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authorKarthikeyan Ramasubramanian <kramasub@google.com>2022-10-04 10:08:15 -0600
committerKarthik Ramasubramanian <kramasub@google.com>2022-10-07 19:17:28 +0000
commitaea60bcd43d0b57313ed4ec20ff28f6877095e98 (patch)
tree920903f0ff91a895d071af78283af3374b32d1ee /util/msrtool/Makefile.in
parent93781523a5291bed1faf9f2d9cc5965f22f6c605 (diff)
mb/google/skyrim: Override SPI flash bus speed
Add configuration to bump up the SPI flash bus speed from 66 MHz to 100 MHz starting the board version where required schematics update is done. BUG=b:245949155 TEST=Build and boot to OS in Skyrim with 100 MHz SPI bus speed. Perform warm and cold reboot cycles for 100 iterations each. Observe that the boot time improved by ~115 ms compared to 66 MHz SPI flash bus speed. At 66 MHz: 508:finished loading body 538,319 (83,806) 11:start of bootblock 1,196,809 (624,777) 14:finished loading romstage 1,236,905 (39,163) 970:loading FSP-M 1,237,056 (37) 15:starting LZMA decompress (ignore for x86) 1,237,073 (17) 16:finished LZMA decompress (ignore for x86) 1,358,937 (121,864) 8:starting to load ramstage 2,010,304 (0) 15:starting LZMA decompress (ignore for x86) 2,010,312 (8) 16:finished LZMA decompress (ignore for x86) 2,067,181 (56,869) 971:loading FSP-S 2,078,232 (7,999) 17:starting LZ4 decompress (ignore for x86) 2,078,253 (21) 18:finished LZ4 decompress (ignore for x86) 2,084,297 (6,044) 90:starting to load payload 2,316,933 (5) 15:starting LZMA decompress (ignore for x86) 2,316,947 (14) 16:finished LZMA decompress (ignore for x86) 2,339,819 (22,872) Total Time: 2,464,338 At 100 MHz: 508:finished loading body 515,118 (59,364) 11:start of bootblock 1,115,043 (566,110) 14:finished loading romstage 1,146,713 (29,697) 970:loading FSP-M 1,146,865 (38) 15:starting LZMA decompress (ignore for x86) 1,146,881 (16) 16:finished LZMA decompress (ignore for x86) 1,249,351 (102,470) 8:starting to load ramstage 1,900,568 (1) 15:starting LZMA decompress (ignore for x86) 1,900,576 (8) 16:finished LZMA decompress (ignore for x86) 1,956,337 (55,761) 971:loading FSP-S 1,967,357 (7,930) 17:starting LZ4 decompress (ignore for x86) 1,967,377 (20) 18:finished LZ4 decompress (ignore for x86) 1,972,925 (5,548) 90:starting to load payload 2,205,300 (6) 15:starting LZMA decompress (ignore for x86) 2,205,313 (13) 16:finished LZMA decompress (ignore for x86) 2,227,087 (21,774) Total Time: 2,349,804 Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com> Change-Id: I5e8db22151fbc2db1f9e81b3644338348160736d Reviewed-on: https://review.coreboot.org/c/coreboot/+/68116 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jon Murphy <jpmurphy@google.com>
Diffstat (limited to 'util/msrtool/Makefile.in')
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