diff options
Diffstat (limited to 'include/asm-m32r/checksum.h')
| -rw-r--r-- | include/asm-m32r/checksum.h | 204 |
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__ */ |