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 
17 DECLARE_GLOBAL_DATA_PTR;
18 
arch_reserve_stacks(void)19 int 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