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/*
* This file is part of the coreboot project.
*
* 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 <stdlib.h>
#include <cbmem.h>
#include <arch/acpi.h>
#if IS_ENABLED(CONFIG_CBMEM_TOP_BACKUP)
void *cbmem_top(void)
{
static void *cbmem_top_backup;
void *top_backup;
if (ENV_RAMSTAGE && cbmem_top_backup != NULL)
return cbmem_top_backup;
/* Top of CBMEM is at highest usable DRAM address below 4GiB. */
top_backup = (void *)restore_top_of_low_cacheable();
if (ENV_RAMSTAGE)
cbmem_top_backup = top_backup;
return top_backup;
}
#endif /* CBMEM_TOP_BACKUP */
/* Something went wrong, our high memory area got wiped */
void cbmem_fail_resume(void)
{
#if !defined(__PRE_RAM__) && IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)
/* ACPI resume needs to be cleared in the fail-to-recover case, but that
* condition is only handled during ramstage. */
acpi_fail_wakeup();
#endif
}
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