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