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| author | Vadim Bendebury <vbendeb@chromium.org> | 2016-08-07 19:11:45 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-08-08 20:19:46 -0700 |
| commit | 3b24f8ac3f13969b745bae6239d2b7780d6e79cf (patch) | |
| tree | cc0a7228e0364342819f28b3696246b75d8e29c5 /include/system.h | |
| parent | 37784e1e868fc9c722a80dbf1179a72782c87056 (diff) | |
| download | chrome-ec-3b24f8ac3f13969b745bae6239d2b7780d6e79cf.tar.gz | |
cr50: try recovering from rolling rebootsstabilize-8688.B
Sometimes a perfectly sane image enters rolling reboot mode in case
some data change triggered a bug which prevents the normal startup and
causes a reset.
The most likely task causing in in case of cr50 would be the tpm task.
Let's add another check of the restart counter: should it reach the
value of 50, do not start the TPM task.
BRANCH=none
BUG=chrome-os-partner:55708
TEST=with this code plus an unaligned access introduced in tpm
initialization sequence in both RW_A and RW_B, program the full
image on the dev board.
Observe the device reset 50 time is rapid succession and then
stop with the following message on the console:
Bldr |511709
retry|50
Himg =4F992103..408D193E
Hfss =384E4655..EE13EBD0
Hinf =44D21600..B70529BD
jump @00044000
--- UART initialized after reboot ---
[Reset cause: rtc-alarm]
[Image: RW, cr50_v1.1.5044-8d6f7a2+ private-cr51:v0.0.68-633229c ...
+ cryptoc:v0.0.4-5319e83 2016-08-07 19:37:16 vbendeb@kvasha]
[0.004130 Inits done]
[0.006919 Active NVram partition set to 0]
Console is enabled; type HELP for help.
> system_rolling_reboot_suspected: roling reboots suspected. Try \
powercycling to clear
this condition.
[0.010502 Task 2 (TPM) exited!]
Change-Id: I6b08c5c1a02da9edf9bdf394e57cc56d2e595ad1
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/366892
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Diffstat (limited to 'include/system.h')
| -rw-r--r-- | include/system.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/system.h b/include/system.h index 1c04ee3404..7b08683ac0 100644 --- a/include/system.h +++ b/include/system.h @@ -489,4 +489,12 @@ uint32_t system_get_board_properties(void); */ uint32_t system_board_properties_callback(void); +/** + * A function provided by some platforms to hint that something is going + * wrong. + * + * @return a boolean, set to True if rolling reboot condition is suspected. + */ +int system_rolling_reboot_suspected(void); + #endif /* __CROS_EC_SYSTEM_H */ |