| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/asm-arm/mach/irq.h |
| 3 | * |
| 4 | * Copyright (C) 1995-2000 Russell King. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | #ifndef __ASM_ARM_MACH_IRQ_H |
| 11 | #define __ASM_ARM_MACH_IRQ_H |
| 12 | |
| 13 | struct irqdesc; |
| 14 | struct pt_regs; |
| 15 | struct seq_file; |
| 16 | |
| 17 | typedef void (*irq_handler_t)(unsigned int, struct irqdesc *, struct pt_regs *); |
| 18 | typedef void (*irq_control_t)(unsigned int); |
| 19 | |
| 20 | struct irqchip { |
| 21 | /* |
| 22 | * Acknowledge the IRQ. |
| 23 | * If this is a level-based IRQ, then it is expected to mask the IRQ |
| 24 | * as well. |
| 25 | */ |
| 26 | void (*ack)(unsigned int); |
| 27 | /* |
| 28 | * Mask the IRQ in hardware. |
| 29 | */ |
| 30 | void (*mask)(unsigned int); |
| 31 | /* |
| 32 | * Unmask the IRQ in hardware. |
| 33 | */ |
| 34 | void (*unmask)(unsigned int); |
| 35 | /* |
| 36 | * Re-run the IRQ |
| 37 | */ |
| 38 | void (*rerun)(unsigned int); |
| 39 | /* |
| 40 | * Set the type of the IRQ. |
| 41 | */ |
| 42 | int (*type)(unsigned int, unsigned int); |
| 43 | }; |
| 44 | |
| 45 | struct irqdesc { |
| 46 | irq_handler_t handle; |
| 47 | struct irqchip *chip; |
| 48 | struct irqaction *action; |
| 49 | |
| 50 | unsigned int enabled : 1; /* IRQ is currently enabled */ |
| 51 | unsigned int triggered: 1; /* IRQ has occurred */ |
| 52 | unsigned int running : 1; /* IRQ is running */ |
| 53 | unsigned int pending : 1; /* IRQ is pending */ |
| 54 | unsigned int probing : 1; /* IRQ in use for a probe */ |
| 55 | unsigned int probe_ok : 1; /* IRQ can be used for probe */ |
| 56 | unsigned int valid : 1; /* IRQ claimable */ |
| 57 | unsigned int noautoenable : 1; /* don't automatically enable IRQ */ |
| 58 | unsigned int unused :23; |
| 59 | unsigned int depth; /* disable depth */ |
| 60 | |
| 61 | /* |
| 62 | * IRQ lock detection |
| 63 | */ |
| 64 | unsigned int lck_cnt; |
| 65 | unsigned int lck_pc; |
| 66 | unsigned int lck_jif; |
| 67 | }; |
| 68 | |
| 69 | extern struct irqdesc irq_desc[]; |
| 70 | |
| 71 | /* |
| 72 | * This is internal. Do not use it. |
| 73 | */ |
| 74 | extern void (*init_arch_irq)(void); |
| 75 | extern void init_FIQ(void); |
| 76 | extern int show_fiq_list(struct seq_file *, void *); |
| 77 | void __set_irq_handler(unsigned int irq, irq_handler_t, int); |
| 78 | |
| 79 | /* |
| 80 | * External stuff. |
| 81 | */ |
| 82 | #define set_irq_handler(irq,handler) __set_irq_handler(irq,handler,0) |
| 83 | #define set_irq_chained_handler(irq,handler) __set_irq_handler(irq,handler,1) |
| 84 | |
| 85 | void set_irq_chip(unsigned int irq, struct irqchip *); |
| 86 | void set_irq_flags(unsigned int irq, unsigned int flags); |
| 87 | |
| 88 | #define IRQF_VALID (1 << 0) |
| 89 | #define IRQF_PROBE (1 << 1) |
| 90 | #define IRQF_NOAUTOEN (1 << 2) |
| 91 | |
| 92 | /* |
| 93 | * Built-in IRQ handlers. |
| 94 | */ |
| 95 | void do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs); |
| 96 | void do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs); |
| 97 | void do_simple_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs); |
| 98 | void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs); |
| 99 | void dummy_mask_unmask_irq(unsigned int irq); |
| 100 | |
| 101 | #endif |