[v1] RISC-V: T-Head vector handling

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

Posted by Heiko Stuebner 3 years, 1 month ago

From: Heiko Stuebner <heiko.stuebner@vrull.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@vrull.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

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

Posted by Conor Dooley 3 years ago

On Tue, Feb 28, 2023 at 10:54:34PM +0100, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner@vrull.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@vrull.eu>

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

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

Posted by Guo Ren 3 years, 1 month ago

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

On Wed, Mar 1, 2023 at 5:54 AM Heiko Stuebner <heiko@sntech.de> wrote:
>
> From: Heiko Stuebner <heiko.stuebner@vrull.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@vrull.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