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         ulong addr;
  28
  29         debug("%s: sector %lx, count %lx, buf %lx\n",
  30               __func__, sector, count, (ulong)buf);
  31
  32         addr = (ulong)CONFIG_SPL_LOAD_FIT_ADDRESS + sector;
  33         if (CONFIG_IS_ENABLED(IMAGE_PRE_LOAD))
  34                 addr += image_load_offset;
  35
  36         memcpy(buf, (void *)addr, count);
  37
  38         return count;
  39 }
  40
  41 static int spl_ram_load_image(struct spl_image_info *spl_image,
  42                               struct spl_boot_device *bootdev)
  43 {
  44         struct image_header *header;
  45
  46         header = (struct image_header *)CONFIG_SPL_LOAD_FIT_ADDRESS;
  47
  48         if (CONFIG_IS_ENABLED(IMAGE_PRE_LOAD)) {
  49                 unsigned long addr = (unsigned long)header;
  50                 int ret = image_pre_load(addr);
  51
  52                 if (ret)
  53                         return ret;
  54
  55                 addr += image_load_offset;
  56                 header = (struct image_header *)addr;
  57         }
  58
  59 #if CONFIG_IS_ENABLED(DFU)
  60         if (bootdev->boot_device == BOOT_DEVICE_DFU)
  61                 spl_dfu_cmd(0, "dfu_alt_info_ram", "ram", "0");
  62 #endif
  63
  64         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  65             image_get_magic(header) == FDT_MAGIC) {
  66                 struct spl_load_info load;
  67
  68                 debug("Found FIT\n");
  69                 load.bl_len = 1;
  70                 load.read = spl_ram_load_read;
  71                 spl_load_simple_fit(spl_image, &load, 0, header);
  72         } else {
  73                 ulong u_boot_pos = binman_sym(ulong, u_boot_any, image_pos);
  74
  75                 debug("Legacy image\n");
  76                 /*
  77                  * Get the header.  It will point to an address defined by
  78                  * handoff which will tell where the image located inside
  79                  * the flash.
  80                  */
  81                 debug("u_boot_pos = %lx\n", u_boot_pos);
  82                 if (u_boot_pos == BINMAN_SYM_MISSING) {
  83                         /*
  84                          * No binman support or no information. For now, fix it
  85                          * to the address pointed to by U-Boot.
  86                          */
  87                         u_boot_pos = (ulong)spl_get_load_buffer(-sizeof(*header),
  88                                                                 sizeof(*header));
  89                 }
  90                 header = (struct image_header *)map_sysmem(u_boot_pos, 0);
  91
  92                 spl_parse_image_header(spl_image, bootdev, header);
  93         }
  94
  95         return 0;
  96 }
  97 #if CONFIG_IS_ENABLED(RAM_DEVICE)
  98 SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
  99 #endif
 100 #if CONFIG_IS_ENABLED(DFU)
 101 SPL_LOAD_IMAGE_METHOD("DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
 102 #endif