From 93d5f40be51fc118a3b303f1fa515950f883f958 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Thu, 8 Jun 2017 11:00:23 -0500 Subject: soc/intel/skylake: Cache the MMIO BIOS region If the boot media is memory mapped temporarily mark it as write protect MTRR type so that memory-mapped accesses are faster. Depthcharge payload loading was sped up by 75ms using this. Change-Id: Ice217561bb01a43ba520ce51e03d81979f317343 Signed-off-by: Barnali Sarkar Signed-off-by: Aaron Durbin Reviewed-on: https://review.coreboot.org/20089 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/soc/intel/skylake/cpu.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'src/soc') diff --git a/src/soc/intel/skylake/cpu.c b/src/soc/intel/skylake/cpu.c index dddc1c3c7e..d1ed146c1b 100644 --- a/src/soc/intel/skylake/cpu.c +++ b/src/soc/intel/skylake/cpu.c @@ -34,6 +34,7 @@ #include #include #include +#include #include #include #include @@ -569,6 +570,12 @@ static void soc_post_cpus_init(void *unused) { if (mp_run_on_all_cpus(&x86_setup_mtrrs_with_detect, 1000) < 0) printk(BIOS_ERR, "MTRR programming failure\n"); + + /* Temporarily cache the memory-mapped boot media. */ + if (IS_ENABLED(CONFIG_BOOT_DEVICE_MEMORY_MAPPED) && + IS_ENABLED(CONFIG_BOOT_DEVICE_SPI_FLASH)) + fast_spi_cache_bios_region(); + x86_mtrr_check(); } -- cgit v1.2.3