arch/microblaze/cpu/spl.c

   1 /*
   2  * (C) Copyright 2013 - 2014 Xilinx, Inc
   3  *
   4  * Michal Simek <michal.simek@xilinx.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <image.h>
  11 #include <spl.h>
  12 #include <asm/io.h>
  13 #include <asm/u-boot.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 bool boot_linux;
  18
  19 u32 spl_boot_device(void)
  20 {
  21         return BOOT_DEVICE_NOR;
  22 }
  23
  24 /* Board initialization after bss clearance */
  25 void spl_board_init(void)
  26 {
  27         /* enable console uart printing */
  28         preloader_console_init();
  29 }
  30
  31 #ifdef CONFIG_SPL_OS_BOOT
  32 void __noreturn jump_to_image_linux(void *arg)
  33 {
  34         debug("Entering kernel arg pointer: 0x%p\n", arg);
  35         typedef void (*image_entry_arg_t)(char *, ulong, ulong)
  36                 __attribute__ ((noreturn));
  37         image_entry_arg_t image_entry =
  38                 (image_entry_arg_t)spl_image.entry_point;
  39
  40         image_entry(NULL, 0, (ulong)arg);
  41 }
  42 #endif /* CONFIG_SPL_OS_BOOT */
  43
  44 int spl_start_uboot(void)
  45 {
  46 #ifdef CONFIG_SPL_OS_BOOT
  47         if (boot_linux)
  48                 return 0;
  49 #endif
  50
  51         return 1;
  52 }