diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/irq.h |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/linux/irq.h')
-rw-r--r-- | include/linux/irq.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h new file mode 100644 index 00000000000..c3ff4d10166 --- /dev/null +++ b/include/linux/irq.h | |||
@@ -0,0 +1,97 @@ | |||
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); | ||
50 | }; | ||
51 | |||
52 | typedef struct hw_interrupt_type hw_irq_controller; | ||
53 | |||
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; | ||
71 | |||
72 | extern irq_desc_t irq_desc [NR_IRQS]; | ||
73 | |||
74 | #include <asm/hw_irq.h> /* the arch dependent stuff */ | ||
75 | |||
76 | extern int setup_irq(unsigned int irq, struct irqaction * new); | ||
77 | |||
78 | #ifdef CONFIG_GENERIC_HARDIRQS | ||
79 | extern cpumask_t irq_affinity[NR_IRQS]; | ||
80 | extern int no_irq_affinity; | ||
81 | extern int noirqdebug_setup(char *str); | ||
82 | |||
83 | extern fastcall int handle_IRQ_event(unsigned int irq, struct pt_regs *regs, | ||
84 | struct irqaction *action); | ||
85 | extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs); | ||
86 | extern void note_interrupt(unsigned int irq, irq_desc_t *desc, int action_ret); | ||
87 | extern void report_bad_irq(unsigned int irq, irq_desc_t *desc, int action_ret); | ||
88 | extern int can_request_irq(unsigned int irq, unsigned long irqflags); | ||
89 | |||
90 | extern void init_irq_proc(void); | ||
91 | #endif | ||
92 | |||
93 | extern hw_irq_controller no_irq_type; /* needed in every arch ? */ | ||
94 | |||
95 | #endif | ||
96 | |||
97 | #endif /* __irq_h */ | ||