diff options
Diffstat (limited to 'cpukit/libnetworking/machine/in_cksum.h')
| -rw-r--r-- | cpukit/libnetworking/machine/in_cksum.h | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/cpukit/libnetworking/machine/in_cksum.h b/cpukit/libnetworking/machine/in_cksum.h deleted file mode 100644 index 67dafb644c..0000000000 --- a/cpukit/libnetworking/machine/in_cksum.h +++ /dev/null @@ -1,295 +0,0 @@ -/* - * Nios II version by Jeffrey O. Hill - * - * Copyright 2012. Los Alamos National Security, LLC. - * The Nios II specific part was produced under U.S. Government contract - * DE-AC52-06NA25396 for Los Alamos National Laboratory (LANL), - * which is operated by Los Alamos National Security, LLC for - * the U.S. Department of Energy. The U.S. Government has rights - * to use, reproduce, and distribute this software. NEITHER THE - * GOVERNMENT NOR LOS ALAMOS NATIONAL SECURITY, LLC MAKES ANY - * WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LIABILITY FOR - * THE USE OF THIS SOFTWARE. - * - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * from tahoe: in_cksum.c 1.2 86/01/05 - * from: @(#)in_cksum.c 1.3 (Berkeley) 1/19/91 - * from: Id: in_cksum.c,v 1.8 1995/12/03 18:35:19 bde Exp - */ - -#ifndef _MACHINE_IN_CKSUM_H_ -#define _MACHINE_IN_CKSUM_H_ 1 - -#include <sys/cdefs.h> -#include <netinet/ip.h> /* struct ip */ - -/* - * It it useful to have an Internet checksum routine which is inlineable - * and optimized specifically for the task of computing IP header checksums - * in the normal case (where there are no options and the header length is - * therefore always exactly five 32-bit words. - */ - -/* - * Optimized version for the i386 family - */ - -#if (defined(__GNUC__) && defined(__i386__)) - -static __inline u_int -in_cksum_hdr(const struct ip *ip) -{ - register u_int sum = ((const uint32_t*)ip)[0]; - register u_int tmp; - - __asm__ __volatile__( - " addl %2, %0 \n" - " adcl %3, %0 \n" - " adcl %4, %0 \n" - " adcl %5, %0 \n" - " adcl $0, %0 \n" - " movl %0, %1 \n" - " roll $16, %0 \n" - " addl %1, %0 \n" - :"+&r"(sum),"=&r"(tmp) - :"g"(((const uint32_t*)ip)[1]), - "g"(((const uint32_t*)ip)[2]), - "g"(((const uint32_t*)ip)[3]), - "g"(((const uint32_t*)ip)[4]), - "m"(*ip) - :"cc" - ); - - return (~sum) >>16; -} - -static __inline void -in_cksum_update(struct ip *ip) -{ - int __tmpsum; - __tmpsum = (int)ntohs(ip->ip_sum) + 256; - ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); -} - -/* - * Optimized version for the MC68xxx and Coldfire families - */ - -#elif (defined(__GNUC__) && (defined(__mc68000__) || defined(__m68k__))) - -static __inline__ u_int -in_cksum_hdr(const struct ip *ip) -{ - register u_int *ap = (u_int *)ip; - register u_int sum = *ap++; - register u_int tmp; - - __asm__ __volatile__("addl %2@+,%0\n\t" - "movel %2@+,%1\n\t" - "addxl %1,%0\n\t" - "movel %2@+,%1\n\t" - "addxl %1,%0\n\t" - "movel %2@,%1\n\t" - "addxl %1,%0\n\t" - "moveq #0,%1\n\t" - "addxl %1,%0\n" : - "=d" (sum), "=d" (tmp), "=a" (ap) : - "0" (sum), "2" (ap), "m"(*ip)); - sum = (sum & 0xffff) + (sum >> 16); - if (sum > 0xffff) - sum -= 0xffff; - return ~sum & 0xffff; -} - -/* - * Optimized version for the PowerPC family - */ - -#elif (defined(__GNUC__) && (defined(__PPC__) || defined(__ppc__))) - -static __inline u_int -in_cksum_hdr(const struct ip *ip) -{ -register u_int sum, tmp; - __asm__ __volatile__( - " lwz %0, 0(%2) \n" - " lwz %1, 4(%2) \n" - " addc %0, %0, %1 \n" /* generate carry (XER[CA]) */ - " lwz %1, 8(%2) \n" - " adde %0, %0, %1 \n" /* add + generate */ - " lwz %1, 12(%2) \n" - " adde %0, %0, %1 \n" - " lwz %1, 16(%2) \n" - " adde %0, %0, %1 \n" - " addze %0, %0 \n" /* mop up XER[CA] */ - " rotlwi %1, %0,16 \n" /* word-swapped copy in %1 */ - " add %0, %0, %1 \n" /* see comment below */ - " not %0, %0 \n" - " srwi %0, %0, 16 \n" - :"=&r"(sum),"=&r"(tmp):"b"(ip), "m"(*ip):"xer" - ); - /* Note: if 'add' generates a carry out of the lower 16 bits - * then this is automatically added to the upper 16 bits - * where the correct result is found. (Stolen from linux.) - * %0 : upper-word lower-word - * + %1 : lower-word upper-word - * = word-sum word-sum - * ^+inter-word-carry - */ - return sum; -} - -static __inline void -in_cksum_update(struct ip *ip) -{ - int __tmpsum; - __tmpsum = (int)ntohs(ip->ip_sum) + 256; - ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); -} - -/* - * SPARC Version - */ - -#elif (defined(__GNUC__) && defined(__sparc__)) - -static __inline u_int -in_cksum_hdr(const struct ip *ip) -{ - register u_int sum = 0; - register u_int tmp_o2; - register u_int tmp_o3; - - __asm__ __volatile__ (" \ - ld [%0], %1 ; \ - ld [%0+4], %2 ; \ - ld [%0+8], %3 ; \ - addcc %1, %2, %1 ; \ - ld [%0+12], %2 ; \ - addxcc %1, %3, %1 ; \ - ld [%0+16], %3 ; \ - addxcc %1, %2, %1 ; \ - addxcc %1, %3, %1 ; \ - set 0x0ffff, %3 ; \ - srl %1, 16, %2 ; \ - and %1, %3, %1 ; \ - addx %1, %2, %1 ; \ - srl %1, 16, %2 ; \ - add %1, %2, %1 ; \ - not %1 ; \ - and %1, %3, %1 ; \ - " : "=r" (ip), "=r" (sum), "=r" (tmp_o2), "=r" (tmp_o3) - : "0" (ip), "1" (sum), "m"(*ip) - ); - return sum; -} - -#define in_cksum_update(ip) \ - do { \ - int __tmpsum; \ - __tmpsum = (int)ntohs(ip->ip_sum) + 256; \ - ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); \ - } while(0) - -/* - * Optimized version for the Altera Nios II softcore - */ -#elif defined ( __GNUC__ ) && defined ( __nios2__ ) - -static inline uint32_t _NIOS2_Add_ones_complement ( const uint32_t a, - const uint32_t b ) -{ - uint32_t sum; - uint32_t C; - __asm__ __volatile__ ( - " add %0, %2, %3 \n" /* sum <= a + b */ - " cmpltu %1, %0, %2 \n" /* C <= carryBit32 */ - " add %0, %1, %0 \n" /* sum <= sum + C */ - : "=&r"(sum), "=&r"(C) - : "r"(a), "r"(b) - ); - return sum; -} - -static inline uint16_t _NIOS2_Add_ones_complement_word_halves - ( const uint32_t a ) -{ - uint16_t sum; - uint32_t tmp; - __asm__ __volatile__ ( - " roli %1, %2, 16 \n" /* tmp <= a rotate left 16 */ - " add %1, %2, %1 \n" /* tmp <= a + tmp + carryBit16 */ - " srli %0, %1, 16 \n" /* sum <= tmp shift right 16 */ - : "=&r"(sum),"=&r"(tmp) - : "r"(a) - ); - return sum; -} - -static __inline u_int in_cksum_hdr ( const struct ip * pHdrIP ) -{ - const uint32_t * const pWd = ( const uint32_t * ) pHdrIP; - uint32_t sum = pWd[0]; - sum = _NIOS2_Add_ones_complement ( sum, pWd[1] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[2] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[3] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[4] ); - sum = _NIOS2_Add_ones_complement_word_halves ( sum ); - sum ^= 0xffff; - return sum; -} - -static __inline void in_cksum_update ( struct ip * pHdrIP ) -{ - uint32_t __tmpsum = ntohs ( pHdrIP->ip_sum ); - __tmpsum += 256u; - __tmpsum += __tmpsum >> 16u; - pHdrIP->ip_sum = htons ( ( uint16_t ) __tmpsum ); -} - -/* - * Here is the generic, portable, inefficient algorithm. - */ - -#else -u_int in_cksum_hdr(const struct ip *); -#define in_cksum_update(ip) \ - do { \ - int __tmpsum; \ - __tmpsum = (int)ntohs(ip->ip_sum) + 256; \ - ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); \ - } while(0) - -#endif - -#endif /* _MACHINE_IN_CKSUM_H_ */ |