summaryrefslogtreecommitdiff
path: root/lib_nios2/time.c
diff options
context:
space:
mode:
authorwdenk <wdenk>2004-10-10 21:27:30 +0000
committerwdenk <wdenk>2004-10-10 21:27:30 +0000
commit5c952cf0245421feb4644f2e71487c0b2e1dbd13 (patch)
tree47b80e839d339fe11dabd01ec8c89b46b791f797 /lib_nios2/time.c
parent03f5c55021c2d6297e66cc11bfea75f149a5d71c (diff)
downloadu-boot-imx-5c952cf0245421feb4644f2e71487c0b2e1dbd13.zip
u-boot-imx-5c952cf0245421feb4644f2e71487c0b2e1dbd13.tar.gz
u-boot-imx-5c952cf0245421feb4644f2e71487c0b2e1dbd13.tar.bz2
Patches by Scott McNutt, 24 Aug 2004:
- Add support for Altera Nios-II processors. - Add support for Psyent PCI-5441 board. - Add support for Psyent PK1C20 board.
Diffstat (limited to 'lib_nios2/time.c')
-rw-r--r--lib_nios2/time.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/lib_nios2/time.c b/lib_nios2/time.c
new file mode 100644
index 0000000..25a233e
--- /dev/null
+++ b/lib_nios2/time.c
@@ -0,0 +1,39 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * 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 <watchdog.h>
+
+
+extern void dly_clks( unsigned long ticks );
+
+void udelay(unsigned long usec)
+{
+ /* The Nios core doesn't have a timebase, so we do our
+ * best for now and call a low-level loop that counts
+ * cpu clocks.
+ */
+ unsigned long cnt = (CONFIG_SYS_CLK_FREQ/1000000) * usec;
+ WATCHDOG_RESET (); /* trigger watchdog if needed */
+ dly_clks (cnt);
+}