Commit | Line | Data |
---|---|---|
d979f179 | 1 | /* arch/sparc64/kernel/traps.c |
1da177e4 | 2 | * |
d979f179 | 3 | * Copyright (C) 1995,1997 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
4 | * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com) |
5 | */ | |
6 | ||
7 | /* | |
8 | * I like traps on v9, :)))) | |
9 | */ | |
10 | ||
1da177e4 | 11 | #include <linux/module.h> |
a2c1e064 | 12 | #include <linux/sched.h> |
1da177e4 LT |
13 | #include <linux/kernel.h> |
14 | #include <linux/kallsyms.h> | |
15 | #include <linux/signal.h> | |
16 | #include <linux/smp.h> | |
1da177e4 LT |
17 | #include <linux/mm.h> |
18 | #include <linux/init.h> | |
1eeb66a1 | 19 | #include <linux/kdebug.h> |
1da177e4 | 20 | |
2f4dfe20 | 21 | #include <asm/smp.h> |
1da177e4 LT |
22 | #include <asm/delay.h> |
23 | #include <asm/system.h> | |
24 | #include <asm/ptrace.h> | |
25 | #include <asm/oplib.h> | |
26 | #include <asm/page.h> | |
27 | #include <asm/pgtable.h> | |
28 | #include <asm/unistd.h> | |
29 | #include <asm/uaccess.h> | |
30 | #include <asm/fpumacro.h> | |
31 | #include <asm/lsu.h> | |
32 | #include <asm/dcu.h> | |
33 | #include <asm/estate.h> | |
34 | #include <asm/chafsr.h> | |
6c52a96e | 35 | #include <asm/sfafsr.h> |
1da177e4 LT |
36 | #include <asm/psrcompat.h> |
37 | #include <asm/processor.h> | |
38 | #include <asm/timer.h> | |
92704a1c | 39 | #include <asm/head.h> |
1da177e4 LT |
40 | #ifdef CONFIG_KMOD |
41 | #include <linux/kmod.h> | |
42 | #endif | |
07f8e5f3 | 43 | #include <asm/prom.h> |
1da177e4 | 44 | |
99cd2201 | 45 | #include "entry.h" |
1da177e4 LT |
46 | |
47 | /* When an irrecoverable trap occurs at tl > 0, the trap entry | |
48 | * code logs the trap state registers at every level in the trap | |
49 | * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout | |
50 | * is as follows: | |
51 | */ | |
52 | struct tl1_traplog { | |
53 | struct { | |
54 | unsigned long tstate; | |
55 | unsigned long tpc; | |
56 | unsigned long tnpc; | |
57 | unsigned long tt; | |
58 | } trapstack[4]; | |
59 | unsigned long tl; | |
60 | }; | |
61 | ||
62 | static void dump_tl1_traplog(struct tl1_traplog *p) | |
63 | { | |
3d6395cb | 64 | int i, limit; |
1da177e4 | 65 | |
04d74758 DM |
66 | printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, " |
67 | "dumping track stack.\n", p->tl); | |
3d6395cb DM |
68 | |
69 | limit = (tlb_type == hypervisor) ? 2 : 4; | |
39334a4b | 70 | for (i = 0; i < limit; i++) { |
04d74758 | 71 | printk(KERN_EMERG |
1da177e4 LT |
72 | "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] " |
73 | "TNPC[%016lx] TT[%lx]\n", | |
74 | i + 1, | |
75 | p->trapstack[i].tstate, p->trapstack[i].tpc, | |
76 | p->trapstack[i].tnpc, p->trapstack[i].tt); | |
5af47db7 | 77 | print_symbol("TRAPLOG: TPC<%s>\n", p->trapstack[i].tpc); |
1da177e4 LT |
78 | } |
79 | } | |
80 | ||
1da177e4 LT |
81 | void bad_trap(struct pt_regs *regs, long lvl) |
82 | { | |
83 | char buffer[32]; | |
84 | siginfo_t info; | |
85 | ||
86 | if (notify_die(DIE_TRAP, "bad trap", regs, | |
87 | 0, lvl, SIGTRAP) == NOTIFY_STOP) | |
88 | return; | |
89 | ||
90 | if (lvl < 0x100) { | |
91 | sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl); | |
92 | die_if_kernel(buffer, regs); | |
93 | } | |
94 | ||
95 | lvl -= 0x100; | |
96 | if (regs->tstate & TSTATE_PRIV) { | |
97 | sprintf(buffer, "Kernel bad sw trap %lx", lvl); | |
98 | die_if_kernel(buffer, regs); | |
99 | } | |
100 | if (test_thread_flag(TIF_32BIT)) { | |
101 | regs->tpc &= 0xffffffff; | |
102 | regs->tnpc &= 0xffffffff; | |
103 | } | |
104 | info.si_signo = SIGILL; | |
105 | info.si_errno = 0; | |
106 | info.si_code = ILL_ILLTRP; | |
107 | info.si_addr = (void __user *)regs->tpc; | |
108 | info.si_trapno = lvl; | |
109 | force_sig_info(SIGILL, &info, current); | |
110 | } | |
111 | ||
112 | void bad_trap_tl1(struct pt_regs *regs, long lvl) | |
113 | { | |
114 | char buffer[32]; | |
115 | ||
116 | if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs, | |
117 | 0, lvl, SIGTRAP) == NOTIFY_STOP) | |
118 | return; | |
119 | ||
120 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
121 | ||
122 | sprintf (buffer, "Bad trap %lx at tl>0", lvl); | |
123 | die_if_kernel (buffer, regs); | |
124 | } | |
125 | ||
126 | #ifdef CONFIG_DEBUG_BUGVERBOSE | |
127 | void do_BUG(const char *file, int line) | |
128 | { | |
129 | bust_spinlocks(1); | |
130 | printk("kernel BUG at %s:%d!\n", file, line); | |
131 | } | |
132 | #endif | |
133 | ||
6c52a96e | 134 | void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar) |
1da177e4 LT |
135 | { |
136 | siginfo_t info; | |
137 | ||
138 | if (notify_die(DIE_TRAP, "instruction access exception", regs, | |
139 | 0, 0x8, SIGTRAP) == NOTIFY_STOP) | |
140 | return; | |
141 | ||
142 | if (regs->tstate & TSTATE_PRIV) { | |
6c52a96e DM |
143 | printk("spitfire_insn_access_exception: SFSR[%016lx] " |
144 | "SFAR[%016lx], going.\n", sfsr, sfar); | |
1da177e4 LT |
145 | die_if_kernel("Iax", regs); |
146 | } | |
147 | if (test_thread_flag(TIF_32BIT)) { | |
148 | regs->tpc &= 0xffffffff; | |
149 | regs->tnpc &= 0xffffffff; | |
150 | } | |
151 | info.si_signo = SIGSEGV; | |
152 | info.si_errno = 0; | |
153 | info.si_code = SEGV_MAPERR; | |
154 | info.si_addr = (void __user *)regs->tpc; | |
155 | info.si_trapno = 0; | |
156 | force_sig_info(SIGSEGV, &info, current); | |
157 | } | |
158 | ||
6c52a96e | 159 | void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar) |
1da177e4 LT |
160 | { |
161 | if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs, | |
162 | 0, 0x8, SIGTRAP) == NOTIFY_STOP) | |
163 | return; | |
164 | ||
165 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
6c52a96e | 166 | spitfire_insn_access_exception(regs, sfsr, sfar); |
1da177e4 LT |
167 | } |
168 | ||
ed6b0b45 DM |
169 | void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) |
170 | { | |
171 | unsigned short type = (type_ctx >> 16); | |
172 | unsigned short ctx = (type_ctx & 0xffff); | |
173 | siginfo_t info; | |
174 | ||
175 | if (notify_die(DIE_TRAP, "instruction access exception", regs, | |
176 | 0, 0x8, SIGTRAP) == NOTIFY_STOP) | |
177 | return; | |
178 | ||
179 | if (regs->tstate & TSTATE_PRIV) { | |
180 | printk("sun4v_insn_access_exception: ADDR[%016lx] " | |
181 | "CTX[%04x] TYPE[%04x], going.\n", | |
182 | addr, ctx, type); | |
183 | die_if_kernel("Iax", regs); | |
184 | } | |
185 | ||
186 | if (test_thread_flag(TIF_32BIT)) { | |
187 | regs->tpc &= 0xffffffff; | |
188 | regs->tnpc &= 0xffffffff; | |
189 | } | |
190 | info.si_signo = SIGSEGV; | |
191 | info.si_errno = 0; | |
192 | info.si_code = SEGV_MAPERR; | |
193 | info.si_addr = (void __user *) addr; | |
194 | info.si_trapno = 0; | |
195 | force_sig_info(SIGSEGV, &info, current); | |
196 | } | |
197 | ||
198 | void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) | |
199 | { | |
200 | if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs, | |
201 | 0, 0x8, SIGTRAP) == NOTIFY_STOP) | |
202 | return; | |
203 | ||
204 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
205 | sun4v_insn_access_exception(regs, addr, type_ctx); | |
206 | } | |
207 | ||
6c52a96e | 208 | void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar) |
1da177e4 LT |
209 | { |
210 | siginfo_t info; | |
211 | ||
212 | if (notify_die(DIE_TRAP, "data access exception", regs, | |
213 | 0, 0x30, SIGTRAP) == NOTIFY_STOP) | |
214 | return; | |
215 | ||
216 | if (regs->tstate & TSTATE_PRIV) { | |
217 | /* Test if this comes from uaccess places. */ | |
8cf14af0 | 218 | const struct exception_table_entry *entry; |
1da177e4 | 219 | |
8cf14af0 DM |
220 | entry = search_exception_tables(regs->tpc); |
221 | if (entry) { | |
222 | /* Ouch, somebody is trying VM hole tricks on us... */ | |
1da177e4 LT |
223 | #ifdef DEBUG_EXCEPTIONS |
224 | printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc); | |
8cf14af0 DM |
225 | printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n", |
226 | regs->tpc, entry->fixup); | |
1da177e4 | 227 | #endif |
8cf14af0 | 228 | regs->tpc = entry->fixup; |
1da177e4 | 229 | regs->tnpc = regs->tpc + 4; |
1da177e4 LT |
230 | return; |
231 | } | |
232 | /* Shit... */ | |
6c52a96e DM |
233 | printk("spitfire_data_access_exception: SFSR[%016lx] " |
234 | "SFAR[%016lx], going.\n", sfsr, sfar); | |
1da177e4 LT |
235 | die_if_kernel("Dax", regs); |
236 | } | |
237 | ||
238 | info.si_signo = SIGSEGV; | |
239 | info.si_errno = 0; | |
240 | info.si_code = SEGV_MAPERR; | |
241 | info.si_addr = (void __user *)sfar; | |
242 | info.si_trapno = 0; | |
243 | force_sig_info(SIGSEGV, &info, current); | |
244 | } | |
245 | ||
6c52a96e | 246 | void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar) |
bde4e4ee DM |
247 | { |
248 | if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs, | |
249 | 0, 0x30, SIGTRAP) == NOTIFY_STOP) | |
250 | return; | |
251 | ||
252 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
6c52a96e | 253 | spitfire_data_access_exception(regs, sfsr, sfar); |
bde4e4ee DM |
254 | } |
255 | ||
ed6b0b45 DM |
256 | void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) |
257 | { | |
258 | unsigned short type = (type_ctx >> 16); | |
259 | unsigned short ctx = (type_ctx & 0xffff); | |
260 | siginfo_t info; | |
261 | ||
262 | if (notify_die(DIE_TRAP, "data access exception", regs, | |
263 | 0, 0x8, SIGTRAP) == NOTIFY_STOP) | |
264 | return; | |
265 | ||
266 | if (regs->tstate & TSTATE_PRIV) { | |
267 | printk("sun4v_data_access_exception: ADDR[%016lx] " | |
268 | "CTX[%04x] TYPE[%04x], going.\n", | |
269 | addr, ctx, type); | |
55555633 | 270 | die_if_kernel("Dax", regs); |
ed6b0b45 DM |
271 | } |
272 | ||
273 | if (test_thread_flag(TIF_32BIT)) { | |
274 | regs->tpc &= 0xffffffff; | |
275 | regs->tnpc &= 0xffffffff; | |
276 | } | |
277 | info.si_signo = SIGSEGV; | |
278 | info.si_errno = 0; | |
279 | info.si_code = SEGV_MAPERR; | |
280 | info.si_addr = (void __user *) addr; | |
281 | info.si_trapno = 0; | |
282 | force_sig_info(SIGSEGV, &info, current); | |
283 | } | |
284 | ||
285 | void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) | |
286 | { | |
287 | if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs, | |
288 | 0, 0x8, SIGTRAP) == NOTIFY_STOP) | |
289 | return; | |
290 | ||
291 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
292 | sun4v_data_access_exception(regs, addr, type_ctx); | |
293 | } | |
294 | ||
1da177e4 LT |
295 | #ifdef CONFIG_PCI |
296 | /* This is really pathetic... */ | |
297 | extern volatile int pci_poke_in_progress; | |
298 | extern volatile int pci_poke_cpu; | |
299 | extern volatile int pci_poke_faulted; | |
300 | #endif | |
301 | ||
302 | /* When access exceptions happen, we must do this. */ | |
303 | static void spitfire_clean_and_reenable_l1_caches(void) | |
304 | { | |
305 | unsigned long va; | |
306 | ||
307 | if (tlb_type != spitfire) | |
308 | BUG(); | |
309 | ||
310 | /* Clean 'em. */ | |
311 | for (va = 0; va < (PAGE_SIZE << 1); va += 32) { | |
312 | spitfire_put_icache_tag(va, 0x0); | |
313 | spitfire_put_dcache_tag(va, 0x0); | |
314 | } | |
315 | ||
316 | /* Re-enable in LSU. */ | |
317 | __asm__ __volatile__("flush %%g6\n\t" | |
318 | "membar #Sync\n\t" | |
319 | "stxa %0, [%%g0] %1\n\t" | |
320 | "membar #Sync" | |
321 | : /* no outputs */ | |
322 | : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC | | |
323 | LSU_CONTROL_IM | LSU_CONTROL_DM), | |
324 | "i" (ASI_LSU_CONTROL) | |
325 | : "memory"); | |
326 | } | |
327 | ||
6c52a96e | 328 | static void spitfire_enable_estate_errors(void) |
1da177e4 | 329 | { |
6c52a96e DM |
330 | __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" |
331 | "membar #Sync" | |
332 | : /* no outputs */ | |
333 | : "r" (ESTATE_ERR_ALL), | |
334 | "i" (ASI_ESTATE_ERROR_EN)); | |
1da177e4 LT |
335 | } |
336 | ||
337 | static char ecc_syndrome_table[] = { | |
338 | 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49, | |
339 | 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a, | |
340 | 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48, | |
341 | 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c, | |
342 | 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48, | |
343 | 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29, | |
344 | 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b, | |
345 | 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48, | |
346 | 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48, | |
347 | 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e, | |
348 | 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b, | |
349 | 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48, | |
350 | 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36, | |
351 | 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48, | |
352 | 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48, | |
353 | 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b, | |
354 | 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48, | |
355 | 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b, | |
356 | 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32, | |
357 | 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48, | |
358 | 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b, | |
359 | 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48, | |
360 | 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48, | |
361 | 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b, | |
362 | 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49, | |
363 | 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48, | |
364 | 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48, | |
365 | 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b, | |
366 | 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48, | |
367 | 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b, | |
368 | 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b, | |
369 | 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a | |
370 | }; | |
371 | ||
1da177e4 LT |
372 | static char *syndrome_unknown = "<Unknown>"; |
373 | ||
6c52a96e | 374 | static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit) |
1da177e4 | 375 | { |
6c52a96e DM |
376 | unsigned short scode; |
377 | char memmod_str[64], *p; | |
1da177e4 | 378 | |
6c52a96e DM |
379 | if (udbl & bit) { |
380 | scode = ecc_syndrome_table[udbl & 0xff]; | |
1da177e4 LT |
381 | if (prom_getunumber(scode, afar, |
382 | memmod_str, sizeof(memmod_str)) == -1) | |
383 | p = syndrome_unknown; | |
384 | else | |
385 | p = memmod_str; | |
386 | printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] " | |
387 | "Memory Module \"%s\"\n", | |
388 | smp_processor_id(), scode, p); | |
389 | } | |
390 | ||
6c52a96e DM |
391 | if (udbh & bit) { |
392 | scode = ecc_syndrome_table[udbh & 0xff]; | |
1da177e4 LT |
393 | if (prom_getunumber(scode, afar, |
394 | memmod_str, sizeof(memmod_str)) == -1) | |
395 | p = syndrome_unknown; | |
396 | else | |
397 | p = memmod_str; | |
398 | printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] " | |
399 | "Memory Module \"%s\"\n", | |
400 | smp_processor_id(), scode, p); | |
401 | } | |
6c52a96e DM |
402 | |
403 | } | |
404 | ||
405 | static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs) | |
406 | { | |
407 | ||
408 | printk(KERN_WARNING "CPU[%d]: Correctable ECC Error " | |
409 | "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n", | |
410 | smp_processor_id(), afsr, afar, udbl, udbh, tl1); | |
411 | ||
412 | spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE); | |
413 | ||
414 | /* We always log it, even if someone is listening for this | |
415 | * trap. | |
416 | */ | |
417 | notify_die(DIE_TRAP, "Correctable ECC Error", regs, | |
418 | 0, TRAP_TYPE_CEE, SIGTRAP); | |
419 | ||
420 | /* The Correctable ECC Error trap does not disable I/D caches. So | |
421 | * we only have to restore the ESTATE Error Enable register. | |
422 | */ | |
423 | spitfire_enable_estate_errors(); | |
424 | } | |
425 | ||
426 | static void spitfire_ue_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long tt, int tl1, struct pt_regs *regs) | |
427 | { | |
428 | siginfo_t info; | |
429 | ||
430 | printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] " | |
431 | "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n", | |
432 | smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1); | |
433 | ||
434 | /* XXX add more human friendly logging of the error status | |
435 | * XXX as is implemented for cheetah | |
436 | */ | |
437 | ||
438 | spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE); | |
439 | ||
440 | /* We always log it, even if someone is listening for this | |
441 | * trap. | |
442 | */ | |
443 | notify_die(DIE_TRAP, "Uncorrectable Error", regs, | |
444 | 0, tt, SIGTRAP); | |
445 | ||
446 | if (regs->tstate & TSTATE_PRIV) { | |
447 | if (tl1) | |
448 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
449 | die_if_kernel("UE", regs); | |
450 | } | |
451 | ||
452 | /* XXX need more intelligent processing here, such as is implemented | |
453 | * XXX for cheetah errors, in fact if the E-cache still holds the | |
454 | * XXX line with bad parity this will loop | |
455 | */ | |
456 | ||
457 | spitfire_clean_and_reenable_l1_caches(); | |
458 | spitfire_enable_estate_errors(); | |
459 | ||
460 | if (test_thread_flag(TIF_32BIT)) { | |
461 | regs->tpc &= 0xffffffff; | |
462 | regs->tnpc &= 0xffffffff; | |
463 | } | |
464 | info.si_signo = SIGBUS; | |
465 | info.si_errno = 0; | |
466 | info.si_code = BUS_OBJERR; | |
467 | info.si_addr = (void *)0; | |
468 | info.si_trapno = 0; | |
469 | force_sig_info(SIGBUS, &info, current); | |
470 | } | |
471 | ||
472 | void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar) | |
473 | { | |
474 | unsigned long afsr, tt, udbh, udbl; | |
475 | int tl1; | |
476 | ||
477 | afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT; | |
478 | tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT; | |
479 | tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0; | |
480 | udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT; | |
481 | udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT; | |
482 | ||
483 | #ifdef CONFIG_PCI | |
484 | if (tt == TRAP_TYPE_DAE && | |
485 | pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) { | |
486 | spitfire_clean_and_reenable_l1_caches(); | |
487 | spitfire_enable_estate_errors(); | |
488 | ||
489 | pci_poke_faulted = 1; | |
490 | regs->tnpc = regs->tpc + 4; | |
491 | return; | |
492 | } | |
493 | #endif | |
494 | ||
495 | if (afsr & SFAFSR_UE) | |
496 | spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs); | |
497 | ||
498 | if (tt == TRAP_TYPE_CEE) { | |
499 | /* Handle the case where we took a CEE trap, but ACK'd | |
500 | * only the UE state in the UDB error registers. | |
501 | */ | |
502 | if (afsr & SFAFSR_UE) { | |
503 | if (udbh & UDBE_CE) { | |
504 | __asm__ __volatile__( | |
505 | "stxa %0, [%1] %2\n\t" | |
506 | "membar #Sync" | |
507 | : /* no outputs */ | |
508 | : "r" (udbh & UDBE_CE), | |
509 | "r" (0x0), "i" (ASI_UDB_ERROR_W)); | |
510 | } | |
511 | if (udbl & UDBE_CE) { | |
512 | __asm__ __volatile__( | |
513 | "stxa %0, [%1] %2\n\t" | |
514 | "membar #Sync" | |
515 | : /* no outputs */ | |
516 | : "r" (udbl & UDBE_CE), | |
517 | "r" (0x18), "i" (ASI_UDB_ERROR_W)); | |
518 | } | |
519 | } | |
520 | ||
521 | spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs); | |
522 | } | |
1da177e4 LT |
523 | } |
524 | ||
816242da DM |
525 | int cheetah_pcache_forced_on; |
526 | ||
527 | void cheetah_enable_pcache(void) | |
528 | { | |
529 | unsigned long dcr; | |
530 | ||
531 | printk("CHEETAH: Enabling P-Cache on cpu %d.\n", | |
532 | smp_processor_id()); | |
533 | ||
534 | __asm__ __volatile__("ldxa [%%g0] %1, %0" | |
535 | : "=r" (dcr) | |
536 | : "i" (ASI_DCU_CONTROL_REG)); | |
537 | dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL); | |
538 | __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" | |
539 | "membar #Sync" | |
540 | : /* no outputs */ | |
541 | : "r" (dcr), "i" (ASI_DCU_CONTROL_REG)); | |
542 | } | |
543 | ||
1da177e4 LT |
544 | /* Cheetah error trap handling. */ |
545 | static unsigned long ecache_flush_physbase; | |
546 | static unsigned long ecache_flush_linesize; | |
547 | static unsigned long ecache_flush_size; | |
548 | ||
1da177e4 LT |
549 | /* This table is ordered in priority of errors and matches the |
550 | * AFAR overwrite policy as well. | |
551 | */ | |
552 | ||
553 | struct afsr_error_table { | |
554 | unsigned long mask; | |
555 | const char *name; | |
556 | }; | |
557 | ||
558 | static const char CHAFSR_PERR_msg[] = | |
559 | "System interface protocol error"; | |
560 | static const char CHAFSR_IERR_msg[] = | |
561 | "Internal processor error"; | |
562 | static const char CHAFSR_ISAP_msg[] = | |
563 | "System request parity error on incoming addresss"; | |
564 | static const char CHAFSR_UCU_msg[] = | |
565 | "Uncorrectable E-cache ECC error for ifetch/data"; | |
566 | static const char CHAFSR_UCC_msg[] = | |
567 | "SW Correctable E-cache ECC error for ifetch/data"; | |
568 | static const char CHAFSR_UE_msg[] = | |
569 | "Uncorrectable system bus data ECC error for read"; | |
570 | static const char CHAFSR_EDU_msg[] = | |
571 | "Uncorrectable E-cache ECC error for stmerge/blkld"; | |
572 | static const char CHAFSR_EMU_msg[] = | |
573 | "Uncorrectable system bus MTAG error"; | |
574 | static const char CHAFSR_WDU_msg[] = | |
575 | "Uncorrectable E-cache ECC error for writeback"; | |
576 | static const char CHAFSR_CPU_msg[] = | |
577 | "Uncorrectable ECC error for copyout"; | |
578 | static const char CHAFSR_CE_msg[] = | |
579 | "HW corrected system bus data ECC error for read"; | |
580 | static const char CHAFSR_EDC_msg[] = | |
581 | "HW corrected E-cache ECC error for stmerge/blkld"; | |
582 | static const char CHAFSR_EMC_msg[] = | |
583 | "HW corrected system bus MTAG ECC error"; | |
584 | static const char CHAFSR_WDC_msg[] = | |
585 | "HW corrected E-cache ECC error for writeback"; | |
586 | static const char CHAFSR_CPC_msg[] = | |
587 | "HW corrected ECC error for copyout"; | |
588 | static const char CHAFSR_TO_msg[] = | |
589 | "Unmapped error from system bus"; | |
590 | static const char CHAFSR_BERR_msg[] = | |
591 | "Bus error response from system bus"; | |
592 | static const char CHAFSR_IVC_msg[] = | |
593 | "HW corrected system bus data ECC error for ivec read"; | |
594 | static const char CHAFSR_IVU_msg[] = | |
595 | "Uncorrectable system bus data ECC error for ivec read"; | |
596 | static struct afsr_error_table __cheetah_error_table[] = { | |
597 | { CHAFSR_PERR, CHAFSR_PERR_msg }, | |
598 | { CHAFSR_IERR, CHAFSR_IERR_msg }, | |
599 | { CHAFSR_ISAP, CHAFSR_ISAP_msg }, | |
600 | { CHAFSR_UCU, CHAFSR_UCU_msg }, | |
601 | { CHAFSR_UCC, CHAFSR_UCC_msg }, | |
602 | { CHAFSR_UE, CHAFSR_UE_msg }, | |
603 | { CHAFSR_EDU, CHAFSR_EDU_msg }, | |
604 | { CHAFSR_EMU, CHAFSR_EMU_msg }, | |
605 | { CHAFSR_WDU, CHAFSR_WDU_msg }, | |
606 | { CHAFSR_CPU, CHAFSR_CPU_msg }, | |
607 | { CHAFSR_CE, CHAFSR_CE_msg }, | |
608 | { CHAFSR_EDC, CHAFSR_EDC_msg }, | |
609 | { CHAFSR_EMC, CHAFSR_EMC_msg }, | |
610 | { CHAFSR_WDC, CHAFSR_WDC_msg }, | |
611 | { CHAFSR_CPC, CHAFSR_CPC_msg }, | |
612 | { CHAFSR_TO, CHAFSR_TO_msg }, | |
613 | { CHAFSR_BERR, CHAFSR_BERR_msg }, | |
614 | /* These two do not update the AFAR. */ | |
615 | { CHAFSR_IVC, CHAFSR_IVC_msg }, | |
616 | { CHAFSR_IVU, CHAFSR_IVU_msg }, | |
617 | { 0, NULL }, | |
618 | }; | |
619 | static const char CHPAFSR_DTO_msg[] = | |
620 | "System bus unmapped error for prefetch/storequeue-read"; | |
621 | static const char CHPAFSR_DBERR_msg[] = | |
622 | "System bus error for prefetch/storequeue-read"; | |
623 | static const char CHPAFSR_THCE_msg[] = | |
624 | "Hardware corrected E-cache Tag ECC error"; | |
625 | static const char CHPAFSR_TSCE_msg[] = | |
626 | "SW handled correctable E-cache Tag ECC error"; | |
627 | static const char CHPAFSR_TUE_msg[] = | |
628 | "Uncorrectable E-cache Tag ECC error"; | |
629 | static const char CHPAFSR_DUE_msg[] = | |
630 | "System bus uncorrectable data ECC error due to prefetch/store-fill"; | |
631 | static struct afsr_error_table __cheetah_plus_error_table[] = { | |
632 | { CHAFSR_PERR, CHAFSR_PERR_msg }, | |
633 | { CHAFSR_IERR, CHAFSR_IERR_msg }, | |
634 | { CHAFSR_ISAP, CHAFSR_ISAP_msg }, | |
635 | { CHAFSR_UCU, CHAFSR_UCU_msg }, | |
636 | { CHAFSR_UCC, CHAFSR_UCC_msg }, | |
637 | { CHAFSR_UE, CHAFSR_UE_msg }, | |
638 | { CHAFSR_EDU, CHAFSR_EDU_msg }, | |
639 | { CHAFSR_EMU, CHAFSR_EMU_msg }, | |
640 | { CHAFSR_WDU, CHAFSR_WDU_msg }, | |
641 | { CHAFSR_CPU, CHAFSR_CPU_msg }, | |
642 | { CHAFSR_CE, CHAFSR_CE_msg }, | |
643 | { CHAFSR_EDC, CHAFSR_EDC_msg }, | |
644 | { CHAFSR_EMC, CHAFSR_EMC_msg }, | |
645 | { CHAFSR_WDC, CHAFSR_WDC_msg }, | |
646 | { CHAFSR_CPC, CHAFSR_CPC_msg }, | |
647 | { CHAFSR_TO, CHAFSR_TO_msg }, | |
648 | { CHAFSR_BERR, CHAFSR_BERR_msg }, | |
649 | { CHPAFSR_DTO, CHPAFSR_DTO_msg }, | |
650 | { CHPAFSR_DBERR, CHPAFSR_DBERR_msg }, | |
651 | { CHPAFSR_THCE, CHPAFSR_THCE_msg }, | |
652 | { CHPAFSR_TSCE, CHPAFSR_TSCE_msg }, | |
653 | { CHPAFSR_TUE, CHPAFSR_TUE_msg }, | |
654 | { CHPAFSR_DUE, CHPAFSR_DUE_msg }, | |
655 | /* These two do not update the AFAR. */ | |
656 | { CHAFSR_IVC, CHAFSR_IVC_msg }, | |
657 | { CHAFSR_IVU, CHAFSR_IVU_msg }, | |
658 | { 0, NULL }, | |
659 | }; | |
660 | static const char JPAFSR_JETO_msg[] = | |
661 | "System interface protocol error, hw timeout caused"; | |
662 | static const char JPAFSR_SCE_msg[] = | |
663 | "Parity error on system snoop results"; | |
664 | static const char JPAFSR_JEIC_msg[] = | |
665 | "System interface protocol error, illegal command detected"; | |
666 | static const char JPAFSR_JEIT_msg[] = | |
667 | "System interface protocol error, illegal ADTYPE detected"; | |
668 | static const char JPAFSR_OM_msg[] = | |
669 | "Out of range memory error has occurred"; | |
670 | static const char JPAFSR_ETP_msg[] = | |
671 | "Parity error on L2 cache tag SRAM"; | |
672 | static const char JPAFSR_UMS_msg[] = | |
673 | "Error due to unsupported store"; | |
674 | static const char JPAFSR_RUE_msg[] = | |
675 | "Uncorrectable ECC error from remote cache/memory"; | |
676 | static const char JPAFSR_RCE_msg[] = | |
677 | "Correctable ECC error from remote cache/memory"; | |
678 | static const char JPAFSR_BP_msg[] = | |
679 | "JBUS parity error on returned read data"; | |
680 | static const char JPAFSR_WBP_msg[] = | |
681 | "JBUS parity error on data for writeback or block store"; | |
682 | static const char JPAFSR_FRC_msg[] = | |
683 | "Foreign read to DRAM incurring correctable ECC error"; | |
684 | static const char JPAFSR_FRU_msg[] = | |
685 | "Foreign read to DRAM incurring uncorrectable ECC error"; | |
686 | static struct afsr_error_table __jalapeno_error_table[] = { | |
687 | { JPAFSR_JETO, JPAFSR_JETO_msg }, | |
688 | { JPAFSR_SCE, JPAFSR_SCE_msg }, | |
689 | { JPAFSR_JEIC, JPAFSR_JEIC_msg }, | |
690 | { JPAFSR_JEIT, JPAFSR_JEIT_msg }, | |
691 | { CHAFSR_PERR, CHAFSR_PERR_msg }, | |
692 | { CHAFSR_IERR, CHAFSR_IERR_msg }, | |
693 | { CHAFSR_ISAP, CHAFSR_ISAP_msg }, | |
694 | { CHAFSR_UCU, CHAFSR_UCU_msg }, | |
695 | { CHAFSR_UCC, CHAFSR_UCC_msg }, | |
696 | { CHAFSR_UE, CHAFSR_UE_msg }, | |
697 | { CHAFSR_EDU, CHAFSR_EDU_msg }, | |
698 | { JPAFSR_OM, JPAFSR_OM_msg }, | |
699 | { CHAFSR_WDU, CHAFSR_WDU_msg }, | |
700 | { CHAFSR_CPU, CHAFSR_CPU_msg }, | |
701 | { CHAFSR_CE, CHAFSR_CE_msg }, | |
702 | { CHAFSR_EDC, CHAFSR_EDC_msg }, | |
703 | { JPAFSR_ETP, JPAFSR_ETP_msg }, | |
704 | { CHAFSR_WDC, CHAFSR_WDC_msg }, | |
705 | { CHAFSR_CPC, CHAFSR_CPC_msg }, | |
706 | { CHAFSR_TO, CHAFSR_TO_msg }, | |
707 | { CHAFSR_BERR, CHAFSR_BERR_msg }, | |
708 | { JPAFSR_UMS, JPAFSR_UMS_msg }, | |
709 | { JPAFSR_RUE, JPAFSR_RUE_msg }, | |
710 | { JPAFSR_RCE, JPAFSR_RCE_msg }, | |
711 | { JPAFSR_BP, JPAFSR_BP_msg }, | |
712 | { JPAFSR_WBP, JPAFSR_WBP_msg }, | |
713 | { JPAFSR_FRC, JPAFSR_FRC_msg }, | |
714 | { JPAFSR_FRU, JPAFSR_FRU_msg }, | |
715 | /* These two do not update the AFAR. */ | |
716 | { CHAFSR_IVU, CHAFSR_IVU_msg }, | |
717 | { 0, NULL }, | |
718 | }; | |
719 | static struct afsr_error_table *cheetah_error_table; | |
720 | static unsigned long cheetah_afsr_errors; | |
721 | ||
1da177e4 LT |
722 | struct cheetah_err_info *cheetah_error_log; |
723 | ||
d979f179 | 724 | static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr) |
1da177e4 LT |
725 | { |
726 | struct cheetah_err_info *p; | |
727 | int cpu = smp_processor_id(); | |
728 | ||
729 | if (!cheetah_error_log) | |
730 | return NULL; | |
731 | ||
732 | p = cheetah_error_log + (cpu * 2); | |
733 | if ((afsr & CHAFSR_TL1) != 0UL) | |
734 | p++; | |
735 | ||
736 | return p; | |
737 | } | |
738 | ||
739 | extern unsigned int tl0_icpe[], tl1_icpe[]; | |
740 | extern unsigned int tl0_dcpe[], tl1_dcpe[]; | |
741 | extern unsigned int tl0_fecc[], tl1_fecc[]; | |
742 | extern unsigned int tl0_cee[], tl1_cee[]; | |
743 | extern unsigned int tl0_iae[], tl1_iae[]; | |
744 | extern unsigned int tl0_dae[], tl1_dae[]; | |
745 | extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[]; | |
746 | extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[]; | |
747 | extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[]; | |
748 | extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[]; | |
749 | extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[]; | |
750 | ||
751 | void __init cheetah_ecache_flush_init(void) | |
752 | { | |
753 | unsigned long largest_size, smallest_linesize, order, ver; | |
5cbc3073 | 754 | int i, sz; |
1da177e4 LT |
755 | |
756 | /* Scan all cpu device tree nodes, note two values: | |
757 | * 1) largest E-cache size | |
758 | * 2) smallest E-cache line size | |
759 | */ | |
760 | largest_size = 0UL; | |
761 | smallest_linesize = ~0UL; | |
762 | ||
5cbc3073 | 763 | for (i = 0; i < NR_CPUS; i++) { |
1da177e4 LT |
764 | unsigned long val; |
765 | ||
5cbc3073 DM |
766 | val = cpu_data(i).ecache_size; |
767 | if (!val) | |
768 | continue; | |
769 | ||
1da177e4 LT |
770 | if (val > largest_size) |
771 | largest_size = val; | |
5cbc3073 DM |
772 | |
773 | val = cpu_data(i).ecache_line_size; | |
1da177e4 LT |
774 | if (val < smallest_linesize) |
775 | smallest_linesize = val; | |
5cbc3073 | 776 | |
1da177e4 LT |
777 | } |
778 | ||
779 | if (largest_size == 0UL || smallest_linesize == ~0UL) { | |
780 | prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache " | |
781 | "parameters.\n"); | |
782 | prom_halt(); | |
783 | } | |
784 | ||
785 | ecache_flush_size = (2 * largest_size); | |
786 | ecache_flush_linesize = smallest_linesize; | |
787 | ||
10147570 | 788 | ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size); |
1da177e4 | 789 | |
10147570 | 790 | if (ecache_flush_physbase == ~0UL) { |
1da177e4 | 791 | prom_printf("cheetah_ecache_flush_init: Cannot find %d byte " |
10147570 DM |
792 | "contiguous physical memory.\n", |
793 | ecache_flush_size); | |
1da177e4 LT |
794 | prom_halt(); |
795 | } | |
796 | ||
797 | /* Now allocate error trap reporting scoreboard. */ | |
07f8e5f3 | 798 | sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info)); |
1da177e4 | 799 | for (order = 0; order < MAX_ORDER; order++) { |
07f8e5f3 | 800 | if ((PAGE_SIZE << order) >= sz) |
1da177e4 LT |
801 | break; |
802 | } | |
803 | cheetah_error_log = (struct cheetah_err_info *) | |
804 | __get_free_pages(GFP_KERNEL, order); | |
805 | if (!cheetah_error_log) { | |
806 | prom_printf("cheetah_ecache_flush_init: Failed to allocate " | |
07f8e5f3 | 807 | "error logging scoreboard (%d bytes).\n", sz); |
1da177e4 LT |
808 | prom_halt(); |
809 | } | |
810 | memset(cheetah_error_log, 0, PAGE_SIZE << order); | |
811 | ||
812 | /* Mark all AFSRs as invalid so that the trap handler will | |
813 | * log new new information there. | |
814 | */ | |
815 | for (i = 0; i < 2 * NR_CPUS; i++) | |
816 | cheetah_error_log[i].afsr = CHAFSR_INVALID; | |
817 | ||
818 | __asm__ ("rdpr %%ver, %0" : "=r" (ver)); | |
92704a1c DM |
819 | if ((ver >> 32) == __JALAPENO_ID || |
820 | (ver >> 32) == __SERRANO_ID) { | |
1da177e4 LT |
821 | cheetah_error_table = &__jalapeno_error_table[0]; |
822 | cheetah_afsr_errors = JPAFSR_ERRORS; | |
823 | } else if ((ver >> 32) == 0x003e0015) { | |
824 | cheetah_error_table = &__cheetah_plus_error_table[0]; | |
825 | cheetah_afsr_errors = CHPAFSR_ERRORS; | |
826 | } else { | |
827 | cheetah_error_table = &__cheetah_error_table[0]; | |
828 | cheetah_afsr_errors = CHAFSR_ERRORS; | |
829 | } | |
830 | ||
831 | /* Now patch trap tables. */ | |
832 | memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4)); | |
833 | memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4)); | |
834 | memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4)); | |
835 | memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4)); | |
836 | memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4)); | |
837 | memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4)); | |
838 | memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4)); | |
839 | memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4)); | |
840 | if (tlb_type == cheetah_plus) { | |
841 | memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4)); | |
842 | memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4)); | |
843 | memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4)); | |
844 | memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4)); | |
845 | } | |
846 | flushi(PAGE_OFFSET); | |
847 | } | |
848 | ||
849 | static void cheetah_flush_ecache(void) | |
850 | { | |
851 | unsigned long flush_base = ecache_flush_physbase; | |
852 | unsigned long flush_linesize = ecache_flush_linesize; | |
853 | unsigned long flush_size = ecache_flush_size; | |
854 | ||
855 | __asm__ __volatile__("1: subcc %0, %4, %0\n\t" | |
856 | " bne,pt %%xcc, 1b\n\t" | |
857 | " ldxa [%2 + %0] %3, %%g0\n\t" | |
858 | : "=&r" (flush_size) | |
859 | : "0" (flush_size), "r" (flush_base), | |
860 | "i" (ASI_PHYS_USE_EC), "r" (flush_linesize)); | |
861 | } | |
862 | ||
863 | static void cheetah_flush_ecache_line(unsigned long physaddr) | |
864 | { | |
865 | unsigned long alias; | |
866 | ||
867 | physaddr &= ~(8UL - 1UL); | |
868 | physaddr = (ecache_flush_physbase + | |
869 | (physaddr & ((ecache_flush_size>>1UL) - 1UL))); | |
870 | alias = physaddr + (ecache_flush_size >> 1UL); | |
871 | __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t" | |
872 | "ldxa [%1] %2, %%g0\n\t" | |
873 | "membar #Sync" | |
874 | : /* no outputs */ | |
875 | : "r" (physaddr), "r" (alias), | |
876 | "i" (ASI_PHYS_USE_EC)); | |
877 | } | |
878 | ||
879 | /* Unfortunately, the diagnostic access to the I-cache tags we need to | |
880 | * use to clear the thing interferes with I-cache coherency transactions. | |
881 | * | |
882 | * So we must only flush the I-cache when it is disabled. | |
883 | */ | |
884 | static void __cheetah_flush_icache(void) | |
885 | { | |
80dc0d6b DM |
886 | unsigned int icache_size, icache_line_size; |
887 | unsigned long addr; | |
888 | ||
889 | icache_size = local_cpu_data().icache_size; | |
890 | icache_line_size = local_cpu_data().icache_line_size; | |
1da177e4 LT |
891 | |
892 | /* Clear the valid bits in all the tags. */ | |
80dc0d6b | 893 | for (addr = 0; addr < icache_size; addr += icache_line_size) { |
1da177e4 LT |
894 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" |
895 | "membar #Sync" | |
896 | : /* no outputs */ | |
80dc0d6b DM |
897 | : "r" (addr | (2 << 3)), |
898 | "i" (ASI_IC_TAG)); | |
1da177e4 LT |
899 | } |
900 | } | |
901 | ||
902 | static void cheetah_flush_icache(void) | |
903 | { | |
904 | unsigned long dcu_save; | |
905 | ||
906 | /* Save current DCU, disable I-cache. */ | |
907 | __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t" | |
908 | "or %0, %2, %%g1\n\t" | |
909 | "stxa %%g1, [%%g0] %1\n\t" | |
910 | "membar #Sync" | |
911 | : "=r" (dcu_save) | |
912 | : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC) | |
913 | : "g1"); | |
914 | ||
915 | __cheetah_flush_icache(); | |
916 | ||
917 | /* Restore DCU register */ | |
918 | __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" | |
919 | "membar #Sync" | |
920 | : /* no outputs */ | |
921 | : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG)); | |
922 | } | |
923 | ||
924 | static void cheetah_flush_dcache(void) | |
925 | { | |
80dc0d6b DM |
926 | unsigned int dcache_size, dcache_line_size; |
927 | unsigned long addr; | |
928 | ||
929 | dcache_size = local_cpu_data().dcache_size; | |
930 | dcache_line_size = local_cpu_data().dcache_line_size; | |
1da177e4 | 931 | |
80dc0d6b | 932 | for (addr = 0; addr < dcache_size; addr += dcache_line_size) { |
1da177e4 LT |
933 | __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" |
934 | "membar #Sync" | |
935 | : /* no outputs */ | |
80dc0d6b | 936 | : "r" (addr), "i" (ASI_DCACHE_TAG)); |
1da177e4 LT |
937 | } |
938 | } | |
939 | ||
940 | /* In order to make the even parity correct we must do two things. | |
941 | * First, we clear DC_data_parity and set DC_utag to an appropriate value. | |
942 | * Next, we clear out all 32-bytes of data for that line. Data of | |
943 | * all-zero + tag parity value of zero == correct parity. | |
944 | */ | |
945 | static void cheetah_plus_zap_dcache_parity(void) | |
946 | { | |
80dc0d6b DM |
947 | unsigned int dcache_size, dcache_line_size; |
948 | unsigned long addr; | |
949 | ||
950 | dcache_size = local_cpu_data().dcache_size; | |
951 | dcache_line_size = local_cpu_data().dcache_line_size; | |
1da177e4 | 952 | |
80dc0d6b DM |
953 | for (addr = 0; addr < dcache_size; addr += dcache_line_size) { |
954 | unsigned long tag = (addr >> 14); | |
955 | unsigned long line; | |
1da177e4 LT |
956 | |
957 | __asm__ __volatile__("membar #Sync\n\t" | |
958 | "stxa %0, [%1] %2\n\t" | |
959 | "membar #Sync" | |
960 | : /* no outputs */ | |
80dc0d6b | 961 | : "r" (tag), "r" (addr), |
1da177e4 | 962 | "i" (ASI_DCACHE_UTAG)); |
80dc0d6b | 963 | for (line = addr; line < addr + dcache_line_size; line += 8) |
1da177e4 LT |
964 | __asm__ __volatile__("membar #Sync\n\t" |
965 | "stxa %%g0, [%0] %1\n\t" | |
966 | "membar #Sync" | |
967 | : /* no outputs */ | |
80dc0d6b DM |
968 | : "r" (line), |
969 | "i" (ASI_DCACHE_DATA)); | |
1da177e4 LT |
970 | } |
971 | } | |
972 | ||
973 | /* Conversion tables used to frob Cheetah AFSR syndrome values into | |
974 | * something palatable to the memory controller driver get_unumber | |
975 | * routine. | |
976 | */ | |
977 | #define MT0 137 | |
978 | #define MT1 138 | |
979 | #define MT2 139 | |
980 | #define NONE 254 | |
981 | #define MTC0 140 | |
982 | #define MTC1 141 | |
983 | #define MTC2 142 | |
984 | #define MTC3 143 | |
985 | #define C0 128 | |
986 | #define C1 129 | |
987 | #define C2 130 | |
988 | #define C3 131 | |
989 | #define C4 132 | |
990 | #define C5 133 | |
991 | #define C6 134 | |
992 | #define C7 135 | |
993 | #define C8 136 | |
994 | #define M2 144 | |
995 | #define M3 145 | |
996 | #define M4 146 | |
997 | #define M 147 | |
998 | static unsigned char cheetah_ecc_syntab[] = { | |
999 | /*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M, | |
1000 | /*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16, | |
1001 | /*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10, | |
1002 | /*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M, | |
1003 | /*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6, | |
1004 | /*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4, | |
1005 | /*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4, | |
1006 | /*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3, | |
1007 | /*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5, | |
1008 | /*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M, | |
1009 | /*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2, | |
1010 | /*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3, | |
1011 | /*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M, | |
1012 | /*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3, | |
1013 | /*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M, | |
1014 | /*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M, | |
1015 | /*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4, | |
1016 | /*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M, | |
1017 | /*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2, | |
1018 | /*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M, | |
1019 | /*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4, | |
1020 | /*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3, | |
1021 | /*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3, | |
1022 | /*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2, | |
1023 | /*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4, | |
1024 | /*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M, | |
1025 | /*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3, | |
1026 | /*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M, | |
1027 | /*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3, | |
1028 | /*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M, | |
1029 | /*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M, | |
1030 | /*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M | |
1031 | }; | |
1032 | static unsigned char cheetah_mtag_syntab[] = { | |
1033 | NONE, MTC0, | |
1034 | MTC1, NONE, | |
1035 | MTC2, NONE, | |
1036 | NONE, MT0, | |
1037 | MTC3, NONE, | |
1038 | NONE, MT1, | |
1039 | NONE, MT2, | |
1040 | NONE, NONE | |
1041 | }; | |
1042 | ||
1043 | /* Return the highest priority error conditon mentioned. */ | |
d979f179 | 1044 | static inline unsigned long cheetah_get_hipri(unsigned long afsr) |
1da177e4 LT |
1045 | { |
1046 | unsigned long tmp = 0; | |
1047 | int i; | |
1048 | ||
1049 | for (i = 0; cheetah_error_table[i].mask; i++) { | |
1050 | if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL) | |
1051 | return tmp; | |
1052 | } | |
1053 | return tmp; | |
1054 | } | |
1055 | ||
1056 | static const char *cheetah_get_string(unsigned long bit) | |
1057 | { | |
1058 | int i; | |
1059 | ||
1060 | for (i = 0; cheetah_error_table[i].mask; i++) { | |
1061 | if ((bit & cheetah_error_table[i].mask) != 0UL) | |
1062 | return cheetah_error_table[i].name; | |
1063 | } | |
1064 | return "???"; | |
1065 | } | |
1066 | ||
1067 | extern int chmc_getunumber(int, unsigned long, char *, int); | |
1068 | ||
1069 | static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info, | |
1070 | unsigned long afsr, unsigned long afar, int recoverable) | |
1071 | { | |
1072 | unsigned long hipri; | |
1073 | char unum[256]; | |
1074 | ||
1075 | printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n", | |
1076 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), | |
1077 | afsr, afar, | |
1078 | (afsr & CHAFSR_TL1) ? 1 : 0); | |
955c054f | 1079 | printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n", |
1da177e4 | 1080 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), |
955c054f | 1081 | regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate); |
5af47db7 DM |
1082 | printk("%s" "ERROR(%d): ", |
1083 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id()); | |
1084 | print_symbol("TPC<%s>\n", regs->tpc); | |
1da177e4 LT |
1085 | printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n", |
1086 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), | |
1087 | (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT, | |
1088 | (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT, | |
1089 | (afsr & CHAFSR_ME) ? ", Multiple Errors" : "", | |
1090 | (afsr & CHAFSR_PRIV) ? ", Privileged" : ""); | |
1091 | hipri = cheetah_get_hipri(afsr); | |
1092 | printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n", | |
1093 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), | |
1094 | hipri, cheetah_get_string(hipri)); | |
1095 | ||
1096 | /* Try to get unumber if relevant. */ | |
1097 | #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \ | |
1098 | CHAFSR_CPC | CHAFSR_CPU | \ | |
1099 | CHAFSR_UE | CHAFSR_CE | \ | |
1100 | CHAFSR_EDC | CHAFSR_EDU | \ | |
1101 | CHAFSR_UCC | CHAFSR_UCU | \ | |
1102 | CHAFSR_WDU | CHAFSR_WDC) | |
1103 | #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU) | |
1104 | if (afsr & ESYND_ERRORS) { | |
1105 | int syndrome; | |
1106 | int ret; | |
1107 | ||
1108 | syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT; | |
1109 | syndrome = cheetah_ecc_syntab[syndrome]; | |
1110 | ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum)); | |
1111 | if (ret != -1) | |
1112 | printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n", | |
1113 | (recoverable ? KERN_WARNING : KERN_CRIT), | |
1114 | smp_processor_id(), unum); | |
1115 | } else if (afsr & MSYND_ERRORS) { | |
1116 | int syndrome; | |
1117 | int ret; | |
1118 | ||
1119 | syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT; | |
1120 | syndrome = cheetah_mtag_syntab[syndrome]; | |
1121 | ret = chmc_getunumber(syndrome, afar, unum, sizeof(unum)); | |
1122 | if (ret != -1) | |
1123 | printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n", | |
1124 | (recoverable ? KERN_WARNING : KERN_CRIT), | |
1125 | smp_processor_id(), unum); | |
1126 | } | |
1127 | ||
1128 | /* Now dump the cache snapshots. */ | |
1129 | printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx]\n", | |
1130 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), | |
1131 | (int) info->dcache_index, | |
1132 | info->dcache_tag, | |
1133 | info->dcache_utag, | |
1134 | info->dcache_stag); | |
1135 | printk("%s" "ERROR(%d): D-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n", | |
1136 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), | |
1137 | info->dcache_data[0], | |
1138 | info->dcache_data[1], | |
1139 | info->dcache_data[2], | |
1140 | info->dcache_data[3]); | |
1141 | printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016lx] utag[%016lx] stag[%016lx] " | |
1142 | "u[%016lx] l[%016lx]\n", | |
1143 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), | |
1144 | (int) info->icache_index, | |
1145 | info->icache_tag, | |
1146 | info->icache_utag, | |
1147 | info->icache_stag, | |
1148 | info->icache_upper, | |
1149 | info->icache_lower); | |
1150 | printk("%s" "ERROR(%d): I-cache INSN0[%016lx] INSN1[%016lx] INSN2[%016lx] INSN3[%016lx]\n", | |
1151 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), | |
1152 | info->icache_data[0], | |
1153 | info->icache_data[1], | |
1154 | info->icache_data[2], | |
1155 | info->icache_data[3]); | |
1156 | printk("%s" "ERROR(%d): I-cache INSN4[%016lx] INSN5[%016lx] INSN6[%016lx] INSN7[%016lx]\n", | |
1157 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), | |
1158 | info->icache_data[4], | |
1159 | info->icache_data[5], | |
1160 | info->icache_data[6], | |
1161 | info->icache_data[7]); | |
1162 | printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016lx]\n", | |
1163 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), | |
1164 | (int) info->ecache_index, info->ecache_tag); | |
1165 | printk("%s" "ERROR(%d): E-cache data0[%016lx] data1[%016lx] data2[%016lx] data3[%016lx]\n", | |
1166 | (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), | |
1167 | info->ecache_data[0], | |
1168 | info->ecache_data[1], | |
1169 | info->ecache_data[2], | |
1170 | info->ecache_data[3]); | |
1171 | ||
1172 | afsr = (afsr & ~hipri) & cheetah_afsr_errors; | |
1173 | while (afsr != 0UL) { | |
1174 | unsigned long bit = cheetah_get_hipri(afsr); | |
1175 | ||
1176 | printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n", | |
1177 | (recoverable ? KERN_WARNING : KERN_CRIT), | |
1178 | bit, cheetah_get_string(bit)); | |
1179 | ||
1180 | afsr &= ~bit; | |
1181 | } | |
1182 | ||
1183 | if (!recoverable) | |
1184 | printk(KERN_CRIT "ERROR: This condition is not recoverable.\n"); | |
1185 | } | |
1186 | ||
1187 | static int cheetah_recheck_errors(struct cheetah_err_info *logp) | |
1188 | { | |
1189 | unsigned long afsr, afar; | |
1190 | int ret = 0; | |
1191 | ||
1192 | __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t" | |
1193 | : "=r" (afsr) | |
1194 | : "i" (ASI_AFSR)); | |
1195 | if ((afsr & cheetah_afsr_errors) != 0) { | |
1196 | if (logp != NULL) { | |
1197 | __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t" | |
1198 | : "=r" (afar) | |
1199 | : "i" (ASI_AFAR)); | |
1200 | logp->afsr = afsr; | |
1201 | logp->afar = afar; | |
1202 | } | |
1203 | ret = 1; | |
1204 | } | |
1205 | __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" | |
1206 | "membar #Sync\n\t" | |
1207 | : : "r" (afsr), "i" (ASI_AFSR)); | |
1208 | ||
1209 | return ret; | |
1210 | } | |
1211 | ||
1212 | void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar) | |
1213 | { | |
1214 | struct cheetah_err_info local_snapshot, *p; | |
1215 | int recoverable; | |
1216 | ||
1217 | /* Flush E-cache */ | |
1218 | cheetah_flush_ecache(); | |
1219 | ||
1220 | p = cheetah_get_error_log(afsr); | |
1221 | if (!p) { | |
1222 | prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n", | |
1223 | afsr, afar); | |
1224 | prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n", | |
1225 | smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate); | |
1226 | prom_halt(); | |
1227 | } | |
1228 | ||
1229 | /* Grab snapshot of logged error. */ | |
1230 | memcpy(&local_snapshot, p, sizeof(local_snapshot)); | |
1231 | ||
1232 | /* If the current trap snapshot does not match what the | |
1233 | * trap handler passed along into our args, big trouble. | |
1234 | * In such a case, mark the local copy as invalid. | |
1235 | * | |
1236 | * Else, it matches and we mark the afsr in the non-local | |
1237 | * copy as invalid so we may log new error traps there. | |
1238 | */ | |
1239 | if (p->afsr != afsr || p->afar != afar) | |
1240 | local_snapshot.afsr = CHAFSR_INVALID; | |
1241 | else | |
1242 | p->afsr = CHAFSR_INVALID; | |
1243 | ||
1244 | cheetah_flush_icache(); | |
1245 | cheetah_flush_dcache(); | |
1246 | ||
1247 | /* Re-enable I-cache/D-cache */ | |
1248 | __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" | |
1249 | "or %%g1, %1, %%g1\n\t" | |
1250 | "stxa %%g1, [%%g0] %0\n\t" | |
1251 | "membar #Sync" | |
1252 | : /* no outputs */ | |
1253 | : "i" (ASI_DCU_CONTROL_REG), | |
1254 | "i" (DCU_DC | DCU_IC) | |
1255 | : "g1"); | |
1256 | ||
1257 | /* Re-enable error reporting */ | |
1258 | __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" | |
1259 | "or %%g1, %1, %%g1\n\t" | |
1260 | "stxa %%g1, [%%g0] %0\n\t" | |
1261 | "membar #Sync" | |
1262 | : /* no outputs */ | |
1263 | : "i" (ASI_ESTATE_ERROR_EN), | |
1264 | "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN) | |
1265 | : "g1"); | |
1266 | ||
1267 | /* Decide if we can continue after handling this trap and | |
1268 | * logging the error. | |
1269 | */ | |
1270 | recoverable = 1; | |
1271 | if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP)) | |
1272 | recoverable = 0; | |
1273 | ||
1274 | /* Re-check AFSR/AFAR. What we are looking for here is whether a new | |
1275 | * error was logged while we had error reporting traps disabled. | |
1276 | */ | |
1277 | if (cheetah_recheck_errors(&local_snapshot)) { | |
1278 | unsigned long new_afsr = local_snapshot.afsr; | |
1279 | ||
1280 | /* If we got a new asynchronous error, die... */ | |
1281 | if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU | | |
1282 | CHAFSR_WDU | CHAFSR_CPU | | |
1283 | CHAFSR_IVU | CHAFSR_UE | | |
1284 | CHAFSR_BERR | CHAFSR_TO)) | |
1285 | recoverable = 0; | |
1286 | } | |
1287 | ||
1288 | /* Log errors. */ | |
1289 | cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable); | |
1290 | ||
1291 | if (!recoverable) | |
1292 | panic("Irrecoverable Fast-ECC error trap.\n"); | |
1293 | ||
1294 | /* Flush E-cache to kick the error trap handlers out. */ | |
1295 | cheetah_flush_ecache(); | |
1296 | } | |
1297 | ||
1298 | /* Try to fix a correctable error by pushing the line out from | |
1299 | * the E-cache. Recheck error reporting registers to see if the | |
1300 | * problem is intermittent. | |
1301 | */ | |
1302 | static int cheetah_fix_ce(unsigned long physaddr) | |
1303 | { | |
1304 | unsigned long orig_estate; | |
1305 | unsigned long alias1, alias2; | |
1306 | int ret; | |
1307 | ||
1308 | /* Make sure correctable error traps are disabled. */ | |
1309 | __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t" | |
1310 | "andn %0, %1, %%g1\n\t" | |
1311 | "stxa %%g1, [%%g0] %2\n\t" | |
1312 | "membar #Sync" | |
1313 | : "=&r" (orig_estate) | |
1314 | : "i" (ESTATE_ERROR_CEEN), | |
1315 | "i" (ASI_ESTATE_ERROR_EN) | |
1316 | : "g1"); | |
1317 | ||
1318 | /* We calculate alias addresses that will force the | |
1319 | * cache line in question out of the E-cache. Then | |
1320 | * we bring it back in with an atomic instruction so | |
1321 | * that we get it in some modified/exclusive state, | |
1322 | * then we displace it again to try and get proper ECC | |
1323 | * pushed back into the system. | |
1324 | */ | |
1325 | physaddr &= ~(8UL - 1UL); | |
1326 | alias1 = (ecache_flush_physbase + | |
1327 | (physaddr & ((ecache_flush_size >> 1) - 1))); | |
1328 | alias2 = alias1 + (ecache_flush_size >> 1); | |
1329 | __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t" | |
1330 | "ldxa [%1] %3, %%g0\n\t" | |
1331 | "casxa [%2] %3, %%g0, %%g0\n\t" | |
1332 | "membar #StoreLoad | #StoreStore\n\t" | |
1333 | "ldxa [%0] %3, %%g0\n\t" | |
1334 | "ldxa [%1] %3, %%g0\n\t" | |
1335 | "membar #Sync" | |
1336 | : /* no outputs */ | |
1337 | : "r" (alias1), "r" (alias2), | |
1338 | "r" (physaddr), "i" (ASI_PHYS_USE_EC)); | |
1339 | ||
1340 | /* Did that trigger another error? */ | |
1341 | if (cheetah_recheck_errors(NULL)) { | |
1342 | /* Try one more time. */ | |
1343 | __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t" | |
1344 | "membar #Sync" | |
1345 | : : "r" (physaddr), "i" (ASI_PHYS_USE_EC)); | |
1346 | if (cheetah_recheck_errors(NULL)) | |
1347 | ret = 2; | |
1348 | else | |
1349 | ret = 1; | |
1350 | } else { | |
1351 | /* No new error, intermittent problem. */ | |
1352 | ret = 0; | |
1353 | } | |
1354 | ||
1355 | /* Restore error enables. */ | |
1356 | __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" | |
1357 | "membar #Sync" | |
1358 | : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN)); | |
1359 | ||
1360 | return ret; | |
1361 | } | |
1362 | ||
1363 | /* Return non-zero if PADDR is a valid physical memory address. */ | |
1364 | static int cheetah_check_main_memory(unsigned long paddr) | |
1365 | { | |
10147570 | 1366 | unsigned long vaddr = PAGE_OFFSET + paddr; |
1da177e4 | 1367 | |
13edad7a | 1368 | if (vaddr > (unsigned long) high_memory) |
ed3ffaf7 DM |
1369 | return 0; |
1370 | ||
10147570 | 1371 | return kern_addr_valid(vaddr); |
1da177e4 LT |
1372 | } |
1373 | ||
1374 | void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar) | |
1375 | { | |
1376 | struct cheetah_err_info local_snapshot, *p; | |
1377 | int recoverable, is_memory; | |
1378 | ||
1379 | p = cheetah_get_error_log(afsr); | |
1380 | if (!p) { | |
1381 | prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n", | |
1382 | afsr, afar); | |
1383 | prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n", | |
1384 | smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate); | |
1385 | prom_halt(); | |
1386 | } | |
1387 | ||
1388 | /* Grab snapshot of logged error. */ | |
1389 | memcpy(&local_snapshot, p, sizeof(local_snapshot)); | |
1390 | ||
1391 | /* If the current trap snapshot does not match what the | |
1392 | * trap handler passed along into our args, big trouble. | |
1393 | * In such a case, mark the local copy as invalid. | |
1394 | * | |
1395 | * Else, it matches and we mark the afsr in the non-local | |
1396 | * copy as invalid so we may log new error traps there. | |
1397 | */ | |
1398 | if (p->afsr != afsr || p->afar != afar) | |
1399 | local_snapshot.afsr = CHAFSR_INVALID; | |
1400 | else | |
1401 | p->afsr = CHAFSR_INVALID; | |
1402 | ||
1403 | is_memory = cheetah_check_main_memory(afar); | |
1404 | ||
1405 | if (is_memory && (afsr & CHAFSR_CE) != 0UL) { | |
1406 | /* XXX Might want to log the results of this operation | |
1407 | * XXX somewhere... -DaveM | |
1408 | */ | |
1409 | cheetah_fix_ce(afar); | |
1410 | } | |
1411 | ||
1412 | { | |
1413 | int flush_all, flush_line; | |
1414 | ||
1415 | flush_all = flush_line = 0; | |
1416 | if ((afsr & CHAFSR_EDC) != 0UL) { | |
1417 | if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC) | |
1418 | flush_line = 1; | |
1419 | else | |
1420 | flush_all = 1; | |
1421 | } else if ((afsr & CHAFSR_CPC) != 0UL) { | |
1422 | if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC) | |
1423 | flush_line = 1; | |
1424 | else | |
1425 | flush_all = 1; | |
1426 | } | |
1427 | ||
1428 | /* Trap handler only disabled I-cache, flush it. */ | |
1429 | cheetah_flush_icache(); | |
1430 | ||
1431 | /* Re-enable I-cache */ | |
1432 | __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" | |
1433 | "or %%g1, %1, %%g1\n\t" | |
1434 | "stxa %%g1, [%%g0] %0\n\t" | |
1435 | "membar #Sync" | |
1436 | : /* no outputs */ | |
1437 | : "i" (ASI_DCU_CONTROL_REG), | |
1438 | "i" (DCU_IC) | |
1439 | : "g1"); | |
1440 | ||
1441 | if (flush_all) | |
1442 | cheetah_flush_ecache(); | |
1443 | else if (flush_line) | |
1444 | cheetah_flush_ecache_line(afar); | |
1445 | } | |
1446 | ||
1447 | /* Re-enable error reporting */ | |
1448 | __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" | |
1449 | "or %%g1, %1, %%g1\n\t" | |
1450 | "stxa %%g1, [%%g0] %0\n\t" | |
1451 | "membar #Sync" | |
1452 | : /* no outputs */ | |
1453 | : "i" (ASI_ESTATE_ERROR_EN), | |
1454 | "i" (ESTATE_ERROR_CEEN) | |
1455 | : "g1"); | |
1456 | ||
1457 | /* Decide if we can continue after handling this trap and | |
1458 | * logging the error. | |
1459 | */ | |
1460 | recoverable = 1; | |
1461 | if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP)) | |
1462 | recoverable = 0; | |
1463 | ||
1464 | /* Re-check AFSR/AFAR */ | |
1465 | (void) cheetah_recheck_errors(&local_snapshot); | |
1466 | ||
1467 | /* Log errors. */ | |
1468 | cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable); | |
1469 | ||
1470 | if (!recoverable) | |
1471 | panic("Irrecoverable Correctable-ECC error trap.\n"); | |
1472 | } | |
1473 | ||
1474 | void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar) | |
1475 | { | |
1476 | struct cheetah_err_info local_snapshot, *p; | |
1477 | int recoverable, is_memory; | |
1478 | ||
1479 | #ifdef CONFIG_PCI | |
1480 | /* Check for the special PCI poke sequence. */ | |
1481 | if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) { | |
1482 | cheetah_flush_icache(); | |
1483 | cheetah_flush_dcache(); | |
1484 | ||
1485 | /* Re-enable I-cache/D-cache */ | |
1486 | __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" | |
1487 | "or %%g1, %1, %%g1\n\t" | |
1488 | "stxa %%g1, [%%g0] %0\n\t" | |
1489 | "membar #Sync" | |
1490 | : /* no outputs */ | |
1491 | : "i" (ASI_DCU_CONTROL_REG), | |
1492 | "i" (DCU_DC | DCU_IC) | |
1493 | : "g1"); | |
1494 | ||
1495 | /* Re-enable error reporting */ | |
1496 | __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" | |
1497 | "or %%g1, %1, %%g1\n\t" | |
1498 | "stxa %%g1, [%%g0] %0\n\t" | |
1499 | "membar #Sync" | |
1500 | : /* no outputs */ | |
1501 | : "i" (ASI_ESTATE_ERROR_EN), | |
1502 | "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN) | |
1503 | : "g1"); | |
1504 | ||
1505 | (void) cheetah_recheck_errors(NULL); | |
1506 | ||
1507 | pci_poke_faulted = 1; | |
1508 | regs->tpc += 4; | |
1509 | regs->tnpc = regs->tpc + 4; | |
1510 | return; | |
1511 | } | |
1512 | #endif | |
1513 | ||
1514 | p = cheetah_get_error_log(afsr); | |
1515 | if (!p) { | |
1516 | prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n", | |
1517 | afsr, afar); | |
1518 | prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n", | |
1519 | smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate); | |
1520 | prom_halt(); | |
1521 | } | |
1522 | ||
1523 | /* Grab snapshot of logged error. */ | |
1524 | memcpy(&local_snapshot, p, sizeof(local_snapshot)); | |
1525 | ||
1526 | /* If the current trap snapshot does not match what the | |
1527 | * trap handler passed along into our args, big trouble. | |
1528 | * In such a case, mark the local copy as invalid. | |
1529 | * | |
1530 | * Else, it matches and we mark the afsr in the non-local | |
1531 | * copy as invalid so we may log new error traps there. | |
1532 | */ | |
1533 | if (p->afsr != afsr || p->afar != afar) | |
1534 | local_snapshot.afsr = CHAFSR_INVALID; | |
1535 | else | |
1536 | p->afsr = CHAFSR_INVALID; | |
1537 | ||
1538 | is_memory = cheetah_check_main_memory(afar); | |
1539 | ||
1540 | { | |
1541 | int flush_all, flush_line; | |
1542 | ||
1543 | flush_all = flush_line = 0; | |
1544 | if ((afsr & CHAFSR_EDU) != 0UL) { | |
1545 | if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU) | |
1546 | flush_line = 1; | |
1547 | else | |
1548 | flush_all = 1; | |
1549 | } else if ((afsr & CHAFSR_BERR) != 0UL) { | |
1550 | if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR) | |
1551 | flush_line = 1; | |
1552 | else | |
1553 | flush_all = 1; | |
1554 | } | |
1555 | ||
1556 | cheetah_flush_icache(); | |
1557 | cheetah_flush_dcache(); | |
1558 | ||
1559 | /* Re-enable I/D caches */ | |
1560 | __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" | |
1561 | "or %%g1, %1, %%g1\n\t" | |
1562 | "stxa %%g1, [%%g0] %0\n\t" | |
1563 | "membar #Sync" | |
1564 | : /* no outputs */ | |
1565 | : "i" (ASI_DCU_CONTROL_REG), | |
1566 | "i" (DCU_IC | DCU_DC) | |
1567 | : "g1"); | |
1568 | ||
1569 | if (flush_all) | |
1570 | cheetah_flush_ecache(); | |
1571 | else if (flush_line) | |
1572 | cheetah_flush_ecache_line(afar); | |
1573 | } | |
1574 | ||
1575 | /* Re-enable error reporting */ | |
1576 | __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" | |
1577 | "or %%g1, %1, %%g1\n\t" | |
1578 | "stxa %%g1, [%%g0] %0\n\t" | |
1579 | "membar #Sync" | |
1580 | : /* no outputs */ | |
1581 | : "i" (ASI_ESTATE_ERROR_EN), | |
1582 | "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN) | |
1583 | : "g1"); | |
1584 | ||
1585 | /* Decide if we can continue after handling this trap and | |
1586 | * logging the error. | |
1587 | */ | |
1588 | recoverable = 1; | |
1589 | if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP)) | |
1590 | recoverable = 0; | |
1591 | ||
1592 | /* Re-check AFSR/AFAR. What we are looking for here is whether a new | |
1593 | * error was logged while we had error reporting traps disabled. | |
1594 | */ | |
1595 | if (cheetah_recheck_errors(&local_snapshot)) { | |
1596 | unsigned long new_afsr = local_snapshot.afsr; | |
1597 | ||
1598 | /* If we got a new asynchronous error, die... */ | |
1599 | if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU | | |
1600 | CHAFSR_WDU | CHAFSR_CPU | | |
1601 | CHAFSR_IVU | CHAFSR_UE | | |
1602 | CHAFSR_BERR | CHAFSR_TO)) | |
1603 | recoverable = 0; | |
1604 | } | |
1605 | ||
1606 | /* Log errors. */ | |
1607 | cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable); | |
1608 | ||
1609 | /* "Recoverable" here means we try to yank the page from ever | |
1610 | * being newly used again. This depends upon a few things: | |
1611 | * 1) Must be main memory, and AFAR must be valid. | |
1612 | * 2) If we trapped from user, OK. | |
1613 | * 3) Else, if we trapped from kernel we must find exception | |
1614 | * table entry (ie. we have to have been accessing user | |
1615 | * space). | |
1616 | * | |
1617 | * If AFAR is not in main memory, or we trapped from kernel | |
1618 | * and cannot find an exception table entry, it is unacceptable | |
1619 | * to try and continue. | |
1620 | */ | |
1621 | if (recoverable && is_memory) { | |
1622 | if ((regs->tstate & TSTATE_PRIV) == 0UL) { | |
1623 | /* OK, usermode access. */ | |
1624 | recoverable = 1; | |
1625 | } else { | |
8cf14af0 | 1626 | const struct exception_table_entry *entry; |
1da177e4 | 1627 | |
8cf14af0 DM |
1628 | entry = search_exception_tables(regs->tpc); |
1629 | if (entry) { | |
1da177e4 LT |
1630 | /* OK, kernel access to userspace. */ |
1631 | recoverable = 1; | |
1632 | ||
1633 | } else { | |
1634 | /* BAD, privileged state is corrupted. */ | |
1635 | recoverable = 0; | |
1636 | } | |
1637 | ||
1638 | if (recoverable) { | |
1639 | if (pfn_valid(afar >> PAGE_SHIFT)) | |
1640 | get_page(pfn_to_page(afar >> PAGE_SHIFT)); | |
1641 | else | |
1642 | recoverable = 0; | |
1643 | ||
1644 | /* Only perform fixup if we still have a | |
1645 | * recoverable condition. | |
1646 | */ | |
1647 | if (recoverable) { | |
8cf14af0 | 1648 | regs->tpc = entry->fixup; |
1da177e4 | 1649 | regs->tnpc = regs->tpc + 4; |
1da177e4 LT |
1650 | } |
1651 | } | |
1652 | } | |
1653 | } else { | |
1654 | recoverable = 0; | |
1655 | } | |
1656 | ||
1657 | if (!recoverable) | |
1658 | panic("Irrecoverable deferred error trap.\n"); | |
1659 | } | |
1660 | ||
1661 | /* Handle a D/I cache parity error trap. TYPE is encoded as: | |
1662 | * | |
1663 | * Bit0: 0=dcache,1=icache | |
1664 | * Bit1: 0=recoverable,1=unrecoverable | |
1665 | * | |
1666 | * The hardware has disabled both the I-cache and D-cache in | |
1667 | * the %dcr register. | |
1668 | */ | |
1669 | void cheetah_plus_parity_error(int type, struct pt_regs *regs) | |
1670 | { | |
1671 | if (type & 0x1) | |
1672 | __cheetah_flush_icache(); | |
1673 | else | |
1674 | cheetah_plus_zap_dcache_parity(); | |
1675 | cheetah_flush_dcache(); | |
1676 | ||
1677 | /* Re-enable I-cache/D-cache */ | |
1678 | __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" | |
1679 | "or %%g1, %1, %%g1\n\t" | |
1680 | "stxa %%g1, [%%g0] %0\n\t" | |
1681 | "membar #Sync" | |
1682 | : /* no outputs */ | |
1683 | : "i" (ASI_DCU_CONTROL_REG), | |
1684 | "i" (DCU_DC | DCU_IC) | |
1685 | : "g1"); | |
1686 | ||
1687 | if (type & 0x2) { | |
1688 | printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n", | |
1689 | smp_processor_id(), | |
1690 | (type & 0x1) ? 'I' : 'D', | |
1691 | regs->tpc); | |
5af47db7 | 1692 | print_symbol(KERN_EMERG "TPC<%s>\n", regs->tpc); |
1da177e4 LT |
1693 | panic("Irrecoverable Cheetah+ parity error."); |
1694 | } | |
1695 | ||
1696 | printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n", | |
1697 | smp_processor_id(), | |
1698 | (type & 0x1) ? 'I' : 'D', | |
1699 | regs->tpc); | |
5af47db7 | 1700 | print_symbol(KERN_WARNING "TPC<%s>\n", regs->tpc); |
1da177e4 LT |
1701 | } |
1702 | ||
5b0c0572 DM |
1703 | struct sun4v_error_entry { |
1704 | u64 err_handle; | |
1705 | u64 err_stick; | |
1706 | ||
1707 | u32 err_type; | |
1708 | #define SUN4V_ERR_TYPE_UNDEFINED 0 | |
1709 | #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1 | |
1710 | #define SUN4V_ERR_TYPE_PRECISE_NONRES 2 | |
1711 | #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3 | |
1712 | #define SUN4V_ERR_TYPE_WARNING_RES 4 | |
1713 | ||
1714 | u32 err_attrs; | |
1715 | #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001 | |
1716 | #define SUN4V_ERR_ATTRS_MEMORY 0x00000002 | |
1717 | #define SUN4V_ERR_ATTRS_PIO 0x00000004 | |
1718 | #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008 | |
1719 | #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010 | |
1720 | #define SUN4V_ERR_ATTRS_USER_MODE 0x01000000 | |
1721 | #define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000 | |
1722 | #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000 | |
1723 | ||
1724 | u64 err_raddr; | |
1725 | u32 err_size; | |
1726 | u16 err_cpu; | |
1727 | u16 err_pad; | |
1728 | }; | |
1729 | ||
1730 | static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0); | |
1731 | static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0); | |
1732 | ||
1733 | static const char *sun4v_err_type_to_str(u32 type) | |
1734 | { | |
1735 | switch (type) { | |
1736 | case SUN4V_ERR_TYPE_UNDEFINED: | |
1737 | return "undefined"; | |
1738 | case SUN4V_ERR_TYPE_UNCORRECTED_RES: | |
1739 | return "uncorrected resumable"; | |
1740 | case SUN4V_ERR_TYPE_PRECISE_NONRES: | |
1741 | return "precise nonresumable"; | |
1742 | case SUN4V_ERR_TYPE_DEFERRED_NONRES: | |
1743 | return "deferred nonresumable"; | |
1744 | case SUN4V_ERR_TYPE_WARNING_RES: | |
1745 | return "warning resumable"; | |
1746 | default: | |
1747 | return "unknown"; | |
1748 | }; | |
1749 | } | |
1750 | ||
5224e6cc | 1751 | static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt) |
5b0c0572 DM |
1752 | { |
1753 | int cnt; | |
1754 | ||
1755 | printk("%s: Reporting on cpu %d\n", pfx, cpu); | |
1756 | printk("%s: err_handle[%lx] err_stick[%lx] err_type[%08x:%s]\n", | |
1757 | pfx, | |
1758 | ent->err_handle, ent->err_stick, | |
1759 | ent->err_type, | |
1760 | sun4v_err_type_to_str(ent->err_type)); | |
1761 | printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n", | |
1762 | pfx, | |
1763 | ent->err_attrs, | |
1764 | ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ? | |
1765 | "processor" : ""), | |
1766 | ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ? | |
1767 | "memory" : ""), | |
1768 | ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ? | |
1769 | "pio" : ""), | |
1770 | ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ? | |
1771 | "integer-regs" : ""), | |
1772 | ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ? | |
1773 | "fpu-regs" : ""), | |
1774 | ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ? | |
1775 | "user" : ""), | |
1776 | ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ? | |
1777 | "privileged" : ""), | |
1778 | ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ? | |
1779 | "queue-full" : "")); | |
1780 | printk("%s: err_raddr[%016lx] err_size[%u] err_cpu[%u]\n", | |
1781 | pfx, | |
1782 | ent->err_raddr, ent->err_size, ent->err_cpu); | |
1783 | ||
5224e6cc DM |
1784 | __show_regs(regs); |
1785 | ||
5b0c0572 DM |
1786 | if ((cnt = atomic_read(ocnt)) != 0) { |
1787 | atomic_set(ocnt, 0); | |
1788 | wmb(); | |
1789 | printk("%s: Queue overflowed %d times.\n", | |
1790 | pfx, cnt); | |
1791 | } | |
1792 | } | |
1793 | ||
1794 | /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate. | |
1795 | * Log the event and clear the first word of the entry. | |
1796 | */ | |
1797 | void sun4v_resum_error(struct pt_regs *regs, unsigned long offset) | |
1798 | { | |
1799 | struct sun4v_error_entry *ent, local_copy; | |
1800 | struct trap_per_cpu *tb; | |
1801 | unsigned long paddr; | |
1802 | int cpu; | |
1803 | ||
1804 | cpu = get_cpu(); | |
1805 | ||
1806 | tb = &trap_block[cpu]; | |
1807 | paddr = tb->resum_kernel_buf_pa + offset; | |
1808 | ent = __va(paddr); | |
1809 | ||
1810 | memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry)); | |
1811 | ||
1812 | /* We have a local copy now, so release the entry. */ | |
1813 | ent->err_handle = 0; | |
1814 | wmb(); | |
1815 | ||
1816 | put_cpu(); | |
1817 | ||
a2c1e064 DM |
1818 | if (ent->err_type == SUN4V_ERR_TYPE_WARNING_RES) { |
1819 | /* If err_type is 0x4, it's a powerdown request. Do | |
1820 | * not do the usual resumable error log because that | |
1821 | * makes it look like some abnormal error. | |
1822 | */ | |
1823 | printk(KERN_INFO "Power down request...\n"); | |
1824 | kill_cad_pid(SIGINT, 1); | |
1825 | return; | |
1826 | } | |
1827 | ||
5224e6cc | 1828 | sun4v_log_error(regs, &local_copy, cpu, |
5b0c0572 DM |
1829 | KERN_ERR "RESUMABLE ERROR", |
1830 | &sun4v_resum_oflow_cnt); | |
1831 | } | |
1832 | ||
1833 | /* If we try to printk() we'll probably make matters worse, by trying | |
1834 | * to retake locks this cpu already holds or causing more errors. So | |
1835 | * just bump a counter, and we'll report these counter bumps above. | |
1836 | */ | |
1837 | void sun4v_resum_overflow(struct pt_regs *regs) | |
1838 | { | |
1839 | atomic_inc(&sun4v_resum_oflow_cnt); | |
1840 | } | |
1841 | ||
1842 | /* We run with %pil set to 15 and PSTATE_IE enabled in %pstate. | |
1843 | * Log the event, clear the first word of the entry, and die. | |
1844 | */ | |
1845 | void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset) | |
1846 | { | |
1847 | struct sun4v_error_entry *ent, local_copy; | |
1848 | struct trap_per_cpu *tb; | |
1849 | unsigned long paddr; | |
1850 | int cpu; | |
1851 | ||
1852 | cpu = get_cpu(); | |
1853 | ||
1854 | tb = &trap_block[cpu]; | |
1855 | paddr = tb->nonresum_kernel_buf_pa + offset; | |
1856 | ent = __va(paddr); | |
1857 | ||
1858 | memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry)); | |
1859 | ||
1860 | /* We have a local copy now, so release the entry. */ | |
1861 | ent->err_handle = 0; | |
1862 | wmb(); | |
1863 | ||
1864 | put_cpu(); | |
1865 | ||
1866 | #ifdef CONFIG_PCI | |
1867 | /* Check for the special PCI poke sequence. */ | |
1868 | if (pci_poke_in_progress && pci_poke_cpu == cpu) { | |
1869 | pci_poke_faulted = 1; | |
1870 | regs->tpc += 4; | |
1871 | regs->tnpc = regs->tpc + 4; | |
1872 | return; | |
1873 | } | |
1874 | #endif | |
1875 | ||
5224e6cc | 1876 | sun4v_log_error(regs, &local_copy, cpu, |
5b0c0572 DM |
1877 | KERN_EMERG "NON-RESUMABLE ERROR", |
1878 | &sun4v_nonresum_oflow_cnt); | |
1879 | ||
1880 | panic("Non-resumable error."); | |
1881 | } | |
1882 | ||
1883 | /* If we try to printk() we'll probably make matters worse, by trying | |
1884 | * to retake locks this cpu already holds or causing more errors. So | |
1885 | * just bump a counter, and we'll report these counter bumps above. | |
1886 | */ | |
1887 | void sun4v_nonresum_overflow(struct pt_regs *regs) | |
1888 | { | |
1889 | /* XXX Actually even this can make not that much sense. Perhaps | |
1890 | * XXX we should just pull the plug and panic directly from here? | |
1891 | */ | |
1892 | atomic_inc(&sun4v_nonresum_oflow_cnt); | |
1893 | } | |
1894 | ||
6c8927c9 DM |
1895 | unsigned long sun4v_err_itlb_vaddr; |
1896 | unsigned long sun4v_err_itlb_ctx; | |
1897 | unsigned long sun4v_err_itlb_pte; | |
1898 | unsigned long sun4v_err_itlb_error; | |
1899 | ||
1900 | void sun4v_itlb_error_report(struct pt_regs *regs, int tl) | |
1901 | { | |
1902 | if (tl > 1) | |
1903 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
1904 | ||
04d74758 DM |
1905 | printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n", |
1906 | regs->tpc, tl); | |
5af47db7 | 1907 | print_symbol(KERN_EMERG "SUN4V-ITLB: TPC<%s>\n", regs->tpc); |
6320bceb DM |
1908 | printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]); |
1909 | print_symbol(KERN_EMERG "SUN4V-ITLB: O7<%s>\n", regs->u_regs[UREG_I7]); | |
04d74758 DM |
1910 | printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] " |
1911 | "pte[%lx] error[%lx]\n", | |
6c8927c9 DM |
1912 | sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx, |
1913 | sun4v_err_itlb_pte, sun4v_err_itlb_error); | |
04d74758 | 1914 | |
6c8927c9 DM |
1915 | prom_halt(); |
1916 | } | |
1917 | ||
1918 | unsigned long sun4v_err_dtlb_vaddr; | |
1919 | unsigned long sun4v_err_dtlb_ctx; | |
1920 | unsigned long sun4v_err_dtlb_pte; | |
1921 | unsigned long sun4v_err_dtlb_error; | |
1922 | ||
1923 | void sun4v_dtlb_error_report(struct pt_regs *regs, int tl) | |
1924 | { | |
1925 | if (tl > 1) | |
1926 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
1927 | ||
04d74758 DM |
1928 | printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n", |
1929 | regs->tpc, tl); | |
5af47db7 | 1930 | print_symbol(KERN_EMERG "SUN4V-DTLB: TPC<%s>\n", regs->tpc); |
6320bceb DM |
1931 | printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]); |
1932 | print_symbol(KERN_EMERG "SUN4V-DTLB: O7<%s>\n", regs->u_regs[UREG_I7]); | |
04d74758 DM |
1933 | printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] " |
1934 | "pte[%lx] error[%lx]\n", | |
6c8927c9 DM |
1935 | sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx, |
1936 | sun4v_err_dtlb_pte, sun4v_err_dtlb_error); | |
04d74758 | 1937 | |
6c8927c9 DM |
1938 | prom_halt(); |
1939 | } | |
1940 | ||
2a3a5f5d DM |
1941 | void hypervisor_tlbop_error(unsigned long err, unsigned long op) |
1942 | { | |
1943 | printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n", | |
1944 | err, op); | |
1945 | } | |
1946 | ||
1947 | void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op) | |
1948 | { | |
1949 | printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n", | |
1950 | err, op); | |
1951 | } | |
1952 | ||
1da177e4 LT |
1953 | void do_fpe_common(struct pt_regs *regs) |
1954 | { | |
1955 | if (regs->tstate & TSTATE_PRIV) { | |
1956 | regs->tpc = regs->tnpc; | |
1957 | regs->tnpc += 4; | |
1958 | } else { | |
1959 | unsigned long fsr = current_thread_info()->xfsr[0]; | |
1960 | siginfo_t info; | |
1961 | ||
1962 | if (test_thread_flag(TIF_32BIT)) { | |
1963 | regs->tpc &= 0xffffffff; | |
1964 | regs->tnpc &= 0xffffffff; | |
1965 | } | |
1966 | info.si_signo = SIGFPE; | |
1967 | info.si_errno = 0; | |
1968 | info.si_addr = (void __user *)regs->tpc; | |
1969 | info.si_trapno = 0; | |
1970 | info.si_code = __SI_FAULT; | |
1971 | if ((fsr & 0x1c000) == (1 << 14)) { | |
1972 | if (fsr & 0x10) | |
1973 | info.si_code = FPE_FLTINV; | |
1974 | else if (fsr & 0x08) | |
1975 | info.si_code = FPE_FLTOVF; | |
1976 | else if (fsr & 0x04) | |
1977 | info.si_code = FPE_FLTUND; | |
1978 | else if (fsr & 0x02) | |
1979 | info.si_code = FPE_FLTDIV; | |
1980 | else if (fsr & 0x01) | |
1981 | info.si_code = FPE_FLTRES; | |
1982 | } | |
1983 | force_sig_info(SIGFPE, &info, current); | |
1984 | } | |
1985 | } | |
1986 | ||
1987 | void do_fpieee(struct pt_regs *regs) | |
1988 | { | |
1989 | if (notify_die(DIE_TRAP, "fpu exception ieee", regs, | |
1990 | 0, 0x24, SIGFPE) == NOTIFY_STOP) | |
1991 | return; | |
1992 | ||
1993 | do_fpe_common(regs); | |
1994 | } | |
1995 | ||
1996 | extern int do_mathemu(struct pt_regs *, struct fpustate *); | |
1997 | ||
1998 | void do_fpother(struct pt_regs *regs) | |
1999 | { | |
2000 | struct fpustate *f = FPUSTATE; | |
2001 | int ret = 0; | |
2002 | ||
2003 | if (notify_die(DIE_TRAP, "fpu exception other", regs, | |
2004 | 0, 0x25, SIGFPE) == NOTIFY_STOP) | |
2005 | return; | |
2006 | ||
2007 | switch ((current_thread_info()->xfsr[0] & 0x1c000)) { | |
2008 | case (2 << 14): /* unfinished_FPop */ | |
2009 | case (3 << 14): /* unimplemented_FPop */ | |
2010 | ret = do_mathemu(regs, f); | |
2011 | break; | |
2012 | } | |
2013 | if (ret) | |
2014 | return; | |
2015 | do_fpe_common(regs); | |
2016 | } | |
2017 | ||
2018 | void do_tof(struct pt_regs *regs) | |
2019 | { | |
2020 | siginfo_t info; | |
2021 | ||
2022 | if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs, | |
2023 | 0, 0x26, SIGEMT) == NOTIFY_STOP) | |
2024 | return; | |
2025 | ||
2026 | if (regs->tstate & TSTATE_PRIV) | |
2027 | die_if_kernel("Penguin overflow trap from kernel mode", regs); | |
2028 | if (test_thread_flag(TIF_32BIT)) { | |
2029 | regs->tpc &= 0xffffffff; | |
2030 | regs->tnpc &= 0xffffffff; | |
2031 | } | |
2032 | info.si_signo = SIGEMT; | |
2033 | info.si_errno = 0; | |
2034 | info.si_code = EMT_TAGOVF; | |
2035 | info.si_addr = (void __user *)regs->tpc; | |
2036 | info.si_trapno = 0; | |
2037 | force_sig_info(SIGEMT, &info, current); | |
2038 | } | |
2039 | ||
2040 | void do_div0(struct pt_regs *regs) | |
2041 | { | |
2042 | siginfo_t info; | |
2043 | ||
2044 | if (notify_die(DIE_TRAP, "integer division by zero", regs, | |
2045 | 0, 0x28, SIGFPE) == NOTIFY_STOP) | |
2046 | return; | |
2047 | ||
2048 | if (regs->tstate & TSTATE_PRIV) | |
2049 | die_if_kernel("TL0: Kernel divide by zero.", regs); | |
2050 | if (test_thread_flag(TIF_32BIT)) { | |
2051 | regs->tpc &= 0xffffffff; | |
2052 | regs->tnpc &= 0xffffffff; | |
2053 | } | |
2054 | info.si_signo = SIGFPE; | |
2055 | info.si_errno = 0; | |
2056 | info.si_code = FPE_INTDIV; | |
2057 | info.si_addr = (void __user *)regs->tpc; | |
2058 | info.si_trapno = 0; | |
2059 | force_sig_info(SIGFPE, &info, current); | |
2060 | } | |
2061 | ||
99cd2201 | 2062 | static void instruction_dump(unsigned int *pc) |
1da177e4 LT |
2063 | { |
2064 | int i; | |
2065 | ||
2066 | if ((((unsigned long) pc) & 3)) | |
2067 | return; | |
2068 | ||
2069 | printk("Instruction DUMP:"); | |
2070 | for (i = -3; i < 6; i++) | |
2071 | printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>'); | |
2072 | printk("\n"); | |
2073 | } | |
2074 | ||
99cd2201 | 2075 | static void user_instruction_dump(unsigned int __user *pc) |
1da177e4 LT |
2076 | { |
2077 | int i; | |
2078 | unsigned int buf[9]; | |
2079 | ||
2080 | if ((((unsigned long) pc) & 3)) | |
2081 | return; | |
2082 | ||
2083 | if (copy_from_user(buf, pc - 3, sizeof(buf))) | |
2084 | return; | |
2085 | ||
2086 | printk("Instruction DUMP:"); | |
2087 | for (i = 0; i < 9; i++) | |
2088 | printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>'); | |
2089 | printk("\n"); | |
2090 | } | |
2091 | ||
2092 | void show_stack(struct task_struct *tsk, unsigned long *_ksp) | |
2093 | { | |
2094 | unsigned long pc, fp, thread_base, ksp; | |
c1f193a7 | 2095 | struct thread_info *tp; |
1da177e4 LT |
2096 | struct reg_window *rw; |
2097 | int count = 0; | |
2098 | ||
2099 | ksp = (unsigned long) _ksp; | |
c1f193a7 DM |
2100 | if (!tsk) |
2101 | tsk = current; | |
2102 | tp = task_thread_info(tsk); | |
2103 | if (ksp == 0UL) { | |
2104 | if (tsk == current) | |
2105 | asm("mov %%fp, %0" : "=r" (ksp)); | |
2106 | else | |
2107 | ksp = tp->ksp; | |
2108 | } | |
1da177e4 LT |
2109 | if (tp == current_thread_info()) |
2110 | flushw_all(); | |
2111 | ||
2112 | fp = ksp + STACK_BIAS; | |
2113 | thread_base = (unsigned long) tp; | |
2114 | ||
2115 | printk("Call Trace:"); | |
2116 | #ifdef CONFIG_KALLSYMS | |
2117 | printk("\n"); | |
2118 | #endif | |
2119 | do { | |
2120 | /* Bogus frame pointer? */ | |
2121 | if (fp < (thread_base + sizeof(struct thread_info)) || | |
2122 | fp >= (thread_base + THREAD_SIZE)) | |
2123 | break; | |
2124 | rw = (struct reg_window *)fp; | |
2125 | pc = rw->ins[7]; | |
2126 | printk(" [%016lx] ", pc); | |
2127 | print_symbol("%s\n", pc); | |
2128 | fp = rw->ins[6] + STACK_BIAS; | |
2129 | } while (++count < 16); | |
2130 | #ifndef CONFIG_KALLSYMS | |
2131 | printk("\n"); | |
2132 | #endif | |
2133 | } | |
2134 | ||
2135 | void dump_stack(void) | |
2136 | { | |
c1f193a7 | 2137 | show_stack(current, NULL); |
1da177e4 LT |
2138 | } |
2139 | ||
2140 | EXPORT_SYMBOL(dump_stack); | |
2141 | ||
2142 | static inline int is_kernel_stack(struct task_struct *task, | |
2143 | struct reg_window *rw) | |
2144 | { | |
2145 | unsigned long rw_addr = (unsigned long) rw; | |
2146 | unsigned long thread_base, thread_end; | |
2147 | ||
2148 | if (rw_addr < PAGE_OFFSET) { | |
2149 | if (task != &init_task) | |
2150 | return 0; | |
2151 | } | |
2152 | ||
ee3eea16 | 2153 | thread_base = (unsigned long) task_stack_page(task); |
1da177e4 LT |
2154 | thread_end = thread_base + sizeof(union thread_union); |
2155 | if (rw_addr >= thread_base && | |
2156 | rw_addr < thread_end && | |
2157 | !(rw_addr & 0x7UL)) | |
2158 | return 1; | |
2159 | ||
2160 | return 0; | |
2161 | } | |
2162 | ||
2163 | static inline struct reg_window *kernel_stack_up(struct reg_window *rw) | |
2164 | { | |
2165 | unsigned long fp = rw->ins[6]; | |
2166 | ||
2167 | if (!fp) | |
2168 | return NULL; | |
2169 | ||
2170 | return (struct reg_window *) (fp + STACK_BIAS); | |
2171 | } | |
2172 | ||
2173 | void die_if_kernel(char *str, struct pt_regs *regs) | |
2174 | { | |
2175 | static int die_counter; | |
1da177e4 LT |
2176 | extern void smp_report_regs(void); |
2177 | int count = 0; | |
2178 | ||
2179 | /* Amuse the user. */ | |
2180 | printk( | |
2181 | " \\|/ ____ \\|/\n" | |
2182 | " \"@'/ .. \\`@\"\n" | |
2183 | " /_| \\__/ |_\\\n" | |
2184 | " \\__U_/\n"); | |
2185 | ||
19c5870c | 2186 | printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter); |
1da177e4 LT |
2187 | notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV); |
2188 | __asm__ __volatile__("flushw"); | |
2189 | __show_regs(regs); | |
bcdcd8e7 | 2190 | add_taint(TAINT_DIE); |
1da177e4 LT |
2191 | if (regs->tstate & TSTATE_PRIV) { |
2192 | struct reg_window *rw = (struct reg_window *) | |
2193 | (regs->u_regs[UREG_FP] + STACK_BIAS); | |
2194 | ||
2195 | /* Stop the back trace when we hit userland or we | |
2196 | * find some badly aligned kernel stack. | |
2197 | */ | |
2198 | while (rw && | |
2199 | count++ < 30&& | |
2200 | is_kernel_stack(current, rw)) { | |
2201 | printk("Caller[%016lx]", rw->ins[7]); | |
2202 | print_symbol(": %s", rw->ins[7]); | |
2203 | printk("\n"); | |
2204 | ||
2205 | rw = kernel_stack_up(rw); | |
2206 | } | |
2207 | instruction_dump ((unsigned int *) regs->tpc); | |
2208 | } else { | |
2209 | if (test_thread_flag(TIF_32BIT)) { | |
2210 | regs->tpc &= 0xffffffff; | |
2211 | regs->tnpc &= 0xffffffff; | |
2212 | } | |
2213 | user_instruction_dump ((unsigned int __user *) regs->tpc); | |
2214 | } | |
37133c00 | 2215 | #if 0 |
1da177e4 LT |
2216 | #ifdef CONFIG_SMP |
2217 | smp_report_regs(); | |
2218 | #endif | |
37133c00 | 2219 | #endif |
1da177e4 LT |
2220 | if (regs->tstate & TSTATE_PRIV) |
2221 | do_exit(SIGKILL); | |
2222 | do_exit(SIGSEGV); | |
2223 | } | |
2224 | ||
6e7726e1 DM |
2225 | #define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19)) |
2226 | #define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19)) | |
2227 | ||
1da177e4 LT |
2228 | extern int handle_popc(u32 insn, struct pt_regs *regs); |
2229 | extern int handle_ldf_stq(u32 insn, struct pt_regs *regs); | |
6e7726e1 | 2230 | extern int vis_emul(struct pt_regs *, unsigned int); |
1da177e4 LT |
2231 | |
2232 | void do_illegal_instruction(struct pt_regs *regs) | |
2233 | { | |
2234 | unsigned long pc = regs->tpc; | |
2235 | unsigned long tstate = regs->tstate; | |
2236 | u32 insn; | |
2237 | siginfo_t info; | |
2238 | ||
2239 | if (notify_die(DIE_TRAP, "illegal instruction", regs, | |
2240 | 0, 0x10, SIGILL) == NOTIFY_STOP) | |
2241 | return; | |
2242 | ||
2243 | if (tstate & TSTATE_PRIV) | |
2244 | die_if_kernel("Kernel illegal instruction", regs); | |
2245 | if (test_thread_flag(TIF_32BIT)) | |
2246 | pc = (u32)pc; | |
2247 | if (get_user(insn, (u32 __user *) pc) != -EFAULT) { | |
2248 | if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ { | |
2249 | if (handle_popc(insn, regs)) | |
2250 | return; | |
2251 | } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ { | |
2252 | if (handle_ldf_stq(insn, regs)) | |
2253 | return; | |
0c51ed93 | 2254 | } else if (tlb_type == hypervisor) { |
6e7726e1 DM |
2255 | if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) { |
2256 | if (!vis_emul(regs, insn)) | |
2257 | return; | |
2258 | } else { | |
2259 | struct fpustate *f = FPUSTATE; | |
0c51ed93 | 2260 | |
6e7726e1 DM |
2261 | /* XXX maybe verify XFSR bits like |
2262 | * XXX do_fpother() does? | |
2263 | */ | |
2264 | if (do_mathemu(regs, f)) | |
2265 | return; | |
2266 | } | |
1da177e4 LT |
2267 | } |
2268 | } | |
2269 | info.si_signo = SIGILL; | |
2270 | info.si_errno = 0; | |
2271 | info.si_code = ILL_ILLOPC; | |
2272 | info.si_addr = (void __user *)pc; | |
2273 | info.si_trapno = 0; | |
2274 | force_sig_info(SIGILL, &info, current); | |
2275 | } | |
2276 | ||
ed6b0b45 DM |
2277 | extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn); |
2278 | ||
1da177e4 LT |
2279 | void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr) |
2280 | { | |
2281 | siginfo_t info; | |
2282 | ||
2283 | if (notify_die(DIE_TRAP, "memory address unaligned", regs, | |
2284 | 0, 0x34, SIGSEGV) == NOTIFY_STOP) | |
2285 | return; | |
2286 | ||
2287 | if (regs->tstate & TSTATE_PRIV) { | |
ed6b0b45 | 2288 | kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc)); |
1da177e4 LT |
2289 | return; |
2290 | } | |
2291 | info.si_signo = SIGBUS; | |
2292 | info.si_errno = 0; | |
2293 | info.si_code = BUS_ADRALN; | |
2294 | info.si_addr = (void __user *)sfar; | |
2295 | info.si_trapno = 0; | |
2296 | force_sig_info(SIGBUS, &info, current); | |
2297 | } | |
2298 | ||
9f8a5b84 | 2299 | void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) |
ed6b0b45 DM |
2300 | { |
2301 | siginfo_t info; | |
2302 | ||
2303 | if (notify_die(DIE_TRAP, "memory address unaligned", regs, | |
2304 | 0, 0x34, SIGSEGV) == NOTIFY_STOP) | |
2305 | return; | |
2306 | ||
2307 | if (regs->tstate & TSTATE_PRIV) { | |
2308 | kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc)); | |
2309 | return; | |
2310 | } | |
2311 | info.si_signo = SIGBUS; | |
2312 | info.si_errno = 0; | |
2313 | info.si_code = BUS_ADRALN; | |
2314 | info.si_addr = (void __user *) addr; | |
2315 | info.si_trapno = 0; | |
2316 | force_sig_info(SIGBUS, &info, current); | |
2317 | } | |
2318 | ||
1da177e4 LT |
2319 | void do_privop(struct pt_regs *regs) |
2320 | { | |
2321 | siginfo_t info; | |
2322 | ||
2323 | if (notify_die(DIE_TRAP, "privileged operation", regs, | |
2324 | 0, 0x11, SIGILL) == NOTIFY_STOP) | |
2325 | return; | |
2326 | ||
2327 | if (test_thread_flag(TIF_32BIT)) { | |
2328 | regs->tpc &= 0xffffffff; | |
2329 | regs->tnpc &= 0xffffffff; | |
2330 | } | |
2331 | info.si_signo = SIGILL; | |
2332 | info.si_errno = 0; | |
2333 | info.si_code = ILL_PRVOPC; | |
2334 | info.si_addr = (void __user *)regs->tpc; | |
2335 | info.si_trapno = 0; | |
2336 | force_sig_info(SIGILL, &info, current); | |
2337 | } | |
2338 | ||
2339 | void do_privact(struct pt_regs *regs) | |
2340 | { | |
2341 | do_privop(regs); | |
2342 | } | |
2343 | ||
2344 | /* Trap level 1 stuff or other traps we should never see... */ | |
2345 | void do_cee(struct pt_regs *regs) | |
2346 | { | |
2347 | die_if_kernel("TL0: Cache Error Exception", regs); | |
2348 | } | |
2349 | ||
2350 | void do_cee_tl1(struct pt_regs *regs) | |
2351 | { | |
2352 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2353 | die_if_kernel("TL1: Cache Error Exception", regs); | |
2354 | } | |
2355 | ||
2356 | void do_dae_tl1(struct pt_regs *regs) | |
2357 | { | |
2358 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2359 | die_if_kernel("TL1: Data Access Exception", regs); | |
2360 | } | |
2361 | ||
2362 | void do_iae_tl1(struct pt_regs *regs) | |
2363 | { | |
2364 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2365 | die_if_kernel("TL1: Instruction Access Exception", regs); | |
2366 | } | |
2367 | ||
2368 | void do_div0_tl1(struct pt_regs *regs) | |
2369 | { | |
2370 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2371 | die_if_kernel("TL1: DIV0 Exception", regs); | |
2372 | } | |
2373 | ||
2374 | void do_fpdis_tl1(struct pt_regs *regs) | |
2375 | { | |
2376 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2377 | die_if_kernel("TL1: FPU Disabled", regs); | |
2378 | } | |
2379 | ||
2380 | void do_fpieee_tl1(struct pt_regs *regs) | |
2381 | { | |
2382 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2383 | die_if_kernel("TL1: FPU IEEE Exception", regs); | |
2384 | } | |
2385 | ||
2386 | void do_fpother_tl1(struct pt_regs *regs) | |
2387 | { | |
2388 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2389 | die_if_kernel("TL1: FPU Other Exception", regs); | |
2390 | } | |
2391 | ||
2392 | void do_ill_tl1(struct pt_regs *regs) | |
2393 | { | |
2394 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2395 | die_if_kernel("TL1: Illegal Instruction Exception", regs); | |
2396 | } | |
2397 | ||
2398 | void do_irq_tl1(struct pt_regs *regs) | |
2399 | { | |
2400 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2401 | die_if_kernel("TL1: IRQ Exception", regs); | |
2402 | } | |
2403 | ||
2404 | void do_lddfmna_tl1(struct pt_regs *regs) | |
2405 | { | |
2406 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2407 | die_if_kernel("TL1: LDDF Exception", regs); | |
2408 | } | |
2409 | ||
2410 | void do_stdfmna_tl1(struct pt_regs *regs) | |
2411 | { | |
2412 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2413 | die_if_kernel("TL1: STDF Exception", regs); | |
2414 | } | |
2415 | ||
2416 | void do_paw(struct pt_regs *regs) | |
2417 | { | |
2418 | die_if_kernel("TL0: Phys Watchpoint Exception", regs); | |
2419 | } | |
2420 | ||
2421 | void do_paw_tl1(struct pt_regs *regs) | |
2422 | { | |
2423 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2424 | die_if_kernel("TL1: Phys Watchpoint Exception", regs); | |
2425 | } | |
2426 | ||
2427 | void do_vaw(struct pt_regs *regs) | |
2428 | { | |
2429 | die_if_kernel("TL0: Virt Watchpoint Exception", regs); | |
2430 | } | |
2431 | ||
2432 | void do_vaw_tl1(struct pt_regs *regs) | |
2433 | { | |
2434 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2435 | die_if_kernel("TL1: Virt Watchpoint Exception", regs); | |
2436 | } | |
2437 | ||
2438 | void do_tof_tl1(struct pt_regs *regs) | |
2439 | { | |
2440 | dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); | |
2441 | die_if_kernel("TL1: Tag Overflow Exception", regs); | |
2442 | } | |
2443 | ||
2444 | void do_getpsr(struct pt_regs *regs) | |
2445 | { | |
2446 | regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate); | |
2447 | regs->tpc = regs->tnpc; | |
2448 | regs->tnpc += 4; | |
2449 | if (test_thread_flag(TIF_32BIT)) { | |
2450 | regs->tpc &= 0xffffffff; | |
2451 | regs->tnpc &= 0xffffffff; | |
2452 | } | |
2453 | } | |
2454 | ||
56fb4df6 DM |
2455 | struct trap_per_cpu trap_block[NR_CPUS]; |
2456 | ||
2457 | /* This can get invoked before sched_init() so play it super safe | |
2458 | * and use hard_smp_processor_id(). | |
2459 | */ | |
72aff53f | 2460 | void init_cur_cpu_trap(struct thread_info *t) |
56fb4df6 DM |
2461 | { |
2462 | int cpu = hard_smp_processor_id(); | |
2463 | struct trap_per_cpu *p = &trap_block[cpu]; | |
2464 | ||
72aff53f | 2465 | p->thread = t; |
56fb4df6 DM |
2466 | p->pgd_paddr = 0; |
2467 | } | |
2468 | ||
1da177e4 | 2469 | extern void thread_info_offsets_are_bolixed_dave(void); |
56fb4df6 | 2470 | extern void trap_per_cpu_offsets_are_bolixed_dave(void); |
dcc1e8dd | 2471 | extern void tsb_config_offsets_are_bolixed_dave(void); |
1da177e4 LT |
2472 | |
2473 | /* Only invoked on boot processor. */ | |
2474 | void __init trap_init(void) | |
2475 | { | |
2476 | /* Compile time sanity check. */ | |
2477 | if (TI_TASK != offsetof(struct thread_info, task) || | |
2478 | TI_FLAGS != offsetof(struct thread_info, flags) || | |
2479 | TI_CPU != offsetof(struct thread_info, cpu) || | |
2480 | TI_FPSAVED != offsetof(struct thread_info, fpsaved) || | |
2481 | TI_KSP != offsetof(struct thread_info, ksp) || | |
2482 | TI_FAULT_ADDR != offsetof(struct thread_info, fault_address) || | |
2483 | TI_KREGS != offsetof(struct thread_info, kregs) || | |
2484 | TI_UTRAPS != offsetof(struct thread_info, utraps) || | |
2485 | TI_EXEC_DOMAIN != offsetof(struct thread_info, exec_domain) || | |
2486 | TI_REG_WINDOW != offsetof(struct thread_info, reg_window) || | |
2487 | TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) || | |
2488 | TI_GSR != offsetof(struct thread_info, gsr) || | |
2489 | TI_XFSR != offsetof(struct thread_info, xfsr) || | |
2490 | TI_USER_CNTD0 != offsetof(struct thread_info, user_cntd0) || | |
2491 | TI_USER_CNTD1 != offsetof(struct thread_info, user_cntd1) || | |
2492 | TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) || | |
2493 | TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) || | |
2494 | TI_PCR != offsetof(struct thread_info, pcr_reg) || | |
1da177e4 | 2495 | TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) || |
db7d9a4e DM |
2496 | TI_NEW_CHILD != offsetof(struct thread_info, new_child) || |
2497 | TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) || | |
a3f99858 DM |
2498 | TI_RESTART_BLOCK != offsetof(struct thread_info, restart_block) || |
2499 | TI_KUNA_REGS != offsetof(struct thread_info, kern_una_regs) || | |
2500 | TI_KUNA_INSN != offsetof(struct thread_info, kern_una_insn) || | |
1da177e4 LT |
2501 | TI_FPREGS != offsetof(struct thread_info, fpregs) || |
2502 | (TI_FPREGS & (64 - 1))) | |
2503 | thread_info_offsets_are_bolixed_dave(); | |
2504 | ||
56fb4df6 | 2505 | if (TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, thread) || |
e088ad7c DM |
2506 | (TRAP_PER_CPU_PGD_PADDR != |
2507 | offsetof(struct trap_per_cpu, pgd_paddr)) || | |
2508 | (TRAP_PER_CPU_CPU_MONDO_PA != | |
2509 | offsetof(struct trap_per_cpu, cpu_mondo_pa)) || | |
2510 | (TRAP_PER_CPU_DEV_MONDO_PA != | |
2511 | offsetof(struct trap_per_cpu, dev_mondo_pa)) || | |
2512 | (TRAP_PER_CPU_RESUM_MONDO_PA != | |
2513 | offsetof(struct trap_per_cpu, resum_mondo_pa)) || | |
5b0c0572 DM |
2514 | (TRAP_PER_CPU_RESUM_KBUF_PA != |
2515 | offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) || | |
e088ad7c DM |
2516 | (TRAP_PER_CPU_NONRESUM_MONDO_PA != |
2517 | offsetof(struct trap_per_cpu, nonresum_mondo_pa)) || | |
5b0c0572 DM |
2518 | (TRAP_PER_CPU_NONRESUM_KBUF_PA != |
2519 | offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) || | |
e088ad7c | 2520 | (TRAP_PER_CPU_FAULT_INFO != |
1d2f1f90 DM |
2521 | offsetof(struct trap_per_cpu, fault_info)) || |
2522 | (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA != | |
2523 | offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) || | |
2524 | (TRAP_PER_CPU_CPU_LIST_PA != | |
dcc1e8dd DM |
2525 | offsetof(struct trap_per_cpu, cpu_list_pa)) || |
2526 | (TRAP_PER_CPU_TSB_HUGE != | |
2527 | offsetof(struct trap_per_cpu, tsb_huge)) || | |
2528 | (TRAP_PER_CPU_TSB_HUGE_TEMP != | |
fd0504c3 | 2529 | offsetof(struct trap_per_cpu, tsb_huge_temp)) || |
eb2d8d60 DM |
2530 | (TRAP_PER_CPU_IRQ_WORKLIST_PA != |
2531 | offsetof(struct trap_per_cpu, irq_worklist_pa)) || | |
5cbc3073 DM |
2532 | (TRAP_PER_CPU_CPU_MONDO_QMASK != |
2533 | offsetof(struct trap_per_cpu, cpu_mondo_qmask)) || | |
2534 | (TRAP_PER_CPU_DEV_MONDO_QMASK != | |
2535 | offsetof(struct trap_per_cpu, dev_mondo_qmask)) || | |
2536 | (TRAP_PER_CPU_RESUM_QMASK != | |
2537 | offsetof(struct trap_per_cpu, resum_qmask)) || | |
2538 | (TRAP_PER_CPU_NONRESUM_QMASK != | |
2539 | offsetof(struct trap_per_cpu, nonresum_qmask))) | |
56fb4df6 DM |
2540 | trap_per_cpu_offsets_are_bolixed_dave(); |
2541 | ||
dcc1e8dd DM |
2542 | if ((TSB_CONFIG_TSB != |
2543 | offsetof(struct tsb_config, tsb)) || | |
2544 | (TSB_CONFIG_RSS_LIMIT != | |
2545 | offsetof(struct tsb_config, tsb_rss_limit)) || | |
2546 | (TSB_CONFIG_NENTRIES != | |
2547 | offsetof(struct tsb_config, tsb_nentries)) || | |
2548 | (TSB_CONFIG_REG_VAL != | |
2549 | offsetof(struct tsb_config, tsb_reg_val)) || | |
2550 | (TSB_CONFIG_MAP_VADDR != | |
2551 | offsetof(struct tsb_config, tsb_map_vaddr)) || | |
2552 | (TSB_CONFIG_MAP_PTE != | |
2553 | offsetof(struct tsb_config, tsb_map_pte))) | |
2554 | tsb_config_offsets_are_bolixed_dave(); | |
2555 | ||
1da177e4 LT |
2556 | /* Attach to the address space of init_task. On SMP we |
2557 | * do this in smp.c:smp_callin for other cpus. | |
2558 | */ | |
2559 | atomic_inc(&init_mm.mm_count); | |
2560 | current->active_mm = &init_mm; | |
2561 | } |