patch-2.3.43 linux/arch/ia64/kernel/irq_internal.c

• Lines: 72
• Date: Tue Feb 8 12:01:59 2000
• Orig file: v2.3.42/linux/arch/ia64/kernel/irq_internal.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.42/linux/arch/ia64/kernel/irq_internal.c linux/arch/ia64/kernel/irq_internal.c
@@ -0,0 +1,71 @@
+/*
+ * Internal Interrupt Vectors 
+ *
+ * This takes care of interrupts that are generated by the CPU
+ * internally, such as the ITC and IPI interrupts.
+ *
+ * Copyright (C) 1999 VA Linux Systems
+ * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+
+#include <asm/irq.h>
+#include <asm/processor.h>
+#include <asm/ptrace.h>
+
+/*
+ * This is identical to IOSAPIC handle_irq.  It may go away . . .
+ */
+static int
+internal_handle_irq (unsigned int irq, struct pt_regs *regs)
+{
+	struct irqaction *action = 0;
+	struct irq_desc *id = irq_desc + irq;
+	unsigned int status;
+	int retval;
+
+	spin_lock(&irq_controller_lock);
+	{
+		status = id->status;
+		if ((status & IRQ_ENABLED) != 0)
+			action = id->action;
+		id->status = status & ~(IRQ_REPLAY | IRQ_WAITING);
+	}
+	spin_unlock(&irq_controller_lock);
+
+	if (!action) {
+		if (!(id->status & IRQ_AUTODETECT))
+			printk("irq_hpsim_handle_irq: unexpected interrupt %u\n", irq);
+		return 0;
+	}
+
+	retval = invoke_irq_handlers(irq, regs, action);
+
+	spin_lock(&irq_controller_lock);
+	{
+		status = (id->status & ~IRQ_INPROGRESS);
+		id->status = status;
+	}
+	spin_unlock(&irq_controller_lock);
+
+	return retval;
+}
+
+static void
+internal_noop (unsigned int irq)
+{
+	/* nuthing to do... */
+}
+
+struct hw_interrupt_type irq_type_ia64_internal = {
+	"IA64 internal",
+	(void (*)(unsigned long)) internal_noop,	/* init */
+	internal_noop,					/* startup */
+	internal_noop,					/* shutdown */
+	internal_handle_irq,				/* handle */
+	internal_noop,					/* enable */
+	internal_noop					/* disable */
+};
+