>
18 #include <linux/smp.h>
19 #include <linux/smp_lock.h>
21 #include <linux/init.h>
23 #include <asm/delay.h>
24 #include <asm/system.h>
25 #include <asm/ptrace.h>
26 #include <asm/oplib.h>
28 #include <asm/pgtable.h>
29 #include <asm/unistd.h>
30 #include <asm/uaccess.h>
31 #include <asm/fpumacro.h>
34 #include <asm/estate.h>
35 #include <asm/chafsr.h>
36 #include <asm/sfafsr.h>
37 #include <asm/psrcompat.h>
38 #include <asm/processor.h>
39 #include <asm/timer.h>
40 #include <asm/kdebug.h>
43 #include <linux/kmod.h>
46 ATOMIC_NOTIFIER_HEAD(sparc64die_chain);
48 int register_die_notifier(struct notifier_block *nb)
50 return atomic_notifier_chain_register(&sparc64die_chain, nb);
52 EXPORT_SYMBOL(register_die_notifier);
54 int unregister_die_notifier(struct notifier_block *nb)
56 return atomic_notifier_chain_unregister(&sparc64die_chain, nb);
58 EXPORT_SYMBOL(unregister_die_notifier);
60 /* When an irrecoverable trap occurs at tl > 0, the trap entry
61 * code logs the trap state registers at every level in the trap
62 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
75 static void dump_tl1_traplog(struct tl1_traplog *p)
79 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
80 "dumping track stack.\n", p->tl);
82 limit = (tlb_type == hypervisor) ? 2 : 4;
83 for (i = 0; i < limit; i++) {
85 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
86 "TNPC[%016lx] TT[%lx]\n",
88 p->trapstack[i].tstate, p->trapstack[i].tpc,
89 p->trapstack[i].tnpc, p->trapstack[i].tt);
93 void do_call_debug(struct pt_regs *regs)
95 notify_die(DIE_CALL, "debug call", regs, 0, 255, SIGINT);
98 void bad_trap(struct pt_regs *regs, long lvl)
103 if (notify_die(DIE_TRAP, "bad trap", regs,
104 0, lvl, SIGTRAP) == NOTIFY_STOP)
108 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
109 die_if_kernel(buffer, regs);
113 if (regs->tstate & TSTATE_PRIV) {
114 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
115 die_if_kernel(buffer, regs);
117 if (test_thread_flag(TIF_32BIT)) {
118 regs->tpc &= 0xffffffff;
119 regs->tnpc &= 0xffffffff;
121 info.si_signo = SIGILL;
123 info.si_code = ILL_ILLTRP;
124 info.si_addr = (void __user *)regs->tpc;
125 info.si_trapno = lvl;
126 force_sig_info(SIGILL, &info, current);
129 void bad_trap_tl1(struct pt_regs *regs, long lvl)
133 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
134 0, lvl, SIGTRAP) == NOTIFY_STOP)
137 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
139 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
140 die_if_kernel (buffer, regs);
143 #ifdef CONFIG_DEBUG_BUGVERBOSE
144 void do_BUG(const char *file, int line)
147 printk("kernel BUG at %s:%d!\n", file, line);
151 void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
155 if (notify_die(DIE_TRAP, "instruction access exception", regs,
156 0, 0x8, SIGTRAP) == NOTIFY_STOP)
159 if (regs->tstate & TSTATE_PRIV) {
160 printk("spitfire_insn_access_exception: SFSR[%016lx] "
161 "SFAR[%016lx], going.\n", sfsr, sfar);
162 die_if_kernel("Iax", regs);
164 if (test_thread_flag(TIF_32BIT)) {
165 regs->tpc &= 0xffffffff;
166 regs->tnpc &= 0xffffffff;
168 info.si_signo = SIGSEGV;
170 info.si_code = SEGV_MAPERR;
171 info.si_addr = (void __user *)regs->tpc;
173 force_sig_info(SIGSEGV, &info, current);
176 void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
178 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
179 0, 0x8, SIGTRAP) == NOTIFY_STOP)
182 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
183 spitfire_insn_access_exception(regs, sfsr, sfar);
186 void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
188 unsigned short type = (type_ctx >> 16);
189 unsigned short ctx = (type_ctx & 0xffff);
192 if (notify_die(DIE_TRAP, "instruction access exception", regs,
193 0, 0x8, SIGTRAP) == NOTIFY_STOP)
196 if (regs->tstate & TSTATE_PRIV) {
197 printk("sun4v_insn_access_exception: ADDR[%016lx] "
198 "CTX[%04x] TYPE[%04x], going.\n",
200 die_if_kernel("Iax", regs);
203 if (test_thread_flag(TIF_32BIT)) {
204 regs->tpc &= 0xffffffff;
205 regs->tnpc &= 0xffffffff;
207 info.si_signo = SIGSEGV;
209 info.si_code = SEGV_MAPERR;
210 info.si_addr = (void __user *) addr;
212 force_sig_info(SIGSEGV, &info, current);
215 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
217 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
218 0, 0x8, SIGTRAP) == NOTIFY_STOP)
221 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
222 sun4v_insn_access_exception(regs, addr, type_ctx);
225 void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
229 if (notify_die(DIE_TRAP, "data access exception", regs,
230 0, 0x30, SIGTRAP) == NOTIFY_STOP)
233 if (regs->tstate & TSTATE_PRIV) {
234 /* Test if this comes from uaccess places. */
235 const struct exception_table_entry *entry;
237 entry = search_exception_tables(regs->tpc);
239 /* Ouch, somebody is trying VM hole tricks on us... */
240 #ifdef DEBUG_EXCEPTIONS
241 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
242 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
243 regs->tpc, entry->fixup);
245 regs->tpc = entry->fixup;
246 regs->tnpc = regs->tpc + 4;
250 printk("spitfire_data_access_exception: SFSR[%016lx] "
251 "SFAR[%016lx], going.\n", sfsr, sfar);
252 die_if_kernel("Dax", regs);
255 info.si_signo = SIGSEGV;
257 info.si_code = SEGV_MAPERR;
258 info.si_addr = (void __user *)sfar;
260 force_sig_info(SIGSEGV, &info, current);
263 void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
265 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
266 0, 0x30, SIGTRAP) == NOTIFY_STOP)
269 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
270 spitfire_data_access_exception(regs, sfsr, sfar);
273 void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
275 unsigned short type = (type_ctx >> 16);
276 unsigned short ctx = (type_ctx & 0xffff);
279 if (notify_die(DIE_TRAP, "data access exception", regs,
280 0, 0x8, SIGTRAP) == NOTIFY_STOP)
283 if (regs->tstate & TSTATE_PRIV) {
284 printk("sun4v_data_access_exception: ADDR[%016lx] "
285 "CTX[%04x] TYPE[%04x], going.\n",
287 die_if_kernel("Dax", regs);
290 if (test_thread_flag(TIF_32BIT)) {
291 regs->tpc &= 0xffffffff;
292 regs->tnpc &= 0xffffffff;
294 info.si_signo = SIGSEGV;
296 info.si_code = SEGV_MAPERR;
297 info.si_addr = (void __user *) addr;
299 force_sig_info(SIGSEGV, &info, current);
302 void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
304 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
305 0, 0x8, SIGTRAP) == NOTIFY_STOP)
308 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
309 sun4v_data_access_exception(regs, addr, type_ctx);
313 /* This is really pathetic... */
314 extern volatile int pci_poke_in_progress;
315 extern volatile int pci_poke_cpu;
316 extern volatile int pci_poke_faulted;
319 /* When access exceptions happen, we must do this. */
320 static void spitfire_clean_and_reenable_l1_caches(void)
324 if (tlb_type != spitfire)
328 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
329 spitfire_put_icache_tag(va, 0x0);
330 spitfire_put_dcache_tag(va, 0x0);
333 /* Re-enable in LSU. */
334 __asm__ __volatile__("flush %%g6\n\t"
336 "stxa %0, [%%g0] %1\n\t"
339 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
340 LSU_CONTROL_IM | LSU_CONTROL_DM),
341 "i" (ASI_LSU_CONTROL)
345 static void spitfire_enable_estate_errors(void)
347 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
350 : "r" (ESTATE_ERR_ALL),
351 "i" (ASI_ESTATE_ERROR_EN));
354 static char ecc_syndrome_table[] = {
355 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
356 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
357 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
358 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
359 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
360 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
361 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
362 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
363 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
364 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
365 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
366 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
367 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
368 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
369 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
370 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
371 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
372 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
373 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
374 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
375 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
376 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
377 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
378 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
379 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
380 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
381 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
382 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
383 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
384 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
385 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
386 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
389 static char *syndrome_unknown = "<Unknown>";
391 static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
393 unsigned short scode;
394 char memmod_str[64], *p;
397 scode = ecc_syndrome_table[udbl & 0xff];
398 if (prom_getunumber(scode, afar,
399 memmod_str, sizeof(memmod_str)) == -1)
400 p = syndrome_unknown;
403 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
404 "Memory Module \"%s\"\n",
405 smp_processor_id(), scode, p);
409 scode = ecc_syndrome_table[udbh & 0xff];
410 if (prom_getunumber(scode, afar,
411 memmod_str, sizeof(memmod_str)) == -1)
412 p = syndrome_unknown;
415 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
416 "Memory Module \"%s\"\n",
417 smp_processor_id(), scode, p);
422 static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
425 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
426 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
427 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
429 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
431 /* We always log it, even if someone is listening for this
434 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
435 0, TRAP_TYPE_CEE, SIGTRAP);
437 /* The Correctable ECC Error trap does not disable I/D caches. So
438 * we only have to restore the ESTATE Error Enable register.
440 spitfire_enable_estate_errors();
443 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)
447 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
448 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
449 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
451 /* XXX add more human friendly logging of the error status
452 * XXX as is implemented for cheetah
455 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
457 /* We always log it, even if someone is listening for this
460 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
463 if (regs->tstate & TSTATE_PRIV) {
465 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
466 die_if_kernel("UE", regs);
469 /* XXX need more intelligent processing here, such as is implemented
470 * XXX for cheetah errors, in fact if the E-cache still holds the
471 * XXX line with bad parity this will loop
474 spitfire_clean_and_reenable_l1_caches();
475 spitfire_enable_estate_errors();
477 if (test_thread_flag(TIF_32BIT)) {
478 regs->tpc &= 0xffffffff;
479 regs->tnpc &= 0xffffffff;
481 info.si_signo = SIGBUS;
483 info.si_code = BUS_OBJERR;
484 info.si_addr = (void *)0;
486 force_sig_info(SIGBUS, &info, current);
489 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
491 unsigned long afsr, tt, udbh, udbl;
494 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
495 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
496 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
497 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
498 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
501 if (tt == TRAP_TYPE_DAE &&
502 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
503 spitfire_clean_and_reenable_l1_caches();
504 spitfire_enable_estate_errors();
506 pci_poke_faulted = 1;
507 regs->tnpc = regs->tpc + 4;
512 if (afsr & SFAFSR_UE)
513 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
515 if (tt == TRAP_TYPE_CEE) {
516 /* Handle the case where we took a CEE trap, but ACK'd
517 * only the UE state in the UDB error registers.
519 if (afsr & SFAFSR_UE) {
520 if (udbh & UDBE_CE) {
521 __asm__ __volatile__(
522 "stxa %0, [%1] %2\n\t"
525 : "r" (udbh & UDBE_CE),
526 "r" (0x0), "i" (ASI_UDB_ERROR_W));
528 if (udbl & UDBE_CE) {
529 __asm__ __volatile__(
530 "stxa %0, [%1] %2\n\t"
533 : "r" (udbl & UDBE_CE),
534 "r" (0x18), "i" (ASI_UDB_ERROR_W));
538 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
542 int cheetah_pcache_forced_on;
544 void cheetah_enable_pcache(void)
548 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
551 __asm__ __volatile__("ldxa [%%g0] %1, %0"
553 : "i" (ASI_DCU_CONTROL_REG));
554 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
555 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
558 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
561 /* Cheetah error trap handling. */
562 static unsigned long ecache_flush_physbase;
563 static unsigned long ecache_flush_linesize;
564 static unsigned long ecache_flush_size;
566 /* WARNING: The error trap handlers in assembly know the precise
567 * layout of the following structure.
569 * C-level handlers below use this information to log the error
570 * and then determine how to recover (if possible).
572 struct cheetah_err_info {
577 /*0x10*/u64 dcache_data[4]; /* The actual data */
578 /*0x30*/u64 dcache_index; /* D-cache index */
579 /*0x38*/u64 dcache_tag; /* D-cache tag/valid */
580 /*0x40*/u64 dcache_utag; /* D-cache microtag */
581 /*0x48*/u64 dcache_stag; /* D-cache snooptag */
584 /*0x50*/u64 icache_data[8]; /* The actual insns + predecode */
585 /*0x90*/u64 icache_index; /* I-cache index */
586 /*0x98*/u64 icache_tag; /* I-cache phys tag */
587 /*0xa0*/u64 icache_utag; /* I-cache microtag */
588 /*0xa8*/u64 icache_stag; /* I-cache snooptag */
589 /*0xb0*/u64 icache_upper; /* I-cache upper-tag */
590 /*0xb8*/u64 icache_lower; /* I-cache lower-tag */
593 /*0xc0*/u64 ecache_data[4]; /* 32 bytes from staging registers */
594 /*0xe0*/u64 ecache_index; /* E-cache index */
595 /*0xe8*/u64 ecache_tag; /* E-cache tag/state */
597 /*0xf0*/u64 __pad[32 - 30];
599 #define CHAFSR_INVALID ((u64)-1L)
601 /* This table is ordered in priority of errors and matches the
602 * AFAR overwrite policy as well.
605 struct afsr_error_table {
610 static const char CHAFSR_PERR_msg[] =
611 "System interface protocol error";
612 static const char CHAFSR_IERR_msg[] =
613 "Internal processor error";
614 static const char CHAFSR_ISAP_msg[] =
615 "System request parity error on incoming addresss";
616 static const char CHAFSR_UCU_msg[] =
617 "Uncorrectable E-cache ECC error for ifetch/data";
618 static const char CHAFSR_UCC_msg[] =
619 "SW Correctable E-cache ECC error for ifetch/data";
620 static const char CHAFSR_UE_msg[] =
621 "Uncorrectable system bus data ECC error for read";
622 static const char CHAFSR_EDU_msg[] =
623 "Uncorrectable E-cache ECC error for stmerge/blkld";
624 static const char CHAFSR_EMU_msg[] =
625 "Uncorrectable system bus MTAG error";
626 static const char CHAFSR_WDU_msg[] =
627 "Uncorrectable E-cache ECC error for writeback";
628 static const char CHAFSR_CPU_msg[] =
629 "Uncorrectable ECC error for copyout";
630 static const char CHAFSR_CE_msg[] =
631 "HW corrected system bus data ECC error for read";
632 static const char CHAFSR_EDC_msg[] =
633 "HW corrected E-cache ECC error for stmerge/blkld";
634 static const char CHAFSR_EMC_msg[] =
635 "HW corrected system bus MTAG ECC error";
636 static const char CHAFSR_WDC_msg[] =
637 "HW corrected E-cache ECC error for writeback";
638 static const char CHAFSR_CPC_msg[] =
639 "HW corrected ECC error for copyout";
640 static const char CHAFSR_TO_msg[] =
641 "Unmapped error from system bus";
642 static const char CHAFSR_BERR_msg[] =
643 "Bus error response from system bus";
644 static const char CHAFSR_IVC_msg[] =
645 "HW corrected system bus data ECC error for ivec read";
646 static const char CHAFSR_IVU_msg[] =
647 "Uncorrectable system bus data ECC error for ivec read";
648 static struct afsr_error_table __cheetah_error_table[] = {
649 { CHAFSR_PERR, CHAFSR_PERR_msg },
650 { CHAFSR_IERR, CHAFSR_IERR_msg },
651 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
652 { CHAFSR_UCU, CHAFSR_UCU_msg },
653 { CHAFSR_UCC, CHAFSR_UCC_msg },
654 { CHAFSR_UE, CHAFSR_UE_msg },
655 { CHAFSR_EDU, CHAFSR_EDU_msg },
656 { CHAFSR_EMU, CHAFSR_EMU_msg },
657 { CHAFSR_WDU, CHAFSR_WDU_msg },
658 { CHAFSR_CPU, CHAFSR_CPU_msg },
659 { CHAFSR_CE, CHAFSR_CE_msg },
660 { CHAFSR_EDC, CHAFSR_EDC_msg },
661 { CHAFSR_EMC, CHAFSR_EMC_msg },
662 { CHAFSR_WDC, CHAFSR_WDC_msg },
663 { CHAFSR_CPC, CHAFSR_CPC_msg },
664 { CHAFSR_TO, CHAFSR_TO_msg },
665 { CHAFSR_BERR, CHAFSR_BERR_msg },
666 /* These two do not update the AFAR. */
667 { CHAFSR_IVC, CHAFSR_IVC_msg },
668 { CHAFSR_IVU, CHAFSR_IVU_msg },
671 static const char CHPAFSR_DTO_msg[] =
672 "System bus unmapped error for prefetch/storequeue-read";
673 static const char CHPAFSR_DBERR_msg[] =
674 "System bus error for prefetch/storequeue-read";
675 static const char CHPAFSR_THCE_msg[] =
676 "Hardware corrected E-cache Tag ECC error";
677 static const char CHPAFSR_TSCE_msg[] =
678 "SW handled correctable E-cache Tag ECC error";
679 static const char CHPAFSR_TUE_msg[] =
680 "Uncorrectable E-cache Tag ECC error";
681 static const char CHPAFSR_DUE_msg[] =
682 "System bus uncorrectable data ECC error due to prefetch/store-fill";
683 static struct afsr_error_table __cheetah_plus_error_table[] = {
684 { CHAFSR_PERR, CHAFSR_PERR_msg },
685 { CHAFSR_IERR, CHAFSR_IERR_msg },
686 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
687 { CHAFSR_UCU, CHAFSR_UCU_msg },
688 { CHAFSR_UCC, CHAFSR_UCC_msg },
689 { CHAFSR_UE, CHAFSR_UE_msg },
690 { CHAFSR_EDU, CHAFSR_EDU_msg },
691 { CHAFSR_EMU, CHAFSR_EMU_msg },
692 { CHAFSR_WDU, CHAFSR_WDU_msg },
693 { CHAFSR_CPU, CHAFSR_CPU_msg },
694 { CHAFSR_CE, CHAFSR_CE_msg },
695 { CHAFSR_EDC, CHAFSR_EDC_msg },
696 { CHAFSR_EMC, CHAFSR_EMC_msg },
697 { CHAFSR_WDC, CHAFSR_WDC_msg },
698 { CHAFSR_CPC, CHAFSR_CPC_msg },
699 { CHAFSR_TO, CHAFSR_TO_msg },
700 { CHAFSR_BERR, CHAFSR_BERR_msg },
701 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
702 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
703 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
704 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
705 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
706 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
707 /* These two do not update the AFAR. */
708 { CHAFSR_IVC, CHAFSR_IVC_msg },
709 { CHAFSR_IVU, CHAFSR_IVU_msg },
712 static const char JPAFSR_JETO_msg[] =
713 "System interface protocol error, hw timeout caused";
714 static const char JPAFSR_SCE_msg[] =
715 "Parity error on system snoop results";
716 static const char JPAFSR_JEIC_msg[] =
717 "System interface protocol error, illegal command detected";
718 static const char JPAFSR_JEIT_msg[] =
719 "System interface protocol error, illegal ADTYPE detected";
720 static const char JPAFSR_OM_msg[] =
721 "Out of range memory error has occurred";
722 static const char JPAFSR_ETP_msg[] =
723 "Parity error on L2 cache tag SRAM";
724 static const char JPAFSR_UMS_msg[] =
725 "Error due to unsupported store";
726 static const char JPAFSR_RUE_msg[] =
727 "Uncorrectable ECC error from remote cache/memory";
728 static const char JPAFSR_RCE_msg[] =
729 "Correctable ECC error from remote cache/memory";
730 static const char JPAFSR_BP_msg[] =
731 "JBUS parity error on returned read data";
732 static const char JPAFSR_WBP_msg[] =
733 "JBUS parity error on data for writeback or block store";
734 static const char JPAFSR_FRC_msg[] =
735 "Foreign read to DRAM incurring correctable ECC error";
736 static const char JPAFSR_FRU_msg[] =
737 "Foreign read to DRAM incurring uncorrectable ECC error";
738 static struct afsr_error_table __jalapeno_error_table[] = {
739 { JPAFSR_JETO, JPAFSR_JETO_msg },
740 { JPAFSR_SCE, JPAFSR_SCE_msg },
741 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
742 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
743 { CHAFSR_PERR, CHAFSR_PERR_msg },
744 { CHAFSR_IERR, CHAFSR_IERR_msg },
745 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
746 { CHAFSR_UCU, CHAFSR_UCU_msg },
747 { CHAFSR_UCC, CHAFSR_UCC_msg },
748 { CHAFSR_UE, CHAFSR_UE_msg },
749 { CHAFSR_EDU, CHAFSR_EDU_msg },
750 { JPAFSR_OM, JPAFSR_OM_msg },
751 { CHAFSR_WDU, CHAFSR_WDU_msg },
752 { CHAFSR_CPU, CHAFSR_CPU_msg },
753 { CHAFSR_CE, CHAFSR_CE_msg },
754 { CHAFSR_EDC, CHAFSR_EDC_msg },
755 { JPAFSR_ETP, JPAFSR_ETP_msg },
756 { CHAFSR_WDC, CHAFSR_WDC_msg },
757 { CHAFSR_CPC, CHAFSR_CPC_msg },
758 { CHAFSR_TO, CHAFSR_TO_msg },
759 { CHAFSR_BERR, CHAFSR_BERR_msg },
760 { JPAFSR_UMS, JPAFSR_UMS_msg },
761 { JPAFSR_RUE, JPAFSR_RUE_msg },
762 { JPAFSR_RCE, JPAFSR_RCE_msg },
763 { JPAFSR_BP, JPAFSR_BP_msg },
764 { JPAFSR_WBP, JPAFSR_WBP_msg },
765 { JPAFSR_FRC, JPAFSR_FRC_msg },
766 { JPAFSR_FRU, JPAFSR_FRU_msg },
767 /* These two do not update the AFAR. */
768 { CHAFSR_IVU, CHAFSR_IVU_msg },
771 static struct afsr_error_table *cheetah_error_table;
772 static unsigned long cheetah_afsr_errors;
774 /* This is allocated at boot time based upon the largest hardware
775 * cpu ID in the system. We allocate two entries per cpu, one for
776 * TL==0 logging and one for TL >= 1 logging.
778 struct cheetah_err_info *cheetah_error_log;
780 static __inline__ struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
782 struct cheetah_err_info *p;
783 int cpu = smp_processor_id();
785 if (!cheetah_error_log)
788 p = cheetah_error_log + (cpu * 2);
789 if ((afsr & CHAFSR_TL1) != 0UL)
795 extern unsigned int tl0_icpe[], tl1_icpe[];
796 extern unsigned int tl0_dcpe[], tl1_dcpe[];
797 extern unsigned int tl0_fecc[], tl1_fecc[];
798 extern unsigned int tl0_cee[], tl1_cee[];
799 extern unsigned int tl0_iae[], tl1_iae[];
800 extern unsigned int tl0_dae[], tl1_dae[];
801 extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
802 extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
803 extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
804 extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
805 extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
807 void __init cheetah_ecache_flush_init(void)
809 unsigned long largest_size, smallest_linesize, order, ver;
810 int node, i, instance;
812 /* Scan all cpu device tree nodes, note two values:
813 * 1) largest E-cache size
814 * 2) smallest E-cache line size
817 smallest_linesize = ~0UL;
820 while (!cpu_find_by_instance(instance, &node, NULL)) {
823 val = prom_getintdefault(node, "ecache-size",
825 if (val > largest_size)
827 val = prom_getintdefault(node, "ecache-line-size", 64);
828 if (val < smallest_linesize)
829 smallest_linesize = val;
833 if (largest_size == 0UL || smallest_linesize == ~0UL) {
834 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
839 ecache_flush_size = (2 * largest_size);
840 ecache_flush_linesize = smallest_linesize;
842 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
844 if (ecache_flush_physbase == ~0UL) {
845 prom_printf("cheetah_ecache_flush_init: Cannot find %d byte "
846 "contiguous physical memory.\n",
851 /* Now allocate error trap reporting scoreboard. */
852 node = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
853 for (order = 0; order < MAX_ORDER; order++) {
854 if ((PAGE_SIZE << order) >= node)
857 cheetah_error_log = (struct cheetah_err_info *)
858 __get_free_pages(GFP_KERNEL, order);
859 if (!cheetah_error_log) {
860 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
861 "error logging scoreboard (%d bytes).\n", node);
864 memset(cheetah_error_log, 0, PAGE_SIZE << order);
866 /* Mark all AFSRs as invalid so that the trap handler will
867 * log new new information there.
869 for (i = 0; i < 2 * NR_CPUS; i++)
870 cheetah_error_log[i].afsr = CHAFSR_INVALID;
872 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
873 if ((ver >> 32) == __JALAPENO_ID ||
874 (ver >> 32) == __SERRANO_ID) {
875 cheetah_error_table = &__jalapeno_error_table[0];
876 cheetah_afsr_errors = JPAFSR_ERRORS;
877 } else if ((ver >> 32) == 0x003e0015) {
878 cheetah_error_table = &__cheetah_plus_error_table[0];
879 cheetah_afsr_errors = CHPAFSR_ERRORS;
881 cheetah_error_table = &__cheetah_error_table[0];
882 cheetah_afsr_errors = CHAFSR_ERRORS;
885 /* Now patch trap tables. */
886 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
887 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
888 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
889 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
890 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
891 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
892 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
893 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
894 if (tlb_type == cheetah_plus) {
895 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
896 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
897 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
898 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
903 static void cheetah_flush_ecache(void)
905 unsigned long flush_base = ecache_flush_physbase;
906 unsigned long flush_linesize = ecache_flush_linesize;
907 unsigned long flush_size = ecache_flush_size;
909 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
910 " bne,pt %%xcc, 1b\n\t"
911 " ldxa [%2 + %0] %3, %%g0\n\t"
913 : "0" (flush_size), "r" (flush_base),
914 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
917 static void cheetah_flush_ecache_line(unsigned long physaddr)
921 physaddr &= ~(8UL - 1UL);
922 physaddr = (ecache_flush_physbase +
923 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
924 alias = physaddr + (ecache_flush_size >> 1UL);
925 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
926 "ldxa [%1] %2, %%g0\n\t"
929 : "r" (physaddr), "r" (alias),
930 "i" (ASI_PHYS_USE_EC));
933 /* Unfortunately, the diagnostic access to the I-cache tags we need to
934 * use to clear the thing interferes with I-cache coherency transactions.
936 * So we must only flush the I-cache when it is disabled.
938 static void __cheetah_flush_icache(void)
940 unsigned int icache_size, icache_line_size;
943 icache_size = local_cpu_data().icache_size;
944 icache_line_size = local_cpu_data().icache_line_size;
946 /* Clear the valid bits in all the tags. */
947 for (addr = 0; addr < icache_size; addr += icache_line_size) {
948 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
951 : "r" (addr | (2 << 3)),
956 static void cheetah_flush_icache(void)
958 unsigned long dcu_save;
960 /* Save current DCU, disable I-cache. */
961 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
962 "or %0, %2, %%g1\n\t"
963 "stxa %%g1, [%%g0] %1\n\t"
966 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
969 __cheetah_flush_icache();
971 /* Restore DCU register */
972 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
975 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
978 static void cheetah_flush_dcache(void)
980 unsigned int dcache_size, dcache_line_size;
983 dcache_size = local_cpu_data().dcache_size;
984 dcache_line_size = local_cpu_data().dcache_line_size;
986 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
987 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
990 : "r" (addr), "i" (ASI_DCACHE_TAG));
994 /* In order to make the even parity correct we must do two things.
995 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
996 * Next, we clear out all 32-bytes of data for that line. Data of
997 * all-zero + tag parity value of zero == correct parity.
999 static void cheetah_plus_zap_dcache_parity(void)
1001 unsigned int dcache_size, dcache_line_size;
1004 dcache_size = local_cpu_data().dcache_size;
1005 dcache_line_size = local_cpu_data().dcache_line_size;
1007 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1008 unsigned long tag = (addr >> 14);
1011 __asm__ __volatile__("membar #Sync\n\t"
1012 "stxa %0, [%1] %2\n\t"
1015 : "r" (tag), "r" (addr),
1016 "i" (ASI_DCACHE_UTAG));
1017 for (line = addr; line < addr + dcache_line_size; line += 8)
1018 __asm__ __volatile__("membar #Sync\n\t"
1019 "stxa %%g0, [%0] %1\n\t"
1023 "i" (ASI_DCACHE_DATA));
1027 /* Conversion tables used to frob Cheetah AFSR syndrome values into
1028 * something palatable to the memory controller driver get_unumber
1052 static unsigned char cheetah_ecc_syntab[] = {
1053 /*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1054 /*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1055 /*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1056 /*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1057 /*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1058 /*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1059 /*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1060 /*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1061 /*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1062 /*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1063 /*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1064 /*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1065 /*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1066 /*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1067 /*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1068 /*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1069 /*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1070 /*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1071 /*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1072 /*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1073 /*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1074 /*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1075 /*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1076 /*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1077 /*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1078 /*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1079 /*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1080 /*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1081 /*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1082 /*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1083 /*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1084 /*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1086 static unsigned char cheetah_mtag_syntab[] = {
1097 /* Return the highest priority error conditon mentioned. */
1098 static __inline__ unsigned long cheetah_get_hipri(unsigned long afsr)
1100 unsigned long tmp = 0;
1103 for (i = 0; cheetah_error_table[i].mask; i++) {
1104 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1110 static const char *cheetah_get_string(unsigned long bit)
1114 for (i = 0; cheetah_error_table[i].mask; i++) {
1115 if ((bit & cheetah_error_table[i].mask) != 0UL)
1116 return cheetah_error_table[i].name;
1121 extern int chmc_getunumber(int, unsigned long, char *, int);
1123 static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1124 unsigned long afsr, unsigned long afar, int recoverable)
1126 unsigned long hipri;
1129 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1130 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1132 (afsr & CHAFSR_TL1) ? 1 : 0);
1133 printk("%s" "ERROR(%d): TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1134 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1135 regs->tpc, regs->tnpc, regs->tstate);
1136 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1137 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1138 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1139 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1140 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1141 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1142 hipri = cheetah_get_hipri(afsr);
1143 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1144 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1145 hipri, cheetah_get_string(hipri));
1147 /* Try to get unumber if relevant. */
1148 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1149 CHAFSR_CPC | CHAFSR_CPU | \
1150 CHAFSR_UE | CHAFSR_CE | \
1151 CHAFSR_EDC | CHAFSR_EDU | \
1152 CHAFSR_UCC | CHAFSR_UCU | \
1153 CHAFSR_WDU | CHAFSR_WDC)
1154 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1155 if (afsr & ESYND_ERRORS) {
1159 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1160 syndrome = cheetah_ecc_syntab[syndrome];
1161 ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum));
1163 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1164 (recoverable ? KERN_WARNING : KERN_CRIT),
1165 smp_processor_id(), unum);
1166 } else if (afsr & MSYND_ERRORS) {
1170 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1171 syndrome = cheetah_mtag_syntab[syndrome];
1172 ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum));
1174 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1175 (recoverable ? KERN_WARNING : KERN_CRIT),
1176 smp_processor_id(), unum);
1179 /* Now dump the cache snapshots. */
1180 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx]\n",
1181 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1182 (int) info->dcache_index,
1186 printk("%s" "ERROR(%d): D-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1187 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1188 info->dcache_data[0],
1189 info->dcache_data[1],
1190 info->dcache_data[2],
1191 info->dcache_data[3]);
1192 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx] "
1193 "u[%016lx] l[%016lx]\n",
1194 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1195 (int) info->icache_index,
1200 info->icache_lower);
1201 printk("%s" "ERROR(%d): I-cache INSN0[%016lx] INSN1[%016lx] INSN2[%016lx] INSN3[%016lx]\n",
1202 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1203 info->icache_data[0],
1204 info->icache_data[1],
1205 info->icache_data[2],
1206 info->icache_data[3]);
1207 printk("%s" "ERROR(%d): I-cache INSN4[%016lx] INSN5[%016lx] INSN6[%016lx] INSN7[%016lx]\n",
1208 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1209 info->icache_data[4],
1210 info->icache_data[5],
1211 info->icache_data[6],
1212 info->icache_data[7]);
1213 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016lx]\n",
1214 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1215 (int) info->ecache_index, info->ecache_tag);
1216 printk("%s" "ERROR(%d): E-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1217 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1218 info->ecache_data[0],
1219 info->ecache_data[1],
1220 info->ecache_data[2],
1221 info->ecache_data[3]);
1223 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1224 while (afsr != 0UL) {
1225 unsigned long bit = cheetah_get_hipri(afsr);
1227 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1228 (recoverable ? KERN_WARNING : KERN_CRIT),
1229 bit, cheetah_get_string(bit));
1235 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1238 static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1240 unsigned long afsr, afar;
1243 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1246 if ((afsr & cheetah_afsr_errors) != 0) {
1248 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1256 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1258 : : "r" (afsr), "i" (ASI_AFSR));
1263 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1265 struct cheetah_err_info local_snapshot, *p;
1269 cheetah_flush_ecache();
1271 p = cheetah_get_error_log(afsr);
1273 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1275 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1276 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1280 /* Grab snapshot of logged error. */
1281 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1283 /* If the current trap snapshot does not match what the
1284 * trap handler passed along into our args, big trouble.
1285 * In such a case, mark the local copy as invalid.
1287 * Else, it matches and we mark the afsr in the non-local
1288 * copy as invalid so we may log new error traps there.
1290 if (p->afsr != afsr || p->afar != afar)
1291 local_snapshot.afsr = CHAFSR_INVALID;
1293 p->afsr = CHAFSR_INVALID;
1295 cheetah_flush_icache();
1296 cheetah_flush_dcache();
1298 /* Re-enable I-cache/D-cache */
1299 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1300 "or %%g1, %1, %%g1\n\t"
1301 "stxa %%g1, [%%g0] %0\n\t"
1304 : "i" (ASI_DCU_CONTROL_REG),
1305 "i" (DCU_DC | DCU_IC)
1308 /* Re-enable error reporting */
1309 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1310 "or %%g1, %1, %%g1\n\t"
1311 "stxa %%g1, [%%g0] %0\n\t"
1314 : "i" (ASI_ESTATE_ERROR_EN),
1315 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1318 /* Decide if we can continue after handling this trap and
1319 * logging the error.
1322 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1325 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1326 * error was logged while we had error reporting traps disabled.
1328 if (cheetah_recheck_errors(&local_snapshot)) {
1329 unsigned long new_afsr = local_snapshot.afsr;
1331 /* If we got a new asynchronous error, die... */
1332 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1333 CHAFSR_WDU | CHAFSR_CPU |
1334 CHAFSR_IVU | CHAFSR_UE |
1335 CHAFSR_BERR | CHAFSR_TO))
1340 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1343 panic("Irrecoverable Fast-ECC error trap.\n");
1345 /* Flush E-cache to kick the error trap handlers out. */
1346 cheetah_flush_ecache();
1349 /* Try to fix a correctable error by pushing the line out from
1350 * the E-cache. Recheck error reporting registers to see if the
1351 * problem is intermittent.
1353 static int cheetah_fix_ce(unsigned long physaddr)
1355 unsigned long orig_estate;
1356 unsigned long alias1, alias2;
1359 /* Make sure correctable error traps are disabled. */
1360 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1361 "andn %0, %1, %%g1\n\t"
1362 "stxa %%g1, [%%g0] %2\n\t"
1364 : "=&r" (orig_estate)
1365 : "i" (ESTATE_ERROR_CEEN),
1366 "i" (ASI_ESTATE_ERROR_EN)
1369 /* We calculate alias addresses that will force the
1370 * cache line in question out of the E-cache. Then
1371 * we bring it back in with an atomic instruction so
1372 * that we get it in some modified/exclusive state,
1373 * then we displace it again to try and get proper ECC
1374 * pushed back into the system.
1376 physaddr &= ~(8UL - 1UL);
1377 alias1 = (ecache_flush_physbase +
1378 (physaddr & ((ecache_flush_size >> 1) - 1)));
1379 alias2 = alias1 + (ecache_flush_size >> 1);
1380 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1381 "ldxa [%1] %3, %%g0\n\t"
1382 "casxa [%2] %3, %%g0, %%g0\n\t"
1383 "membar #StoreLoad | #StoreStore\n\t"
1384 "ldxa [%0] %3, %%g0\n\t"
1385 "ldxa [%1] %3, %%g0\n\t"
1388 : "r" (alias1), "r" (alias2),
1389 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1391 /* Did that trigger another error? */
1392 if (cheetah_recheck_errors(NULL)) {
1393 /* Try one more time. */
1394 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1396 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1397 if (cheetah_recheck_errors(NULL))
1402 /* No new error, intermittent problem. */
1406 /* Restore error enables. */
1407 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1409 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1414 /* Return non-zero if PADDR is a valid physical memory address. */
1415 static int cheetah_check_main_memory(unsigned long paddr)
1417 unsigned long vaddr = PAGE_OFFSET + paddr;
1419 if (vaddr > (unsigned long) high_memory)
1422 return kern_addr_valid(vaddr);
1425 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1427 struct cheetah_err_info local_snapshot, *p;
1428 int recoverable, is_memory;
1430 p = cheetah_get_error_log(afsr);
1432 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1434 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1435 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1439 /* Grab snapshot of logged error. */
1440 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1442 /* If the current trap snapshot does not match what the
1443 * trap handler passed along into our args, big trouble.
1444 * In such a case, mark the local copy as invalid.
1446 * Else, it matches and we mark the afsr in the non-local
1447 * copy as invalid so we may log new error traps there.
1449 if (p->afsr != afsr || p->afar != afar)
1450 local_snapshot.afsr = CHAFSR_INVALID;
1452 p->afsr = CHAFSR_INVALID;
1454 is_memory = cheetah_check_main_memory(afar);
1456 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1457 /* XXX Might want to log the results of this operation
1458 * XXX somewhere... -DaveM
1460 cheetah_fix_ce(afar);
1464 int flush_all, flush_line;
1466 flush_all = flush_line = 0;
1467 if ((afsr & CHAFSR_EDC) != 0UL) {
1468 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1472 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1473 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1479 /* Trap handler only disabled I-cache, flush it. */
1480 cheetah_flush_icache();
1482 /* Re-enable I-cache */
1483 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1484 "or %%g1, %1, %%g1\n\t"
1485 "stxa %%g1, [%%g0] %0\n\t"
1488 : "i" (ASI_DCU_CONTROL_REG),
1493 cheetah_flush_ecache();
1494 else if (flush_line)
1495 cheetah_flush_ecache_line(afar);
1498 /* Re-enable error reporting */
1499 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1500 "or %%g1, %1, %%g1\n\t"
1501 "stxa %%g1, [%%g0] %0\n\t"
1504 : "i" (ASI_ESTATE_ERROR_EN),
1505 "i" (ESTATE_ERROR_CEEN)
1508 /* Decide if we can continue after handling this trap and
1509 * logging the error.
1512 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1515 /* Re-check AFSR/AFAR */
1516 (void) cheetah_recheck_errors(&local_snapshot);
1519 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1522 panic("Irrecoverable Correctable-ECC error trap.\n");
1525 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1527 struct cheetah_err_info local_snapshot, *p;
1528 int recoverable, is_memory;
1531 /* Check for the special PCI poke sequence. */
1532 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1533 cheetah_flush_icache();
1534 cheetah_flush_dcache();
1536 /* Re-enable I-cache/D-cache */
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_DCU_CONTROL_REG),
1543 "i" (DCU_DC | DCU_IC)
1546 /* Re-enable error reporting */
1547 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1548 "or %%g1, %1, %%g1\n\t"
1549 "stxa %%g1, [%%g0] %0\n\t"
1552 : "i" (ASI_ESTATE_ERROR_EN),
1553 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1556 (void) cheetah_recheck_errors(NULL);
1558 pci_poke_faulted = 1;
1560 regs->tnpc = regs->tpc + 4;
1565 p = cheetah_get_error_log(afsr);
1567 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1569 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1570 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1574 /* Grab snapshot of logged error. */
1575 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1577 /* If the current trap snapshot does not match what the
1578 * trap handler passed along into our args, big trouble.
1579 * In such a case, mark the local copy as invalid.
1581 * Else, it matches and we mark the afsr in the non-local
1582 * copy as invalid so we may log new error traps there.
1584 if (p->afsr != afsr || p->afar != afar)
1585 local_snapshot.afsr = CHAFSR_INVALID;
1587 p->afsr = CHAFSR_INVALID;
1589 is_memory = cheetah_check_main_memory(afar);
1592 int flush_all, flush_line;
1594 flush_all = flush_line = 0;
1595 if ((afsr & CHAFSR_EDU) != 0UL) {
1596 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1600 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1601 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1607 cheetah_flush_icache();
1608 cheetah_flush_dcache();
1610 /* Re-enable I/D caches */
1611 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1612 "or %%g1, %1, %%g1\n\t"
1613 "stxa %%g1, [%%g0] %0\n\t"
1616 : "i" (ASI_DCU_CONTROL_REG),
1617 "i" (DCU_IC | DCU_DC)
1621 cheetah_flush_ecache();
1622 else if (flush_line)
1623 cheetah_flush_ecache_line(afar);
1626 /* Re-enable error reporting */
1627 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1628 "or %%g1, %1, %%g1\n\t"
1629 "stxa %%g1, [%%g0] %0\n\t"
1632 : "i" (ASI_ESTATE_ERROR_EN),
1633 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1636 /* Decide if we can continue after handling this trap and
1637 * logging the error.
1640 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1643 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1644 * error was logged while we had error reporting traps disabled.
1646 if (cheetah_recheck_errors(&local_snapshot)) {
1647 unsigned long new_afsr = local_snapshot.afsr;
1649 /* If we got a new asynchronous error, die... */
1650 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1651 CHAFSR_WDU | CHAFSR_CPU |
1652 CHAFSR_IVU | CHAFSR_UE |
1653 CHAFSR_BERR | CHAFSR_TO))
1658 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1660 /* "Recoverable" here means we try to yank the page from ever
1661 * being newly used again. This depends upon a few things:
1662 * 1) Must be main memory, and AFAR must be valid.
1663 * 2) If we trapped from user, OK.
1664 * 3) Else, if we trapped from kernel we must find exception
1665 * table entry (ie. we have to have been accessing user
1668 * If AFAR is not in main memory, or we trapped from kernel
1669 * and cannot find an exception table entry, it is unacceptable
1670 * to try and continue.
1672 if (recoverable && is_memory) {
1673 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1674 /* OK, usermode access. */
1677 const struct exception_table_entry *entry;
1679 entry = search_exception_tables(regs->tpc);
1681 /* OK, kernel access to userspace. */
1685 /* BAD, privileged state is corrupted. */
1690 if (pfn_valid(afar >> PAGE_SHIFT))
1691 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1695 /* Only perform fixup if we still have a
1696 * recoverable condition.
1699 regs->tpc = entry->fixup;
1700 regs->tnpc = regs->tpc + 4;
1709 panic("Irrecoverable deferred error trap.\n");
1712 /* Handle a D/I cache parity error trap. TYPE is encoded as:
1714 * Bit0: 0=dcache,1=icache
1715 * Bit1: 0=recoverable,1=unrecoverable
1717 * The hardware has disabled both the I-cache and D-cache in
1718 * the %dcr register.
1720 void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1723 __cheetah_flush_icache();
1725 cheetah_plus_zap_dcache_parity();
1726 cheetah_flush_dcache();
1728 /* Re-enable I-cache/D-cache */
1729 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1730 "or %%g1, %1, %%g1\n\t"
1731 "stxa %%g1, [%%g0] %0\n\t"
1734 : "i" (ASI_DCU_CONTROL_REG),
1735 "i" (DCU_DC | DCU_IC)
1739 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1741 (type & 0x1) ? 'I' : 'D',
1743 panic("Irrecoverable Cheetah+ parity error.");
1746 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1748 (type & 0x1) ? 'I' : 'D',
1752 struct sun4v_error_entry {
1757 #define SUN4V_ERR_TYPE_UNDEFINED 0
1758 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1759 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1760 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1761 #define SUN4V_ERR_TYPE_WARNING_RES 4
1764 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1765 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1766 #define SUN4V_ERR_ATTRS_PIO 0x00000004
1767 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1768 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1769 #define SUN4V_ERR_ATTRS_USER_MODE 0x01000000
1770 #define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000
1771 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1779 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1780 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1782 static const char *sun4v_err_type_to_str(u32 type)
1785 case SUN4V_ERR_TYPE_UNDEFINED:
1787 case SUN4V_ERR_TYPE_UNCORRECTED_RES:
1788 return "uncorrected resumable";
1789 case SUN4V_ERR_TYPE_PRECISE_NONRES:
1790 return "precise nonresumable";
1791 case SUN4V_ERR_TYPE_DEFERRED_NONRES:
1792 return "deferred nonresumable";
1793 case SUN4V_ERR_TYPE_WARNING_RES:
1794 return "warning resumable";
1800 static void sun4v_log_error(struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
1804 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1805 printk("%s: err_handle[%lx] err_stick[%lx] err_type[%08x:%s]\n",
1807 ent->err_handle, ent->err_stick,
1809 sun4v_err_type_to_str(ent->err_type));
1810 printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n",
1813 ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ?
1815 ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ?
1817 ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ?
1819 ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ?
1820 "integer-regs" : ""),
1821 ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ?
1823 ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ?
1825 ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ?
1827 ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ?
1828 "queue-full" : ""));
1829 printk("%s: err_raddr[%016lx] err_size[%u] err_cpu[%u]\n",
1831 ent->err_raddr, ent->err_size, ent->err_cpu);
1833 if ((cnt = atomic_read(ocnt)) != 0) {
1834 atomic_set(ocnt, 0);
1836 printk("%s: Queue overflowed %d times.\n",
1841 /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate.
1842 * Log the event and clear the first word of the entry.
1844 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
1846 struct sun4v_error_entry *ent, local_copy;
1847 struct trap_per_cpu *tb;
1848 unsigned long paddr;
1853 tb = &trap_block[cpu];
1854 paddr = tb->resum_kernel_buf_pa + offset;
1857 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1859 /* We have a local copy now, so release the entry. */
1860 ent->err_handle = 0;
1865 sun4v_log_error(&local_copy, cpu,
1866 KERN_ERR "RESUMABLE ERROR",
1867 &sun4v_resum_oflow_cnt);
1870 /* If we try to printk() we'll probably make matters worse, by trying
1871 * to retake locks this cpu already holds or causing more errors. So
1872 * just bump a counter, and we'll report these counter bumps above.
1874 void sun4v_resum_overflow(struct pt_regs *regs)
1876 atomic_inc(&sun4v_resum_oflow_cnt);
1879 /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate.
1880 * Log the event, clear the first word of the entry, and die.
1882 void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
1884 struct sun4v_error_entry *ent, local_copy;
1885 struct trap_per_cpu *tb;
1886 unsigned long paddr;
1891 tb = &trap_block[cpu];
1892 paddr = tb->nonresum_kernel_buf_pa + offset;
1895 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1897 /* We have a local copy now, so release the entry. */
1898 ent->err_handle = 0;
1904 /* Check for the special PCI poke sequence. */
1905 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
1906 pci_poke_faulted = 1;
1908 regs->tnpc = regs->tpc + 4;
1913 sun4v_log_error(&local_copy, cpu,
1914 KERN_EMERG "NON-RESUMABLE ERROR",
1915 &sun4v_nonresum_oflow_cnt);
1917 panic("Non-resumable error.");
1920 /* If we try to printk() we'll probably make matters worse, by trying
1921 * to retake locks this cpu already holds or causing more errors. So
1922 * just bump a counter, and we'll report these counter bumps above.
1924 void sun4v_nonresum_overflow(struct pt_regs *regs)
1926 /* XXX Actually even this can make not that much sense. Perhaps
1927 * XXX we should just pull the plug and panic directly from here?
1929 atomic_inc(&sun4v_nonresum_oflow_cnt);
1932 unsigned long sun4v_err_itlb_vaddr;
1933 unsigned long sun4v_err_itlb_ctx;
1934 unsigned long sun4v_err_itlb_pte;
1935 unsigned long sun4v_err_itlb_error;
1937 void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
1940 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1942 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
1944 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
1945 "pte[%lx] error[%lx]\n",
1946 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
1947 sun4v_err_itlb_pte, sun4v_err_itlb_error);
1952 unsigned long sun4v_err_dtlb_vaddr;
1953 unsigned long sun4v_err_dtlb_ctx;
1954 unsigned long sun4v_err_dtlb_pte;
1955 unsigned long sun4v_err_dtlb_error;
1957 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
1960 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1962 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
1964 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
1965 "pte[%lx] error[%lx]\n",
1966 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
1967 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
1972 void hypervisor_tlbop_error(unsigned long err, unsigned long op)
1974 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
1978 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
1980 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
1984 void do_fpe_common(struct pt_regs *regs)
1986 if (regs->tstate & TSTATE_PRIV) {
1987 regs->tpc = regs->tnpc;
1990 unsigned long fsr = current_thread_info()->xfsr[0];
1993 if (test_thread_flag(TIF_32BIT)) {
1994 regs->tpc &= 0xffffffff;
1995 regs->tnpc &= 0xffffffff;
1997 info.si_signo = SIGFPE;
1999 info.si_addr = (void __user *)regs->tpc;
2001 info.si_code = __SI_FAULT;
2002 if ((fsr & 0x1c000) == (1 << 14)) {
2004 info.si_code = FPE_FLTINV;
2005 else if (fsr & 0x08)
2006 info.si_code = FPE_FLTOVF;
2007 else if (fsr & 0x04)
2008 info.si_code = FPE_FLTUND;
2009 else if (fsr & 0x02)
2010 info.si_code = FPE_FLTDIV;
2011 else if (fsr & 0x01)
2012 info.si_code = FPE_FLTRES;
2014 force_sig_info(SIGFPE, &info, current);
2018 void do_fpieee(struct pt_regs *regs)
2020 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2021 0, 0x24, SIGFPE) == NOTIFY_STOP)
2024 do_fpe_common(regs);
2027 extern int do_mathemu(struct pt_regs *, struct fpustate *);
2029 void do_fpother(struct pt_regs *regs)
2031 struct fpustate *f = FPUSTATE;
2034 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2035 0, 0x25, SIGFPE) == NOTIFY_STOP)
2038 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2039 case (2 << 14): /* unfinished_FPop */
2040 case (3 << 14): /* unimplemented_FPop */
2041 ret = do_mathemu(regs, f);
2046 do_fpe_common(regs);
2049 void do_tof(struct pt_regs *regs)
2053 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2054 0, 0x26, SIGEMT) == NOTIFY_STOP)
2057 if (regs->tstate & TSTATE_PRIV)
2058 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2059 if (test_thread_flag(TIF_32BIT)) {
2060 regs->tpc &= 0xffffffff;
2061 regs->tnpc &= 0xffffffff;
2063 info.si_signo = SIGEMT;
2065 info.si_code = EMT_TAGOVF;
2066 info.si_addr = (void __user *)regs->tpc;
2068 force_sig_info(SIGEMT, &info, current);
2071 void do_div0(struct pt_regs *regs)
2075 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2076 0, 0x28, SIGFPE) == NOTIFY_STOP)
2079 if (regs->tstate & TSTATE_PRIV)
2080 die_if_kernel("TL0: Kernel divide by zero.", regs);
2081 if (test_thread_flag(TIF_32BIT)) {
2082 regs->tpc &= 0xffffffff;
2083 regs->tnpc &= 0xffffffff;
2085 info.si_signo = SIGFPE;
2087 info.si_code = FPE_INTDIV;
2088 info.si_addr = (void __user *)regs->tpc;
2090 force_sig_info(SIGFPE, &info, current);
2093 void instruction_dump (unsigned int *pc)
2097 if ((((unsigned long) pc) & 3))
2100 printk("Instruction DUMP:");
2101 for (i = -3; i < 6; i++)
2102 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2106 static void user_instruction_dump (unsigned int __user *pc)
2109 unsigned int buf[9];
2111 if ((((unsigned long) pc) & 3))
2114 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2117 printk("Instruction DUMP:");
2118 for (i = 0; i < 9; i++)
2119 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2123 void show_stack(struct task_struct *tsk, unsigned long *_ksp)
2125 unsigned long pc, fp, thread_base, ksp;
2126 void *tp = task_stack_page(tsk);
2127 struct reg_window *rw;
2130 ksp = (unsigned long) _ksp;
2132 if (tp == current_thread_info())
2135 fp = ksp + STACK_BIAS;
2136 thread_base = (unsigned long) tp;
2138 printk("Call Trace:");
2139 #ifdef CONFIG_KALLSYMS
2143 /* Bogus frame pointer? */
2144 if (fp < (thread_base + sizeof(struct thread_info)) ||
2145 fp >= (thread_base + THREAD_SIZE))
2147 rw = (struct reg_window *)fp;
2149 printk(" [%016lx] ", pc);
2150 print_symbol("%s\n", pc);
2151 fp = rw->ins[6] + STACK_BIAS;
2152 } while (++count < 16);
2153 #ifndef CONFIG_KALLSYMS
2158 void dump_stack(void)
2162 __asm__ __volatile__("mov %%fp, %0"
2164 show_stack(current, ksp);
2167 EXPORT_SYMBOL(dump_stack);
2169 static inline int is_kernel_stack(struct task_struct *task,
2170 struct reg_window *rw)
2172 unsigned long rw_addr = (unsigned long) rw;
2173 unsigned long thread_base, thread_end;
2175 if (rw_addr < PAGE_OFFSET) {
2176 if (task != &init_task)
2180 thread_base = (unsigned long) task_stack_page(task);
2181 thread_end = thread_base + sizeof(union thread_union);
2182 if (rw_addr >= thread_base &&
2183 rw_addr < thread_end &&
2190 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2192 unsigned long fp = rw->ins[6];
2197 return (struct reg_window *) (fp + STACK_BIAS);
2200 void die_if_kernel(char *str, struct pt_regs *regs)
2202 static int die_counter;
2203 extern void __show_regs(struct pt_regs * regs);
2204 extern void smp_report_regs(void);
2207 /* Amuse the user. */
2210 " \"@'/ .. \\`@\"\n"
2214 printk("%s(%d): %s [#%d]\n", current->comm, current->pid, str, ++die_counter);
2215 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2216 __asm__ __volatile__("flushw");
2218 if (regs->tstate & TSTATE_PRIV) {
2219 struct reg_window *rw = (struct reg_window *)
2220 (regs->u_regs[UREG_FP] + STACK_BIAS);
2222 /* Stop the back trace when we hit userland or we
2223 * find some badly aligned kernel stack.
2227 is_kernel_stack(current, rw)) {
2228 printk("Caller[%016lx]", rw->ins[7]);
2229 print_symbol(": %s", rw->ins[7]);
2232 rw = kernel_stack_up(rw);
2234 instruction_dump ((unsigned int *) regs->tpc);
2236 if (test_thread_flag(TIF_32BIT)) {
2237 regs->tpc &= 0xffffffff;
2238 regs->tnpc &= 0xffffffff;
2240 user_instruction_dump ((unsigned int __user *) regs->tpc);
2247 if (regs->tstate & TSTATE_PRIV)
2252 extern int handle_popc(u32 insn, struct pt_regs *regs);
2253 extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
2255 void do_illegal_instruction(struct pt_regs *regs)
2257 unsigned long pc = regs->tpc;
2258 unsigned long tstate = regs->tstate;
2262 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2263 0, 0x10, SIGILL) == NOTIFY_STOP)
2266 if (tstate & TSTATE_PRIV)
2267 die_if_kernel("Kernel illegal instruction", regs);
2268 if (test_thread_flag(TIF_32BIT))
2270 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2271 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2272 if (handle_popc(insn, regs))
2274 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2275 if (handle_ldf_stq(insn, regs))
2277 } else if (tlb_type == hypervisor) {
2278 extern int vis_emul(struct pt_regs *, unsigned int);
2280 if (!vis_emul(regs, insn))
2284 info.si_signo = SIGILL;
2286 info.si_code = ILL_ILLOPC;
2287 info.si_addr = (void __user *)pc;
2289 force_sig_info(SIGILL, &info, current);
2292 extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
2294 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2298 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2299 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2302 if (regs->tstate & TSTATE_PRIV) {
2303 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2306 info.si_signo = SIGBUS;
2308 info.si_code = BUS_ADRALN;
2309 info.si_addr = (void __user *)sfar;
2311 force_sig_info(SIGBUS, &info, current);
2314 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2318 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2319 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2322 if (regs->tstate & TSTATE_PRIV) {
2323 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2326 info.si_signo = SIGBUS;
2328 info.si_code = BUS_ADRALN;
2329 info.si_addr = (void __user *) addr;
2331 force_sig_info(SIGBUS, &info, current);
2334 void do_privop(struct pt_regs *regs)
2338 if (notify_die(DIE_TRAP, "privileged operation", regs,
2339 0, 0x11, SIGILL) == NOTIFY_STOP)
2342 if (test_thread_flag(TIF_32BIT)) {
2343 regs->tpc &= 0xffffffff;
2344 regs->tnpc &= 0xffffffff;
2346 info.si_signo = SIGILL;
2348 info.si_code = ILL_PRVOPC;
2349 info.si_addr = (void __user *)regs->tpc;
2351 force_sig_info(SIGILL, &info, current);
2354 void do_privact(struct pt_regs *regs)
2359 /* Trap level 1 stuff or other traps we should never see... */
2360 void do_cee(struct pt_regs *regs)
2362 die_if_kernel("TL0: Cache Error Exception", regs);
2365 void do_cee_tl1(struct pt_regs *regs)
2367 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2368 die_if_kernel("TL1: Cache Error Exception", regs);
2371 void do_dae_tl1(struct pt_regs *regs)
2373 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2374 die_if_kernel("TL1: Data Access Exception", regs);
2377 void do_iae_tl1(struct pt_regs *regs)
2379 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2380 die_if_kernel("TL1: Instruction Access Exception", regs);
2383 void do_div0_tl1(struct pt_regs *regs)
2385 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2386 die_if_kernel("TL1: DIV0 Exception", regs);
2389 void do_fpdis_tl1(struct pt_regs *regs)
2391 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2392 die_if_kernel("TL1: FPU Disabled", regs);
2395 void do_fpieee_tl1(struct pt_regs *regs)
2397 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2398 die_if_kernel("TL1: FPU IEEE Exception", regs);
2401 void do_fpother_tl1(struct pt_regs *regs)
2403 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2404 die_if_kernel("TL1: FPU Other Exception", regs);
2407 void do_ill_tl1(struct pt_regs *regs)
2409 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2410 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2413 void do_irq_tl1(struct pt_regs *regs)
2415 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2416 die_if_kernel("TL1: IRQ Exception", regs);
2419 void do_lddfmna_tl1(struct pt_regs *regs)
2421 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2422 die_if_kernel("TL1: LDDF Exception", regs);
2425 void do_stdfmna_tl1(struct pt_regs *regs)
2427 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2428 die_if_kernel("TL1: STDF Exception", regs);
2431 void do_paw(struct pt_regs *regs)
2433 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2436 void do_paw_tl1(struct pt_regs *regs)
2438 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2439 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2442 void do_vaw(struct pt_regs *regs)
2444 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2447 void do_vaw_tl1(struct pt_regs *regs)
2449 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2450 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2453 void do_tof_tl1(struct pt_regs *regs)
2455 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2456 die_if_kernel("TL1: Tag Overflow Exception", regs);
2459 void do_getpsr(struct pt_regs *regs)
2461 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2462 regs->tpc = regs->tnpc;
2464 if (test_thread_flag(TIF_32BIT)) {
2465 regs->tpc &= 0xffffffff;
2466 regs->tnpc &= 0xffffffff;
2470 struct trap_per_cpu trap_block[NR_CPUS];
2472 /* This can get invoked before sched_init() so play it super safe
2473 * and use hard_smp_processor_id().
2475 void init_cur_cpu_trap(struct thread_info *t)
2477 int cpu = hard_smp_processor_id();
2478 struct trap_per_cpu *p = &trap_block[cpu];
2484 extern void thread_info_offsets_are_bolixed_dave(void);
2485 extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2486 extern void tsb_config_offsets_are_bolixed_dave(void);
2488 /* Only invoked on boot processor. */
2489 void __init trap_init(void)
2491 /* Compile time sanity check. */
2492 if (TI_TASK != offsetof(struct thread_info, task) ||
2493 TI_FLAGS != offsetof(struct thread_info, flags) ||
2494 TI_CPU != offsetof(struct thread_info, cpu) ||
2495 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2496 TI_KSP != offsetof(struct thread_info, ksp) ||
2497 TI_FAULT_ADDR != offsetof(struct thread_info, fault_address) ||
2498 TI_KREGS != offsetof(struct thread_info, kregs) ||
2499 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2500 TI_EXEC_DOMAIN != offsetof(struct thread_info, exec_domain) ||
2501 TI_REG_WINDOW != offsetof(struct thread_info, reg_window) ||
2502 TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) ||
2503 TI_GSR != offsetof(struct thread_info, gsr) ||
2504 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2505 TI_USER_CNTD0 != offsetof(struct thread_info, user_cntd0) ||
2506 TI_USER_CNTD1 != offsetof(struct thread_info, user_cntd1) ||
2507 TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) ||
2508 TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) ||
2509 TI_PCR != offsetof(struct thread_info, pcr_reg) ||
2510 TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) ||
2511 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2512 TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) ||
2513 TI_RESTART_BLOCK != offsetof(struct thread_info, restart_block) ||
2514 TI_KUNA_REGS != offsetof(struct thread_info, kern_una_regs) ||
2515 TI_KUNA_INSN != offsetof(struct thread_info, kern_una_insn) ||
2516 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2517 (TI_FPREGS & (64 - 1)))
2518 thread_info_offsets_are_bolixed_dave();
2520 if (TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, thread) ||
2521 (TRAP_PER_CPU_PGD_PADDR !=
2522 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2523 (TRAP_PER_CPU_CPU_MONDO_PA !=
2524 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2525 (TRAP_PER_CPU_DEV_MONDO_PA !=
2526 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2527 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2528 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2529 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2530 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2531 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2532 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2533 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2534 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2535 (TRAP_PER_CPU_FAULT_INFO !=
2536 offsetof(struct trap_per_cpu, fault_info)) ||
2537 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2538 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2539 (TRAP_PER_CPU_CPU_LIST_PA !=
2540 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2541 (TRAP_PER_CPU_TSB_HUGE !=
2542 offsetof(struct trap_per_cpu, tsb_huge)) ||
2543 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2544 offsetof(struct trap_per_cpu, tsb_huge_temp)))
2545 trap_per_cpu_offsets_are_bolixed_dave();
2547 if ((TSB_CONFIG_TSB !=
2548 offsetof(struct tsb_config, tsb)) ||
2549 (TSB_CONFIG_RSS_LIMIT !=
2550 offsetof(struct tsb_config, tsb_rss_limit)) ||
2551 (TSB_CONFIG_NENTRIES !=
2552 offsetof(struct tsb_config, tsb_nentries)) ||
2553 (TSB_CONFIG_REG_VAL !=
2554 offsetof(struct tsb_config, tsb_reg_val)) ||
2555 (TSB_CONFIG_MAP_VADDR !=
2556 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2557 (TSB_CONFIG_MAP_PTE !=
2558 offsetof(struct tsb_config, tsb_map_pte)))
2559 tsb_config_offsets_are_bolixed_dave();
2561 /* Attach to the address space of init_task. On SMP we
2562 * do this in smp.c:smp_callin for other cpus.
2564 atomic_inc(&init_mm.mm_count);
2565 current->active_mm = &init_mm;