2 * (C) Copyright 2010,2011
3 * Vladimir Khusainov, Emcraft Systems, vlad@emcraft.com
6 * Kamil Lulko, <kamil.lulko@gmail.com>
8 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/armv7m.h>
16 * This is called right before passing control to
17 * the Linux kernel point.
19 int cleanup_before_linux(void)
22 * this function is called just before we call linux
23 * it prepares the processor for linux
25 * disable interrupt and turn off caches etc ...
30 * dcache_disable() in turn flushes the d-cache
31 * MPU is still enabled & can't be disabled as the u-boot
32 * code might be running in sdram which by default is not
36 /* invalidate to make sure no cache line gets dirty between
37 * dcache flushing and disabling dcache */
38 invalidate_dcache_all();
44 * Perform the low-level reset.
46 void reset_cpu(ulong addr)
49 * Perform reset but keep priority group unchanged.
51 writel((V7M_AIRCR_VECTKEY << V7M_AIRCR_VECTKEY_SHIFT)
52 | (V7M_SCB->aircr & V7M_AIRCR_PRIGROUP_MSK)
53 | V7M_AIRCR_SYSRESET, &V7M_SCB->aircr);