diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2021-11-05 10:29:24 -0600 |
|---|---|---|
| committer | Raul Rangel <rrangel@chromium.org> | 2021-11-16 21:45:36 +0000 |
| commit | b25576fa6368f288f1ce3e34f87894d6cd3859d1 (patch) | |
| tree | a91cc47dba05934a3a94da0070327f556afda75a /src | |
| parent | 571e7f02de2d9e4047c28ace45430a777252cba3 (diff) | |
src/lib/prog_loaders: Add preload_ramstage
This will enable preloading ramstage. By preloading the file into
cbfs_cache we reduce boot time.
BUG=b:179699789
TEST=Boot guybrush to OS and see 12ms reduction in boot time.
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: Ibe12de806449da25bc0033b02fcb97c3384eddc1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58982
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/program_loading.h | 7 | ||||
| -rw-r--r-- | src/lib/prog_loaders.c | 8 |
2 files changed, 15 insertions, 0 deletions
diff --git a/src/include/program_loading.h b/src/include/program_loading.h index 5b9a94df06..ba42465046 100644 --- a/src/include/program_loading.h +++ b/src/include/program_loading.h @@ -145,6 +145,13 @@ int legacy_romstage_select_and_load(struct prog *romstage); * RAMSTAGE LOADING * ************************/ +/* + * Asynchronously preloads ramstage. + * + * This should be called early on to allow ramstage to load before + * `run_ramstage` is called. + */ +void preload_ramstage(void); /* Run ramstage from romstage. */ void run_ramstage(void); diff --git a/src/lib/prog_loaders.c b/src/lib/prog_loaders.c index 8ad646a10c..878f729ef9 100644 --- a/src/lib/prog_loaders.c +++ b/src/lib/prog_loaders.c @@ -75,7 +75,15 @@ static int load_relocatable_ramstage(struct prog *ramstage) return rmodule_stage_load(&rmod_ram); } +void preload_ramstage(void) +{ + if (!CONFIG(CBFS_PRELOAD)) + return; + printk(BIOS_DEBUG, "Preloading ramstage\n"); + + cbfs_preload(CONFIG_CBFS_PREFIX "/ramstage"); +} void run_ramstage(void) { struct prog ramstage = |