diff options
Diffstat (limited to 'kernel/arch/microblaze/include/asm/checksum.h')
| -rw-r--r-- | kernel/arch/microblaze/include/asm/checksum.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/kernel/arch/microblaze/include/asm/checksum.h b/kernel/arch/microblaze/include/asm/checksum.h new file mode 100644 index 000000000..0185cbefd --- /dev/null +++ b/kernel/arch/microblaze/include/asm/checksum.h @@ -0,0 +1,39 @@ +/* + * Copyright (C) 2008 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#ifndef _ASM_MICROBLAZE_CHECKSUM_H +#define _ASM_MICROBLAZE_CHECKSUM_H + +/* + * computes the checksum of the TCP/UDP pseudo-header + * returns a 16-bit checksum, already complemented + */ +#define csum_tcpudp_nofold csum_tcpudp_nofold +static inline __wsum +csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, + unsigned short proto, __wsum sum) +{ + __asm__("add %0, %0, %1\n\t" + "addc %0, %0, %2\n\t" + "addc %0, %0, %3\n\t" + "addc %0, %0, r0\n\t" + : "+&d" (sum) + : "d" (saddr), "d" (daddr), +#ifdef __MICROBLAZEEL__ + "d" ((len + proto) << 8) +#else + "d" (len + proto) +#endif +); + return sum; +} + +#include <asm-generic/checksum.h> + +#endif /* _ASM_MICROBLAZE_CHECKSUM_H */ |