1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2008 Michal Simek <monstr@monstr.eu> 4 * Copyright (C) 2006 Atmark Techno, Inc. 5 */ 6 7 #ifndef _ASM_MICROBLAZE_CHECKSUM_H 8 #define _ASM_MICROBLAZE_CHECKSUM_H 9 10 /* 11 * computes the checksum of the TCP/UDP pseudo-header 12 * returns a 16-bit checksum, already complemented 13 */ 14 #define csum_tcpudp_nofold csum_tcpudp_nofold 15 static inline __wsum 16 csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, 17 __u8 proto, __wsum sum) 18 { 19 __asm__("add %0, %0, %1\n\t" 20 "addc %0, %0, %2\n\t" 21 "addc %0, %0, %3\n\t" 22 "addc %0, %0, r0\n\t" 23 : "+&d" (sum) 24 : "d" (saddr), "d" (daddr), 25 #ifdef __MICROBLAZEEL__ 26 "d" ((len + proto) << 8) 27 #else 28 "d" (len + proto) 29 #endif 30 ); 31 return sum; 32 } 33 34 #include <asm-generic/checksum.h> 35 36 #endif /* _ASM_MICROBLAZE_CHECKSUM_H */ 37