spl.c 2.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2010-2012
  4. * Texas Instruments, <www.ti.com>
  5. *
  6. * Aneesh V <aneesh@ti.com>
  7. * Tom Rini <trini@ti.com>
  8. */
  9. #include <common.h>
  10. #include <config.h>
  11. #include <init.h>
  12. #include <log.h>
  13. #include <spl.h>
  14. #include <image.h>
  15. #include <asm/cache.h>
  16. #include <asm/global_data.h>
  17. #include <linux/compiler.h>
  18. #include <asm/mach-types.h>
  19. #ifndef CONFIG_SPL_DM
  20. /* Pointer to as well as the global data structure for SPL */
  21. DECLARE_GLOBAL_DATA_PTR;
  22. /*
  23. * WARNING: This is going away very soon. Don't use it and don't submit
  24. * pafches that rely on it. The global_data area is set up in crt0.S.
  25. */
  26. gd_t gdata __attribute__ ((section(".data")));
  27. #endif
  28. /*
  29. * In the context of SPL, board_init_f() prepares the hardware for execution
  30. * from system RAM (DRAM, DDR...). As system RAM may not be available yet,
  31. * board_init_f() must use the current GD to store any data which must be
  32. * passed on to later stages. These data include the relocation destination,
  33. * the future stack, and the future GD location. BSS is cleared after this
  34. * function (and therefore must be accessible).
  35. *
  36. * We provide this version by default but mark it as __weak to allow for
  37. * platforms to do this in their own way if needed. Please see the top
  38. * level U-Boot README "Board Initialization Flow" section for info on what
  39. * to put in this function.
  40. */
  41. void __weak board_init_f(ulong dummy)
  42. {
  43. }
  44. /*
  45. * This function jumps to an image with argument. Normally an FDT or ATAGS
  46. * image.
  47. */
  48. #ifdef CONFIG_SPL_OS_BOOT
  49. #ifdef CONFIG_ARM64
  50. void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
  51. {
  52. debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
  53. cleanup_before_linux();
  54. armv8_switch_to_el2((u64)spl_image->arg, 0, 0, 0,
  55. spl_image->entry_point, ES_TO_AARCH64);
  56. }
  57. #else
  58. void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
  59. {
  60. unsigned long machid = 0xffffffff;
  61. #ifdef CONFIG_MACH_TYPE
  62. machid = CONFIG_MACH_TYPE;
  63. #endif
  64. debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
  65. typedef void (*image_entry_arg_t)(int, int, void *)
  66. __attribute__ ((noreturn));
  67. image_entry_arg_t image_entry =
  68. (image_entry_arg_t)(uintptr_t) spl_image->entry_point;
  69. cleanup_before_linux();
  70. image_entry(0, machid, spl_image->arg);
  71. }
  72. #endif /* CONFIG_ARM64 */
  73. #endif