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@amd.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 static ulong spl_ram_load_read(struct spl_load_info *load, ulong sector,
  21                                ulong count, void *buf)
  22 {
  23         ulong addr;
  24
  25         debug("%s: sector %lx, count %lx, buf %lx\n",
  26               __func__, sector, count, (ulong)buf);
  27
  28         addr = (ulong)CONFIG_SPL_LOAD_FIT_ADDRESS + sector;
  29         if (CONFIG_IS_ENABLED(IMAGE_PRE_LOAD))
  30                 addr += image_load_offset;
  31
  32         memcpy(buf, (void *)addr, count);
  33
  34         return count;
  35 }
  36
  37 static int spl_ram_load_image(struct spl_image_info *spl_image,
  38                               struct spl_boot_device *bootdev)
  39 {
  40         struct legacy_img_hdr *header;
  41         int ret;
  42
  43         header = (struct legacy_img_hdr *)CONFIG_SPL_LOAD_FIT_ADDRESS;
  44
  45         if (CONFIG_IS_ENABLED(IMAGE_PRE_LOAD)) {
  46                 unsigned long addr = (unsigned long)header;
  47                 ret = image_pre_load(addr);
  48
  49                 if (ret)
  50                         return ret;
  51
  52                 addr += image_load_offset;
  53                 header = (struct legacy_img_hdr *)addr;
  54         }
  55
  56 #if CONFIG_IS_ENABLED(DFU)
  57         if (bootdev->boot_device == BOOT_DEVICE_DFU)
  58                 spl_dfu_cmd(0, "dfu_alt_info_ram", "ram", "0");
  59 #endif
  60
  61         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  62             image_get_magic(header) == FDT_MAGIC) {
  63                 struct spl_load_info load;
  64
  65                 debug("Found FIT\n");
  66                 load.bl_len = 1;
  67                 load.read = spl_ram_load_read;
  68                 ret = spl_load_simple_fit(spl_image, &load, 0, header);
  69         } else {
  70                 ulong u_boot_pos = spl_get_image_pos();
  71
  72                 debug("Legacy image\n");
  73                 /*
  74                  * Get the header.  It will point to an address defined by
  75                  * handoff which will tell where the image located inside
  76                  * the flash.
  77                  */
  78                 debug("u_boot_pos = %lx\n", u_boot_pos);
  79                 if (u_boot_pos == BINMAN_SYM_MISSING) {
  80                         /*
  81                          * No binman support or no information. For now, fix it
  82                          * to the address pointed to by U-Boot.
  83                          */
  84                         u_boot_pos = (ulong)spl_get_load_buffer(-sizeof(*header),
  85                                                                 sizeof(*header));
  86                 }
  87                 header = (struct legacy_img_hdr *)map_sysmem(u_boot_pos, 0);
  88
  89                 ret = spl_parse_image_header(spl_image, bootdev, header);
  90         }
  91
  92         return ret;
  93 }
  94 #if CONFIG_IS_ENABLED(RAM_DEVICE)
  95 SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
  96 #endif
  97 #if CONFIG_IS_ENABLED(DFU)
  98 SPL_LOAD_IMAGE_METHOD("DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
  99 #endif