71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/*
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*
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* linux/arch/cris/kernel/irq.c
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*
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* Copyright (c) 2000,2007 Axis Communications AB
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*
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* Authors: Bjorn Wesen (bjornw@axis.com)
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*
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* This file contains the code used by various IRQ handling routines:
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* asking for different IRQs should be done through these routines
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* instead of just grabbing them. Thus setups with different IRQ numbers
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* shouldn't result in any weird surprises, and installing new handlers
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* should be easier.
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*
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*/
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/*
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* IRQs are in fact implemented a bit like signal handlers for the kernel.
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* Naturally it's not a 1:1 relation, but there are similarities.
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*/
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#include <linux/module.h>
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#include <linux/ptrace.h>
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#include <linux/irq.h>
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#include <linux/kernel_stat.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/ioport.h>
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#include <linux/interrupt.h>
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#include <linux/timex.h>
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#include <linux/random.h>
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#include <linux/init.h>
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#include <linux/seq_file.h>
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#include <linux/errno.h>
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#include <linux/spinlock.h>
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#include <asm/io.h>
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#include <arch/system.h>
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/* called by the assembler IRQ entry functions defined in irq.h
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* to dispatch the interrupts to registered handlers
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*/
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asmlinkage void do_IRQ(int irq, struct pt_regs * regs)
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{
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unsigned long sp;
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struct pt_regs *old_regs;
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trace_hardirqs_off();
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old_regs = set_irq_regs(regs);
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irq_enter();
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sp = rdsp();
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if (unlikely((sp & (PAGE_SIZE - 1)) < (PAGE_SIZE/8))) {
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printk("do_IRQ: stack overflow: %lX\n", sp);
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show_stack(NULL, (unsigned long *)sp);
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}
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generic_handle_irq(irq);
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irq_exit();
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set_irq_regs(old_regs);
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}
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void weird_irq(void)
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{
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local_irq_disable();
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printk("weird irq\n");
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while(1);
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}
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