| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2009 coresystems GmbH |
| * Copyright (C) 2011 The Chromium OS 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 <types.h> |
| #include <console/console.h> |
| #include <arch/acpi.h> |
| #include <arch/acpigen.h> |
| #include <arch/cpu.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/x86/lapic.h> |
| #include <cpu/intel/acpi.h> |
| #include <cpu/intel/speedstep.h> |
| #include <cpu/intel/turbo.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include "model_206ax.h" |
| #include "chip.h" |
| |
| static int get_cores_per_package(void) |
| { |
| struct cpuinfo_x86 c; |
| struct cpuid_result result; |
| int cores = 1; |
| |
| get_fms(&c, cpuid_eax(1)); |
| if (c.x86 != 6) |
| return 1; |
| |
| result = cpuid_ext(0xb, 1); |
| cores = result.ebx & 0xff; |
| |
| return cores; |
| } |
| |
| static int generate_cstate_entries(acpi_cstate_t *cstates, |
| int c1, int c2, int c3) |
| { |
| int length, cstate_count = 0; |
| |
| /* Count number of active C-states */ |
| if (c1 > 0) |
| ++cstate_count; |
| if (c2 > 0) |
| ++cstate_count; |
| if (c3 > 0) |
| ++cstate_count; |
| if (!cstate_count) |
| return 0; |
| |
| length = acpigen_write_package(cstate_count + 1); |
| length += acpigen_write_byte(cstate_count); |
| |
| /* Add an entry if the level is enabled */ |
| if (c1 > 0) { |
| cstates[c1].ctype = 1; |
| length += acpigen_write_CST_package_entry(&cstates[c1]); |
| } |
| if (c2 > 0) { |
| cstates[c2].ctype = 2; |
| length += acpigen_write_CST_package_entry(&cstates[c2]); |
| } |
| if (c3 > 0) { |
| cstates[c3].ctype = 3; |
| length += acpigen_write_CST_package_entry(&cstates[c3]); |
| } |
| |
| acpigen_patch_len(length - 1); |
| return length; |
| } |
| |
| static int generate_C_state_entries(void) |
| { |
| struct cpu_driver *cpu; |
| struct device *cpu_dev; |
| int len, lenif; |
| device_t lapic; |
| struct cpu_intel_model_206ax_config *conf = NULL; |
| |
| /* Find the SpeedStep CPU in the device tree using magic APIC ID */ |
| lapic = dev_find_lapic(SPEEDSTEP_APIC_MAGIC); |
| if (!lapic) |
| return 0; |
| conf = lapic->chip_info; |
| if (!conf) |
| return 0; |
| |
| /* Find CPU map of supported C-states */ |
| cpu_dev = dev_find_lapic(lapicid()); |
| if (!cpu_dev) |
| return 0; |
| cpu = find_cpu_driver(cpu_dev); |
| if (!cpu || !cpu->cstates) |
| return 0; |
| |
| len = acpigen_emit_byte(0x14); /* MethodOp */ |
| len += acpigen_write_len_f(); /* PkgLength */ |
| len += acpigen_emit_namestring("_CST"); |
| len += acpigen_emit_byte(0x00); /* No Arguments */ |
| |
| /* If running on AC power */ |
| len += acpigen_emit_byte(0xa0); /* IfOp */ |
| lenif = acpigen_write_len_f(); /* PkgLength */ |
| lenif += acpigen_emit_namestring("PWRS"); |
| lenif += acpigen_emit_byte(0xa4); /* ReturnOp */ |
| lenif += generate_cstate_entries(cpu->cstates, conf->c1_acpower, |
| conf->c2_acpower, conf->c3_acpower); |
| acpigen_patch_len(lenif - 1); |
| len += lenif; |
| |
| /* Else on battery power */ |
| len += acpigen_emit_byte(0xa4); /* ReturnOp */ |
| len += generate_cstate_entries(cpu->cstates, conf->c1_battery, |
| conf->c2_battery, conf->c3_battery); |
| acpigen_patch_len(len - 1); |
| return len; |
| } |
| |
| static acpi_tstate_t tss_table_fine[] = { |
| { 100, 1000, 0, 0x00, 0 }, |
| { 94, 940, 0, 0x1f, 0 }, |
| { 88, 880, 0, 0x1e, 0 }, |
| { 82, 820, 0, 0x1d, 0 }, |
| { 75, 760, 0, 0x1c, 0 }, |
| { 69, 700, 0, 0x1b, 0 }, |
| { 63, 640, 0, 0x1a, 0 }, |
| { 57, 580, 0, 0x19, 0 }, |
| { 50, 520, 0, 0x18, 0 }, |
| { 44, 460, 0, 0x17, 0 }, |
| { 38, 400, 0, 0x16, 0 }, |
| { 32, 340, 0, 0x15, 0 }, |
| { 25, 280, 0, 0x14, 0 }, |
| { 19, 220, 0, 0x13, 0 }, |
| { 13, 160, 0, 0x12, 0 }, |
| }; |
| |
| static acpi_tstate_t tss_table_coarse[] = { |
| { 100, 1000, 0, 0x00, 0 }, |
| { 88, 875, 0, 0x1f, 0 }, |
| { 75, 750, 0, 0x1e, 0 }, |
| { 63, 625, 0, 0x1d, 0 }, |
| { 50, 500, 0, 0x1c, 0 }, |
| { 38, 375, 0, 0x1b, 0 }, |
| { 25, 250, 0, 0x1a, 0 }, |
| { 13, 125, 0, 0x19, 0 }, |
| }; |
| |
| static int generate_T_state_entries(int core, int cores_per_package) |
| { |
| int len; |
| |
| /* Indicate SW_ALL coordination for T-states */ |
| len = acpigen_write_TSD_package(core, cores_per_package, SW_ALL); |
| |
| /* Indicate FFixedHW so OS will use MSR */ |
| len += acpigen_write_empty_PTC(); |
| |
| /* Set a T-state limit that can be modified in NVS */ |
| len += acpigen_write_TPC("\\TLVL"); |
| |
| /* |
| * CPUID.(EAX=6):EAX[5] indicates support |
| * for extended throttle levels. |
| */ |
| if (cpuid_eax(6) & (1 << 5)) |
| len += acpigen_write_TSS_package( |
| ARRAY_SIZE(tss_table_fine), tss_table_fine); |
| else |
| len += acpigen_write_TSS_package( |
| ARRAY_SIZE(tss_table_coarse), tss_table_coarse); |
| |
| return len; |
| } |
| |
| static int calculate_power(int tdp, int p1_ratio, int ratio) |
| { |
| u32 m; |
| u32 power; |
| |
| /* |
| * M = ((1.1 - ((p1_ratio - ratio) * 0.00625)) / 1.1) ^ 2 |
| * |
| * Power = (ratio / p1_ratio) * m * tdp |
| */ |
| |
| m = (110000 - ((p1_ratio - ratio) * 625)) / 11; |
| m = (m * m) / 1000; |
| |
| power = ((ratio * 100000 / p1_ratio) / 100); |
| power *= (m / 100) * (tdp / 1000); |
| power /= 1000; |
| |
| return (int)power; |
| } |
| |
| static int generate_P_state_entries(int core, int cores_per_package) |
| { |
| int len, len_pss; |
| int ratio_min, ratio_max, ratio_turbo, ratio_step; |
| int coord_type, power_max, power_unit, num_entries; |
| int ratio, power, clock, clock_max; |
| msr_t msr; |
| |
| /* Determine P-state coordination type from MISC_PWR_MGMT[0] */ |
| msr = rdmsr(MSR_MISC_PWR_MGMT); |
| if (msr.lo & MISC_PWR_MGMT_EIST_HW_DIS) |
| coord_type = SW_ANY; |
| else |
| coord_type = HW_ALL; |
| |
| /* Get bus ratio limits and calculate clock speeds */ |
| msr = rdmsr(MSR_PLATFORM_INFO); |
| ratio_min = (msr.hi >> (40-32)) & 0xff; /* Max Efficiency Ratio */ |
| |
| /* Determine if this CPU has configurable TDP */ |
| if (cpu_config_tdp_levels()) { |
| /* Set max ratio to nominal TDP ratio */ |
| msr = rdmsr(MSR_CONFIG_TDP_NOMINAL); |
| ratio_max = msr.lo & 0xff; |
| } else { |
| /* Max Non-Turbo Ratio */ |
| ratio_max = (msr.lo >> 8) & 0xff; |
| } |
| clock_max = ratio_max * SANDYBRIDGE_BCLK; |
| |
| /* Calculate CPU TDP in mW */ |
| msr = rdmsr(MSR_PKG_POWER_SKU_UNIT); |
| power_unit = 2 << ((msr.lo & 0xf) - 1); |
| msr = rdmsr(MSR_PKG_POWER_SKU); |
| power_max = ((msr.lo & 0x7fff) / power_unit) * 1000; |
| |
| /* Write _PCT indicating use of FFixedHW */ |
| len = acpigen_write_empty_PCT(); |
| |
| /* Write _PPC with no limit on supported P-state */ |
| len += acpigen_write_PPC(0); |
| |
| /* Write PSD indicating configured coordination type */ |
| len += acpigen_write_PSD_package(core, cores_per_package, coord_type); |
| |
| /* Add P-state entries in _PSS table */ |
| len += acpigen_write_name("_PSS"); |
| |
| /* Determine ratio points */ |
| ratio_step = PSS_RATIO_STEP; |
| num_entries = (ratio_max - ratio_min) / ratio_step; |
| while (num_entries > PSS_MAX_ENTRIES-1) { |
| ratio_step <<= 1; |
| num_entries >>= 1; |
| } |
| |
| /* P[T] is Turbo state if enabled */ |
| if (get_turbo_state() == TURBO_ENABLED) { |
| /* _PSS package count including Turbo */ |
| len_pss = acpigen_write_package(num_entries + 2); |
| |
| msr = rdmsr(MSR_TURBO_RATIO_LIMIT); |
| ratio_turbo = msr.lo & 0xff; |
| |
| /* Add entry for Turbo ratio */ |
| len_pss += acpigen_write_PSS_package( |
| clock_max + 1, /*MHz*/ |
| power_max, /*mW*/ |
| PSS_LATENCY_TRANSITION, /*lat1*/ |
| PSS_LATENCY_BUSMASTER, /*lat2*/ |
| ratio_turbo << 8, /*control*/ |
| ratio_turbo << 8); /*status*/ |
| } else { |
| /* _PSS package count without Turbo */ |
| len_pss = acpigen_write_package(num_entries + 1); |
| } |
| |
| /* First regular entry is max non-turbo ratio */ |
| len_pss += acpigen_write_PSS_package( |
| clock_max, /*MHz*/ |
| power_max, /*mW*/ |
| PSS_LATENCY_TRANSITION, /*lat1*/ |
| PSS_LATENCY_BUSMASTER, /*lat2*/ |
| ratio_max << 8, /*control*/ |
| ratio_max << 8); /*status*/ |
| |
| /* Generate the remaining entries */ |
| for (ratio = ratio_min + ((num_entries - 1) * ratio_step); |
| ratio >= ratio_min; ratio -= ratio_step) { |
| |
| /* Calculate power at this ratio */ |
| power = calculate_power(power_max, ratio_max, ratio); |
| clock = ratio * SANDYBRIDGE_BCLK; |
| |
| len_pss += acpigen_write_PSS_package( |
| clock, /*MHz*/ |
| power, /*mW*/ |
| PSS_LATENCY_TRANSITION, /*lat1*/ |
| PSS_LATENCY_BUSMASTER, /*lat2*/ |
| ratio << 8, /*control*/ |
| ratio << 8); /*status*/ |
| } |
| |
| /* Fix package length */ |
| len_pss--; |
| acpigen_patch_len(len_pss); |
| |
| return len + len_pss; |
| } |
| |
| void generate_cpu_entries(void) |
| { |
| int len_pr; |
| int coreID, cpuID, pcontrol_blk = PMB0_BASE, plen = 6; |
| int totalcores = dev_count_cpu(); |
| int cores_per_package = get_cores_per_package(); |
| int numcpus = totalcores/cores_per_package; |
| |
| printk(BIOS_DEBUG, "Found %d CPU(s) with %d core(s) each.\n", |
| numcpus, cores_per_package); |
| |
| for (cpuID=1; cpuID <=numcpus; cpuID++) { |
| for (coreID=1; coreID<=cores_per_package; coreID++) { |
| if (coreID>1) { |
| pcontrol_blk = 0; |
| plen = 0; |
| } |
| |
| /* Generate processor \_PR.CPUx */ |
| len_pr = acpigen_write_processor( |
| (cpuID-1)*cores_per_package+coreID-1, |
| pcontrol_blk, plen); |
| |
| /* Generate P-state tables */ |
| len_pr += generate_P_state_entries( |
| cpuID-1, cores_per_package); |
| |
| /* Generate C-state tables */ |
| len_pr += generate_C_state_entries(); |
| |
| /* Generate T-state tables */ |
| len_pr += generate_T_state_entries( |
| cpuID-1, cores_per_package); |
| |
| len_pr--; |
| acpigen_patch_len(len_pr); |
| } |
| } |
| } |
| |
| struct chip_operations cpu_intel_model_206ax_ops = { |
| CHIP_NAME(CONFIG_CPU_MODEL_NAME) |
| }; |