LXR uboot/arch/powerpc/lib/stack.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (c) 2015 Andreas Bießmann <andreas@biessmann.org>
   4 *
   5 * Copyright (c) 2011 The Chromium OS Authors.
   6 * (C) Copyright 2002-2006
   7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   8 *
   9 * (C) Copyright 2002
  10 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  11 * Marius Groeger <mgroeger@sysgo.de>
  12 */
  13#include <common.h>
  14#include <init.h>
  15#include <asm/global_data.h>
  16
  17DECLARE_GLOBAL_DATA_PTR;
  18
  19int arch_reserve_stacks(void)
  20{
  21        ulong *s;
  22
  23        /* setup stack pointer for exceptions */
  24        gd->irq_sp = gd->start_addr_sp;
  25
  26        /* Clear initial stack frame */
  27        s = (ulong *)gd->start_addr_sp;
  28        *s = 0; /* Terminate back chain */
  29        *++s = 0; /* NULL return address */
  30
  31        return 0;
  32}
  33