init.h 5.1 KB

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  1. /* SPDX-License-Identifier: GPL-2.0+ */
  2. /*
  3. * (C) Copyright 2000-2009
  4. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  5. *
  6. * Copy the startup prototype, previously defined in common.h
  7. * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
  8. */
  9. #ifndef __INIT_H_
  10. #define __INIT_H_ 1
  11. #ifndef __ASSEMBLY__ /* put C only stuff in this section */
  12. /*
  13. * Function Prototypes
  14. */
  15. /* common/board_f.c */
  16. void board_init_f(ulong dummy);
  17. /**
  18. * arch_cpu_init() - basic cpu-dependent setup for an architecture
  19. *
  20. * This is called after early malloc is available. It should handle any
  21. * CPU- or SoC- specific init needed to continue the init sequence. See
  22. * board_f.c for where it is called. If this is not provided, a default
  23. * version (which does nothing) will be used.
  24. *
  25. * @return: 0 on success, otherwise error
  26. */
  27. int arch_cpu_init(void);
  28. /**
  29. * arch_cpu_init_dm() - init CPU after driver model is available
  30. *
  31. * This is called immediately after driver model is available before
  32. * relocation. This is similar to arch_cpu_init() but is able to reference
  33. * devices
  34. *
  35. * @return 0 if OK, -ve on error
  36. */
  37. int arch_cpu_init_dm(void);
  38. /**
  39. * mach_cpu_init() - SoC/machine dependent CPU setup
  40. *
  41. * This is called after arch_cpu_init(). It should handle any
  42. * SoC or machine specific init needed to continue the init sequence. See
  43. * board_f.c for where it is called. If this is not provided, a default
  44. * version (which does nothing) will be used.
  45. *
  46. * @return: 0 on success, otherwise error
  47. */
  48. int mach_cpu_init(void);
  49. /**
  50. * arch_fsp_init() - perform firmware support package init
  51. *
  52. * Where U-Boot relies on binary blobs to handle part of the system init, this
  53. * function can be used to set up the blobs. This is used on some Intel
  54. * platforms.
  55. */
  56. int arch_fsp_init(void);
  57. int dram_init(void);
  58. /**
  59. * dram_init_banksize() - Set up DRAM bank sizes
  60. *
  61. * This can be implemented by boards to set up the DRAM bank information in
  62. * gd->bd->bi_dram(). It is called just before relocation, after dram_init()
  63. * is called.
  64. *
  65. * If this is not provided, a default implementation will try to set up a
  66. * single bank. It will do this if CONFIG_NR_DRAM_BANKS and
  67. * CONFIG_SYS_SDRAM_BASE are set. The bank will have a start address of
  68. * CONFIG_SYS_SDRAM_BASE and the size will be determined by a call to
  69. * get_effective_memsize().
  70. *
  71. * @return 0 if OK, -ve on error
  72. */
  73. int dram_init_banksize(void);
  74. /**
  75. * Reserve all necessary stacks
  76. *
  77. * This is used in generic board init sequence in common/board_f.c. Each
  78. * architecture could provide this function to tailor the required stacks.
  79. *
  80. * On entry gd->start_addr_sp is pointing to the suggested top of the stack.
  81. * The callee ensures gd->start_add_sp is 16-byte aligned, so architectures
  82. * require only this can leave it untouched.
  83. *
  84. * On exit gd->start_addr_sp and gd->irq_sp should be set to the respective
  85. * positions of the stack. The stack pointer(s) will be set to this later.
  86. * gd->irq_sp is only required, if the architecture needs it.
  87. *
  88. * @return 0 if no error
  89. */
  90. int arch_reserve_stacks(void);
  91. /**
  92. * init_cache_f_r() - Turn on the cache in preparation for relocation
  93. *
  94. * @return 0 if OK, -ve on error
  95. */
  96. int init_cache_f_r(void);
  97. int print_cpuinfo(void);
  98. int timer_init(void);
  99. int reserve_mmu(void);
  100. int misc_init_f(void);
  101. #if defined(CONFIG_DTB_RESELECT)
  102. int embedded_dtb_select(void);
  103. #endif
  104. /* common/init/board_init.c */
  105. extern ulong monitor_flash_len;
  106. /**
  107. * ulong board_init_f_alloc_reserve - allocate reserved area
  108. *
  109. * This function is called by each architecture very early in the start-up
  110. * code to allow the C runtime to reserve space on the stack for writable
  111. * 'globals' such as GD and the malloc arena.
  112. *
  113. * @top: top of the reserve area, growing down.
  114. * @return: bottom of reserved area
  115. */
  116. ulong board_init_f_alloc_reserve(ulong top);
  117. /**
  118. * board_init_f_init_reserve - initialize the reserved area(s)
  119. *
  120. * This function is called once the C runtime has allocated the reserved
  121. * area on the stack. It must initialize the GD at the base of that area.
  122. *
  123. * @base: top from which reservation was done
  124. */
  125. void board_init_f_init_reserve(ulong base);
  126. /**
  127. * arch_setup_gd() - Set up the global_data pointer
  128. *
  129. * This pointer is special in some architectures and cannot easily be assigned
  130. * to. For example on x86 it is implemented by adding a specific record to its
  131. * Global Descriptor Table! So we we provide a function to carry out this task.
  132. * For most architectures this can simply be:
  133. *
  134. * gd = gd_ptr;
  135. *
  136. * @gd_ptr: Pointer to global data
  137. */
  138. void arch_setup_gd(gd_t *gd_ptr);
  139. /* common/board_r.c */
  140. void board_init_r(gd_t *id, ulong dest_addr) __attribute__ ((noreturn));
  141. int cpu_init_r(void);
  142. int last_stage_init(void);
  143. int mac_read_from_eeprom(void);
  144. int set_cpu_clk_info(void);
  145. int update_flash_size(int flash_size);
  146. int arch_early_init_r(void);
  147. void pci_init(void);
  148. int misc_init_r(void);
  149. #if defined(CONFIG_VID)
  150. int init_func_vid(void);
  151. #endif
  152. /* common/board_info.c */
  153. int checkboard(void);
  154. int show_board_info(void);
  155. #endif /* __ASSEMBLY__ */
  156. /* Put only stuff here that the assembler can digest */
  157. #endif /* __INIT_H_ */