[coreboot-gerrit] [S] Change in coreboot[master]: mb/prodrive/atlas: Disable C-States & cTDP

[Lean Sheng Tan (Code Review)]

Lean Sheng Tan has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/68222 )

Change subject: mb/prodrive/atlas: Disable C-States & cTDP
......................................................................

mb/prodrive/atlas: Disable C-States & cTDP

As Atlas is required for industrial use cases:
- Disable Configurable TDP
- Disable all C-states other than C0/C1 for CPU and package

Signed-off-by: Lean Sheng Tan 
Change-Id: Iaf1c15ac258c78025420966bf592795b66101d17
---
M src/mainboard/prodrive/atlas/mainboard.c
1 file changed, 27 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/22/68222/1

diff --git a/src/mainboard/prodrive/atlas/mainboard.c b/src/mainboard/prodrive/atlas/mainboard.c
index 036208a..65b266f 100644
--- a/src/mainboard/prodrive/atlas/mainboard.c
+++ b/src/mainboard/prodrive/atlas/mainboard.c
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */

#include <device/device.h>
+#include <soc/ramstage.h>
 #include <stdint.h>

#include "gpio.h"
@@ -10,6 +11,18 @@
    configure_gpio_pads();
 }

+void mainboard_silicon_init_params(FSP_S_CONFIG *params)
+{
+	/* Disable CPU power states (C-states) */
+	params->Cx = 0;
+
+	/* Set maximum package C-state to PkgC0C1 */
+	params->PkgCStateLimit = 0;
+
+	/* Disable Configurable TDP */
+	params->ApplyConfigTdp = 0;
+}
+
 struct chip_operations mainboard_ops = {
    .init = mainboard_init,
 };