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1// SPDX-License-Identifier: GPL-2.0-only
2/* arch/sparc64/kernel/traps.c
3 *
4 * Copyright (C) 1995,1997,2008,2009,2012 David S. Miller (davem@davemloft.net)
5 * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com)
6 */
7
8/*
9 * I like traps on v9, :))))
10 */
11
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>
19#include <linux/mm.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>
27
28#include <asm/smp.h>
29#include <asm/delay.h>
30#include <asm/ptrace.h>
31#include <asm/oplib.h>
32#include <asm/page.h>
33#include <asm/unistd.h>
34#include <linux/uaccess.h>
35#include <asm/fpumacro.h>
36#include <asm/lsu.h>
37#include <asm/dcu.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>
44#include <asm/head.h>
45#include <asm/prom.h>
46#include <asm/memctrl.h>
47#include <asm/cacheflush.h>
48#include <asm/setup.h>
49
50#include "entry.h"
51#include "kernel.h"
52#include "kstack.h"
53
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
57 * is as follows:
58 */
59struct tl1_traplog {
60 struct {
61 unsigned long tstate;
62 unsigned long tpc;
63 unsigned long tnpc;
64 unsigned long tt;
65 } trapstack[4];
66 unsigned long tl;
67};
68
69static void dump_tl1_traplog(struct tl1_traplog *p)
70{
71 int i, limit;
72
73 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
74 "dumping track stack.\n", p->tl);
75
76 limit = (tlb_type == hypervisor) ? 2 : 4;
77 for (i = 0; i < limit; i++) {
78 printk(KERN_EMERG
79 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
80 "TNPC[%016lx] TT[%lx]\n",
81 i + 1,
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);
85 }
86}
87
88void bad_trap(struct pt_regs *regs, long lvl)
89{
90 char buffer[36];
91
92 if (notify_die(DIE_TRAP, "bad trap", regs,
93 0, lvl, SIGTRAP) == NOTIFY_STOP)
94 return;
95
96 if (lvl < 0x100) {
97 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
98 die_if_kernel(buffer, regs);
99 }
100
101 lvl -= 0x100;
102 if (regs->tstate & TSTATE_PRIV) {
103 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
104 die_if_kernel(buffer, regs);
105 }
106 if (test_thread_flag(TIF_32BIT)) {
107 regs->tpc &= 0xffffffff;
108 regs->tnpc &= 0xffffffff;
109 }
110 force_sig_fault_trapno(SIGILL, ILL_ILLTRP,
111 (void __user *)regs->tpc, lvl);
112}
113
114void bad_trap_tl1(struct pt_regs *regs, long lvl)
115{
116 char buffer[36];
117
118 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
119 0, lvl, SIGTRAP) == NOTIFY_STOP)
120 return;
121
122 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
123
124 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
125 die_if_kernel (buffer, regs);
126}
127
128#ifdef CONFIG_DEBUG_BUGVERBOSE
129void do_BUG(const char *file, int line)
130{
131 bust_spinlocks(1);
132 printk("kernel BUG at %s:%d!\n", file, line);
133}
134EXPORT_SYMBOL(do_BUG);
135#endif
136
137static DEFINE_SPINLOCK(dimm_handler_lock);
138static dimm_printer_t dimm_handler;
139
140static int sprintf_dimm(int synd_code, unsigned long paddr, char *buf, int buflen)
141{
142 unsigned long flags;
143 int ret = -ENODEV;
144
145 spin_lock_irqsave(&dimm_handler_lock, flags);
146 if (dimm_handler) {
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)
150 ret = -EINVAL;
151 else
152 ret = 0;
153 } else
154 ret = -ENODEV;
155 spin_unlock_irqrestore(&dimm_handler_lock, flags);
156
157 return ret;
158}
159
160int register_dimm_printer(dimm_printer_t func)
161{
162 unsigned long flags;
163 int ret = 0;
164
165 spin_lock_irqsave(&dimm_handler_lock, flags);
166 if (!dimm_handler)
167 dimm_handler = func;
168 else
169 ret = -EEXIST;
170 spin_unlock_irqrestore(&dimm_handler_lock, flags);
171
172 return ret;
173}
174EXPORT_SYMBOL_GPL(register_dimm_printer);
175
176void unregister_dimm_printer(dimm_printer_t func)
177{
178 unsigned long flags;
179
180 spin_lock_irqsave(&dimm_handler_lock, flags);
181 if (dimm_handler == func)
182 dimm_handler = NULL;
183 spin_unlock_irqrestore(&dimm_handler_lock, flags);
184}
185EXPORT_SYMBOL_GPL(unregister_dimm_printer);
186
187void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
188{
189 enum ctx_state prev_state = exception_enter();
190
191 if (notify_die(DIE_TRAP, "instruction access exception", regs,
192 0, 0x8, SIGTRAP) == NOTIFY_STOP)
193 goto out;
194
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);
199 }
200 if (test_thread_flag(TIF_32BIT)) {
201 regs->tpc &= 0xffffffff;
202 regs->tnpc &= 0xffffffff;
203 }
204 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)regs->tpc);
205out:
206 exception_exit(prev_state);
207}
208
209void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
210{
211 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
212 0, 0x8, SIGTRAP) == NOTIFY_STOP)
213 return;
214
215 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
216 spitfire_insn_access_exception(regs, sfsr, sfar);
217}
218
219void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
220{
221 unsigned short type = (type_ctx >> 16);
222 unsigned short ctx = (type_ctx & 0xffff);
223
224 if (notify_die(DIE_TRAP, "instruction access exception", regs,
225 0, 0x8, SIGTRAP) == NOTIFY_STOP)
226 return;
227
228 if (regs->tstate & TSTATE_PRIV) {
229 printk("sun4v_insn_access_exception: ADDR[%016lx] "
230 "CTX[%04x] TYPE[%04x], going.\n",
231 addr, ctx, type);
232 die_if_kernel("Iax", regs);
233 }
234
235 if (test_thread_flag(TIF_32BIT)) {
236 regs->tpc &= 0xffffffff;
237 regs->tnpc &= 0xffffffff;
238 }
239 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *) addr);
240}
241
242void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
243{
244 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
245 0, 0x8, SIGTRAP) == NOTIFY_STOP)
246 return;
247
248 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
249 sun4v_insn_access_exception(regs, addr, type_ctx);
250}
251
252bool is_no_fault_exception(struct pt_regs *regs)
253{
254 unsigned char asi;
255 u32 insn;
256
257 if (get_user(insn, (u32 __user *)regs->tpc) == -EFAULT)
258 return false;
259
260 /*
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.
271 */
272 if ((insn & 0xc0800000) == 0xc0800000) { /* op=3, op3[4]=1 */
273 if (insn & 0x2000) /* immediate offset */
274 asi = (regs->tstate >> 24); /* saved %asi */
275 else
276 asi = (insn >> 5); /* immediate asi */
277 if ((asi & 0xf6) == ASI_PNF) {
278 if (insn & 0x200000) /* op3[2], stores */
279 return false;
280 if (insn & 0x1000000) /* op3[5:4]=3 (fp) */
281 handle_ldf_stq(insn, regs);
282 else
283 handle_ld_nf(insn, regs);
284 return true;
285 }
286 }
287 return false;
288}
289
290void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
291{
292 enum ctx_state prev_state = exception_enter();
293
294 if (notify_die(DIE_TRAP, "data access exception", regs,
295 0, 0x30, SIGTRAP) == NOTIFY_STOP)
296 goto out;
297
298 if (regs->tstate & TSTATE_PRIV) {
299 /* Test if this comes from uaccess places. */
300 const struct exception_table_entry *entry;
301
302 entry = search_exception_tables(regs->tpc);
303 if (entry) {
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);
309#endif
310 regs->tpc = entry->fixup;
311 regs->tnpc = regs->tpc + 4;
312 goto out;
313 }
314 /* Shit... */
315 printk("spitfire_data_access_exception: SFSR[%016lx] "
316 "SFAR[%016lx], going.\n", sfsr, sfar);
317 die_if_kernel("Dax", regs);
318 }
319
320 if (is_no_fault_exception(regs))
321 return;
322
323 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)sfar);
324out:
325 exception_exit(prev_state);
326}
327
328void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
329{
330 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
331 0, 0x30, SIGTRAP) == NOTIFY_STOP)
332 return;
333
334 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
335 spitfire_data_access_exception(regs, sfsr, sfar);
336}
337
338void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
339{
340 unsigned short type = (type_ctx >> 16);
341 unsigned short ctx = (type_ctx & 0xffff);
342
343 if (notify_die(DIE_TRAP, "data access exception", regs,
344 0, 0x8, SIGTRAP) == NOTIFY_STOP)
345 return;
346
347 if (regs->tstate & TSTATE_PRIV) {
348 /* Test if this comes from uaccess places. */
349 const struct exception_table_entry *entry;
350
351 entry = search_exception_tables(regs->tpc);
352 if (entry) {
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);
358#endif
359 regs->tpc = entry->fixup;
360 regs->tnpc = regs->tpc + 4;
361 return;
362 }
363 printk("sun4v_data_access_exception: ADDR[%016lx] "
364 "CTX[%04x] TYPE[%04x], going.\n",
365 addr, ctx, type);
366 die_if_kernel("Dax", regs);
367 }
368
369 if (test_thread_flag(TIF_32BIT)) {
370 regs->tpc &= 0xffffffff;
371 regs->tnpc &= 0xffffffff;
372 }
373 if (is_no_fault_exception(regs))
374 return;
375
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.
384 */
385 switch (type) {
386 case HV_FAULT_TYPE_INV_ASI:
387 force_sig_fault(SIGILL, ILL_ILLADR, (void __user *)addr);
388 break;
389 case HV_FAULT_TYPE_MCD_DIS:
390 force_sig_fault(SIGSEGV, SEGV_ACCADI, (void __user *)addr);
391 break;
392 default:
393 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)addr);
394 break;
395 }
396}
397
398void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
399{
400 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
401 0, 0x8, SIGTRAP) == NOTIFY_STOP)
402 return;
403
404 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
405 sun4v_data_access_exception(regs, addr, type_ctx);
406}
407
408#ifdef CONFIG_PCI
409#include "pci_impl.h"
410#endif
411
412/* When access exceptions happen, we must do this. */
413static void spitfire_clean_and_reenable_l1_caches(void)
414{
415 unsigned long va;
416
417 if (tlb_type != spitfire)
418 BUG();
419
420 /* Clean 'em. */
421 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
422 spitfire_put_icache_tag(va, 0x0);
423 spitfire_put_dcache_tag(va, 0x0);
424 }
425
426 /* Re-enable in LSU. */
427 __asm__ __volatile__("flush %%g6\n\t"
428 "membar #Sync\n\t"
429 "stxa %0, [%%g0] %1\n\t"
430 "membar #Sync"
431 : /* no outputs */
432 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
433 LSU_CONTROL_IM | LSU_CONTROL_DM),
434 "i" (ASI_LSU_CONTROL)
435 : "memory");
436}
437
438static void spitfire_enable_estate_errors(void)
439{
440 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
441 "membar #Sync"
442 : /* no outputs */
443 : "r" (ESTATE_ERR_ALL),
444 "i" (ASI_ESTATE_ERROR_EN));
445}
446
447static 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
480};
481
482static char *syndrome_unknown = "<Unknown>";
483
484static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
485{
486 unsigned short scode;
487 char memmod_str[64], *p;
488
489 if (udbl & bit) {
490 scode = ecc_syndrome_table[udbl & 0xff];
491 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
492 p = syndrome_unknown;
493 else
494 p = memmod_str;
495 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
496 "Memory Module \"%s\"\n",
497 smp_processor_id(), scode, p);
498 }
499
500 if (udbh & bit) {
501 scode = ecc_syndrome_table[udbh & 0xff];
502 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
503 p = syndrome_unknown;
504 else
505 p = memmod_str;
506 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
507 "Memory Module \"%s\"\n",
508 smp_processor_id(), scode, p);
509 }
510
511}
512
513static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
514{
515
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);
519
520 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
521
522 /* We always log it, even if someone is listening for this
523 * trap.
524 */
525 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
526 0, TRAP_TYPE_CEE, SIGTRAP);
527
528 /* The Correctable ECC Error trap does not disable I/D caches. So
529 * we only have to restore the ESTATE Error Enable register.
530 */
531 spitfire_enable_estate_errors();
532}
533
534static 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)
535{
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);
539
540 /* XXX add more human friendly logging of the error status
541 * XXX as is implemented for cheetah
542 */
543
544 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
545
546 /* We always log it, even if someone is listening for this
547 * trap.
548 */
549 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
550 0, tt, SIGTRAP);
551
552 if (regs->tstate & TSTATE_PRIV) {
553 if (tl1)
554 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
555 die_if_kernel("UE", regs);
556 }
557
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
561 */
562
563 spitfire_clean_and_reenable_l1_caches();
564 spitfire_enable_estate_errors();
565
566 if (test_thread_flag(TIF_32BIT)) {
567 regs->tpc &= 0xffffffff;
568 regs->tnpc &= 0xffffffff;
569 }
570 force_sig_fault(SIGBUS, BUS_OBJERR, (void *)0);
571}
572
573void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
574{
575 unsigned long afsr, tt, udbh, udbl;
576 int tl1;
577
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;
583
584#ifdef CONFIG_PCI
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();
589
590 pci_poke_faulted = 1;
591 regs->tnpc = regs->tpc + 4;
592 return;
593 }
594#endif
595
596 if (afsr & SFAFSR_UE)
597 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
598
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.
602 */
603 if (afsr & SFAFSR_UE) {
604 if (udbh & UDBE_CE) {
605 __asm__ __volatile__(
606 "stxa %0, [%1] %2\n\t"
607 "membar #Sync"
608 : /* no outputs */
609 : "r" (udbh & UDBE_CE),
610 "r" (0x0), "i" (ASI_UDB_ERROR_W));
611 }
612 if (udbl & UDBE_CE) {
613 __asm__ __volatile__(
614 "stxa %0, [%1] %2\n\t"
615 "membar #Sync"
616 : /* no outputs */
617 : "r" (udbl & UDBE_CE),
618 "r" (0x18), "i" (ASI_UDB_ERROR_W));
619 }
620 }
621
622 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
623 }
624}
625
626int cheetah_pcache_forced_on;
627
628void cheetah_enable_pcache(void)
629{
630 unsigned long dcr;
631
632 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
633 smp_processor_id());
634
635 __asm__ __volatile__("ldxa [%%g0] %1, %0"
636 : "=r" (dcr)
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"
640 "membar #Sync"
641 : /* no outputs */
642 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
643}
644
645/* Cheetah error trap handling. */
646static unsigned long ecache_flush_physbase;
647static unsigned long ecache_flush_linesize;
648static unsigned long ecache_flush_size;
649
650/* This table is ordered in priority of errors and matches the
651 * AFAR overwrite policy as well.
652 */
653
654struct afsr_error_table {
655 unsigned long mask;
656 const char *name;
657};
658
659static const char CHAFSR_PERR_msg[] =
660 "System interface protocol error";
661static const char CHAFSR_IERR_msg[] =
662 "Internal processor error";
663static const char CHAFSR_ISAP_msg[] =
664 "System request parity error on incoming address";
665static const char CHAFSR_UCU_msg[] =
666 "Uncorrectable E-cache ECC error for ifetch/data";
667static const char CHAFSR_UCC_msg[] =
668 "SW Correctable E-cache ECC error for ifetch/data";
669static const char CHAFSR_UE_msg[] =
670 "Uncorrectable system bus data ECC error for read";
671static const char CHAFSR_EDU_msg[] =
672 "Uncorrectable E-cache ECC error for stmerge/blkld";
673static const char CHAFSR_EMU_msg[] =
674 "Uncorrectable system bus MTAG error";
675static const char CHAFSR_WDU_msg[] =
676 "Uncorrectable E-cache ECC error for writeback";
677static const char CHAFSR_CPU_msg[] =
678 "Uncorrectable ECC error for copyout";
679static const char CHAFSR_CE_msg[] =
680 "HW corrected system bus data ECC error for read";
681static const char CHAFSR_EDC_msg[] =
682 "HW corrected E-cache ECC error for stmerge/blkld";
683static const char CHAFSR_EMC_msg[] =
684 "HW corrected system bus MTAG ECC error";
685static const char CHAFSR_WDC_msg[] =
686 "HW corrected E-cache ECC error for writeback";
687static const char CHAFSR_CPC_msg[] =
688 "HW corrected ECC error for copyout";
689static const char CHAFSR_TO_msg[] =
690 "Unmapped error from system bus";
691static const char CHAFSR_BERR_msg[] =
692 "Bus error response from system bus";
693static const char CHAFSR_IVC_msg[] =
694 "HW corrected system bus data ECC error for ivec read";
695static const char CHAFSR_IVU_msg[] =
696 "Uncorrectable system bus data ECC error for ivec read";
697static 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 },
718 { 0, NULL },
719};
720static const char CHPAFSR_DTO_msg[] =
721 "System bus unmapped error for prefetch/storequeue-read";
722static const char CHPAFSR_DBERR_msg[] =
723 "System bus error for prefetch/storequeue-read";
724static const char CHPAFSR_THCE_msg[] =
725 "Hardware corrected E-cache Tag ECC error";
726static const char CHPAFSR_TSCE_msg[] =
727 "SW handled correctable E-cache Tag ECC error";
728static const char CHPAFSR_TUE_msg[] =
729 "Uncorrectable E-cache Tag ECC error";
730static const char CHPAFSR_DUE_msg[] =
731 "System bus uncorrectable data ECC error due to prefetch/store-fill";
732static 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 },
759 { 0, NULL },
760};
761static const char JPAFSR_JETO_msg[] =
762 "System interface protocol error, hw timeout caused";
763static const char JPAFSR_SCE_msg[] =
764 "Parity error on system snoop results";
765static const char JPAFSR_JEIC_msg[] =
766 "System interface protocol error, illegal command detected";
767static const char JPAFSR_JEIT_msg[] =
768 "System interface protocol error, illegal ADTYPE detected";
769static const char JPAFSR_OM_msg[] =
770 "Out of range memory error has occurred";
771static const char JPAFSR_ETP_msg[] =
772 "Parity error on L2 cache tag SRAM";
773static const char JPAFSR_UMS_msg[] =
774 "Error due to unsupported store";
775static const char JPAFSR_RUE_msg[] =
776 "Uncorrectable ECC error from remote cache/memory";
777static const char JPAFSR_RCE_msg[] =
778 "Correctable ECC error from remote cache/memory";
779static const char JPAFSR_BP_msg[] =
780 "JBUS parity error on returned read data";
781static const char JPAFSR_WBP_msg[] =
782 "JBUS parity error on data for writeback or block store";
783static const char JPAFSR_FRC_msg[] =
784 "Foreign read to DRAM incurring correctable ECC error";
785static const char JPAFSR_FRU_msg[] =
786 "Foreign read to DRAM incurring uncorrectable ECC error";
787static 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 },
818 { 0, NULL },
819};
820static struct afsr_error_table *cheetah_error_table;
821static unsigned long cheetah_afsr_errors;
822
823struct cheetah_err_info *cheetah_error_log;
824
825static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
826{
827 struct cheetah_err_info *p;
828 int cpu = smp_processor_id();
829
830 if (!cheetah_error_log)
831 return NULL;
832
833 p = cheetah_error_log + (cpu * 2);
834 if ((afsr & CHAFSR_TL1) != 0UL)
835 p++;
836
837 return p;
838}
839
840extern unsigned int tl0_icpe[], tl1_icpe[];
841extern unsigned int tl0_dcpe[], tl1_dcpe[];
842extern unsigned int tl0_fecc[], tl1_fecc[];
843extern unsigned int tl0_cee[], tl1_cee[];
844extern unsigned int tl0_iae[], tl1_iae[];
845extern unsigned int tl0_dae[], tl1_dae[];
846extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
847extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
848extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
849extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
850extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
851
852void __init cheetah_ecache_flush_init(void)
853{
854 unsigned long largest_size, smallest_linesize, order, ver;
855 int i, sz;
856
857 /* Scan all cpu device tree nodes, note two values:
858 * 1) largest E-cache size
859 * 2) smallest E-cache line size
860 */
861 largest_size = 0UL;
862 smallest_linesize = ~0UL;
863
864 for (i = 0; i < NR_CPUS; i++) {
865 unsigned long val;
866
867 val = cpu_data(i).ecache_size;
868 if (!val)
869 continue;
870
871 if (val > largest_size)
872 largest_size = val;
873
874 val = cpu_data(i).ecache_line_size;
875 if (val < smallest_linesize)
876 smallest_linesize = val;
877
878 }
879
880 if (largest_size == 0UL || smallest_linesize == ~0UL) {
881 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
882 "parameters.\n");
883 prom_halt();
884 }
885
886 ecache_flush_size = (2 * largest_size);
887 ecache_flush_linesize = smallest_linesize;
888
889 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
890
891 if (ecache_flush_physbase == ~0UL) {
892 prom_printf("cheetah_ecache_flush_init: Cannot find %ld byte "
893 "contiguous physical memory.\n",
894 ecache_flush_size);
895 prom_halt();
896 }
897
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)
902 break;
903 }
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);
909 prom_halt();
910 }
911 memset(cheetah_error_log, 0, PAGE_SIZE << order);
912
913 /* Mark all AFSRs as invalid so that the trap handler will
914 * log new new information there.
915 */
916 for (i = 0; i < 2 * NR_CPUS; i++)
917 cheetah_error_log[i].afsr = CHAFSR_INVALID;
918
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;
927 } else {
928 cheetah_error_table = &__cheetah_error_table[0];
929 cheetah_afsr_errors = CHAFSR_ERRORS;
930 }
931
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));
946 }
947 flushi(PAGE_OFFSET);
948}
949
950static void cheetah_flush_ecache(void)
951{
952 unsigned long flush_base = ecache_flush_physbase;
953 unsigned long flush_linesize = ecache_flush_linesize;
954 unsigned long flush_size = ecache_flush_size;
955
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"
959 : "=&r" (flush_size)
960 : "0" (flush_size), "r" (flush_base),
961 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
962}
963
964static void cheetah_flush_ecache_line(unsigned long physaddr)
965{
966 unsigned long alias;
967
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"
974 "membar #Sync"
975 : /* no outputs */
976 : "r" (physaddr), "r" (alias),
977 "i" (ASI_PHYS_USE_EC));
978}
979
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.
982 *
983 * So we must only flush the I-cache when it is disabled.
984 */
985static void __cheetah_flush_icache(void)
986{
987 unsigned int icache_size, icache_line_size;
988 unsigned long addr;
989
990 icache_size = local_cpu_data().icache_size;
991 icache_line_size = local_cpu_data().icache_line_size;
992
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"
996 "membar #Sync"
997 : /* no outputs */
998 : "r" (addr | (2 << 3)),
999 "i" (ASI_IC_TAG));
1000 }
1001}
1002
1003static void cheetah_flush_icache(void)
1004{
1005 unsigned long dcu_save;
1006
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"
1011 "membar #Sync"
1012 : "=r" (dcu_save)
1013 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
1014 : "g1");
1015
1016 __cheetah_flush_icache();
1017
1018 /* Restore DCU register */
1019 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1020 "membar #Sync"
1021 : /* no outputs */
1022 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
1023}
1024
1025static void cheetah_flush_dcache(void)
1026{
1027 unsigned int dcache_size, dcache_line_size;
1028 unsigned long addr;
1029
1030 dcache_size = local_cpu_data().dcache_size;
1031 dcache_line_size = local_cpu_data().dcache_line_size;
1032
1033 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1034 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
1035 "membar #Sync"
1036 : /* no outputs */
1037 : "r" (addr), "i" (ASI_DCACHE_TAG));
1038 }
1039}
1040
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.
1045 */
1046static void cheetah_plus_zap_dcache_parity(void)
1047{
1048 unsigned int dcache_size, dcache_line_size;
1049 unsigned long addr;
1050
1051 dcache_size = local_cpu_data().dcache_size;
1052 dcache_line_size = local_cpu_data().dcache_line_size;
1053
1054 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1055 unsigned long tag = (addr >> 14);
1056 unsigned long line;
1057
1058 __asm__ __volatile__("membar #Sync\n\t"
1059 "stxa %0, [%1] %2\n\t"
1060 "membar #Sync"
1061 : /* no outputs */
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"
1067 "membar #Sync"
1068 : /* no outputs */
1069 : "r" (line),
1070 "i" (ASI_DCACHE_DATA));
1071 }
1072}
1073
1074/* Conversion tables used to frob Cheetah AFSR syndrome values into
1075 * something palatable to the memory controller driver get_unumber
1076 * routine.
1077 */
1078#define MT0 137
1079#define MT1 138
1080#define MT2 139
1081#define NONE 254
1082#define MTC0 140
1083#define MTC1 141
1084#define MTC2 142
1085#define MTC3 143
1086#define C0 128
1087#define C1 129
1088#define C2 130
1089#define C3 131
1090#define C4 132
1091#define C5 133
1092#define C6 134
1093#define C7 135
1094#define C8 136
1095#define M2 144
1096#define M3 145
1097#define M4 146
1098#define M 147
1099static 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
1132};
1133static unsigned char cheetah_mtag_syntab[] = {
1134 NONE, MTC0,
1135 MTC1, NONE,
1136 MTC2, NONE,
1137 NONE, MT0,
1138 MTC3, NONE,
1139 NONE, MT1,
1140 NONE, MT2,
1141 NONE, NONE
1142};
1143
1144/* Return the highest priority error conditon mentioned. */
1145static inline unsigned long cheetah_get_hipri(unsigned long afsr)
1146{
1147 unsigned long tmp = 0;
1148 int i;
1149
1150 for (i = 0; cheetah_error_table[i].mask; i++) {
1151 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1152 return tmp;
1153 }
1154 return tmp;
1155}
1156
1157static const char *cheetah_get_string(unsigned long bit)
1158{
1159 int i;
1160
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;
1164 }
1165 return "???";
1166}
1167
1168static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1169 unsigned long afsr, unsigned long afar, int recoverable)
1170{
1171 unsigned long hipri;
1172 char unum[256];
1173
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(),
1176 afsr, afar,
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));
1194
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) {
1204 int syndrome;
1205 int ret;
1206
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));
1210 if (ret != -1)
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) {
1215 int syndrome;
1216 int ret;
1217
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));
1221 if (ret != -1)
1222 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1223 (recoverable ? KERN_WARNING : KERN_CRIT),
1224 smp_processor_id(), unum);
1225 }
1226
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,
1231 info->dcache_tag,
1232 info->dcache_utag,
1233 info->dcache_stag);
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,
1244 info->icache_tag,
1245 info->icache_utag,
1246 info->icache_stag,
1247 info->icache_upper,
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]);
1270
1271 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1272 while (afsr != 0UL) {
1273 unsigned long bit = cheetah_get_hipri(afsr);
1274
1275 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1276 (recoverable ? KERN_WARNING : KERN_CRIT),
1277 bit, cheetah_get_string(bit));
1278
1279 afsr &= ~bit;
1280 }
1281
1282 if (!recoverable)
1283 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1284}
1285
1286static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1287{
1288 unsigned long afsr, afar;
1289 int ret = 0;
1290
1291 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1292 : "=r" (afsr)
1293 : "i" (ASI_AFSR));
1294 if ((afsr & cheetah_afsr_errors) != 0) {
1295 if (logp != NULL) {
1296 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1297 : "=r" (afar)
1298 : "i" (ASI_AFAR));
1299 logp->afsr = afsr;
1300 logp->afar = afar;
1301 }
1302 ret = 1;
1303 }
1304 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1305 "membar #Sync\n\t"
1306 : : "r" (afsr), "i" (ASI_AFSR));
1307
1308 return ret;
1309}
1310
1311void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1312{
1313 struct cheetah_err_info local_snapshot, *p;
1314 int recoverable;
1315
1316 /* Flush E-cache */
1317 cheetah_flush_ecache();
1318
1319 p = cheetah_get_error_log(afsr);
1320 if (!p) {
1321 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1322 afsr, afar);
1323 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1324 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1325 prom_halt();
1326 }
1327
1328 /* Grab snapshot of logged error. */
1329 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1330
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.
1334 *
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.
1337 */
1338 if (p->afsr != afsr || p->afar != afar)
1339 local_snapshot.afsr = CHAFSR_INVALID;
1340 else
1341 p->afsr = CHAFSR_INVALID;
1342
1343 cheetah_flush_icache();
1344 cheetah_flush_dcache();
1345
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"
1350 "membar #Sync"
1351 : /* no outputs */
1352 : "i" (ASI_DCU_CONTROL_REG),
1353 "i" (DCU_DC | DCU_IC)
1354 : "g1");
1355
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"
1360 "membar #Sync"
1361 : /* no outputs */
1362 : "i" (ASI_ESTATE_ERROR_EN),
1363 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1364 : "g1");
1365
1366 /* Decide if we can continue after handling this trap and
1367 * logging the error.
1368 */
1369 recoverable = 1;
1370 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1371 recoverable = 0;
1372
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.
1375 */
1376 if (cheetah_recheck_errors(&local_snapshot)) {
1377 unsigned long new_afsr = local_snapshot.afsr;
1378
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))
1384 recoverable = 0;
1385 }
1386
1387 /* Log errors. */
1388 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1389
1390 if (!recoverable)
1391 panic("Irrecoverable Fast-ECC error trap.\n");
1392
1393 /* Flush E-cache to kick the error trap handlers out. */
1394 cheetah_flush_ecache();
1395}
1396
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.
1400 */
1401static int cheetah_fix_ce(unsigned long physaddr)
1402{
1403 unsigned long orig_estate;
1404 unsigned long alias1, alias2;
1405 int ret;
1406
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"
1411 "membar #Sync"
1412 : "=&r" (orig_estate)
1413 : "i" (ESTATE_ERROR_CEEN),
1414 "i" (ASI_ESTATE_ERROR_EN)
1415 : "g1");
1416
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.
1423 */
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"
1433 "membar #Sync"
1434 : /* no outputs */
1435 : "r" (alias1), "r" (alias2),
1436 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1437
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"
1442 "membar #Sync"
1443 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1444 if (cheetah_recheck_errors(NULL))
1445 ret = 2;
1446 else
1447 ret = 1;
1448 } else {
1449 /* No new error, intermittent problem. */
1450 ret = 0;
1451 }
1452
1453 /* Restore error enables. */
1454 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1455 "membar #Sync"
1456 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1457
1458 return ret;
1459}
1460
1461/* Return non-zero if PADDR is a valid physical memory address. */
1462static int cheetah_check_main_memory(unsigned long paddr)
1463{
1464 unsigned long vaddr = PAGE_OFFSET + paddr;
1465
1466 if (vaddr > (unsigned long) high_memory)
1467 return 0;
1468
1469 return kern_addr_valid(vaddr);
1470}
1471
1472void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1473{
1474 struct cheetah_err_info local_snapshot, *p;
1475 int recoverable, is_memory;
1476
1477 p = cheetah_get_error_log(afsr);
1478 if (!p) {
1479 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1480 afsr, afar);
1481 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1482 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1483 prom_halt();
1484 }
1485
1486 /* Grab snapshot of logged error. */
1487 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1488
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.
1492 *
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.
1495 */
1496 if (p->afsr != afsr || p->afar != afar)
1497 local_snapshot.afsr = CHAFSR_INVALID;
1498 else
1499 p->afsr = CHAFSR_INVALID;
1500
1501 is_memory = cheetah_check_main_memory(afar);
1502
1503 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1504 /* XXX Might want to log the results of this operation
1505 * XXX somewhere... -DaveM
1506 */
1507 cheetah_fix_ce(afar);
1508 }
1509
1510 {
1511 int flush_all, flush_line;
1512
1513 flush_all = flush_line = 0;
1514 if ((afsr & CHAFSR_EDC) != 0UL) {
1515 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1516 flush_line = 1;
1517 else
1518 flush_all = 1;
1519 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1520 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1521 flush_line = 1;
1522 else
1523 flush_all = 1;
1524 }
1525
1526 /* Trap handler only disabled I-cache, flush it. */
1527 cheetah_flush_icache();
1528
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"
1533 "membar #Sync"
1534 : /* no outputs */
1535 : "i" (ASI_DCU_CONTROL_REG),
1536 "i" (DCU_IC)
1537 : "g1");
1538
1539 if (flush_all)
1540 cheetah_flush_ecache();
1541 else if (flush_line)
1542 cheetah_flush_ecache_line(afar);
1543 }
1544
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"
1549 "membar #Sync"
1550 : /* no outputs */
1551 : "i" (ASI_ESTATE_ERROR_EN),
1552 "i" (ESTATE_ERROR_CEEN)
1553 : "g1");
1554
1555 /* Decide if we can continue after handling this trap and
1556 * logging the error.
1557 */
1558 recoverable = 1;
1559 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1560 recoverable = 0;
1561
1562 /* Re-check AFSR/AFAR */
1563 (void) cheetah_recheck_errors(&local_snapshot);
1564
1565 /* Log errors. */
1566 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1567
1568 if (!recoverable)
1569 panic("Irrecoverable Correctable-ECC error trap.\n");
1570}
1571
1572void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1573{
1574 struct cheetah_err_info local_snapshot, *p;
1575 int recoverable, is_memory;
1576
1577#ifdef CONFIG_PCI
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();
1582
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"
1587 "membar #Sync"
1588 : /* no outputs */
1589 : "i" (ASI_DCU_CONTROL_REG),
1590 "i" (DCU_DC | DCU_IC)
1591 : "g1");
1592
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"
1597 "membar #Sync"
1598 : /* no outputs */
1599 : "i" (ASI_ESTATE_ERROR_EN),
1600 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1601 : "g1");
1602
1603 (void) cheetah_recheck_errors(NULL);
1604
1605 pci_poke_faulted = 1;
1606 regs->tpc += 4;
1607 regs->tnpc = regs->tpc + 4;
1608 return;
1609 }
1610#endif
1611
1612 p = cheetah_get_error_log(afsr);
1613 if (!p) {
1614 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1615 afsr, afar);
1616 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1617 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1618 prom_halt();
1619 }
1620
1621 /* Grab snapshot of logged error. */
1622 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1623
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.
1627 *
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.
1630 */
1631 if (p->afsr != afsr || p->afar != afar)
1632 local_snapshot.afsr = CHAFSR_INVALID;
1633 else
1634 p->afsr = CHAFSR_INVALID;
1635
1636 is_memory = cheetah_check_main_memory(afar);
1637
1638 {
1639 int flush_all, flush_line;
1640
1641 flush_all = flush_line = 0;
1642 if ((afsr & CHAFSR_EDU) != 0UL) {
1643 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1644 flush_line = 1;
1645 else
1646 flush_all = 1;
1647 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1648 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1649 flush_line = 1;
1650 else
1651 flush_all = 1;
1652 }
1653
1654 cheetah_flush_icache();
1655 cheetah_flush_dcache();
1656
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"
1661 "membar #Sync"
1662 : /* no outputs */
1663 : "i" (ASI_DCU_CONTROL_REG),
1664 "i" (DCU_IC | DCU_DC)
1665 : "g1");
1666
1667 if (flush_all)
1668 cheetah_flush_ecache();
1669 else if (flush_line)
1670 cheetah_flush_ecache_line(afar);
1671 }
1672
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"
1677 "membar #Sync"
1678 : /* no outputs */
1679 : "i" (ASI_ESTATE_ERROR_EN),
1680 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1681 : "g1");
1682
1683 /* Decide if we can continue after handling this trap and
1684 * logging the error.
1685 */
1686 recoverable = 1;
1687 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1688 recoverable = 0;
1689
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.
1692 */
1693 if (cheetah_recheck_errors(&local_snapshot)) {
1694 unsigned long new_afsr = local_snapshot.afsr;
1695
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))
1701 recoverable = 0;
1702 }
1703
1704 /* Log errors. */
1705 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1706
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
1713 * space).
1714 *
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.
1718 */
1719 if (recoverable && is_memory) {
1720 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1721 /* OK, usermode access. */
1722 recoverable = 1;
1723 } else {
1724 const struct exception_table_entry *entry;
1725
1726 entry = search_exception_tables(regs->tpc);
1727 if (entry) {
1728 /* OK, kernel access to userspace. */
1729 recoverable = 1;
1730
1731 } else {
1732 /* BAD, privileged state is corrupted. */
1733 recoverable = 0;
1734 }
1735
1736 if (recoverable) {
1737 if (pfn_valid(afar >> PAGE_SHIFT))
1738 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1739 else
1740 recoverable = 0;
1741
1742 /* Only perform fixup if we still have a
1743 * recoverable condition.
1744 */
1745 if (recoverable) {
1746 regs->tpc = entry->fixup;
1747 regs->tnpc = regs->tpc + 4;
1748 }
1749 }
1750 }
1751 } else {
1752 recoverable = 0;
1753 }
1754
1755 if (!recoverable)
1756 panic("Irrecoverable deferred error trap.\n");
1757}
1758
1759/* Handle a D/I cache parity error trap. TYPE is encoded as:
1760 *
1761 * Bit0: 0=dcache,1=icache
1762 * Bit1: 0=recoverable,1=unrecoverable
1763 *
1764 * The hardware has disabled both the I-cache and D-cache in
1765 * the %dcr register.
1766 */
1767void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1768{
1769 if (type & 0x1)
1770 __cheetah_flush_icache();
1771 else
1772 cheetah_plus_zap_dcache_parity();
1773 cheetah_flush_dcache();
1774
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"
1779 "membar #Sync"
1780 : /* no outputs */
1781 : "i" (ASI_DCU_CONTROL_REG),
1782 "i" (DCU_DC | DCU_IC)
1783 : "g1");
1784
1785 if (type & 0x2) {
1786 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1787 smp_processor_id(),
1788 (type & 0x1) ? 'I' : 'D',
1789 regs->tpc);
1790 printk(KERN_EMERG "TPC<%pS>\n", (void *) regs->tpc);
1791 panic("Irrecoverable Cheetah+ parity error.");
1792 }
1793
1794 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1795 smp_processor_id(),
1796 (type & 0x1) ? 'I' : 'D',
1797 regs->tpc);
1798 printk(KERN_WARNING "TPC<%pS>\n", (void *) regs->tpc);
1799}
1800
1801struct sun4v_error_entry {
1802 /* Unique error handle */
1803/*0x00*/u64 err_handle;
1804
1805 /* %stick value at the time of the error */
1806/*0x08*/u64 err_stick;
1807
1808/*0x10*/u8 reserved_1[3];
1809
1810 /* Error type */
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
1820
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
1838
1839#define SUN4V_ERR_SPSTATE_FAULTED 0
1840#define SUN4V_ERR_SPSTATE_AVAILABLE 1
1841#define SUN4V_ERR_SPSTATE_NOT_PRESENT 2
1842
1843#define SUN4V_ERR_MODE_USER 1
1844#define SUN4V_ERR_MODE_PRIV 2
1845
1846 /* Real address of the memory region or PIO transaction */
1847/*0x18*/u64 err_raddr;
1848
1849 /* Size of the operation triggering the error, in bytes */
1850/*0x20*/u32 err_size;
1851
1852 /* ID of the CPU */
1853/*0x24*/u16 err_cpu;
1854
1855 /* Grace periof for shutdown, in seconds */
1856/*0x26*/u16 err_secs;
1857
1858 /* Value of the %asi register */
1859/*0x28*/u8 err_asi;
1860
1861/*0x29*/u8 reserved_2;
1862
1863 /* Value of the ASR register number */
1864/*0x2a*/u16 err_asr;
1865#define SUN4V_ERR_ASR_VALID 0x8000
1866
1867/*0x2c*/u32 reserved_3;
1868/*0x30*/u64 reserved_4;
1869/*0x38*/u64 reserved_5;
1870};
1871
1872static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1873static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1874
1875static const char *sun4v_err_type_to_str(u8 type)
1876{
1877 static const char *types[SUN4V_ERR_TYPE_NUM] = {
1878 "undefined",
1879 "uncorrected resumable",
1880 "precise nonresumable",
1881 "deferred nonresumable",
1882 "shutdown request",
1883 "dump core",
1884 "SP state change",
1885 };
1886
1887 if (type < SUN4V_ERR_TYPE_NUM)
1888 return types[type];
1889
1890 return "unknown";
1891}
1892
1893static void sun4v_emit_err_attr_strings(u32 attrs)
1894{
1895 static const char *attr_names[] = {
1896 "processor",
1897 "memory",
1898 "PIO",
1899 "int-registers",
1900 "fpu-registers",
1901 "shutdown-request",
1902 "ASR",
1903 "ASI",
1904 "priv-reg",
1905 };
1906 static const char *sp_states[] = {
1907 "sp-faulted",
1908 "sp-available",
1909 "sp-not-present",
1910 "sp-state-reserved",
1911 };
1912 static const char *modes[] = {
1913 "mode-reserved0",
1914 "user",
1915 "priv",
1916 "mode-reserved1",
1917 };
1918 u32 sp_state, mode;
1919 int i;
1920
1921 for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
1922 if (attrs & (1U << i)) {
1923 const char *s = attr_names[i];
1924
1925 pr_cont("%s ", s);
1926 }
1927 }
1928
1929 sp_state = ((attrs & SUN4V_ERR_ATTRS_SPSTATE_MSK) >>
1930 SUN4V_ERR_ATTRS_SPSTATE_SHFT);
1931 pr_cont("%s ", sp_states[sp_state]);
1932
1933 mode = ((attrs & SUN4V_ERR_ATTRS_MODE_MSK) >>
1934 SUN4V_ERR_ATTRS_MODE_SHFT);
1935 pr_cont("%s ", modes[mode]);
1936
1937 if (attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL)
1938 pr_cont("res-queue-full ");
1939}
1940
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.
1947 */
1948static void sun4v_report_real_raddr(const char *pfx, struct pt_regs *regs)
1949{
1950 unsigned int insn;
1951 u64 addr;
1952
1953 if (!(regs->tstate & TSTATE_PRIV))
1954 return;
1955
1956 insn = *(unsigned int *) regs->tpc;
1957
1958 addr = compute_effective_address(regs, insn, 0);
1959
1960 printk("%s: insn effective address [0x%016llx]\n",
1961 pfx, addr);
1962}
1963
1964static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent,
1965 int cpu, const char *pfx, atomic_t *ocnt)
1966{
1967 u64 *raw_ptr = (u64 *) ent;
1968 u32 attrs;
1969 int cnt;
1970
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);
1974
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]);
1979
1980 printk("%s: handle [0x%016llx] stick [0x%016llx]\n",
1981 pfx, ent->err_handle, ent->err_stick);
1982
1983 printk("%s: type [%s]\n", pfx, sun4v_err_type_to_str(ent->err_type));
1984
1985 attrs = ent->err_attrs;
1986 printk("%s: attrs [0x%08x] < ", pfx, attrs);
1987 sun4v_emit_err_attr_strings(attrs);
1988 pr_cont(">\n");
1989
1990 /* Various fields in the error report are only valid if
1991 * certain attribute bits are set.
1992 */
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);
1997
1998 if (ent->err_raddr == ~(u64)0)
1999 sun4v_report_real_raddr(pfx, regs);
2000 }
2001
2002 if (attrs & (SUN4V_ERR_ATTRS_MEMORY | SUN4V_ERR_ATTRS_ASI))
2003 printk("%s: size [0x%x]\n", pfx, ent->err_size);
2004
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);
2010
2011 if (attrs & SUN4V_ERR_ATTRS_ASI)
2012 printk("%s: asi [0x%02x]\n", pfx, ent->err_asi);
2013
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);
2020
2021 show_regs(regs);
2022
2023 if ((cnt = atomic_read(ocnt)) != 0) {
2024 atomic_set(ocnt, 0);
2025 wmb();
2026 printk("%s: Queue overflowed %d times.\n",
2027 pfx, cnt);
2028 }
2029}
2030
2031/* Handle memory corruption detected error which is vectored in
2032 * through resumable error trap.
2033 */
2034void do_mcd_err(struct pt_regs *regs, struct sun4v_error_entry ent)
2035{
2036 if (notify_die(DIE_TRAP, "MCD error", regs, 0, 0x34,
2037 SIGSEGV) == NOTIFY_STOP)
2038 return;
2039
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.
2050 */
2051 const struct exception_table_entry *entry;
2052
2053 entry = search_exception_tables(regs->tpc);
2054 if (entry) {
2055 /* Looks like a bad syscall parameter */
2056#ifdef DEBUG_EXCEPTIONS
2057 pr_emerg("Exception: PC<%016lx> faddr<UNKNOWN>\n",
2058 regs->tpc);
2059 pr_emerg("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
2060 ent.err_raddr, entry->fixup);
2061#endif
2062 regs->tpc = entry->fixup;
2063 regs->tnpc = regs->tpc + 4;
2064 return;
2065 }
2066 }
2067
2068 /* Send SIGSEGV to the userspace process with the right signal
2069 * code
2070 */
2071 force_sig_fault(SIGSEGV, SEGV_ADIDERR, (void __user *)ent.err_raddr);
2072}
2073
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.
2076 */
2077void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
2078{
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;
2083 int cpu;
2084
2085 cpu = get_cpu();
2086
2087 tb = &trap_block[cpu];
2088 paddr = tb->resum_kernel_buf_pa + offset;
2089 ent = __va(paddr);
2090
2091 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
2092
2093 /* We have a local copy now, so release the entry. */
2094 ent->err_handle = 0;
2095 wmb();
2096
2097 put_cpu();
2098
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.
2104 */
2105 pr_info("Shutdown request, %u seconds...\n",
2106 local_copy.err_secs);
2107 orderly_poweroff(true);
2108 goto out;
2109 }
2110
2111 /* If this is a memory corruption detected error vectored in
2112 * by HV through resumable error trap, call the handler
2113 */
2114 if (local_copy.err_attrs & SUN4V_ERR_ATTRS_MCD) {
2115 do_mcd_err(regs, local_copy);
2116 return;
2117 }
2118
2119 sun4v_log_error(regs, &local_copy, cpu,
2120 KERN_ERR "RESUMABLE ERROR",
2121 &sun4v_resum_oflow_cnt);
2122out:
2123 exception_exit(prev_state);
2124}
2125
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.
2129 */
2130void sun4v_resum_overflow(struct pt_regs *regs)
2131{
2132 atomic_inc(&sun4v_resum_oflow_cnt);
2133}
2134
2135/* Given a set of registers, get the virtual addressi that was being accessed
2136 * by the faulting instructions at tpc.
2137 */
2138static unsigned long sun4v_get_vaddr(struct pt_regs *regs)
2139{
2140 unsigned int insn;
2141
2142 if (!copy_from_user(&insn, (void __user *)regs->tpc, 4)) {
2143 return compute_effective_address(regs, insn,
2144 (insn >> 25) & 0x1f);
2145 }
2146 return 0;
2147}
2148
2149/* Attempt to handle non-resumable errors generated from userspace.
2150 * Returns true if the signal was handled, false otherwise.
2151 */
2152bool sun4v_nonresum_error_user_handled(struct pt_regs *regs,
2153 struct sun4v_error_entry *ent) {
2154
2155 unsigned int attrs = ent->err_attrs;
2156
2157 if (attrs & SUN4V_ERR_ATTRS_MEMORY) {
2158 unsigned long addr = ent->err_raddr;
2159
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");
2163 } else {
2164 unsigned long page_cnt = DIV_ROUND_UP(ent->err_size,
2165 PAGE_SIZE);
2166
2167 /* Break the unfortunate news. */
2168 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Memory failed at %016lX\n",
2169 addr);
2170 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Claiming %lu ages.\n",
2171 page_cnt);
2172
2173 while (page_cnt-- > 0) {
2174 if (pfn_valid(addr >> PAGE_SHIFT))
2175 get_page(pfn_to_page(addr >> PAGE_SHIFT));
2176 addr += PAGE_SIZE;
2177 }
2178 }
2179 force_sig(SIGKILL);
2180
2181 return true;
2182 }
2183 if (attrs & SUN4V_ERR_ATTRS_PIO) {
2184 force_sig_fault(SIGBUS, BUS_ADRERR,
2185 (void __user *)sun4v_get_vaddr(regs));
2186 return true;
2187 }
2188
2189 /* Default to doing nothing */
2190 return false;
2191}
2192
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.
2195 */
2196void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
2197{
2198 struct sun4v_error_entry *ent, local_copy;
2199 struct trap_per_cpu *tb;
2200 unsigned long paddr;
2201 int cpu;
2202
2203 cpu = get_cpu();
2204
2205 tb = &trap_block[cpu];
2206 paddr = tb->nonresum_kernel_buf_pa + offset;
2207 ent = __va(paddr);
2208
2209 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
2210
2211 /* We have a local copy now, so release the entry. */
2212 ent->err_handle = 0;
2213 wmb();
2214
2215 put_cpu();
2216
2217 if (!(regs->tstate & TSTATE_PRIV) &&
2218 sun4v_nonresum_error_user_handled(regs, &local_copy)) {
2219 /* DON'T PANIC: This userspace error was handled. */
2220 return;
2221 }
2222
2223#ifdef CONFIG_PCI
2224 /* Check for the special PCI poke sequence. */
2225 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
2226 pci_poke_faulted = 1;
2227 regs->tpc += 4;
2228 regs->tnpc = regs->tpc + 4;
2229 return;
2230 }
2231#endif
2232
2233 sun4v_log_error(regs, &local_copy, cpu,
2234 KERN_EMERG "NON-RESUMABLE ERROR",
2235 &sun4v_nonresum_oflow_cnt);
2236
2237 panic("Non-resumable error.");
2238}
2239
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.
2243 */
2244void sun4v_nonresum_overflow(struct pt_regs *regs)
2245{
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?
2248 */
2249 atomic_inc(&sun4v_nonresum_oflow_cnt);
2250}
2251
2252static void sun4v_tlb_error(struct pt_regs *regs)
2253{
2254 die_if_kernel("TLB/TSB error", regs);
2255}
2256
2257unsigned long sun4v_err_itlb_vaddr;
2258unsigned long sun4v_err_itlb_ctx;
2259unsigned long sun4v_err_itlb_pte;
2260unsigned long sun4v_err_itlb_error;
2261
2262void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
2263{
2264 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2265
2266 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
2267 regs->tpc, tl);
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);
2276
2277 sun4v_tlb_error(regs);
2278}
2279
2280unsigned long sun4v_err_dtlb_vaddr;
2281unsigned long sun4v_err_dtlb_ctx;
2282unsigned long sun4v_err_dtlb_pte;
2283unsigned long sun4v_err_dtlb_error;
2284
2285void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
2286{
2287 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2288
2289 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
2290 regs->tpc, tl);
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);
2299
2300 sun4v_tlb_error(regs);
2301}
2302
2303void hypervisor_tlbop_error(unsigned long err, unsigned long op)
2304{
2305 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
2306 err, op);
2307}
2308
2309void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
2310{
2311 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
2312 err, op);
2313}
2314
2315static void do_fpe_common(struct pt_regs *regs)
2316{
2317 if (regs->tstate & TSTATE_PRIV) {
2318 regs->tpc = regs->tnpc;
2319 regs->tnpc += 4;
2320 } else {
2321 unsigned long fsr = current_thread_info()->xfsr[0];
2322 int code;
2323
2324 if (test_thread_flag(TIF_32BIT)) {
2325 regs->tpc &= 0xffffffff;
2326 regs->tnpc &= 0xffffffff;
2327 }
2328 code = FPE_FLTUNK;
2329 if ((fsr & 0x1c000) == (1 << 14)) {
2330 if (fsr & 0x10)
2331 code = FPE_FLTINV;
2332 else if (fsr & 0x08)
2333 code = FPE_FLTOVF;
2334 else if (fsr & 0x04)
2335 code = FPE_FLTUND;
2336 else if (fsr & 0x02)
2337 code = FPE_FLTDIV;
2338 else if (fsr & 0x01)
2339 code = FPE_FLTRES;
2340 }
2341 force_sig_fault(SIGFPE, code, (void __user *)regs->tpc);
2342 }
2343}
2344
2345void do_fpieee(struct pt_regs *regs)
2346{
2347 enum ctx_state prev_state = exception_enter();
2348
2349 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2350 0, 0x24, SIGFPE) == NOTIFY_STOP)
2351 goto out;
2352
2353 do_fpe_common(regs);
2354out:
2355 exception_exit(prev_state);
2356}
2357
2358void do_fpother(struct pt_regs *regs)
2359{
2360 enum ctx_state prev_state = exception_enter();
2361 struct fpustate *f = FPUSTATE;
2362 int ret = 0;
2363
2364 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2365 0, 0x25, SIGFPE) == NOTIFY_STOP)
2366 goto out;
2367
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);
2372 break;
2373 }
2374 if (ret)
2375 goto out;
2376 do_fpe_common(regs);
2377out:
2378 exception_exit(prev_state);
2379}
2380
2381void do_tof(struct pt_regs *regs)
2382{
2383 enum ctx_state prev_state = exception_enter();
2384
2385 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2386 0, 0x26, SIGEMT) == NOTIFY_STOP)
2387 goto out;
2388
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;
2394 }
2395 force_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)regs->tpc);
2396out:
2397 exception_exit(prev_state);
2398}
2399
2400void do_div0(struct pt_regs *regs)
2401{
2402 enum ctx_state prev_state = exception_enter();
2403
2404 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2405 0, 0x28, SIGFPE) == NOTIFY_STOP)
2406 goto out;
2407
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;
2413 }
2414 force_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)regs->tpc);
2415out:
2416 exception_exit(prev_state);
2417}
2418
2419static void instruction_dump(unsigned int *pc)
2420{
2421 int i;
2422
2423 if ((((unsigned long) pc) & 3))
2424 return;
2425
2426 printk("Instruction DUMP:");
2427 for (i = -3; i < 6; i++)
2428 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2429 printk("\n");
2430}
2431
2432static void user_instruction_dump(unsigned int __user *pc)
2433{
2434 int i;
2435 unsigned int buf[9];
2436
2437 if ((((unsigned long) pc) & 3))
2438 return;
2439
2440 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2441 return;
2442
2443 printk("Instruction DUMP:");
2444 for (i = 0; i < 9; i++)
2445 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2446 printk("\n");
2447}
2448
2449void show_stack(struct task_struct *tsk, unsigned long *_ksp, const char *loglvl)
2450{
2451 unsigned long fp, ksp;
2452 struct thread_info *tp;
2453 int count = 0;
2454#ifdef CONFIG_FUNCTION_GRAPH_TRACER
2455 int graph = 0;
2456#endif
2457
2458 ksp = (unsigned long) _ksp;
2459 if (!tsk)
2460 tsk = current;
2461 tp = task_thread_info(tsk);
2462 if (ksp == 0UL) {
2463 if (tsk == current)
2464 asm("mov %%fp, %0" : "=r" (ksp));
2465 else
2466 ksp = tp->ksp;
2467 }
2468 if (tp == current_thread_info())
2469 flushw_all();
2470
2471 fp = ksp + STACK_BIAS;
2472
2473 printk("%sCall Trace:\n", loglvl);
2474 do {
2475 struct sparc_stackf *sf;
2476 struct pt_regs *regs;
2477 unsigned long pc;
2478
2479 if (!kstack_valid(tp, fp))
2480 break;
2481 sf = (struct sparc_stackf *) fp;
2482 regs = (struct pt_regs *) (sf + 1);
2483
2484 if (kstack_is_trap_frame(tp, regs)) {
2485 if (!(regs->tstate & TSTATE_PRIV))
2486 break;
2487 pc = regs->tpc;
2488 fp = regs->u_regs[UREG_I6] + STACK_BIAS;
2489 } else {
2490 pc = sf->callers_pc;
2491 fp = (unsigned long)sf->fp + STACK_BIAS;
2492 }
2493
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);
2499 if (ret_stack) {
2500 pc = ret_stack->ret;
2501 print_ip_sym(loglvl, pc);
2502 graph++;
2503 }
2504 }
2505#endif
2506 } while (++count < 16);
2507}
2508
2509static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2510{
2511 unsigned long fp = rw->ins[6];
2512
2513 if (!fp)
2514 return NULL;
2515
2516 return (struct reg_window *) (fp + STACK_BIAS);
2517}
2518
2519void __noreturn die_if_kernel(char *str, struct pt_regs *regs)
2520{
2521 static int die_counter;
2522 int count = 0;
2523
2524 /* Amuse the user. */
2525 printk(
2526" \\|/ ____ \\|/\n"
2527" \"@'/ .. \\`@\"\n"
2528" /_| \\__/ |_\\\n"
2529" \\__U_/\n");
2530
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");
2534 show_regs(regs);
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);
2540
2541 /* Stop the back trace when we hit userland or we
2542 * find some badly aligned kernel stack.
2543 */
2544 while (rw &&
2545 count++ < 30 &&
2546 kstack_valid(tp, (unsigned long) rw)) {
2547 printk("Caller[%016lx]: %pS\n", rw->ins[7],
2548 (void *) rw->ins[7]);
2549
2550 rw = kernel_stack_up(rw);
2551 }
2552 instruction_dump ((unsigned int *) regs->tpc);
2553 } else {
2554 if (test_thread_flag(TIF_32BIT)) {
2555 regs->tpc &= 0xffffffff;
2556 regs->tnpc &= 0xffffffff;
2557 }
2558 user_instruction_dump ((unsigned int __user *) regs->tpc);
2559 }
2560 if (panic_on_oops)
2561 panic("Fatal exception");
2562 make_task_dead((regs->tstate & TSTATE_PRIV)? SIGKILL : SIGSEGV);
2563}
2564EXPORT_SYMBOL(die_if_kernel);
2565
2566#define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2567#define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2568
2569void do_illegal_instruction(struct pt_regs *regs)
2570{
2571 enum ctx_state prev_state = exception_enter();
2572 unsigned long pc = regs->tpc;
2573 unsigned long tstate = regs->tstate;
2574 u32 insn;
2575
2576 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2577 0, 0x10, SIGILL) == NOTIFY_STOP)
2578 goto out;
2579
2580 if (tstate & TSTATE_PRIV)
2581 die_if_kernel("Kernel illegal instruction", regs);
2582 if (test_thread_flag(TIF_32BIT))
2583 pc = (u32)pc;
2584 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2585 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2586 if (handle_popc(insn, regs))
2587 goto out;
2588 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2589 if (handle_ldf_stq(insn, regs))
2590 goto out;
2591 } else if (tlb_type == hypervisor) {
2592 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2593 if (!vis_emul(regs, insn))
2594 goto out;
2595 } else {
2596 struct fpustate *f = FPUSTATE;
2597
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.
2602 */
2603 if (do_mathemu(regs, f, true))
2604 goto out;
2605 }
2606 }
2607 }
2608 force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc);
2609out:
2610 exception_exit(prev_state);
2611}
2612
2613void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2614{
2615 enum ctx_state prev_state = exception_enter();
2616
2617 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2618 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2619 goto out;
2620
2621 if (regs->tstate & TSTATE_PRIV) {
2622 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2623 goto out;
2624 }
2625 if (is_no_fault_exception(regs))
2626 return;
2627
2628 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)sfar);
2629out:
2630 exception_exit(prev_state);
2631}
2632
2633void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2634{
2635 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2636 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2637 return;
2638
2639 if (regs->tstate & TSTATE_PRIV) {
2640 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2641 return;
2642 }
2643 if (is_no_fault_exception(regs))
2644 return;
2645
2646 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) addr);
2647}
2648
2649/* sun4v_mem_corrupt_detect_precise() - Handle precise exception on an ADI
2650 * tag mismatch.
2651 *
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.
2655 */
2656void sun4v_mem_corrupt_detect_precise(struct pt_regs *regs, unsigned long addr,
2657 unsigned long context)
2658{
2659 if (notify_die(DIE_TRAP, "memory corruption precise exception", regs,
2660 0, 0x8, SIGSEGV) == NOTIFY_STOP)
2661 return;
2662
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
2667 * call.
2668 */
2669 const struct exception_table_entry *entry;
2670
2671 entry = search_exception_tables(regs->tpc);
2672 if (entry) {
2673 /* Looks like a bad syscall parameter */
2674#ifdef DEBUG_EXCEPTIONS
2675 pr_emerg("Exception: PC<%016lx> faddr<UNKNOWN>\n",
2676 regs->tpc);
2677 pr_emerg("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
2678 regs->tpc, entry->fixup);
2679#endif
2680 regs->tpc = entry->fixup;
2681 regs->tnpc = regs->tpc + 4;
2682 return;
2683 }
2684 pr_emerg("%s: ADDR[%016lx] CTX[%lx], going.\n",
2685 __func__, addr, context);
2686 die_if_kernel("MCD precise", regs);
2687 }
2688
2689 if (test_thread_flag(TIF_32BIT)) {
2690 regs->tpc &= 0xffffffff;
2691 regs->tnpc &= 0xffffffff;
2692 }
2693 force_sig_fault(SIGSEGV, SEGV_ADIPERR, (void __user *)addr);
2694}
2695
2696void do_privop(struct pt_regs *regs)
2697{
2698 enum ctx_state prev_state = exception_enter();
2699
2700 if (notify_die(DIE_TRAP, "privileged operation", regs,
2701 0, 0x11, SIGILL) == NOTIFY_STOP)
2702 goto out;
2703
2704 if (test_thread_flag(TIF_32BIT)) {
2705 regs->tpc &= 0xffffffff;
2706 regs->tnpc &= 0xffffffff;
2707 }
2708 force_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)regs->tpc);
2709out:
2710 exception_exit(prev_state);
2711}
2712
2713void do_privact(struct pt_regs *regs)
2714{
2715 do_privop(regs);
2716}
2717
2718/* Trap level 1 stuff or other traps we should never see... */
2719void do_cee(struct pt_regs *regs)
2720{
2721 exception_enter();
2722 die_if_kernel("TL0: Cache Error Exception", regs);
2723}
2724
2725void do_div0_tl1(struct pt_regs *regs)
2726{
2727 exception_enter();
2728 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2729 die_if_kernel("TL1: DIV0 Exception", regs);
2730}
2731
2732void do_fpieee_tl1(struct pt_regs *regs)
2733{
2734 exception_enter();
2735 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2736 die_if_kernel("TL1: FPU IEEE Exception", regs);
2737}
2738
2739void do_fpother_tl1(struct pt_regs *regs)
2740{
2741 exception_enter();
2742 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2743 die_if_kernel("TL1: FPU Other Exception", regs);
2744}
2745
2746void do_ill_tl1(struct pt_regs *regs)
2747{
2748 exception_enter();
2749 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2750 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2751}
2752
2753void do_irq_tl1(struct pt_regs *regs)
2754{
2755 exception_enter();
2756 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2757 die_if_kernel("TL1: IRQ Exception", regs);
2758}
2759
2760void do_lddfmna_tl1(struct pt_regs *regs)
2761{
2762 exception_enter();
2763 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2764 die_if_kernel("TL1: LDDF Exception", regs);
2765}
2766
2767void do_stdfmna_tl1(struct pt_regs *regs)
2768{
2769 exception_enter();
2770 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2771 die_if_kernel("TL1: STDF Exception", regs);
2772}
2773
2774void do_paw(struct pt_regs *regs)
2775{
2776 exception_enter();
2777 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2778}
2779
2780void do_paw_tl1(struct pt_regs *regs)
2781{
2782 exception_enter();
2783 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2784 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2785}
2786
2787void do_vaw(struct pt_regs *regs)
2788{
2789 exception_enter();
2790 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2791}
2792
2793void do_vaw_tl1(struct pt_regs *regs)
2794{
2795 exception_enter();
2796 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2797 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2798}
2799
2800void do_tof_tl1(struct pt_regs *regs)
2801{
2802 exception_enter();
2803 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2804 die_if_kernel("TL1: Tag Overflow Exception", regs);
2805}
2806
2807void do_getpsr(struct pt_regs *regs)
2808{
2809 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2810 regs->tpc = regs->tnpc;
2811 regs->tnpc += 4;
2812 if (test_thread_flag(TIF_32BIT)) {
2813 regs->tpc &= 0xffffffff;
2814 regs->tnpc &= 0xffffffff;
2815 }
2816}
2817
2818u64 cpu_mondo_counter[NR_CPUS] = {0};
2819struct trap_per_cpu trap_block[NR_CPUS];
2820EXPORT_SYMBOL(trap_block);
2821
2822/* This can get invoked before sched_init() so play it super safe
2823 * and use hard_smp_processor_id().
2824 */
2825void notrace init_cur_cpu_trap(struct thread_info *t)
2826{
2827 int cpu = hard_smp_processor_id();
2828 struct trap_per_cpu *p = &trap_block[cpu];
2829
2830 p->thread = t;
2831 p->pgd_paddr = 0;
2832}
2833
2834extern void thread_info_offsets_are_bolixed_dave(void);
2835extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2836extern void tsb_config_offsets_are_bolixed_dave(void);
2837
2838/* Only invoked on boot processor. */
2839void __init trap_init(void)
2840{
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,
2848 fault_address) ||
2849 TI_KREGS != offsetof(struct thread_info, kregs) ||
2850 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2851 TI_REG_WINDOW != offsetof(struct thread_info,
2852 reg_window) ||
2853 TI_RWIN_SPTRS != offsetof(struct thread_info,
2854 rwbuf_stkptrs) ||
2855 TI_GSR != offsetof(struct thread_info, gsr) ||
2856 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2857 TI_PRE_COUNT != offsetof(struct thread_info,
2858 preempt_count) ||
2859 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2860 TI_KUNA_REGS != offsetof(struct thread_info,
2861 kern_una_regs) ||
2862 TI_KUNA_INSN != offsetof(struct thread_info,
2863 kern_una_insn) ||
2864 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2865 (TI_FPREGS & (64 - 1)));
2866
2867 BUILD_BUG_ON(TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu,
2868 thread) ||
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)));
2905
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)));
2918
2919 /* Attach to the address space of init_task. On SMP we
2920 * do this in smp.c:smp_callin for other cpus.
2921 */
2922 mmgrab(&init_mm);
2923 current->active_mm = &init_mm;
2924}
1// SPDX-License-Identifier: GPL-2.0-only
2/* arch/sparc64/kernel/traps.c
3 *
4 * Copyright (C) 1995,1997,2008,2009,2012 David S. Miller (davem@davemloft.net)
5 * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com)
6 */
7
8/*
9 * I like traps on v9, :))))
10 */
11
12#include <linux/cpu.h>
13#include <linux/extable.h>
14#include <linux/sched/mm.h>
15#include <linux/sched/debug.h>
16#include <linux/linkage.h>
17#include <linux/kernel.h>
18#include <linux/signal.h>
19#include <linux/smp.h>
20#include <linux/mm.h>
21#include <linux/init.h>
22#include <linux/kallsyms.h>
23#include <linux/kdebug.h>
24#include <linux/ftrace.h>
25#include <linux/reboot.h>
26#include <linux/gfp.h>
27#include <linux/context_tracking.h>
28
29#include <asm/smp.h>
30#include <asm/delay.h>
31#include <asm/ptrace.h>
32#include <asm/oplib.h>
33#include <asm/page.h>
34#include <asm/unistd.h>
35#include <linux/uaccess.h>
36#include <asm/fpumacro.h>
37#include <asm/lsu.h>
38#include <asm/dcu.h>
39#include <asm/estate.h>
40#include <asm/chafsr.h>
41#include <asm/sfafsr.h>
42#include <asm/psrcompat.h>
43#include <asm/processor.h>
44#include <asm/timer.h>
45#include <asm/head.h>
46#include <asm/prom.h>
47#include <asm/memctrl.h>
48#include <asm/cacheflush.h>
49#include <asm/setup.h>
50
51#include "entry.h"
52#include "kernel.h"
53#include "kstack.h"
54
55/* When an irrecoverable trap occurs at tl > 0, the trap entry
56 * code logs the trap state registers at every level in the trap
57 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout
58 * is as follows:
59 */
60struct tl1_traplog {
61 struct {
62 unsigned long tstate;
63 unsigned long tpc;
64 unsigned long tnpc;
65 unsigned long tt;
66 } trapstack[4];
67 unsigned long tl;
68};
69
70static void dump_tl1_traplog(struct tl1_traplog *p)
71{
72 int i, limit;
73
74 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
75 "dumping track stack.\n", p->tl);
76
77 limit = (tlb_type == hypervisor) ? 2 : 4;
78 for (i = 0; i < limit; i++) {
79 printk(KERN_EMERG
80 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
81 "TNPC[%016lx] TT[%lx]\n",
82 i + 1,
83 p->trapstack[i].tstate, p->trapstack[i].tpc,
84 p->trapstack[i].tnpc, p->trapstack[i].tt);
85 printk("TRAPLOG: TPC<%pS>\n", (void *) p->trapstack[i].tpc);
86 }
87}
88
89void bad_trap(struct pt_regs *regs, long lvl)
90{
91 char buffer[36];
92
93 if (notify_die(DIE_TRAP, "bad trap", regs,
94 0, lvl, SIGTRAP) == NOTIFY_STOP)
95 return;
96
97 if (lvl < 0x100) {
98 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
99 die_if_kernel(buffer, regs);
100 }
101
102 lvl -= 0x100;
103 if (regs->tstate & TSTATE_PRIV) {
104 sprintf(buffer, "Kernel bad sw trap %lx", lvl);
105 die_if_kernel(buffer, regs);
106 }
107 if (test_thread_flag(TIF_32BIT)) {
108 regs->tpc &= 0xffffffff;
109 regs->tnpc &= 0xffffffff;
110 }
111 force_sig_fault_trapno(SIGILL, ILL_ILLTRP,
112 (void __user *)regs->tpc, lvl);
113}
114
115void bad_trap_tl1(struct pt_regs *regs, long lvl)
116{
117 char buffer[36];
118
119 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
120 0, lvl, SIGTRAP) == NOTIFY_STOP)
121 return;
122
123 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
124
125 sprintf (buffer, "Bad trap %lx at tl>0", lvl);
126 die_if_kernel (buffer, regs);
127}
128
129#ifdef CONFIG_DEBUG_BUGVERBOSE
130void do_BUG(const char *file, int line)
131{
132 bust_spinlocks(1);
133 printk("kernel BUG at %s:%d!\n", file, line);
134}
135EXPORT_SYMBOL(do_BUG);
136#endif
137
138static DEFINE_SPINLOCK(dimm_handler_lock);
139static dimm_printer_t dimm_handler;
140
141static int sprintf_dimm(int synd_code, unsigned long paddr, char *buf, int buflen)
142{
143 unsigned long flags;
144 int ret = -ENODEV;
145
146 spin_lock_irqsave(&dimm_handler_lock, flags);
147 if (dimm_handler) {
148 ret = dimm_handler(synd_code, paddr, buf, buflen);
149 } else if (tlb_type == spitfire) {
150 if (prom_getunumber(synd_code, paddr, buf, buflen) == -1)
151 ret = -EINVAL;
152 else
153 ret = 0;
154 } else
155 ret = -ENODEV;
156 spin_unlock_irqrestore(&dimm_handler_lock, flags);
157
158 return ret;
159}
160
161int register_dimm_printer(dimm_printer_t func)
162{
163 unsigned long flags;
164 int ret = 0;
165
166 spin_lock_irqsave(&dimm_handler_lock, flags);
167 if (!dimm_handler)
168 dimm_handler = func;
169 else
170 ret = -EEXIST;
171 spin_unlock_irqrestore(&dimm_handler_lock, flags);
172
173 return ret;
174}
175EXPORT_SYMBOL_GPL(register_dimm_printer);
176
177void unregister_dimm_printer(dimm_printer_t func)
178{
179 unsigned long flags;
180
181 spin_lock_irqsave(&dimm_handler_lock, flags);
182 if (dimm_handler == func)
183 dimm_handler = NULL;
184 spin_unlock_irqrestore(&dimm_handler_lock, flags);
185}
186EXPORT_SYMBOL_GPL(unregister_dimm_printer);
187
188void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
189{
190 enum ctx_state prev_state = exception_enter();
191
192 if (notify_die(DIE_TRAP, "instruction access exception", regs,
193 0, 0x8, SIGTRAP) == NOTIFY_STOP)
194 goto out;
195
196 if (regs->tstate & TSTATE_PRIV) {
197 printk("spitfire_insn_access_exception: SFSR[%016lx] "
198 "SFAR[%016lx], going.\n", sfsr, sfar);
199 die_if_kernel("Iax", regs);
200 }
201 if (test_thread_flag(TIF_32BIT)) {
202 regs->tpc &= 0xffffffff;
203 regs->tnpc &= 0xffffffff;
204 }
205 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)regs->tpc);
206out:
207 exception_exit(prev_state);
208}
209
210void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
211{
212 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
213 0, 0x8, SIGTRAP) == NOTIFY_STOP)
214 return;
215
216 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
217 spitfire_insn_access_exception(regs, sfsr, sfar);
218}
219
220void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
221{
222 unsigned short type = (type_ctx >> 16);
223 unsigned short ctx = (type_ctx & 0xffff);
224
225 if (notify_die(DIE_TRAP, "instruction access exception", regs,
226 0, 0x8, SIGTRAP) == NOTIFY_STOP)
227 return;
228
229 if (regs->tstate & TSTATE_PRIV) {
230 printk("sun4v_insn_access_exception: ADDR[%016lx] "
231 "CTX[%04x] TYPE[%04x], going.\n",
232 addr, ctx, type);
233 die_if_kernel("Iax", regs);
234 }
235
236 if (test_thread_flag(TIF_32BIT)) {
237 regs->tpc &= 0xffffffff;
238 regs->tnpc &= 0xffffffff;
239 }
240 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *) addr);
241}
242
243void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
244{
245 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs,
246 0, 0x8, SIGTRAP) == NOTIFY_STOP)
247 return;
248
249 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
250 sun4v_insn_access_exception(regs, addr, type_ctx);
251}
252
253static bool is_no_fault_exception(struct pt_regs *regs)
254{
255 unsigned char asi;
256 u32 insn;
257
258 if (get_user(insn, (u32 __user *)regs->tpc) == -EFAULT)
259 return false;
260
261 /*
262 * Must do a little instruction decoding here in order to
263 * decide on a course of action. The bits of interest are:
264 * insn[31:30] = op, where 3 indicates the load/store group
265 * insn[24:19] = op3, which identifies individual opcodes
266 * insn[13] indicates an immediate offset
267 * op3[4]=1 identifies alternate space instructions
268 * op3[5:4]=3 identifies floating point instructions
269 * op3[2]=1 identifies stores
270 * See "Opcode Maps" in the appendix of any Sparc V9
271 * architecture spec for full details.
272 */
273 if ((insn & 0xc0800000) == 0xc0800000) { /* op=3, op3[4]=1 */
274 if (insn & 0x2000) /* immediate offset */
275 asi = (regs->tstate >> 24); /* saved %asi */
276 else
277 asi = (insn >> 5); /* immediate asi */
278 if ((asi & 0xf6) == ASI_PNF) {
279 if (insn & 0x200000) /* op3[2], stores */
280 return false;
281 if (insn & 0x1000000) /* op3[5:4]=3 (fp) */
282 handle_ldf_stq(insn, regs);
283 else
284 handle_ld_nf(insn, regs);
285 return true;
286 }
287 }
288 return false;
289}
290
291void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
292{
293 enum ctx_state prev_state = exception_enter();
294
295 if (notify_die(DIE_TRAP, "data access exception", regs,
296 0, 0x30, SIGTRAP) == NOTIFY_STOP)
297 goto out;
298
299 if (regs->tstate & TSTATE_PRIV) {
300 /* Test if this comes from uaccess places. */
301 const struct exception_table_entry *entry;
302
303 entry = search_exception_tables(regs->tpc);
304 if (entry) {
305 /* Ouch, somebody is trying VM hole tricks on us... */
306#ifdef DEBUG_EXCEPTIONS
307 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
308 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
309 regs->tpc, entry->fixup);
310#endif
311 regs->tpc = entry->fixup;
312 regs->tnpc = regs->tpc + 4;
313 goto out;
314 }
315 /* Shit... */
316 printk("spitfire_data_access_exception: SFSR[%016lx] "
317 "SFAR[%016lx], going.\n", sfsr, sfar);
318 die_if_kernel("Dax", regs);
319 }
320
321 if (is_no_fault_exception(regs))
322 return;
323
324 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)sfar);
325out:
326 exception_exit(prev_state);
327}
328
329void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
330{
331 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
332 0, 0x30, SIGTRAP) == NOTIFY_STOP)
333 return;
334
335 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
336 spitfire_data_access_exception(regs, sfsr, sfar);
337}
338
339void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
340{
341 unsigned short type = (type_ctx >> 16);
342 unsigned short ctx = (type_ctx & 0xffff);
343
344 if (notify_die(DIE_TRAP, "data access exception", regs,
345 0, 0x8, SIGTRAP) == NOTIFY_STOP)
346 return;
347
348 if (regs->tstate & TSTATE_PRIV) {
349 /* Test if this comes from uaccess places. */
350 const struct exception_table_entry *entry;
351
352 entry = search_exception_tables(regs->tpc);
353 if (entry) {
354 /* Ouch, somebody is trying VM hole tricks on us... */
355#ifdef DEBUG_EXCEPTIONS
356 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
357 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
358 regs->tpc, entry->fixup);
359#endif
360 regs->tpc = entry->fixup;
361 regs->tnpc = regs->tpc + 4;
362 return;
363 }
364 printk("sun4v_data_access_exception: ADDR[%016lx] "
365 "CTX[%04x] TYPE[%04x], going.\n",
366 addr, ctx, type);
367 die_if_kernel("Dax", regs);
368 }
369
370 if (test_thread_flag(TIF_32BIT)) {
371 regs->tpc &= 0xffffffff;
372 regs->tnpc &= 0xffffffff;
373 }
374 if (is_no_fault_exception(regs))
375 return;
376
377 /* MCD (Memory Corruption Detection) disabled trap (TT=0x19) in HV
378 * is vectored thorugh data access exception trap with fault type
379 * set to HV_FAULT_TYPE_MCD_DIS. Check for MCD disabled trap.
380 * Accessing an address with invalid ASI for the address, for
381 * example setting an ADI tag on an address with ASI_MCD_PRIMARY
382 * when TTE.mcd is not set for the VA, is also vectored into
383 * kerbel by HV as data access exception with fault type set to
384 * HV_FAULT_TYPE_INV_ASI.
385 */
386 switch (type) {
387 case HV_FAULT_TYPE_INV_ASI:
388 force_sig_fault(SIGILL, ILL_ILLADR, (void __user *)addr);
389 break;
390 case HV_FAULT_TYPE_MCD_DIS:
391 force_sig_fault(SIGSEGV, SEGV_ACCADI, (void __user *)addr);
392 break;
393 default:
394 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)addr);
395 break;
396 }
397}
398
399void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
400{
401 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
402 0, 0x8, SIGTRAP) == NOTIFY_STOP)
403 return;
404
405 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
406 sun4v_data_access_exception(regs, addr, type_ctx);
407}
408
409#ifdef CONFIG_PCI
410#include "pci_impl.h"
411#endif
412
413/* When access exceptions happen, we must do this. */
414static void spitfire_clean_and_reenable_l1_caches(void)
415{
416 unsigned long va;
417
418 if (tlb_type != spitfire)
419 BUG();
420
421 /* Clean 'em. */
422 for (va = 0; va < (PAGE_SIZE << 1); va += 32) {
423 spitfire_put_icache_tag(va, 0x0);
424 spitfire_put_dcache_tag(va, 0x0);
425 }
426
427 /* Re-enable in LSU. */
428 __asm__ __volatile__("flush %%g6\n\t"
429 "membar #Sync\n\t"
430 "stxa %0, [%%g0] %1\n\t"
431 "membar #Sync"
432 : /* no outputs */
433 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC |
434 LSU_CONTROL_IM | LSU_CONTROL_DM),
435 "i" (ASI_LSU_CONTROL)
436 : "memory");
437}
438
439static void spitfire_enable_estate_errors(void)
440{
441 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
442 "membar #Sync"
443 : /* no outputs */
444 : "r" (ESTATE_ERR_ALL),
445 "i" (ASI_ESTATE_ERROR_EN));
446}
447
448static char ecc_syndrome_table[] = {
449 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49,
450 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a,
451 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48,
452 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c,
453 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48,
454 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29,
455 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b,
456 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48,
457 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48,
458 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e,
459 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b,
460 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
461 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36,
462 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48,
463 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48,
464 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
465 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48,
466 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b,
467 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32,
468 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48,
469 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b,
470 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48,
471 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48,
472 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b,
473 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49,
474 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48,
475 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48,
476 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
477 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48,
478 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b,
479 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b,
480 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a
481};
482
483static char *syndrome_unknown = "<Unknown>";
484
485static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit)
486{
487 unsigned short scode;
488 char memmod_str[64], *p;
489
490 if (udbl & bit) {
491 scode = ecc_syndrome_table[udbl & 0xff];
492 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
493 p = syndrome_unknown;
494 else
495 p = memmod_str;
496 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] "
497 "Memory Module \"%s\"\n",
498 smp_processor_id(), scode, p);
499 }
500
501 if (udbh & bit) {
502 scode = ecc_syndrome_table[udbh & 0xff];
503 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0)
504 p = syndrome_unknown;
505 else
506 p = memmod_str;
507 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] "
508 "Memory Module \"%s\"\n",
509 smp_processor_id(), scode, p);
510 }
511
512}
513
514static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs)
515{
516
517 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error "
518 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n",
519 smp_processor_id(), afsr, afar, udbl, udbh, tl1);
520
521 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE);
522
523 /* We always log it, even if someone is listening for this
524 * trap.
525 */
526 notify_die(DIE_TRAP, "Correctable ECC Error", regs,
527 0, TRAP_TYPE_CEE, SIGTRAP);
528
529 /* The Correctable ECC Error trap does not disable I/D caches. So
530 * we only have to restore the ESTATE Error Enable register.
531 */
532 spitfire_enable_estate_errors();
533}
534
535static 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{
537 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] "
538 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n",
539 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1);
540
541 /* XXX add more human friendly logging of the error status
542 * XXX as is implemented for cheetah
543 */
544
545 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE);
546
547 /* We always log it, even if someone is listening for this
548 * trap.
549 */
550 notify_die(DIE_TRAP, "Uncorrectable Error", regs,
551 0, tt, SIGTRAP);
552
553 if (regs->tstate & TSTATE_PRIV) {
554 if (tl1)
555 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
556 die_if_kernel("UE", regs);
557 }
558
559 /* XXX need more intelligent processing here, such as is implemented
560 * XXX for cheetah errors, in fact if the E-cache still holds the
561 * XXX line with bad parity this will loop
562 */
563
564 spitfire_clean_and_reenable_l1_caches();
565 spitfire_enable_estate_errors();
566
567 if (test_thread_flag(TIF_32BIT)) {
568 regs->tpc &= 0xffffffff;
569 regs->tnpc &= 0xffffffff;
570 }
571 force_sig_fault(SIGBUS, BUS_OBJERR, (void *)0);
572}
573
574void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
575{
576 unsigned long afsr, tt, udbh, udbl;
577 int tl1;
578
579 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT;
580 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT;
581 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0;
582 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT;
583 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT;
584
585#ifdef CONFIG_PCI
586 if (tt == TRAP_TYPE_DAE &&
587 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
588 spitfire_clean_and_reenable_l1_caches();
589 spitfire_enable_estate_errors();
590
591 pci_poke_faulted = 1;
592 regs->tnpc = regs->tpc + 4;
593 return;
594 }
595#endif
596
597 if (afsr & SFAFSR_UE)
598 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs);
599
600 if (tt == TRAP_TYPE_CEE) {
601 /* Handle the case where we took a CEE trap, but ACK'd
602 * only the UE state in the UDB error registers.
603 */
604 if (afsr & SFAFSR_UE) {
605 if (udbh & UDBE_CE) {
606 __asm__ __volatile__(
607 "stxa %0, [%1] %2\n\t"
608 "membar #Sync"
609 : /* no outputs */
610 : "r" (udbh & UDBE_CE),
611 "r" (0x0), "i" (ASI_UDB_ERROR_W));
612 }
613 if (udbl & UDBE_CE) {
614 __asm__ __volatile__(
615 "stxa %0, [%1] %2\n\t"
616 "membar #Sync"
617 : /* no outputs */
618 : "r" (udbl & UDBE_CE),
619 "r" (0x18), "i" (ASI_UDB_ERROR_W));
620 }
621 }
622
623 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs);
624 }
625}
626
627int cheetah_pcache_forced_on;
628
629void cheetah_enable_pcache(void)
630{
631 unsigned long dcr;
632
633 printk("CHEETAH: Enabling P-Cache on cpu %d.\n",
634 smp_processor_id());
635
636 __asm__ __volatile__("ldxa [%%g0] %1, %0"
637 : "=r" (dcr)
638 : "i" (ASI_DCU_CONTROL_REG));
639 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL);
640 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
641 "membar #Sync"
642 : /* no outputs */
643 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG));
644}
645
646/* Cheetah error trap handling. */
647static unsigned long ecache_flush_physbase;
648static unsigned long ecache_flush_linesize;
649static unsigned long ecache_flush_size;
650
651/* This table is ordered in priority of errors and matches the
652 * AFAR overwrite policy as well.
653 */
654
655struct afsr_error_table {
656 unsigned long mask;
657 const char *name;
658};
659
660static const char CHAFSR_PERR_msg[] =
661 "System interface protocol error";
662static const char CHAFSR_IERR_msg[] =
663 "Internal processor error";
664static const char CHAFSR_ISAP_msg[] =
665 "System request parity error on incoming address";
666static const char CHAFSR_UCU_msg[] =
667 "Uncorrectable E-cache ECC error for ifetch/data";
668static const char CHAFSR_UCC_msg[] =
669 "SW Correctable E-cache ECC error for ifetch/data";
670static const char CHAFSR_UE_msg[] =
671 "Uncorrectable system bus data ECC error for read";
672static const char CHAFSR_EDU_msg[] =
673 "Uncorrectable E-cache ECC error for stmerge/blkld";
674static const char CHAFSR_EMU_msg[] =
675 "Uncorrectable system bus MTAG error";
676static const char CHAFSR_WDU_msg[] =
677 "Uncorrectable E-cache ECC error for writeback";
678static const char CHAFSR_CPU_msg[] =
679 "Uncorrectable ECC error for copyout";
680static const char CHAFSR_CE_msg[] =
681 "HW corrected system bus data ECC error for read";
682static const char CHAFSR_EDC_msg[] =
683 "HW corrected E-cache ECC error for stmerge/blkld";
684static const char CHAFSR_EMC_msg[] =
685 "HW corrected system bus MTAG ECC error";
686static const char CHAFSR_WDC_msg[] =
687 "HW corrected E-cache ECC error for writeback";
688static const char CHAFSR_CPC_msg[] =
689 "HW corrected ECC error for copyout";
690static const char CHAFSR_TO_msg[] =
691 "Unmapped error from system bus";
692static const char CHAFSR_BERR_msg[] =
693 "Bus error response from system bus";
694static const char CHAFSR_IVC_msg[] =
695 "HW corrected system bus data ECC error for ivec read";
696static const char CHAFSR_IVU_msg[] =
697 "Uncorrectable system bus data ECC error for ivec read";
698static struct afsr_error_table __cheetah_error_table[] = {
699 { CHAFSR_PERR, CHAFSR_PERR_msg },
700 { CHAFSR_IERR, CHAFSR_IERR_msg },
701 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
702 { CHAFSR_UCU, CHAFSR_UCU_msg },
703 { CHAFSR_UCC, CHAFSR_UCC_msg },
704 { CHAFSR_UE, CHAFSR_UE_msg },
705 { CHAFSR_EDU, CHAFSR_EDU_msg },
706 { CHAFSR_EMU, CHAFSR_EMU_msg },
707 { CHAFSR_WDU, CHAFSR_WDU_msg },
708 { CHAFSR_CPU, CHAFSR_CPU_msg },
709 { CHAFSR_CE, CHAFSR_CE_msg },
710 { CHAFSR_EDC, CHAFSR_EDC_msg },
711 { CHAFSR_EMC, CHAFSR_EMC_msg },
712 { CHAFSR_WDC, CHAFSR_WDC_msg },
713 { CHAFSR_CPC, CHAFSR_CPC_msg },
714 { CHAFSR_TO, CHAFSR_TO_msg },
715 { CHAFSR_BERR, CHAFSR_BERR_msg },
716 /* These two do not update the AFAR. */
717 { CHAFSR_IVC, CHAFSR_IVC_msg },
718 { CHAFSR_IVU, CHAFSR_IVU_msg },
719 { 0, NULL },
720};
721static const char CHPAFSR_DTO_msg[] =
722 "System bus unmapped error for prefetch/storequeue-read";
723static const char CHPAFSR_DBERR_msg[] =
724 "System bus error for prefetch/storequeue-read";
725static const char CHPAFSR_THCE_msg[] =
726 "Hardware corrected E-cache Tag ECC error";
727static const char CHPAFSR_TSCE_msg[] =
728 "SW handled correctable E-cache Tag ECC error";
729static const char CHPAFSR_TUE_msg[] =
730 "Uncorrectable E-cache Tag ECC error";
731static const char CHPAFSR_DUE_msg[] =
732 "System bus uncorrectable data ECC error due to prefetch/store-fill";
733static struct afsr_error_table __cheetah_plus_error_table[] = {
734 { CHAFSR_PERR, CHAFSR_PERR_msg },
735 { CHAFSR_IERR, CHAFSR_IERR_msg },
736 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
737 { CHAFSR_UCU, CHAFSR_UCU_msg },
738 { CHAFSR_UCC, CHAFSR_UCC_msg },
739 { CHAFSR_UE, CHAFSR_UE_msg },
740 { CHAFSR_EDU, CHAFSR_EDU_msg },
741 { CHAFSR_EMU, CHAFSR_EMU_msg },
742 { CHAFSR_WDU, CHAFSR_WDU_msg },
743 { CHAFSR_CPU, CHAFSR_CPU_msg },
744 { CHAFSR_CE, CHAFSR_CE_msg },
745 { CHAFSR_EDC, CHAFSR_EDC_msg },
746 { CHAFSR_EMC, CHAFSR_EMC_msg },
747 { CHAFSR_WDC, CHAFSR_WDC_msg },
748 { CHAFSR_CPC, CHAFSR_CPC_msg },
749 { CHAFSR_TO, CHAFSR_TO_msg },
750 { CHAFSR_BERR, CHAFSR_BERR_msg },
751 { CHPAFSR_DTO, CHPAFSR_DTO_msg },
752 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg },
753 { CHPAFSR_THCE, CHPAFSR_THCE_msg },
754 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg },
755 { CHPAFSR_TUE, CHPAFSR_TUE_msg },
756 { CHPAFSR_DUE, CHPAFSR_DUE_msg },
757 /* These two do not update the AFAR. */
758 { CHAFSR_IVC, CHAFSR_IVC_msg },
759 { CHAFSR_IVU, CHAFSR_IVU_msg },
760 { 0, NULL },
761};
762static const char JPAFSR_JETO_msg[] =
763 "System interface protocol error, hw timeout caused";
764static const char JPAFSR_SCE_msg[] =
765 "Parity error on system snoop results";
766static const char JPAFSR_JEIC_msg[] =
767 "System interface protocol error, illegal command detected";
768static const char JPAFSR_JEIT_msg[] =
769 "System interface protocol error, illegal ADTYPE detected";
770static const char JPAFSR_OM_msg[] =
771 "Out of range memory error has occurred";
772static const char JPAFSR_ETP_msg[] =
773 "Parity error on L2 cache tag SRAM";
774static const char JPAFSR_UMS_msg[] =
775 "Error due to unsupported store";
776static const char JPAFSR_RUE_msg[] =
777 "Uncorrectable ECC error from remote cache/memory";
778static const char JPAFSR_RCE_msg[] =
779 "Correctable ECC error from remote cache/memory";
780static const char JPAFSR_BP_msg[] =
781 "JBUS parity error on returned read data";
782static const char JPAFSR_WBP_msg[] =
783 "JBUS parity error on data for writeback or block store";
784static const char JPAFSR_FRC_msg[] =
785 "Foreign read to DRAM incurring correctable ECC error";
786static const char JPAFSR_FRU_msg[] =
787 "Foreign read to DRAM incurring uncorrectable ECC error";
788static struct afsr_error_table __jalapeno_error_table[] = {
789 { JPAFSR_JETO, JPAFSR_JETO_msg },
790 { JPAFSR_SCE, JPAFSR_SCE_msg },
791 { JPAFSR_JEIC, JPAFSR_JEIC_msg },
792 { JPAFSR_JEIT, JPAFSR_JEIT_msg },
793 { CHAFSR_PERR, CHAFSR_PERR_msg },
794 { CHAFSR_IERR, CHAFSR_IERR_msg },
795 { CHAFSR_ISAP, CHAFSR_ISAP_msg },
796 { CHAFSR_UCU, CHAFSR_UCU_msg },
797 { CHAFSR_UCC, CHAFSR_UCC_msg },
798 { CHAFSR_UE, CHAFSR_UE_msg },
799 { CHAFSR_EDU, CHAFSR_EDU_msg },
800 { JPAFSR_OM, JPAFSR_OM_msg },
801 { CHAFSR_WDU, CHAFSR_WDU_msg },
802 { CHAFSR_CPU, CHAFSR_CPU_msg },
803 { CHAFSR_CE, CHAFSR_CE_msg },
804 { CHAFSR_EDC, CHAFSR_EDC_msg },
805 { JPAFSR_ETP, JPAFSR_ETP_msg },
806 { CHAFSR_WDC, CHAFSR_WDC_msg },
807 { CHAFSR_CPC, CHAFSR_CPC_msg },
808 { CHAFSR_TO, CHAFSR_TO_msg },
809 { CHAFSR_BERR, CHAFSR_BERR_msg },
810 { JPAFSR_UMS, JPAFSR_UMS_msg },
811 { JPAFSR_RUE, JPAFSR_RUE_msg },
812 { JPAFSR_RCE, JPAFSR_RCE_msg },
813 { JPAFSR_BP, JPAFSR_BP_msg },
814 { JPAFSR_WBP, JPAFSR_WBP_msg },
815 { JPAFSR_FRC, JPAFSR_FRC_msg },
816 { JPAFSR_FRU, JPAFSR_FRU_msg },
817 /* These two do not update the AFAR. */
818 { CHAFSR_IVU, CHAFSR_IVU_msg },
819 { 0, NULL },
820};
821static struct afsr_error_table *cheetah_error_table;
822static unsigned long cheetah_afsr_errors;
823
824struct cheetah_err_info *cheetah_error_log;
825
826static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr)
827{
828 struct cheetah_err_info *p;
829 int cpu = smp_processor_id();
830
831 if (!cheetah_error_log)
832 return NULL;
833
834 p = cheetah_error_log + (cpu * 2);
835 if ((afsr & CHAFSR_TL1) != 0UL)
836 p++;
837
838 return p;
839}
840
841extern unsigned int tl0_icpe[], tl1_icpe[];
842extern unsigned int tl0_dcpe[], tl1_dcpe[];
843extern unsigned int tl0_fecc[], tl1_fecc[];
844extern unsigned int tl0_cee[], tl1_cee[];
845extern unsigned int tl0_iae[], tl1_iae[];
846extern unsigned int tl0_dae[], tl1_dae[];
847extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[];
848extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[];
849extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[];
850extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[];
851extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[];
852
853void __init cheetah_ecache_flush_init(void)
854{
855 unsigned long largest_size, smallest_linesize, order, ver;
856 int i, sz;
857
858 /* Scan all cpu device tree nodes, note two values:
859 * 1) largest E-cache size
860 * 2) smallest E-cache line size
861 */
862 largest_size = 0UL;
863 smallest_linesize = ~0UL;
864
865 for (i = 0; i < NR_CPUS; i++) {
866 unsigned long val;
867
868 val = cpu_data(i).ecache_size;
869 if (!val)
870 continue;
871
872 if (val > largest_size)
873 largest_size = val;
874
875 val = cpu_data(i).ecache_line_size;
876 if (val < smallest_linesize)
877 smallest_linesize = val;
878
879 }
880
881 if (largest_size == 0UL || smallest_linesize == ~0UL) {
882 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache "
883 "parameters.\n");
884 prom_halt();
885 }
886
887 ecache_flush_size = (2 * largest_size);
888 ecache_flush_linesize = smallest_linesize;
889
890 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
891
892 if (ecache_flush_physbase == ~0UL) {
893 prom_printf("cheetah_ecache_flush_init: Cannot find %ld byte "
894 "contiguous physical memory.\n",
895 ecache_flush_size);
896 prom_halt();
897 }
898
899 /* Now allocate error trap reporting scoreboard. */
900 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info));
901 for (order = 0; order < NR_PAGE_ORDERS; order++) {
902 if ((PAGE_SIZE << order) >= sz)
903 break;
904 }
905 cheetah_error_log = (struct cheetah_err_info *)
906 __get_free_pages(GFP_KERNEL, order);
907 if (!cheetah_error_log) {
908 prom_printf("cheetah_ecache_flush_init: Failed to allocate "
909 "error logging scoreboard (%d bytes).\n", sz);
910 prom_halt();
911 }
912 memset(cheetah_error_log, 0, PAGE_SIZE << order);
913
914 /* Mark all AFSRs as invalid so that the trap handler will
915 * log new new information there.
916 */
917 for (i = 0; i < 2 * NR_CPUS; i++)
918 cheetah_error_log[i].afsr = CHAFSR_INVALID;
919
920 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
921 if ((ver >> 32) == __JALAPENO_ID ||
922 (ver >> 32) == __SERRANO_ID) {
923 cheetah_error_table = &__jalapeno_error_table[0];
924 cheetah_afsr_errors = JPAFSR_ERRORS;
925 } else if ((ver >> 32) == 0x003e0015) {
926 cheetah_error_table = &__cheetah_plus_error_table[0];
927 cheetah_afsr_errors = CHPAFSR_ERRORS;
928 } else {
929 cheetah_error_table = &__cheetah_error_table[0];
930 cheetah_afsr_errors = CHAFSR_ERRORS;
931 }
932
933 /* Now patch trap tables. */
934 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4));
935 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4));
936 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4));
937 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4));
938 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4));
939 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4));
940 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4));
941 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4));
942 if (tlb_type == cheetah_plus) {
943 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4));
944 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4));
945 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4));
946 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4));
947 }
948 flushi(PAGE_OFFSET);
949}
950
951static void cheetah_flush_ecache(void)
952{
953 unsigned long flush_base = ecache_flush_physbase;
954 unsigned long flush_linesize = ecache_flush_linesize;
955 unsigned long flush_size = ecache_flush_size;
956
957 __asm__ __volatile__("1: subcc %0, %4, %0\n\t"
958 " bne,pt %%xcc, 1b\n\t"
959 " ldxa [%2 + %0] %3, %%g0\n\t"
960 : "=&r" (flush_size)
961 : "0" (flush_size), "r" (flush_base),
962 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize));
963}
964
965static void cheetah_flush_ecache_line(unsigned long physaddr)
966{
967 unsigned long alias;
968
969 physaddr &= ~(8UL - 1UL);
970 physaddr = (ecache_flush_physbase +
971 (physaddr & ((ecache_flush_size>>1UL) - 1UL)));
972 alias = physaddr + (ecache_flush_size >> 1UL);
973 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t"
974 "ldxa [%1] %2, %%g0\n\t"
975 "membar #Sync"
976 : /* no outputs */
977 : "r" (physaddr), "r" (alias),
978 "i" (ASI_PHYS_USE_EC));
979}
980
981/* Unfortunately, the diagnostic access to the I-cache tags we need to
982 * use to clear the thing interferes with I-cache coherency transactions.
983 *
984 * So we must only flush the I-cache when it is disabled.
985 */
986static void __cheetah_flush_icache(void)
987{
988 unsigned int icache_size, icache_line_size;
989 unsigned long addr;
990
991 icache_size = local_cpu_data().icache_size;
992 icache_line_size = local_cpu_data().icache_line_size;
993
994 /* Clear the valid bits in all the tags. */
995 for (addr = 0; addr < icache_size; addr += icache_line_size) {
996 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
997 "membar #Sync"
998 : /* no outputs */
999 : "r" (addr | (2 << 3)),
1000 "i" (ASI_IC_TAG));
1001 }
1002}
1003
1004static void cheetah_flush_icache(void)
1005{
1006 unsigned long dcu_save;
1007
1008 /* Save current DCU, disable I-cache. */
1009 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1010 "or %0, %2, %%g1\n\t"
1011 "stxa %%g1, [%%g0] %1\n\t"
1012 "membar #Sync"
1013 : "=r" (dcu_save)
1014 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC)
1015 : "g1");
1016
1017 __cheetah_flush_icache();
1018
1019 /* Restore DCU register */
1020 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1021 "membar #Sync"
1022 : /* no outputs */
1023 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG));
1024}
1025
1026static void cheetah_flush_dcache(void)
1027{
1028 unsigned int dcache_size, dcache_line_size;
1029 unsigned long addr;
1030
1031 dcache_size = local_cpu_data().dcache_size;
1032 dcache_line_size = local_cpu_data().dcache_line_size;
1033
1034 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1035 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
1036 "membar #Sync"
1037 : /* no outputs */
1038 : "r" (addr), "i" (ASI_DCACHE_TAG));
1039 }
1040}
1041
1042/* In order to make the even parity correct we must do two things.
1043 * First, we clear DC_data_parity and set DC_utag to an appropriate value.
1044 * Next, we clear out all 32-bytes of data for that line. Data of
1045 * all-zero + tag parity value of zero == correct parity.
1046 */
1047static void cheetah_plus_zap_dcache_parity(void)
1048{
1049 unsigned int dcache_size, dcache_line_size;
1050 unsigned long addr;
1051
1052 dcache_size = local_cpu_data().dcache_size;
1053 dcache_line_size = local_cpu_data().dcache_line_size;
1054
1055 for (addr = 0; addr < dcache_size; addr += dcache_line_size) {
1056 unsigned long tag = (addr >> 14);
1057 unsigned long line;
1058
1059 __asm__ __volatile__("membar #Sync\n\t"
1060 "stxa %0, [%1] %2\n\t"
1061 "membar #Sync"
1062 : /* no outputs */
1063 : "r" (tag), "r" (addr),
1064 "i" (ASI_DCACHE_UTAG));
1065 for (line = addr; line < addr + dcache_line_size; line += 8)
1066 __asm__ __volatile__("membar #Sync\n\t"
1067 "stxa %%g0, [%0] %1\n\t"
1068 "membar #Sync"
1069 : /* no outputs */
1070 : "r" (line),
1071 "i" (ASI_DCACHE_DATA));
1072 }
1073}
1074
1075/* Conversion tables used to frob Cheetah AFSR syndrome values into
1076 * something palatable to the memory controller driver get_unumber
1077 * routine.
1078 */
1079#define MT0 137
1080#define MT1 138
1081#define MT2 139
1082#define NONE 254
1083#define MTC0 140
1084#define MTC1 141
1085#define MTC2 142
1086#define MTC3 143
1087#define C0 128
1088#define C1 129
1089#define C2 130
1090#define C3 131
1091#define C4 132
1092#define C5 133
1093#define C6 134
1094#define C7 135
1095#define C8 136
1096#define M2 144
1097#define M3 145
1098#define M4 146
1099#define M 147
1100static unsigned char cheetah_ecc_syntab[] = {
1101/*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M,
1102/*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16,
1103/*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10,
1104/*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M,
1105/*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6,
1106/*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4,
1107/*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4,
1108/*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3,
1109/*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5,
1110/*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M,
1111/*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2,
1112/*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3,
1113/*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M,
1114/*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3,
1115/*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M,
1116/*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M,
1117/*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4,
1118/*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M,
1119/*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2,
1120/*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M,
1121/*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4,
1122/*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3,
1123/*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3,
1124/*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2,
1125/*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4,
1126/*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M,
1127/*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3,
1128/*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M,
1129/*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3,
1130/*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M,
1131/*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M,
1132/*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M
1133};
1134static unsigned char cheetah_mtag_syntab[] = {
1135 NONE, MTC0,
1136 MTC1, NONE,
1137 MTC2, NONE,
1138 NONE, MT0,
1139 MTC3, NONE,
1140 NONE, MT1,
1141 NONE, MT2,
1142 NONE, NONE
1143};
1144
1145/* Return the highest priority error conditon mentioned. */
1146static inline unsigned long cheetah_get_hipri(unsigned long afsr)
1147{
1148 unsigned long tmp = 0;
1149 int i;
1150
1151 for (i = 0; cheetah_error_table[i].mask; i++) {
1152 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL)
1153 return tmp;
1154 }
1155 return tmp;
1156}
1157
1158static const char *cheetah_get_string(unsigned long bit)
1159{
1160 int i;
1161
1162 for (i = 0; cheetah_error_table[i].mask; i++) {
1163 if ((bit & cheetah_error_table[i].mask) != 0UL)
1164 return cheetah_error_table[i].name;
1165 }
1166 return "???";
1167}
1168
1169static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info,
1170 unsigned long afsr, unsigned long afar, int recoverable)
1171{
1172 unsigned long hipri;
1173 char unum[256];
1174
1175 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n",
1176 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1177 afsr, afar,
1178 (afsr & CHAFSR_TL1) ? 1 : 0);
1179 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
1180 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1181 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
1182 printk("%s" "ERROR(%d): ",
1183 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
1184 printk("TPC<%pS>\n", (void *) regs->tpc);
1185 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n",
1186 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1187 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
1188 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT,
1189 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "",
1190 (afsr & CHAFSR_PRIV) ? ", Privileged" : "");
1191 hipri = cheetah_get_hipri(afsr);
1192 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n",
1193 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1194 hipri, cheetah_get_string(hipri));
1195
1196 /* Try to get unumber if relevant. */
1197#define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \
1198 CHAFSR_CPC | CHAFSR_CPU | \
1199 CHAFSR_UE | CHAFSR_CE | \
1200 CHAFSR_EDC | CHAFSR_EDU | \
1201 CHAFSR_UCC | CHAFSR_UCU | \
1202 CHAFSR_WDU | CHAFSR_WDC)
1203#define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU)
1204 if (afsr & ESYND_ERRORS) {
1205 int syndrome;
1206 int ret;
1207
1208 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT;
1209 syndrome = cheetah_ecc_syntab[syndrome];
1210 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1211 if (ret != -1)
1212 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n",
1213 (recoverable ? KERN_WARNING : KERN_CRIT),
1214 smp_processor_id(), unum);
1215 } else if (afsr & MSYND_ERRORS) {
1216 int syndrome;
1217 int ret;
1218
1219 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT;
1220 syndrome = cheetah_mtag_syntab[syndrome];
1221 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum));
1222 if (ret != -1)
1223 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n",
1224 (recoverable ? KERN_WARNING : KERN_CRIT),
1225 smp_processor_id(), unum);
1226 }
1227
1228 /* Now dump the cache snapshots. */
1229 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx]\n",
1230 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1231 (int) info->dcache_index,
1232 info->dcache_tag,
1233 info->dcache_utag,
1234 info->dcache_stag);
1235 printk("%s" "ERROR(%d): D-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1236 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1237 info->dcache_data[0],
1238 info->dcache_data[1],
1239 info->dcache_data[2],
1240 info->dcache_data[3]);
1241 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx] "
1242 "u[%016llx] l[%016llx]\n",
1243 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1244 (int) info->icache_index,
1245 info->icache_tag,
1246 info->icache_utag,
1247 info->icache_stag,
1248 info->icache_upper,
1249 info->icache_lower);
1250 printk("%s" "ERROR(%d): I-cache INSN0[%016llx] INSN1[%016llx] INSN2[%016llx] INSN3[%016llx]\n",
1251 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1252 info->icache_data[0],
1253 info->icache_data[1],
1254 info->icache_data[2],
1255 info->icache_data[3]);
1256 printk("%s" "ERROR(%d): I-cache INSN4[%016llx] INSN5[%016llx] INSN6[%016llx] INSN7[%016llx]\n",
1257 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1258 info->icache_data[4],
1259 info->icache_data[5],
1260 info->icache_data[6],
1261 info->icache_data[7]);
1262 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016llx]\n",
1263 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1264 (int) info->ecache_index, info->ecache_tag);
1265 printk("%s" "ERROR(%d): E-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n",
1266 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
1267 info->ecache_data[0],
1268 info->ecache_data[1],
1269 info->ecache_data[2],
1270 info->ecache_data[3]);
1271
1272 afsr = (afsr & ~hipri) & cheetah_afsr_errors;
1273 while (afsr != 0UL) {
1274 unsigned long bit = cheetah_get_hipri(afsr);
1275
1276 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n",
1277 (recoverable ? KERN_WARNING : KERN_CRIT),
1278 bit, cheetah_get_string(bit));
1279
1280 afsr &= ~bit;
1281 }
1282
1283 if (!recoverable)
1284 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n");
1285}
1286
1287static int cheetah_recheck_errors(struct cheetah_err_info *logp)
1288{
1289 unsigned long afsr, afar;
1290 int ret = 0;
1291
1292 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1293 : "=r" (afsr)
1294 : "i" (ASI_AFSR));
1295 if ((afsr & cheetah_afsr_errors) != 0) {
1296 if (logp != NULL) {
1297 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t"
1298 : "=r" (afar)
1299 : "i" (ASI_AFAR));
1300 logp->afsr = afsr;
1301 logp->afar = afar;
1302 }
1303 ret = 1;
1304 }
1305 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1306 "membar #Sync\n\t"
1307 : : "r" (afsr), "i" (ASI_AFSR));
1308
1309 return ret;
1310}
1311
1312void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1313{
1314 struct cheetah_err_info local_snapshot, *p;
1315 int recoverable;
1316
1317 /* Flush E-cache */
1318 cheetah_flush_ecache();
1319
1320 p = cheetah_get_error_log(afsr);
1321 if (!p) {
1322 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n",
1323 afsr, afar);
1324 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1325 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1326 prom_halt();
1327 }
1328
1329 /* Grab snapshot of logged error. */
1330 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1331
1332 /* If the current trap snapshot does not match what the
1333 * trap handler passed along into our args, big trouble.
1334 * In such a case, mark the local copy as invalid.
1335 *
1336 * Else, it matches and we mark the afsr in the non-local
1337 * copy as invalid so we may log new error traps there.
1338 */
1339 if (p->afsr != afsr || p->afar != afar)
1340 local_snapshot.afsr = CHAFSR_INVALID;
1341 else
1342 p->afsr = CHAFSR_INVALID;
1343
1344 cheetah_flush_icache();
1345 cheetah_flush_dcache();
1346
1347 /* Re-enable I-cache/D-cache */
1348 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1349 "or %%g1, %1, %%g1\n\t"
1350 "stxa %%g1, [%%g0] %0\n\t"
1351 "membar #Sync"
1352 : /* no outputs */
1353 : "i" (ASI_DCU_CONTROL_REG),
1354 "i" (DCU_DC | DCU_IC)
1355 : "g1");
1356
1357 /* Re-enable error reporting */
1358 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1359 "or %%g1, %1, %%g1\n\t"
1360 "stxa %%g1, [%%g0] %0\n\t"
1361 "membar #Sync"
1362 : /* no outputs */
1363 : "i" (ASI_ESTATE_ERROR_EN),
1364 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1365 : "g1");
1366
1367 /* Decide if we can continue after handling this trap and
1368 * logging the error.
1369 */
1370 recoverable = 1;
1371 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1372 recoverable = 0;
1373
1374 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1375 * error was logged while we had error reporting traps disabled.
1376 */
1377 if (cheetah_recheck_errors(&local_snapshot)) {
1378 unsigned long new_afsr = local_snapshot.afsr;
1379
1380 /* If we got a new asynchronous error, die... */
1381 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1382 CHAFSR_WDU | CHAFSR_CPU |
1383 CHAFSR_IVU | CHAFSR_UE |
1384 CHAFSR_BERR | CHAFSR_TO))
1385 recoverable = 0;
1386 }
1387
1388 /* Log errors. */
1389 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1390
1391 if (!recoverable)
1392 panic("Irrecoverable Fast-ECC error trap.\n");
1393
1394 /* Flush E-cache to kick the error trap handlers out. */
1395 cheetah_flush_ecache();
1396}
1397
1398/* Try to fix a correctable error by pushing the line out from
1399 * the E-cache. Recheck error reporting registers to see if the
1400 * problem is intermittent.
1401 */
1402static int cheetah_fix_ce(unsigned long physaddr)
1403{
1404 unsigned long orig_estate;
1405 unsigned long alias1, alias2;
1406 int ret;
1407
1408 /* Make sure correctable error traps are disabled. */
1409 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t"
1410 "andn %0, %1, %%g1\n\t"
1411 "stxa %%g1, [%%g0] %2\n\t"
1412 "membar #Sync"
1413 : "=&r" (orig_estate)
1414 : "i" (ESTATE_ERROR_CEEN),
1415 "i" (ASI_ESTATE_ERROR_EN)
1416 : "g1");
1417
1418 /* We calculate alias addresses that will force the
1419 * cache line in question out of the E-cache. Then
1420 * we bring it back in with an atomic instruction so
1421 * that we get it in some modified/exclusive state,
1422 * then we displace it again to try and get proper ECC
1423 * pushed back into the system.
1424 */
1425 physaddr &= ~(8UL - 1UL);
1426 alias1 = (ecache_flush_physbase +
1427 (physaddr & ((ecache_flush_size >> 1) - 1)));
1428 alias2 = alias1 + (ecache_flush_size >> 1);
1429 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t"
1430 "ldxa [%1] %3, %%g0\n\t"
1431 "casxa [%2] %3, %%g0, %%g0\n\t"
1432 "ldxa [%0] %3, %%g0\n\t"
1433 "ldxa [%1] %3, %%g0\n\t"
1434 "membar #Sync"
1435 : /* no outputs */
1436 : "r" (alias1), "r" (alias2),
1437 "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1438
1439 /* Did that trigger another error? */
1440 if (cheetah_recheck_errors(NULL)) {
1441 /* Try one more time. */
1442 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t"
1443 "membar #Sync"
1444 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC));
1445 if (cheetah_recheck_errors(NULL))
1446 ret = 2;
1447 else
1448 ret = 1;
1449 } else {
1450 /* No new error, intermittent problem. */
1451 ret = 0;
1452 }
1453
1454 /* Restore error enables. */
1455 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
1456 "membar #Sync"
1457 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN));
1458
1459 return ret;
1460}
1461
1462/* Return non-zero if PADDR is a valid physical memory address. */
1463static int cheetah_check_main_memory(unsigned long paddr)
1464{
1465 unsigned long vaddr = PAGE_OFFSET + paddr;
1466
1467 if (vaddr > (unsigned long) high_memory)
1468 return 0;
1469
1470 return kern_addr_valid(vaddr);
1471}
1472
1473void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1474{
1475 struct cheetah_err_info local_snapshot, *p;
1476 int recoverable, is_memory;
1477
1478 p = cheetah_get_error_log(afsr);
1479 if (!p) {
1480 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n",
1481 afsr, afar);
1482 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1483 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1484 prom_halt();
1485 }
1486
1487 /* Grab snapshot of logged error. */
1488 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1489
1490 /* If the current trap snapshot does not match what the
1491 * trap handler passed along into our args, big trouble.
1492 * In such a case, mark the local copy as invalid.
1493 *
1494 * Else, it matches and we mark the afsr in the non-local
1495 * copy as invalid so we may log new error traps there.
1496 */
1497 if (p->afsr != afsr || p->afar != afar)
1498 local_snapshot.afsr = CHAFSR_INVALID;
1499 else
1500 p->afsr = CHAFSR_INVALID;
1501
1502 is_memory = cheetah_check_main_memory(afar);
1503
1504 if (is_memory && (afsr & CHAFSR_CE) != 0UL) {
1505 /* XXX Might want to log the results of this operation
1506 * XXX somewhere... -DaveM
1507 */
1508 cheetah_fix_ce(afar);
1509 }
1510
1511 {
1512 int flush_all, flush_line;
1513
1514 flush_all = flush_line = 0;
1515 if ((afsr & CHAFSR_EDC) != 0UL) {
1516 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC)
1517 flush_line = 1;
1518 else
1519 flush_all = 1;
1520 } else if ((afsr & CHAFSR_CPC) != 0UL) {
1521 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC)
1522 flush_line = 1;
1523 else
1524 flush_all = 1;
1525 }
1526
1527 /* Trap handler only disabled I-cache, flush it. */
1528 cheetah_flush_icache();
1529
1530 /* Re-enable I-cache */
1531 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1532 "or %%g1, %1, %%g1\n\t"
1533 "stxa %%g1, [%%g0] %0\n\t"
1534 "membar #Sync"
1535 : /* no outputs */
1536 : "i" (ASI_DCU_CONTROL_REG),
1537 "i" (DCU_IC)
1538 : "g1");
1539
1540 if (flush_all)
1541 cheetah_flush_ecache();
1542 else if (flush_line)
1543 cheetah_flush_ecache_line(afar);
1544 }
1545
1546 /* Re-enable error reporting */
1547 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1548 "or %%g1, %1, %%g1\n\t"
1549 "stxa %%g1, [%%g0] %0\n\t"
1550 "membar #Sync"
1551 : /* no outputs */
1552 : "i" (ASI_ESTATE_ERROR_EN),
1553 "i" (ESTATE_ERROR_CEEN)
1554 : "g1");
1555
1556 /* Decide if we can continue after handling this trap and
1557 * logging the error.
1558 */
1559 recoverable = 1;
1560 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1561 recoverable = 0;
1562
1563 /* Re-check AFSR/AFAR */
1564 (void) cheetah_recheck_errors(&local_snapshot);
1565
1566 /* Log errors. */
1567 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1568
1569 if (!recoverable)
1570 panic("Irrecoverable Correctable-ECC error trap.\n");
1571}
1572
1573void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
1574{
1575 struct cheetah_err_info local_snapshot, *p;
1576 int recoverable, is_memory;
1577
1578#ifdef CONFIG_PCI
1579 /* Check for the special PCI poke sequence. */
1580 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) {
1581 cheetah_flush_icache();
1582 cheetah_flush_dcache();
1583
1584 /* Re-enable I-cache/D-cache */
1585 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1586 "or %%g1, %1, %%g1\n\t"
1587 "stxa %%g1, [%%g0] %0\n\t"
1588 "membar #Sync"
1589 : /* no outputs */
1590 : "i" (ASI_DCU_CONTROL_REG),
1591 "i" (DCU_DC | DCU_IC)
1592 : "g1");
1593
1594 /* Re-enable error reporting */
1595 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1596 "or %%g1, %1, %%g1\n\t"
1597 "stxa %%g1, [%%g0] %0\n\t"
1598 "membar #Sync"
1599 : /* no outputs */
1600 : "i" (ASI_ESTATE_ERROR_EN),
1601 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1602 : "g1");
1603
1604 (void) cheetah_recheck_errors(NULL);
1605
1606 pci_poke_faulted = 1;
1607 regs->tpc += 4;
1608 regs->tnpc = regs->tpc + 4;
1609 return;
1610 }
1611#endif
1612
1613 p = cheetah_get_error_log(afsr);
1614 if (!p) {
1615 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n",
1616 afsr, afar);
1617 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n",
1618 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate);
1619 prom_halt();
1620 }
1621
1622 /* Grab snapshot of logged error. */
1623 memcpy(&local_snapshot, p, sizeof(local_snapshot));
1624
1625 /* If the current trap snapshot does not match what the
1626 * trap handler passed along into our args, big trouble.
1627 * In such a case, mark the local copy as invalid.
1628 *
1629 * Else, it matches and we mark the afsr in the non-local
1630 * copy as invalid so we may log new error traps there.
1631 */
1632 if (p->afsr != afsr || p->afar != afar)
1633 local_snapshot.afsr = CHAFSR_INVALID;
1634 else
1635 p->afsr = CHAFSR_INVALID;
1636
1637 is_memory = cheetah_check_main_memory(afar);
1638
1639 {
1640 int flush_all, flush_line;
1641
1642 flush_all = flush_line = 0;
1643 if ((afsr & CHAFSR_EDU) != 0UL) {
1644 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU)
1645 flush_line = 1;
1646 else
1647 flush_all = 1;
1648 } else if ((afsr & CHAFSR_BERR) != 0UL) {
1649 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR)
1650 flush_line = 1;
1651 else
1652 flush_all = 1;
1653 }
1654
1655 cheetah_flush_icache();
1656 cheetah_flush_dcache();
1657
1658 /* Re-enable I/D caches */
1659 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1660 "or %%g1, %1, %%g1\n\t"
1661 "stxa %%g1, [%%g0] %0\n\t"
1662 "membar #Sync"
1663 : /* no outputs */
1664 : "i" (ASI_DCU_CONTROL_REG),
1665 "i" (DCU_IC | DCU_DC)
1666 : "g1");
1667
1668 if (flush_all)
1669 cheetah_flush_ecache();
1670 else if (flush_line)
1671 cheetah_flush_ecache_line(afar);
1672 }
1673
1674 /* Re-enable error reporting */
1675 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1676 "or %%g1, %1, %%g1\n\t"
1677 "stxa %%g1, [%%g0] %0\n\t"
1678 "membar #Sync"
1679 : /* no outputs */
1680 : "i" (ASI_ESTATE_ERROR_EN),
1681 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN)
1682 : "g1");
1683
1684 /* Decide if we can continue after handling this trap and
1685 * logging the error.
1686 */
1687 recoverable = 1;
1688 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP))
1689 recoverable = 0;
1690
1691 /* Re-check AFSR/AFAR. What we are looking for here is whether a new
1692 * error was logged while we had error reporting traps disabled.
1693 */
1694 if (cheetah_recheck_errors(&local_snapshot)) {
1695 unsigned long new_afsr = local_snapshot.afsr;
1696
1697 /* If we got a new asynchronous error, die... */
1698 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU |
1699 CHAFSR_WDU | CHAFSR_CPU |
1700 CHAFSR_IVU | CHAFSR_UE |
1701 CHAFSR_BERR | CHAFSR_TO))
1702 recoverable = 0;
1703 }
1704
1705 /* Log errors. */
1706 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable);
1707
1708 /* "Recoverable" here means we try to yank the page from ever
1709 * being newly used again. This depends upon a few things:
1710 * 1) Must be main memory, and AFAR must be valid.
1711 * 2) If we trapped from user, OK.
1712 * 3) Else, if we trapped from kernel we must find exception
1713 * table entry (ie. we have to have been accessing user
1714 * space).
1715 *
1716 * If AFAR is not in main memory, or we trapped from kernel
1717 * and cannot find an exception table entry, it is unacceptable
1718 * to try and continue.
1719 */
1720 if (recoverable && is_memory) {
1721 if ((regs->tstate & TSTATE_PRIV) == 0UL) {
1722 /* OK, usermode access. */
1723 recoverable = 1;
1724 } else {
1725 const struct exception_table_entry *entry;
1726
1727 entry = search_exception_tables(regs->tpc);
1728 if (entry) {
1729 /* OK, kernel access to userspace. */
1730 recoverable = 1;
1731
1732 } else {
1733 /* BAD, privileged state is corrupted. */
1734 recoverable = 0;
1735 }
1736
1737 if (recoverable) {
1738 if (pfn_valid(afar >> PAGE_SHIFT))
1739 get_page(pfn_to_page(afar >> PAGE_SHIFT));
1740 else
1741 recoverable = 0;
1742
1743 /* Only perform fixup if we still have a
1744 * recoverable condition.
1745 */
1746 if (recoverable) {
1747 regs->tpc = entry->fixup;
1748 regs->tnpc = regs->tpc + 4;
1749 }
1750 }
1751 }
1752 } else {
1753 recoverable = 0;
1754 }
1755
1756 if (!recoverable)
1757 panic("Irrecoverable deferred error trap.\n");
1758}
1759
1760/* Handle a D/I cache parity error trap. TYPE is encoded as:
1761 *
1762 * Bit0: 0=dcache,1=icache
1763 * Bit1: 0=recoverable,1=unrecoverable
1764 *
1765 * The hardware has disabled both the I-cache and D-cache in
1766 * the %dcr register.
1767 */
1768void cheetah_plus_parity_error(int type, struct pt_regs *regs)
1769{
1770 if (type & 0x1)
1771 __cheetah_flush_icache();
1772 else
1773 cheetah_plus_zap_dcache_parity();
1774 cheetah_flush_dcache();
1775
1776 /* Re-enable I-cache/D-cache */
1777 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t"
1778 "or %%g1, %1, %%g1\n\t"
1779 "stxa %%g1, [%%g0] %0\n\t"
1780 "membar #Sync"
1781 : /* no outputs */
1782 : "i" (ASI_DCU_CONTROL_REG),
1783 "i" (DCU_DC | DCU_IC)
1784 : "g1");
1785
1786 if (type & 0x2) {
1787 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1788 smp_processor_id(),
1789 (type & 0x1) ? 'I' : 'D',
1790 regs->tpc);
1791 printk(KERN_EMERG "TPC<%pS>\n", (void *) regs->tpc);
1792 panic("Irrecoverable Cheetah+ parity error.");
1793 }
1794
1795 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n",
1796 smp_processor_id(),
1797 (type & 0x1) ? 'I' : 'D',
1798 regs->tpc);
1799 printk(KERN_WARNING "TPC<%pS>\n", (void *) regs->tpc);
1800}
1801
1802struct sun4v_error_entry {
1803 /* Unique error handle */
1804/*0x00*/u64 err_handle;
1805
1806 /* %stick value at the time of the error */
1807/*0x08*/u64 err_stick;
1808
1809/*0x10*/u8 reserved_1[3];
1810
1811 /* Error type */
1812/*0x13*/u8 err_type;
1813#define SUN4V_ERR_TYPE_UNDEFINED 0
1814#define SUN4V_ERR_TYPE_UNCORRECTED_RES 1
1815#define SUN4V_ERR_TYPE_PRECISE_NONRES 2
1816#define SUN4V_ERR_TYPE_DEFERRED_NONRES 3
1817#define SUN4V_ERR_TYPE_SHUTDOWN_RQST 4
1818#define SUN4V_ERR_TYPE_DUMP_CORE 5
1819#define SUN4V_ERR_TYPE_SP_STATE_CHANGE 6
1820#define SUN4V_ERR_TYPE_NUM 7
1821
1822 /* Error attributes */
1823/*0x14*/u32 err_attrs;
1824#define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001
1825#define SUN4V_ERR_ATTRS_MEMORY 0x00000002
1826#define SUN4V_ERR_ATTRS_PIO 0x00000004
1827#define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008
1828#define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010
1829#define SUN4V_ERR_ATTRS_SHUTDOWN_RQST 0x00000020
1830#define SUN4V_ERR_ATTRS_ASR 0x00000040
1831#define SUN4V_ERR_ATTRS_ASI 0x00000080
1832#define SUN4V_ERR_ATTRS_PRIV_REG 0x00000100
1833#define SUN4V_ERR_ATTRS_SPSTATE_MSK 0x00000600
1834#define SUN4V_ERR_ATTRS_MCD 0x00000800
1835#define SUN4V_ERR_ATTRS_SPSTATE_SHFT 9
1836#define SUN4V_ERR_ATTRS_MODE_MSK 0x03000000
1837#define SUN4V_ERR_ATTRS_MODE_SHFT 24
1838#define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000
1839
1840#define SUN4V_ERR_SPSTATE_FAULTED 0
1841#define SUN4V_ERR_SPSTATE_AVAILABLE 1
1842#define SUN4V_ERR_SPSTATE_NOT_PRESENT 2
1843
1844#define SUN4V_ERR_MODE_USER 1
1845#define SUN4V_ERR_MODE_PRIV 2
1846
1847 /* Real address of the memory region or PIO transaction */
1848/*0x18*/u64 err_raddr;
1849
1850 /* Size of the operation triggering the error, in bytes */
1851/*0x20*/u32 err_size;
1852
1853 /* ID of the CPU */
1854/*0x24*/u16 err_cpu;
1855
1856 /* Grace periof for shutdown, in seconds */
1857/*0x26*/u16 err_secs;
1858
1859 /* Value of the %asi register */
1860/*0x28*/u8 err_asi;
1861
1862/*0x29*/u8 reserved_2;
1863
1864 /* Value of the ASR register number */
1865/*0x2a*/u16 err_asr;
1866#define SUN4V_ERR_ASR_VALID 0x8000
1867
1868/*0x2c*/u32 reserved_3;
1869/*0x30*/u64 reserved_4;
1870/*0x38*/u64 reserved_5;
1871};
1872
1873static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0);
1874static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0);
1875
1876static const char *sun4v_err_type_to_str(u8 type)
1877{
1878 static const char *types[SUN4V_ERR_TYPE_NUM] = {
1879 "undefined",
1880 "uncorrected resumable",
1881 "precise nonresumable",
1882 "deferred nonresumable",
1883 "shutdown request",
1884 "dump core",
1885 "SP state change",
1886 };
1887
1888 if (type < SUN4V_ERR_TYPE_NUM)
1889 return types[type];
1890
1891 return "unknown";
1892}
1893
1894static void sun4v_emit_err_attr_strings(u32 attrs)
1895{
1896 static const char *attr_names[] = {
1897 "processor",
1898 "memory",
1899 "PIO",
1900 "int-registers",
1901 "fpu-registers",
1902 "shutdown-request",
1903 "ASR",
1904 "ASI",
1905 "priv-reg",
1906 };
1907 static const char *sp_states[] = {
1908 "sp-faulted",
1909 "sp-available",
1910 "sp-not-present",
1911 "sp-state-reserved",
1912 };
1913 static const char *modes[] = {
1914 "mode-reserved0",
1915 "user",
1916 "priv",
1917 "mode-reserved1",
1918 };
1919 u32 sp_state, mode;
1920 int i;
1921
1922 for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
1923 if (attrs & (1U << i)) {
1924 const char *s = attr_names[i];
1925
1926 pr_cont("%s ", s);
1927 }
1928 }
1929
1930 sp_state = ((attrs & SUN4V_ERR_ATTRS_SPSTATE_MSK) >>
1931 SUN4V_ERR_ATTRS_SPSTATE_SHFT);
1932 pr_cont("%s ", sp_states[sp_state]);
1933
1934 mode = ((attrs & SUN4V_ERR_ATTRS_MODE_MSK) >>
1935 SUN4V_ERR_ATTRS_MODE_SHFT);
1936 pr_cont("%s ", modes[mode]);
1937
1938 if (attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL)
1939 pr_cont("res-queue-full ");
1940}
1941
1942/* When the report contains a real-address of "-1" it means that the
1943 * hardware did not provide the address. So we compute the effective
1944 * address of the load or store instruction at regs->tpc and report
1945 * that. Usually when this happens it's a PIO and in such a case we
1946 * are using physical addresses with bypass ASIs anyways, so what we
1947 * report here is exactly what we want.
1948 */
1949static void sun4v_report_real_raddr(const char *pfx, struct pt_regs *regs)
1950{
1951 unsigned int insn;
1952 u64 addr;
1953
1954 if (!(regs->tstate & TSTATE_PRIV))
1955 return;
1956
1957 insn = *(unsigned int *) regs->tpc;
1958
1959 addr = compute_effective_address(regs, insn, 0);
1960
1961 printk("%s: insn effective address [0x%016llx]\n",
1962 pfx, addr);
1963}
1964
1965static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent,
1966 int cpu, const char *pfx, atomic_t *ocnt)
1967{
1968 u64 *raw_ptr = (u64 *) ent;
1969 u32 attrs;
1970 int cnt;
1971
1972 printk("%s: Reporting on cpu %d\n", pfx, cpu);
1973 printk("%s: TPC [0x%016lx] <%pS>\n",
1974 pfx, regs->tpc, (void *) regs->tpc);
1975
1976 printk("%s: RAW [%016llx:%016llx:%016llx:%016llx\n",
1977 pfx, raw_ptr[0], raw_ptr[1], raw_ptr[2], raw_ptr[3]);
1978 printk("%s: %016llx:%016llx:%016llx:%016llx]\n",
1979 pfx, raw_ptr[4], raw_ptr[5], raw_ptr[6], raw_ptr[7]);
1980
1981 printk("%s: handle [0x%016llx] stick [0x%016llx]\n",
1982 pfx, ent->err_handle, ent->err_stick);
1983
1984 printk("%s: type [%s]\n", pfx, sun4v_err_type_to_str(ent->err_type));
1985
1986 attrs = ent->err_attrs;
1987 printk("%s: attrs [0x%08x] < ", pfx, attrs);
1988 sun4v_emit_err_attr_strings(attrs);
1989 pr_cont(">\n");
1990
1991 /* Various fields in the error report are only valid if
1992 * certain attribute bits are set.
1993 */
1994 if (attrs & (SUN4V_ERR_ATTRS_MEMORY |
1995 SUN4V_ERR_ATTRS_PIO |
1996 SUN4V_ERR_ATTRS_ASI)) {
1997 printk("%s: raddr [0x%016llx]\n", pfx, ent->err_raddr);
1998
1999 if (ent->err_raddr == ~(u64)0)
2000 sun4v_report_real_raddr(pfx, regs);
2001 }
2002
2003 if (attrs & (SUN4V_ERR_ATTRS_MEMORY | SUN4V_ERR_ATTRS_ASI))
2004 printk("%s: size [0x%x]\n", pfx, ent->err_size);
2005
2006 if (attrs & (SUN4V_ERR_ATTRS_PROCESSOR |
2007 SUN4V_ERR_ATTRS_INT_REGISTERS |
2008 SUN4V_ERR_ATTRS_FPU_REGISTERS |
2009 SUN4V_ERR_ATTRS_PRIV_REG))
2010 printk("%s: cpu[%u]\n", pfx, ent->err_cpu);
2011
2012 if (attrs & SUN4V_ERR_ATTRS_ASI)
2013 printk("%s: asi [0x%02x]\n", pfx, ent->err_asi);
2014
2015 if ((attrs & (SUN4V_ERR_ATTRS_INT_REGISTERS |
2016 SUN4V_ERR_ATTRS_FPU_REGISTERS |
2017 SUN4V_ERR_ATTRS_PRIV_REG)) &&
2018 (ent->err_asr & SUN4V_ERR_ASR_VALID) != 0)
2019 printk("%s: reg [0x%04x]\n",
2020 pfx, ent->err_asr & ~SUN4V_ERR_ASR_VALID);
2021
2022 show_regs(regs);
2023
2024 if ((cnt = atomic_read(ocnt)) != 0) {
2025 atomic_set(ocnt, 0);
2026 wmb();
2027 printk("%s: Queue overflowed %d times.\n",
2028 pfx, cnt);
2029 }
2030}
2031
2032/* Handle memory corruption detected error which is vectored in
2033 * through resumable error trap.
2034 */
2035static void do_mcd_err(struct pt_regs *regs, struct sun4v_error_entry ent)
2036{
2037 if (notify_die(DIE_TRAP, "MCD error", regs, 0, 0x34,
2038 SIGSEGV) == NOTIFY_STOP)
2039 return;
2040
2041 if (regs->tstate & TSTATE_PRIV) {
2042 /* MCD exception could happen because the task was
2043 * running a system call with MCD enabled and passed a
2044 * non-versioned pointer or pointer with bad version
2045 * tag to the system call. In such cases, hypervisor
2046 * places the address of offending instruction in the
2047 * resumable error report. This is a deferred error,
2048 * so the read/write that caused the trap was potentially
2049 * retired long time back and we may have no choice
2050 * but to send SIGSEGV to the process.
2051 */
2052 const struct exception_table_entry *entry;
2053
2054 entry = search_exception_tables(regs->tpc);
2055 if (entry) {
2056 /* Looks like a bad syscall parameter */
2057#ifdef DEBUG_EXCEPTIONS
2058 pr_emerg("Exception: PC<%016lx> faddr<UNKNOWN>\n",
2059 regs->tpc);
2060 pr_emerg("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
2061 ent.err_raddr, entry->fixup);
2062#endif
2063 regs->tpc = entry->fixup;
2064 regs->tnpc = regs->tpc + 4;
2065 return;
2066 }
2067 }
2068
2069 /* Send SIGSEGV to the userspace process with the right signal
2070 * code
2071 */
2072 force_sig_fault(SIGSEGV, SEGV_ADIDERR, (void __user *)ent.err_raddr);
2073}
2074
2075/* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
2076 * Log the event and clear the first word of the entry.
2077 */
2078void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
2079{
2080 enum ctx_state prev_state = exception_enter();
2081 struct sun4v_error_entry *ent, local_copy;
2082 struct trap_per_cpu *tb;
2083 unsigned long paddr;
2084 int cpu;
2085
2086 cpu = get_cpu();
2087
2088 tb = &trap_block[cpu];
2089 paddr = tb->resum_kernel_buf_pa + offset;
2090 ent = __va(paddr);
2091
2092 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
2093
2094 /* We have a local copy now, so release the entry. */
2095 ent->err_handle = 0;
2096 wmb();
2097
2098 put_cpu();
2099
2100 if (local_copy.err_type == SUN4V_ERR_TYPE_SHUTDOWN_RQST) {
2101 /* We should really take the seconds field of
2102 * the error report and use it for the shutdown
2103 * invocation, but for now do the same thing we
2104 * do for a DS shutdown request.
2105 */
2106 pr_info("Shutdown request, %u seconds...\n",
2107 local_copy.err_secs);
2108 orderly_poweroff(true);
2109 goto out;
2110 }
2111
2112 /* If this is a memory corruption detected error vectored in
2113 * by HV through resumable error trap, call the handler
2114 */
2115 if (local_copy.err_attrs & SUN4V_ERR_ATTRS_MCD) {
2116 do_mcd_err(regs, local_copy);
2117 return;
2118 }
2119
2120 sun4v_log_error(regs, &local_copy, cpu,
2121 KERN_ERR "RESUMABLE ERROR",
2122 &sun4v_resum_oflow_cnt);
2123out:
2124 exception_exit(prev_state);
2125}
2126
2127/* If we try to printk() we'll probably make matters worse, by trying
2128 * to retake locks this cpu already holds or causing more errors. So
2129 * just bump a counter, and we'll report these counter bumps above.
2130 */
2131void sun4v_resum_overflow(struct pt_regs *regs)
2132{
2133 atomic_inc(&sun4v_resum_oflow_cnt);
2134}
2135
2136/* Given a set of registers, get the virtual addressi that was being accessed
2137 * by the faulting instructions at tpc.
2138 */
2139static unsigned long sun4v_get_vaddr(struct pt_regs *regs)
2140{
2141 unsigned int insn;
2142
2143 if (!copy_from_user(&insn, (void __user *)regs->tpc, 4)) {
2144 return compute_effective_address(regs, insn,
2145 (insn >> 25) & 0x1f);
2146 }
2147 return 0;
2148}
2149
2150/* Attempt to handle non-resumable errors generated from userspace.
2151 * Returns true if the signal was handled, false otherwise.
2152 */
2153static bool sun4v_nonresum_error_user_handled(struct pt_regs *regs,
2154 struct sun4v_error_entry *ent)
2155{
2156 unsigned int attrs = ent->err_attrs;
2157
2158 if (attrs & SUN4V_ERR_ATTRS_MEMORY) {
2159 unsigned long addr = ent->err_raddr;
2160
2161 if (addr == ~(u64)0) {
2162 /* This seems highly unlikely to ever occur */
2163 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Memory error detected in unknown location!\n");
2164 } else {
2165 unsigned long page_cnt = DIV_ROUND_UP(ent->err_size,
2166 PAGE_SIZE);
2167
2168 /* Break the unfortunate news. */
2169 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Memory failed at %016lX\n",
2170 addr);
2171 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Claiming %lu ages.\n",
2172 page_cnt);
2173
2174 while (page_cnt-- > 0) {
2175 if (pfn_valid(addr >> PAGE_SHIFT))
2176 get_page(pfn_to_page(addr >> PAGE_SHIFT));
2177 addr += PAGE_SIZE;
2178 }
2179 }
2180 force_sig(SIGKILL);
2181
2182 return true;
2183 }
2184 if (attrs & SUN4V_ERR_ATTRS_PIO) {
2185 force_sig_fault(SIGBUS, BUS_ADRERR,
2186 (void __user *)sun4v_get_vaddr(regs));
2187 return true;
2188 }
2189
2190 /* Default to doing nothing */
2191 return false;
2192}
2193
2194/* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
2195 * Log the event, clear the first word of the entry, and die.
2196 */
2197void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
2198{
2199 struct sun4v_error_entry *ent, local_copy;
2200 struct trap_per_cpu *tb;
2201 unsigned long paddr;
2202 int cpu;
2203
2204 cpu = get_cpu();
2205
2206 tb = &trap_block[cpu];
2207 paddr = tb->nonresum_kernel_buf_pa + offset;
2208 ent = __va(paddr);
2209
2210 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry));
2211
2212 /* We have a local copy now, so release the entry. */
2213 ent->err_handle = 0;
2214 wmb();
2215
2216 put_cpu();
2217
2218 if (!(regs->tstate & TSTATE_PRIV) &&
2219 sun4v_nonresum_error_user_handled(regs, &local_copy)) {
2220 /* DON'T PANIC: This userspace error was handled. */
2221 return;
2222 }
2223
2224#ifdef CONFIG_PCI
2225 /* Check for the special PCI poke sequence. */
2226 if (pci_poke_in_progress && pci_poke_cpu == cpu) {
2227 pci_poke_faulted = 1;
2228 regs->tpc += 4;
2229 regs->tnpc = regs->tpc + 4;
2230 return;
2231 }
2232#endif
2233
2234 sun4v_log_error(regs, &local_copy, cpu,
2235 KERN_EMERG "NON-RESUMABLE ERROR",
2236 &sun4v_nonresum_oflow_cnt);
2237
2238 panic("Non-resumable error.");
2239}
2240
2241/* If we try to printk() we'll probably make matters worse, by trying
2242 * to retake locks this cpu already holds or causing more errors. So
2243 * just bump a counter, and we'll report these counter bumps above.
2244 */
2245void sun4v_nonresum_overflow(struct pt_regs *regs)
2246{
2247 /* XXX Actually even this can make not that much sense. Perhaps
2248 * XXX we should just pull the plug and panic directly from here?
2249 */
2250 atomic_inc(&sun4v_nonresum_oflow_cnt);
2251}
2252
2253static void sun4v_tlb_error(struct pt_regs *regs)
2254{
2255 die_if_kernel("TLB/TSB error", regs);
2256}
2257
2258unsigned long sun4v_err_itlb_vaddr;
2259unsigned long sun4v_err_itlb_ctx;
2260unsigned long sun4v_err_itlb_pte;
2261unsigned long sun4v_err_itlb_error;
2262
2263void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
2264{
2265 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2266
2267 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
2268 regs->tpc, tl);
2269 printk(KERN_EMERG "SUN4V-ITLB: TPC<%pS>\n", (void *) regs->tpc);
2270 printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
2271 printk(KERN_EMERG "SUN4V-ITLB: O7<%pS>\n",
2272 (void *) regs->u_regs[UREG_I7]);
2273 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
2274 "pte[%lx] error[%lx]\n",
2275 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
2276 sun4v_err_itlb_pte, sun4v_err_itlb_error);
2277
2278 sun4v_tlb_error(regs);
2279}
2280
2281unsigned long sun4v_err_dtlb_vaddr;
2282unsigned long sun4v_err_dtlb_ctx;
2283unsigned long sun4v_err_dtlb_pte;
2284unsigned long sun4v_err_dtlb_error;
2285
2286void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
2287{
2288 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2289
2290 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
2291 regs->tpc, tl);
2292 printk(KERN_EMERG "SUN4V-DTLB: TPC<%pS>\n", (void *) regs->tpc);
2293 printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]);
2294 printk(KERN_EMERG "SUN4V-DTLB: O7<%pS>\n",
2295 (void *) regs->u_regs[UREG_I7]);
2296 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
2297 "pte[%lx] error[%lx]\n",
2298 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
2299 sun4v_err_dtlb_pte, sun4v_err_dtlb_error);
2300
2301 sun4v_tlb_error(regs);
2302}
2303
2304void hypervisor_tlbop_error(unsigned long err, unsigned long op)
2305{
2306 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n",
2307 err, op);
2308}
2309
2310void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
2311{
2312 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n",
2313 err, op);
2314}
2315
2316static void do_fpe_common(struct pt_regs *regs)
2317{
2318 if (regs->tstate & TSTATE_PRIV) {
2319 regs->tpc = regs->tnpc;
2320 regs->tnpc += 4;
2321 } else {
2322 unsigned long fsr = current_thread_info()->xfsr[0];
2323 int code;
2324
2325 if (test_thread_flag(TIF_32BIT)) {
2326 regs->tpc &= 0xffffffff;
2327 regs->tnpc &= 0xffffffff;
2328 }
2329 code = FPE_FLTUNK;
2330 if ((fsr & 0x1c000) == (1 << 14)) {
2331 if (fsr & 0x10)
2332 code = FPE_FLTINV;
2333 else if (fsr & 0x08)
2334 code = FPE_FLTOVF;
2335 else if (fsr & 0x04)
2336 code = FPE_FLTUND;
2337 else if (fsr & 0x02)
2338 code = FPE_FLTDIV;
2339 else if (fsr & 0x01)
2340 code = FPE_FLTRES;
2341 }
2342 force_sig_fault(SIGFPE, code, (void __user *)regs->tpc);
2343 }
2344}
2345
2346void do_fpieee(struct pt_regs *regs)
2347{
2348 enum ctx_state prev_state = exception_enter();
2349
2350 if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
2351 0, 0x24, SIGFPE) == NOTIFY_STOP)
2352 goto out;
2353
2354 do_fpe_common(regs);
2355out:
2356 exception_exit(prev_state);
2357}
2358
2359void do_fpother(struct pt_regs *regs)
2360{
2361 enum ctx_state prev_state = exception_enter();
2362 struct fpustate *f = FPUSTATE;
2363 int ret = 0;
2364
2365 if (notify_die(DIE_TRAP, "fpu exception other", regs,
2366 0, 0x25, SIGFPE) == NOTIFY_STOP)
2367 goto out;
2368
2369 switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
2370 case (2 << 14): /* unfinished_FPop */
2371 case (3 << 14): /* unimplemented_FPop */
2372 ret = do_mathemu(regs, f, false);
2373 break;
2374 }
2375 if (ret)
2376 goto out;
2377 do_fpe_common(regs);
2378out:
2379 exception_exit(prev_state);
2380}
2381
2382void do_tof(struct pt_regs *regs)
2383{
2384 enum ctx_state prev_state = exception_enter();
2385
2386 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
2387 0, 0x26, SIGEMT) == NOTIFY_STOP)
2388 goto out;
2389
2390 if (regs->tstate & TSTATE_PRIV)
2391 die_if_kernel("Penguin overflow trap from kernel mode", regs);
2392 if (test_thread_flag(TIF_32BIT)) {
2393 regs->tpc &= 0xffffffff;
2394 regs->tnpc &= 0xffffffff;
2395 }
2396 force_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)regs->tpc);
2397out:
2398 exception_exit(prev_state);
2399}
2400
2401void do_div0(struct pt_regs *regs)
2402{
2403 enum ctx_state prev_state = exception_enter();
2404
2405 if (notify_die(DIE_TRAP, "integer division by zero", regs,
2406 0, 0x28, SIGFPE) == NOTIFY_STOP)
2407 goto out;
2408
2409 if (regs->tstate & TSTATE_PRIV)
2410 die_if_kernel("TL0: Kernel divide by zero.", regs);
2411 if (test_thread_flag(TIF_32BIT)) {
2412 regs->tpc &= 0xffffffff;
2413 regs->tnpc &= 0xffffffff;
2414 }
2415 force_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)regs->tpc);
2416out:
2417 exception_exit(prev_state);
2418}
2419
2420static void instruction_dump(unsigned int *pc)
2421{
2422 int i;
2423
2424 if ((((unsigned long) pc) & 3))
2425 return;
2426
2427 printk("Instruction DUMP:");
2428 for (i = -3; i < 6; i++)
2429 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>');
2430 printk("\n");
2431}
2432
2433static void user_instruction_dump(unsigned int __user *pc)
2434{
2435 int i;
2436 unsigned int buf[9];
2437
2438 if ((((unsigned long) pc) & 3))
2439 return;
2440
2441 if (copy_from_user(buf, pc - 3, sizeof(buf)))
2442 return;
2443
2444 printk("Instruction DUMP:");
2445 for (i = 0; i < 9; i++)
2446 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>');
2447 printk("\n");
2448}
2449
2450void show_stack(struct task_struct *tsk, unsigned long *_ksp, const char *loglvl)
2451{
2452 unsigned long fp, ksp;
2453 struct thread_info *tp;
2454 int count = 0;
2455#ifdef CONFIG_FUNCTION_GRAPH_TRACER
2456 int graph = 0;
2457#endif
2458
2459 ksp = (unsigned long) _ksp;
2460 if (!tsk)
2461 tsk = current;
2462 tp = task_thread_info(tsk);
2463 if (ksp == 0UL) {
2464 if (tsk == current)
2465 asm("mov %%fp, %0" : "=r" (ksp));
2466 else
2467 ksp = tp->ksp;
2468 }
2469 if (tp == current_thread_info())
2470 flushw_all();
2471
2472 fp = ksp + STACK_BIAS;
2473
2474 printk("%sCall Trace:\n", loglvl);
2475 do {
2476 struct sparc_stackf *sf;
2477 struct pt_regs *regs;
2478 unsigned long pc;
2479
2480 if (!kstack_valid(tp, fp))
2481 break;
2482 sf = (struct sparc_stackf *) fp;
2483 regs = (struct pt_regs *) (sf + 1);
2484
2485 if (kstack_is_trap_frame(tp, regs)) {
2486 if (!(regs->tstate & TSTATE_PRIV))
2487 break;
2488 pc = regs->tpc;
2489 fp = regs->u_regs[UREG_I6] + STACK_BIAS;
2490 } else {
2491 pc = sf->callers_pc;
2492 fp = (unsigned long)sf->fp + STACK_BIAS;
2493 }
2494
2495 print_ip_sym(loglvl, pc);
2496#ifdef CONFIG_FUNCTION_GRAPH_TRACER
2497 if ((pc + 8UL) == (unsigned long) &return_to_handler) {
2498 struct ftrace_ret_stack *ret_stack;
2499 ret_stack = ftrace_graph_get_ret_stack(tsk, graph);
2500 if (ret_stack) {
2501 pc = ret_stack->ret;
2502 print_ip_sym(loglvl, pc);
2503 graph++;
2504 }
2505 }
2506#endif
2507 } while (++count < 16);
2508}
2509
2510static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
2511{
2512 unsigned long fp = rw->ins[6];
2513
2514 if (!fp)
2515 return NULL;
2516
2517 return (struct reg_window *) (fp + STACK_BIAS);
2518}
2519
2520void __noreturn die_if_kernel(char *str, struct pt_regs *regs)
2521{
2522 static int die_counter;
2523 int count = 0;
2524
2525 /* Amuse the user. */
2526 printk(
2527" \\|/ ____ \\|/\n"
2528" \"@'/ .. \\`@\"\n"
2529" /_| \\__/ |_\\\n"
2530" \\__U_/\n");
2531
2532 printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
2533 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
2534 __asm__ __volatile__("flushw");
2535 show_regs(regs);
2536 add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
2537 if (regs->tstate & TSTATE_PRIV) {
2538 struct thread_info *tp = current_thread_info();
2539 struct reg_window *rw = (struct reg_window *)
2540 (regs->u_regs[UREG_FP] + STACK_BIAS);
2541
2542 /* Stop the back trace when we hit userland or we
2543 * find some badly aligned kernel stack.
2544 */
2545 while (rw &&
2546 count++ < 30 &&
2547 kstack_valid(tp, (unsigned long) rw)) {
2548 printk("Caller[%016lx]: %pS\n", rw->ins[7],
2549 (void *) rw->ins[7]);
2550
2551 rw = kernel_stack_up(rw);
2552 }
2553 instruction_dump ((unsigned int *) regs->tpc);
2554 } else {
2555 if (test_thread_flag(TIF_32BIT)) {
2556 regs->tpc &= 0xffffffff;
2557 regs->tnpc &= 0xffffffff;
2558 }
2559 user_instruction_dump ((unsigned int __user *) regs->tpc);
2560 }
2561 if (panic_on_oops)
2562 panic("Fatal exception");
2563 make_task_dead((regs->tstate & TSTATE_PRIV)? SIGKILL : SIGSEGV);
2564}
2565EXPORT_SYMBOL(die_if_kernel);
2566
2567#define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19))
2568#define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
2569
2570void do_illegal_instruction(struct pt_regs *regs)
2571{
2572 enum ctx_state prev_state = exception_enter();
2573 unsigned long pc = regs->tpc;
2574 unsigned long tstate = regs->tstate;
2575 u32 insn;
2576
2577 if (notify_die(DIE_TRAP, "illegal instruction", regs,
2578 0, 0x10, SIGILL) == NOTIFY_STOP)
2579 goto out;
2580
2581 if (tstate & TSTATE_PRIV)
2582 die_if_kernel("Kernel illegal instruction", regs);
2583 if (test_thread_flag(TIF_32BIT))
2584 pc = (u32)pc;
2585 if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
2586 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
2587 if (handle_popc(insn, regs))
2588 goto out;
2589 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
2590 if (handle_ldf_stq(insn, regs))
2591 goto out;
2592 } else if (tlb_type == hypervisor) {
2593 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
2594 if (!vis_emul(regs, insn))
2595 goto out;
2596 } else {
2597 struct fpustate *f = FPUSTATE;
2598
2599 /* On UltraSPARC T2 and later, FPU insns which
2600 * are not implemented in HW signal an illegal
2601 * instruction trap and do not set the FP Trap
2602 * Trap in the %fsr to unimplemented_FPop.
2603 */
2604 if (do_mathemu(regs, f, true))
2605 goto out;
2606 }
2607 }
2608 }
2609 force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc);
2610out:
2611 exception_exit(prev_state);
2612}
2613
2614void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
2615{
2616 enum ctx_state prev_state = exception_enter();
2617
2618 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2619 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2620 goto out;
2621
2622 if (regs->tstate & TSTATE_PRIV) {
2623 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2624 goto out;
2625 }
2626 if (is_no_fault_exception(regs))
2627 return;
2628
2629 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)sfar);
2630out:
2631 exception_exit(prev_state);
2632}
2633
2634void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
2635{
2636 if (notify_die(DIE_TRAP, "memory address unaligned", regs,
2637 0, 0x34, SIGSEGV) == NOTIFY_STOP)
2638 return;
2639
2640 if (regs->tstate & TSTATE_PRIV) {
2641 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
2642 return;
2643 }
2644 if (is_no_fault_exception(regs))
2645 return;
2646
2647 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) addr);
2648}
2649
2650/* sun4v_mem_corrupt_detect_precise() - Handle precise exception on an ADI
2651 * tag mismatch.
2652 *
2653 * ADI version tag mismatch on a load from memory always results in a
2654 * precise exception. Tag mismatch on a store to memory will result in
2655 * precise exception if MCDPER or PMCDPER is set to 1.
2656 */
2657void sun4v_mem_corrupt_detect_precise(struct pt_regs *regs, unsigned long addr,
2658 unsigned long context)
2659{
2660 if (notify_die(DIE_TRAP, "memory corruption precise exception", regs,
2661 0, 0x8, SIGSEGV) == NOTIFY_STOP)
2662 return;
2663
2664 if (regs->tstate & TSTATE_PRIV) {
2665 /* MCD exception could happen because the task was running
2666 * a system call with MCD enabled and passed a non-versioned
2667 * pointer or pointer with bad version tag to the system
2668 * call.
2669 */
2670 const struct exception_table_entry *entry;
2671
2672 entry = search_exception_tables(regs->tpc);
2673 if (entry) {
2674 /* Looks like a bad syscall parameter */
2675#ifdef DEBUG_EXCEPTIONS
2676 pr_emerg("Exception: PC<%016lx> faddr<UNKNOWN>\n",
2677 regs->tpc);
2678 pr_emerg("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
2679 regs->tpc, entry->fixup);
2680#endif
2681 regs->tpc = entry->fixup;
2682 regs->tnpc = regs->tpc + 4;
2683 return;
2684 }
2685 pr_emerg("%s: ADDR[%016lx] CTX[%lx], going.\n",
2686 __func__, addr, context);
2687 die_if_kernel("MCD precise", regs);
2688 }
2689
2690 if (test_thread_flag(TIF_32BIT)) {
2691 regs->tpc &= 0xffffffff;
2692 regs->tnpc &= 0xffffffff;
2693 }
2694 force_sig_fault(SIGSEGV, SEGV_ADIPERR, (void __user *)addr);
2695}
2696
2697void do_privop(struct pt_regs *regs)
2698{
2699 enum ctx_state prev_state = exception_enter();
2700
2701 if (notify_die(DIE_TRAP, "privileged operation", regs,
2702 0, 0x11, SIGILL) == NOTIFY_STOP)
2703 goto out;
2704
2705 if (test_thread_flag(TIF_32BIT)) {
2706 regs->tpc &= 0xffffffff;
2707 regs->tnpc &= 0xffffffff;
2708 }
2709 force_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)regs->tpc);
2710out:
2711 exception_exit(prev_state);
2712}
2713
2714void do_privact(struct pt_regs *regs)
2715{
2716 do_privop(regs);
2717}
2718
2719/* Trap level 1 stuff or other traps we should never see... */
2720void do_cee(struct pt_regs *regs)
2721{
2722 exception_enter();
2723 die_if_kernel("TL0: Cache Error Exception", regs);
2724}
2725
2726void do_div0_tl1(struct pt_regs *regs)
2727{
2728 exception_enter();
2729 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2730 die_if_kernel("TL1: DIV0 Exception", regs);
2731}
2732
2733void do_fpieee_tl1(struct pt_regs *regs)
2734{
2735 exception_enter();
2736 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2737 die_if_kernel("TL1: FPU IEEE Exception", regs);
2738}
2739
2740void do_fpother_tl1(struct pt_regs *regs)
2741{
2742 exception_enter();
2743 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2744 die_if_kernel("TL1: FPU Other Exception", regs);
2745}
2746
2747void do_ill_tl1(struct pt_regs *regs)
2748{
2749 exception_enter();
2750 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2751 die_if_kernel("TL1: Illegal Instruction Exception", regs);
2752}
2753
2754void do_irq_tl1(struct pt_regs *regs)
2755{
2756 exception_enter();
2757 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2758 die_if_kernel("TL1: IRQ Exception", regs);
2759}
2760
2761void do_lddfmna_tl1(struct pt_regs *regs)
2762{
2763 exception_enter();
2764 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2765 die_if_kernel("TL1: LDDF Exception", regs);
2766}
2767
2768void do_stdfmna_tl1(struct pt_regs *regs)
2769{
2770 exception_enter();
2771 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2772 die_if_kernel("TL1: STDF Exception", regs);
2773}
2774
2775void do_paw(struct pt_regs *regs)
2776{
2777 exception_enter();
2778 die_if_kernel("TL0: Phys Watchpoint Exception", regs);
2779}
2780
2781void do_paw_tl1(struct pt_regs *regs)
2782{
2783 exception_enter();
2784 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2785 die_if_kernel("TL1: Phys Watchpoint Exception", regs);
2786}
2787
2788void do_vaw(struct pt_regs *regs)
2789{
2790 exception_enter();
2791 die_if_kernel("TL0: Virt Watchpoint Exception", regs);
2792}
2793
2794void do_vaw_tl1(struct pt_regs *regs)
2795{
2796 exception_enter();
2797 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2798 die_if_kernel("TL1: Virt Watchpoint Exception", regs);
2799}
2800
2801void do_tof_tl1(struct pt_regs *regs)
2802{
2803 exception_enter();
2804 dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
2805 die_if_kernel("TL1: Tag Overflow Exception", regs);
2806}
2807
2808void do_getpsr(struct pt_regs *regs)
2809{
2810 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate);
2811 regs->tpc = regs->tnpc;
2812 regs->tnpc += 4;
2813 if (test_thread_flag(TIF_32BIT)) {
2814 regs->tpc &= 0xffffffff;
2815 regs->tnpc &= 0xffffffff;
2816 }
2817}
2818
2819u64 cpu_mondo_counter[NR_CPUS] = {0};
2820struct trap_per_cpu trap_block[NR_CPUS];
2821EXPORT_SYMBOL(trap_block);
2822
2823/* This can get invoked before sched_init() so play it super safe
2824 * and use hard_smp_processor_id().
2825 */
2826void notrace init_cur_cpu_trap(struct thread_info *t)
2827{
2828 int cpu = hard_smp_processor_id();
2829 struct trap_per_cpu *p = &trap_block[cpu];
2830
2831 p->thread = t;
2832 p->pgd_paddr = 0;
2833}
2834
2835extern void thread_info_offsets_are_bolixed_dave(void);
2836extern void trap_per_cpu_offsets_are_bolixed_dave(void);
2837extern void tsb_config_offsets_are_bolixed_dave(void);
2838
2839/* Only invoked on boot processor. */
2840void __init trap_init(void)
2841{
2842 /* Compile time sanity check. */
2843 BUILD_BUG_ON(TI_TASK != offsetof(struct thread_info, task) ||
2844 TI_FLAGS != offsetof(struct thread_info, flags) ||
2845 TI_CPU != offsetof(struct thread_info, cpu) ||
2846 TI_FPSAVED != offsetof(struct thread_info, fpsaved) ||
2847 TI_KSP != offsetof(struct thread_info, ksp) ||
2848 TI_FAULT_ADDR != offsetof(struct thread_info,
2849 fault_address) ||
2850 TI_KREGS != offsetof(struct thread_info, kregs) ||
2851 TI_UTRAPS != offsetof(struct thread_info, utraps) ||
2852 TI_REG_WINDOW != offsetof(struct thread_info,
2853 reg_window) ||
2854 TI_RWIN_SPTRS != offsetof(struct thread_info,
2855 rwbuf_stkptrs) ||
2856 TI_GSR != offsetof(struct thread_info, gsr) ||
2857 TI_XFSR != offsetof(struct thread_info, xfsr) ||
2858 TI_PRE_COUNT != offsetof(struct thread_info,
2859 preempt_count) ||
2860 TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
2861 TI_KUNA_REGS != offsetof(struct thread_info,
2862 kern_una_regs) ||
2863 TI_KUNA_INSN != offsetof(struct thread_info,
2864 kern_una_insn) ||
2865 TI_FPREGS != offsetof(struct thread_info, fpregs) ||
2866 (TI_FPREGS & (64 - 1)));
2867
2868 BUILD_BUG_ON(TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu,
2869 thread) ||
2870 (TRAP_PER_CPU_PGD_PADDR !=
2871 offsetof(struct trap_per_cpu, pgd_paddr)) ||
2872 (TRAP_PER_CPU_CPU_MONDO_PA !=
2873 offsetof(struct trap_per_cpu, cpu_mondo_pa)) ||
2874 (TRAP_PER_CPU_DEV_MONDO_PA !=
2875 offsetof(struct trap_per_cpu, dev_mondo_pa)) ||
2876 (TRAP_PER_CPU_RESUM_MONDO_PA !=
2877 offsetof(struct trap_per_cpu, resum_mondo_pa)) ||
2878 (TRAP_PER_CPU_RESUM_KBUF_PA !=
2879 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) ||
2880 (TRAP_PER_CPU_NONRESUM_MONDO_PA !=
2881 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) ||
2882 (TRAP_PER_CPU_NONRESUM_KBUF_PA !=
2883 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) ||
2884 (TRAP_PER_CPU_FAULT_INFO !=
2885 offsetof(struct trap_per_cpu, fault_info)) ||
2886 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA !=
2887 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) ||
2888 (TRAP_PER_CPU_CPU_LIST_PA !=
2889 offsetof(struct trap_per_cpu, cpu_list_pa)) ||
2890 (TRAP_PER_CPU_TSB_HUGE !=
2891 offsetof(struct trap_per_cpu, tsb_huge)) ||
2892 (TRAP_PER_CPU_TSB_HUGE_TEMP !=
2893 offsetof(struct trap_per_cpu, tsb_huge_temp)) ||
2894 (TRAP_PER_CPU_IRQ_WORKLIST_PA !=
2895 offsetof(struct trap_per_cpu, irq_worklist_pa)) ||
2896 (TRAP_PER_CPU_CPU_MONDO_QMASK !=
2897 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) ||
2898 (TRAP_PER_CPU_DEV_MONDO_QMASK !=
2899 offsetof(struct trap_per_cpu, dev_mondo_qmask)) ||
2900 (TRAP_PER_CPU_RESUM_QMASK !=
2901 offsetof(struct trap_per_cpu, resum_qmask)) ||
2902 (TRAP_PER_CPU_NONRESUM_QMASK !=
2903 offsetof(struct trap_per_cpu, nonresum_qmask)) ||
2904 (TRAP_PER_CPU_PER_CPU_BASE !=
2905 offsetof(struct trap_per_cpu, __per_cpu_base)));
2906
2907 BUILD_BUG_ON((TSB_CONFIG_TSB !=
2908 offsetof(struct tsb_config, tsb)) ||
2909 (TSB_CONFIG_RSS_LIMIT !=
2910 offsetof(struct tsb_config, tsb_rss_limit)) ||
2911 (TSB_CONFIG_NENTRIES !=
2912 offsetof(struct tsb_config, tsb_nentries)) ||
2913 (TSB_CONFIG_REG_VAL !=
2914 offsetof(struct tsb_config, tsb_reg_val)) ||
2915 (TSB_CONFIG_MAP_VADDR !=
2916 offsetof(struct tsb_config, tsb_map_vaddr)) ||
2917 (TSB_CONFIG_MAP_PTE !=
2918 offsetof(struct tsb_config, tsb_map_pte)));
2919
2920 /* Attach to the address space of init_task. On SMP we
2921 * do this in smp.c:smp_callin for other cpus.
2922 */
2923 mmgrab(&init_mm);
2924 current->active_mm = &init_mm;
2925}