src/lib/bootblock.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi.h>
   4 #include <arch/exception.h>
   5 #include <bootblock_common.h>
   6 #include <console/console.h>
   7 #include <delay.h>
   8 #include <metadata_hash.h>
   9 #include <option.h>
  10 #include <post.h>
  11 #include <program_loading.h>
  12 #include <security/tpm/tspi.h>
  13 #include <symbols.h>
  14 #include <timestamp.h>
  15
  16 __weak void bootblock_mainboard_early_init(void) { /* no-op */ }
  17 __weak void bootblock_soc_early_init(void) { /* do nothing */ }
  18 __weak void bootblock_soc_init(void) { /* do nothing */ }
  19 __weak void bootblock_mainboard_init(void) { /* do nothing */ }
  20
  21 /*
  22  * This is a the same as the bootblock main(), with the difference that it does
  23  * not collect a timestamp. Instead it accepts the initial timestamp and
  24  * possibly additional timestamp entries as arguments. This can be used in cases
  25  * where earlier stamps are available. Note that this function is designed to be
  26  * entered from C code. This function assumes that the timer has already been
  27  * initialized, so it does not call init_timer().
  28  */
  29 void bootblock_main_with_timestamp(uint64_t base_timestamp,
  30         struct timestamp_entry *timestamps, size_t num_timestamps)
  31 {
  32         /* Initialize timestamps if we have TIMESTAMP region in memlayout.ld. */
  33         if (CONFIG(COLLECT_TIMESTAMPS) &&
  34             REGION_SIZE(timestamp) > 0) {
  35                 int i;
  36                 timestamp_init(base_timestamp);
  37                 for (i = 0; i < num_timestamps; i++)
  38                         timestamp_add(timestamps[i].entry_id,
  39                                       timestamps[i].entry_stamp);
  40         }
  41
  42         timestamp_add_now(TS_START_BOOTBLOCK);
  43
  44         bootblock_soc_early_init();
  45         bootblock_mainboard_early_init();
  46
  47         if (CONFIG(USE_OPTION_TABLE))
  48                 sanitize_cmos();
  49
  50         if (CONFIG(CMOS_POST))
  51                 cmos_post_init();
  52
  53         if (CONFIG(BOOTBLOCK_CONSOLE)) {
  54                 console_init();
  55                 exception_init();
  56         }
  57
  58         bootblock_soc_init();
  59         bootblock_mainboard_init();
  60
  61         if (CONFIG(TPM_MEASURED_BOOT_INIT_BOOTBLOCK)) {
  62                 int s3resume = acpi_is_wakeup_s3();
  63                 tpm_setup(s3resume);
  64         }
  65
  66         timestamp_add_now(TS_END_BOOTBLOCK);
  67
  68         run_romstage();
  69 }
  70
  71 void bootblock_main_with_basetime(uint64_t base_timestamp)
  72 {
  73         bootblock_main_with_timestamp(base_timestamp, NULL, 0);
  74 }
  75
  76 void main(void)
  77 {
  78         uint64_t base_timestamp = 0;
  79
  80         init_timer();
  81
  82         if (CONFIG(COLLECT_TIMESTAMPS))
  83                 base_timestamp = timestamp_get();
  84
  85         bootblock_main_with_timestamp(base_timestamp, NULL, 0);
  86 }
  87
  88 #if CONFIG(COMPRESS_BOOTBLOCK)
  89 /*
  90  * This is the bootblock entry point when it is run after a decompressor stage.
  91  * For non-decompressor builds, _start is generally defined in architecture-
  92  * specific assembly code. In decompressor builds that architecture
  93  * initialization code already ran in the decompressor, so the bootblock can
  94  * start straight into common code with a C environment.
  95  */
  96 void _start(struct bootblock_arg *arg);
  97 void _start(struct bootblock_arg *arg)
  98 {
  99         if (CONFIG(CBFS_VERIFICATION))
 100                 metadata_hash_import_anchor(arg->metadata_hash_anchor);
 101         bootblock_main_with_timestamp(arg->base_timestamp, arg->timestamps,
 102                                       arg->num_timestamps);
 103 }
 104
 105 #endif