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authorDavid Howells <dhowells@redhat.com>2008-02-08 07:19:31 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 12:22:30 -0500
commitb920de1b77b72ca9432ac3f97edb26541e65e5dd (patch)
tree40fa9be1470e929c47927dea7eddf184c0204229 /arch/mn10300/kernel/traps.c
parentef3d534754f31fed9c3b976fee1ece1b3bc38282 (diff)
mn10300: add the MN10300/AM33 architecture to the kernel
Add architecture support for the MN10300/AM33 CPUs produced by MEI to the kernel. This patch also adds board support for the ASB2303 with the ASB2308 daughter board, and the ASB2305. The only processor supported is the MN103E010, which is an AM33v2 core plus on-chip devices. [akpm@linux-foundation.org: nuke cvs control strings] Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com> Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/mn10300/kernel/traps.c')
-rw-r--r--arch/mn10300/kernel/traps.c619
1 files changed, 619 insertions, 0 deletions
diff --git a/arch/mn10300/kernel/traps.c b/arch/mn10300/kernel/traps.c
new file mode 100644
index 000000000000..8b9dc6d9dcc6
--- /dev/null
+++ b/arch/mn10300/kernel/traps.c
@@ -0,0 +1,619 @@
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>
20#include <linux/smp_lock.h>
21#include <linux/init.h>
22#include <linux/delay.h>
23#include <linux/spinlock.h>
24#include <linux/interrupt.h>
25#include <linux/kallsyms.h>
26#include <linux/pci.h>
27#include <linux/kdebug.h>
28#include <linux/bug.h>
29#include <linux/irq.h>
30#include <asm/processor.h>
31#include <asm/system.h>
32#include <asm/uaccess.h>
33#include <asm/io.h>
34#include <asm/atomic.h>
35#include <asm/smp.h>
36#include <asm/pgalloc.h>
37#include <asm/cacheflush.h>
38#include <asm/cpu-regs.h>
39#include <asm/busctl-regs.h>
40#include <asm/unit/leds.h>
41#include <asm/fpu.h>
42#include <asm/gdb-stub.h>
43#include <asm/sections.h>
44
45#if (CONFIG_INTERRUPT_VECTOR_BASE & 0xffffff)
46#error "INTERRUPT_VECTOR_BASE not aligned to 16MiB boundary!"
47#endif
48
49struct pt_regs *__frame; /* current frame pointer */
50EXPORT_SYMBOL(__frame);
51
52int kstack_depth_to_print = 24;
53
54spinlock_t die_lock = __SPIN_LOCK_UNLOCKED(die_lock);
55
56ATOMIC_NOTIFIER_HEAD(mn10300_die_chain);
57
58/*
59 * These constants are for searching for possible module text
60 * segments. MODULE_RANGE is a guess of how much space is likely
61 * to be vmalloced.
62 */
63#define MODULE_RANGE (8 * 1024 * 1024)
64
65#define DO_ERROR(signr, prologue, str, name) \
66asmlinkage void name(struct pt_regs *regs, u32 intcode) \
67{ \
68 prologue; \
69 if (die_if_no_fixup(str, regs, intcode)) \
70 return; \
71 force_sig(signr, current); \
72}
73
74#define DO_EINFO(signr, prologue, str, name, sicode) \
75asmlinkage void name(struct pt_regs *regs, u32 intcode) \
76{ \
77 siginfo_t info; \
78 prologue; \
79 if (die_if_no_fixup(str, regs, intcode)) \
80 return; \
81 info.si_signo = signr; \
82 if (signr == SIGILL && sicode == ILL_ILLOPC) { \
83 uint8_t opcode; \
84 if (get_user(opcode, (uint8_t __user *)regs->pc) == 0) \
85 if (opcode == 0xff) \
86 info.si_signo = SIGTRAP; \
87 } \
88 info.si_errno = 0; \
89 info.si_code = sicode; \
90 info.si_addr = (void *) regs->pc; \
91 force_sig_info(info.si_signo, &info, current); \
92}
93
94DO_ERROR(SIGTRAP, {}, "trap", trap);
95DO_ERROR(SIGSEGV, {}, "ibreak", ibreak);
96DO_ERROR(SIGSEGV, {}, "obreak", obreak);
97DO_EINFO(SIGSEGV, {}, "access error", access_error, SEGV_ACCERR);
98DO_EINFO(SIGSEGV, {}, "insn access error", insn_acc_error, SEGV_ACCERR);
99DO_EINFO(SIGSEGV, {}, "data access error", data_acc_error, SEGV_ACCERR);
100DO_EINFO(SIGILL, {}, "privileged opcode", priv_op, ILL_PRVOPC);
101DO_EINFO(SIGILL, {}, "invalid opcode", invalid_op, ILL_ILLOPC);
102DO_EINFO(SIGILL, {}, "invalid ex opcode", invalid_exop, ILL_ILLOPC);
103DO_EINFO(SIGBUS, {}, "invalid address", mem_error, BUS_ADRERR);
104DO_EINFO(SIGBUS, {}, "bus error", bus_error, BUS_ADRERR);
105DO_EINFO(SIGILL, {}, "FPU invalid opcode", fpu_invalid_op, ILL_COPROC);
106
107DO_ERROR(SIGTRAP,
108#ifndef CONFIG_MN10300_USING_JTAG
109 DCR &= ~0x0001,
110#else
111 {},
112#endif
113 "single step", istep);
114
115/*
116 * handle NMI
117 */
118asmlinkage void nmi(struct pt_regs *regs, enum exception_code code)
119{
120 /* see if gdbstub wants to deal with it */
121#ifdef CONFIG_GDBSTUB
122 if (gdbstub_intercept(regs, code))
123 return;
124#endif
125
126 printk(KERN_WARNING "--- Register Dump ---\n");
127 show_registers(regs);
128 printk(KERN_WARNING "---------------------\n");
129}
130
131/*
132 * show a stack trace from the specified stack pointer
133 */
134void show_trace(unsigned long *sp)
135{
136 unsigned long *stack, addr, module_start, module_end;
137 int i;
138
139 printk(KERN_EMERG "\n"
140 KERN_EMERG "Call Trace:");
141
142 stack = sp;
143 i = 0;
144 module_start = VMALLOC_START;
145 module_end = VMALLOC_END;
146
147 while (((long) stack & (THREAD_SIZE - 1)) != 0) {
148 addr = *stack++;
149 if (__kernel_text_address(addr)) {
150#if 1
151 printk(" [<%08lx>]", addr);
152 print_symbol(" %s", addr);
153 printk("\n");
154#else
155 if ((i % 6) == 0)
156 printk("\n" KERN_EMERG " ");
157 printk("[<%08lx>] ", addr);
158 i++;
159#endif
160 }
161 }
162
163 printk("\n");
164}
165
166/*
167 * show the raw stack from the specified stack pointer
168 */
169void show_stack(struct task_struct *task, unsigned long *sp)
170{
171 unsigned long *stack;
172 int i;
173
174 if (!sp)
175 sp = (unsigned long *) &sp;
176
177 stack = sp;
178 printk(KERN_EMERG "Stack:");
179 for (i = 0; i < kstack_depth_to_print; i++) {
180 if (((long) stack & (THREAD_SIZE - 1)) == 0)
181 break;
182 if ((i % 8) == 0)
183 printk("\n" KERN_EMERG " ");
184 printk("%08lx ", *stack++);
185 }
186
187 show_trace(sp);
188}
189
190/*
191 * the architecture-independent dump_stack generator
192 */
193void dump_stack(void)
194{
195 unsigned long stack;
196
197 show_stack(current, &stack);
198}
199EXPORT_SYMBOL(dump_stack);
200
201/*
202 * dump the register file in the specified exception frame
203 */
204void show_registers_only(struct pt_regs *regs)
205{
206 unsigned long ssp;
207
208 ssp = (unsigned long) regs + sizeof(*regs);
209
210 printk(KERN_EMERG "PC: %08lx EPSW: %08lx SSP: %08lx mode: %s\n",
211 regs->pc, regs->epsw, ssp, user_mode(regs) ? "User" : "Super");
212 printk(KERN_EMERG "d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
213 regs->d0, regs->d1, regs->d2, regs->d3);
214 printk(KERN_EMERG "a0: %08lx a1: %08lx a2: %08lx a3: %08lx\n",
215 regs->a0, regs->a1, regs->a2, regs->a3);
216 printk(KERN_EMERG "e0: %08lx e1: %08lx e2: %08lx e3: %08lx\n",
217 regs->e0, regs->e1, regs->e2, regs->e3);
218 printk(KERN_EMERG "e4: %08lx e5: %08lx e6: %08lx e7: %08lx\n",
219 regs->e4, regs->e5, regs->e6, regs->e7);
220 printk(KERN_EMERG "lar: %08lx lir: %08lx mdr: %08lx usp: %08lx\n",
221 regs->lar, regs->lir, regs->mdr, regs->sp);
222 printk(KERN_EMERG "cvf: %08lx crl: %08lx crh: %08lx drq: %08lx\n",
223 regs->mcvf, regs->mcrl, regs->mcrh, regs->mdrq);
224 printk(KERN_EMERG "threadinfo=%p task=%p)\n",
225 current_thread_info(), current);
226
227 if ((unsigned long) current >= 0x90000000UL &&
228 (unsigned long) current < 0x94000000UL)
229 printk(KERN_EMERG "Process %s (pid: %d)\n",
230 current->comm, current->pid);
231
232 printk(KERN_EMERG "CPUP: %04hx\n", CPUP);
233 printk(KERN_EMERG "TBR: %08x\n", TBR);
234 printk(KERN_EMERG "DEAR: %08x\n", DEAR);
235 printk(KERN_EMERG "sISR: %08x\n", sISR);
236 printk(KERN_EMERG "NMICR: %04hx\n", NMICR);
237 printk(KERN_EMERG "BCBERR: %08x\n", BCBERR);
238 printk(KERN_EMERG "BCBEAR: %08x\n", BCBEAR);
239 printk(KERN_EMERG "MMUFCR: %08x\n", MMUFCR);
240 printk(KERN_EMERG "IPTEU : %08x IPTEL2: %08x\n", IPTEU, IPTEL2);
241 printk(KERN_EMERG "DPTEU: %08x DPTEL2: %08x\n", DPTEU, DPTEL2);
242}
243
244/*
245 * dump the registers and the stack
246 */
247void show_registers(struct pt_regs *regs)
248{
249 unsigned long sp;
250 int i;
251
252 show_registers_only(regs);
253
254 if (!user_mode(regs))
255 sp = (unsigned long) regs + sizeof(*regs);
256 else
257 sp = regs->sp;
258
259 /* when in-kernel, we also print out the stack and code at the
260 * time of the fault..
261 */
262 if (!user_mode(regs)) {
263 printk(KERN_EMERG "\n");
264 show_stack(current, (unsigned long *) sp);
265
266#if 0
267 printk(KERN_EMERG "\n"
268 KERN_EMERG "Code: ");
269 if (regs->pc < PAGE_OFFSET)
270 goto bad;
271
272 for (i = 0; i < 20; i++) {
273 unsigned char c;
274 if (__get_user(c, &((unsigned char *) regs->pc)[i]))
275 goto bad;
276 printk("%02x ", c);
277 }
278#else
279 i = 0;
280#endif
281 }
282
283 printk("\n");
284 return;
285
286#if 0
287bad:
288 printk(KERN_EMERG " Bad PC value.");
289 break;
290#endif
291}
292
293/*
294 *
295 */
296void show_trace_task(struct task_struct *tsk)
297{
298 unsigned long sp = tsk->thread.sp;
299
300 /* User space on another CPU? */
301 if ((sp ^ (unsigned long) tsk) & (PAGE_MASK << 1))
302 return;
303
304 show_trace((unsigned long *) sp);
305}
306
307/*
308 * note the untimely death of part of the kernel
309 */
310void die(const char *str, struct pt_regs *regs, enum exception_code code)
311{
312 console_verbose();
313 spin_lock_irq(&die_lock);
314 printk(KERN_EMERG "\n"
315 KERN_EMERG "%s: %04x\n",
316 str, code & 0xffff);
317 show_registers(regs);
318
319 if (regs->pc >= 0x02000000 && regs->pc < 0x04000000 &&
320 (regs->epsw & (EPSW_IM | EPSW_IE)) != (EPSW_IM | EPSW_IE)) {
321 printk(KERN_EMERG "Exception in usermode interrupt handler\n");
322 printk(KERN_EMERG "\n"
323 KERN_EMERG " Please connect to kernel debugger !!\n");
324 asm volatile ("0: bra 0b");
325 }
326
327 spin_unlock_irq(&die_lock);
328 do_exit(SIGSEGV);
329}
330
331/*
332 * see if there's a fixup handler we can force a jump to when an exception
333 * happens due to something kernel code did
334 */
335int die_if_no_fixup(const char *str, struct pt_regs *regs,
336 enum exception_code code)
337{
338 if (user_mode(regs))
339 return 0;
340
341 peripheral_leds_display_exception(code);
342
343 switch (code) {
344 /* see if we can fixup the kernel accessing memory */
345 case EXCEP_ITLBMISS:
346 case EXCEP_DTLBMISS:
347 case EXCEP_IAERROR:
348 case EXCEP_DAERROR:
349 case EXCEP_MEMERR:
350 case EXCEP_MISALIGN:
351 case EXCEP_BUSERROR:
352 case EXCEP_ILLDATACC:
353 case EXCEP_IOINSACC:
354 case EXCEP_PRIVINSACC:
355 case EXCEP_PRIVDATACC:
356 case EXCEP_DATINSACC:
357 if (fixup_exception(regs))
358 return 1;
359 case EXCEP_UNIMPINS:
360 if (regs->pc && *(uint8_t *)regs->pc == 0xff)
361 if (notify_die(DIE_BREAKPOINT, str, regs, code, 0, 0))
362 return 1;
363 break;
364 default:
365 break;
366 }
367
368 /* see if gdbstub wants to deal with it */
369#ifdef CONFIG_GDBSTUB
370 if (gdbstub_intercept(regs, code))
371 return 1;
372#endif
373
374 if (notify_die(DIE_GPF, str, regs, code, 0, 0))
375 return 1;
376
377 /* make the process die as the last resort */
378 die(str, regs, code);
379}
380
381/*
382 * handle unsupported syscall instructions (syscall 1-15)
383 */
384static asmlinkage void unsupported_syscall(struct pt_regs *regs,
385 enum exception_code code)
386{
387 struct task_struct *tsk = current;
388 siginfo_t info;
389
390 /* catch a kernel BUG() */
391 if (code == EXCEP_SYSCALL15 && !user_mode(regs)) {
392 if (report_bug(regs->pc, regs) == BUG_TRAP_TYPE_BUG) {
393#ifdef CONFIG_GDBSTUB
394 __gdbstub_bug_trap();
395#endif
396 }
397 }
398
399 regs->pc -= 2; /* syscall return addr is _after_ the instruction */
400
401 die_if_no_fixup("An unsupported syscall insn was used by the kernel\n",
402 regs, code);
403
404 info.si_signo = SIGILL;
405 info.si_errno = ENOSYS;
406 info.si_code = ILL_ILLTRP;
407 info.si_addr = (void *) regs->pc;
408 force_sig_info(SIGILL, &info, tsk);
409}
410
411/*
412 * display the register file when the stack pointer gets clobbered
413 */
414asmlinkage void do_double_fault(struct pt_regs *regs)
415{
416 struct task_struct *tsk = current;
417
418 strcpy(tsk->comm, "emergency tsk");
419 tsk->pid = 0;
420 console_verbose();
421 printk(KERN_EMERG "--- double fault ---\n");
422 show_registers(regs);
423}
424
425/*
426 * asynchronous bus error (external, usually I/O DMA)
427 */
428asmlinkage void io_bus_error(u32 bcberr, u32 bcbear, struct pt_regs *regs)
429{
430 console_verbose();
431
432 printk(KERN_EMERG "\n"
433 KERN_EMERG "Asynchronous I/O Bus Error\n"
434 KERN_EMERG "==========================\n");
435
436 if (bcberr & BCBERR_BEME)
437 printk(KERN_EMERG "- Multiple recorded errors\n");
438
439 printk(KERN_EMERG "- Faulting Buses:%s%s%s\n",
440 bcberr & BCBERR_BEMR_CI ? " CPU-Ins-Fetch" : "",
441 bcberr & BCBERR_BEMR_CD ? " CPU-Data" : "",
442 bcberr & BCBERR_BEMR_DMA ? " DMA" : "");
443
444 printk(KERN_EMERG "- %s %s access made to %s at address %08x\n",
445 bcberr & BCBERR_BEBST ? "Burst" : "Single",
446 bcberr & BCBERR_BERW ? "Read" : "Write",
447 bcberr & BCBERR_BESB_MON ? "Monitor Space" :
448 bcberr & BCBERR_BESB_IO ? "Internal CPU I/O Space" :
449 bcberr & BCBERR_BESB_EX ? "External I/O Bus" :
450 bcberr & BCBERR_BESB_OPEX ? "External Memory Bus" :
451 "On Chip Memory",
452 bcbear
453 );
454
455 printk(KERN_EMERG "- Detected by the %s\n",
456 bcberr&BCBERR_BESD ? "Bus Control Unit" : "Slave Bus");
457
458#ifdef CONFIG_PCI
459#define BRIDGEREGB(X) (*(volatile __u8 *)(0xBE040000 + (X)))
460#define BRIDGEREGW(X) (*(volatile __u16 *)(0xBE040000 + (X)))
461#define BRIDGEREGL(X) (*(volatile __u32 *)(0xBE040000 + (X)))
462
463 printk(KERN_EMERG "- PCI Memory Paging Reg: %08x\n",
464 *(volatile __u32 *) (0xBFFFFFF4));
465 printk(KERN_EMERG "- PCI Bridge Base Address 0: %08x\n",
466 BRIDGEREGL(PCI_BASE_ADDRESS_0));
467 printk(KERN_EMERG "- PCI Bridge AMPCI Base Address: %08x\n",
468 BRIDGEREGL(0x48));
469 printk(KERN_EMERG "- PCI Bridge Command: %04hx\n",
470 BRIDGEREGW(PCI_COMMAND));
471 printk(KERN_EMERG "- PCI Bridge Status: %04hx\n",
472 BRIDGEREGW(PCI_STATUS));
473 printk(KERN_EMERG "- PCI Bridge Int Status: %08hx\n",
474 BRIDGEREGL(0x4c));
475#endif
476
477 printk(KERN_EMERG "\n");
478 show_registers(regs);
479
480 panic("Halted due to asynchronous I/O Bus Error\n");
481}
482
483/*
484 * handle an exception for which a handler has not yet been installed
485 */
486asmlinkage void uninitialised_exception(struct pt_regs *regs,
487 enum exception_code code)
488{
489
490 /* see if gdbstub wants to deal with it */
491#ifdef CONFIG_GDBSTUB
492 if (gdbstub_intercept(regs, code))
493 return;
494#endif
495
496 peripheral_leds_display_exception(code);
497 printk(KERN_EMERG "Uninitialised Exception 0x%04x\n", code & 0xFFFF);
498 show_registers(regs);
499
500 for (;;)
501 continue;
502}
503
504/*
505 * set an interrupt stub to jump to a handler
506 * ! NOTE: this does *not* flush the caches
507 */
508void __init __set_intr_stub(enum exception_code code, void *handler)
509{
510 unsigned long addr;
511 u8 *vector = (u8 *)(CONFIG_INTERRUPT_VECTOR_BASE + code);
512
513 addr = (unsigned long) handler - (unsigned long) vector;
514 vector[0] = 0xdc; /* JMP handler */
515 vector[1] = addr;
516 vector[2] = addr >> 8;
517 vector[3] = addr >> 16;
518 vector[4] = addr >> 24;
519 vector[5] = 0xcb;
520 vector[6] = 0xcb;
521 vector[7] = 0xcb;
522}
523
524/*
525 * set an interrupt stub to jump to a handler
526 */
527void __init set_intr_stub(enum exception_code code, void *handler)
528{
529 unsigned long addr;
530 u8 *vector = (u8 *)(CONFIG_INTERRUPT_VECTOR_BASE + code);
531
532 addr = (unsigned long) handler - (unsigned long) vector;
533 vector[0] = 0xdc; /* JMP handler */
534 vector[1] = addr;
535 vector[2] = addr >> 8;
536 vector[3] = addr >> 16;
537 vector[4] = addr >> 24;
538 vector[5] = 0xcb;
539 vector[6] = 0xcb;
540 vector[7] = 0xcb;
541
542 mn10300_dcache_flush_inv();
543 mn10300_icache_inv();
544}
545
546/*
547 * set an interrupt stub to invoke the JTAG unit and then jump to a handler
548 */
549void __init set_jtag_stub(enum exception_code code, void *handler)
550{
551 unsigned long addr;
552 u8 *vector = (u8 *)(CONFIG_INTERRUPT_VECTOR_BASE + code);
553
554 addr = (unsigned long) handler - ((unsigned long) vector + 1);
555 vector[0] = 0xff; /* PI to jump into JTAG debugger */
556 vector[1] = 0xdc; /* jmp handler */
557 vector[2] = addr;
558 vector[3] = addr >> 8;
559 vector[4] = addr >> 16;
560 vector[5] = addr >> 24;
561 vector[6] = 0xcb;
562 vector[7] = 0xcb;
563
564 mn10300_dcache_flush_inv();
565 flush_icache_range((unsigned long) vector, (unsigned long) vector + 8);
566}
567
568/*
569 * initialise the exception table
570 */
571void __init trap_init(void)
572{
573 set_excp_vector(EXCEP_TRAP, trap);
574 set_excp_vector(EXCEP_ISTEP, istep);
575 set_excp_vector(EXCEP_IBREAK, ibreak);
576 set_excp_vector(EXCEP_OBREAK, obreak);
577
578 set_excp_vector(EXCEP_PRIVINS, priv_op);
579 set_excp_vector(EXCEP_UNIMPINS, invalid_op);
580 set_excp_vector(EXCEP_UNIMPEXINS, invalid_exop);
581 set_excp_vector(EXCEP_MEMERR, mem_error);
582 set_excp_vector(EXCEP_MISALIGN, misalignment);
583 set_excp_vector(EXCEP_BUSERROR, bus_error);
584 set_excp_vector(EXCEP_ILLINSACC, insn_acc_error);
585 set_excp_vector(EXCEP_ILLDATACC, data_acc_error);
586 set_excp_vector(EXCEP_IOINSACC, insn_acc_error);
587 set_excp_vector(EXCEP_PRIVINSACC, insn_acc_error);
588 set_excp_vector(EXCEP_PRIVDATACC, data_acc_error);
589 set_excp_vector(EXCEP_DATINSACC, insn_acc_error);
590 set_excp_vector(EXCEP_FPU_DISABLED, fpu_disabled);
591 set_excp_vector(EXCEP_FPU_UNIMPINS, fpu_invalid_op);
592 set_excp_vector(EXCEP_FPU_OPERATION, fpu_exception);
593
594 set_excp_vector(EXCEP_NMI, nmi);
595
596 set_excp_vector(EXCEP_SYSCALL1, unsupported_syscall);
597 set_excp_vector(EXCEP_SYSCALL2, unsupported_syscall);
598 set_excp_vector(EXCEP_SYSCALL3, unsupported_syscall);
599 set_excp_vector(EXCEP_SYSCALL4, unsupported_syscall);
600 set_excp_vector(EXCEP_SYSCALL5, unsupported_syscall);
601 set_excp_vector(EXCEP_SYSCALL6, unsupported_syscall);
602 set_excp_vector(EXCEP_SYSCALL7, unsupported_syscall);
603 set_excp_vector(EXCEP_SYSCALL8, unsupported_syscall);
604 set_excp_vector(EXCEP_SYSCALL9, unsupported_syscall);
605 set_excp_vector(EXCEP_SYSCALL10, unsupported_syscall);
606 set_excp_vector(EXCEP_SYSCALL11, unsupported_syscall);
607 set_excp_vector(EXCEP_SYSCALL12, unsupported_syscall);
608 set_excp_vector(EXCEP_SYSCALL13, unsupported_syscall);
609 set_excp_vector(EXCEP_SYSCALL14, unsupported_syscall);
610 set_excp_vector(EXCEP_SYSCALL15, unsupported_syscall);
611}
612
613/*
614 * determine if a program counter value is a valid bug address
615 */
616int is_valid_bugaddr(unsigned long pc)
617{
618 return pc >= PAGE_OFFSET;
619}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-19 23:09:21 -0500