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Diffstat (limited to 'include/asm-h8300/checksum.h')
-rw-r--r-- | include/asm-h8300/checksum.h | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/include/asm-h8300/checksum.h b/include/asm-h8300/checksum.h deleted file mode 100644 index 98724e1..0000000 --- a/include/asm-h8300/checksum.h +++ /dev/null @@ -1,102 +0,0 @@ -#ifndef _H8300_CHECKSUM_H -#define _H8300_CHECKSUM_H - -/* - * computes the checksum of a memory block at buff, length len, - * and adds in "sum" (32-bit) - * - * returns a 32-bit number suitable for feeding into itself - * or csum_tcpudp_magic - * - * this function must be called with even lengths, except - * for the last fragment, which may be odd - * - * it's best to have buff aligned on a 32-bit boundary - */ -__wsum csum_partial(const void *buff, int len, __wsum sum); - -/* - * the same as csum_partial, but copies from src while it - * checksums - * - * here even more important to align src and dst on a 32-bit (or even - * better 64-bit) boundary - */ - -__wsum csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum); - - -/* - * the same as csum_partial_copy, but copies from user space. - * - * here even more important to align src and dst on a 32-bit (or even - * better 64-bit) boundary - */ - -extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst, - int len, __wsum sum, int *csum_err); - -__sum16 ip_fast_csum(const void *iph, unsigned int ihl); - - -/* - * Fold a partial checksum - */ - -static inline __sum16 csum_fold(__wsum sum) -{ - __asm__("mov.l %0,er0\n\t" - "add.w e0,r0\n\t" - "xor.w e0,e0\n\t" - "rotxl.w e0\n\t" - "add.w e0,r0\n\t" - "sub.w e0,e0\n\t" - "mov.l er0,%0" - : "=r"(sum) - : "0"(sum) - : "er0"); - return (__force __sum16)~sum; -} - - -/* - * 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) -{ - __asm__ ("sub.l er0,er0\n\t" - "add.l %2,%0\n\t" - "addx #0,r0l\n\t" - "add.l %3,%0\n\t" - "addx #0,r0l\n\t" - "add.l %4,%0\n\t" - "addx #0,r0l\n\t" - "add.l er0,%0\n\t" - "bcc 1f\n\t" - "inc.l #1,%0\n" - "1:" - : "=&r" (sum) - : "0" (sum), "r" (daddr), "r" (saddr), "r" (len + proto) - :"er0"); - return sum; -} - -static inline __sum16 -csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len, - unsigned short proto, __wsum sum) -{ - return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum)); -} - -/* - * this routine is used for miscellaneous IP-like checksums, mainly - * in icmp.c - */ - -extern __sum16 ip_compute_csum(const void *buff, int len); - -#endif /* _H8300_CHECKSUM_H */ |