/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. 

  2.  * Copyright (C) 2008 Michal Simek <monstr@monstr.eu>
    3. 

  3.  * Copyright (C) 2006 Atmark Techno, Inc.
    4. 

  4.  *
    5. 

  5.  * This file is subject to the terms and conditions of the GNU General Public
    6. 

  6.  * License. See the file "COPYING" in the main directory of this archive
    7. 

  7.  * for more details.
    8. 

  8.  */
    9. 

  9. 

  10. #ifndef _ASM_MICROBLAZE_CHECKSUM_H
    11. 

  11. #define _ASM_MICROBLAZE_CHECKSUM_H
    12. 

  12. 

  13. /*
    14. 

  14.  * computes the checksum of the TCP/UDP pseudo-header
    15. 

  15.  * returns a 16-bit checksum, already complemented
    16. 

  16.  */
    17. 

  17. #define csum_tcpudp_nofold	csum_tcpudp_nofold
    18. 

  18. static inline __wsum
    19. 

  19. csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
    20. 

  20. 		   unsigned short proto, __wsum sum)
    21. 

  21. {
    22. 

  22. 	__asm__("add %0, %0, %1\n\t"
    23. 

  23. 		"addc %0, %0, %2\n\t"
    24. 

  24. 		"addc %0, %0, %3\n\t"
    25. 

  25. 		"addc %0, %0, r0\n\t"
    26. 

  26. 		: "+&d" (sum)
    27. 

  27. 		: "d" (saddr), "d" (daddr), "d" (len + proto));
    28. 

  28. 

  29. 	return sum;
    30. 

  30. }
    31. 

  31. 

  32. #include <asm-generic/checksum.h>
    33. 

  33. 

  34. #endif /* _ASM_MICROBLAZE_CHECKSUM_H */
    35.