/arch/microblaze/include/asm/checksum.h

https://bitbucket.org/cresqo/cm7-p500-kernel · C Header · 34 lines · 17 code · 5 blank · 12 comment · 0 complexity · 2bbad156e2a444c333983837d107ca4b MD5 · raw file

  1. /*
  2. * Copyright (C) 2008 Michal Simek <monstr@monstr.eu>
  3. * Copyright (C) 2006 Atmark Techno, Inc.
  4. *
  5. * This file is subject to the terms and conditions of the GNU General Public
  6. * License. See the file "COPYING" in the main directory of this archive
  7. * for more details.
  8. */
  9. #ifndef _ASM_MICROBLAZE_CHECKSUM_H
  10. #define _ASM_MICROBLAZE_CHECKSUM_H
  11. /*
  12. * computes the checksum of the TCP/UDP pseudo-header
  13. * returns a 16-bit checksum, already complemented
  14. */
  15. #define csum_tcpudp_nofold csum_tcpudp_nofold
  16. static inline __wsum
  17. csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
  18. unsigned short proto, __wsum sum)
  19. {
  20. __asm__("add %0, %0, %1\n\t"
  21. "addc %0, %0, %2\n\t"
  22. "addc %0, %0, %3\n\t"
  23. "addc %0, %0, r0\n\t"
  24. : "+&d" (sum)
  25. : "d" (saddr), "d" (daddr), "d" (len + proto));
  26. return sum;
  27. }
  28. #include <asm-generic/checksum.h>
  29. #endif /* _ASM_MICROBLAZE_CHECKSUM_H */