ia64/xen-unstable

view linux-2.6-xen-sparse/include/linux/irq.h @ 8534:da7873110bbb

Tiny bootstrap cleanup.

Signed-off-by: Keir Fraser <keir@xensource.com>
author kaf24@firebug.cl.cam.ac.uk
date Mon Jan 09 19:46:46 2006 +0100 (2006-01-09)
parents 06d84bf87159
children fd9b2c1bb577
line source
1 #ifndef __irq_h
2 #define __irq_h
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 */
12 #include <linux/config.h>
14 #if !defined(CONFIG_ARCH_S390)
16 #include <linux/linkage.h>
17 #include <linux/cache.h>
18 #include <linux/spinlock.h>
19 #include <linux/cpumask.h>
21 #include <asm/irq.h>
22 #include <asm/ptrace.h>
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 */
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);
50 };
52 typedef struct hw_interrupt_type hw_irq_controller;
54 /*
55 * This is the "IRQ descriptor", which contains various information
56 * about the irq, including what kind of hardware handling it has,
57 * whether it is disabled etc etc.
58 *
59 * Pad this out to 32 bytes for cache and indexing reasons.
60 */
61 typedef struct irq_desc {
62 hw_irq_controller *handler;
63 void *handler_data;
64 struct irqaction *action; /* IRQ action list */
65 unsigned int status; /* IRQ status */
66 unsigned int depth; /* nested irq disables */
67 unsigned int irq_count; /* For detecting broken interrupts */
68 unsigned int irqs_unhandled;
69 spinlock_t lock;
70 } ____cacheline_aligned irq_desc_t;
72 extern irq_desc_t irq_desc [NR_IRQS];
74 #include <asm/hw_irq.h> /* the arch dependent stuff */
76 extern int setup_irq(unsigned int irq, struct irqaction * new);
77 extern int teardown_irq(unsigned int irq, struct irqaction * old);
79 #ifdef CONFIG_GENERIC_HARDIRQS
80 extern cpumask_t irq_affinity[NR_IRQS];
81 extern int no_irq_affinity;
82 extern int noirqdebug_setup(char *str);
84 extern fastcall int handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
85 struct irqaction *action);
86 extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
87 extern void note_interrupt(unsigned int irq, irq_desc_t *desc, int action_ret);
88 extern void report_bad_irq(unsigned int irq, irq_desc_t *desc, int action_ret);
89 extern int can_request_irq(unsigned int irq, unsigned long irqflags);
91 extern void init_irq_proc(void);
92 #endif
94 extern hw_irq_controller no_irq_type; /* needed in every arch ? */
96 #endif
98 #endif /* __irq_h */