mirror of
https://github.com/fail0verflow/switch-coreboot.git
synced 2025-05-04 01:39:18 -04:00
6dc8cc1b19
coreboot-v2 only. This gets you guys a compiling v3 tree again. Sorry for the inconvenience. Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://coreboot.org/repository/coreboot-v3@1177 f3766cd6-281f-0410-b1cd-43a5c92072e9
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/*
|
|
* Erik Arjan Hendriks <hendriks@lanl.gov>
|
|
* Copyright (C) 2000 Scyld.
|
|
* Copyright (C) 2000 Scyld Computing Corporation
|
|
* Copyright (C) 2001 University of California. LA-CC Number 01-67.
|
|
* Copyright (C) 2005 Nick.Barker9@btinternet.com
|
|
* Copyright (C) 2007 coresystems GmbH
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
|
|
/* Declare a temporary global descriptor table -
|
|
* necessary because the core part of the bios
|
|
* no longer sets up any 16 bit segments
|
|
*/
|
|
|
|
__asm__ (
|
|
/* pointer to original gdt */
|
|
" .globl gdtarg\n"
|
|
"gdtarg: \n"
|
|
" .word gdt_limit \n"
|
|
#ifdef COREBOOT_V2
|
|
" .long gdt \n"
|
|
#else
|
|
" .long gdtptr \n"
|
|
#endif
|
|
|
|
/* compute the table limit */
|
|
"__mygdt_limit = __mygdt_end - __mygdt - 1 \n"
|
|
" .globl __mygdtaddr\n"
|
|
"__mygdtaddr: \n"
|
|
" .word __mygdt_limit \n"
|
|
" .long __mygdt \n"
|
|
|
|
" .globl __mygdt\n"
|
|
"__mygdt: \n"
|
|
/* selgdt 0, unused */
|
|
" .word 0x0000, 0x0000 \n"
|
|
" .byte 0x00, 0x00, 0x00, 0x00 \n"
|
|
|
|
/* selgdt 8, unused */
|
|
" .word 0x0000, 0x0000 \n"
|
|
" .byte 0x00, 0x00, 0x00, 0x00 \n"
|
|
|
|
/* selgdt 0x10, flat code segment */
|
|
" .word 0xffff, 0x0000 \n"
|
|
" .byte 0x00, 0x9b, 0xcf, 0x00 \n"
|
|
|
|
/* selgdt 0x18, flat data segment */
|
|
" .word 0xffff, 0x0000 \n"
|
|
" .byte 0x00, 0x93, 0xcf, 0x00 \n"
|
|
|
|
/* selgdt 0x20, unused */
|
|
" .word 0x0000, 0x0000 \n"
|
|
" .byte 0x00, 0x00, 0x00, 0x00 \n"
|
|
|
|
/* selgdt 0x28 16-bit 64k code at 0x00000000 */
|
|
" .word 0xffff, 0x0000 \n"
|
|
" .byte 0, 0x9a, 0, 0 \n"
|
|
|
|
/* selgdt 0x30 16-bit 64k data at 0x00000000 */
|
|
" .word 0xffff, 0x0000 \n"
|
|
" .byte 0, 0x92, 0, 0 \n"
|
|
|
|
"__mygdt_end: \n"
|
|
|
|
#ifndef COREBOOT_V2
|
|
/* FIXME: This does probably not belong here */
|
|
" .globl idtarg\n"
|
|
"idtarg:\n"
|
|
" .word _idt_end - _idt - 1\n" /* limit */
|
|
" .long _idt\n"
|
|
" .word 0\n"
|
|
"_idt:\n"
|
|
" .fill 20, 8, 0\n" // # idt is unitiailzed
|
|
"_idt_end:\n"
|
|
#endif
|
|
|
|
/* Declare a pointer to where our idt is going to be i.e. at mem zero */
|
|
" .globl __myidt\n"
|
|
"__myidt: \n"
|
|
/* 16-bit limit */
|
|
" .word 1023 \n"
|
|
/* 24-bit base */
|
|
" .long 0 \n"
|
|
" .word 0 \n"
|
|
);
|