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 <bootstage.h>
  10 #include <asm/arch/timestamp.h>
  11 #include <asm/arch/sysinfo.h>
  12 #include <linux/compiler.h>
  13
  14 struct timestamp_entry {
  15         uint32_t        entry_id;
  16         uint64_t        entry_stamp;
  17 } __packed;
  18
  19 struct timestamp_table {
  20         uint64_t        base_time;
  21         uint32_t        max_entries;
  22         uint32_t        num_entries;
  23         struct timestamp_entry entries[0]; /* Variable number of entries */
  24 } __packed;
  25
  26 static struct timestamp_table *ts_table  __attribute__((section(".data")));
  27
  28 void timestamp_init(void)
  29 {
  30         timestamp_add_now(TS_U_BOOT_INITTED);
  31 }
  32
  33 void timestamp_add(enum timestamp_id id, uint64_t ts_time)
  34 {
  35         struct timestamp_entry *tse;
  36
  37         if (!ts_table || (ts_table->num_entries == ts_table->max_entries))
  38                 return;
  39
  40         tse = &ts_table->entries[ts_table->num_entries++];
  41         tse->entry_id = id;
  42         tse->entry_stamp = ts_time - ts_table->base_time;
  43 }
  44
  45 void timestamp_add_now(enum timestamp_id id)
  46 {
  47         timestamp_add(id, rdtsc());
  48 }
  49
  50 int timestamp_add_to_bootstage(void)
  51 {
  52         uint i;
  53
  54         if (!ts_table)
  55                 return -1;
  56
  57         for (i = 0; i < ts_table->num_entries; i++) {
  58                 struct timestamp_entry *tse = &ts_table->entries[i];
  59                 const char *name = NULL;
  60
  61                 switch (tse->entry_id) {
  62                 case TS_START_ROMSTAGE:
  63                         name = "start-romstage";
  64                         break;
  65                 case TS_BEFORE_INITRAM:
  66                         name = "before-initram";
  67                         break;
  68                 case TS_DEVICE_INITIALIZE:
  69                         name = "device-initialize";
  70                         break;
  71                 case TS_DEVICE_DONE:
  72                         name = "device-done";
  73                         break;
  74                 case TS_SELFBOOT_JUMP:
  75                         name = "selfboot-jump";
  76                         break;
  77                 }
  78                 if (name) {
  79                         bootstage_add_record(0, name, BOOTSTAGEF_ALLOC,
  80                                              tse->entry_stamp /
  81                                                         get_tbclk_mhz());
  82                 }
  83         }
  84
  85         return 0;
  86 }