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 unsigned long __weak spl_nor_get_uboot_base(void)
  22 {
  23         return CONFIG_SYS_UBOOT_BASE;
  24 }
  25
  26 static int spl_nor_load_image(struct spl_image_info *spl_image,
  27                               struct spl_boot_device *bootdev)
  28 {
  29         int ret;
  30         __maybe_unused const struct image_header *header;
  31         __maybe_unused struct spl_load_info load;
  32
  33         /*
  34          * Loading of the payload to SDRAM is done with skipping of
  35          * the mkimage header in this SPL NOR driver
  36          */
  37         spl_image->flags |= SPL_COPY_PAYLOAD_ONLY;
  38
  39 #ifdef CONFIG_SPL_OS_BOOT
  40         if (!spl_start_uboot()) {
  41                 /*
  42                  * Load Linux from its location in NOR flash to its defined
  43                  * location in SDRAM
  44                  */
  45                 header = (const struct image_header *)CONFIG_SYS_OS_BASE;
  46 #ifdef CONFIG_SPL_LOAD_FIT
  47                 if (image_get_magic(header) == FDT_MAGIC) {
  48                         debug("Found FIT\n");
  49                         load.bl_len = 1;
  50                         load.read = spl_nor_load_read;
  51
  52                         ret = spl_load_simple_fit(spl_image, &load,
  53                                                   CONFIG_SYS_OS_BASE,
  54                                                   (void *)header);
  55
  56                         return ret;
  57                 }
  58 #endif
  59                 if (image_get_os(header) == IH_OS_LINUX) {
  60                         /* happy - was a Linux */
  61
  62                         ret = spl_parse_image_header(spl_image, header);
  63                         if (ret)
  64                                 return ret;
  65
  66                         memcpy((void *)spl_image->load_addr,
  67                                (void *)(CONFIG_SYS_OS_BASE +
  68                                         sizeof(struct image_header)),
  69                                spl_image->size);
  70 #ifdef CONFIG_SYS_FDT_BASE
  71                         spl_image->arg = (void *)CONFIG_SYS_FDT_BASE;
  72 #endif
  73
  74                         return 0;
  75                 } else {
  76                         puts("The Expected Linux image was not found.\n"
  77                              "Please check your NOR configuration.\n"
  78                              "Trying to start u-boot now...\n");
  79                 }
  80         }
  81 #endif
  82
  83         /*
  84          * Load real U-Boot from its location in NOR flash to its
  85          * defined location in SDRAM
  86          */
  87 #ifdef CONFIG_SPL_LOAD_FIT
  88         header = (const struct image_header *)spl_nor_get_uboot_base();
  89         if (image_get_magic(header) == FDT_MAGIC) {
  90                 debug("Found FIT format U-Boot\n");
  91                 load.bl_len = 1;
  92                 load.read = spl_nor_load_read;
  93                 ret = spl_load_simple_fit(spl_image, &load,
  94                                           spl_nor_get_uboot_base(),
  95                                           (void *)header);
  96
  97                 return ret;
  98         }
  99 #endif
 100         ret = spl_parse_image_header(spl_image,
 101                         (const struct image_header *)spl_nor_get_uboot_base());
 102         if (ret)
 103                 return ret;
 104
 105         memcpy((void *)(unsigned long)spl_image->load_addr,
 106                (void *)(spl_nor_get_uboot_base() + sizeof(struct image_header)),
 107                spl_image->size);
 108
 109         return 0;
 110 }
 111 SPL_LOAD_IMAGE_METHOD("NOR", 0, BOOT_DEVICE_NOR, spl_nor_load_image);