| /* |
| * Copyright 2004-2009 Analog Devices Inc. |
| * akbar.hussain@lineo.com |
| * |
| * Licensed under the GPL-2 or later. |
| */ |
| |
| #ifndef _BFIN_CHECKSUM_H |
| #define _BFIN_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) |
| { |
| unsigned int carry; |
| |
| __asm__ ("%0 = %0 + %2;\n\t" |
| "CC = AC0;\n\t" |
| "%1 = CC;\n\t" |
| "%0 = %0 + %1;\n\t" |
| "%0 = %0 + %3;\n\t" |
| "CC = AC0;\n\t" |
| "%1 = CC;\n\t" |
| "%0 = %0 + %1;\n\t" |
| "%0 = %0 + %4;\n\t" |
| "CC = AC0;\n\t" |
| "%1 = CC;\n\t" |
| "%0 = %0 + %1;\n\t" |
| : "=d" (sum), "=&d" (carry) |
| : "d" (daddr), "d" (saddr), "d" ((len + proto) << 8), "0"(sum) |
| : "CC"); |
| |
| return (sum); |
| } |
| #define csum_tcpudp_nofold __csum_tcpudp_nofold |
| |
| #include <asm-generic/checksum.h> |
| |
| #endif |
