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-rw-r--r--arch/m68k/coldfire/reset.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/m68k/coldfire/reset.c b/arch/m68k/coldfire/reset.c
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+++ b/arch/m68k/coldfire/reset.c
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+/*
+ * reset.c -- common ColdFire SoC reset support
+ *
+ * (C) Copyright 2012, Greg Ungerer <gerg@uclinux.org>
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <asm/machdep.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+
+/*
+ * There are 2 common methods amongst the ColdFure parts for reseting
+ * the CPU. But there are couple of exceptions, the 5272 and the 547x
+ * have something completely special to them, and we let their specific
+ * subarch code handle them.
+ */
+
+#ifdef MCFSIM_SYPCR
+static void mcf_cpu_reset(void)
+{
+ local_irq_disable();
+ /* Set watchdog to soft reset, and enabled */
+ __raw_writeb(0xc0, MCFSIM_SYPCR);
+ for (;;)
+ /* wait for watchdog to timeout */;
+}
+#endif
+
+#ifdef MCF_RCR
+static void mcf_cpu_reset(void)
+{
+ local_irq_disable();
+ __raw_writeb(MCF_RCR_SWRESET, MCF_RCR);
+}
+#endif
+
+static int __init mcf_setup_reset(void)
+{
+ mach_reset = mcf_cpu_reset;
+ return 0;
+}
+
+arch_initcall(mcf_setup_reset);