summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--arch/m68k/Kconfig3
-rw-r--r--arch/m68k/Kconfig.cpu2
-rw-r--r--arch/m68k/include/asm/checksum.h31
-rw-r--r--arch/m68k/lib/Makefile8
-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.c156
6 files changed, 16 insertions, 184 deletions
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 2914b036d76e..2fe2d633fe08 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 9af9e68c303b..17d37ed57f3c 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 ec514485c8b6..2f88d867c711 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 1a1bd9067e90..b3b40e4ed339 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 6216f12a756b..6216f12a756b 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 e4c6354da765..000000000000
--- 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);