diff options
Diffstat (limited to 'arch/powerpc/lib/stack.c')
| -rw-r--r-- | arch/powerpc/lib/stack.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/powerpc/lib/stack.c b/arch/powerpc/lib/stack.c new file mode 100644 index 00000000000..2e731aa8701 --- /dev/null +++ b/arch/powerpc/lib/stack.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2015 Andreas Bießmann <andreas@biessmann.org> + * + * Copyright (c) 2011 The Chromium OS Authors. + * (C) Copyright 2002-2006 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + */ +#include <common.h> +#include <init.h> +#include <asm/global_data.h> +#include <asm/mp.h> + +DECLARE_GLOBAL_DATA_PTR; + +int arch_reserve_stacks(void) +{ + ulong *s; + + /* setup stack pointer for exceptions */ + gd->irq_sp = gd->start_addr_sp; + + /* Clear initial stack frame */ + s = (ulong *)gd->start_addr_sp; + *s = 0; /* Terminate back chain */ + *++s = 0; /* NULL return address */ + + return 0; +} + +int arch_setup_dest_addr(void) +{ +#if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500)) + /* + * We need to make sure the location we intend to put secondary core + * boot code is reserved and not used by any part of u-boot + */ + if (gd->relocaddr > determine_mp_bootpg(NULL)) { + gd->relocaddr = determine_mp_bootpg(NULL); + debug("Reserving MP boot page to %08lx\n", gd->relocaddr); + } +#endif + + return 0; +} |