697927cc35
It is expected this will always be a casted get_top_of_ram() call on x86, no reason to do that under chipset. Change-Id: I3a49abe13ca44bf4ca1e26d1b3baf954bc5a29b7 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/3972 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@google.com>
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2004 Stefan Reinauer <stefan.reinauer@coreboot.org>
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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; version 2 of the License.
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <cbmem.h>
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#define CMOS_ADDR_PORT 0x70
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#define CMOS_DATA_PORT 0x71
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#define HIGH_RAM_ADDR 0x35
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#define LOW_RAM_ADDR 0x34
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#define HIGH_HIGHRAM_ADDR 0x5d
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#define MID_HIGHRAM_ADDR 0x5c
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#define LOW_HIGHRAM_ADDR 0x5b
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static unsigned long qemu_get_memory_size(void)
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{
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unsigned long tomk;
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outb (HIGH_RAM_ADDR, CMOS_ADDR_PORT);
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tomk = ((unsigned long) inb(CMOS_DATA_PORT)) << 14;
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outb (LOW_RAM_ADDR, CMOS_ADDR_PORT);
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tomk |= ((unsigned long) inb(CMOS_DATA_PORT)) << 6;
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tomk += 16 * 1024;
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return tomk;
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}
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unsigned long get_top_of_ram(void)
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{
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return qemu_get_memory_size() * 1024;
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}
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