arch/arm/include/asm/boot0-linux-kernel-header.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * (C) Copyright 2017 NVIDIA Corporation <www.nvidia.com>
   4  *
   5  * Derived from Linux kernel v4.14 files:
   6  *
   7  * arch/arm64/include/asm/assembler.h:
   8  * Based on arch/arm/include/asm/assembler.h, arch/arm/mm/proc-macros.S
   9  * Copyright (C) 1996-2000 Russell King
  10  * Copyright (C) 2012 ARM Ltd.
  11  *
  12  * arch/arm64/kernel/head.S:
  13  * Based on arch/arm/kernel/head.S
  14  * Copyright (C) 1994-2002 Russell King
  15  * Copyright (C) 2003-2012 ARM Ltd.
  16  * Authors:     Catalin Marinas <catalin.marinas@arm.com>
  17  *              Will Deacon <will.deacon@arm.com>
  18  *
  19  * arch/arm64/kernel/image.h:
  20  * Copyright (C) 2014 ARM Ltd.
  21  */
  22
  23         /*
  24          * Emit a 64-bit absolute little endian symbol reference in a way that
  25          * ensures that it will be resolved at build time, even when building a
  26          * PIE binary. This requires cooperation from the linker script, which
  27          * must emit the lo32/hi32 halves individually.
  28          */
  29         .macro  le64sym, sym
  30         .long   \sym\()_lo32
  31         .long   \sym\()_hi32
  32         .endm
  33
  34 .globl _start
  35 _start:
  36         /*
  37          * DO NOT MODIFY. Image header expected by Linux boot-loaders.
  38          */
  39         b       reset                           /* branch to kernel start, magic */
  40         .long   0                               /* reserved */
  41         le64sym _kernel_offset_le               /* Image load offset from start of RAM, little-endian */
  42         le64sym _kernel_size_le                 /* Effective size of kernel image, little-endian */
  43         le64sym _kernel_flags_le                /* Informative flags, little-endian */
  44         .quad   0                               /* reserved */
  45         .quad   0                               /* reserved */
  46         .quad   0                               /* reserved */
  47         .ascii  "ARM\x64"                       /* Magic number */
  48         .long   0                               /* reserved */