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