1 files changed, 226 insertions, 0 deletions
diff --git a/src/soc/intel/pantherlake/cpu.c b/src/soc/intel/pantherlake/cpu.c
new file mode 100644
index 0000000000..13a1d9ea24
--- /dev/null
+++ b/src/soc/intel/pantherlake/cpu.c
@@ -0,0 +1,226 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <assert.h>
+#include <console/console.h>
+#include <cpu/cpu.h>
+#include <cpu/intel/common/common.h>
+#include <cpu/intel/microcode.h>
+#include <cpu/intel/smm_reloc.h>
+#include <cpu/intel/turbo.h>
+#include <cpu/x86/lapic.h>
+#include <cpu/x86/mp.h>
+#include <cpu/x86/msr.h>
+#include <device/pci.h>
+#include <fsp/api.h>
+#include <intelblocks/acpi.h>
+#include <intelblocks/cpulib.h>
+#include <intelblocks/mp_init.h>
+#include <intelblocks/msr.h>
+#include <soc/cpu.h>
+#include <soc/msr.h>
+#include <soc/pci_devs.h>
+#include <soc/soc_chip.h>
+#include <soc/soc_info.h>
+
+bool cpu_soc_is_in_untrusted_mode(void)
+{
+	msr_t msr;
+
+	msr = rdmsr(MSR_BIOS_DONE);
+	return !!(msr.lo & ENABLE_IA_UNTRUSTED);
+}
+
+void cpu_soc_bios_done(void)
+{
+	msr_t msr;
+
+	msr = rdmsr(MSR_BIOS_DONE);
+	msr.lo |= ENABLE_IA_UNTRUSTED;
+	wrmsr(MSR_BIOS_DONE, msr);
+}
+
+uint8_t get_supported_lpm_mask(void)
+{
+	return LPM_S0i2_0 | LPM_S0i2_1 | LPM_S0i2_2;
+}
+
+static void soc_fsp_load(void)
+{
+	fsps_load();
+}
+
+static void configure_misc(void)
+{
+	msr_t msr;
+
+	config_t *conf = (config_t *)config_of_soc();
+
+	msr = rdmsr(IA32_MISC_ENABLE);
+	msr.lo |= FAST_STRINGS_ENABLE_BIT;
+	msr.lo |= TM1_TM2_EMTTM_ENABLE_BIT;
+	wrmsr(IA32_MISC_ENABLE, msr);
+
+	/* Set EIST status */
+	cpu_set_eist(conf->eist_enable);
+
+	/* Disable Thermal interrupts */
+	msr.lo = 0;
+	msr.hi = 0;
+	wrmsr(IA32_THERM_INTERRUPT, msr);
+
+	/* Enable package critical interrupt only */
+	msr.lo = CRITICAL_TEMP_INTERRUPT_ENABLE;
+	msr.hi = 0;
+	wrmsr(IA32_PACKAGE_THERM_INTERRUPT, msr);
+
+	/* Enable PROCHOT and Power Performance Platform Override */
+	msr = rdmsr(MSR_POWER_CTL);
+	msr.lo |= ENABLE_BIDIR_PROCHOT;
+	msr.lo |= VR_THERM_ALERT_DISABLE_LOCK;
+	msr.lo |= PWR_PERF_PLATFORM_OVR;
+	wrmsr(MSR_POWER_CTL, msr);
+}
+
+enum core_type get_soc_cpu_type(void)
+{
+	if (cpu_is_hybrid_supported())
+		return cpu_get_cpu_type();
+
+	return CPUID_CORE_TYPE_INTEL_CORE;
+}
+
+bool soc_is_nominal_freq_supported(void)
+{
+	return true;
+}
+
+static void enable_x2apic(void)
+{
+	if (!CONFIG(X2APIC_LATE_WORKAROUND))
+		return;
+
+	enable_lapic_mode(true);
+}
+
+/* All CPUs including BSP will run the following function. */
+void soc_core_init(struct device *cpu)
+{
+	/* Clear out pending MCEs */
+	mca_configure();
+
+	enable_x2apic();
+
+	enable_lapic_tpr();
+
+	/* Configure Enhanced SpeedStep and Thermal Sensors */
+	configure_misc();
+
+	enable_pm_timer_emulation();
+
+	/* Enable Direct Cache Access */
+	configure_dca_cap();
+
+	/* Set energy policy */
+	set_energy_perf_bias(ENERGY_POLICY_NORMAL);
+
+	const config_t *conf = config_of_soc();
+	/* Set energy-performance preference */
+	if (conf != NULL && conf->enable_energy_perf_pref) {
+		if (check_energy_perf_cap())
+			set_energy_perf_pref(conf->energy_perf_pref_value);
+	}
+
+	/* Enable Turbo */
+	enable_turbo();
+
+	/* Set core type in struct cpu_info */
+	set_dev_core_type();
+
+	if (CONFIG(INTEL_TME) && is_tme_supported())
+		set_tme_core_activate();
+
+	/* TODO: Add support for DROP_CPU_FEATURE_PROGRAM_IN_FSP */
+}
+
+static void per_cpu_smm_trigger(void)
+{
+	/* Relocate the SMM handler. */
+	smm_relocate();
+}
+
+static void pre_mp_init(void)
+{
+	soc_fsp_load();
+
+	const config_t *conf = config_of_soc();
+	if (conf == NULL) {
+		printk(BIOS_ERR, "Configuration could not be retrieved.\n");
+		return;
+	}
+	if (conf->enable_energy_perf_pref) {
+		if (check_energy_perf_cap())
+			enable_energy_perf_pref();
+		else
+			printk(BIOS_WARNING, "Energy Performance Preference not supported!\n");
+	}
+}
+
+static void post_mp_init(void)
+{
+	/* Set Max Ratio */
+	cpu_set_max_ratio();
+
+	/*
+	 * 1. Now that all APs have been relocated as well as the BSP let SMIs
+	 * start flowing.
+	 * 2. Skip enabling power button SMI and enable it after BS_CHIPS_INIT
+	 * to avoid shutdown hang due to lack of init on certain IP in FSP-S.
+	 */
+	global_smi_enable_no_pwrbtn();
+}
+
+static const struct mp_ops mp_ops = {
+	/*
+	 * Skip Pre MP init MTRR programming as MTRRs are mirrored from BSP,
+	 * that are set prior to ramstage.
+	 * Real MTRRs programming are being done after resource allocation.
+	 */
+	.pre_mp_init = pre_mp_init,
+	.get_cpu_count = get_cpu_count,
+	.get_smm_info = smm_info,
+	.get_microcode_info = get_microcode_info,
+	.pre_mp_smm_init = smm_initialize,
+	.per_cpu_smm_trigger = per_cpu_smm_trigger,
+	.relocation_handler = smm_relocation_handler,
+	.post_mp_init = post_mp_init,
+};
+
+void mp_init_cpus(struct bus *cpu_bus)
+{
+	if (mp_init_with_smm(cpu_bus, &mp_ops))
+		printk(BIOS_ERR, "MP initialization failure.\n");
+
+	/* Thermal throttle activation offset */
+	configure_tcc_thermal_target();
+}
+
+int soc_skip_ucode_update(u32 current_patch_id, u32 new_patch_id)
+{
+	if (!CONFIG(CHROMEOS))
+		return 0;
+	/*
+	 * Locked RO Descriptor Implications:
+	 *
+	 * - A locked descriptor signals the RO binary is fixed; the FIT will load the
+	 *   RO's microcode during system reset.
+	 * - Attempts to load newer microcode from the RW CBFS will cause a boot-time
+	 *   delay (~60ms, core-dependent), as the microcode must be reloaded on BSP+APs.
+	 * - The kernel can load microcode updates without impacting AP FW boot time.
+	 * - Skipping RW CBFS microcode loading is low-risk when the RO is locked,
+	 *   prioritizing fast boot times.
+	 */
+	if (CONFIG(LOCK_MANAGEMENT_ENGINE) && current_patch_id)
+		return 1;
+
+	return 0;
+}