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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _M68K_IRQ_H_
2#define _M68K_IRQ_H_
3
4#include <linux/config.h>
5#include <linux/interrupt.h>
6#include <asm/ptrace.h>
7
8#ifdef CONFIG_COLDFIRE
9/*
10 * On the ColdFire we keep track of all vectors. That way drivers
11 * can register whatever vector number they wish, and we can deal
12 * with it.
13 */
14#define SYS_IRQS 256
15#define NR_IRQS SYS_IRQS
16
17#else
18
19/*
20 * # of m68k interrupts
21 */
22#define SYS_IRQS 8
23#define NR_IRQS (24+SYS_IRQS)
24
25#endif /* CONFIG_COLDFIRE */
26
27/*
28 * Interrupt source definitions
29 * General interrupt sources are the level 1-7.
30 * Adding an interrupt service routine for one of these sources
31 * results in the addition of that routine to a chain of routines.
32 * Each one is called in succession. Each individual interrupt
33 * service routine should determine if the device associated with
34 * that routine requires service.
35 */
36
37#define IRQ1 (1) /* level 1 interrupt */
38#define IRQ2 (2) /* level 2 interrupt */
39#define IRQ3 (3) /* level 3 interrupt */
40#define IRQ4 (4) /* level 4 interrupt */
41#define IRQ5 (5) /* level 5 interrupt */
42#define IRQ6 (6) /* level 6 interrupt */
43#define IRQ7 (7) /* level 7 interrupt (non-maskable) */
44
45/*
46 * Machine specific interrupt sources.
47 *
48 * Adding an interrupt service routine for a source with this bit
49 * set indicates a special machine specific interrupt source.
50 * The machine specific files define these sources.
51 *
52 * The IRQ_MACHSPEC bit is now gone - the only thing it did was to
53 * introduce unnecessary overhead.
54 *
55 * All interrupt handling is actually machine specific so it is better
56 * to use function pointers, as used by the Sparc port, and select the
57 * interrupt handling functions when initializing the kernel. This way
58 * we save some unnecessary overhead at run-time.
59 * 01/11/97 - Jes
60 */
61
62extern void (*mach_enable_irq)(unsigned int);
63extern void (*mach_disable_irq)(unsigned int);
64
65/*
66 * various flags for request_irq() - the Amiga now uses the standard
67 * mechanism like all other architectures - SA_INTERRUPT and SA_SHIRQ
68 * are your friends.
69 */
70#define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */
71#define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */
72#define IRQ_FLG_FAST (0x0004)
73#define IRQ_FLG_SLOW (0x0008)
74#define IRQ_FLG_STD (0x8000) /* internally used */
75
76#ifdef CONFIG_M68360
77
78#define CPM_INTERRUPT IRQ4
79
80/* see MC68360 User's Manual, p. 7-377 */
81#define CPM_VECTOR_BASE 0x04 /* 3 MSbits of CPM vector */
82
83#endif /* CONFIG_M68360 */
84
85/*
86 * This structure is used to chain together the ISRs for a particular
87 * interrupt source (if it supports chaining).
88 */
89typedef struct irq_node {
90 irqreturn_t (*handler)(int, void *, struct pt_regs *);
91 unsigned long flags;
92 void *dev_id;
93 const char *devname;
94 struct irq_node *next;
95} irq_node_t;
96
97/*
98 * This structure has only 4 elements for speed reasons
99 */
100typedef struct irq_handler {
101 irqreturn_t (*handler)(int, void *, struct pt_regs *);
102 unsigned long flags;
103 void *dev_id;
104 const char *devname;
105} irq_handler_t;
106
107/* count of spurious interrupts */
108extern volatile unsigned int num_spurious;
109
110/*
111 * This function returns a new irq_node_t
112 */
113extern irq_node_t *new_irq_node(void);
114
115/*
116 * Some drivers want these entry points
117 */
118#define enable_irq(x) (mach_enable_irq ? (*mach_enable_irq)(x) : 0)
119#define disable_irq(x) (mach_disable_irq ? (*mach_disable_irq)(x) : 0)
120
121#define enable_irq_nosync(x) enable_irq(x)
122#define disable_irq_nosync(x) disable_irq(x)
123
124struct irqaction;
125struct pt_regs;
126int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
127
128#endif /* _M68K_IRQ_H_ */