mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-13 16:37:30 +00:00
3a473b2a65
Add support for the Marvell DB64360 / DB64460 development boards * Patch by Detlev Zundel, 10 Dec 2003: fix dependency problem in examples/Makefile
137 lines
3.4 KiB
C
137 lines
3.4 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>
|
|
|
|
#ifdef CONFIG_AMIGAONEG3SE
|
|
#include "../board/MAI/AmigaOneG3SE/via686.h"
|
|
#endif
|
|
|
|
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 */
|
|
};
|
|
|
|
static const int hid1_fx_multipliers_x_10[] = {
|
|
00, /* 0000 - off */
|
|
00, /* 0001 - off */
|
|
10, /* 0010 - bypass */
|
|
10, /* 0011 - bypass */
|
|
20, /* 0100 - 2x */
|
|
25, /* 0101 - 2.5x */
|
|
30, /* 0110 - 3x */
|
|
35, /* 0111 - 3.5x */
|
|
40, /* 1000 - 4x */
|
|
45, /* 1001 - 4.5x */
|
|
50, /* 1010 - 5x */
|
|
55, /* 1011 - 5.5x */
|
|
60, /* 1100 - 6x */
|
|
65, /* 1101 - 6.5x */
|
|
70, /* 1110 - 7x */
|
|
75, /* 1111 - 7.5 */
|
|
80, /* 10000 - 8x */
|
|
85, /* 10001 - 8.5x */
|
|
90, /* 10010 - 9x */
|
|
95, /* 10011 - 9.5x */
|
|
100, /* 10100 - 10x */
|
|
110, /* 10101 - 11x */
|
|
120, /* 10110 - 12x */
|
|
};
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Measure CPU clock speed (core clock GCLK1, GCLK2)
|
|
*
|
|
* (Approx. GCLK frequency in Hz)
|
|
*/
|
|
|
|
int get_clocks (void)
|
|
{
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
ulong clock = 0;
|
|
|
|
/* calculate the clock frequency based upon the CPU type */
|
|
switch (get_cpu_type()) {
|
|
case CPU_7455:
|
|
case CPU_7457:
|
|
/*
|
|
* It is assumed that the PLL_EXT line is zero.
|
|
* Make sure division is done before multiplication to prevent 32-bit
|
|
* arithmetic overflows which will cause a negative number
|
|
*/
|
|
clock = (CFG_BUS_CLK / 10) * hid1_multipliers_x_10[(get_hid1 () >> 13) & 0xF];
|
|
break;
|
|
|
|
case CPU_750GX:
|
|
case CPU_750FX:
|
|
clock = CFG_BUS_CLK * hid1_fx_multipliers_x_10[get_hid1 () >> 27] / 10;
|
|
break;
|
|
|
|
case CPU_7450:
|
|
case CPU_740:
|
|
case CPU_740P:
|
|
case CPU_745:
|
|
case CPU_750CX:
|
|
case CPU_750:
|
|
case CPU_750P:
|
|
case CPU_755:
|
|
case CPU_7400:
|
|
case CPU_7410:
|
|
/*
|
|
* Make sure division is done before multiplication to prevent 32-bit
|
|
* arithmetic overflows which will cause a negative number
|
|
*/
|
|
clock = (CFG_BUS_CLK / 10) * hid1_multipliers_x_10[get_hid1 () >> 28];
|
|
break;
|
|
|
|
case CPU_UNKNOWN:
|
|
printf ("get_gclk_freq(): unknown CPU type\n");
|
|
clock = 0;
|
|
return (1);
|
|
}
|
|
|
|
gd->cpu_clk = clock;
|
|
gd->bus_clk = CFG_BUS_CLK;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|