2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * arch/sh64/kernel/irq.c
8 * Copyright (C) 2000, 2001 Paolo Alberelli
9 * Copyright (C) 2003 Paul Mundt
14 * IRQs are in fact implemented a bit like signal handlers for the kernel.
15 * Naturally it's not a 1:1 relation, but there are similarities.
18 #include <linux/config.h>
19 #include <linux/errno.h>
20 #include <linux/kernel_stat.h>
21 #include <linux/signal.h>
22 #include <linux/rwsem.h>
23 #include <linux/sched.h>
24 #include <linux/ioport.h>
25 #include <linux/interrupt.h>
26 #include <linux/timex.h>
27 #include <linux/slab.h>
28 #include <linux/random.h>
29 #include <linux/smp.h>
30 #include <linux/smp_lock.h>
31 #include <linux/init.h>
32 #include <linux/seq_file.h>
33 #include <linux/bitops.h>
34 #include <asm/system.h>
37 #include <asm/pgalloc.h>
38 #include <asm/delay.h>
40 #include <linux/irq.h>
42 void ack_bad_irq(unsigned int irq
)
44 printk("unexpected IRQ trap at irq %02x\n", irq
);
47 #if defined(CONFIG_PROC_FS)
48 int show_interrupts(struct seq_file
*p
, void *v
)
50 int i
= *(loff_t
*) v
, j
;
51 struct irqaction
* action
;
56 for_each_online_cpu(j
)
57 seq_printf(p
, "CPU%d ",j
);
62 spin_lock_irqsave(&irq_desc
[i
].lock
, flags
);
63 action
= irq_desc
[i
].action
;
66 seq_printf(p
, "%3d: ",i
);
67 seq_printf(p
, "%10u ", kstat_irqs(i
));
68 seq_printf(p
, " %14s", irq_desc
[i
].chip
->typename
);
69 seq_printf(p
, " %s", action
->name
);
71 for (action
=action
->next
; action
; action
= action
->next
)
72 seq_printf(p
, ", %s", action
->name
);
75 spin_unlock_irqrestore(&irq_desc
[i
].lock
, flags
);
82 * do_NMI handles all Non-Maskable Interrupts.
84 asmlinkage
void do_NMI(unsigned long vector_num
, struct pt_regs
* regs
)
86 if (regs
->sr
& 0x40000000)
87 printk("unexpected NMI trap in system mode\n");
89 printk("unexpected NMI trap in user mode\n");
95 * do_IRQ handles all normal device IRQ's.
97 asmlinkage
int do_IRQ(unsigned long vector_num
, struct pt_regs
* regs
)
103 irq
= irq_demux(vector_num
);
108 printk("unexpected IRQ trap at vector %03lx\n", vector_num
);