spl.c 2.3 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778
  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 <linux/compiler.h>
  17. #include <asm/mach-types.h>
  18. #ifndef CONFIG_SPL_DM
  19. /* Pointer to as well as the global data structure for SPL */
  20. DECLARE_GLOBAL_DATA_PTR;
  21. /*
  22. * WARNING: This is going away very soon. Don't use it and don't submit
  23. * pafches that rely on it. The global_data area is set up in crt0.S.
  24. */
  25. gd_t gdata __attribute__ ((section(".data")));
  26. #endif
  27. /*
  28. * In the context of SPL, board_init_f() prepares the hardware for execution
  29. * from system RAM (DRAM, DDR...). As system RAM may not be available yet,
  30. * board_init_f() must use the current GD to store any data which must be
  31. * passed on to later stages. These data include the relocation destination,
  32. * the future stack, and the future GD location. BSS is cleared after this
  33. * function (and therefore must be accessible).
  34. *
  35. * We provide this version by default but mark it as __weak to allow for
  36. * platforms to do this in their own way if needed. Please see the top
  37. * level U-Boot README "Board Initialization Flow" section for info on what
  38. * to put in this function.
  39. */
  40. void __weak board_init_f(ulong dummy)
  41. {
  42. }
  43. /*
  44. * This function jumps to an image with argument. Normally an FDT or ATAGS
  45. * image.
  46. */
  47. #ifdef CONFIG_SPL_OS_BOOT
  48. #ifdef CONFIG_ARM64
  49. void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
  50. {
  51. debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
  52. cleanup_before_linux();
  53. armv8_switch_to_el2((u64)spl_image->arg, 0, 0, 0,
  54. spl_image->entry_point, ES_TO_AARCH64);
  55. }
  56. #else
  57. void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
  58. {
  59. unsigned long machid = 0xffffffff;
  60. #ifdef CONFIG_MACH_TYPE
  61. machid = CONFIG_MACH_TYPE;
  62. #endif
  63. debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
  64. typedef void (*image_entry_arg_t)(int, int, void *)
  65. __attribute__ ((noreturn));
  66. image_entry_arg_t image_entry =
  67. (image_entry_arg_t)(uintptr_t) spl_image->entry_point;
  68. cleanup_before_linux();
  69. image_entry(0, machid, spl_image->arg);
  70. }
  71. #endif /* CONFIG_ARM64 */
  72. #endif