4 #include <linux/linkage.h>
5 #include <linux/hardirq.h>
6 #include <linux/spinlock_types.h>
9 * 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.
14 #if defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
16 #elif defined(CONFIG_ATARI) || defined(CONFIG_MAC)
18 #elif defined(CONFIG_Q40)
20 #elif defined(CONFIG_AMIGA)
22 #elif defined(CONFIG_APOLLO)
24 #elif defined(CONFIG_HP300)
31 * 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:
35 #if (1 << HARDIRQ_BITS) < NR_IRQS
36 # error HARDIRQ_BITS is too low!
40 * 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.
49 #define IRQ_SPURIOUS 0
51 #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) */
61 extern unsigned int irq_canonicalize(unsigned int irq);
66 * various flags for request_irq() - the Amiga now uses the standard
67 * mechanism like all other architectures - IRQF_DISABLED and
68 * IRQF_SHARED are your friends.
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 */
79 * This structure is used to chain together the ISRs for a particular
80 * interrupt source (if it supports chaining).
82 typedef struct irq_node {
83 int (*handler)(int, void *);
85 struct irq_node *next;
91 * This structure has only 4 elements for speed reasons
94 int (*handler)(int, void *);
100 struct irq_controller {
103 int (*startup)(unsigned int irq);
104 void (*shutdown)(unsigned int irq);
105 void (*enable)(unsigned int irq);
106 void (*disable)(unsigned int irq);
109 extern int m68k_irq_startup(unsigned int);
110 extern void m68k_irq_shutdown(unsigned int);
113 * This function returns a new irq_node_t
115 extern irq_node_t *new_irq_node(void);
117 extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *));
118 extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
119 void (*handler)(unsigned int, struct pt_regs *));
120 extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int);
122 asmlinkage void m68k_handle_int(unsigned int);
123 asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *);
125 #endif /* _M68K_IRQ_H_ */