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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 Intel Corporation.
*
* 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 <arch/ebda.h>
#include <compiler.h>
#include <intelblocks/ebda.h>
#include <string.h>
/*
* Mainboard Override function
*
* Mainboard directory may implement below functionality for romstage.
*/
/* Fill up EBDA structure inside Mainboard directory */
__weak void create_mainboard_ebda(struct ebda_config *cfg)
{
/* no-op */
}
static void create_soc_ebda(struct ebda_config *cfg)
{
/* Create EBDA header */
cfg->signature = EBDA_SIGNATURE;
/* Fill up memory layout information */
fill_soc_memmap_ebda(cfg);
}
void fill_ebda_area(void)
{
struct ebda_config ebda_cfg;
/* Initialize EBDA area early during romstage. */
setup_default_ebda();
create_soc_ebda(&ebda_cfg);
create_mainboard_ebda(&ebda_cfg);
write_ebda_data(&ebda_cfg, sizeof(ebda_cfg));
}
void retrieve_ebda_object(struct ebda_config *cfg)
{
read_ebda_data(cfg, sizeof(*cfg));
if (cfg->signature != EBDA_SIGNATURE)
memset(cfg, 0, sizeof(*cfg));
}
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