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Commit 7ad5ba46 authored by Ilias Apalodimas's avatar Ilias Apalodimas
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Added clarifications on watchdog assumptions 


Signed-off-by: default avatarIlias Apalodimas <ilias.apalodimas@linaro.org>
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source/chapter1-about.rst
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...@@ -68,8 +68,9 @@ Assumptions ...@@ -68,8 +68,9 @@ Assumptions
the firmware as a single entity regardless of the components it comprises. the firmware as a single entity regardless of the components it comprises.
Failing to update one of the components will lead to rollbacks of every affected component Failing to update one of the components will lead to rollbacks of every affected component
- Updating the firmware and the OS at the same time is prohibited. - Updating the firmware and the OS at the same time is prohibited.
- A hardware watchdog must always be active at least in BL33. It's advisable - A hardware watchdog must always be active when Non-secure firmware is
the watchdog is activated on earlier boot stages as well. executing. It's advisable the watchdog is activated on earlier boot stages as well.
The watchdog must reset the board if a timeout occurs.
.. [#UEFICapsuleUpdateNote] [UEFI]_ 2.8B § 23 - Firmware Update and Reporting .. [#UEFICapsuleUpdateNote] [UEFI]_ 2.8B § 23 - Firmware Update and Reporting
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