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Diffstat (limited to 'src/northbridge/via/vx900/romstrap.S')
-rw-r--r-- | src/northbridge/via/vx900/romstrap.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/northbridge/via/vx900/romstrap.S b/src/northbridge/via/vx900/romstrap.S new file mode 100644 index 0000000000..26c1ee694a --- /dev/null +++ b/src/northbridge/via/vx900/romstrap.S @@ -0,0 +1,56 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2004 Tyan Computer + * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer) + * Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz> + * Copyright (C) 2009 One Laptop per Child, Association, Inc. + * Copyright (C) 2011-2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> + * + * 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. + */ + +/* As extracted from the manufacturer's ROM, the romstrap table looks like: + * .long 0x77886047 .long 0x00777777 + * .long 0x00000000 .long 0x00000000 + * .long 0x00888888 .long 0x00AA1111 + * .long 0x00000000 .long 0x00000000 + * + * The vendor BIOS then adjusts some of these settings very early on. Instead of + * adjusting those settings in code, we work them in the romstrap table. + * + */ +/* This file constructs the ROM strap table for VX900 */ + + .section ".romstrap", "a", @progbits + + .globl __romstrap_start +__romstrap_start: +tblpointer: + .long 0x77886047 + .long 0x00777777 + .long 0x00000000 + .long 0x00000000 + .long 0x00888888 + .long 0x00AA1111 + .long 0x00000000 + .long 0x00000000 + +/* + * The pointer to above table should be at 0xffffffd0, + * the table itself MUST be aligned to 128B it seems! + */ +rspointers: + .long tblpointer // It will be 0xffffffd0 + + .globl __romstrap_end + +__romstrap_end: +.previous |