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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef __irq_h |
| 2 | #define __irq_h |
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| 3 | |||
| 4 | /* |
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| 5 | * Please do not include this file in generic code. There is currently |
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| 6 | * no requirement for any architecture to implement anything held |
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| 7 | * within this file. |
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| 8 | * |
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| 9 | * Thanks. --rmk |
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| 10 | */ |
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| 11 | |||
| 12 | #include <linux/config.h> |
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| 13 | |||
| 14 | #if !defined(CONFIG_ARCH_S390) |
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| 15 | |||
| 16 | #include <linux/cache.h> |
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| 17 | #include <linux/spinlock.h> |
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| 18 | #include <linux/cpumask.h> |
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| 19 | |||
| 20 | #include <asm/irq.h> |
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| 21 | #include <asm/ptrace.h> |
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| 22 | |||
| 23 | /* |
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| 24 | * IRQ line status. |
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| 25 | */ |
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| 26 | #define IRQ_INPROGRESS 1 /* IRQ handler active - do not enter! */ |
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| 27 | #define IRQ_DISABLED 2 /* IRQ disabled - do not enter! */ |
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| 28 | #define IRQ_PENDING 4 /* IRQ pending - replay on enable */ |
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| 29 | #define IRQ_REPLAY 8 /* IRQ has been replayed but not acked yet */ |
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| 30 | #define IRQ_AUTODETECT 16 /* IRQ is being autodetected */ |
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| 31 | #define IRQ_WAITING 32 /* IRQ not yet seen - for autodetection */ |
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| 32 | #define IRQ_LEVEL 64 /* IRQ level triggered */ |
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| 33 | #define IRQ_MASKED 128 /* IRQ masked - shouldn't be seen again */ |
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| 34 | #define IRQ_PER_CPU 256 /* IRQ is per CPU */ |
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| 35 | |||
| 36 | /* |
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| 37 | * Interrupt controller descriptor. This is all we need |
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| 38 | * to describe about the low-level hardware. |
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| 39 | */ |
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| 40 | struct hw_interrupt_type { |
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| 41 | const char * typename; |
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| 42 | unsigned int (*startup)(unsigned int irq); |
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| 43 | void (*shutdown)(unsigned int irq); |
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| 44 | void (*enable)(unsigned int irq); |
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| 45 | void (*disable)(unsigned int irq); |
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| 46 | void (*ack)(unsigned int irq); |
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| 47 | void (*end)(unsigned int irq); |
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| 48 | void (*set_affinity)(unsigned int irq, cpumask_t dest); |
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| 49 | }; |
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| 50 | |||
| 51 | typedef struct hw_interrupt_type hw_irq_controller; |
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| 52 | |||
| 53 | /* |
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| 54 | * This is the "IRQ descriptor", which contains various information |
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| 55 | * about the irq, including what kind of hardware handling it has, |
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| 56 | * whether it is disabled etc etc. |
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| 57 | * |
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| 58 | * Pad this out to 32 bytes for cache and indexing reasons. |
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| 59 | */ |
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| 60 | typedef struct irq_desc { |
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| 61 | unsigned int status; /* IRQ status */ |
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| 62 | hw_irq_controller *handler; |
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| 63 | struct irqaction *action; /* IRQ action list */ |
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| 64 | unsigned int depth; /* nested irq disables */ |
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| 65 | unsigned int irq_count; /* For detecting broken interrupts */ |
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| 66 | unsigned int irqs_unhandled; |
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| 67 | spinlock_t lock; |
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| 68 | } ____cacheline_aligned irq_desc_t; |
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| 69 | |||
| 70 | extern irq_desc_t irq_desc [NR_IRQS]; |
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| 71 | |||
| 72 | #include <asm/hw_irq.h> /* the arch dependent stuff */ |
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| 73 | |||
| 74 | extern int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *); |
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| 75 | extern int setup_irq(unsigned int , struct irqaction * ); |
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| 76 | |||
| 77 | extern hw_irq_controller no_irq_type; /* needed in every arch ? */ |
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| 78 | |||
| 79 | #endif |
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| 80 | |||
| 81 | #endif /* __irq_h */ |