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/* SPDX-License-Identifier: GPL-2.0-only */
#include <bootstate.h>
#include <console/console.h>
#include <console/debug.h>
#include <cpu/x86/mp.h>
#include <cpu/x86/smm.h>
#include <device/pci.h>
#include <intelpch/lockdown.h>
#include <soc/msr.h>
#include <soc/pci_devs.h>
#include <soc/pm.h>
#include <soc/util.h>
#include <smp/spinlock.h>
#include "chip.h"
static void lock_pam0123(void)
{
const struct device *dev;
if (get_lockdown_config() != CHIPSET_LOCKDOWN_COREBOOT)
return;
dev = pcidev_path_on_bus(get_stack_busno(1), PCI_DEVFN(SAD_ALL_DEV, SAD_ALL_FUNC));
pci_or_config32(dev, SAD_ALL_PAM0123_CSR, PAM_LOCK);
}
DECLARE_SPIN_LOCK(msr_ppin_lock);
static void lock_msr_ppin_ctl(void *unused)
{
msr_t msr;
msr = rdmsr(MSR_PLATFORM_INFO);
if ((msr.lo & MSR_PPIN_CAP) == 0)
return;
spin_lock(&msr_ppin_lock);
msr = rdmsr(MSR_PPIN_CTL);
if (msr.lo & MSR_PPIN_CTL_LOCK) {
spin_unlock(&msr_ppin_lock);
return;
}
/* Clear enable and lock it */
msr.lo &= ~MSR_PPIN_CTL_ENABLE;
msr.lo |= MSR_PPIN_CTL_LOCK;
wrmsr(MSR_PPIN_CTL, msr);
spin_unlock(&msr_ppin_lock);
}
static void soc_finalize(void *unused)
{
printk(BIOS_DEBUG, "Finalizing chipset.\n");
/*
* Disable ACPI PM timer based on Kconfig
*
* Disabling ACPI PM timer is necessary for XTAL OSC shutdown.
* Disabling ACPI PM timer also switches off TCO.
*
* Note: In contrast to other platforms supporting PM timer emulation,
* disabling the PM timer must be done *after* FSP has run on Xeon-SP,
* because FSP makes use of the PM timer.
*/
if (!CONFIG(USE_PM_ACPI_TIMER))
setbits8(pmc_mmio_regs() + PCH_PWRM_ACPI_TMR_CTL, ACPI_TIM_DIS);
apm_control(APM_CNT_FINALIZE);
lock_pam0123();
if (CONFIG_MAX_SOCKET > 1) {
/* This MSR is package scope but run for all cpus for code simplicity */
if (mp_run_on_all_cpus(&lock_msr_ppin_ctl, NULL) != CB_SUCCESS)
printk(BIOS_ERR, "Lock PPIN CTL MSR failed\n");
} else {
lock_msr_ppin_ctl(NULL);
}
post_code(POST_OS_BOOT);
}
BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_ENTRY, soc_finalize, NULL);
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