stack.c 680 B

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  1. /*
  2. * Copyright (c) 2015 Andreas Bießmann <andreas@biessmann.org>
  3. *
  4. * Copyright (c) 2011 The Chromium OS Authors.
  5. * (C) Copyright 2002-2006
  6. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  7. *
  8. * (C) Copyright 2002
  9. * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  10. * Marius Groeger <mgroeger@sysgo.de>
  11. *
  12. * SPDX-License-Identifier: GPL-2.0+
  13. */
  14. #include <common.h>
  15. DECLARE_GLOBAL_DATA_PTR;
  16. int arch_reserve_stacks(void)
  17. {
  18. ulong *s;
  19. /* setup stack pointer for exceptions */
  20. gd->irq_sp = gd->start_addr_sp;
  21. /* Clear initial stack frame */
  22. s = (ulong *)gd->start_addr_sp;
  23. *s = 0; /* Terminate back chain */
  24. *++s = 0; /* NULL return address */
  25. return 0;
  26. }