diff options
Diffstat (limited to 'src/mainboard/emulation/qemu-i440fx/memory.c')
-rw-r--r-- | src/mainboard/emulation/qemu-i440fx/memory.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/mainboard/emulation/qemu-i440fx/memory.c b/src/mainboard/emulation/qemu-i440fx/memory.c new file mode 100644 index 0000000000..322fc492ec --- /dev/null +++ b/src/mainboard/emulation/qemu-i440fx/memory.c @@ -0,0 +1,47 @@ +/* + * 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 + +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; +} + +struct cbmem_entry *get_cbmem_toc(void) +{ + return (struct cbmem_entry *)(get_top_of_ram() - HIGH_MEMORY_SIZE); +} |