soc/intel/jasperlake: Send End-of-Post message to CSE

This is done to ensure the CSE will not execute any pre-boot commands
after it receives this command. Verified EOP and error recovery sequence
from Intel doc#619830.

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I36fe448ff279ba054ad5e79e71c995dc915db21e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55633
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/jasperlake/Kconfig

@@ -60,6 +60,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_FSP_RESET
 	select SOC_INTEL_COMMON_PCH_BASE
 	select SOC_INTEL_COMMON_RESET
+	select SOC_INTEL_CSE_SET_EOP
 	select SSE2
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	select TSC_MONOTONIC_TIMER

src/soc/intel/jasperlake/fsp_params.c

@@ -23,9 +23,9 @@
  * 2 - Send in DXE (Not applicable for FSP in API mode)
  */
 enum {
-	EOP_DISABLE,
-	EOP_PEI,
-	EOP_DXE,
+	EOP_DISABLE = 0,
+	EOP_PEI = 1,
+	EOP_DXE = 2,
 } EndOfPost;
 
 static void parse_devicetree(FSP_S_CONFIG *params)
@@ -81,8 +81,8 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 		params->RtcMemoryLock = 1;
 	}
 
-	/* Enable End of Post in PEI phase */
-	params->EndOfPostMessage = EOP_PEI;
+	/* coreboot will send EOP before loading payload */
+	params->EndOfPostMessage = EOP_DISABLE;
 
 	/* Legacy 8254 timer support */
 	params->Enable8254ClockGating = !CONFIG(USE_LEGACY_8254_TIMER);