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 <image.h>
   8 #include <spl.h>
   9
  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
  20 unsigned long __weak spl_nor_get_uboot_base(void)
  21 {
  22         return CONFIG_SYS_UBOOT_BASE;
  23 }
  24
  25 static int spl_nor_load_image(struct spl_image_info *spl_image,
  26                               struct spl_boot_device *bootdev)
  27 {
  28         __maybe_unused const struct image_header *header;
  29         __maybe_unused struct spl_load_info load;
  30
  31         /*
  32          * Loading of the payload to SDRAM is done with skipping of
  33          * the mkimage header in this SPL NOR driver
  34          */
  35         spl_image->flags |= SPL_COPY_PAYLOAD_ONLY;
  36
  37 #ifdef CONFIG_SPL_OS_BOOT
  38         if (!spl_start_uboot()) {
  39                 /*
  40                  * Load Linux from its location in NOR flash to its defined
  41                  * location in SDRAM
  42                  */
  43                 header = (const struct image_header *)CONFIG_SYS_OS_BASE;
  44 #ifdef CONFIG_SPL_LOAD_FIT
  45                 if (image_get_magic(header) == FDT_MAGIC) {
  46                         int ret;
  47
  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 #if defined CONFIG_SYS_SPL_ARGS_ADDR && defined CONFIG_CMD_SPL_NOR_OFS
  57                         memcpy((void *)CONFIG_SYS_SPL_ARGS_ADDR,
  58                                (void *)CONFIG_CMD_SPL_NOR_OFS,
  59                                CONFIG_CMD_SPL_WRITE_SIZE);
  60 #endif
  61                         return ret;
  62                 }
  63 #endif
  64                 if (image_get_os(header) == IH_OS_LINUX) {
  65                         /* happy - was a Linux */
  66                         int ret;
  67
  68                         ret = spl_parse_image_header(spl_image, header);
  69                         if (ret)
  70                                 return ret;
  71
  72                         memcpy((void *)spl_image->load_addr,
  73                                (void *)(CONFIG_SYS_OS_BASE +
  74                                         sizeof(struct image_header)),
  75                                spl_image->size);
  76 #ifdef CONFIG_SYS_FDT_BASE
  77                         spl_image->arg = (void *)CONFIG_SYS_FDT_BASE;
  78 #endif
  79
  80                         return 0;
  81                 } else {
  82                         puts("The Expected Linux image was not found.\n"
  83                              "Please check your NOR configuration.\n"
  84                              "Trying to start u-boot now...\n");
  85                 }
  86         }
  87 #endif
  88
  89         /*
  90          * Load real U-Boot from its location in NOR flash to its
  91          * defined location in SDRAM
  92          */
  93 #ifdef CONFIG_SPL_LOAD_FIT
  94         header = (const struct image_header *)spl_nor_get_uboot_base();
  95         if (image_get_magic(header) == FDT_MAGIC) {
  96                 debug("Found FIT format U-Boot\n");
  97                 load.bl_len = 1;
  98                 load.read = spl_nor_load_read;
  99                 return spl_load_simple_fit(spl_image, &load,
 100                                            spl_nor_get_uboot_base(),
 101                                            (void *)header);
 102         }
 103 #endif
 104         if (IS_ENABLED(CONFIG_SPL_LOAD_IMX_CONTAINER)) {
 105                 load.bl_len = 1;
 106                 load.read = spl_nor_load_read;
 107                 return spl_load_imx_container(spl_image, &load,
 108                                               spl_nor_get_uboot_base());
 109         }
 110
 111         /* Legacy image handling */
 112         if (IS_ENABLED(CONFIG_SPL_LEGACY_IMAGE_SUPPORT)) {
 113                 load.bl_len = 1;
 114                 load.read = spl_nor_load_read;
 115                 return spl_load_legacy_img(spl_image, &load,
 116                                            spl_nor_get_uboot_base());
 117         }
 118
 119         return 0;
 120 }
 121 SPL_LOAD_IMAGE_METHOD("NOR", 0, BOOT_DEVICE_NOR, spl_nor_load_image);