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1/* irq-routing.h: multiplexed IRQ routing
2 *
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#ifndef _ASM_IRQ_ROUTING_H
13#define _ASM_IRQ_ROUTING_H
14
15#ifndef __ASSEMBLY__
16
17#include <linux/spinlock.h>
18#include <asm/irq.h>
19
20struct irq_source;
21struct irq_level;
22
23/*
24 * IRQ action distribution sets
25 */
26struct irq_group {
27 int first_irq; /* first IRQ distributed here */
28 void (*control)(struct irq_group *group, int index, int on);
29
30 struct irqaction *actions[NR_IRQ_ACTIONS_PER_GROUP]; /* IRQ action chains */
31 struct irq_source *sources[NR_IRQ_ACTIONS_PER_GROUP]; /* IRQ sources */
32 int disable_cnt[NR_IRQ_ACTIONS_PER_GROUP]; /* disable counts */
33};
34
35/*
36 * IRQ source manager
37 */
38struct irq_source {
39 struct irq_source *next;
40 struct irq_level *level;
41 const char *muxname;
42 volatile void __iomem *muxdata;
43 unsigned long irqmask;
44
45 void (*doirq)(struct irq_source *source);
46};
47
48/*
49 * IRQ level management (per CPU IRQ priority / entry vector)
50 */
51struct irq_level {
52 int usage;
53 int disable_count;
54 unsigned long flags; /* current SA_INTERRUPT and SA_SHIRQ settings */
55 spinlock_t lock;
56 struct irq_source *sources;
57};
58
59extern struct irq_level frv_irq_levels[16];
60extern struct irq_group *irq_groups[NR_IRQ_GROUPS];
61
62extern void frv_irq_route(struct irq_source *source, int irqlevel);
63extern void frv_irq_route_external(struct irq_source *source, int irq);
64extern void frv_irq_set_group(struct irq_group *group);
65extern void distribute_irqs(struct irq_group *group, unsigned long irqmask);
66extern void route_cpu_irqs(void);
67
68#endif /* !__ASSEMBLY__ */
69
70#endif /* _ASM_IRQ_ROUTING_H */