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/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/mmio.h>
#include <intelblocks/cfg.h>
#include <intelblocks/pcr.h>
#include <intelpch/lockdown.h>
#include <soc/pcr_ids.h>
#include <soc/pm.h>
#include <stdint.h>
/* PCR PSTH Control Register */
#define PCR_PSTH_CTRLREG 0x1d00
#define PSTH_CTRLREG_IOSFPTCGE (1 << 2)
static void pmc_lock_pmsync(void)
{
uint8_t *pmcbase;
uint32_t pmsyncreg;
pmcbase = pmc_mmio_regs();
pmsyncreg = read32(pmcbase + PMSYNC_TPR_CFG);
pmsyncreg |= PCH2CPU_TPR_CFG_LOCK;
write32(pmcbase + PMSYNC_TPR_CFG, pmsyncreg);
}
static void pmc_lock_abase(void)
{
uint8_t *pmcbase;
uint32_t reg32;
pmcbase = pmc_mmio_regs();
reg32 = read32(pmcbase + GEN_PMCON_B);
reg32 |= (SLP_STR_POL_LOCK | ACPI_BASE_LOCK);
write32(pmcbase + GEN_PMCON_B, reg32);
}
static void pmc_lock_smi(void)
{
uint8_t *pmcbase;
uint8_t reg8;
pmcbase = pmc_mmio_regs();
reg8 = read8(pmcbase + GEN_PMCON_B);
reg8 |= SMI_LOCK;
write8(pmcbase + GEN_PMCON_B, reg8);
}
static void pmc_lockdown_cfg(int chipset_lockdown)
{
/* PMSYNC */
pmc_lock_pmsync();
/* Lock down ABASE and sleep stretching policy */
pmc_lock_abase();
if (chipset_lockdown == CHIPSET_LOCKDOWN_COREBOOT)
pmc_lock_smi();
}
static void soc_die_lockdown_cfg(void)
{
if (CONFIG(USE_FSP_NOTIFY_PHASE_POST_PCI_ENUM))
return;
/* Enable IOSF Primary Trunk Clock Gating */
pcr_rmw32(PID_PSTH, PCR_PSTH_CTRLREG, ~0, PSTH_CTRLREG_IOSFPTCGE);
}
void soc_lockdown_config(int chipset_lockdown)
{
/* PMC lock down configuration */
pmc_lockdown_cfg(chipset_lockdown);
/* SOC Die lock down configuration */
soc_die_lockdown_cfg();
}
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