From 945af8d723a29e9b6289d84250745ed0dc16fc81 Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Wed, 16 Jul 2003 21:53:01 +0000
Subject: * Add support for IceCube board (with MGT5100 and MPC5200 CPUs)

* Add support for MGT5100 and MPC5200 processors
---
 cpu/mpc5xxx/speed.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 cpu/mpc5xxx/speed.c

(limited to 'cpu/mpc5xxx/speed.c')

diff --git a/cpu/mpc5xxx/speed.c b/cpu/mpc5xxx/speed.c
new file mode 100644
index 0000000..cb27779
--- /dev/null
+++ b/cpu/mpc5xxx/speed.c
@@ -0,0 +1,93 @@
+/*
+ * (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 <mpc5xxx.h>
+#include <asm/processor.h>
+
+/* ------------------------------------------------------------------------- */
+
+/* Bus-to-Core Multipliers */
+
+static int bus2core[] = {
+	0,  0,  0,  10, 20, 20, 25, 45,
+	30, 55, 40, 50, 0,  60, 35, 0,
+	30, 25, 65, 10, 70, 20, 75, 45,
+	0,  55, 40, 50, 80, 60, 35, 0
+};
+/* ------------------------------------------------------------------------- */
+
+/*
+ *
+ */
+
+int get_clocks (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	ulong val, vco;
+
+#if !defined(CFG_MPC5XXX_CLKIN)
+#error clock measuring not implemented yet - define CFG_MPC5XXX_CLKIN
+#endif
+
+	val = *(vu_long *)MPC5XXX_CDM_PORCFG;
+	if (val & (1 << 6)) {
+		vco = CFG_MPC5XXX_CLKIN * 12;
+	} else {
+		vco = CFG_MPC5XXX_CLKIN * 16;
+	}
+	if (val & (1 << 5)) {
+		gd->bus_clk = vco / 8;
+	} else {
+		gd->bus_clk = vco / 4;
+	}
+	gd->cpu_clk = gd->bus_clk * bus2core[val & 0x1f] / 10;
+
+	val = *(vu_long *)MPC5XXX_CDM_CFG;
+	if (val & (1 << 8)) {
+		gd->ipb_clk = gd->bus_clk / 2;
+	} else {
+		gd->ipb_clk = gd->bus_clk;
+	}
+	switch (val & 3) {
+		case 0: gd->pci_clk = gd->ipb_clk; break;
+		case 1: gd->pci_clk = gd->ipb_clk / 2; break;
+		default: gd->pci_clk = gd->bus_clk / 4; break;
+	}
+
+	return (0);
+}
+
+int prt_mpc5xxx_clks (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	printf("       Bus %ld MHz, IPB %ld MHz, PCI %ld MHz\n",
+			gd->bus_clk / 1000000, gd->ipb_clk / 1000000,
+			gd->pci_clk / 1000000);
+
+	return (0);
+}
+
+/* ------------------------------------------------------------------------- */
-- 
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