| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2007-2009 coresystems GmbH |
| * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; version 2 of |
| * the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <string.h> |
| #include <arch/acpi.h> |
| #include <cpu/cpu.h> |
| #include <cpu/x86/mtrr.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/x86/lapic.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 <pc80/mc146818rtc.h> |
| #include "model_206ax.h" |
| #include "chip.h" |
| #include <cpu/intel/smm/gen1/smi.h> |
| #include <cpu/intel/common/common.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, |
| .resv = 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, |
| .resv = 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, |
| .resv = 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, |
| .resv = 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, |
| .resv = 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, |
| .resv = ACPI_FFIXEDHW_FLAG_HW_COORD, |
| } |
| }, |
| { 0 } |
| }; |
| |
| /* Convert time in seconds to POWER_LIMIT_1_TIME MSR value */ |
| static const u8 power_limit_time_sec_to_msr[] = { |
| [0] = 0x00, |
| [1] = 0x0a, |
| [2] = 0x0b, |
| [3] = 0x4b, |
| [4] = 0x0c, |
| [5] = 0x2c, |
| [6] = 0x4c, |
| [7] = 0x6c, |
| [8] = 0x0d, |
| [10] = 0x2d, |
| [12] = 0x4d, |
| [14] = 0x6d, |
| [16] = 0x0e, |
| [20] = 0x2e, |
| [24] = 0x4e, |
| [28] = 0x6e, |
| [32] = 0x0f, |
| [40] = 0x2f, |
| [48] = 0x4f, |
| [56] = 0x6f, |
| [64] = 0x10, |
| [80] = 0x30, |
| [96] = 0x50, |
| [112] = 0x70, |
| [128] = 0x11, |
| }; |
| |
| /* Convert POWER_LIMIT_1_TIME MSR value to seconds */ |
| static const u8 power_limit_time_msr_to_sec[] = { |
| [0x00] = 0, |
| [0x0a] = 1, |
| [0x0b] = 2, |
| [0x4b] = 3, |
| [0x0c] = 4, |
| [0x2c] = 5, |
| [0x4c] = 6, |
| [0x6c] = 7, |
| [0x0d] = 8, |
| [0x2d] = 10, |
| [0x4d] = 12, |
| [0x6d] = 14, |
| [0x0e] = 16, |
| [0x2e] = 20, |
| [0x4e] = 24, |
| [0x6e] = 28, |
| [0x0f] = 32, |
| [0x2f] = 40, |
| [0x4f] = 48, |
| [0x6f] = 56, |
| [0x10] = 64, |
| [0x30] = 80, |
| [0x50] = 96, |
| [0x70] = 112, |
| [0x11] = 128, |
| }; |
| |
| 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; |
| } |
| |
| /* |
| * Configure processor power limits if possible |
| * This must be done AFTER set of BIOS_RESET_CPL |
| */ |
| void set_power_limits(u8 power_limit_1_time) |
| { |
| msr_t msr = rdmsr(MSR_PLATFORM_INFO); |
| msr_t limit; |
| unsigned int power_unit; |
| unsigned int tdp, min_power, max_power, max_time; |
| u8 power_limit_1_val; |
| |
| if (power_limit_1_time >= ARRAY_SIZE(power_limit_time_sec_to_msr)) |
| return; |
| |
| if (!(msr.lo & PLATFORM_INFO_SET_TDP)) |
| return; |
| |
| /* Get units */ |
| msr = rdmsr(MSR_PKG_POWER_SKU_UNIT); |
| power_unit = 2 << ((msr.lo & 0xf) - 1); |
| |
| /* Get power defaults for this SKU */ |
| msr = rdmsr(MSR_PKG_POWER_SKU); |
| tdp = msr.lo & 0x7fff; |
| min_power = (msr.lo >> 16) & 0x7fff; |
| max_power = msr.hi & 0x7fff; |
| max_time = (msr.hi >> 16) & 0x7f; |
| |
| printk(BIOS_DEBUG, "CPU TDP: %u Watts\n", tdp / power_unit); |
| |
| if (power_limit_time_msr_to_sec[max_time] > power_limit_1_time) |
| power_limit_1_time = power_limit_time_msr_to_sec[max_time]; |
| |
| if (min_power > 0 && tdp < min_power) |
| tdp = min_power; |
| |
| if (max_power > 0 && tdp > max_power) |
| tdp = max_power; |
| |
| power_limit_1_val = power_limit_time_sec_to_msr[power_limit_1_time]; |
| |
| /* Set long term power limit to TDP */ |
| limit.lo = 0; |
| limit.lo |= tdp & PKG_POWER_LIMIT_MASK; |
| limit.lo |= PKG_POWER_LIMIT_EN; |
| limit.lo |= (power_limit_1_val & PKG_POWER_LIMIT_TIME_MASK) << |
| PKG_POWER_LIMIT_TIME_SHIFT; |
| |
| /* Set short term power limit to 1.25 * TDP */ |
| limit.hi = 0; |
| limit.hi |= ((tdp * 125) / 100) & PKG_POWER_LIMIT_MASK; |
| limit.hi |= PKG_POWER_LIMIT_EN; |
| /* Power limit 2 time is only programmable on SNB EP/EX */ |
| |
| wrmsr(MSR_PKG_POWER_LIMIT, limit); |
| |
| /* Use nominal TDP values for CPUs with configurable TDP */ |
| if (cpu_config_tdp_levels()) { |
| msr = rdmsr(MSR_CONFIG_TDP_NOMINAL); |
| limit.hi = 0; |
| limit.lo = msr.lo & 0xff; |
| wrmsr(MSR_TURBO_ACTIVATION_RATIO, limit); |
| } |
| } |
| |
| static void configure_c_states(void) |
| { |
| msr_t msr; |
| |
| msr = rdmsr(MSR_PMG_CST_CONFIG_CONTROL); |
| msr.lo |= (1 << 28); // C1 Auto Undemotion Enable |
| msr.lo |= (1 << 27); // C3 Auto Undemotion Enable |
| msr.lo |= (1 << 26); // C1 Auto Demotion Enable |
| msr.lo |= (1 << 25); // C3 Auto Demotion Enable |
| msr.lo &= ~(1 << 10); // Disable IO MWAIT redirection |
| msr.lo |= 7; // No package C-state limit |
| wrmsr(MSR_PMG_CST_CONFIG_CONTROL, msr); |
| |
| msr = rdmsr(MSR_PMG_IO_CAPTURE_ADDR); |
| msr.lo &= ~0x7ffff; |
| msr.lo |= (PMB0_BASE + 4); // LVL_2 base address |
| msr.lo |= (2 << 16); // CST Range: C7 is max C-state |
| wrmsr(MSR_PMG_IO_CAPTURE_ADDR, msr); |
| |
| msr = rdmsr(MSR_MISC_PWR_MGMT); |
| msr.lo &= ~(1 << 0); // Enable P-state HW_ALL coordination |
| wrmsr(MSR_MISC_PWR_MGMT, msr); |
| |
| msr = rdmsr(MSR_POWER_CTL); |
| msr.lo |= (1 << 18); // Enable Energy Perf Bias MSR 0x1b0 |
| msr.lo |= (1 << 1); // C1E Enable |
| msr.lo |= (1 << 0); // Bi-directional PROCHOT# |
| wrmsr(MSR_POWER_CTL, msr); |
| |
| /* C3 Interrupt Response Time Limit */ |
| msr.hi = 0; |
| msr.lo = IRTL_VALID | IRTL_1024_NS | 0x50; |
| wrmsr(MSR_PKGC3_IRTL, msr); |
| |
| /* C6 Interrupt Response Time Limit */ |
| msr.hi = 0; |
| msr.lo = IRTL_VALID | IRTL_1024_NS | 0x68; |
| wrmsr(MSR_PKGC6_IRTL, msr); |
| |
| /* C7 Interrupt Response Time Limit */ |
| msr.hi = 0; |
| msr.lo = IRTL_VALID | IRTL_1024_NS | 0x6D; |
| wrmsr(MSR_PKGC7_IRTL, msr); |
| |
| /* Primary Plane Current Limit */ |
| msr = rdmsr(MSR_PP0_CURRENT_CONFIG); |
| msr.lo &= ~0x1fff; |
| msr.lo |= PP0_CURRENT_LIMIT; |
| wrmsr(MSR_PP0_CURRENT_CONFIG, msr); |
| |
| /* Secondary Plane Current Limit */ |
| msr = rdmsr(MSR_PP1_CURRENT_CONFIG); |
| msr.lo &= ~0x1fff; |
| if (cpuid_eax(1) >= 0x30600) |
| msr.lo |= PP1_CURRENT_LIMIT_IVB; |
| else |
| msr.lo |= PP1_CURRENT_LIMIT_SNB; |
| wrmsr(MSR_PP1_CURRENT_CONFIG, msr); |
| } |
| |
| static void configure_thermal_target(void) |
| { |
| struct cpu_intel_model_206ax_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); |
| |
| /* Enable package critical interrupt only */ |
| msr.lo = 1 << 4; |
| msr.hi = 0; |
| wrmsr(IA32_PACKAGE_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 configure_dca_cap(void) |
| { |
| struct cpuid_result cpuid_regs; |
| msr_t msr; |
| |
| /* Check feature flag in CPUID.(EAX=1):ECX[18]==1 */ |
| cpuid_regs = cpuid(1); |
| if (cpuid_regs.ecx & (1 << 18)) { |
| msr = rdmsr(IA32_PLATFORM_DCA_CAP); |
| msr.lo |= 1; |
| wrmsr(IA32_PLATFORM_DCA_CAP, 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) * SANDYBRIDGE_BCLK); |
| } |
| |
| static void set_energy_perf_bias(u8 policy) |
| { |
| msr_t msr; |
| |
| /* Energy Policy is bits 3:0 */ |
| msr = rdmsr(IA32_ENERGY_PERFORMANCE_BIAS); |
| msr.lo &= ~0xf; |
| msr.lo |= policy & 0xf; |
| wrmsr(IA32_ENERGY_PERFORMANCE_BIAS, msr); |
| |
| printk(BIOS_DEBUG, "model_x06ax: energy policy set to %u\n", |
| policy); |
| } |
| |
| 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); |
| } |
| |
| int cpu_get_apic_id_map(int *apic_id_map) |
| { |
| struct cpuid_result result; |
| unsigned int threads_per_package, threads_per_core, i, shift = 0; |
| |
| /* Logical processors (threads) per core */ |
| result = cpuid_ext(0xb, 0); |
| threads_per_core = result.ebx & 0xffff; |
| |
| /* Logical processors (threads) per package */ |
| result = cpuid_ext(0xb, 1); |
| threads_per_package = result.ebx & 0xffff; |
| |
| if (threads_per_core == 1) |
| shift++; |
| |
| for (i = 0; i < threads_per_package && i < CONFIG_MAX_CPUS; i++) |
| apic_id_map[i] = i << shift; |
| |
| return threads_per_package; |
| } |
| |
| /* |
| * Initialize any extra cores/threads in this package. |
| */ |
| static void intel_cores_init(struct device *cpu) |
| { |
| struct cpuid_result result; |
| unsigned int threads_per_package, threads_per_core, i; |
| |
| /* Logical processors (threads) per core */ |
| result = cpuid_ext(0xb, 0); |
| threads_per_core = result.ebx & 0xffff; |
| |
| /* Logical processors (threads) per package */ |
| result = cpuid_ext(0xb, 1); |
| threads_per_package = result.ebx & 0xffff; |
| |
| /* Only initialize extra cores from BSP */ |
| if (cpu->path.apic.apic_id) |
| return; |
| |
| printk(BIOS_DEBUG, "CPU: %u has %u cores, %u threads per core\n", |
| cpu->path.apic.apic_id, threads_per_package/threads_per_core, |
| threads_per_core); |
| |
| for (i = 1; i < threads_per_package; ++i) { |
| struct device_path cpu_path; |
| struct device *new; |
| |
| /* Build the CPU device path */ |
| cpu_path.type = DEVICE_PATH_APIC; |
| cpu_path.apic.apic_id = |
| cpu->path.apic.apic_id + i; |
| |
| /* Update APIC ID if no hyperthreading */ |
| if (threads_per_core == 1) |
| cpu_path.apic.apic_id <<= 1; |
| |
| /* Allocate the new CPU device structure */ |
| new = alloc_dev(cpu->bus, &cpu_path); |
| if (!new) |
| continue; |
| |
| printk(BIOS_DEBUG, "CPU: %u has core %u\n", |
| cpu->path.apic.apic_id, |
| new->path.apic.apic_id); |
| |
| /* Start the new CPU */ |
| if (is_smp_boot() && !start_cpu(new)) { |
| /* Record the error in cpu? */ |
| printk(BIOS_ERR, "CPU %u would not start!\n", |
| new->path.apic.apic_id); |
| } |
| } |
| } |
| |
| static void model_206ax_init(struct device *cpu) |
| { |
| char processor_name[49]; |
| |
| /* Turn on caching if we haven't already */ |
| x86_enable_cache(); |
| |
| intel_update_microcode_from_cbfs(); |
| |
| /* Clear out pending MCEs */ |
| configure_mca(); |
| |
| /* Print processor name */ |
| fill_processor_name(processor_name); |
| printk(BIOS_INFO, "CPU: %s.\n", processor_name); |
| |
| /* Setup MTRRs based on physical address size */ |
| x86_setup_mtrrs_with_detect(); |
| x86_mtrr_check(); |
| |
| /* 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(); |
| |
| /* Configure C States */ |
| configure_c_states(); |
| |
| /* Configure Enhanced SpeedStep and Thermal Sensors */ |
| configure_misc(); |
| |
| /* Thermal throttle activation offset */ |
| configure_thermal_target(); |
| |
| /* Enable Direct Cache Access */ |
| configure_dca_cap(); |
| |
| /* Set energy policy */ |
| set_energy_perf_bias(ENERGY_POLICY_NORMAL); |
| |
| /* Set Max Ratio */ |
| set_max_ratio(); |
| |
| /* Enable Turbo */ |
| enable_turbo(); |
| |
| /* Start up extra cores */ |
| intel_cores_init(cpu); |
| } |
| |
| static struct device_operations cpu_dev_ops = { |
| .init = model_206ax_init, |
| }; |
| |
| static const struct cpu_device_id cpu_table[] = { |
| { X86_VENDOR_INTEL, 0x206a0 }, /* Intel Sandybridge */ |
| { X86_VENDOR_INTEL, 0x206a6 }, /* Intel Sandybridge D1 */ |
| { X86_VENDOR_INTEL, 0x206a7 }, /* Intel Sandybridge D2/J1 */ |
| { X86_VENDOR_INTEL, 0x306a0 }, /* Intel IvyBridge */ |
| { X86_VENDOR_INTEL, 0x306a2 }, /* Intel IvyBridge */ |
| { X86_VENDOR_INTEL, 0x306a4 }, /* Intel IvyBridge */ |
| { X86_VENDOR_INTEL, 0x306a5 }, /* Intel IvyBridge */ |
| { X86_VENDOR_INTEL, 0x306a6 }, /* Intel IvyBridge */ |
| { X86_VENDOR_INTEL, 0x306a8 }, /* Intel IvyBridge */ |
| { X86_VENDOR_INTEL, 0x306a9 }, /* Intel IvyBridge */ |
| { 0, 0 }, |
| }; |
| |
| static const struct cpu_driver driver __cpu_driver = { |
| .ops = &cpu_dev_ops, |
| .id_table = cpu_table, |
| .cstates = cstate_map, |
| }; |