diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2016-09-16 11:15:49 -0500 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2016-09-19 17:01:23 +0200 |
| commit | dfe614ff9fea97b712e10f4977f2343a1f070d3e (patch) | |
| tree | db355bc28a591a235d975c408ec540731ce9db8d /src/soc/intel/apollolake/romstage.c | |
| parent | be5492aec0a02e416cf12a7ad7517900540d9991 (diff) | |
soc/intel/apollolake: cache boot media post romstage
When the boot media is memory mapped mark it as cacheable
after romstage. Otherwise the boot media is uncacheable and
all loads from it take longer. Loading FSP-S alone in ramstage
went down to 17.5ms from 54ms.
BUG=chrome-os-partner:56656
Change-Id: I6703334ba8fe98aca26ba1c995d6d3abb0ddef33
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/16613
Reviewed-by: Andrey Petrov <andrey.petrov@intel.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/soc/intel/apollolake/romstage.c')
| -rw-r--r-- | src/soc/intel/apollolake/romstage.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/romstage.c b/src/soc/intel/apollolake/romstage.c index ebd6287e4a..b9733defa3 100644 --- a/src/soc/intel/apollolake/romstage.c +++ b/src/soc/intel/apollolake/romstage.c @@ -130,6 +130,11 @@ asmlinkage void car_stage_entry(void) assert(ALIGN_DOWN(top_of_ram, 16*MiB) == top_of_ram); postcar_frame_add_mtrr(&pcf, top_of_ram - 16*MiB, 16*MiB, MTRR_TYPE_WRBACK); + /* Cache the memory-mapped boot media. */ + if (IS_ENABLED(CONFIG_BOOT_DEVICE_MEMORY_MAPPED)) + postcar_frame_add_mtrr(&pcf, -CONFIG_ROM_SIZE, CONFIG_ROM_SIZE, + MTRR_TYPE_WRPROT); + run_postcar_phase(&pcf); } |