| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <assert.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <acpi/acpi.h> |
| #include <cpu/cpu.h> |
| #include <cpu/x86/mtrr.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/x86/lapic.h> |
| #include <cpu/x86/mp.h> |
| #include <cpu/intel/microcode.h> |
| #include <cpu/intel/speedstep.h> |
| #include <cpu/intel/turbo.h> |
| #include <cpu/x86/cache.h> |
| #include <cpu/x86/name.h> |
| #include "model_2065x.h" |
| #include "chip.h" |
| #include <cpu/intel/smm_reloc.h> |
| #include <cpu/intel/common/common.h> |
| #include <smp/node.h> |
| |
| /* |
| * List of supported C-states in this processor |
| * |
| * Latencies are typical worst-case package exit time in uS |
| * taken from the SandyBridge BIOS specification. |
| */ |
| static acpi_cstate_t cstate_map[] = { |
| { /* 0: C0 */ |
| }, { /* 1: C1 */ |
| .latency = 1, |
| .power = 1000, |
| .resource = { |
| .addrl = 0x00, /* MWAIT State 0 */ |
| .space_id = ACPI_ADDRESS_SPACE_FIXED, |
| .bit_width = ACPI_FFIXEDHW_VENDOR_INTEL, |
| .bit_offset = ACPI_FFIXEDHW_CLASS_MWAIT, |
| .access_size = ACPI_FFIXEDHW_FLAG_HW_COORD, |
| } |
| }, |
| { /* 2: C1E */ |
| .latency = 1, |
| .power = 1000, |
| .resource = { |
| .addrl = 0x01, /* MWAIT State 0 Sub-state 1 */ |
| .space_id = ACPI_ADDRESS_SPACE_FIXED, |
| .bit_width = ACPI_FFIXEDHW_VENDOR_INTEL, |
| .bit_offset = ACPI_FFIXEDHW_CLASS_MWAIT, |
| .access_size = ACPI_FFIXEDHW_FLAG_HW_COORD, |
| } |
| }, |
| { /* 3: C3 */ |
| .latency = 63, |
| .power = 500, |
| .resource = { |
| .addrl = 0x10, /* MWAIT State 1 */ |
| .space_id = ACPI_ADDRESS_SPACE_FIXED, |
| .bit_width = ACPI_FFIXEDHW_VENDOR_INTEL, |
| .bit_offset = ACPI_FFIXEDHW_CLASS_MWAIT, |
| .access_size = ACPI_FFIXEDHW_FLAG_HW_COORD, |
| } |
| }, |
| { /* 4: C6 */ |
| .latency = 87, |
| .power = 350, |
| .resource = { |
| .addrl = 0x20, /* MWAIT State 2 */ |
| .space_id = ACPI_ADDRESS_SPACE_FIXED, |
| .bit_width = ACPI_FFIXEDHW_VENDOR_INTEL, |
| .bit_offset = ACPI_FFIXEDHW_CLASS_MWAIT, |
| .access_size = ACPI_FFIXEDHW_FLAG_HW_COORD, |
| } |
| }, |
| { /* 5: C7 */ |
| .latency = 90, |
| .power = 200, |
| .resource = { |
| .addrl = 0x30, /* MWAIT State 3 */ |
| .space_id = ACPI_ADDRESS_SPACE_FIXED, |
| .bit_width = ACPI_FFIXEDHW_VENDOR_INTEL, |
| .bit_offset = ACPI_FFIXEDHW_CLASS_MWAIT, |
| .access_size = ACPI_FFIXEDHW_FLAG_HW_COORD, |
| } |
| }, |
| { /* 6: C7S */ |
| .latency = 90, |
| .power = 200, |
| .resource = { |
| .addrl = 0x31, /* MWAIT State 3 Sub-state 1 */ |
| .space_id = ACPI_ADDRESS_SPACE_FIXED, |
| .bit_width = ACPI_FFIXEDHW_VENDOR_INTEL, |
| .bit_offset = ACPI_FFIXEDHW_CLASS_MWAIT, |
| .access_size = ACPI_FFIXEDHW_FLAG_HW_COORD, |
| } |
| }, |
| { 0 } |
| }; |
| |
| int cpu_config_tdp_levels(void) |
| { |
| msr_t platform_info; |
| |
| /* Minimum CPU revision */ |
| if (cpuid_eax(1) < IVB_CONFIG_TDP_MIN_CPUID) |
| return 0; |
| |
| /* Bits 34:33 indicate how many levels supported */ |
| platform_info = rdmsr(MSR_PLATFORM_INFO); |
| return (platform_info.hi >> 1) & 3; |
| } |
| |
| static void configure_thermal_target(void) |
| { |
| struct cpu_intel_model_2065x_config *conf; |
| struct device *lapic; |
| msr_t msr; |
| |
| /* Find pointer to CPU configuration */ |
| lapic = dev_find_lapic(SPEEDSTEP_APIC_MAGIC); |
| if (!lapic || !lapic->chip_info) |
| return; |
| conf = lapic->chip_info; |
| |
| /* Set TCC activation offset if supported */ |
| msr = rdmsr(MSR_PLATFORM_INFO); |
| if ((msr.lo & (1 << 30)) && conf->tcc_offset) { |
| msr = rdmsr(MSR_TEMPERATURE_TARGET); |
| msr.lo &= ~(0xf << 24); /* Bits 27:24 */ |
| msr.lo |= (conf->tcc_offset & 0xf) << 24; |
| wrmsr(MSR_TEMPERATURE_TARGET, msr); |
| } |
| } |
| |
| static void configure_misc(void) |
| { |
| msr_t msr; |
| |
| msr = rdmsr(IA32_MISC_ENABLE); |
| msr.lo |= (1 << 0); /* Fast String enable */ |
| msr.lo |= (1 << 3); /* TM1/TM2/EMTTM enable */ |
| msr.lo |= (1 << 16); /* Enhanced SpeedStep Enable */ |
| wrmsr(IA32_MISC_ENABLE, msr); |
| |
| /* Disable Thermal interrupts */ |
| msr.lo = 0; |
| msr.hi = 0; |
| wrmsr(IA32_THERM_INTERRUPT, 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 set_max_ratio(void) |
| { |
| msr_t msr, perf_ctl; |
| |
| perf_ctl.hi = 0; |
| |
| /* Check for configurable TDP option */ |
| 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, "model_x06ax: frequency set to %d\n", |
| ((perf_ctl.lo >> 8) & 0xff) * IRONLAKE_BCLK); |
| } |
| |
| static void configure_mca(void) |
| { |
| msr_t msr; |
| int i; |
| |
| msr.lo = msr.hi = 0; |
| /* This should only be done on a cold boot */ |
| for (i = 0; i < 7; i++) |
| wrmsr(IA32_MC0_STATUS + (i * 4), msr); |
| } |
| |
| static void model_2065x_init(struct device *cpu) |
| { |
| char processor_name[49]; |
| |
| /* Turn on caching if we haven't already */ |
| x86_enable_cache(); |
| |
| /* Clear out pending MCEs */ |
| configure_mca(); |
| |
| /* Print processor name */ |
| fill_processor_name(processor_name); |
| printk(BIOS_INFO, "CPU: %s.\n", processor_name); |
| printk(BIOS_INFO, "CPU:lapic=%d, boot_cpu=%d\n", lapicid(), |
| boot_cpu()); |
| |
| /* Setup Page Attribute Tables (PAT) */ |
| // TODO set up PAT |
| |
| /* Enable the local CPU APICs */ |
| enable_lapic_tpr(); |
| setup_lapic(); |
| |
| /* Set virtualization based on Kconfig option */ |
| set_vmx_and_lock(); |
| |
| if (!intel_ht_sibling()) { |
| /* Lock AES-NI only if supported */ |
| if (cpuid_ecx(1) & (1 << 25)) |
| msr_set(MSR_FEATURE_CONFIG, BIT(0)); |
| } |
| |
| /* Configure Enhanced SpeedStep and Thermal Sensors */ |
| configure_misc(); |
| |
| /* Thermal throttle activation offset */ |
| configure_thermal_target(); |
| |
| /* Set Max Ratio */ |
| set_max_ratio(); |
| |
| /* Enable Turbo */ |
| enable_turbo(); |
| } |
| |
| /* MP initialization support. */ |
| static const void *microcode_patch; |
| |
| static void pre_mp_init(void) |
| { |
| /* Setup MTRRs based on physical address size. */ |
| x86_setup_mtrrs_with_detect(); |
| x86_mtrr_check(); |
| } |
| |
| static int get_cpu_count(void) |
| { |
| msr_t msr; |
| int num_threads; |
| int num_cores; |
| |
| msr = rdmsr(MSR_CORE_THREAD_COUNT); |
| num_threads = (msr.lo >> 0) & 0xffff; |
| num_cores = (msr.lo >> 16) & 0xffff; |
| printk(BIOS_DEBUG, "CPU has %u cores, %u threads enabled.\n", |
| num_cores, num_threads); |
| |
| return num_threads; |
| } |
| |
| static void get_microcode_info(const void **microcode, int *parallel) |
| { |
| microcode_patch = intel_microcode_find(); |
| *microcode = microcode_patch; |
| *parallel = 1; |
| } |
| |
| static void per_cpu_smm_trigger(void) |
| { |
| /* Relocate the SMM handler. */ |
| smm_relocate(); |
| |
| /* After SMM relocation a 2nd microcode load is required. */ |
| intel_microcode_load_unlocked(microcode_patch); |
| } |
| |
| static void post_mp_init(void) |
| { |
| /* Now that all APs have been relocated as well as the BSP let SMIs |
| * start flowing. */ |
| global_smi_enable(); |
| |
| /* Lock down the SMRAM space. */ |
| smm_lock(); |
| } |
| |
| static const struct mp_ops mp_ops = { |
| .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"); |
| } |
| |
| static struct device_operations cpu_dev_ops = { |
| .init = model_2065x_init, |
| }; |
| |
| /* Arrandale / Clarkdale CPU IDs */ |
| static const struct cpu_device_id cpu_table[] = { |
| { X86_VENDOR_INTEL, 0x20650 }, |
| { X86_VENDOR_INTEL, 0x20651 }, |
| { X86_VENDOR_INTEL, 0x20652 }, |
| { X86_VENDOR_INTEL, 0x20654 }, |
| { X86_VENDOR_INTEL, 0x20655 }, |
| { 0, 0 }, |
| }; |
| |
| static const struct cpu_driver driver __cpu_driver = { |
| .ops = &cpu_dev_ops, |
| .id_table = cpu_table, |
| .cstates = cstate_map, |
| }; |