From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 arch/sh/kernel/irq.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 arch/sh/kernel/irq.c

(limited to 'arch/sh/kernel/irq.c')

diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
new file mode 100644
index 0000000..54c1712
--- /dev/null
+++ b/arch/sh/kernel/irq.c
@@ -0,0 +1,106 @@
+/* $Id: irq.c,v 1.20 2004/01/13 05:52:11 kkojima Exp $
+ *
+ * linux/arch/sh/kernel/irq.c
+ *
+ *	Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
+ *
+ *
+ * SuperH version:  Copyright (C) 1999  Niibe Yutaka
+ */
+
+/*
+ * 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/module.h>
+#include <linux/ptrace.h>
+#include <linux/errno.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/mm.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/kallsyms.h>
+#include <linux/bitops.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/pgalloc.h>
+#include <asm/delay.h>
+#include <asm/irq.h>
+#include <linux/irq.h>
+
+
+/*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+ * each architecture has to answer this themselves, it doesn't deserve
+ * a generic callback i think.
+ */
+void ack_bad_irq(unsigned int irq)
+{
+	printk("unexpected IRQ trap at vector %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 < ACTUAL_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
+
+asmlinkage int do_IRQ(unsigned long r4, unsigned long r5,
+		      unsigned long r6, unsigned long r7,
+		      struct pt_regs regs)
+{	
+	int irq;
+
+	irq_enter();
+	asm volatile("stc	r2_bank, %0\n\t"
+		     "shlr2	%0\n\t"
+		     "shlr2	%0\n\t"
+		     "shlr	%0\n\t"
+		     "add	#-16, %0\n\t"
+		     :"=z" (irq));
+	irq = irq_demux(irq);
+	__do_IRQ(irq, &regs);
+	irq_exit();
+	return 1;
+}
-- 
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