2 * arch/m68k/mvme16x/16xints.c
4 * Copyright (C) 1995 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>
18 #include <asm/system.h>
19 #include <asm/ptrace.h>
22 static void mvme16x_defhand (int irq, void *dev_id, struct pt_regs *fp);
25 * This should ideally be 4 elements only, for speed.
29 void (*handler)(int, void *, struct pt_regs *);
37 * void mvme16x_init_IRQ (void)
43 * This function is called during kernel startup to initialize
44 * the mvme16x IRQ handling routines. Should probably ensure
45 * that the base vectors for the VMEChip2 and PCCChip2 are valid.
48 void mvme16x_init_IRQ (void)
52 for (i = 0; i < 192; i++) {
53 irq_tab[i].handler = mvme16x_defhand;
54 irq_tab[i].flags = IRQ_FLG_STD;
55 irq_tab[i].dev_id = NULL;
56 irq_tab[i].devname = NULL;
61 int mvme16x_request_irq(unsigned int irq,
62 void (*handler)(int, void *, struct pt_regs *),
63 unsigned long flags, const char *devname, void *dev_id)
65 if (irq < 64 || irq > 255) {
66 printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname);
70 if (!(irq_tab[irq-64].flags & IRQ_FLG_STD)) {
71 if (irq_tab[irq-64].flags & IRQ_FLG_LOCK) {
72 printk("%s: IRQ %d from %s is not replaceable\n",
73 __FUNCTION__, irq, irq_tab[irq-64].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-64].devname);
82 irq_tab[irq-64].handler = handler;
83 irq_tab[irq-64].flags = flags;
84 irq_tab[irq-64].dev_id = dev_id;
85 irq_tab[irq-64].devname = devname;
89 void mvme16x_free_irq(unsigned int irq, void *dev_id)
91 if (irq < 64 || irq > 255) {
92 printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
96 if (irq_tab[irq-64].dev_id != dev_id)
97 printk("%s: Removing probably wrong IRQ %d from %s\n",
98 __FUNCTION__, irq, irq_tab[irq-64].devname);
100 irq_tab[irq-64].handler = mvme16x_defhand;;
101 irq_tab[irq-64].flags = IRQ_FLG_STD;
102 irq_tab[irq-64].dev_id = NULL;
103 irq_tab[irq-64].devname = NULL;
106 void mvme16x_process_int (unsigned long vec, struct pt_regs *fp)
108 if (vec < 64 || vec > 255)
109 printk ("mvme16x_process_int: Illegal vector %ld", vec);
112 irq_tab[vec-64].count++;
113 irq_tab[vec-64].handler(vec, irq_tab[vec-64].dev_id, fp);
117 int mvme16x_get_irq_list (char *buf)
121 for (i = 0; i < 192; i++) {
122 if (irq_tab[i].count)
123 len += sprintf (buf+len, "Vec 0x%02x: %8d %s\n",
124 i+64, irq_tab[i].count,
125 irq_tab[i].devname ? irq_tab[i].devname : "free");
131 static void mvme16x_defhand (int irq, void *dev_id, struct pt_regs *fp)
133 printk ("Unknown interrupt 0x%02x\n", irq);
137 void mvme16x_enable_irq (unsigned int irq)
142 void mvme16x_disable_irq (unsigned int irq)