124 строки
3.1 KiB
C
124 строки
3.1 KiB
C
/*
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* arch/v850/kernel/irq.c -- High-level interrupt handling
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*
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* Copyright (C) 2001,02,03,04,05 NEC Electronics Corporation
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* Copyright (C) 2001,02,03,04,05 Miles Bader <miles@gnu.org>
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* Copyright (C) 1994-2000 Ralf Baechle
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* Copyright (C) 1992 Linus Torvalds
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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*
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* This file was was derived from the mips version, arch/mips/kernel/irq.c
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/irq.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel_stat.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/random.h>
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#include <linux/seq_file.h>
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#include <asm/system.h>
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/*
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* 'what should we do if we get a hw irq event on an illegal vector'.
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* each architecture has to answer this themselves, it doesn't deserve
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* a generic callback i think.
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*/
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void ack_bad_irq(unsigned int irq)
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{
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printk("received IRQ %d with unknown interrupt type\n", irq);
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}
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volatile unsigned long irq_err_count, spurious_count;
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/*
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* Generic, controller-independent functions:
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*/
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int show_interrupts(struct seq_file *p, void *v)
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{
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int irq = *(loff_t *) v;
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if (irq == 0) {
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int cpu;
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seq_puts(p, " ");
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for (cpu=0; cpu < 1 /*smp_num_cpus*/; cpu++)
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seq_printf(p, "CPU%d ", cpu);
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seq_putc(p, '\n');
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}
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if (irq < NR_IRQS) {
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unsigned long flags;
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struct irqaction *action;
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spin_lock_irqsave(&irq_desc[irq].lock, flags);
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action = irq_desc[irq].action;
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if (action) {
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int j;
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int count = 0;
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int num = -1;
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const char *type_name = irq_desc[irq].chip->typename;
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for (j = 0; j < NR_IRQS; j++)
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if (irq_desc[j].chip->typename == type_name){
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if (irq == j)
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num = count;
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count++;
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}
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seq_printf(p, "%3d: ",irq);
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seq_printf(p, "%10u ", kstat_irqs(irq));
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if (count > 1) {
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int prec = (num >= 100 ? 3 : num >= 10 ? 2 : 1);
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seq_printf(p, " %*s%d", 14 - prec,
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type_name, num);
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} else
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seq_printf(p, " %14s", type_name);
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seq_printf(p, " %s", action->name);
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for (action=action->next; action; action = action->next)
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seq_printf(p, ", %s", action->name);
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seq_putc(p, '\n');
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}
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spin_unlock_irqrestore(&irq_desc[irq].lock, flags);
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} else if (irq == NR_IRQS)
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seq_printf(p, "ERR: %10lu\n", irq_err_count);
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return 0;
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}
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/* Handle interrupt IRQ. REGS are the registers at the time of ther
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interrupt. */
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unsigned int handle_irq (int irq, struct pt_regs *regs)
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{
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irq_enter();
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__do_IRQ(irq, regs);
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irq_exit();
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return 1;
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}
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/* Initialize irq handling for IRQs.
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BASE_IRQ, BASE_IRQ+INTERVAL, ..., BASE_IRQ+NUM*INTERVAL
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to IRQ_TYPE. An IRQ_TYPE of 0 means to use a generic interrupt type. */
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void __init
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init_irq_handlers (int base_irq, int num, int interval,
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struct hw_interrupt_type *irq_type)
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{
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while (num-- > 0) {
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irq_desc[base_irq].status = IRQ_DISABLED;
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irq_desc[base_irq].action = NULL;
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irq_desc[base_irq].depth = 1;
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irq_desc[base_irq].chip = irq_type;
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base_irq += interval;
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}
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}
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