common/spl/spl_nand.c

   1 /*
   2  * Copyright (C) 2011
   3  * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7 #include <common.h>
   8 #include <config.h>
   9 #include <spl.h>
  10 #include <asm/io.h>
  11 #include <nand.h>
  12
  13 void spl_nand_load_image(void)
  14 {
  15         struct image_header *header;
  16         int *src __attribute__((unused));
  17         int *dst __attribute__((unused));
  18
  19         debug("spl: nand - using hw ecc\n");
  20         nand_init();
  21
  22         /*use CONFIG_SYS_TEXT_BASE as temporary storage area */
  23         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
  24 #ifdef CONFIG_SPL_OS_BOOT
  25         if (!spl_start_uboot()) {
  26                 /*
  27                  * load parameter image
  28                  * load to temp position since nand_spl_load_image reads
  29                  * a whole block which is typically larger than
  30                  * CONFIG_CMD_SPL_WRITE_SIZE therefore may overwrite
  31                  * following sections like BSS
  32                  */
  33                 nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
  34                         CONFIG_CMD_SPL_WRITE_SIZE,
  35                         (void *)CONFIG_SYS_TEXT_BASE);
  36                 /* copy to destintion */
  37                 for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
  38                                 src = (int *)CONFIG_SYS_TEXT_BASE;
  39                                 src < (int *)(CONFIG_SYS_TEXT_BASE +
  40                                 CONFIG_CMD_SPL_WRITE_SIZE);
  41                                 src++, dst++) {
  42                         writel(readl(src), dst);
  43                 }
  44
  45                 /* load linux */
  46                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  47                         CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  48                 spl_parse_image_header(header);
  49                 if (header->ih_os == IH_OS_LINUX) {
  50                         /* happy - was a linux */
  51                         nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
  52                                 spl_image.size, (void *)spl_image.load_addr);
  53                         nand_deselect();
  54                         return;
  55                 } else {
  56                         puts("The Expected Linux image was not "
  57                                 "found. Please check your NAND "
  58                                 "configuration.\n");
  59                         puts("Trying to start u-boot now...\n");
  60                 }
  61         }
  62 #endif
  63 #ifdef CONFIG_NAND_ENV_DST
  64         nand_spl_load_image(CONFIG_ENV_OFFSET,
  65                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  66         spl_parse_image_header(header);
  67         nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
  68                 (void *)spl_image.load_addr);
  69 #ifdef CONFIG_ENV_OFFSET_REDUND
  70         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
  71                 CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
  72         spl_parse_image_header(header);
  73         nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
  74                 (void *)spl_image.load_addr);
  75 #endif
  76 #endif
  77         /* Load u-boot */
  78         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  79                 sizeof(*header), (void *)header);
  80         spl_parse_image_header(header);
  81         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  82                 spl_image.size, (void *)spl_image.load_addr);
  83         nand_deselect();
  84 }