| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <console/console.h> |
| #include <cpu/cpu.h> |
| #include <cpu/x86/cr.h> |
| #include <cpu/x86/lapic.h> |
| #include <cpu/x86/mp.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/x86/mtrr.h> |
| #include <cpu/x86/smm.h> |
| #include <cpu/intel/smm_reloc.h> |
| #include <cpu/intel/em64t100_save_state.h> |
| #include <cpu/intel/turbo.h> |
| #include <cpu/intel/common/common.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <intelblocks/cpulib.h> |
| #include <lib.h> |
| #include <soc/msr.h> |
| #include <soc/cpu.h> |
| #include <soc/iomap.h> |
| #include <soc/smm.h> |
| #include <soc/soc_util.h> |
| #include <types.h> |
| |
| bool cpu_soc_is_in_untrusted_mode(void) |
| { |
| msr_t msr; |
| |
| msr = rdmsr(MSR_POWER_MISC); |
| return !!(msr.lo & ENABLE_IA_UNTRUSTED); |
| } |
| |
| void cpu_soc_bios_done(void) |
| { |
| msr_t msr; |
| |
| msr = rdmsr(MSR_POWER_MISC); |
| msr.lo |= ENABLE_IA_UNTRUSTED; |
| wrmsr(MSR_POWER_MISC, msr); |
| } |
| |
| static struct smm_relocation_attrs relo_attrs; |
| |
| static void dnv_configure_mca(void) |
| { |
| msr_t msr; |
| struct cpuid_result cpuid_regs; |
| |
| /* Check feature flag in CPUID.(EAX=1):EDX[7]==1 MCE |
| * and CPUID.(EAX=1):EDX[14]==1 MCA*/ |
| cpuid_regs = cpuid(1); |
| if ((cpuid_regs.edx & (1<<7 | 1<<14)) != (1<<7 | 1<<14)) |
| return; |
| |
| msr = rdmsr(IA32_MCG_CAP); |
| if (msr.lo & IA32_MCG_CAP_CTL_P_MASK) { |
| /* Enable all error logging */ |
| msr.lo = msr.hi = 0xffffffff; |
| wrmsr(IA32_MCG_CTL, msr); |
| } |
| |
| /* 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(); |
| |
| /* TODO install a fallback MC handler for each core in case OS does |
| not provide one. Is it really needed? */ |
| |
| /* Enable the machine check exception */ |
| write_cr4(read_cr4() | CR4_MCE); |
| } |
| |
| static void configure_thermal_core(void) |
| { |
| msr_t msr; |
| |
| /* Disable Thermal interrupts */ |
| msr.lo = 0; |
| msr.hi = 0; |
| wrmsr(IA32_THERM_INTERRUPT, msr); |
| wrmsr(IA32_PACKAGE_THERM_INTERRUPT, msr); |
| |
| msr = rdmsr(IA32_MISC_ENABLE); |
| msr.lo |= THERMAL_MONITOR_ENABLE_BIT; /* TM1/TM2/EMTTM enable */ |
| wrmsr(IA32_MISC_ENABLE, msr); |
| } |
| |
| static void denverton_core_init(struct device *cpu) |
| { |
| msr_t msr; |
| |
| printk(BIOS_DEBUG, "Init Denverton-NS SoC cores.\n"); |
| |
| /* Clear out pending MCEs */ |
| dnv_configure_mca(); |
| |
| /* Configure Thermal Sensors */ |
| configure_thermal_core(); |
| |
| /* Enable Fast Strings */ |
| msr = rdmsr(IA32_MISC_ENABLE); |
| msr.lo |= FAST_STRINGS_ENABLE_BIT; |
| wrmsr(IA32_MISC_ENABLE, msr); |
| |
| set_aesni_lock(); |
| |
| /* Enable Turbo */ |
| enable_turbo(); |
| |
| /* Enable speed step. Always ON.*/ |
| msr = rdmsr(IA32_MISC_ENABLE); |
| msr.lo |= SPEED_STEP_ENABLE_BIT; |
| wrmsr(IA32_MISC_ENABLE, msr); |
| |
| enable_pm_timer_emulation(); |
| } |
| |
| static struct device_operations cpu_dev_ops = { |
| .init = denverton_core_init, |
| }; |
| |
| static const struct cpu_device_id cpu_table[] = { |
| /* Denverton-NS A0/A1 CPUID */ |
| {X86_VENDOR_INTEL, CPUID_DENVERTON_A0_A1, CPUID_EXACT_MATCH_MASK }, |
| /* Denverton-NS B0 CPUID */ |
| {X86_VENDOR_INTEL, CPUID_DENVERTON_B0, CPUID_EXACT_MATCH_MASK }, |
| CPU_TABLE_END |
| }; |
| |
| static const struct cpu_driver driver __cpu_driver = { |
| .ops = &cpu_dev_ops, |
| .id_table = cpu_table, |
| }; |
| |
| /* |
| * MP and SMM loading initialization. |
| */ |
| |
| static void relocation_handler(int cpu, uintptr_t curr_smbase, |
| uintptr_t staggered_smbase) |
| { |
| msr_t smrr; |
| em64t100_smm_state_save_area_t *smm_state; |
| (void)cpu; |
| |
| /* Set up SMRR. */ |
| smrr.lo = relo_attrs.smrr_base; |
| smrr.hi = 0; |
| wrmsr(IA32_SMRR_PHYS_BASE, smrr); |
| smrr.lo = relo_attrs.smrr_mask; |
| smrr.hi = 0; |
| wrmsr(IA32_SMRR_PHYS_MASK, smrr); |
| smm_state = (void *)(SMM_EM64T100_SAVE_STATE_OFFSET + curr_smbase); |
| smm_state->smbase = staggered_smbase; |
| } |
| |
| static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, |
| size_t *smm_save_state_size) |
| { |
| uintptr_t smm_base; |
| size_t smm_size; |
| uintptr_t handler_base; |
| size_t handler_size; |
| |
| /* All range registers are aligned to 4KiB */ |
| const uint32_t rmask = ~((1 << 12) - 1); |
| |
| /* Initialize global tracking state. */ |
| smm_region(&smm_base, &smm_size); |
| smm_subregion(SMM_SUBREGION_HANDLER, &handler_base, &handler_size); |
| |
| relo_attrs.smbase = smm_base; |
| relo_attrs.smrr_base = relo_attrs.smbase | MTRR_TYPE_WRBACK; |
| relo_attrs.smrr_mask = ~(smm_size - 1) & rmask; |
| relo_attrs.smrr_mask |= MTRR_PHYS_MASK_VALID; |
| |
| *perm_smbase = handler_base; |
| *perm_smsize = handler_size; |
| *smm_save_state_size = sizeof(em64t100_smm_state_save_area_t); |
| } |
| |
| static unsigned int detect_num_cpus_via_cpuid(void) |
| { |
| unsigned int ecx = 0; |
| |
| while (1) { |
| const struct cpuid_result leaf_b = cpuid_ext(0xb, ecx); |
| |
| /* Processor doesn't have hyperthreading so just determine the |
| number of cores from level type (ecx[15:8] == 2). */ |
| if ((leaf_b.ecx >> 8 & 0xff) == 2) |
| return leaf_b.ebx & 0xffff; |
| |
| ecx++; |
| } |
| } |
| |
| /* Assumes that FSP has already programmed the cores disabled register */ |
| static unsigned int detect_num_cpus_via_mch(void) |
| { |
| /* Get Masks for Total Existing SOC Cores and Core Disable Mask */ |
| const u32 core_exists_mask = MMIO32(DEFAULT_MCHBAR + MCH_BAR_CORE_EXISTS_MASK); |
| const u32 core_disable_mask = MMIO32(DEFAULT_MCHBAR + MCH_BAR_CORE_DISABLE_MASK); |
| const u32 active_cores_mask = ~core_disable_mask & core_exists_mask; |
| |
| /* Calculate Number of Active Cores */ |
| const unsigned int active_cores = popcnt(active_cores_mask); |
| const unsigned int total_cores = popcnt(core_exists_mask); |
| |
| printk(BIOS_DEBUG, "Number of Active Cores: %u of %u total.\n", |
| active_cores, total_cores); |
| |
| return active_cores; |
| } |
| |
| /* Find CPU topology */ |
| int get_cpu_count(void) |
| { |
| unsigned int num_cpus = detect_num_cpus_via_mch(); |
| |
| if (num_cpus == 0 || num_cpus > CONFIG_MAX_CPUS) { |
| num_cpus = detect_num_cpus_via_cpuid(); |
| printk(BIOS_DEBUG, "Number of Cores (CPUID): %u.\n", num_cpus); |
| } |
| return num_cpus; |
| } |
| |
| static void set_max_turbo_freq(void) |
| { |
| msr_t msr, perf_ctl; |
| |
| perf_ctl.hi = 0; |
| |
| /* Check for configurable TDP option */ |
| if (get_turbo_state() == TURBO_ENABLED) { |
| msr = rdmsr(MSR_TURBO_RATIO_LIMIT); |
| perf_ctl.lo = (msr.lo & 0xff) << 8; |
| |
| } else if (cpu_config_tdp_levels()) { |
| /* Set to nominal TDP ratio */ |
| msr = rdmsr(MSR_CONFIG_TDP_NOMINAL); |
| perf_ctl.lo = (msr.lo & 0xff) << 8; |
| |
| } else { |
| /* Platform Info bits 15:8 give max ratio */ |
| msr = rdmsr(MSR_PLATFORM_INFO); |
| perf_ctl.lo = msr.lo & 0xff00; |
| } |
| wrmsr(IA32_PERF_CTL, perf_ctl); |
| |
| printk(BIOS_DEBUG, "cpu: frequency set to %d\n", |
| ((perf_ctl.lo >> 8) & 0xff) * CPU_BCLK); |
| } |
| |
| /* |
| * Do essential initialization tasks before APs can be fired up |
| * |
| * 1. Prevent race condition in MTRR solution. Enable MTRRs on the BSP. This |
| * creates the MTRR solution that the APs will use. Otherwise APs will try to |
| * apply the incomplete solution as the BSP is calculating it. |
| */ |
| static void pre_mp_init(void) |
| { |
| x86_setup_mtrrs_with_detect(); |
| x86_mtrr_check(); |
| } |
| |
| static void post_mp_init(void) |
| { |
| /* Set Max Ratio */ |
| set_max_turbo_freq(); |
| |
| /* |
| * Now that all APs have been relocated as well as the BSP let SMIs |
| * start flowing. |
| */ |
| global_smi_enable(); |
| } |
| |
| /* |
| * CPU initialization recipe |
| * |
| * Note that no microcode update is passed to the init function. CSE updates |
| * the microcode on all cores before releasing them from reset. That means that |
| * the BSP and all APs will come up with the same microcode revision. |
| */ |
| static const struct mp_ops mp_ops = { |
| .pre_mp_init = pre_mp_init, |
| .get_cpu_count = get_cpu_count, |
| .get_smm_info = get_smm_info, |
| .pre_mp_smm_init = smm_southbridge_clear_state, |
| .relocation_handler = relocation_handler, |
| .post_mp_init = post_mp_init, |
| }; |
| |
| void mp_init_cpus(struct bus *cpu_bus) |
| { |
| /* Clear for take-off */ |
| /* TODO: Handle mp_init_with_smm failure? */ |
| mp_init_with_smm(cpu_bus, &mp_ops); |
| } |