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Deprecate spin tables #129

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Jul 1, 2024
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Deprecate spin tables #129

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15 changes: 4 additions & 11 deletions source/chapter3-secureworld.rst
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Expand Up @@ -22,18 +22,11 @@ On AArch64 platforms, Firmware resident in Trustzone EL3 must implement and
conform to the Power State Coordination Interface specification [PSCI]_ and to
the SMC Calling Convention [SMCCC]_.

Platforms without EL3 must implement one of:
Platforms without EL3 must implement PSCI and SMCCC at EL2 (leaving only EL1
available to an operating system).

- PSCI and SMCCC at EL2 (leaving only EL1 available to an operating system)
- Linux AArch64 spin tables [LINUXA64BOOT]_ (Devicetree only)

.. warning:: The spin table protocol is strongly discouraged.
Future versions of this specification will only allow PSCI and SMCCC, and
they should be implemented in all new designs.

It is recommended that firmware implementing PSCI supports version 1.0 or later
[#PSCINote]_ and that firmware implementing SMCCC supports version 1.1 or later
[#SMCCCNote]_.
It is recommended that firmware implements PSCI version 1.0 or later
[#PSCINote]_ and SMCCC version 1.1 or later [#SMCCCNote]_.

.. [#PSCINote] PSCI version 1.0 is considered as an errata fix release for
version 0.2, where functions interfaces have been stabilized.
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4 changes: 0 additions & 4 deletions source/references.rst
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Expand Up @@ -25,10 +25,6 @@ Bibliography
<https://github.com/devicetree-org/devicetree-specification/releases/tag/v0.4>`_,
`Devicetree.org <https://www.devicetree.org/>`_

.. [LINUXA64BOOT] `Linux Documentation/arm64/booting.rst
<https://docs.kernel.org/arch/arm64/booting.html>`_,
Linux kernel

.. [PSCI] `Arm Power State Coordination Interface issue F (PSCI v1.3 ALPHA).
<https://developer.arm.com/documentation/den0022/f>`_
July 2023, `Arm Limited <https://www.arm.com/>`_
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