stack.c 1.1 KB

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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. #ifdef CONFIG_SPL_BUILD
  19. gd->start_addr_sp -= 128; /* leave 32 words for abort-stack */
  20. gd->irq_sp = gd->start_addr_sp;
  21. #else
  22. /* setup stack pointer for exceptions */
  23. gd->irq_sp = gd->start_addr_sp;
  24. # if !defined(CONFIG_ARM64)
  25. # ifdef CONFIG_USE_IRQ
  26. gd->start_addr_sp -= (CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ);
  27. debug("Reserving %zu Bytes for IRQ stack at: %08lx\n",
  28. CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ, gd->start_addr_sp);
  29. /* 8-byte alignment for ARM ABI compliance */
  30. gd->start_addr_sp &= ~0x07;
  31. # endif
  32. /* leave 3 words for abort-stack, plus 1 for alignment */
  33. gd->start_addr_sp -= 16;
  34. # endif
  35. #endif
  36. return 0;
  37. }