1 files changed, 94 insertions, 0 deletions
diff --git a/u-boot/arch/powerpc/cpu/mpc5xxx/speed.c b/u-boot/arch/powerpc/cpu/mpc5xxx/speed.c
new file mode 100644
index 0000000..8027d3e
--- /dev/null
+++ b/u-boot/arch/powerpc/cpu/mpc5xxx/speed.c
@@ -0,0 +1,94 @@
+/*
+ * (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>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* ------------------------------------------------------------------------- */
+
+/* Bus-to-Core Multipliers */
+
+static int bus2core[] = {
+	3, 2, 2, 2, 4, 4, 5, 9,
+	6, 11, 8, 10, 3, 12, 7, 0,
+	6, 5, 13, 2, 14, 4, 15, 9,
+	0, 11, 8, 10, 16, 12, 7, 0
+};
+/* ------------------------------------------------------------------------- */
+
+/*
+ *
+ */
+
+int get_clocks (void)
+{
+	ulong val, vco;
+
+#if !defined(CONFIG_SYS_MPC5XXX_CLKIN)
+#error clock measuring not implemented yet - define CONFIG_SYS_MPC5XXX_CLKIN
+#endif
+
+	val = *(vu_long *)MPC5XXX_CDM_PORCFG;
+	if (val & (1 << 6)) {
+		vco = CONFIG_SYS_MPC5XXX_CLKIN * 12;
+	} else {
+		vco = CONFIG_SYS_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] / 2;
+
+	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)
+{
+	char buf1[32], buf2[32], buf3[32];
+
+	printf ("       Bus %s MHz, IPB %s MHz, PCI %s MHz\n",
+		strmhz(buf1, gd->bus_clk),
+		strmhz(buf2, gd->ipb_clk),
+		strmhz(buf3, gd->pci_clk)
+	);
+	return (0);
+}
+
+/* ------------------------------------------------------------------------- */