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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2004 Stefan Reinauer <stefan.reinauer@coreboot.org>
*
* 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; version 2 of the License.
*
* 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.
*/
#include <cbmem.h>
#include <arch/io.h>
#include "memory.h"
#define CMOS_ADDR_PORT 0x70
#define CMOS_DATA_PORT 0x71
#define HIGH_RAM_ADDR 0x35
#define LOW_RAM_ADDR 0x34
#define HIGH_HIGHRAM_ADDR 0x5d
#define MID_HIGHRAM_ADDR 0x5c
#define LOW_HIGHRAM_ADDR 0x5b
unsigned long qemu_get_high_memory_size(void)
{
unsigned long high;
outb(HIGH_HIGHRAM_ADDR, CMOS_ADDR_PORT);
high = ((unsigned long) inb(CMOS_DATA_PORT)) << 22;
outb(MID_HIGHRAM_ADDR, CMOS_ADDR_PORT);
high |= ((unsigned long) inb(CMOS_DATA_PORT)) << 14;
outb(LOW_HIGHRAM_ADDR, CMOS_ADDR_PORT);
high |= ((unsigned long) inb(CMOS_DATA_PORT)) << 6;
return high;
}
unsigned long qemu_get_memory_size(void)
{
unsigned long tomk;
outb(HIGH_RAM_ADDR, CMOS_ADDR_PORT);
tomk = ((unsigned long) inb(CMOS_DATA_PORT)) << 14;
outb(LOW_RAM_ADDR, CMOS_ADDR_PORT);
tomk |= ((unsigned long) inb(CMOS_DATA_PORT)) << 6;
tomk += 16 * 1024;
return tomk;
}
void *cbmem_top(void)
{
return (void *) (qemu_get_memory_size() * 1024);
}
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