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  1. /* SPDX-License-Identifier: GPL-2.0+ */
  2. /*
  3. * ARM64 header for proper chain-loading with Little Kernel.
  4. *
  5. * Little Kernel shipped with Dragonboard820C boots standard Linux images for
  6. * ARM64. This file adds header that is required to boot U-Boot properly.
  7. *
  8. * For details see:
  9. * https://www.kernel.org/doc/Documentation/arm64/booting.txt
  10. *
  11. * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
  12. */
  13. #include <config.h>
  14. /*
  15. * per document in linux/Doc/arm64/booting.text
  16. */
  17. .global _arm64_header
  18. _arm64_header:
  19. b _start
  20. .word 0
  21. .quad CONFIG_SYS_TEXT_BASE-PHYS_SDRAM_1 /* Image load offset, LE */
  22. .quad 0 /* Effective size of kernel image, little-endian */
  23. .quad 0 /* kernel flags, little-endian */
  24. .quad 0 /* reserved */
  25. .quad 0 /* reserved */
  26. .quad 0 /* reserved */
  27. .byte 0x41 /* Magic number, "ARM\x64" */
  28. .byte 0x52
  29. .byte 0x4d
  30. .byte 0x64
  31. .word 0 /* reserved (used for PE COFF offset) */