diff options
author | Gabe Black <gabeblack@chromium.org> | 2011-11-29 18:05:07 +0000 |
---|---|---|
committer | Graeme Russ <graeme.russ@gmail.com> | 2011-12-19 13:26:15 +1100 |
commit | ef5a5b004997a0759d6f5f3206a419f90d5ffac5 (patch) | |
tree | f22852e99dc7a86335e6745b216cd4a6a76b5db0 /board/chromebook-x86/coreboot/coreboot_start16.S | |
parent | 7b725f8485bcdd0be3cda40e435b783882bf18ec (diff) |
x86: Initial commit for running as a coreboot payload
Add a target for running u-boot as a coreboot payload in boards.cfg, a
board, CPU and a config. This is a skeleton implementation which always
reports the size of memory as 64 MB.
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Diffstat (limited to 'board/chromebook-x86/coreboot/coreboot_start16.S')
-rw-r--r-- | board/chromebook-x86/coreboot/coreboot_start16.S | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/board/chromebook-x86/coreboot/coreboot_start16.S b/board/chromebook-x86/coreboot/coreboot_start16.S new file mode 100644 index 00000000000..9ad06df8bc6 --- /dev/null +++ b/board/chromebook-x86/coreboot/coreboot_start16.S @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * (C) Copyright 2008 + * Graeme Russ, graeme.russ@gmail.com. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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; either version 2 of + * the License, or (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* + * 16bit initialization code. + * This code have to map the area of the boot flash + * that is used by U-boot to its final destination. + */ + +.text +.section .start16, "ax" +.code16 +.globl board_init16 +board_init16: + jmp board_init16_ret + +.section .bios, "ax" +.code16 +.globl realmode_reset +.hidden realmode_reset +.type realmode_reset, @function +realmode_reset: + +1: hlt + jmp 1 |