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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>
6#include <linux/spinlock_types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
8/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * This should be the same as the max(NUM_X_SOURCES) for all the
10 * different m68k hosts compiled into the kernel.
11 * Currently the Atari has 72 and the Amiga 24, but if both are
12 * supported in the kernel it is better to make room for 72.
13 */
Roman Zippel68387c42006-06-25 05:47:01 -070014#if defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
15#define NR_IRQS 200
16#elif defined(CONFIG_ATARI) || defined(CONFIG_MAC)
17#define NR_IRQS 72
18#elif defined(CONFIG_Q40)
19#define NR_IRQS 43
20#elif defined(CONFIG_AMIGA)
21#define NR_IRQS 32
22#elif defined(CONFIG_APOLLO)
23#define NR_IRQS 24
24#elif defined(CONFIG_HP300)
25#define NR_IRQS 8
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#else
Roman Zippel68387c42006-06-25 05:47:01 -070027#error unknown nr of irqs
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#endif
29
30/*
Al Viro85b07cd2006-01-12 01:06:10 -080031 * The hardirq mask has to be large enough to have
32 * space for potentially all IRQ sources in the system
33 * nesting on a single CPU:
34 */
35#if (1 << HARDIRQ_BITS) < NR_IRQS
36# error HARDIRQ_BITS is too low!
37#endif
38
39/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 * Interrupt source definitions
41 * General interrupt sources are the level 1-7.
42 * Adding an interrupt service routine for one of these sources
43 * results in the addition of that routine to a chain of routines.
44 * Each one is called in succession. Each individual interrupt
45 * service routine should determine if the device associated with
46 * that routine requires service.
47 */
48
Roman Zippel4facfde2006-06-25 05:46:59 -070049#define IRQ_SPURIOUS 0
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Roman Zippel4facfde2006-06-25 05:46:59 -070051#define IRQ_AUTO_1 1 /* level 1 interrupt */
52#define IRQ_AUTO_2 2 /* level 2 interrupt */
53#define IRQ_AUTO_3 3 /* level 3 interrupt */
54#define IRQ_AUTO_4 4 /* level 4 interrupt */
55#define IRQ_AUTO_5 5 /* level 5 interrupt */
56#define IRQ_AUTO_6 6 /* level 6 interrupt */
57#define IRQ_AUTO_7 7 /* level 7 interrupt (non-maskable) */
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Roman Zippel4facfde2006-06-25 05:46:59 -070059#define IRQ_USER 8
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Roman Zippel68387c42006-06-25 05:47:01 -070061extern unsigned int irq_canonicalize(unsigned int irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63struct pt_regs;
64
Linus Torvalds1da177e2005-04-16 15:20:36 -070065/*
66 * various flags for request_irq() - the Amiga now uses the standard
Thomas Gleixnerb0b9fdc2006-07-01 19:29:19 -070067 * mechanism like all other architectures - IRQF_DISABLED and
68 * IRQF_SHARED are your friends.
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 */
70#ifndef MACH_AMIGA_ONLY
71#define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */
72#define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */
73#define IRQ_FLG_FAST (0x0004)
74#define IRQ_FLG_SLOW (0x0008)
75#define IRQ_FLG_STD (0x8000) /* internally used */
76#endif
77
78/*
79 * This structure is used to chain together the ISRs for a particular
80 * interrupt source (if it supports chaining).
81 */
82typedef struct irq_node {
Al Viro2850bc22006-10-07 14:16:45 +010083 int (*handler)(int, void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 void *dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 struct irq_node *next;
Roman Zippelb5dc7842006-06-25 05:47:00 -070086 unsigned long flags;
87 const char *devname;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088} irq_node_t;
89
90/*
91 * This structure has only 4 elements for speed reasons
92 */
Al Viro2850bc22006-10-07 14:16:45 +010093struct irq_handler {
94 int (*handler)(int, void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 unsigned long flags;
96 void *dev_id;
97 const char *devname;
Al Viro2850bc22006-10-07 14:16:45 +010098};
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Roman Zippelb5dc7842006-06-25 05:47:00 -0700100struct irq_controller {
101 const char *name;
102 spinlock_t lock;
103 int (*startup)(unsigned int irq);
104 void (*shutdown)(unsigned int irq);
105 void (*enable)(unsigned int irq);
106 void (*disable)(unsigned int irq);
107};
108
109extern int m68k_irq_startup(unsigned int);
110extern void m68k_irq_shutdown(unsigned int);
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112/*
113 * This function returns a new irq_node_t
114 */
115extern irq_node_t *new_irq_node(void);
116
Roman Zippel68387c42006-06-25 05:47:01 -0700117extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *));
118extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
119 void (*handler)(unsigned int, struct pt_regs *));
120extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int);
121
Al Viro2850bc22006-10-07 14:16:45 +0100122asmlinkage void m68k_handle_int(unsigned int);
123asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *);
Roman Zippel68387c42006-06-25 05:47:01 -0700124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125#endif /* _M68K_IRQ_H_ */