arch/x86/cpu/coreboot/timestamp.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
   4  *
   5  * Modified from the coreboot version
   6  */
   7
   8 #include <common.h>
   9 #include <asm/arch/timestamp.h>
  10 #include <asm/arch/sysinfo.h>
  11 #include <linux/compiler.h>
  12
  13 struct timestamp_entry {
  14         uint32_t        entry_id;
  15         uint64_t        entry_stamp;
  16 } __packed;
  17
  18 struct timestamp_table {
  19         uint64_t        base_time;
  20         uint32_t        max_entries;
  21         uint32_t        num_entries;
  22         struct timestamp_entry entries[0]; /* Variable number of entries */
  23 } __packed;
  24
  25 static struct timestamp_table *ts_table  __attribute__((section(".data")));
  26
  27 void timestamp_init(void)
  28 {
  29         timestamp_add_now(TS_U_BOOT_INITTED);
  30 }
  31
  32 void timestamp_add(enum timestamp_id id, uint64_t ts_time)
  33 {
  34         struct timestamp_entry *tse;
  35
  36         if (!ts_table || (ts_table->num_entries == ts_table->max_entries))
  37                 return;
  38
  39         tse = &ts_table->entries[ts_table->num_entries++];
  40         tse->entry_id = id;
  41         tse->entry_stamp = ts_time - ts_table->base_time;
  42 }
  43
  44 void timestamp_add_now(enum timestamp_id id)
  45 {
  46         timestamp_add(id, rdtsc());
  47 }
  48
  49 int timestamp_add_to_bootstage(void)
  50 {
  51         uint i;
  52
  53         if (!ts_table)
  54                 return -1;
  55
  56         for (i = 0; i < ts_table->num_entries; i++) {
  57                 struct timestamp_entry *tse = &ts_table->entries[i];
  58                 const char *name = NULL;
  59
  60                 switch (tse->entry_id) {
  61                 case TS_START_ROMSTAGE:
  62                         name = "start-romstage";
  63                         break;
  64                 case TS_BEFORE_INITRAM:
  65                         name = "before-initram";
  66                         break;
  67                 case TS_DEVICE_INITIALIZE:
  68                         name = "device-initialize";
  69                         break;
  70                 case TS_DEVICE_DONE:
  71                         name = "device-done";
  72                         break;
  73                 case TS_SELFBOOT_JUMP:
  74                         name = "selfboot-jump";
  75                         break;
  76                 }
  77                 if (name) {
  78                         bootstage_add_record(0, name, BOOTSTAGEF_ALLOC,
  79                                              tse->entry_stamp /
  80                                                         get_tbclk_mhz());
  81                 }
  82         }
  83
  84         return 0;
  85 }