1 /* $Id: traps.c,v 1.85 2002/02/09 19:49:31 davem Exp $
2 * arch/sparc64/kernel/traps.c
4 * Copyright (C) 1995,1997 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com)
9 * I like traps on v9, :))))
12 #include <linux/config.h>
13 #include <linux/module.h>
14 #include <linux/sched.h> /* for jiffies */
15 #include <linux/kernel.h>
16 #include <linux/kallsyms.h>
17 #include <linux/signal.h>
18 #include <linux/smp.h>
19 #include <linux/smp_lock.h>
21 #include <linux/init.h>
23 #include <asm/delay.h>
24 #include <asm/system.h>
25 #include <asm/ptrace.h>
26 #include <asm/oplib.h>
28 #include <asm/pgtable.h>
29 #include <asm/unistd.h>
30 #include <asm/uaccess.h>
31 #include <asm/fpumacro.h>
34 #include <asm/estate.h>
35 #include <asm/chafsr.h>
36 #include <asm/sfafsr.h>
37 #include <asm/psrcompat.h>
38 #include <asm/processor.h>
39 #include <asm/timer.h>
40 #include <asm/kdebug.h>
43 #include <linux/kmod.h>
47 ATOMIC_NOTIFIER_HEAD(sparc64die_chain);
49 int register_die_notifier(struct notifier_block *nb)
51 return atomic_notifier_chain_register(&sparc64die_chain, nb);
53 EXPORT_SYMBOL(register_die_notifier);
55 int unregister_die_notifier(struct notifier_block *nb)
57 return atomic_notifier_chain_unregister(&sparc64die_chain, nb);
59 EXPORT_SYMBOL(unregister_die_notifier);
61 /* When an irrecoverable trap occurs at tl > 0, the trap entry
62 * code logs the trap state registers at every level in the trap
63 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
76 static void dump_tl1_traplog(struct tl1_traplog *p)
80 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
81 "dumping track stack.\n", p->tl);
83 limit = (tlb_type == hypervisor) ? 2 : 4;
84 for (i = 0; i < limit; i++) {
86 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
87 "TNPC[%016lx] TT[%lx]\n",
89 p->trapstack[i].tstate, p->trapstack[i].tpc,
90 p->trapstack[i].tnpc, p->trapstack[i].tt);
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): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1139 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1140 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1141 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1142 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1143 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1144 hipri = cheetah_get_hipri(afsr);
1145 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1146 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1147 hipri, cheetah_get_string(hipri));
1149 /* Try to get unumber if relevant. */
1150 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1151 CHAFSR_CPC | CHAFSR_CPU | \
1152 CHAFSR_UE | CHAFSR_CE | \
1153 CHAFSR_EDC | CHAFSR_EDU | \
1154 CHAFSR_UCC | CHAFSR_UCU | \
1155 CHAFSR_WDU | CHAFSR_WDC)
1156 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1157 if (afsr & ESYND_ERRORS) {
1161 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1162 syndrome = cheetah_ecc_syntab[syndrome];
1163 ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum));
1165 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1166 (recoverable ? KERN_WARNING : KERN_CRIT),
1167 smp_processor_id(), unum);
1168 } else if (afsr & MSYND_ERRORS) {
1172 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1173 syndrome = cheetah_mtag_syntab[syndrome];
1174 ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum));
1176 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1177 (recoverable ? KERN_WARNING : KERN_CRIT),
1178 smp_processor_id(), unum);
1181 /* Now dump the cache snapshots. */
1182 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx]\n",
1183 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1184 (int) info->dcache_index,
1188 printk("%s" "ERROR(%d): D-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1189 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1190 info->dcache_data[0],
1191 info->dcache_data[1],
1192 info->dcache_data[2],
1193 info->dcache_data[3]);
1194 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx] "
1195 "u[%016lx] l[%016lx]\n",
1196 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1197 (int) info->icache_index,
1202 info->icache_lower);
1203 printk("%s" "ERROR(%d): I-cache INSN0[%016lx] INSN1[%016lx] INSN2[%016lx] INSN3[%016lx]\n",
1204 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1205 info->icache_data[0],
1206 info->icache_data[1],
1207 info->icache_data[2],
1208 info->icache_data[3]);
1209 printk("%s" "ERROR(%d): I-cache INSN4[%016lx] INSN5[%016lx] INSN6[%016lx] INSN7[%016lx]\n",
1210 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1211 info->icache_data[4],
1212 info->icache_data[5],
1213 info->icache_data[6],
1214 info->icache_data[7]);
1215 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016lx]\n",
1216 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1217 (int) info->ecache_index, info->ecache_tag);
1218 printk("%s" "ERROR(%d): E-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1219 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1220 info->ecache_data[0],
1221 info->ecache_data[1],
1222 info->ecache_data[2],
1223 info->ecache_data[3]);
1225 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1226 while (afsr != 0UL) {
1227 unsigned long bit = cheetah_get_hipri(afsr);
1229 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1230 (recoverable ? KERN_WARNING : KERN_CRIT),
1231 bit, cheetah_get_string(bit));
1237 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1240 static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1242 unsigned long afsr, afar;
1245 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1248 if ((afsr & cheetah_afsr_errors) != 0) {
1250 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1258 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1260 : : "r" (afsr), "i" (ASI_AFSR));
1265 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1267 struct cheetah_err_info local_snapshot, *p;
1271 cheetah_flush_ecache();
1273 p = cheetah_get_error_log(afsr);
1275 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1277 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1278 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1282 /* Grab snapshot of logged error. */
1283 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1285 /* If the current trap snapshot does not match what the
1286 * trap handler passed along into our args, big trouble.
1287 * In such a case, mark the local copy as invalid.
1289 * Else, it matches and we mark the afsr in the non-local
1290 * copy as invalid so we may log new error traps there.
1292 if (p->afsr != afsr || p->afar != afar)
1293 local_snapshot.afsr = CHAFSR_INVALID;
1295 p->afsr = CHAFSR_INVALID;
1297 cheetah_flush_icache();
1298 cheetah_flush_dcache();
1300 /* Re-enable I-cache/D-cache */
1301 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1302 "or %%g1, %1, %%g1\n\t"
1303 "stxa %%g1, [%%g0] %0\n\t"
1306 : "i" (ASI_DCU_CONTROL_REG),
1307 "i" (DCU_DC | DCU_IC)
1310 /* Re-enable error reporting */
1311 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1312 "or %%g1, %1, %%g1\n\t"
1313 "stxa %%g1, [%%g0] %0\n\t"
1316 : "i" (ASI_ESTATE_ERROR_EN),
1317 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1320 /* Decide if we can continue after handling this trap and
1321 * logging the error.
1324 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1327 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1328 * error was logged while we had error reporting traps disabled.
1330 if (cheetah_recheck_errors(&local_snapshot)) {
1331 unsigned long new_afsr = local_snapshot.afsr;
1333 /* If we got a new asynchronous error, die... */
1334 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1335 CHAFSR_WDU | CHAFSR_CPU |
1336 CHAFSR_IVU | CHAFSR_UE |
1337 CHAFSR_BERR | CHAFSR_TO))
1342 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1345 panic("Irrecoverable Fast-ECC error trap.\n");
1347 /* Flush E-cache to kick the error trap handlers out. */
1348 cheetah_flush_ecache();
1351 /* Try to fix a correctable error by pushing the line out from
1352 * the E-cache. Recheck error reporting registers to see if the
1353 * problem is intermittent.
1355 static int cheetah_fix_ce(unsigned long physaddr)
1357 unsigned long orig_estate;
1358 unsigned long alias1, alias2;
1361 /* Make sure correctable error traps are disabled. */
1362 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1363 "andn %0, %1, %%g1\n\t"
1364 "stxa %%g1, [%%g0] %2\n\t"
1366 : "=&r" (orig_estate)
1367 : "i" (ESTATE_ERROR_CEEN),
1368 "i" (ASI_ESTATE_ERROR_EN)
1371 /* We calculate alias addresses that will force the
1372 * cache line in question out of the E-cache. Then
1373 * we bring it back in with an atomic instruction so
1374 * that we get it in some modified/exclusive state,
1375 * then we displace it again to try and get proper ECC
1376 * pushed back into the system.
1378 physaddr &= ~(8UL - 1UL);
1379 alias1 = (ecache_flush_physbase +
1380 (physaddr & ((ecache_flush_size >> 1) - 1)));
1381 alias2 = alias1 + (ecache_flush_size >> 1);
1382 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1383 "ldxa [%1] %3, %%g0\n\t"
1384 "casxa [%2] %3, %%g0, %%g0\n\t"
1385 "membar #StoreLoad | #StoreStore\n\t"
1386 "ldxa [%0] %3, %%g0\n\t"
1387 "ldxa [%1] %3, %%g0\n\t"
1390 : "r" (alias1), "r" (alias2),
1391 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1393 /* Did that trigger another error? */
1394 if (cheetah_recheck_errors(NULL)) {
1395 /* Try one more time. */
1396 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1398 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1399 if (cheetah_recheck_errors(NULL))
1404 /* No new error, intermittent problem. */
1408 /* Restore error enables. */
1409 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1411 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1416 /* Return non-zero if PADDR is a valid physical memory address. */
1417 static int cheetah_check_main_memory(unsigned long paddr)
1419 unsigned long vaddr = PAGE_OFFSET + paddr;
1421 if (vaddr > (unsigned long) high_memory)
1424 return kern_addr_valid(vaddr);
1427 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1429 struct cheetah_err_info local_snapshot, *p;
1430 int recoverable, is_memory;
1432 p = cheetah_get_error_log(afsr);
1434 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1436 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1437 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1441 /* Grab snapshot of logged error. */
1442 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1444 /* If the current trap snapshot does not match what the
1445 * trap handler passed along into our args, big trouble.
1446 * In such a case, mark the local copy as invalid.
1448 * Else, it matches and we mark the afsr in the non-local
1449 * copy as invalid so we may log new error traps there.
1451 if (p->afsr != afsr || p->afar != afar)
1452 local_snapshot.afsr = CHAFSR_INVALID;
1454 p->afsr = CHAFSR_INVALID;
1456 is_memory = cheetah_check_main_memory(afar);
1458 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1459 /* XXX Might want to log the results of this operation
1460 * XXX somewhere... -DaveM
1462 cheetah_fix_ce(afar);
1466 int flush_all, flush_line;
1468 flush_all = flush_line = 0;
1469 if ((afsr & CHAFSR_EDC) != 0UL) {
1470 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1474 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1475 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1481 /* Trap handler only disabled I-cache, flush it. */
1482 cheetah_flush_icache();
1484 /* Re-enable I-cache */
1485 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1486 "or %%g1, %1, %%g1\n\t"
1487 "stxa %%g1, [%%g0] %0\n\t"
1490 : "i" (ASI_DCU_CONTROL_REG),
1495 cheetah_flush_ecache();
1496 else if (flush_line)
1497 cheetah_flush_ecache_line(afar);
1500 /* Re-enable error reporting */
1501 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1502 "or %%g1, %1, %%g1\n\t"
1503 "stxa %%g1, [%%g0] %0\n\t"
1506 : "i" (ASI_ESTATE_ERROR_EN),
1507 "i" (ESTATE_ERROR_CEEN)
1510 /* Decide if we can continue after handling this trap and
1511 * logging the error.
1514 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1517 /* Re-check AFSR/AFAR */
1518 (void) cheetah_recheck_errors(&local_snapshot);
1521 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1524 panic("Irrecoverable Correctable-ECC error trap.\n");
1527 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1529 struct cheetah_err_info local_snapshot, *p;
1530 int recoverable, is_memory;
1533 /* Check for the special PCI poke sequence. */
1534 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1535 cheetah_flush_icache();
1536 cheetah_flush_dcache();
1538 /* Re-enable I-cache/D-cache */
1539 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1540 "or %%g1, %1, %%g1\n\t"
1541 "stxa %%g1, [%%g0] %0\n\t"
1544 : "i" (ASI_DCU_CONTROL_REG),
1545 "i" (DCU_DC | DCU_IC)
1548 /* Re-enable error reporting */
1549 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1550 "or %%g1, %1, %%g1\n\t"
1551 "stxa %%g1, [%%g0] %0\n\t"
1554 : "i" (ASI_ESTATE_ERROR_EN),
1555 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1558 (void) cheetah_recheck_errors(NULL);
1560 pci_poke_faulted = 1;
1562 regs->tnpc = regs->tpc + 4;
1567 p = cheetah_get_error_log(afsr);
1569 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1571 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1572 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1576 /* Grab snapshot of logged error. */
1577 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1579 /* If the current trap snapshot does not match what the
1580 * trap handler passed along into our args, big trouble.
1581 * In such a case, mark the local copy as invalid.
1583 * Else, it matches and we mark the afsr in the non-local
1584 * copy as invalid so we may log new error traps there.
1586 if (p->afsr != afsr || p->afar != afar)
1587 local_snapshot.afsr = CHAFSR_INVALID;
1589 p->afsr = CHAFSR_INVALID;
1591 is_memory = cheetah_check_main_memory(afar);
1594 int flush_all, flush_line;
1596 flush_all = flush_line = 0;
1597 if ((afsr & CHAFSR_EDU) != 0UL) {
1598 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1602 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1603 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1609 cheetah_flush_icache();
1610 cheetah_flush_dcache();
1612 /* Re-enable I/D caches */
1613 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1614 "or %%g1, %1, %%g1\n\t"
1615 "stxa %%g1, [%%g0] %0\n\t"
1618 : "i" (ASI_DCU_CONTROL_REG),
1619 "i" (DCU_IC | DCU_DC)
1623 cheetah_flush_ecache();
1624 else if (flush_line)
1625 cheetah_flush_ecache_line(afar);
1628 /* Re-enable error reporting */
1629 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1630 "or %%g1, %1, %%g1\n\t"
1631 "stxa %%g1, [%%g0] %0\n\t"
1634 : "i" (ASI_ESTATE_ERROR_EN),
1635 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1638 /* Decide if we can continue after handling this trap and
1639 * logging the error.
1642 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1645 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1646 * error was logged while we had error reporting traps disabled.
1648 if (cheetah_recheck_errors(&local_snapshot)) {
1649 unsigned long new_afsr = local_snapshot.afsr;
1651 /* If we got a new asynchronous error, die... */
1652 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1653 CHAFSR_WDU | CHAFSR_CPU |
1654 CHAFSR_IVU | CHAFSR_UE |
1655 CHAFSR_BERR | CHAFSR_TO))
1660 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1662 /* "Recoverable" here means we try to yank the page from ever
1663 * being newly used again. This depends upon a few things:
1664 * 1) Must be main memory, and AFAR must be valid.
1665 * 2) If we trapped from user, OK.
1666 * 3) Else, if we trapped from kernel we must find exception
1667 * table entry (ie. we have to have been accessing user
1670 * If AFAR is not in main memory, or we trapped from kernel
1671 * and cannot find an exception table entry, it is unacceptable
1672 * to try and continue.
1674 if (recoverable && is_memory) {
1675 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1676 /* OK, usermode access. */
1679 const struct exception_table_entry *entry;
1681 entry = search_exception_tables(regs->tpc);
1683 /* OK, kernel access to userspace. */
1687 /* BAD, privileged state is corrupted. */
1692 if (pfn_valid(afar >> PAGE_SHIFT))
1693 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1697 /* Only perform fixup if we still have a
1698 * recoverable condition.
1701 regs->tpc = entry->fixup;
1702 regs->tnpc = regs->tpc + 4;
1711 panic("Irrecoverable deferred error trap.\n");
1714 /* Handle a D/I cache parity error trap. TYPE is encoded as:
1716 * Bit0: 0=dcache,1=icache
1717 * Bit1: 0=recoverable,1=unrecoverable
1719 * The hardware has disabled both the I-cache and D-cache in
1720 * the %dcr register.
1722 void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1725 __cheetah_flush_icache();
1727 cheetah_plus_zap_dcache_parity();
1728 cheetah_flush_dcache();
1730 /* Re-enable I-cache/D-cache */
1731 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1732 "or %%g1, %1, %%g1\n\t"
1733 "stxa %%g1, [%%g0] %0\n\t"
1736 : "i" (ASI_DCU_CONTROL_REG),
1737 "i" (DCU_DC | DCU_IC)
1741 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1743 (type & 0x1) ? 'I' : 'D',
1745 panic("Irrecoverable Cheetah+ parity error.");
1748 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1750 (type & 0x1) ? 'I' : 'D',
1754 struct sun4v_error_entry {
1759 #define SUN4V_ERR_TYPE_UNDEFINED 0
1760 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1761 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1762 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1763 #define SUN4V_ERR_TYPE_WARNING_RES 4
1766 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1767 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1768 #define SUN4V_ERR_ATTRS_PIO 0x00000004
1769 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1770 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1771 #define SUN4V_ERR_ATTRS_USER_MODE 0x01000000
1772 #define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000
1773 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1781 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1782 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1784 static const char *sun4v_err_type_to_str(u32 type)
1787 case SUN4V_ERR_TYPE_UNDEFINED:
1789 case SUN4V_ERR_TYPE_UNCORRECTED_RES:
1790 return "uncorrected resumable";
1791 case SUN4V_ERR_TYPE_PRECISE_NONRES:
1792 return "precise nonresumable";
1793 case SUN4V_ERR_TYPE_DEFERRED_NONRES:
1794 return "deferred nonresumable";
1795 case SUN4V_ERR_TYPE_WARNING_RES:
1796 return "warning resumable";
1802 extern void __show_regs(struct pt_regs * regs);
1804 static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
1808 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1809 printk("%s: err_handle[%lx] err_stick[%lx] err_type[%08x:%s]\n",
1811 ent->err_handle, ent->err_stick,
1813 sun4v_err_type_to_str(ent->err_type));
1814 printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n",
1817 ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ?
1819 ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ?
1821 ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ?
1823 ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ?
1824 "integer-regs" : ""),
1825 ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ?
1827 ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ?
1829 ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ?
1831 ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ?
1832 "queue-full" : ""));
1833 printk("%s: err_raddr[%016lx] err_size[%u] err_cpu[%u]\n",
1835 ent->err_raddr, ent->err_size, ent->err_cpu);
1839 if ((cnt = atomic_read(ocnt)) != 0) {
1840 atomic_set(ocnt, 0);
1842 printk("%s: Queue overflowed %d times.\n",
1847 /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate.
1848 * Log the event and clear the first word of the entry.
1850 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
1852 struct sun4v_error_entry *ent, local_copy;
1853 struct trap_per_cpu *tb;
1854 unsigned long paddr;
1859 tb = &trap_block[cpu];
1860 paddr = tb->resum_kernel_buf_pa + offset;
1863 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1865 /* We have a local copy now, so release the entry. */
1866 ent->err_handle = 0;
1871 sun4v_log_error(regs, &local_copy, cpu,
1872 KERN_ERR "RESUMABLE ERROR",
1873 &sun4v_resum_oflow_cnt);
1876 /* If we try to printk() we'll probably make matters worse, by trying
1877 * to retake locks this cpu already holds or causing more errors. So
1878 * just bump a counter, and we'll report these counter bumps above.
1880 void sun4v_resum_overflow(struct pt_regs *regs)
1882 atomic_inc(&sun4v_resum_oflow_cnt);
1885 /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate.
1886 * Log the event, clear the first word of the entry, and die.
1888 void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
1890 struct sun4v_error_entry *ent, local_copy;
1891 struct trap_per_cpu *tb;
1892 unsigned long paddr;
1897 tb = &trap_block[cpu];
1898 paddr = tb->nonresum_kernel_buf_pa + offset;
1901 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1903 /* We have a local copy now, so release the entry. */
1904 ent->err_handle = 0;
1910 /* Check for the special PCI poke sequence. */
1911 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
1912 pci_poke_faulted = 1;
1914 regs->tnpc = regs->tpc + 4;
1919 sun4v_log_error(regs, &local_copy, cpu,
1920 KERN_EMERG "NON-RESUMABLE ERROR",
1921 &sun4v_nonresum_oflow_cnt);
1923 panic("Non-resumable error.");
1926 /* If we try to printk() we'll probably make matters worse, by trying
1927 * to retake locks this cpu already holds or causing more errors. So
1928 * just bump a counter, and we'll report these counter bumps above.
1930 void sun4v_nonresum_overflow(struct pt_regs *regs)
1932 /* XXX Actually even this can make not that much sense. Perhaps
1933 * XXX we should just pull the plug and panic directly from here?
1935 atomic_inc(&sun4v_nonresum_oflow_cnt);
1938 unsigned long sun4v_err_itlb_vaddr;
1939 unsigned long sun4v_err_itlb_ctx;
1940 unsigned long sun4v_err_itlb_pte;
1941 unsigned long sun4v_err_itlb_error;
1943 void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
1946 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1948 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
1950 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
1951 "pte[%lx] error[%lx]\n",
1952 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
1953 sun4v_err_itlb_pte, sun4v_err_itlb_error);
1958 unsigned long sun4v_err_dtlb_vaddr;
1959 unsigned long sun4v_err_dtlb_ctx;
1960 unsigned long sun4v_err_dtlb_pte;
1961 unsigned long sun4v_err_dtlb_error;
1963 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
1966 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1968 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
1970 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
1971 "pte[%lx] error[%lx]\n",
1972 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
1973 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
1978 void hypervisor_tlbop_error(unsigned long err, unsigned long op)
1980 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
1984 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
1986 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
1990 void do_fpe_common(struct pt_regs *regs)
1992 if (regs->tstate & TSTATE_PRIV) {
1993 regs->tpc = regs->tnpc;
1996 unsigned long fsr = current_thread_info()->xfsr[0];
1999 if (test_thread_flag(TIF_32BIT)) {
2000 regs->tpc &= 0xffffffff;
2001 regs->tnpc &= 0xffffffff;
2003 info.si_signo = SIGFPE;
2005 info.si_addr = (void __user *)regs->tpc;
2007 info.si_code = __SI_FAULT;
2008 if ((fsr & 0x1c000) == (1 << 14)) {
2010 info.si_code = FPE_FLTINV;
2011 else if (fsr & 0x08)
2012 info.si_code = FPE_FLTOVF;
2013 else if (fsr & 0x04)
2014 info.si_code = FPE_FLTUND;
2015 else if (fsr & 0x02)
2016 info.si_code = FPE_FLTDIV;
2017 else if (fsr & 0x01)
2018 info.si_code = FPE_FLTRES;
2020 force_sig_info(SIGFPE, &info, current);
2024 void do_fpieee(struct pt_regs *regs)
2026 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2027 0, 0x24, SIGFPE) == NOTIFY_STOP)
2030 do_fpe_common(regs);
2033 extern int do_mathemu(struct pt_regs *, struct fpustate *);
2035 void do_fpother(struct pt_regs *regs)
2037 struct fpustate *f = FPUSTATE;
2040 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2041 0, 0x25, SIGFPE) == NOTIFY_STOP)
2044 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2045 case (2 << 14): /* unfinished_FPop */
2046 case (3 << 14): /* unimplemented_FPop */
2047 ret = do_mathemu(regs, f);
2052 do_fpe_common(regs);
2055 void do_tof(struct pt_regs *regs)
2059 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2060 0, 0x26, SIGEMT) == NOTIFY_STOP)
2063 if (regs->tstate & TSTATE_PRIV)
2064 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2065 if (test_thread_flag(TIF_32BIT)) {
2066 regs->tpc &= 0xffffffff;
2067 regs->tnpc &= 0xffffffff;
2069 info.si_signo = SIGEMT;
2071 info.si_code = EMT_TAGOVF;
2072 info.si_addr = (void __user *)regs->tpc;
2074 force_sig_info(SIGEMT, &info, current);
2077 void do_div0(struct pt_regs *regs)
2081 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2082 0, 0x28, SIGFPE) == NOTIFY_STOP)
2085 if (regs->tstate & TSTATE_PRIV)
2086 die_if_kernel("TL0: Kernel divide by zero.", regs);
2087 if (test_thread_flag(TIF_32BIT)) {
2088 regs->tpc &= 0xffffffff;
2089 regs->tnpc &= 0xffffffff;
2091 info.si_signo = SIGFPE;
2093 info.si_code = FPE_INTDIV;
2094 info.si_addr = (void __user *)regs->tpc;
2096 force_sig_info(SIGFPE, &info, current);
2099 void instruction_dump (unsigned int *pc)
2103 if ((((unsigned long) pc) & 3))
2106 printk("Instruction DUMP:");
2107 for (i = -3; i < 6; i++)
2108 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2112 static void user_instruction_dump (unsigned int __user *pc)
2115 unsigned int buf[9];
2117 if ((((unsigned long) pc) & 3))
2120 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2123 printk("Instruction DUMP:");
2124 for (i = 0; i < 9; i++)
2125 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2129 void show_stack(struct task_struct *tsk, unsigned long *_ksp)
2131 unsigned long pc, fp, thread_base, ksp;
2132 void *tp = task_stack_page(tsk);
2133 struct reg_window *rw;
2136 ksp = (unsigned long) _ksp;
2138 if (tp == current_thread_info())
2141 fp = ksp + STACK_BIAS;
2142 thread_base = (unsigned long) tp;
2144 printk("Call Trace:");
2145 #ifdef CONFIG_KALLSYMS
2149 /* Bogus frame pointer? */
2150 if (fp < (thread_base + sizeof(struct thread_info)) ||
2151 fp >= (thread_base + THREAD_SIZE))
2153 rw = (struct reg_window *)fp;
2155 printk(" [%016lx] ", pc);
2156 print_symbol("%s\n", pc);
2157 fp = rw->ins[6] + STACK_BIAS;
2158 } while (++count < 16);
2159 #ifndef CONFIG_KALLSYMS
2164 void dump_stack(void)
2168 __asm__ __volatile__("mov %%fp, %0"
2170 show_stack(current, ksp);
2173 EXPORT_SYMBOL(dump_stack);
2175 static inline int is_kernel_stack(struct task_struct *task,
2176 struct reg_window *rw)
2178 unsigned long rw_addr = (unsigned long) rw;
2179 unsigned long thread_base, thread_end;
2181 if (rw_addr < PAGE_OFFSET) {
2182 if (task != &init_task)
2186 thread_base = (unsigned long) task_stack_page(task);
2187 thread_end = thread_base + sizeof(union thread_union);
2188 if (rw_addr >= thread_base &&
2189 rw_addr < thread_end &&
2196 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2198 unsigned long fp = rw->ins[6];
2203 return (struct reg_window *) (fp + STACK_BIAS);
2206 void die_if_kernel(char *str, struct pt_regs *regs)
2208 static int die_counter;
2209 extern void smp_report_regs(void);
2212 /* Amuse the user. */
2215 " \"@'/ .. \\`@\"\n"
2219 printk("%s(%d): %s [#%d]\n", current->comm, current->pid, str, ++die_counter);
2220 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2221 __asm__ __volatile__("flushw");
2223 if (regs->tstate & TSTATE_PRIV) {
2224 struct reg_window *rw = (struct reg_window *)
2225 (regs->u_regs[UREG_FP] + STACK_BIAS);
2227 /* Stop the back trace when we hit userland or we
2228 * find some badly aligned kernel stack.
2232 is_kernel_stack(current, rw)) {
2233 printk("Caller[%016lx]", rw->ins[7]);
2234 print_symbol(": %s", rw->ins[7]);
2237 rw = kernel_stack_up(rw);
2239 instruction_dump ((unsigned int *) regs->tpc);
2241 if (test_thread_flag(TIF_32BIT)) {
2242 regs->tpc &= 0xffffffff;
2243 regs->tnpc &= 0xffffffff;
2245 user_instruction_dump ((unsigned int __user *) regs->tpc);
2252 if (regs->tstate & TSTATE_PRIV)
2257 extern int handle_popc(u32 insn, struct pt_regs *regs);
2258 extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
2260 void do_illegal_instruction(struct pt_regs *regs)
2262 unsigned long pc = regs->tpc;
2263 unsigned long tstate = regs->tstate;
2267 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2268 0, 0x10, SIGILL) == NOTIFY_STOP)
2271 if (tstate & TSTATE_PRIV)
2272 die_if_kernel("Kernel illegal instruction", regs);
2273 if (test_thread_flag(TIF_32BIT))
2275 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2276 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2277 if (handle_popc(insn, regs))
2279 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2280 if (handle_ldf_stq(insn, regs))
2282 } else if (tlb_type == hypervisor) {
2283 extern int vis_emul(struct pt_regs *, unsigned int);
2285 if (!vis_emul(regs, insn))
2289 info.si_signo = SIGILL;
2291 info.si_code = ILL_ILLOPC;
2292 info.si_addr = (void __user *)pc;
2294 force_sig_info(SIGILL, &info, current);
2297 extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
2299 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2303 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2304 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2307 if (regs->tstate & TSTATE_PRIV) {
2308 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2311 info.si_signo = SIGBUS;
2313 info.si_code = BUS_ADRALN;
2314 info.si_addr = (void __user *)sfar;
2316 force_sig_info(SIGBUS, &info, current);
2319 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2323 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2324 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2327 if (regs->tstate & TSTATE_PRIV) {
2328 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2331 info.si_signo = SIGBUS;
2333 info.si_code = BUS_ADRALN;
2334 info.si_addr = (void __user *) addr;
2336 force_sig_info(SIGBUS, &info, current);
2339 void do_privop(struct pt_regs *regs)
2343 if (notify_die(DIE_TRAP, "privileged operation", regs,
2344 0, 0x11, SIGILL) == NOTIFY_STOP)
2347 if (test_thread_flag(TIF_32BIT)) {
2348 regs->tpc &= 0xffffffff;
2349 regs->tnpc &= 0xffffffff;
2351 info.si_signo = SIGILL;
2353 info.si_code = ILL_PRVOPC;
2354 info.si_addr = (void __user *)regs->tpc;
2356 force_sig_info(SIGILL, &info, current);
2359 void do_privact(struct pt_regs *regs)
2364 /* Trap level 1 stuff or other traps we should never see... */
2365 void do_cee(struct pt_regs *regs)
2367 die_if_kernel("TL0: Cache Error Exception", regs);
2370 void do_cee_tl1(struct pt_regs *regs)
2372 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2373 die_if_kernel("TL1: Cache Error Exception", regs);
2376 void do_dae_tl1(struct pt_regs *regs)
2378 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2379 die_if_kernel("TL1: Data Access Exception", regs);
2382 void do_iae_tl1(struct pt_regs *regs)
2384 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2385 die_if_kernel("TL1: Instruction Access Exception", regs);
2388 void do_div0_tl1(struct pt_regs *regs)
2390 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2391 die_if_kernel("TL1: DIV0 Exception", regs);
2394 void do_fpdis_tl1(struct pt_regs *regs)
2396 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2397 die_if_kernel("TL1: FPU Disabled", regs);
2400 void do_fpieee_tl1(struct pt_regs *regs)
2402 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2403 die_if_kernel("TL1: FPU IEEE Exception", regs);
2406 void do_fpother_tl1(struct pt_regs *regs)
2408 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2409 die_if_kernel("TL1: FPU Other Exception", regs);
2412 void do_ill_tl1(struct pt_regs *regs)
2414 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2415 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2418 void do_irq_tl1(struct pt_regs *regs)
2420 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2421 die_if_kernel("TL1: IRQ Exception", regs);
2424 void do_lddfmna_tl1(struct pt_regs *regs)
2426 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2427 die_if_kernel("TL1: LDDF Exception", regs);
2430 void do_stdfmna_tl1(struct pt_regs *regs)
2432 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2433 die_if_kernel("TL1: STDF Exception", regs);
2436 void do_paw(struct pt_regs *regs)
2438 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2441 void do_paw_tl1(struct pt_regs *regs)
2443 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2444 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2447 void do_vaw(struct pt_regs *regs)
2449 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2452 void do_vaw_tl1(struct pt_regs *regs)
2454 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2455 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2458 void do_tof_tl1(struct pt_regs *regs)
2460 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2461 die_if_kernel("TL1: Tag Overflow Exception", regs);
2464 void do_getpsr(struct pt_regs *regs)
2466 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2467 regs->tpc = regs->tnpc;
2469 if (test_thread_flag(TIF_32BIT)) {
2470 regs->tpc &= 0xffffffff;
2471 regs->tnpc &= 0xffffffff;
2475 struct trap_per_cpu trap_block[NR_CPUS];
2477 /* This can get invoked before sched_init() so play it super safe
2478 * and use hard_smp_processor_id().
2480 void init_cur_cpu_trap(struct thread_info *t)
2482 int cpu = hard_smp_processor_id();
2483 struct trap_per_cpu *p = &trap_block[cpu];
2489 extern void thread_info_offsets_are_bolixed_dave(void);
2490 extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2491 extern void tsb_config_offsets_are_bolixed_dave(void);
2493 /* Only invoked on boot processor. */
2494 void __init trap_init(void)
2496 /* Compile time sanity check. */
2497 if (TI_TASK != offsetof(struct thread_info, task) ||
2498 TI_FLAGS != offsetof(struct thread_info, flags) ||
2499 TI_CPU != offsetof(struct thread_info, cpu) ||
2500 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2501 TI_KSP != offsetof(struct thread_info, ksp) ||
2502 TI_FAULT_ADDR != offsetof(struct thread_info, fault_address) ||
2503 TI_KREGS != offsetof(struct thread_info, kregs) ||
2504 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2505 TI_EXEC_DOMAIN != offsetof(struct thread_info, exec_domain) ||
2506 TI_REG_WINDOW != offsetof(struct thread_info, reg_window) ||
2507 TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) ||
2508 TI_GSR != offsetof(struct thread_info, gsr) ||
2509 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2510 TI_USER_CNTD0 != offsetof(struct thread_info, user_cntd0) ||
2511 TI_USER_CNTD1 != offsetof(struct thread_info, user_cntd1) ||
2512 TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) ||
2513 TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) ||
2514 TI_PCR != offsetof(struct thread_info, pcr_reg) ||
2515 TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) ||
2516 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2517 TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) ||
2518 TI_RESTART_BLOCK != offsetof(struct thread_info, restart_block) ||
2519 TI_KUNA_REGS != offsetof(struct thread_info, kern_una_regs) ||
2520 TI_KUNA_INSN != offsetof(struct thread_info, kern_una_insn) ||
2521 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2522 (TI_FPREGS & (64 - 1)))
2523 thread_info_offsets_are_bolixed_dave();
2525 if (TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, thread) ||
2526 (TRAP_PER_CPU_PGD_PADDR !=
2527 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2528 (TRAP_PER_CPU_CPU_MONDO_PA !=
2529 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2530 (TRAP_PER_CPU_DEV_MONDO_PA !=
2531 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2532 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2533 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2534 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2535 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2536 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2537 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2538 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2539 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2540 (TRAP_PER_CPU_FAULT_INFO !=
2541 offsetof(struct trap_per_cpu, fault_info)) ||
2542 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2543 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2544 (TRAP_PER_CPU_CPU_LIST_PA !=
2545 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2546 (TRAP_PER_CPU_TSB_HUGE !=
2547 offsetof(struct trap_per_cpu, tsb_huge)) ||
2548 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2549 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2550 (TRAP_PER_CPU_IRQ_WORKLIST !=
2551 offsetof(struct trap_per_cpu, irq_worklist)))
2552 trap_per_cpu_offsets_are_bolixed_dave();
2554 if ((TSB_CONFIG_TSB !=
2555 offsetof(struct tsb_config, tsb)) ||
2556 (TSB_CONFIG_RSS_LIMIT !=
2557 offsetof(struct tsb_config, tsb_rss_limit)) ||
2558 (TSB_CONFIG_NENTRIES !=
2559 offsetof(struct tsb_config, tsb_nentries)) ||
2560 (TSB_CONFIG_REG_VAL !=
2561 offsetof(struct tsb_config, tsb_reg_val)) ||
2562 (TSB_CONFIG_MAP_VADDR !=
2563 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2564 (TSB_CONFIG_MAP_PTE !=
2565 offsetof(struct tsb_config, tsb_map_pte)))
2566 tsb_config_offsets_are_bolixed_dave();
2568 /* Attach to the address space of init_task. On SMP we
2569 * do this in smp.c:smp_callin for other cpus.
2571 atomic_inc(&init_mm.mm_count);
2572 current->active_mm = &init_mm;