diff options
Diffstat (limited to 'src/soc/intel/apollolake/fspcar.c')
| -rw-r--r-- | src/soc/intel/apollolake/fspcar.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/fspcar.c b/src/soc/intel/apollolake/fspcar.c index 8b1089f397..a284116bac 100644 --- a/src/soc/intel/apollolake/fspcar.c +++ b/src/soc/intel/apollolake/fspcar.c @@ -25,6 +25,17 @@ const FSPT_UPD temp_ram_init_params = { .FsptCommonUpd = { .Revision = 0, .Reserved = {0}, + /* + * It is a requirement for firmware to have Firmware Interface Table + * (FIT), which contains pointers to each microcode update. + * The microcode update is loaded for all logical processors before + * cpu reset vector. + * + * All SoC since Gen-4 has above mechanism in place to load microcode + * even before hitting CPU reset vector. Hence skipping FSP-T loading + * microcode after CPU reset by passing '0' value to + * FSPT_UPD.MicrocodeRegionBase and FSPT_UPD.MicrocodeRegionLength. + */ .MicrocodeRegionBase = 0, .MicrocodeRegionLength = 0, .CodeRegionBase = |