From 97c5464443306f26b61cec3a0f50108a5c06b7ef Mon Sep 17 00:00:00 2001 From: Sumeet R Pawnikar Date: Sun, 10 May 2020 01:24:11 +0530 Subject: skylake: update processor power limits configuration Update processor power limit configuration parameters based on common code base support for Intel Skylake SoC based platforms. BRANCH=None BUG=None TEST=Built and tested on nami system Change-Id: Idc82f3d2f805b92fb3005d2f49098e55cb142e45 Signed-off-by: Sumeet R Pawnikar Reviewed-on: https://review.coreboot.org/c/coreboot/+/41238 Tested-by: build bot (Jenkins) Reviewed-by: Tim Wawrzynczak --- src/soc/intel/skylake/cpu.c | 190 -------------------------------------------- 1 file changed, 190 deletions(-) (limited to 'src/soc/intel/skylake/cpu.c') diff --git a/src/soc/intel/skylake/cpu.c b/src/soc/intel/skylake/cpu.c index 1aba7f6a47..28572e5948 100644 --- a/src/soc/intel/skylake/cpu.c +++ b/src/soc/intel/skylake/cpu.c @@ -30,196 +30,6 @@ #include "chip.h" -/* 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, -}; - -/* - * 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, tdp_pl2, tdp_pl1; - u8 power_limit_1_val; - - config_t *conf = config_of_soc(); - - if (power_limit_1_time >= ARRAY_SIZE(power_limit_time_sec_to_msr)) - power_limit_1_time = ARRAY_SIZE(power_limit_time_sec_to_msr) - 1; - - if (!(msr.lo & PLATFORM_INFO_SET_TDP)) - return; - - /* Get units */ - msr = rdmsr(MSR_PKG_POWER_SKU_UNIT); - power_unit = 1 << (msr.lo & 0xf); - - /* 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; - tdp_pl1 = ((conf->tdp_pl1_override == 0) ? - tdp : (conf->tdp_pl1_override * power_unit)); - limit.lo |= (tdp_pl1 & PKG_POWER_LIMIT_MASK); - - /* Set PL1 Pkg Power clamp bit */ - limit.lo |= PKG_POWER_LIMIT_CLAMP; - - 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 if no config given */ - limit.hi = 0; - tdp_pl2 = (conf->tdp_pl2_override == 0) ? - (tdp * 125) / 100 : (conf->tdp_pl2_override * power_unit); - printk(BIOS_DEBUG, "CPU PL2 = %u Watts\n", tdp_pl2 / power_unit); - limit.hi |= (tdp_pl2) & PKG_POWER_LIMIT_MASK; - limit.hi |= PKG_POWER_LIMIT_CLAMP; - limit.hi |= PKG_POWER_LIMIT_EN; - - /* Power limit 2 time is only programmable on server SKU */ - wrmsr(MSR_PKG_POWER_LIMIT, limit); - - /* Set PL2 power limit values in MCHBAR and disable PL1 */ - MCHBAR32(MCH_PKG_POWER_LIMIT_LO) = limit.lo & (~(PKG_POWER_LIMIT_EN)); - MCHBAR32(MCH_PKG_POWER_LIMIT_HI) = limit.hi; - - /* Set PsysPl2 */ - if (conf->tdp_psyspl2) { - limit = rdmsr(MSR_PLATFORM_POWER_LIMIT); - limit.hi = 0; - printk(BIOS_DEBUG, "CPU PsysPL2 = %u Watts\n", - conf->tdp_psyspl2); - limit.hi |= (conf->tdp_psyspl2 * power_unit) & - PKG_POWER_LIMIT_MASK; - limit.hi |= PKG_POWER_LIMIT_CLAMP; - limit.hi |= PKG_POWER_LIMIT_EN; - - wrmsr(MSR_PLATFORM_POWER_LIMIT, limit); - } - - /* Set PsysPl3 */ - if (conf->tdp_psyspl3) { - limit = rdmsr(MSR_PL3_CONTROL); - limit.lo = 0; - printk(BIOS_DEBUG, "CPU PsysPL3 = %u Watts\n", - conf->tdp_psyspl3); - limit.lo |= (conf->tdp_psyspl3 * power_unit) & - PKG_POWER_LIMIT_MASK; - /* Enable PsysPl3 */ - limit.lo |= PKG_POWER_LIMIT_EN; - /* set PsysPl3 time window */ - limit.lo |= (conf->tdp_psyspl3_time & - PKG_POWER_LIMIT_TIME_MASK) << - PKG_POWER_LIMIT_TIME_SHIFT; - /* set PsysPl3 duty cycle */ - limit.lo |= (conf->tdp_psyspl3_dutycycle & - PKG_POWER_LIMIT_DUTYCYCLE_MASK) << - PKG_POWER_LIMIT_DUTYCYCLE_SHIFT; - wrmsr(MSR_PL3_CONTROL, limit); - } - - /* Set Pl4 */ - if (conf->tdp_pl4) { - limit = rdmsr(MSR_VR_CURRENT_CONFIG); - limit.lo = 0; - printk(BIOS_DEBUG, "CPU PL4 = %u Watts\n", - conf->tdp_pl4); - limit.lo |= (conf->tdp_pl4 * power_unit) & - PKG_POWER_LIMIT_MASK; - wrmsr(MSR_VR_CURRENT_CONFIG, limit); - } - - /* Set DDR RAPL power limit by copying from MMIO to MSR */ - msr.lo = MCHBAR32(MCH_DDR_POWER_LIMIT_LO); - msr.hi = MCHBAR32(MCH_DDR_POWER_LIMIT_HI); - wrmsr(MSR_DDR_RAPL_LIMIT, msr); - - /* Use nominal TDP values for CPUs with configurable TDP */ - if (cpu_config_tdp_levels()) { - limit.hi = 0; - limit.lo = cpu_get_tdp_nominal_ratio(); - wrmsr(MSR_TURBO_ACTIVATION_RATIO, limit); - } -} - static void configure_thermal_target(void) { config_t *conf = config_of_soc(); -- cgit v1.2.3