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Diffstat (limited to 'ANDROID_3.4.5/arch/x86/lib/csum-wrappers_64.c')
-rw-r--r--ANDROID_3.4.5/arch/x86/lib/csum-wrappers_64.c150
1 files changed, 0 insertions, 150 deletions
diff --git a/ANDROID_3.4.5/arch/x86/lib/csum-wrappers_64.c b/ANDROID_3.4.5/arch/x86/lib/csum-wrappers_64.c
deleted file mode 100644
index 459b58a8..00000000
--- a/ANDROID_3.4.5/arch/x86/lib/csum-wrappers_64.c
+++ /dev/null
@@ -1,150 +0,0 @@
-/*
- * Copyright 2002, 2003 Andi Kleen, SuSE Labs.
- * Subject to the GNU Public License v.2
- *
- * Wrappers of assembly checksum functions for x86-64.
- */
-#include <asm/checksum.h>
-#include <linux/module.h>
-
-/**
- * csum_partial_copy_from_user - Copy and checksum from user space.
- * @src: source address (user space)
- * @dst: destination address
- * @len: number of bytes to be copied.
- * @isum: initial sum that is added into the result (32bit unfolded)
- * @errp: set to -EFAULT for an bad source address.
- *
- * Returns an 32bit unfolded checksum of the buffer.
- * src and dst are best aligned to 64bits.
- */
-__wsum
-csum_partial_copy_from_user(const void __user *src, void *dst,
- int len, __wsum isum, int *errp)
-{
- might_sleep();
- *errp = 0;
-
- if (!likely(access_ok(VERIFY_READ, src, len)))
- goto out_err;
-
- /*
- * Why 6, not 7? To handle odd addresses aligned we
- * would need to do considerable complications to fix the
- * checksum which is defined as an 16bit accumulator. The
- * fix alignment code is primarily for performance
- * compatibility with 32bit and that will handle odd
- * addresses slowly too.
- */
- if (unlikely((unsigned long)src & 6)) {
- while (((unsigned long)src & 6) && len >= 2) {
- __u16 val16;
-
- *errp = __get_user(val16, (const __u16 __user *)src);
- if (*errp)
- return isum;
-
- *(__u16 *)dst = val16;
- isum = (__force __wsum)add32_with_carry(
- (__force unsigned)isum, val16);
- src += 2;
- dst += 2;
- len -= 2;
- }
- }
- isum = csum_partial_copy_generic((__force const void *)src,
- dst, len, isum, errp, NULL);
- if (unlikely(*errp))
- goto out_err;
-
- return isum;
-
-out_err:
- *errp = -EFAULT;
- memset(dst, 0, len);
-
- return isum;
-}
-EXPORT_SYMBOL(csum_partial_copy_from_user);
-
-/**
- * csum_partial_copy_to_user - Copy and checksum to user space.
- * @src: source address
- * @dst: destination address (user space)
- * @len: number of bytes to be copied.
- * @isum: initial sum that is added into the result (32bit unfolded)
- * @errp: set to -EFAULT for an bad destination address.
- *
- * Returns an 32bit unfolded checksum of the buffer.
- * src and dst are best aligned to 64bits.
- */
-__wsum
-csum_partial_copy_to_user(const void *src, void __user *dst,
- int len, __wsum isum, int *errp)
-{
- might_sleep();
-
- if (unlikely(!access_ok(VERIFY_WRITE, dst, len))) {
- *errp = -EFAULT;
- return 0;
- }
-
- if (unlikely((unsigned long)dst & 6)) {
- while (((unsigned long)dst & 6) && len >= 2) {
- __u16 val16 = *(__u16 *)src;
-
- isum = (__force __wsum)add32_with_carry(
- (__force unsigned)isum, val16);
- *errp = __put_user(val16, (__u16 __user *)dst);
- if (*errp)
- return isum;
- src += 2;
- dst += 2;
- len -= 2;
- }
- }
-
- *errp = 0;
- return csum_partial_copy_generic(src, (void __force *)dst,
- len, isum, NULL, errp);
-}
-EXPORT_SYMBOL(csum_partial_copy_to_user);
-
-/**
- * csum_partial_copy_nocheck - Copy and checksum.
- * @src: source address
- * @dst: destination address
- * @len: number of bytes to be copied.
- * @isum: initial sum that is added into the result (32bit unfolded)
- *
- * Returns an 32bit unfolded checksum of the buffer.
- */
-__wsum
-csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
-{
- return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);
-}
-EXPORT_SYMBOL(csum_partial_copy_nocheck);
-
-__sum16 csum_ipv6_magic(const struct in6_addr *saddr,
- const struct in6_addr *daddr,
- __u32 len, unsigned short proto, __wsum sum)
-{
- __u64 rest, sum64;
-
- rest = (__force __u64)htonl(len) + (__force __u64)htons(proto) +
- (__force __u64)sum;
-
- asm(" addq (%[saddr]),%[sum]\n"
- " adcq 8(%[saddr]),%[sum]\n"
- " adcq (%[daddr]),%[sum]\n"
- " adcq 8(%[daddr]),%[sum]\n"
- " adcq $0,%[sum]\n"
-
- : [sum] "=r" (sum64)
- : "[sum]" (rest), [saddr] "r" (saddr), [daddr] "r" (daddr));
-
- return csum_fold(
- (__force __wsum)add32_with_carry(sum64 & 0xffffffff, sum64>>32));
-}
-EXPORT_SYMBOL(csum_ipv6_magic);