diff options
Diffstat (limited to 'arch/cris/kernel/irq.c')
| -rw-r--r-- | arch/cris/kernel/irq.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/cris/kernel/irq.c b/arch/cris/kernel/irq.c new file mode 100644 index 000000000..dd0be5de5 --- /dev/null +++ b/arch/cris/kernel/irq.c @@ -0,0 +1,66 @@ +/* + * + * linux/arch/cris/kernel/irq.c + * + * Copyright (c) 2000,2007 Axis Communications AB + * + * Authors: Bjorn Wesen (bjornw@axis.com) + * + * This file contains the code used by various IRQ handling routines: + * asking for different IRQs should be done through these routines + * instead of just grabbing them. Thus setups with different IRQ numbers + * shouldn't result in any weird surprises, and installing new handlers + * should be easier. + * + */ + +/* + * IRQs are in fact implemented a bit like signal handlers for the kernel. + * Naturally it's not a 1:1 relation, but there are similarities. + */ + +#include <linux/module.h> +#include <linux/ptrace.h> +#include <linux/irq.h> + +#include <linux/kernel_stat.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/timex.h> +#include <linux/random.h> +#include <linux/init.h> +#include <linux/seq_file.h> +#include <linux/errno.h> +#include <linux/spinlock.h> + +#include <asm/io.h> +#include <arch/system.h> + +/* called by the assembler IRQ entry functions defined in irq.h + * to dispatch the interrupts to registered handlers + */ + +asmlinkage void do_IRQ(int irq, struct pt_regs * regs) +{ + unsigned long sp; + struct pt_regs *old_regs = set_irq_regs(regs); + irq_enter(); + sp = rdsp(); + if (unlikely((sp & (PAGE_SIZE - 1)) < (PAGE_SIZE/8))) { + printk("do_IRQ: stack overflow: %lX\n", sp); + show_stack(NULL, (unsigned long *)sp); + } + generic_handle_irq(irq); + irq_exit(); + set_irq_regs(old_regs); +} + +void weird_irq(void) +{ + local_irq_disable(); + printk("weird irq\n"); + while(1); +} + |