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

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Message-Id: <20230228215435.3366914-2-heiko@sntech.de>
Date:   Tue, 28 Feb 2023 22:54:34 +0100
From:   Heiko Stuebner <heiko@...ech.de>
To:     palmer@...belt.com
Cc:     linux-riscv@...ts.infradead.org, samuel@...lland.org,
        guoren@...nel.org, christoph.muellner@...ll.eu, heiko@...ech.de,
        conor.dooley@...rochip.com, linux-kernel@...r.kernel.org,
        Heiko Stuebner <heiko.stuebner@...ll.eu>
Subject: [PATCH RFC 1/2] RISC-V: define the elements of the VCSR vector CSR

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