| Tom Rini | 10e4779 | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Stephen Warren | 80a9365 | 2018-01-03 14:31:51 -0700 | [diff] [blame] | 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. |
| Stephen Warren | 80a9365 | 2018-01-03 14:31:51 -0700 | [diff] [blame] | 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 */ |