1 /* 2 * (C) Copyright 2010 3 * Texas Instruments, <www.ti.com> 4 * 5 * Aneesh V <aneesh@ti.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 #include <common.h> 10 #include <spl.h> 11 #include <asm/u-boot.h> 12 #include <nand.h> 13 #include <fat.h> 14 #include <version.h> 15 #include <i2c.h> 16 #include <image.h> 17 #include <malloc.h> 18 #include <linux/compiler.h> 19 20 DECLARE_GLOBAL_DATA_PTR; 21 22 #ifndef CONFIG_SYS_UBOOT_START 23 #define CONFIG_SYS_UBOOT_START CONFIG_SYS_TEXT_BASE 24 #endif 25 #ifndef CONFIG_SYS_MONITOR_LEN 26 #define CONFIG_SYS_MONITOR_LEN (200 * 1024) 27 #endif 28 29 u32 *boot_params_ptr = NULL; 30 struct spl_image_info spl_image; 31 32 /* Define board data structure */ 33 static bd_t bdata __attribute__ ((section(".data"))); 34 35 /* 36 * Default function to determine if u-boot or the OS should 37 * be started. This implementation always returns 1. 38 * 39 * Please implement your own board specific funcion to do this. 40 * 41 * RETURN 42 * 0 to not start u-boot 43 * positive if u-boot should start 44 */ 45 #ifdef CONFIG_SPL_OS_BOOT 46 __weak int spl_start_uboot(void) 47 { 48 puts("SPL: Please implement spl_start_uboot() for your board\n"); 49 puts("SPL: Direct Linux boot not active!\n"); 50 return 1; 51 } 52 #endif 53 54 /* 55 * Weak default function for board specific cleanup/preparation before 56 * Linux boot. Some boards/platforms might not need it, so just provide 57 * an empty stub here. 58 */ 59 __weak void spl_board_prepare_for_linux(void) 60 { 61 /* Nothing to do! */ 62 } 63 64 void spl_parse_image_header(const struct image_header *header) 65 { 66 u32 header_size = sizeof(struct image_header); 67 68 if (image_get_magic(header) == IH_MAGIC) { 69 if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) { 70 /* 71 * On some system (e.g. powerpc), the load-address and 72 * entry-point is located at address 0. We can't load 73 * to 0-0x40. So skip header in this case. 74 */ 75 spl_image.load_addr = image_get_load(header); 76 spl_image.entry_point = image_get_ep(header); 77 spl_image.size = image_get_data_size(header); 78 } else { 79 spl_image.entry_point = image_get_load(header); 80 /* Load including the header */ 81 spl_image.load_addr = spl_image.entry_point - 82 header_size; 83 spl_image.size = image_get_data_size(header) + 84 header_size; 85 } 86 spl_image.os = image_get_os(header); 87 spl_image.name = image_get_name(header); 88 debug("spl: payload image: %s load addr: 0x%x size: %d\n", 89 spl_image.name, spl_image.load_addr, spl_image.size); 90 } else { 91 /* Signature not found - assume u-boot.bin */ 92 debug("mkimage signature not found - ih_magic = %x\n", 93 header->ih_magic); 94 /* Let's assume U-Boot will not be more than 200 KB */ 95 spl_image.size = CONFIG_SYS_MONITOR_LEN; 96 spl_image.entry_point = CONFIG_SYS_UBOOT_START; 97 spl_image.load_addr = CONFIG_SYS_TEXT_BASE; 98 spl_image.os = IH_OS_U_BOOT; 99 spl_image.name = "U-Boot"; 100 } 101 } 102 103 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image) 104 { 105 typedef void __noreturn (*image_entry_noargs_t)(void); 106 107 image_entry_noargs_t image_entry = 108 (image_entry_noargs_t) spl_image->entry_point; 109 110 debug("image entry point: 0x%X\n", spl_image->entry_point); 111 image_entry(); 112 } 113 114 #ifdef CONFIG_SPL_RAM_DEVICE 115 static void spl_ram_load_image(void) 116 { 117 const struct image_header *header; 118 119 /* 120 * Get the header. It will point to an address defined by handoff 121 * which will tell where the image located inside the flash. For 122 * now, it will temporary fixed to address pointed by U-Boot. 123 */ 124 header = (struct image_header *) 125 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header)); 126 127 spl_parse_image_header(header); 128 } 129 #endif 130 131 void board_init_r(gd_t *dummy1, ulong dummy2) 132 { 133 u32 boot_device; 134 debug(">>spl:board_init_r()\n"); 135 136 #ifdef CONFIG_SYS_SPL_MALLOC_START 137 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START, 138 CONFIG_SYS_SPL_MALLOC_SIZE); 139 #endif 140 141 #ifndef CONFIG_PPC 142 /* 143 * timer_init() does not exist on PPC systems. The timer is initialized 144 * and enabled (decrementer) in interrupt_init() here. 145 */ 146 timer_init(); 147 #endif 148 149 #ifdef CONFIG_SPL_BOARD_INIT 150 spl_board_init(); 151 #endif 152 153 boot_device = spl_boot_device(); 154 debug("boot device - %d\n", boot_device); 155 switch (boot_device) { 156 #ifdef CONFIG_SPL_RAM_DEVICE 157 case BOOT_DEVICE_RAM: 158 spl_ram_load_image(); 159 break; 160 #endif 161 #ifdef CONFIG_SPL_MMC_SUPPORT 162 case BOOT_DEVICE_MMC1: 163 case BOOT_DEVICE_MMC2: 164 case BOOT_DEVICE_MMC2_2: 165 spl_mmc_load_image(); 166 break; 167 #endif 168 #ifdef CONFIG_SPL_NAND_SUPPORT 169 case BOOT_DEVICE_NAND: 170 spl_nand_load_image(); 171 break; 172 #endif 173 #ifdef CONFIG_SPL_ONENAND_SUPPORT 174 case BOOT_DEVICE_ONENAND: 175 spl_onenand_load_image(); 176 break; 177 #endif 178 #ifdef CONFIG_SPL_NOR_SUPPORT 179 case BOOT_DEVICE_NOR: 180 spl_nor_load_image(); 181 break; 182 #endif 183 #ifdef CONFIG_SPL_YMODEM_SUPPORT 184 case BOOT_DEVICE_UART: 185 spl_ymodem_load_image(); 186 break; 187 #endif 188 #ifdef CONFIG_SPL_SPI_SUPPORT 189 case BOOT_DEVICE_SPI: 190 spl_spi_load_image(); 191 break; 192 #endif 193 #ifdef CONFIG_SPL_ETH_SUPPORT 194 case BOOT_DEVICE_CPGMAC: 195 #ifdef CONFIG_SPL_ETH_DEVICE 196 spl_net_load_image(CONFIG_SPL_ETH_DEVICE); 197 #else 198 spl_net_load_image(NULL); 199 #endif 200 break; 201 #endif 202 #ifdef CONFIG_SPL_USBETH_SUPPORT 203 case BOOT_DEVICE_USBETH: 204 spl_net_load_image("usb_ether"); 205 break; 206 #endif 207 default: 208 debug("SPL: Un-supported Boot Device\n"); 209 hang(); 210 } 211 212 switch (spl_image.os) { 213 case IH_OS_U_BOOT: 214 debug("Jumping to U-Boot\n"); 215 break; 216 #ifdef CONFIG_SPL_OS_BOOT 217 case IH_OS_LINUX: 218 debug("Jumping to Linux\n"); 219 spl_board_prepare_for_linux(); 220 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR); 221 #endif 222 default: 223 debug("Unsupported OS image.. Jumping nevertheless..\n"); 224 } 225 jump_to_image_no_args(&spl_image); 226 } 227 228 /* 229 * This requires UART clocks to be enabled. In order for this to work the 230 * caller must ensure that the gd pointer is valid. 231 */ 232 void preloader_console_init(void) 233 { 234 gd->bd = &bdata; 235 gd->baudrate = CONFIG_BAUDRATE; 236 237 serial_init(); /* serial communications setup */ 238 239 gd->have_console = 1; 240 241 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \ 242 U_BOOT_TIME ")\n"); 243 #ifdef CONFIG_SPL_DISPLAY_PRINT 244 spl_display_print(); 245 #endif 246 } 247