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 <image.h>
  15 #include <log.h>
  16 #include <mapmem.h>
  17 #include <spl.h>
  18 #include <linux/libfdt.h>
  19
  20 #ifndef CONFIG_SPL_LOAD_FIT_ADDRESS
  21 # define CONFIG_SPL_LOAD_FIT_ADDRESS    0
  22 #endif
  23
  24 static ulong spl_ram_load_read(struct spl_load_info *load, ulong sector,
  25                                ulong count, void *buf)
  26 {
  27         debug("%s: sector %lx, count %lx, buf %lx\n",
  28               __func__, sector, count, (ulong)buf);
  29         memcpy(buf, (void *)(CONFIG_SPL_LOAD_FIT_ADDRESS + sector), count);
  30         return count;
  31 }
  32
  33 static int spl_ram_load_image(struct spl_image_info *spl_image,
  34                               struct spl_boot_device *bootdev)
  35 {
  36         struct image_header *header;
  37
  38         header = (struct image_header *)CONFIG_SPL_LOAD_FIT_ADDRESS;
  39
  40 #if CONFIG_IS_ENABLED(DFU)
  41         if (bootdev->boot_device == BOOT_DEVICE_DFU)
  42                 spl_dfu_cmd(0, "dfu_alt_info_ram", "ram", "0");
  43 #endif
  44
  45         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  46             image_get_magic(header) == FDT_MAGIC) {
  47                 struct spl_load_info load;
  48
  49                 debug("Found FIT\n");
  50                 load.bl_len = 1;
  51                 load.read = spl_ram_load_read;
  52                 spl_load_simple_fit(spl_image, &load, 0, header);
  53         } else {
  54                 ulong u_boot_pos = binman_sym(ulong, u_boot_any, image_pos);
  55
  56                 debug("Legacy image\n");
  57                 /*
  58                  * Get the header.  It will point to an address defined by
  59                  * handoff which will tell where the image located inside
  60                  * the flash.
  61                  */
  62                 debug("u_boot_pos = %lx\n", u_boot_pos);
  63                 if (u_boot_pos == BINMAN_SYM_MISSING) {
  64                         /*
  65                          * No binman support or no information. For now, fix it
  66                          * to the address pointed to by U-Boot.
  67                          */
  68                         u_boot_pos = (ulong)spl_get_load_buffer(-sizeof(*header),
  69                                                                 sizeof(*header));
  70                 }
  71                 header = (struct image_header *)map_sysmem(u_boot_pos, 0);
  72
  73                 spl_parse_image_header(spl_image, header);
  74         }
  75
  76         return 0;
  77 }
  78 #if CONFIG_IS_ENABLED(RAM_DEVICE)
  79 SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
  80 #endif
  81 #if CONFIG_IS_ENABLED(DFU)
  82 SPL_LOAD_IMAGE_METHOD("DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
  83 #endif
  84
  85