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authorDavid Howells <dhowells@redhat.com>2006-01-08 01:01:19 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:13:36 -0800
commit402344012ebe696d9353bbf056889ddaaec83079 (patch)
tree4a4072bdfe80be4c565d01a9188ef5da3a31e19a /arch/frv/lib
parent8369ce4cfe18decc3ea0afcf91e67c665479c78e (diff)
downloadvexpress-lsk-402344012ebe696d9353bbf056889ddaaec83079.tar.gz
[PATCH] frv: implement and export various things required by modules
Export a number of features required to build all the modules. It also implements the following simple features: (*) csum_partial_copy_from_user() for MMU as well as no-MMU. (*) __ucmpdi2(). so that they can be exported too. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/frv/lib')
-rw-r--r--arch/frv/lib/Makefile2
-rw-r--r--arch/frv/lib/__ucmpdi2.S45
-rw-r--r--arch/frv/lib/checksum.c31
3 files changed, 71 insertions, 7 deletions
diff --git a/arch/frv/lib/Makefile b/arch/frv/lib/Makefile
index 19be2626d5e..08be305c9f4 100644
--- a/arch/frv/lib/Makefile
+++ b/arch/frv/lib/Makefile
@@ -3,6 +3,6 @@
#
lib-y := \
- __ashldi3.o __lshrdi3.o __muldi3.o __ashrdi3.o __negdi2.o \
+ __ashldi3.o __lshrdi3.o __muldi3.o __ashrdi3.o __negdi2.o __ucmpdi2.o \
checksum.o memcpy.o memset.o atomic-ops.o \
outsl_ns.o outsl_sw.o insl_ns.o insl_sw.o cache.o
diff --git a/arch/frv/lib/__ucmpdi2.S b/arch/frv/lib/__ucmpdi2.S
new file mode 100644
index 00000000000..d892f16ffaa
--- /dev/null
+++ b/arch/frv/lib/__ucmpdi2.S
@@ -0,0 +1,45 @@
+/* __ucmpdi2.S: 64-bit unsigned compare
+ *
+ * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * 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.
+ */
+
+
+ .text
+ .p2align 4
+
+###############################################################################
+#
+# int __ucmpdi2(unsigned long long a [GR8:GR9],
+# unsigned long long b [GR10:GR11])
+#
+# - returns 0, 1, or 2 as a <, =, > b respectively.
+#
+###############################################################################
+ .globl __ucmpdi2
+ .type __ucmpdi2,@function
+__ucmpdi2:
+ or.p gr8,gr0,gr4
+ subcc gr8,gr10,gr0,icc0
+ setlos.p #0,gr8
+ bclr icc0,#2 ; a.msw < b.msw
+
+ setlos.p #2,gr8
+ bhilr icc0,#0 ; a.msw > b.msw
+
+ subcc.p gr9,gr11,gr0,icc1
+ setlos #0,gr8
+ setlos.p #2,gr9
+ setlos #1,gr7
+ cknc icc1,cc6
+ cor.p gr9,gr0,gr8, cc6,#1
+ cckls icc1,cc4, cc6,#1
+ andcr cc6,cc4,cc4
+ cor gr7,gr0,gr8, cc4,#1
+ bralr
+ .size __ucmpdi2, .-__ucmpdi2
diff --git a/arch/frv/lib/checksum.c b/arch/frv/lib/checksum.c
index 7bf5bd6cac8..20e7dfc474e 100644
--- a/arch/frv/lib/checksum.c
+++ b/arch/frv/lib/checksum.c
@@ -33,6 +33,7 @@
#include <net/checksum.h>
#include <asm/checksum.h>
+#include <linux/module.h>
static inline unsigned short from32to16(unsigned long x)
{
@@ -115,34 +116,52 @@ unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
return result;
}
+EXPORT_SYMBOL(csum_partial);
+
/*
* this routine is used for miscellaneous IP-like checksums, mainly
* in icmp.c
*/
unsigned short ip_compute_csum(const unsigned char * buff, int len)
{
- return ~do_csum(buff,len);
+ return ~do_csum(buff, len);
}
+EXPORT_SYMBOL(ip_compute_csum);
+
/*
* copy from fs while checksumming, otherwise like csum_partial
*/
-
unsigned int
-csum_partial_copy_from_user(const char *src, char *dst, int len, int sum, int *csum_err)
+csum_partial_copy_from_user(const char __user *src, char *dst,
+ int len, int sum, int *csum_err)
{
- if (csum_err) *csum_err = 0;
- memcpy(dst, src, len);
+ int rem;
+
+ if (csum_err)
+ *csum_err = 0;
+
+ rem = copy_from_user(dst, src, len);
+ if (rem != 0) {
+ if (csum_err)
+ *csum_err = -EFAULT;
+ memset(dst + len - rem, 0, rem);
+ len = rem;
+ }
+
return csum_partial(dst, len, sum);
}
+EXPORT_SYMBOL(csum_partial_copy_from_user);
+
/*
* copy from ds while checksumming, otherwise like csum_partial
*/
-
unsigned int
csum_partial_copy(const char *src, char *dst, int len, int sum)
{
memcpy(dst, src, len);
return csum_partial(dst, len, sum);
}
+
+EXPORT_SYMBOL(csum_partial_copy);