diff options
| -rw-r--r-- | arch/m68k/Kconfig | 3 | ||||
| -rw-r--r-- | arch/m68k/Kconfig.cpu | 2 | ||||
| -rw-r--r-- | arch/m68k/include/asm/checksum.h | 31 | ||||
| -rw-r--r-- | arch/m68k/lib/Makefile | 8 | ||||
| -rw-r--r-- | arch/m68k/lib/checksum.c (renamed from arch/m68k/lib/checksum_mm.c) | 0 | ||||
| -rw-r--r-- | arch/m68k/lib/checksum_no.c | 156 |
6 files changed, 16 insertions, 184 deletions
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index 2914b03..2fe2d63 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -40,6 +40,9 @@ config GENERIC_CALIBRATE_DELAY config GENERIC_IOMAP def_bool MMU +config GENERIC_CSUM + bool + config TIME_LOW_RES bool default y diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu index 9af9e68..17d37ed 100644 --- a/arch/m68k/Kconfig.cpu +++ b/arch/m68k/Kconfig.cpu @@ -3,6 +3,7 @@ comment "Processor Type" config M68000 bool select CPU_HAS_NO_BITFIELDS + select GENERIC_CSUM help The Freescale (was Motorola) 68000 CPU is the first generation of the well known M68K family of processors. The CPU core as well as @@ -23,6 +24,7 @@ config COLDFIRE select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB select CPU_HAS_NO_BITFIELDS + select GENERIC_CSUM help The Freescale ColdFire family of processors is a modern derivitive of the 68000 processor family. They are mainly targeted at embedded diff --git a/arch/m68k/include/asm/checksum.h b/arch/m68k/include/asm/checksum.h index ec51448..2f88d86 100644 --- a/arch/m68k/include/asm/checksum.h +++ b/arch/m68k/include/asm/checksum.h @@ -3,6 +3,10 @@ #include <linux/in6.h> +#ifdef CONFIG_GENERIC_CSUM +#include <asm-generic/checksum.h> +#else + /* * computes the checksum of a memory block at buff, length len, * and adds in "sum" (32-bit) @@ -34,30 +38,6 @@ extern __wsum csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum); - -#ifdef CONFIG_COLDFIRE - -/* - * The ColdFire cores don't support all the 68k instructions used - * in the optimized checksum code below. So it reverts back to using - * more standard C coded checksums. The fast checksum code is - * significantly larger than the optimized version, so it is not - * inlined here. - */ -__sum16 ip_fast_csum(const void *iph, unsigned int ihl); - -static inline __sum16 csum_fold(__wsum sum) -{ - unsigned int tmp = (__force u32)sum; - - tmp = (tmp & 0xffff) + (tmp >> 16); - tmp = (tmp & 0xffff) + (tmp >> 16); - - return (__force __sum16)~tmp; -} - -#else - /* * This is a version of ip_fast_csum() optimized for IP headers, * which always checksum on 4 octet boundaries. @@ -97,8 +77,6 @@ static inline __sum16 csum_fold(__wsum sum) return (__force __sum16)~sum; } -#endif /* CONFIG_COLDFIRE */ - static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, unsigned short proto, __wsum sum) @@ -167,4 +145,5 @@ csum_ipv6_magic(const struct in6_addr *saddr, const struct in6_addr *daddr, return csum_fold(sum); } +#endif /* CONFIG_GENERIC_CSUM */ #endif /* _M68K_CHECKSUM_H */ diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile index 1a1bd90..b3b40e4 100644 --- a/arch/m68k/lib/Makefile +++ b/arch/m68k/lib/Makefile @@ -7,8 +7,12 @@ lib-y := ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \ memcpy.o memset.o memmove.o ifdef CONFIG_MMU -lib-y += string.o uaccess.o checksum_mm.o +lib-y += string.o uaccess.o else -lib-y += mulsi3.o divsi3.o udivsi3.o modsi3.o umodsi3.o checksum_no.o +lib-y += mulsi3.o divsi3.o udivsi3.o modsi3.o umodsi3.o +endif + +ifndef CONFIG_GENERIC_CSUM +lib-y += checksum.o endif diff --git a/arch/m68k/lib/checksum_mm.c b/arch/m68k/lib/checksum.c index 6216f12..6216f12 100644 --- a/arch/m68k/lib/checksum_mm.c +++ b/arch/m68k/lib/checksum.c diff --git a/arch/m68k/lib/checksum_no.c b/arch/m68k/lib/checksum_no.c deleted file mode 100644 index e4c6354..0000000 --- a/arch/m68k/lib/checksum_no.c +++ /dev/null @@ -1,156 +0,0 @@ -/* - * INET 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. - * - * IP/TCP/UDP checksumming routines - * - * Authors: Jorge Cwik, <jorge@laser.satlink.net> - * Arnt Gulbrandsen, <agulbra@nvg.unit.no> - * Tom May, <ftom@netcom.com> - * Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de> - * Lots of code moved from tcp.c and ip.c; see those files - * for more names. - * - * 03/02/96 Jes Sorensen, Andreas Schwab, Roman Hodek: - * Fixed some nasty bugs, causing some horrible crashes. - * A: At some points, the sum (%0) was used as - * length-counter instead of the length counter - * (%1). Thanks to Roman Hodek for pointing this out. - * B: GCC seems to mess up if one uses too many - * data-registers to hold input values and one tries to - * specify d0 and d1 as scratch registers. Letting gcc choose these - * registers itself solves the problem. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -/* Revised by Kenneth Albanowski for m68knommu. Basic problem: unaligned access kills, so most - of the assembly has to go. */ - -#include <linux/module.h> -#include <net/checksum.h> - -static inline unsigned short from32to16(unsigned long x) -{ - /* add up 16-bit and 16-bit for 16+c bit */ - x = (x & 0xffff) + (x >> 16); - /* add up carry.. */ - x = (x & 0xffff) + (x >> 16); - return x; -} - -static unsigned long do_csum(const unsigned char * buff, int len) -{ - int odd, count; - unsigned long result = 0; - - if (len <= 0) - goto out; - odd = 1 & (unsigned long) buff; - if (odd) { - result = *buff; - len--; - buff++; - } - count = len >> 1; /* nr of 16-bit words.. */ - if (count) { - if (2 & (unsigned long) buff) { - result += *(unsigned short *) buff; - count--; - len -= 2; - buff += 2; - } - count >>= 1; /* nr of 32-bit words.. */ - if (count) { - unsigned long carry = 0; - do { - unsigned long w = *(unsigned long *) buff; - count--; - buff += 4; - result += carry; - result += w; - carry = (w > result); - } while (count); - result += carry; - result = (result & 0xffff) + (result >> 16); - } - if (len & 2) { - result += *(unsigned short *) buff; - buff += 2; - } - } - if (len & 1) - result += (*buff << 8); - result = from32to16(result); - if (odd) - result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); -out: - return result; -} - -#ifdef CONFIG_COLDFIRE -/* - * This is a version of ip_compute_csum() optimized for IP headers, - * which always checksum on 4 octet boundaries. - */ -__sum16 ip_fast_csum(const void *iph, unsigned int ihl) -{ - return (__force __sum16)~do_csum(iph,ihl*4); -} -EXPORT_SYMBOL(ip_fast_csum); -#endif - -/* - * 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) -{ - unsigned int result = do_csum(buff, len); - - /* add in old sum, and carry.. */ - result += (__force u32)sum; - if ((__force u32)sum > result) - result += 1; - return (__force __wsum)result; -} - -EXPORT_SYMBOL(csum_partial); - -/* - * 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 const 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_nocheck(const void *src, void *dst, int len, __wsum sum) -{ - memcpy(dst, src, len); - return csum_partial(dst, len, sum); -} -EXPORT_SYMBOL(csum_partial_copy_nocheck); |
