92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
/*
|
|
* (C) Copyright 2000-2003
|
|
* 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
|
|
*/
|
|
|
|
/*
|
|
* CPU specific code for the MPC8220 CPUs
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <watchdog.h>
|
|
#include <command.h>
|
|
#include <mpc8220.h>
|
|
#include <asm/processor.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
int checkcpu (void)
|
|
{
|
|
ulong clock = gd->cpu_clk;
|
|
char buf[32];
|
|
|
|
puts ("CPU: ");
|
|
|
|
printf (CPU_ID_STR);
|
|
|
|
printf (" (JTAG ID %08lx)", *(vu_long *) (CFG_MBAR + 0x50));
|
|
|
|
printf (" at %s MHz\n", strmhz (buf, clock));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
|
|
{
|
|
volatile gptmr8220_t *gptmr = (volatile gptmr8220_t *) MMAP_GPTMR;
|
|
ulong msr;
|
|
|
|
/* Interrupts and MMU off */
|
|
__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
|
|
|
|
msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
|
|
__asm__ __volatile__ ("mtmsr %0"::"r" (msr));
|
|
|
|
/* Charge the watchdog timer */
|
|
gptmr->Prescl = 10;
|
|
gptmr->Count = 1;
|
|
|
|
gptmr->Mode = GPT_TMS_SGPIO;
|
|
|
|
gptmr->Control = GPT_CTRL_WDEN | GPT_CTRL_CE;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Get timebase clock frequency (like cpu_clk in Hz)
|
|
*
|
|
*/
|
|
unsigned long get_tbclk (void)
|
|
{
|
|
ulong tbclk;
|
|
|
|
tbclk = (gd->bus_clk + 3L) / 4L;
|
|
|
|
return (tbclk);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|