ramstage.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <soc/ramstage.h>
#include <carrier/gpio.h>
 
static void init_mainboard(void *chip_info)
{
        carrier_gpio_configure();
}
 
void mainboard_silicon_init_params(FSP_S_CONFIG *silconfig)
{
        /*
         * CPU Power Management Configuration correspond to the BIOS Setup menu settings
         * in the AMI UEFI v112.
         * TODO: move these FSP options to device tree
         */
        silconfig->EnableCx = 1;            /* Enable CPU power states */
        silconfig->C1e = 1;                 /* enable Enhanced C-states */
        /*
         * Attention! Do not change PkgCStateLimit! This causes spikes in the power
         * consumption of the SoC when the system comes out of power saving mode, and
         * voltage sagging at the output of DC-DC converters on the COMe module. In the
         * AMI BIOS Setup shows this parameter, but does not allow changing it.
         */
        silconfig->PkgCStateLimit = 0;      /* Max Pkg Cstate : PkgC0C1 */
        silconfig->MaxCoreCState = 3;       /* Max Core C-State : C6 */
        silconfig->CStateAutoDemotion = 0;  /* Disable C1 and C3 Auto-demotion */
        silconfig->CStateUnDemotion = 0;    /* Disable C1 and C3 Un-demotion */
        silconfig->PkgCStateDemotion = 1;   /* enable package Cstate demotion */
        silconfig->PkgCStateUnDemotion = 1; /* enable package Cstate undemotion */
        silconfig->PmSupport = 1;           /* GT PM Support */
        silconfig->EnableRenderStandby = 1; /* enable render standby */
        silconfig->LPSS_S0ixEnable = 1;     /* LPSS IOSF PMCTL S0ix Enable */
        silconfig->InitS3Cpu = 1;           /* initialize CPU during S3 resume */
 
        /* Override High Precision Timer options */
        silconfig->HpetBdfValid = 1;
        silconfig->HpetBusNumber = 0xFA;
        silconfig->HpetDeviceNumber = 0x0F;
        silconfig->HpetFunctionNumber = 0;
 
        /* Override APIC options */
        silconfig->IoApicId = 1;
        silconfig->IoApicBdfValid = 1;
        silconfig->IoApicBusNumber = 0xFA;
        silconfig->IoApicDeviceNumber = 0x1F;
        silconfig->IoApicFunctionNumber = 0;
}
 
struct chip_operations mainboard_ops = {
        .init = init_mainboard,
};