| /* |
| * 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> |
| |
| #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 |
| |
| static 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); |
| } |