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 <dm.h> 11 #include <spl.h> 12 #include <asm/u-boot.h> 13 #include <nand.h> 14 #include <fat.h> 15 #include <version.h> 16 #include <i2c.h> 17 #include <image.h> 18 #include <malloc.h> 19 #include <dm/root.h> 20 #include <linux/compiler.h> 21 22 DECLARE_GLOBAL_DATA_PTR; 23 24 #ifndef CONFIG_SYS_UBOOT_START 25 #define CONFIG_SYS_UBOOT_START CONFIG_SYS_TEXT_BASE 26 #endif 27 #ifndef CONFIG_SYS_MONITOR_LEN 28 /* Unknown U-Boot size, let's assume it will not be more than 200 KB */ 29 #define CONFIG_SYS_MONITOR_LEN (200 * 1024) 30 #endif 31 32 u32 *boot_params_ptr = NULL; 33 struct spl_image_info spl_image; 34 35 /* Define board data structure */ 36 static bd_t bdata __attribute__ ((section(".data"))); 37 38 /* 39 * Default function to determine if u-boot or the OS should 40 * be started. This implementation always returns 1. 41 * 42 * Please implement your own board specific funcion to do this. 43 * 44 * RETURN 45 * 0 to not start u-boot 46 * positive if u-boot should start 47 */ 48 #ifdef CONFIG_SPL_OS_BOOT 49 __weak int spl_start_uboot(void) 50 { 51 puts("SPL: Please implement spl_start_uboot() for your board\n"); 52 puts("SPL: Direct Linux boot not active!\n"); 53 return 1; 54 } 55 #endif 56 57 /* 58 * Weak default function for board specific cleanup/preparation before 59 * Linux boot. Some boards/platforms might not need it, so just provide 60 * an empty stub here. 61 */ 62 __weak void spl_board_prepare_for_linux(void) 63 { 64 /* Nothing to do! */ 65 } 66 67 void spl_set_header_raw_uboot(void) 68 { 69 spl_image.size = CONFIG_SYS_MONITOR_LEN; 70 spl_image.entry_point = CONFIG_SYS_UBOOT_START; 71 spl_image.load_addr = CONFIG_SYS_TEXT_BASE; 72 spl_image.os = IH_OS_U_BOOT; 73 spl_image.name = "U-Boot"; 74 } 75 76 void spl_parse_image_header(const struct image_header *header) 77 { 78 u32 header_size = sizeof(struct image_header); 79 80 if (image_get_magic(header) == IH_MAGIC) { 81 if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) { 82 /* 83 * On some system (e.g. powerpc), the load-address and 84 * entry-point is located at address 0. We can't load 85 * to 0-0x40. So skip header in this case. 86 */ 87 spl_image.load_addr = image_get_load(header); 88 spl_image.entry_point = image_get_ep(header); 89 spl_image.size = image_get_data_size(header); 90 } else { 91 spl_image.entry_point = image_get_load(header); 92 /* Load including the header */ 93 spl_image.load_addr = spl_image.entry_point - 94 header_size; 95 spl_image.size = image_get_data_size(header) + 96 header_size; 97 } 98 spl_image.os = image_get_os(header); 99 spl_image.name = image_get_name(header); 100 debug("spl: payload image: %.*s load addr: 0x%x size: %d\n", 101 (int)sizeof(spl_image.name), spl_image.name, 102 spl_image.load_addr, spl_image.size); 103 } else { 104 #ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE 105 /* 106 * CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the 107 * code which loads images in SPL cannot guarantee that 108 * absolutely all read errors will be reported. 109 * An example is the LPC32XX MLC NAND driver, which 110 * will consider that a completely unreadable NAND block 111 * is bad, and thus should be skipped silently. 112 */ 113 panic("** no mkimage signature but raw image not supported"); 114 #else 115 /* Signature not found - assume u-boot.bin */ 116 debug("mkimage signature not found - ih_magic = %x\n", 117 header->ih_magic); 118 spl_set_header_raw_uboot(); 119 #endif 120 } 121 } 122 123 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image) 124 { 125 typedef void __noreturn (*image_entry_noargs_t)(void); 126 127 image_entry_noargs_t image_entry = 128 (image_entry_noargs_t) spl_image->entry_point; 129 130 debug("image entry point: 0x%X\n", spl_image->entry_point); 131 image_entry(); 132 } 133 134 #ifdef CONFIG_SPL_RAM_DEVICE 135 static void spl_ram_load_image(void) 136 { 137 const struct image_header *header; 138 139 /* 140 * Get the header. It will point to an address defined by handoff 141 * which will tell where the image located inside the flash. For 142 * now, it will temporary fixed to address pointed by U-Boot. 143 */ 144 header = (struct image_header *) 145 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header)); 146 147 spl_parse_image_header(header); 148 } 149 #endif 150 151 void board_init_r(gd_t *dummy1, ulong dummy2) 152 { 153 u32 boot_device; 154 debug(">>spl:board_init_r()\n"); 155 156 #if defined(CONFIG_SYS_SPL_MALLOC_START) 157 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START, 158 CONFIG_SYS_SPL_MALLOC_SIZE); 159 gd->flags |= GD_FLG_FULL_MALLOC_INIT; 160 #elif defined(CONFIG_SYS_MALLOC_F_LEN) 161 gd->malloc_limit = gd->malloc_base + CONFIG_SYS_MALLOC_F_LEN; 162 gd->malloc_ptr = 0; 163 #endif 164 #ifdef CONFIG_SPL_DM 165 dm_init_and_scan(true); 166 #endif 167 168 #ifndef CONFIG_PPC 169 /* 170 * timer_init() does not exist on PPC systems. The timer is initialized 171 * and enabled (decrementer) in interrupt_init() here. 172 */ 173 timer_init(); 174 #endif 175 176 #ifdef CONFIG_SPL_BOARD_INIT 177 spl_board_init(); 178 #endif 179 180 boot_device = spl_boot_device(); 181 debug("boot device - %d\n", boot_device); 182 switch (boot_device) { 183 #ifdef CONFIG_SPL_RAM_DEVICE 184 case BOOT_DEVICE_RAM: 185 spl_ram_load_image(); 186 break; 187 #endif 188 #ifdef CONFIG_SPL_MMC_SUPPORT 189 case BOOT_DEVICE_MMC1: 190 case BOOT_DEVICE_MMC2: 191 case BOOT_DEVICE_MMC2_2: 192 spl_mmc_load_image(); 193 break; 194 #endif 195 #ifdef CONFIG_SPL_NAND_SUPPORT 196 case BOOT_DEVICE_NAND: 197 spl_nand_load_image(); 198 break; 199 #endif 200 #ifdef CONFIG_SPL_ONENAND_SUPPORT 201 case BOOT_DEVICE_ONENAND: 202 spl_onenand_load_image(); 203 break; 204 #endif 205 #ifdef CONFIG_SPL_NOR_SUPPORT 206 case BOOT_DEVICE_NOR: 207 spl_nor_load_image(); 208 break; 209 #endif 210 #ifdef CONFIG_SPL_YMODEM_SUPPORT 211 case BOOT_DEVICE_UART: 212 spl_ymodem_load_image(); 213 break; 214 #endif 215 #ifdef CONFIG_SPL_SPI_SUPPORT 216 case BOOT_DEVICE_SPI: 217 spl_spi_load_image(); 218 break; 219 #endif 220 #ifdef CONFIG_SPL_ETH_SUPPORT 221 case BOOT_DEVICE_CPGMAC: 222 #ifdef CONFIG_SPL_ETH_DEVICE 223 spl_net_load_image(CONFIG_SPL_ETH_DEVICE); 224 #else 225 spl_net_load_image(NULL); 226 #endif 227 break; 228 #endif 229 #ifdef CONFIG_SPL_USBETH_SUPPORT 230 case BOOT_DEVICE_USBETH: 231 spl_net_load_image("usb_ether"); 232 break; 233 #endif 234 #ifdef CONFIG_SPL_USB_SUPPORT 235 case BOOT_DEVICE_USB: 236 spl_usb_load_image(); 237 break; 238 #endif 239 #ifdef CONFIG_SPL_SATA_SUPPORT 240 case BOOT_DEVICE_SATA: 241 spl_sata_load_image(); 242 break; 243 #endif 244 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE 245 case BOOT_DEVICE_BOARD: 246 spl_board_load_image(); 247 break; 248 #endif 249 default: 250 #if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT) 251 puts("SPL: Unsupported Boot Device!\n"); 252 #endif 253 hang(); 254 } 255 256 switch (spl_image.os) { 257 case IH_OS_U_BOOT: 258 debug("Jumping to U-Boot\n"); 259 break; 260 #ifdef CONFIG_SPL_OS_BOOT 261 case IH_OS_LINUX: 262 debug("Jumping to Linux\n"); 263 spl_board_prepare_for_linux(); 264 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR); 265 #endif 266 default: 267 debug("Unsupported OS image.. Jumping nevertheless..\n"); 268 } 269 #if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE) 270 debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr, 271 gd->malloc_ptr / 1024); 272 #endif 273 274 jump_to_image_no_args(&spl_image); 275 } 276 277 /* 278 * This requires UART clocks to be enabled. In order for this to work the 279 * caller must ensure that the gd pointer is valid. 280 */ 281 void preloader_console_init(void) 282 { 283 gd->bd = &bdata; 284 gd->baudrate = CONFIG_BAUDRATE; 285 286 serial_init(); /* serial communications setup */ 287 288 gd->have_console = 1; 289 290 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \ 291 U_BOOT_TIME ")\n"); 292 #ifdef CONFIG_SPL_DISPLAY_PRINT 293 spl_display_print(); 294 #endif 295 } 296 297 /** 298 * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution 299 * 300 * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM 301 * for the main board_init_r() execution. This is typically because we need 302 * more stack space for things like the MMC sub-system. 303 * 304 * This function calculates the stack position, copies the global_data into 305 * place and returns the new stack position. The caller is responsible for 306 * setting up the sp register. 307 * 308 * @return new stack location, or 0 to use the same stack 309 */ 310 ulong spl_relocate_stack_gd(void) 311 { 312 #ifdef CONFIG_SPL_STACK_R 313 gd_t *new_gd; 314 ulong ptr; 315 316 /* Get stack position: use 8-byte alignment for ABI compliance */ 317 ptr = CONFIG_SPL_STACK_R - sizeof(gd_t); 318 ptr &= ~7; 319 new_gd = (gd_t *)ptr; 320 memcpy(new_gd, (void *)gd, sizeof(gd_t)); 321 gd = new_gd; 322 323 /* Clear the BSS. */ 324 memset(__bss_start, 0, __bss_end - __bss_start); 325 326 return ptr; 327 #else 328 return 0; 329 #endif 330 } 331