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lib/stage_cache: Add save/get raw storage

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Leverage the stage_cache mechanism to store a non-specific type
of data.  This is not interesting when the location for the cache
is in cbmem.  However it will be more useful when an external
location is used, e.g. when the cache is in TSEG, locked from user
modification.

Change-Id: Iaf0b25ebe14c176bbd24fc8942f902f627ca8e6f
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/23518
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Marshall Dawson
2018-01-30 15:33:23 -07:00
committed by Martin Roth
parent ac1cd44525
commit 8d6e0e0a72
4 changed files with 81 additions and 0 deletions
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10
src/include/stage_cache.h
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@@ -20,14 +20,24 @@
#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,
};
/* Cache the loaded stage provided according to the parameters. */
void stage_cache_add(int stage_id, const 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);
/* Load the cached stage at given location returning the stage entry point. */
void stage_cache_load_stage(int stage_id, struct prog *stage);
/* Fill in parameters for the external stage cache, if utilized. */