| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * linux/arch/unicore32/include/asm/checksum.h |
| * |
| * Code specific to PKUnity SoC and UniCore ISA |
| * |
| * Copyright (C) 2001-2010 GUAN Xue-tao |
| * |
| * IP checksum routines |
| */ |
| #ifndef __UNICORE_CHECKSUM_H__ |
| #define __UNICORE_CHECKSUM_H__ |
| |
| /* |
| * computes the checksum of the TCP/UDP pseudo-header |
| * returns a 16-bit checksum, already complemented |
| */ |
| |
| static inline __wsum |
| csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, |
| __u8 proto, __wsum sum) |
| { |
| __asm__( |
| "add.a %0, %1, %2\n" |
| "addc.a %0, %0, %3\n" |
| "addc.a %0, %0, %4 << #8\n" |
| "addc.a %0, %0, %5\n" |
| "addc %0, %0, #0\n" |
| : "=&r"(sum) |
| : "r" (sum), "r" (daddr), "r" (saddr), "r" (len), "Ir" (htons(proto)) |
| : "cc"); |
| return sum; |
| } |
| #define csum_tcpudp_nofold csum_tcpudp_nofold |
| |
| #include <asm-generic/checksum.h> |
| |
| #endif |
