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/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdint.h>
#include <string.h>
#include <cbmem.h>
#include <console/console.h>
#include <romstage_handoff.h>
struct romstage_handoff {
/* Indicate if the current boot is an S3 resume. If
* CONFIG_RELOCTABLE_RAMSTAGE is enabled the chipset code is
* responsible for initializing this variable. Otherwise, ramstage
* will be re-loaded from cbfs (which can be slower since it lives
* in flash). */
uint8_t s3_resume;
uint8_t reboot_required;
uint8_t reserved[2];
};
static struct romstage_handoff *romstage_handoff_find_or_add(void)
{
struct romstage_handoff *handoff;
/* cbmem_add() first does a find and uses the old location before the
* real add. However, it is important to know when the structure is not
* found so it can be initialized to 0. */
handoff = cbmem_find(CBMEM_ID_ROMSTAGE_INFO);
if (handoff)
return handoff;
handoff = cbmem_add(CBMEM_ID_ROMSTAGE_INFO, sizeof(*handoff));
if (handoff != NULL)
memset(handoff, 0, sizeof(*handoff));
else
printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
return handoff;
}
int romstage_handoff_init(int is_s3_resume)
{
struct romstage_handoff *handoff;
handoff = romstage_handoff_find_or_add();
if (handoff == NULL)
return -1;
handoff->s3_resume = is_s3_resume;
return 0;
}
int romstage_handoff_is_resume(void)
{
struct romstage_handoff *handoff;
handoff = cbmem_find(CBMEM_ID_ROMSTAGE_INFO);
if (handoff == NULL)
return 0;
return handoff->s3_resume;
}
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