patch-2.3.43 linux/include/asm-ia64/irq.h

• Lines: 121
• Date: Wed Feb 9 19:45:43 2000
• Orig file: v2.3.42/linux/include/asm-ia64/irq.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.42/linux/include/asm-ia64/irq.h linux/include/asm-ia64/irq.h
@@ -0,0 +1,120 @@
+#ifndef _ASM_IA64_IRQ_H
+#define _ASM_IA64_IRQ_H
+
+/*
+ * Copyright (C) 1999-2000 Hewlett-Packard Co
+ * Copyright (C) 1998-2000 David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 1998 Stephane Eranian <eranian@hpl.hp.com>
+ *
+ * 11/24/98	S.Eranian 	updated TIMER_IRQ and irq_cannonicalize
+ * 01/20/99	S.Eranian	added keyboard interrupt
+ */
+
+#include <linux/config.h>
+#include <linux/spinlock.h>
+
+#include <asm/ptrace.h>
+
+#define NR_IRQS		256
+#define NR_ISA_IRQS	 16
+
+/*
+ * 0 special
+ *
+ * 1,3-14 are reserved from firmware
+ *
+ * 16-255 (vectored external interrupts) are available
+ *
+ * 15 spurious interrupt (see IVR)
+ *
+ * 16 lowest priority, 255 highest priority
+ *
+ * 15 classes of 16 interrupts each.
+ */
+#define IA64_MIN_VECTORED_IRQ	 16
+#define IA64_MAX_VECTORED_IRQ	255
+
+#define IA64_SPURIOUS_INT	0x0f
+#define PERFMON_IRQ		0x28	/* performanc monitor interrupt vector */
+#define TIMER_IRQ		0xef	/* use highest-prio group 15 interrupt for timer */
+#define IPI_IRQ			0xfe	/* inter-processor interrupt vector */
+#define CMC_IRQ			0xff	/* correctable machine-check interrupt vector */
+
+#define IA64_MIN_VECTORED_IRQ	 16
+#define IA64_MAX_VECTORED_IRQ	255
+
+extern __u8 irq_to_vector_map[IA64_MIN_VECTORED_IRQ];
+#define map_legacy_irq(x) (((x) < IA64_MIN_VECTORED_IRQ) ? irq_to_vector_map[(x)] : (x))
+
+#define IRQ_INPROGRESS	(1 << 0)	/* irq handler active */
+#define IRQ_ENABLED	(1 << 1)	/* irq enabled */
+#define IRQ_PENDING	(1 << 2)	/* irq pending */
+#define IRQ_REPLAY	(1 << 3)	/* irq has been replayed but not acked yet */
+#define IRQ_AUTODETECT	(1 << 4)	/* irq is being autodetected */
+#define IRQ_WAITING	(1 << 5)	/* used for autodetection: irq not yet seen yet */
+
+struct hw_interrupt_type {
+	const char *typename;
+	void (*init) (unsigned long addr);
+	void (*startup) (unsigned int irq);
+	void (*shutdown) (unsigned int irq);
+	int (*handle) (unsigned int irq, struct pt_regs *regs);
+	void (*enable) (unsigned int irq);
+	void (*disable) (unsigned int irq);
+};
+
+extern struct hw_interrupt_type irq_type_default;	/* dummy interrupt controller */
+extern struct hw_interrupt_type irq_type_ia64_internal;	/* CPU-internal interrupt controller */
+
+struct irq_desc {
+	unsigned int type;		/* type of interrupt (level vs. edge triggered) */
+	unsigned int status;		/* see above */
+	unsigned int depth;		/* disable depth for nested irq disables */
+	struct hw_interrupt_type *handler;
+	struct irqaction *action;	/* irq action list */
+};
+
+extern struct irq_desc irq_desc[NR_IRQS];
+
+extern spinlock_t irq_controller_lock;
+
+/* IA64 inter-cpu interrupt related definitions */
+
+/* Delivery modes for inter-cpu interrupts */
+enum {
+        IA64_IPI_DM_INT =       0x0,    /* pend an external interrupt */
+        IA64_IPI_DM_PMI =       0x2,    /* pend a PMI */
+        IA64_IPI_DM_NMI =       0x4,    /* pend an NMI (vector 2) */
+        IA64_IPI_DM_INIT =      0x5,    /* pend an INIT interrupt */
+        IA64_IPI_DM_EXTINT =    0x7,    /* pend an 8259-compatible interrupt. */
+};
+
+#define IA64_BUS_ID(cpu)        (cpu >> 8)
+#define IA64_LOCAL_ID(cpu)      (cpu & 0xff)
+
+static __inline__ int
+irq_cannonicalize (int irq)
+{
+	/*
+	 * We do the legacy thing here of pretending that irqs < 16
+	 * are 8259 irqs.
+	 */
+	return ((irq == 2) ? 9 : irq);
+}
+
+extern int invoke_irq_handlers (unsigned int irq, struct pt_regs *regs, struct irqaction *action);
+extern void disable_irq (unsigned int);
+extern void disable_irq_nosync (unsigned int);
+extern void enable_irq (unsigned int);
+extern void ipi_send (int cpu, int vector, int delivery_mode);
+
+#ifdef CONFIG_SMP
+  extern void irq_enter(int cpu, int irq);
+  extern void irq_exit(int cpu, int irq);
+  extern void handle_IPI(int irq, void *dev_id, struct pt_regs *regs);
+#else
+# define irq_enter(cpu, irq)	(++local_irq_count[cpu])
+# define irq_exit(cpu, irq)	(--local_irq_count[cpu])
+#endif
+
+#endif /* _ASM_IA64_IRQ_H */