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53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/*
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* Copyright (C) 2014 René Kijewski <rene.kijewski@fu-berlin.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @ingroup x86
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* @{
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*
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* @file
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* @brief Accessing the CMOS space of the BIOS.
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*
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* @author René Kijewski <rene.kijewski@fu-berlin.de>
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*
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* @}
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*/
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#include "x86_cmos.h"
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uint8_t x86_cmos_read(int reg)
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{
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outb(CMOS_ADDRESS, reg);
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io_wait();
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return inb(CMOS_DATA);
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}
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void x86_cmos_write(int reg, uint8_t value)
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{
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outb(CMOS_ADDRESS, reg);
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io_wait();
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outb(CMOS_DATA, value);
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}
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void x86_cmos_serial(uint8_t (*serial)[CMOS_SERIAL_LEN])
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{
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for (unsigned i = 0; i < CMOS_SERIAL_LEN; ++i) {
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(*serial)[i] = x86_cmos_read(CMOS_SERIAL_OFFS + i);
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}
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}
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