1/* 2 * Copyright (c) 2017-2021 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29/* 30 * extern uint32_t os_cpu_in_cksum(const void *data, uint32_t len, 31 * uint32_t initial_sum); 32 * 33 * input : 34 * data : starting address 35 * len : byte stream length 36 * initial_sum : 32-bit sum 37 * 38 * output : 39 * This function returns the partial 16-bit checksum accumulated in 40 * a 32-bit variable (withouth 1's complement); caller is responsible 41 * for folding the 32-bit sum into 16-bit and performinng the 1's 42 * complement if applicable 43 */ 44 45#if defined(__arm64__) 46#include "../../../bsd/dev/arm64/cpu_in_cksum.s" 47#elif defined(__arm__) 48#include "../../../bsd/dev/arm/cpu_in_cksum.s" 49#elif defined(__i386__) || defined(__x86_64__) 50/* This is dealt with by the reference C code */ 51#else 52#error "Unsupported architecture" 53#endif 54