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

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Date:   Wed, 15 Mar 2023 18:31:50 +0000
From:   Conor Dooley <conor@...nel.org>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     palmer@...belt.com, linux-riscv@...ts.infradead.org,
        samuel@...lland.org, guoren@...nel.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

On Tue, Feb 28, 2023 at 10:54:34PM +0100, Heiko Stuebner 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>

Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>

> ---
>  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
> 

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