/* * Copyright 2004 Freescale Semiconductor. * (C) Copyright 2003 Motorola Inc. * Xianghua Xiao, (X.Xiao@motorola.com) * * (C) Copyright 2000 * 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 <ppc_asm.tmpl> #include <asm/processor.h> DECLARE_GLOBAL_DATA_PTR; /* --------------------------------------------------------------- */ void get_sys_info (sys_info_t * sysInfo) { volatile immap_t *immap = (immap_t *)CFG_IMMR; volatile ccsr_gur_t *gur = &immap->im_gur; uint plat_ratio,e500_ratio,half_freqSystemBus; plat_ratio = (gur->porpllsr) & 0x0000003e; plat_ratio >>= 1; sysInfo->freqSystemBus = plat_ratio * CONFIG_SYS_CLK_FREQ; e500_ratio = (gur->porpllsr) & 0x003f0000; e500_ratio >>= 16; /* Divide before multiply to avoid integer * overflow for processor speeds above 2GHz */ half_freqSystemBus = sysInfo->freqSystemBus/2; sysInfo->freqProcessor = e500_ratio*half_freqSystemBus; } int get_clocks (void) { sys_info_t sys_info; #if defined(CONFIG_CPM2) volatile immap_t *immap = (immap_t *) CFG_IMMR; uint sccr, dfbrg; /* set VCO = 4 * BRG */ immap->im_cpm.im_cpm_intctl.sccr &= 0xfffffffc; sccr = immap->im_cpm.im_cpm_intctl.sccr; dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT; #endif get_sys_info (&sys_info); gd->cpu_clk = sys_info.freqProcessor; gd->bus_clk = sys_info.freqSystemBus; #if defined(CONFIG_CPM2) gd->vco_out = 2*sys_info.freqSystemBus; gd->cpm_clk = gd->vco_out / 2; gd->scc_clk = gd->vco_out / 4; gd->brg_clk = gd->vco_out / (1 << (2 * (dfbrg + 1))); #endif if(gd->cpu_clk != 0) return (0); else return (1); } /******************************************** * get_bus_freq * return system bus freq in Hz *********************************************/ ulong get_bus_freq (ulong dummy) { ulong val; sys_info_t sys_info; get_sys_info (&sys_info); val = sys_info.freqSystemBus; return val; }