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authorwdenk <wdenk>2003-03-27 12:09:35 +0000
committerwdenk <wdenk>2003-03-27 12:09:35 +0000
commitc021880ac5837154ca51b9d84e6b75f39b64aabe (patch)
tree5f9c3cce4dd7b49e69ec5007f58c9b9a2f215c15 /cpu/mips/incaip_wdt.S
parentac6dbb85b7f080d923013bff4e1d5267cb6f8a5a (diff)
* Add support for MIPS32 4Kc CPUs
* Add support for INCA-IP Board
Diffstat (limited to 'cpu/mips/incaip_wdt.S')
-rw-r--r--cpu/mips/incaip_wdt.S73
1 files changed, 73 insertions, 0 deletions
diff --git a/cpu/mips/incaip_wdt.S b/cpu/mips/incaip_wdt.S
new file mode 100644
index 0000000000..9455569f52
--- /dev/null
+++ b/cpu/mips/incaip_wdt.S
@@ -0,0 +1,73 @@
+/*
+ * INCA-IP Watchdog timer management code.
+ *
+ * Copyright (c) 2003 Wolfgang Denk <wd@denx.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 <config.h>
+#include <version.h>
+#include <asm/regdef.h>
+
+
+#define WD_BASE 0xb8000000
+#define WD_CON0(value) 0x0020(value)
+#define WD_CON1(value) 0x0024(value)
+#define WD_DISABLE 0x00000008
+#define WD_ENABLE 0x00000000
+#define WD_WRITE_PW 0xFFFC00F8
+#define WD_WRITE_ENDINIT 0xFFFC00F3
+#define WD_WRITE_INIT 0xFFFC00F2
+
+
+ .globl disable_incaip_wdt
+disable_incaip_wdt:
+ li t0, WD_BASE
+
+ /* Calculate password.
+ */
+ lw t2, WD_CON1(t0)
+ and t2, 0xC
+
+ lw t3, WD_CON0(t0)
+ and t3, 0xFFFFFF01
+
+ or t3, t2
+ or t3, 0xF0
+
+ sw t3, WD_CON0(t0) /* write password */
+
+ /* Clear ENDINIT.
+ */
+ li t1, WD_WRITE_INIT
+ sw t1, WD_CON0(t0)
+
+
+ li t1, WD_DISABLE
+ sw t1, WD_CON1(t0) /* disable watchdog */
+ li t1, WD_WRITE_PW
+ sw t1, WD_CON0(t0) /* write password */
+ li t1, WD_WRITE_ENDINIT
+ sw t1, WD_CON0(t0) /* end command */
+
+ j ra
+ nop
+