Unverified Commit e9f9946c authored by Clément Léger's avatar Clément Léger Committed by Palmer Dabbelt
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dt-bindings: riscv: add Zca, Zcf, Zcd and Zcb ISA extension description 



Add description for Zca, Zcf, Zcd and Zcb extensions which are part the
Zc* standard extensions for code size reduction. Additional validation
rules are added since Zcb depends on Zca, Zcf, depends on Zca and F, Zcd
depends on Zca and D and finally, Zcf can not be present on rv64.

Signed-off-by: default avatarClément Léger <cleger@rivosinc.com>
Reviewed-by: default avatarConor Dooley <conor.dooley@microchip.com>
Reviewed-by: default avatarCharlie Jenkins <charlie@rivosinc.com>
Link: https://lore.kernel.org/r/20240619113529.676940-7-cleger@rivosinc.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent ca544640

Documentation/devicetree/bindings/riscv/extensions.yaml

+78 −0
Original line number Diff line number Diff line
@@ -220,6 +220,38 @@ properties: 
            instructions as ratified at commit 6d33919 ("Merge pull request #158

            from hirooih/clmul-fix-loop-end-condition") of riscv-bitmanip.



        - const: zca

          description: |

            The Zca extension part of Zc* standard extensions for code size

            reduction, as ratified in commit 8be3419c1c0 ("Zcf doesn't exist on

            RV64 as it contains no instructions") of riscv-code-size-reduction,

            merged in the riscv-isa-manual by commit dbc79cf28a2 ("Initial seed

            of zc.adoc to src tree.").



        - const: zcb

          description: |

            The Zcb extension part of Zc* standard extensions for code size

            reduction, as ratified in commit 8be3419c1c0 ("Zcf doesn't exist on

            RV64 as it contains no instructions") of riscv-code-size-reduction,

            merged in the riscv-isa-manual by commit dbc79cf28a2 ("Initial seed

            of zc.adoc to src tree.").



        - const: zcd

          description: |

            The Zcd extension part of Zc* standard extensions for code size

            reduction, as ratified in commit 8be3419c1c0 ("Zcf doesn't exist on

            RV64 as it contains no instructions") of riscv-code-size-reduction,

            merged in the riscv-isa-manual by commit dbc79cf28a2 ("Initial seed

            of zc.adoc to src tree.").



        - const: zcf

          description: |

            The Zcf extension part of Zc* standard extensions for code size

            reduction, as ratified in commit 8be3419c1c0 ("Zcf doesn't exist on

            RV64 as it contains no instructions") of riscv-code-size-reduction,

            merged in the riscv-isa-manual by commit dbc79cf28a2 ("Initial seed

            of zc.adoc to src tree.").



        - const: zfa

          description:

            The standard Zfa extension for additional floating point
@@ -519,5 +551,51 @@ properties: 
            Registers in the AX45MP datasheet.

            https://www.andestech.com/wp-content/uploads/AX45MP-1C-Rev.-5.0.0-Datasheet.pdf



    allOf:

      # Zcb depends on Zca

      - if:

          contains:

            const: zcb

        then:

          contains:

            const: zca

      # Zcd depends on Zca and D

      - if:

          contains:

            const: zcd

        then:

          allOf:

            - contains:

                const: zca

            - contains:

                const: d

      # Zcf depends on Zca and F

      - if:

          contains:

            const: zcf

        then:

          allOf:

            - contains:

                const: zca

            - contains:

                const: f



allOf:

  # Zcf extension does not exist on rv64

  - if:

      properties:

        riscv,isa-extensions:

          contains:

            const: zcf

        riscv,isa-base:

          contains:

            const: rv64i

    then:

      properties:

        riscv,isa-extensions:

          not:

            contains:

              const: zcf



additionalProperties: true

...