b920de1b77
Add architecture support for the MN10300/AM33 CPUs produced by MEI to the kernel. This patch also adds board support for the ASB2303 with the ASB2308 daughter board, and the ASB2305. The only processor supported is the MN103E010, which is an AM33v2 core plus on-chip devices. [akpm@linux-foundation.org: nuke cvs control strings] Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com> Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
/* MN10300 Optimised checksumming code
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#ifndef _ASM_CHECKSUM_H
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#define _ASM_CHECKSUM_H
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extern __wsum csum_partial(const void *buff, int len, __wsum sum);
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extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
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int len, __wsum sum);
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extern __wsum csum_partial_copy_from_user(const void *src, void *dst,
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int len, __wsum sum,
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int *err_ptr);
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extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
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extern __wsum csum_partial(const void *buff, int len, __wsum sum);
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extern __sum16 ip_compute_csum(const void *buff, int len);
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#define csum_partial_copy_fromuser csum_partial_copy
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extern __wsum csum_partial_copy(const void *src, void *dst, int len,
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__wsum sum);
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static inline __sum16 csum_fold(__wsum sum)
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{
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asm(
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" add %1,%0 \n"
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" addc 0xffff,%0 \n"
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: "=r" (sum)
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: "r" (sum << 16), "0" (sum & 0xffff0000)
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: "cc"
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);
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return (~sum) >> 16;
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}
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static inline __wsum csum_tcpudp_nofold(unsigned long saddr,
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unsigned long daddr,
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unsigned short len,
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unsigned short proto,
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__wsum sum)
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{
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__wsum tmp;
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tmp = (__wsum) ntohs(len) << 16;
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tmp += (__wsum) proto << 8;
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asm(
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" add %1,%0 \n"
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" addc %2,%0 \n"
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" addc %3,%0 \n"
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" addc 0,%0 \n"
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: "=r" (sum)
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: "r" (daddr), "r"(saddr), "r"(tmp), "0"(sum)
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: "cc"
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);
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return sum;
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}
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/*
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* computes the checksum of the TCP/UDP pseudo-header
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* returns a 16-bit checksum, already complemented
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*/
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static inline __sum16 csum_tcpudp_magic(unsigned long saddr,
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unsigned long daddr,
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unsigned short len,
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unsigned short proto,
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__wsum sum)
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{
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return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
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}
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#undef _HAVE_ARCH_IPV6_CSUM
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/*
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* Copy and checksum to user
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*/
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#define HAVE_CSUM_COPY_USER
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extern __wsum csum_and_copy_to_user(const void *src, void *dst, int len,
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__wsum sum, int *err_ptr);
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#endif /* _ASM_CHECKSUM_H */
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