| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |