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authorPeter Tyser <ptyser@xes-inc.com>2010-04-12 22:28:10 -0500
committerWolfgang Denk <wd@denx.de>2010-04-13 09:13:17 +0200
commit8f0fec74ac6d0f3a7134ccebafa1ed9bd8c712ba (patch)
tree1bd91a72857c1345faae7b15bd15b0eb9bdf9366 /arch/sh/cpu/sh4/watchdog.c
parent8d1f268204b07e172f3cb5cee0a3974d605b0b98 (diff)
downloadu-boot-linaro-stable-8f0fec74ac6d0f3a7134ccebafa1ed9bd8c712ba.tar.gz
sh: Move cpu/$CPU to arch/sh/cpu/$CPU
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'arch/sh/cpu/sh4/watchdog.c')
-rw-r--r--arch/sh/cpu/sh4/watchdog.c71
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)
+ ;
+}