common/spl/spl_nor.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2012 Stefan Roese <sr@denx.de>
   4  */
   5
   6 #include <common.h>
   7 #include <spl.h>
   8
   9 #ifdef CONFIG_SPL_LOAD_FIT
  10 static ulong spl_nor_load_read(struct spl_load_info *load, ulong sector,
  11                                ulong count, void *buf)
  12 {
  13         debug("%s: sector %lx, count %lx, buf %p\n",
  14               __func__, sector, count, buf);
  15         memcpy(buf, (void *)sector, count);
  16
  17         return count;
  18 }
  19 #endif
  20
  21 static int spl_nor_load_image(struct spl_image_info *spl_image,
  22                               struct spl_boot_device *bootdev)
  23 {
  24         int ret;
  25         __maybe_unused const struct image_header *header;
  26         __maybe_unused struct spl_load_info load;
  27
  28         /*
  29          * Loading of the payload to SDRAM is done with skipping of
  30          * the mkimage header in this SPL NOR driver
  31          */
  32         spl_image->flags |= SPL_COPY_PAYLOAD_ONLY;
  33
  34 #ifdef CONFIG_SPL_OS_BOOT
  35         if (!spl_start_uboot()) {
  36                 /*
  37                  * Load Linux from its location in NOR flash to its defined
  38                  * location in SDRAM
  39                  */
  40                 header = (const struct image_header *)CONFIG_SYS_OS_BASE;
  41 #ifdef CONFIG_SPL_LOAD_FIT
  42                 if (image_get_magic(header) == FDT_MAGIC) {
  43                         debug("Found FIT\n");
  44                         load.bl_len = 1;
  45                         load.read = spl_nor_load_read;
  46
  47                         ret = spl_load_simple_fit(spl_image, &load,
  48                                                   CONFIG_SYS_OS_BASE,
  49                                                   (void *)header);
  50
  51                         return ret;
  52                 }
  53 #endif
  54                 if (image_get_os(header) == IH_OS_LINUX) {
  55                         /* happy - was a Linux */
  56
  57                         ret = spl_parse_image_header(spl_image, header);
  58                         if (ret)
  59                                 return ret;
  60
  61                         memcpy((void *)spl_image->load_addr,
  62                                (void *)(CONFIG_SYS_OS_BASE +
  63                                         sizeof(struct image_header)),
  64                                spl_image->size);
  65 #ifdef CONFIG_SYS_FDT_BASE
  66                         spl_image->arg = (void *)CONFIG_SYS_FDT_BASE;
  67 #endif
  68
  69                         return 0;
  70                 } else {
  71                         puts("The Expected Linux image was not found.\n"
  72                              "Please check your NOR configuration.\n"
  73                              "Trying to start u-boot now...\n");
  74                 }
  75         }
  76 #endif
  77
  78         /*
  79          * Load real U-Boot from its location in NOR flash to its
  80          * defined location in SDRAM
  81          */
  82 #ifdef CONFIG_SPL_LOAD_FIT
  83         header = (const struct image_header *)CONFIG_SYS_UBOOT_BASE;
  84         if (image_get_magic(header) == FDT_MAGIC) {
  85                 debug("Found FIT format U-Boot\n");
  86                 load.bl_len = 1;
  87                 load.read = spl_nor_load_read;
  88                 ret = spl_load_simple_fit(spl_image, &load,
  89                                           CONFIG_SYS_UBOOT_BASE,
  90                                           (void *)header);
  91
  92                 return ret;
  93         }
  94 #endif
  95         ret = spl_parse_image_header(spl_image,
  96                         (const struct image_header *)CONFIG_SYS_UBOOT_BASE);
  97         if (ret)
  98                 return ret;
  99
 100         memcpy((void *)(unsigned long)spl_image->load_addr,
 101                (void *)(CONFIG_SYS_UBOOT_BASE + sizeof(struct image_header)),
 102                spl_image->size);
 103
 104         return 0;
 105 }
 106 SPL_LOAD_IMAGE_METHOD("NOR", 0, BOOT_DEVICE_NOR, spl_nor_load_image);