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         int ret;
  13         /*
  14          * Loading of the payload to SDRAM is done with skipping of
  15          * the mkimage header in this SPL NOR driver
  16          */
  17         spl_image.flags |= SPL_COPY_PAYLOAD_ONLY;
  18
  19 #ifdef CONFIG_SPL_OS_BOOT
  20         if (!spl_start_uboot()) {
  21                 const struct image_header *header;
  22
  23                 /*
  24                  * Load Linux from its location in NOR flash to its defined
  25                  * location in SDRAM
  26                  */
  27                 header = (const struct image_header *)CONFIG_SYS_OS_BASE;
  28
  29                 if (image_get_os(header) == IH_OS_LINUX) {
  30                         /* happy - was a Linux */
  31
  32                         ret = spl_parse_image_header(header);
  33                         if (ret)
  34                                 return ret;
  35
  36                         memcpy((void *)spl_image.load_addr,
  37                                (void *)(CONFIG_SYS_OS_BASE +
  38                                         sizeof(struct image_header)),
  39                                spl_image.size);
  40
  41                         /*
  42                          * Copy DT blob (fdt) to SDRAM. Passing pointer to
  43                          * flash doesn't work (16 KiB should be enough for DT)
  44                          */
  45                         memcpy((void *)CONFIG_SYS_SPL_ARGS_ADDR,
  46                                (void *)(CONFIG_SYS_FDT_BASE),
  47                                (16 << 10));
  48
  49                         return 0;
  50                 } else {
  51                         puts("The Expected Linux image was not found.\n"
  52                              "Please check your NOR configuration.\n"
  53                              "Trying to start u-boot now...\n");
  54                 }
  55         }
  56 #endif
  57
  58         /*
  59          * Load real U-Boot from its location in NOR flash to its
  60          * defined location in SDRAM
  61          */
  62         ret = spl_parse_image_header(
  63                         (const struct image_header *)CONFIG_SYS_UBOOT_BASE);
  64         if (ret)
  65                 return ret;
  66
  67         memcpy((void *)(unsigned long)spl_image.load_addr,
  68                (void *)(CONFIG_SYS_UBOOT_BASE + sizeof(struct image_header)),
  69                spl_image.size);
  70
  71         return 0;
  72 }