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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _M68K_IRQ_H_
2#define _M68K_IRQ_H_
3
Roman Zippel68387c42006-06-25 05:47:01 -07004#include <linux/linkage.h>
Roman Zippelb5dc7842006-06-25 05:47:00 -07005#include <linux/hardirq.h>
Geert Uytterhoeven4b2873b2009-03-26 09:48:45 +01006#include <linux/irqreturn.h>
Roman Zippelb5dc7842006-06-25 05:47:00 -07007#include <linux/spinlock_types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
9/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * This should be the same as the max(NUM_X_SOURCES) for all the
11 * different m68k hosts compiled into the kernel.
12 * Currently the Atari has 72 and the Amiga 24, but if both are
13 * supported in the kernel it is better to make room for 72.
14 */
Roman Zippel68387c42006-06-25 05:47:01 -070015#if defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
16#define NR_IRQS 200
17#elif defined(CONFIG_ATARI) || defined(CONFIG_MAC)
18#define NR_IRQS 72
19#elif defined(CONFIG_Q40)
20#define NR_IRQS 43
21#elif defined(CONFIG_AMIGA)
22#define NR_IRQS 32
23#elif defined(CONFIG_APOLLO)
24#define NR_IRQS 24
25#elif defined(CONFIG_HP300)
26#define NR_IRQS 8
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#else
Geert Uytterhoevenedfd92f2008-07-17 21:16:12 +020028#define NR_IRQS 0
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#endif
30
31/*
Al Viro85b07cd2006-01-12 01:06:10 -080032 * The hardirq mask has to be large enough to have
33 * space for potentially all IRQ sources in the system
34 * nesting on a single CPU:
35 */
36#if (1 << HARDIRQ_BITS) < NR_IRQS
37# error HARDIRQ_BITS is too low!
38#endif
39
40/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 * Interrupt source definitions
42 * General interrupt sources are the level 1-7.
43 * Adding an interrupt service routine for one of these sources
44 * results in the addition of that routine to a chain of routines.
45 * Each one is called in succession. Each individual interrupt
46 * service routine should determine if the device associated with
47 * that routine requires service.
48 */
49
Roman Zippel4facfde2006-06-25 05:46:59 -070050#define IRQ_SPURIOUS 0
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Roman Zippel4facfde2006-06-25 05:46:59 -070052#define IRQ_AUTO_1 1 /* level 1 interrupt */
53#define IRQ_AUTO_2 2 /* level 2 interrupt */
54#define IRQ_AUTO_3 3 /* level 3 interrupt */
55#define IRQ_AUTO_4 4 /* level 4 interrupt */
56#define IRQ_AUTO_5 5 /* level 5 interrupt */
57#define IRQ_AUTO_6 6 /* level 6 interrupt */
58#define IRQ_AUTO_7 7 /* level 7 interrupt (non-maskable) */
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Roman Zippel4facfde2006-06-25 05:46:59 -070060#define IRQ_USER 8
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Roman Zippel68387c42006-06-25 05:47:01 -070062extern unsigned int irq_canonicalize(unsigned int irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64struct pt_regs;
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066/*
67 * various flags for request_irq() - the Amiga now uses the standard
Thomas Gleixnerb0b9fdc2006-07-01 19:29:19 -070068 * mechanism like all other architectures - IRQF_DISABLED and
69 * IRQF_SHARED are your friends.
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 */
71#ifndef MACH_AMIGA_ONLY
72#define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */
73#define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */
74#define IRQ_FLG_FAST (0x0004)
75#define IRQ_FLG_SLOW (0x0008)
76#define IRQ_FLG_STD (0x8000) /* internally used */
77#endif
78
79/*
80 * This structure is used to chain together the ISRs for a particular
81 * interrupt source (if it supports chaining).
82 */
83typedef struct irq_node {
Geert Uytterhoeven4b2873b2009-03-26 09:48:45 +010084 irqreturn_t (*handler)(int, void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 void *dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 struct irq_node *next;
Roman Zippelb5dc7842006-06-25 05:47:00 -070087 unsigned long flags;
88 const char *devname;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089} irq_node_t;
90
91/*
92 * This structure has only 4 elements for speed reasons
93 */
Al Viro2850bc22006-10-07 14:16:45 +010094struct irq_handler {
95 int (*handler)(int, void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 unsigned long flags;
97 void *dev_id;
98 const char *devname;
Al Viro2850bc22006-10-07 14:16:45 +010099};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Roman Zippelb5dc7842006-06-25 05:47:00 -0700101struct irq_controller {
102 const char *name;
103 spinlock_t lock;
104 int (*startup)(unsigned int irq);
105 void (*shutdown)(unsigned int irq);
106 void (*enable)(unsigned int irq);
107 void (*disable)(unsigned int irq);
108};
109
110extern int m68k_irq_startup(unsigned int);
111extern void m68k_irq_shutdown(unsigned int);
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113/*
114 * This function returns a new irq_node_t
115 */
116extern irq_node_t *new_irq_node(void);
117
Roman Zippel68387c42006-06-25 05:47:01 -0700118extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *));
119extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
120 void (*handler)(unsigned int, struct pt_regs *));
121extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int);
122
Al Viro2850bc22006-10-07 14:16:45 +0100123asmlinkage void m68k_handle_int(unsigned int);
124asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *);
Roman Zippel68387c42006-06-25 05:47:01 -0700125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126#endif /* _M68K_IRQ_H_ */