+++ /dev/null
-#ifndef __ASM_SH_CHECKSUM_64_H
-#define __ASM_SH_CHECKSUM_64_H
-
-/*
- * include/asm-sh/checksum_64.h
- *
- * Copyright (C) 2000, 2001 Paolo Alberelli
- *
- * 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.
- */
-
-/*
- * 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 __wsum csum_partial(const void *buff, int len, __wsum sum);
-
-/*
- * 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().
- */
-
-
-__wsum csum_partial_copy_nocheck(const void *src, void *dst, int len,
- __wsum sum);
-
-__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
- int len, __wsum sum, int *err_ptr);
-
-static inline __sum16 csum_fold(__wsum csum)
-{
- u32 sum = (__force u32)csum;
- sum = (sum & 0xffff) + (sum >> 16);
- sum = (sum & 0xffff) + (sum >> 16);
- return (__force __sum16)~sum;
-}
-
-__sum16 ip_fast_csum(const void *iph, unsigned int ihl);
-
-__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
- unsigned short len, unsigned short proto,
- __wsum sum);
-
-/*
- * computes the checksum of the TCP/UDP pseudo-header
- * returns a 16-bit checksum, already complemented
- */
-static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
- unsigned short len,
- unsigned short proto,
- __wsum 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 __sum16 ip_compute_csum(const void *buff, int len)
-{
- return csum_fold(csum_partial(buff, len, 0));
-}
-
-#endif /* __ASM_SH_CHECKSUM_64_H */
+++ /dev/null
-/*
- * arch/sh/lib64/c-checksum.c
- *
- * This file contains network checksum routines that are better done
- * in an architecture-specific manner due to speed..
- */
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <asm/byteorder.h>
-#include <asm/uaccess.h>
-
-static inline unsigned short from64to16(unsigned long long x)
-{
- /* add up 32-bit words for 33 bits */
- x = (x & 0xffffffff) + (x >> 32);
- /* add up 16-bit and 17-bit words for 17+c bits */
- x = (x & 0xffff) + (x >> 16);
- /* add up 16-bit and 2-bit for 16+c bit */
- x = (x & 0xffff) + (x >> 16);
- /* add up carry.. */
- x = (x & 0xffff) + (x >> 16);
- return x;
-}
-
-static inline unsigned short foldto16(unsigned long x)
-{
- /* add up 16-bit for 17 bits */
- x = (x & 0xffff) + (x >> 16);
- /* add up carry.. */
- x = (x & 0xffff) + (x >> 16);
- return x;
-}
-
-static inline unsigned short myfoldto16(unsigned long long x)
-{
- /* Fold down to 32-bits so we don't lose in the typedef-less
- network stack. */
- /* 64 to 33 */
- x = (x & 0xffffffff) + (x >> 32);
- /* 33 to 32 */
- x = (x & 0xffffffff) + (x >> 32);
-
- /* add up 16-bit for 17 bits */
- x = (x & 0xffff) + (x >> 16);
- /* add up carry.. */
- x = (x & 0xffff) + (x >> 16);
- return x;
-}
-
-#define odd(x) ((x)&1)
-#define U16(x) ntohs(x)
-
-static unsigned long do_csum(const unsigned char *buff, int len)
-{
- int odd, count;
- unsigned long result = 0;
-
- pr_debug("do_csum buff %p, len %d (0x%x)\n", buff, len, len);
-#ifdef DEBUG
- for (i = 0; i < len; i++) {
- if ((i % 26) == 0)
- printk("\n");
- printk("%02X ", buff[i]);
- }
-#endif
-
- if (len <= 0)
- goto out;
-
- odd = 1 & (unsigned long) buff;
- if (odd) {
- result = *buff << 8;
- len--;
- buff++;
- }
- count = len >> 1; /* nr of 16-bit words.. */
- if (count) {
- if (2 & (unsigned long) buff) {
- result += *(unsigned short *) buff;
- count--;
- len -= 2;
- buff += 2;
- }
- count >>= 1; /* nr of 32-bit words.. */
- if (count) {
- unsigned long carry = 0;
- do {
- unsigned long w = *(unsigned long *) buff;
- buff += 4;
- count--;
- result += carry;
- result += w;
- carry = (w > result);
- } while (count);
- result += carry;
- result = (result & 0xffff) + (result >> 16);
- }
- if (len & 2) {
- result += *(unsigned short *) buff;
- buff += 2;
- }
- }
- if (len & 1)
- result += *buff;
- result = foldto16(result);
- if (odd)
- result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
-
- pr_debug("\nCHECKSUM is 0x%lx\n", result);
-
- out:
- return result;
-}
-
-/* computes the checksum of a memory block at buff, length len,
- and adds in "sum" (32-bit) */
-__wsum csum_partial(const void *buff, int len, __wsum sum)
-{
- unsigned long long result = do_csum(buff, len);
-
- /* add in old sum, and carry.. */
- result += (__force u32)sum;
- /* 32+c bits -> 32 bits */
- result = (result & 0xffffffff) + (result >> 32);
-
- pr_debug("csum_partial, buff %p len %d sum 0x%x result=0x%016Lx\n",
- buff, len, sum, result);
-
- return (__force __wsum)result;
-}
-
-/* Copy while checksumming, otherwise like csum_partial. */
-__wsum
-csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
-{
- sum = csum_partial(src, len, sum);
- memcpy(dst, src, len);
-
- return sum;
-}
-
-/* Copy from userspace and compute checksum. If we catch an exception
- then zero the rest of the buffer. */
-__wsum
-csum_partial_copy_from_user(const void __user *src, void *dst, int len,
- __wsum sum, int *err_ptr)
-{
- int missing;
-
- pr_debug
- ("csum_partial_copy_from_user src %p, dest %p, len %d, sum %08x, err_ptr %p\n",
- src, dst, len, sum, err_ptr);
- missing = copy_from_user(dst, src, len);
- pr_debug(" access_ok %d\n", __access_ok((unsigned long) src, len));
- pr_debug(" missing %d\n", missing);
- if (missing) {
- memset(dst + len - missing, 0, missing);
- *err_ptr = -EFAULT;
- }
-
- return csum_partial(dst, len, sum);
-}
-
-/* Copy to userspace and compute checksum. */
-__wsum
-csum_partial_copy_to_user(const unsigned char *src, unsigned char *dst, int len,
- __wsum sum, int *err_ptr)
-{
- sum = csum_partial(src, len, sum);
-
- if (copy_to_user(dst, src, len))
- *err_ptr = -EFAULT;
-
- return sum;
-}
-
-/*
- * This is a version of ip_compute_csum() optimized for IP headers,
- * which always checksum on 4 octet boundaries.
- */
-__sum16 ip_fast_csum(const void *iph, unsigned int ihl)
-{
- pr_debug("ip_fast_csum %p,%d\n", iph, ihl);
-
- return (__force __sum16)~do_csum(iph, ihl * 4);
-}
-
-__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
- unsigned short len,
- unsigned short proto, __wsum sum)
-{
- unsigned long long result;
-
- pr_debug("ntohs(0x%x)=0x%x\n", 0xdead, ntohs(0xdead));
- pr_debug("htons(0x%x)=0x%x\n", 0xdead, htons(0xdead));
-
- result = (__force u64) saddr + (__force u64) daddr +
- (__force u64) sum + ((len + proto) << 8);
-
- /* Fold down to 32-bits so we don't lose in the typedef-less
- network stack. */
- /* 64 to 33 */
- result = (result & 0xffffffff) + (result >> 32);
- /* 33 to 32 */
- result = (result & 0xffffffff) + (result >> 32);
-
- pr_debug("%s saddr %x daddr %x len %x proto %x sum %x result %08Lx\n",
- __func__, saddr, daddr, len, proto, sum, result);
-
- return (__wsum)result;
-}
-EXPORT_SYMBOL(csum_tcpudp_nofold);
git.openpandora.org / pandora-kernel.git / commitdiff