mirror of
https://github.com/fail0verflow/switch-coreboot.git
synced 2025-05-04 01:39:18 -04:00
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/*
|
|
* acpi_reset.c: Reboot your LinuxBIOS system with ACPI software watchdo
|
|
*
|
|
*
|
|
* Copyright 2000 Silicon Integrated System Corporation
|
|
*
|
|
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*
|
|
* Reference:
|
|
* 1. SiS 630 Specification
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/io.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
|
|
main()
|
|
{
|
|
unsigned char b;
|
|
unsigned short w;
|
|
unsigned short acpi_base;
|
|
|
|
/* get io privilege access PCI configuration space */
|
|
if (iopl(3) != 0) {
|
|
perror("Can not set io priviliage");
|
|
exit(1);
|
|
}
|
|
|
|
/* Enable ACPI by set B7 on Reg 0x40, LPC */
|
|
outl(0x80000840, 0x0cf8);
|
|
b = inb(0x0cfc) | 0x80;
|
|
outb(b, 0xcfc);
|
|
|
|
/* get the ACPI base address for register 0x74,0x75 of LPC */
|
|
outl(0x80000874, 0x0cf8);
|
|
w = inw(0x0cfc);
|
|
acpi_base = w;
|
|
|
|
printf ("acpi base: %x\n", acpi_base);
|
|
|
|
/* Set software watchdog timer init value */
|
|
outb(0x03, 0x4a + acpi_base);
|
|
|
|
/* Software watchdog enable, issue PCIRST# when time expire */
|
|
outb(0x8f, 0x4b + acpi_base);
|
|
}
|