1 /* arch/sparc64/kernel/traps.c
3 * Copyright (C) 1995,1997 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com)
8 * I like traps on v9, :))))
11 #include <linux/module.h>
12 #include <linux/sched.h>
13 #include <linux/kernel.h>
14 #include <linux/kallsyms.h>
15 #include <linux/signal.h>
16 #include <linux/smp.h>
18 #include <linux/init.h>
19 #include <linux/kdebug.h>
22 #include <asm/delay.h>
23 #include <asm/system.h>
24 #include <asm/ptrace.h>
25 #include <asm/oplib.h>
27 #include <asm/pgtable.h>
28 #include <asm/unistd.h>
29 #include <asm/uaccess.h>
30 #include <asm/fpumacro.h>
33 #include <asm/estate.h>
34 #include <asm/chafsr.h>
35 #include <asm/sfafsr.h>
36 #include <asm/psrcompat.h>
37 #include <asm/processor.h>
38 #include <asm/timer.h>
41 #include <linux/kmod.h>
46 /* When an irrecoverable trap occurs at tl > 0, the trap entry
47 * code logs the trap state registers at every level in the trap
48 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
61 static void dump_tl1_traplog(struct tl1_traplog *p)
65 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
66 "dumping track stack.\n", p->tl);
68 limit = (tlb_type == hypervisor) ? 2 : 4;
69 for (i = 0; i < limit; i++) {
71 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
72 "TNPC[%016lx] TT[%lx]\n",
74 p->trapstack[i].tstate, p->trapstack[i].tpc,
75 p->trapstack[i].tnpc, p->trapstack[i].tt);
76 print_symbol("TRAPLOG: TPC<%s>\n", p->trapstack[i].tpc);
80 void do_call_debug(struct pt_regs *regs)
82 notify_die(DIE_CALL, "debug call", regs, 0, 255, SIGINT);
85 void bad_trap(struct pt_regs *regs, long lvl)
90 if (notify_die(DIE_TRAP, "bad trap", regs,
91 0, lvl, SIGTRAP) == NOTIFY_STOP)
95 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
96 die_if_kernel(buffer, regs);
100 if (regs->tstate & TSTATE_PRIV) {
101 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
102 die_if_kernel(buffer, regs);
104 if (test_thread_flag(TIF_32BIT)) {
105 regs->tpc &= 0xffffffff;
106 regs->tnpc &= 0xffffffff;
108 info.si_signo = SIGILL;
110 info.si_code = ILL_ILLTRP;
111 info.si_addr = (void __user *)regs->tpc;
112 info.si_trapno = lvl;
113 force_sig_info(SIGILL, &info, current);
116 void bad_trap_tl1(struct pt_regs *regs, long lvl)
120 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
121 0, lvl, SIGTRAP) == NOTIFY_STOP)
124 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
126 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
127 die_if_kernel (buffer, regs);
130 #ifdef CONFIG_DEBUG_BUGVERBOSE
131 void do_BUG(const char *file, int line)
134 printk("kernel BUG at %s:%d!\n", file, line);
138 void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
142 if (notify_die(DIE_TRAP, "instruction access exception", regs,
143 0, 0x8, SIGTRAP) == NOTIFY_STOP)
146 if (regs->tstate & TSTATE_PRIV) {
147 printk("spitfire_insn_access_exception: SFSR[%016lx] "
148 "SFAR[%016lx], going.\n", sfsr, sfar);
149 die_if_kernel("Iax", regs);
151 if (test_thread_flag(TIF_32BIT)) {
152 regs->tpc &= 0xffffffff;
153 regs->tnpc &= 0xffffffff;
155 info.si_signo = SIGSEGV;
157 info.si_code = SEGV_MAPERR;
158 info.si_addr = (void __user *)regs->tpc;
160 force_sig_info(SIGSEGV, &info, current);
163 void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
165 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
166 0, 0x8, SIGTRAP) == NOTIFY_STOP)
169 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
170 spitfire_insn_access_exception(regs, sfsr, sfar);
173 void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
175 unsigned short type = (type_ctx >> 16);
176 unsigned short ctx = (type_ctx & 0xffff);
179 if (notify_die(DIE_TRAP, "instruction access exception", regs,
180 0, 0x8, SIGTRAP) == NOTIFY_STOP)
183 if (regs->tstate & TSTATE_PRIV) {
184 printk("sun4v_insn_access_exception: ADDR[%016lx] "
185 "CTX[%04x] TYPE[%04x], going.\n",
187 die_if_kernel("Iax", regs);
190 if (test_thread_flag(TIF_32BIT)) {
191 regs->tpc &= 0xffffffff;
192 regs->tnpc &= 0xffffffff;
194 info.si_signo = SIGSEGV;
196 info.si_code = SEGV_MAPERR;
197 info.si_addr = (void __user *) addr;
199 force_sig_info(SIGSEGV, &info, current);
202 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
204 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
205 0, 0x8, SIGTRAP) == NOTIFY_STOP)
208 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
209 sun4v_insn_access_exception(regs, addr, type_ctx);
212 void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
216 if (notify_die(DIE_TRAP, "data access exception", regs,
217 0, 0x30, SIGTRAP) == NOTIFY_STOP)
220 if (regs->tstate & TSTATE_PRIV) {
221 /* Test if this comes from uaccess places. */
222 const struct exception_table_entry *entry;
224 entry = search_exception_tables(regs->tpc);
226 /* Ouch, somebody is trying VM hole tricks on us... */
227 #ifdef DEBUG_EXCEPTIONS
228 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
229 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
230 regs->tpc, entry->fixup);
232 regs->tpc = entry->fixup;
233 regs->tnpc = regs->tpc + 4;
237 printk("spitfire_data_access_exception: SFSR[%016lx] "
238 "SFAR[%016lx], going.\n", sfsr, sfar);
239 die_if_kernel("Dax", regs);
242 info.si_signo = SIGSEGV;
244 info.si_code = SEGV_MAPERR;
245 info.si_addr = (void __user *)sfar;
247 force_sig_info(SIGSEGV, &info, current);
250 void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
252 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
253 0, 0x30, SIGTRAP) == NOTIFY_STOP)
256 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
257 spitfire_data_access_exception(regs, sfsr, sfar);
260 void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
262 unsigned short type = (type_ctx >> 16);
263 unsigned short ctx = (type_ctx & 0xffff);
266 if (notify_die(DIE_TRAP, "data access exception", regs,
267 0, 0x8, SIGTRAP) == NOTIFY_STOP)
270 if (regs->tstate & TSTATE_PRIV) {
271 printk("sun4v_data_access_exception: ADDR[%016lx] "
272 "CTX[%04x] TYPE[%04x], going.\n",
274 die_if_kernel("Dax", regs);
277 if (test_thread_flag(TIF_32BIT)) {
278 regs->tpc &= 0xffffffff;
279 regs->tnpc &= 0xffffffff;
281 info.si_signo = SIGSEGV;
283 info.si_code = SEGV_MAPERR;
284 info.si_addr = (void __user *) addr;
286 force_sig_info(SIGSEGV, &info, current);
289 void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
291 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
292 0, 0x8, SIGTRAP) == NOTIFY_STOP)
295 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
296 sun4v_data_access_exception(regs, addr, type_ctx);
300 /* This is really pathetic... */
301 extern volatile int pci_poke_in_progress;
302 extern volatile int pci_poke_cpu;
303 extern volatile int pci_poke_faulted;
306 /* When access exceptions happen, we must do this. */
307 static void spitfire_clean_and_reenable_l1_caches(void)
311 if (tlb_type != spitfire)
315 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
316 spitfire_put_icache_tag(va, 0x0);
317 spitfire_put_dcache_tag(va, 0x0);
320 /* Re-enable in LSU. */
321 __asm__ __volatile__("flush %%g6\n\t"
323 "stxa %0, [%%g0] %1\n\t"
326 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
327 LSU_CONTROL_IM | LSU_CONTROL_DM),
328 "i" (ASI_LSU_CONTROL)
332 static void spitfire_enable_estate_errors(void)
334 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
337 : "r" (ESTATE_ERR_ALL),
338 "i" (ASI_ESTATE_ERROR_EN));
341 static char ecc_syndrome_table[] = {
342 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
343 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
344 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
345 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
346 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
347 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
348 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
349 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
350 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
351 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
352 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
353 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
354 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
355 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
356 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
357 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
358 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
359 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
360 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
361 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
362 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
363 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
364 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
365 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
366 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
367 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
368 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
369 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
370 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
371 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
372 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
373 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
376 static char *syndrome_unknown = "<Unknown>";
378 static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
380 unsigned short scode;
381 char memmod_str[64], *p;
384 scode = ecc_syndrome_table[udbl & 0xff];
385 if (prom_getunumber(scode, afar,
386 memmod_str, sizeof(memmod_str)) == -1)
387 p = syndrome_unknown;
390 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
391 "Memory Module \"%s\"\n",
392 smp_processor_id(), scode, p);
396 scode = ecc_syndrome_table[udbh & 0xff];
397 if (prom_getunumber(scode, afar,
398 memmod_str, sizeof(memmod_str)) == -1)
399 p = syndrome_unknown;
402 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
403 "Memory Module \"%s\"\n",
404 smp_processor_id(), scode, p);
409 static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
412 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
413 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
414 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
416 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
418 /* We always log it, even if someone is listening for this
421 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
422 0, TRAP_TYPE_CEE, SIGTRAP);
424 /* The Correctable ECC Error trap does not disable I/D caches. So
425 * we only have to restore the ESTATE Error Enable register.
427 spitfire_enable_estate_errors();
430 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)
434 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
435 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
436 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
438 /* XXX add more human friendly logging of the error status
439 * XXX as is implemented for cheetah
442 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
444 /* We always log it, even if someone is listening for this
447 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
450 if (regs->tstate & TSTATE_PRIV) {
452 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
453 die_if_kernel("UE", regs);
456 /* XXX need more intelligent processing here, such as is implemented
457 * XXX for cheetah errors, in fact if the E-cache still holds the
458 * XXX line with bad parity this will loop
461 spitfire_clean_and_reenable_l1_caches();
462 spitfire_enable_estate_errors();
464 if (test_thread_flag(TIF_32BIT)) {
465 regs->tpc &= 0xffffffff;
466 regs->tnpc &= 0xffffffff;
468 info.si_signo = SIGBUS;
470 info.si_code = BUS_OBJERR;
471 info.si_addr = (void *)0;
473 force_sig_info(SIGBUS, &info, current);
476 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
478 unsigned long afsr, tt, udbh, udbl;
481 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
482 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
483 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
484 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
485 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
488 if (tt == TRAP_TYPE_DAE &&
489 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
490 spitfire_clean_and_reenable_l1_caches();
491 spitfire_enable_estate_errors();
493 pci_poke_faulted = 1;
494 regs->tnpc = regs->tpc + 4;
499 if (afsr & SFAFSR_UE)
500 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
502 if (tt == TRAP_TYPE_CEE) {
503 /* Handle the case where we took a CEE trap, but ACK'd
504 * only the UE state in the UDB error registers.
506 if (afsr & SFAFSR_UE) {
507 if (udbh & UDBE_CE) {
508 __asm__ __volatile__(
509 "stxa %0, [%1] %2\n\t"
512 : "r" (udbh & UDBE_CE),
513 "r" (0x0), "i" (ASI_UDB_ERROR_W));
515 if (udbl & UDBE_CE) {
516 __asm__ __volatile__(
517 "stxa %0, [%1] %2\n\t"
520 : "r" (udbl & UDBE_CE),
521 "r" (0x18), "i" (ASI_UDB_ERROR_W));
525 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
529 int cheetah_pcache_forced_on;
531 void cheetah_enable_pcache(void)
535 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
538 __asm__ __volatile__("ldxa [%%g0] %1, %0"
540 : "i" (ASI_DCU_CONTROL_REG));
541 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
542 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
545 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
548 /* Cheetah error trap handling. */
549 static unsigned long ecache_flush_physbase;
550 static unsigned long ecache_flush_linesize;
551 static unsigned long ecache_flush_size;
553 /* WARNING: The error trap handlers in assembly know the precise
554 * layout of the following structure.
556 * C-level handlers below use this information to log the error
557 * and then determine how to recover (if possible).
559 struct cheetah_err_info {
564 /*0x10*/u64 dcache_data[4]; /* The actual data */
565 /*0x30*/u64 dcache_index; /* D-cache index */
566 /*0x38*/u64 dcache_tag; /* D-cache tag/valid */
567 /*0x40*/u64 dcache_utag; /* D-cache microtag */
568 /*0x48*/u64 dcache_stag; /* D-cache snooptag */
571 /*0x50*/u64 icache_data[8]; /* The actual insns + predecode */
572 /*0x90*/u64 icache_index; /* I-cache index */
573 /*0x98*/u64 icache_tag; /* I-cache phys tag */
574 /*0xa0*/u64 icache_utag; /* I-cache microtag */
575 /*0xa8*/u64 icache_stag; /* I-cache snooptag */
576 /*0xb0*/u64 icache_upper; /* I-cache upper-tag */
577 /*0xb8*/u64 icache_lower; /* I-cache lower-tag */
580 /*0xc0*/u64 ecache_data[4]; /* 32 bytes from staging registers */
581 /*0xe0*/u64 ecache_index; /* E-cache index */
582 /*0xe8*/u64 ecache_tag; /* E-cache tag/state */
584 /*0xf0*/u64 __pad[32 - 30];
586 #define CHAFSR_INVALID ((u64)-1L)
588 /* This table is ordered in priority of errors and matches the
589 * AFAR overwrite policy as well.
592 struct afsr_error_table {
597 static const char CHAFSR_PERR_msg[] =
598 "System interface protocol error";
599 static const char CHAFSR_IERR_msg[] =
600 "Internal processor error";
601 static const char CHAFSR_ISAP_msg[] =
602 "System request parity error on incoming addresss";
603 static const char CHAFSR_UCU_msg[] =
604 "Uncorrectable E-cache ECC error for ifetch/data";
605 static const char CHAFSR_UCC_msg[] =
606 "SW Correctable E-cache ECC error for ifetch/data";
607 static const char CHAFSR_UE_msg[] =
608 "Uncorrectable system bus data ECC error for read";
609 static const char CHAFSR_EDU_msg[] =
610 "Uncorrectable E-cache ECC error for stmerge/blkld";
611 static const char CHAFSR_EMU_msg[] =
612 "Uncorrectable system bus MTAG error";
613 static const char CHAFSR_WDU_msg[] =
614 "Uncorrectable E-cache ECC error for writeback";
615 static const char CHAFSR_CPU_msg[] =
616 "Uncorrectable ECC error for copyout";
617 static const char CHAFSR_CE_msg[] =
618 "HW corrected system bus data ECC error for read";
619 static const char CHAFSR_EDC_msg[] =
620 "HW corrected E-cache ECC error for stmerge/blkld";
621 static const char CHAFSR_EMC_msg[] =
622 "HW corrected system bus MTAG ECC error";
623 static const char CHAFSR_WDC_msg[] =
624 "HW corrected E-cache ECC error for writeback";
625 static const char CHAFSR_CPC_msg[] =
626 "HW corrected ECC error for copyout";
627 static const char CHAFSR_TO_msg[] =
628 "Unmapped error from system bus";
629 static const char CHAFSR_BERR_msg[] =
630 "Bus error response from system bus";
631 static const char CHAFSR_IVC_msg[] =
632 "HW corrected system bus data ECC error for ivec read";
633 static const char CHAFSR_IVU_msg[] =
634 "Uncorrectable system bus data ECC error for ivec read";
635 static struct afsr_error_table __cheetah_error_table[] = {
636 { CHAFSR_PERR, CHAFSR_PERR_msg },
637 { CHAFSR_IERR, CHAFSR_IERR_msg },
638 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
639 { CHAFSR_UCU, CHAFSR_UCU_msg },
640 { CHAFSR_UCC, CHAFSR_UCC_msg },
641 { CHAFSR_UE, CHAFSR_UE_msg },
642 { CHAFSR_EDU, CHAFSR_EDU_msg },
643 { CHAFSR_EMU, CHAFSR_EMU_msg },
644 { CHAFSR_WDU, CHAFSR_WDU_msg },
645 { CHAFSR_CPU, CHAFSR_CPU_msg },
646 { CHAFSR_CE, CHAFSR_CE_msg },
647 { CHAFSR_EDC, CHAFSR_EDC_msg },
648 { CHAFSR_EMC, CHAFSR_EMC_msg },
649 { CHAFSR_WDC, CHAFSR_WDC_msg },
650 { CHAFSR_CPC, CHAFSR_CPC_msg },
651 { CHAFSR_TO, CHAFSR_TO_msg },
652 { CHAFSR_BERR, CHAFSR_BERR_msg },
653 /* These two do not update the AFAR. */
654 { CHAFSR_IVC, CHAFSR_IVC_msg },
655 { CHAFSR_IVU, CHAFSR_IVU_msg },
658 static const char CHPAFSR_DTO_msg[] =
659 "System bus unmapped error for prefetch/storequeue-read";
660 static const char CHPAFSR_DBERR_msg[] =
661 "System bus error for prefetch/storequeue-read";
662 static const char CHPAFSR_THCE_msg[] =
663 "Hardware corrected E-cache Tag ECC error";
664 static const char CHPAFSR_TSCE_msg[] =
665 "SW handled correctable E-cache Tag ECC error";
666 static const char CHPAFSR_TUE_msg[] =
667 "Uncorrectable E-cache Tag ECC error";
668 static const char CHPAFSR_DUE_msg[] =
669 "System bus uncorrectable data ECC error due to prefetch/store-fill";
670 static struct afsr_error_table __cheetah_plus_error_table[] = {
671 { CHAFSR_PERR, CHAFSR_PERR_msg },
672 { CHAFSR_IERR, CHAFSR_IERR_msg },
673 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
674 { CHAFSR_UCU, CHAFSR_UCU_msg },
675 { CHAFSR_UCC, CHAFSR_UCC_msg },
676 { CHAFSR_UE, CHAFSR_UE_msg },
677 { CHAFSR_EDU, CHAFSR_EDU_msg },
678 { CHAFSR_EMU, CHAFSR_EMU_msg },
679 { CHAFSR_WDU, CHAFSR_WDU_msg },
680 { CHAFSR_CPU, CHAFSR_CPU_msg },
681 { CHAFSR_CE, CHAFSR_CE_msg },
682 { CHAFSR_EDC, CHAFSR_EDC_msg },
683 { CHAFSR_EMC, CHAFSR_EMC_msg },
684 { CHAFSR_WDC, CHAFSR_WDC_msg },
685 { CHAFSR_CPC, CHAFSR_CPC_msg },
686 { CHAFSR_TO, CHAFSR_TO_msg },
687 { CHAFSR_BERR, CHAFSR_BERR_msg },
688 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
689 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
690 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
691 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
692 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
693 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
694 /* These two do not update the AFAR. */
695 { CHAFSR_IVC, CHAFSR_IVC_msg },
696 { CHAFSR_IVU, CHAFSR_IVU_msg },
699 static const char JPAFSR_JETO_msg[] =
700 "System interface protocol error, hw timeout caused";
701 static const char JPAFSR_SCE_msg[] =
702 "Parity error on system snoop results";
703 static const char JPAFSR_JEIC_msg[] =
704 "System interface protocol error, illegal command detected";
705 static const char JPAFSR_JEIT_msg[] =
706 "System interface protocol error, illegal ADTYPE detected";
707 static const char JPAFSR_OM_msg[] =
708 "Out of range memory error has occurred";
709 static const char JPAFSR_ETP_msg[] =
710 "Parity error on L2 cache tag SRAM";
711 static const char JPAFSR_UMS_msg[] =
712 "Error due to unsupported store";
713 static const char JPAFSR_RUE_msg[] =
714 "Uncorrectable ECC error from remote cache/memory";
715 static const char JPAFSR_RCE_msg[] =
716 "Correctable ECC error from remote cache/memory";
717 static const char JPAFSR_BP_msg[] =
718 "JBUS parity error on returned read data";
719 static const char JPAFSR_WBP_msg[] =
720 "JBUS parity error on data for writeback or block store";
721 static const char JPAFSR_FRC_msg[] =
722 "Foreign read to DRAM incurring correctable ECC error";
723 static const char JPAFSR_FRU_msg[] =
724 "Foreign read to DRAM incurring uncorrectable ECC error";
725 static struct afsr_error_table __jalapeno_error_table[] = {
726 { JPAFSR_JETO, JPAFSR_JETO_msg },
727 { JPAFSR_SCE, JPAFSR_SCE_msg },
728 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
729 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
730 { CHAFSR_PERR, CHAFSR_PERR_msg },
731 { CHAFSR_IERR, CHAFSR_IERR_msg },
732 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
733 { CHAFSR_UCU, CHAFSR_UCU_msg },
734 { CHAFSR_UCC, CHAFSR_UCC_msg },
735 { CHAFSR_UE, CHAFSR_UE_msg },
736 { CHAFSR_EDU, CHAFSR_EDU_msg },
737 { JPAFSR_OM, JPAFSR_OM_msg },
738 { CHAFSR_WDU, CHAFSR_WDU_msg },
739 { CHAFSR_CPU, CHAFSR_CPU_msg },
740 { CHAFSR_CE, CHAFSR_CE_msg },
741 { CHAFSR_EDC, CHAFSR_EDC_msg },
742 { JPAFSR_ETP, JPAFSR_ETP_msg },
743 { CHAFSR_WDC, CHAFSR_WDC_msg },
744 { CHAFSR_CPC, CHAFSR_CPC_msg },
745 { CHAFSR_TO, CHAFSR_TO_msg },
746 { CHAFSR_BERR, CHAFSR_BERR_msg },
747 { JPAFSR_UMS, JPAFSR_UMS_msg },
748 { JPAFSR_RUE, JPAFSR_RUE_msg },
749 { JPAFSR_RCE, JPAFSR_RCE_msg },
750 { JPAFSR_BP, JPAFSR_BP_msg },
751 { JPAFSR_WBP, JPAFSR_WBP_msg },
752 { JPAFSR_FRC, JPAFSR_FRC_msg },
753 { JPAFSR_FRU, JPAFSR_FRU_msg },
754 /* These two do not update the AFAR. */
755 { CHAFSR_IVU, CHAFSR_IVU_msg },
758 static struct afsr_error_table *cheetah_error_table;
759 static unsigned long cheetah_afsr_errors;
761 /* This is allocated at boot time based upon the largest hardware
762 * cpu ID in the system. We allocate two entries per cpu, one for
763 * TL==0 logging and one for TL >= 1 logging.
765 struct cheetah_err_info *cheetah_error_log;
767 static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
769 struct cheetah_err_info *p;
770 int cpu = smp_processor_id();
772 if (!cheetah_error_log)
775 p = cheetah_error_log + (cpu * 2);
776 if ((afsr & CHAFSR_TL1) != 0UL)
782 extern unsigned int tl0_icpe[], tl1_icpe[];
783 extern unsigned int tl0_dcpe[], tl1_dcpe[];
784 extern unsigned int tl0_fecc[], tl1_fecc[];
785 extern unsigned int tl0_cee[], tl1_cee[];
786 extern unsigned int tl0_iae[], tl1_iae[];
787 extern unsigned int tl0_dae[], tl1_dae[];
788 extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
789 extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
790 extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
791 extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
792 extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
794 void __init cheetah_ecache_flush_init(void)
796 unsigned long largest_size, smallest_linesize, order, ver;
799 /* Scan all cpu device tree nodes, note two values:
800 * 1) largest E-cache size
801 * 2) smallest E-cache line size
804 smallest_linesize = ~0UL;
806 for (i = 0; i < NR_CPUS; i++) {
809 val = cpu_data(i).ecache_size;
813 if (val > largest_size)
816 val = cpu_data(i).ecache_line_size;
817 if (val < smallest_linesize)
818 smallest_linesize = val;
822 if (largest_size == 0UL || smallest_linesize == ~0UL) {
823 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
828 ecache_flush_size = (2 * largest_size);
829 ecache_flush_linesize = smallest_linesize;
831 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
833 if (ecache_flush_physbase == ~0UL) {
834 prom_printf("cheetah_ecache_flush_init: Cannot find %d byte "
835 "contiguous physical memory.\n",
840 /* Now allocate error trap reporting scoreboard. */
841 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
842 for (order = 0; order < MAX_ORDER; order++) {
843 if ((PAGE_SIZE << order) >= sz)
846 cheetah_error_log = (struct cheetah_err_info *)
847 __get_free_pages(GFP_KERNEL, order);
848 if (!cheetah_error_log) {
849 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
850 "error logging scoreboard (%d bytes).\n", sz);
853 memset(cheetah_error_log, 0, PAGE_SIZE << order);
855 /* Mark all AFSRs as invalid so that the trap handler will
856 * log new new information there.
858 for (i = 0; i < 2 * NR_CPUS; i++)
859 cheetah_error_log[i].afsr = CHAFSR_INVALID;
861 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
862 if ((ver >> 32) == __JALAPENO_ID ||
863 (ver >> 32) == __SERRANO_ID) {
864 cheetah_error_table = &__jalapeno_error_table[0];
865 cheetah_afsr_errors = JPAFSR_ERRORS;
866 } else if ((ver >> 32) == 0x003e0015) {
867 cheetah_error_table = &__cheetah_plus_error_table[0];
868 cheetah_afsr_errors = CHPAFSR_ERRORS;
870 cheetah_error_table = &__cheetah_error_table[0];
871 cheetah_afsr_errors = CHAFSR_ERRORS;
874 /* Now patch trap tables. */
875 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
876 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
877 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
878 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
879 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
880 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
881 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
882 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
883 if (tlb_type == cheetah_plus) {
884 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
885 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
886 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
887 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
892 static void cheetah_flush_ecache(void)
894 unsigned long flush_base = ecache_flush_physbase;
895 unsigned long flush_linesize = ecache_flush_linesize;
896 unsigned long flush_size = ecache_flush_size;
898 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
899 " bne,pt %%xcc, 1b\n\t"
900 " ldxa [%2 + %0] %3, %%g0\n\t"
902 : "0" (flush_size), "r" (flush_base),
903 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
906 static void cheetah_flush_ecache_line(unsigned long physaddr)
910 physaddr &= ~(8UL - 1UL);
911 physaddr = (ecache_flush_physbase +
912 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
913 alias = physaddr + (ecache_flush_size >> 1UL);
914 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
915 "ldxa [%1] %2, %%g0\n\t"
918 : "r" (physaddr), "r" (alias),
919 "i" (ASI_PHYS_USE_EC));
922 /* Unfortunately, the diagnostic access to the I-cache tags we need to
923 * use to clear the thing interferes with I-cache coherency transactions.
925 * So we must only flush the I-cache when it is disabled.
927 static void __cheetah_flush_icache(void)
929 unsigned int icache_size, icache_line_size;
932 icache_size = local_cpu_data().icache_size;
933 icache_line_size = local_cpu_data().icache_line_size;
935 /* Clear the valid bits in all the tags. */
936 for (addr = 0; addr < icache_size; addr += icache_line_size) {
937 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
940 : "r" (addr | (2 << 3)),
945 static void cheetah_flush_icache(void)
947 unsigned long dcu_save;
949 /* Save current DCU, disable I-cache. */
950 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
951 "or %0, %2, %%g1\n\t"
952 "stxa %%g1, [%%g0] %1\n\t"
955 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
958 __cheetah_flush_icache();
960 /* Restore DCU register */
961 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
964 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
967 static void cheetah_flush_dcache(void)
969 unsigned int dcache_size, dcache_line_size;
972 dcache_size = local_cpu_data().dcache_size;
973 dcache_line_size = local_cpu_data().dcache_line_size;
975 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
976 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
979 : "r" (addr), "i" (ASI_DCACHE_TAG));
983 /* In order to make the even parity correct we must do two things.
984 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
985 * Next, we clear out all 32-bytes of data for that line. Data of
986 * all-zero + tag parity value of zero == correct parity.
988 static void cheetah_plus_zap_dcache_parity(void)
990 unsigned int dcache_size, dcache_line_size;
993 dcache_size = local_cpu_data().dcache_size;
994 dcache_line_size = local_cpu_data().dcache_line_size;
996 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
997 unsigned long tag = (addr >> 14);
1000 __asm__ __volatile__("membar #Sync\n\t"
1001 "stxa %0, [%1] %2\n\t"
1004 : "r" (tag), "r" (addr),
1005 "i" (ASI_DCACHE_UTAG));
1006 for (line = addr; line < addr + dcache_line_size; line += 8)
1007 __asm__ __volatile__("membar #Sync\n\t"
1008 "stxa %%g0, [%0] %1\n\t"
1012 "i" (ASI_DCACHE_DATA));
1016 /* Conversion tables used to frob Cheetah AFSR syndrome values into
1017 * something palatable to the memory controller driver get_unumber
1041 static unsigned char cheetah_ecc_syntab[] = {
1042 /*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1043 /*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1044 /*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1045 /*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1046 /*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1047 /*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1048 /*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1049 /*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1050 /*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1051 /*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1052 /*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1053 /*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1054 /*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1055 /*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1056 /*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1057 /*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1058 /*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1059 /*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1060 /*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1061 /*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1062 /*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1063 /*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1064 /*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1065 /*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1066 /*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1067 /*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1068 /*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1069 /*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1070 /*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1071 /*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1072 /*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1073 /*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1075 static unsigned char cheetah_mtag_syntab[] = {
1086 /* Return the highest priority error conditon mentioned. */
1087 static inline unsigned long cheetah_get_hipri(unsigned long afsr)
1089 unsigned long tmp = 0;
1092 for (i = 0; cheetah_error_table[i].mask; i++) {
1093 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1099 static const char *cheetah_get_string(unsigned long bit)
1103 for (i = 0; cheetah_error_table[i].mask; i++) {
1104 if ((bit & cheetah_error_table[i].mask) != 0UL)
1105 return cheetah_error_table[i].name;
1110 extern int chmc_getunumber(int, unsigned long, char *, int);
1112 static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1113 unsigned long afsr, unsigned long afar, int recoverable)
1115 unsigned long hipri;
1118 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1119 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1121 (afsr & CHAFSR_TL1) ? 1 : 0);
1122 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1123 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1124 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1125 printk("%s" "ERROR(%d): ",
1126 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1127 print_symbol("TPC<%s>\n", regs->tpc);
1128 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1129 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1130 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1131 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1132 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1133 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1134 hipri = cheetah_get_hipri(afsr);
1135 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1136 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1137 hipri, cheetah_get_string(hipri));
1139 /* Try to get unumber if relevant. */
1140 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1141 CHAFSR_CPC | CHAFSR_CPU | \
1142 CHAFSR_UE | CHAFSR_CE | \
1143 CHAFSR_EDC | CHAFSR_EDU | \
1144 CHAFSR_UCC | CHAFSR_UCU | \
1145 CHAFSR_WDU | CHAFSR_WDC)
1146 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1147 if (afsr & ESYND_ERRORS) {
1151 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1152 syndrome = cheetah_ecc_syntab[syndrome];
1153 ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum));
1155 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1156 (recoverable ? KERN_WARNING : KERN_CRIT),
1157 smp_processor_id(), unum);
1158 } else if (afsr & MSYND_ERRORS) {
1162 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1163 syndrome = cheetah_mtag_syntab[syndrome];
1164 ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum));
1166 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1167 (recoverable ? KERN_WARNING : KERN_CRIT),
1168 smp_processor_id(), unum);
1171 /* Now dump the cache snapshots. */
1172 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx]\n",
1173 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1174 (int) info->dcache_index,
1178 printk("%s" "ERROR(%d): D-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1179 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1180 info->dcache_data[0],
1181 info->dcache_data[1],
1182 info->dcache_data[2],
1183 info->dcache_data[3]);
1184 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx] "
1185 "u[%016lx] l[%016lx]\n",
1186 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1187 (int) info->icache_index,
1192 info->icache_lower);
1193 printk("%s" "ERROR(%d): I-cache INSN0[%016lx] INSN1[%016lx] INSN2[%016lx] INSN3[%016lx]\n",
1194 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1195 info->icache_data[0],
1196 info->icache_data[1],
1197 info->icache_data[2],
1198 info->icache_data[3]);
1199 printk("%s" "ERROR(%d): I-cache INSN4[%016lx] INSN5[%016lx] INSN6[%016lx] INSN7[%016lx]\n",
1200 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1201 info->icache_data[4],
1202 info->icache_data[5],
1203 info->icache_data[6],
1204 info->icache_data[7]);
1205 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016lx]\n",
1206 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1207 (int) info->ecache_index, info->ecache_tag);
1208 printk("%s" "ERROR(%d): E-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n",
1209 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1210 info->ecache_data[0],
1211 info->ecache_data[1],
1212 info->ecache_data[2],
1213 info->ecache_data[3]);
1215 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1216 while (afsr != 0UL) {
1217 unsigned long bit = cheetah_get_hipri(afsr);
1219 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1220 (recoverable ? KERN_WARNING : KERN_CRIT),
1221 bit, cheetah_get_string(bit));
1227 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1230 static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1232 unsigned long afsr, afar;
1235 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1238 if ((afsr & cheetah_afsr_errors) != 0) {
1240 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1248 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1250 : : "r" (afsr), "i" (ASI_AFSR));
1255 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1257 struct cheetah_err_info local_snapshot, *p;
1261 cheetah_flush_ecache();
1263 p = cheetah_get_error_log(afsr);
1265 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1267 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1268 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1272 /* Grab snapshot of logged error. */
1273 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1275 /* If the current trap snapshot does not match what the
1276 * trap handler passed along into our args, big trouble.
1277 * In such a case, mark the local copy as invalid.
1279 * Else, it matches and we mark the afsr in the non-local
1280 * copy as invalid so we may log new error traps there.
1282 if (p->afsr != afsr || p->afar != afar)
1283 local_snapshot.afsr = CHAFSR_INVALID;
1285 p->afsr = CHAFSR_INVALID;
1287 cheetah_flush_icache();
1288 cheetah_flush_dcache();
1290 /* Re-enable I-cache/D-cache */
1291 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1292 "or %%g1, %1, %%g1\n\t"
1293 "stxa %%g1, [%%g0] %0\n\t"
1296 : "i" (ASI_DCU_CONTROL_REG),
1297 "i" (DCU_DC | DCU_IC)
1300 /* Re-enable error reporting */
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_ESTATE_ERROR_EN),
1307 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1310 /* Decide if we can continue after handling this trap and
1311 * logging the error.
1314 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1317 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1318 * error was logged while we had error reporting traps disabled.
1320 if (cheetah_recheck_errors(&local_snapshot)) {
1321 unsigned long new_afsr = local_snapshot.afsr;
1323 /* If we got a new asynchronous error, die... */
1324 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1325 CHAFSR_WDU | CHAFSR_CPU |
1326 CHAFSR_IVU | CHAFSR_UE |
1327 CHAFSR_BERR | CHAFSR_TO))
1332 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1335 panic("Irrecoverable Fast-ECC error trap.\n");
1337 /* Flush E-cache to kick the error trap handlers out. */
1338 cheetah_flush_ecache();
1341 /* Try to fix a correctable error by pushing the line out from
1342 * the E-cache. Recheck error reporting registers to see if the
1343 * problem is intermittent.
1345 static int cheetah_fix_ce(unsigned long physaddr)
1347 unsigned long orig_estate;
1348 unsigned long alias1, alias2;
1351 /* Make sure correctable error traps are disabled. */
1352 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1353 "andn %0, %1, %%g1\n\t"
1354 "stxa %%g1, [%%g0] %2\n\t"
1356 : "=&r" (orig_estate)
1357 : "i" (ESTATE_ERROR_CEEN),
1358 "i" (ASI_ESTATE_ERROR_EN)
1361 /* We calculate alias addresses that will force the
1362 * cache line in question out of the E-cache. Then
1363 * we bring it back in with an atomic instruction so
1364 * that we get it in some modified/exclusive state,
1365 * then we displace it again to try and get proper ECC
1366 * pushed back into the system.
1368 physaddr &= ~(8UL - 1UL);
1369 alias1 = (ecache_flush_physbase +
1370 (physaddr & ((ecache_flush_size >> 1) - 1)));
1371 alias2 = alias1 + (ecache_flush_size >> 1);
1372 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1373 "ldxa [%1] %3, %%g0\n\t"
1374 "casxa [%2] %3, %%g0, %%g0\n\t"
1375 "membar #StoreLoad | #StoreStore\n\t"
1376 "ldxa [%0] %3, %%g0\n\t"
1377 "ldxa [%1] %3, %%g0\n\t"
1380 : "r" (alias1), "r" (alias2),
1381 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1383 /* Did that trigger another error? */
1384 if (cheetah_recheck_errors(NULL)) {
1385 /* Try one more time. */
1386 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1388 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1389 if (cheetah_recheck_errors(NULL))
1394 /* No new error, intermittent problem. */
1398 /* Restore error enables. */
1399 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1401 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1406 /* Return non-zero if PADDR is a valid physical memory address. */
1407 static int cheetah_check_main_memory(unsigned long paddr)
1409 unsigned long vaddr = PAGE_OFFSET + paddr;
1411 if (vaddr > (unsigned long) high_memory)
1414 return kern_addr_valid(vaddr);
1417 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1419 struct cheetah_err_info local_snapshot, *p;
1420 int recoverable, is_memory;
1422 p = cheetah_get_error_log(afsr);
1424 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1426 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1427 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1431 /* Grab snapshot of logged error. */
1432 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1434 /* If the current trap snapshot does not match what the
1435 * trap handler passed along into our args, big trouble.
1436 * In such a case, mark the local copy as invalid.
1438 * Else, it matches and we mark the afsr in the non-local
1439 * copy as invalid so we may log new error traps there.
1441 if (p->afsr != afsr || p->afar != afar)
1442 local_snapshot.afsr = CHAFSR_INVALID;
1444 p->afsr = CHAFSR_INVALID;
1446 is_memory = cheetah_check_main_memory(afar);
1448 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1449 /* XXX Might want to log the results of this operation
1450 * XXX somewhere... -DaveM
1452 cheetah_fix_ce(afar);
1456 int flush_all, flush_line;
1458 flush_all = flush_line = 0;
1459 if ((afsr & CHAFSR_EDC) != 0UL) {
1460 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1464 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1465 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1471 /* Trap handler only disabled I-cache, flush it. */
1472 cheetah_flush_icache();
1474 /* Re-enable I-cache */
1475 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1476 "or %%g1, %1, %%g1\n\t"
1477 "stxa %%g1, [%%g0] %0\n\t"
1480 : "i" (ASI_DCU_CONTROL_REG),
1485 cheetah_flush_ecache();
1486 else if (flush_line)
1487 cheetah_flush_ecache_line(afar);
1490 /* Re-enable error reporting */
1491 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1492 "or %%g1, %1, %%g1\n\t"
1493 "stxa %%g1, [%%g0] %0\n\t"
1496 : "i" (ASI_ESTATE_ERROR_EN),
1497 "i" (ESTATE_ERROR_CEEN)
1500 /* Decide if we can continue after handling this trap and
1501 * logging the error.
1504 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1507 /* Re-check AFSR/AFAR */
1508 (void) cheetah_recheck_errors(&local_snapshot);
1511 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1514 panic("Irrecoverable Correctable-ECC error trap.\n");
1517 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1519 struct cheetah_err_info local_snapshot, *p;
1520 int recoverable, is_memory;
1523 /* Check for the special PCI poke sequence. */
1524 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1525 cheetah_flush_icache();
1526 cheetah_flush_dcache();
1528 /* Re-enable I-cache/D-cache */
1529 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1530 "or %%g1, %1, %%g1\n\t"
1531 "stxa %%g1, [%%g0] %0\n\t"
1534 : "i" (ASI_DCU_CONTROL_REG),
1535 "i" (DCU_DC | DCU_IC)
1538 /* Re-enable error reporting */
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_ESTATE_ERROR_EN),
1545 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1548 (void) cheetah_recheck_errors(NULL);
1550 pci_poke_faulted = 1;
1552 regs->tnpc = regs->tpc + 4;
1557 p = cheetah_get_error_log(afsr);
1559 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1561 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1562 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1566 /* Grab snapshot of logged error. */
1567 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1569 /* If the current trap snapshot does not match what the
1570 * trap handler passed along into our args, big trouble.
1571 * In such a case, mark the local copy as invalid.
1573 * Else, it matches and we mark the afsr in the non-local
1574 * copy as invalid so we may log new error traps there.
1576 if (p->afsr != afsr || p->afar != afar)
1577 local_snapshot.afsr = CHAFSR_INVALID;
1579 p->afsr = CHAFSR_INVALID;
1581 is_memory = cheetah_check_main_memory(afar);
1584 int flush_all, flush_line;
1586 flush_all = flush_line = 0;
1587 if ((afsr & CHAFSR_EDU) != 0UL) {
1588 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1592 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1593 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1599 cheetah_flush_icache();
1600 cheetah_flush_dcache();
1602 /* Re-enable I/D caches */
1603 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1604 "or %%g1, %1, %%g1\n\t"
1605 "stxa %%g1, [%%g0] %0\n\t"
1608 : "i" (ASI_DCU_CONTROL_REG),
1609 "i" (DCU_IC | DCU_DC)
1613 cheetah_flush_ecache();
1614 else if (flush_line)
1615 cheetah_flush_ecache_line(afar);
1618 /* Re-enable error reporting */
1619 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1620 "or %%g1, %1, %%g1\n\t"
1621 "stxa %%g1, [%%g0] %0\n\t"
1624 : "i" (ASI_ESTATE_ERROR_EN),
1625 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1628 /* Decide if we can continue after handling this trap and
1629 * logging the error.
1632 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1635 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1636 * error was logged while we had error reporting traps disabled.
1638 if (cheetah_recheck_errors(&local_snapshot)) {
1639 unsigned long new_afsr = local_snapshot.afsr;
1641 /* If we got a new asynchronous error, die... */
1642 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1643 CHAFSR_WDU | CHAFSR_CPU |
1644 CHAFSR_IVU | CHAFSR_UE |
1645 CHAFSR_BERR | CHAFSR_TO))
1650 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1652 /* "Recoverable" here means we try to yank the page from ever
1653 * being newly used again. This depends upon a few things:
1654 * 1) Must be main memory, and AFAR must be valid.
1655 * 2) If we trapped from user, OK.
1656 * 3) Else, if we trapped from kernel we must find exception
1657 * table entry (ie. we have to have been accessing user
1660 * If AFAR is not in main memory, or we trapped from kernel
1661 * and cannot find an exception table entry, it is unacceptable
1662 * to try and continue.
1664 if (recoverable && is_memory) {
1665 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1666 /* OK, usermode access. */
1669 const struct exception_table_entry *entry;
1671 entry = search_exception_tables(regs->tpc);
1673 /* OK, kernel access to userspace. */
1677 /* BAD, privileged state is corrupted. */
1682 if (pfn_valid(afar >> PAGE_SHIFT))
1683 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1687 /* Only perform fixup if we still have a
1688 * recoverable condition.
1691 regs->tpc = entry->fixup;
1692 regs->tnpc = regs->tpc + 4;
1701 panic("Irrecoverable deferred error trap.\n");
1704 /* Handle a D/I cache parity error trap. TYPE is encoded as:
1706 * Bit0: 0=dcache,1=icache
1707 * Bit1: 0=recoverable,1=unrecoverable
1709 * The hardware has disabled both the I-cache and D-cache in
1710 * the %dcr register.
1712 void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1715 __cheetah_flush_icache();
1717 cheetah_plus_zap_dcache_parity();
1718 cheetah_flush_dcache();
1720 /* Re-enable I-cache/D-cache */
1721 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1722 "or %%g1, %1, %%g1\n\t"
1723 "stxa %%g1, [%%g0] %0\n\t"
1726 : "i" (ASI_DCU_CONTROL_REG),
1727 "i" (DCU_DC | DCU_IC)
1731 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1733 (type & 0x1) ? 'I' : 'D',
1735 print_symbol(KERN_EMERG "TPC<%s>\n", regs->tpc);
1736 panic("Irrecoverable Cheetah+ parity error.");
1739 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1741 (type & 0x1) ? 'I' : 'D',
1743 print_symbol(KERN_WARNING "TPC<%s>\n", regs->tpc);
1746 struct sun4v_error_entry {
1751 #define SUN4V_ERR_TYPE_UNDEFINED 0
1752 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1753 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1754 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1755 #define SUN4V_ERR_TYPE_WARNING_RES 4
1758 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1759 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1760 #define SUN4V_ERR_ATTRS_PIO 0x00000004
1761 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1762 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1763 #define SUN4V_ERR_ATTRS_USER_MODE 0x01000000
1764 #define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000
1765 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1773 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1774 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1776 static const char *sun4v_err_type_to_str(u32 type)
1779 case SUN4V_ERR_TYPE_UNDEFINED:
1781 case SUN4V_ERR_TYPE_UNCORRECTED_RES:
1782 return "uncorrected resumable";
1783 case SUN4V_ERR_TYPE_PRECISE_NONRES:
1784 return "precise nonresumable";
1785 case SUN4V_ERR_TYPE_DEFERRED_NONRES:
1786 return "deferred nonresumable";
1787 case SUN4V_ERR_TYPE_WARNING_RES:
1788 return "warning resumable";
1794 static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
1798 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1799 printk("%s: err_handle[%lx] err_stick[%lx] err_type[%08x:%s]\n",
1801 ent->err_handle, ent->err_stick,
1803 sun4v_err_type_to_str(ent->err_type));
1804 printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n",
1807 ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ?
1809 ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ?
1811 ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ?
1813 ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ?
1814 "integer-regs" : ""),
1815 ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ?
1817 ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ?
1819 ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ?
1821 ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ?
1822 "queue-full" : ""));
1823 printk("%s: err_raddr[%016lx] err_size[%u] err_cpu[%u]\n",
1825 ent->err_raddr, ent->err_size, ent->err_cpu);
1829 if ((cnt = atomic_read(ocnt)) != 0) {
1830 atomic_set(ocnt, 0);
1832 printk("%s: Queue overflowed %d times.\n",
1837 /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate.
1838 * Log the event and clear the first word of the entry.
1840 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
1842 struct sun4v_error_entry *ent, local_copy;
1843 struct trap_per_cpu *tb;
1844 unsigned long paddr;
1849 tb = &trap_block[cpu];
1850 paddr = tb->resum_kernel_buf_pa + offset;
1853 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
1855 /* We have a local copy now, so release the entry. */
1856 ent->err_handle = 0;
1861 if (ent->err_type == SUN4V_ERR_TYPE_WARNING_RES) {
1862 /* If err_type is 0x4, it's a powerdown request. Do
1863 * not do the usual resumable error log because that
1864 * makes it look like some abnormal error.
1866 printk(KERN_INFO "Power down request...\n");
1867 kill_cad_pid(SIGINT, 1);
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 print_symbol(KERN_EMERG "SUN4V-ITLB: TPC<%s>\n", regs->tpc);
1951 printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
1952 print_symbol(KERN_EMERG "SUN4V-ITLB: O7<%s>\n", regs->u_regs[UREG_I7]);
1953 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
1954 "pte[%lx] error[%lx]\n",
1955 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
1956 sun4v_err_itlb_pte, sun4v_err_itlb_error);
1961 unsigned long sun4v_err_dtlb_vaddr;
1962 unsigned long sun4v_err_dtlb_ctx;
1963 unsigned long sun4v_err_dtlb_pte;
1964 unsigned long sun4v_err_dtlb_error;
1966 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
1969 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
1971 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
1973 print_symbol(KERN_EMERG "SUN4V-DTLB: TPC<%s>\n", regs->tpc);
1974 printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
1975 print_symbol(KERN_EMERG "SUN4V-DTLB: O7<%s>\n", regs->u_regs[UREG_I7]);
1976 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
1977 "pte[%lx] error[%lx]\n",
1978 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
1979 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
1984 void hypervisor_tlbop_error(unsigned long err, unsigned long op)
1986 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
1990 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
1992 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
1996 void do_fpe_common(struct pt_regs *regs)
1998 if (regs->tstate & TSTATE_PRIV) {
1999 regs->tpc = regs->tnpc;
2002 unsigned long fsr = current_thread_info()->xfsr[0];
2005 if (test_thread_flag(TIF_32BIT)) {
2006 regs->tpc &= 0xffffffff;
2007 regs->tnpc &= 0xffffffff;
2009 info.si_signo = SIGFPE;
2011 info.si_addr = (void __user *)regs->tpc;
2013 info.si_code = __SI_FAULT;
2014 if ((fsr & 0x1c000) == (1 << 14)) {
2016 info.si_code = FPE_FLTINV;
2017 else if (fsr & 0x08)
2018 info.si_code = FPE_FLTOVF;
2019 else if (fsr & 0x04)
2020 info.si_code = FPE_FLTUND;
2021 else if (fsr & 0x02)
2022 info.si_code = FPE_FLTDIV;
2023 else if (fsr & 0x01)
2024 info.si_code = FPE_FLTRES;
2026 force_sig_info(SIGFPE, &info, current);
2030 void do_fpieee(struct pt_regs *regs)
2032 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2033 0, 0x24, SIGFPE) == NOTIFY_STOP)
2036 do_fpe_common(regs);
2039 extern int do_mathemu(struct pt_regs *, struct fpustate *);
2041 void do_fpother(struct pt_regs *regs)
2043 struct fpustate *f = FPUSTATE;
2046 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2047 0, 0x25, SIGFPE) == NOTIFY_STOP)
2050 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2051 case (2 << 14): /* unfinished_FPop */
2052 case (3 << 14): /* unimplemented_FPop */
2053 ret = do_mathemu(regs, f);
2058 do_fpe_common(regs);
2061 void do_tof(struct pt_regs *regs)
2065 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2066 0, 0x26, SIGEMT) == NOTIFY_STOP)
2069 if (regs->tstate & TSTATE_PRIV)
2070 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2071 if (test_thread_flag(TIF_32BIT)) {
2072 regs->tpc &= 0xffffffff;
2073 regs->tnpc &= 0xffffffff;
2075 info.si_signo = SIGEMT;
2077 info.si_code = EMT_TAGOVF;
2078 info.si_addr = (void __user *)regs->tpc;
2080 force_sig_info(SIGEMT, &info, current);
2083 void do_div0(struct pt_regs *regs)
2087 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2088 0, 0x28, SIGFPE) == NOTIFY_STOP)
2091 if (regs->tstate & TSTATE_PRIV)
2092 die_if_kernel("TL0: Kernel divide by zero.", regs);
2093 if (test_thread_flag(TIF_32BIT)) {
2094 regs->tpc &= 0xffffffff;
2095 regs->tnpc &= 0xffffffff;
2097 info.si_signo = SIGFPE;
2099 info.si_code = FPE_INTDIV;
2100 info.si_addr = (void __user *)regs->tpc;
2102 force_sig_info(SIGFPE, &info, current);
2105 void instruction_dump (unsigned int *pc)
2109 if ((((unsigned long) pc) & 3))
2112 printk("Instruction DUMP:");
2113 for (i = -3; i < 6; i++)
2114 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2118 static void user_instruction_dump (unsigned int __user *pc)
2121 unsigned int buf[9];
2123 if ((((unsigned long) pc) & 3))
2126 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2129 printk("Instruction DUMP:");
2130 for (i = 0; i < 9; i++)
2131 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2135 void show_stack(struct task_struct *tsk, unsigned long *_ksp)
2137 unsigned long pc, fp, thread_base, ksp;
2138 struct thread_info *tp;
2139 struct reg_window *rw;
2142 ksp = (unsigned long) _ksp;
2145 tp = task_thread_info(tsk);
2148 asm("mov %%fp, %0" : "=r" (ksp));
2152 if (tp == current_thread_info())
2155 fp = ksp + STACK_BIAS;
2156 thread_base = (unsigned long) tp;
2158 printk("Call Trace:");
2159 #ifdef CONFIG_KALLSYMS
2163 /* Bogus frame pointer? */
2164 if (fp < (thread_base + sizeof(struct thread_info)) ||
2165 fp >= (thread_base + THREAD_SIZE))
2167 rw = (struct reg_window *)fp;
2169 printk(" [%016lx] ", pc);
2170 print_symbol("%s\n", pc);
2171 fp = rw->ins[6] + STACK_BIAS;
2172 } while (++count < 16);
2173 #ifndef CONFIG_KALLSYMS
2178 void dump_stack(void)
2180 show_stack(current, NULL);
2183 EXPORT_SYMBOL(dump_stack);
2185 static inline int is_kernel_stack(struct task_struct *task,
2186 struct reg_window *rw)
2188 unsigned long rw_addr = (unsigned long) rw;
2189 unsigned long thread_base, thread_end;
2191 if (rw_addr < PAGE_OFFSET) {
2192 if (task != &init_task)
2196 thread_base = (unsigned long) task_stack_page(task);
2197 thread_end = thread_base + sizeof(union thread_union);
2198 if (rw_addr >= thread_base &&
2199 rw_addr < thread_end &&
2206 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2208 unsigned long fp = rw->ins[6];
2213 return (struct reg_window *) (fp + STACK_BIAS);
2216 void die_if_kernel(char *str, struct pt_regs *regs)
2218 static int die_counter;
2219 extern void smp_report_regs(void);
2222 /* Amuse the user. */
2225 " \"@'/ .. \\`@\"\n"
2229 printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
2230 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2231 __asm__ __volatile__("flushw");
2233 add_taint(TAINT_DIE);
2234 if (regs->tstate & TSTATE_PRIV) {
2235 struct reg_window *rw = (struct reg_window *)
2236 (regs->u_regs[UREG_FP] + STACK_BIAS);
2238 /* Stop the back trace when we hit userland or we
2239 * find some badly aligned kernel stack.
2243 is_kernel_stack(current, rw)) {
2244 printk("Caller[%016lx]", rw->ins[7]);
2245 print_symbol(": %s", rw->ins[7]);
2248 rw = kernel_stack_up(rw);
2250 instruction_dump ((unsigned int *) regs->tpc);
2252 if (test_thread_flag(TIF_32BIT)) {
2253 regs->tpc &= 0xffffffff;
2254 regs->tnpc &= 0xffffffff;
2256 user_instruction_dump ((unsigned int __user *) regs->tpc);
2263 if (regs->tstate & TSTATE_PRIV)
2268 #define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2269 #define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2271 extern int handle_popc(u32 insn, struct pt_regs *regs);
2272 extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
2273 extern int vis_emul(struct pt_regs *, unsigned int);
2275 void do_illegal_instruction(struct pt_regs *regs)
2277 unsigned long pc = regs->tpc;
2278 unsigned long tstate = regs->tstate;
2282 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2283 0, 0x10, SIGILL) == NOTIFY_STOP)
2286 if (tstate & TSTATE_PRIV)
2287 die_if_kernel("Kernel illegal instruction", regs);
2288 if (test_thread_flag(TIF_32BIT))
2290 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2291 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2292 if (handle_popc(insn, regs))
2294 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2295 if (handle_ldf_stq(insn, regs))
2297 } else if (tlb_type == hypervisor) {
2298 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2299 if (!vis_emul(regs, insn))
2302 struct fpustate *f = FPUSTATE;
2304 /* XXX maybe verify XFSR bits like
2305 * XXX do_fpother() does?
2307 if (do_mathemu(regs, f))
2312 info.si_signo = SIGILL;
2314 info.si_code = ILL_ILLOPC;
2315 info.si_addr = (void __user *)pc;
2317 force_sig_info(SIGILL, &info, current);
2320 extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
2322 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2326 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2327 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2330 if (regs->tstate & TSTATE_PRIV) {
2331 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2334 info.si_signo = SIGBUS;
2336 info.si_code = BUS_ADRALN;
2337 info.si_addr = (void __user *)sfar;
2339 force_sig_info(SIGBUS, &info, current);
2342 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2346 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2347 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2350 if (regs->tstate & TSTATE_PRIV) {
2351 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2354 info.si_signo = SIGBUS;
2356 info.si_code = BUS_ADRALN;
2357 info.si_addr = (void __user *) addr;
2359 force_sig_info(SIGBUS, &info, current);
2362 void do_privop(struct pt_regs *regs)
2366 if (notify_die(DIE_TRAP, "privileged operation", regs,
2367 0, 0x11, SIGILL) == NOTIFY_STOP)
2370 if (test_thread_flag(TIF_32BIT)) {
2371 regs->tpc &= 0xffffffff;
2372 regs->tnpc &= 0xffffffff;
2374 info.si_signo = SIGILL;
2376 info.si_code = ILL_PRVOPC;
2377 info.si_addr = (void __user *)regs->tpc;
2379 force_sig_info(SIGILL, &info, current);
2382 void do_privact(struct pt_regs *regs)
2387 /* Trap level 1 stuff or other traps we should never see... */
2388 void do_cee(struct pt_regs *regs)
2390 die_if_kernel("TL0: Cache Error Exception", regs);
2393 void do_cee_tl1(struct pt_regs *regs)
2395 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2396 die_if_kernel("TL1: Cache Error Exception", regs);
2399 void do_dae_tl1(struct pt_regs *regs)
2401 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2402 die_if_kernel("TL1: Data Access Exception", regs);
2405 void do_iae_tl1(struct pt_regs *regs)
2407 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2408 die_if_kernel("TL1: Instruction Access Exception", regs);
2411 void do_div0_tl1(struct pt_regs *regs)
2413 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2414 die_if_kernel("TL1: DIV0 Exception", regs);
2417 void do_fpdis_tl1(struct pt_regs *regs)
2419 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2420 die_if_kernel("TL1: FPU Disabled", regs);
2423 void do_fpieee_tl1(struct pt_regs *regs)
2425 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2426 die_if_kernel("TL1: FPU IEEE Exception", regs);
2429 void do_fpother_tl1(struct pt_regs *regs)
2431 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2432 die_if_kernel("TL1: FPU Other Exception", regs);
2435 void do_ill_tl1(struct pt_regs *regs)
2437 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2438 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2441 void do_irq_tl1(struct pt_regs *regs)
2443 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2444 die_if_kernel("TL1: IRQ Exception", regs);
2447 void do_lddfmna_tl1(struct pt_regs *regs)
2449 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2450 die_if_kernel("TL1: LDDF Exception", regs);
2453 void do_stdfmna_tl1(struct pt_regs *regs)
2455 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2456 die_if_kernel("TL1: STDF Exception", regs);
2459 void do_paw(struct pt_regs *regs)
2461 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2464 void do_paw_tl1(struct pt_regs *regs)
2466 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2467 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2470 void do_vaw(struct pt_regs *regs)
2472 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2475 void do_vaw_tl1(struct pt_regs *regs)
2477 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2478 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2481 void do_tof_tl1(struct pt_regs *regs)
2483 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2484 die_if_kernel("TL1: Tag Overflow Exception", regs);
2487 void do_getpsr(struct pt_regs *regs)
2489 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2490 regs->tpc = regs->tnpc;
2492 if (test_thread_flag(TIF_32BIT)) {
2493 regs->tpc &= 0xffffffff;
2494 regs->tnpc &= 0xffffffff;
2498 struct trap_per_cpu trap_block[NR_CPUS];
2500 /* This can get invoked before sched_init() so play it super safe
2501 * and use hard_smp_processor_id().
2503 void init_cur_cpu_trap(struct thread_info *t)
2505 int cpu = hard_smp_processor_id();
2506 struct trap_per_cpu *p = &trap_block[cpu];
2512 extern void thread_info_offsets_are_bolixed_dave(void);
2513 extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2514 extern void tsb_config_offsets_are_bolixed_dave(void);
2516 /* Only invoked on boot processor. */
2517 void __init trap_init(void)
2519 /* Compile time sanity check. */
2520 if (TI_TASK != offsetof(struct thread_info, task) ||
2521 TI_FLAGS != offsetof(struct thread_info, flags) ||
2522 TI_CPU != offsetof(struct thread_info, cpu) ||
2523 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2524 TI_KSP != offsetof(struct thread_info, ksp) ||
2525 TI_FAULT_ADDR != offsetof(struct thread_info, fault_address) ||
2526 TI_KREGS != offsetof(struct thread_info, kregs) ||
2527 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2528 TI_EXEC_DOMAIN != offsetof(struct thread_info, exec_domain) ||
2529 TI_REG_WINDOW != offsetof(struct thread_info, reg_window) ||
2530 TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) ||
2531 TI_GSR != offsetof(struct thread_info, gsr) ||
2532 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2533 TI_USER_CNTD0 != offsetof(struct thread_info, user_cntd0) ||
2534 TI_USER_CNTD1 != offsetof(struct thread_info, user_cntd1) ||
2535 TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) ||
2536 TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) ||
2537 TI_PCR != offsetof(struct thread_info, pcr_reg) ||
2538 TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) ||
2539 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2540 TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) ||
2541 TI_RESTART_BLOCK != offsetof(struct thread_info, restart_block) ||
2542 TI_KUNA_REGS != offsetof(struct thread_info, kern_una_regs) ||
2543 TI_KUNA_INSN != offsetof(struct thread_info, kern_una_insn) ||
2544 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2545 (TI_FPREGS & (64 - 1)))
2546 thread_info_offsets_are_bolixed_dave();
2548 if (TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, thread) ||
2549 (TRAP_PER_CPU_PGD_PADDR !=
2550 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2551 (TRAP_PER_CPU_CPU_MONDO_PA !=
2552 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2553 (TRAP_PER_CPU_DEV_MONDO_PA !=
2554 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2555 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2556 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2557 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2558 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2559 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2560 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2561 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2562 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2563 (TRAP_PER_CPU_FAULT_INFO !=
2564 offsetof(struct trap_per_cpu, fault_info)) ||
2565 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2566 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2567 (TRAP_PER_CPU_CPU_LIST_PA !=
2568 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2569 (TRAP_PER_CPU_TSB_HUGE !=
2570 offsetof(struct trap_per_cpu, tsb_huge)) ||
2571 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2572 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2573 (TRAP_PER_CPU_IRQ_WORKLIST_PA !=
2574 offsetof(struct trap_per_cpu, irq_worklist_pa)) ||
2575 (TRAP_PER_CPU_CPU_MONDO_QMASK !=
2576 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) ||
2577 (TRAP_PER_CPU_DEV_MONDO_QMASK !=
2578 offsetof(struct trap_per_cpu, dev_mondo_qmask)) ||
2579 (TRAP_PER_CPU_RESUM_QMASK !=
2580 offsetof(struct trap_per_cpu, resum_qmask)) ||
2581 (TRAP_PER_CPU_NONRESUM_QMASK !=
2582 offsetof(struct trap_per_cpu, nonresum_qmask)))
2583 trap_per_cpu_offsets_are_bolixed_dave();
2585 if ((TSB_CONFIG_TSB !=
2586 offsetof(struct tsb_config, tsb)) ||
2587 (TSB_CONFIG_RSS_LIMIT !=
2588 offsetof(struct tsb_config, tsb_rss_limit)) ||
2589 (TSB_CONFIG_NENTRIES !=
2590 offsetof(struct tsb_config, tsb_nentries)) ||
2591 (TSB_CONFIG_REG_VAL !=
2592 offsetof(struct tsb_config, tsb_reg_val)) ||
2593 (TSB_CONFIG_MAP_VADDR !=
2594 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2595 (TSB_CONFIG_MAP_PTE !=
2596 offsetof(struct tsb_config, tsb_map_pte)))
2597 tsb_config_offsets_are_bolixed_dave();
2599 /* Attach to the address space of init_task. On SMP we
2600 * do this in smp.c:smp_callin for other cpus.
2602 atomic_inc(&init_mm.mm_count);
2603 current->active_mm = &init_mm;