From 4a9cbbe832e1c377d04cfb53e9679844595bc3cf Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Tue, 27 Aug 2002 09:48:53 +0000
Subject: Initial revision

---
 cpu/74xx_7xx/speed.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 cpu/74xx_7xx/speed.c

(limited to 'cpu/74xx_7xx/speed.c')

diff --git a/cpu/74xx_7xx/speed.c b/cpu/74xx_7xx/speed.c
new file mode 100644
index 000000000..fe553f125
--- /dev/null
+++ b/cpu/74xx_7xx/speed.c
@@ -0,0 +1,76 @@
+/*
+ * (C) Copyright 2000-2002
+ * 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>
+#include <74xx_7xx.h>
+#include <asm/processor.h>
+
+static const int hid1_multipliers_x_10[] = {
+	25,	/* 0000 - 2.5x */
+	75,	/* 0001 - 7.5x */
+	70,	/* 0010 - 7x */
+	10,	/* 0011 - bypass */
+	20,	/* 0100 - 2x */
+	65,	/* 0101 - 6.5x */
+	100,	/* 0110 - 10x */
+	45,	/* 0111 - 4.5x */
+	30,	/* 1000 - 3x */
+	55,	/* 1001 - 5.5x */
+	40,	/* 1010 - 4x */
+	50,	/* 1011 - 5x */
+	80,	/* 1100 - 8x */
+	60,	/* 1101 - 6x */
+	35,	/* 1110 - 3.5x */
+	0	/* 1111 - off */
+};
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Measure CPU clock speed (core clock GCLK1, GCLK2)
+ *
+ * (Approx. GCLK frequency in Hz)
+ */
+
+int get_clocks (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	ulong clock = CFG_BUS_CLK * \
+		      hid1_multipliers_x_10[get_hid1 () >> 28] / 10;
+	gd->cpu_clk = clock;
+	gd->bus_clk = CFG_BUS_CLK;
+
+	return (0);
+}
+
+/* ------------------------------------------------------------------------- */
+
+#if 0	/* disabled XXX - use global data instead */
+ulong get_bus_freq (ulong gclk_freq)
+{
+	return CFG_BUS_CLK;
+}
+#endif /* 0 */
+
+/* ------------------------------------------------------------------------- */
-- 
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