soc/intel/apollolake: Configure FSP UPDs to allow coreboot to lockdown

Configure FSP S UPDs to allow coreboot to handle the lockdown.

The main change here is setting `Write Protection Support` to 0,
as the default is Enabled, which shouldn't allow writes (even though
it seems to).

The UPDs are identical on APL and GLK, but all ones configured
in this patch have been there since their initial releases.

Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: I1f6e5344cab2af7aa6001b9ec0f07b043a9caa8a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67754
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/src/soc/intel/apollolake/chip.c b/src/soc/intel/apollolake/chip.c
index da2d00adb75d..607c1746ff6e 100644
--- a/src/soc/intel/apollolake/chip.c
+++ b/src/soc/intel/apollolake/chip.c
@@ -697,11 +697,13 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *silupd)
 
 	silconfig->SkipMpInit = !CONFIG(USE_INTEL_FSP_MP_INIT);
 
-	/* Disable setting of EISS bit in FSP. */
-	silconfig->SpiEiss = 0;
-
-	/* Disable FSP from locking access to the RTC NVRAM */
-	silconfig->RtcLock = 0;
+	/* coreboot handles the lockdown */
+	silconfig->LockDownGlobalSmi		= 0;
+	silconfig->BiosLock			= 0;
+	silconfig->BiosInterface		= 0;
+	silconfig->WriteProtectionEnable[0]	= 0;
+	silconfig->SpiEiss			= 0;
+	silconfig->RtcLock			= 0;
 
 	/* Enable Audio clk gate and power gate */
 	silconfig->HDAudioClkGate = cfg->hdaudio_clk_gate_enable;