diff options
Diffstat (limited to 'include/asm-mips64/checksum.h')
| -rw-r--r-- | include/asm-mips64/checksum.h | 245 |
1 files changed, 126 insertions, 119 deletions
diff --git a/include/asm-mips64/checksum.h b/include/asm-mips64/checksum.h index 94206a81c..bfac60ffe 100644 --- a/include/asm-mips64/checksum.h +++ b/include/asm-mips64/checksum.h @@ -1,15 +1,17 @@ -/* $Id: checksum.h,v 1.6 2000/02/18 22:06:19 ralf Exp $ - * +/* * 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, 1996, 1997, 1998, 1999 by Ralf Baechle * Copyright (C) 1999 Silicon Graphics, Inc. + * Copyright (C) 2001 Thiemo Seufer. */ #ifndef _ASM_CHECKSUM_H #define _ASM_CHECKSUM_H +#include <asm/uaccess.h> + /* * computes the checksum of a memory block at buff, length len, * and adds in "sum" (32-bit) @@ -22,7 +24,7 @@ * * it's best to have buff aligned on a 32-bit boundary */ -unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum); +unsigned int csum_partial(const unsigned char *buff, int len, unsigned int sum); /* * this is a new version of the above that records errors it finds in *errp, @@ -41,9 +43,9 @@ unsigned int csum_partial_copy_from_user(const char *src, char *dst, int len, * Copy and checksum to user */ #define HAVE_CSUM_COPY_USER -extern inline unsigned int -csum_and_copy_to_user (const char *src, char *dst, - int len, int sum, int *err_ptr) +extern inline unsigned int csum_and_copy_to_user (const char *src, char *dst, + int len, int sum, + int *err_ptr) { sum = csum_partial(src, len, sum); @@ -62,23 +64,23 @@ csum_and_copy_to_user (const char *src, char *dst, * this is obsolete and will go away. */ #define csum_partial_copy_fromuser csum_partial_copy -unsigned int csum_partial_copy(const char *src, char *dst, int len, unsigned int sum); - +unsigned int csum_partial_copy(const char *src, char *dst, int len, + unsigned int sum); + /* * Fold a partial checksum without adding pseudo headers */ -static inline unsigned short int -csum_fold(unsigned int sum) +static inline unsigned short int csum_fold(unsigned int sum) { - __asm__(" - .set noat - sll $1, %0, 16 - addu %0, $1 - sltu $1, %0, $1 - srl %0, %0, 16 - addu %0, $1 - xori %0, 0xffff - .set at" + __asm__( + ".set\tnoat\t\t\t# csum_fold\n\t" + "sll\t$1,%0,16\n\t" + "addu\t%0,$1\n\t" + "sltu\t$1,%0,$1\n\t" + "srl\t%0,%0,16\n\t" + "addu\t%0,$1\n\t" + "xori\t%0,0xffff\n\t" + ".set\tat" : "=r" (sum) : "0" (sum) : "$1"); @@ -93,8 +95,8 @@ csum_fold(unsigned int sum) * By Jorge Cwik <jorge@laser.satlink.net>, adapted for linux by * Arnt Gulbrandsen. */ -static inline unsigned short -ip_fast_csum(unsigned char * iph, unsigned int ihl) +static inline unsigned short ip_fast_csum(unsigned char *iph, + unsigned int ihl) { unsigned int sum; unsigned long dummy; @@ -103,36 +105,35 @@ ip_fast_csum(unsigned char * iph, unsigned int ihl) * This is for 32-bit processors ... but works just fine for 64-bit * processors for now ... XXX */ - __asm__ __volatile__(" - .set noreorder - .set noat - lw %0, (%1) - subu %2, 4 - dsll %2, 2 - - lw %3, 4(%1) - daddu %2, %1 - addu %0, %3 - sltu $1, %0, %3 - lw %3, 8(%1) - addu %0, $1 - addu %0, %3 - sltu $1, %0, %3 - lw %3, 12(%1) - addu %0, $1 - addu %0, %3 - sltu $1, %0, %3 - addu %0, $1 + __asm__ __volatile__( + ".set\tnoreorder\t\t\t# ip_fast_csum\n\t" + ".set\tnoat\n\t" + "lw\t%0, (%1)\n\t" + "subu\t%2, 4\n\t" + "dsll\t%2, 2\n\t" + "lw\t%3, 4(%1)\n\t" + "daddu\t%2, %1\n\t" + "addu\t%0, %3\n\t" + "sltu\t$1, %0, %3\n\t" + "lw\t%3, 8(%1)\n\t" + "addu\t%0, $1\n\t" + "addu\t%0, %3\n\t" + "sltu\t$1, %0, %3\n\t" + "lw\t%3, 12(%1)\n\t" + "addu\t%0, $1\n\t" + "addu\t%0, %3\n\t" + "sltu\t$1, %0, %3\n\t" + "addu\t%0, $1\n" -1: lw %3, 16(%1) - daddiu %1, 4 - addu %0, %3 - sltu $1, %0, %3 - bne %2, %1, 1b - addu %0, $1 + "1:\tlw\t%3, 16(%1)\n\t" + "daddiu\t%1, 4\n" + "addu\t%0, %3\n\t" + "sltu\t$1, %0, %3\n\t" + "bne\t%2, %1, 1b\n\t" + " addu\t%0, $1\n" -2: .set at - .set reorder" + "2:\t.set\tat\n\t" + ".set\treorder" : "=&r" (sum), "=&r" (iph), "=&r" (ihl), "=&r" (dummy) : "1" (iph), "2" (ihl) : "$1"); @@ -144,26 +145,29 @@ ip_fast_csum(unsigned char * iph, unsigned int ihl) * computes the checksum of the TCP/UDP pseudo-header * returns a 16-bit checksum, already complemented */ -static inline unsigned long -csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, - unsigned short len, unsigned short proto, unsigned int sum) +static inline unsigned long csum_tcpudp_nofold(unsigned long saddr, + unsigned long daddr, + unsigned short len, + unsigned short proto, + unsigned int sum) { - __asm__(" - .set noat - daddu %0, %2 - daddu %0, %3 - daddu %0, %4 - dsll32 $1, %0, 0 - daddu %0, $1 # never results in an overflow - dsrl32 %0, %0, 0 - .set at" + __asm__( + ".set\tnoat\t\t\t# csum_tcpudp_nofold\n\t" + "daddu\t%0, %2\n\t" + "daddu\t%0, %3\n\t" + "daddu\t%0, %4\n\t" + "dsll32\t$1, %0, 0\n\t" + "daddu\t%0, $1\n\t" + "dsrl32\t%0, %0, 0\n\t" + ".set\tat" : "=r" (sum) - : "0" (sum), "r"(saddr), "r" (daddr), + : "r" (daddr), "r"(saddr), #ifdef __MIPSEL__ - "r" ((ntohs(len)<<16)+proto*256) + "r" ((ntohs(len)<<16)+proto*256), #else - "r" (((proto)<<16)+len) + "r" (((proto)<<16)+len), #endif + "r" (sum) : "$1"); return sum; @@ -173,82 +177,85 @@ csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, * computes the checksum of the TCP/UDP pseudo-header * returns a 16-bit checksum, already complemented */ -static inline unsigned short int -csum_tcpudp_magic(unsigned long saddr, unsigned long daddr, unsigned short len, - unsigned short proto, unsigned int sum) +static inline unsigned short int csum_tcpudp_magic(unsigned long saddr, + unsigned long daddr, + unsigned short len, + unsigned short proto, + unsigned int sum) { - return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,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 unsigned short -ip_compute_csum(unsigned char * buff, int len) +static inline unsigned short ip_compute_csum(unsigned char * buff, int len) { return csum_fold(csum_partial(buff, len, 0)); } #define _HAVE_ARCH_IPV6_CSUM -static inline unsigned short int -csum_ipv6_magic(struct in6_addr *saddr, struct in6_addr *daddr, __u32 len, - unsigned short proto, unsigned int sum) +static inline unsigned short int csum_ipv6_magic(struct in6_addr *saddr, + struct in6_addr *daddr, + __u32 len, + unsigned short proto, + unsigned int sum) { - __asm__(" - .set noreorder - .set noat - addu %0, %5 # proto (long in network byte order) - sltu $1, %0, %5 - addu %0, $1 + __asm__( + ".set\tnoreorder\t\t\t# csum_ipv6_magic\n\t" + ".set\tnoat\n\t" + "addu\t%0, %5\t\t\t# proto (long in network byte order)\n\t" + "sltu\t$1, %0, %5\n\t" + "addu\t%0, $1\n\t" - addu %0, %6 # csum - sltu $1, %0, %6 - lw %1, 0(%2) # four words source address - addu %0, $1 - addu %0, %1 - sltu $1, %0, $1 + "addu\t%0, %6\t\t\t# csum\n\t" + "sltu\t$1, %0, %6\n\t" + "lw\t%1, 0(%2)\t\t\t# four words source address\n\t" + "addu\t%0, $1\n\t" + "addu\t%0, %1\n\t" + "sltu\t$1, %0, $1\n\t" - lw %1, 4(%2) - addu %0, $1 - addu %0, %1 - sltu $1, %0, $1 + "lw\t%1, 4(%2)\n\t" + "addu\t%0, $1\n\t" + "addu\t%0, %1\n\t" + "sltu\t$1, %0, $1\n\t" - lw %1, 8(%2) - addu %0, $1 - addu %0, %1 - sltu $1, %0, $1 + "lw\t%1, 8(%2)\n\t" + "addu\t%0, $1\n\t" + "addu\t%0, %1\n\t" + "sltu\t$1, %0, $1\n\t" - lw %1, 12(%2) - addu %0, $1 - addu %0, %1 - sltu $1, %0, $1 + "lw\t%1, 12(%2)\n\t" + "addu\t%0, $1\n\t" + "addu\t%0, %1\n\t" + "sltu\t$1, %0, $1\n\t" - lw %1, 0(%3) - addu %0, $1 - addu %0, %1 - sltu $1, %0, $1 + "lw\t%1, 0(%3)\n\t" + "addu\t%0, $1\n\t" + "addu\t%0, %1\n\t" + "sltu\t$1, %0, $1\n\t" - lw %1, 4(%3) - addu %0, $1 - addu %0, %1 - sltu $1, %0, $1 + "lw\t%1, 4(%3)\n\t" + "addu\t%0, $1\n\t" + "addu\t%0, %1\n\t" + "sltu\t$1, %0, $1\n\t" - lw %1, 8(%3) - addu %0, $1 - addu %0, %1 - sltu $1, %0, $1 + "lw\t%1, 8(%3)\n\t" + "addu\t%0, $1\n\t" + "addu\t%0, %1\n\t" + "sltu\t$1, %0, $1\n\t" - lw %1, 12(%3) - addu %0, $1 - addu %0, %1 - sltu $1, %0, $1 - .set noat - .set noreorder" - : "=r" (sum), "=r" (proto) - : "r" (saddr), "r" (daddr), - "0" (htonl(len)), "1" (htonl(proto)), "r"(sum) - : "$1"); + "lw\t%1, 12(%3)\n\t" + "addu\t%0, $1\n\t" + "addu\t%0, %1\n\t" + "sltu\t$1, %0, $1\n\t" + ".set\tnoat\n\t" + ".set\tnoreorder" + : "=r" (sum), "=r" (proto) + : "r" (saddr), "r" (daddr), + "0" (htonl(len)), "1" (htonl(proto)), "r" (sum) + : "$1"); return csum_fold(sum); } |