blob: f4ae7d8feac682cc9190e795f3cbdaf2a43280a3 [file] [log] [blame]
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);
62extern void enable_irq(unsigned int);
63extern void disable_irq(unsigned int);
Al Viro00fc00d2006-01-18 21:22:55 -050064#define disable_irq_nosync disable_irq
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
66struct pt_regs;
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068/*
69 * various flags for request_irq() - the Amiga now uses the standard
70 * mechanism like all other architectures - SA_INTERRUPT and SA_SHIRQ
71 * are your friends.
72 */
73#ifndef MACH_AMIGA_ONLY
74#define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */
75#define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */
76#define IRQ_FLG_FAST (0x0004)
77#define IRQ_FLG_SLOW (0x0008)
78#define IRQ_FLG_STD (0x8000) /* internally used */
79#endif
80
81/*
82 * This structure is used to chain together the ISRs for a particular
83 * interrupt source (if it supports chaining).
84 */
85typedef struct irq_node {
Roman Zippelb5dc7842006-06-25 05:47:00 -070086 int (*handler)(int, void *, struct pt_regs *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 void *dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 struct irq_node *next;
Roman Zippelb5dc7842006-06-25 05:47:00 -070089 unsigned long flags;
90 const char *devname;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091} irq_node_t;
92
93/*
94 * This structure has only 4 elements for speed reasons
95 */
96typedef struct irq_handler {
Roman Zippelb5dc7842006-06-25 05:47:00 -070097 int (*handler)(int, void *, struct pt_regs *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 unsigned long flags;
99 void *dev_id;
100 const char *devname;
101} irq_handler_t;
102
Roman Zippelb5dc7842006-06-25 05:47:00 -0700103struct irq_controller {
104 const char *name;
105 spinlock_t lock;
106 int (*startup)(unsigned int irq);
107 void (*shutdown)(unsigned int irq);
108 void (*enable)(unsigned int irq);
109 void (*disable)(unsigned int irq);
110};
111
112extern int m68k_irq_startup(unsigned int);
113extern void m68k_irq_shutdown(unsigned int);
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115/*
116 * This function returns a new irq_node_t
117 */
118extern irq_node_t *new_irq_node(void);
119
Roman Zippel68387c42006-06-25 05:47:01 -0700120extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *));
121extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
122 void (*handler)(unsigned int, struct pt_regs *));
123extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int);
124
125asmlinkage void m68k_handle_int(unsigned int, struct pt_regs *);
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127#endif /* _M68K_IRQ_H_ */