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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Google Inc.
* Copyright (C) 2015-2018 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 <arch/io.h>
#include <device/mmio.h>
#include <device/pci_ops.h>
#include <bootstate.h>
#include <console/console.h>
#include <console/post_codes.h>
#include <cpu/x86/mp.h>
#include <cpu/x86/smm.h>
#include <device/pci.h>
#include <intelblocks/cpulib.h>
#include <intelblocks/lpc_lib.h>
#include <intelblocks/p2sb.h>
#include <intelblocks/pcr.h>
#include <intelblocks/tco.h>
#include <intelblocks/thermal.h>
#include <reg_script.h>
#include <spi-generic.h>
#include <soc/me.h>
#include <soc/p2sb.h>
#include <soc/pci_devs.h>
#include <soc/pcr_ids.h>
#include <soc/pm.h>
#include <soc/smbus.h>
#include <soc/systemagent.h>
#include <stdlib.h>
#include <timer.h>
#include "chip.h"
#define PSF_BASE_ADDRESS 0xA00
#define PCR_PSFX_T0_SHDW_PCIEN 0x1C
#define PCR_PSFX_T0_SHDW_PCIEN_FUNDIS (1 << 8)
static void pch_disable_heci(void)
{
/* unhide p2sb device */
p2sb_unhide();
/* disable heci */
pcr_or32(PID_PSF1, PSF_BASE_ADDRESS + PCR_PSFX_T0_SHDW_PCIEN,
PCR_PSFX_T0_SHDW_PCIEN_FUNDIS);
p2sb_disable_sideband_access();
}
static void pch_finalize_script(struct device *dev)
{
uint32_t reg32;
uint8_t *pmcbase;
config_t *config;
u8 reg8;
tco_lockdown();
/* Display me status before we hide it */
intel_me_status();
pmcbase = pmc_mmio_regs();
config = config_of(dev);
/*
* Set low maximum temp value used for dynamic thermal sensor
* shutdown consideration.
*
* If Dynamic Thermal Shutdown is enabled then PMC logic shuts down the
* thermal sensor when CPU is in a C-state and DTS Temp <= LTT.
*/
pch_thermal_configuration();
/*
* Disable ACPI PM timer based on dt policy
*
* Disabling ACPI PM timer is necessary for XTAL OSC shutdown.
* Disabling ACPI PM timer also switches off TCO
*/
if (config->PmTimerDisabled) {
reg8 = read8(pmcbase + PCH_PWRM_ACPI_TMR_CTL);
reg8 |= (1 << 1);
write8(pmcbase + PCH_PWRM_ACPI_TMR_CTL, reg8);
}
/* Disable XTAL shutdown qualification for low power idle. */
if (config->s0ix_enable) {
reg32 = read32(pmcbase + CIR31C);
reg32 |= XTALSDQDIS;
write32(pmcbase + CIR31C, reg32);
}
/* we should disable Heci1 based on the devicetree policy */
if (config->HeciEnabled == 0)
pch_disable_heci();
/* Hide p2sb device as the OS must not change BAR0. */
p2sb_hide();
}
static void soc_lockdown(struct device *dev)
{
struct soc_intel_skylake_config *config;
u8 reg8;
config = config_of(dev);
/* Global SMI Lock */
if (config->LockDownConfigGlobalSmi == 0) {
reg8 = pci_read_config8(dev, GEN_PMCON_A);
reg8 |= SMI_LOCK;
pci_write_config8(dev, GEN_PMCON_A, reg8);
}
/* Lock chipset memory registers to protect SMM */
mp_run_on_all_cpus(cpu_lt_lock_memory, NULL);
}
static void soc_finalize(void *unused)
{
struct device *dev;
dev = PCH_DEV_PMC;
/* Check if PMC is enabled, else return */
if (dev == NULL)
return;
printk(BIOS_DEBUG, "Finalizing chipset.\n");
pch_finalize_script(dev);
soc_lockdown(dev);
printk(BIOS_DEBUG, "Finalizing SMM.\n");
outb(APM_CNT_FINALIZE, APM_CNT);
/* Indicate finalize step with post code */
post_code(POST_OS_BOOT);
}
BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, soc_finalize, NULL);
BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, soc_finalize, NULL);
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