bootblock.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <bootblock_common.h>
#include <device/pci.h>
#include <FsptUpd.h>
#include <intelblocks/fast_spi.h>
#include <soc/iomap.h>
#include <console/console.h>
#include <cpu/x86/mtrr.h>
#include <intelblocks/lpc_lib.h>
#include <security/intel/cbnt/cbnt.h>
#include <soc/pci_devs.h>
#include <soc/bootblock.h>
#include <fsp/util.h>
 
const FSPT_UPD temp_ram_init_params = {
        .FspUpdHeader = {
                .Signature = FSPT_UPD_SIGNATURE,
                .Revision = 1,
                .Reserved = {0},
        },
        .FsptCoreUpd = {
                .MicrocodeRegionBase = (UINT32)CONFIG_CPU_MICROCODE_CBFS_LOC,
                .MicrocodeRegionLength = (UINT32)CONFIG_CPU_MICROCODE_CBFS_LEN,
                .CodeRegionBase = (UINT32)CACHE_ROM_BASE,
                .CodeRegionLength = (UINT32)CACHE_ROM_SIZE,
                .Reserved1 = {0},
        },
        .FsptConfig = {
                .FsptPort80RouteDisable = 0,
                .ReservedTempRamInitUpd = {0},
        },
        .UnusedUpdSpace0 = {0},
        .UpdTerminator = 0x55AA,
};
 
static uint64_t assembly_timestamp;
static uint64_t bootblock_timestamp;
 
asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
{
        /*
         * FSP-T does not respect its own API and trashes registers
         * coreboot uses to store its initial timestamp.
         */
        assembly_timestamp = base_timestamp;
        bootblock_timestamp = timestamp_get();
        fast_spi_cache_bios_region();
 
        bootblock_main_with_basetime(MIN(assembly_timestamp, bootblock_timestamp));
}
 
void bootblock_soc_early_init(void)
{
        fast_spi_early_init(SPI_BASE_ADDRESS);
        pch_enable_lpc();
 
        /* Set up P2SB BAR. This is needed for PCR to work */
        uint8_t p2sb_cmd = pci_s_read_config8(PCH_DEV_P2SB, PCI_COMMAND);
        pci_s_write_config8(PCH_DEV_P2SB, PCI_COMMAND, p2sb_cmd | PCI_COMMAND_MEMORY);
        pci_s_write_config32(PCH_DEV_P2SB, PCI_BASE_ADDRESS_0, CONFIG_PCR_BASE_ADDRESS);
}
 
void bootblock_soc_init(void)
{
        if (assembly_timestamp > bootblock_timestamp)
                printk(BIOS_WARNING, "Invalid initial timestamp detected\n");
 
        if (CONFIG(FSP_CAR))
                report_fspt_output();
 
        if (CONFIG(INTEL_CBNT_LOGGING))
                intel_cbnt_log_registers();
 
        bootblock_pch_init();
}