2 * arch/m68k/mvme147/147ints.c
4 * Copyright (C) 1997 Richard Hirst [richard@sleepie.demon.co.uk]
6 * based on amiints.c -- Amiga Linux interrupt handling code
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file README.legal in the main directory of this archive
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/seq_file.h>
19 #include <asm/ptrace.h>
20 #include <asm/system.h>
22 #include <asm/traps.h>
24 static irqreturn_t mvme147_defhand (int irq, void *dev_id, struct pt_regs *fp);
27 * This should ideally be 4 elements only, for speed.
31 irqreturn_t (*handler)(int, void *, struct pt_regs *);
39 * void mvme147_init_IRQ (void)
45 * This function is called during kernel startup to initialize
46 * the mvme147 IRQ handling routines.
49 void mvme147_init_IRQ (void)
53 for (i = 0; i < 256; i++) {
54 irq_tab[i].handler = mvme147_defhand;
55 irq_tab[i].flags = IRQ_FLG_STD;
56 irq_tab[i].dev_id = NULL;
57 irq_tab[i].devname = NULL;
62 int mvme147_request_irq(unsigned int irq,
63 irqreturn_t (*handler)(int, void *, struct pt_regs *),
64 unsigned long flags, const char *devname, void *dev_id)
67 printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname);
70 if (!(irq_tab[irq].flags & IRQ_FLG_STD)) {
71 if (irq_tab[irq].flags & IRQ_FLG_LOCK) {
72 printk("%s: IRQ %d from %s is not replaceable\n",
73 __FUNCTION__, irq, irq_tab[irq].devname);
76 if (flags & IRQ_FLG_REPLACE) {
77 printk("%s: %s can't replace IRQ %d from %s\n",
78 __FUNCTION__, devname, irq, irq_tab[irq].devname);
82 irq_tab[irq].handler = handler;
83 irq_tab[irq].flags = flags;
84 irq_tab[irq].dev_id = dev_id;
85 irq_tab[irq].devname = devname;
89 void mvme147_free_irq(unsigned int irq, void *dev_id)
92 printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
95 if (irq_tab[irq].dev_id != dev_id)
96 printk("%s: Removing probably wrong IRQ %d from %s\n",
97 __FUNCTION__, irq, irq_tab[irq].devname);
99 irq_tab[irq].handler = mvme147_defhand;
100 irq_tab[irq].flags = IRQ_FLG_STD;
101 irq_tab[irq].dev_id = NULL;
102 irq_tab[irq].devname = NULL;
105 irqreturn_t mvme147_process_int (unsigned long vec, struct pt_regs *fp)
108 printk ("mvme147_process_int: Illegal vector %ld\n", vec);
111 irq_tab[vec].count++;
112 irq_tab[vec].handler(vec, irq_tab[vec].dev_id, fp);
117 int show_mvme147_interrupts (struct seq_file *p, void *v)
121 for (i = 0; i < 256; i++) {
122 if (irq_tab[i].count)
123 seq_printf(p, "Vec 0x%02x: %8d %s\n",
125 irq_tab[i].devname ? irq_tab[i].devname : "free");
131 static irqreturn_t mvme147_defhand (int irq, void *dev_id, struct pt_regs *fp)
133 printk ("Unknown interrupt 0x%02x\n", irq);
137 void mvme147_enable_irq (unsigned int irq)
142 void mvme147_disable_irq (unsigned int irq)