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| author | Vadim Bendebury <vbendeb@chromium.org> | 2019-05-13 11:22:22 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-05-23 02:14:18 -0700 |
| commit | 54a4479e64bb8caed335a38402af2bd46538777d (patch) | |
| tree | 41e29397e2254e6bec4540b9b761c3be18f29b17 /include | |
| parent | 290708976c622282fb41ea575b8bda309ae31349 (diff) | |
| download | chrome-ec-54a4479e64bb8caed335a38402af2bd46538777d.tar.gz | |
flash_log: add api for setting base timestamp
The Cr50 environment does not have a wall clock, which makes it
impossible to associate flash log entries with real time.
This patch provides an API which allows to set a base time value and
then use it plus current Cr50 uptime to generate more sensible flash
log timestamps.
Care is taken to ensure that attempts to set timestamp base such that
it would cause a log timestamps rollback do not succeed.
A unit test is being added to verify this behavior.
BRANCH=none
BUG=b:132287488
TEST='make buildall -j' (which runs the new tests) succeeds.
Change-Id: I7521df1bac5aef67e0cf634c183bf1618655f48d
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1610719
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Andrey Pronin <apronin@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/flash_log.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/flash_log.h b/include/flash_log.h index bbdd8bb0b3..ee56226be6 100644 --- a/include/flash_log.h +++ b/include/flash_log.h @@ -132,10 +132,21 @@ int flash_log_dequeue_event(uint32_t event_after, void *buffer, void flash_log_register_flash_control_callback( void (*flash_control)(int enable)); +/* + * Set log timestamp base. The argument is current epoch time in seconds. + * Return value of EC_ERROR_INVAL indicates attempt to set the timestamp base + * to a value below the latest log entry timestamp. + */ +enum ec_error_list flash_log_set_tstamp(uint32_t tstamp); + +/* Get current log timestamp value. */ +uint32_t flash_log_get_tstamp(void); + #if defined(TEST_BUILD) void flash_log_init(void); -extern uint8_t log_event_in_progress; +extern uint32_t last_used_timestamp; extern uint32_t lock_failures_count; +extern uint8_t log_event_in_progress; #endif #endif /* __CROS_EC_EVENT_LOG_H */ |