| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2011 |
| 3 | * Graeme Russ, <graeme.russ@gmail.com> |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | */ |
| 7 | #include <common.h> |
| 8 | #include <fdtdec.h> |
| 9 | #include <spi.h> |
| 10 | #include <asm/sections.h> |
| 11 | |
| 12 | DECLARE_GLOBAL_DATA_PTR; |
| 13 | |
| 14 | /* Get the top of usable RAM */ |
| 15 | __weak ulong board_get_usable_ram_top(ulong total_size) |
| 16 | { |
| 17 | return gd->ram_size; |
| 18 | } |
| 19 | |
| 20 | int calculate_relocation_address(void) |
| 21 | { |
| 22 | const ulong uboot_size = (uintptr_t)&__bss_end - |
| 23 | (uintptr_t)&__text_start; |
| 24 | ulong total_size; |
| 25 | ulong dest_addr; |
| 26 | ulong fdt_size = 0; |
| 27 | |
| 28 | #if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL) |
| 29 | if (gd->fdt_blob) |
| 30 | fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32); |
| 31 | #endif |
| 32 | total_size = ALIGN(uboot_size, 1 << 12) + CONFIG_SYS_MALLOC_LEN + |
| 33 | CONFIG_SYS_STACK_SIZE + fdt_size; |
| 34 | |
| 35 | dest_addr = board_get_usable_ram_top(total_size); |
| 36 | /* |
| 37 | * NOTE: All destination address are rounded down to 16-byte |
| 38 | * boundary to satisfy various worst-case alignment |
| 39 | * requirements |
| 40 | */ |
| 41 | dest_addr &= ~15; |
| 42 | |
| 43 | #if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL) |
| 44 | /* |
| 45 | * If the device tree is sitting immediate above our image then we |
| 46 | * must relocate it. If it is embedded in the data section, then it |
| 47 | * will be relocated with other data. |
| 48 | */ |
| 49 | if (gd->fdt_blob) { |
| 50 | dest_addr -= fdt_size; |
| 51 | gd->new_fdt = (void *)dest_addr; |
| 52 | dest_addr &= ~15; |
| 53 | } |
| 54 | #endif |
| 55 | /* U-Boot is below the FDT */ |
| 56 | dest_addr -= uboot_size; |
| 57 | dest_addr &= ~((1 << 12) - 1); |
| 58 | gd->relocaddr = dest_addr; |
| 59 | gd->reloc_off = dest_addr - (uintptr_t)&__text_start; |
| 60 | |
| 61 | /* Stack is at the bottom, so it can grow down */ |
| 62 | gd->start_addr_sp = dest_addr - CONFIG_SYS_MALLOC_LEN; |
| 63 | |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | int init_cache_f_r(void) |
| 68 | { |
| 69 | /* Initialise the CPU cache(s) */ |
| 70 | return init_cache(); |
| 71 | } |
| 72 | |
| 73 | bd_t bd_data; |
| 74 | |
| 75 | int init_bd_struct_r(void) |
| 76 | { |
| 77 | gd->bd = &bd_data; |
| 78 | memset(gd->bd, 0, sizeof(bd_t)); |
| 79 | |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | int init_func_spi(void) |
| 84 | { |
| 85 | puts("SPI: "); |
| 86 | spi_init(); |
| 87 | puts("ready\n"); |
| 88 | return 0; |
| 89 | } |
| 90 | |
| 91 | int find_fdt(void) |
| 92 | { |
| 93 | #ifdef CONFIG_OF_EMBED |
| 94 | /* Get a pointer to the FDT */ |
| 95 | gd->fdt_blob = _binary_dt_dtb_start; |
| 96 | #elif defined CONFIG_OF_SEPARATE |
| 97 | /* FDT is at end of image */ |
| 98 | gd->fdt_blob = (ulong *)&_end; |
| 99 | #endif |
| 100 | /* Allow the early environment to override the fdt address */ |
| 101 | gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, |
| 102 | (uintptr_t)gd->fdt_blob); |
| 103 | |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | int prepare_fdt(void) |
| 108 | { |
| 109 | /* For now, put this check after the console is ready */ |
| 110 | if (fdtdec_prepare_fdt()) { |
| 111 | panic("** CONFIG_OF_CONTROL defined but no FDT - please see " |
| 112 | "doc/README.fdt-control"); |
| 113 | } |
| 114 | |
| 115 | return 0; |
| 116 | } |