diff options
Diffstat (limited to 'src/arch/x86/lib/mmap_boot.c')
-rw-r--r-- | src/arch/x86/lib/mmap_boot.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/arch/x86/lib/mmap_boot.c b/src/arch/x86/lib/mmap_boot.c new file mode 100644 index 0000000000..eb7b23e2b1 --- /dev/null +++ b/src/arch/x86/lib/mmap_boot.c @@ -0,0 +1,31 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2015 Google Inc. + * + * 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. + */ + +#include <boot_device.h> + +/* The ROM is memory mapped just below 4GiB. Form a pointer for the base. */ +#define rom_base ((void *)(uintptr_t)(-(int32_t)CONFIG_ROM_SIZE)) + +static const struct mem_region_device boot_dev = + MEM_REGION_DEV_INIT(rom_base, CONFIG_ROM_SIZE); + +const struct region_device *boot_device_ro(void) +{ + return &boot_dev.rdev; +} |