xref: /openbmc/u-boot/arch/arm/lib/stack.c (revision e91610da)
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 
15 DECLARE_GLOBAL_DATA_PTR;
16 
17 int arch_reserve_stacks(void)
18 {
19 #ifdef CONFIG_SPL_BUILD
20 	gd->start_addr_sp -= 128;	/* leave 32 words for abort-stack */
21 	gd->irq_sp = gd->start_addr_sp;
22 #else
23 	/* setup stack pointer for exceptions */
24 	gd->irq_sp = gd->start_addr_sp;
25 
26 # if !defined(CONFIG_ARM64)
27 	/* leave 3 words for abort-stack, plus 1 for alignment */
28 	gd->start_addr_sp -= 16;
29 # endif
30 #endif
31 
32 	return 0;
33 }
34