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arch
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arm64
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kernel
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image.h

image.h 2.0 KB
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  1. /*
    2. 

  2.  * Linker script macros to generate Image header fields.
    3. 

  3.  *
    4. 

  4.  * Copyright (C) 2014 ARM Ltd.
    5. 

  5.  *
    6. 

  6.  * This program is free software; you can redistribute it and/or modify
    7. 

  7.  * it under the terms of the GNU General Public License version 2 as
    8. 

  8.  * published by the Free Software Foundation.
    9. 

  9.  *
    10. 

  10.  * This program is distributed in the hope that it will be useful,
    11. 

  11.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12. 

  12.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13. 

  13.  * GNU General Public License for more details.
    14. 

  14.  *
    15. 

  15.  * You should have received a copy of the GNU General Public License
    16. 

  16.  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17. 

  17.  */
    18. 

  18. #ifndef __ASM_IMAGE_H
    19. 

  19. #define __ASM_IMAGE_H
    20. 

  20. 

  21. #ifndef LINKER_SCRIPT
    22. 

  22. #error This file should only be included in vmlinux.lds.S
    23. 

  23. #endif
    24. 

  24. 

  25. /*
    26. 

  26.  * There aren't any ELF relocations we can use to endian-swap values known only
    27. 

  27.  * at link time (e.g. the subtraction of two symbol addresses), so we must get
    28. 

  28.  * the linker to endian-swap certain values before emitting them.
    29. 

  29.  */
    30. 

  30. #ifdef CONFIG_CPU_BIG_ENDIAN
    31. 

  31. #define DATA_LE64(data)					\
    32. 

  32. 	((((data) & 0x00000000000000ff) << 56) |	\
    33. 

  33. 	 (((data) & 0x000000000000ff00) << 40) |	\
    34. 

  34. 	 (((data) & 0x0000000000ff0000) << 24) |	\
    35. 

  35. 	 (((data) & 0x00000000ff000000) << 8)  |	\
    36. 

  36. 	 (((data) & 0x000000ff00000000) >> 8)  |	\
    37. 

  37. 	 (((data) & 0x0000ff0000000000) >> 24) |	\
    38. 

  38. 	 (((data) & 0x00ff000000000000) >> 40) |	\
    39. 

  39. 	 (((data) & 0xff00000000000000) >> 56))
    40. 

  40. #else
    41. 

  41. #define DATA_LE64(data) ((data) & 0xffffffffffffffff)
    42. 

  42. #endif
    43. 

  43. 

  44. #ifdef CONFIG_CPU_BIG_ENDIAN
    45. 

  45. #define __HEAD_FLAG_BE	1
    46. 

  46. #else
    47. 

  47. #define __HEAD_FLAG_BE	0
    48. 

  48. #endif
    49. 

  49. 

  50. #define __HEAD_FLAGS	(__HEAD_FLAG_BE << 0)
    51. 

  51. 

  52. /*
    53. 

  53.  * These will output as part of the Image header, which should be little-endian
    54. 

  54.  * regardless of the endianness of the kernel. While constant values could be
    55. 

  55.  * endian swapped in head.S, all are done here for consistency.
    56. 

  56.  */
    57. 

  57. #define HEAD_SYMBOLS						\
    58. 

  58. 	_kernel_size_le		= DATA_LE64(_end - _text);	\
    59. 

  59. 	_kernel_offset_le	= DATA_LE64(TEXT_OFFSET);	\
    60. 

  60. 	_kernel_flags_le	= DATA_LE64(__HEAD_FLAGS);
    61. 

  61. 

  62. #endif /* __ASM_IMAGE_H */
    63. 

  63.