tick/idle/powerpc: Do not register idle states with CPUIDLE_FLAG_TIMER_STOP set in...
[linux/fpc-iii.git] / arch / microblaze / kernel / traps.c
blobcb619533a19270bcb12f326188149dc055bccfd7
1 /*
2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2007-2009 PetaLogix
4 * Copyright (C) 2006 Atmark Techno, Inc.
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
11 #include <linux/export.h>
12 #include <linux/kernel.h>
13 #include <linux/kallsyms.h>
14 #include <linux/sched.h>
15 #include <linux/debug_locks.h>
17 #include <asm/exceptions.h>
18 #include <asm/unwind.h>
20 void trap_init(void)
22 __enable_hw_exceptions();
25 static unsigned long kstack_depth_to_print; /* 0 == entire stack */
27 static int __init kstack_setup(char *s)
29 return !kstrtoul(s, 0, &kstack_depth_to_print);
31 __setup("kstack=", kstack_setup);
33 void show_stack(struct task_struct *task, unsigned long *sp)
35 unsigned long words_to_show;
36 u32 fp = (u32) sp;
38 if (fp == 0) {
39 if (task) {
40 fp = ((struct thread_info *)
41 (task->stack))->cpu_context.r1;
42 } else {
43 /* Pick up caller of dump_stack() */
44 fp = (u32)&sp - 8;
48 words_to_show = (THREAD_SIZE - (fp & (THREAD_SIZE - 1))) >> 2;
49 if (kstack_depth_to_print && (words_to_show > kstack_depth_to_print))
50 words_to_show = kstack_depth_to_print;
52 pr_info("Kernel Stack:\n");
55 * Make the first line an 'odd' size if necessary to get
56 * remaining lines to start at an address multiple of 0x10
58 if (fp & 0xF) {
59 unsigned long line1_words = (0x10 - (fp & 0xF)) >> 2;
60 if (line1_words < words_to_show) {
61 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 32,
62 4, (void *)fp, line1_words << 2, 0);
63 fp += line1_words << 2;
64 words_to_show -= line1_words;
67 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 32, 4, (void *)fp,
68 words_to_show << 2, 0);
69 pr_info("\n\nCall Trace:\n");
70 microblaze_unwind(task, NULL);
71 pr_info("\n");
73 if (!task)
74 task = current;
76 debug_show_held_locks(task);