common/spl/spl_nor.c

   1 /*
   2  * Copyright (C) 2012 Stefan Roese <sr@denx.de>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <spl.h>
   9
  10 int spl_nor_load_image(void)
  11 {
  12         /*
  13          * Loading of the payload to SDRAM is done with skipping of
  14          * the mkimage header in this SPL NOR driver
  15          */
  16         spl_image.flags |= SPL_COPY_PAYLOAD_ONLY;
  17
  18 #ifdef CONFIG_SPL_OS_BOOT
  19         if (!spl_start_uboot()) {
  20                 const struct image_header *header;
  21
  22                 /*
  23                  * Load Linux from its location in NOR flash to its defined
  24                  * location in SDRAM
  25                  */
  26                 header = (const struct image_header *)CONFIG_SYS_OS_BASE;
  27
  28                 if (image_get_os(header) == IH_OS_LINUX) {
  29                         /* happy - was a Linux */
  30
  31                         spl_parse_image_header(header);
  32
  33                         memcpy((void *)spl_image.load_addr,
  34                                (void *)(CONFIG_SYS_OS_BASE +
  35                                         sizeof(struct image_header)),
  36                                spl_image.size);
  37
  38                         /*
  39                          * Copy DT blob (fdt) to SDRAM. Passing pointer to
  40                          * flash doesn't work (16 KiB should be enough for DT)
  41                          */
  42                         memcpy((void *)CONFIG_SYS_SPL_ARGS_ADDR,
  43                                (void *)(CONFIG_SYS_FDT_BASE),
  44                                (16 << 10));
  45
  46                         return 0;
  47                 } else {
  48                         puts("The Expected Linux image was not found.\n"
  49                              "Please check your NOR configuration.\n"
  50                              "Trying to start u-boot now...\n");
  51                 }
  52         }
  53 #endif
  54
  55         /*
  56          * Load real U-Boot from its location in NOR flash to its
  57          * defined location in SDRAM
  58          */
  59         spl_parse_image_header(
  60                         (const struct image_header *)CONFIG_SYS_UBOOT_BASE);
  61
  62         memcpy((void *)spl_image.load_addr,
  63                (void *)(CONFIG_SYS_UBOOT_BASE + sizeof(struct image_header)),
  64                spl_image.size);
  65
  66         return 0;
  67 }