--- /dev/null
+/*
+ * Copyright (c) 2016 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * Based on code from coreboot src/soc/intel/broadwell/cpu.c
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <cpu.h>
+#include <asm/cpu.h>
+#include <asm/cpu_x86.h>
+#include <asm/cpu_common.h>
+#include <asm/intel_regs.h>
+#include <asm/msr.h>
+#include <asm/post.h>
+#include <asm/turbo.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/pch.h>
+#include <asm/arch/rcb.h>
+
+struct cpu_broadwell_priv {
+ bool ht_disabled;
+};
+
+/* 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 arch_cpu_init_dm(void)
+{
+ struct udevice *dev;
+ int ret;
+
+ /* Start up the LPC so we have serial */
+ ret = uclass_first_device(UCLASS_LPC, &dev);
+ if (ret)
+ return ret;
+ if (!dev)
+ return -ENODEV;
+ ret = cpu_set_flex_ratio_to_tdp_nominal();
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+void set_max_freq(void)
+{
+ msr_t msr, perf_ctl, platform_info;
+
+ /* Check for configurable TDP option */
+ platform_info = msr_read(MSR_PLATFORM_INFO);
+
+ if ((platform_info.hi >> 1) & 3) {
+ /* Set to nominal TDP ratio */
+ msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
+ perf_ctl.lo = (msr.lo & 0xff) << 8;
+ } else {
+ /* Platform Info bits 15:8 give max ratio */
+ msr = msr_read(MSR_PLATFORM_INFO);
+ perf_ctl.lo = msr.lo & 0xff00;
+ }
+
+ perf_ctl.hi = 0;
+ msr_write(IA32_PERF_CTL, perf_ctl);
+
+ debug("CPU: frequency set to %d MHz\n",
+ ((perf_ctl.lo >> 8) & 0xff) * CPU_BCLK);
+}
+
+int arch_cpu_init(void)
+{
+ post_code(POST_CPU_INIT);
+
+ return x86_cpu_init_f();
+}
+
+int print_cpuinfo(void)
+{
+ char processor_name[CPU_MAX_NAME_LEN];
+ const char *name;
+ int ret;
+
+ set_max_freq();
+
+ ret = cpu_common_init();
+ if (ret)
+ return ret;
+ gd->arch.pei_boot_mode = PEI_BOOT_NONE;
+
+ /* Print processor name */
+ name = cpu_get_name(processor_name);
+ printf("CPU: %s\n", name);
+
+ return 0;
+}
+
+/*
+ * The core 100MHz BLCK is disabled in deeper c-states. One needs to calibrate
+ * the 100MHz BCLCK against the 24MHz BLCK to restore the clocks properly
+ * when a core is woken up
+ */
+static int pcode_ready(void)
+{
+ int wait_count;
+ const int delay_step = 10;
+
+ wait_count = 0;
+ do {
+ if (!(readl(MCHBAR_REG(BIOS_MAILBOX_INTERFACE)) &
+ MAILBOX_RUN_BUSY))
+ return 0;
+ wait_count += delay_step;
+ udelay(delay_step);
+ } while (wait_count < 1000);
+
+ return -ETIMEDOUT;
+}
+
+static u32 pcode_mailbox_read(u32 command)
+{
+ int ret;
+
+ ret = pcode_ready();
+ if (ret) {
+ debug("PCODE: mailbox timeout on wait ready\n");
+ return ret;
+ }
+
+ /* Send command and start transaction */
+ writel(command | MAILBOX_RUN_BUSY, MCHBAR_REG(BIOS_MAILBOX_INTERFACE));
+
+ ret = pcode_ready();
+ if (ret) {
+ debug("PCODE: mailbox timeout on completion\n");
+ return ret;
+ }
+
+ /* Read mailbox */
+ return readl(MCHBAR_REG(BIOS_MAILBOX_DATA));
+}
+
+static int pcode_mailbox_write(u32 command, u32 data)
+{
+ int ret;
+
+ ret = pcode_ready();
+ if (ret) {
+ debug("PCODE: mailbox timeout on wait ready\n");
+ return ret;
+ }
+
+ writel(data, MCHBAR_REG(BIOS_MAILBOX_DATA));
+
+ /* Send command and start transaction */
+ writel(command | MAILBOX_RUN_BUSY, MCHBAR_REG(BIOS_MAILBOX_INTERFACE));
+
+ ret = pcode_ready();
+ if (ret) {
+ debug("PCODE: mailbox timeout on completion\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+/* @dev is the CPU device */
+static void initialize_vr_config(struct udevice *dev)
+{
+ int ramp, min_vid;
+ msr_t msr;
+
+ debug("Initializing VR config\n");
+
+ /* Configure VR_CURRENT_CONFIG */
+ msr = msr_read(MSR_VR_CURRENT_CONFIG);
+ /*
+ * Preserve bits 63 and 62. Bit 62 is PSI4 enable, but it is only valid
+ * on ULT systems
+ */
+ msr.hi &= 0xc0000000;
+ msr.hi |= (0x01 << (52 - 32)); /* PSI3 threshold - 1A */
+ msr.hi |= (0x05 << (42 - 32)); /* PSI2 threshold - 5A */
+ msr.hi |= (0x14 << (32 - 32)); /* PSI1 threshold - 20A */
+ msr.hi |= (1 << (62 - 32)); /* Enable PSI4 */
+ /* Leave the max instantaneous current limit (12:0) to default */
+ msr_write(MSR_VR_CURRENT_CONFIG, msr);
+
+ /* Configure VR_MISC_CONFIG MSR */
+ msr = msr_read(MSR_VR_MISC_CONFIG);
+ /* Set the IOUT_SLOPE scalar applied to dIout in U10.1.9 format */
+ msr.hi &= ~(0x3ff << (40 - 32));
+ msr.hi |= (0x200 << (40 - 32)); /* 1.0 */
+ /* Set IOUT_OFFSET to 0 */
+ msr.hi &= ~0xff;
+ /* Set entry ramp rate to slow */
+ msr.hi &= ~(1 << (51 - 32));
+ /* Enable decay mode on C-state entry */
+ msr.hi |= (1 << (52 - 32));
+ /* Set the slow ramp rate */
+ msr.hi &= ~(0x3 << (53 - 32));
+ /* Configure the C-state exit ramp rate */
+ ramp = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "intel,slow-ramp",
+ -1);
+ if (ramp != -1) {
+ /* Configured slow ramp rate */
+ msr.hi |= ((ramp & 0x3) << (53 - 32));
+ /* Set exit ramp rate to slow */
+ msr.hi &= ~(1 << (50 - 32));
+ } else {
+ /* Fast ramp rate / 4 */
+ msr.hi |= (0x01 << (53 - 32));
+ /* Set exit ramp rate to fast */
+ msr.hi |= (1 << (50 - 32));
+ }
+ /* Set MIN_VID (31:24) to allow CPU to have full control */
+ msr.lo &= ~0xff000000;
+ min_vid = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "intel,min-vid",
+ 0);
+ msr.lo |= (min_vid & 0xff) << 24;
+ msr_write(MSR_VR_MISC_CONFIG, msr);
+
+ /* Configure VR_MISC_CONFIG2 MSR */
+ msr = msr_read(MSR_VR_MISC_CONFIG2);
+ msr.lo &= ~0xffff;
+ /*
+ * Allow CPU to control minimum voltage completely (15:8) and
+ * set the fast ramp voltage in 10mV steps
+ */
+ if (cpu_get_family_model() == BROADWELL_FAMILY_ULT)
+ msr.lo |= 0x006a; /* 1.56V */
+ else
+ msr.lo |= 0x006f; /* 1.60V */
+ msr_write(MSR_VR_MISC_CONFIG2, msr);
+
+ /* Set C9/C10 VCC Min */
+ pcode_mailbox_write(MAILBOX_BIOS_CMD_WRITE_C9C10_VOLTAGE, 0x1f1f);
+}
+
+static int calibrate_24mhz_bclk(void)
+{
+ int err_code;
+ int ret;
+
+ ret = pcode_ready();
+ if (ret)
+ return ret;
+
+ /* A non-zero value initiates the PCODE calibration */
+ writel(~0, MCHBAR_REG(BIOS_MAILBOX_DATA));
+ writel(MAILBOX_RUN_BUSY | MAILBOX_BIOS_CMD_FSM_MEASURE_INTVL,
+ MCHBAR_REG(BIOS_MAILBOX_INTERFACE));
+
+ ret = pcode_ready();
+ if (ret)
+ return ret;
+
+ err_code = readl(MCHBAR_REG(BIOS_MAILBOX_INTERFACE)) & 0xff;
+
+ debug("PCODE: 24MHz BLCK calibration response: %d\n", err_code);
+
+ /* Read the calibrated value */
+ writel(MAILBOX_RUN_BUSY | MAILBOX_BIOS_CMD_READ_CALIBRATION,
+ MCHBAR_REG(BIOS_MAILBOX_INTERFACE));
+
+ ret = pcode_ready();
+ if (ret)
+ return ret;
+
+ debug("PCODE: 24MHz BLCK calibration value: 0x%08x\n",
+ readl(MCHBAR_REG(BIOS_MAILBOX_DATA)));
+
+ return 0;
+}
+
+static void configure_pch_power_sharing(void)
+{
+ u32 pch_power, pch_power_ext, pmsync, pmsync2;
+ int i;
+
+ /* Read PCH Power levels from PCODE */
+ pch_power = pcode_mailbox_read(MAILBOX_BIOS_CMD_READ_PCH_POWER);
+ pch_power_ext = pcode_mailbox_read(MAILBOX_BIOS_CMD_READ_PCH_POWER_EXT);
+
+ debug("PCH Power: PCODE Levels 0x%08x 0x%08x\n", pch_power,
+ pch_power_ext);
+
+ pmsync = readl(RCB_REG(PMSYNC_CONFIG));
+ pmsync2 = readl(RCB_REG(PMSYNC_CONFIG2));
+
+ /*
+ * Program PMSYNC_TPR_CONFIG PCH power limit values
+ * pmsync[0:4] = mailbox[0:5]
+ * pmsync[8:12] = mailbox[6:11]
+ * pmsync[16:20] = mailbox[12:17]
+ */
+ for (i = 0; i < 3; i++) {
+ u32 level = pch_power & 0x3f;
+ pch_power >>= 6;
+ pmsync &= ~(0x1f << (i * 8));
+ pmsync |= (level & 0x1f) << (i * 8);
+ }
+ writel(pmsync, RCB_REG(PMSYNC_CONFIG));
+
+ /*
+ * Program PMSYNC_TPR_CONFIG2 Extended PCH power limit values
+ * pmsync2[0:4] = mailbox[23:18]
+ * pmsync2[8:12] = mailbox_ext[6:11]
+ * pmsync2[16:20] = mailbox_ext[12:17]
+ * pmsync2[24:28] = mailbox_ext[18:22]
+ */
+ pmsync2 &= ~0x1f;
+ pmsync2 |= pch_power & 0x1f;
+
+ for (i = 1; i < 4; i++) {
+ u32 level = pch_power_ext & 0x3f;
+ pch_power_ext >>= 6;
+ pmsync2 &= ~(0x1f << (i * 8));
+ pmsync2 |= (level & 0x1f) << (i * 8);
+ }
+ writel(pmsync2, RCB_REG(PMSYNC_CONFIG2));
+}
+
+static int bsp_init_before_ap_bringup(struct udevice *dev)
+{
+ int ret;
+
+ initialize_vr_config(dev);
+ ret = calibrate_24mhz_bclk();
+ if (ret)
+ return ret;
+ configure_pch_power_sharing();
+
+ return 0;
+}
+
+int cpu_config_tdp_levels(void)
+{
+ msr_t platform_info;
+
+ /* Bits 34:33 indicate how many levels supported */
+ platform_info = msr_read(MSR_PLATFORM_INFO);
+ return (platform_info.hi >> 1) & 3;
+}
+
+static void set_max_ratio(void)
+{
+ msr_t msr, perf_ctl;
+
+ perf_ctl.hi = 0;
+
+ /* Check for configurable TDP option */
+ if (turbo_get_state() == TURBO_ENABLED) {
+ msr = msr_read(MSR_NHM_TURBO_RATIO_LIMIT);
+ perf_ctl.lo = (msr.lo & 0xff) << 8;
+ } else if (cpu_config_tdp_levels()) {
+ /* Set to nominal TDP ratio */
+ msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
+ perf_ctl.lo = (msr.lo & 0xff) << 8;
+ } else {
+ /* Platform Info bits 15:8 give max ratio */
+ msr = msr_read(MSR_PLATFORM_INFO);
+ perf_ctl.lo = msr.lo & 0xff00;
+ }
+ msr_write(IA32_PERF_CTL, perf_ctl);
+
+ debug("cpu: frequency set to %d\n",
+ ((perf_ctl.lo >> 8) & 0xff) * CPU_BCLK);
+}
+
+int broadwell_init(struct udevice *dev)
+{
+ struct cpu_broadwell_priv *priv = dev_get_priv(dev);
+ int num_threads;
+ int num_cores;
+ msr_t msr;
+ int ret;
+
+ msr = msr_read(CORE_THREAD_COUNT_MSR);
+ num_threads = (msr.lo >> 0) & 0xffff;
+ num_cores = (msr.lo >> 16) & 0xffff;
+ debug("CPU has %u cores, %u threads enabled\n", num_cores,
+ num_threads);
+
+ priv->ht_disabled = num_threads == num_cores;
+
+ ret = bsp_init_before_ap_bringup(dev);
+ if (ret)
+ return ret;
+
+ set_max_ratio();
+
+ return ret;
+}
+
+static void configure_mca(void)
+{
+ msr_t msr;
+ const unsigned int mcg_cap_msr = 0x179;
+ int i;
+ int num_banks;
+
+ msr = msr_read(mcg_cap_msr);
+ num_banks = msr.lo & 0xff;
+ msr.lo = 0;
+ msr.hi = 0;
+ /*
+ * TODO(adurbin): This should only be done on a cold boot. Also, some
+ * of these banks are core vs package scope. For now every CPU clears
+ * every bank
+ */
+ for (i = 0; i < num_banks; i++)
+ msr_write(MSR_IA32_MC0_STATUS + (i * 4), msr);
+}
+
+static void enable_lapic_tpr(void)
+{
+ msr_t msr;
+
+ msr = msr_read(MSR_PIC_MSG_CONTROL);
+ msr.lo &= ~(1 << 10); /* Enable APIC TPR updates */
+ msr_write(MSR_PIC_MSG_CONTROL, msr);
+}
+
+
+static void configure_c_states(void)
+{
+ msr_t msr;
+
+ msr = msr_read(MSR_PMG_CST_CONFIG_CONTROL);
+ msr.lo |= (1 << 31); /* Timed MWAIT Enable */
+ msr.lo |= (1 << 30); /* Package c-state Undemotion Enable */
+ msr.lo |= (1 << 29); /* Package c-state Demotion Enable */
+ 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 */
+ /* The deepest package c-state defaults to factory-configured value */
+ msr_write(MSR_PMG_CST_CONFIG_CONTROL, msr);
+
+ msr = msr_read(MSR_MISC_PWR_MGMT);
+ msr.lo &= ~(1 << 0); /* Enable P-state HW_ALL coordination */
+ msr_write(MSR_MISC_PWR_MGMT, msr);
+
+ msr = msr_read(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# */
+ msr_write(MSR_POWER_CTL, msr);
+
+ /* C-state Interrupt Response Latency Control 0 - package C3 latency */
+ msr.hi = 0;
+ msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_0_LIMIT;
+ msr_write(MSR_C_STATE_LATENCY_CONTROL_0, msr);
+
+ /* C-state Interrupt Response Latency Control 1 */
+ msr.hi = 0;
+ msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_1_LIMIT;
+ msr_write(MSR_C_STATE_LATENCY_CONTROL_1, msr);
+
+ /* C-state Interrupt Response Latency Control 2 - package C6/C7 short */
+ msr.hi = 0;
+ msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_2_LIMIT;
+ msr_write(MSR_C_STATE_LATENCY_CONTROL_2, msr);
+
+ /* C-state Interrupt Response Latency Control 3 - package C8 */
+ msr.hi = 0;
+ msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_3_LIMIT;
+ msr_write(MSR_C_STATE_LATENCY_CONTROL_3, msr);
+
+ /* C-state Interrupt Response Latency Control 4 - package C9 */
+ msr.hi = 0;
+ msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_4_LIMIT;
+ msr_write(MSR_C_STATE_LATENCY_CONTROL_4, msr);
+
+ /* C-state Interrupt Response Latency Control 5 - package C10 */
+ msr.hi = 0;
+ msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_5_LIMIT;
+ msr_write(MSR_C_STATE_LATENCY_CONTROL_5, msr);
+}
+
+static void configure_misc(void)
+{
+ msr_t msr;
+
+ msr = msr_read(MSR_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 */
+ msr_write(MSR_IA32_MISC_ENABLE, msr);
+
+ /* Disable thermal interrupts */
+ msr.lo = 0;
+ msr.hi = 0;
+ msr_write(MSR_IA32_THERM_INTERRUPT, msr);
+
+ /* Enable package critical interrupt only */
+ msr.lo = 1 << 4;
+ msr.hi = 0;
+ msr_write(MSR_IA32_PACKAGE_THERM_INTERRUPT, msr);
+}
+
+static void configure_thermal_target(struct udevice *dev)
+{
+ int tcc_offset;
+ msr_t msr;
+
+ tcc_offset = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+ "intel,tcc-offset", 0);
+
+ /* Set TCC activaiton offset if supported */
+ msr = msr_read(MSR_PLATFORM_INFO);
+ if ((msr.lo & (1 << 30)) && tcc_offset) {
+ msr = msr_read(MSR_TEMPERATURE_TARGET);
+ msr.lo &= ~(0xf << 24); /* Bits 27:24 */
+ msr.lo |= (tcc_offset & 0xf) << 24;
+ msr_write(MSR_TEMPERATURE_TARGET, 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 = msr_read(MSR_IA32_PLATFORM_DCA_CAP);
+ msr.lo |= 1;
+ msr_write(MSR_IA32_PLATFORM_DCA_CAP, msr);
+ }
+}
+
+static void set_energy_perf_bias(u8 policy)
+{
+ msr_t msr;
+ int ecx;
+
+ /* Determine if energy efficient policy is supported */
+ ecx = cpuid_ecx(0x6);
+ if (!(ecx & (1 << 3)))
+ return;
+
+ /* Energy Policy is bits 3:0 */
+ msr = msr_read(MSR_IA32_ENERGY_PERFORMANCE_BIAS);
+ msr.lo &= ~0xf;
+ msr.lo |= policy & 0xf;
+ msr_write(MSR_IA32_ENERGY_PERFORMANCE_BIAS, msr);
+
+ debug("cpu: energy policy set to %u\n", policy);
+}
+
+/* All CPUs including BSP will run the following function */
+static void cpu_core_init(struct udevice *dev)
+{
+ /* Clear out pending MCEs */
+ configure_mca();
+
+ /* Enable the local cpu apics */
+ enable_lapic_tpr();
+
+ /* Configure C States */
+ configure_c_states();
+
+ /* Configure Enhanced SpeedStep and Thermal Sensors */
+ configure_misc();
+
+ /* Thermal throttle activation offset */
+ configure_thermal_target(dev);
+
+ /* Enable Direct Cache Access */
+ configure_dca_cap();
+
+ /* Set energy policy */
+ set_energy_perf_bias(ENERGY_POLICY_NORMAL);
+
+ /* Enable Turbo */
+ turbo_enable();
+}
+
+/*
+ * Configure processor power limits if possible
+ * This must be done AFTER set of BIOS_RESET_CPL
+ */
+void cpu_set_power_limits(int power_limit_1_time)
+{
+ msr_t msr;
+ msr_t limit;
+ unsigned power_unit;
+ unsigned tdp, min_power, max_power, max_time;
+ u8 power_limit_1_val;
+
+ msr = msr_read(MSR_PLATFORM_INFO);
+ if (power_limit_1_time > ARRAY_SIZE(power_limit_time_sec_to_msr))
+ power_limit_1_time = 28;
+
+ if (!(msr.lo & PLATFORM_INFO_SET_TDP))
+ return;
+
+ /* Get units */
+ msr = msr_read(MSR_PKG_POWER_SKU_UNIT);
+ power_unit = 2 << ((msr.lo & 0xf) - 1);
+
+ /* Get power defaults for this SKU */
+ msr = msr_read(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;
+
+ 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 server SKU */
+
+ msr_write(MSR_PKG_POWER_LIMIT, limit);
+
+ /* Set power limit values in MCHBAR as well */
+ writel(limit.lo, MCHBAR_REG(MCH_PKG_POWER_LIMIT_LO));
+ writel(limit.hi, MCHBAR_REG(MCH_PKG_POWER_LIMIT_HI));
+
+ /* Set DDR RAPL power limit by copying from MMIO to MSR */
+ msr.lo = readl(MCHBAR_REG(MCH_DDR_POWER_LIMIT_LO));
+ msr.hi = readl(MCHBAR_REG(MCH_DDR_POWER_LIMIT_HI));
+ msr_write(MSR_DDR_RAPL_LIMIT, msr);
+
+ /* Use nominal TDP values for CPUs with configurable TDP */
+ if (cpu_config_tdp_levels()) {
+ msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
+ limit.hi = 0;
+ limit.lo = msr.lo & 0xff;
+ msr_write(MSR_TURBO_ACTIVATION_RATIO, limit);
+ }
+}
+
+static int broadwell_get_info(struct udevice *dev, struct cpu_info *info)
+{
+ msr_t msr;
+
+ msr = msr_read(IA32_PERF_CTL);
+ info->cpu_freq = ((msr.lo >> 8) & 0xff) * BROADWELL_BCLK * 1000000;
+ info->features = 1 << CPU_FEAT_L1_CACHE | 1 << CPU_FEAT_MMU |
+ 1 << CPU_FEAT_UCODE | 1 << CPU_FEAT_DEVICE_ID;
+
+ return 0;
+}
+
+static int broadwell_get_count(struct udevice *dev)
+{
+ return 4;
+}
+
+static int cpu_x86_broadwell_probe(struct udevice *dev)
+{
+ if (dev->seq == 0) {
+ cpu_core_init(dev);
+ return broadwell_init(dev);
+ }
+
+ return 0;
+}
+
+static const struct cpu_ops cpu_x86_broadwell_ops = {
+ .get_desc = cpu_x86_get_desc,
+ .get_info = broadwell_get_info,
+ .get_count = broadwell_get_count,
+};
+
+static const struct udevice_id cpu_x86_broadwell_ids[] = {
+ { .compatible = "intel,core-i3-gen5" },
+ { }
+};
+
+U_BOOT_DRIVER(cpu_x86_broadwell_drv) = {
+ .name = "cpu_x86_broadwell",
+ .id = UCLASS_CPU,
+ .of_match = cpu_x86_broadwell_ids,
+ .bind = cpu_x86_bind,
+ .probe = cpu_x86_broadwell_probe,
+ .ops = &cpu_x86_broadwell_ops,
+ .priv_auto_alloc_size = sizeof(struct cpu_broadwell_priv),
+};
--- /dev/null
+/*
+ * From coreboot soc/intel/broadwell/include/soc/me.h
+ *
+ * Copyright (C) 2014 Google Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef _asm_arch_me_h
+#define _asm_arch_me_h
+
+#include <asm/me_common.h>
+
+#define ME_INIT_STATUS_SUCCESS_OTHER 3 /* SEE ME9 BWG */
+
+#define ME_HSIO_MESSAGE (7 << 28)
+#define ME_HSIO_CMD_GETHSIOVER 1
+#define ME_HSIO_CMD_CLOSE 0
+
+/*
+ * Apparently the GMES register is renamed to HFS2 (or HFSTS2 according
+ * to ME9 BWG). Sadly the PCH EDS and the ME BWG do not match on nomenclature.
+ */
+#define PCI_ME_HFS2 0x48
+/* Infrastructure Progress Values */
+#define ME_HFS2_PHASE_ROM 0
+#define ME_HFS2_PHASE_BUP 1
+#define ME_HFS2_PHASE_UKERNEL 2
+#define ME_HFS2_PHASE_POLICY 3
+#define ME_HFS2_PHASE_MODULE_LOAD 4
+#define ME_HFS2_PHASE_UNKNOWN 5
+#define ME_HFS2_PHASE_HOST_COMM 6
+/* Current State - Based on Infra Progress values. */
+/* ROM State */
+#define ME_HFS2_STATE_ROM_BEGIN 0
+#define ME_HFS2_STATE_ROM_DISABLE 6
+/* BUP State */
+#define ME_HFS2_STATE_BUP_INIT 0
+#define ME_HFS2_STATE_BUP_DIS_HOST_WAKE 1
+#define ME_HFS2_STATE_BUP_FLOW_DET 4
+#define ME_HFS2_STATE_BUP_VSCC_ERR 8
+#define ME_HFS2_STATE_BUP_CHECK_STRAP 0xa
+#define ME_HFS2_STATE_BUP_PWR_OK_TIMEOUT 0xb
+#define ME_HFS2_STATE_BUP_MANUF_OVRD_STRAP 0xd
+#define ME_HFS2_STATE_BUP_M3 0x11
+#define ME_HFS2_STATE_BUP_M0 0x12
+#define ME_HFS2_STATE_BUP_FLOW_DET_ERR 0x13
+#define ME_HFS2_STATE_BUP_M3_CLK_ERR 0x15
+#define ME_HFS2_STATE_BUP_CPU_RESET_DID_TIMEOUT_MEM_MISSING 0x17
+#define ME_HFS2_STATE_BUP_M3_KERN_LOAD 0x18
+#define ME_HFS2_STATE_BUP_T32_MISSING 0x1c
+#define ME_HFS2_STATE_BUP_WAIT_DID 0x1f
+#define ME_HFS2_STATE_BUP_WAIT_DID_FAIL 0x20
+#define ME_HFS2_STATE_BUP_DID_NO_FAIL 0x21
+#define ME_HFS2_STATE_BUP_ENABLE_UMA 0x22
+#define ME_HFS2_STATE_BUP_ENABLE_UMA_ERR 0x23
+#define ME_HFS2_STATE_BUP_SEND_DID_ACK 0x24
+#define ME_HFS2_STATE_BUP_SEND_DID_ACK_ERR 0x25
+#define ME_HFS2_STATE_BUP_M0_CLK 0x26
+#define ME_HFS2_STATE_BUP_M0_CLK_ERR 0x27
+#define ME_HFS2_STATE_BUP_TEMP_DIS 0x28
+#define ME_HFS2_STATE_BUP_M0_KERN_LOAD 0x32
+/* Policy Module State */
+#define ME_HFS2_STATE_POLICY_ENTRY 0
+#define ME_HFS2_STATE_POLICY_RCVD_S3 3
+#define ME_HFS2_STATE_POLICY_RCVD_S4 4
+#define ME_HFS2_STATE_POLICY_RCVD_S5 5
+#define ME_HFS2_STATE_POLICY_RCVD_UPD 6
+#define ME_HFS2_STATE_POLICY_RCVD_PCR 7
+#define ME_HFS2_STATE_POLICY_RCVD_NPCR 8
+#define ME_HFS2_STATE_POLICY_RCVD_HOST_WAKE 9
+#define ME_HFS2_STATE_POLICY_RCVD_AC_DC 0xa
+#define ME_HFS2_STATE_POLICY_RCVD_DID 0xb
+#define ME_HFS2_STATE_POLICY_VSCC_NOT_FOUND 0xc
+#define ME_HFS2_STATE_POLICY_VSCC_INVALID 0xd
+#define ME_HFS2_STATE_POLICY_FPB_ERR 0xe
+#define ME_HFS2_STATE_POLICY_DESCRIPTOR_ERR 0xf
+#define ME_HFS2_STATE_POLICY_VSCC_NO_MATCH 0x10
+/* Current PM Event Values */
+#define ME_HFS2_PMEVENT_CLEAN_MOFF_MX_WAKE 0
+#define ME_HFS2_PMEVENT_MOFF_MX_WAKE_ERROR 1
+#define ME_HFS2_PMEVENT_CLEAN_GLOBAL_RESET 2
+#define ME_HFS2_PMEVENT_CLEAN_GLOBAL_RESET_ERROR 3
+#define ME_HFS2_PMEVENT_CLEAN_ME_RESET 4
+#define ME_HFS2_PMEVENT_ME_RESET_EXCEPTION 5
+#define ME_HFS2_PMEVENT_PSEUDO_ME_RESET 6
+#define ME_HFS2_PMEVENT_S0MO_SXM3 7
+#define ME_HFS2_PMEVENT_SXM3_S0M0 8
+#define ME_HFS2_PMEVENT_NON_PWR_CYCLE_RESET 9
+#define ME_HFS2_PMEVENT_PWR_CYCLE_RESET_M3 0xa
+#define ME_HFS2_PMEVENT_PWR_CYCLE_RESET_MOFF 0xb
+#define ME_HFS2_PMEVENT_SXMX_SXMOFF 0xc
+
+struct me_hfs2 {
+ u32 bist_in_progress:1;
+ u32 reserved1:2;
+ u32 invoke_mebx:1;
+ u32 cpu_replaced_sts:1;
+ u32 mbp_rdy:1;
+ u32 mfs_failure:1;
+ u32 warm_reset_request:1;
+ u32 cpu_replaced_valid:1;
+ u32 reserved2:4;
+ u32 mbp_cleared:1;
+ u32 reserved3:2;
+ u32 current_state:8;
+ u32 current_pmevent:4;
+ u32 progress_code:4;
+} __packed;
+
+#define PCI_ME_HFS5 0x68
+
+#define PCI_ME_H_GS2 0x70
+#define PCI_ME_MBP_GIVE_UP 0x01
+
+/* ICC Messages */
+#define ICC_SET_CLOCK_ENABLES 0x3
+#define ICC_API_VERSION_LYNXPOINT 0x00030000
+
+struct icc_header {
+ u32 api_version;
+ u32 icc_command;
+ u32 icc_status;
+ u32 length;
+ u32 reserved;
+} __packed;
+
+struct icc_clock_enables_msg {
+ u32 clock_enables;
+ u32 clock_mask;
+ u32 no_response:1;
+ u32 reserved:31;
+} __packed;
+
+/*
+ * ME to BIOS Payload Datastructures and definitions. The ordering of the
+ * structures follows the ordering in the ME9 BWG.
+ */
+
+#define MBP_APPID_KERNEL 1
+#define MBP_APPID_INTEL_AT 3
+#define MBP_APPID_HWA 4
+#define MBP_APPID_ICC 5
+#define MBP_APPID_NFC 6
+/* Kernel items: */
+#define MBP_KERNEL_FW_VER_ITEM 1
+#define MBP_KERNEL_FW_CAP_ITEM 2
+#define MBP_KERNEL_ROM_BIST_ITEM 3
+#define MBP_KERNEL_PLAT_KEY_ITEM 4
+#define MBP_KERNEL_FW_TYPE_ITEM 5
+#define MBP_KERNEL_MFS_FAILURE_ITEM 6
+#define MBP_KERNEL_PLAT_TIME_ITEM 7
+/* Intel AT items: */
+#define MBP_INTEL_AT_STATE_ITEM 1
+/* ICC Items: */
+#define MBP_ICC_PROFILE_ITEM 1
+/* HWA Items: */
+#define MBP_HWA_REQUEST_ITEM 1
+/* NFC Items: */
+#define MBP_NFC_SUPPORT_DATA_ITEM 1
+
+#define MBP_MAKE_IDENT(appid, item) ((appid << 8) | item)
+#define MBP_IDENT(appid, item) \
+ MBP_MAKE_IDENT(MBP_APPID_##appid, MBP_##appid##_##item##_ITEM)
+
+struct mbp_fw_version_name {
+ u32 major_version:16;
+ u32 minor_version:16;
+ u32 hotfix_version:16;
+ u32 build_version:16;
+} __packed;
+
+struct icc_address_mask {
+ u16 icc_start_address;
+ u16 mask;
+} __packed;
+
+struct mbp_icc_profile {
+ u8 num_icc_profiles;
+ u8 icc_profile_soft_strap;
+ u8 icc_profile_index;
+ u8 reserved;
+ u32 icc_reg_bundles;
+ struct icc_address_mask icc_address_mask[0];
+} __packed;
+
+struct me_bios_payload {
+ struct mbp_fw_version_name *fw_version_name;
+ struct mbp_mefwcaps *fw_capabilities;
+ struct mbp_rom_bist_data *rom_bist_data;
+ struct mbp_platform_key *platform_key;
+ struct mbp_plat_type *fw_plat_type;
+ struct mbp_icc_profile *icc_profile;
+ struct mbp_at_state *at_state;
+ u32 *mfsintegrity;
+ struct mbp_plat_time *plat_time;
+ struct mbp_nfc_data *nfc_data;
+};
+
+#endif
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