From c021880ac5837154ca51b9d84e6b75f39b64aabe Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Thu, 27 Mar 2003 12:09:35 +0000
Subject: * Add support for MIPS32 4Kc CPUs

* Add support for INCA-IP Board
---
 lib_mips/time.c | 103 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 lib_mips/time.c

(limited to 'lib_mips/time.c')

diff --git a/lib_mips/time.c b/lib_mips/time.c
new file mode 100644
index 000000000..9e6138da9
--- /dev/null
+++ b/lib_mips/time.c
@@ -0,0 +1,103 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, 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 <common.h>
+
+
+static inline void mips_compare_set(u32 v)
+{
+	asm volatile ("mtc0 %0, $11" : : "r" (v));
+}
+
+static inline void mips_count_set(u32 v)
+{
+	asm volatile ("mtc0 %0, $9" : : "r" (v));
+}
+
+
+static inline u32 mips_count_get(void)
+{
+	u32 count;
+
+	asm volatile ("mfc0 %0, $9" : "=r" (count) :);
+	return count;
+}
+
+/*
+ * timer without interrupts
+ */
+
+int timer_init(void)
+{
+	mips_compare_set(0);
+	mips_count_set(0);
+
+	return 0;
+}
+
+void reset_timer(void)
+{
+	mips_count_set(0);
+}
+
+ulong get_timer(ulong base)
+{
+	return mips_count_get() - base;
+}
+
+void set_timer(ulong t)
+{
+	mips_count_set(t);
+}
+
+void udelay (unsigned long usec)
+{
+	ulong tmo;
+	ulong start = get_timer(0);
+
+	tmo = usec * CFG_HZ / 1000;
+	tmo /= 1000;
+
+	while ((ulong)((mips_count_get() - start)) < tmo)
+		/*NOP*/;
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On MIPS it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return mips_count_get();
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On MIPS it returns the number of timer ticks per second.
+ */
+ulong get_tbclk(void)
+{
+	return CFG_HZ;
+}
+
+
-- 
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