| /* | |
| * linux/arch/unicore32/include/asm/checksum.h | |
| * | |
| * Code specific to PKUnity SoC and UniCore ISA | |
| * | |
| * Copyright (C) 2001-2010 GUAN Xue-tao | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License version 2 as | |
| * published by the Free Software Foundation. | |
| * | |
| * 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 |