jcs.org
"Das U-Boot" Source Tree
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 <init.h>
14#include <asm/global_data.h>
15#include <asm/mp.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
34int arch_setup_dest_addr(void)
35{
36#if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
37 /*
38 * We need to make sure the location we intend to put secondary core
39 * boot code is reserved and not used by any part of u-boot
40 */
41 if (gd->relocaddr > determine_mp_bootpg(NULL)) {
42 gd->relocaddr = determine_mp_bootpg(NULL);
43 debug("Reserving MP boot page to %08lx\n", gd->relocaddr);
44 }
45#endif
46
47 return 0;
48}