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/xtensa/include/asm/system.h

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/*
* Copyright (C) 2016 Cadence Design Systems Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _XTENSA_SYSTEM_H
#define _XTENSA_SYSTEM_H
#include <asm/arch/core.h>
#if XCHAL_HAVE_INTERRUPTS
#define local_irq_save(flags) \
__asm__ __volatile__ ("rsil %0, %1" \
: "=a"(flags) \
: "I"(XCHAL_EXCM_LEVEL) \
: "memory")
#define local_irq_restore(flags) \
__asm__ __volatile__ ("wsr %0, ps\n\t" \
"rsync" \
:: "a"(flags) : "memory")
#else
#define local_irq_save(flags) ((void)(flags))
#define local_irq_restore(flags) ((void)(flags))
#endif
#endif