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 #include <asm/mp.h>
17 
18 DECLARE_GLOBAL_DATA_PTR;
19 
arch_reserve_stacks(void)20 int arch_reserve_stacks(void)
21 {
22 	ulong *s;
23 
24 	/* setup stack pointer for exceptions */
25 	gd->irq_sp = gd->start_addr_sp;
26 
27 	/* Clear initial stack frame */
28 	s = (ulong *)gd->start_addr_sp;
29 	*s = 0; /* Terminate back chain */
30 	*++s = 0; /* NULL return address */
31 
32 	return 0;
33 }
34 
arch_setup_dest_addr(void)35 int arch_setup_dest_addr(void)
36 {
37 #if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
38 	/*
39 	 * We need to make sure the location we intend to put secondary core
40 	 * boot code is reserved and not used by any part of u-boot
41 	 */
42 	if (gd->relocaddr > determine_mp_bootpg(NULL)) {
43 		gd->relocaddr = determine_mp_bootpg(NULL);
44 		debug("Reserving MP boot page to %08lx\n", gd->relocaddr);
45 	}
46 #endif
47 
48 	return 0;
49 }
50