binman.c 2.5 KB

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  1. // SPDX-License-Identifier: Intel
  2. /*
  3. * Access to binman information at runtime
  4. *
  5. * Copyright 2019 Google LLC
  6. * Written by Simon Glass <sjg@chromium.org>
  7. */
  8. #include <common.h>
  9. #include <binman.h>
  10. #include <dm.h>
  11. #include <log.h>
  12. #include <malloc.h>
  13. #include <mapmem.h>
  14. /**
  15. * struct binman_info - Information needed by the binman library
  16. *
  17. * @image: Node describing the image we are running from
  18. * @rom_offset: Offset from an image_pos to the memory-mapped address, or
  19. * ROM_OFFSET_NONE if the ROM is not memory-mapped. Can be positive or
  20. * negative
  21. */
  22. struct binman_info {
  23. ofnode image;
  24. int rom_offset;
  25. };
  26. #define ROM_OFFSET_NONE (-1)
  27. static struct binman_info *binman;
  28. static int binman_entry_find_internal(ofnode node, const char *name,
  29. struct binman_entry *entry)
  30. {
  31. int ret;
  32. if (!ofnode_valid(node))
  33. node = binman->image;
  34. node = ofnode_find_subnode(node, name);
  35. if (!ofnode_valid(node))
  36. return log_msg_ret("node", -ENOENT);
  37. ret = ofnode_read_u32(node, "image-pos", &entry->image_pos);
  38. if (ret)
  39. return log_msg_ret("image-pos", ret);
  40. ret = ofnode_read_u32(node, "size", &entry->size);
  41. if (ret)
  42. return log_msg_ret("size", ret);
  43. return 0;
  44. }
  45. int binman_entry_find(const char *name, struct binman_entry *entry)
  46. {
  47. return binman_entry_find_internal(binman->image, name, entry);
  48. }
  49. int binman_entry_map(ofnode parent, const char *name, void **bufp, int *sizep)
  50. {
  51. struct binman_entry entry;
  52. int ret;
  53. if (binman->rom_offset == ROM_OFFSET_NONE)
  54. return -EPERM;
  55. ret = binman_entry_find_internal(parent, name, &entry);
  56. if (ret)
  57. return log_msg_ret("entry", ret);
  58. if (sizep)
  59. *sizep = entry.size;
  60. *bufp = map_sysmem(entry.image_pos + binman->rom_offset, entry.size);
  61. return 0;
  62. }
  63. ofnode binman_section_find_node(const char *name)
  64. {
  65. return ofnode_find_subnode(binman->image, name);
  66. }
  67. void binman_set_rom_offset(int rom_offset)
  68. {
  69. binman->rom_offset = rom_offset;
  70. }
  71. int binman_get_rom_offset(void)
  72. {
  73. return binman->rom_offset;
  74. }
  75. int binman_init(void)
  76. {
  77. binman = malloc(sizeof(struct binman_info));
  78. if (!binman)
  79. return log_msg_ret("space for binman", -ENOMEM);
  80. binman->image = ofnode_path("/binman");
  81. if (!ofnode_valid(binman->image))
  82. return log_msg_ret("binman node", -EINVAL);
  83. if (ofnode_read_bool(binman->image, "multiple-images")) {
  84. ofnode node = ofnode_first_subnode(binman->image);
  85. if (!ofnode_valid(node))
  86. return log_msg_ret("first image", -ENOENT);
  87. binman->image = node;
  88. }
  89. binman_set_rom_offset(ROM_OFFSET_NONE);
  90. return 0;
  91. }