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authorAaron Durbin <adurbin@chromium.org>2014-02-25 20:36:56 -0600
committerAaron Durbin <adurbin@google.com>2014-03-07 15:30:27 +0100
commitc34713d33e088095acb6dd61527a26117d9c368e (patch)
tree020c5387801605f753fca25cc6b2c09ff5763e30 /src/include/payload_loader.h
parent7274800ea37edf41cb50e899d03baa02bdeecade (diff)
x86: add MIRROR_PAYLOAD_TO_RAM_BEFORE_LOADING option
Boot speeds can be sped up by mirroring the payload into main memory before doing the actual loading. Systems that would benefit from this are typically Intel ones whose SPI are memory mapped. Without the SPI being cached all accesses to the payload in SPI while being loaded result in uncacheable accesses. Instead take advantage of the on-board SPI controller which has an internal cache and prefetcher by copying 64-byte cachelines using 32-bit word copies. Change-Id: I4aac856b1b5130fa2d68a6c45a96cfeead472a52 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/5305 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Diffstat (limited to 'src/include/payload_loader.h')
-rw-r--r--src/include/payload_loader.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/include/payload_loader.h b/src/include/payload_loader.h
index 7ef5806751..7a3f045f1c 100644
--- a/src/include/payload_loader.h
+++ b/src/include/payload_loader.h
@@ -44,6 +44,9 @@ struct payload *payload_load(void);
/* Run the loaded payload. */
void payload_run(const struct payload *payload);
+/* Mirror the payload to be loaded. */
+void mirror_payload(struct payload *payload);
+
/* architecture specific function to run payload. */
void arch_payload_run(const struct payload *payload);