include/init.h

   1 /*
   2  * (C) Copyright 2000-2009
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Copy the startup prototype, previously defined in common.h
   6  * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #ifndef __INIT_H_
  12 #define __INIT_H_       1
  13
  14 #ifndef __ASSEMBLY__            /* put C only stuff in this section */
  15
  16 /*
  17  * Function Prototypes
  18  */
  19
  20 /* common/board_f.c */
  21 void board_init_f(ulong dummy);
  22
  23 /**
  24  * arch_cpu_init() - basic cpu-dependent setup for an architecture
  25  *
  26  * This is called after early malloc is available. It should handle any
  27  * CPU- or SoC- specific init needed to continue the init sequence. See
  28  * board_f.c for where it is called. If this is not provided, a default
  29  * version (which does nothing) will be used.
  30  *
  31  * @return: 0 on success, otherwise error
  32  */
  33 int arch_cpu_init(void);
  34
  35 /**
  36  * arch_cpu_init_dm() - init CPU after driver model is available
  37  *
  38  * This is called immediately after driver model is available before
  39  * relocation. This is similar to arch_cpu_init() but is able to reference
  40  * devices
  41  *
  42  * @return 0 if OK, -ve on error
  43  */
  44 int arch_cpu_init_dm(void);
  45
  46 /**
  47  * mach_cpu_init() - SoC/machine dependent CPU setup
  48  *
  49  * This is called after arch_cpu_init(). It should handle any
  50  * SoC or machine specific init needed to continue the init sequence. See
  51  * board_f.c for where it is called. If this is not provided, a default
  52  * version (which does nothing) will be used.
  53  *
  54  * @return: 0 on success, otherwise error
  55  */
  56 int mach_cpu_init(void);
  57
  58 /**
  59  * arch_fsp_init() - perform firmware support package init
  60  *
  61  * Where U-Boot relies on binary blobs to handle part of the system init, this
  62  * function can be used to set up the blobs. This is used on some Intel
  63  * platforms.
  64  */
  65 int arch_fsp_init(void);
  66
  67 int dram_init(void);
  68
  69 /**
  70  * dram_init_banksize() - Set up DRAM bank sizes
  71  *
  72  * This can be implemented by boards to set up the DRAM bank information in
  73  * gd->bd->bi_dram(). It is called just before relocation, after dram_init()
  74  * is called.
  75  *
  76  * If this is not provided, a default implementation will try to set up a
  77  * single bank. It will do this if CONFIG_NR_DRAM_BANKS and
  78  * CONFIG_SYS_SDRAM_BASE are set. The bank will have a start address of
  79  * CONFIG_SYS_SDRAM_BASE and the size will be determined by a call to
  80  * get_effective_memsize().
  81  *
  82  * @return 0 if OK, -ve on error
  83  */
  84 int dram_init_banksize(void);
  85
  86 /**
  87  * Reserve all necessary stacks
  88  *
  89  * This is used in generic board init sequence in common/board_f.c. Each
  90  * architecture could provide this function to tailor the required stacks.
  91  *
  92  * On entry gd->start_addr_sp is pointing to the suggested top of the stack.
  93  * The callee ensures gd->start_add_sp is 16-byte aligned, so architectures
  94  * require only this can leave it untouched.
  95  *
  96  * On exit gd->start_addr_sp and gd->irq_sp should be set to the respective
  97  * positions of the stack. The stack pointer(s) will be set to this later.
  98  * gd->irq_sp is only required, if the architecture needs it.
  99  *
 100  * @return 0 if no error
 101  */
 102 int arch_reserve_stacks(void);
 103
 104 /**
 105  * init_cache_f_r() - Turn on the cache in preparation for relocation
 106  *
 107  * @return 0 if OK, -ve on error
 108  */
 109 int init_cache_f_r(void);
 110
 111 int print_cpuinfo(void);
 112 int timer_init(void);
 113 int reserve_mmu(void);
 114 int misc_init_f(void);
 115 #if defined(CONFIG_DTB_RESELECT)
 116 int embedded_dtb_select(void);
 117 #endif
 118
 119 /* common/init/board_init.c */
 120 extern ulong monitor_flash_len;
 121
 122 /**
 123  * ulong board_init_f_alloc_reserve - allocate reserved area
 124  *
 125  * This function is called by each architecture very early in the start-up
 126  * code to allow the C runtime to reserve space on the stack for writable
 127  * 'globals' such as GD and the malloc arena.
 128  *
 129  * @top:        top of the reserve area, growing down.
 130  * @return:     bottom of reserved area
 131  */
 132 ulong board_init_f_alloc_reserve(ulong top);
 133
 134 /**
 135  * board_init_f_init_reserve - initialize the reserved area(s)
 136  *
 137  * This function is called once the C runtime has allocated the reserved
 138  * area on the stack. It must initialize the GD at the base of that area.
 139  *
 140  * @base:       top from which reservation was done
 141  */
 142 void board_init_f_init_reserve(ulong base);
 143
 144 /**
 145  * arch_setup_gd() - Set up the global_data pointer
 146  *
 147  * This pointer is special in some architectures and cannot easily be assigned
 148  * to. For example on x86 it is implemented by adding a specific record to its
 149  * Global Descriptor Table! So we we provide a function to carry out this task.
 150  * For most architectures this can simply be:
 151  *
 152  *    gd = gd_ptr;
 153  *
 154  * @gd_ptr:     Pointer to global data
 155  */
 156 void arch_setup_gd(gd_t *gd_ptr);
 157
 158 /* common/board_r.c */
 159 void board_init_r(gd_t *id, ulong dest_addr) __attribute__ ((noreturn));
 160
 161 int cpu_init_r(void);
 162 int last_stage_init(void);
 163 int mac_read_from_eeprom(void);
 164 int set_cpu_clk_info(void);
 165 int update_flash_size(int flash_size);
 166 int arch_early_init_r(void);
 167 void pci_init(void);
 168 int misc_init_r(void);
 169 #if defined(CONFIG_VID)
 170 int init_func_vid(void);
 171 #endif
 172
 173 /* common/board_info.c */
 174 int checkboard(void);
 175 int show_board_info(void);
 176
 177 #endif  /* __ASSEMBLY__ */
 178 /* Put only stuff here that the assembler can digest */
 179
 180 #endif  /* __INIT_H_ */