arch/microblaze/cpu/spl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2013 - 2014 Xilinx, Inc
   4  *
   5  * Michal Simek <michal.simek@xilinx.com>
   6  */
   7
   8 #include <common.h>
   9 #include <command.h>
  10 #include <image.h>
  11 #include <log.h>
  12 #include <spl.h>
  13 #include <asm/io.h>
  14 #include <asm/u-boot.h>
  15
  16 bool boot_linux;
  17
  18 void board_boot_order(u32 *spl_boot_list)
  19 {
  20         spl_boot_list[0] = BOOT_DEVICE_NOR;
  21         spl_boot_list[1] = BOOT_DEVICE_RAM;
  22         spl_boot_list[2] = BOOT_DEVICE_SPI;
  23 }
  24
  25 /* Board initialization after bss clearance */
  26 void spl_board_init(void)
  27 {
  28         /* enable console uart printing */
  29         preloader_console_init();
  30 }
  31
  32 #ifdef CONFIG_SPL_OS_BOOT
  33 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
  34 {
  35         debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
  36         typedef void (*image_entry_arg_t)(char *, ulong, ulong)
  37                 __attribute__ ((noreturn));
  38         image_entry_arg_t image_entry =
  39                 (image_entry_arg_t)spl_image->entry_point;
  40
  41         image_entry(NULL, 0, (ulong)spl_image->arg);
  42 }
  43 #endif /* CONFIG_SPL_OS_BOOT */
  44
  45 int spl_start_uboot(void)
  46 {
  47 #ifdef CONFIG_SPL_OS_BOOT
  48         if (boot_linux)
  49                 return 0;
  50 #endif
  51
  52         return 1;
  53 }
  54
  55 int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  56 {
  57         __asm__ __volatile__ ("mts rmsr, r0;" \
  58                               "bra r0");
  59
  60         return 0;
  61 }