diff options
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/Kconfig | 3 | ||||
| -rw-r--r-- | arch/blackfin/include/asm/checksum.h | 70 | ||||
| -rw-r--r-- | arch/blackfin/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/blackfin/lib/checksum.c | 125 |
4 files changed, 8 insertions, 192 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index ae6a60f10120..c0d444535611 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -28,6 +28,9 @@ config BLACKFIN select HAVE_OPROFILE select ARCH_WANT_OPTIONAL_GPIOLIB +config GENERIC_CSUM + def_bool y + config GENERIC_BUG def_bool y depends on BUG diff --git a/arch/blackfin/include/asm/checksum.h b/arch/blackfin/include/asm/checksum.h index a23415be0de1..623cc7fb00bc 100644 --- a/arch/blackfin/include/asm/checksum.h +++ b/arch/blackfin/include/asm/checksum.h @@ -9,63 +9,12 @@ #define _BFIN_CHECKSUM_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(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); - -#define csum_partial_copy_nocheck(src, dst, len, sum) \ - csum_partial_copy((src), (dst), (len), (sum)) - -__sum16 ip_fast_csum(unsigned char *iph, unsigned int ihl); - -/* - * Fold a partial checksum - */ - -static inline __sum16 csum_fold(__wsum sum) -{ - while (sum >> 16) - sum = (sum & 0xffff) + (sum >> 16); - return ((~(sum << 16)) >> 16); -} - -/* * 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, +__csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, unsigned short proto, __wsum sum) { unsigned int carry; @@ -88,19 +37,8 @@ csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, return (sum); } +#define csum_tcpudp_nofold __csum_tcpudp_nofold -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); +#include <asm-generic/checksum.h> -#endif /* _BFIN_CHECKSUM_H */ +#endif diff --git a/arch/blackfin/lib/Makefile b/arch/blackfin/lib/Makefile index 635288fc5f54..42c47dc9e12f 100644 --- a/arch/blackfin/lib/Makefile +++ b/arch/blackfin/lib/Makefile @@ -5,7 +5,7 @@ lib-y := \ ashldi3.o ashrdi3.o lshrdi3.o \ muldi3.o divsi3.o udivsi3.o modsi3.o umodsi3.o \ - checksum.o memcpy.o memset.o memcmp.o memchr.o memmove.o \ + memcpy.o memset.o memcmp.o memchr.o memmove.o \ strcmp.o strcpy.o strncmp.o strncpy.o \ umulsi3_highpart.o smulsi3_highpart.o \ ins.o outs.o diff --git a/arch/blackfin/lib/checksum.c b/arch/blackfin/lib/checksum.c deleted file mode 100644 index c62969dc1bbb..000000000000 --- a/arch/blackfin/lib/checksum.c +++ /dev/null @@ -1,125 +0,0 @@ -/* - * Copyright 2004-2009 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - * - * An implementation of the TCP/IP protocol suite for the LINUX operating - * system. INET is implemented using the BSD Socket interface as the - * means of communication with the user level. - * - */ - -#include <linux/module.h> -#include <net/checksum.h> -#include <asm/checksum.h> - -#ifdef CONFIG_IP_CHECKSUM_L1 -static unsigned short do_csum(const unsigned char *buff, int len)__attribute__((l1_text)); -#endif - -static unsigned short do_csum(const unsigned char *buff, int len) -{ - register unsigned long sum = 0; - int swappem = 0; - - if (1 & (unsigned long)buff) { - sum = *buff << 8; - buff++; - len--; - ++swappem; - } - - while (len > 1) { - sum += *(unsigned short *)buff; - buff += 2; - len -= 2; - } - - if (len > 0) - sum += *buff; - - /* Fold 32-bit sum to 16 bits */ - while (sum >> 16) - sum = (sum & 0xffff) + (sum >> 16); - - if (swappem) - sum = ((sum & 0xff00) >> 8) + ((sum & 0x00ff) << 8); - - return sum; - -} - -/* - * This is a version of ip_compute_csum() optimized for IP headers, - * which always checksum on 4 octet boundaries. - */ -__sum16 ip_fast_csum(unsigned char *iph, unsigned int ihl) -{ - return (__force __sum16)~do_csum(iph, ihl * 4); -} -EXPORT_SYMBOL(ip_fast_csum); - -/* - * 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) -{ - /* - * Just in case we get nasty checksum data... - * Like 0xffff6ec3 in the case of our IPv6 multicast header. - * We fold to begin with, as well as at the end. - */ - sum = (sum & 0xffff) + (sum >> 16); - - sum += do_csum(buff, len); - - sum = (sum & 0xffff) + (sum >> 16); - - return 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); -} -EXPORT_SYMBOL(ip_compute_csum); - -/* - * copy from fs while checksumming, otherwise like csum_partial - */ - -__wsum -csum_partial_copy_from_user(const void __user *src, void *dst, - int len, __wsum sum, int *csum_err) -{ - if (csum_err) - *csum_err = 0; - memcpy(dst, (__force void *)src, len); - return csum_partial(dst, len, sum); -} -EXPORT_SYMBOL(csum_partial_copy_from_user); - -/* - * copy from ds while checksumming, otherwise like csum_partial - */ - -__wsum csum_partial_copy(const void *src, void *dst, int len, __wsum sum) -{ - memcpy(dst, src, len); - return csum_partial(dst, len, sum); -} -EXPORT_SYMBOL(csum_partial_copy); |