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/module.h>
13 #include <linux/sched.h>
14 #include <linux/kernel.h>
15 #include <linux/kallsyms.h>
16 #include <linux/signal.h>
17 #include <linux/smp.h>
19 #include <linux/init.h>
20 #include <linux/kdebug.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>
42 #include <linux/kmod.h>
47 /* When an irrecoverable trap occurs at tl > 0, the trap entry
48 * code logs the trap state registers at every level in the trap
49 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
62 static void dump_tl1_traplog(struct tl1_traplog *p)
66 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
67 "dumping track stack.\n", p->tl);
69 limit = (tlb_type == hypervisor) ? 2 : 4;
70 for (i = 0; i < limit; i++) {
72 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
73 "TNPC[%016lx] TT[%lx]\n",
75 p->trapstack[i].tstate, p->trapstack[i].tpc,
76 p->trapstack[i].tnpc, p->trapstack[i].tt);
77 print_symbol("TRAPLOG: TPC<%s>\n", p->trapstack[i].tpc);
81 void do_call_debug(struct pt_regs *regs)
83 notify_die(DIE_CALL, "debug call", regs, 0, 255, SIGINT);
86 void bad_trap(struct pt_regs *regs, long lvl)
91 if (notify_die(DIE_TRAP, "bad trap", regs,
92 0, lvl, SIGTRAP) == NOTIFY_STOP)
96 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
97 die_if_kernel(buffer, regs);
101 if (regs->tstate & TSTATE_PRIV) {
102 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
103 die_if_kernel(buffer, regs);
105 if (test_thread_flag(TIF_32BIT)) {
106 regs->tpc &= 0xffffffff;
107 regs->tnpc &= 0xffffffff;
109 info.si_signo = SIGILL;
111 info.si_code = ILL_ILLTRP;
112 info.si_addr = (void __user *)regs->tpc;
113 info.si_trapno = lvl;
114 force_sig_info(SIGILL, &info, current);
117 void bad_trap_tl1(struct pt_regs *regs, long lvl)
121 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
122 0, lvl, SIGTRAP) == NOTIFY_STOP)
125 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
127 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
128 die_if_kernel (buffer, regs);
131 #ifdef CONFIG_DEBUG_BUGVERBOSE
132 void do_BUG(const char *file, int line)
135 printk("kernel BUG at %s:%d!\n", file, line);
139 void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
143 if (notify_die(DIE_TRAP, "instruction access exception", regs,
144 0, 0x8, SIGTRAP) == NOTIFY_STOP)
147 if (regs->tstate & TSTATE_PRIV) {
148 printk("spitfire_insn_access_exception: SFSR[%016lx] "
149 "SFAR[%016lx], going.\n", sfsr, sfar);
150 die_if_kernel("Iax", regs);
152 if (test_thread_flag(TIF_32BIT)) {
153 regs->tpc &= 0xffffffff;
154 regs->tnpc &= 0xffffffff;
156 info.si_signo = SIGSEGV;
158 info.si_code = SEGV_MAPERR;
159 info.si_addr = (void __user *)regs->tpc;
161 force_sig_info(SIGSEGV, &info, current);
164 void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
166 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
167 0, 0x8, SIGTRAP) == NOTIFY_STOP)
170 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
171 spitfire_insn_access_exception(regs, sfsr, sfar);
174 void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
176 unsigned short type = (type_ctx >> 16);
177 unsigned short ctx = (type_ctx & 0xffff);
180 if (notify_die(DIE_TRAP, "instruction access exception", regs,
181 0, 0x8, SIGTRAP) == NOTIFY_STOP)
184 if (regs->tstate & TSTATE_PRIV) {
185 printk("sun4v_insn_access_exception: ADDR[%016lx] "
186 "CTX[%04x] TYPE[%04x], going.\n",
188 die_if_kernel("Iax", regs);
191 if (test_thread_flag(TIF_32BIT)) {
192 regs->tpc &= 0xffffffff;
193 regs->tnpc &= 0xffffffff;
195 info.si_signo = SIGSEGV;
197 info.si_code = SEGV_MAPERR;
198 info.si_addr = (void __user *) addr;
200 force_sig_info(SIGSEGV, &info, current);
203 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
205 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
206 0, 0x8, SIGTRAP) == NOTIFY_STOP)
209 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
210 sun4v_insn_access_exception(regs, addr, type_ctx);
213 void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
217 if (notify_die(DIE_TRAP, "data access exception", regs,
218 0, 0x30, SIGTRAP) == NOTIFY_STOP)
221 if (regs->tstate & TSTATE_PRIV) {
222 /* Test if this comes from uaccess places. */
223 const struct exception_table_entry *entry;
225 entry = search_exception_tables(regs->tpc);
227 /* Ouch, somebody is trying VM hole tricks on us... */
228 #ifdef DEBUG_EXCEPTIONS
229 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
230 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
231 regs->tpc, entry->fixup);
233 regs->tpc = entry->fixup;
234 regs->tnpc = regs->tpc + 4;
238 printk("spitfire_data_access_exception: SFSR[%016lx] "
239 "SFAR[%016lx], going.\n", sfsr, sfar);
240 die_if_kernel("Dax", regs);
243 info.si_signo = SIGSEGV;
245 info.si_code = SEGV_MAPERR;
246 info.si_addr = (void __user *)sfar;
248 force_sig_info(SIGSEGV, &info, current);
251 void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
253 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
254 0, 0x30, SIGTRAP) == NOTIFY_STOP)
257 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
258 spitfire_data_access_exception(regs, sfsr, sfar);
261 void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
263 unsigned short type = (type_ctx >> 16);
264 unsigned short ctx = (type_ctx & 0xffff);
267 if (notify_die(DIE_TRAP, "data access exception", regs,
268 0, 0x8, SIGTRAP) == NOTIFY_STOP)
271 if (regs->tstate & TSTATE_PRIV) {
272 printk("sun4v_data_access_exception: ADDR[%016lx] "
273 "CTX[%04x] TYPE[%04x], going.\n",
275 die_if_kernel("Dax", regs);
278 if (test_thread_flag(TIF_32BIT)) {
279 regs->tpc &= 0xffffffff;
280 regs->tnpc &= 0xffffffff;
282 info.si_signo = SIGSEGV;
284 info.si_code = SEGV_MAPERR;
285 info.si_addr = (void __user *) addr;
287 force_sig_info(SIGSEGV, &info, current);
290 void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
292 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
293 0, 0x8, SIGTRAP) == NOTIFY_STOP)
296 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
297 sun4v_data_access_exception(regs, addr, type_ctx);
301 /* This is really pathetic... */
302 extern volatile int pci_poke_in_progress;
303 extern volatile int pci_poke_cpu;
304 extern volatile int pci_poke_faulted;
307 /* When access exceptions happen, we must do this. */
308 static void spitfire_clean_and_reenable_l1_caches(void)
312 if (tlb_type != spitfire)
316 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
317 spitfire_put_icache_tag(va, 0x0);
318 spitfire_put_dcache_tag(va, 0x0);
321 /* Re-enable in LSU. */
322 __asm__ __volatile__("flush %%g6\n\t"
324 "stxa %0, [%%g0] %1\n\t"
327 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
328 LSU_CONTROL_IM | LSU_CONTROL_DM),
329 "i" (ASI_LSU_CONTROL)
333 static void spitfire_enable_estate_errors(void)
335 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
338 : "r" (ESTATE_ERR_ALL),
339 "i" (ASI_ESTATE_ERROR_EN));
342 static char ecc_syndrome_table[] = {
343 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
344 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
345 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
346 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
347 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
348 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
349 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
350 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
351 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
352 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
353 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
354 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
355 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
356 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
357 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
358 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
359 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
360 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
361 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
362 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
363 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
364 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
365 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
366 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
367 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
368 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
369 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
370 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
371 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
372 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
373 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
374 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
377 static char *syndrome_unknown = "<Unknown>";
379 static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
381 unsigned short scode;
382 char memmod_str[64], *p;
385 scode = ecc_syndrome_table[udbl & 0xff];
386 if (prom_getunumber(scode, afar,
387 memmod_str, sizeof(memmod_str)) == -1)
388 p = syndrome_unknown;
391 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
392 "Memory Module \"%s\"\n",
393 smp_processor_id(), scode, p);
397 scode = ecc_syndrome_table[udbh & 0xff];
398 if (prom_getunumber(scode, afar,
399 memmod_str, sizeof(memmod_str)) == -1)
400 p = syndrome_unknown;
403 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
404 "Memory Module \"%s\"\n",
405 smp_processor_id(), scode, p);
410 static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
413 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
414 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
415 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
417 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
419 /* We always log it, even if someone is listening for this
422 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
423 0, TRAP_TYPE_CEE, SIGTRAP);
425 /* The Correctable ECC Error trap does not disable I/D caches. So
426 * we only have to restore the ESTATE Error Enable register.
428 spitfire_enable_estate_errors();
431 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)
435 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
436 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
437 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
439 /* XXX add more human friendly logging of the error status
440 * XXX as is implemented for cheetah
443 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
445 /* We always log it, even if someone is listening for this
448 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
451 if (regs->tstate & TSTATE_PRIV) {
453 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
454 die_if_kernel("UE", regs);
457 /* XXX need more intelligent processing here, such as is implemented
458 * XXX for cheetah errors, in fact if the E-cache still holds the
459 * XXX line with bad parity this will loop
462 spitfire_clean_and_reenable_l1_caches();
463 spitfire_enable_estate_errors();
465 if (test_thread_flag(TIF_32BIT)) {
466 regs->tpc &= 0xffffffff;
467 regs->tnpc &= 0xffffffff;
469 info.si_signo = SIGBUS;
471 info.si_code = BUS_OBJERR;
472 info.si_addr = (void *)0;
474 force_sig_info(SIGBUS, &info, current);
477 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
479 unsigned long afsr, tt, udbh, udbl;
482 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
483 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
484 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
485 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
486 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
489 if (tt == TRAP_TYPE_DAE &&
490 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
491 spitfire_clean_and_reenable_l1_caches();
492 spitfire_enable_estate_errors();
494 pci_poke_faulted = 1;
495 regs->tnpc = regs->tpc + 4;
500 if (afsr & SFAFSR_UE)
501 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
503 if (tt == TRAP_TYPE_CEE) {
504 /* Handle the case where we took a CEE trap, but ACK'd
505 * only the UE state in the UDB error registers.
507 if (afsr & SFAFSR_UE) {
508 if (udbh & UDBE_CE) {
509 __asm__ __volatile__(
510 "stxa %0, [%1] %2\n\t"
513 : "r" (udbh & UDBE_CE),
514 "r" (0x0), "i" (ASI_UDB_ERROR_W));
516 if (udbl & UDBE_CE) {
517 __asm__ __volatile__(
518 "stxa %0, [%1] %2\n\t"
521 : "r" (udbl & UDBE_CE),
522 "r" (0x18), "i" (ASI_UDB_ERROR_W));
526 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
530 int cheetah_pcache_forced_on;
532 void cheetah_enable_pcache(void)
536 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
539 __asm__ __volatile__("ldxa [%%g0] %1, %0"
541 : "i" (ASI_DCU_CONTROL_REG));
542 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
543 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
546 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
549 /* Cheetah error trap handling. */
550 static unsigned long ecache_flush_physbase;
551 static unsigned long ecache_flush_linesize;
552 static unsigned long ecache_flush_size;
554 /* WARNING: The error trap handlers in assembly know the precise
555 * layout of the following structure.
557 * C-level handlers below use this information to log the error
558 * and then determine how to recover (if possible).
560 struct cheetah_err_info {
565 /*0x10*/u64 dcache_data[4]; /* The actual data */
566 /*0x30*/u64 dcache_index; /* D-cache index */
567 /*0x38*/u64 dcache_tag; /* D-cache tag/valid */
568 /*0x40*/u64 dcache_utag; /* D-cache microtag */
569 /*0x48*/u64 dcache_stag; /* D-cache snooptag */
572 /*0x50*/u64 icache_data[8]; /* The actual insns + predecode */
573 /*0x90*/u64 icache_index; /* I-cache index */
574 /*0x98*/u64 icache_tag; /* I-cache phys tag */
575 /*0xa0*/u64 icache_utag; /* I-cache microtag */
576 /*0xa8*/u64 icache_stag; /* I-cache snooptag */
577 /*0xb0*/u64 icache_upper; /* I-cache upper-tag */
578 /*0xb8*/u64 icache_lower; /* I-cache lower-tag */
581 /*0xc0*/u64 ecache_data[4]; /* 32 bytes from staging registers */
582 /*0xe0*/u64 ecache_index; /* E-cache index */
583 /*0xe8*/u64 ecache_tag; /* E-cache tag/state */
585 /*0xf0*/u64 __pad[32 - 30];
587 #define CHAFSR_INVALID ((u64)-1L)
589 /* This table is ordered in priority of errors and matches the
590 * AFAR overwrite policy as well.
593 struct afsr_error_table {
598 static const char CHAFSR_PERR_msg[] =
599 "System interface protocol error";
600 static const char CHAFSR_IERR_msg[] =
601 "Internal processor error";
602 static const char CHAFSR_ISAP_msg[] =
603 "System request parity error on incoming addresss";
604 static const char CHAFSR_UCU_msg[] =
605 "Uncorrectable E-cache ECC error for ifetch/data";
606 static const char CHAFSR_UCC_msg[] =
607 "SW Correctable E-cache ECC error for ifetch/data";
608 static const char CHAFSR_UE_msg[] =
609 "Uncorrectable system bus data ECC error for read";
610 static const char CHAFSR_EDU_msg[] =
611 "Uncorrectable E-cache ECC error for stmerge/blkld";
612 static const char CHAFSR_EMU_msg[] =
613 "Uncorrectable system bus MTAG error";
614 static const char CHAFSR_WDU_msg[] =
615 "Uncorrectable E-cache ECC error for writeback";
616 static const char CHAFSR_CPU_msg[] =
617 "Uncorrectable ECC error for copyout";
618 static const char CHAFSR_CE_msg[] =
619 "HW corrected system bus data ECC error for read";
620 static const char CHAFSR_EDC_msg[] =
621 "HW corrected E-cache ECC error for stmerge/blkld";
622 static const char CHAFSR_EMC_msg[] =
623 "HW corrected system bus MTAG ECC error";
624 static const char CHAFSR_WDC_msg[] =
625 "HW corrected E-cache ECC error for writeback";
626 static const char CHAFSR_CPC_msg[] =
627 "HW corrected ECC error for copyout";
628 static const char CHAFSR_TO_msg[] =
629 "Unmapped error from system bus";
630 static const char CHAFSR_BERR_msg[] =
631 "Bus error response from system bus";
632 static const char CHAFSR_IVC_msg[] =
633 "HW corrected system bus data ECC error for ivec read";
634 static const char CHAFSR_IVU_msg[] =
635 "Uncorrectable system bus data ECC error for ivec read";
636 static struct afsr_error_table __cheetah_error_table[] = {
637 { CHAFSR_PERR, CHAFSR_PERR_msg },
638 { CHAFSR_IERR, CHAFSR_IERR_msg },
639 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
640 { CHAFSR_UCU, CHAFSR_UCU_msg },
641 { CHAFSR_UCC, CHAFSR_UCC_msg },
642 { CHAFSR_UE, CHAFSR_UE_msg },
643 { CHAFSR_EDU, CHAFSR_EDU_msg },
644 { CHAFSR_EMU, CHAFSR_EMU_msg },
645 { CHAFSR_WDU, CHAFSR_WDU_msg },
646 { CHAFSR_CPU, CHAFSR_CPU_msg },
647 { CHAFSR_CE, CHAFSR_CE_msg },
648 { CHAFSR_EDC, CHAFSR_EDC_msg },
649 { CHAFSR_EMC, CHAFSR_EMC_msg },
650 { CHAFSR_WDC, CHAFSR_WDC_msg },
651 { CHAFSR_CPC, CHAFSR_CPC_msg },
652 { CHAFSR_TO, CHAFSR_TO_msg },
653 { CHAFSR_BERR, CHAFSR_BERR_msg },
654 /* These two do not update the AFAR. */
655 { CHAFSR_IVC, CHAFSR_IVC_msg },
656 { CHAFSR_IVU, CHAFSR_IVU_msg },
659 static const char CHPAFSR_DTO_msg[] =
660 "System bus unmapped error for prefetch/storequeue-read";
661 static const char CHPAFSR_DBERR_msg[] =
662 "System bus error for prefetch/storequeue-read";
663 static const char CHPAFSR_THCE_msg[] =
664 "Hardware corrected E-cache Tag ECC error";
665 static const char CHPAFSR_TSCE_msg[] =
666 "SW handled correctable E-cache Tag ECC error";
667 static const char CHPAFSR_TUE_msg[] =
668 "Uncorrectable E-cache Tag ECC error";
669 static const char CHPAFSR_DUE_msg[] =
670 "System bus uncorrectable data ECC error due to prefetch/store-fill";
671 static struct afsr_error_table __cheetah_plus_error_table[] = {
672 { CHAFSR_PERR, CHAFSR_PERR_msg },
673 { CHAFSR_IERR, CHAFSR_IERR_msg },
674 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
675 { CHAFSR_UCU, CHAFSR_UCU_msg },
676 { CHAFSR_UCC, CHAFSR_UCC_msg },
677 { CHAFSR_UE, CHAFSR_UE_msg },
678 { CHAFSR_EDU, CHAFSR_EDU_msg },
679 { CHAFSR_EMU, CHAFSR_EMU_msg },
680 { CHAFSR_WDU, CHAFSR_WDU_msg },
681 { CHAFSR_CPU, CHAFSR_CPU_msg },
682 { CHAFSR_CE, CHAFSR_CE_msg },
683 { CHAFSR_EDC, CHAFSR_EDC_msg },
684 { CHAFSR_EMC, CHAFSR_EMC_msg },
685 { CHAFSR_WDC, CHAFSR_WDC_msg },
686 { CHAFSR_CPC, CHAFSR_CPC_msg },
687 { CHAFSR_TO, CHAFSR_TO_msg },
688 { CHAFSR_BERR, CHAFSR_BERR_msg },
689 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
690 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
691 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
692 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
693 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
694 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
695 /* These two do not update the AFAR. */
696 { CHAFSR_IVC, CHAFSR_IVC_msg },
697 { CHAFSR_IVU, CHAFSR_IVU_msg },
700 static const char JPAFSR_JETO_msg[] =
701 "System interface protocol error, hw timeout caused";
702 static const char JPAFSR_SCE_msg[] =
703 "Parity error on system snoop results";
704 static const char JPAFSR_JEIC_msg[] =
705 "System interface protocol error, illegal command detected";
706 static const char JPAFSR_JEIT_msg[] =
707 "System interface protocol error, illegal ADTYPE detected";
708 static const char JPAFSR_OM_msg[] =
709 "Out of range memory error has occurred";
710 static const char JPAFSR_ETP_msg[] =
711 "Parity error on L2 cache tag SRAM";
712 static const char JPAFSR_UMS_msg[] =
713 "Error due to unsupported store";
714 static const char JPAFSR_RUE_msg[] =
715 "Uncorrectable ECC error from remote cache/memory";
716 static const char JPAFSR_RCE_msg[] =
717 "Correctable ECC error from remote cache/memory";
718 static const char JPAFSR_BP_msg[] =
719 "JBUS parity error on returned read data";
720 static const char JPAFSR_WBP_msg[] =
721 "JBUS parity error on data for writeback or block store";
722 static const char JPAFSR_FRC_msg[] =
723 "Foreign read to DRAM incurring correctable ECC error";
724 static const char JPAFSR_FRU_msg[] =
725 "Foreign read to DRAM incurring uncorrectable ECC error";
726 static struct afsr_error_table __jalapeno_error_table[] = {
727 { JPAFSR_JETO, JPAFSR_JETO_msg },
728 { JPAFSR_SCE, JPAFSR_SCE_msg },
729 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
730 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
731 { CHAFSR_PERR, CHAFSR_PERR_msg },
732 { CHAFSR_IERR, CHAFSR_IERR_msg },
733 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
734 { CHAFSR_UCU, CHAFSR_UCU_msg },
735 { CHAFSR_UCC, CHAFSR_UCC_msg },
736 { CHAFSR_UE, CHAFSR_UE_msg },
737 { CHAFSR_EDU, CHAFSR_EDU_msg },
738 { JPAFSR_OM, JPAFSR_OM_msg },
739 { CHAFSR_WDU, CHAFSR_WDU_msg },
740 { CHAFSR_CPU, CHAFSR_CPU_msg },
741 { CHAFSR_CE, CHAFSR_CE_msg },
742 { CHAFSR_EDC, CHAFSR_EDC_msg },
743 { JPAFSR_ETP, JPAFSR_ETP_msg },
744 { CHAFSR_WDC, CHAFSR_WDC_msg },
745 { CHAFSR_CPC, CHAFSR_CPC_msg },
746 { CHAFSR_TO, CHAFSR_TO_msg },
747 { CHAFSR_BERR, CHAFSR_BERR_msg },
748 { JPAFSR_UMS, JPAFSR_UMS_msg },
749 { JPAFSR_RUE, JPAFSR_RUE_msg },
750 { JPAFSR_RCE, JPAFSR_RCE_msg },
751 { JPAFSR_BP, JPAFSR_BP_msg },
752 { JPAFSR_WBP, JPAFSR_WBP_msg },
753 { JPAFSR_FRC, JPAFSR_FRC_msg },
754 { JPAFSR_FRU, JPAFSR_FRU_msg },
755 /* These two do not update the AFAR. */
756 { CHAFSR_IVU, CHAFSR_IVU_msg },
759 static struct afsr_error_table *cheetah_error_table;
760 static unsigned long cheetah_afsr_errors;
762 /* This is allocated at boot time based upon the largest hardware
763 * cpu ID in the system. We allocate two entries per cpu, one for
764 * TL==0 logging and one for TL >= 1 logging.
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 extern int chmc_getunumber(int, unsigned long, char *, int);
1113 static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1114 unsigned long afsr, unsigned long afar, int recoverable)
1116 unsigned long hipri;
1119 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1120 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1122 (afsr & CHAFSR_TL1) ? 1 : 0);
1123 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1124 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1125 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1126 printk("%s" "ERROR(%d): ",
1127 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1128 print_symbol("TPC<%s>\n", regs->tpc);
1129 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1130 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1131 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1132 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1133 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1134 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1135 hipri = cheetah_get_hipri(afsr);
1136 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1137 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1138 hipri, cheetah_get_string(hipri));
1140 /* Try to get unumber if relevant. */
1141 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1142 CHAFSR_CPC | CHAFSR_CPU | \
1143 CHAFSR_UE | CHAFSR_CE | \
1144 CHAFSR_EDC | CHAFSR_EDU | \
1145 CHAFSR_UCC | CHAFSR_UCU | \
1146 CHAFSR_WDU | CHAFSR_WDC)
1147 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1148 if (afsr & ESYND_ERRORS) {
1152 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1153 syndrome = cheetah_ecc_syntab[syndrome];
1154 ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum));
1156 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1157 (recoverable ? KERN_WARNING : KERN_CRIT),
1158 smp_processor_id(), unum);
1159 } else if (afsr & MSYND_ERRORS) {
1163 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1164 syndrome = cheetah_mtag_syntab[syndrome];
1165 ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum));
1167 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1168 (recoverable ? KERN_WARNING : KERN_CRIT),
1169 smp_processor_id(), unum);
1172 /* Now dump the cache snapshots. */
1173 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx]\n",
1174 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1175 (int) info->dcache_index,
1179 printk("%s" "ERROR(%d): D-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1180 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1181 info->dcache_data[0],
1182 info->dcache_data[1],
1183 info->dcache_data[2],
1184 info->dcache_data[3]);
1185 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx] "
1186 "u[%016lx] l[%016lx]\n",
1187 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1188 (int) info->icache_index,
1193 info->icache_lower);
1194 printk("%s" "ERROR(%d): I-cache INSN0[%016lx] INSN1[%016lx] INSN2[%016lx] INSN3[%016lx]\n",
1195 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1196 info->icache_data[0],
1197 info->icache_data[1],
1198 info->icache_data[2],
1199 info->icache_data[3]);
1200 printk("%s" "ERROR(%d): I-cache INSN4[%016lx] INSN5[%016lx] INSN6[%016lx] INSN7[%016lx]\n",
1201 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1202 info->icache_data[4],
1203 info->icache_data[5],
1204 info->icache_data[6],
1205 info->icache_data[7]);
1206 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016lx]\n",
1207 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1208 (int) info->ecache_index, info->ecache_tag);
1209 printk("%s" "ERROR(%d): E-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1210 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1211 info->ecache_data[0],
1212 info->ecache_data[1],
1213 info->ecache_data[2],
1214 info->ecache_data[3]);
1216 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1217 while (afsr != 0UL) {
1218 unsigned long bit = cheetah_get_hipri(afsr);
1220 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1221 (recoverable ? KERN_WARNING : KERN_CRIT),
1222 bit, cheetah_get_string(bit));
1228 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1231 static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1233 unsigned long afsr, afar;
1236 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1239 if ((afsr & cheetah_afsr_errors) != 0) {
1241 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1249 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1251 : : "r" (afsr), "i" (ASI_AFSR));
1256 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1258 struct cheetah_err_info local_snapshot, *p;
1262 cheetah_flush_ecache();
1264 p = cheetah_get_error_log(afsr);
1266 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1268 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1269 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1273 /* Grab snapshot of logged error. */
1274 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1276 /* If the current trap snapshot does not match what the
1277 * trap handler passed along into our args, big trouble.
1278 * In such a case, mark the local copy as invalid.
1280 * Else, it matches and we mark the afsr in the non-local
1281 * copy as invalid so we may log new error traps there.
1283 if (p->afsr != afsr || p->afar != afar)
1284 local_snapshot.afsr = CHAFSR_INVALID;
1286 p->afsr = CHAFSR_INVALID;
1288 cheetah_flush_icache();
1289 cheetah_flush_dcache();
1291 /* Re-enable I-cache/D-cache */
1292 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1293 "or %%g1, %1, %%g1\n\t"
1294 "stxa %%g1, [%%g0] %0\n\t"
1297 : "i" (ASI_DCU_CONTROL_REG),
1298 "i" (DCU_DC | DCU_IC)
1301 /* Re-enable error reporting */
1302 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1303 "or %%g1, %1, %%g1\n\t"
1304 "stxa %%g1, [%%g0] %0\n\t"
1307 : "i" (ASI_ESTATE_ERROR_EN),
1308 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1311 /* Decide if we can continue after handling this trap and
1312 * logging the error.
1315 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1318 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1319 * error was logged while we had error reporting traps disabled.
1321 if (cheetah_recheck_errors(&local_snapshot)) {
1322 unsigned long new_afsr = local_snapshot.afsr;
1324 /* If we got a new asynchronous error, die... */
1325 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1326 CHAFSR_WDU | CHAFSR_CPU |
1327 CHAFSR_IVU | CHAFSR_UE |
1328 CHAFSR_BERR | CHAFSR_TO))
1333 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1336 panic("Irrecoverable Fast-ECC error trap.\n");
1338 /* Flush E-cache to kick the error trap handlers out. */
1339 cheetah_flush_ecache();
1342 /* Try to fix a correctable error by pushing the line out from
1343 * the E-cache. Recheck error reporting registers to see if the
1344 * problem is intermittent.
1346 static int cheetah_fix_ce(unsigned long physaddr)
1348 unsigned long orig_estate;
1349 unsigned long alias1, alias2;
1352 /* Make sure correctable error traps are disabled. */
1353 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1354 "andn %0, %1, %%g1\n\t"
1355 "stxa %%g1, [%%g0] %2\n\t"
1357 : "=&r" (orig_estate)
1358 : "i" (ESTATE_ERROR_CEEN),
1359 "i" (ASI_ESTATE_ERROR_EN)
1362 /* We calculate alias addresses that will force the
1363 * cache line in question out of the E-cache. Then
1364 * we bring it back in with an atomic instruction so
1365 * that we get it in some modified/exclusive state,
1366 * then we displace it again to try and get proper ECC
1367 * pushed back into the system.
1369 physaddr &= ~(8UL - 1UL);
1370 alias1 = (ecache_flush_physbase +
1371 (physaddr & ((ecache_flush_size >> 1) - 1)));
1372 alias2 = alias1 + (ecache_flush_size >> 1);
1373 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1374 "ldxa [%1] %3, %%g0\n\t"
1375 "casxa [%2] %3, %%g0, %%g0\n\t"
1376 "membar #StoreLoad | #StoreStore\n\t"
1377 "ldxa [%0] %3, %%g0\n\t"
1378 "ldxa [%1] %3, %%g0\n\t"
1381 : "r" (alias1), "r" (alias2),
1382 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1384 /* Did that trigger another error? */
1385 if (cheetah_recheck_errors(NULL)) {
1386 /* Try one more time. */
1387 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1389 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1390 if (cheetah_recheck_errors(NULL))
1395 /* No new error, intermittent problem. */
1399 /* Restore error enables. */
1400 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1402 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1407 /* Return non-zero if PADDR is a valid physical memory address. */
1408 static int cheetah_check_main_memory(unsigned long paddr)
1410 unsigned long vaddr = PAGE_OFFSET + paddr;
1412 if (vaddr > (unsigned long) high_memory)
1415 return kern_addr_valid(vaddr);
1418 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1420 struct cheetah_err_info local_snapshot, *p;
1421 int recoverable, is_memory;
1423 p = cheetah_get_error_log(afsr);
1425 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1427 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1428 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1432 /* Grab snapshot of logged error. */
1433 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1435 /* If the current trap snapshot does not match what the
1436 * trap handler passed along into our args, big trouble.
1437 * In such a case, mark the local copy as invalid.
1439 * Else, it matches and we mark the afsr in the non-local
1440 * copy as invalid so we may log new error traps there.
1442 if (p->afsr != afsr || p->afar != afar)
1443 local_snapshot.afsr = CHAFSR_INVALID;
1445 p->afsr = CHAFSR_INVALID;
1447 is_memory = cheetah_check_main_memory(afar);
1449 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1450 /* XXX Might want to log the results of this operation
1451 * XXX somewhere... -DaveM
1453 cheetah_fix_ce(afar);
1457 int flush_all, flush_line;
1459 flush_all = flush_line = 0;
1460 if ((afsr & CHAFSR_EDC) != 0UL) {
1461 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1465 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1466 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1472 /* Trap handler only disabled I-cache, flush it. */
1473 cheetah_flush_icache();
1475 /* Re-enable I-cache */
1476 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1477 "or %%g1, %1, %%g1\n\t"
1478 "stxa %%g1, [%%g0] %0\n\t"
1481 : "i" (ASI_DCU_CONTROL_REG),
1486 cheetah_flush_ecache();
1487 else if (flush_line)
1488 cheetah_flush_ecache_line(afar);
1491 /* Re-enable error reporting */
1492 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1493 "or %%g1, %1, %%g1\n\t"
1494 "stxa %%g1, [%%g0] %0\n\t"
1497 : "i" (ASI_ESTATE_ERROR_EN),
1498 "i" (ESTATE_ERROR_CEEN)
1501 /* Decide if we can continue after handling this trap and
1502 * logging the error.
1505 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1508 /* Re-check AFSR/AFAR */
1509 (void) cheetah_recheck_errors(&local_snapshot);
1512 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1515 panic("Irrecoverable Correctable-ECC error trap.\n");
1518 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1520 struct cheetah_err_info local_snapshot, *p;
1521 int recoverable, is_memory;
1524 /* Check for the special PCI poke sequence. */
1525 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1526 cheetah_flush_icache();
1527 cheetah_flush_dcache();
1529 /* Re-enable I-cache/D-cache */
1530 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1531 "or %%g1, %1, %%g1\n\t"
1532 "stxa %%g1, [%%g0] %0\n\t"
1535 : "i" (ASI_DCU_CONTROL_REG),
1536 "i" (DCU_DC | DCU_IC)
1539 /* Re-enable error reporting */
1540 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1541 "or %%g1, %1, %%g1\n\t"
1542 "stxa %%g1, [%%g0] %0\n\t"
1545 : "i" (ASI_ESTATE_ERROR_EN),
1546 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1549 (void) cheetah_recheck_errors(NULL);
1551 pci_poke_faulted = 1;
1553 regs->tnpc = regs->tpc + 4;
1558 p = cheetah_get_error_log(afsr);
1560 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1562 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1563 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1567 /* Grab snapshot of logged error. */
1568 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1570 /* If the current trap snapshot does not match what the
1571 * trap handler passed along into our args, big trouble.
1572 * In such a case, mark the local copy as invalid.
1574 * Else, it matches and we mark the afsr in the non-local
1575 * copy as invalid so we may log new error traps there.
1577 if (p->afsr != afsr || p->afar != afar)
1578 local_snapshot.afsr = CHAFSR_INVALID;
1580 p->afsr = CHAFSR_INVALID;
1582 is_memory = cheetah_check_main_memory(afar);
1585 int flush_all, flush_line;
1587 flush_all = flush_line = 0;
1588 if ((afsr & CHAFSR_EDU) != 0UL) {
1589 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1593 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1594 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1600 cheetah_flush_icache();
1601 cheetah_flush_dcache();
1603 /* Re-enable I/D caches */
1604 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1605 "or %%g1, %1, %%g1\n\t"
1606 "stxa %%g1, [%%g0] %0\n\t"
1609 : "i" (ASI_DCU_CONTROL_REG),
1610 "i" (DCU_IC | DCU_DC)
1614 cheetah_flush_ecache();
1615 else if (flush_line)
1616 cheetah_flush_ecache_line(afar);
1619 /* Re-enable error reporting */
1620 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1621 "or %%g1, %1, %%g1\n\t"
1622 "stxa %%g1, [%%g0] %0\n\t"
1625 : "i" (ASI_ESTATE_ERROR_EN),
1626 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1629 /* Decide if we can continue after handling this trap and
1630 * logging the error.
1633 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1636 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1637 * error was logged while we had error reporting traps disabled.
1639 if (cheetah_recheck_errors(&local_snapshot)) {
1640 unsigned long new_afsr = local_snapshot.afsr;
1642 /* If we got a new asynchronous error, die... */
1643 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1644 CHAFSR_WDU | CHAFSR_CPU |
1645 CHAFSR_IVU | CHAFSR_UE |
1646 CHAFSR_BERR | CHAFSR_TO))
1651 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1653 /* "Recoverable" here means we try to yank the page from ever
1654 * being newly used again. This depends upon a few things:
1655 * 1) Must be main memory, and AFAR must be valid.
1656 * 2) If we trapped from user, OK.
1657 * 3) Else, if we trapped from kernel we must find exception
1658 * table entry (ie. we have to have been accessing user
1661 * If AFAR is not in main memory, or we trapped from kernel
1662 * and cannot find an exception table entry, it is unacceptable
1663 * to try and continue.
1665 if (recoverable && is_memory) {
1666 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1667 /* OK, usermode access. */
1670 const struct exception_table_entry *entry;
1672 entry = search_exception_tables(regs->tpc);
1674 /* OK, kernel access to userspace. */
1678 /* BAD, privileged state is corrupted. */
1683 if (pfn_valid(afar >> PAGE_SHIFT))
1684 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1688 /* Only perform fixup if we still have a
1689 * recoverable condition.
1692 regs->tpc = entry->fixup;
1693 regs->tnpc = regs->tpc + 4;
1702 panic("Irrecoverable deferred error trap.\n");
1705 /* Handle a D/I cache parity error trap. TYPE is encoded as:
1707 * Bit0: 0=dcache,1=icache
1708 * Bit1: 0=recoverable,1=unrecoverable
1710 * The hardware has disabled both the I-cache and D-cache in
1711 * the %dcr register.
1713 void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1716 __cheetah_flush_icache();
1718 cheetah_plus_zap_dcache_parity();
1719 cheetah_flush_dcache();
1721 /* Re-enable I-cache/D-cache */
1722 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1723 "or %%g1, %1, %%g1\n\t"
1724 "stxa %%g1, [%%g0] %0\n\t"
1727 : "i" (ASI_DCU_CONTROL_REG),
1728 "i" (DCU_DC | DCU_IC)
1732 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1734 (type & 0x1) ? 'I' : 'D',
1736 print_symbol(KERN_EMERG "TPC<%s>\n", regs->tpc);
1737 panic("Irrecoverable Cheetah+ parity error.");
1740 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1742 (type & 0x1) ? 'I' : 'D',
1744 print_symbol(KERN_WARNING "TPC<%s>\n", regs->tpc);
1747 struct sun4v_error_entry {
1752 #define SUN4V_ERR_TYPE_UNDEFINED 0
1753 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1754 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1755 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1756 #define SUN4V_ERR_TYPE_WARNING_RES 4
1759 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1760 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1761 #define SUN4V_ERR_ATTRS_PIO 0x00000004
1762 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1763 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1764 #define SUN4V_ERR_ATTRS_USER_MODE 0x01000000
1765 #define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000
1766 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1774 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1775 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1777 static const char *sun4v_err_type_to_str(u32 type)
1780 case SUN4V_ERR_TYPE_UNDEFINED:
1782 case SUN4V_ERR_TYPE_UNCORRECTED_RES:
1783 return "uncorrected resumable";
1784 case SUN4V_ERR_TYPE_PRECISE_NONRES:
1785 return "precise nonresumable";
1786 case SUN4V_ERR_TYPE_DEFERRED_NONRES:
1787 return "deferred nonresumable";
1788 case SUN4V_ERR_TYPE_WARNING_RES:
1789 return "warning resumable";
1795 extern void __show_regs(struct pt_regs * regs);
1797 static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
1801 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1802 printk("%s: err_handle[%lx] err_stick[%lx] err_type[%08x:%s]\n",
1804 ent->err_handle, ent->err_stick,
1806 sun4v_err_type_to_str(ent->err_type));
1807 printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n",
1810 ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ?
1812 ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ?
1814 ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ?
1816 ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ?
1817 "integer-regs" : ""),
1818 ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ?
1820 ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ?
1822 ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ?
1824 ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ?
1825 "queue-full" : ""));
1826 printk("%s: err_raddr[%016lx] err_size[%u] err_cpu[%u]\n",
1828 ent->err_raddr, ent->err_size, ent->err_cpu);
1832 if ((cnt = atomic_read(ocnt)) != 0) {
1833 atomic_set(ocnt, 0);
1835 printk("%s: Queue overflowed %d times.\n",
1840 /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate.
1841 * Log the event and clear the first word of the entry.
1843 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
1845 struct sun4v_error_entry *ent, local_copy;
1846 struct trap_per_cpu *tb;
1847 unsigned long paddr;
1852 tb = &trap_block[cpu];
1853 paddr = tb->resum_kernel_buf_pa + offset;
1856 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1858 /* We have a local copy now, so release the entry. */
1859 ent->err_handle = 0;
1864 if (ent->err_type == SUN4V_ERR_TYPE_WARNING_RES) {
1865 /* If err_type is 0x4, it's a powerdown request. Do
1866 * not do the usual resumable error log because that
1867 * makes it look like some abnormal error.
1869 printk(KERN_INFO "Power down request...\n");
1870 kill_cad_pid(SIGINT, 1);
1874 sun4v_log_error(regs, &local_copy, cpu,
1875 KERN_ERR "RESUMABLE ERROR",
1876 &sun4v_resum_oflow_cnt);
1879 /* If we try to printk() we'll probably make matters worse, by trying
1880 * to retake locks this cpu already holds or causing more errors. So
1881 * just bump a counter, and we'll report these counter bumps above.
1883 void sun4v_resum_overflow(struct pt_regs *regs)
1885 atomic_inc(&sun4v_resum_oflow_cnt);
1888 /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate.
1889 * Log the event, clear the first word of the entry, and die.
1891 void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
1893 struct sun4v_error_entry *ent, local_copy;
1894 struct trap_per_cpu *tb;
1895 unsigned long paddr;
1900 tb = &trap_block[cpu];
1901 paddr = tb->nonresum_kernel_buf_pa + offset;
1904 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1906 /* We have a local copy now, so release the entry. */
1907 ent->err_handle = 0;
1913 /* Check for the special PCI poke sequence. */
1914 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
1915 pci_poke_faulted = 1;
1917 regs->tnpc = regs->tpc + 4;
1922 sun4v_log_error(regs, &local_copy, cpu,
1923 KERN_EMERG "NON-RESUMABLE ERROR",
1924 &sun4v_nonresum_oflow_cnt);
1926 panic("Non-resumable error.");
1929 /* If we try to printk() we'll probably make matters worse, by trying
1930 * to retake locks this cpu already holds or causing more errors. So
1931 * just bump a counter, and we'll report these counter bumps above.
1933 void sun4v_nonresum_overflow(struct pt_regs *regs)
1935 /* XXX Actually even this can make not that much sense. Perhaps
1936 * XXX we should just pull the plug and panic directly from here?
1938 atomic_inc(&sun4v_nonresum_oflow_cnt);
1941 unsigned long sun4v_err_itlb_vaddr;
1942 unsigned long sun4v_err_itlb_ctx;
1943 unsigned long sun4v_err_itlb_pte;
1944 unsigned long sun4v_err_itlb_error;
1946 void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
1949 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1951 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
1953 print_symbol(KERN_EMERG "SUN4V-ITLB: TPC<%s>\n", regs->tpc);
1954 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
1955 "pte[%lx] error[%lx]\n",
1956 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
1957 sun4v_err_itlb_pte, sun4v_err_itlb_error);
1962 unsigned long sun4v_err_dtlb_vaddr;
1963 unsigned long sun4v_err_dtlb_ctx;
1964 unsigned long sun4v_err_dtlb_pte;
1965 unsigned long sun4v_err_dtlb_error;
1967 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
1970 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1972 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
1974 print_symbol(KERN_EMERG "SUN4V-DTLB: TPC<%s>\n", regs->tpc);
1975 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
1976 "pte[%lx] error[%lx]\n",
1977 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
1978 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
1983 void hypervisor_tlbop_error(unsigned long err, unsigned long op)
1985 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
1989 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
1991 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
1995 void do_fpe_common(struct pt_regs *regs)
1997 if (regs->tstate & TSTATE_PRIV) {
1998 regs->tpc = regs->tnpc;
2001 unsigned long fsr = current_thread_info()->xfsr[0];
2004 if (test_thread_flag(TIF_32BIT)) {
2005 regs->tpc &= 0xffffffff;
2006 regs->tnpc &= 0xffffffff;
2008 info.si_signo = SIGFPE;
2010 info.si_addr = (void __user *)regs->tpc;
2012 info.si_code = __SI_FAULT;
2013 if ((fsr & 0x1c000) == (1 << 14)) {
2015 info.si_code = FPE_FLTINV;
2016 else if (fsr & 0x08)
2017 info.si_code = FPE_FLTOVF;
2018 else if (fsr & 0x04)
2019 info.si_code = FPE_FLTUND;
2020 else if (fsr & 0x02)
2021 info.si_code = FPE_FLTDIV;
2022 else if (fsr & 0x01)
2023 info.si_code = FPE_FLTRES;
2025 force_sig_info(SIGFPE, &info, current);
2029 void do_fpieee(struct pt_regs *regs)
2031 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2032 0, 0x24, SIGFPE) == NOTIFY_STOP)
2035 do_fpe_common(regs);
2038 extern int do_mathemu(struct pt_regs *, struct fpustate *);
2040 void do_fpother(struct pt_regs *regs)
2042 struct fpustate *f = FPUSTATE;
2045 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2046 0, 0x25, SIGFPE) == NOTIFY_STOP)
2049 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2050 case (2 << 14): /* unfinished_FPop */
2051 case (3 << 14): /* unimplemented_FPop */
2052 ret = do_mathemu(regs, f);
2057 do_fpe_common(regs);
2060 void do_tof(struct pt_regs *regs)
2064 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2065 0, 0x26, SIGEMT) == NOTIFY_STOP)
2068 if (regs->tstate & TSTATE_PRIV)
2069 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2070 if (test_thread_flag(TIF_32BIT)) {
2071 regs->tpc &= 0xffffffff;
2072 regs->tnpc &= 0xffffffff;
2074 info.si_signo = SIGEMT;
2076 info.si_code = EMT_TAGOVF;
2077 info.si_addr = (void __user *)regs->tpc;
2079 force_sig_info(SIGEMT, &info, current);
2082 void do_div0(struct pt_regs *regs)
2086 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2087 0, 0x28, SIGFPE) == NOTIFY_STOP)
2090 if (regs->tstate & TSTATE_PRIV)
2091 die_if_kernel("TL0: Kernel divide by zero.", regs);
2092 if (test_thread_flag(TIF_32BIT)) {
2093 regs->tpc &= 0xffffffff;
2094 regs->tnpc &= 0xffffffff;
2096 info.si_signo = SIGFPE;
2098 info.si_code = FPE_INTDIV;
2099 info.si_addr = (void __user *)regs->tpc;
2101 force_sig_info(SIGFPE, &info, current);
2104 void instruction_dump (unsigned int *pc)
2108 if ((((unsigned long) pc) & 3))
2111 printk("Instruction DUMP:");
2112 for (i = -3; i < 6; i++)
2113 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2117 static void user_instruction_dump (unsigned int __user *pc)
2120 unsigned int buf[9];
2122 if ((((unsigned long) pc) & 3))
2125 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2128 printk("Instruction DUMP:");
2129 for (i = 0; i < 9; i++)
2130 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2134 void show_stack(struct task_struct *tsk, unsigned long *_ksp)
2136 unsigned long pc, fp, thread_base, ksp;
2137 struct thread_info *tp;
2138 struct reg_window *rw;
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:");
2158 #ifdef CONFIG_KALLSYMS
2162 /* Bogus frame pointer? */
2163 if (fp < (thread_base + sizeof(struct thread_info)) ||
2164 fp >= (thread_base + THREAD_SIZE))
2166 rw = (struct reg_window *)fp;
2168 printk(" [%016lx] ", pc);
2169 print_symbol("%s\n", pc);
2170 fp = rw->ins[6] + STACK_BIAS;
2171 } while (++count < 16);
2172 #ifndef CONFIG_KALLSYMS
2177 void dump_stack(void)
2179 show_stack(current, NULL);
2182 EXPORT_SYMBOL(dump_stack);
2184 static inline int is_kernel_stack(struct task_struct *task,
2185 struct reg_window *rw)
2187 unsigned long rw_addr = (unsigned long) rw;
2188 unsigned long thread_base, thread_end;
2190 if (rw_addr < PAGE_OFFSET) {
2191 if (task != &init_task)
2195 thread_base = (unsigned long) task_stack_page(task);
2196 thread_end = thread_base + sizeof(union thread_union);
2197 if (rw_addr >= thread_base &&
2198 rw_addr < thread_end &&
2205 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2207 unsigned long fp = rw->ins[6];
2212 return (struct reg_window *) (fp + STACK_BIAS);
2215 void die_if_kernel(char *str, struct pt_regs *regs)
2217 static int die_counter;
2218 extern void smp_report_regs(void);
2221 /* Amuse the user. */
2224 " \"@'/ .. \\`@\"\n"
2228 printk("%s(%d): %s [#%d]\n", current->comm, current->pid, str, ++die_counter);
2229 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2230 __asm__ __volatile__("flushw");
2232 add_taint(TAINT_DIE);
2233 if (regs->tstate & TSTATE_PRIV) {
2234 struct reg_window *rw = (struct reg_window *)
2235 (regs->u_regs[UREG_FP] + STACK_BIAS);
2237 /* Stop the back trace when we hit userland or we
2238 * find some badly aligned kernel stack.
2242 is_kernel_stack(current, rw)) {
2243 printk("Caller[%016lx]", rw->ins[7]);
2244 print_symbol(": %s", rw->ins[7]);
2247 rw = kernel_stack_up(rw);
2249 instruction_dump ((unsigned int *) regs->tpc);
2251 if (test_thread_flag(TIF_32BIT)) {
2252 regs->tpc &= 0xffffffff;
2253 regs->tnpc &= 0xffffffff;
2255 user_instruction_dump ((unsigned int __user *) regs->tpc);
2262 if (regs->tstate & TSTATE_PRIV)
2267 #define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2268 #define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2270 extern int handle_popc(u32 insn, struct pt_regs *regs);
2271 extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
2272 extern int vis_emul(struct pt_regs *, unsigned int);
2274 void do_illegal_instruction(struct pt_regs *regs)
2276 unsigned long pc = regs->tpc;
2277 unsigned long tstate = regs->tstate;
2281 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2282 0, 0x10, SIGILL) == NOTIFY_STOP)
2285 if (tstate & TSTATE_PRIV)
2286 die_if_kernel("Kernel illegal instruction", regs);
2287 if (test_thread_flag(TIF_32BIT))
2289 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2290 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2291 if (handle_popc(insn, regs))
2293 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2294 if (handle_ldf_stq(insn, regs))
2296 } else if (tlb_type == hypervisor) {
2297 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2298 if (!vis_emul(regs, insn))
2301 struct fpustate *f = FPUSTATE;
2303 /* XXX maybe verify XFSR bits like
2304 * XXX do_fpother() does?
2306 if (do_mathemu(regs, f))
2311 info.si_signo = SIGILL;
2313 info.si_code = ILL_ILLOPC;
2314 info.si_addr = (void __user *)pc;
2316 force_sig_info(SIGILL, &info, current);
2319 extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
2321 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2325 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2326 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2329 if (regs->tstate & TSTATE_PRIV) {
2330 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2333 info.si_signo = SIGBUS;
2335 info.si_code = BUS_ADRALN;
2336 info.si_addr = (void __user *)sfar;
2338 force_sig_info(SIGBUS, &info, current);
2341 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2345 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2346 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2349 if (regs->tstate & TSTATE_PRIV) {
2350 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2353 info.si_signo = SIGBUS;
2355 info.si_code = BUS_ADRALN;
2356 info.si_addr = (void __user *) addr;
2358 force_sig_info(SIGBUS, &info, current);
2361 void do_privop(struct pt_regs *regs)
2365 if (notify_die(DIE_TRAP, "privileged operation", regs,
2366 0, 0x11, SIGILL) == NOTIFY_STOP)
2369 if (test_thread_flag(TIF_32BIT)) {
2370 regs->tpc &= 0xffffffff;
2371 regs->tnpc &= 0xffffffff;
2373 info.si_signo = SIGILL;
2375 info.si_code = ILL_PRVOPC;
2376 info.si_addr = (void __user *)regs->tpc;
2378 force_sig_info(SIGILL, &info, current);
2381 void do_privact(struct pt_regs *regs)
2386 /* Trap level 1 stuff or other traps we should never see... */
2387 void do_cee(struct pt_regs *regs)
2389 die_if_kernel("TL0: Cache Error Exception", regs);
2392 void do_cee_tl1(struct pt_regs *regs)
2394 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2395 die_if_kernel("TL1: Cache Error Exception", regs);
2398 void do_dae_tl1(struct pt_regs *regs)
2400 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2401 die_if_kernel("TL1: Data Access Exception", regs);
2404 void do_iae_tl1(struct pt_regs *regs)
2406 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2407 die_if_kernel("TL1: Instruction Access Exception", regs);
2410 void do_div0_tl1(struct pt_regs *regs)
2412 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2413 die_if_kernel("TL1: DIV0 Exception", regs);
2416 void do_fpdis_tl1(struct pt_regs *regs)
2418 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2419 die_if_kernel("TL1: FPU Disabled", regs);
2422 void do_fpieee_tl1(struct pt_regs *regs)
2424 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2425 die_if_kernel("TL1: FPU IEEE Exception", regs);
2428 void do_fpother_tl1(struct pt_regs *regs)
2430 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2431 die_if_kernel("TL1: FPU Other Exception", regs);
2434 void do_ill_tl1(struct pt_regs *regs)
2436 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2437 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2440 void do_irq_tl1(struct pt_regs *regs)
2442 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2443 die_if_kernel("TL1: IRQ Exception", regs);
2446 void do_lddfmna_tl1(struct pt_regs *regs)
2448 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2449 die_if_kernel("TL1: LDDF Exception", regs);
2452 void do_stdfmna_tl1(struct pt_regs *regs)
2454 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2455 die_if_kernel("TL1: STDF Exception", regs);
2458 void do_paw(struct pt_regs *regs)
2460 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2463 void do_paw_tl1(struct pt_regs *regs)
2465 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2466 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2469 void do_vaw(struct pt_regs *regs)
2471 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2474 void do_vaw_tl1(struct pt_regs *regs)
2476 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2477 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2480 void do_tof_tl1(struct pt_regs *regs)
2482 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2483 die_if_kernel("TL1: Tag Overflow Exception", regs);
2486 void do_getpsr(struct pt_regs *regs)
2488 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2489 regs->tpc = regs->tnpc;
2491 if (test_thread_flag(TIF_32BIT)) {
2492 regs->tpc &= 0xffffffff;
2493 regs->tnpc &= 0xffffffff;
2497 struct trap_per_cpu trap_block[NR_CPUS];
2499 /* This can get invoked before sched_init() so play it super safe
2500 * and use hard_smp_processor_id().
2502 void init_cur_cpu_trap(struct thread_info *t)
2504 int cpu = hard_smp_processor_id();
2505 struct trap_per_cpu *p = &trap_block[cpu];
2511 extern void thread_info_offsets_are_bolixed_dave(void);
2512 extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2513 extern void tsb_config_offsets_are_bolixed_dave(void);
2515 /* Only invoked on boot processor. */
2516 void __init trap_init(void)
2518 /* Compile time sanity check. */
2519 if (TI_TASK != offsetof(struct thread_info, task) ||
2520 TI_FLAGS != offsetof(struct thread_info, flags) ||
2521 TI_CPU != offsetof(struct thread_info, cpu) ||
2522 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2523 TI_KSP != offsetof(struct thread_info, ksp) ||
2524 TI_FAULT_ADDR != offsetof(struct thread_info, fault_address) ||
2525 TI_KREGS != offsetof(struct thread_info, kregs) ||
2526 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2527 TI_EXEC_DOMAIN != offsetof(struct thread_info, exec_domain) ||
2528 TI_REG_WINDOW != offsetof(struct thread_info, reg_window) ||
2529 TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) ||
2530 TI_GSR != offsetof(struct thread_info, gsr) ||
2531 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2532 TI_USER_CNTD0 != offsetof(struct thread_info, user_cntd0) ||
2533 TI_USER_CNTD1 != offsetof(struct thread_info, user_cntd1) ||
2534 TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) ||
2535 TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) ||
2536 TI_PCR != offsetof(struct thread_info, pcr_reg) ||
2537 TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) ||
2538 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2539 TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) ||
2540 TI_RESTART_BLOCK != offsetof(struct thread_info, restart_block) ||
2541 TI_KUNA_REGS != offsetof(struct thread_info, kern_una_regs) ||
2542 TI_KUNA_INSN != offsetof(struct thread_info, kern_una_insn) ||
2543 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2544 (TI_FPREGS & (64 - 1)))
2545 thread_info_offsets_are_bolixed_dave();
2547 if (TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, thread) ||
2548 (TRAP_PER_CPU_PGD_PADDR !=
2549 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2550 (TRAP_PER_CPU_CPU_MONDO_PA !=
2551 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2552 (TRAP_PER_CPU_DEV_MONDO_PA !=
2553 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2554 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2555 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2556 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2557 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2558 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2559 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2560 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2561 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2562 (TRAP_PER_CPU_FAULT_INFO !=
2563 offsetof(struct trap_per_cpu, fault_info)) ||
2564 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2565 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2566 (TRAP_PER_CPU_CPU_LIST_PA !=
2567 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2568 (TRAP_PER_CPU_TSB_HUGE !=
2569 offsetof(struct trap_per_cpu, tsb_huge)) ||
2570 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2571 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2572 (TRAP_PER_CPU_IRQ_WORKLIST !=
2573 offsetof(struct trap_per_cpu, irq_worklist)) ||
2574 (TRAP_PER_CPU_CPU_MONDO_QMASK !=
2575 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) ||
2576 (TRAP_PER_CPU_DEV_MONDO_QMASK !=
2577 offsetof(struct trap_per_cpu, dev_mondo_qmask)) ||
2578 (TRAP_PER_CPU_RESUM_QMASK !=
2579 offsetof(struct trap_per_cpu, resum_qmask)) ||
2580 (TRAP_PER_CPU_NONRESUM_QMASK !=
2581 offsetof(struct trap_per_cpu, nonresum_qmask)))
2582 trap_per_cpu_offsets_are_bolixed_dave();
2584 if ((TSB_CONFIG_TSB !=
2585 offsetof(struct tsb_config, tsb)) ||
2586 (TSB_CONFIG_RSS_LIMIT !=
2587 offsetof(struct tsb_config, tsb_rss_limit)) ||
2588 (TSB_CONFIG_NENTRIES !=
2589 offsetof(struct tsb_config, tsb_nentries)) ||
2590 (TSB_CONFIG_REG_VAL !=
2591 offsetof(struct tsb_config, tsb_reg_val)) ||
2592 (TSB_CONFIG_MAP_VADDR !=
2593 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2594 (TSB_CONFIG_MAP_PTE !=
2595 offsetof(struct tsb_config, tsb_map_pte)))
2596 tsb_config_offsets_are_bolixed_dave();
2598 /* Attach to the address space of init_task. On SMP we
2599 * do this in smp.c:smp_callin for other cpus.
2601 atomic_inc(&init_mm.mm_count);
2602 current->active_mm = &init_mm;