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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com>
* Copyright (C) 2007-2008 coresystems GmbH
* Copyright (C) 2018 Patrick Rudolph <siro@das-labor.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.
*/
#include <cpu/x86/cache.h>
#include <cpu/x86/post_code.h>
.global bootblock_pre_c_entry
bootblock_pre_c_entry:
cache_as_ram:
post_code(0x20)
/*
* Nothing to do here on qemu, RAM works just fine without any
* initialization.
*/
post_code(0x21)
movl $_car_stack_end, %esp
/* Align the stack and keep aligned for call to bootblock_c_entry() */
and $0xfffffff0, %esp
sub $12, %esp
/* Clear the cache memory region. This will also clear CAR GLOBAL */
movl $_car_region_start, %esi
movl %esi, %edi
movl $_car_region_end, %ecx
sub $_car_region_start, %ecx
shr $2, %ecx
xorl %eax, %eax
rep stosl
/* Restore the BIST result and timestamps. */
movd %mm0, %ebx
movd %mm1, %eax
movd %mm2, %edx
pushl %ebx
pushl %edx
pushl %eax
before_c_entry:
post_code(0x29)
call bootblock_c_entry_bist
/* Never returns */
.Lhlt:
post_code(POST_DEAD_CODE)
hlt
jmp .Lhlt
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