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Diffstat (limited to 'include/asm-sparc64/checksum.h')
| -rw-r--r-- | include/asm-sparc64/checksum.h | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/include/asm-sparc64/checksum.h b/include/asm-sparc64/checksum.h deleted file mode 100644 index dc8bed246fc..00000000000 --- a/include/asm-sparc64/checksum.h +++ /dev/null @@ -1,173 +0,0 @@ -/* $Id: checksum.h,v 1.19 2002/02/09 19:49:31 davem Exp $ */ -#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 <asm/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 - */ -extern unsigned int csum_partial(const unsigned char * buff, int len, unsigned int 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 - */ -extern unsigned int csum_partial_copy_nocheck(const unsigned char *src, - unsigned char *dst, - int len, unsigned int sum); - -extern long __csum_partial_copy_from_user(const unsigned char __user *src, - unsigned char *dst, int len, - unsigned int sum); - -static inline unsigned int -csum_partial_copy_from_user(const unsigned char __user *src, - unsigned char *dst, int len, - unsigned int sum, int *err) -{ - long ret = __csum_partial_copy_from_user(src, dst, len, sum); - if (ret < 0) - *err = -EFAULT; - return (unsigned int) ret; -} - -/* - * Copy and checksum to user - */ -#define HAVE_CSUM_COPY_USER -extern long __csum_partial_copy_to_user(const unsigned char *src, - unsigned char __user *dst, int len, - unsigned int sum); - -static inline unsigned int -csum_and_copy_to_user(const unsigned char *src, - unsigned char __user *dst, int len, - unsigned int sum, int *err) -{ - long ret = __csum_partial_copy_to_user(src, dst, len, sum); - if (ret < 0) - *err = -EFAULT; - return (unsigned int) ret; -} - -/* ihl is always 5 or greater, almost always is 5, and iph is word aligned - * the majority of the time. - */ -extern unsigned short ip_fast_csum(__const__ unsigned char *iph, - unsigned int ihl); - -/* Fold a partial checksum without adding pseudo headers. */ -static inline unsigned short csum_fold(unsigned int 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" (sum<<16) - : "cc"); - return (sum & 0xffff); -} - -static inline unsigned long csum_tcpudp_nofold(unsigned long saddr, - unsigned long daddr, - unsigned int len, - unsigned short proto, - unsigned int 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<<16)+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 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)); -} - -#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) -{ - __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 unsigned short ip_compute_csum(unsigned char * buff, int len) -{ - return csum_fold(csum_partial(buff, len, 0)); -} - -#endif /* !(__SPARC64_CHECKSUM_H) */ |