ramstage.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <acpi/acpi_device.h>
#include <baseboard/variants.h>
#include <console/console.h>
#include <device/pci_ops.h>
#include <soc/pci_devs.h>
 
#include <drivers/intel/dptf/chip.h>
#include <intelblocks/power_limit.h>
 
WEAK_DEV_PTR(dptf_policy);
 
void variant_update_power_limits(const struct cpu_power_limits *limits, size_t num_entries)
{
        if (!num_entries)
                return;
 
        const struct device *policy_dev = DEV_PTR(dptf_policy);
        if (!policy_dev)
                return;
 
        struct drivers_intel_dptf_config *config = policy_dev->chip_info;
 
        uint16_t mchid = pci_s_read_config16(PCI_DEV(0, 0, 0), PCI_DEVICE_ID);
 
        u8 tdp = get_cpu_tdp();
 
        for (size_t i = 0; i < num_entries; i++) {
                if (mchid == limits[i].mchid && tdp == limits[i].cpu_tdp) {
                        struct dptf_power_limits *settings = &config->controls.power_limits;
                        config_t *conf = config_of_soc();
                        struct soc_power_limits_config *soc_config = conf->power_limits_config;
                        settings->pl1.min_power = limits[i].pl1_min_power;
                        settings->pl1.max_power = limits[i].pl1_max_power;
                        settings->pl2.min_power = limits[i].pl2_min_power;
                        settings->pl2.max_power = limits[i].pl2_max_power;
                        soc_config->tdp_pl4 = DIV_ROUND_UP(limits[i].pl4_power,
                                                           MILLIWATTS_TO_WATTS);
                        printk(BIOS_INFO, "Overriding power limits PL1 (%u, %u) PL2 (%u, %u) PL4 (%u)\n",
                                        limits[i].pl1_min_power,
                                        limits[i].pl1_max_power,
                                        limits[i].pl2_min_power,
                                        limits[i].pl2_max_power,
                                        limits[i].pl4_power);
                }
        }
}