include/init.h

   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
  10 #ifndef __INIT_H_
  11 #define __INIT_H_       1
  12
  13 #include <linux/types.h>
  14
  15 struct global_data;
  16
  17 #ifndef __ASSEMBLY__            /* put C only stuff in this section */
  18
  19 /* Avoid using CONFIG_EFI_STUB directly as we may boot from other loaders */
  20 #ifdef CONFIG_EFI_STUB
  21 #define ll_boot_init()  false
  22 #else
  23 #define ll_boot_init()  (!(gd->flags & GD_FLG_SKIP_LL_INIT))
  24 #endif
  25
  26 /*
  27  * Function Prototypes
  28  */
  29
  30 /* common/board_f.c */
  31 void board_init_f(ulong dummy);
  32
  33 /**
  34  * arch_cpu_init() - basic cpu-dependent setup for an architecture
  35  *
  36  * This is called after early malloc is available. It should handle any
  37  * CPU- or SoC- specific init needed to continue the init sequence. See
  38  * board_f.c for where it is called. If this is not provided, a default
  39  * version (which does nothing) will be used.
  40  *
  41  * Return: 0 on success, otherwise error
  42  */
  43 int arch_cpu_init(void);
  44
  45 /**
  46  * arch_cpu_init_dm() - init CPU after driver model is available
  47  *
  48  * This is called immediately after driver model is available before
  49  * relocation. This is similar to arch_cpu_init() but is able to reference
  50  * devices
  51  *
  52  * Return: 0 if OK, -ve on error
  53  */
  54 int arch_cpu_init_dm(void);
  55
  56 /**
  57  * mach_cpu_init() - SoC/machine dependent CPU setup
  58  *
  59  * This is called after arch_cpu_init(). It should handle any
  60  * SoC or machine specific init needed to continue the init sequence. See
  61  * board_f.c for where it is called. If this is not provided, a default
  62  * version (which does nothing) will be used.
  63  *
  64  * Return: 0 on success, otherwise error
  65  */
  66 int mach_cpu_init(void);
  67
  68 /**
  69  * arch_fsp_init() - perform firmware support package init
  70  *
  71  * Where U-Boot relies on binary blobs to handle part of the system init, this
  72  * function can be used to set up the blobs. This is used on some Intel
  73  * platforms.
  74  *
  75  * Return: 0
  76  */
  77 int arch_fsp_init(void);
  78
  79 /**
  80  * arch_fsp_init() - perform post-relocation firmware support package init
  81  *
  82  * Where U-Boot relies on binary blobs to handle part of the system init, this
  83  * function can be used to set up the blobs. This is used on some Intel
  84  * platforms.
  85  *
  86  * Return: 0
  87  */
  88 int arch_fsp_init_r(void);
  89
  90 int dram_init(void);
  91
  92 /**
  93  * dram_init_banksize() - Set up DRAM bank sizes
  94  *
  95  * This can be implemented by boards to set up the DRAM bank information in
  96  * gd->bd->bi_dram(). It is called just before relocation, after dram_init()
  97  * is called.
  98  *
  99  * If this is not provided, a default implementation will try to set up a
 100  * single bank. It will do this if CONFIG_NR_DRAM_BANKS and
 101  * CONFIG_SYS_SDRAM_BASE are set. The bank will have a start address of
 102  * CONFIG_SYS_SDRAM_BASE and the size will be determined by a call to
 103  * get_effective_memsize().
 104  *
 105  * Return: 0 if OK, -ve on error
 106  */
 107 int dram_init_banksize(void);
 108
 109 long get_ram_size(long *base, long size);
 110 phys_size_t get_effective_memsize(void);
 111
 112 int testdram(void);
 113
 114 /**
 115  * arch_reserve_stacks() - Reserve all necessary stacks
 116  *
 117  * This is used in generic board init sequence in common/board_f.c. Each
 118  * architecture could provide this function to tailor the required stacks.
 119  *
 120  * On entry gd->start_addr_sp is pointing to the suggested top of the stack.
 121  * The callee ensures gd->start_add_sp is 16-byte aligned, so architectures
 122  * require only this can leave it untouched.
 123  *
 124  * On exit gd->start_addr_sp and gd->irq_sp should be set to the respective
 125  * positions of the stack. The stack pointer(s) will be set to this later.
 126  * gd->irq_sp is only required, if the architecture needs it.
 127  *
 128  * Return: 0 if no error
 129  */
 130 int arch_reserve_stacks(void);
 131
 132 /**
 133  * arch_reserve_mmu() - Reserve memory for MMU TLB table
 134  *
 135  * Architecture-specific routine for reserving memory for the MMU TLB table.
 136  * This is used in generic board init sequence in common/board_f.c.
 137  *
 138  * If an implementation is not provided, it will just be a nop stub.
 139  *
 140  * Return: 0 if OK
 141  */
 142 int arch_reserve_mmu(void);
 143
 144 /**
 145  * init_cache_f_r() - Turn on the cache in preparation for relocation
 146  *
 147  * Return: 0 if OK, -ve on error
 148  */
 149 int init_cache_f_r(void);
 150
 151 #if !CONFIG_IS_ENABLED(CPU)
 152 /**
 153  * print_cpuinfo() - Display information about the CPU
 154  *
 155  * Return: 0 if OK, -ve on error
 156  */
 157 int print_cpuinfo(void);
 158 #endif
 159 int timer_init(void);
 160 int misc_init_f(void);
 161
 162 #if defined(CONFIG_DTB_RESELECT)
 163 int embedded_dtb_select(void);
 164 #endif
 165
 166 /* common/init/board_init.c */
 167 extern ulong monitor_flash_len;
 168
 169 /**
 170  * ulong board_init_f_alloc_reserve - allocate reserved area
 171  * @top: top of the reserve area, growing down.
 172  *
 173  * This function is called by each architecture very early in the start-up
 174  * code to allow the C runtime to reserve space on the stack for writable
 175  * 'globals' such as GD and the malloc arena.
 176  *
 177  * Return: bottom of reserved area
 178  */
 179 ulong board_init_f_alloc_reserve(ulong top);
 180
 181 /**
 182  * board_init_f_init_reserve - initialize the reserved area(s)
 183  * @base:       top from which reservation was done
 184  *
 185  * This function is called once the C runtime has allocated the reserved
 186  * area on the stack. It must initialize the GD at the base of that area.
 187  */
 188 void board_init_f_init_reserve(ulong base);
 189
 190 struct global_data;
 191
 192 /**
 193  * arch_setup_gd() - Set up the global_data pointer
 194  * @gd_ptr: Pointer to global data
 195  *
 196  * This pointer is special in some architectures and cannot easily be assigned
 197  * to. For example on x86 it is implemented by adding a specific record to its
 198  * Global Descriptor Table! So we we provide a function to carry out this task.
 199  * For most architectures this can simply be:
 200  *
 201  *    gd = gd_ptr;
 202  */
 203 void arch_setup_gd(struct global_data *gd_ptr);
 204
 205 /* common/board_r.c */
 206 void board_init_r(struct global_data *id, ulong dest_addr)
 207         __attribute__ ((noreturn));
 208
 209 int cpu_init_r(void);
 210 int last_stage_init(void);
 211 int mac_read_from_eeprom(void);
 212 int set_cpu_clk_info(void);
 213 int update_flash_size(int flash_size);
 214 int arch_early_init_r(void);
 215 void pci_init(void);
 216 int misc_init_r(void);
 217 #if defined(CONFIG_VID)
 218 int init_func_vid(void);
 219 #endif
 220
 221 /* common/board_info.c */
 222 int checkboard(void);
 223 int show_board_info(void);
 224
 225 /**
 226  * Get the uppermost pointer that is valid to access
 227  *
 228  * Some systems may not map all of their address space. This function allows
 229  * boards to indicate what their highest support pointer value is for DRAM
 230  * access.
 231  *
 232  * @param total_size    Size of U-Boot (unused?)
 233  */
 234 ulong board_get_usable_ram_top(ulong total_size);
 235
 236 int board_early_init_f(void);
 237
 238 /* manipulate the U-Boot fdt before its relocation */
 239 int board_fix_fdt(void *rw_fdt_blob);
 240 int board_late_init(void);
 241 int board_postclk_init(void); /* after clocks/timebase, before env/serial */
 242 int board_early_init_r(void);
 243
 244 /* TODO(sjg@chromium.org): Drop this when DM_PCI migration is completed */
 245 void pci_init_board(void);
 246
 247 void trap_init(unsigned long reloc_addr);
 248
 249 /**
 250  * main_loop() - Enter the main loop of U-Boot
 251  *
 252  * This normally runs the command line.
 253  */
 254 void main_loop(void);
 255
 256 #if defined(CONFIG_ARM)
 257 void relocate_code(ulong addr_moni);
 258 #else
 259 void relocate_code(ulong start_addr_sp, struct global_data *new_gd,
 260                    ulong relocaddr)
 261         __attribute__ ((noreturn));
 262 #endif
 263
 264 #endif  /* __ASSEMBLY__ */
 265 /* Put only stuff here that the assembler can digest */
 266
 267 #endif  /* __INIT_H_ */