2 * Copyright 2004 Freescale Semiconductor.
3 * (C) Copyright 2003 Motorola Inc.
4 * Xianghua Xiao, (X.Xiao@motorola.com)
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,
29 #include <ppc_asm.tmpl>
30 #include <asm/processor.h>
32 DECLARE_GLOBAL_DATA_PTR;
34 /* --------------------------------------------------------------- */
36 void get_sys_info (sys_info_t * sysInfo)
38 volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR);
39 uint plat_ratio,e500_ratio,half_freqSystemBus;
41 plat_ratio = (gur->porpllsr) & 0x0000003e;
43 sysInfo->freqSystemBus = plat_ratio * CONFIG_SYS_CLK_FREQ;
44 e500_ratio = (gur->porpllsr) & 0x003f0000;
47 /* Divide before multiply to avoid integer
48 * overflow for processor speeds above 2GHz */
49 half_freqSystemBus = sysInfo->freqSystemBus/2;
50 sysInfo->freqProcessor = e500_ratio*half_freqSystemBus;
57 #if defined(CONFIG_CPM2)
58 volatile immap_t *immap = (immap_t *) CFG_IMMR;
61 /* set VCO = 4 * BRG */
62 immap->im_cpm.im_cpm_intctl.sccr &= 0xfffffffc;
63 sccr = immap->im_cpm.im_cpm_intctl.sccr;
64 dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT;
66 get_sys_info (&sys_info);
67 gd->cpu_clk = sys_info.freqProcessor;
68 gd->bus_clk = sys_info.freqSystemBus;
69 #if defined(CONFIG_CPM2)
70 gd->vco_out = 2*sys_info.freqSystemBus;
71 gd->cpm_clk = gd->vco_out / 2;
72 gd->scc_clk = gd->vco_out / 4;
73 gd->brg_clk = gd->vco_out / (1 << (2 * (dfbrg + 1)));
76 if(gd->cpu_clk != 0) return (0);
81 /********************************************
83 * return system bus freq in Hz
84 *********************************************/
85 ulong get_bus_freq (ulong dummy)
91 get_sys_info (&sys_info);
92 val = sys_info.freqSystemBus;