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>
18 #include <linux/smp_lock.h>
20 #include <linux/init.h>
22 #include <asm/delay.h>
23 #include <asm/system.h>
24 #include <asm/ptrace.h>
25 #include <asm/oplib.h>
27 #include <asm/pgtable.h>
28 #include <asm/unistd.h>
29 #include <asm/uaccess.h>
30 #include <asm/fpumacro.h>
33 #include <asm/estate.h>
34 #include <asm/chafsr.h>
35 #include <asm/sfafsr.h>
36 #include <asm/psrcompat.h>
37 #include <asm/processor.h>
38 #include <asm/timer.h>
39 #include <asm/kdebug.h>
42 #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);
90 print_symbol("TRAPLOG: TPC<%s>\n", p->trapstack[i].tpc);
94 void do_call_debug(struct pt_regs *regs)
96 notify_die(DIE_CALL, "debug call", regs, 0, 255, SIGINT);
99 void bad_trap(struct pt_regs *regs, long lvl)
104 if (notify_die(DIE_TRAP, "bad trap", regs,
105 0, lvl, SIGTRAP) == NOTIFY_STOP)
109 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
110 die_if_kernel(buffer, regs);
114 if (regs->tstate & TSTATE_PRIV) {
115 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
116 die_if_kernel(buffer, regs);
118 if (test_thread_flag(TIF_32BIT)) {
119 regs->tpc &= 0xffffffff;
120 regs->tnpc &= 0xffffffff;
122 info.si_signo = SIGILL;
124 info.si_code = ILL_ILLTRP;
125 info.si_addr = (void __user *)regs->tpc;
126 info.si_trapno = lvl;
127 force_sig_info(SIGILL, &info, current);
130 void bad_trap_tl1(struct pt_regs *regs, long lvl)
134 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
135 0, lvl, SIGTRAP) == NOTIFY_STOP)
138 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
140 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
141 die_if_kernel (buffer, regs);
144 #ifdef CONFIG_DEBUG_BUGVERBOSE
145 void do_BUG(const char *file, int line)
148 printk("kernel BUG at %s:%d!\n", file, line);
152 void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
156 if (notify_die(DIE_TRAP, "instruction access exception", regs,
157 0, 0x8, SIGTRAP) == NOTIFY_STOP)
160 if (regs->tstate & TSTATE_PRIV) {
161 printk("spitfire_insn_access_exception: SFSR[%016lx] "
162 "SFAR[%016lx], going.\n", sfsr, sfar);
163 die_if_kernel("Iax", regs);
165 if (test_thread_flag(TIF_32BIT)) {
166 regs->tpc &= 0xffffffff;
167 regs->tnpc &= 0xffffffff;
169 info.si_signo = SIGSEGV;
171 info.si_code = SEGV_MAPERR;
172 info.si_addr = (void __user *)regs->tpc;
174 force_sig_info(SIGSEGV, &info, current);
177 void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
179 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
180 0, 0x8, SIGTRAP) == NOTIFY_STOP)
183 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
184 spitfire_insn_access_exception(regs, sfsr, sfar);
187 void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
189 unsigned short type = (type_ctx >> 16);
190 unsigned short ctx = (type_ctx & 0xffff);
193 if (notify_die(DIE_TRAP, "instruction access exception", regs,
194 0, 0x8, SIGTRAP) == NOTIFY_STOP)
197 if (regs->tstate & TSTATE_PRIV) {
198 printk("sun4v_insn_access_exception: ADDR[%016lx] "
199 "CTX[%04x] TYPE[%04x], going.\n",
201 die_if_kernel("Iax", regs);
204 if (test_thread_flag(TIF_32BIT)) {
205 regs->tpc &= 0xffffffff;
206 regs->tnpc &= 0xffffffff;
208 info.si_signo = SIGSEGV;
210 info.si_code = SEGV_MAPERR;
211 info.si_addr = (void __user *) addr;
213 force_sig_info(SIGSEGV, &info, current);
216 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
218 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
219 0, 0x8, SIGTRAP) == NOTIFY_STOP)
222 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
223 sun4v_insn_access_exception(regs, addr, type_ctx);
226 void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
230 if (notify_die(DIE_TRAP, "data access exception", regs,
231 0, 0x30, SIGTRAP) == NOTIFY_STOP)
234 if (regs->tstate & TSTATE_PRIV) {
235 /* Test if this comes from uaccess places. */
236 const struct exception_table_entry *entry;
238 entry = search_exception_tables(regs->tpc);
240 /* Ouch, somebody is trying VM hole tricks on us... */
241 #ifdef DEBUG_EXCEPTIONS
242 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
243 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
244 regs->tpc, entry->fixup);
246 regs->tpc = entry->fixup;
247 regs->tnpc = regs->tpc + 4;
251 printk("spitfire_data_access_exception: SFSR[%016lx] "
252 "SFAR[%016lx], going.\n", sfsr, sfar);
253 die_if_kernel("Dax", regs);
256 info.si_signo = SIGSEGV;
258 info.si_code = SEGV_MAPERR;
259 info.si_addr = (void __user *)sfar;
261 force_sig_info(SIGSEGV, &info, current);
264 void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
266 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
267 0, 0x30, SIGTRAP) == NOTIFY_STOP)
270 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
271 spitfire_data_access_exception(regs, sfsr, sfar);
274 void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
276 unsigned short type = (type_ctx >> 16);
277 unsigned short ctx = (type_ctx & 0xffff);
280 if (notify_die(DIE_TRAP, "data access exception", regs,
281 0, 0x8, SIGTRAP) == NOTIFY_STOP)
284 if (regs->tstate & TSTATE_PRIV) {
285 printk("sun4v_data_access_exception: ADDR[%016lx] "
286 "CTX[%04x] TYPE[%04x], going.\n",
288 die_if_kernel("Dax", regs);
291 if (test_thread_flag(TIF_32BIT)) {
292 regs->tpc &= 0xffffffff;
293 regs->tnpc &= 0xffffffff;
295 info.si_signo = SIGSEGV;
297 info.si_code = SEGV_MAPERR;
298 info.si_addr = (void __user *) addr;
300 force_sig_info(SIGSEGV, &info, current);
303 void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
305 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
306 0, 0x8, SIGTRAP) == NOTIFY_STOP)
309 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
310 sun4v_data_access_exception(regs, addr, type_ctx);
314 /* This is really pathetic... */
315 extern volatile int pci_poke_in_progress;
316 extern volatile int pci_poke_cpu;
317 extern volatile int pci_poke_faulted;
320 /* When access exceptions happen, we must do this. */
321 static void spitfire_clean_and_reenable_l1_caches(void)
325 if (tlb_type != spitfire)
329 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
330 spitfire_put_icache_tag(va, 0x0);
331 spitfire_put_dcache_tag(va, 0x0);
334 /* Re-enable in LSU. */
335 __asm__ __volatile__("flush %%g6\n\t"
337 "stxa %0, [%%g0] %1\n\t"
340 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
341 LSU_CONTROL_IM | LSU_CONTROL_DM),
342 "i" (ASI_LSU_CONTROL)
346 static void spitfire_enable_estate_errors(void)
348 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
351 : "r" (ESTATE_ERR_ALL),
352 "i" (ASI_ESTATE_ERROR_EN));
355 static char ecc_syndrome_table[] = {
356 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
357 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
358 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
359 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
360 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
361 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
362 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
363 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
364 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
365 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
366 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
367 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
368 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
369 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
370 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
371 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
372 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
373 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
374 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
375 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
376 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
377 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
378 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
379 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
380 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
381 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
382 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
383 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
384 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
385 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
386 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
387 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
390 static char *syndrome_unknown = "<Unknown>";
392 static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
394 unsigned short scode;
395 char memmod_str[64], *p;
398 scode = ecc_syndrome_table[udbl & 0xff];
399 if (prom_getunumber(scode, afar,
400 memmod_str, sizeof(memmod_str)) == -1)
401 p = syndrome_unknown;
404 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
405 "Memory Module \"%s\"\n",
406 smp_processor_id(), scode, p);
410 scode = ecc_syndrome_table[udbh & 0xff];
411 if (prom_getunumber(scode, afar,
412 memmod_str, sizeof(memmod_str)) == -1)
413 p = syndrome_unknown;
416 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
417 "Memory Module \"%s\"\n",
418 smp_processor_id(), scode, p);
423 static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
426 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
427 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
428 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
430 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
432 /* We always log it, even if someone is listening for this
435 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
436 0, TRAP_TYPE_CEE, SIGTRAP);
438 /* The Correctable ECC Error trap does not disable I/D caches. So
439 * we only have to restore the ESTATE Error Enable register.
441 spitfire_enable_estate_errors();
444 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)
448 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
449 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
450 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
452 /* XXX add more human friendly logging of the error status
453 * XXX as is implemented for cheetah
456 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
458 /* We always log it, even if someone is listening for this
461 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
464 if (regs->tstate & TSTATE_PRIV) {
466 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
467 die_if_kernel("UE", regs);
470 /* XXX need more intelligent processing here, such as is implemented
471 * XXX for cheetah errors, in fact if the E-cache still holds the
472 * XXX line with bad parity this will loop
475 spitfire_clean_and_reenable_l1_caches();
476 spitfire_enable_estate_errors();
478 if (test_thread_flag(TIF_32BIT)) {
479 regs->tpc &= 0xffffffff;
480 regs->tnpc &= 0xffffffff;
482 info.si_signo = SIGBUS;
484 info.si_code = BUS_OBJERR;
485 info.si_addr = (void *)0;
487 force_sig_info(SIGBUS, &info, current);
490 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
492 unsigned long afsr, tt, udbh, udbl;
495 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
496 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
497 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
498 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
499 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
502 if (tt == TRAP_TYPE_DAE &&
503 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
504 spitfire_clean_and_reenable_l1_caches();
505 spitfire_enable_estate_errors();
507 pci_poke_faulted = 1;
508 regs->tnpc = regs->tpc + 4;
513 if (afsr & SFAFSR_UE)
514 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
516 if (tt == TRAP_TYPE_CEE) {
517 /* Handle the case where we took a CEE trap, but ACK'd
518 * only the UE state in the UDB error registers.
520 if (afsr & SFAFSR_UE) {
521 if (udbh & UDBE_CE) {
522 __asm__ __volatile__(
523 "stxa %0, [%1] %2\n\t"
526 : "r" (udbh & UDBE_CE),
527 "r" (0x0), "i" (ASI_UDB_ERROR_W));
529 if (udbl & UDBE_CE) {
530 __asm__ __volatile__(
531 "stxa %0, [%1] %2\n\t"
534 : "r" (udbl & UDBE_CE),
535 "r" (0x18), "i" (ASI_UDB_ERROR_W));
539 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
543 int cheetah_pcache_forced_on;
545 void cheetah_enable_pcache(void)
549 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
552 __asm__ __volatile__("ldxa [%%g0] %1, %0"
554 : "i" (ASI_DCU_CONTROL_REG));
555 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
556 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
559 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
562 /* Cheetah error trap handling. */
563 static unsigned long ecache_flush_physbase;
564 static unsigned long ecache_flush_linesize;
565 static unsigned long ecache_flush_size;
567 /* WARNING: The error trap handlers in assembly know the precise
568 * layout of the following structure.
570 * C-level handlers below use this information to log the error
571 * and then determine how to recover (if possible).
573 struct cheetah_err_info {
578 /*0x10*/u64 dcache_data[4]; /* The actual data */
579 /*0x30*/u64 dcache_index; /* D-cache index */
580 /*0x38*/u64 dcache_tag; /* D-cache tag/valid */
581 /*0x40*/u64 dcache_utag; /* D-cache microtag */
582 /*0x48*/u64 dcache_stag; /* D-cache snooptag */
585 /*0x50*/u64 icache_data[8]; /* The actual insns + predecode */
586 /*0x90*/u64 icache_index; /* I-cache index */
587 /*0x98*/u64 icache_tag; /* I-cache phys tag */
588 /*0xa0*/u64 icache_utag; /* I-cache microtag */
589 /*0xa8*/u64 icache_stag; /* I-cache snooptag */
590 /*0xb0*/u64 icache_upper; /* I-cache upper-tag */
591 /*0xb8*/u64 icache_lower; /* I-cache lower-tag */
594 /*0xc0*/u64 ecache_data[4]; /* 32 bytes from staging registers */
595 /*0xe0*/u64 ecache_index; /* E-cache index */
596 /*0xe8*/u64 ecache_tag; /* E-cache tag/state */
598 /*0xf0*/u64 __pad[32 - 30];
600 #define CHAFSR_INVALID ((u64)-1L)
602 /* This table is ordered in priority of errors and matches the
603 * AFAR overwrite policy as well.
606 struct afsr_error_table {
611 static const char CHAFSR_PERR_msg[] =
612 "System interface protocol error";
613 static const char CHAFSR_IERR_msg[] =
614 "Internal processor error";
615 static const char CHAFSR_ISAP_msg[] =
616 "System request parity error on incoming addresss";
617 static const char CHAFSR_UCU_msg[] =
618 "Uncorrectable E-cache ECC error for ifetch/data";
619 static const char CHAFSR_UCC_msg[] =
620 "SW Correctable E-cache ECC error for ifetch/data";
621 static const char CHAFSR_UE_msg[] =
622 "Uncorrectable system bus data ECC error for read";
623 static const char CHAFSR_EDU_msg[] =
624 "Uncorrectable E-cache ECC error for stmerge/blkld";
625 static const char CHAFSR_EMU_msg[] =
626 "Uncorrectable system bus MTAG error";
627 static const char CHAFSR_WDU_msg[] =
628 "Uncorrectable E-cache ECC error for writeback";
629 static const char CHAFSR_CPU_msg[] =
630 "Uncorrectable ECC error for copyout";
631 static const char CHAFSR_CE_msg[] =
632 "HW corrected system bus data ECC error for read";
633 static const char CHAFSR_EDC_msg[] =
634 "HW corrected E-cache ECC error for stmerge/blkld";
635 static const char CHAFSR_EMC_msg[] =
636 "HW corrected system bus MTAG ECC error";
637 static const char CHAFSR_WDC_msg[] =
638 "HW corrected E-cache ECC error for writeback";
639 static const char CHAFSR_CPC_msg[] =
640 "HW corrected ECC error for copyout";
641 static const char CHAFSR_TO_msg[] =
642 "Unmapped error from system bus";
643 static const char CHAFSR_BERR_msg[] =
644 "Bus error response from system bus";
645 static const char CHAFSR_IVC_msg[] =
646 "HW corrected system bus data ECC error for ivec read";
647 static const char CHAFSR_IVU_msg[] =
648 "Uncorrectable system bus data ECC error for ivec read";
649 static struct afsr_error_table __cheetah_error_table[] = {
650 { CHAFSR_PERR, CHAFSR_PERR_msg },
651 { CHAFSR_IERR, CHAFSR_IERR_msg },
652 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
653 { CHAFSR_UCU, CHAFSR_UCU_msg },
654 { CHAFSR_UCC, CHAFSR_UCC_msg },
655 { CHAFSR_UE, CHAFSR_UE_msg },
656 { CHAFSR_EDU, CHAFSR_EDU_msg },
657 { CHAFSR_EMU, CHAFSR_EMU_msg },
658 { CHAFSR_WDU, CHAFSR_WDU_msg },
659 { CHAFSR_CPU, CHAFSR_CPU_msg },
660 { CHAFSR_CE, CHAFSR_CE_msg },
661 { CHAFSR_EDC, CHAFSR_EDC_msg },
662 { CHAFSR_EMC, CHAFSR_EMC_msg },
663 { CHAFSR_WDC, CHAFSR_WDC_msg },
664 { CHAFSR_CPC, CHAFSR_CPC_msg },
665 { CHAFSR_TO, CHAFSR_TO_msg },
666 { CHAFSR_BERR, CHAFSR_BERR_msg },
667 /* These two do not update the AFAR. */
668 { CHAFSR_IVC, CHAFSR_IVC_msg },
669 { CHAFSR_IVU, CHAFSR_IVU_msg },
672 static const char CHPAFSR_DTO_msg[] =
673 "System bus unmapped error for prefetch/storequeue-read";
674 static const char CHPAFSR_DBERR_msg[] =
675 "System bus error for prefetch/storequeue-read";
676 static const char CHPAFSR_THCE_msg[] =
677 "Hardware corrected E-cache Tag ECC error";
678 static const char CHPAFSR_TSCE_msg[] =
679 "SW handled correctable E-cache Tag ECC error";
680 static const char CHPAFSR_TUE_msg[] =
681 "Uncorrectable E-cache Tag ECC error";
682 static const char CHPAFSR_DUE_msg[] =
683 "System bus uncorrectable data ECC error due to prefetch/store-fill";
684 static struct afsr_error_table __cheetah_plus_error_table[] = {
685 { CHAFSR_PERR, CHAFSR_PERR_msg },
686 { CHAFSR_IERR, CHAFSR_IERR_msg },
687 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
688 { CHAFSR_UCU, CHAFSR_UCU_msg },
689 { CHAFSR_UCC, CHAFSR_UCC_msg },
690 { CHAFSR_UE, CHAFSR_UE_msg },
691 { CHAFSR_EDU, CHAFSR_EDU_msg },
692 { CHAFSR_EMU, CHAFSR_EMU_msg },
693 { CHAFSR_WDU, CHAFSR_WDU_msg },
694 { CHAFSR_CPU, CHAFSR_CPU_msg },
695 { CHAFSR_CE, CHAFSR_CE_msg },
696 { CHAFSR_EDC, CHAFSR_EDC_msg },
697 { CHAFSR_EMC, CHAFSR_EMC_msg },
698 { CHAFSR_WDC, CHAFSR_WDC_msg },
699 { CHAFSR_CPC, CHAFSR_CPC_msg },
700 { CHAFSR_TO, CHAFSR_TO_msg },
701 { CHAFSR_BERR, CHAFSR_BERR_msg },
702 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
703 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
704 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
705 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
706 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
707 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
708 /* These two do not update the AFAR. */
709 { CHAFSR_IVC, CHAFSR_IVC_msg },
710 { CHAFSR_IVU, CHAFSR_IVU_msg },
713 static const char JPAFSR_JETO_msg[] =
714 "System interface protocol error, hw timeout caused";
715 static const char JPAFSR_SCE_msg[] =
716 "Parity error on system snoop results";
717 static const char JPAFSR_JEIC_msg[] =
718 "System interface protocol error, illegal command detected";
719 static const char JPAFSR_JEIT_msg[] =
720 "System interface protocol error, illegal ADTYPE detected";
721 static const char JPAFSR_OM_msg[] =
722 "Out of range memory error has occurred";
723 static const char JPAFSR_ETP_msg[] =
724 "Parity error on L2 cache tag SRAM";
725 static const char JPAFSR_UMS_msg[] =
726 "Error due to unsupported store";
727 static const char JPAFSR_RUE_msg[] =
728 "Uncorrectable ECC error from remote cache/memory";
729 static const char JPAFSR_RCE_msg[] =
730 "Correctable ECC error from remote cache/memory";
731 static const char JPAFSR_BP_msg[] =
732 "JBUS parity error on returned read data";
733 static const char JPAFSR_WBP_msg[] =
734 "JBUS parity error on data for writeback or block store";
735 static const char JPAFSR_FRC_msg[] =
736 "Foreign read to DRAM incurring correctable ECC error";
737 static const char JPAFSR_FRU_msg[] =
738 "Foreign read to DRAM incurring uncorrectable ECC error";
739 static struct afsr_error_table __jalapeno_error_table[] = {
740 { JPAFSR_JETO, JPAFSR_JETO_msg },
741 { JPAFSR_SCE, JPAFSR_SCE_msg },
742 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
743 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
744 { CHAFSR_PERR, CHAFSR_PERR_msg },
745 { CHAFSR_IERR, CHAFSR_IERR_msg },
746 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
747 { CHAFSR_UCU, CHAFSR_UCU_msg },
748 { CHAFSR_UCC, CHAFSR_UCC_msg },
749 { CHAFSR_UE, CHAFSR_UE_msg },
750 { CHAFSR_EDU, CHAFSR_EDU_msg },
751 { JPAFSR_OM, JPAFSR_OM_msg },
752 { CHAFSR_WDU, CHAFSR_WDU_msg },
753 { CHAFSR_CPU, CHAFSR_CPU_msg },
754 { CHAFSR_CE, CHAFSR_CE_msg },
755 { CHAFSR_EDC, CHAFSR_EDC_msg },
756 { JPAFSR_ETP, JPAFSR_ETP_msg },
757 { CHAFSR_WDC, CHAFSR_WDC_msg },
758 { CHAFSR_CPC, CHAFSR_CPC_msg },
759 { CHAFSR_TO, CHAFSR_TO_msg },
760 { CHAFSR_BERR, CHAFSR_BERR_msg },
761 { JPAFSR_UMS, JPAFSR_UMS_msg },
762 { JPAFSR_RUE, JPAFSR_RUE_msg },
763 { JPAFSR_RCE, JPAFSR_RCE_msg },
764 { JPAFSR_BP, JPAFSR_BP_msg },
765 { JPAFSR_WBP, JPAFSR_WBP_msg },
766 { JPAFSR_FRC, JPAFSR_FRC_msg },
767 { JPAFSR_FRU, JPAFSR_FRU_msg },
768 /* These two do not update the AFAR. */
769 { CHAFSR_IVU, CHAFSR_IVU_msg },
772 static struct afsr_error_table *cheetah_error_table;
773 static unsigned long cheetah_afsr_errors;
775 /* This is allocated at boot time based upon the largest hardware
776 * cpu ID in the system. We allocate two entries per cpu, one for
777 * TL==0 logging and one for TL >= 1 logging.
779 struct cheetah_err_info *cheetah_error_log;
781 static __inline__ struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
783 struct cheetah_err_info *p;
784 int cpu = smp_processor_id();
786 if (!cheetah_error_log)
789 p = cheetah_error_log + (cpu * 2);
790 if ((afsr & CHAFSR_TL1) != 0UL)
796 extern unsigned int tl0_icpe[], tl1_icpe[];
797 extern unsigned int tl0_dcpe[], tl1_dcpe[];
798 extern unsigned int tl0_fecc[], tl1_fecc[];
799 extern unsigned int tl0_cee[], tl1_cee[];
800 extern unsigned int tl0_iae[], tl1_iae[];
801 extern unsigned int tl0_dae[], tl1_dae[];
802 extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
803 extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
804 extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
805 extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
806 extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
808 void __init cheetah_ecache_flush_init(void)
810 unsigned long largest_size, smallest_linesize, order, ver;
811 struct device_node *dp;
814 /* Scan all cpu device tree nodes, note two values:
815 * 1) largest E-cache size
816 * 2) smallest E-cache line size
819 smallest_linesize = ~0UL;
822 while (!cpu_find_by_instance(instance, &dp, NULL)) {
825 val = of_getintprop_default(dp, "ecache-size",
827 if (val > largest_size)
829 val = of_getintprop_default(dp, "ecache-line-size", 64);
830 if (val < smallest_linesize)
831 smallest_linesize = val;
835 if (largest_size == 0UL || smallest_linesize == ~0UL) {
836 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
841 ecache_flush_size = (2 * largest_size);
842 ecache_flush_linesize = smallest_linesize;
844 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
846 if (ecache_flush_physbase == ~0UL) {
847 prom_printf("cheetah_ecache_flush_init: Cannot find %d byte "
848 "contiguous physical memory.\n",
853 /* Now allocate error trap reporting scoreboard. */
854 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
855 for (order = 0; order < MAX_ORDER; order++) {
856 if ((PAGE_SIZE << order) >= sz)
859 cheetah_error_log = (struct cheetah_err_info *)
860 __get_free_pages(GFP_KERNEL, order);
861 if (!cheetah_error_log) {
862 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
863 "error logging scoreboard (%d bytes).\n", sz);
866 memset(cheetah_error_log, 0, PAGE_SIZE << order);
868 /* Mark all AFSRs as invalid so that the trap handler will
869 * log new new information there.
871 for (i = 0; i < 2 * NR_CPUS; i++)
872 cheetah_error_log[i].afsr = CHAFSR_INVALID;
874 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
875 if ((ver >> 32) == __JALAPENO_ID ||
876 (ver >> 32) == __SERRANO_ID) {
877 cheetah_error_table = &__jalapeno_error_table[0];
878 cheetah_afsr_errors = JPAFSR_ERRORS;
879 } else if ((ver >> 32) == 0x003e0015) {
880 cheetah_error_table = &__cheetah_plus_error_table[0];
881 cheetah_afsr_errors = CHPAFSR_ERRORS;
883 cheetah_error_table = &__cheetah_error_table[0];
884 cheetah_afsr_errors = CHAFSR_ERRORS;
887 /* Now patch trap tables. */
888 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
889 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
890 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
891 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
892 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
893 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
894 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
895 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
896 if (tlb_type == cheetah_plus) {
897 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
898 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
899 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
900 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
905 static void cheetah_flush_ecache(void)
907 unsigned long flush_base = ecache_flush_physbase;
908 unsigned long flush_linesize = ecache_flush_linesize;
909 unsigned long flush_size = ecache_flush_size;
911 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
912 " bne,pt %%xcc, 1b\n\t"
913 " ldxa [%2 + %0] %3, %%g0\n\t"
915 : "0" (flush_size), "r" (flush_base),
916 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
919 static void cheetah_flush_ecache_line(unsigned long physaddr)
923 physaddr &= ~(8UL - 1UL);
924 physaddr = (ecache_flush_physbase +
925 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
926 alias = physaddr + (ecache_flush_size >> 1UL);
927 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
928 "ldxa [%1] %2, %%g0\n\t"
931 : "r" (physaddr), "r" (alias),
932 "i" (ASI_PHYS_USE_EC));
935 /* Unfortunately, the diagnostic access to the I-cache tags we need to
936 * use to clear the thing interferes with I-cache coherency transactions.
938 * So we must only flush the I-cache when it is disabled.
940 static void __cheetah_flush_icache(void)
942 unsigned int icache_size, icache_line_size;
945 icache_size = local_cpu_data().icache_size;
946 icache_line_size = local_cpu_data().icache_line_size;
948 /* Clear the valid bits in all the tags. */
949 for (addr = 0; addr < icache_size; addr += icache_line_size) {
950 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
953 : "r" (addr | (2 << 3)),
958 static void cheetah_flush_icache(void)
960 unsigned long dcu_save;
962 /* Save current DCU, disable I-cache. */
963 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
964 "or %0, %2, %%g1\n\t"
965 "stxa %%g1, [%%g0] %1\n\t"
968 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
971 __cheetah_flush_icache();
973 /* Restore DCU register */
974 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
977 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
980 static void cheetah_flush_dcache(void)
982 unsigned int dcache_size, dcache_line_size;
985 dcache_size = local_cpu_data().dcache_size;
986 dcache_line_size = local_cpu_data().dcache_line_size;
988 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
989 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
992 : "r" (addr), "i" (ASI_DCACHE_TAG));
996 /* In order to make the even parity correct we must do two things.
997 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
998 * Next, we clear out all 32-bytes of data for that line. Data of
999 * all-zero + tag parity value of zero == correct parity.
1001 static void cheetah_plus_zap_dcache_parity(void)
1003 unsigned int dcache_size, dcache_line_size;
1006 dcache_size = local_cpu_data().dcache_size;
1007 dcache_line_size = local_cpu_data().dcache_line_size;
1009 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1010 unsigned long tag = (addr >> 14);
1013 __asm__ __volatile__("membar #Sync\n\t"
1014 "stxa %0, [%1] %2\n\t"
1017 : "r" (tag), "r" (addr),
1018 "i" (ASI_DCACHE_UTAG));
1019 for (line = addr; line < addr + dcache_line_size; line += 8)
1020 __asm__ __volatile__("membar #Sync\n\t"
1021 "stxa %%g0, [%0] %1\n\t"
1025 "i" (ASI_DCACHE_DATA));
1029 /* Conversion tables used to frob Cheetah AFSR syndrome values into
1030 * something palatable to the memory controller driver get_unumber
1054 static unsigned char cheetah_ecc_syntab[] = {
1055 /*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1056 /*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1057 /*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1058 /*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1059 /*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1060 /*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1061 /*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1062 /*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1063 /*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1064 /*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1065 /*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1066 /*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1067 /*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1068 /*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1069 /*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1070 /*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1071 /*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1072 /*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1073 /*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1074 /*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1075 /*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1076 /*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1077 /*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1078 /*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1079 /*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1080 /*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1081 /*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1082 /*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1083 /*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1084 /*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1085 /*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1086 /*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1088 static unsigned char cheetah_mtag_syntab[] = {
1099 /* Return the highest priority error conditon mentioned. */
1100 static __inline__ unsigned long cheetah_get_hipri(unsigned long afsr)
1102 unsigned long tmp = 0;
1105 for (i = 0; cheetah_error_table[i].mask; i++) {
1106 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1112 static const char *cheetah_get_string(unsigned long bit)
1116 for (i = 0; cheetah_error_table[i].mask; i++) {
1117 if ((bit & cheetah_error_table[i].mask) != 0UL)
1118 return cheetah_error_table[i].name;
1123 extern int chmc_getunumber(int, unsigned long, char *, int);
1125 static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1126 unsigned long afsr, unsigned long afar, int recoverable)
1128 unsigned long hipri;
1131 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1132 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1134 (afsr & CHAFSR_TL1) ? 1 : 0);
1135 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1136 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1137 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1138 printk("%s" "ERROR(%d): ",
1139 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1140 print_symbol("TPC<%s>\n", regs->tpc);
1141 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1142 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1143 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1144 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1145 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1146 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1147 hipri = cheetah_get_hipri(afsr);
1148 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1149 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1150 hipri, cheetah_get_string(hipri));
1152 /* Try to get unumber if relevant. */
1153 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1154 CHAFSR_CPC | CHAFSR_CPU | \
1155 CHAFSR_UE | CHAFSR_CE | \
1156 CHAFSR_EDC | CHAFSR_EDU | \
1157 CHAFSR_UCC | CHAFSR_UCU | \
1158 CHAFSR_WDU | CHAFSR_WDC)
1159 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1160 if (afsr & ESYND_ERRORS) {
1164 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1165 syndrome = cheetah_ecc_syntab[syndrome];
1166 ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum));
1168 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1169 (recoverable ? KERN_WARNING : KERN_CRIT),
1170 smp_processor_id(), unum);
1171 } else if (afsr & MSYND_ERRORS) {
1175 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1176 syndrome = cheetah_mtag_syntab[syndrome];
1177 ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum));
1179 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1180 (recoverable ? KERN_WARNING : KERN_CRIT),
1181 smp_processor_id(), unum);
1184 /* Now dump the cache snapshots. */
1185 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx]\n",
1186 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1187 (int) info->dcache_index,
1191 printk("%s" "ERROR(%d): D-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1192 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1193 info->dcache_data[0],
1194 info->dcache_data[1],
1195 info->dcache_data[2],
1196 info->dcache_data[3]);
1197 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx] "
1198 "u[%016lx] l[%016lx]\n",
1199 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1200 (int) info->icache_index,
1205 info->icache_lower);
1206 printk("%s" "ERROR(%d): I-cache INSN0[%016lx] INSN1[%016lx] INSN2[%016lx] INSN3[%016lx]\n",
1207 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1208 info->icache_data[0],
1209 info->icache_data[1],
1210 info->icache_data[2],
1211 info->icache_data[3]);
1212 printk("%s" "ERROR(%d): I-cache INSN4[%016lx] INSN5[%016lx] INSN6[%016lx] INSN7[%016lx]\n",
1213 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1214 info->icache_data[4],
1215 info->icache_data[5],
1216 info->icache_data[6],
1217 info->icache_data[7]);
1218 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016lx]\n",
1219 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1220 (int) info->ecache_index, info->ecache_tag);
1221 printk("%s" "ERROR(%d): E-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1222 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1223 info->ecache_data[0],
1224 info->ecache_data[1],
1225 info->ecache_data[2],
1226 info->ecache_data[3]);
1228 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1229 while (afsr != 0UL) {
1230 unsigned long bit = cheetah_get_hipri(afsr);
1232 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1233 (recoverable ? KERN_WARNING : KERN_CRIT),
1234 bit, cheetah_get_string(bit));
1240 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1243 static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1245 unsigned long afsr, afar;
1248 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1251 if ((afsr & cheetah_afsr_errors) != 0) {
1253 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1261 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1263 : : "r" (afsr), "i" (ASI_AFSR));
1268 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1270 struct cheetah_err_info local_snapshot, *p;
1274 cheetah_flush_ecache();
1276 p = cheetah_get_error_log(afsr);
1278 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1280 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1281 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1285 /* Grab snapshot of logged error. */
1286 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1288 /* If the current trap snapshot does not match what the
1289 * trap handler passed along into our args, big trouble.
1290 * In such a case, mark the local copy as invalid.
1292 * Else, it matches and we mark the afsr in the non-local
1293 * copy as invalid so we may log new error traps there.
1295 if (p->afsr != afsr || p->afar != afar)
1296 local_snapshot.afsr = CHAFSR_INVALID;
1298 p->afsr = CHAFSR_INVALID;
1300 cheetah_flush_icache();
1301 cheetah_flush_dcache();
1303 /* Re-enable I-cache/D-cache */
1304 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1305 "or %%g1, %1, %%g1\n\t"
1306 "stxa %%g1, [%%g0] %0\n\t"
1309 : "i" (ASI_DCU_CONTROL_REG),
1310 "i" (DCU_DC | DCU_IC)
1313 /* Re-enable error reporting */
1314 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1315 "or %%g1, %1, %%g1\n\t"
1316 "stxa %%g1, [%%g0] %0\n\t"
1319 : "i" (ASI_ESTATE_ERROR_EN),
1320 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1323 /* Decide if we can continue after handling this trap and
1324 * logging the error.
1327 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1330 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1331 * error was logged while we had error reporting traps disabled.
1333 if (cheetah_recheck_errors(&local_snapshot)) {
1334 unsigned long new_afsr = local_snapshot.afsr;
1336 /* If we got a new asynchronous error, die... */
1337 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1338 CHAFSR_WDU | CHAFSR_CPU |
1339 CHAFSR_IVU | CHAFSR_UE |
1340 CHAFSR_BERR | CHAFSR_TO))
1345 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1348 panic("Irrecoverable Fast-ECC error trap.\n");
1350 /* Flush E-cache to kick the error trap handlers out. */
1351 cheetah_flush_ecache();
1354 /* Try to fix a correctable error by pushing the line out from
1355 * the E-cache. Recheck error reporting registers to see if the
1356 * problem is intermittent.
1358 static int cheetah_fix_ce(unsigned long physaddr)
1360 unsigned long orig_estate;
1361 unsigned long alias1, alias2;
1364 /* Make sure correctable error traps are disabled. */
1365 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1366 "andn %0, %1, %%g1\n\t"
1367 "stxa %%g1, [%%g0] %2\n\t"
1369 : "=&r" (orig_estate)
1370 : "i" (ESTATE_ERROR_CEEN),
1371 "i" (ASI_ESTATE_ERROR_EN)
1374 /* We calculate alias addresses that will force the
1375 * cache line in question out of the E-cache. Then
1376 * we bring it back in with an atomic instruction so
1377 * that we get it in some modified/exclusive state,
1378 * then we displace it again to try and get proper ECC
1379 * pushed back into the system.
1381 physaddr &= ~(8UL - 1UL);
1382 alias1 = (ecache_flush_physbase +
1383 (physaddr & ((ecache_flush_size >> 1) - 1)));
1384 alias2 = alias1 + (ecache_flush_size >> 1);
1385 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1386 "ldxa [%1] %3, %%g0\n\t"
1387 "casxa [%2] %3, %%g0, %%g0\n\t"
1388 "membar #StoreLoad | #StoreStore\n\t"
1389 "ldxa [%0] %3, %%g0\n\t"
1390 "ldxa [%1] %3, %%g0\n\t"
1393 : "r" (alias1), "r" (alias2),
1394 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1396 /* Did that trigger another error? */
1397 if (cheetah_recheck_errors(NULL)) {
1398 /* Try one more time. */
1399 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1401 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1402 if (cheetah_recheck_errors(NULL))
1407 /* No new error, intermittent problem. */
1411 /* Restore error enables. */
1412 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1414 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1419 /* Return non-zero if PADDR is a valid physical memory address. */
1420 static int cheetah_check_main_memory(unsigned long paddr)
1422 unsigned long vaddr = PAGE_OFFSET + paddr;
1424 if (vaddr > (unsigned long) high_memory)
1427 return kern_addr_valid(vaddr);
1430 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1432 struct cheetah_err_info local_snapshot, *p;
1433 int recoverable, is_memory;
1435 p = cheetah_get_error_log(afsr);
1437 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1439 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1440 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1444 /* Grab snapshot of logged error. */
1445 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1447 /* If the current trap snapshot does not match what the
1448 * trap handler passed along into our args, big trouble.
1449 * In such a case, mark the local copy as invalid.
1451 * Else, it matches and we mark the afsr in the non-local
1452 * copy as invalid so we may log new error traps there.
1454 if (p->afsr != afsr || p->afar != afar)
1455 local_snapshot.afsr = CHAFSR_INVALID;
1457 p->afsr = CHAFSR_INVALID;
1459 is_memory = cheetah_check_main_memory(afar);
1461 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1462 /* XXX Might want to log the results of this operation
1463 * XXX somewhere... -DaveM
1465 cheetah_fix_ce(afar);
1469 int flush_all, flush_line;
1471 flush_all = flush_line = 0;
1472 if ((afsr & CHAFSR_EDC) != 0UL) {
1473 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1477 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1478 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1484 /* Trap handler only disabled I-cache, flush it. */
1485 cheetah_flush_icache();
1487 /* Re-enable I-cache */
1488 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1489 "or %%g1, %1, %%g1\n\t"
1490 "stxa %%g1, [%%g0] %0\n\t"
1493 : "i" (ASI_DCU_CONTROL_REG),
1498 cheetah_flush_ecache();
1499 else if (flush_line)
1500 cheetah_flush_ecache_line(afar);
1503 /* Re-enable error reporting */
1504 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1505 "or %%g1, %1, %%g1\n\t"
1506 "stxa %%g1, [%%g0] %0\n\t"
1509 : "i" (ASI_ESTATE_ERROR_EN),
1510 "i" (ESTATE_ERROR_CEEN)
1513 /* Decide if we can continue after handling this trap and
1514 * logging the error.
1517 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1520 /* Re-check AFSR/AFAR */
1521 (void) cheetah_recheck_errors(&local_snapshot);
1524 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1527 panic("Irrecoverable Correctable-ECC error trap.\n");
1530 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1532 struct cheetah_err_info local_snapshot, *p;
1533 int recoverable, is_memory;
1536 /* Check for the special PCI poke sequence. */
1537 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1538 cheetah_flush_icache();
1539 cheetah_flush_dcache();
1541 /* Re-enable I-cache/D-cache */
1542 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1543 "or %%g1, %1, %%g1\n\t"
1544 "stxa %%g1, [%%g0] %0\n\t"
1547 : "i" (ASI_DCU_CONTROL_REG),
1548 "i" (DCU_DC | DCU_IC)
1551 /* Re-enable error reporting */
1552 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1553 "or %%g1, %1, %%g1\n\t"
1554 "stxa %%g1, [%%g0] %0\n\t"
1557 : "i" (ASI_ESTATE_ERROR_EN),
1558 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1561 (void) cheetah_recheck_errors(NULL);
1563 pci_poke_faulted = 1;
1565 regs->tnpc = regs->tpc + 4;
1570 p = cheetah_get_error_log(afsr);
1572 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1574 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1575 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1579 /* Grab snapshot of logged error. */
1580 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1582 /* If the current trap snapshot does not match what the
1583 * trap handler passed along into our args, big trouble.
1584 * In such a case, mark the local copy as invalid.
1586 * Else, it matches and we mark the afsr in the non-local
1587 * copy as invalid so we may log new error traps there.
1589 if (p->afsr != afsr || p->afar != afar)
1590 local_snapshot.afsr = CHAFSR_INVALID;
1592 p->afsr = CHAFSR_INVALID;
1594 is_memory = cheetah_check_main_memory(afar);
1597 int flush_all, flush_line;
1599 flush_all = flush_line = 0;
1600 if ((afsr & CHAFSR_EDU) != 0UL) {
1601 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1605 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1606 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1612 cheetah_flush_icache();
1613 cheetah_flush_dcache();
1615 /* Re-enable I/D caches */
1616 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1617 "or %%g1, %1, %%g1\n\t"
1618 "stxa %%g1, [%%g0] %0\n\t"
1621 : "i" (ASI_DCU_CONTROL_REG),
1622 "i" (DCU_IC | DCU_DC)
1626 cheetah_flush_ecache();
1627 else if (flush_line)
1628 cheetah_flush_ecache_line(afar);
1631 /* Re-enable error reporting */
1632 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1633 "or %%g1, %1, %%g1\n\t"
1634 "stxa %%g1, [%%g0] %0\n\t"
1637 : "i" (ASI_ESTATE_ERROR_EN),
1638 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1641 /* Decide if we can continue after handling this trap and
1642 * logging the error.
1645 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1648 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1649 * error was logged while we had error reporting traps disabled.
1651 if (cheetah_recheck_errors(&local_snapshot)) {
1652 unsigned long new_afsr = local_snapshot.afsr;
1654 /* If we got a new asynchronous error, die... */
1655 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1656 CHAFSR_WDU | CHAFSR_CPU |
1657 CHAFSR_IVU | CHAFSR_UE |
1658 CHAFSR_BERR | CHAFSR_TO))
1663 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1665 /* "Recoverable" here means we try to yank the page from ever
1666 * being newly used again. This depends upon a few things:
1667 * 1) Must be main memory, and AFAR must be valid.
1668 * 2) If we trapped from user, OK.
1669 * 3) Else, if we trapped from kernel we must find exception
1670 * table entry (ie. we have to have been accessing user
1673 * If AFAR is not in main memory, or we trapped from kernel
1674 * and cannot find an exception table entry, it is unacceptable
1675 * to try and continue.
1677 if (recoverable && is_memory) {
1678 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1679 /* OK, usermode access. */
1682 const struct exception_table_entry *entry;
1684 entry = search_exception_tables(regs->tpc);
1686 /* OK, kernel access to userspace. */
1690 /* BAD, privileged state is corrupted. */
1695 if (pfn_valid(afar >> PAGE_SHIFT))
1696 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1700 /* Only perform fixup if we still have a
1701 * recoverable condition.
1704 regs->tpc = entry->fixup;
1705 regs->tnpc = regs->tpc + 4;
1714 panic("Irrecoverable deferred error trap.\n");
1717 /* Handle a D/I cache parity error trap. TYPE is encoded as:
1719 * Bit0: 0=dcache,1=icache
1720 * Bit1: 0=recoverable,1=unrecoverable
1722 * The hardware has disabled both the I-cache and D-cache in
1723 * the %dcr register.
1725 void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1728 __cheetah_flush_icache();
1730 cheetah_plus_zap_dcache_parity();
1731 cheetah_flush_dcache();
1733 /* Re-enable I-cache/D-cache */
1734 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1735 "or %%g1, %1, %%g1\n\t"
1736 "stxa %%g1, [%%g0] %0\n\t"
1739 : "i" (ASI_DCU_CONTROL_REG),
1740 "i" (DCU_DC | DCU_IC)
1744 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1746 (type & 0x1) ? 'I' : 'D',
1748 print_symbol(KERN_EMERG "TPC<%s>\n", regs->tpc);
1749 panic("Irrecoverable Cheetah+ parity error.");
1752 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1754 (type & 0x1) ? 'I' : 'D',
1756 print_symbol(KERN_WARNING "TPC<%s>\n", regs->tpc);
1759 struct sun4v_error_entry {
1764 #define SUN4V_ERR_TYPE_UNDEFINED 0
1765 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1766 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1767 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1768 #define SUN4V_ERR_TYPE_WARNING_RES 4
1771 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1772 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1773 #define SUN4V_ERR_ATTRS_PIO 0x00000004
1774 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1775 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1776 #define SUN4V_ERR_ATTRS_USER_MODE 0x01000000
1777 #define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000
1778 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1786 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1787 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1789 static const char *sun4v_err_type_to_str(u32 type)
1792 case SUN4V_ERR_TYPE_UNDEFINED:
1794 case SUN4V_ERR_TYPE_UNCORRECTED_RES:
1795 return "uncorrected resumable";
1796 case SUN4V_ERR_TYPE_PRECISE_NONRES:
1797 return "precise nonresumable";
1798 case SUN4V_ERR_TYPE_DEFERRED_NONRES:
1799 return "deferred nonresumable";
1800 case SUN4V_ERR_TYPE_WARNING_RES:
1801 return "warning resumable";
1807 extern void __show_regs(struct pt_regs * regs);
1809 static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
1813 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1814 printk("%s: err_handle[%lx] err_stick[%lx] err_type[%08x:%s]\n",
1816 ent->err_handle, ent->err_stick,
1818 sun4v_err_type_to_str(ent->err_type));
1819 printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n",
1822 ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ?
1824 ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ?
1826 ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ?
1828 ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ?
1829 "integer-regs" : ""),
1830 ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ?
1832 ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ?
1834 ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ?
1836 ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ?
1837 "queue-full" : ""));
1838 printk("%s: err_raddr[%016lx] err_size[%u] err_cpu[%u]\n",
1840 ent->err_raddr, ent->err_size, ent->err_cpu);
1844 if ((cnt = atomic_read(ocnt)) != 0) {
1845 atomic_set(ocnt, 0);
1847 printk("%s: Queue overflowed %d times.\n",
1852 /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate.
1853 * Log the event and clear the first word of the entry.
1855 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
1857 struct sun4v_error_entry *ent, local_copy;
1858 struct trap_per_cpu *tb;
1859 unsigned long paddr;
1864 tb = &trap_block[cpu];
1865 paddr = tb->resum_kernel_buf_pa + offset;
1868 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1870 /* We have a local copy now, so release the entry. */
1871 ent->err_handle = 0;
1876 if (ent->err_type == SUN4V_ERR_TYPE_WARNING_RES) {
1877 /* If err_type is 0x4, it's a powerdown request. Do
1878 * not do the usual resumable error log because that
1879 * makes it look like some abnormal error.
1881 printk(KERN_INFO "Power down request...\n");
1882 kill_cad_pid(SIGINT, 1);
1886 sun4v_log_error(regs, &local_copy, cpu,
1887 KERN_ERR "RESUMABLE ERROR",
1888 &sun4v_resum_oflow_cnt);
1891 /* If we try to printk() we'll probably make matters worse, by trying
1892 * to retake locks this cpu already holds or causing more errors. So
1893 * just bump a counter, and we'll report these counter bumps above.
1895 void sun4v_resum_overflow(struct pt_regs *regs)
1897 atomic_inc(&sun4v_resum_oflow_cnt);
1900 /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate.
1901 * Log the event, clear the first word of the entry, and die.
1903 void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
1905 struct sun4v_error_entry *ent, local_copy;
1906 struct trap_per_cpu *tb;
1907 unsigned long paddr;
1912 tb = &trap_block[cpu];
1913 paddr = tb->nonresum_kernel_buf_pa + offset;
1916 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1918 /* We have a local copy now, so release the entry. */
1919 ent->err_handle = 0;
1925 /* Check for the special PCI poke sequence. */
1926 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
1927 pci_poke_faulted = 1;
1929 regs->tnpc = regs->tpc + 4;
1934 sun4v_log_error(regs, &local_copy, cpu,
1935 KERN_EMERG "NON-RESUMABLE ERROR",
1936 &sun4v_nonresum_oflow_cnt);
1938 panic("Non-resumable error.");
1941 /* If we try to printk() we'll probably make matters worse, by trying
1942 * to retake locks this cpu already holds or causing more errors. So
1943 * just bump a counter, and we'll report these counter bumps above.
1945 void sun4v_nonresum_overflow(struct pt_regs *regs)
1947 /* XXX Actually even this can make not that much sense. Perhaps
1948 * XXX we should just pull the plug and panic directly from here?
1950 atomic_inc(&sun4v_nonresum_oflow_cnt);
1953 unsigned long sun4v_err_itlb_vaddr;
1954 unsigned long sun4v_err_itlb_ctx;
1955 unsigned long sun4v_err_itlb_pte;
1956 unsigned long sun4v_err_itlb_error;
1958 void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
1961 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1963 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
1965 print_symbol(KERN_EMERG "SUN4V-ITLB: TPC<%s>\n", regs->tpc);
1966 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
1967 "pte[%lx] error[%lx]\n",
1968 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
1969 sun4v_err_itlb_pte, sun4v_err_itlb_error);
1974 unsigned long sun4v_err_dtlb_vaddr;
1975 unsigned long sun4v_err_dtlb_ctx;
1976 unsigned long sun4v_err_dtlb_pte;
1977 unsigned long sun4v_err_dtlb_error;
1979 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
1982 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1984 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
1986 print_symbol(KERN_EMERG "SUN4V-DTLB: TPC<%s>\n", regs->tpc);
1987 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
1988 "pte[%lx] error[%lx]\n",
1989 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
1990 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
1995 void hypervisor_tlbop_error(unsigned long err, unsigned long op)
1997 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
2001 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
2003 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
2007 void do_fpe_common(struct pt_regs *regs)
2009 if (regs->tstate & TSTATE_PRIV) {
2010 regs->tpc = regs->tnpc;
2013 unsigned long fsr = current_thread_info()->xfsr[0];
2016 if (test_thread_flag(TIF_32BIT)) {
2017 regs->tpc &= 0xffffffff;
2018 regs->tnpc &= 0xffffffff;
2020 info.si_signo = SIGFPE;
2022 info.si_addr = (void __user *)regs->tpc;
2024 info.si_code = __SI_FAULT;
2025 if ((fsr & 0x1c000) == (1 << 14)) {
2027 info.si_code = FPE_FLTINV;
2028 else if (fsr & 0x08)
2029 info.si_code = FPE_FLTOVF;
2030 else if (fsr & 0x04)
2031 info.si_code = FPE_FLTUND;
2032 else if (fsr & 0x02)
2033 info.si_code = FPE_FLTDIV;
2034 else if (fsr & 0x01)
2035 info.si_code = FPE_FLTRES;
2037 force_sig_info(SIGFPE, &info, current);
2041 void do_fpieee(struct pt_regs *regs)
2043 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2044 0, 0x24, SIGFPE) == NOTIFY_STOP)
2047 do_fpe_common(regs);
2050 extern int do_mathemu(struct pt_regs *, struct fpustate *);
2052 void do_fpother(struct pt_regs *regs)
2054 struct fpustate *f = FPUSTATE;
2057 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2058 0, 0x25, SIGFPE) == NOTIFY_STOP)
2061 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2062 case (2 << 14): /* unfinished_FPop */
2063 case (3 << 14): /* unimplemented_FPop */
2064 ret = do_mathemu(regs, f);
2069 do_fpe_common(regs);
2072 void do_tof(struct pt_regs *regs)
2076 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2077 0, 0x26, SIGEMT) == NOTIFY_STOP)
2080 if (regs->tstate & TSTATE_PRIV)
2081 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2082 if (test_thread_flag(TIF_32BIT)) {
2083 regs->tpc &= 0xffffffff;
2084 regs->tnpc &= 0xffffffff;
2086 info.si_signo = SIGEMT;
2088 info.si_code = EMT_TAGOVF;
2089 info.si_addr = (void __user *)regs->tpc;
2091 force_sig_info(SIGEMT, &info, current);
2094 void do_div0(struct pt_regs *regs)
2098 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2099 0, 0x28, SIGFPE) == NOTIFY_STOP)
2102 if (regs->tstate & TSTATE_PRIV)
2103 die_if_kernel("TL0: Kernel divide by zero.", regs);
2104 if (test_thread_flag(TIF_32BIT)) {
2105 regs->tpc &= 0xffffffff;
2106 regs->tnpc &= 0xffffffff;
2108 info.si_signo = SIGFPE;
2110 info.si_code = FPE_INTDIV;
2111 info.si_addr = (void __user *)regs->tpc;
2113 force_sig_info(SIGFPE, &info, current);
2116 void instruction_dump (unsigned int *pc)
2120 if ((((unsigned long) pc) & 3))
2123 printk("Instruction DUMP:");
2124 for (i = -3; i < 6; i++)
2125 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2129 static void user_instruction_dump (unsigned int __user *pc)
2132 unsigned int buf[9];
2134 if ((((unsigned long) pc) & 3))
2137 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2140 printk("Instruction DUMP:");
2141 for (i = 0; i < 9; i++)
2142 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2146 void show_stack(struct task_struct *tsk, unsigned long *_ksp)
2148 unsigned long pc, fp, thread_base, ksp;
2149 void *tp = task_stack_page(tsk);
2150 struct reg_window *rw;
2153 ksp = (unsigned long) _ksp;
2155 if (tp == current_thread_info())
2158 fp = ksp + STACK_BIAS;
2159 thread_base = (unsigned long) tp;
2161 printk("Call Trace:");
2162 #ifdef CONFIG_KALLSYMS
2166 /* Bogus frame pointer? */
2167 if (fp < (thread_base + sizeof(struct thread_info)) ||
2168 fp >= (thread_base + THREAD_SIZE))
2170 rw = (struct reg_window *)fp;
2172 printk(" [%016lx] ", pc);
2173 print_symbol("%s\n", pc);
2174 fp = rw->ins[6] + STACK_BIAS;
2175 } while (++count < 16);
2176 #ifndef CONFIG_KALLSYMS
2181 void dump_stack(void)
2185 __asm__ __volatile__("mov %%fp, %0"
2187 show_stack(current, ksp);
2190 EXPORT_SYMBOL(dump_stack);
2192 static inline int is_kernel_stack(struct task_struct *task,
2193 struct reg_window *rw)
2195 unsigned long rw_addr = (unsigned long) rw;
2196 unsigned long thread_base, thread_end;
2198 if (rw_addr < PAGE_OFFSET) {
2199 if (task != &init_task)
2203 thread_base = (unsigned long) task_stack_page(task);
2204 thread_end = thread_base + sizeof(union thread_union);
2205 if (rw_addr >= thread_base &&
2206 rw_addr < thread_end &&
2213 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2215 unsigned long fp = rw->ins[6];
2220 return (struct reg_window *) (fp + STACK_BIAS);
2223 void die_if_kernel(char *str, struct pt_regs *regs)
2225 static int die_counter;
2226 extern void smp_report_regs(void);
2229 /* Amuse the user. */
2232 " \"@'/ .. \\`@\"\n"
2236 printk("%s(%d): %s [#%d]\n", current->comm, current->pid, str, ++die_counter);
2237 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2238 __asm__ __volatile__("flushw");
2240 if (regs->tstate & TSTATE_PRIV) {
2241 struct reg_window *rw = (struct reg_window *)
2242 (regs->u_regs[UREG_FP] + STACK_BIAS);
2244 /* Stop the back trace when we hit userland or we
2245 * find some badly aligned kernel stack.
2249 is_kernel_stack(current, rw)) {
2250 printk("Caller[%016lx]", rw->ins[7]);
2251 print_symbol(": %s", rw->ins[7]);
2254 rw = kernel_stack_up(rw);
2256 instruction_dump ((unsigned int *) regs->tpc);
2258 if (test_thread_flag(TIF_32BIT)) {
2259 regs->tpc &= 0xffffffff;
2260 regs->tnpc &= 0xffffffff;
2262 user_instruction_dump ((unsigned int __user *) regs->tpc);
2269 if (regs->tstate & TSTATE_PRIV)
2274 #define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2275 #define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2277 extern int handle_popc(u32 insn, struct pt_regs *regs);
2278 extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
2279 extern int vis_emul(struct pt_regs *, unsigned int);
2281 void do_illegal_instruction(struct pt_regs *regs)
2283 unsigned long pc = regs->tpc;
2284 unsigned long tstate = regs->tstate;
2288 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2289 0, 0x10, SIGILL) == NOTIFY_STOP)
2292 if (tstate & TSTATE_PRIV)
2293 die_if_kernel("Kernel illegal instruction", regs);
2294 if (test_thread_flag(TIF_32BIT))
2296 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2297 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2298 if (handle_popc(insn, regs))
2300 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2301 if (handle_ldf_stq(insn, regs))
2303 } else if (tlb_type == hypervisor) {
2304 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2305 if (!vis_emul(regs, insn))
2308 struct fpustate *f = FPUSTATE;
2310 /* XXX maybe verify XFSR bits like
2311 * XXX do_fpother() does?
2313 if (do_mathemu(regs, f))
2318 info.si_signo = SIGILL;
2320 info.si_code = ILL_ILLOPC;
2321 info.si_addr = (void __user *)pc;
2323 force_sig_info(SIGILL, &info, current);
2326 extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
2328 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2332 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2333 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2336 if (regs->tstate & TSTATE_PRIV) {
2337 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2340 info.si_signo = SIGBUS;
2342 info.si_code = BUS_ADRALN;
2343 info.si_addr = (void __user *)sfar;
2345 force_sig_info(SIGBUS, &info, current);
2348 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2352 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2353 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2356 if (regs->tstate & TSTATE_PRIV) {
2357 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2360 info.si_signo = SIGBUS;
2362 info.si_code = BUS_ADRALN;
2363 info.si_addr = (void __user *) addr;
2365 force_sig_info(SIGBUS, &info, current);
2368 void do_privop(struct pt_regs *regs)
2372 if (notify_die(DIE_TRAP, "privileged operation", regs,
2373 0, 0x11, SIGILL) == NOTIFY_STOP)
2376 if (test_thread_flag(TIF_32BIT)) {
2377 regs->tpc &= 0xffffffff;
2378 regs->tnpc &= 0xffffffff;
2380 info.si_signo = SIGILL;
2382 info.si_code = ILL_PRVOPC;
2383 info.si_addr = (void __user *)regs->tpc;
2385 force_sig_info(SIGILL, &info, current);
2388 void do_privact(struct pt_regs *regs)
2393 /* Trap level 1 stuff or other traps we should never see... */
2394 void do_cee(struct pt_regs *regs)
2396 die_if_kernel("TL0: Cache Error Exception", regs);
2399 void do_cee_tl1(struct pt_regs *regs)
2401 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2402 die_if_kernel("TL1: Cache Error Exception", regs);
2405 void do_dae_tl1(struct pt_regs *regs)
2407 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2408 die_if_kernel("TL1: Data Access Exception", regs);
2411 void do_iae_tl1(struct pt_regs *regs)
2413 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2414 die_if_kernel("TL1: Instruction Access Exception", regs);
2417 void do_div0_tl1(struct pt_regs *regs)
2419 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2420 die_if_kernel("TL1: DIV0 Exception", regs);
2423 void do_fpdis_tl1(struct pt_regs *regs)
2425 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2426 die_if_kernel("TL1: FPU Disabled", regs);
2429 void do_fpieee_tl1(struct pt_regs *regs)
2431 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2432 die_if_kernel("TL1: FPU IEEE Exception", regs);
2435 void do_fpother_tl1(struct pt_regs *regs)
2437 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2438 die_if_kernel("TL1: FPU Other Exception", regs);
2441 void do_ill_tl1(struct pt_regs *regs)
2443 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2444 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2447 void do_irq_tl1(struct pt_regs *regs)
2449 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2450 die_if_kernel("TL1: IRQ Exception", regs);
2453 void do_lddfmna_tl1(struct pt_regs *regs)
2455 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2456 die_if_kernel("TL1: LDDF Exception", regs);
2459 void do_stdfmna_tl1(struct pt_regs *regs)
2461 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2462 die_if_kernel("TL1: STDF Exception", regs);
2465 void do_paw(struct pt_regs *regs)
2467 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2470 void do_paw_tl1(struct pt_regs *regs)
2472 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2473 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2476 void do_vaw(struct pt_regs *regs)
2478 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2481 void do_vaw_tl1(struct pt_regs *regs)
2483 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2484 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2487 void do_tof_tl1(struct pt_regs *regs)
2489 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2490 die_if_kernel("TL1: Tag Overflow Exception", regs);
2493 void do_getpsr(struct pt_regs *regs)
2495 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2496 regs->tpc = regs->tnpc;
2498 if (test_thread_flag(TIF_32BIT)) {
2499 regs->tpc &= 0xffffffff;
2500 regs->tnpc &= 0xffffffff;
2504 struct trap_per_cpu trap_block[NR_CPUS];
2506 /* This can get invoked before sched_init() so play it super safe
2507 * and use hard_smp_processor_id().
2509 void init_cur_cpu_trap(struct thread_info *t)
2511 int cpu = hard_smp_processor_id();
2512 struct trap_per_cpu *p = &trap_block[cpu];
2518 extern void thread_info_offsets_are_bolixed_dave(void);
2519 extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2520 extern void tsb_config_offsets_are_bolixed_dave(void);
2522 /* Only invoked on boot processor. */
2523 void __init trap_init(void)
2525 /* Compile time sanity check. */
2526 if (TI_TASK != offsetof(struct thread_info, task) ||
2527 TI_FLAGS != offsetof(struct thread_info, flags) ||
2528 TI_CPU != offsetof(struct thread_info, cpu) ||
2529 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2530 TI_KSP != offsetof(struct thread_info, ksp) ||
2531 TI_FAULT_ADDR != offsetof(struct thread_info, fault_address) ||
2532 TI_KREGS != offsetof(struct thread_info, kregs) ||
2533 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2534 TI_EXEC_DOMAIN != offsetof(struct thread_info, exec_domain) ||
2535 TI_REG_WINDOW != offsetof(struct thread_info, reg_window) ||
2536 TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) ||
2537 TI_GSR != offsetof(struct thread_info, gsr) ||
2538 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2539 TI_USER_CNTD0 != offsetof(struct thread_info, user_cntd0) ||
2540 TI_USER_CNTD1 != offsetof(struct thread_info, user_cntd1) ||
2541 TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) ||
2542 TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) ||
2543 TI_PCR != offsetof(struct thread_info, pcr_reg) ||
2544 TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) ||
2545 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2546 TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) ||
2547 TI_RESTART_BLOCK != offsetof(struct thread_info, restart_block) ||
2548 TI_KUNA_REGS != offsetof(struct thread_info, kern_una_regs) ||
2549 TI_KUNA_INSN != offsetof(struct thread_info, kern_una_insn) ||
2550 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2551 (TI_FPREGS & (64 - 1)))
2552 thread_info_offsets_are_bolixed_dave();
2554 if (TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, thread) ||
2555 (TRAP_PER_CPU_PGD_PADDR !=
2556 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2557 (TRAP_PER_CPU_CPU_MONDO_PA !=
2558 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2559 (TRAP_PER_CPU_DEV_MONDO_PA !=
2560 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2561 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2562 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2563 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2564 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2565 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2566 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2567 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2568 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2569 (TRAP_PER_CPU_FAULT_INFO !=
2570 offsetof(struct trap_per_cpu, fault_info)) ||
2571 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2572 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2573 (TRAP_PER_CPU_CPU_LIST_PA !=
2574 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2575 (TRAP_PER_CPU_TSB_HUGE !=
2576 offsetof(struct trap_per_cpu, tsb_huge)) ||
2577 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2578 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2579 (TRAP_PER_CPU_IRQ_WORKLIST !=
2580 offsetof(struct trap_per_cpu, irq_worklist)))
2581 trap_per_cpu_offsets_are_bolixed_dave();
2583 if ((TSB_CONFIG_TSB !=
2584 offsetof(struct tsb_config, tsb)) ||
2585 (TSB_CONFIG_RSS_LIMIT !=
2586 offsetof(struct tsb_config, tsb_rss_limit)) ||
2587 (TSB_CONFIG_NENTRIES !=
2588 offsetof(struct tsb_config, tsb_nentries)) ||
2589 (TSB_CONFIG_REG_VAL !=
2590 offsetof(struct tsb_config, tsb_reg_val)) ||
2591 (TSB_CONFIG_MAP_VADDR !=
2592 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2593 (TSB_CONFIG_MAP_PTE !=
2594 offsetof(struct tsb_config, tsb_map_pte)))
2595 tsb_config_offsets_are_bolixed_dave();
2597 /* Attach to the address space of init_task. On SMP we
2598 * do this in smp.c:smp_callin for other cpus.
2600 atomic_inc(&init_mm.mm_count);
2601 current->active_mm = &init_mm;