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usr/src/linux-headers-5.15.0-142/arch/mips/include/asm/checksum.h��0000644��00000013157�15030102727�0020013 0��ustar�00��/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1995, 96, 97, 98, 99, 2001 by Ralf Baechle * Copyright (C) 1999 Silicon Graphics, Inc. * Copyright (C) 2001 Thiemo Seufer. * Copyright (C) 2002 Maciej W. Rozycki * Copyright (C) 2014 Imagination Technologies Ltd. / #ifndef _ASM_CHECKSUM_H #define _ASM_CHECKSUM_H #ifdef CONFIG_GENERIC_CSUM #include <asm-generic/checksum.h> #else #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); __wsum __csum_partial_copy_from_user(const void __user src, void dst, int len); __wsum __csum_partial_copy_to_user(const void src, void __user dst, int len); #define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER static inline __wsum csum_and_copy_from_user(const void __user src, void dst, int len) { might_fault(); if (!access_ok(src, len)) return 0; return __csum_partial_copy_from_user(src, dst, len); } /* * Copy and checksum to user / #define HAVE_CSUM_COPY_USER static inline __wsum csum_and_copy_to_user(const void src, void __user dst, int len) { might_fault(); if (!access_ok(dst, len)) return 0; return __csum_partial_copy_to_user(src, dst, len); } / * the same as csum_partial, but copies from user space (but on MIPS * we have just one address space, so this is identical to the above) / #define _HAVE_ARCH_CSUM_AND_COPY __wsum __csum_partial_copy_nocheck(const void src, void dst, int len); static inline __wsum csum_partial_copy_nocheck(const void src, void dst, int len) { return __csum_partial_copy_nocheck(src, dst, len); } / * Fold a partial checksum without adding pseudo headers / static inline __sum16 csum_fold(__wsum csum) { u32 sum = (__force u32)csum; sum += (sum << 16); csum = (__force __wsum)(sum < (__force u32)csum); sum >>= 16; sum += (__force u32)csum; return (__force __sum16)~sum; } #define csum_fold csum_fold / * 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. / static inline __sum16 ip_fast_csum(const void iph, unsigned int ihl) { const unsigned int word = iph; const unsigned int stop = word + ihl; unsigned int csum; int carry; csum = word[0]; csum += word[1]; carry = (csum < word[1]); csum += carry; csum += word[2]; carry = (csum < word[2]); csum += carry; csum += word[3]; carry = (csum < word[3]); csum += carry; word += 4; do { csum += word; carry = (csum < word); csum += carry; word++; } while (word != stop); return csum_fold(csum); } #define ip_fast_csum ip_fast_csum static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { unsigned long tmp = (__force unsigned long)sum; __asm__( " .set push # csum_tcpudp_nofold\n" " .set noat \n" #ifdef CONFIG_32BIT " addu %0, %2 \n" " sltu $1, %0, %2 \n" " addu %0, $1 \n" " addu %0, %3 \n" " sltu $1, %0, %3 \n" " addu %0, $1 \n" " addu %0, %4 \n" " sltu $1, %0, %4 \n" " addu %0, $1 \n" #endif #ifdef CONFIG_64BIT " daddu %0, %2 \n" " daddu %0, %3 \n" " daddu %0, %4 \n" " dsll32 $1, %0, 0 \n" " daddu %0, $1 \n" " sltu $1, %0, $1 \n" " dsra32 %0, %0, 0 \n" " addu %0, $1 \n" #endif " .set pop" : "=r" (tmp) : "0" ((__force unsigned long)daddr), "r" ((__force unsigned long)saddr), #ifdef __MIPSEL__ "r" ((proto + len) << 8), #else "r" (proto + len), #endif "r" ((__force unsigned long)sum)); return (__force __wsum)tmp; } #define csum_tcpudp_nofold csum_tcpudp_nofold /* * 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_IPV6_CSUM static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr saddr, const struct in6_addr daddr, __u32 len, __u8 proto, __wsum sum) { __wsum tmp; __asm__( " .set push # csum_ipv6_magic\n" " .set noreorder \n" " .set noat \n" " addu %0, %5 # proto (long in network byte order)\n" " sltu $1, %0, %5 \n" " addu %0, $1 \n" " addu %0, %6 # csum\n" " sltu $1, %0, %6 \n" " lw %1, 0(%2) # four words source address\n" " addu %0, $1 \n" " addu %0, %1 \n" " sltu $1, %0, %1 \n" " lw %1, 4(%2) \n" " addu %0, $1 \n" " addu %0, %1 \n" " sltu $1, %0, %1 \n" " lw %1, 8(%2) \n" " addu %0, $1 \n" " addu %0, %1 \n" " sltu $1, %0, %1 \n" " lw %1, 12(%2) \n" " addu %0, $1 \n" " addu %0, %1 \n" " sltu $1, %0, %1 \n" " lw %1, 0(%3) \n" " addu %0, $1 \n" " addu %0, %1 \n" " sltu $1, %0, %1 \n" " lw %1, 4(%3) \n" " addu %0, $1 \n" " addu %0, %1 \n" " sltu $1, %0, %1 \n" " lw %1, 8(%3) \n" " addu %0, $1 \n" " addu %0, %1 \n" " sltu $1, %0, %1 \n" " lw %1, 12(%3) \n" " addu %0, $1 \n" " addu %0, %1 \n" " sltu $1, %0, %1 \n" " addu %0, $1 # Add final carry\n" " .set pop" : "=&r" (sum), "=&r" (tmp) : "r" (saddr), "r" (daddr), "0" (htonl(len)), "r" (htonl(proto)), "r" (sum) : "memory"); return csum_fold(sum); } #include <asm-generic/checksum.h> #endif /* CONFIG_GENERIC_CSUM / #endif / _ASM_CHECKSUM_H / ��usr/src/linux-headers-5.15.0-133/arch/microblaze/include/asm/checksum.h��0000644��00000001446�15030104225�0021163 0��ustar�00��/ SPDX-License-Identifier: GPL-2.0 / / * Copyright (C) 2008 Michal Simek <monstr@monstr.eu> * Copyright (C) 2006 Atmark Techno, Inc. / #ifndef _ASM_MICROBLAZE_CHECKSUM_H #define _ASM_MICROBLAZE_CHECKSUM_H / * computes the checksum of the TCP/UDP pseudo-header * returns a 16-bit checksum, already complemented / #define csum_tcpudp_nofold csum_tcpudp_nofold static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { __asm__("add %0, %0, %1\n\t" "addc %0, %0, %2\n\t" "addc %0, %0, %3\n\t" "addc %0, %0, r0\n\t" : "+&d" (sum) : "d" (saddr), "d" (daddr), #ifdef __MICROBLAZEEL__ "d" ((len + proto) << 8) #else "d" (len + proto) #endif ); return sum; } #include <asm-generic/checksum.h> #endif / _ASM_MICROBLAZE_CHECKSUM_H / ��usr/src/linux-headers-5.15.0-133/arch/ia64/include/asm/checksum.h��0000644��00000003322�15030104233�0017571 0��ustar�00��/ SPDX-License-Identifier: GPL-2.0 / #ifndef _ASM_IA64_CHECKSUM_H #define _ASM_IA64_CHECKSUM_H / * Modified 1998, 1999 * David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co / / * This is a version of ip_compute_csum() optimized for IP headers, * which always checksum on 4 octet boundaries. / extern __sum16 ip_fast_csum(const void iph, unsigned int ihl); /* * Computes the checksum of the TCP/UDP pseudo-header returns a 16-bit * checksum, already complemented / extern __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum); extern __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum); / * 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 / extern __wsum csum_partial(const void buff, int len, __wsum sum); /* * This routine is used for miscellaneous IP-like checksums, mainly in * icmp.c / extern __sum16 ip_compute_csum(const void buff, int len); /* * Fold a partial checksum without adding pseudo headers. / static inline __sum16 csum_fold(__wsum csum) { u32 sum = (__force u32)csum; sum = (sum & 0xffff) + (sum >> 16); sum = (sum & 0xffff) + (sum >> 16); return (__force __sum16)~sum; } #define _HAVE_ARCH_IPV6_CSUM 1 struct in6_addr; extern __sum16 csum_ipv6_magic(const struct in6_addr saddr, const struct in6_addr daddr, __u32 len, __u8 proto, __wsum csum); #endif / _ASM_IA64_CHECKSUM_H / ��usr/src/linux-headers-5.15.0-133/arch/parisc/include/asm/checksum.h��0000644��00000011153�15030123633�0020315 0��ustar�00��/ SPDX-License-Identifier: GPL-2.0 / #ifndef _PARISC_CHECKSUM_H #define _PARISC_CHECKSUM_H #include <linux/in6.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 / extern __wsum csum_partial(const void , int, __wsum); /* * Optimized for IP headers, which always checksum on 4 octet boundaries. * * Written by Randolph Chung <tausq@debian.org>, and then mucked with by * LaMont Jones <lamont@debian.org> / static inline __sum16 ip_fast_csum(const void iph, unsigned int ihl) { unsigned int sum; unsigned long t0, t1, t2; __asm__ __volatile__ ( " ldws,ma 4(%1), %0\n" " addib,<= -4, %2, 2f\n" "\n" " ldws 4(%1), %4\n" " ldws 8(%1), %5\n" " add %0, %4, %0\n" " ldws,ma 12(%1), %3\n" " addc %0, %5, %0\n" " addc %0, %3, %0\n" "1: ldws,ma 4(%1), %3\n" " addib,> -1, %2, 1b\n" " addc %0, %3, %0\n" "\n" " extru %0, 31, 16, %4\n" " extru %0, 15, 16, %5\n" " addc %4, %5, %0\n" " extru %0, 15, 16, %5\n" " add %0, %5, %0\n" " subi -1, %0, %0\n" "2:\n" : "=r" (sum), "=r" (iph), "=r" (ihl), "=r" (t0), "=r" (t1), "=r" (t2) : "1" (iph), "2" (ihl) : "memory"); return (__force __sum16)sum; } /* * Fold a partial checksum / static inline __sum16 csum_fold(__wsum csum) { u32 sum = (__force u32)csum; / add the swapped two 16-bit halves of sum, a possible carry from adding the two 16-bit halves, will carry from the lower half into the upper half, giving us the correct sum in the upper half. / sum += (sum << 16) + (sum >> 16); return (__force __sum16)(~sum >> 16); } static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { __asm__( " add %1, %0, %0\n" " addc %2, %0, %0\n" " addc %3, %0, %0\n" " addc %%r0, %0, %0\n" : "=r" (sum) : "r" (daddr), "r"(saddr), "r"(proto+len), "0"(sum)); 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)); } / * this routine is used for miscellaneous IP-like checksums, mainly * in icmp.c / static inline __sum16 ip_compute_csum(const void buf, int len) { return csum_fold (csum_partial(buf, len, 0)); } #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) { unsigned long t0, t1, t2, t3; len += proto; /* add 16-bit proto + len / __asm__ __volatile__ ( #if BITS_PER_LONG > 32 / We can execute two loads and two adds per cycle on PA 8000. But add insn's get serialized waiting for the carry bit. ** Try to keep 4 registers with "live" values ahead of the ALU. / " depdi 0, 31, 32, %0\n"/ clear upper half of incoming checksum / " ldd,ma 8(%1), %4\n" / get 1st saddr word / " ldd,ma 8(%2), %5\n" / get 1st daddr word / " add %4, %0, %0\n" " ldd,ma 8(%1), %6\n" / 2nd saddr / " ldd,ma 8(%2), %7\n" / 2nd daddr / " add,dc %5, %0, %0\n" " add,dc %6, %0, %0\n" " add,dc %7, %0, %0\n" " add,dc %3, %0, %0\n" / fold in proto+len \| carry bit / " extrd,u %0, 31, 32, %4\n"/ copy upper half down / " depdi 0, 31, 32, %0\n"/ clear upper half / " add,dc %4, %0, %0\n" / fold into 32-bits, plus carry / " addc 0, %0, %0\n" / add final carry / #else / For PA 1.x, the insn order doesn't matter as much. Insn stream is serialized on the carry bit here too. ** result from the previous operation (eg r0 + x) / " ldw,ma 4(%1), %4\n" / get 1st saddr word / " ldw,ma 4(%2), %5\n" / get 1st daddr word / " add %4, %0, %0\n" " ldw,ma 4(%1), %6\n" / 2nd saddr / " addc %5, %0, %0\n" " ldw,ma 4(%2), %7\n" / 2nd daddr / " addc %6, %0, %0\n" " ldw,ma 4(%1), %4\n" / 3rd saddr / " addc %7, %0, %0\n" " ldw,ma 4(%2), %5\n" / 3rd daddr / " addc %4, %0, %0\n" " ldw,ma 4(%1), %6\n" / 4th saddr / " addc %5, %0, %0\n" " ldw,ma 4(%2), %7\n" / 4th daddr / " addc %6, %0, %0\n" " addc %7, %0, %0\n" " addc %3, %0, %0\n" / fold in proto+len / " addc 0, %0, %0\n" / add carry */ #endif : "=r" (sum), "=r" (saddr), "=r" (daddr), "=r" (len), "=r" (t0), "=r" (t1), "=r" (t2), "=r" (t3) : "0" (sum), "1" (saddr), "2" (daddr), "3" (len) : "memory"); return csum_fold(sum); } #endif ��

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