mirror of
https://review.coreboot.org/flashrom.git
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137 lines
2.8 KiB
C
137 lines
2.8 KiB
C
/*
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* acpi_reset.c: Reboot your LinuxBIOS system with ACPI software watchdo
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*
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*
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* Copyright 2000 Silicon Integrated System Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* Reference:
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* 1. SiS 630 Specification
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*
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* $Id$
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <sys/io.h>
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#include <unistd.h>
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#include <stdio.h>
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unsigned short acpi_base;
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void
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waitsmbus()
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{
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unsigned short port = acpi_base;
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unsigned char val;
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//printf("waitsmb ..\n");
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for (val = inb(port); (val & 8) == 0; val = inb(port))
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;
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//printf("past first test\n");
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}
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void
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setsmbus(unsigned char index, unsigned char value)
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{
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unsigned short port = acpi_base + index;
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//printf("setsmbus: index 0x%02x, value 0x%02x\n",
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// index, value);
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outb(value, port);
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}
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unsigned char
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getsmbus(unsigned char index)
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{
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unsigned short port = acpi_base + index;
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unsigned char value;
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value = inb(port);
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//printf("getsmbus: index 0x%02x, value 0x%02x\n",
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// index, value);
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return value;
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}
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unsigned char
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read_spd(unsigned char slot, unsigned char index)
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{
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unsigned char value;
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setsmbus(0x03, 0x20);
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setsmbus(0x04, 0xA1 + (slot << 1));
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setsmbus(0x05, index);
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setsmbus(0x03, 0x12);
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waitsmbus();
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value = getsmbus(0x08);
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setsmbus(0x00, 0xFF);
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return value;
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}
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main()
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{
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unsigned char b;
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unsigned short w;
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/* get io privilege access PCI configuration space */
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if (iopl(3) != 0) {
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perror("Can not set io priviliage");
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exit(1);
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}
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/* Enable ACPI by set B7 on Reg 0x40, LPC */
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outl(0x80000840, 0x0cf8);
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b = inb(0x0cfc) | 0x80;
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outb(b, 0xcfc);
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/* get the ACPI base address for register 0x74,0x75 of LPC */
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outl(0x80000874, 0x0cf8);
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w = inw(0x0cfc);
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acpi_base = w + 0x80;
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printf("Number of bytes used by module manufacturer 0x%02x\n",
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read_spd(0x00, 0x00));
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printf("Memory Type 0x%02x\n",
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read_spd(0x00, 0x02));
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printf("Number of Row Address bits 0x%02x\n",
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read_spd(0x00, 0x03));
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printf("Number of Column Address bits 0x%02x\n",
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read_spd(0x00, 0x04));
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printf("Number of Sides 0x%02x\n",
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read_spd(0x00, 0x05));
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printf("Number of Banks 0x%02x\n",
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read_spd(0x00, 0x11));
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}
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