From 6abee842504bc41e1915d19588edeb62d3e0dca7 Mon Sep 17 00:00:00 2001 From: Karthikeyan Ramasubramanian Date: Tue, 16 Jun 2020 23:29:28 -0600 Subject: soc/intel/tigerlake: Enable FSP-S compression Use LZ4 compression technique to compress FSP-S. This provides some SPI ROM space savings (~36 KiB) in each CBFS. FSP-M is XIP and hence not compressed. LZ4 is chosen over LZMA since the decompression saves ~25 ms for an extra overhead of ~1KiB. LZ4 Compression: fsps.bin 0xe6fc0 fsp 254262 LZ4 (290816 decompressed) LZ4 Decompression: 17:starting LZ4 decompress (ignore for x86) 712,361 (1,072) 18:finished LZ4 decompress (ignore for x86) 750,695 (38,334) LZMA Compression: fsps.bin 0xe6fc0 fsp 253415 LZMA (290816 decompressed) LZMA Decompression: 15:starting LZMA decompress (ignore for x86) 707,696 (1,150) 16:finished LZMA decompress (ignore for x86) 767,763 (60,067) BUG=b:158034451 TEST=Build and boot volteer mainboard. Change-Id: I91e33eb7b688b5383f3a0075a28ac21250314973 Signed-off-by: Karthikeyan Ramasubramanian Reviewed-on: https://review.coreboot.org/c/coreboot/+/42444 Reviewed-by: Furquan Shaikh Reviewed-by: Aaron Durbin Tested-by: build bot (Jenkins) --- src/soc/intel/tigerlake/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'src') diff --git a/src/soc/intel/tigerlake/Kconfig b/src/soc/intel/tigerlake/Kconfig index a61cbfc85efd..f502940b0b9a 100644 --- a/src/soc/intel/tigerlake/Kconfig +++ b/src/soc/intel/tigerlake/Kconfig @@ -17,6 +17,7 @@ config CPU_SPECIFIC_OPTIONS select CACHE_MRC_SETTINGS select CPU_INTEL_COMMON select CPU_INTEL_FIRMWARE_INTERFACE_TABLE + select FSP_COMPRESS_FSP_S_LZ4 select FSP_M_XIP select GENERIC_GPIO_LIB select HAVE_FSP_GOP -- cgit v1.2.3