diff options
Diffstat (limited to 'include/asm-arm26/checksum.h')
| -rw-r--r-- | include/asm-arm26/checksum.h | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/include/asm-arm26/checksum.h b/include/asm-arm26/checksum.h deleted file mode 100644 index f2b4b0a403b..00000000000 --- a/include/asm-arm26/checksum.h +++ /dev/null @@ -1,151 +0,0 @@ -/* - * linux/include/asm-arm/checksum.h - * - * IP checksum routines - * - * Copyright (C) Original authors of ../asm-i386/checksum.h - * Copyright (C) 1996-1999 Russell King - */ -#ifndef __ASM_ARM_CHECKSUM_H -#define __ASM_ARM_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, 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 - */ - -__wsum -csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum); - -__wsum -csum_partial_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *err_ptr); - -/* - * 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, tmp1; - - __asm__ __volatile__( - "ldr %0, [%1], #4 @ ip_fast_csum \n\ - ldr %3, [%1], #4 \n\ - sub %2, %2, #5 \n\ - adds %0, %0, %3 \n\ - ldr %3, [%1], #4 \n\ - adcs %0, %0, %3 \n\ - ldr %3, [%1], #4 \n\ -1: adcs %0, %0, %3 \n\ - ldr %3, [%1], #4 \n\ - tst %2, #15 @ do this carefully \n\ - subne %2, %2, #1 @ without destroying \n\ - bne 1b @ the carry flag \n\ - adcs %0, %0, %3 \n\ - adc %0, %0, #0 \n\ - adds %0, %0, %0, lsl #16 \n\ - addcs %0, %0, #0x10000 \n\ - mvn %0, %0 \n\ - mov %0, %0, lsr #16" - : "=r" (sum), "=r" (iph), "=r" (ihl), "=r" (tmp1) - : "1" (iph), "2" (ihl) - : "cc"); - return (__force __sum16)sum; -} - -/* - * Fold a partial checksum without adding pseudo headers - */ -static inline __sum16 csum_fold(__wsum sum) -{ - __asm__( - "adds %0, %1, %1, lsl #16 @ csum_fold \n\ - addcs %0, %0, #0x10000" - : "=r" (sum) - : "r" (sum) - : "cc"); - return (__force __sum16)(~(__force u32)sum >> 16); -} - -static inline __wsum -csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, - unsigned short proto, __wsum sum) -{ - __asm__( - "adds %0, %1, %2 @ csum_tcpudp_nofold \n\ - adcs %0, %0, %3 \n\ - adcs %0, %0, %4 \n\ - adcs %0, %0, %5 \n\ - adc %0, %0, #0" - : "=&r"(sum) - : "r" (sum), "r" (daddr), "r" (saddr), "r" (htons(len)), "Ir" (htons(proto)) - : "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) -{ - __asm__( - "adds %0, %1, %2 @ csum_tcpudp_magic \n\ - adcs %0, %0, %3 \n\ - adcs %0, %0, %4 \n\ - adcs %0, %0, %5 \n\ - adc %0, %0, #0 \n\ - adds %0, %0, %0, lsl #16 \n\ - addcs %0, %0, #0x10000 \n\ - mvn %0, %0" - : "=&r"(sum) - : "r" (sum), "r" (daddr), "r" (saddr), "r" (htons(len)), "Ir" (htons(proto)) - : "cc"); - return (__force __sum16)((__force u32)sum >> 16); -} - - -/* - * 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 -extern __wsum -__csum_ipv6_magic(const struct in6_addr *saddr, const struct in6_addr *daddr, __be32 len, - __be32 proto, __wsum sum); - -static inline __sum16 -csum_ipv6_magic(const struct in6_addr *saddr, const struct in6_addr *daddr, __u32 len, - unsigned short proto, __wsum sum) -{ - return csum_fold(__csum_ipv6_magic(saddr, daddr, htonl(len), - htonl(proto), sum)); -} -#endif |