mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 17:58:23 +00:00
76 lines
2 KiB
C
76 lines
2 KiB
C
/*
|
|
* (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 <74xx_7xx.h>
|
|
#include <asm/processor.h>
|
|
|
|
static const int hid1_multipliers_x_10[] = {
|
|
25, /* 0000 - 2.5x */
|
|
75, /* 0001 - 7.5x */
|
|
70, /* 0010 - 7x */
|
|
10, /* 0011 - bypass */
|
|
20, /* 0100 - 2x */
|
|
65, /* 0101 - 6.5x */
|
|
100, /* 0110 - 10x */
|
|
45, /* 0111 - 4.5x */
|
|
30, /* 1000 - 3x */
|
|
55, /* 1001 - 5.5x */
|
|
40, /* 1010 - 4x */
|
|
50, /* 1011 - 5x */
|
|
80, /* 1100 - 8x */
|
|
60, /* 1101 - 6x */
|
|
35, /* 1110 - 3.5x */
|
|
0 /* 1111 - off */
|
|
};
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Measure CPU clock speed (core clock GCLK1, GCLK2)
|
|
*
|
|
* (Approx. GCLK frequency in Hz)
|
|
*/
|
|
|
|
int get_clocks (void)
|
|
{
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
ulong clock = CFG_BUS_CLK * \
|
|
hid1_multipliers_x_10[get_hid1 () >> 28] / 10;
|
|
gd->cpu_clk = clock;
|
|
gd->bus_clk = CFG_BUS_CLK;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
#if 0 /* disabled XXX - use global data instead */
|
|
ulong get_bus_freq (ulong gclk_freq)
|
|
{
|
|
return CFG_BUS_CLK;
|
|
}
|
|
#endif /* 0 */
|
|
|
|
/* ------------------------------------------------------------------------- */
|