-#ifndef __ASM_SH_CHECKSUM_H
-#define __ASM_SH_CHECKSUM_H
-
-/*
- * 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) 1999 by Kaz Kojima & Niibe Yutaka
- */
-
-#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
- */
-asmlinkage unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum);
-
-/*
- * the same as csum_partial, but copies from src while it
- * checksums, and handles user-space pointer exceptions correctly, when needed.
- *
- * here even more important to align src and dst on a 32-bit (or even
- * better 64-bit) boundary
- */
-
-asmlinkage unsigned int csum_partial_copy_generic(const unsigned char *src, unsigned char *dst,
- int len, int sum, int *src_err_ptr, int *dst_err_ptr);
-
-/*
- * Note: when you get a NULL pointer exception here this means someone
- * passed in an incorrect kernel address to one of these functions.
- *
- * If you use these functions directly please don't forget the
- * access_ok().
- */
-static __inline__
-unsigned int csum_partial_copy_nocheck (const unsigned char *src, unsigned char *dst,
- int len, int sum)
-{
- return csum_partial_copy_generic ( src, dst, len, sum, NULL, NULL);
-}
-
-static __inline__
-unsigned int csum_partial_copy_from_user (const unsigned char *src, unsigned char *dst,
- int len, int sum, int *err_ptr)
-{
- return csum_partial_copy_generic ( src, dst, len, sum, err_ptr, NULL);
-}
-
-/*
- * Fold a partial checksum
- */
-
-static __inline__ unsigned int csum_fold(unsigned int sum)
-{
- unsigned int __dummy;
- __asm__("swap.w %0, %1\n\t"
- "extu.w %0, %0\n\t"
- "extu.w %1, %1\n\t"
- "add %1, %0\n\t"
- "swap.w %0, %1\n\t"
- "add %1, %0\n\t"
- "not %0, %0\n\t"
- : "=r" (sum), "=&r" (__dummy)
- : "0" (sum)
- : "t");
- return sum;
-}
-
-/*
- * This is a version of ip_compute_csum() optimized for IP headers,
- * which always checksum on 4 octet boundaries.
- *
- * i386 version 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)
-{
- unsigned int sum, __dummy0, __dummy1;
-
- __asm__ __volatile__(
- "mov.l @%1+, %0\n\t"
- "mov.l @%1+, %3\n\t"
- "add #-2, %2\n\t"
- "clrt\n\t"
- "1:\t"
- "addc %3, %0\n\t"
- "movt %4\n\t"
- "mov.l @%1+, %3\n\t"
- "dt %2\n\t"
- "bf/s 1b\n\t"
- " cmp/eq #1, %4\n\t"
- "addc %3, %0\n\t"
- "addc %2, %0" /* Here %2 is 0, add carry-bit */
- /* Since the input registers which are loaded with iph and ihl
- are modified, we must also specify them as outputs, or gcc
- will assume they contain their original values. */
- : "=r" (sum), "=r" (iph), "=r" (ihl), "=&r" (__dummy0), "=&z" (__dummy1)
- : "1" (iph), "2" (ihl)
- : "t");
-
- return csum_fold(sum);
-}
-
-static __inline__ unsigned long csum_tcpudp_nofold(unsigned long saddr,
- unsigned long daddr,
- unsigned short len,
- unsigned short proto,
- unsigned int sum)
-{
-#ifdef __LITTLE_ENDIAN__
- unsigned long len_proto = (ntohs(len)<<16)+proto*256;
+#ifdef CONFIG_SUPERH32
+# include "checksum_32.h"
#else
- unsigned long len_proto = (proto<<16)+len;
+# include "checksum_64.h"
#endif
- __asm__("clrt\n\t"
- "addc %0, %1\n\t"
- "addc %2, %1\n\t"
- "addc %3, %1\n\t"
- "movt %0\n\t"
- "add %1, %0"
- : "=r" (sum), "=r" (len_proto)
- : "r" (daddr), "r" (saddr), "1" (len_proto), "0" (sum)
- : "t");
- 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));
-}
-
-/*
- * 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));
-}
-
-#define _HAVE_ARCH_IPV6_CSUM
-#ifdef CONFIG_IPV6
-static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
- struct in6_addr *daddr,
- __u32 len,
- unsigned short proto,
- unsigned int sum)
-{
- unsigned int __dummy;
- __asm__("clrt\n\t"
- "mov.l @(0,%2), %1\n\t"
- "addc %1, %0\n\t"
- "mov.l @(4,%2), %1\n\t"
- "addc %1, %0\n\t"
- "mov.l @(8,%2), %1\n\t"
- "addc %1, %0\n\t"
- "mov.l @(12,%2), %1\n\t"
- "addc %1, %0\n\t"
- "mov.l @(0,%3), %1\n\t"
- "addc %1, %0\n\t"
- "mov.l @(4,%3), %1\n\t"
- "addc %1, %0\n\t"
- "mov.l @(8,%3), %1\n\t"
- "addc %1, %0\n\t"
- "mov.l @(12,%3), %1\n\t"
- "addc %1, %0\n\t"
- "addc %4, %0\n\t"
- "addc %5, %0\n\t"
- "movt %1\n\t"
- "add %1, %0\n"
- : "=r" (sum), "=&r" (__dummy)
- : "r" (saddr), "r" (daddr),
- "r" (htonl(len)), "r" (htonl(proto)), "0" (sum)
- : "t");
-
- return csum_fold(sum);
-}
-#endif
-
-/*
- * Copy and checksum to user
- */
-#define HAVE_CSUM_COPY_USER
-static __inline__ unsigned int csum_and_copy_to_user (const unsigned char *src,
- unsigned char __user *dst,
- int len, int sum,
- int *err_ptr)
-{
- if (access_ok(VERIFY_WRITE, dst, len))
- return csum_partial_copy_generic(src, dst, len, sum, NULL, err_ptr);
-
- if (len)
- *err_ptr = -EFAULT;
-
- return -1; /* invalid checksum */
-}
-#endif /* __ASM_SH_CHECKSUM_H */
projects / linux-2.6-omap-h63xx.git / blobdiff