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/x86/include/asm/cache.h

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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __X86_CACHE_H__
#define __X86_CACHE_H__
/*
* If CONFIG_SYS_CACHELINE_SIZE is defined use it for DMA alignment. Otherwise
* use 64-bytes, a safe default for x86.
*/
#ifdef CONFIG_SYS_CACHELINE_SIZE
#define ARCH_DMA_MINALIGN CONFIG_SYS_CACHELINE_SIZE
#else
#define ARCH_DMA_MINALIGN 64
#endif
static inline void wbinvd(void)
{
asm volatile ("wbinvd" : : : "memory");
}
static inline void invd(void)
{
asm volatile("invd" : : : "memory");
}
/* Enable caches and write buffer */
void enable_caches(void);
/* Disable caches and write buffer */
void disable_caches(void);
#endif /* __X86_CACHE_H__ */