mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 17:08:52 +09:00
![Simon Glass](/assets/img/avatar_default.png)
This defines the basics of a new boot time measurement feature. This allows logging of very accurate time measurements as the boot proceeds, by using an available microsecond counter. To enable the feature, define CONFIG_BOOTSTAGE in your board config file. Also available is CONFIG_BOOTSTAGE_REPORT which will cause a report to be printed just before handing off to the OS. Most IDs are not named at this stage. For that I would first like to renumber them all. Timer summary in microseconds: Mark Elapsed Stage 0 0 reset 205,000 205,000 board_init_f 6,053,000 5,848,000 bootm_start 6,053,000 0 id=1 6,058,000 5,000 id=101 6,058,000 0 id=100 6,061,000 3,000 id=103 6,064,000 3,000 id=104 6,093,000 29,000 id=107 6,093,000 0 id=106 6,093,000 0 id=105 6,093,000 0 id=108 7,089,000 996,000 id=7 7,089,000 0 id=15 7,089,000 0 id=8 7,097,000 8,000 start_kernel Signed-off-by: Simon Glass <sjg@chromium.org>
159 lines
3.9 KiB
C
159 lines
3.9 KiB
C
/*
|
|
* Copyright (c) 2011, Google Inc. All rights reserved.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
|
|
/*
|
|
* This module records the progress of boot and arbitrary commands, and
|
|
* permits accurate timestamping of each.
|
|
*
|
|
* TBD: Pass timings to kernel in the FDT
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <libfdt.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
enum bootstage_flags {
|
|
BOOTSTAGEF_ERROR = 1 << 0, /* Error record */
|
|
BOOTSTAGEF_ALLOC = 1 << 1, /* Allocate an id */
|
|
};
|
|
|
|
struct bootstage_record {
|
|
ulong time_us;
|
|
const char *name;
|
|
int flags; /* see enum bootstage_flags */
|
|
enum bootstage_id id;
|
|
};
|
|
|
|
static struct bootstage_record record[BOOTSTAGE_ID_COUNT] = { {1} };
|
|
static int next_id = BOOTSTAGE_ID_USER;
|
|
|
|
ulong bootstage_add_record(enum bootstage_id id, const char *name,
|
|
int flags)
|
|
{
|
|
struct bootstage_record *rec;
|
|
ulong mark = timer_get_boot_us();
|
|
|
|
if (flags & BOOTSTAGEF_ALLOC)
|
|
id = next_id++;
|
|
|
|
if (id < BOOTSTAGE_ID_COUNT) {
|
|
rec = &record[id];
|
|
|
|
/* Only record the first event for each */
|
|
if (!rec->time_us) {
|
|
rec->time_us = mark;
|
|
rec->name = name;
|
|
rec->flags = flags;
|
|
rec->id = id;
|
|
}
|
|
}
|
|
|
|
/* Tell the board about this progress */
|
|
show_boot_progress(flags & BOOTSTAGEF_ERROR ? -id : id);
|
|
return mark;
|
|
}
|
|
|
|
|
|
ulong bootstage_mark(enum bootstage_id id)
|
|
{
|
|
return bootstage_add_record(id, NULL, 0);
|
|
}
|
|
|
|
ulong bootstage_error(enum bootstage_id id)
|
|
{
|
|
return bootstage_add_record(id, NULL, BOOTSTAGEF_ERROR);
|
|
}
|
|
|
|
ulong bootstage_mark_name(enum bootstage_id id, const char *name)
|
|
{
|
|
int flags = 0;
|
|
|
|
if (id == BOOTSTAGE_ID_ALLOC)
|
|
flags = BOOTSTAGEF_ALLOC;
|
|
return bootstage_add_record(id, name, flags);
|
|
}
|
|
|
|
static void print_time(unsigned long us_time)
|
|
{
|
|
char str[15], *s;
|
|
int grab = 3;
|
|
|
|
/* We don't seem to have %'d in U-Boot */
|
|
sprintf(str, "%12lu", us_time);
|
|
for (s = str + 3; *s; s += grab) {
|
|
if (s != str + 3)
|
|
putc(s[-1] != ' ' ? ',' : ' ');
|
|
printf("%.*s", grab, s);
|
|
grab = 3;
|
|
}
|
|
}
|
|
|
|
static uint32_t print_time_record(enum bootstage_id id,
|
|
struct bootstage_record *rec, uint32_t prev)
|
|
{
|
|
print_time(rec->time_us);
|
|
print_time(rec->time_us - prev);
|
|
if (rec->name)
|
|
printf(" %s\n", rec->name);
|
|
else if (id >= BOOTSTAGE_ID_USER)
|
|
printf(" user_%d\n", id - BOOTSTAGE_ID_USER);
|
|
else
|
|
printf(" id=%d\n", id);
|
|
return rec->time_us;
|
|
}
|
|
|
|
static int h_compare_record(const void *r1, const void *r2)
|
|
{
|
|
const struct bootstage_record *rec1 = r1, *rec2 = r2;
|
|
|
|
return rec1->time_us > rec2->time_us ? 1 : -1;
|
|
}
|
|
|
|
void bootstage_report(void)
|
|
{
|
|
struct bootstage_record *rec = record;
|
|
int id;
|
|
uint32_t prev;
|
|
|
|
puts("Timer summary in microseconds:\n");
|
|
printf("%11s%11s %s\n", "Mark", "Elapsed", "Stage");
|
|
|
|
/* Fake the first record - we could get it from early boot */
|
|
rec->name = "reset";
|
|
rec->time_us = 0;
|
|
prev = print_time_record(BOOTSTAGE_ID_AWAKE, rec, 0);
|
|
|
|
/* Sort records by increasing time */
|
|
qsort(record, ARRAY_SIZE(record), sizeof(*rec), h_compare_record);
|
|
|
|
for (id = 0; id < BOOTSTAGE_ID_COUNT; id++, rec++) {
|
|
if (rec->time_us != 0)
|
|
prev = print_time_record(rec->id, rec, prev);
|
|
}
|
|
if (next_id > BOOTSTAGE_ID_COUNT)
|
|
printf("(Overflowed internal boot id table by %d entries\n"
|
|
"- please increase CONFIG_BOOTSTAGE_USER_COUNT\n",
|
|
next_id - BOOTSTAGE_ID_COUNT);
|
|
}
|