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 <binman_sym.h>
  15 #include <mapmem.h>
  16 #include <spl.h>
  17 #include <libfdt.h>
  18
  19 #ifndef CONFIG_SPL_LOAD_FIT_ADDRESS
  20 # define CONFIG_SPL_LOAD_FIT_ADDRESS    0
  21 #endif
  22
  23 static ulong spl_ram_load_read(struct spl_load_info *load, ulong sector,
  24                                ulong count, void *buf)
  25 {
  26         debug("%s: sector %lx, count %lx, buf %lx\n",
  27               __func__, sector, count, (ulong)buf);
  28         memcpy(buf, (void *)(CONFIG_SPL_LOAD_FIT_ADDRESS + sector), count);
  29         return count;
  30 }
  31
  32 static int spl_ram_load_image(struct spl_image_info *spl_image,
  33                               struct spl_boot_device *bootdev)
  34 {
  35         struct image_header *header;
  36
  37         header = (struct image_header *)CONFIG_SPL_LOAD_FIT_ADDRESS;
  38
  39 #if defined(CONFIG_SPL_DFU_SUPPORT)
  40         if (bootdev->boot_device == BOOT_DEVICE_DFU)
  41                 spl_dfu_cmd(0, "dfu_alt_info_ram", "ram", "0");
  42 #endif
  43
  44         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  45             image_get_magic(header) == FDT_MAGIC) {
  46                 struct spl_load_info load;
  47
  48                 debug("Found FIT\n");
  49                 load.bl_len = 1;
  50                 load.read = spl_ram_load_read;
  51                 spl_load_simple_fit(spl_image, &load, 0, header);
  52         } else {
  53                 ulong u_boot_pos = binman_sym(ulong, u_boot_any, pos);
  54
  55                 debug("Legacy image\n");
  56                 /*
  57                  * Get the header.  It will point to an address defined by
  58                  * handoff which will tell where the image located inside
  59                  * the flash.
  60                  */
  61                 debug("u_boot_pos = %lx\n", u_boot_pos);
  62                 if (u_boot_pos == BINMAN_SYM_MISSING) {
  63                         /*
  64                          * No binman support or no information. For now, fix it
  65                          * to the address pointed to by U-Boot.
  66                          */
  67                         u_boot_pos = CONFIG_SYS_TEXT_BASE -
  68                                         sizeof(struct image_header);
  69                 }
  70                 header = (struct image_header *)map_sysmem(u_boot_pos, 0);
  71
  72                 spl_parse_image_header(spl_image, header);
  73         }
  74
  75         return 0;
  76 }
  77 #if defined(CONFIG_SPL_RAM_DEVICE)
  78 SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
  79 #endif
  80 #if defined(CONFIG_SPL_DFU_SUPPORT)
  81 SPL_LOAD_IMAGE_METHOD("DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
  82 #endif
  83
  84