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 */ 49