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/interrupt.h>
18 #include <linux/seq_file.h>
20 #include <asm/ptrace.h>
21 #include <asm/system.h>
23 #include <asm/traps.h>
25 static irqreturn_t mvme147_defhand (int irq, void *dev_id, struct pt_regs *fp);
28 * This should ideally be 4 elements only, for speed.
32 irqreturn_t (*handler)(int, void *, struct pt_regs *);
40 * void mvme147_init_IRQ (void)
46 * This function is called during kernel startup to initialize
47 * the mvme147 IRQ handling routines.
50 void mvme147_init_IRQ (void)
54 for (i = 0; i < 256; i++) {
55 irq_tab[i].handler = mvme147_defhand;
56 irq_tab[i].flags = IRQ_FLG_STD;
57 irq_tab[i].dev_id = NULL;
58 irq_tab[i].devname = NULL;
63 int mvme147_request_irq(unsigned int irq,
64 irqreturn_t (*handler)(int, void *, struct pt_regs *),
65 unsigned long flags, const char *devname, void *dev_id)
68 printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname);
71 if (!(irq_tab[irq].flags & IRQ_FLG_STD)) {
72 if (irq_tab[irq].flags & IRQ_FLG_LOCK) {
73 printk("%s: IRQ %d from %s is not replaceable\n",
74 __FUNCTION__, irq, irq_tab[irq].devname);
77 if (flags & IRQ_FLG_REPLACE) {
78 printk("%s: %s can't replace IRQ %d from %s\n",
79 __FUNCTION__, devname, irq, irq_tab[irq].devname);
83 irq_tab[irq].handler = handler;
84 irq_tab[irq].flags = flags;
85 irq_tab[irq].dev_id = dev_id;
86 irq_tab[irq].devname = devname;
90 void mvme147_free_irq(unsigned int irq, void *dev_id)
93 printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
96 if (irq_tab[irq].dev_id != dev_id)
97 printk("%s: Removing probably wrong IRQ %d from %s\n",
98 __FUNCTION__, irq, irq_tab[irq].devname);
100 irq_tab[irq].handler = mvme147_defhand;
101 irq_tab[irq].flags = IRQ_FLG_STD;
102 irq_tab[irq].dev_id = NULL;
103 irq_tab[irq].devname = NULL;
106 irqreturn_t mvme147_process_int (unsigned long vec, struct pt_regs *fp)
109 printk ("mvme147_process_int: Illegal vector %ld\n", vec);
112 irq_tab[vec].count++;
113 irq_tab[vec].handler(vec, irq_tab[vec].dev_id, fp);
118 int show_mvme147_interrupts (struct seq_file *p, void *v)
122 for (i = 0; i < 256; i++) {
123 if (irq_tab[i].count)
124 seq_printf(p, "Vec 0x%02x: %8d %s\n",
126 irq_tab[i].devname ? irq_tab[i].devname : "free");
132 static irqreturn_t mvme147_defhand (int irq, void *dev_id, struct pt_regs *fp)
134 printk ("Unknown interrupt 0x%02x\n", irq);
138 void mvme147_enable_irq (unsigned int irq)
143 void mvme147_disable_irq (unsigned int irq)