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92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
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* (C) Copyright 2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm-mips/danube.h>
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/*******************************************************************************
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*
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* get_cpuclk - returns the frequency of the CPU.
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*
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* NOTE:
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* This functions should be used by the hardware driver to get the correct
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* frequency of the CPU.
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*/
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unsigned int danube_get_ddr_hz(void)
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{
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switch((*DANUBE_CGU_SYS) & 0x3){
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case 0:
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return 166666667;
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case 1:
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return 133333333;
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case 2:
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return 111111111;
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case 3:
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return 83333333;
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}
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}
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uint danube_get_cpuclk(void)
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{
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#ifdef CONFIG_USE_EMULATOR
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return EMULATOR_CPU_SPEED;
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#else //NOT CONFIG_USE_EMULATOR
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unsigned int ddr_clock=danube_get_ddr_hz();
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switch((*DANUBE_CGU_SYS) & 0xc){
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case 0:
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return 333333333;
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case 4:
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return ddr_clock;
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case 8:
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return ddr_clock << 1;
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default:
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break;
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/*reserved*/
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}
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#endif
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}
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uint danube_get_fpiclk(void)
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{
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#ifdef CONFIG_USE_EMULATOR
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unsigned int clkCPU;
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clkCPU = danube_get_cpu_hz();
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return clkCPU >> 2;
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#else //NOT CONFIG_USE_EMULATOR
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unsigned int ddr_clock=danube_get_ddr_hz();
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if ((*DANUBE_CGU_SYS) & 0x40){
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return ddr_clock >> 1;
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}
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return ddr_clock;
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#endif
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}
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