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/arm/cpu/armv7m/cpu.c

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/*
* (C) Copyright 2010,2011
* Vladimir Khusainov, Emcraft Systems, vlad@emcraft.com
*
* (C) Copyright 2015
* Kamil Lulko, <kamil.lulko@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/armv7m.h>
/*
* This is called right before passing control to
* the Linux kernel point.
*/
int cleanup_before_linux(void)
{
return 0;
}
/*
* Perform the low-level reset.
*/
void reset_cpu(ulong addr)
{
/*
* Perform reset but keep priority group unchanged.
*/
writel((V7M_AIRCR_VECTKEY << V7M_AIRCR_VECTKEY_SHIFT)
| (V7M_SCB->aircr & V7M_AIRCR_PRIGROUP_MSK)
| V7M_AIRCR_SYSRESET, &V7M_SCB->aircr);
}