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b920de1b DH |
1 | /* MN10300 Exception handling |
2 | * | |
3 | * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd. | |
4 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
5 | * Modified by David Howells (dhowells@redhat.com) | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public Licence | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the Licence, or (at your option) any later version. | |
11 | */ | |
12 | #include <linux/sched.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/string.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/ptrace.h> | |
17 | #include <linux/timer.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/smp.h> | |
b920de1b DH |
20 | #include <linux/init.h> |
21 | #include <linux/delay.h> | |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/kallsyms.h> | |
25 | #include <linux/pci.h> | |
26 | #include <linux/kdebug.h> | |
27 | #include <linux/bug.h> | |
28 | #include <linux/irq.h> | |
29 | #include <asm/processor.h> | |
30 | #include <asm/system.h> | |
31 | #include <asm/uaccess.h> | |
32 | #include <asm/io.h> | |
33 | #include <asm/atomic.h> | |
34 | #include <asm/smp.h> | |
35 | #include <asm/pgalloc.h> | |
36 | #include <asm/cacheflush.h> | |
37 | #include <asm/cpu-regs.h> | |
38 | #include <asm/busctl-regs.h> | |
2f2a2132 | 39 | #include <unit/leds.h> |
b920de1b DH |
40 | #include <asm/fpu.h> |
41 | #include <asm/gdb-stub.h> | |
42 | #include <asm/sections.h> | |
43 | ||
44 | #if (CONFIG_INTERRUPT_VECTOR_BASE & 0xffffff) | |
45 | #error "INTERRUPT_VECTOR_BASE not aligned to 16MiB boundary!" | |
46 | #endif | |
47 | ||
b920de1b DH |
48 | int kstack_depth_to_print = 24; |
49 | ||
50 | spinlock_t die_lock = __SPIN_LOCK_UNLOCKED(die_lock); | |
51 | ||
52 | ATOMIC_NOTIFIER_HEAD(mn10300_die_chain); | |
53 | ||
54 | /* | |
55 | * These constants are for searching for possible module text | |
56 | * segments. MODULE_RANGE is a guess of how much space is likely | |
57 | * to be vmalloced. | |
58 | */ | |
59 | #define MODULE_RANGE (8 * 1024 * 1024) | |
60 | ||
61 | #define DO_ERROR(signr, prologue, str, name) \ | |
62 | asmlinkage void name(struct pt_regs *regs, u32 intcode) \ | |
63 | { \ | |
64 | prologue; \ | |
65 | if (die_if_no_fixup(str, regs, intcode)) \ | |
66 | return; \ | |
67 | force_sig(signr, current); \ | |
68 | } | |
69 | ||
70 | #define DO_EINFO(signr, prologue, str, name, sicode) \ | |
71 | asmlinkage void name(struct pt_regs *regs, u32 intcode) \ | |
72 | { \ | |
73 | siginfo_t info; \ | |
74 | prologue; \ | |
75 | if (die_if_no_fixup(str, regs, intcode)) \ | |
76 | return; \ | |
77 | info.si_signo = signr; \ | |
78 | if (signr == SIGILL && sicode == ILL_ILLOPC) { \ | |
79 | uint8_t opcode; \ | |
80 | if (get_user(opcode, (uint8_t __user *)regs->pc) == 0) \ | |
81 | if (opcode == 0xff) \ | |
82 | info.si_signo = SIGTRAP; \ | |
83 | } \ | |
84 | info.si_errno = 0; \ | |
85 | info.si_code = sicode; \ | |
86 | info.si_addr = (void *) regs->pc; \ | |
87 | force_sig_info(info.si_signo, &info, current); \ | |
88 | } | |
89 | ||
90 | DO_ERROR(SIGTRAP, {}, "trap", trap); | |
91 | DO_ERROR(SIGSEGV, {}, "ibreak", ibreak); | |
92 | DO_ERROR(SIGSEGV, {}, "obreak", obreak); | |
93 | DO_EINFO(SIGSEGV, {}, "access error", access_error, SEGV_ACCERR); | |
94 | DO_EINFO(SIGSEGV, {}, "insn access error", insn_acc_error, SEGV_ACCERR); | |
95 | DO_EINFO(SIGSEGV, {}, "data access error", data_acc_error, SEGV_ACCERR); | |
96 | DO_EINFO(SIGILL, {}, "privileged opcode", priv_op, ILL_PRVOPC); | |
97 | DO_EINFO(SIGILL, {}, "invalid opcode", invalid_op, ILL_ILLOPC); | |
98 | DO_EINFO(SIGILL, {}, "invalid ex opcode", invalid_exop, ILL_ILLOPC); | |
99 | DO_EINFO(SIGBUS, {}, "invalid address", mem_error, BUS_ADRERR); | |
100 | DO_EINFO(SIGBUS, {}, "bus error", bus_error, BUS_ADRERR); | |
b920de1b DH |
101 | |
102 | DO_ERROR(SIGTRAP, | |
103 | #ifndef CONFIG_MN10300_USING_JTAG | |
104 | DCR &= ~0x0001, | |
105 | #else | |
106 | {}, | |
107 | #endif | |
108 | "single step", istep); | |
109 | ||
110 | /* | |
111 | * handle NMI | |
112 | */ | |
113 | asmlinkage void nmi(struct pt_regs *regs, enum exception_code code) | |
114 | { | |
115 | /* see if gdbstub wants to deal with it */ | |
116 | #ifdef CONFIG_GDBSTUB | |
117 | if (gdbstub_intercept(regs, code)) | |
118 | return; | |
119 | #endif | |
120 | ||
121 | printk(KERN_WARNING "--- Register Dump ---\n"); | |
122 | show_registers(regs); | |
123 | printk(KERN_WARNING "---------------------\n"); | |
124 | } | |
125 | ||
126 | /* | |
127 | * show a stack trace from the specified stack pointer | |
128 | */ | |
129 | void show_trace(unsigned long *sp) | |
130 | { | |
131 | unsigned long *stack, addr, module_start, module_end; | |
132 | int i; | |
133 | ||
ad361c98 | 134 | printk(KERN_EMERG "\nCall Trace:"); |
b920de1b DH |
135 | |
136 | stack = sp; | |
137 | i = 0; | |
138 | module_start = VMALLOC_START; | |
139 | module_end = VMALLOC_END; | |
140 | ||
141 | while (((long) stack & (THREAD_SIZE - 1)) != 0) { | |
142 | addr = *stack++; | |
143 | if (__kernel_text_address(addr)) { | |
144 | #if 1 | |
145 | printk(" [<%08lx>]", addr); | |
146 | print_symbol(" %s", addr); | |
147 | printk("\n"); | |
148 | #else | |
149 | if ((i % 6) == 0) | |
ad361c98 | 150 | printk(KERN_EMERG " "); |
b920de1b DH |
151 | printk("[<%08lx>] ", addr); |
152 | i++; | |
153 | #endif | |
154 | } | |
155 | } | |
156 | ||
157 | printk("\n"); | |
158 | } | |
159 | ||
160 | /* | |
161 | * show the raw stack from the specified stack pointer | |
162 | */ | |
163 | void show_stack(struct task_struct *task, unsigned long *sp) | |
164 | { | |
165 | unsigned long *stack; | |
166 | int i; | |
167 | ||
168 | if (!sp) | |
169 | sp = (unsigned long *) &sp; | |
170 | ||
171 | stack = sp; | |
172 | printk(KERN_EMERG "Stack:"); | |
173 | for (i = 0; i < kstack_depth_to_print; i++) { | |
174 | if (((long) stack & (THREAD_SIZE - 1)) == 0) | |
175 | break; | |
176 | if ((i % 8) == 0) | |
ad361c98 | 177 | printk(KERN_EMERG " "); |
b920de1b DH |
178 | printk("%08lx ", *stack++); |
179 | } | |
180 | ||
181 | show_trace(sp); | |
182 | } | |
183 | ||
184 | /* | |
185 | * the architecture-independent dump_stack generator | |
186 | */ | |
187 | void dump_stack(void) | |
188 | { | |
189 | unsigned long stack; | |
190 | ||
191 | show_stack(current, &stack); | |
192 | } | |
193 | EXPORT_SYMBOL(dump_stack); | |
194 | ||
195 | /* | |
196 | * dump the register file in the specified exception frame | |
197 | */ | |
198 | void show_registers_only(struct pt_regs *regs) | |
199 | { | |
200 | unsigned long ssp; | |
201 | ||
202 | ssp = (unsigned long) regs + sizeof(*regs); | |
203 | ||
204 | printk(KERN_EMERG "PC: %08lx EPSW: %08lx SSP: %08lx mode: %s\n", | |
205 | regs->pc, regs->epsw, ssp, user_mode(regs) ? "User" : "Super"); | |
206 | printk(KERN_EMERG "d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n", | |
207 | regs->d0, regs->d1, regs->d2, regs->d3); | |
208 | printk(KERN_EMERG "a0: %08lx a1: %08lx a2: %08lx a3: %08lx\n", | |
209 | regs->a0, regs->a1, regs->a2, regs->a3); | |
210 | printk(KERN_EMERG "e0: %08lx e1: %08lx e2: %08lx e3: %08lx\n", | |
211 | regs->e0, regs->e1, regs->e2, regs->e3); | |
212 | printk(KERN_EMERG "e4: %08lx e5: %08lx e6: %08lx e7: %08lx\n", | |
213 | regs->e4, regs->e5, regs->e6, regs->e7); | |
214 | printk(KERN_EMERG "lar: %08lx lir: %08lx mdr: %08lx usp: %08lx\n", | |
215 | regs->lar, regs->lir, regs->mdr, regs->sp); | |
216 | printk(KERN_EMERG "cvf: %08lx crl: %08lx crh: %08lx drq: %08lx\n", | |
217 | regs->mcvf, regs->mcrl, regs->mcrh, regs->mdrq); | |
218 | printk(KERN_EMERG "threadinfo=%p task=%p)\n", | |
219 | current_thread_info(), current); | |
220 | ||
368dd5ac AT |
221 | if ((unsigned long) current >= PAGE_OFFSET && |
222 | (unsigned long) current < (unsigned long)high_memory) | |
b920de1b DH |
223 | printk(KERN_EMERG "Process %s (pid: %d)\n", |
224 | current->comm, current->pid); | |
225 | ||
368dd5ac AT |
226 | #ifdef CONFIG_SMP |
227 | printk(KERN_EMERG "CPUID: %08x\n", CPUID); | |
228 | #endif | |
b920de1b DH |
229 | printk(KERN_EMERG "CPUP: %04hx\n", CPUP); |
230 | printk(KERN_EMERG "TBR: %08x\n", TBR); | |
231 | printk(KERN_EMERG "DEAR: %08x\n", DEAR); | |
232 | printk(KERN_EMERG "sISR: %08x\n", sISR); | |
233 | printk(KERN_EMERG "NMICR: %04hx\n", NMICR); | |
234 | printk(KERN_EMERG "BCBERR: %08x\n", BCBERR); | |
235 | printk(KERN_EMERG "BCBEAR: %08x\n", BCBEAR); | |
236 | printk(KERN_EMERG "MMUFCR: %08x\n", MMUFCR); | |
237 | printk(KERN_EMERG "IPTEU : %08x IPTEL2: %08x\n", IPTEU, IPTEL2); | |
238 | printk(KERN_EMERG "DPTEU: %08x DPTEL2: %08x\n", DPTEU, DPTEL2); | |
239 | } | |
240 | ||
241 | /* | |
242 | * dump the registers and the stack | |
243 | */ | |
244 | void show_registers(struct pt_regs *regs) | |
245 | { | |
246 | unsigned long sp; | |
247 | int i; | |
248 | ||
249 | show_registers_only(regs); | |
250 | ||
251 | if (!user_mode(regs)) | |
252 | sp = (unsigned long) regs + sizeof(*regs); | |
253 | else | |
254 | sp = regs->sp; | |
255 | ||
256 | /* when in-kernel, we also print out the stack and code at the | |
257 | * time of the fault.. | |
258 | */ | |
259 | if (!user_mode(regs)) { | |
260 | printk(KERN_EMERG "\n"); | |
261 | show_stack(current, (unsigned long *) sp); | |
262 | ||
263 | #if 0 | |
ad361c98 | 264 | printk(KERN_EMERG "\nCode: "); |
b920de1b DH |
265 | if (regs->pc < PAGE_OFFSET) |
266 | goto bad; | |
267 | ||
268 | for (i = 0; i < 20; i++) { | |
269 | unsigned char c; | |
270 | if (__get_user(c, &((unsigned char *) regs->pc)[i])) | |
271 | goto bad; | |
272 | printk("%02x ", c); | |
273 | } | |
274 | #else | |
275 | i = 0; | |
276 | #endif | |
277 | } | |
278 | ||
279 | printk("\n"); | |
280 | return; | |
281 | ||
282 | #if 0 | |
283 | bad: | |
284 | printk(KERN_EMERG " Bad PC value."); | |
285 | break; | |
286 | #endif | |
287 | } | |
288 | ||
289 | /* | |
290 | * | |
291 | */ | |
292 | void show_trace_task(struct task_struct *tsk) | |
293 | { | |
294 | unsigned long sp = tsk->thread.sp; | |
295 | ||
296 | /* User space on another CPU? */ | |
297 | if ((sp ^ (unsigned long) tsk) & (PAGE_MASK << 1)) | |
298 | return; | |
299 | ||
300 | show_trace((unsigned long *) sp); | |
301 | } | |
302 | ||
303 | /* | |
304 | * note the untimely death of part of the kernel | |
305 | */ | |
306 | void die(const char *str, struct pt_regs *regs, enum exception_code code) | |
307 | { | |
308 | console_verbose(); | |
309 | spin_lock_irq(&die_lock); | |
ad361c98 | 310 | printk(KERN_EMERG "\n%s: %04x\n", |
b920de1b DH |
311 | str, code & 0xffff); |
312 | show_registers(regs); | |
313 | ||
314 | if (regs->pc >= 0x02000000 && regs->pc < 0x04000000 && | |
315 | (regs->epsw & (EPSW_IM | EPSW_IE)) != (EPSW_IM | EPSW_IE)) { | |
316 | printk(KERN_EMERG "Exception in usermode interrupt handler\n"); | |
ad361c98 | 317 | printk(KERN_EMERG "\nPlease connect to kernel debugger !!\n"); |
b920de1b DH |
318 | asm volatile ("0: bra 0b"); |
319 | } | |
320 | ||
321 | spin_unlock_irq(&die_lock); | |
322 | do_exit(SIGSEGV); | |
323 | } | |
324 | ||
325 | /* | |
326 | * see if there's a fixup handler we can force a jump to when an exception | |
327 | * happens due to something kernel code did | |
328 | */ | |
329 | int die_if_no_fixup(const char *str, struct pt_regs *regs, | |
330 | enum exception_code code) | |
331 | { | |
332 | if (user_mode(regs)) | |
333 | return 0; | |
334 | ||
335 | peripheral_leds_display_exception(code); | |
336 | ||
337 | switch (code) { | |
338 | /* see if we can fixup the kernel accessing memory */ | |
339 | case EXCEP_ITLBMISS: | |
340 | case EXCEP_DTLBMISS: | |
341 | case EXCEP_IAERROR: | |
342 | case EXCEP_DAERROR: | |
343 | case EXCEP_MEMERR: | |
344 | case EXCEP_MISALIGN: | |
345 | case EXCEP_BUSERROR: | |
346 | case EXCEP_ILLDATACC: | |
347 | case EXCEP_IOINSACC: | |
348 | case EXCEP_PRIVINSACC: | |
349 | case EXCEP_PRIVDATACC: | |
350 | case EXCEP_DATINSACC: | |
351 | if (fixup_exception(regs)) | |
352 | return 1; | |
353 | case EXCEP_UNIMPINS: | |
354 | if (regs->pc && *(uint8_t *)regs->pc == 0xff) | |
355 | if (notify_die(DIE_BREAKPOINT, str, regs, code, 0, 0)) | |
356 | return 1; | |
357 | break; | |
358 | default: | |
359 | break; | |
360 | } | |
361 | ||
362 | /* see if gdbstub wants to deal with it */ | |
363 | #ifdef CONFIG_GDBSTUB | |
364 | if (gdbstub_intercept(regs, code)) | |
365 | return 1; | |
366 | #endif | |
367 | ||
368 | if (notify_die(DIE_GPF, str, regs, code, 0, 0)) | |
369 | return 1; | |
370 | ||
371 | /* make the process die as the last resort */ | |
372 | die(str, regs, code); | |
373 | } | |
374 | ||
375 | /* | |
376 | * handle unsupported syscall instructions (syscall 1-15) | |
377 | */ | |
378 | static asmlinkage void unsupported_syscall(struct pt_regs *regs, | |
379 | enum exception_code code) | |
380 | { | |
381 | struct task_struct *tsk = current; | |
382 | siginfo_t info; | |
383 | ||
384 | /* catch a kernel BUG() */ | |
385 | if (code == EXCEP_SYSCALL15 && !user_mode(regs)) { | |
386 | if (report_bug(regs->pc, regs) == BUG_TRAP_TYPE_BUG) { | |
387 | #ifdef CONFIG_GDBSTUB | |
aa409e02 | 388 | gdbstub_intercept(regs, code); |
b920de1b DH |
389 | #endif |
390 | } | |
391 | } | |
392 | ||
393 | regs->pc -= 2; /* syscall return addr is _after_ the instruction */ | |
394 | ||
395 | die_if_no_fixup("An unsupported syscall insn was used by the kernel\n", | |
396 | regs, code); | |
397 | ||
398 | info.si_signo = SIGILL; | |
399 | info.si_errno = ENOSYS; | |
400 | info.si_code = ILL_ILLTRP; | |
401 | info.si_addr = (void *) regs->pc; | |
402 | force_sig_info(SIGILL, &info, tsk); | |
403 | } | |
404 | ||
405 | /* | |
406 | * display the register file when the stack pointer gets clobbered | |
407 | */ | |
408 | asmlinkage void do_double_fault(struct pt_regs *regs) | |
409 | { | |
410 | struct task_struct *tsk = current; | |
411 | ||
412 | strcpy(tsk->comm, "emergency tsk"); | |
413 | tsk->pid = 0; | |
414 | console_verbose(); | |
415 | printk(KERN_EMERG "--- double fault ---\n"); | |
416 | show_registers(regs); | |
417 | } | |
418 | ||
419 | /* | |
420 | * asynchronous bus error (external, usually I/O DMA) | |
421 | */ | |
422 | asmlinkage void io_bus_error(u32 bcberr, u32 bcbear, struct pt_regs *regs) | |
423 | { | |
424 | console_verbose(); | |
425 | ||
ad361c98 JP |
426 | printk(KERN_EMERG "Asynchronous I/O Bus Error\n"); |
427 | printk(KERN_EMERG "==========================\n"); | |
b920de1b DH |
428 | |
429 | if (bcberr & BCBERR_BEME) | |
430 | printk(KERN_EMERG "- Multiple recorded errors\n"); | |
431 | ||
432 | printk(KERN_EMERG "- Faulting Buses:%s%s%s\n", | |
433 | bcberr & BCBERR_BEMR_CI ? " CPU-Ins-Fetch" : "", | |
434 | bcberr & BCBERR_BEMR_CD ? " CPU-Data" : "", | |
435 | bcberr & BCBERR_BEMR_DMA ? " DMA" : ""); | |
436 | ||
437 | printk(KERN_EMERG "- %s %s access made to %s at address %08x\n", | |
438 | bcberr & BCBERR_BEBST ? "Burst" : "Single", | |
439 | bcberr & BCBERR_BERW ? "Read" : "Write", | |
440 | bcberr & BCBERR_BESB_MON ? "Monitor Space" : | |
441 | bcberr & BCBERR_BESB_IO ? "Internal CPU I/O Space" : | |
442 | bcberr & BCBERR_BESB_EX ? "External I/O Bus" : | |
443 | bcberr & BCBERR_BESB_OPEX ? "External Memory Bus" : | |
444 | "On Chip Memory", | |
445 | bcbear | |
446 | ); | |
447 | ||
448 | printk(KERN_EMERG "- Detected by the %s\n", | |
449 | bcberr&BCBERR_BESD ? "Bus Control Unit" : "Slave Bus"); | |
450 | ||
451 | #ifdef CONFIG_PCI | |
452 | #define BRIDGEREGB(X) (*(volatile __u8 *)(0xBE040000 + (X))) | |
453 | #define BRIDGEREGW(X) (*(volatile __u16 *)(0xBE040000 + (X))) | |
454 | #define BRIDGEREGL(X) (*(volatile __u32 *)(0xBE040000 + (X))) | |
455 | ||
456 | printk(KERN_EMERG "- PCI Memory Paging Reg: %08x\n", | |
457 | *(volatile __u32 *) (0xBFFFFFF4)); | |
458 | printk(KERN_EMERG "- PCI Bridge Base Address 0: %08x\n", | |
459 | BRIDGEREGL(PCI_BASE_ADDRESS_0)); | |
460 | printk(KERN_EMERG "- PCI Bridge AMPCI Base Address: %08x\n", | |
461 | BRIDGEREGL(0x48)); | |
462 | printk(KERN_EMERG "- PCI Bridge Command: %04hx\n", | |
463 | BRIDGEREGW(PCI_COMMAND)); | |
464 | printk(KERN_EMERG "- PCI Bridge Status: %04hx\n", | |
465 | BRIDGEREGW(PCI_STATUS)); | |
466 | printk(KERN_EMERG "- PCI Bridge Int Status: %08hx\n", | |
467 | BRIDGEREGL(0x4c)); | |
468 | #endif | |
469 | ||
470 | printk(KERN_EMERG "\n"); | |
471 | show_registers(regs); | |
472 | ||
473 | panic("Halted due to asynchronous I/O Bus Error\n"); | |
474 | } | |
475 | ||
476 | /* | |
477 | * handle an exception for which a handler has not yet been installed | |
478 | */ | |
479 | asmlinkage void uninitialised_exception(struct pt_regs *regs, | |
480 | enum exception_code code) | |
481 | { | |
482 | ||
483 | /* see if gdbstub wants to deal with it */ | |
484 | #ifdef CONFIG_GDBSTUB | |
485 | if (gdbstub_intercept(regs, code)) | |
486 | return; | |
487 | #endif | |
488 | ||
489 | peripheral_leds_display_exception(code); | |
490 | printk(KERN_EMERG "Uninitialised Exception 0x%04x\n", code & 0xFFFF); | |
491 | show_registers(regs); | |
492 | ||
493 | for (;;) | |
494 | continue; | |
495 | } | |
496 | ||
497 | /* | |
498 | * set an interrupt stub to jump to a handler | |
499 | * ! NOTE: this does *not* flush the caches | |
500 | */ | |
501 | void __init __set_intr_stub(enum exception_code code, void *handler) | |
502 | { | |
503 | unsigned long addr; | |
504 | u8 *vector = (u8 *)(CONFIG_INTERRUPT_VECTOR_BASE + code); | |
505 | ||
506 | addr = (unsigned long) handler - (unsigned long) vector; | |
507 | vector[0] = 0xdc; /* JMP handler */ | |
508 | vector[1] = addr; | |
509 | vector[2] = addr >> 8; | |
510 | vector[3] = addr >> 16; | |
511 | vector[4] = addr >> 24; | |
512 | vector[5] = 0xcb; | |
513 | vector[6] = 0xcb; | |
514 | vector[7] = 0xcb; | |
515 | } | |
516 | ||
517 | /* | |
518 | * set an interrupt stub to jump to a handler | |
519 | */ | |
520 | void __init set_intr_stub(enum exception_code code, void *handler) | |
521 | { | |
522 | unsigned long addr; | |
523 | u8 *vector = (u8 *)(CONFIG_INTERRUPT_VECTOR_BASE + code); | |
368dd5ac | 524 | unsigned long flags; |
b920de1b DH |
525 | |
526 | addr = (unsigned long) handler - (unsigned long) vector; | |
368dd5ac AT |
527 | |
528 | flags = arch_local_cli_save(); | |
529 | ||
b920de1b DH |
530 | vector[0] = 0xdc; /* JMP handler */ |
531 | vector[1] = addr; | |
532 | vector[2] = addr >> 8; | |
533 | vector[3] = addr >> 16; | |
534 | vector[4] = addr >> 24; | |
535 | vector[5] = 0xcb; | |
536 | vector[6] = 0xcb; | |
537 | vector[7] = 0xcb; | |
538 | ||
368dd5ac AT |
539 | arch_local_irq_restore(flags); |
540 | ||
b478491f | 541 | #ifndef CONFIG_MN10300_CACHE_SNOOP |
b920de1b DH |
542 | mn10300_dcache_flush_inv(); |
543 | mn10300_icache_inv(); | |
b478491f | 544 | #endif |
b920de1b DH |
545 | } |
546 | ||
b920de1b DH |
547 | /* |
548 | * initialise the exception table | |
549 | */ | |
550 | void __init trap_init(void) | |
551 | { | |
552 | set_excp_vector(EXCEP_TRAP, trap); | |
553 | set_excp_vector(EXCEP_ISTEP, istep); | |
554 | set_excp_vector(EXCEP_IBREAK, ibreak); | |
555 | set_excp_vector(EXCEP_OBREAK, obreak); | |
556 | ||
557 | set_excp_vector(EXCEP_PRIVINS, priv_op); | |
558 | set_excp_vector(EXCEP_UNIMPINS, invalid_op); | |
559 | set_excp_vector(EXCEP_UNIMPEXINS, invalid_exop); | |
560 | set_excp_vector(EXCEP_MEMERR, mem_error); | |
561 | set_excp_vector(EXCEP_MISALIGN, misalignment); | |
562 | set_excp_vector(EXCEP_BUSERROR, bus_error); | |
563 | set_excp_vector(EXCEP_ILLINSACC, insn_acc_error); | |
564 | set_excp_vector(EXCEP_ILLDATACC, data_acc_error); | |
565 | set_excp_vector(EXCEP_IOINSACC, insn_acc_error); | |
566 | set_excp_vector(EXCEP_PRIVINSACC, insn_acc_error); | |
567 | set_excp_vector(EXCEP_PRIVDATACC, data_acc_error); | |
568 | set_excp_vector(EXCEP_DATINSACC, insn_acc_error); | |
b920de1b DH |
569 | set_excp_vector(EXCEP_FPU_UNIMPINS, fpu_invalid_op); |
570 | set_excp_vector(EXCEP_FPU_OPERATION, fpu_exception); | |
571 | ||
572 | set_excp_vector(EXCEP_NMI, nmi); | |
573 | ||
574 | set_excp_vector(EXCEP_SYSCALL1, unsupported_syscall); | |
575 | set_excp_vector(EXCEP_SYSCALL2, unsupported_syscall); | |
576 | set_excp_vector(EXCEP_SYSCALL3, unsupported_syscall); | |
577 | set_excp_vector(EXCEP_SYSCALL4, unsupported_syscall); | |
578 | set_excp_vector(EXCEP_SYSCALL5, unsupported_syscall); | |
579 | set_excp_vector(EXCEP_SYSCALL6, unsupported_syscall); | |
580 | set_excp_vector(EXCEP_SYSCALL7, unsupported_syscall); | |
581 | set_excp_vector(EXCEP_SYSCALL8, unsupported_syscall); | |
582 | set_excp_vector(EXCEP_SYSCALL9, unsupported_syscall); | |
583 | set_excp_vector(EXCEP_SYSCALL10, unsupported_syscall); | |
584 | set_excp_vector(EXCEP_SYSCALL11, unsupported_syscall); | |
585 | set_excp_vector(EXCEP_SYSCALL12, unsupported_syscall); | |
586 | set_excp_vector(EXCEP_SYSCALL13, unsupported_syscall); | |
587 | set_excp_vector(EXCEP_SYSCALL14, unsupported_syscall); | |
588 | set_excp_vector(EXCEP_SYSCALL15, unsupported_syscall); | |
589 | } | |
590 | ||
591 | /* | |
592 | * determine if a program counter value is a valid bug address | |
593 | */ | |
594 | int is_valid_bugaddr(unsigned long pc) | |
595 | { | |
596 | return pc >= PAGE_OFFSET; | |
597 | } |