| 1234567891011121314151617181920212223242526272829303132333435363738394041 |
- /*
- * 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, unsigned short len,
- unsigned short 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
|
