common/spl/spl.c

   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)(unsigned long)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 int spl_init(void)
 152 {
 153         int ret;
 154
 155         debug("spl_init()\n");
 156 #if defined(CONFIG_SYS_MALLOC_F_LEN)
 157         gd->malloc_limit = CONFIG_SYS_MALLOC_F_LEN;
 158         gd->malloc_ptr = 0;
 159 #endif
 160         if (IS_ENABLED(CONFIG_OF_CONTROL) &&
 161                         IS_ENABLED(CONFIG_SPL_OF_CONTROL)) {
 162                 ret = fdtdec_setup();
 163                 if (ret) {
 164                         debug("fdtdec_setup() returned error %d\n", ret);
 165                         return ret;
 166                 }
 167         }
 168         if (IS_ENABLED(CONFIG_SPL_DM)) {
 169                 ret = dm_init_and_scan(true);
 170                 if (ret) {
 171                         debug("dm_init_and_scan() returned error %d\n", ret);
 172                         return ret;
 173                 }
 174         }
 175         gd->flags |= GD_FLG_SPL_INIT;
 176
 177         return 0;
 178 }
 179
 180 void board_init_r(gd_t *dummy1, ulong dummy2)
 181 {
 182         u32 boot_device;
 183
 184         debug(">>spl:board_init_r()\n");
 185
 186 #if defined(CONFIG_SYS_SPL_MALLOC_START)
 187         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 188                         CONFIG_SYS_SPL_MALLOC_SIZE);
 189         gd->flags |= GD_FLG_FULL_MALLOC_INIT;
 190 #endif
 191         if (!(gd->flags & GD_FLG_SPL_INIT)) {
 192                 if (spl_init())
 193                         hang();
 194         }
 195 #ifndef CONFIG_PPC
 196         /*
 197          * timer_init() does not exist on PPC systems. The timer is initialized
 198          * and enabled (decrementer) in interrupt_init() here.
 199          */
 200         timer_init();
 201 #endif
 202
 203 #ifdef CONFIG_SPL_BOARD_INIT
 204         spl_board_init();
 205 #endif
 206
 207         boot_device = spl_boot_device();
 208         debug("boot device - %d\n", boot_device);
 209         switch (boot_device) {
 210 #ifdef CONFIG_SPL_RAM_DEVICE
 211         case BOOT_DEVICE_RAM:
 212                 spl_ram_load_image();
 213                 break;
 214 #endif
 215 #ifdef CONFIG_SPL_MMC_SUPPORT
 216         case BOOT_DEVICE_MMC1:
 217         case BOOT_DEVICE_MMC2:
 218         case BOOT_DEVICE_MMC2_2:
 219                 spl_mmc_load_image();
 220                 break;
 221 #endif
 222 #ifdef CONFIG_SPL_NAND_SUPPORT
 223         case BOOT_DEVICE_NAND:
 224                 if (spl_nand_load_image() == 0)
 225                         break;
 226                 /* fallthru in case of failure to activate ymodem download */
 227 #endif
 228 #ifdef CONFIG_SPL_ONENAND_SUPPORT
 229         case BOOT_DEVICE_ONENAND:
 230                 spl_onenand_load_image();
 231                 break;
 232 #endif
 233 #ifdef CONFIG_SPL_NOR_SUPPORT
 234         case BOOT_DEVICE_NOR:
 235                 spl_nor_load_image();
 236                 break;
 237 #endif
 238 #ifdef CONFIG_SPL_YMODEM_SUPPORT
 239         case BOOT_DEVICE_UART:
 240                 spl_ymodem_load_image();
 241                 break;
 242 #endif
 243 #ifdef CONFIG_SPL_SPI_SUPPORT
 244         case BOOT_DEVICE_SPI:
 245                 spl_spi_load_image();
 246                 break;
 247 #endif
 248 #ifdef CONFIG_SPL_ETH_SUPPORT
 249         case BOOT_DEVICE_CPGMAC:
 250 #ifdef CONFIG_SPL_ETH_DEVICE
 251                 spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
 252 #else
 253                 spl_net_load_image(NULL);
 254 #endif
 255                 break;
 256 #endif
 257 #ifdef CONFIG_SPL_USBETH_SUPPORT
 258         case BOOT_DEVICE_USBETH:
 259                 spl_net_load_image("usb_ether");
 260                 break;
 261 #endif
 262 #ifdef CONFIG_SPL_USB_SUPPORT
 263         case BOOT_DEVICE_USB:
 264                 spl_usb_load_image();
 265                 break;
 266 #endif
 267 #ifdef CONFIG_SPL_SATA_SUPPORT
 268         case BOOT_DEVICE_SATA:
 269                 spl_sata_load_image();
 270                 break;
 271 #endif
 272 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
 273         case BOOT_DEVICE_BOARD:
 274                 spl_board_load_image();
 275                 break;
 276 #endif
 277         default:
 278 #if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 279                 puts("SPL: Unsupported Boot Device!\n");
 280 #endif
 281                 hang();
 282         }
 283
 284         switch (spl_image.os) {
 285         case IH_OS_U_BOOT:
 286                 debug("Jumping to U-Boot\n");
 287                 break;
 288 #ifdef CONFIG_SPL_OS_BOOT
 289         case IH_OS_LINUX:
 290                 debug("Jumping to Linux\n");
 291                 spl_board_prepare_for_linux();
 292                 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
 293 #endif
 294         default:
 295                 debug("Unsupported OS image.. Jumping nevertheless..\n");
 296         }
 297 #if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
 298         debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
 299               gd->malloc_ptr / 1024);
 300 #endif
 301
 302         debug("loaded - jumping to U-Boot...");
 303         jump_to_image_no_args(&spl_image);
 304 }
 305
 306 /*
 307  * This requires UART clocks to be enabled.  In order for this to work the
 308  * caller must ensure that the gd pointer is valid.
 309  */
 310 void preloader_console_init(void)
 311 {
 312         gd->bd = &bdata;
 313         gd->baudrate = CONFIG_BAUDRATE;
 314
 315         serial_init();          /* serial communications setup */
 316
 317         gd->have_console = 1;
 318
 319         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 320                         U_BOOT_TIME ")\n");
 321 #ifdef CONFIG_SPL_DISPLAY_PRINT
 322         spl_display_print();
 323 #endif
 324 }
 325
 326 /**
 327  * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
 328  *
 329  * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
 330  * for the main board_init_r() execution. This is typically because we need
 331  * more stack space for things like the MMC sub-system.
 332  *
 333  * This function calculates the stack position, copies the global_data into
 334  * place and returns the new stack position. The caller is responsible for
 335  * setting up the sp register.
 336  *
 337  * @return new stack location, or 0 to use the same stack
 338  */
 339 ulong spl_relocate_stack_gd(void)
 340 {
 341 #ifdef CONFIG_SPL_STACK_R
 342         gd_t *new_gd;
 343         ulong ptr;
 344
 345         /* Get stack position: use 8-byte alignment for ABI compliance */
 346         ptr = CONFIG_SPL_STACK_R_ADDR - sizeof(gd_t);
 347         ptr &= ~7;
 348         new_gd = (gd_t *)ptr;
 349         memcpy(new_gd, (void *)gd, sizeof(gd_t));
 350         gd = new_gd;
 351
 352         /* Clear the BSS. */
 353         memset(__bss_start, 0, __bss_end - __bss_start);
 354
 355         return ptr;
 356 #else
 357         return 0;
 358 #endif
 359 }