* Make sure HUSH is initialized for running auto-update scripts

[karo-tx-uboot.git] / cpu / ixp / timer.c

diff --git a/cpu/ixp/timer.c b/cpu/ixp/timer.c
new file mode 100644 (file)
index 0000000..baa7e72
--- /dev/null
+++ b/cpu/ixp/timer.c
@@ -0,0 +1,74 @@
+/* vi: set ts=8 sw=8 noet: */
+/*
+ * (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/ixp425.h>
+
+void ixp425_udelay(unsigned long usec)
+{
+       /*
+        * This function has a max usec, but since it is called from udelay
+        * we should not have to worry... be happy
+        */
+       unsigned long usecs = CFG_HZ/1000000L & ~IXP425_OST_RELOAD_MASK;
+
+       *IXP425_OSST = IXP425_OSST_TIMER_1_PEND;
+       usecs |= IXP425_OST_ONE_SHOT | IXP425_OST_ENABLE;
+       *IXP425_OSRT1 = usecs;
+       while (!(*IXP425_OSST & IXP425_OSST_TIMER_1_PEND));
+}
+
+void udelay (unsigned long usec)
+{
+       while (usec--) ixp425_udelay(1);
+}
+
+static ulong reload_constant = 0xfffffff0;
+
+void reset_timer_masked (void)
+{
+       ulong reload = reload_constant | IXP425_OST_ONE_SHOT | IXP425_OST_ENABLE;
+
+       *IXP425_OSST = IXP425_OSST_TIMER_1_PEND;
+       *IXP425_OSRT1 = reload;
+}
+
+ulong get_timer_masked (void)
+{
+       /*
+        * Note that it is possible for this to wrap!
+        * In this case we return max.
+        */
+       ulong current = *IXP425_OST1;
+       if (*IXP425_OSST & IXP425_OSST_TIMER_1_PEND)
+       {
+               return reload_constant;
+       }
+       return (reload_constant - current);
+}