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/* irq-routing.h: multiplexed IRQ routing
*
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ASM_IRQ_ROUTING_H
#define _ASM_IRQ_ROUTING_H
#ifndef __ASSEMBLY__
#include <linux/spinlock.h>
#include <asm/irq.h>
struct irq_source;
struct irq_level;
/*
* IRQ action distribution sets
*/
struct irq_group {
int first_irq; /* first IRQ distributed here */
void (*control)(struct irq_group *group, int index, int on);
struct irqaction *actions[NR_IRQ_ACTIONS_PER_GROUP]; /* IRQ action chains */
struct irq_source *sources[NR_IRQ_ACTIONS_PER_GROUP]; /* IRQ sources */
int disable_cnt[NR_IRQ_ACTIONS_PER_GROUP]; /* disable counts */
};
/*
* IRQ source manager
*/
struct irq_source {
struct irq_source *next;
struct irq_level *level;
const char *muxname;
volatile void __iomem *muxdata;
unsigned long irqmask;
void (*doirq)(struct irq_source *source);
};
/*
* IRQ level management (per CPU IRQ priority / entry vector)
*/
struct irq_level {
int usage;
int disable_count;
unsigned long flags; /* current IRQF_DISABLED and IRQF_SHARED settings */
spinlock_t lock;
struct irq_source *sources;
};
extern struct irq_level frv_irq_levels[16];
extern struct irq_group *irq_groups[NR_IRQ_GROUPS];
extern void frv_irq_route(struct irq_source *source, int irqlevel);
extern void frv_irq_route_external(struct irq_source *source, int irq);
extern void frv_irq_set_group(struct irq_group *group);
extern void distribute_irqs(struct irq_group *group, unsigned long irqmask);
extern void route_cpu_irqs(void);
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_IRQ_ROUTING_H */
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