git.sur5r.net Git - u-boot/blob - 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 <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 /* Unknown U-Boot size, let's assume it will not be more than 200 KB */
  27 #define CONFIG_SYS_MONITOR_LEN  (200 * 1024)
  28 #endif
  29
  30 u32 *boot_params_ptr = NULL;
  31 struct spl_image_info spl_image;
  32
  33 /* Define board data structure */
  34 static bd_t bdata __attribute__ ((section(".data")));
  35
  36 /*
  37  * Default function to determine if u-boot or the OS should
  38  * be started. This implementation always returns 1.
  39  *
  40  * Please implement your own board specific funcion to do this.
  41  *
  42  * RETURN
  43  * 0 to not start u-boot
  44  * positive if u-boot should start
  45  */
  46 #ifdef CONFIG_SPL_OS_BOOT
  47 __weak int spl_start_uboot(void)
  48 {
  49         puts("SPL: Please implement spl_start_uboot() for your board\n");
  50         puts("SPL: Direct Linux boot not active!\n");
  51         return 1;
  52 }
  53 #endif
  54
  55 /*
  56  * Weak default function for board specific cleanup/preparation before
  57  * Linux boot. Some boards/platforms might not need it, so just provide
  58  * an empty stub here.
  59  */
  60 __weak void spl_board_prepare_for_linux(void)
  61 {
  62         /* Nothing to do! */
  63 }
  64
  65 void spl_set_header_raw_uboot(void)
  66 {
  67         spl_image.size = CONFIG_SYS_MONITOR_LEN;
  68         spl_image.entry_point = CONFIG_SYS_UBOOT_START;
  69         spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
  70         spl_image.os = IH_OS_U_BOOT;
  71         spl_image.name = "U-Boot";
  72 }
  73
  74 void spl_parse_image_header(const struct image_header *header)
  75 {
  76         u32 header_size = sizeof(struct image_header);
  77
  78         if (image_get_magic(header) == IH_MAGIC) {
  79                 if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) {
  80                         /*
  81                          * On some system (e.g. powerpc), the load-address and
  82                          * entry-point is located at address 0. We can't load
  83                          * to 0-0x40. So skip header in this case.
  84                          */
  85                         spl_image.load_addr = image_get_load(header);
  86                         spl_image.entry_point = image_get_ep(header);
  87                         spl_image.size = image_get_data_size(header);
  88                 } else {
  89                         spl_image.entry_point = image_get_load(header);
  90                         /* Load including the header */
  91                         spl_image.load_addr = spl_image.entry_point -
  92                                 header_size;
  93                         spl_image.size = image_get_data_size(header) +
  94                                 header_size;
  95                 }
  96                 spl_image.os = image_get_os(header);
  97                 spl_image.name = image_get_name(header);
  98                 debug("spl: payload image: %.*s load addr: 0x%x size: %d\n",
  99                         (int)sizeof(spl_image.name), spl_image.name,
 100                         spl_image.load_addr, spl_image.size);
 101         } else {
 102                 /* Signature not found - assume u-boot.bin */
 103                 debug("mkimage signature not found - ih_magic = %x\n",
 104                         header->ih_magic);
 105                 spl_set_header_raw_uboot();
 106         }
 107 }
 108
 109 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 110 {
 111         typedef void __noreturn (*image_entry_noargs_t)(void);
 112
 113         image_entry_noargs_t image_entry =
 114                         (image_entry_noargs_t) spl_image->entry_point;
 115
 116         debug("image entry point: 0x%X\n", spl_image->entry_point);
 117         image_entry();
 118 }
 119
 120 #ifdef CONFIG_SPL_RAM_DEVICE
 121 static void spl_ram_load_image(void)
 122 {
 123         const struct image_header *header;
 124
 125         /*
 126          * Get the header.  It will point to an address defined by handoff
 127          * which will tell where the image located inside the flash. For
 128          * now, it will temporary fixed to address pointed by U-Boot.
 129          */
 130         header = (struct image_header *)
 131                 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
 132
 133         spl_parse_image_header(header);
 134 }
 135 #endif
 136
 137 void board_init_r(gd_t *dummy1, ulong dummy2)
 138 {
 139         u32 boot_device;
 140         debug(">>spl:board_init_r()\n");
 141
 142 #if defined(CONFIG_SYS_SPL_MALLOC_START)
 143         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 144                         CONFIG_SYS_SPL_MALLOC_SIZE);
 145         gd->flags |= GD_FLG_FULL_MALLOC_INIT;
 146 #elif defined(CONFIG_SYS_MALLOC_F_LEN)
 147         gd->malloc_limit = gd->malloc_base + CONFIG_SYS_MALLOC_F_LEN;
 148         gd->malloc_ptr = 0;
 149 #endif
 150
 151 #ifndef CONFIG_PPC
 152         /*
 153          * timer_init() does not exist on PPC systems. The timer is initialized
 154          * and enabled (decrementer) in interrupt_init() here.
 155          */
 156         timer_init();
 157 #endif
 158
 159 #ifdef CONFIG_SPL_BOARD_INIT
 160         spl_board_init();
 161 #endif
 162
 163         boot_device = spl_boot_device();
 164         debug("boot device - %d\n", boot_device);
 165         switch (boot_device) {
 166 #ifdef CONFIG_SPL_RAM_DEVICE
 167         case BOOT_DEVICE_RAM:
 168                 spl_ram_load_image();
 169                 break;
 170 #endif
 171 #ifdef CONFIG_SPL_MMC_SUPPORT
 172         case BOOT_DEVICE_MMC1:
 173         case BOOT_DEVICE_MMC2:
 174         case BOOT_DEVICE_MMC2_2:
 175                 spl_mmc_load_image();
 176                 break;
 177 #endif
 178 #ifdef CONFIG_SPL_NAND_SUPPORT
 179         case BOOT_DEVICE_NAND:
 180                 spl_nand_load_image();
 181                 break;
 182 #endif
 183 #ifdef CONFIG_SPL_ONENAND_SUPPORT
 184         case BOOT_DEVICE_ONENAND:
 185                 spl_onenand_load_image();
 186                 break;
 187 #endif
 188 #ifdef CONFIG_SPL_NOR_SUPPORT
 189         case BOOT_DEVICE_NOR:
 190                 spl_nor_load_image();
 191                 break;
 192 #endif
 193 #ifdef CONFIG_SPL_YMODEM_SUPPORT
 194         case BOOT_DEVICE_UART:
 195                 spl_ymodem_load_image();
 196                 break;
 197 #endif
 198 #ifdef CONFIG_SPL_SPI_SUPPORT
 199         case BOOT_DEVICE_SPI:
 200                 spl_spi_load_image();
 201                 break;
 202 #endif
 203 #ifdef CONFIG_SPL_ETH_SUPPORT
 204         case BOOT_DEVICE_CPGMAC:
 205 #ifdef CONFIG_SPL_ETH_DEVICE
 206                 spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
 207 #else
 208                 spl_net_load_image(NULL);
 209 #endif
 210                 break;
 211 #endif
 212 #ifdef CONFIG_SPL_USBETH_SUPPORT
 213         case BOOT_DEVICE_USBETH:
 214                 spl_net_load_image("usb_ether");
 215                 break;
 216 #endif
 217 #ifdef CONFIG_SPL_USB_SUPPORT
 218         case BOOT_DEVICE_USB:
 219                 spl_usb_load_image();
 220                 break;
 221 #endif
 222 #ifdef CONFIG_SPL_SATA_SUPPORT
 223         case BOOT_DEVICE_SATA:
 224                 spl_sata_load_image();
 225                 break;
 226 #endif
 227         default:
 228                 debug("SPL: Un-supported Boot Device\n");
 229                 hang();
 230         }
 231
 232         switch (spl_image.os) {
 233         case IH_OS_U_BOOT:
 234                 debug("Jumping to U-Boot\n");
 235                 break;
 236 #ifdef CONFIG_SPL_OS_BOOT
 237         case IH_OS_LINUX:
 238                 debug("Jumping to Linux\n");
 239                 spl_board_prepare_for_linux();
 240                 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
 241 #endif
 242         default:
 243                 debug("Unsupported OS image.. Jumping nevertheless..\n");
 244         }
 245 #if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
 246         debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
 247               gd->malloc_ptr / 1024);
 248 #endif
 249
 250         jump_to_image_no_args(&spl_image);
 251 }
 252
 253 /*
 254  * This requires UART clocks to be enabled.  In order for this to work the
 255  * caller must ensure that the gd pointer is valid.
 256  */
 257 void preloader_console_init(void)
 258 {
 259         gd->bd = &bdata;
 260         gd->baudrate = CONFIG_BAUDRATE;
 261
 262         serial_init();          /* serial communications setup */
 263
 264         gd->have_console = 1;
 265
 266         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 267                         U_BOOT_TIME ")\n");
 268 #ifdef CONFIG_SPL_DISPLAY_PRINT
 269         spl_display_print();
 270 #endif
 271 }