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- /*
- * (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);
- }
- /* ------------------------------------------------------------------------- */
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