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