bootm.c 2.0 KB

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  1. /*
  2. * (C) Copyright 2007 Michal Simek
  3. * (C) Copyright 2004 Atmark Techno, Inc.
  4. *
  5. * Michal SIMEK <monstr@monstr.eu>
  6. * Yasushi SHOJI <yashi@atmark-techno.com>
  7. *
  8. * SPDX-License-Identifier: GPL-2.0+
  9. */
  10. #include <common.h>
  11. #include <command.h>
  12. #include <fdt_support.h>
  13. #include <image.h>
  14. #include <u-boot/zlib.h>
  15. #include <asm/byteorder.h>
  16. int do_bootm_linux(int flag, int argc, char * const argv[],
  17. bootm_headers_t *images)
  18. {
  19. /* First parameter is mapped to $r5 for kernel boot args */
  20. void (*thekernel) (char *, ulong, ulong);
  21. char *commandline = env_get("bootargs");
  22. ulong rd_data_start, rd_data_end;
  23. /*
  24. * allow the PREP bootm subcommand, it is required for bootm to work
  25. */
  26. if (flag & BOOTM_STATE_OS_PREP)
  27. return 0;
  28. if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  29. return 1;
  30. int ret;
  31. char *of_flat_tree = NULL;
  32. #if defined(CONFIG_OF_LIBFDT)
  33. /* did generic code already find a device tree? */
  34. if (images->ft_len)
  35. of_flat_tree = images->ft_addr;
  36. #endif
  37. thekernel = (void (*)(char *, ulong, ulong))images->ep;
  38. /* find ramdisk */
  39. ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE,
  40. &rd_data_start, &rd_data_end);
  41. if (ret)
  42. return 1;
  43. bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  44. if (!of_flat_tree && argc > 1)
  45. of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
  46. /* fixup the initrd now that we know where it should be */
  47. if (images->rd_start && images->rd_end && of_flat_tree) {
  48. ret = fdt_initrd(of_flat_tree, images->rd_start,
  49. images->rd_end);
  50. if (ret)
  51. return 1;
  52. }
  53. #ifdef DEBUG
  54. printf("## Transferring control to Linux (at address 0x%08lx) ",
  55. (ulong)thekernel);
  56. printf("ramdisk 0x%08lx, FDT 0x%08lx...\n",
  57. rd_data_start, (ulong) of_flat_tree);
  58. #endif
  59. #ifdef XILINX_USE_DCACHE
  60. flush_cache(0, XILINX_DCACHE_BYTE_SIZE);
  61. #endif
  62. /*
  63. * Linux Kernel Parameters (passing device tree):
  64. * r5: pointer to command line
  65. * r6: pointer to ramdisk
  66. * r7: pointer to the fdt, followed by the board info data
  67. */
  68. thekernel(commandline, rd_data_start, (ulong)of_flat_tree);
  69. /* does not return */
  70. return 1;
  71. }