common/spl/spl_ram.c

   1 /*
   2  * (C) Copyright 2016
   3  * Xilinx, Inc.
   4  *
   5  * (C) Copyright 2016
   6  * Toradex AG
   7  *
   8  * Michal Simek <michal.simek@xilinx.com>
   9  * Stefan Agner <stefan.agner@toradex.com>
  10  *
  11  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13 #include <common.h>
  14 #include <spl.h>
  15 #include <libfdt.h>
  16
  17 #ifndef CONFIG_SPL_LOAD_FIT_ADDRESS
  18 # define CONFIG_SPL_LOAD_FIT_ADDRESS    0
  19 #endif
  20
  21 static ulong spl_ram_load_read(struct spl_load_info *load, ulong sector,
  22                                ulong count, void *buf)
  23 {
  24         debug("%s: sector %lx, count %lx, buf %lx\n",
  25               __func__, sector, count, (ulong)buf);
  26         memcpy(buf, (void *)(CONFIG_SPL_LOAD_FIT_ADDRESS + sector), count);
  27         return count;
  28 }
  29
  30 static int spl_ram_load_image(struct spl_image_info *spl_image,
  31                               struct spl_boot_device *bootdev)
  32 {
  33         struct image_header *header;
  34
  35         header = (struct image_header *)CONFIG_SPL_LOAD_FIT_ADDRESS;
  36
  37 #if defined(CONFIG_SPL_DFU_SUPPORT)
  38         if (bootdev->boot_device == BOOT_DEVICE_DFU)
  39                 spl_dfu_cmd(0, "dfu_alt_info_ram", "ram", "0");
  40 #endif
  41
  42         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  43             image_get_magic(header) == FDT_MAGIC) {
  44                 struct spl_load_info load;
  45
  46                 debug("Found FIT\n");
  47                 load.bl_len = 1;
  48                 load.read = spl_ram_load_read;
  49                 spl_load_simple_fit(spl_image, &load, 0, header);
  50         } else {
  51                 debug("Legacy image\n");
  52                 /*
  53                  * Get the header.  It will point to an address defined by
  54                  * handoff which will tell where the image located inside
  55                  * the flash. For now, it will temporary fixed to address
  56                  * pointed by U-Boot.
  57                  */
  58                 header = (struct image_header *)
  59                         (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
  60
  61                 spl_parse_image_header(spl_image, header);
  62         }
  63
  64         return 0;
  65 }
  66 #if defined(CONFIG_SPL_RAM_DEVICE)
  67 SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
  68 #endif
  69 #if defined(CONFIG_SPL_DFU_SUPPORT)
  70 SPL_LOAD_IMAGE_METHOD("DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
  71 #endif
  72
  73