sh: Split out checksum.h in to _32 and _64 variants.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
parent
63e2c80332
commit
fcfdd0f14f
@ -141,7 +141,9 @@ EXPORT_SYMBOL(clear_user_page);
|
||||
#endif
|
||||
|
||||
EXPORT_SYMBOL(csum_partial);
|
||||
#ifdef CONFIG_SUPERH32
|
||||
EXPORT_SYMBOL(csum_partial_copy_generic);
|
||||
#endif
|
||||
#ifdef CONFIG_IPV6
|
||||
EXPORT_SYMBOL(csum_ipv6_magic);
|
||||
#endif
|
||||
|
||||
@ -1,215 +1,5 @@
|
||||
#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 __wsum csum_partial(const void *buff, int len, __wsum 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 __wsum csum_partial_copy_generic(const void *src, void *dst,
|
||||
int len, __wsum 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
|
||||
__wsum csum_partial_copy_nocheck(const void *src, void *dst,
|
||||
int len, __wsum sum)
|
||||
{
|
||||
return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);
|
||||
}
|
||||
|
||||
static inline
|
||||
__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
|
||||
int len, __wsum sum, int *err_ptr)
|
||||
{
|
||||
return csum_partial_copy_generic((__force const void *)src, dst,
|
||||
len, sum, err_ptr, NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* Fold a partial checksum
|
||||
*/
|
||||
|
||||
static inline __sum16 csum_fold(__wsum 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 (__force __sum16)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 __sum16 ip_fast_csum(const void *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 __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
|
||||
unsigned short len,
|
||||
unsigned short proto,
|
||||
__wsum sum)
|
||||
{
|
||||
#ifdef __LITTLE_ENDIAN__
|
||||
unsigned long len_proto = (proto + len) << 8;
|
||||
#ifdef CONFIG_SUPERH32
|
||||
# include "checksum_32.h"
|
||||
#else
|
||||
unsigned long len_proto = proto + 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 __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)
|
||||
{
|
||||
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);
|
||||
}
|
||||
|
||||
/*
|
||||
* 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))
|
||||
return csum_partial_copy_generic((__force const void *)src,
|
||||
dst, len, sum, NULL, err_ptr);
|
||||
|
||||
if (len)
|
||||
*err_ptr = -EFAULT;
|
||||
|
||||
return (__force __wsum)-1; /* invalid checksum */
|
||||
}
|
||||
#endif /* __ASM_SH_CHECKSUM_H */
|
||||
|
||||
215
include/asm-sh/checksum_32.h
Normal file
215
include/asm-sh/checksum_32.h
Normal file
@ -0,0 +1,215 @@
|
||||
#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 __wsum csum_partial(const void *buff, int len, __wsum 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 __wsum csum_partial_copy_generic(const void *src, void *dst,
|
||||
int len, __wsum 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
|
||||
__wsum csum_partial_copy_nocheck(const void *src, void *dst,
|
||||
int len, __wsum sum)
|
||||
{
|
||||
return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);
|
||||
}
|
||||
|
||||
static inline
|
||||
__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
|
||||
int len, __wsum sum, int *err_ptr)
|
||||
{
|
||||
return csum_partial_copy_generic((__force const void *)src, dst,
|
||||
len, sum, err_ptr, NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* Fold a partial checksum
|
||||
*/
|
||||
|
||||
static inline __sum16 csum_fold(__wsum 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 (__force __sum16)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 __sum16 ip_fast_csum(const void *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 __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
|
||||
unsigned short len,
|
||||
unsigned short proto,
|
||||
__wsum sum)
|
||||
{
|
||||
#ifdef __LITTLE_ENDIAN__
|
||||
unsigned long len_proto = (proto + len) << 8;
|
||||
#else
|
||||
unsigned long len_proto = proto + len;
|
||||
#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 __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)
|
||||
{
|
||||
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);
|
||||
}
|
||||
|
||||
/*
|
||||
* 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))
|
||||
return csum_partial_copy_generic((__force const void *)src,
|
||||
dst, len, sum, NULL, err_ptr);
|
||||
|
||||
if (len)
|
||||
*err_ptr = -EFAULT;
|
||||
|
||||
return (__force __wsum)-1; /* invalid checksum */
|
||||
}
|
||||
#endif /* __ASM_SH_CHECKSUM_H */
|
||||
@ -12,8 +12,6 @@
|
||||
*
|
||||
*/
|
||||
|
||||
#include <asm/registers.h>
|
||||
|
||||
/*
|
||||
* computes the checksum of a memory block at buff, length len,
|
||||
* and adds in "sum" (32-bit)
|
||||
Loading…
Reference in New Issue
Block a user