soc/intel/cannonlake: Add cpu.c and MP init support

Add initial MP init support. This boots up all CPUs.

Change-Id: Ia33691c17c663d704abf65320d4bf1262239524d
Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/21081
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 256 insertions, 0 deletions

diff --git a/src/soc/intel/cannonlake/cpu.c b/src/soc/intel/cannonlake/cpu.c
new file mode 100644
index 0000000000..ec979f0cd4
--- /dev/null
+++ b/src/soc/intel/cannonlake/cpu.c
@@ -0,0 +1,256 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Intel Corporation.
+ *
+ * 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.
+ */
+
+#include <console/console.h>
+#include <device/pci.h>
+#include <chip.h>
+#include <cpu/x86/lapic.h>
+#include <cpu/x86/mp.h>
+#include <cpu/intel/turbo.h>
+#include <intelblocks/cpulib.h>
+#include <intelblocks/mp_init.h>
+#include <romstage_handoff.h>
+#include <soc/cpu.h>
+#include <soc/msr.h>
+#include <soc/pci_devs.h>
+
+static void soc_fsp_load(void)
+{
+	fsps_load(romstage_handoff_is_resume());
+}
+
+static void configure_isst(void)
+{
+	device_t dev = SA_DEV_ROOT;
+	config_t *conf = dev->chip_info;
+	msr_t msr;
+
+	if (conf->speed_shift_enable) {
+		/*
+		 * Kernel driver checks CPUID.06h:EAX[Bit 7] to determine if HWP
+		 * is supported or not. coreboot needs to configure MSR 0x1AA
+		 * which is then reflected in the CPUID register.
+		 */
+		msr = rdmsr(MSR_MISC_PWR_MGMT);
+		msr.lo |= MISC_PWR_MGMT_ISST_EN; /* Enable Speed Shift */
+		msr.lo |= MISC_PWR_MGMT_ISST_EN_INT; /* Enable Interrupt */
+		msr.lo |= MISC_PWR_MGMT_ISST_EN_EPP; /* Enable EPP */
+		wrmsr(MSR_MISC_PWR_MGMT, msr);
+	} else {
+		msr = rdmsr(MSR_MISC_PWR_MGMT);
+		msr.lo &= ~MISC_PWR_MGMT_ISST_EN; /* Disable Speed Shift */
+		msr.lo &= ~MISC_PWR_MGMT_ISST_EN_INT; /* Disable Interrupt */
+		msr.lo &= ~MISC_PWR_MGMT_ISST_EN_EPP; /* Disable EPP */
+		wrmsr(MSR_MISC_PWR_MGMT, msr);
+	}
+}
+
+static void configure_misc(void)
+{
+	device_t dev = SA_DEV_ROOT;
+	config_t *conf = dev->chip_info;
+	msr_t msr;
+
+	msr = rdmsr(IA32_MISC_ENABLE);
+	msr.lo |= (1 << 0);	/* Fast String enable */
+	msr.lo |= (1 << 3);	/* TM1/TM2/EMTTM enable */
+	if (conf->eist_enable)
+		cpu_enable_eist();
+	else
+		cpu_disable_eist();
+	wrmsr(IA32_MISC_ENABLE, msr);
+
+	/* Disable Thermal interrupts */
+	msr.lo = 0;
+	msr.hi = 0;
+	wrmsr(IA32_THERM_INTERRUPT, msr);
+
+	/* Enable package critical interrupt only */
+	msr.lo = 1 << 4;
+	msr.hi = 0;
+	wrmsr(IA32_PACKAGE_THERM_INTERRUPT, msr);
+
+	/* Enable PROCHOT */
+	msr = rdmsr(MSR_POWER_CTL);
+	msr.lo |= (1 << 0);	/* Enable Bi-directional PROCHOT as an input*/
+	msr.lo |= (1 << 23);	/* Lock it */
+	wrmsr(MSR_POWER_CTL, msr);
+}
+
+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 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 = rdmsr(IA32_PLATFORM_DCA_CAP);
+		msr.lo |= 1;
+		wrmsr(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 = rdmsr(IA32_ENERGY_PERFORMANCE_BIAS);
+	msr.lo &= ~0xf;
+	msr.lo |= policy & 0xf;
+	wrmsr(IA32_ENERGY_PERFORMANCE_BIAS, msr);
+}
+
+static void configure_mca(void)
+{
+	msr_t msr;
+	int i;
+	int num_banks;
+
+	msr = rdmsr(IA32_MCG_CAP);
+	num_banks = msr.lo & 0xff;
+	msr.lo = 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++) {
+		/* Clear the machine check status */
+		wrmsr(IA32_MC0_STATUS + (i * 4), msr);
+		/* Initialize machine checks */
+		wrmsr(IA32_MC0_CTL + i * 4,
+			(msr_t) {.lo = 0xffffffff, .hi = 0xffffffff});
+	}
+}
+
+static void configure_c_states(void)
+{
+	msr_t 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;
+	wrmsr(MSR_C_STATE_LATENCY_CONTROL_0, msr);
+
+	/* C-state Interrupt Response Latency Control 1 - package C6/C7 short */
+	msr.hi = 0;
+	msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_1_LIMIT;
+	wrmsr(MSR_C_STATE_LATENCY_CONTROL_1, msr);
+
+	/* C-state Interrupt Response Latency Control 2 - package C6/C7 long */
+	msr.hi = 0;
+	msr.lo = IRTL_VALID | IRTL_1024_NS | C_STATE_LATENCY_CONTROL_2_LIMIT;
+	wrmsr(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;
+	wrmsr(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;
+	wrmsr(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;
+	wrmsr(MSR_C_STATE_LATENCY_CONTROL_5, msr);
+}
+
+/* All CPUs including BSP will run the following function. */
+void soc_core_init(device_t cpu)
+{
+	/* Clear out pending MCEs */
+	configure_mca();
+
+	/* Enable the local CPU apics */
+	enable_lapic_tpr();
+	setup_lapic();
+
+	/* Configure c-state interrupt response time */
+	configure_c_states();
+
+	/* Configure Enhanced SpeedStep and Thermal Sensors */
+	configure_misc();
+
+	/* Configure Intel Speed Shift */
+	configure_isst();
+
+	/* Enable Direct Cache Access */
+	configure_dca_cap();
+
+	/* Set energy policy */
+	set_energy_perf_bias(ENERGY_POLICY_NORMAL);
+
+	/* Enable Turbo */
+	enable_turbo();
+
+}
+
+static int adjust_apic_id(int index, int apic_id)
+{
+	unsigned int num_cores, num_threads;
+
+	if (cpu_read_topology(&num_cores, &num_threads))
+		return 2 * index;
+	else
+		return index;
+}
+
+static void post_mp_init(void)
+{
+	/* Set Max Ratio */
+	cpu_set_max_ratio();
+}
+
+static const struct mp_ops mp_ops = {
+	/*
+	 * Skip Pre MP init MTRR programming as MTRRs are mirrored from BSP,
+	 * that are set prior to ramstage.
+	 * Real MTRRs programming are being done after resource allocation.
+	 */
+	.pre_mp_init = soc_fsp_load,
+	.get_cpu_count = get_cpu_count,
+	.get_microcode_info = get_microcode_info,
+	.adjust_cpu_apic_entry = adjust_apic_id,
+	.post_mp_init = post_mp_init,
+};
+
+void soc_init_cpus(struct bus *cpu_bus)
+{
+	if (mp_init_with_smm(cpu_bus, &mp_ops))
+		printk(BIOS_ERR, "MP initialization failure.\n");
+}