Commit 6192c1ea authored by Greg Ungerer's avatar Greg Ungerer
Browse files

m68k: merge the mmu and non-mmu versions of checksum.h 



The mmu and non-mmu versions of checksum.h are mostly the same,
merge them.

Signed-off-by: default avatarGreg Ungerer <gerg@uclinux.org>
parent 3ddc7e26

arch/m68k/include/asm/checksum.h

+169 −4
Original line number Diff line number Diff line 
#ifdef __uClinux__

#include "checksum_no.h"

#ifndef _M68K_CHECKSUM_H

#define _M68K_CHECKSUM_H



#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

 */

__wsum csum_partial(const void *buff, int len, __wsum sum);



/*

 * the same as csum_partial, but copies from src while it

 * checksums

 *

 * here even more important to align src and dst on a 32-bit (or even

 * better 64-bit) boundary

 */



extern __wsum csum_partial_copy_from_user(const void __user *src,

						void *dst,

						int len, __wsum sum,

						int *csum_err);



extern __wsum csum_partial_copy_nocheck(const void *src,

					      void *dst, int len,

					      __wsum sum);





#ifdef CONFIG_COLDFIRE



/*

 *	The ColdFire cores don't support all the 68k instructions used

 *	in the optimized checksum code below. So it reverts back to using

 *	more standard C coded checksums. The fast checksum code is

 *	significantly larger than the optimized version, so it is not

 *	inlined here.

 */

__sum16 ip_fast_csum(const void *iph, unsigned int ihl);



static inline __sum16 csum_fold(__wsum sum)

{

	unsigned int tmp = (__force u32)sum;



	tmp = (tmp & 0xffff) + (tmp >> 16);

	tmp = (tmp & 0xffff) + (tmp >> 16);



	return (__force __sum16)~tmp;

}



#else

#include "checksum_mm.h"

#endif
 


/*

 *	This is a version of ip_fast_csum() optimized for IP headers,

 *	which always checksum on 4 octet boundaries.

 */

static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)

{

	unsigned int sum = 0;

	unsigned long tmp;



	__asm__ ("subqw #1,%2\n"

		 "1:\t"

		 "movel %1@+,%3\n\t"

		 "addxl %3,%0\n\t"

		 "dbra  %2,1b\n\t"

		 "movel %0,%3\n\t"

		 "swap  %3\n\t"

		 "addxw %3,%0\n\t"

		 "clrw  %3\n\t"

		 "addxw %3,%0\n\t"

		 : "=d" (sum), "=&a" (iph), "=&d" (ihl), "=&d" (tmp)

		 : "0" (sum), "1" (iph), "2" (ihl)

		 : "memory");

	return (__force __sum16)~sum;

}



static inline __sum16 csum_fold(__wsum sum)

{

	unsigned int tmp = (__force u32)sum;



	__asm__("swap %1\n\t"

		"addw %1, %0\n\t"

		"clrw %1\n\t"

		"addxw %1, %0"

		: "=&d" (sum), "=&d" (tmp)

		: "0" (sum), "1" (tmp));



	return (__force __sum16)~sum;

}



#endif /* CONFIG_COLDFIRE */



static inline __wsum

csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,

		  unsigned short proto, __wsum sum)

{

	__asm__ ("addl  %2,%0\n\t"

		 "addxl %3,%0\n\t"

		 "addxl %4,%0\n\t"

		 "clrl %1\n\t"

		 "addxl %1,%0"

		 : "=&d" (sum), "=d" (saddr)

		 : "g" (daddr), "1" (saddr), "d" (len + proto),

		   "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)

{

	register unsigned long tmp;

	__asm__("addl %2@,%0\n\t"

		"movel %2@(4),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %2@(8),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %2@(12),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@,%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@(4),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@(8),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@(12),%1\n\t"

		"addxl %1,%0\n\t"

		"addxl %4,%0\n\t"

		"clrl %1\n\t"

		"addxl %1,%0"

		: "=&d" (sum), "=&d" (tmp)

		: "a" (saddr), "a" (daddr), "d" (len + proto),

		  "0" (sum));



	return csum_fold(sum);

}



#endif /* _M68K_CHECKSUM_H */

arch/m68k/include/asm/checksum_mm.h

deleted100644 → 0
+0 −148
Original line number Diff line number Diff line 
#ifndef _M68K_CHECKSUM_H

#define _M68K_CHECKSUM_H



#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

 */

__wsum csum_partial(const void *buff, int len, __wsum sum);



/*

 * the same as csum_partial, but copies from src while it

 * checksums

 *

 * here even more important to align src and dst on a 32-bit (or even

 * better 64-bit) boundary

 */



extern __wsum csum_partial_copy_from_user(const void __user *src,

						void *dst,

						int len, __wsum sum,

						int *csum_err);



extern __wsum csum_partial_copy_nocheck(const void *src,

					      void *dst, int len,

					      __wsum sum);



/*

 *	This is a version of ip_compute_csum() optimized for IP headers,

 *	which always checksum on 4 octet boundaries.

 *

 */

static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)

{

	unsigned int sum = 0;

	unsigned long tmp;



	__asm__ ("subqw #1,%2\n"

		 "1:\t"

		 "movel %1@+,%3\n\t"

		 "addxl %3,%0\n\t"

		 "dbra  %2,1b\n\t"

		 "movel %0,%3\n\t"

		 "swap  %3\n\t"

		 "addxw %3,%0\n\t"

		 "clrw  %3\n\t"

		 "addxw %3,%0\n\t"

		 : "=d" (sum), "=&a" (iph), "=&d" (ihl), "=&d" (tmp)

		 : "0" (sum), "1" (iph), "2" (ihl)

		 : "memory");

	return (__force __sum16)~sum;

}



/*

 *	Fold a partial checksum

 */



static inline __sum16 csum_fold(__wsum sum)

{

	unsigned int tmp = (__force u32)sum;

	__asm__("swap %1\n\t"

		"addw %1, %0\n\t"

		"clrw %1\n\t"

		"addxw %1, %0"

		: "=&d" (sum), "=&d" (tmp)

		: "0" (sum), "1" (tmp));

	return (__force __sum16)~sum;

}





static inline __wsum

csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,

		  unsigned short proto, __wsum sum)

{

	__asm__ ("addl  %2,%0\n\t"

		 "addxl %3,%0\n\t"

		 "addxl %4,%0\n\t"

		 "clrl %1\n\t"

		 "addxl %1,%0"

		 : "=&d" (sum), "=d" (saddr)

		 : "g" (daddr), "1" (saddr), "d" (len + proto),

		   "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)

{

	register unsigned long tmp;

	__asm__("addl %2@,%0\n\t"

		"movel %2@(4),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %2@(8),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %2@(12),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@,%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@(4),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@(8),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@(12),%1\n\t"

		"addxl %1,%0\n\t"

		"addxl %4,%0\n\t"

		"clrl %1\n\t"

		"addxl %1,%0"

		: "=&d" (sum), "=&d" (tmp)

		: "a" (saddr), "a" (daddr), "d" (len + proto),

		  "0" (sum));



	return csum_fold(sum);

}



#endif /* _M68K_CHECKSUM_H */

arch/m68k/include/asm/checksum_no.h

deleted100644 → 0
+0 −132
Original line number Diff line number Diff line 
#ifndef _M68K_CHECKSUM_H

#define _M68K_CHECKSUM_H



#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

 */

__wsum csum_partial(const void *buff, int len, __wsum sum);



/*

 * the same as csum_partial, but copies from src while it

 * checksums

 *

 * here even more important to align src and dst on a 32-bit (or even

 * better 64-bit) boundary

 */



__wsum csum_partial_copy_nocheck(const void *src, void *dst,

	int len, __wsum sum);





/*

 * the same as csum_partial_copy, but copies from user space.

 *

 * here even more important to align src and dst on a 32-bit (or even

 * better 64-bit) boundary

 */



extern __wsum csum_partial_copy_from_user(const void __user *src,

	void *dst, int len, __wsum sum, int *csum_err);



__sum16 ip_fast_csum(const void *iph, unsigned int ihl);



/*

 *	Fold a partial checksum

 */



static inline __sum16 csum_fold(__wsum sum)

{

	unsigned int tmp = (__force u32)sum;

#ifdef CONFIG_COLDFIRE

	tmp = (tmp & 0xffff) + (tmp >> 16);

	tmp = (tmp & 0xffff) + (tmp >> 16);

	return (__force __sum16)~tmp;

#else

	__asm__("swap %1\n\t"

		"addw %1, %0\n\t"

		"clrw %1\n\t"

		"addxw %1, %0"

		: "=&d" (sum), "=&d" (tmp)

		: "0" (sum), "1" (sum));

	return (__force __sum16)~sum;

#endif

}





/*

 * computes the checksum of the TCP/UDP pseudo-header

 * returns a 16-bit checksum, already complemented

 */



static inline __wsum

csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,

		  unsigned short proto, __wsum sum)

{

	__asm__ ("addl  %1,%0\n\t"

		 "addxl %4,%0\n\t"

		 "addxl %5,%0\n\t"

		 "clrl %1\n\t"

		 "addxl %1,%0"

		 : "=&d" (sum), "=&d" (saddr)

		 : "0" (daddr), "1" (saddr), "d" (len + proto),

		   "d"(sum));

	return sum;

}



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

 */



extern __sum16 ip_compute_csum(const void *buff, int len);



#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)

{

	register unsigned long tmp;

	__asm__("addl %2@,%0\n\t"

		"movel %2@(4),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %2@(8),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %2@(12),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@,%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@(4),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@(8),%1\n\t"

		"addxl %1,%0\n\t"

		"movel %3@(12),%1\n\t"

		"addxl %1,%0\n\t"

		"addxl %4,%0\n\t"

		"clrl %1\n\t"

		"addxl %1,%0"

		: "=&d" (sum), "=&d" (tmp)

		: "a" (saddr), "a" (daddr), "d" (len + proto),

		  "0" (sum));



	return csum_fold(sum);

}



#endif /* _M68K_CHECKSUM_H */

arch/m68knommu/lib/checksum.c

+2 −9
Original line number Diff line number Diff line
@@ -92,6 +92,7 @@ static unsigned long do_csum(const unsigned char * buff, int len) 
	return result;

}



#ifdef CONFIG_COLDFIRE

/*

 *	This is a version of ip_compute_csum() optimized for IP headers,

 *	which always checksum on 4 octet boundaries.
@@ -100,6 +101,7 @@ __sum16 ip_fast_csum(const void *iph, unsigned int ihl) 
{

	return (__force __sum16)~do_csum(iph,ihl*4);

}

#endif



/*

 * computes the checksum of a memory block at buff, length len,
@@ -126,15 +128,6 @@ __wsum csum_partial(const void *buff, int len, __wsum sum) 


EXPORT_SYMBOL(csum_partial);



/*

 * this routine is used for miscellaneous IP-like checksums, mainly

 * in icmp.c

 */

__sum16 ip_compute_csum(const void *buff, int len)

{

	return (__force __sum16)~do_csum(buff,len);

}



/*

 * copy from fs while checksumming, otherwise like csum_partial

 */