patch-2.3.43 linux/arch/ia64/hp/hpsim_irq.c

• Lines: 84
• Date: Sun Feb 6 18:42:40 2000
• Orig file: v2.3.42/linux/arch/ia64/hp/hpsim_irq.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.42/linux/arch/ia64/hp/hpsim_irq.c linux/arch/ia64/hp/hpsim_irq.c
@@ -0,0 +1,83 @@
+/*
+ * Platform dependent support for HP simulator.
+ *
+ * Copyright (C) 1998, 1999 Hewlett-Packard Co
+ * Copyright (C) 1998, 1999 David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 1999 Vijay Chander <vijay@engr.sgi.com>
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/kdev_t.h>
+#include <linux/console.h>
+
+#include <asm/delay.h>
+#include <asm/irq.h>
+#include <asm/pal.h>
+#include <asm/machvec.h>
+#include <asm/pgtable.h>
+#include <asm/sal.h>
+
+
+static int
+irq_hp_sim_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_INPROGRESS) == 0 && (status & IRQ_ENABLED) != 0) {
+			action = id->action;
+			status |= IRQ_INPROGRESS;
+		}
+		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);
+	{
+		id->status &= ~IRQ_INPROGRESS;
+	}
+	spin_unlock(&irq_controller_lock);
+
+	return retval;
+}
+
+static void
+irq_hp_sim_noop (unsigned int irq)
+{
+}
+
+static struct hw_interrupt_type irq_type_hp_sim = {
+	"hp_sim",
+	(void (*)(unsigned long)) irq_hp_sim_noop,	/* init */
+	irq_hp_sim_noop,				/* startup */
+	irq_hp_sim_noop,				/* shutdown */
+	irq_hp_sim_handle_irq,				/* handle */
+	irq_hp_sim_noop,				/* enable */
+	irq_hp_sim_noop,				/* disable */
+};
+
+void
+hpsim_irq_init (struct irq_desc desc[NR_IRQS])
+{
+	int i;
+
+	for (i = IA64_MIN_VECTORED_IRQ; i <= IA64_MAX_VECTORED_IRQ; ++i) {
+		irq_desc[i].handler = &irq_type_hp_sim;
+	}
+}