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 static ulong spl_nor_load_read(struct spl_load_info *load, ulong sector,
  10                                ulong count, void *buf)
  11 {
  12         debug("%s: sector %lx, count %lx, buf %p\n",
  13               __func__, sector, count, buf);
  14         memcpy(buf, (void *)sector, count);
  15
  16         return count;
  17 }
  18
  19 unsigned long __weak spl_nor_get_uboot_base(void)
  20 {
  21         return CONFIG_SYS_UBOOT_BASE;
  22 }
  23
  24 static int spl_nor_load_image(struct spl_image_info *spl_image,
  25                               struct spl_boot_device *bootdev)
  26 {
  27         __maybe_unused const struct image_header *header;
  28         __maybe_unused struct spl_load_info load;
  29
  30         /*
  31          * Loading of the payload to SDRAM is done with skipping of
  32          * the mkimage header in this SPL NOR driver
  33          */
  34         spl_image->flags |= SPL_COPY_PAYLOAD_ONLY;
  35
  36 #ifdef CONFIG_SPL_OS_BOOT
  37         if (!spl_start_uboot()) {
  38                 /*
  39                  * Load Linux from its location in NOR flash to its defined
  40                  * location in SDRAM
  41                  */
  42                 header = (const struct image_header *)CONFIG_SYS_OS_BASE;
  43 #ifdef CONFIG_SPL_LOAD_FIT
  44                 if (image_get_magic(header) == FDT_MAGIC) {
  45                         int ret;
  46
  47                         debug("Found FIT\n");
  48                         load.bl_len = 1;
  49                         load.read = spl_nor_load_read;
  50
  51                         ret = spl_load_simple_fit(spl_image, &load,
  52                                                   CONFIG_SYS_OS_BASE,
  53                                                   (void *)header);
  54
  55 #if defined CONFIG_SYS_SPL_ARGS_ADDR && defined CONFIG_CMD_SPL_NOR_OFS
  56                         memcpy((void *)CONFIG_SYS_SPL_ARGS_ADDR,
  57                                (void *)CONFIG_CMD_SPL_NOR_OFS,
  58                                CONFIG_CMD_SPL_WRITE_SIZE);
  59 #endif
  60                         return ret;
  61                 }
  62 #endif
  63                 if (image_get_os(header) == IH_OS_LINUX) {
  64                         /* happy - was a Linux */
  65                         int ret;
  66
  67                         ret = spl_parse_image_header(spl_image, header);
  68                         if (ret)
  69                                 return ret;
  70
  71                         memcpy((void *)spl_image->load_addr,
  72                                (void *)(CONFIG_SYS_OS_BASE +
  73                                         sizeof(struct image_header)),
  74                                spl_image->size);
  75 #ifdef CONFIG_SYS_FDT_BASE
  76                         spl_image->arg = (void *)CONFIG_SYS_FDT_BASE;
  77 #endif
  78
  79                         return 0;
  80                 } else {
  81                         puts("The Expected Linux image was not found.\n"
  82                              "Please check your NOR configuration.\n"
  83                              "Trying to start u-boot now...\n");
  84                 }
  85         }
  86 #endif
  87
  88         /*
  89          * Load real U-Boot from its location in NOR flash to its
  90          * defined location in SDRAM
  91          */
  92 #ifdef CONFIG_SPL_LOAD_FIT
  93         header = (const struct image_header *)spl_nor_get_uboot_base();
  94         if (image_get_magic(header) == FDT_MAGIC) {
  95                 debug("Found FIT format U-Boot\n");
  96                 load.bl_len = 1;
  97                 load.read = spl_nor_load_read;
  98                 return spl_load_simple_fit(spl_image, &load,
  99                                            spl_nor_get_uboot_base(),
 100                                            (void *)header);
 101         }
 102 #endif
 103         if (IS_ENABLED(CONFIG_SPL_LOAD_IMX_CONTAINER)) {
 104                 load.bl_len = 1;
 105                 load.read = spl_nor_load_read;
 106                 return spl_load_imx_container(spl_image, &load,
 107                                               spl_nor_get_uboot_base());
 108         }
 109
 110         /* Legacy image handling */
 111         if (IS_ENABLED(CONFIG_SPL_LEGACY_IMAGE_SUPPORT)) {
 112                 load.bl_len = 1;
 113                 load.read = spl_nor_load_read;
 114                 return spl_load_legacy_img(spl_image, &load,
 115                                            spl_nor_get_uboot_base());
 116         }
 117
 118         return 0;
 119 }
 120 SPL_LOAD_IMAGE_METHOD("NOR", 0, BOOT_DEVICE_NOR, spl_nor_load_image);