| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| /* |
| * This file is created based on Intel Tiger Lake Processor CPU Datasheet |
| * Document number: 575683 |
| * Chapter number: 15 |
| */ |
| |
| #include <arch/cpu.h> |
| #include <console/console.h> |
| #include <device/pci.h> |
| #include <cpu/x86/lapic.h> |
| #include <cpu/x86/mp.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/intel/smm_reloc.h> |
| #include <cpu/intel/turbo.h> |
| #include <fsp/api.h> |
| #include <intelblocks/cpulib.h> |
| #include <intelblocks/mp_init.h> |
| #include <intelblocks/msr.h> |
| #include <romstage_handoff.h> |
| #include <soc/cpu.h> |
| #include <soc/msr.h> |
| #include <soc/pci_devs.h> |
| #include <soc/pm.h> |
| #include <soc/soc_chip.h> |
| |
| static void soc_fsp_load(void) |
| { |
| fsps_load(romstage_handoff_is_resume()); |
| } |
| |
| static void configure_isst(void) |
| { |
| config_t *conf = config_of_soc(); |
| msr_t msr; |
| |
| if (conf->speed_shift_enable) { |
| /* |
| * Kernel driver checks CPUID.06h:EAX[Bit 7] to determine if HWP |
| * is supported or not. coreboot needs to configure MSR 0x1AA |
| * which is then reflected in the CPUID register. |
| */ |
| msr = rdmsr(MSR_MISC_PWR_MGMT); |
| msr.lo |= MISC_PWR_MGMT_ISST_EN; /* Enable Speed Shift */ |
| msr.lo |= MISC_PWR_MGMT_ISST_EN_INT; /* Enable Interrupt */ |
| msr.lo |= MISC_PWR_MGMT_ISST_EN_EPP; /* Enable EPP */ |
| wrmsr(MSR_MISC_PWR_MGMT, msr); |
| } else { |
| msr = rdmsr(MSR_MISC_PWR_MGMT); |
| msr.lo &= ~MISC_PWR_MGMT_ISST_EN; /* Disable Speed Shift */ |
| msr.lo &= ~MISC_PWR_MGMT_ISST_EN_INT; /* Disable Interrupt */ |
| msr.lo &= ~MISC_PWR_MGMT_ISST_EN_EPP; /* Disable EPP */ |
| wrmsr(MSR_MISC_PWR_MGMT, msr); |
| } |
| } |
| |
| static void configure_misc(void) |
| { |
| msr_t msr; |
| |
| config_t *conf = config_of_soc(); |
| |
| msr = rdmsr(IA32_MISC_ENABLE); |
| msr.lo |= (1 << 0); /* Fast String enable */ |
| msr.lo |= (1 << 3); /* TM1/TM2/EMTTM enable */ |
| 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 = 1 << 4; |
| msr.hi = 0; |
| wrmsr(IA32_PACKAGE_THERM_INTERRUPT, msr); |
| |
| /* Enable PROCHOT */ |
| msr = rdmsr(MSR_POWER_CTL); |
| msr.lo |= (1 << 0); /* Enable Bi-directional PROCHOT as an input*/ |
| msr.lo |= (1 << 23); /* Lock it */ |
| wrmsr(MSR_POWER_CTL, msr); |
| } |
| |
| static void enable_lapic_tpr(void) |
| { |
| msr_t msr; |
| |
| msr = rdmsr(MSR_PIC_MSG_CONTROL); |
| msr.lo &= ~(1 << 10); /* Enable APIC TPR updates */ |
| wrmsr(MSR_PIC_MSG_CONTROL, msr); |
| } |
| |
| static void configure_dca_cap(void) |
| { |
| uint32_t feature_flag; |
| msr_t msr; |
| |
| /* Check feature flag in CPUID.(EAX=1):ECX[18]==1 */ |
| feature_flag = cpu_get_feature_flags_ecx(); |
| if (feature_flag & CPUID_DCA) { |
| msr = rdmsr(IA32_PLATFORM_DCA_CAP); |
| msr.lo |= 1; |
| wrmsr(IA32_PLATFORM_DCA_CAP, msr); |
| } |
| } |
| |
| static void enable_pm_timer_emulation(void) |
| { |
| /* ACPI PM timer emulation */ |
| msr_t msr; |
| /* |
| * The derived frequency is calculated as follows: |
| * (CTC_FREQ * msr[63:32]) >> 32 = target frequency. |
| * Back solve the multiplier so the 3.579545MHz ACPI timer |
| * frequency is used. |
| */ |
| msr.hi = (3579545ULL << 32) / CTC_FREQ; |
| /* Set PM1 timer IO port and enable */ |
| msr.lo = (EMULATE_DELAY_VALUE << EMULATE_DELAY_OFFSET_VALUE) | |
| EMULATE_PM_TMR_EN | (ACPI_BASE_ADDRESS + PM1_TMR); |
| wrmsr(MSR_EMULATE_PM_TIMER, msr); |
| } |
| |
| static void set_energy_perf_bias(u8 policy) |
| { |
| msr_t msr; |
| int ecx; |
| |
| /* Determine if energy efficient policy is supported. */ |
| ecx = cpuid_ecx(0x6); |
| if (!(ecx & (1 << 3))) |
| return; |
| |
| /* Energy Policy is bits 3:0 */ |
| msr = rdmsr(IA32_ENERGY_PERF_BIAS); |
| msr.lo &= ~0xf; |
| msr.lo |= policy & 0xf; |
| wrmsr(IA32_ENERGY_PERF_BIAS, msr); |
| } |
| |
| static void configure_c_states(void) |
| { |
| msr_t msr; |
| |
| /* C-state Interrupt Response Latency Control 1 - package C6/C7 short */ |
| msr.hi = 0; |
| msr.lo = IRTL_VALID | IRTL_32768_NS | C_STATE_LATENCY_CONTROL_1_LIMIT; |
| wrmsr(MSR_C_STATE_LATENCY_CONTROL_1, msr); |
| |
| /* C-state Interrupt Response Latency Control 2 - package C6/C7 long */ |
| msr.hi = 0; |
| msr.lo = IRTL_VALID | IRTL_32768_NS | C_STATE_LATENCY_CONTROL_2_LIMIT; |
| wrmsr(MSR_C_STATE_LATENCY_CONTROL_2, msr); |
| |
| /* C-state Interrupt Response Latency Control 3 - package C8 */ |
| msr.hi = 0; |
| msr.lo = IRTL_VALID | IRTL_32768_NS | |
| C_STATE_LATENCY_CONTROL_3_LIMIT; |
| wrmsr(MSR_C_STATE_LATENCY_CONTROL_3, msr); |
| |
| /* C-state Interrupt Response Latency Control 4 - package C9 */ |
| msr.hi = 0; |
| msr.lo = IRTL_VALID | IRTL_32768_NS | |
| C_STATE_LATENCY_CONTROL_4_LIMIT; |
| wrmsr(MSR_C_STATE_LATENCY_CONTROL_4, msr); |
| |
| /* C-state Interrupt Response Latency Control 5 - package C10 */ |
| msr.hi = 0; |
| msr.lo = IRTL_VALID | IRTL_32768_NS | |
| C_STATE_LATENCY_CONTROL_5_LIMIT; |
| wrmsr(MSR_C_STATE_LATENCY_CONTROL_5, msr); |
| } |
| |
| /* All CPUs including BSP will run the following function. */ |
| void soc_core_init(struct device *cpu) |
| { |
| /* Clear out pending MCEs */ |
| /* TODO(adurbin): This should only be done on a cold boot. Also, some |
| * of these banks are core vs package scope. For now every CPU clears |
| * every bank. */ |
| mca_configure(); |
| |
| /* Enable the local CPU apics */ |
| enable_lapic_tpr(); |
| setup_lapic(); |
| |
| /* Configure c-state interrupt response time */ |
| configure_c_states(); |
| |
| /* Configure Enhanced SpeedStep and Thermal Sensors */ |
| configure_misc(); |
| |
| /* Configure Intel Speed Shift */ |
| configure_isst(); |
| |
| /* Enable PM timer emulation */ |
| enable_pm_timer_emulation(); |
| |
| /* Enable Direct Cache Access */ |
| configure_dca_cap(); |
| |
| /* Set energy policy */ |
| set_energy_perf_bias(ENERGY_POLICY_NORMAL); |
| |
| /* Enable Turbo */ |
| enable_turbo(); |
| } |
| |
| static void per_cpu_smm_trigger(void) |
| { |
| /* Relocate the SMM handler. */ |
| smm_relocate(); |
| } |
| |
| static void post_mp_init(void) |
| { |
| /* Set Max Ratio */ |
| cpu_set_max_ratio(); |
| |
| /* |
| * Now that all APs have been relocated as well as the BSP let SMIs |
| * start flowing. |
| */ |
| smm_southbridge_enable(PWRBTN_EN | GBL_EN); |
| |
| /* Lock down the SMRAM space. */ |
| smm_lock(); |
| } |
| |
| 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 = soc_fsp_load, |
| .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 soc_init_cpus(struct bus *cpu_bus) |
| { |
| if (mp_init_with_smm(cpu_bus, &mp_ops)) |
| printk(BIOS_ERR, "MP initialization failure.\n"); |
| } |