You can call bootstage_report() at any time to print a report on boot stage
timings. It should ideally be called just before U-Boot hands off execution
to the next stage boot.
Signed-off-by: Simon Glass <s...@chromium.org>
---
common/bootstage.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
include/bootstage.h | 3 +++
2 files changed, 51 insertions(+), 0 deletions(-)
diff --git a/common/bootstage.c b/common/bootstage.c
index 10f1f34..5e0178a 100644
--- a/common/bootstage.c
+++ b/common/bootstage.c
@@ -47,3 +47,51 @@ uint32_t bootstage_mark(enum bootstage_id id, const char
*name)
}
return rec->time_us;
}
+
+static void print_time(unsigned long us_time)
+{
+ char str[12], *s;
+ int grab = 3;
+
+ /* We don't seem to have %'d in U-Boot */
+ sprintf(str, "%9ld", us_time);
+ for (s = str; *s; s += grab) {
+ if (s != str)
+ 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
+ printf(" id=%d\n", id);
+ return rec->time_us;
+}
+
+void bootstage_report(void)
+{
+ 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 */
+ prev = 0;
+ record[BOOTSTAGE_AWAKE].name = "awake";
+
+ for (id = 0; id < BOOTSTAGE_COUNT; id++) {
+ struct bootstage_record *rec = &record[id];
+
+ if (id == BOOTSTAGE_AWAKE || rec->time_us != 0)
+ prev = print_time_record(id, rec, prev);
+ }
+}
+
diff --git a/include/bootstage.h b/include/bootstage.h
index ba656ff..b645434 100644
--- a/include/bootstage.h
+++ b/include/bootstage.h
@@ -60,6 +60,9 @@ enum bootstage_id {
*/
uint32_t bootstage_mark(enum bootstage_id id, const char *name);
+/* Print a report about boot time */
+void bootstage_report(void);
+
#else
static inline uint32_t bootstage_mark(enum bootstage_id id, const char *name)
--
1.7.3.1
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