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Diffstat (limited to 'src/soc/intel/cannonlake/finalize.c')
| -rw-r--r-- | src/soc/intel/cannonlake/finalize.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/src/soc/intel/cannonlake/finalize.c b/src/soc/intel/cannonlake/finalize.c new file mode 100644 index 0000000000..8aa7c04302 --- /dev/null +++ b/src/soc/intel/cannonlake/finalize.c @@ -0,0 +1,146 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 Google Inc. + * Copyright (C) 2017 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 <bootstate.h> +#include <chip.h> +#include <console/console.h> +#include <console/post_codes.h> +#include <cpu/x86/smm.h> +#include <device/pci.h> +#include <intelblocks/lpc_lib.h> +#include <intelblocks/pcr.h> +#include <reg_script.h> +#include <spi-generic.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> + +#define PSF_BASE_ADDRESS 0x300 +#define PCR_PSFX_T0_SHDW_PCIEN 0x1C +#define PCR_PSFX_T0_SHDW_PCIEN_FUNDIS (1 << 8) + +static void pch_configure_endpoints(device_t dev, int epmask_id, uint32_t mask) +{ + uint32_t reg32; + + reg32 = pci_read_config32(dev, PCH_P2SB_EPMASK(epmask_id)); + pci_write_config32(dev, PCH_P2SB_EPMASK(epmask_id), reg32 | mask); +} + +static void disable_sideband_access(void) +{ + device_t dev; + u8 reg8; + uint32_t mask; + + dev = PCH_DEV_P2SB; + + /* Remove the host accessing right to PSF register range. */ + /* Set p2sb PCI offset EPMASK5 [29, 28, 27, 26] to [1, 1, 1, 1] */ + mask = (1 << 29) | (1 << 28) | (1 << 27) | (1 << 26); + pch_configure_endpoints(dev, 5, mask); + + /* Set the "Endpoint Mask Lock!", P2SB PCI offset E2h bit[1] to 1. */ + reg8 = pci_read_config8(dev, PCH_P2SB_E0 + 2); + pci_write_config8(dev, PCH_P2SB_E0 + 2, reg8 | (1 << 1)); +} + +static void pch_disable_heci(void) +{ + device_t dev = PCH_DEV_P2SB; + + /* + * if p2sb device 1f.1 is not present or hidden in devicetree + * p2sb device becomes NULL + */ + if (!dev) + return; + + /* unhide p2sb device */ + pci_write_config8(dev, PCH_P2SB_E0 + 1, 0); + + /* disable heci#1 */ + pcr_or32(PID_PSF1, PSF_BASE_ADDRESS + PCR_PSFX_T0_SHDW_PCIEN, + PCR_PSFX_T0_SHDW_PCIEN_FUNDIS); + + disable_sideband_access(); + + /* hide p2sb device */ + pci_write_config8(dev, PCH_P2SB_E0 + 1, 1); +} + +static void pch_finalize(void) +{ + device_t dev; + uint32_t reg32; + uint16_t tcobase, tcocnt; + uint8_t *pmcbase; + config_t *config; + uint8_t reg8; + + /* TCO Lock down */ + tcobase = smbus_tco_regs(); + tcocnt = inw(tcobase + TCO1_CNT); + tcocnt |= TCO_LOCK; + outw(tcocnt, tcobase + TCO1_CNT); + + /* + * 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 + */ + dev = PCH_DEV_PMC; + config = dev->chip_info; + pmcbase = pmc_mmio_regs(); + 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 + CPPMVRIC); + reg32 |= XTALSDQDIS; + write32(pmcbase + CPPMVRIC, reg32); + } + + /* we should disable Heci1 based on the devicetree policy */ + if (config->HeciEnabled == 0) + pch_disable_heci(); +} + +static void soc_finalize(void *unused) +{ + printk(BIOS_DEBUG, "Finalizing chipset.\n"); + + pch_finalize(); + + 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); |