From 2871e0e78c309041a0f3d6e0d7dca99bcaf9f12a Mon Sep 17 00:00:00 2001 From: Subrata Banik Date: Sun, 27 Sep 2020 11:30:58 +0530 Subject: soc/intel/alderlake/ramstage: Do initial SoC commit till ramstage List of changes: 1. Add required SoC programming till ramstage 2. Include only required headers into include/soc 3. Add CPU, PCH and SA EDS document number and chapter number 4. Fill required FSP-S UPD to call FSP-S API Change-Id: I3394f585d66b14ece67cde9e45ffa1177406f35f Signed-off-by: Subrata Banik Reviewed-on: https://review.coreboot.org/c/coreboot/+/45759 Tested-by: build bot (Jenkins) Reviewed-by: Angel Pons --- src/soc/intel/alderlake/lockdown.c | 66 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 src/soc/intel/alderlake/lockdown.c (limited to 'src/soc/intel/alderlake/lockdown.c') diff --git a/src/soc/intel/alderlake/lockdown.c b/src/soc/intel/alderlake/lockdown.c new file mode 100644 index 0000000000..e9e4b592e8 --- /dev/null +++ b/src/soc/intel/alderlake/lockdown.c @@ -0,0 +1,66 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +/* + * This file is created based on Intel Alder Lake Processor PCH Datasheet + * Document number: 621483 + * Chapter number: 4 + */ + +#include +#include +#include +#include +#include + +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); +} -- cgit v1.2.3