arch/arm/cpu/armv7m/cpu.c

   1 /*
   2  * (C) Copyright 2010,2011
   3  * Vladimir Khusainov, Emcraft Systems, vlad@emcraft.com
   4  *
   5  * (C) Copyright 2015
   6  * Kamil Lulko, <rev13@wp.pl>
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <asm/io.h>
  13 #include <asm/armv7m.h>
  14
  15 /*
  16  * This is called right before passing control to
  17  * the Linux kernel point.
  18  */
  19 int cleanup_before_linux(void)
  20 {
  21         return 0;
  22 }
  23
  24 /*
  25  * Perform the low-level reset.
  26  */
  27 void reset_cpu(ulong addr)
  28 {
  29         /*
  30          * Perform reset but keep priority group unchanged.
  31          */
  32         writel((V7M_AIRCR_VECTKEY << V7M_AIRCR_VECTKEY_SHIFT)
  33                 | (V7M_SCB->aircr & V7M_AIRCR_PRIGROUP_MSK)
  34                 | V7M_AIRCR_SYSRESET, &V7M_SCB->aircr);
  35 }