Initial import

1 files changed, 66 insertions, 0 deletions

diff --git a/arch/cris/kernel/irq.c b/arch/cris/kernel/irq.c
new file mode 100644
index 000000000..dd0be5de5
--- /dev/null
+++ b/arch/cris/kernel/irq.c
@@ -0,0 +1,66 @@
+/*
+ *
+ *	linux/arch/cris/kernel/irq.c
+ *
+ *      Copyright (c) 2000,2007 Axis Communications AB
+ *
+ *      Authors: Bjorn Wesen (bjornw@axis.com)
+ *
+ * This file contains the code used by various IRQ handling routines:
+ * asking for different IRQs should be done through these routines
+ * instead of just grabbing them. Thus setups with different IRQ numbers
+ * shouldn't result in any weird surprises, and installing new handlers
+ * should be easier.
+ *
+ */
+
+/*
+ * IRQs are in fact implemented a bit like signal handlers for the kernel.
+ * Naturally it's not a 1:1 relation, but there are similarities.
+ */
+
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/irq.h>
+
+#include <linux/kernel_stat.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/timex.h>
+#include <linux/random.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+#include <linux/errno.h>
+#include <linux/spinlock.h>
+
+#include <asm/io.h>
+#include <arch/system.h>
+
+/* called by the assembler IRQ entry functions defined in irq.h
+ * to dispatch the interrupts to registered handlers
+ */
+
+asmlinkage void do_IRQ(int irq, struct pt_regs * regs)
+{
+	unsigned long sp;
+	struct pt_regs *old_regs = set_irq_regs(regs);
+	irq_enter();
+	sp = rdsp();
+	if (unlikely((sp & (PAGE_SIZE - 1)) < (PAGE_SIZE/8))) {
+		printk("do_IRQ: stack overflow: %lX\n", sp);
+		show_stack(NULL, (unsigned long *)sp);
+	}
+	generic_handle_irq(irq);
+	irq_exit();
+	set_irq_regs(old_regs);
+}
+
+void weird_irq(void)
+{
+	local_irq_disable();
+	printk("weird irq\n");
+	while(1);
+}
+