| 1 | #ifndef __irq_h |
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| 2 | #define __irq_h |
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| 3 | |
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| 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 | |
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| 12 | |
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| 13 | #if !defined(CONFIG_ARCH_S390) |
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| 14 | |
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| 15 | #include <linux/linkage.h> |
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| 16 | #include <linux/cache.h> |
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| 17 | #include <linux/cpumask.h> |
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| 18 | |
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| 19 | #include <asm/irq.h> |
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| 20 | #include <asm/ptrace.h> |
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| 21 | |
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| 22 | /* |
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| 23 | * IRQ line status. |
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| 24 | */ |
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| 25 | #define IRQ_INPROGRESS 1 /* IRQ handler active - do not enter! */ |
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| 26 | #define IRQ_DISABLED 2 /* IRQ disabled - do not enter! */ |
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| 27 | #define IRQ_PENDING 4 /* IRQ pending - replay on enable */ |
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| 28 | #define IRQ_REPLAY 8 /* IRQ has been replayed but not acked yet */ |
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| 29 | #define IRQ_AUTODETECT 16 /* IRQ is being autodetected */ |
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| 30 | #define IRQ_WAITING 32 /* IRQ not yet seen - for autodetection */ |
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| 31 | #define IRQ_LEVEL 64 /* IRQ level triggered */ |
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| 32 | #define IRQ_MASKED 128 /* IRQ masked - shouldn't be seen again */ |
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| 33 | #define IRQ_PER_CPU 256 /* IRQ is per CPU */ |
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| 34 | |
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| 35 | /* |
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| 36 | * Interrupt controller descriptor. This is all we need |
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| 37 | * to describe about the low-level hardware. |
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| 38 | */ |
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| 39 | struct hw_interrupt_type { |
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| 40 | const char * typename; |
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| 41 | unsigned int (*startup)(unsigned int irq); |
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| 42 | void (*shutdown)(unsigned int irq); |
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| 43 | void (*enable)(unsigned int irq); |
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| 44 | void (*disable)(unsigned int irq); |
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| 45 | void (*ack)(unsigned int irq); |
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| 46 | void (*end)(unsigned int irq); |
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| 47 | void (*set_affinity)(unsigned int irq, cpumask_t dest); |
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| 48 | }; |
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| 49 | |
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| 50 | typedef struct hw_interrupt_type hw_irq_controller; |
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| 51 | |
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| 52 | /* |
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| 53 | * This is the "IRQ descriptor", which contains various information |
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| 54 | * about the irq, including what kind of hardware handling it has, |
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| 55 | * whether it is disabled etc etc. |
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| 56 | * |
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| 57 | * Pad this out to 32 bytes for cache and indexing reasons. |
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| 58 | */ |
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| 59 | typedef struct irq_desc { |
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| 60 | hw_irq_controller *handler; |
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| 61 | void *handler_data; |
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| 62 | struct irqaction *action; /* IRQ action list */ |
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| 63 | unsigned int status; /* IRQ status */ |
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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 | |
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| 70 | extern irq_desc_t irq_desc [NR_IRQS]; |
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| 71 | |
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| 72 | #include <asm/hw_irq.h> /* the arch dependent stuff */ |
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| 73 | |
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| 74 | extern int setup_irq(unsigned int irq, struct irqaction * new); |
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| 75 | |
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| 76 | #ifdef CONFIG_GENERIC_HARDIRQS |
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| 77 | extern cpumask_t irq_affinity[NR_IRQS]; |
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| 78 | extern int no_irq_affinity; |
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| 79 | extern int noirqdebug_setup(char *str); |
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| 80 | |
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| 81 | extern fastcall int handle_IRQ_event(unsigned int irq, struct pt_regs *regs, |
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| 82 | struct irqaction *action); |
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| 83 | extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs); |
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| 84 | extern void note_interrupt(unsigned int irq, irq_desc_t *desc, int action_ret); |
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| 85 | extern void report_bad_irq(unsigned int irq, irq_desc_t *desc, int action_ret); |
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| 86 | extern int can_request_irq(unsigned int irq, unsigned long irqflags); |
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| 87 | |
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| 88 | extern void init_irq_proc(void); |
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| 89 | #endif |
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| 90 | |
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| 91 | extern hw_irq_controller no_irq_type; /* needed in every arch ? */ |
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| 92 | |
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| 93 | #endif |
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| 94 | |
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| 95 | #endif /* __irq_h */ |
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