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6e41c585e3
quite a few architectures have the same csum_partial_copy_nocheck() - simply memcpy() the data and then return the csum of the copy. hexagon, parisc, ia64, s390, um: explicitly spelled out that way. arc, arm64, csky, h8300, m68k/nommu, microblaze, mips/GENERIC_CSUM, nds32, nios2, openrisc, riscv, unicore32: end up picking the same thing spelled out in lib/checksum.h (with varying amounts of perversions along the way). everybody else (alpha, arm, c6x, m68k/mmu, mips/!GENERIC_CSUM, powerpc, sh, sparc, x86, xtensa) have non-generic variants. For all except c6x the declaration is in their asm/checksum.h. c6x uses the wrapper from asm-generic/checksum.h that would normally lead to the lib/checksum.h instance, but in case of c6x we end up using an asm function from arch/c6x instead. Screw that mess - have architectures with private instances define _HAVE_ARCH_CSUM_AND_COPY in their asm/checksum.h and have the default one right in net/checksum.h conditional on _HAVE_ARCH_CSUM_AND_COPY *not* defined. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
35 lines
922 B
C
35 lines
922 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2011 Texas Instruments Incorporated
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* Author: Mark Salter <msalter@redhat.com>
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*/
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#ifndef _ASM_C6X_CHECKSUM_H
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#define _ASM_C6X_CHECKSUM_H
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static inline __wsum
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csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len,
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__u8 proto, __wsum sum)
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{
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unsigned long long tmp;
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asm ("add .d1 %1,%5,%1\n"
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"|| addu .l1 %3,%4,%0\n"
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"addu .l1 %2,%0,%0\n"
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#ifndef CONFIG_CPU_BIG_ENDIAN
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"|| shl .s1 %1,8,%1\n"
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#endif
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"addu .l1 %1,%0,%0\n"
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"add .l1 %P0,%p0,%2\n"
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: "=&a"(tmp), "+a"(len), "+a"(sum)
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: "a" (saddr), "a" (daddr), "a" (proto));
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return sum;
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}
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#define csum_tcpudp_nofold csum_tcpudp_nofold
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#define _HAVE_ARCH_CSUM_AND_COPY
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extern __wsum csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum);
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#include <asm-generic/checksum.h>
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#endif /* _ASM_C6X_CHECKSUM_H */
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