2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Code to handle x86 style IRQs plus some generic interrupt stuff.
8 * Copyright (C) 1992 Linus Torvalds
9 * Copyright (C) 1994 - 2000 Ralf Baechle
11 #include <linux/config.h>
12 #include <linux/kernel.h>
13 #include <linux/delay.h>
14 #include <linux/init.h>
15 #include <linux/interrupt.h>
16 #include <linux/kernel_stat.h>
17 #include <linux/module.h>
18 #include <linux/proc_fs.h>
19 #include <linux/slab.h>
21 #include <linux/random.h>
22 #include <linux/sched.h>
23 #include <linux/seq_file.h>
24 #include <linux/kallsyms.h>
26 #include <asm/atomic.h>
27 #include <asm/system.h>
28 #include <asm/uaccess.h>
31 * 'what should we do if we get a hw irq event on an illegal vector'.
32 * each architecture has to answer this themselves.
34 void ack_bad_irq(unsigned int irq)
36 printk("unexpected IRQ # %d\n", irq);
39 atomic_t irq_err_count;
44 * do_IRQ handles all normal device IRQ's (the special
45 * SMP cross-CPU interrupts have their own specific
48 asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs)
60 * Generic, controller-independent functions:
63 int show_interrupts(struct seq_file *p, void *v)
65 int i = *(loff_t *) v, j;
66 struct irqaction * action;
71 for_each_online_cpu(j)
72 seq_printf(p, "CPU%d ",j);
77 spin_lock_irqsave(&irq_desc[i].lock, flags);
78 action = irq_desc[i].action;
81 seq_printf(p, "%3d: ",i);
83 seq_printf(p, "%10u ", kstat_irqs(i));
85 for_each_online_cpu(j)
86 seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
88 seq_printf(p, " %14s", irq_desc[i].handler->typename);
89 seq_printf(p, " %s", action->name);
91 for (action=action->next; action; action = action->next)
92 seq_printf(p, ", %s", action->name);
96 spin_unlock_irqrestore(&irq_desc[i].lock, flags);
97 } else if (i == NR_IRQS) {
99 seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
105 extern void breakpoint(void);
106 extern void set_debug_traps(void);
108 static int kgdb_flag = 1;
109 static int __init nokgdb(char *str)
114 __setup("nokgdb", nokgdb);
117 void __init init_IRQ(void)
121 for (i = 0; i < NR_IRQS; i++) {
122 irq_desc[i].status = IRQ_DISABLED;
123 irq_desc[i].action = NULL;
124 irq_desc[i].depth = 1;
125 irq_desc[i].handler = &no_irq_type;
126 spin_lock_init(&irq_desc[i].lock);
133 printk("Wait for gdb client connection ...\n");