summaryrefslogtreecommitdiffstats
path: root/arch/m68k/include/asm/irq.h
blob: d0b7efd1f1e22d793f107365a2f7d3468a32f00d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
#ifndef _M68K_IRQ_H_
#define _M68K_IRQ_H_

/*
 * This should be the same as the max(NUM_X_SOURCES) for all the
 * different m68k hosts compiled into the kernel.
 * Currently the Atari has 72 and the Amiga 24, but if both are
 * supported in the kernel it is better to make room for 72.
 */
#if defined(CONFIG_COLDFIRE)
#define NR_IRQS 256
#elif defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
#define NR_IRQS 200
#elif defined(CONFIG_ATARI) || defined(CONFIG_MAC)
#define NR_IRQS 72
#elif defined(CONFIG_Q40)
#define NR_IRQS	43
#elif defined(CONFIG_AMIGA) || !defined(CONFIG_MMU)
#define NR_IRQS	32
#elif defined(CONFIG_APOLLO)
#define NR_IRQS	24
#elif defined(CONFIG_HP300)
#define NR_IRQS	8
#else
#define NR_IRQS	0
#endif

#ifdef CONFIG_MMU

#include <linux/linkage.h>
#include <linux/hardirq.h>
#include <linux/irqreturn.h>
#include <linux/spinlock_types.h>

/*
 * Interrupt source definitions
 * General interrupt sources are the level 1-7.
 * Adding an interrupt service routine for one of these sources
 * results in the addition of that routine to a chain of routines.
 * Each one is called in succession.  Each individual interrupt
 * service routine should determine if the device associated with
 * that routine requires service.
 */

#define IRQ_SPURIOUS	0

#define IRQ_AUTO_1	1	/* level 1 interrupt */
#define IRQ_AUTO_2	2	/* level 2 interrupt */
#define IRQ_AUTO_3	3	/* level 3 interrupt */
#define IRQ_AUTO_4	4	/* level 4 interrupt */
#define IRQ_AUTO_5	5	/* level 5 interrupt */
#define IRQ_AUTO_6	6	/* level 6 interrupt */
#define IRQ_AUTO_7	7	/* level 7 interrupt (non-maskable) */

#define IRQ_USER	8

extern unsigned int irq_canonicalize(unsigned int irq);

struct pt_regs;

/*
 * various flags for request_irq() - the Amiga now uses the standard
 * mechanism like all other architectures - IRQF_DISABLED and
 * IRQF_SHARED are your friends.
 */
#ifndef MACH_AMIGA_ONLY
#define IRQ_FLG_LOCK	(0x0001)	/* handler is not replaceable	*/
#define IRQ_FLG_REPLACE	(0x0002)	/* replace existing handler	*/
#define IRQ_FLG_FAST	(0x0004)
#define IRQ_FLG_SLOW	(0x0008)
#define IRQ_FLG_STD	(0x8000)	/* internally used		*/
#endif

/*
 * This structure is used to chain together the ISRs for a particular
 * interrupt source (if it supports chaining).
 */
struct irq_data {
	unsigned int	irq;
	irqreturn_t	(*handler)(int, void *);
	void		*dev_id;
	struct irq_data *next;
	unsigned long	flags;
	const char	*devname;
};

/*
 * This structure has only 4 elements for speed reasons
 */
struct irq_handler {
	int		(*handler)(int, void *);
	unsigned long	flags;
	void		*dev_id;
	const char	*devname;
};

struct irq_chip {
	const char *name;
	unsigned int (*irq_startup)(struct irq_data *data);
	void (*irq_shutdown)(struct irq_data *data);
	void (*irq_enable)(struct irq_data *data);
	void (*irq_disable)(struct irq_data *data);
};

extern unsigned int m68k_irq_startup(struct irq_data *data);
extern unsigned int m68k_irq_startup_irq(unsigned int irq);
extern void m68k_irq_shutdown(struct irq_data *data);

/*
 * This function returns a new struct irq_data
 */
extern struct irq_data *new_irq_node(void);

extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *));
extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
				      void (*handler)(unsigned int, struct pt_regs *));
extern void m68k_setup_irq_chip(struct irq_chip *, unsigned int, unsigned int);
#define m68k_setup_irq_controller(chip, dummy, irq, cnt) \
	m68k_setup_irq_chip((chip), (irq), (cnt))

asmlinkage void m68k_handle_int(unsigned int);
asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *);

#else
#define irq_canonicalize(irq)  (irq)
#endif /* CONFIG_MMU */

asmlinkage void do_IRQ(int irq, struct pt_regs *regs);

#endif /* _M68K_IRQ_H_ */