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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _STAGE_CACHE_H_
#define _STAGE_CACHE_H_
#include <romstage_handoff.h>
#include <stddef.h>
#include <stdint.h>
#include <program_loading.h>
/* Types of stages that may be stored in stage cache */
enum {
STAGE_RAMSTAGE,
STAGE_REFCODE,
STAGE_POSTCAR,
};
/* Types of raw data that may be stored in stage cache */
enum {
STAGE_S3_DATA,
};
#if CONFIG(TSEG_STAGE_CACHE) || CONFIG(CBMEM_STAGE_CACHE)
/* Cache the loaded stage provided according to the parameters. */
void stage_cache_add(int stage_id, const struct prog *stage);
/* Load the cached stage at given location returning the stage entry point. */
void stage_cache_load_stage(int stage_id, struct prog *stage);
/* Cache non-specific data or code. */
void stage_cache_add_raw(int stage_id, const void *base, const size_t size);
/* Get a pointer to cached raw data and its size. */
void stage_cache_get_raw(int stage_id, void **base, size_t *size);
#else /* CONFIG_NO_STAGE_CACHE */
static inline void stage_cache_add(int stage_id, const struct prog *stage) {}
static inline void stage_cache_load_stage(int stage_id, struct prog *stage) {}
static inline void stage_cache_add_raw(int stage_id, const void *base, const size_t size) {}
static inline void stage_cache_get_raw(int stage_id, void **base, size_t *size) {}
#endif
static inline int resume_from_stage_cache(void)
{
if (CONFIG(NO_STAGE_CACHE))
return 0;
/* TBD: Replace this with acpi_is_wakeup_s3(). */
return romstage_handoff_is_resume();
}
/* Fill in parameters for the external stage cache, if utilized. */
void stage_cache_external_region(void **base, size_t *size);
/* Metadata associated with each stage. */
struct stage_cache {
uint64_t load_addr;
uint64_t entry_addr;
uint64_t arg;
};
#endif /* _STAGE_CACHE_H_ */
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