spl_legacy.c 3.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2020 Stefan Roese <sr@denx.de>
  4. */
  5. #include <common.h>
  6. #include <malloc.h>
  7. #include <spl.h>
  8. #include <lzma/LzmaTypes.h>
  9. #include <lzma/LzmaDec.h>
  10. #include <lzma/LzmaTools.h>
  11. #define LZMA_LEN (1 << 20)
  12. int spl_parse_legacy_header(struct spl_image_info *spl_image,
  13. const struct image_header *header)
  14. {
  15. u32 header_size = sizeof(struct image_header);
  16. /* check uImage header CRC */
  17. if (IS_ENABLED(CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK) &&
  18. !image_check_hcrc(header)) {
  19. puts("SPL: Image header CRC check failed!\n");
  20. return -EINVAL;
  21. }
  22. if (spl_image->flags & SPL_COPY_PAYLOAD_ONLY) {
  23. /*
  24. * On some system (e.g. powerpc), the load-address and
  25. * entry-point is located at address 0. We can't load
  26. * to 0-0x40. So skip header in this case.
  27. */
  28. spl_image->load_addr = image_get_load(header);
  29. spl_image->entry_point = image_get_ep(header);
  30. spl_image->size = image_get_data_size(header);
  31. } else {
  32. spl_image->entry_point = image_get_ep(header);
  33. /* Load including the header */
  34. spl_image->load_addr = image_get_load(header) -
  35. header_size;
  36. spl_image->size = image_get_data_size(header) +
  37. header_size;
  38. }
  39. #ifdef CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK
  40. /* store uImage data length and CRC to check later */
  41. spl_image->dcrc_data = image_get_load(header);
  42. spl_image->dcrc_length = image_get_data_size(header);
  43. spl_image->dcrc = image_get_dcrc(header);
  44. #endif
  45. spl_image->os = image_get_os(header);
  46. spl_image->name = image_get_name(header);
  47. debug(SPL_TPL_PROMPT
  48. "payload image: %32s load addr: 0x%lx size: %d\n",
  49. spl_image->name, spl_image->load_addr, spl_image->size);
  50. return 0;
  51. }
  52. /*
  53. * This function is added explicitly to avoid code size increase, when
  54. * no compression method is enabled. The compiler will optimize the
  55. * following switch/case statement in spl_load_legacy_img() away due to
  56. * Dead Code Elimination.
  57. */
  58. static inline int spl_image_get_comp(const struct image_header *hdr)
  59. {
  60. if (IS_ENABLED(CONFIG_SPL_LZMA))
  61. return image_get_comp(hdr);
  62. return IH_COMP_NONE;
  63. }
  64. int spl_load_legacy_img(struct spl_image_info *spl_image,
  65. struct spl_load_info *load, ulong header)
  66. {
  67. __maybe_unused SizeT lzma_len;
  68. __maybe_unused void *src;
  69. struct image_header hdr;
  70. ulong dataptr;
  71. int ret;
  72. /* Read header into local struct */
  73. load->read(load, header, sizeof(hdr), &hdr);
  74. ret = spl_parse_image_header(spl_image, &hdr);
  75. if (ret)
  76. return ret;
  77. dataptr = header + sizeof(hdr);
  78. /* Read image */
  79. switch (spl_image_get_comp(&hdr)) {
  80. case IH_COMP_NONE:
  81. load->read(load, dataptr, spl_image->size,
  82. (void *)(unsigned long)spl_image->load_addr);
  83. break;
  84. case IH_COMP_LZMA:
  85. lzma_len = LZMA_LEN;
  86. debug("LZMA: Decompressing %08lx to %08lx\n",
  87. dataptr, spl_image->load_addr);
  88. src = malloc(spl_image->size);
  89. if (!src) {
  90. printf("Unable to allocate %d bytes for LZMA\n",
  91. spl_image->size);
  92. return -ENOMEM;
  93. }
  94. load->read(load, dataptr, spl_image->size, src);
  95. ret = lzmaBuffToBuffDecompress((void *)spl_image->load_addr,
  96. &lzma_len, src, spl_image->size);
  97. if (ret) {
  98. printf("LZMA decompression error: %d\n", ret);
  99. return ret;
  100. }
  101. spl_image->size = lzma_len;
  102. break;
  103. default:
  104. debug("Compression method %s is not supported\n",
  105. genimg_get_comp_short_name(image_get_comp(&hdr)));
  106. return -EINVAL;
  107. }
  108. return 0;
  109. }