bootblock.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <acpi/acpi.h>
#include <arch/exception.h>
#include <bootblock_common.h>
#include <console/console.h>
#include <delay.h>
#include <metadata_hash.h>
#include <option.h>
#include <post.h>
#include <program_loading.h>
#include <security/tpm/tspi.h>
#include <symbols.h>
#include <timestamp.h>
 
__weak void bootblock_mainboard_early_init(void) { /* no-op */ }
__weak void bootblock_soc_early_init(void) { /* do nothing */ }
__weak void bootblock_soc_init(void) { /* do nothing */ }
__weak void bootblock_mainboard_init(void) { /* do nothing */ }
 
/*
 * This is a the same as the bootblock main(), with the difference that it does
 * not collect a timestamp. Instead it accepts the initial timestamp and
 * possibly additional timestamp entries as arguments. This can be used in cases
 * where earlier stamps are available. Note that this function is designed to be
 * entered from C code. This function assumes that the timer has already been
 * initialized, so it does not call init_timer().
 */
void bootblock_main_with_timestamp(uint64_t base_timestamp,
        struct timestamp_entry *timestamps, size_t num_timestamps)
{
        /* Initialize timestamps if we have TIMESTAMP region in memlayout.ld. */
        if (CONFIG(COLLECT_TIMESTAMPS) &&
            REGION_SIZE(timestamp) > 0) {
                int i;
                timestamp_init(base_timestamp);
                for (i = 0; i < num_timestamps; i++)
                        timestamp_add(timestamps[i].entry_id,
                                      timestamps[i].entry_stamp);
        }
 
        timestamp_add_now(TS_BOOTBLOCK_START);
 
        bootblock_soc_early_init();
        bootblock_mainboard_early_init();
 
        if (CONFIG(USE_OPTION_TABLE))
                sanitize_cmos();
 
        if (CONFIG(CMOS_POST))
                cmos_post_init();
 
        if (CONFIG(BOOTBLOCK_CONSOLE)) {
                console_init();
                exception_init();
        }
 
        bootblock_soc_init();
        bootblock_mainboard_init();
 
        if (CONFIG(TPM_MEASURED_BOOT_INIT_BOOTBLOCK)) {
                int s3resume = acpi_is_wakeup_s3();
                tpm_setup(s3resume);
        }
 
        timestamp_add_now(TS_BOOTBLOCK_END);
 
        run_romstage();
}
 
void bootblock_main_with_basetime(uint64_t base_timestamp)
{
        bootblock_main_with_timestamp(base_timestamp, NULL, 0);
}
 
void main(void)
{
        uint64_t base_timestamp = 0;
 
        init_timer();
 
        if (CONFIG(COLLECT_TIMESTAMPS))
                base_timestamp = timestamp_get();
 
        bootblock_main_with_timestamp(base_timestamp, NULL, 0);
}
 
#if CONFIG(COMPRESS_BOOTBLOCK)
/*
 * This is the bootblock entry point when it is run after a decompressor stage.
 * For non-decompressor builds, _start is generally defined in architecture-
 * specific assembly code. In decompressor builds that architecture
 * initialization code already ran in the decompressor, so the bootblock can
 * start straight into common code with a C environment.
 */
void _start(struct bootblock_arg *arg);
void _start(struct bootblock_arg *arg)
{
        if (CONFIG(CBFS_VERIFICATION))
                metadata_hash_import_anchor(arg->metadata_hash_anchor);
        bootblock_main_with_timestamp(arg->base_timestamp, arg->timestamps,
                                      arg->num_timestamps);
}
 
#endif