1 files changed, 71 insertions, 0 deletions
diff --git a/arch/sh/cpu/sh4/watchdog.c b/arch/sh/cpu/sh4/watchdog.c
new file mode 100644
index 000000000..f6924290f
--- /dev/null
+++ b/arch/sh/cpu/sh4/watchdog.c
@@ -0,0 +1,71 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+
+#define WDT_BASE	WTCNT
+
+#define WDT_WD		(1 << 6)
+#define WDT_RST_P	(0)
+#define WDT_RST_M	(1 << 5)
+#define WDT_ENABLE	(1 << 7)
+
+#if defined(CONFIG_WATCHDOG)
+static unsigned char csr_read(void)
+{
+	return inb(WDT_BASE + 0x04);
+}
+
+static void cnt_write(unsigned char value)
+{
+	outl((unsigned short)value | 0x5A00, WDT_BASE + 0x00);
+}
+
+static void csr_write(unsigned char value)
+{
+	outl((unsigned short)value | 0xA500, WDT_BASE + 0x04);
+}
+
+void watchdog_reset(void)
+{
+	outl(0x55000000, WDT_BASE + 0x08);
+}
+
+int watchdog_init(void)
+{
+	/* Set overflow time*/
+	cnt_write(0);
+	/* Power on reset */
+	csr_write(WDT_WD|WDT_RST_P|WDT_ENABLE);
+
+	return 0;
+}
+
+int watchdog_disable(void)
+{
+	csr_write(csr_read() & ~WDT_ENABLE);
+	return 0;
+}
+#endif
+
+void reset_cpu(unsigned long ignored)
+{
+	while (1)
+		;
+}