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* Copyright (c) 2011, Google Inc. All rights reserved.
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* See file CREDITS for list of people who contributed to this
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* This module records the progress of boot and arbitrary commands, and
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* permits accurate timestamping of each.
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* TBD: Pass timings to kernel in the FDT
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DECLARE_GLOBAL_DATA_PTR;
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enum bootstage_flags {
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BOOTSTAGEF_ERROR = 1 << 0, /* Error record */
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BOOTSTAGEF_ALLOC = 1 << 1, /* Allocate an id */
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struct bootstage_record {
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int flags; /* see enum bootstage_flags */
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static struct bootstage_record record[BOOTSTAGE_ID_COUNT] = { {1} };
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static int next_id = BOOTSTAGE_ID_USER;
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ulong bootstage_add_record(enum bootstage_id id, const char *name,
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struct bootstage_record *rec;
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ulong mark = timer_get_boot_us();
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if (flags & BOOTSTAGEF_ALLOC)
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if (id < BOOTSTAGE_ID_COUNT) {
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/* Only record the first event for each */
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/* Tell the board about this progress */
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show_boot_progress(flags & BOOTSTAGEF_ERROR ? -id : id);
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ulong bootstage_mark(enum bootstage_id id)
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return bootstage_add_record(id, NULL, 0);
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ulong bootstage_error(enum bootstage_id id)
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return bootstage_add_record(id, NULL, BOOTSTAGEF_ERROR);
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ulong bootstage_mark_name(enum bootstage_id id, const char *name)
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if (id == BOOTSTAGE_ID_ALLOC)
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flags = BOOTSTAGEF_ALLOC;
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return bootstage_add_record(id, name, flags);
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static void print_time(unsigned long us_time)
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/* We don't seem to have %'d in U-Boot */
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sprintf(str, "%12lu", us_time);
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for (s = str + 3; *s; s += grab) {
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putc(s[-1] != ' ' ? ',' : ' ');
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printf("%.*s", grab, s);
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static uint32_t print_time_record(enum bootstage_id id,
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struct bootstage_record *rec, uint32_t prev)
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print_time(rec->time_us);
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print_time(rec->time_us - prev);
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printf(" %s\n", rec->name);
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else if (id >= BOOTSTAGE_ID_USER)
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printf(" user_%d\n", id - BOOTSTAGE_ID_USER);
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printf(" id=%d\n", id);
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static int h_compare_record(const void *r1, const void *r2)
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const struct bootstage_record *rec1 = r1, *rec2 = r2;
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return rec1->time_us > rec2->time_us ? 1 : -1;
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void bootstage_report(void)
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struct bootstage_record *rec = record;
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puts("Timer summary in microseconds:\n");
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printf("%11s%11s %s\n", "Mark", "Elapsed", "Stage");
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/* Fake the first record - we could get it from early boot */
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prev = print_time_record(BOOTSTAGE_ID_AWAKE, rec, 0);
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/* Sort records by increasing time */
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qsort(record, ARRAY_SIZE(record), sizeof(*rec), h_compare_record);
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for (id = 0; id < BOOTSTAGE_ID_COUNT; id++, rec++) {
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if (rec->time_us != 0)
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prev = print_time_record(rec->id, rec, prev);
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if (next_id > BOOTSTAGE_ID_COUNT)
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printf("(Overflowed internal boot id table by %d entries\n"
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"- please increase CONFIG_BOOTSTAGE_USER_COUNT\n",
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next_id - BOOTSTAGE_ID_COUNT);
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ulong __timer_get_boot_us(void)
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static ulong base_time;
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* We can't implement this properly. Return 0 on the first call and
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* larger values after that.
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return get_timer(base_time) * 1000;
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base_time = get_timer(0);
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ulong timer_get_boot_us(void)
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__attribute__((weak, alias("__timer_get_boot_us")));