/* SPDX-License-Identifier: GPL-2.0-only */ /* * This file is created based on Intel Tiger Lake Processor PCH Datasheet * Document number: 575857 * Chapter number: 4 */ #include <device/mmio.h> #include <intelblocks/cfg.h> #include <intelpch/lockdown.h> #include <soc/pm.h> #include <stdint.h> 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(); } void soc_lockdown_config(int chipset_lockdown) { /* PMC lock down configuration */ pmc_lockdown_cfg(chipset_lockdown); }