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 <bootstage.h>
   9 #include <asm/arch/timestamp.h>
  10 #include <asm/cb_sysinfo.h>
  11 #include <asm/u-boot-x86.h>
  12 #include <linux/compiler.h>
  13
  14 static struct timestamp_table *ts_table  __section(".data");
  15
  16 void timestamp_init(void)
  17 {
  18         timestamp_add_now(TS_U_BOOT_INITTED);
  19 }
  20
  21 void timestamp_add(enum timestamp_id id, uint64_t ts_time)
  22 {
  23         struct timestamp_entry *tse;
  24
  25         if (!ts_table || (ts_table->num_entries == ts_table->max_entries))
  26                 return;
  27
  28         tse = &ts_table->entries[ts_table->num_entries++];
  29         tse->entry_id = id;
  30         tse->entry_stamp = ts_time - ts_table->base_time;
  31 }
  32
  33 void timestamp_add_now(enum timestamp_id id)
  34 {
  35         timestamp_add(id, rdtsc());
  36 }
  37
  38 int timestamp_add_to_bootstage(void)
  39 {
  40         uint i;
  41
  42         if (!ts_table)
  43                 return -1;
  44
  45         for (i = 0; i < ts_table->num_entries; i++) {
  46                 struct timestamp_entry *tse = &ts_table->entries[i];
  47                 const char *name = NULL;
  48
  49                 switch (tse->entry_id) {
  50                 case TS_START_ROMSTAGE:
  51                         name = "start-romstage";
  52                         break;
  53                 case TS_BEFORE_INITRAM:
  54                         name = "before-initram";
  55                         break;
  56                 case TS_DEVICE_INITIALIZE:
  57                         name = "device-initialize";
  58                         break;
  59                 case TS_DEVICE_DONE:
  60                         name = "device-done";
  61                         break;
  62                 case TS_SELFBOOT_JUMP:
  63                         name = "selfboot-jump";
  64                         break;
  65                 }
  66                 if (name) {
  67                         bootstage_add_record(0, name, BOOTSTAGEF_ALLOC,
  68                                              tse->entry_stamp /
  69                                                         get_tbclk_mhz());
  70                 }
  71         }
  72
  73         return 0;
  74 }