include/asm-frv/irq-routing.h

   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
  20 struct irq_source;
  21 struct irq_level;
  22
  23 /*
  24  * IRQ action distribution sets
  25  */
  26 struct 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  */
  38 struct 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  */
  51 struct 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
  59 extern struct irq_level frv_irq_levels[16];
  60 extern struct irq_group *irq_groups[NR_IRQ_GROUPS];
  61
  62 extern void frv_irq_route(struct irq_source *source, int irqlevel);
  63 extern void frv_irq_route_external(struct irq_source *source, int irq);
  64 extern void frv_irq_set_group(struct irq_group *group);
  65 extern void distribute_irqs(struct irq_group *group, unsigned long irqmask);
  66 extern void route_cpu_irqs(void);
  67
  68 #endif /* !__ASSEMBLY__ */
  69
  70 #endif /* _ASM_IRQ_ROUTING_H */