git.sur5r.net Git - u-boot/blob - board/qualcomm/dragonboard410c/head.S

   1 /*
   2  * ARM64 header for proper chain-loading with Little Kernel.
   3  *
   4  * Little Kernel shipped with Dragonboard410C boots standard Linux images for
   5  * ARM64. This file adds header that is required to boot U-Boot properly.
   6  *
   7  * For details see:
   8  * https://www.kernel.org/doc/Documentation/arm64/booting.txt
   9  *
  10  * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
  11  *
  12  * SPDX-License-Identifier:     GPL-2.0+
  13  */
  14
  15 #include <config.h>
  16
  17 .global _arm64_header
  18 _arm64_header:
  19         b _start
  20         .word 0
  21         /* Image load offset from start of RAM, little-endian */
  22         .quad   CONFIG_SYS_TEXT_BASE-PHYS_SDRAM_1
  23         /* Effective size of kernel image, little-endian */
  24         .quad   0 /* 0x60000 - ignored */
  25         /* Informative flags, little-endian */
  26         .quad   0
  27         .quad   0                               /* reserved */
  28         .quad   0                               /* reserved */
  29         .quad   0                               /* reserved */
  30         .byte   0x41                            /* Magic number, "ARM\x64" */
  31         .byte   0x52
  32         .byte   0x4d
  33         .byte   0x64
  34         .word   0                               /* reserved */