2 * arch/m68k/bvme6000/bvmeints.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 bvme6000_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 bvme6000_init_IRQ (void)
45 * This function is called during kernel startup to initialize
46 * the bvme6000 IRQ handling routines.
49 void bvme6000_init_IRQ (void)
53 for (i = 0; i < 256; i++) {
54 irq_tab[i].handler = bvme6000_defhand;
55 irq_tab[i].flags = IRQ_FLG_STD;
56 irq_tab[i].dev_id = NULL;
57 irq_tab[i].devname = NULL;
62 int bvme6000_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);
71 /* Nothing special about auto-vectored devices for the BVME6000,
72 * but treat it specially to avoid changes elsewhere.
75 if (irq >= VEC_INT1 && irq <= VEC_INT7)
76 return cpu_request_irq(irq - VEC_SPUR, handler, flags,
79 if (!(irq_tab[irq].flags & IRQ_FLG_STD)) {
80 if (irq_tab[irq].flags & IRQ_FLG_LOCK) {
81 printk("%s: IRQ %d from %s is not replaceable\n",
82 __FUNCTION__, irq, irq_tab[irq].devname);
85 if (flags & IRQ_FLG_REPLACE) {
86 printk("%s: %s can't replace IRQ %d from %s\n",
87 __FUNCTION__, devname, irq, irq_tab[irq].devname);
91 irq_tab[irq].handler = handler;
92 irq_tab[irq].flags = flags;
93 irq_tab[irq].dev_id = dev_id;
94 irq_tab[irq].devname = devname;
98 void bvme6000_free_irq(unsigned int irq, void *dev_id)
101 printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
105 if (irq >= VEC_INT1 && irq <= VEC_INT7) {
106 cpu_free_irq(irq - VEC_SPUR, dev_id);
110 if (irq_tab[irq].dev_id != dev_id)
111 printk("%s: Removing probably wrong IRQ %d from %s\n",
112 __FUNCTION__, irq, irq_tab[irq].devname);
114 irq_tab[irq].handler = bvme6000_defhand;
115 irq_tab[irq].flags = IRQ_FLG_STD;
116 irq_tab[irq].dev_id = NULL;
117 irq_tab[irq].devname = NULL;
120 irqreturn_t bvme6000_process_int (unsigned long vec, struct pt_regs *fp)
123 printk ("bvme6000_process_int: Illegal vector %ld", vec);
126 irq_tab[vec].count++;
127 irq_tab[vec].handler(vec, irq_tab[vec].dev_id, fp);
132 int show_bvme6000_interrupts(struct seq_file *p, void *v)
136 for (i = 0; i < 256; i++) {
137 if (irq_tab[i].count)
138 seq_printf(p, "Vec 0x%02x: %8d %s\n",
140 irq_tab[i].devname ? irq_tab[i].devname : "free");
146 static irqreturn_t bvme6000_defhand (int irq, void *dev_id, struct pt_regs *fp)
148 printk ("Unknown interrupt 0x%02x\n", irq);
152 void bvme6000_enable_irq (unsigned int irq)
157 void bvme6000_disable_irq (unsigned int irq)