common/spl/spl_ram.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2016
   4  * Xilinx, Inc.
   5  *
   6  * (C) Copyright 2016
   7  * Toradex AG
   8  *
   9  * Michal Simek <michal.simek@xilinx.com>
  10  * Stefan Agner <stefan.agner@toradex.com>
  11  */
  12 #include <common.h>
  13 #include <binman_sym.h>
  14 #include <mapmem.h>
  15 #include <spl.h>
  16 #include <linux/libfdt.h>
  17
  18 #ifndef CONFIG_SPL_LOAD_FIT_ADDRESS
  19 # define CONFIG_SPL_LOAD_FIT_ADDRESS    0
  20 #endif
  21
  22 static ulong spl_ram_load_read(struct spl_load_info *load, ulong sector,
  23                                ulong count, void *buf)
  24 {
  25         debug("%s: sector %lx, count %lx, buf %lx\n",
  26               __func__, sector, count, (ulong)buf);
  27         memcpy(buf, (void *)(CONFIG_SPL_LOAD_FIT_ADDRESS + sector), count);
  28         return count;
  29 }
  30
  31 static int spl_ram_load_image(struct spl_image_info *spl_image,
  32                               struct spl_boot_device *bootdev)
  33 {
  34         struct image_header *header;
  35
  36         header = (struct image_header *)CONFIG_SPL_LOAD_FIT_ADDRESS;
  37
  38 #if CONFIG_IS_ENABLED(DFU)
  39         if (bootdev->boot_device == BOOT_DEVICE_DFU)
  40                 spl_dfu_cmd(0, "dfu_alt_info_ram", "ram", "0");
  41 #endif
  42
  43         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  44             image_get_magic(header) == FDT_MAGIC) {
  45                 struct spl_load_info load;
  46
  47                 debug("Found FIT\n");
  48                 load.bl_len = 1;
  49                 load.read = spl_ram_load_read;
  50                 spl_load_simple_fit(spl_image, &load, 0, header);
  51         } else {
  52                 ulong u_boot_pos = binman_sym(ulong, u_boot_any, image_pos);
  53
  54                 debug("Legacy image\n");
  55                 /*
  56                  * Get the header.  It will point to an address defined by
  57                  * handoff which will tell where the image located inside
  58                  * the flash.
  59                  */
  60                 debug("u_boot_pos = %lx\n", u_boot_pos);
  61                 if (u_boot_pos == BINMAN_SYM_MISSING) {
  62                         /*
  63                          * No binman support or no information. For now, fix it
  64                          * to the address pointed to by U-Boot.
  65                          */
  66                         u_boot_pos = (ulong)spl_get_load_buffer(-sizeof(*header),
  67                                                                 sizeof(*header));
  68                 }
  69                 header = (struct image_header *)map_sysmem(u_boot_pos, 0);
  70
  71                 spl_parse_image_header(spl_image, header);
  72         }
  73
  74         return 0;
  75 }
  76 #if CONFIG_IS_ENABLED(RAM_DEVICE)
  77 SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
  78 #endif
  79 #if CONFIG_IS_ENABLED(DFU)
  80 SPL_LOAD_IMAGE_METHOD("DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
  81 #endif
  82
  83