From: Pierre Gondois <pierre.gondois@arm.com>
A recent patchset [1] allows the generation of _PSD/_CPC ACPI objects by
querying the relevant information through the SCMI protocol.
- The _PSD object describes to which performance domain a CPU belongs.
CPUs in the same performance domain have the same frequency.
- The _CPC object describes an interface to control the performance level
of a CPU (i.e. its frequency).
Demonstrate the _PSD/_CPC generation functionality on Juno-r2 platforms.
In order to work, the SCP must describe performance levels on a unified
scale (i.e. not as frequencies). The following performance level values
where used for testing:
- little CPUs OPPs: [181, 322, 383] * 1000
- big CPUs OPPs: [512, 833, 1024] * 1024
[1] https://edk2.groups.io/g/devel/message/104115
Pierre Gondois (3):
Platform/ARM: Juno: Fix typo
Platform/ARM: Juno: Generate _PSD objects
Platform/ARM: Juno: Generate _CPC objects for JunoR2
.../ConfigurationManager.c | 339 +++++++++++++++++-
.../ConfigurationManager.h | 34 +-
.../ConfigurationManagerDxe.inf | 1 +
3 files changed, 359 insertions(+), 15 deletions(-)
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2.25.1
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