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SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
copyrights:
- Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
enabled-by: bsps/sparc/leon3
links:
- role: validation
uid: ../req/errata-gr712rc-08
- role: validation
uid: ../req/idle-task-power-down
- role: validation
uid: ../req/idle-task-power-down-errata
method: by-inspection
references:
- identifier: bsps/sparc/leon3/start/bspidle.S
hash: gmJydgDbHmV9_F0Ru0dQ_v78f8_UXwEKnAp5LpQVn98=
type: file
text: |
Inspection of the referenced ${/glossary/sourcecode:/term} file showed that
the ``Workaround 2`` is implemented. Contrary to the recommendation in the
errata workaround description, the stack pointer is used as the source
operand of the load instruction. This is not an issue, since the idle thread
does not use the loaded value. Inspection showed also that an infinite loop
is implemented which uses a write to ``%asr19`` to enter the power-down mode.
The errata workaround is implemented unconditionally since it is harmless and
may be considered a performance optimization. It is some sort of a data
cache prefetch.
type: validation
|
