]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * | |
3 | * linux/arch/cris/kernel/irq.c | |
4 | * | |
eb2746dd | 5 | * Copyright (c) 2000,2007 Axis Communications AB |
1da177e4 LT |
6 | * |
7 | * Authors: Bjorn Wesen (bjornw@axis.com) | |
8 | * | |
9 | * This file contains the code used by various IRQ handling routines: | |
49b4ff33 | 10 | * asking for different IRQs should be done through these routines |
1da177e4 LT |
11 | * instead of just grabbing them. Thus setups with different IRQ numbers |
12 | * shouldn't result in any weird surprises, and installing new handlers | |
13 | * should be easier. | |
14 | * | |
1da177e4 LT |
15 | */ |
16 | ||
17 | /* | |
49b4ff33 | 18 | * IRQs are in fact implemented a bit like signal handlers for the kernel. |
1da177e4 LT |
19 | * Naturally it's not a 1:1 relation, but there are similarities. |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/module.h> |
23 | #include <linux/ptrace.h> | |
2e0cea1d | 24 | #include <linux/irq.h> |
1da177e4 LT |
25 | |
26 | #include <linux/kernel_stat.h> | |
27 | #include <linux/signal.h> | |
28 | #include <linux/sched.h> | |
29 | #include <linux/ioport.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/timex.h> | |
1da177e4 LT |
32 | #include <linux/random.h> |
33 | #include <linux/init.h> | |
34 | #include <linux/seq_file.h> | |
35 | #include <linux/errno.h> | |
2e0cea1d | 36 | #include <linux/spinlock.h> |
1da177e4 LT |
37 | |
38 | #include <asm/io.h> | |
b1a154db | 39 | #include <arch/system.h> |
1da177e4 | 40 | |
1da177e4 | 41 | /* called by the assembler IRQ entry functions defined in irq.h |
49b4ff33 | 42 | * to dispatch the interrupts to registered handlers |
1da177e4 LT |
43 | */ |
44 | ||
45 | asmlinkage void do_IRQ(int irq, struct pt_regs * regs) | |
46 | { | |
2e0cea1d | 47 | unsigned long sp; |
eb2746dd | 48 | struct pt_regs *old_regs = set_irq_regs(regs); |
2e0cea1d MS |
49 | irq_enter(); |
50 | sp = rdsp(); | |
51 | if (unlikely((sp & (PAGE_SIZE - 1)) < (PAGE_SIZE/8))) { | |
52 | printk("do_IRQ: stack overflow: %lX\n", sp); | |
53 | show_stack(NULL, (unsigned long *)sp); | |
1da177e4 | 54 | } |
c84077ac TG |
55 | generic_handle_irq(irq); |
56 | irq_exit(); | |
eb2746dd | 57 | set_irq_regs(old_regs); |
1da177e4 LT |
58 | } |
59 | ||
1da177e4 LT |
60 | void weird_irq(void) |
61 | { | |
62 | local_irq_disable(); | |
63 | printk("weird irq\n"); | |
64 | while(1); | |
65 | } | |
66 |