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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Intel Corp.
* (Written by Andrey Petrov <andrey.petrov@intel.com> for Intel Corp.)
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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/cpu.h>
#include <bootblock_common.h>
#include <cpu/x86/mtrr.h>
#include <device/pci.h>
#include <lib.h>
#include <soc/iomap.h>
#include <soc/cpu.h>
#include <soc/gpio.h>
#include <soc/mmap_boot.h>
#include <soc/northbridge.h>
#include <soc/pci_devs.h>
#include <soc/pm.h>
#include <soc/uart.h>
#include <spi-generic.h>
#include <timestamp.h>
static const struct pad_config tpm_spi_configs[] = {
PAD_CFG_NF(GPIO_106, NATIVE, DEEP, NF3), /* FST_SPI_CS2_N */
};
static void tpm_enable(void)
{
/* Configure gpios */
gpio_configure_pads(tpm_spi_configs, ARRAY_SIZE(tpm_spi_configs));
}
static void enable_pm_timer(void)
{
/* ACPI PM timer emulation */
msr_t msr;
/*
* The derived frequency is calculated as follows:
* (CTC_FREQ * msr[63:32]) >> 32 = target frequency.
* Back solve the multiplier so the 3.579545MHz ACPI timer
* frequency is used.
*/
msr.hi = (3579545ULL << 32) / CTC_FREQ;
/* Set PM1 timer IO port and enable*/
msr.lo = EMULATE_PM_TMR_EN | (ACPI_PMIO_BASE + R_ACPI_PM1_TMR);
wrmsr(MSR_EMULATE_PM_TMR, msr);
}
void asmlinkage bootblock_c_entry(uint64_t base_timestamp)
{
device_t dev = NB_DEV_ROOT;
/* Set PCI Express BAR */
pci_io_write_config32(dev, PCIEXBAR, CONFIG_MMCONF_BASE_ADDRESS | 1);
/*
* Clear TSEG register - TSEG register comes out of reset with a
* non-zero default value. Clear this register to ensure that there are
* no surprises in CBMEM handling.
*/
pci_write_config32(dev, TSEG, 0);
dev = P2SB_DEV;
/* BAR and MMIO enable for IOSF, so that GPIOs can be configured */
pci_write_config32(dev, PCI_BASE_ADDRESS_0, CONFIG_IOSF_BASE_ADDRESS);
pci_write_config32(dev, PCI_BASE_ADDRESS_1, 0);
pci_write_config16(dev, PCI_COMMAND,
PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
/* Decode the ACPI I/O port range for early firmware verification.*/
dev = PMC_DEV;
pci_write_config16(dev, PCI_BASE_ADDRESS_4, ACPI_PMIO_BASE);
pci_write_config16(dev, PCI_COMMAND,
PCI_COMMAND_IO | PCI_COMMAND_MASTER);
/* Call lib/bootblock.c main */
bootblock_main_with_timestamp(base_timestamp);
}
static void cache_bios_region(void)
{
int mtrr;
size_t rom_size;
uint32_t alignment;
mtrr = get_free_var_mtrr();
if (mtrr==-1)
return;
/* Only the IFD BIOS region is memory mapped (at top of 4G) */
rom_size = get_bios_size();
/* Round to power of two */
alignment = 1 << (log2_ceil(rom_size));
rom_size = ALIGN_UP(rom_size, alignment);
set_var_mtrr(mtrr, 4ULL*GiB - rom_size, rom_size, MTRR_TYPE_WRPROT);
}
/*
* Program temporary BAR for SPI in case any of the stages before ramstage need
* to access SPI MMIO regs. Ramstage will assign a new BAR during PCI
* enumeration.
*/
static void enable_spibar(void)
{
device_t dev = SPI_DEV;
uint8_t val;
/* Disable Bus Master and MMIO space. */
val = pci_read_config8(dev, PCI_COMMAND);
val &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
pci_write_config8(dev, PCI_COMMAND, val);
/* Program Temporary BAR for SPI */
pci_write_config32(dev, PCI_BASE_ADDRESS_0,
PRERAM_SPI_BASE_ADDRESS |
PCI_BASE_ADDRESS_SPACE_MEMORY);
/* Enable Bus Master and MMIO Space */
val = pci_read_config8(dev, PCI_COMMAND);
val |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
pci_write_config8(dev, PCI_COMMAND, val);
/* Initialize SPI to allow BIOS to write/erase on flash. */
spi_init();
}
static void enable_pmcbar(void)
{
device_t pmc = PMC_DEV;
/* Set PMC base addresses and enable decoding. */
pci_write_config32(pmc, PCI_BASE_ADDRESS_0, PMC_BAR0);
pci_write_config32(pmc, PCI_BASE_ADDRESS_1, 0); /* 64-bit BAR */
pci_write_config32(pmc, PCI_BASE_ADDRESS_2, PMC_BAR1);
pci_write_config32(pmc, PCI_BASE_ADDRESS_3, 0); /* 64-bit BAR */
pci_write_config16(pmc, PCI_BASE_ADDRESS_4, ACPI_PMIO_BASE);
pci_write_config16(pmc, PCI_COMMAND,
PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER);
}
void bootblock_soc_early_init(void)
{
enable_pmcbar();
/* Clear global reset promotion bit */
global_reset_enable(0);
/* Prepare UART for serial console. */
if (IS_ENABLED(CONFIG_SOC_UART_DEBUG))
soc_console_uart_init();
if (IS_ENABLED(CONFIG_TPM_ON_FAST_SPI))
tpm_enable();
enable_pm_timer();
enable_spibar();
cache_bios_region();
}
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