at91rm9200: move reset code to reset.c

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 71 insertions, 0 deletions

diff --git a/cpu/arm920t/at91rm9200/reset.c b/cpu/arm920t/at91rm9200/reset.c
new file mode 100644
index 0000000..945ea2c
--- /dev/null
+++ b/cpu/arm920t/at91rm9200/reset.c
@@ -0,0 +1,71 @@
+/*
+ * (C) Copyright 2002
+ * Lineo, Inc. <www.lineo.com>
+ * Bernhard Kuhn <bkuhn@lineo.com>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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/arch/hardware.h>
+
+void board_reset(void) __attribute__((__weak__));
+
+/*
+ * Reset the cpu by setting up the watchdog timer and let him time out
+ * or toggle a GPIO pin on the AT91RM9200DK board
+ */
+void reset_cpu (ulong ignored)
+{
+
+#if defined(CONFIG_AT91RM9200_USART)
+	/*shutdown the console to avoid strange chars during reset */
+	serial_exit();
+#endif
+
+	if (board_reset)
+		board_reset();
+
+	/* this is the way Linux does it */
+
+	/* FIXME:
+	 * These defines should be moved into
+	 * include/asm-arm/arch-at91rm9200/AT91RM9200.h
+	 * as soon as the whitespace fix gets applied.
+	 */
+	#define AT91C_ST_RSTEN (0x1 << 16)
+	#define AT91C_ST_EXTEN (0x1 << 17)
+	#define AT91C_ST_WDRST (0x1 <<  0)
+	#define ST_WDMR *((unsigned long *)0xfffffd08)	/* watchdog mode register */
+	#define ST_CR *((unsigned long *)0xfffffd00)	/* system clock control register */
+
+	ST_WDMR = AT91C_ST_RSTEN | AT91C_ST_EXTEN | 1 ;
+	ST_CR = AT91C_ST_WDRST;
+
+	while (1);
+	/* Never reached */
+}