| /* |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #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; |
| } |
| |
| unsigned long get_top_of_ram(void); |
| unsigned long get_top_of_ram(void) |
| { |
| return qemu_get_memory_size() * 1024; |
| } |
| |
| #if !CONFIG_DYNAMIC_CBMEM |
| struct cbmem_entry *get_cbmem_toc(void) |
| { |
| return (struct cbmem_entry *)(get_top_of_ram() - HIGH_MEMORY_SIZE); |
| } |
| #else |
| void *cbmem_top(void) |
| { |
| /* Top of cbmem is at lowest usable DRAM address below 4GiB. */ |
| return (void *)get_top_of_ram(); |
| } |
| #endif |