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-rw-r--r--arch/sh64/kernel/irq.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/sh64/kernel/irq.c b/arch/sh64/kernel/irq.c
new file mode 100644
index 000000000000..9fc2b71dbd84
--- /dev/null
+++ b/arch/sh64/kernel/irq.c
@@ -0,0 +1,116 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * arch/sh64/kernel/irq.c
+ *
+ * Copyright (C) 2000, 2001 Paolo Alberelli
+ * Copyright (C) 2003 Paul Mundt
+ *
+ */
+
+/*
+ * 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/config.h>
+#include <linux/errno.h>
+#include <linux/kernel_stat.h>
+#include <linux/signal.h>
+#include <linux/rwsem.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/timex.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+#include <linux/bitops.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/smp.h>
+#include <asm/pgalloc.h>
+#include <asm/delay.h>
+#include <asm/irq.h>
+#include <linux/irq.h>
+
+void ack_bad_irq(unsigned int irq)
+{
+ printk("unexpected IRQ trap at irq %02x\n", irq);
+}
+
+#if defined(CONFIG_PROC_FS)
+int show_interrupts(struct seq_file *p, void *v)
+{
+ int i = *(loff_t *) v, j;
+ struct irqaction * action;
+ unsigned long flags;
+
+ if (i == 0) {
+ seq_puts(p, " ");
+ for (j=0; j<NR_CPUS; j++)
+ if (cpu_online(j))
+ seq_printf(p, "CPU%d ",j);
+ seq_putc(p, '\n');
+ }
+
+ if (i < NR_IRQS) {
+ spin_lock_irqsave(&irq_desc[i].lock, flags);
+ action = irq_desc[i].action;
+ if (!action)
+ goto unlock;
+ seq_printf(p, "%3d: ",i);
+ seq_printf(p, "%10u ", kstat_irqs(i));
+ seq_printf(p, " %14s", irq_desc[i].handler->typename);
+ seq_printf(p, " %s", action->name);
+
+ for (action=action->next; action; action = action->next)
+ seq_printf(p, ", %s", action->name);
+ seq_putc(p, '\n');
+unlock:
+ spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+ }
+ return 0;
+}
+#endif
+
+/*
+ * do_NMI handles all Non-Maskable Interrupts.
+ */
+asmlinkage void do_NMI(unsigned long vector_num, struct pt_regs * regs)
+{
+ if (regs->sr & 0x40000000)
+ printk("unexpected NMI trap in system mode\n");
+ else
+ printk("unexpected NMI trap in user mode\n");
+
+ /* No statistics */
+}
+
+/*
+ * do_IRQ handles all normal device IRQ's.
+ */
+asmlinkage int do_IRQ(unsigned long vector_num, struct pt_regs * regs)
+{
+ int irq;
+
+ irq_enter();
+
+ irq = irq_demux(vector_num);
+
+ if (irq >= 0) {
+ __do_IRQ(irq, regs);
+ } else {
+ printk("unexpected IRQ trap at vector %03lx\n", vector_num);
+ }
+
+ irq_exit();
+
+ return 1;
+}
+