1 files changed, 131 insertions, 0 deletions

diff --git a/include/asm-m68k/irq.h b/include/asm-m68k/irq.h
new file mode 100644
index 000000000000..1f569905cb74
--- /dev/null
+++ b/include/asm-m68k/irq.h
@@ -0,0 +1,131 @@
+#ifndef _M68K_IRQ_H_
+#define _M68K_IRQ_H_
+
+#include <linux/config.h>
+#include <linux/interrupt.h>
+
+/*
+ * # of m68k interrupts
+ */
+
+#define SYS_IRQS 8
+
+/*
+ * This should be the same as the max(NUM_X_SOURCES) for all the
+ * different m68k hosts compiled into the kernel.
+ * Currently the Atari has 72 and the Amiga 24, but if both are
+ * supported in the kernel it is better to make room for 72.
+ */
+#if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
+#define NR_IRQS (72+SYS_IRQS)
+#else
+#define NR_IRQS (24+SYS_IRQS)
+#endif
+
+/*
+ * Interrupt source definitions
+ * General interrupt sources are the level 1-7.
+ * Adding an interrupt service routine for one of these sources
+ * results in the addition of that routine to a chain of routines.
+ * Each one is called in succession.  Each individual interrupt
+ * service routine should determine if the device associated with
+ * that routine requires service.
+ */
+
+#define IRQ1            (1)     /* level 1 interrupt */
+#define IRQ2            (2)     /* level 2 interrupt */
+#define IRQ3            (3)     /* level 3 interrupt */
+#define IRQ4            (4)     /* level 4 interrupt */
+#define IRQ5            (5)     /* level 5 interrupt */
+#define IRQ6            (6)     /* level 6 interrupt */
+#define IRQ7            (7)     /* level 7 interrupt (non-maskable) */
+
+/*
+ * "Generic" interrupt sources
+ */
+
+#define IRQ_SCHED_TIMER (8)    /* interrupt source for scheduling timer */
+
+static __inline__ int irq_canonicalize(int irq)
+{
+        return irq;
+}
+
+/*
+ * Machine specific interrupt sources.
+ *
+ * Adding an interrupt service routine for a source with this bit
+ * set indicates a special machine specific interrupt source.
+ * The machine specific files define these sources.
+ *
+ * The IRQ_MACHSPEC bit is now gone - the only thing it did was to
+ * introduce unnecessary overhead.
+ *
+ * All interrupt handling is actually machine specific so it is better
+ * to use function pointers, as used by the Sparc port, and select the
+ * interrupt handling functions when initializing the kernel. This way
+ * we save some unnecessary overhead at run-time.
+ *                                                      01/11/97 - Jes
+ */
+
+extern void (*enable_irq)(unsigned int);
+extern void (*disable_irq)(unsigned int);
+
+#define disable_irq_nosync      disable_irq
+#define enable_irq_nosync       enable_irq
+
+struct pt_regs;
+
+extern int cpu_request_irq(unsigned int,
+                           irqreturn_t (*)(int, void *, struct pt_regs *),
+                           unsigned long, const char *, void *);
+extern void cpu_free_irq(unsigned int, void *);
+
+/*
+ * various flags for request_irq() - the Amiga now uses the standard
+ * mechanism like all other architectures - SA_INTERRUPT and SA_SHIRQ
+ * are your friends.
+ */
+#ifndef MACH_AMIGA_ONLY
+#define IRQ_FLG_LOCK    (0x0001)        /* handler is not replaceable   */
+#define IRQ_FLG_REPLACE (0x0002)        /* replace existing handler     */
+#define IRQ_FLG_FAST    (0x0004)
+#define IRQ_FLG_SLOW    (0x0008)
+#define IRQ_FLG_STD     (0x8000)        /* internally used              */
+#endif
+
+/*
+ * This structure is used to chain together the ISRs for a particular
+ * interrupt source (if it supports chaining).
+ */
+typedef struct irq_node {
+        irqreturn_t     (*handler)(int, void *, struct pt_regs *);
+        unsigned long   flags;
+        void            *dev_id;
+        const char      *devname;
+        struct irq_node *next;
+} irq_node_t;
+
+/*
+ * This structure has only 4 elements for speed reasons
+ */
+typedef struct irq_handler {
+        irqreturn_t     (*handler)(int, void *, struct pt_regs *);
+        unsigned long   flags;
+        void            *dev_id;
+        const char      *devname;
+} irq_handler_t;
+
+/* count of spurious interrupts */
+extern volatile unsigned int num_spurious;
+
+/*
+ * This function returns a new irq_node_t
+ */
+extern irq_node_t *new_irq_node(void);
+
+struct irqaction;
+struct pt_regs;
+int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
+
+#endif /* _M68K_IRQ_H_ */