summaryrefslogtreecommitdiff
path: root/include/asm-m32r/checksum.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-m32r/checksum.h')
-rw-r--r--include/asm-m32r/checksum.h204
1 files changed, 0 insertions, 204 deletions
diff --git a/include/asm-m32r/checksum.h b/include/asm-m32r/checksum.h
deleted file mode 100644
index a7a7c4f44abe..000000000000
--- a/include/asm-m32r/checksum.h
+++ /dev/null
@@ -1,204 +0,0 @@
-#ifdef __KERNEL__
-#ifndef _ASM_M32R_CHECKSUM_H
-#define _ASM_M32R_CHECKSUM_H
-
-/*
- * include/asm-m32r/checksum.h
- *
- * IP/TCP/UDP checksum routines
- *
- * 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.
- *
- * Some code taken from mips and parisc architecture.
- *
- * Copyright (C) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata
- * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
- */
-
-#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.
- *
- * Here even more important to align src and dst on a 32-bit (or even
- * better 64-bit) boundary
- */
-extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
- int len, __wsum sum);
-
-/*
- * This is a new version of the above that records errors it finds in *errp,
- * but continues and zeros thre rest of the buffer.
- */
-extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
- int len, __wsum sum,
- int *err_ptr);
-
-/*
- * Fold a partial checksum
- */
-
-static inline __sum16 csum_fold(__wsum sum)
-{
- unsigned long tmpreg;
- __asm__(
- " sll3 %1, %0, #16 \n"
- " cmp %0, %0 \n"
- " addx %0, %1 \n"
- " ldi %1, #0 \n"
- " srli %0, #16 \n"
- " addx %0, %1 \n"
- " xor3 %0, %0, #0x0000ffff \n"
- : "=r" (sum), "=&r" (tmpreg)
- : "0" (sum)
- : "cbit"
- );
- return (__force __sum16)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 long tmpreg0, tmpreg1;
- __wsum sum;
-
- __asm__ __volatile__(
- " ld %0, @%1+ \n"
- " addi %2, #-4 \n"
- "# bgez %2, 2f \n"
- " cmp %0, %0 \n"
- " ld %3, @%1+ \n"
- " ld %4, @%1+ \n"
- " addx %0, %3 \n"
- " ld %3, @%1+ \n"
- " addx %0, %4 \n"
- " addx %0, %3 \n"
- " .fillinsn\n"
- "1: \n"
- " ld %4, @%1+ \n"
- " addi %2, #-1 \n"
- " addx %0, %4 \n"
- " bgtz %2, 1b \n"
- "\n"
- " ldi %3, #0 \n"
- " addx %0, %3 \n"
- " .fillinsn\n"
- "2: \n"
- /* 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" (tmpreg0), "=&r" (tmpreg1)
- : "1" (iph), "2" (ihl)
- : "cbit", "memory");
-
- return csum_fold(sum);
-}
-
-static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
- unsigned short len,
- unsigned short proto,
- __wsum sum)
-{
-#if defined(__LITTLE_ENDIAN)
- unsigned long len_proto = (proto + len) << 8;
-#else
- unsigned long len_proto = proto + len;
-#endif
- unsigned long tmpreg;
-
- __asm__(
- " cmp %0, %0 \n"
- " addx %0, %2 \n"
- " addx %0, %3 \n"
- " addx %0, %4 \n"
- " ldi %1, #0 \n"
- " addx %0, %1 \n"
- : "=r" (sum), "=&r" (tmpreg)
- : "r" (daddr), "r" (saddr), "r" (len_proto), "0" (sum)
- : "cbit"
- );
-
- 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 long tmpreg0, tmpreg1, tmpreg2, tmpreg3;
- __asm__(
- " ld %1, @(%5) \n"
- " ld %2, @(4,%5) \n"
- " ld %3, @(8,%5) \n"
- " ld %4, @(12,%5) \n"
- " add %0, %1 \n"
- " addx %0, %2 \n"
- " addx %0, %3 \n"
- " addx %0, %4 \n"
- " ld %1, @(%6) \n"
- " ld %2, @(4,%6) \n"
- " ld %3, @(8,%6) \n"
- " ld %4, @(12,%6) \n"
- " addx %0, %1 \n"
- " addx %0, %2 \n"
- " addx %0, %3 \n"
- " addx %0, %4 \n"
- " addx %0, %7 \n"
- " addx %0, %8 \n"
- " ldi %1, #0 \n"
- " addx %0, %1 \n"
- : "=&r" (sum), "=&r" (tmpreg0), "=&r" (tmpreg1),
- "=&r" (tmpreg2), "=&r" (tmpreg3)
- : "r" (saddr), "r" (daddr),
- "r" (htonl(len)), "r" (htonl(proto)), "0" (sum)
- : "cbit"
- );
-
- return csum_fold(sum);
-}
-
-#endif /* _ASM_M32R_CHECKSUM_H */
-#endif /* __KERNEL__ */