2 * Copyright 2004 Freescale Semiconductor.
4 * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
6 * (C) Copyright 2000-2002
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 #include <asm/processor.h>
32 DECLARE_GLOBAL_DATA_PTR;
34 /* used in some defintiions of CONFIG_SYS_CLK_FREQ */
35 extern unsigned long get_board_sys_clk(unsigned long dummy);
37 void get_sys_info(sys_info_t *sysInfo)
39 volatile immap_t *immap = (immap_t *) CFG_IMMR;
40 volatile ccsr_gur_t *gur = &immap->im_gur;
41 uint plat_ratio, e600_ratio;
43 plat_ratio = (gur->porpllsr) & 0x0000003e;
48 sysInfo->freqSystemBus = 16 * CONFIG_SYS_CLK_FREQ;
60 sysInfo->freqSystemBus = plat_ratio * CONFIG_SYS_CLK_FREQ;
63 sysInfo->freqSystemBus = 0;
67 e600_ratio = (gur->porpllsr) & 0x003f0000;
72 sysInfo->freqProcessor = 2 * sysInfo->freqSystemBus;
75 sysInfo->freqProcessor = 5 * sysInfo->freqSystemBus / 2;
78 sysInfo->freqProcessor = 3 * sysInfo->freqSystemBus;
81 sysInfo->freqProcessor = 7 * sysInfo->freqSystemBus / 2;
84 sysInfo->freqProcessor = 4 * sysInfo->freqSystemBus;
87 sysInfo->freqProcessor = 9 * sysInfo->freqSystemBus / 2;
90 sysInfo->freqProcessor = e600_ratio + sysInfo->freqSystemBus;
97 * Measure CPU clock speed (core clock GCLK1, GCLK2)
98 * (Approx. GCLK frequency in Hz)
105 get_sys_info(&sys_info);
106 gd->cpu_clk = sys_info.freqProcessor;
107 gd->bus_clk = sys_info.freqSystemBus;
109 if (gd->cpu_clk != 0)
118 * Return system bus freq in Hz
121 ulong get_bus_freq(ulong dummy)
126 get_sys_info(&sys_info);
127 val = sys_info.freqSystemBus;