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_parse_image_header(const struct image_header *header)
  66 {
  67         u32 header_size = sizeof(struct image_header);
  68
  69         if (image_get_magic(header) == IH_MAGIC) {
  70                 if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) {
  71                         /*
  72                          * On some system (e.g. powerpc), the load-address and
  73                          * entry-point is located at address 0. We can't load
  74                          * to 0-0x40. So skip header in this case.
  75                          */
  76                         spl_image.load_addr = image_get_load(header);
  77                         spl_image.entry_point = image_get_ep(header);
  78                         spl_image.size = image_get_data_size(header);
  79                 } else {
  80                         spl_image.entry_point = image_get_load(header);
  81                         /* Load including the header */
  82                         spl_image.load_addr = spl_image.entry_point -
  83                                 header_size;
  84                         spl_image.size = image_get_data_size(header) +
  85                                 header_size;
  86                 }
  87                 spl_image.os = image_get_os(header);
  88                 spl_image.name = image_get_name(header);
  89                 debug("spl: payload image: %.*s load addr: 0x%x size: %d\n",
  90                         (int)sizeof(spl_image.name), spl_image.name,
  91                         spl_image.load_addr, spl_image.size);
  92         } else {
  93                 /* Signature not found - assume u-boot.bin */
  94                 debug("mkimage signature not found - ih_magic = %x\n",
  95                         header->ih_magic);
  96                 spl_image.size = CONFIG_SYS_MONITOR_LEN;
  97                 spl_image.entry_point = CONFIG_SYS_UBOOT_START;
  98                 spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
  99                 spl_image.os = IH_OS_U_BOOT;
 100                 spl_image.name = "U-Boot";
 101         }
 102 }
 103
 104 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 105 {
 106         typedef void __noreturn (*image_entry_noargs_t)(void);
 107
 108         image_entry_noargs_t image_entry =
 109                         (image_entry_noargs_t) spl_image->entry_point;
 110
 111         debug("image entry point: 0x%X\n", spl_image->entry_point);
 112         image_entry();
 113 }
 114
 115 #ifdef CONFIG_SPL_RAM_DEVICE
 116 static void spl_ram_load_image(void)
 117 {
 118         const struct image_header *header;
 119
 120         /*
 121          * Get the header.  It will point to an address defined by handoff
 122          * which will tell where the image located inside the flash. For
 123          * now, it will temporary fixed to address pointed by U-Boot.
 124          */
 125         header = (struct image_header *)
 126                 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
 127
 128         spl_parse_image_header(header);
 129 }
 130 #endif
 131
 132 void board_init_r(gd_t *dummy1, ulong dummy2)
 133 {
 134         u32 boot_device;
 135         debug(">>spl:board_init_r()\n");
 136
 137 #ifdef CONFIG_SYS_SPL_MALLOC_START
 138         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 139                         CONFIG_SYS_SPL_MALLOC_SIZE);
 140 #endif
 141
 142 #ifndef CONFIG_PPC
 143         /*
 144          * timer_init() does not exist on PPC systems. The timer is initialized
 145          * and enabled (decrementer) in interrupt_init() here.
 146          */
 147         timer_init();
 148 #endif
 149
 150 #ifdef CONFIG_SPL_BOARD_INIT
 151         spl_board_init();
 152 #endif
 153
 154         boot_device = spl_boot_device();
 155         debug("boot device - %d\n", boot_device);
 156         switch (boot_device) {
 157 #ifdef CONFIG_SPL_RAM_DEVICE
 158         case BOOT_DEVICE_RAM:
 159                 spl_ram_load_image();
 160                 break;
 161 #endif
 162 #ifdef CONFIG_SPL_MMC_SUPPORT
 163         case BOOT_DEVICE_MMC1:
 164         case BOOT_DEVICE_MMC2:
 165         case BOOT_DEVICE_MMC2_2:
 166                 spl_mmc_load_image();
 167                 break;
 168 #endif
 169 #ifdef CONFIG_SPL_NAND_SUPPORT
 170         case BOOT_DEVICE_NAND:
 171                 spl_nand_load_image();
 172                 break;
 173 #endif
 174 #ifdef CONFIG_SPL_ONENAND_SUPPORT
 175         case BOOT_DEVICE_ONENAND:
 176                 spl_onenand_load_image();
 177                 break;
 178 #endif
 179 #ifdef CONFIG_SPL_NOR_SUPPORT
 180         case BOOT_DEVICE_NOR:
 181                 spl_nor_load_image();
 182                 break;
 183 #endif
 184 #ifdef CONFIG_SPL_YMODEM_SUPPORT
 185         case BOOT_DEVICE_UART:
 186                 spl_ymodem_load_image();
 187                 break;
 188 #endif
 189 #ifdef CONFIG_SPL_SPI_SUPPORT
 190         case BOOT_DEVICE_SPI:
 191                 spl_spi_load_image();
 192                 break;
 193 #endif
 194 #ifdef CONFIG_SPL_ETH_SUPPORT
 195         case BOOT_DEVICE_CPGMAC:
 196 #ifdef CONFIG_SPL_ETH_DEVICE
 197                 spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
 198 #else
 199                 spl_net_load_image(NULL);
 200 #endif
 201                 break;
 202 #endif
 203 #ifdef CONFIG_SPL_USBETH_SUPPORT
 204         case BOOT_DEVICE_USBETH:
 205                 spl_net_load_image("usb_ether");
 206                 break;
 207 #endif
 208 #ifdef CONFIG_SPL_USB_SUPPORT
 209         case BOOT_DEVICE_USB:
 210                 spl_usb_load_image();
 211                 break;
 212 #endif
 213 #ifdef CONFIG_SPL_SATA_SUPPORT
 214         case BOOT_DEVICE_SATA:
 215                 spl_sata_load_image();
 216                 break;
 217 #endif
 218         default:
 219                 debug("SPL: Un-supported Boot Device\n");
 220                 hang();
 221         }
 222
 223         switch (spl_image.os) {
 224         case IH_OS_U_BOOT:
 225                 debug("Jumping to U-Boot\n");
 226                 break;
 227 #ifdef CONFIG_SPL_OS_BOOT
 228         case IH_OS_LINUX:
 229                 debug("Jumping to Linux\n");
 230                 spl_board_prepare_for_linux();
 231                 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
 232 #endif
 233         default:
 234                 debug("Unsupported OS image.. Jumping nevertheless..\n");
 235         }
 236         jump_to_image_no_args(&spl_image);
 237 }
 238
 239 /*
 240  * This requires UART clocks to be enabled.  In order for this to work the
 241  * caller must ensure that the gd pointer is valid.
 242  */
 243 void preloader_console_init(void)
 244 {
 245         gd->bd = &bdata;
 246         gd->baudrate = CONFIG_BAUDRATE;
 247
 248         serial_init();          /* serial communications setup */
 249
 250         gd->have_console = 1;
 251
 252         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 253                         U_BOOT_TIME ")\n");
 254 #ifdef CONFIG_SPL_DISPLAY_PRINT
 255         spl_display_print();
 256 #endif
 257 }