a439fe51a1
The majority of this patch was created by the following script: *** ASM=arch/sparc/include/asm mkdir -p $ASM git mv include/asm-sparc64/ftrace.h $ASM git rm include/asm-sparc64/* git mv include/asm-sparc/* $ASM sed -ie 's/asm-sparc64/asm/g' $ASM/* sed -ie 's/asm-sparc/asm/g' $ASM/* *** The rest was an update of the top-level Makefile to use sparc for header files when sparc64 is being build. And a small fixlet to pick up the correct unistd.h from sparc64 code. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
242 lines
6.7 KiB
C
242 lines
6.7 KiB
C
#ifndef __SPARC_CHECKSUM_H
|
|
#define __SPARC_CHECKSUM_H
|
|
|
|
/* checksum.h: IP/UDP/TCP checksum routines on the Sparc.
|
|
*
|
|
* Copyright(C) 1995 Linus Torvalds
|
|
* Copyright(C) 1995 Miguel de Icaza
|
|
* Copyright(C) 1996 David S. Miller
|
|
* Copyright(C) 1996 Eddie C. Dost
|
|
* Copyright(C) 1997 Jakub Jelinek
|
|
*
|
|
* derived from:
|
|
* Alpha checksum c-code
|
|
* ix86 inline assembly
|
|
* RFC1071 Computing the Internet Checksum
|
|
*/
|
|
|
|
#include <linux/in6.h>
|
|
#include <asm/uaccess.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
|
|
*/
|
|
extern __wsum csum_partial(const void *buff, int len, __wsum sum);
|
|
|
|
/* the same as csum_partial, but copies from fs:src while it
|
|
* checksums
|
|
*
|
|
* here even more important to align src and dst on a 32-bit (or even
|
|
* better 64-bit) boundary
|
|
*/
|
|
|
|
extern unsigned int __csum_partial_copy_sparc_generic (const unsigned char *, unsigned char *);
|
|
|
|
static inline __wsum
|
|
csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
|
|
{
|
|
register unsigned int ret asm("o0") = (unsigned int)src;
|
|
register char *d asm("o1") = dst;
|
|
register int l asm("g1") = len;
|
|
|
|
__asm__ __volatile__ (
|
|
"call __csum_partial_copy_sparc_generic\n\t"
|
|
" mov %6, %%g7\n"
|
|
: "=&r" (ret), "=&r" (d), "=&r" (l)
|
|
: "0" (ret), "1" (d), "2" (l), "r" (sum)
|
|
: "o2", "o3", "o4", "o5", "o7",
|
|
"g2", "g3", "g4", "g5", "g7",
|
|
"memory", "cc");
|
|
return (__force __wsum)ret;
|
|
}
|
|
|
|
static inline __wsum
|
|
csum_partial_copy_from_user(const void __user *src, void *dst, int len,
|
|
__wsum sum, int *err)
|
|
{
|
|
register unsigned long ret asm("o0") = (unsigned long)src;
|
|
register char *d asm("o1") = dst;
|
|
register int l asm("g1") = len;
|
|
register __wsum s asm("g7") = sum;
|
|
|
|
__asm__ __volatile__ (
|
|
".section __ex_table,#alloc\n\t"
|
|
".align 4\n\t"
|
|
".word 1f,2\n\t"
|
|
".previous\n"
|
|
"1:\n\t"
|
|
"call __csum_partial_copy_sparc_generic\n\t"
|
|
" st %8, [%%sp + 64]\n"
|
|
: "=&r" (ret), "=&r" (d), "=&r" (l), "=&r" (s)
|
|
: "0" (ret), "1" (d), "2" (l), "3" (s), "r" (err)
|
|
: "o2", "o3", "o4", "o5", "o7", "g2", "g3", "g4", "g5",
|
|
"cc", "memory");
|
|
return (__force __wsum)ret;
|
|
}
|
|
|
|
static inline __wsum
|
|
csum_partial_copy_to_user(const void *src, void __user *dst, int len,
|
|
__wsum sum, int *err)
|
|
{
|
|
if (!access_ok (VERIFY_WRITE, dst, len)) {
|
|
*err = -EFAULT;
|
|
return sum;
|
|
} else {
|
|
register unsigned long ret asm("o0") = (unsigned long)src;
|
|
register char __user *d asm("o1") = dst;
|
|
register int l asm("g1") = len;
|
|
register __wsum s asm("g7") = sum;
|
|
|
|
__asm__ __volatile__ (
|
|
".section __ex_table,#alloc\n\t"
|
|
".align 4\n\t"
|
|
".word 1f,1\n\t"
|
|
".previous\n"
|
|
"1:\n\t"
|
|
"call __csum_partial_copy_sparc_generic\n\t"
|
|
" st %8, [%%sp + 64]\n"
|
|
: "=&r" (ret), "=&r" (d), "=&r" (l), "=&r" (s)
|
|
: "0" (ret), "1" (d), "2" (l), "3" (s), "r" (err)
|
|
: "o2", "o3", "o4", "o5", "o7",
|
|
"g2", "g3", "g4", "g5",
|
|
"cc", "memory");
|
|
return (__force __wsum)ret;
|
|
}
|
|
}
|
|
|
|
#define HAVE_CSUM_COPY_USER
|
|
#define csum_and_copy_to_user csum_partial_copy_to_user
|
|
|
|
/* ihl is always 5 or greater, almost always is 5, and iph is word aligned
|
|
* the majority of the time.
|
|
*/
|
|
static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
|
|
{
|
|
__sum16 sum;
|
|
|
|
/* Note: We must read %2 before we touch %0 for the first time,
|
|
* because GCC can legitimately use the same register for
|
|
* both operands.
|
|
*/
|
|
__asm__ __volatile__("sub\t%2, 4, %%g4\n\t"
|
|
"ld\t[%1 + 0x00], %0\n\t"
|
|
"ld\t[%1 + 0x04], %%g2\n\t"
|
|
"ld\t[%1 + 0x08], %%g3\n\t"
|
|
"addcc\t%%g2, %0, %0\n\t"
|
|
"addxcc\t%%g3, %0, %0\n\t"
|
|
"ld\t[%1 + 0x0c], %%g2\n\t"
|
|
"ld\t[%1 + 0x10], %%g3\n\t"
|
|
"addxcc\t%%g2, %0, %0\n\t"
|
|
"addx\t%0, %%g0, %0\n"
|
|
"1:\taddcc\t%%g3, %0, %0\n\t"
|
|
"add\t%1, 4, %1\n\t"
|
|
"addxcc\t%0, %%g0, %0\n\t"
|
|
"subcc\t%%g4, 1, %%g4\n\t"
|
|
"be,a\t2f\n\t"
|
|
"sll\t%0, 16, %%g2\n\t"
|
|
"b\t1b\n\t"
|
|
"ld\t[%1 + 0x10], %%g3\n"
|
|
"2:\taddcc\t%0, %%g2, %%g2\n\t"
|
|
"srl\t%%g2, 16, %0\n\t"
|
|
"addx\t%0, %%g0, %0\n\t"
|
|
"xnor\t%%g0, %0, %0"
|
|
: "=r" (sum), "=&r" (iph)
|
|
: "r" (ihl), "1" (iph)
|
|
: "g2", "g3", "g4", "cc", "memory");
|
|
return sum;
|
|
}
|
|
|
|
/* Fold a partial checksum without adding pseudo headers. */
|
|
static inline __sum16 csum_fold(__wsum sum)
|
|
{
|
|
unsigned int tmp;
|
|
|
|
__asm__ __volatile__("addcc\t%0, %1, %1\n\t"
|
|
"srl\t%1, 16, %1\n\t"
|
|
"addx\t%1, %%g0, %1\n\t"
|
|
"xnor\t%%g0, %1, %0"
|
|
: "=&r" (sum), "=r" (tmp)
|
|
: "0" (sum), "1" ((__force u32)sum<<16)
|
|
: "cc");
|
|
return (__force __sum16)sum;
|
|
}
|
|
|
|
static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
|
|
unsigned short len,
|
|
unsigned short proto,
|
|
__wsum sum)
|
|
{
|
|
__asm__ __volatile__("addcc\t%1, %0, %0\n\t"
|
|
"addxcc\t%2, %0, %0\n\t"
|
|
"addxcc\t%3, %0, %0\n\t"
|
|
"addx\t%0, %%g0, %0\n\t"
|
|
: "=r" (sum), "=r" (saddr)
|
|
: "r" (daddr), "r" (proto + len), "0" (sum),
|
|
"1" (saddr)
|
|
: "cc");
|
|
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));
|
|
}
|
|
|
|
#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__ __volatile__ (
|
|
"addcc %3, %4, %%g4\n\t"
|
|
"addxcc %5, %%g4, %%g4\n\t"
|
|
"ld [%2 + 0x0c], %%g2\n\t"
|
|
"ld [%2 + 0x08], %%g3\n\t"
|
|
"addxcc %%g2, %%g4, %%g4\n\t"
|
|
"ld [%2 + 0x04], %%g2\n\t"
|
|
"addxcc %%g3, %%g4, %%g4\n\t"
|
|
"ld [%2 + 0x00], %%g3\n\t"
|
|
"addxcc %%g2, %%g4, %%g4\n\t"
|
|
"ld [%1 + 0x0c], %%g2\n\t"
|
|
"addxcc %%g3, %%g4, %%g4\n\t"
|
|
"ld [%1 + 0x08], %%g3\n\t"
|
|
"addxcc %%g2, %%g4, %%g4\n\t"
|
|
"ld [%1 + 0x04], %%g2\n\t"
|
|
"addxcc %%g3, %%g4, %%g4\n\t"
|
|
"ld [%1 + 0x00], %%g3\n\t"
|
|
"addxcc %%g2, %%g4, %%g4\n\t"
|
|
"addxcc %%g3, %%g4, %0\n\t"
|
|
"addx 0, %0, %0\n"
|
|
: "=&r" (sum)
|
|
: "r" (saddr), "r" (daddr),
|
|
"r"(htonl(len)), "r"(htonl(proto)), "r"(sum)
|
|
: "g2", "g3", "g4", "cc");
|
|
|
|
return csum_fold(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 /* !(__SPARC_CHECKSUM_H) */
|