[PATCH v5 06/16] dt-bindings: riscv: add Zca, Zcf, Zcd and Zcb ISA extension description

[Charlie Jenkins]

On Fri, May 17, 2024 at 04:52:46PM +0200, Clément Léger wrote:
> 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: Clément Léger <cleger at rivosinc.com>
> Reviewed-by: Conor Dooley <conor.dooley at microchip.com>
> ---
>  .../devicetree/bindings/riscv/extensions.yaml | 78 +++++++++++++++++++
>  1 file changed, 78 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
> index b9100addeb90..39084c58d4e4 100644
> --- a/Documentation/devicetree/bindings/riscv/extensions.yaml
> +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
> @@ -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
> @@ -499,5 +531,51 @@ properties:
>              The T-HEAD specific 0.7.1 vector implementation as written in
>              https://github.com/T-head-Semi/thead-extension-spec/blob/95358cb2cca9489361c61d335e03d3134b14133f/xtheadvector.adoc.
>  
> +    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
>  ...
> -- 
> 2.43.0
> 
> 
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Reviewed-by: Charlie Jenkins <charlie at rivosinc.com>