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-rw-r--r--arch/um/sys-i386/shared/sysdep/checksum.h201
1 files changed, 0 insertions, 201 deletions
diff --git a/arch/um/sys-i386/shared/sysdep/checksum.h b/arch/um/sys-i386/shared/sysdep/checksum.h
deleted file mode 100644
index ed47445f3905..000000000000
--- a/arch/um/sys-i386/shared/sysdep/checksum.h
+++ /dev/null
@@ -1,201 +0,0 @@
-/*
- * Licensed under the GPL
- */
-
-#ifndef __UM_SYSDEP_CHECKSUM_H
-#define __UM_SYSDEP_CHECKSUM_H
-
-#include "linux/in6.h"
-#include "linux/string.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
- */
-__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().
- */
-
-static __inline__
-__wsum csum_partial_copy_nocheck(const void *src, void *dst,
- int len, __wsum sum)
-{
- memcpy(dst, src, len);
- return csum_partial(dst, len, 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
- */
-
-static __inline__
-__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
- int len, __wsum sum, int *err_ptr)
-{
- if (copy_from_user(dst, src, len)) {
- *err_ptr = -EFAULT;
- return (__force __wsum)-1;
- }
-
- return csum_partial(dst, len, sum);
-}
-
-/*
- * This is a version of ip_compute_csum() optimized for IP headers,
- * which always checksum on 4 octet boundaries.
- *
- * By Jorge Cwik <jorge@laser.satlink.net>, adapted for linux by
- * Arnt Gulbrandsen.
- */
-static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
-{
- unsigned int sum;
-
- __asm__ __volatile__(
- "movl (%1), %0 ;\n"
- "subl $4, %2 ;\n"
- "jbe 2f ;\n"
- "addl 4(%1), %0 ;\n"
- "adcl 8(%1), %0 ;\n"
- "adcl 12(%1), %0 ;\n"
-"1: adcl 16(%1), %0 ;\n"
- "lea 4(%1), %1 ;\n"
- "decl %2 ;\n"
- "jne 1b ;\n"
- "adcl $0, %0 ;\n"
- "movl %0, %2 ;\n"
- "shrl $16, %0 ;\n"
- "addw %w2, %w0 ;\n"
- "adcl $0, %0 ;\n"
- "notl %0 ;\n"
-"2: ;\n"
- /* Since the input registers which are loaded with iph and ipl
- are modified, we must also specify them as outputs, or gcc
- will assume they contain their original values. */
- : "=r" (sum), "=r" (iph), "=r" (ihl)
- : "1" (iph), "2" (ihl)
- : "memory");
- return (__force __sum16)sum;
-}
-
-/*
- * Fold a partial checksum
- */
-
-static inline __sum16 csum_fold(__wsum sum)
-{
- __asm__(
- "addl %1, %0 ;\n"
- "adcl $0xffff, %0 ;\n"
- : "=r" (sum)
- : "r" ((__force u32)sum << 16),
- "0" ((__force u32)sum & 0xffff0000)
- );
- return (__force __sum16)(~(__force u32)sum >> 16);
-}
-
-static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
- unsigned short len,
- unsigned short proto,
- __wsum sum)
-{
- __asm__(
- "addl %1, %0 ;\n"
- "adcl %2, %0 ;\n"
- "adcl %3, %0 ;\n"
- "adcl $0, %0 ;\n"
- : "=r" (sum)
- : "g" (daddr), "g"(saddr), "g"((len + proto) << 8), "0"(sum));
- return 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));
-}
-
-#define _HAVE_ARCH_IPV6_CSUM
-static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
- const struct in6_addr *daddr,
- __u32 len, unsigned short proto,
- __wsum sum)
-{
- __asm__(
- "addl 0(%1), %0 ;\n"
- "adcl 4(%1), %0 ;\n"
- "adcl 8(%1), %0 ;\n"
- "adcl 12(%1), %0 ;\n"
- "adcl 0(%2), %0 ;\n"
- "adcl 4(%2), %0 ;\n"
- "adcl 8(%2), %0 ;\n"
- "adcl 12(%2), %0 ;\n"
- "adcl %3, %0 ;\n"
- "adcl %4, %0 ;\n"
- "adcl $0, %0 ;\n"
- : "=&r" (sum)
- : "r" (saddr), "r" (daddr),
- "r"(htonl(len)), "r"(htonl(proto)), "0"(sum));
-
- return csum_fold(sum);
-}
-
-/*
- * Copy and checksum to user
- */
-#define HAVE_CSUM_COPY_USER
-static __inline__ __wsum csum_and_copy_to_user(const void *src,
- void __user *dst,
- int len, __wsum sum, int *err_ptr)
-{
- if (access_ok(VERIFY_WRITE, dst, len)) {
- if (copy_to_user(dst, src, len)) {
- *err_ptr = -EFAULT;
- return (__force __wsum)-1;
- }
-
- return csum_partial(src, len, sum);
- }
-
- if (len)
- *err_ptr = -EFAULT;
-
- return (__force __wsum)-1; /* invalid checksum */
-}
-
-#endif
-