projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 96cf5185 G |
2 | /* |
| 3 | * linux/arch/unicore32/include/asm/checksum.h | |
| 4 | * | |
| 5 | * Code specific to PKUnity SoC and UniCore ISA | |
| 6 | * | |
| 7 | * Copyright (C) 2001-2010 GUAN Xue-tao | |
| 8 | * | |
| 96cf5185 G |
9 | * IP checksum routines |
| 10 | */ | |
| 11 | #ifndef __UNICORE_CHECKSUM_H__ | |
| 12 | #define __UNICORE_CHECKSUM_H__ | |
| 13 | ||
| 14 | /* | |
| 15 | * computes the checksum of the TCP/UDP pseudo-header | |
| 16 | * returns a 16-bit checksum, already complemented | |
| 17 | */ | |
| 18 | ||
| 19 | static inline __wsum | |
| 01cfbad7 AD |
20 | csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, |
| 21 | __u8 proto, __wsum sum) | |
| 96cf5185 G |
22 | { |
| 23 | __asm__( | |
| 24 | "add.a %0, %1, %2\n" | |
| 25 | "addc.a %0, %0, %3\n" | |
| 26 | "addc.a %0, %0, %4 << #8\n" | |
| 27 | "addc.a %0, %0, %5\n" | |
| 28 | "addc %0, %0, #0\n" | |
| 29 | : "=&r"(sum) | |
| 30 | : "r" (sum), "r" (daddr), "r" (saddr), "r" (len), "Ir" (htons(proto)) | |
| 31 | : "cc"); | |
| 32 | return sum; | |
| 33 | } | |
| 34 | #define csum_tcpudp_nofold csum_tcpudp_nofold | |
| 35 | ||
| 36 | #include <asm-generic/checksum.h> | |
| 37 | ||
| 38 | #endif |