diff options
Diffstat (limited to 'src/cpu/intel/model_2065x/model_2065x_init.c')
-rw-r--r-- | src/cpu/intel/model_2065x/model_2065x_init.c | 483 |
1 files changed, 483 insertions, 0 deletions
diff --git a/src/cpu/intel/model_2065x/model_2065x_init.c b/src/cpu/intel/model_2065x/model_2065x_init.c new file mode 100644 index 0000000000..bdbddfba34 --- /dev/null +++ b/src/cpu/intel/model_2065x/model_2065x_init.c @@ -0,0 +1,483 @@ +/* + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include <console/console.h> +#include <device/device.h> +#include <device/pci.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 <usbdebug.h> +#include "model_2065x.h" +#include "chip.h" + +/* + * List of suported 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 } +}; + +static void enable_vmx(void) +{ + struct cpuid_result regs; + msr_t msr; + int enable = CONFIG_ENABLE_VMX; + + regs = cpuid(1); + /* Check that the VMX is supported before reading or writing the MSR. */ + if (!((regs.ecx & CPUID_VMX) || (regs.ecx & CPUID_SMX))) + return; + + msr = rdmsr(IA32_FEATURE_CONTROL); + + if (msr.lo & (1 << 0)) { + printk(BIOS_ERR, "VMX is locked, so %s will do nothing\n", __func__); + /* VMX locked. If we set it again we get an illegal + * instruction + */ + return; + } + + /* The IA32_FEATURE_CONTROL MSR may initialize with random values. + * It must be cleared regardless of VMX config setting. + */ + msr.hi = msr.lo = 0; + + printk(BIOS_DEBUG, "%s VMX\n", enable ? "Enabling" : "Disabling"); + + /* Even though the Intel manual says you must set the lock bit in addition + * to the VMX bit in order for VMX to work, it is incorrect. Thus we leave + * it unlocked for the OS to manage things itself. This is good for a few + * reasons: + * - No need to reflash the bios just to toggle the lock bit. + * - The VMX bits really really should match each other across cores, so + * hard locking it on one while another has the opposite setting can + * easily lead to crashes as code using VMX migrates between them. + * - Vendors that want to "upsell" from a bios that disables+locks to + * one that doesn't is sleazy. + * By leaving this to the OS (e.g. Linux), people can do exactly what they + * want on the fly, and do it correctly (e.g. across multiple cores). + */ + if (enable) { + msr.lo |= (1 << 2); + if (regs.ecx & CPUID_SMX) + msr.lo |= (1 << 1); + } + + wrmsr(IA32_FEATURE_CONTROL, msr); +} + +/* 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; +} + + +static void configure_thermal_target(void) +{ + struct cpu_intel_model_2065x_config *conf; + device_t 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 activaiton 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); + +#ifdef DISABLED + /* Enable package critical interrupt only */ + msr.lo = 1 << 4; + msr.hi = 0; + wrmsr(IA32_PACKAGE_THERM_INTERRUPT, msr); +#endif +} + +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) * SANDYBRIDGE_BCLK); +} + +static void set_energy_perf_bias(u8 policy) +{ +#ifdef DISABLED + 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); +#endif +} + +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); +} + +#if CONFIG_USBDEBUG +static unsigned ehci_debug_addr; +#endif + +/* + * Initialize any extra cores/threads in this package. + */ +static void intel_cores_init(device_t cpu) +{ + struct cpuid_result result; + unsigned 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; + device_t new; + + /* Build the cpu device path */ + cpu_path.type = DEVICE_PATH_APIC; + cpu_path.apic.apic_id = + cpu->path.apic.apic_id + (i & 1) + ((i & 2) << 1); + + /* 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); + +#if CONFIG_SMP && CONFIG_MAX_CPUS > 1 + /* Start the new cpu */ + if (!start_cpu(new)) { + /* Record the error in cpu? */ + printk(BIOS_ERR, "CPU %u would not start!\n", + new->path.apic.apic_id); + } +#endif + } +} + +static void model_2065x_init(device_t cpu) +{ + char processor_name[49]; + struct cpuid_result cpuid_regs; + + /* 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); + printk(BIOS_INFO, "CPU:lapic=%ld, boot_cpu=%d\n", lapicid (), boot_cpu ()); +#if CONFIG_USBDEBUG + // Is this caution really needed? + if(!ehci_debug_addr) + ehci_debug_addr = get_ehci_debug(); + set_ehci_debug(0); +#endif + + /* Setup MTRRs based on physical address size */ + cpuid_regs = cpuid(0x80000008); + x86_setup_fixed_mtrrs(); + x86_setup_var_mtrrs(cpuid_regs.eax & 0xff, 2); + x86_mtrr_check(); + + /* Setup Page Attribute Tables (PAT) */ + // TODO set up PAT + +#if CONFIG_USBDEBUG + set_ehci_debug(ehci_debug_addr); +#endif + + /* Enable the local cpu apics */ + enable_lapic_tpr(); + setup_lapic(); + + /* Enable virtualization if enabled in CMOS */ + enable_vmx(); + + /* Configure Enhanced SpeedStep and Thermal Sensors */ + configure_misc(); + + /* Thermal throttle activation offset */ + configure_thermal_target(); + + /* 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_2065x_init, +}; + +static struct cpu_device_id cpu_table[] = { + { X86_VENDOR_INTEL, 0x20655 }, /* Intel Nehalem */ + { 0, 0 }, +}; + +static const struct cpu_driver driver __cpu_driver = { + .ops = &cpu_dev_ops, + .id_table = cpu_table, + .cstates = cstate_map, +}; + |