coreboot-kgpe-d16/src/soc/intel/apollolake/cpu.c

244 lines
7 KiB
C
Raw Normal View History

/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015-2016 Intel Corp.
* (Written by Andrey Petrov <andrey.petrov@intel.com> for Intel Corp.)
* (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for Intel Corp.)
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 <cpu/cpu.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/mp.h>
#include <cpu/intel/microcode.h>
#include <cpu/intel/turbo.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/mtrr.h>
#include <device/device.h>
#include <device/pci.h>
#include <fsp/api.h>
#include <fsp/memmap.h>
#include <intelblocks/cpulib.h>
#include <intelblocks/fast_spi.h>
#include <intelblocks/mp_init.h>
#include <intelblocks/msr.h>
#include <intelblocks/smm.h>
#include <reg_script.h>
#include <romstage_handoff.h>
#include <soc/cpu.h>
#include <soc/iomap.h>
#include <soc/pm.h>
static const struct reg_script core_msr_script[] = {
/* Enable C-state and IO/MWAIT redirect */
REG_MSR_WRITE(MSR_PMG_CST_CONFIG_CONTROL,
(PKG_C_STATE_LIMIT_C2_MASK | CORE_C_STATE_LIMIT_C10_MASK
| IO_MWAIT_REDIRECT_MASK | CST_CFG_LOCK_MASK)),
/* Power Management I/O base address for I/O trapping to C-states */
REG_MSR_WRITE(MSR_PMG_IO_CAPTURE_BASE,
(ACPI_PMIO_CST_REG | (PMG_IO_BASE_CST_RNG_BLK_SIZE << 16))),
/* Disable C1E */
REG_MSR_RMW(MSR_POWER_CTL, ~0x2, 0),
/* Disable support for MONITOR and MWAIT instructions */
REG_MSR_RMW(MSR_IA32_MISC_ENABLES, ~MONITOR_MWAIT_DIS_MASK, 0),
/*
* Enable and Lock the Advanced Encryption Standard (AES-NI)
* feature register
*/
REG_MSR_RMW(MSR_FEATURE_CONFIG, ~FEATURE_CONFIG_RESERVED_MASK,
FEATURE_CONFIG_LOCK),
REG_SCRIPT_END
};
void soc_core_init(device_t cpu, const void *microcode)
{
/* Set core MSRs */
reg_script_run(core_msr_script);
/*
* Enable ACPI PM timer emulation, which also lets microcode know
* location of ACPI_BASE_ADDRESS. This also enables other features
* implemented in microcode.
*/
enable_pm_timer_emulation();
}
#if !IS_ENABLED(CONFIG_SOC_INTEL_COMMON_BLOCK_CPU_MPINIT)
static void soc_init_core(device_t cpu)
{
soc_core_init(cpu, NULL);
}
static struct device_operations cpu_dev_ops = {
.init = soc_init_core,
};
static struct cpu_device_id cpu_table[] = {
{ X86_VENDOR_INTEL, CPUID_APOLLOLAKE_A0 },
{ X86_VENDOR_INTEL, CPUID_APOLLOLAKE_B0 },
{ X86_VENDOR_INTEL, CPUID_GLK_A0 },
{ X86_VENDOR_INTEL, CPUID_GLK_B0 },
{ 0, 0 },
};
static const struct cpu_driver driver __cpu_driver = {
.ops = &cpu_dev_ops,
.id_table = cpu_table,
};
#endif
/*
* MP and SMM loading initialization.
*/
struct smm_relocation_attrs {
uint32_t smbase;
uint32_t smrr_base;
uint32_t smrr_mask;
};
static struct smm_relocation_attrs relo_attrs;
/*
* Do essential initialization tasks before APs can be fired up.
*
* IF (IS_ENABLED(CONFIG_SOC_INTEL_COMMON_BLOCK_CPU_MPINIT)) -
* Skip Pre MP init MTRR programming, as MTRRs are mirrored from BSP,
* that are set prior to ramstage.
* Real MTRRs are programmed after resource allocation.
*
* Do FSP loading before MP Init to ensure that the FSP component stored in
* external stage cache in TSEG does not flush off due to SMM relocation
* during MP Init stage.
*
* ELSE -
* Enable MTRRs on the BSP. This creates the MTRR solution that the
* APs will use. Otherwise APs will try to apply the incomplete solution
* as the BSP is calculating it.
*/
static void pre_mp_init(void)
{
if (IS_ENABLED(CONFIG_SOC_INTEL_COMMON_BLOCK_CPU_MPINIT)) {
fsps_load(romstage_handoff_is_resume());
return;
}
soc/intel/apollolake: revert CPU MP init prior to FSP-S A major regression was introduced with commit 6520e01a (soc/intel/apollolake: Perform CPU MP Init before FSP-S Init) where the APs execution context is taken away by FSP-S. It appears that FSP-S is not honoring the SkipMpInit UPD because it's been shown with some debug code that FSP-S is compeltely hijacking the APs: Chrome EC: Set WAKE mask to 0x00000000 Chrome EC: Set WAKE mask to 0x00000000 CBFS: 'VBOOT' located CBFS at [440000:524140) CBFS: Locating 'vbt.bin' CBFS: Found @ offset 2e700 size 1a00 Running FSPS in 4 secs.. 315875 4315875 cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work Running FSPS.. 4315875 4315875 ITSS IRQ Polarities Before: ITSS IRQ Polarities Before: IPC0: 0xffffeef8 IPC1: 0xffffffff IPC2: 0xffffffff IPC3: 0x00ffffff ITSS IRQ Polarities After: IPC0: 0xffffeef8 IPC1: 0x4a07ffff IPC2: 0x08000000 IPC3: 0x00a11000 This is essentially a revert of 6520e01a to fix the previous behavior. Change-Id: I2e136ea1757870fe69df532ba615b9bfc6dfc651 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/20215 Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Andrey Petrov <andrey.petrov@intel.com>
2017-06-14 20:21:00 +02:00
x86_setup_mtrrs_with_detect();
x86_mtrr_check();
}
#if !IS_ENABLED(CONFIG_SOC_INTEL_COMMON_BLOCK_CPU_MPINIT)
static void read_cpu_topology(unsigned int *num_phys, unsigned int *num_virt)
{
msr_t msr;
msr = rdmsr(MSR_CORE_THREAD_COUNT);
*num_virt = (msr.lo >> 0) & 0xffff;
*num_phys = (msr.lo >> 16) & 0xffff;
}
/* Find CPU topology */
int get_cpu_count(void)
{
unsigned int num_virt_cores, num_phys_cores;
read_cpu_topology(&num_phys_cores, &num_virt_cores);
printk(BIOS_DEBUG, "Detected %u core, %u thread CPU.\n",
num_phys_cores, num_virt_cores);
return num_virt_cores;
}
void get_microcode_info(const void **microcode, int *parallel)
{
*microcode = intel_microcode_find();
*parallel = 1;
/* Make sure BSP is using the microcode from cbfs */
intel_microcode_load_unlocked(*microcode);
}
#endif
static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize,
size_t *smm_save_state_size)
{
void *smm_base;
size_t smm_size;
void *handler_base;
size_t handler_size;
/* All range registers are aligned to 4KiB */
const uint32_t rmask = ~((1 << 12) - 1);
/* Initialize global tracking state. */
smm_region(&smm_base, &smm_size);
smm_subregion(SMM_SUBREGION_HANDLER, &handler_base, &handler_size);
relo_attrs.smbase = (uint32_t)smm_base;
relo_attrs.smrr_base = relo_attrs.smbase | MTRR_TYPE_WRBACK;
relo_attrs.smrr_mask = ~(smm_size - 1) & rmask;
relo_attrs.smrr_mask |= MTRR_PHYS_MASK_VALID;
*perm_smbase = (uintptr_t)handler_base;
*perm_smsize = handler_size;
*smm_save_state_size = sizeof(em64t100_smm_state_save_area_t);
}
static void relocation_handler(int cpu, uintptr_t curr_smbase,
uintptr_t staggered_smbase)
{
msr_t smrr;
em64t100_smm_state_save_area_t *smm_state;
/* Set up SMRR. */
smrr.lo = relo_attrs.smrr_base;
smrr.hi = 0;
wrmsr(SMRR_PHYS_BASE, smrr);
smrr.lo = relo_attrs.smrr_mask;
smrr.hi = 0;
wrmsr(SMRR_PHYS_MASK, smrr);
smm_state = (void *)(SMM_EM64T100_SAVE_STATE_OFFSET + curr_smbase);
smm_state->smbase = staggered_smbase;
}
/*
* CPU initialization recipe
*
* Note that no microcode update is passed to the init function. CSE updates
* the microcode on all cores before releasing them from reset. That means that
* the BSP and all APs will come up with the same microcode revision.
*/
static const struct mp_ops mp_ops = {
.pre_mp_init = pre_mp_init,
.get_cpu_count = get_cpu_count,
.get_smm_info = get_smm_info,
.get_microcode_info = get_microcode_info,
.pre_mp_smm_init = smm_southbridge_clear_state,
.relocation_handler = relocation_handler,
.post_mp_init = smm_southbridge_enable,
};
void soc_init_cpus(struct bus *cpu_bus, const void *microcode)
{
/* Clear for take-off */
if (mp_init_with_smm(cpu_bus, &mp_ops))
printk(BIOS_ERR, "MP initialization failure.\n");
}
void apollolake_init_cpus(struct device *dev)
{
if (IS_ENABLED(CONFIG_SOC_INTEL_COMMON_BLOCK_CPU_MPINIT))
return;
soc_init_cpus(dev->link_list, NULL);
/* Temporarily cache the memory-mapped boot media. */
if (IS_ENABLED(CONFIG_BOOT_DEVICE_MEMORY_MAPPED) &&
IS_ENABLED(CONFIG_BOOT_DEVICE_SPI_FLASH))
fast_spi_cache_bios_region();
}