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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
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <cpu/x86/stack.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/post_code.h>
#include <cbmem.h>
#define CACHE_AS_RAM_SIZE 0x10000
#define CACHE_AS_RAM_BASE 0xd0000
#define CPU_PHYSMASK_HI (1 << (CONFIG_CPU_ADDR_BITS - 32) - 1)
/* Save the BIST result. */
movl %eax, %ebp
cache_as_ram:
post_code(0x20)
/* Clear the cache memory region. This will also fill up the cache */
movl $CACHE_AS_RAM_BASE, %esi
movl %esi, %edi
movl $(CACHE_AS_RAM_SIZE / 4), %ecx
// movl $0x23322332, %eax
xorl %eax, %eax
rep stosl
post_code(0x21)
/* Set up the stack pointer. */
movl $(CACHE_AS_RAM_SIZE + CACHE_AS_RAM_BASE - 4), %eax
movl %eax, %esp
/* Restore the BIST result. */
movl %ebp, %eax
movl %esp, %ebp
pushl %eax
before_romstage:
post_code(0x29)
/* Call romstage.c main function. */
call main
post_code(0x30)
#if CONFIG_HAVE_ACPI_RESUME
movl CBMEM_BOOT_MODE, %eax
cmpl $0x2, %eax // Resume?
jne __acpi_resume_backup_done
/* copy 1MB - 64K to high tables ram_base to prevent memory corruption
* through stage 2. We could keep stuff like stack and heap in high
* tables memory completely, but that's a wonderful clean up task for
* another day.
*/
cld
movl $CONFIG_RAMBASE, %esi
movl CBMEM_RESUME_BACKUP, %edi
movl $HIGH_MEMORY_SAVE / 4, %ecx
rep movsl
__acpi_resume_backup_done:
#endif
post_code(0x3d)
__main:
post_code(POST_PREPARE_RAMSTAGE)
cld /* Clear direction flag. */
movl $ROMSTAGE_STACK, %esp
movl %esp, %ebp
call copy_and_run
.Lhlt:
post_code(POST_DEAD_CODE)
hlt
jmp .Lhlt
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