forked from Minki/linux
42 lines
997 B
C
42 lines
997 B
C
|
/*
|
||
|
|
* 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
|