linux-kernel - Re: [PATCH RFC 1/2] RISC-V: define the elements of the VCSR vector CSR

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Date:   Wed, 1 Mar 2023 10:22:07 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     palmer@...belt.com, linux-riscv@...ts.infradead.org,
        samuel@...lland.org, christoph.muellner@...ll.eu,
        conor.dooley@...rochip.com, linux-kernel@...r.kernel.org,
        Heiko Stuebner <heiko.stuebner@...ll.eu>
Subject: Re: [PATCH RFC 1/2] RISC-V: define the elements of the VCSR vector CSR

Acked-by: Guo Ren <guoren@...nel.org>

On Wed, Mar 1, 2023 at 5:54 AM Heiko Stuebner <heiko@...ech.de> wrote:
>
> From: Heiko Stuebner <heiko.stuebner@...ll.eu>
>
> The VCSR CSR contains two elements VXRM[2:1] and VXSAT[0].
>
> Define constants for those to access the elements in a readable way.
>
> Signed-off-by: Heiko Stuebner <heiko.stuebner@...ll.eu>
> ---
>  arch/riscv/include/asm/csr.h | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
> index add51662b7c3..8b06f2472915 100644
> --- a/arch/riscv/include/asm/csr.h
> +++ b/arch/riscv/include/asm/csr.h
> @@ -176,6 +176,11 @@
>  #define ENVCFG_CBIE_INV                        _AC(0x3, UL)
>  #define ENVCFG_FIOM                    _AC(0x1, UL)
>
> +/* VCSR flags */
> +#define VCSR_VXRM_MASK                 3
> +#define VCSR_VXRM_SHIFT                        1
> +#define VCSR_VXSAT_MASK                        1
> +
>  /* symbolic CSR names: */
>  #define CSR_CYCLE              0xc00
>  #define CSR_TIME               0xc01
> --
> 2.39.0
>


-- 
Best Regards
 Guo Ren