diff options
| author | Mikael Starvik <mikael.starvik@axis.com> | 2005-07-27 11:44:44 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-27 16:26:01 -0700 |
| commit | 51533b615e605d86154ec1b4e585c8ca1b0b15b7 (patch) | |
| tree | 4a6d7d8494d2017632d83624fb71b36031e0e7e5 /include/asm-cris/arch-v32/checksum.h | |
| parent | 5d01e6ce785884a5db5792cd2e5bb36fa82fe23c (diff) | |
[PATCH] CRIS update: new subarchitecture v32
New CRIS sub architecture named v32.
From: Dave Jones <davej@redhat.com>
Fix swapped kmalloc args
Signed-off-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-cris/arch-v32/checksum.h')
| -rw-r--r-- | include/asm-cris/arch-v32/checksum.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/asm-cris/arch-v32/checksum.h b/include/asm-cris/arch-v32/checksum.h new file mode 100644 index 000000000000..a1d6b2a6cc44 --- /dev/null +++ b/include/asm-cris/arch-v32/checksum.h @@ -0,0 +1,29 @@ +#ifndef _ASM_CRIS_ARCH_CHECKSUM_H +#define _ASM_CRIS_ARCH_CHECKSUM_H + +/* + * Check values used in TCP/UDP headers. + * + * The gain of doing this in assembler instead of C, is that C doesn't + * generate carry-additions for the 32-bit components of the + * checksum. Which means it would be necessary to split all those into + * 16-bit components and then add. + */ +extern inline unsigned int +csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, + unsigned short len, unsigned short proto, unsigned int sum) +{ + int res; + + __asm__ __volatile__ ("add.d %2, %0\n\t" + "addc %3, %0\n\t" + "addc %4, %0\n\t" + "addc 0, %0\n\t" + : "=r" (res) + : "0" (sum), "r" (daddr), "r" (saddr), \ + "r" ((ntohs(len) << 16) + (proto << 8))); + + return res; +} + +#endif /* _ASM_CRIS_ARCH_CHECKSUM_H */ |