1 // SPDX-License-Identifier: GPL-2.0-only
2 /* arch/sparc64/kernel/traps.c
9 * I like traps on v9, :))))
12 #include <linux/extable.h>
13 #include <linux/sched/mm.h>
14 #include <linux/sched/debug.h>
15 #include <linux/linkage.h>
16 #include <linux/kernel.h>
17 #include <linux/signal.h>
18 #include <linux/smp.h>
20 #include <linux/init.h>
21 #include <linux/kallsyms.h>
22 #include <linux/kdebug.h>
23 #include <linux/ftrace.h>
24 #include <linux/reboot.h>
25 #include <linux/gfp.h>
26 #include <linux/context_tracking.h>
29 #include <asm/delay.h>
30 #include <asm/ptrace.h>
31 #include <asm/oplib.h>
33 #include <asm/unistd.h>
34 #include <linux/uaccess.h>
35 #include <asm/fpumacro.h>
38 #include <asm/estate.h>
39 #include <asm/chafsr.h>
40 #include <asm/sfafsr.h>
41 #include <asm/psrcompat.h>
42 #include <asm/processor.h>
43 #include <asm/timer.h>
46 #include <asm/memctrl.h>
47 #include <asm/cacheflush.h>
48 #include <asm/setup.h>
54 /* When an irrecoverable trap occurs at tl > 0, the trap entry
55 * code logs the trap state registers at every level in the trap
56 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
69 static void dump_tl1_traplog(struct tl1_traplog *p)
73 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
74 "dumping track stack.\n", p->tl);
76 limit = (tlb_type == hypervisor) ? 2 : 4;
77 for (i = 0; i < limit; i++) {
79 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
80 "TNPC[%016lx] TT[%lx]\n",
82 p->trapstack[i].tstate, p->trapstack[i].tpc,
83 p->trapstack[i].tnpc, p->trapstack[i].tt);
84 printk("TRAPLOG: TPC<%pS>\n", (void *) p->trapstack[i].tpc);
88 void bad_trap(struct pt_regs *regs, long lvl)
92 if (notify_die(DIE_TRAP, "bad trap", regs,
93 0, lvl, SIGTRAP) == NOTIFY_STOP)
97 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
98 die_if_kernel(buffer, regs);
102 if (regs->tstate & TSTATE_PRIV) {
103 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
104 die_if_kernel(buffer, regs);
106 if (test_thread_flag(TIF_32BIT)) {
107 regs->tpc &= 0xffffffff;
108 regs->tnpc &= 0xffffffff;
110 force_sig_fault_trapno(SIGILL, ILL_ILLTRP,
111 (void __user *)regs->tpc, lvl);
114 void bad_trap_tl1(struct pt_regs *regs, long lvl)
118 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
119 0, lvl, SIGTRAP) == NOTIFY_STOP)
122 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
124 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
125 die_if_kernel (buffer, regs);
128 #ifdef CONFIG_DEBUG_BUGVERBOSE
129 void do_BUG(const char *file, int line)
132 printk("kernel BUG at %s:%d!\n", file, line);
134 EXPORT_SYMBOL(do_BUG);
137 static DEFINE_SPINLOCK(dimm_handler_lock);
138 static dimm_printer_t dimm_handler;
140 static int sprintf_dimm(int synd_code, unsigned long paddr, char *buf, int buflen)
145 spin_lock_irqsave(&dimm_handler_lock, flags);
147 ret = dimm_handler(synd_code, paddr, buf, buflen);
148 } else if (tlb_type == spitfire) {
149 if (prom_getunumber(synd_code, paddr, buf, buflen) == -1)
155 spin_unlock_irqrestore(&dimm_handler_lock, flags);
160 int register_dimm_printer(dimm_printer_t func)
165 spin_lock_irqsave(&dimm_handler_lock, flags);
170 spin_unlock_irqrestore(&dimm_handler_lock, flags);
174 EXPORT_SYMBOL_GPL(register_dimm_printer);
176 void unregister_dimm_printer(dimm_printer_t func)
180 spin_lock_irqsave(&dimm_handler_lock, flags);
181 if (dimm_handler == func)
183 spin_unlock_irqrestore(&dimm_handler_lock, flags);
185 EXPORT_SYMBOL_GPL(unregister_dimm_printer);
187 void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
189 enum ctx_state prev_state = exception_enter();
191 if (notify_die(DIE_TRAP, "instruction access exception", regs,
192 0, 0x8, SIGTRAP) == NOTIFY_STOP)
195 if (regs->tstate & TSTATE_PRIV) {
196 printk("spitfire_insn_access_exception: SFSR[%016lx] "
197 "SFAR[%016lx], going.\n", sfsr, sfar);
198 die_if_kernel("Iax", regs);
200 if (test_thread_flag(TIF_32BIT)) {
201 regs->tpc &= 0xffffffff;
202 regs->tnpc &= 0xffffffff;
204 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)regs->tpc);
206 exception_exit(prev_state);
209 void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
211 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
212 0, 0x8, SIGTRAP) == NOTIFY_STOP)
215 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
216 spitfire_insn_access_exception(regs, sfsr, sfar);
219 void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
221 unsigned short type = (type_ctx >> 16);
222 unsigned short ctx = (type_ctx & 0xffff);
224 if (notify_die(DIE_TRAP, "instruction access exception", regs,
225 0, 0x8, SIGTRAP) == NOTIFY_STOP)
228 if (regs->tstate & TSTATE_PRIV) {
229 printk("sun4v_insn_access_exception: ADDR[%016lx] "
230 "CTX[%04x] TYPE[%04x], going.\n",
232 die_if_kernel("Iax", regs);
235 if (test_thread_flag(TIF_32BIT)) {
236 regs->tpc &= 0xffffffff;
237 regs->tnpc &= 0xffffffff;
239 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *) addr);
242 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
244 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
245 0, 0x8, SIGTRAP) == NOTIFY_STOP)
248 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
249 sun4v_insn_access_exception(regs, addr, type_ctx);
252 bool is_no_fault_exception(struct pt_regs *regs)
257 if (get_user(insn, (u32 __user *)regs->tpc) == -EFAULT)
261 * Must do a little instruction decoding here in order to
262 * decide on a course of action. The bits of interest are:
263 * insn[31:30] = op, where 3 indicates the load/store group
264 * insn[24:19] = op3, which identifies individual opcodes
265 * insn[13] indicates an immediate offset
266 * op3[4]=1 identifies alternate space instructions
267 * op3[5:4]=3 identifies floating point instructions
268 * op3[2]=1 identifies stores
269 * See "Opcode Maps" in the appendix of any Sparc V9
270 * architecture spec for full details.
272 if ((insn & 0xc0800000) == 0xc0800000) { /* op=3, op3[4]=1 */
273 if (insn & 0x2000) /* immediate offset */
274 asi = (regs->tstate >> 24); /* saved %asi */
276 asi = (insn >> 5); /* immediate asi */
277 if ((asi & 0xf6) == ASI_PNF) {
278 if (insn & 0x200000) /* op3[2], stores */
280 if (insn & 0x1000000) /* op3[5:4]=3 (fp) */
281 handle_ldf_stq(insn, regs);
283 handle_ld_nf(insn, regs);
290 void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
292 enum ctx_state prev_state = exception_enter();
294 if (notify_die(DIE_TRAP, "data access exception", regs,
295 0, 0x30, SIGTRAP) == NOTIFY_STOP)
298 if (regs->tstate & TSTATE_PRIV) {
299 /* Test if this comes from uaccess places. */
300 const struct exception_table_entry *entry;
302 entry = search_exception_tables(regs->tpc);
304 /* Ouch, somebody is trying VM hole tricks on us... */
305 #ifdef DEBUG_EXCEPTIONS
306 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
307 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
308 regs->tpc, entry->fixup);
310 regs->tpc = entry->fixup;
311 regs->tnpc = regs->tpc + 4;
315 printk("spitfire_data_access_exception: SFSR[%016lx] "
316 "SFAR[%016lx], going.\n", sfsr, sfar);
317 die_if_kernel("Dax", regs);
320 if (is_no_fault_exception(regs))
323 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)sfar);
325 exception_exit(prev_state);
328 void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
330 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
331 0, 0x30, SIGTRAP) == NOTIFY_STOP)
334 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
335 spitfire_data_access_exception(regs, sfsr, sfar);
338 void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
340 unsigned short type = (type_ctx >> 16);
341 unsigned short ctx = (type_ctx & 0xffff);
343 if (notify_die(DIE_TRAP, "data access exception", regs,
344 0, 0x8, SIGTRAP) == NOTIFY_STOP)
347 if (regs->tstate & TSTATE_PRIV) {
348 /* Test if this comes from uaccess places. */
349 const struct exception_table_entry *entry;
351 entry = search_exception_tables(regs->tpc);
353 /* Ouch, somebody is trying VM hole tricks on us... */
354 #ifdef DEBUG_EXCEPTIONS
355 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
356 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
357 regs->tpc, entry->fixup);
359 regs->tpc = entry->fixup;
360 regs->tnpc = regs->tpc + 4;
363 printk("sun4v_data_access_exception: ADDR[%016lx] "
364 "CTX[%04x] TYPE[%04x], going.\n",
366 die_if_kernel("Dax", regs);
369 if (test_thread_flag(TIF_32BIT)) {
370 regs->tpc &= 0xffffffff;
371 regs->tnpc &= 0xffffffff;
373 if (is_no_fault_exception(regs))
376 /* MCD (Memory Corruption Detection) disabled trap (TT=0x19) in HV
377 * is vectored thorugh data access exception trap with fault type
378 * set to HV_FAULT_TYPE_MCD_DIS. Check for MCD disabled trap.
379 * Accessing an address with invalid ASI for the address, for
380 * example setting an ADI tag on an address with ASI_MCD_PRIMARY
381 * when TTE.mcd is not set for the VA, is also vectored into
382 * kerbel by HV as data access exception with fault type set to
383 * HV_FAULT_TYPE_INV_ASI.
386 case HV_FAULT_TYPE_INV_ASI:
387 force_sig_fault(SIGILL, ILL_ILLADR, (void __user *)addr);
389 case HV_FAULT_TYPE_MCD_DIS:
390 force_sig_fault(SIGSEGV, SEGV_ACCADI, (void __user *)addr);
393 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)addr);
398 void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
400 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
401 0, 0x8, SIGTRAP) == NOTIFY_STOP)
404 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
405 sun4v_data_access_exception(regs, addr, type_ctx);
409 #include "pci_impl.h"
412 /* When access exceptions happen, we must do this. */
413 static void spitfire_clean_and_reenable_l1_caches(void)
417 if (tlb_type != spitfire)
421 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
422 spitfire_put_icache_tag(va, 0x0);
423 spitfire_put_dcache_tag(va, 0x0);
426 /* Re-enable in LSU. */
427 __asm__ __volatile__("flush %%g6\n\t"
429 "stxa %0, [%%g0] %1\n\t"
432 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
433 LSU_CONTROL_IM | LSU_CONTROL_DM),
434 "i" (ASI_LSU_CONTROL)
438 static void spitfire_enable_estate_errors(void)
440 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
443 : "r" (ESTATE_ERR_ALL),
444 "i" (ASI_ESTATE_ERROR_EN));
447 static char ecc_syndrome_table[] = {
448 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
449 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
450 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
451 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
452 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
453 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
454 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
455 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
456 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
457 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
458 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
459 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
460 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
461 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
462 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
463 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
464 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
465 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
466 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
467 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
468 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
469 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
470 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
471 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
472 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
473 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
474 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
475 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
476 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
477 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
478 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
479 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
482 static char *syndrome_unknown = "<Unknown>";
484 static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
486 unsigned short scode;
487 char memmod_str[64], *p;
490 scode = ecc_syndrome_table[udbl & 0xff];
491 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
492 p = syndrome_unknown;
495 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
496 "Memory Module \"%s\"\n",
497 smp_processor_id(), scode, p);
501 scode = ecc_syndrome_table[udbh & 0xff];
502 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
503 p = syndrome_unknown;
506 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
507 "Memory Module \"%s\"\n",
508 smp_processor_id(), scode, p);
513 static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
516 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
517 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
518 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
520 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
522 /* We always log it, even if someone is listening for this
525 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
526 0, TRAP_TYPE_CEE, SIGTRAP);
528 /* The Correctable ECC Error trap does not disable I/D caches. So
529 * we only have to restore the ESTATE Error Enable register.
531 spitfire_enable_estate_errors();
534 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)
536 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
537 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
538 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
540 /* XXX add more human friendly logging of the error status
541 * XXX as is implemented for cheetah
544 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
546 /* We always log it, even if someone is listening for this
549 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
552 if (regs->tstate & TSTATE_PRIV) {
554 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
555 die_if_kernel("UE", regs);
558 /* XXX need more intelligent processing here, such as is implemented
559 * XXX for cheetah errors, in fact if the E-cache still holds the
560 * XXX line with bad parity this will loop
563 spitfire_clean_and_reenable_l1_caches();
564 spitfire_enable_estate_errors();
566 if (test_thread_flag(TIF_32BIT)) {
567 regs->tpc &= 0xffffffff;
568 regs->tnpc &= 0xffffffff;
570 force_sig_fault(SIGBUS, BUS_OBJERR, (void *)0);
573 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
575 unsigned long afsr, tt, udbh, udbl;
578 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
579 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
580 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
581 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
582 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
585 if (tt == TRAP_TYPE_DAE &&
586 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
587 spitfire_clean_and_reenable_l1_caches();
588 spitfire_enable_estate_errors();
590 pci_poke_faulted = 1;
591 regs->tnpc = regs->tpc + 4;
596 if (afsr & SFAFSR_UE)
597 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
599 if (tt == TRAP_TYPE_CEE) {
600 /* Handle the case where we took a CEE trap, but ACK'd
601 * only the UE state in the UDB error registers.
603 if (afsr & SFAFSR_UE) {
604 if (udbh & UDBE_CE) {
605 __asm__ __volatile__(
606 "stxa %0, [%1] %2\n\t"
609 : "r" (udbh & UDBE_CE),
610 "r" (0x0), "i" (ASI_UDB_ERROR_W));
612 if (udbl & UDBE_CE) {
613 __asm__ __volatile__(
614 "stxa %0, [%1] %2\n\t"
617 : "r" (udbl & UDBE_CE),
618 "r" (0x18), "i" (ASI_UDB_ERROR_W));
622 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
626 int cheetah_pcache_forced_on;
628 void cheetah_enable_pcache(void)
632 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
635 __asm__ __volatile__("ldxa [%%g0] %1, %0"
637 : "i" (ASI_DCU_CONTROL_REG));
638 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
639 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
642 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
645 /* Cheetah error trap handling. */
646 static unsigned long ecache_flush_physbase;
647 static unsigned long ecache_flush_linesize;
648 static unsigned long ecache_flush_size;
650 /* This table is ordered in priority of errors and matches the
651 * AFAR overwrite policy as well.
654 struct afsr_error_table {
659 static const char CHAFSR_PERR_msg[] =
660 "System interface protocol error";
661 static const char CHAFSR_IERR_msg[] =
662 "Internal processor error";
663 static const char CHAFSR_ISAP_msg[] =
664 "System request parity error on incoming address";
665 static const char CHAFSR_UCU_msg[] =
666 "Uncorrectable E-cache ECC error for ifetch/data";
667 static const char CHAFSR_UCC_msg[] =
668 "SW Correctable E-cache ECC error for ifetch/data";
669 static const char CHAFSR_UE_msg[] =
670 "Uncorrectable system bus data ECC error for read";
671 static const char CHAFSR_EDU_msg[] =
672 "Uncorrectable E-cache ECC error for stmerge/blkld";
673 static const char CHAFSR_EMU_msg[] =
674 "Uncorrectable system bus MTAG error";
675 static const char CHAFSR_WDU_msg[] =
676 "Uncorrectable E-cache ECC error for writeback";
677 static const char CHAFSR_CPU_msg[] =
678 "Uncorrectable ECC error for copyout";
679 static const char CHAFSR_CE_msg[] =
680 "HW corrected system bus data ECC error for read";
681 static const char CHAFSR_EDC_msg[] =
682 "HW corrected E-cache ECC error for stmerge/blkld";
683 static const char CHAFSR_EMC_msg[] =
684 "HW corrected system bus MTAG ECC error";
685 static const char CHAFSR_WDC_msg[] =
686 "HW corrected E-cache ECC error for writeback";
687 static const char CHAFSR_CPC_msg[] =
688 "HW corrected ECC error for copyout";
689 static const char CHAFSR_TO_msg[] =
690 "Unmapped error from system bus";
691 static const char CHAFSR_BERR_msg[] =
692 "Bus error response from system bus";
693 static const char CHAFSR_IVC_msg[] =
694 "HW corrected system bus data ECC error for ivec read";
695 static const char CHAFSR_IVU_msg[] =
696 "Uncorrectable system bus data ECC error for ivec read";
697 static struct afsr_error_table __cheetah_error_table[] = {
698 { CHAFSR_PERR, CHAFSR_PERR_msg },
699 { CHAFSR_IERR, CHAFSR_IERR_msg },
700 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
701 { CHAFSR_UCU, CHAFSR_UCU_msg },
702 { CHAFSR_UCC, CHAFSR_UCC_msg },
703 { CHAFSR_UE, CHAFSR_UE_msg },
704 { CHAFSR_EDU, CHAFSR_EDU_msg },
705 { CHAFSR_EMU, CHAFSR_EMU_msg },
706 { CHAFSR_WDU, CHAFSR_WDU_msg },
707 { CHAFSR_CPU, CHAFSR_CPU_msg },
708 { CHAFSR_CE, CHAFSR_CE_msg },
709 { CHAFSR_EDC, CHAFSR_EDC_msg },
710 { CHAFSR_EMC, CHAFSR_EMC_msg },
711 { CHAFSR_WDC, CHAFSR_WDC_msg },
712 { CHAFSR_CPC, CHAFSR_CPC_msg },
713 { CHAFSR_TO, CHAFSR_TO_msg },
714 { CHAFSR_BERR, CHAFSR_BERR_msg },
715 /* These two do not update the AFAR. */
716 { CHAFSR_IVC, CHAFSR_IVC_msg },
717 { CHAFSR_IVU, CHAFSR_IVU_msg },
720 static const char CHPAFSR_DTO_msg[] =
721 "System bus unmapped error for prefetch/storequeue-read";
722 static const char CHPAFSR_DBERR_msg[] =
723 "System bus error for prefetch/storequeue-read";
724 static const char CHPAFSR_THCE_msg[] =
725 "Hardware corrected E-cache Tag ECC error";
726 static const char CHPAFSR_TSCE_msg[] =
727 "SW handled correctable E-cache Tag ECC error";
728 static const char CHPAFSR_TUE_msg[] =
729 "Uncorrectable E-cache Tag ECC error";
730 static const char CHPAFSR_DUE_msg[] =
731 "System bus uncorrectable data ECC error due to prefetch/store-fill";
732 static struct afsr_error_table __cheetah_plus_error_table[] = {
733 { CHAFSR_PERR, CHAFSR_PERR_msg },
734 { CHAFSR_IERR, CHAFSR_IERR_msg },
735 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
736 { CHAFSR_UCU, CHAFSR_UCU_msg },
737 { CHAFSR_UCC, CHAFSR_UCC_msg },
738 { CHAFSR_UE, CHAFSR_UE_msg },
739 { CHAFSR_EDU, CHAFSR_EDU_msg },
740 { CHAFSR_EMU, CHAFSR_EMU_msg },
741 { CHAFSR_WDU, CHAFSR_WDU_msg },
742 { CHAFSR_CPU, CHAFSR_CPU_msg },
743 { CHAFSR_CE, CHAFSR_CE_msg },
744 { CHAFSR_EDC, CHAFSR_EDC_msg },
745 { CHAFSR_EMC, CHAFSR_EMC_msg },
746 { CHAFSR_WDC, CHAFSR_WDC_msg },
747 { CHAFSR_CPC, CHAFSR_CPC_msg },
748 { CHAFSR_TO, CHAFSR_TO_msg },
749 { CHAFSR_BERR, CHAFSR_BERR_msg },
750 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
751 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
752 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
753 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
754 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
755 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
756 /* These two do not update the AFAR. */
757 { CHAFSR_IVC, CHAFSR_IVC_msg },
758 { CHAFSR_IVU, CHAFSR_IVU_msg },
761 static const char JPAFSR_JETO_msg[] =
762 "System interface protocol error, hw timeout caused";
763 static const char JPAFSR_SCE_msg[] =
764 "Parity error on system snoop results";
765 static const char JPAFSR_JEIC_msg[] =
766 "System interface protocol error, illegal command detected";
767 static const char JPAFSR_JEIT_msg[] =
768 "System interface protocol error, illegal ADTYPE detected";
769 static const char JPAFSR_OM_msg[] =
770 "Out of range memory error has occurred";
771 static const char JPAFSR_ETP_msg[] =
772 "Parity error on L2 cache tag SRAM";
773 static const char JPAFSR_UMS_msg[] =
774 "Error due to unsupported store";
775 static const char JPAFSR_RUE_msg[] =
776 "Uncorrectable ECC error from remote cache/memory";
777 static const char JPAFSR_RCE_msg[] =
778 "Correctable ECC error from remote cache/memory";
779 static const char JPAFSR_BP_msg[] =
780 "JBUS parity error on returned read data";
781 static const char JPAFSR_WBP_msg[] =
782 "JBUS parity error on data for writeback or block store";
783 static const char JPAFSR_FRC_msg[] =
784 "Foreign read to DRAM incurring correctable ECC error";
785 static const char JPAFSR_FRU_msg[] =
786 "Foreign read to DRAM incurring uncorrectable ECC error";
787 static struct afsr_error_table __jalapeno_error_table[] = {
788 { JPAFSR_JETO, JPAFSR_JETO_msg },
789 { JPAFSR_SCE, JPAFSR_SCE_msg },
790 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
791 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
792 { CHAFSR_PERR, CHAFSR_PERR_msg },
793 { CHAFSR_IERR, CHAFSR_IERR_msg },
794 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
795 { CHAFSR_UCU, CHAFSR_UCU_msg },
796 { CHAFSR_UCC, CHAFSR_UCC_msg },
797 { CHAFSR_UE, CHAFSR_UE_msg },
798 { CHAFSR_EDU, CHAFSR_EDU_msg },
799 { JPAFSR_OM, JPAFSR_OM_msg },
800 { CHAFSR_WDU, CHAFSR_WDU_msg },
801 { CHAFSR_CPU, CHAFSR_CPU_msg },
802 { CHAFSR_CE, CHAFSR_CE_msg },
803 { CHAFSR_EDC, CHAFSR_EDC_msg },
804 { JPAFSR_ETP, JPAFSR_ETP_msg },
805 { CHAFSR_WDC, CHAFSR_WDC_msg },
806 { CHAFSR_CPC, CHAFSR_CPC_msg },
807 { CHAFSR_TO, CHAFSR_TO_msg },
808 { CHAFSR_BERR, CHAFSR_BERR_msg },
809 { JPAFSR_UMS, JPAFSR_UMS_msg },
810 { JPAFSR_RUE, JPAFSR_RUE_msg },
811 { JPAFSR_RCE, JPAFSR_RCE_msg },
812 { JPAFSR_BP, JPAFSR_BP_msg },
813 { JPAFSR_WBP, JPAFSR_WBP_msg },
814 { JPAFSR_FRC, JPAFSR_FRC_msg },
815 { JPAFSR_FRU, JPAFSR_FRU_msg },
816 /* These two do not update the AFAR. */
817 { CHAFSR_IVU, CHAFSR_IVU_msg },
820 static struct afsr_error_table *cheetah_error_table;
821 static unsigned long cheetah_afsr_errors;
823 struct cheetah_err_info *cheetah_error_log;
825 static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
827 struct cheetah_err_info *p;
828 int cpu = smp_processor_id();
830 if (!cheetah_error_log)
833 p = cheetah_error_log + (cpu * 2);
834 if ((afsr & CHAFSR_TL1) != 0UL)
840 extern unsigned int tl0_icpe[], tl1_icpe[];
841 extern unsigned int tl0_dcpe[], tl1_dcpe[];
842 extern unsigned int tl0_fecc[], tl1_fecc[];
843 extern unsigned int tl0_cee[], tl1_cee[];
844 extern unsigned int tl0_iae[], tl1_iae[];
845 extern unsigned int tl0_dae[], tl1_dae[];
846 extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
847 extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
848 extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
849 extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
850 extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
852 void __init cheetah_ecache_flush_init(void)
854 unsigned long largest_size, smallest_linesize, order, ver;
857 /* Scan all cpu device tree nodes, note two values:
858 * 1) largest E-cache size
859 * 2) smallest E-cache line size
862 smallest_linesize = ~0UL;
864 for (i = 0; i < NR_CPUS; i++) {
867 val = cpu_data(i).ecache_size;
871 if (val > largest_size)
874 val = cpu_data(i).ecache_line_size;
875 if (val < smallest_linesize)
876 smallest_linesize = val;
880 if (largest_size == 0UL || smallest_linesize == ~0UL) {
881 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
886 ecache_flush_size = (2 * largest_size);
887 ecache_flush_linesize = smallest_linesize;
889 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
891 if (ecache_flush_physbase == ~0UL) {
892 prom_printf("cheetah_ecache_flush_init: Cannot find %ld byte "
893 "contiguous physical memory.\n",
898 /* Now allocate error trap reporting scoreboard. */
899 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
900 for (order = 0; order < MAX_ORDER; order++) {
901 if ((PAGE_SIZE << order) >= sz)
904 cheetah_error_log = (struct cheetah_err_info *)
905 __get_free_pages(GFP_KERNEL, order);
906 if (!cheetah_error_log) {
907 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
908 "error logging scoreboard (%d bytes).\n", sz);
911 memset(cheetah_error_log, 0, PAGE_SIZE << order);
913 /* Mark all AFSRs as invalid so that the trap handler will
914 * log new new information there.
916 for (i = 0; i < 2 * NR_CPUS; i++)
917 cheetah_error_log[i].afsr = CHAFSR_INVALID;
919 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
920 if ((ver >> 32) == __JALAPENO_ID ||
921 (ver >> 32) == __SERRANO_ID) {
922 cheetah_error_table = &__jalapeno_error_table[0];
923 cheetah_afsr_errors = JPAFSR_ERRORS;
924 } else if ((ver >> 32) == 0x003e0015) {
925 cheetah_error_table = &__cheetah_plus_error_table[0];
926 cheetah_afsr_errors = CHPAFSR_ERRORS;
928 cheetah_error_table = &__cheetah_error_table[0];
929 cheetah_afsr_errors = CHAFSR_ERRORS;
932 /* Now patch trap tables. */
933 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
934 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
935 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
936 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
937 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
938 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
939 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
940 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
941 if (tlb_type == cheetah_plus) {
942 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
943 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
944 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
945 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
950 static void cheetah_flush_ecache(void)
952 unsigned long flush_base = ecache_flush_physbase;
953 unsigned long flush_linesize = ecache_flush_linesize;
954 unsigned long flush_size = ecache_flush_size;
956 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
957 " bne,pt %%xcc, 1b\n\t"
958 " ldxa [%2 + %0] %3, %%g0\n\t"
960 : "0" (flush_size), "r" (flush_base),
961 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
964 static void cheetah_flush_ecache_line(unsigned long physaddr)
968 physaddr &= ~(8UL - 1UL);
969 physaddr = (ecache_flush_physbase +
970 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
971 alias = physaddr + (ecache_flush_size >> 1UL);
972 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
973 "ldxa [%1] %2, %%g0\n\t"
976 : "r" (physaddr), "r" (alias),
977 "i" (ASI_PHYS_USE_EC));
980 /* Unfortunately, the diagnostic access to the I-cache tags we need to
981 * use to clear the thing interferes with I-cache coherency transactions.
983 * So we must only flush the I-cache when it is disabled.
985 static void __cheetah_flush_icache(void)
987 unsigned int icache_size, icache_line_size;
990 icache_size = local_cpu_data().icache_size;
991 icache_line_size = local_cpu_data().icache_line_size;
993 /* Clear the valid bits in all the tags. */
994 for (addr = 0; addr < icache_size; addr += icache_line_size) {
995 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
998 : "r" (addr | (2 << 3)),
1003 static void cheetah_flush_icache(void)
1005 unsigned long dcu_save;
1007 /* Save current DCU, disable I-cache. */
1008 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1009 "or %0, %2, %%g1\n\t"
1010 "stxa %%g1, [%%g0] %1\n\t"
1013 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
1016 __cheetah_flush_icache();
1018 /* Restore DCU register */
1019 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1022 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
1025 static void cheetah_flush_dcache(void)
1027 unsigned int dcache_size, dcache_line_size;
1030 dcache_size = local_cpu_data().dcache_size;
1031 dcache_line_size = local_cpu_data().dcache_line_size;
1033 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1034 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
1037 : "r" (addr), "i" (ASI_DCACHE_TAG));
1041 /* In order to make the even parity correct we must do two things.
1042 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
1043 * Next, we clear out all 32-bytes of data for that line. Data of
1044 * all-zero + tag parity value of zero == correct parity.
1046 static void cheetah_plus_zap_dcache_parity(void)
1048 unsigned int dcache_size, dcache_line_size;
1051 dcache_size = local_cpu_data().dcache_size;
1052 dcache_line_size = local_cpu_data().dcache_line_size;
1054 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1055 unsigned long tag = (addr >> 14);
1058 __asm__ __volatile__("membar #Sync\n\t"
1059 "stxa %0, [%1] %2\n\t"
1062 : "r" (tag), "r" (addr),
1063 "i" (ASI_DCACHE_UTAG));
1064 for (line = addr; line < addr + dcache_line_size; line += 8)
1065 __asm__ __volatile__("membar #Sync\n\t"
1066 "stxa %%g0, [%0] %1\n\t"
1070 "i" (ASI_DCACHE_DATA));
1074 /* Conversion tables used to frob Cheetah AFSR syndrome values into
1075 * something palatable to the memory controller driver get_unumber
1099 static unsigned char cheetah_ecc_syntab[] = {
1100 /*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1101 /*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1102 /*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1103 /*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1104 /*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1105 /*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1106 /*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1107 /*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1108 /*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1109 /*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1110 /*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1111 /*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1112 /*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1113 /*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1114 /*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1115 /*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1116 /*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1117 /*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1118 /*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1119 /*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1120 /*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1121 /*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1122 /*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1123 /*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1124 /*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1125 /*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1126 /*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1127 /*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1128 /*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1129 /*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1130 /*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1131 /*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1133 static unsigned char cheetah_mtag_syntab[] = {
1144 /* Return the highest priority error conditon mentioned. */
1145 static inline unsigned long cheetah_get_hipri(unsigned long afsr)
1147 unsigned long tmp = 0;
1150 for (i = 0; cheetah_error_table[i].mask; i++) {
1151 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1157 static const char *cheetah_get_string(unsigned long bit)
1161 for (i = 0; cheetah_error_table[i].mask; i++) {
1162 if ((bit & cheetah_error_table[i].mask) != 0UL)
1163 return cheetah_error_table[i].name;
1168 static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1169 unsigned long afsr, unsigned long afar, int recoverable)
1171 unsigned long hipri;
1174 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1175 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1177 (afsr & CHAFSR_TL1) ? 1 : 0);
1178 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1179 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1180 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1181 printk("%s" "ERROR(%d): ",
1182 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1183 printk("TPC<%pS>\n", (void *) regs->tpc);
1184 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1185 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1186 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1187 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1188 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1189 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1190 hipri = cheetah_get_hipri(afsr);
1191 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1192 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1193 hipri, cheetah_get_string(hipri));
1195 /* Try to get unumber if relevant. */
1196 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1197 CHAFSR_CPC | CHAFSR_CPU | \
1198 CHAFSR_UE | CHAFSR_CE | \
1199 CHAFSR_EDC | CHAFSR_EDU | \
1200 CHAFSR_UCC | CHAFSR_UCU | \
1201 CHAFSR_WDU | CHAFSR_WDC)
1202 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1203 if (afsr & ESYND_ERRORS) {
1207 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1208 syndrome = cheetah_ecc_syntab[syndrome];
1209 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1211 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1212 (recoverable ? KERN_WARNING : KERN_CRIT),
1213 smp_processor_id(), unum);
1214 } else if (afsr & MSYND_ERRORS) {
1218 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1219 syndrome = cheetah_mtag_syntab[syndrome];
1220 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1222 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1223 (recoverable ? KERN_WARNING : KERN_CRIT),
1224 smp_processor_id(), unum);
1227 /* Now dump the cache snapshots. */
1228 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx]\n",
1229 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1230 (int) info->dcache_index,
1234 printk("%s" "ERROR(%d): D-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1235 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1236 info->dcache_data[0],
1237 info->dcache_data[1],
1238 info->dcache_data[2],
1239 info->dcache_data[3]);
1240 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx] "
1241 "u[%016llx] l[%016llx]\n",
1242 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1243 (int) info->icache_index,
1248 info->icache_lower);
1249 printk("%s" "ERROR(%d): I-cache INSN0[%016llx] INSN1[%016llx] INSN2[%016llx] INSN3[%016llx]\n",
1250 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1251 info->icache_data[0],
1252 info->icache_data[1],
1253 info->icache_data[2],
1254 info->icache_data[3]);
1255 printk("%s" "ERROR(%d): I-cache INSN4[%016llx] INSN5[%016llx] INSN6[%016llx] INSN7[%016llx]\n",
1256 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1257 info->icache_data[4],
1258 info->icache_data[5],
1259 info->icache_data[6],
1260 info->icache_data[7]);
1261 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016llx]\n",
1262 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1263 (int) info->ecache_index, info->ecache_tag);
1264 printk("%s" "ERROR(%d): E-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1265 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1266 info->ecache_data[0],
1267 info->ecache_data[1],
1268 info->ecache_data[2],
1269 info->ecache_data[3]);
1271 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1272 while (afsr != 0UL) {
1273 unsigned long bit = cheetah_get_hipri(afsr);
1275 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1276 (recoverable ? KERN_WARNING : KERN_CRIT),
1277 bit, cheetah_get_string(bit));
1283 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1286 static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1288 unsigned long afsr, afar;
1291 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1294 if ((afsr & cheetah_afsr_errors) != 0) {
1296 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1304 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1306 : : "r" (afsr), "i" (ASI_AFSR));
1311 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1313 struct cheetah_err_info local_snapshot, *p;
1317 cheetah_flush_ecache();
1319 p = cheetah_get_error_log(afsr);
1321 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1323 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1324 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1328 /* Grab snapshot of logged error. */
1329 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1331 /* If the current trap snapshot does not match what the
1332 * trap handler passed along into our args, big trouble.
1333 * In such a case, mark the local copy as invalid.
1335 * Else, it matches and we mark the afsr in the non-local
1336 * copy as invalid so we may log new error traps there.
1338 if (p->afsr != afsr || p->afar != afar)
1339 local_snapshot.afsr = CHAFSR_INVALID;
1341 p->afsr = CHAFSR_INVALID;
1343 cheetah_flush_icache();
1344 cheetah_flush_dcache();
1346 /* Re-enable I-cache/D-cache */
1347 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1348 "or %%g1, %1, %%g1\n\t"
1349 "stxa %%g1, [%%g0] %0\n\t"
1352 : "i" (ASI_DCU_CONTROL_REG),
1353 "i" (DCU_DC | DCU_IC)
1356 /* Re-enable error reporting */
1357 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1358 "or %%g1, %1, %%g1\n\t"
1359 "stxa %%g1, [%%g0] %0\n\t"
1362 : "i" (ASI_ESTATE_ERROR_EN),
1363 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1366 /* Decide if we can continue after handling this trap and
1367 * logging the error.
1370 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1373 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1374 * error was logged while we had error reporting traps disabled.
1376 if (cheetah_recheck_errors(&local_snapshot)) {
1377 unsigned long new_afsr = local_snapshot.afsr;
1379 /* If we got a new asynchronous error, die... */
1380 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1381 CHAFSR_WDU | CHAFSR_CPU |
1382 CHAFSR_IVU | CHAFSR_UE |
1383 CHAFSR_BERR | CHAFSR_TO))
1388 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1391 panic("Irrecoverable Fast-ECC error trap.\n");
1393 /* Flush E-cache to kick the error trap handlers out. */
1394 cheetah_flush_ecache();
1397 /* Try to fix a correctable error by pushing the line out from
1398 * the E-cache. Recheck error reporting registers to see if the
1399 * problem is intermittent.
1401 static int cheetah_fix_ce(unsigned long physaddr)
1403 unsigned long orig_estate;
1404 unsigned long alias1, alias2;
1407 /* Make sure correctable error traps are disabled. */
1408 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1409 "andn %0, %1, %%g1\n\t"
1410 "stxa %%g1, [%%g0] %2\n\t"
1412 : "=&r" (orig_estate)
1413 : "i" (ESTATE_ERROR_CEEN),
1414 "i" (ASI_ESTATE_ERROR_EN)
1417 /* We calculate alias addresses that will force the
1418 * cache line in question out of the E-cache. Then
1419 * we bring it back in with an atomic instruction so
1420 * that we get it in some modified/exclusive state,
1421 * then we displace it again to try and get proper ECC
1422 * pushed back into the system.
1424 physaddr &= ~(8UL - 1UL);
1425 alias1 = (ecache_flush_physbase +
1426 (physaddr & ((ecache_flush_size >> 1) - 1)));
1427 alias2 = alias1 + (ecache_flush_size >> 1);
1428 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1429 "ldxa [%1] %3, %%g0\n\t"
1430 "casxa [%2] %3, %%g0, %%g0\n\t"
1431 "ldxa [%0] %3, %%g0\n\t"
1432 "ldxa [%1] %3, %%g0\n\t"
1435 : "r" (alias1), "r" (alias2),
1436 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1438 /* Did that trigger another error? */
1439 if (cheetah_recheck_errors(NULL)) {
1440 /* Try one more time. */
1441 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1443 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1444 if (cheetah_recheck_errors(NULL))
1449 /* No new error, intermittent problem. */
1453 /* Restore error enables. */
1454 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1456 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1461 /* Return non-zero if PADDR is a valid physical memory address. */
1462 static int cheetah_check_main_memory(unsigned long paddr)
1464 unsigned long vaddr = PAGE_OFFSET + paddr;
1466 if (vaddr > (unsigned long) high_memory)
1469 return kern_addr_valid(vaddr);
1472 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1474 struct cheetah_err_info local_snapshot, *p;
1475 int recoverable, is_memory;
1477 p = cheetah_get_error_log(afsr);
1479 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1481 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1482 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1486 /* Grab snapshot of logged error. */
1487 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1489 /* If the current trap snapshot does not match what the
1490 * trap handler passed along into our args, big trouble.
1491 * In such a case, mark the local copy as invalid.
1493 * Else, it matches and we mark the afsr in the non-local
1494 * copy as invalid so we may log new error traps there.
1496 if (p->afsr != afsr || p->afar != afar)
1497 local_snapshot.afsr = CHAFSR_INVALID;
1499 p->afsr = CHAFSR_INVALID;
1501 is_memory = cheetah_check_main_memory(afar);
1503 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1504 /* XXX Might want to log the results of this operation
1505 * XXX somewhere... -DaveM
1507 cheetah_fix_ce(afar);
1511 int flush_all, flush_line;
1513 flush_all = flush_line = 0;
1514 if ((afsr & CHAFSR_EDC) != 0UL) {
1515 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1519 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1520 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1526 /* Trap handler only disabled I-cache, flush it. */
1527 cheetah_flush_icache();
1529 /* Re-enable I-cache */
1530 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1531 "or %%g1, %1, %%g1\n\t"
1532 "stxa %%g1, [%%g0] %0\n\t"
1535 : "i" (ASI_DCU_CONTROL_REG),
1540 cheetah_flush_ecache();
1541 else if (flush_line)
1542 cheetah_flush_ecache_line(afar);
1545 /* Re-enable error reporting */
1546 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1547 "or %%g1, %1, %%g1\n\t"
1548 "stxa %%g1, [%%g0] %0\n\t"
1551 : "i" (ASI_ESTATE_ERROR_EN),
1552 "i" (ESTATE_ERROR_CEEN)
1555 /* Decide if we can continue after handling this trap and
1556 * logging the error.
1559 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1562 /* Re-check AFSR/AFAR */
1563 (void) cheetah_recheck_errors(&local_snapshot);
1566 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1569 panic("Irrecoverable Correctable-ECC error trap.\n");
1572 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1574 struct cheetah_err_info local_snapshot, *p;
1575 int recoverable, is_memory;
1578 /* Check for the special PCI poke sequence. */
1579 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1580 cheetah_flush_icache();
1581 cheetah_flush_dcache();
1583 /* Re-enable I-cache/D-cache */
1584 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1585 "or %%g1, %1, %%g1\n\t"
1586 "stxa %%g1, [%%g0] %0\n\t"
1589 : "i" (ASI_DCU_CONTROL_REG),
1590 "i" (DCU_DC | DCU_IC)
1593 /* Re-enable error reporting */
1594 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1595 "or %%g1, %1, %%g1\n\t"
1596 "stxa %%g1, [%%g0] %0\n\t"
1599 : "i" (ASI_ESTATE_ERROR_EN),
1600 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1603 (void) cheetah_recheck_errors(NULL);
1605 pci_poke_faulted = 1;
1607 regs->tnpc = regs->tpc + 4;
1612 p = cheetah_get_error_log(afsr);
1614 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1616 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1617 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1621 /* Grab snapshot of logged error. */
1622 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1624 /* If the current trap snapshot does not match what the
1625 * trap handler passed along into our args, big trouble.
1626 * In such a case, mark the local copy as invalid.
1628 * Else, it matches and we mark the afsr in the non-local
1629 * copy as invalid so we may log new error traps there.
1631 if (p->afsr != afsr || p->afar != afar)
1632 local_snapshot.afsr = CHAFSR_INVALID;
1634 p->afsr = CHAFSR_INVALID;
1636 is_memory = cheetah_check_main_memory(afar);
1639 int flush_all, flush_line;
1641 flush_all = flush_line = 0;
1642 if ((afsr & CHAFSR_EDU) != 0UL) {
1643 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1647 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1648 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1654 cheetah_flush_icache();
1655 cheetah_flush_dcache();
1657 /* Re-enable I/D caches */
1658 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1659 "or %%g1, %1, %%g1\n\t"
1660 "stxa %%g1, [%%g0] %0\n\t"
1663 : "i" (ASI_DCU_CONTROL_REG),
1664 "i" (DCU_IC | DCU_DC)
1668 cheetah_flush_ecache();
1669 else if (flush_line)
1670 cheetah_flush_ecache_line(afar);
1673 /* Re-enable error reporting */
1674 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1675 "or %%g1, %1, %%g1\n\t"
1676 "stxa %%g1, [%%g0] %0\n\t"
1679 : "i" (ASI_ESTATE_ERROR_EN),
1680 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1683 /* Decide if we can continue after handling this trap and
1684 * logging the error.
1687 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1690 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1691 * error was logged while we had error reporting traps disabled.
1693 if (cheetah_recheck_errors(&local_snapshot)) {
1694 unsigned long new_afsr = local_snapshot.afsr;
1696 /* If we got a new asynchronous error, die... */
1697 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1698 CHAFSR_WDU | CHAFSR_CPU |
1699 CHAFSR_IVU | CHAFSR_UE |
1700 CHAFSR_BERR | CHAFSR_TO))
1705 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1707 /* "Recoverable" here means we try to yank the page from ever
1708 * being newly used again. This depends upon a few things:
1709 * 1) Must be main memory, and AFAR must be valid.
1710 * 2) If we trapped from user, OK.
1711 * 3) Else, if we trapped from kernel we must find exception
1712 * table entry (ie. we have to have been accessing user
1715 * If AFAR is not in main memory, or we trapped from kernel
1716 * and cannot find an exception table entry, it is unacceptable
1717 * to try and continue.
1719 if (recoverable && is_memory) {
1720 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1721 /* OK, usermode access. */
1724 const struct exception_table_entry *entry;
1726 entry = search_exception_tables(regs->tpc);
1728 /* OK, kernel access to userspace. */
1732 /* BAD, privileged state is corrupted. */
1737 if (pfn_valid(afar >> PAGE_SHIFT))
1738 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1742 /* Only perform fixup if we still have a
1743 * recoverable condition.
1746 regs->tpc = entry->fixup;
1747 regs->tnpc = regs->tpc + 4;
1756 panic("Irrecoverable deferred error trap.\n");
1759 /* Handle a D/I cache parity error trap. TYPE is encoded as:
1761 * Bit0: 0=dcache,1=icache
1762 * Bit1: 0=recoverable,1=unrecoverable
1764 * The hardware has disabled both the I-cache and D-cache in
1765 * the %dcr register.
1767 void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1770 __cheetah_flush_icache();
1772 cheetah_plus_zap_dcache_parity();
1773 cheetah_flush_dcache();
1775 /* Re-enable I-cache/D-cache */
1776 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1777 "or %%g1, %1, %%g1\n\t"
1778 "stxa %%g1, [%%g0] %0\n\t"
1781 : "i" (ASI_DCU_CONTROL_REG),
1782 "i" (DCU_DC | DCU_IC)
1786 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1788 (type & 0x1) ? 'I' : 'D',
1790 printk(KERN_EMERG "TPC<%pS>\n", (void *) regs->tpc);
1791 panic("Irrecoverable Cheetah+ parity error.");
1794 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1796 (type & 0x1) ? 'I' : 'D',
1798 printk(KERN_WARNING "TPC<%pS>\n", (void *) regs->tpc);
1801 struct sun4v_error_entry {
1802 /* Unique error handle */
1803 /*0x00*/u64 err_handle;
1805 /* %stick value at the time of the error */
1806 /*0x08*/u64 err_stick;
1808 /*0x10*/u8 reserved_1[3];
1811 /*0x13*/u8 err_type;
1812 #define SUN4V_ERR_TYPE_UNDEFINED 0
1813 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1814 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1815 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1816 #define SUN4V_ERR_TYPE_SHUTDOWN_RQST 4
1817 #define SUN4V_ERR_TYPE_DUMP_CORE 5
1818 #define SUN4V_ERR_TYPE_SP_STATE_CHANGE 6
1819 #define SUN4V_ERR_TYPE_NUM 7
1821 /* Error attributes */
1822 /*0x14*/u32 err_attrs;
1823 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1824 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1825 #define SUN4V_ERR_ATTRS_PIO 0x00000004
1826 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1827 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1828 #define SUN4V_ERR_ATTRS_SHUTDOWN_RQST 0x00000020
1829 #define SUN4V_ERR_ATTRS_ASR 0x00000040
1830 #define SUN4V_ERR_ATTRS_ASI 0x00000080
1831 #define SUN4V_ERR_ATTRS_PRIV_REG 0x00000100
1832 #define SUN4V_ERR_ATTRS_SPSTATE_MSK 0x00000600
1833 #define SUN4V_ERR_ATTRS_MCD 0x00000800
1834 #define SUN4V_ERR_ATTRS_SPSTATE_SHFT 9
1835 #define SUN4V_ERR_ATTRS_MODE_MSK 0x03000000
1836 #define SUN4V_ERR_ATTRS_MODE_SHFT 24
1837 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1839 #define SUN4V_ERR_SPSTATE_FAULTED 0
1840 #define SUN4V_ERR_SPSTATE_AVAILABLE 1
1841 #define SUN4V_ERR_SPSTATE_NOT_PRESENT 2
1843 #define SUN4V_ERR_MODE_USER 1
1844 #define SUN4V_ERR_MODE_PRIV 2
1846 /* Real address of the memory region or PIO transaction */
1847 /*0x18*/u64 err_raddr;
1849 /* Size of the operation triggering the error, in bytes */
1850 /*0x20*/u32 err_size;
1853 /*0x24*/u16 err_cpu;
1855 /* Grace periof for shutdown, in seconds */
1856 /*0x26*/u16 err_secs;
1858 /* Value of the %asi register */
1861 /*0x29*/u8 reserved_2;
1863 /* Value of the ASR register number */
1864 /*0x2a*/u16 err_asr;
1865 #define SUN4V_ERR_ASR_VALID 0x8000
1867 /*0x2c*/u32 reserved_3;
1868 /*0x30*/u64 reserved_4;
1869 /*0x38*/u64 reserved_5;
1872 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1873 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1875 static const char *sun4v_err_type_to_str(u8 type)
1877 static const char *types[SUN4V_ERR_TYPE_NUM] = {
1879 "uncorrected resumable",
1880 "precise nonresumable",
1881 "deferred nonresumable",
1887 if (type < SUN4V_ERR_TYPE_NUM)
1893 static void sun4v_emit_err_attr_strings(u32 attrs)
1895 static const char *attr_names[] = {
1906 static const char *sp_states[] = {
1910 "sp-state-reserved",
1912 static const char *modes[] = {
1921 for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
1922 if (attrs & (1U << i)) {
1923 const char *s = attr_names[i];
1929 sp_state = ((attrs & SUN4V_ERR_ATTRS_SPSTATE_MSK) >>
1930 SUN4V_ERR_ATTRS_SPSTATE_SHFT);
1931 pr_cont("%s ", sp_states[sp_state]);
1933 mode = ((attrs & SUN4V_ERR_ATTRS_MODE_MSK) >>
1934 SUN4V_ERR_ATTRS_MODE_SHFT);
1935 pr_cont("%s ", modes[mode]);
1937 if (attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL)
1938 pr_cont("res-queue-full ");
1941 /* When the report contains a real-address of "-1" it means that the
1942 * hardware did not provide the address. So we compute the effective
1943 * address of the load or store instruction at regs->tpc and report
1944 * that. Usually when this happens it's a PIO and in such a case we
1945 * are using physical addresses with bypass ASIs anyways, so what we
1946 * report here is exactly what we want.
1948 static void sun4v_report_real_raddr(const char *pfx, struct pt_regs *regs)
1953 if (!(regs->tstate & TSTATE_PRIV))
1956 insn = *(unsigned int *) regs->tpc;
1958 addr = compute_effective_address(regs, insn, 0);
1960 printk("%s: insn effective address [0x%016llx]\n",
1964 static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent,
1965 int cpu, const char *pfx, atomic_t *ocnt)
1967 u64 *raw_ptr = (u64 *) ent;
1971 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1972 printk("%s: TPC [0x%016lx] <%pS>\n",
1973 pfx, regs->tpc, (void *) regs->tpc);
1975 printk("%s: RAW [%016llx:%016llx:%016llx:%016llx\n",
1976 pfx, raw_ptr[0], raw_ptr[1], raw_ptr[2], raw_ptr[3]);
1977 printk("%s: %016llx:%016llx:%016llx:%016llx]\n",
1978 pfx, raw_ptr[4], raw_ptr[5], raw_ptr[6], raw_ptr[7]);
1980 printk("%s: handle [0x%016llx] stick [0x%016llx]\n",
1981 pfx, ent->err_handle, ent->err_stick);
1983 printk("%s: type [%s]\n", pfx, sun4v_err_type_to_str(ent->err_type));
1985 attrs = ent->err_attrs;
1986 printk("%s: attrs [0x%08x] < ", pfx, attrs);
1987 sun4v_emit_err_attr_strings(attrs);
1990 /* Various fields in the error report are only valid if
1991 * certain attribute bits are set.
1993 if (attrs & (SUN4V_ERR_ATTRS_MEMORY |
1994 SUN4V_ERR_ATTRS_PIO |
1995 SUN4V_ERR_ATTRS_ASI)) {
1996 printk("%s: raddr [0x%016llx]\n", pfx, ent->err_raddr);
1998 if (ent->err_raddr == ~(u64)0)
1999 sun4v_report_real_raddr(pfx, regs);
2002 if (attrs & (SUN4V_ERR_ATTRS_MEMORY | SUN4V_ERR_ATTRS_ASI))
2003 printk("%s: size [0x%x]\n", pfx, ent->err_size);
2005 if (attrs & (SUN4V_ERR_ATTRS_PROCESSOR |
2006 SUN4V_ERR_ATTRS_INT_REGISTERS |
2007 SUN4V_ERR_ATTRS_FPU_REGISTERS |
2008 SUN4V_ERR_ATTRS_PRIV_REG))
2009 printk("%s: cpu[%u]\n", pfx, ent->err_cpu);
2011 if (attrs & SUN4V_ERR_ATTRS_ASI)
2012 printk("%s: asi [0x%02x]\n", pfx, ent->err_asi);
2014 if ((attrs & (SUN4V_ERR_ATTRS_INT_REGISTERS |
2015 SUN4V_ERR_ATTRS_FPU_REGISTERS |
2016 SUN4V_ERR_ATTRS_PRIV_REG)) &&
2017 (ent->err_asr & SUN4V_ERR_ASR_VALID) != 0)
2018 printk("%s: reg [0x%04x]\n",
2019 pfx, ent->err_asr & ~SUN4V_ERR_ASR_VALID);
2023 if ((cnt = atomic_read(ocnt)) != 0) {
2024 atomic_set(ocnt, 0);
2026 printk("%s: Queue overflowed %d times.\n",
2031 /* Handle memory corruption detected error which is vectored in
2032 * through resumable error trap.
2034 void do_mcd_err(struct pt_regs *regs, struct sun4v_error_entry ent)
2036 if (notify_die(DIE_TRAP, "MCD error", regs, 0, 0x34,
2037 SIGSEGV) == NOTIFY_STOP)
2040 if (regs->tstate & TSTATE_PRIV) {
2041 /* MCD exception could happen because the task was
2042 * running a system call with MCD enabled and passed a
2043 * non-versioned pointer or pointer with bad version
2044 * tag to the system call. In such cases, hypervisor
2045 * places the address of offending instruction in the
2046 * resumable error report. This is a deferred error,
2047 * so the read/write that caused the trap was potentially
2048 * retired long time back and we may have no choice
2049 * but to send SIGSEGV to the process.
2051 const struct exception_table_entry *entry;
2053 entry = search_exception_tables(regs->tpc);
2055 /* Looks like a bad syscall parameter */
2056 #ifdef DEBUG_EXCEPTIONS
2057 pr_emerg("Exception: PC<%016lx> faddr<UNKNOWN>\n",
2059 pr_emerg("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
2060 ent.err_raddr, entry->fixup);
2062 regs->tpc = entry->fixup;
2063 regs->tnpc = regs->tpc + 4;
2068 /* Send SIGSEGV to the userspace process with the right signal
2071 force_sig_fault(SIGSEGV, SEGV_ADIDERR, (void __user *)ent.err_raddr);
2074 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
2075 * Log the event and clear the first word of the entry.
2077 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
2079 enum ctx_state prev_state = exception_enter();
2080 struct sun4v_error_entry *ent, local_copy;
2081 struct trap_per_cpu *tb;
2082 unsigned long paddr;
2087 tb = &trap_block[cpu];
2088 paddr = tb->resum_kernel_buf_pa + offset;
2091 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
2093 /* We have a local copy now, so release the entry. */
2094 ent->err_handle = 0;
2099 if (local_copy.err_type == SUN4V_ERR_TYPE_SHUTDOWN_RQST) {
2100 /* We should really take the seconds field of
2101 * the error report and use it for the shutdown
2102 * invocation, but for now do the same thing we
2103 * do for a DS shutdown request.
2105 pr_info("Shutdown request, %u seconds...\n",
2106 local_copy.err_secs);
2107 orderly_poweroff(true);
2111 /* If this is a memory corruption detected error vectored in
2112 * by HV through resumable error trap, call the handler
2114 if (local_copy.err_attrs & SUN4V_ERR_ATTRS_MCD) {
2115 do_mcd_err(regs, local_copy);
2119 sun4v_log_error(regs, &local_copy, cpu,
2120 KERN_ERR "RESUMABLE ERROR",
2121 &sun4v_resum_oflow_cnt);
2123 exception_exit(prev_state);
2126 /* If we try to printk() we'll probably make matters worse, by trying
2127 * to retake locks this cpu already holds or causing more errors. So
2128 * just bump a counter, and we'll report these counter bumps above.
2130 void sun4v_resum_overflow(struct pt_regs *regs)
2132 atomic_inc(&sun4v_resum_oflow_cnt);
2135 /* Given a set of registers, get the virtual addressi that was being accessed
2136 * by the faulting instructions at tpc.
2138 static unsigned long sun4v_get_vaddr(struct pt_regs *regs)
2142 if (!copy_from_user(&insn, (void __user *)regs->tpc, 4)) {
2143 return compute_effective_address(regs, insn,
2144 (insn >> 25) & 0x1f);
2149 /* Attempt to handle non-resumable errors generated from userspace.
2150 * Returns true if the signal was handled, false otherwise.
2152 bool sun4v_nonresum_error_user_handled(struct pt_regs *regs,
2153 struct sun4v_error_entry *ent) {
2155 unsigned int attrs = ent->err_attrs;
2157 if (attrs & SUN4V_ERR_ATTRS_MEMORY) {
2158 unsigned long addr = ent->err_raddr;
2160 if (addr == ~(u64)0) {
2161 /* This seems highly unlikely to ever occur */
2162 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Memory error detected in unknown location!\n");
2164 unsigned long page_cnt = DIV_ROUND_UP(ent->err_size,
2167 /* Break the unfortunate news. */
2168 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Memory failed at %016lX\n",
2170 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Claiming %lu ages.\n",
2173 while (page_cnt-- > 0) {
2174 if (pfn_valid(addr >> PAGE_SHIFT))
2175 get_page(pfn_to_page(addr >> PAGE_SHIFT));
2183 if (attrs & SUN4V_ERR_ATTRS_PIO) {
2184 force_sig_fault(SIGBUS, BUS_ADRERR,
2185 (void __user *)sun4v_get_vaddr(regs));
2189 /* Default to doing nothing */
2193 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
2194 * Log the event, clear the first word of the entry, and die.
2196 void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
2198 struct sun4v_error_entry *ent, local_copy;
2199 struct trap_per_cpu *tb;
2200 unsigned long paddr;
2205 tb = &trap_block[cpu];
2206 paddr = tb->nonresum_kernel_buf_pa + offset;
2209 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
2211 /* We have a local copy now, so release the entry. */
2212 ent->err_handle = 0;
2217 if (!(regs->tstate & TSTATE_PRIV) &&
2218 sun4v_nonresum_error_user_handled(regs, &local_copy)) {
2219 /* DON'T PANIC: This userspace error was handled. */
2224 /* Check for the special PCI poke sequence. */
2225 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
2226 pci_poke_faulted = 1;
2228 regs->tnpc = regs->tpc + 4;
2233 sun4v_log_error(regs, &local_copy, cpu,
2234 KERN_EMERG "NON-RESUMABLE ERROR",
2235 &sun4v_nonresum_oflow_cnt);
2237 panic("Non-resumable error.");
2240 /* If we try to printk() we'll probably make matters worse, by trying
2241 * to retake locks this cpu already holds or causing more errors. So
2242 * just bump a counter, and we'll report these counter bumps above.
2244 void sun4v_nonresum_overflow(struct pt_regs *regs)
2246 /* XXX Actually even this can make not that much sense. Perhaps
2247 * XXX we should just pull the plug and panic directly from here?
2249 atomic_inc(&sun4v_nonresum_oflow_cnt);
2252 static void sun4v_tlb_error(struct pt_regs *regs)
2254 die_if_kernel("TLB/TSB error", regs);
2257 unsigned long sun4v_err_itlb_vaddr;
2258 unsigned long sun4v_err_itlb_ctx;
2259 unsigned long sun4v_err_itlb_pte;
2260 unsigned long sun4v_err_itlb_error;
2262 void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
2264 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2266 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
2268 printk(KERN_EMERG "SUN4V-ITLB: TPC<%pS>\n", (void *) regs->tpc);
2269 printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
2270 printk(KERN_EMERG "SUN4V-ITLB: O7<%pS>\n",
2271 (void *) regs->u_regs[UREG_I7]);
2272 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
2273 "pte[%lx] error[%lx]\n",
2274 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
2275 sun4v_err_itlb_pte, sun4v_err_itlb_error);
2277 sun4v_tlb_error(regs);
2280 unsigned long sun4v_err_dtlb_vaddr;
2281 unsigned long sun4v_err_dtlb_ctx;
2282 unsigned long sun4v_err_dtlb_pte;
2283 unsigned long sun4v_err_dtlb_error;
2285 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
2287 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2289 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
2291 printk(KERN_EMERG "SUN4V-DTLB: TPC<%pS>\n", (void *) regs->tpc);
2292 printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
2293 printk(KERN_EMERG "SUN4V-DTLB: O7<%pS>\n",
2294 (void *) regs->u_regs[UREG_I7]);
2295 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
2296 "pte[%lx] error[%lx]\n",
2297 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
2298 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
2300 sun4v_tlb_error(regs);
2303 void hypervisor_tlbop_error(unsigned long err, unsigned long op)
2305 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
2309 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
2311 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
2315 static void do_fpe_common(struct pt_regs *regs)
2317 if (regs->tstate & TSTATE_PRIV) {
2318 regs->tpc = regs->tnpc;
2321 unsigned long fsr = current_thread_info()->xfsr[0];
2324 if (test_thread_flag(TIF_32BIT)) {
2325 regs->tpc &= 0xffffffff;
2326 regs->tnpc &= 0xffffffff;
2329 if ((fsr & 0x1c000) == (1 << 14)) {
2332 else if (fsr & 0x08)
2334 else if (fsr & 0x04)
2336 else if (fsr & 0x02)
2338 else if (fsr & 0x01)
2341 force_sig_fault(SIGFPE, code, (void __user *)regs->tpc);
2345 void do_fpieee(struct pt_regs *regs)
2347 enum ctx_state prev_state = exception_enter();
2349 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2350 0, 0x24, SIGFPE) == NOTIFY_STOP)
2353 do_fpe_common(regs);
2355 exception_exit(prev_state);
2358 void do_fpother(struct pt_regs *regs)
2360 enum ctx_state prev_state = exception_enter();
2361 struct fpustate *f = FPUSTATE;
2364 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2365 0, 0x25, SIGFPE) == NOTIFY_STOP)
2368 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2369 case (2 << 14): /* unfinished_FPop */
2370 case (3 << 14): /* unimplemented_FPop */
2371 ret = do_mathemu(regs, f, false);
2376 do_fpe_common(regs);
2378 exception_exit(prev_state);
2381 void do_tof(struct pt_regs *regs)
2383 enum ctx_state prev_state = exception_enter();
2385 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2386 0, 0x26, SIGEMT) == NOTIFY_STOP)
2389 if (regs->tstate & TSTATE_PRIV)
2390 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2391 if (test_thread_flag(TIF_32BIT)) {
2392 regs->tpc &= 0xffffffff;
2393 regs->tnpc &= 0xffffffff;
2395 force_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)regs->tpc);
2397 exception_exit(prev_state);
2400 void do_div0(struct pt_regs *regs)
2402 enum ctx_state prev_state = exception_enter();
2404 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2405 0, 0x28, SIGFPE) == NOTIFY_STOP)
2408 if (regs->tstate & TSTATE_PRIV)
2409 die_if_kernel("TL0: Kernel divide by zero.", regs);
2410 if (test_thread_flag(TIF_32BIT)) {
2411 regs->tpc &= 0xffffffff;
2412 regs->tnpc &= 0xffffffff;
2414 force_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)regs->tpc);
2416 exception_exit(prev_state);
2419 static void instruction_dump(unsigned int *pc)
2423 if ((((unsigned long) pc) & 3))
2426 printk("Instruction DUMP:");
2427 for (i = -3; i < 6; i++)
2428 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2432 static void user_instruction_dump(unsigned int __user *pc)
2435 unsigned int buf[9];
2437 if ((((unsigned long) pc) & 3))
2440 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2443 printk("Instruction DUMP:");
2444 for (i = 0; i < 9; i++)
2445 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2449 void show_stack(struct task_struct *tsk, unsigned long *_ksp, const char *loglvl)
2451 unsigned long fp, ksp;
2452 struct thread_info *tp;
2454 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
2458 ksp = (unsigned long) _ksp;
2461 tp = task_thread_info(tsk);
2464 asm("mov %%fp, %0" : "=r" (ksp));
2468 if (tp == current_thread_info())
2471 fp = ksp + STACK_BIAS;
2473 printk("%sCall Trace:\n", loglvl);
2475 struct sparc_stackf *sf;
2476 struct pt_regs *regs;
2479 if (!kstack_valid(tp, fp))
2481 sf = (struct sparc_stackf *) fp;
2482 regs = (struct pt_regs *) (sf + 1);
2484 if (kstack_is_trap_frame(tp, regs)) {
2485 if (!(regs->tstate & TSTATE_PRIV))
2488 fp = regs->u_regs[UREG_I6] + STACK_BIAS;
2490 pc = sf->callers_pc;
2491 fp = (unsigned long)sf->fp + STACK_BIAS;
2494 print_ip_sym(loglvl, pc);
2495 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
2496 if ((pc + 8UL) == (unsigned long) &return_to_handler) {
2497 struct ftrace_ret_stack *ret_stack;
2498 ret_stack = ftrace_graph_get_ret_stack(tsk, graph);
2500 pc = ret_stack->ret;
2501 print_ip_sym(loglvl, pc);
2506 } while (++count < 16);
2509 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2511 unsigned long fp = rw->ins[6];
2516 return (struct reg_window *) (fp + STACK_BIAS);
2519 void __noreturn die_if_kernel(char *str, struct pt_regs *regs)
2521 static int die_counter;
2524 /* Amuse the user. */
2527 " \"@'/ .. \\`@\"\n"
2531 printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
2532 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2533 __asm__ __volatile__("flushw");
2535 add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
2536 if (regs->tstate & TSTATE_PRIV) {
2537 struct thread_info *tp = current_thread_info();
2538 struct reg_window *rw = (struct reg_window *)
2539 (regs->u_regs[UREG_FP] + STACK_BIAS);
2541 /* Stop the back trace when we hit userland or we
2542 * find some badly aligned kernel stack.
2546 kstack_valid(tp, (unsigned long) rw)) {
2547 printk("Caller[%016lx]: %pS\n", rw->ins[7],
2548 (void *) rw->ins[7]);
2550 rw = kernel_stack_up(rw);
2552 instruction_dump ((unsigned int *) regs->tpc);
2554 if (test_thread_flag(TIF_32BIT)) {
2555 regs->tpc &= 0xffffffff;
2556 regs->tnpc &= 0xffffffff;
2558 user_instruction_dump ((unsigned int __user *) regs->tpc);
2561 panic("Fatal exception");
2562 make_task_dead((regs->tstate & TSTATE_PRIV)? SIGKILL : SIGSEGV);
2564 EXPORT_SYMBOL(die_if_kernel);
2566 #define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2567 #define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2569 void do_illegal_instruction(struct pt_regs *regs)
2571 enum ctx_state prev_state = exception_enter();
2572 unsigned long pc = regs->tpc;
2573 unsigned long tstate = regs->tstate;
2576 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2577 0, 0x10, SIGILL) == NOTIFY_STOP)
2580 if (tstate & TSTATE_PRIV)
2581 die_if_kernel("Kernel illegal instruction", regs);
2582 if (test_thread_flag(TIF_32BIT))
2584 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2585 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2586 if (handle_popc(insn, regs))
2588 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2589 if (handle_ldf_stq(insn, regs))
2591 } else if (tlb_type == hypervisor) {
2592 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2593 if (!vis_emul(regs, insn))
2596 struct fpustate *f = FPUSTATE;
2598 /* On UltraSPARC T2 and later, FPU insns which
2599 * are not implemented in HW signal an illegal
2600 * instruction trap and do not set the FP Trap
2601 * Trap in the %fsr to unimplemented_FPop.
2603 if (do_mathemu(regs, f, true))
2608 force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc);
2610 exception_exit(prev_state);
2613 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2615 enum ctx_state prev_state = exception_enter();
2617 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2618 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2621 if (regs->tstate & TSTATE_PRIV) {
2622 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2625 if (is_no_fault_exception(regs))
2628 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)sfar);
2630 exception_exit(prev_state);
2633 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2635 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2636 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2639 if (regs->tstate & TSTATE_PRIV) {
2640 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2643 if (is_no_fault_exception(regs))
2646 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) addr);
2649 /* sun4v_mem_corrupt_detect_precise() - Handle precise exception on an ADI
2652 * ADI version tag mismatch on a load from memory always results in a
2653 * precise exception. Tag mismatch on a store to memory will result in
2654 * precise exception if MCDPER or PMCDPER is set to 1.
2656 void sun4v_mem_corrupt_detect_precise(struct pt_regs *regs, unsigned long addr,
2657 unsigned long context)
2659 if (notify_die(DIE_TRAP, "memory corruption precise exception", regs,
2660 0, 0x8, SIGSEGV) == NOTIFY_STOP)
2663 if (regs->tstate & TSTATE_PRIV) {
2664 /* MCD exception could happen because the task was running
2665 * a system call with MCD enabled and passed a non-versioned
2666 * pointer or pointer with bad version tag to the system
2669 const struct exception_table_entry *entry;
2671 entry = search_exception_tables(regs->tpc);
2673 /* Looks like a bad syscall parameter */
2674 #ifdef DEBUG_EXCEPTIONS
2675 pr_emerg("Exception: PC<%016lx> faddr<UNKNOWN>\n",
2677 pr_emerg("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
2678 regs->tpc, entry->fixup);
2680 regs->tpc = entry->fixup;
2681 regs->tnpc = regs->tpc + 4;
2684 pr_emerg("%s: ADDR[%016lx] CTX[%lx], going.\n",
2685 __func__, addr, context);
2686 die_if_kernel("MCD precise", regs);
2689 if (test_thread_flag(TIF_32BIT)) {
2690 regs->tpc &= 0xffffffff;
2691 regs->tnpc &= 0xffffffff;
2693 force_sig_fault(SIGSEGV, SEGV_ADIPERR, (void __user *)addr);
2696 void do_privop(struct pt_regs *regs)
2698 enum ctx_state prev_state = exception_enter();
2700 if (notify_die(DIE_TRAP, "privileged operation", regs,
2701 0, 0x11, SIGILL) == NOTIFY_STOP)
2704 if (test_thread_flag(TIF_32BIT)) {
2705 regs->tpc &= 0xffffffff;
2706 regs->tnpc &= 0xffffffff;
2708 force_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)regs->tpc);
2710 exception_exit(prev_state);
2713 void do_privact(struct pt_regs *regs)
2718 /* Trap level 1 stuff or other traps we should never see... */
2719 void do_cee(struct pt_regs *regs)
2722 die_if_kernel("TL0: Cache Error Exception", regs);
2725 void do_div0_tl1(struct pt_regs *regs)
2728 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2729 die_if_kernel("TL1: DIV0 Exception", regs);
2732 void do_fpieee_tl1(struct pt_regs *regs)
2735 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2736 die_if_kernel("TL1: FPU IEEE Exception", regs);
2739 void do_fpother_tl1(struct pt_regs *regs)
2742 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2743 die_if_kernel("TL1: FPU Other Exception", regs);
2746 void do_ill_tl1(struct pt_regs *regs)
2749 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2750 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2753 void do_irq_tl1(struct pt_regs *regs)
2756 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2757 die_if_kernel("TL1: IRQ Exception", regs);
2760 void do_lddfmna_tl1(struct pt_regs *regs)
2763 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2764 die_if_kernel("TL1: LDDF Exception", regs);
2767 void do_stdfmna_tl1(struct pt_regs *regs)
2770 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2771 die_if_kernel("TL1: STDF Exception", regs);
2774 void do_paw(struct pt_regs *regs)
2777 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2780 void do_paw_tl1(struct pt_regs *regs)
2783 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2784 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2787 void do_vaw(struct pt_regs *regs)
2790 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2793 void do_vaw_tl1(struct pt_regs *regs)
2796 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2797 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2800 void do_tof_tl1(struct pt_regs *regs)
2803 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2804 die_if_kernel("TL1: Tag Overflow Exception", regs);
2807 void do_getpsr(struct pt_regs *regs)
2809 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2810 regs->tpc = regs->tnpc;
2812 if (test_thread_flag(TIF_32BIT)) {
2813 regs->tpc &= 0xffffffff;
2814 regs->tnpc &= 0xffffffff;
2818 u64 cpu_mondo_counter[NR_CPUS] = {0};
2819 struct trap_per_cpu trap_block[NR_CPUS];
2820 EXPORT_SYMBOL(trap_block);
2822 /* This can get invoked before sched_init() so play it super safe
2823 * and use hard_smp_processor_id().
2825 void notrace init_cur_cpu_trap(struct thread_info *t)
2827 int cpu = hard_smp_processor_id();
2828 struct trap_per_cpu *p = &trap_block[cpu];
2834 extern void thread_info_offsets_are_bolixed_dave(void);
2835 extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2836 extern void tsb_config_offsets_are_bolixed_dave(void);
2838 /* Only invoked on boot processor. */
2839 void __init trap_init(void)
2841 /* Compile time sanity check. */
2842 BUILD_BUG_ON(TI_TASK != offsetof(struct thread_info, task) ||
2843 TI_FLAGS != offsetof(struct thread_info, flags) ||
2844 TI_CPU != offsetof(struct thread_info, cpu) ||
2845 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2846 TI_KSP != offsetof(struct thread_info, ksp) ||
2847 TI_FAULT_ADDR != offsetof(struct thread_info,
2849 TI_KREGS != offsetof(struct thread_info, kregs) ||
2850 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2851 TI_REG_WINDOW != offsetof(struct thread_info,
2853 TI_RWIN_SPTRS != offsetof(struct thread_info,
2855 TI_GSR != offsetof(struct thread_info, gsr) ||
2856 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2857 TI_PRE_COUNT != offsetof(struct thread_info,
2859 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2860 TI_KUNA_REGS != offsetof(struct thread_info,
2862 TI_KUNA_INSN != offsetof(struct thread_info,
2864 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2865 (TI_FPREGS & (64 - 1)));
2867 BUILD_BUG_ON(TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu,
2869 (TRAP_PER_CPU_PGD_PADDR !=
2870 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2871 (TRAP_PER_CPU_CPU_MONDO_PA !=
2872 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2873 (TRAP_PER_CPU_DEV_MONDO_PA !=
2874 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2875 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2876 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2877 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2878 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2879 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2880 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2881 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2882 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2883 (TRAP_PER_CPU_FAULT_INFO !=
2884 offsetof(struct trap_per_cpu, fault_info)) ||
2885 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2886 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2887 (TRAP_PER_CPU_CPU_LIST_PA !=
2888 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2889 (TRAP_PER_CPU_TSB_HUGE !=
2890 offsetof(struct trap_per_cpu, tsb_huge)) ||
2891 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2892 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2893 (TRAP_PER_CPU_IRQ_WORKLIST_PA !=
2894 offsetof(struct trap_per_cpu, irq_worklist_pa)) ||
2895 (TRAP_PER_CPU_CPU_MONDO_QMASK !=
2896 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) ||
2897 (TRAP_PER_CPU_DEV_MONDO_QMASK !=
2898 offsetof(struct trap_per_cpu, dev_mondo_qmask)) ||
2899 (TRAP_PER_CPU_RESUM_QMASK !=
2900 offsetof(struct trap_per_cpu, resum_qmask)) ||
2901 (TRAP_PER_CPU_NONRESUM_QMASK !=
2902 offsetof(struct trap_per_cpu, nonresum_qmask)) ||
2903 (TRAP_PER_CPU_PER_CPU_BASE !=
2904 offsetof(struct trap_per_cpu, __per_cpu_base)));
2906 BUILD_BUG_ON((TSB_CONFIG_TSB !=
2907 offsetof(struct tsb_config, tsb)) ||
2908 (TSB_CONFIG_RSS_LIMIT !=
2909 offsetof(struct tsb_config, tsb_rss_limit)) ||
2910 (TSB_CONFIG_NENTRIES !=
2911 offsetof(struct tsb_config, tsb_nentries)) ||
2912 (TSB_CONFIG_REG_VAL !=
2913 offsetof(struct tsb_config, tsb_reg_val)) ||
2914 (TSB_CONFIG_MAP_VADDR !=
2915 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2916 (TSB_CONFIG_MAP_PTE !=
2917 offsetof(struct tsb_config, tsb_map_pte)));
2919 /* Attach to the address space of init_task. On SMP we
2920 * do this in smp.c:smp_callin for other cpus.
2923 current->active_mm = &init_mm;