diff options
Diffstat (limited to 'arch/sh64/kernel/irq.c')
| -rw-r--r-- | arch/sh64/kernel/irq.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/sh64/kernel/irq.c b/arch/sh64/kernel/irq.c new file mode 100644 index 000000000000..9fc2b71dbd84 --- /dev/null +++ b/arch/sh64/kernel/irq.c @@ -0,0 +1,116 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/irq.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003 Paul Mundt + * + */ + +/* + * 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/config.h> +#include <linux/errno.h> +#include <linux/kernel_stat.h> +#include <linux/signal.h> +#include <linux/rwsem.h> +#include <linux/sched.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/timex.h> +#include <linux/slab.h> +#include <linux/random.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/init.h> +#include <linux/seq_file.h> +#include <linux/bitops.h> +#include <asm/system.h> +#include <asm/io.h> +#include <asm/smp.h> +#include <asm/pgalloc.h> +#include <asm/delay.h> +#include <asm/irq.h> +#include <linux/irq.h> + +void ack_bad_irq(unsigned int irq) +{ + printk("unexpected IRQ trap at irq %02x\n", irq); +} + +#if defined(CONFIG_PROC_FS) +int show_interrupts(struct seq_file *p, void *v) +{ + int i = *(loff_t *) v, j; + struct irqaction * action; + unsigned long flags; + + if (i == 0) { + seq_puts(p, " "); + for (j=0; j<NR_CPUS; j++) + if (cpu_online(j)) + seq_printf(p, "CPU%d ",j); + seq_putc(p, '\n'); + } + + if (i < NR_IRQS) { + spin_lock_irqsave(&irq_desc[i].lock, flags); + action = irq_desc[i].action; + if (!action) + goto unlock; + seq_printf(p, "%3d: ",i); + seq_printf(p, "%10u ", kstat_irqs(i)); + seq_printf(p, " %14s", irq_desc[i].handler->typename); + seq_printf(p, " %s", action->name); + + for (action=action->next; action; action = action->next) + seq_printf(p, ", %s", action->name); + seq_putc(p, '\n'); +unlock: + spin_unlock_irqrestore(&irq_desc[i].lock, flags); + } + return 0; +} +#endif + +/* + * do_NMI handles all Non-Maskable Interrupts. + */ +asmlinkage void do_NMI(unsigned long vector_num, struct pt_regs * regs) +{ + if (regs->sr & 0x40000000) + printk("unexpected NMI trap in system mode\n"); + else + printk("unexpected NMI trap in user mode\n"); + + /* No statistics */ +} + +/* + * do_IRQ handles all normal device IRQ's. + */ +asmlinkage int do_IRQ(unsigned long vector_num, struct pt_regs * regs) +{ + int irq; + + irq_enter(); + + irq = irq_demux(vector_num); + + if (irq >= 0) { + __do_IRQ(irq, regs); + } else { + printk("unexpected IRQ trap at vector %03lx\n", vector_num); + } + + irq_exit(); + + return 1; +} + |
