mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 09:48:16 +00:00
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Marius Groeger <mgroeger@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Alex Zuepke <azu@sysgo.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
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <asm/interrupt.h>
|
|
|
|
int cpu_init_f(void)
|
|
{
|
|
/* initialize FPU, reset EM, set MP and NE */
|
|
asm ("fninit\n" \
|
|
"movl %cr0, %eax\n" \
|
|
"andl $~0x4, %eax\n" \
|
|
"orl $0x22, %eax\n" \
|
|
"movl %eax, %cr0\n" );
|
|
|
|
return 0;
|
|
}
|
|
|
|
int cpu_init_r(void)
|
|
{
|
|
/* Initialize core interrupt and exception functionality of CPU */
|
|
cpu_init_interrupts ();
|
|
return 0;
|
|
}
|
|
|
|
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
|
|
{
|
|
printf ("resetting ...\n");
|
|
udelay(50000); /* wait 50 ms */
|
|
disable_interrupts();
|
|
reset_cpu(0);
|
|
|
|
/*NOTREACHED*/
|
|
return 0;
|
|
}
|
|
|
|
void flush_cache (unsigned long dummy1, unsigned long dummy2)
|
|
{
|
|
asm("wbinvd\n");
|
|
return;
|
|
}
|
|
|
|
void __attribute__ ((regparm(0))) generate_gpf(void);
|
|
|
|
/* segment 0x70 is an arbitrary segment which does not exist */
|
|
asm(".globl generate_gpf\n"
|
|
".hidden generate_gpf\n"
|
|
".type generate_gpf, @function\n"
|
|
"generate_gpf:\n"
|
|
"ljmp $0x70, $0x47114711\n");
|
|
|
|
void __reset_cpu(ulong addr)
|
|
{
|
|
printf("Resetting using i386 Triple Fault\n");
|
|
set_vector(13, generate_gpf); /* general protection fault handler */
|
|
set_vector(8, generate_gpf); /* double fault handler */
|
|
generate_gpf(); /* start the show */
|
|
}
|
|
void reset_cpu(ulong addr) __attribute__((weak, alias("__reset_cpu")));
|