From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- arch/csky/include/asm/checksum.h | 50 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 arch/csky/include/asm/checksum.h (limited to 'arch/csky/include/asm/checksum.h') diff --git a/arch/csky/include/asm/checksum.h b/arch/csky/include/asm/checksum.h new file mode 100644 index 000000000..768582429 --- /dev/null +++ b/arch/csky/include/asm/checksum.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. + +#ifndef __ASM_CSKY_CHECKSUM_H +#define __ASM_CSKY_CHECKSUM_H + +#include +#include + +static inline __sum16 csum_fold(__wsum csum) +{ + u32 tmp; + + asm volatile( + "mov %1, %0\n" + "rori %0, 16\n" + "addu %0, %1\n" + "lsri %0, 16\n" + : "=r"(csum), "=r"(tmp) + : "0"(csum)); + + return (__force __sum16) ~csum; +} +#define csum_fold csum_fold + +static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, + unsigned short len, unsigned short proto, __wsum sum) +{ + asm volatile( + "clrc\n" + "addc %0, %1\n" + "addc %0, %2\n" + "addc %0, %3\n" + "inct %0\n" + : "=r"(sum) + : "r"((__force u32)saddr), "r"((__force u32)daddr), +#ifdef __BIG_ENDIAN + "r"(proto + len), +#else + "r"((proto + len) << 8), +#endif + "0" ((__force unsigned long)sum) + : "cc"); + return sum; +} +#define csum_tcpudp_nofold csum_tcpudp_nofold + +#include + +#endif /* __ASM_CSKY_CHECKSUM_H */ -- cgit v1.2.3