upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/arch/nds32/include/asm/string.h

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/*
* Copyright (C) 2011 Andes Technology Corporation
* Copyright (C) 2010 Shawn Lin (nobuhiro@andestech.com)
* Copyright (C) 2011 Macpaul Lin (macpaul@andestech.com)
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef __ASM_NDS_STRING_H
#define __ASM_NDS_STRING_H
/*
* We don't do inline string functions, since the
* optimised inline asm versions are not small.
*/
#undef __HAVE_ARCH_STRRCHR
extern char *strrchr(const char *s, int c);
#undef __HAVE_ARCH_STRCHR
extern char *strchr(const char *s, int c);
#undef __HAVE_ARCH_MEMCPY
extern void *memcpy(void *, const void *, __kernel_size_t);
#undef __HAVE_ARCH_MEMMOVE
extern void *memmove(void *, const void *, __kernel_size_t);
#undef __HAVE_ARCH_MEMCHR
extern void *memchr(const void *, int, __kernel_size_t);
#undef __HAVE_ARCH_MEMZERO
#undef __HAVE_ARCH_MEMSET
extern void *memset(void *, int, __kernel_size_t);
#ifdef CONFIG_MARCO_MEMSET
extern void __memzero(void *ptr, __kernel_size_t n);
#define memset(p, v, n) \
({ \
if ((n) != 0) { \
if (__builtin_constant_p((v)) && (v) == 0) \
__memzero((p), (n)); \
else \
memset((p), (v), (n)); \
} \
(p); \
})
#define memzero(p, n) ({ if ((n) != 0) __memzero((p), (n)); (p); })
#else
extern void memzero(void *ptr, __kernel_size_t n);
#endif
#endif /* __ASM_NDS_STRING_H */