mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-07 21:33:24 +09:00
87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
![]() |
/*
|
||
|
* (C) Copyright 2017 NVIDIA Corporation <www.nvidia.com>
|
||
|
*
|
||
|
* Derived from Linux kernel v4.14 files:
|
||
|
*
|
||
|
* arch/arm64/include/asm/assembler.h:
|
||
|
* Based on arch/arm/include/asm/assembler.h, arch/arm/mm/proc-macros.S
|
||
|
* Copyright (C) 1996-2000 Russell King
|
||
|
* Copyright (C) 2012 ARM Ltd.
|
||
|
*
|
||
|
* arch/arm64/kernel/head.S:
|
||
|
* Based on arch/arm/kernel/head.S
|
||
|
* Copyright (C) 1994-2002 Russell King
|
||
|
* Copyright (C) 2003-2012 ARM Ltd.
|
||
|
* Authors: Catalin Marinas <catalin.marinas@arm.com>
|
||
|
* Will Deacon <will.deacon@arm.com>
|
||
|
*
|
||
|
* arch/arm64/kernel/image.h:
|
||
|
* Copyright (C) 2014 ARM Ltd.
|
||
|
*
|
||
|
* SPDX-License-Identifier: GPL-2.0
|
||
|
*/
|
||
|
|
||
|
/*
|
||
|
* There aren't any ELF relocations we can use to endian-swap values known only
|
||
|
* at link time (e.g. the subtraction of two symbol addresses), so we must get
|
||
|
* the linker to endian-swap certain values before emitting them.
|
||
|
*
|
||
|
* Note that, in order for this to work when building the ELF64 PIE executable
|
||
|
* (for KASLR), these values should not be referenced via R_AARCH64_ABS64
|
||
|
* relocations, since these are fixed up at runtime rather than at build time
|
||
|
* when PIE is in effect. So we need to split them up in 32-bit high and low
|
||
|
* words.
|
||
|
*/
|
||
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
||
|
#define DATA_LE32(data) \
|
||
|
((((data) & 0x000000ff) << 24) | \
|
||
|
(((data) & 0x0000ff00) << 8) | \
|
||
|
(((data) & 0x00ff0000) >> 8) | \
|
||
|
(((data) & 0xff000000) >> 24))
|
||
|
#else
|
||
|
#define DATA_LE32(data) ((data) & 0xffffffff)
|
||
|
#endif
|
||
|
|
||
|
#define DEFINE_IMAGE_LE64(sym, data) \
|
||
|
sym##_lo32 = DATA_LE32((data) & 0xffffffff); \
|
||
|
sym##_hi32 = DATA_LE32((data) >> 32)
|
||
|
|
||
|
#define __MAX(a, b) (((a) > (b)) ? (a) : (b))
|
||
|
#define __CODE_DATA_SIZE (__bss_start - _start)
|
||
|
#define __BSS_SIZE (__bss_end - __bss_start)
|
||
|
#ifdef CONFIG_SYS_INIT_SP_BSS_OFFSET
|
||
|
#define __MAX_EXTRA_RAM_USAGE __MAX(__BSS_SIZE, CONFIG_SYS_INIT_SP_BSS_OFFSET)
|
||
|
#else
|
||
|
#define __MAX_EXTRA_RAM_USAGE __BSS_SIZE
|
||
|
#endif
|
||
|
#define __MEM_USAGE (__CODE_DATA_SIZE + __MAX_EXTRA_RAM_USAGE)
|
||
|
|
||
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
||
|
#define __HEAD_FLAG_BE 1
|
||
|
#else
|
||
|
#define __HEAD_FLAG_BE 0
|
||
|
#endif
|
||
|
|
||
|
#define __HEAD_FLAG_PAGE_SIZE 1 /* 4K hard-coded */
|
||
|
|
||
|
#define __HEAD_FLAG_PHYS_BASE 1
|
||
|
|
||
|
#define __HEAD_FLAGS ((__HEAD_FLAG_BE << 0) | \
|
||
|
(__HEAD_FLAG_PAGE_SIZE << 1) | \
|
||
|
(__HEAD_FLAG_PHYS_BASE << 3))
|
||
|
|
||
|
#define TEXT_OFFSET (CONFIG_SYS_TEXT_BASE - \
|
||
|
CONFIG_LNX_KRNL_IMG_TEXT_OFFSET_BASE)
|
||
|
|
||
|
/*
|
||
|
* These will output as part of the Image header, which should be little-endian
|
||
|
* regardless of the endianness of the kernel. While constant values could be
|
||
|
* endian swapped in head.S, all are done here for consistency.
|
||
|
*/
|
||
|
#define HEAD_SYMBOLS \
|
||
|
DEFINE_IMAGE_LE64(_kernel_size_le, __MEM_USAGE); \
|
||
|
DEFINE_IMAGE_LE64(_kernel_offset_le, TEXT_OFFSET); \
|
||
|
DEFINE_IMAGE_LE64(_kernel_flags_le, __HEAD_FLAGS);
|
||
|
|
||
|
HEAD_SYMBOLS
|