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usr/src/linux-headers-5.15.0-142/arch/sparc/include/asm/checksum_64.h��0000644��00000007417�15030447016�0020471 0��ustar�00��/* SPDX-License-Identifier: GPL-2.0 / #ifndef __SPARC64_CHECKSUM_H #define __SPARC64_CHECKSUM_H / checksum.h: IP/UDP/TCP checksum routines on the V9. * * Copyright(C) 1995 Linus Torvalds * Copyright(C) 1995 Miguel de Icaza * Copyright(C) 1996 David S. Miller * Copyright(C) 1996 Eddie C. Dost * Copyright(C) 1997 Jakub Jelinek * * derived from: * Alpha checksum c-code * ix86 inline assembly * RFC1071 Computing the Internet Checksum / #include <linux/in6.h> #include <linux/uaccess.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 user space 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 csum_and_copy_from_user(const void __user src, void dst, int len); __wsum csum_and_copy_to_user(const void src, void __user dst, int len); / ihl is always 5 or greater, almost always is 5, and iph is word aligned * the majority of the time. / __sum16 ip_fast_csum(const void iph, unsigned int ihl); /* Fold a partial checksum without adding pseudo headers. / static inline __sum16 csum_fold(__wsum sum) { unsigned int tmp; __asm__ __volatile__( " addcc %0, %1, %1\n" " srl %1, 16, %1\n" " addc %1, %%g0, %1\n" " xnor %%g0, %1, %0\n" : "=&r" (sum), "=r" (tmp) : "0" (sum), "1" ((__force u32)sum<<16) : "cc"); return (__force __sum16)sum; } static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { __asm__ __volatile__( " addcc %1, %0, %0\n" " addccc %2, %0, %0\n" " addccc %3, %0, %0\n" " addc %0, %%g0, %0\n" : "=r" (sum), "=r" (saddr) : "r" (daddr), "r" (proto + len), "0" (sum), "1" (saddr) : "cc"); return sum; } / * computes the checksum of the TCP/UDP pseudo-header * returns a 16-bit checksum, already complemented / static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum)); } #define _HAVE_ARCH_IPV6_CSUM static inline __sum16 csum_ipv6_magic(const struct in6_addr saddr, const struct in6_addr daddr, __u32 len, __u8 proto, __wsum sum) { __asm__ __volatile__ ( " addcc %3, %4, %%g7\n" " addccc %5, %%g7, %%g7\n" " lduw [%2 + 0x0c], %%g2\n" " lduw [%2 + 0x08], %%g3\n" " addccc %%g2, %%g7, %%g7\n" " lduw [%2 + 0x04], %%g2\n" " addccc %%g3, %%g7, %%g7\n" " lduw [%2 + 0x00], %%g3\n" " addccc %%g2, %%g7, %%g7\n" " lduw [%1 + 0x0c], %%g2\n" " addccc %%g3, %%g7, %%g7\n" " lduw [%1 + 0x08], %%g3\n" " addccc %%g2, %%g7, %%g7\n" " lduw [%1 + 0x04], %%g2\n" " addccc %%g3, %%g7, %%g7\n" " lduw [%1 + 0x00], %%g3\n" " addccc %%g2, %%g7, %%g7\n" " addccc %%g3, %%g7, %0\n" " addc 0, %0, %0\n" : "=&r" (sum) : "r" (saddr), "r" (daddr), "r"(htonl(len)), "r"(htonl(proto)), "r"(sum) : "g2", "g3", "g7", "cc"); return csum_fold(sum); } / this routine is used for miscellaneous IP-like checksums, mainly in icmp.c / static inline __sum16 ip_compute_csum(const void buff, int len) { return csum_fold(csum_partial(buff, len, 0)); } #define HAVE_ARCH_CSUM_ADD static inline __wsum csum_add(__wsum csum, __wsum addend) { __asm__ __volatile__( "addcc %0, %1, %0\n" "addx %0, %%g0, %0" : "=r" (csum) : "r" (addend), "0" (csum)); return csum; } #endif /* !(__SPARC64_CHECKSUM_H) / ��usr/src/linux-headers-5.15.0-133/arch/x86/include/asm/checksum_64.h��0000644��00000012054�15030567504�0020004 0��ustar�00��/ SPDX-License-Identifier: GPL-2.0 / #ifndef _ASM_X86_CHECKSUM_64_H #define _ASM_X86_CHECKSUM_64_H / * Checksums for x86-64 * Copyright 2002 by Andi Kleen, SuSE Labs * with some code from asm-x86/checksum.h / #include <linux/compiler.h> #include <linux/uaccess.h> #include <asm/byteorder.h> /* * csum_fold - Fold and invert a 32bit checksum. * sum: 32bit unfolded sum * * Fold a 32bit running checksum to 16bit and invert it. This is usually * the last step before putting a checksum into a packet. * Make sure not to mix with 64bit checksums. / static inline __sum16 csum_fold(__wsum sum) { asm(" addl %1,%0\n" " adcl $0xffff,%0" : "=r" (sum) : "r" ((__force u32)sum << 16), "0" ((__force u32)sum & 0xffff0000)); return (__force __sum16)(~(__force u32)sum >> 16); } / * This is a version of ip_compute_csum() optimized for IP headers, * which always checksum on 4 octet boundaries. * * By Jorge Cwik <jorge@laser.satlink.net>, adapted for linux by * Arnt Gulbrandsen. / /* * ip_fast_csum - Compute the IPv4 header checksum efficiently. * iph: ipv4 header * ihl: length of header / 4 / static inline __sum16 ip_fast_csum(const void iph, unsigned int ihl) { unsigned int sum; asm(" movl (%1), %0\n" " subl $4, %2\n" " jbe 2f\n" " addl 4(%1), %0\n" " adcl 8(%1), %0\n" " adcl 12(%1), %0\n" "1: adcl 16(%1), %0\n" " lea 4(%1), %1\n" " decl %2\n" " jne 1b\n" " adcl $0, %0\n" " movl %0, %2\n" " shrl $16, %0\n" " addw %w2, %w0\n" " adcl $0, %0\n" " notl %0\n" "2:" /* Since the input registers which are loaded with iph and ihl are modified, we must also specify them as outputs, or gcc will assume they contain their original values. / : "=r" (sum), "=r" (iph), "=r" (ihl) : "1" (iph), "2" (ihl) : "memory"); return (__force __sum16)sum; } /* * csum_tcpup_nofold - Compute an IPv4 pseudo header checksum. * @saddr: source address * @daddr: destination address * @len: length of packet * @proto: ip protocol of packet * @sum: initial sum to be added in (32bit unfolded) * * Returns the pseudo header checksum the input data. Result is * 32bit unfolded. / static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { asm(" addl %1, %0\n" " adcl %2, %0\n" " adcl %3, %0\n" " adcl $0, %0\n" : "=r" (sum) : "g" (daddr), "g" (saddr), "g" ((len + proto)<<8), "0" (sum)); return sum; } /* * csum_tcpup_magic - Compute an IPv4 pseudo header checksum. * @saddr: source address * @daddr: destination address * @len: length of packet * @proto: ip protocol of packet * @sum: initial sum to be added in (32bit unfolded) * * Returns the 16bit pseudo header checksum the input data already * complemented and ready to be filled in. / static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum)); } /* * csum_partial - Compute an internet checksum. * @buff: buffer to be checksummed * @len: length of buffer. * @sum: initial sum to be added in (32bit unfolded) * * Returns the 32bit unfolded internet checksum of the buffer. * Before filling it in it needs to be csum_fold()'ed. * buff should be aligned to a 64bit boundary if possible. / extern __wsum csum_partial(const void buff, int len, __wsum sum); /* Do not call this directly. Use the wrappers below / extern __visible __wsum csum_partial_copy_generic(const void src, void dst, int len); extern __wsum csum_and_copy_from_user(const void __user src, void dst, int len); extern __wsum csum_and_copy_to_user(const void src, void __user dst, int len); extern __wsum csum_partial_copy_nocheck(const void src, void dst, int len); /* * ip_compute_csum - Compute an 16bit IP checksum. * @buff: buffer address. * @len: length of buffer. * * Returns the 16bit folded/inverted checksum of the passed buffer. * Ready to fill in. / extern __sum16 ip_compute_csum(const void buff, int len); /** * csum_ipv6_magic - Compute checksum of an IPv6 pseudo header. * @saddr: source address * @daddr: destination address * @len: length of packet * @proto: protocol of packet * @sum: initial sum (32bit unfolded) to be added in * * Computes an IPv6 pseudo header checksum. This sum is added the checksum * into UDP/TCP packets and contains some link layer information. * Returns the unfolded 32bit checksum. / struct in6_addr; #define _HAVE_ARCH_IPV6_CSUM 1 extern __sum16 csum_ipv6_magic(const struct in6_addr saddr, const struct in6_addr daddr, __u32 len, __u8 proto, __wsum sum); static inline unsigned add32_with_carry(unsigned a, unsigned b) { asm("addl %2,%0\n\t" "adcl $0,%0" : "=r" (a) : "0" (a), "rm" (b)); return a; } #define HAVE_ARCH_CSUM_ADD static inline __wsum csum_add(__wsum csum, __wsum addend) { return (__force __wsum)add32_with_carry((__force unsigned)csum, (__force unsigned)addend); } #endif / _ASM_X86_CHECKSUM_64_H */ ��

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