Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __irq_h |
| 2 | #define __irq_h |
| 3 | |
| 4 | /* |
| 5 | * Please do not include this file in generic code. There is currently |
| 6 | * no requirement for any architecture to implement anything held |
| 7 | * within this file. |
| 8 | * |
| 9 | * Thanks. --rmk |
| 10 | */ |
| 11 | |
| 12 | #include <linux/config.h> |
| 13 | |
| 14 | #if !defined(CONFIG_ARCH_S390) |
| 15 | |
| 16 | #include <linux/linkage.h> |
| 17 | #include <linux/cache.h> |
| 18 | #include <linux/spinlock.h> |
| 19 | #include <linux/cpumask.h> |
| 20 | |
| 21 | #include <asm/irq.h> |
| 22 | #include <asm/ptrace.h> |
| 23 | |
| 24 | /* |
| 25 | * IRQ line status. |
| 26 | */ |
| 27 | #define IRQ_INPROGRESS 1 /* IRQ handler active - do not enter! */ |
| 28 | #define IRQ_DISABLED 2 /* IRQ disabled - do not enter! */ |
| 29 | #define IRQ_PENDING 4 /* IRQ pending - replay on enable */ |
| 30 | #define IRQ_REPLAY 8 /* IRQ has been replayed but not acked yet */ |
| 31 | #define IRQ_AUTODETECT 16 /* IRQ is being autodetected */ |
| 32 | #define IRQ_WAITING 32 /* IRQ not yet seen - for autodetection */ |
| 33 | #define IRQ_LEVEL 64 /* IRQ level triggered */ |
| 34 | #define IRQ_MASKED 128 /* IRQ masked - shouldn't be seen again */ |
| 35 | #define IRQ_PER_CPU 256 /* IRQ is per CPU */ |
| 36 | |
| 37 | /* |
| 38 | * Interrupt controller descriptor. This is all we need |
| 39 | * to describe about the low-level hardware. |
| 40 | */ |
| 41 | struct hw_interrupt_type { |
| 42 | const char * typename; |
| 43 | unsigned int (*startup)(unsigned int irq); |
| 44 | void (*shutdown)(unsigned int irq); |
| 45 | void (*enable)(unsigned int irq); |
| 46 | void (*disable)(unsigned int irq); |
| 47 | void (*ack)(unsigned int irq); |
| 48 | void (*end)(unsigned int irq); |
| 49 | void (*set_affinity)(unsigned int irq, cpumask_t dest); |
Paolo 'Blaisorblade' Giarrusso | b77d6ad | 2005-06-21 17:16:24 -0700 | [diff] [blame] | 50 | /* Currently used only by UML, might disappear one day.*/ |
| 51 | #ifdef CONFIG_IRQ_RELEASE_METHOD |
Paolo 'Blaisorblade' Giarrusso | dbce706 | 2005-06-21 17:16:19 -0700 | [diff] [blame] | 52 | void (*release)(unsigned int irq, void *dev_id); |
Paolo 'Blaisorblade' Giarrusso | b77d6ad | 2005-06-21 17:16:24 -0700 | [diff] [blame] | 53 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | }; |
| 55 | |
| 56 | typedef struct hw_interrupt_type hw_irq_controller; |
| 57 | |
| 58 | /* |
| 59 | * This is the "IRQ descriptor", which contains various information |
| 60 | * about the irq, including what kind of hardware handling it has, |
| 61 | * whether it is disabled etc etc. |
| 62 | * |
| 63 | * Pad this out to 32 bytes for cache and indexing reasons. |
| 64 | */ |
| 65 | typedef struct irq_desc { |
| 66 | hw_irq_controller *handler; |
| 67 | void *handler_data; |
| 68 | struct irqaction *action; /* IRQ action list */ |
| 69 | unsigned int status; /* IRQ status */ |
| 70 | unsigned int depth; /* nested irq disables */ |
| 71 | unsigned int irq_count; /* For detecting broken interrupts */ |
| 72 | unsigned int irqs_unhandled; |
| 73 | spinlock_t lock; |
| 74 | } ____cacheline_aligned irq_desc_t; |
| 75 | |
| 76 | extern irq_desc_t irq_desc [NR_IRQS]; |
| 77 | |
| 78 | #include <asm/hw_irq.h> /* the arch dependent stuff */ |
| 79 | |
| 80 | extern int setup_irq(unsigned int irq, struct irqaction * new); |
| 81 | |
| 82 | #ifdef CONFIG_GENERIC_HARDIRQS |
| 83 | extern cpumask_t irq_affinity[NR_IRQS]; |
| 84 | extern int no_irq_affinity; |
| 85 | extern int noirqdebug_setup(char *str); |
| 86 | |
| 87 | extern fastcall int handle_IRQ_event(unsigned int irq, struct pt_regs *regs, |
| 88 | struct irqaction *action); |
| 89 | extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs); |
| 90 | extern void note_interrupt(unsigned int irq, irq_desc_t *desc, int action_ret); |
| 91 | extern void report_bad_irq(unsigned int irq, irq_desc_t *desc, int action_ret); |
| 92 | extern int can_request_irq(unsigned int irq, unsigned long irqflags); |
| 93 | |
| 94 | extern void init_irq_proc(void); |
| 95 | #endif |
| 96 | |
| 97 | extern hw_irq_controller no_irq_type; /* needed in every arch ? */ |
| 98 | |
| 99 | #endif |
| 100 | |
| 101 | #endif /* __irq_h */ |