| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <types.h> |
| #include <console/console.h> |
| #include <acpi/acpi.h> |
| #include <acpi/acpigen.h> |
| #include <arch/cpu.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/intel/speedstep.h> |
| #include <cpu/intel/turbo.h> |
| #include <device/device.h> |
| #include "haswell.h" |
| #include "chip.h" |
| |
| #include <southbridge/intel/lynxpoint/pch.h> |
| |
| static int cstate_set_lp[3] = { |
| C_STATE_C1E, |
| C_STATE_C3, |
| C_STATE_C7S_LONG_LAT, |
| }; |
| |
| static int cstate_set_trad[3] = { |
| C_STATE_C1, |
| C_STATE_C3, |
| C_STATE_C6_LONG_LAT, |
| }; |
| |
| 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 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 void generate_T_state_entries(int core, int cores_per_package) |
| { |
| /* Indicate SW_ALL coordination for T-states */ |
| acpigen_write_TSD_package(core, cores_per_package, SW_ALL); |
| |
| /* Indicate FFixedHW so OS will use MSR */ |
| acpigen_write_empty_PTC(); |
| |
| /* Set a T-state limit that can be modified in NVS */ |
| acpigen_write_TPC("\\TLVL"); |
| |
| /* |
| * CPUID.(EAX=6):EAX[5] indicates support |
| * for extended throttle levels. |
| */ |
| if (cpuid_eax(6) & (1 << 5)) |
| acpigen_write_TSS_package( |
| ARRAY_SIZE(tss_table_fine), tss_table_fine); |
| else |
| acpigen_write_TSS_package( |
| ARRAY_SIZE(tss_table_coarse), tss_table_coarse); |
| } |
| |
| static void generate_C_state_entries(void) |
| { |
| acpi_cstate_t map[3]; |
| int *set; |
| int i; |
| |
| struct cpu_info *info; |
| struct cpu_driver *cpu; |
| |
| /* Find CPU map of supported C-states */ |
| info = cpu_info(); |
| if (!info) |
| return; |
| cpu = find_cpu_driver(info->cpu); |
| if (!cpu || !cpu->cstates) |
| return; |
| |
| if (haswell_is_ult()) |
| set = cstate_set_lp; |
| else |
| set = cstate_set_trad; |
| |
| for (i = 0; i < ARRAY_SIZE(map); i++) { |
| map[i] = cpu->cstates[set[i]]; |
| map[i].ctype = i + 1; |
| } |
| |
| /* Generate C-state tables */ |
| acpigen_write_CST_package(map, ARRAY_SIZE(map)); |
| } |
| |
| 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 void generate_P_state_entries(int core, int cores_per_package) |
| { |
| 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 * CPU_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 */ |
| acpigen_write_empty_PCT(); |
| |
| /* Write _PPC with no limit on supported P-state */ |
| acpigen_write_PPC_NVS(); |
| |
| /* Write PSD indicating configured coordination type */ |
| acpigen_write_PSD_package(core, 1, coord_type); |
| |
| /* Add P-state entries in _PSS table */ |
| 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 */ |
| acpigen_write_package(num_entries + 2); |
| |
| msr = rdmsr(MSR_TURBO_RATIO_LIMIT); |
| ratio_turbo = msr.lo & 0xff; |
| |
| /* Add entry for Turbo ratio */ |
| 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 */ |
| acpigen_write_package(num_entries + 1); |
| } |
| |
| /* First regular entry is max non-turbo ratio */ |
| 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 * CPU_BCLK; |
| |
| 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 */ |
| acpigen_pop_len(); |
| } |
| |
| void generate_cpu_entries(const struct device *device) |
| { |
| int coreID, cpuID, pcontrol_blk = get_pmbase(), 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 \_SB.CPUx */ |
| acpigen_write_processor( |
| (cpuID - 1) * cores_per_package+coreID - 1, |
| pcontrol_blk, plen); |
| |
| /* Generate P-state tables */ |
| generate_P_state_entries( |
| coreID - 1, cores_per_package); |
| |
| /* Generate C-state tables */ |
| generate_C_state_entries(); |
| |
| /* Generate T-state tables */ |
| generate_T_state_entries( |
| cpuID - 1, cores_per_package); |
| |
| acpigen_pop_len(); |
| } |
| } |
| |
| /* PPKG is usually used for thermal management |
| of the first and only package. */ |
| acpigen_write_processor_package("PPKG", 0, cores_per_package); |
| |
| /* Add a method to notify processor nodes */ |
| acpigen_write_processor_cnot(cores_per_package); |
| } |
| |
| struct chip_operations cpu_intel_haswell_ops = { |
| CHIP_NAME("Intel Haswell CPU") |
| }; |