4 #include <linux/linkage.h>
5 #include <linux/hardirq.h>
6 #include <linux/irqreturn.h>
7 #include <linux/spinlock_types.h>
10 * 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.
15 #if defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
17 #elif defined(CONFIG_ATARI) || defined(CONFIG_MAC)
19 #elif defined(CONFIG_Q40)
21 #elif defined(CONFIG_AMIGA)
23 #elif defined(CONFIG_APOLLO)
25 #elif defined(CONFIG_HP300)
32 * 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:
36 #if (1 << HARDIRQ_BITS) < NR_IRQS
37 # error HARDIRQ_BITS is too low!
41 * 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.
50 #define IRQ_SPURIOUS 0
52 #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) */
62 extern unsigned int irq_canonicalize(unsigned int irq
);
67 * various flags for request_irq() - the Amiga now uses the standard
68 * mechanism like all other architectures - IRQF_DISABLED and
69 * IRQF_SHARED are your friends.
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 */
80 * This structure is used to chain together the ISRs for a particular
81 * interrupt source (if it supports chaining).
83 typedef struct irq_node
{
84 irqreturn_t (*handler
)(int, void *);
86 struct irq_node
*next
;
92 * This structure has only 4 elements for speed reasons
95 int (*handler
)(int, void *);
101 struct irq_controller
{
104 int (*startup
)(unsigned int irq
);
105 void (*shutdown
)(unsigned int irq
);
106 void (*enable
)(unsigned int irq
);
107 void (*disable
)(unsigned int irq
);
110 extern int m68k_irq_startup(unsigned int);
111 extern void m68k_irq_shutdown(unsigned int);
114 * This function returns a new irq_node_t
116 extern irq_node_t
*new_irq_node(void);
118 extern void m68k_setup_auto_interrupt(void (*handler
)(unsigned int, struct pt_regs
*));
119 extern void m68k_setup_user_interrupt(unsigned int vec
, unsigned int cnt
,
120 void (*handler
)(unsigned int, struct pt_regs
*));
121 extern void m68k_setup_irq_controller(struct irq_controller
*, unsigned int, unsigned int);
123 asmlinkage
void m68k_handle_int(unsigned int);
124 asmlinkage
void __m68k_handle_int(unsigned int, struct pt_regs
*);
126 #endif /* _M68K_IRQ_H_ */