diff options
| author | Yuval Adam <_@yuv.al> | 2017-08-30 08:25:59 +0000 |
|---|---|---|
| committer | Yuval Adam <_@yuv.al> | 2017-08-30 08:25:59 +0000 |
| commit | 8e4bff4cab0ddac6060645b0715210484d02ff40 (patch) | |
| tree | 3a5c3024371a04692a3a6d9974d001cdff8ebf84 /arch/unicore32/include/asm/checksum.h | |
Diffstat (limited to 'arch/unicore32/include/asm/checksum.h')
| -rw-r--r-- | arch/unicore32/include/asm/checksum.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/checksum.h b/arch/unicore32/include/asm/checksum.h new file mode 100644 index 00000000..f55c3f93 --- /dev/null +++ b/arch/unicore32/include/asm/checksum.h @@ -0,0 +1,41 @@ +/* + * 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 |