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| author | Aaron Durbin <adurbin@chromium.org> | 2013-02-15 23:26:52 -0600 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-03-21 22:59:40 +0100 |
| commit | de1f890186ce84963eb3dd1638784473193909c3 (patch) | |
| tree | 1ad9b1358d208bc338f4766a117fe5e076a84cef /src/include | |
| parent | 8ce667e50684bea7c60db43c0ca7dd1b3ec3fde3 (diff) | |
| download | coreboot-de1f890186ce84963eb3dd1638784473193909c3.tar.xz | |
coreboot: add caching loaded ramstage interface
Instead of hard coding the policy for how a relocated ramstage
image is saved add an interface. The interface consists of two
functions. cache_loaded_ramstage() and load_cached_ramstage()
are the functions to cache and load the relocated ramstage,
respectively. There are default implementations which cache and
load the relocated ramstage just below where the ramstage runs.
Change-Id: I4346e873d8543e7eee4c1cd484847d846f297bb0
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2805
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/cbfs.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/include/cbfs.h b/src/include/cbfs.h index 9bfe2ceb96..811df88884 100644 --- a/src/include/cbfs.h +++ b/src/include/cbfs.h @@ -83,5 +83,26 @@ int selfboot(struct lb_memory *mem, struct cbfs_payload *payload); /* Defined in individual arch / board implementation. */ int init_default_cbfs_media(struct cbfs_media *media); +#if CONFIG_RELOCATABLE_RAMSTAGE && defined(__PRE_RAM__) +/* The cache_loaded_ramstage() and load_cached_ramstage() functions are defined + * to be weak so that board and chipset code may override them. Their job is to + * cache and load the ramstage for quick S3 resume. By default a copy of the + * relocated ramstage is saved just below the running ramstage region. These + * functions are only valid during romstage. */ + +struct romstage_handoff; + +/* The implementer of cache_loaded_ramstage() needs to ensure that the + * reserve_* fields in in romstage_handoff reflect the memory footprint of the + * ramstage (including cached region). Note that the handoff variable can be + * NULL. */ +void __attribute__((weak)) +cache_loaded_ramstage(struct romstage_handoff *handoff, void *ramstage_base, + uint32_t ramstage_size, void *entry_point); +/* Return NULL on error or entry point on success. */ +void * __attribute__((weak)) +load_cached_ramstage(struct romstage_handoff *handoff); +#endif /* CONFIG_RELOCATABLE_RAMSTAGE */ + #endif |