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mb/siemens/mc_ehl: Disable C-States for CPU and package

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Disable all C-states other than C0/C1 for CPU and package.

Change-Id: I2c163f859dab4b0dc02896c70122e993cdd3db72
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58893
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <lean.sheng.tan@intel.com>
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
This commit is contained in:
Werner Zeh 2021-11-03 07:26:44 +01:00 committed by Patrick Georgi
parent 2c439adb51
commit 2d04693640
1 changed files with 10 additions and 0 deletions
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10
src/mainboard/siemens/mc_ehl/mainboard.c
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@ -10,6 +10,7 @@
#include <hwilib.h> #include <hwilib.h>
#include <i210.h> #include <i210.h>
#include <soc/gpio.h> #include <soc/gpio.h>
#include <soc/ramstage.h>
#include <string.h> #include <string.h>
#include <timer.h> #include <timer.h>
#include <timestamp.h> #include <timestamp.h>
@ -114,6 +115,15 @@ static void wait_for_legacy_dev(void *unused)
printk(BIOS_NOTICE, "done!\n"); printk(BIOS_NOTICE, "done!\n");
} }
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;
}
static void mainboard_init(void *chip_info) static void mainboard_init(void *chip_info)
{ {
const struct pad_config *pads; const struct pad_config *pads;