projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a2c1d73b MR |
1 | /* |
| 2 | * Linker script macros to generate Image header fields. | |
| 3 | * | |
| 4 | * Copyright (C) 2014 ARM Ltd. | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 | */ | |
| 18 | #ifndef __ASM_IMAGE_H | |
| 19 | #define __ASM_IMAGE_H | |
| 20 | ||
| 21 | #ifndef LINKER_SCRIPT | |
| 22 | #error This file should only be included in vmlinux.lds.S | |
| 23 | #endif | |
| 24 | ||
| 25 | /* | |
| 26 | * There aren't any ELF relocations we can use to endian-swap values known only | |
| 27 | * at link time (e.g. the subtraction of two symbol addresses), so we must get | |
| 28 | * the linker to endian-swap certain values before emitting them. | |
| 29 | */ | |
| 30 | #ifdef CONFIG_CPU_BIG_ENDIAN | |
| 31 | #define DATA_LE64(data) \ | |
| 32 | ((((data) & 0x00000000000000ff) << 56) | \ | |
| 33 | (((data) & 0x000000000000ff00) << 40) | \ | |
| 34 | (((data) & 0x0000000000ff0000) << 24) | \ | |
| 35 | (((data) & 0x00000000ff000000) << 8) | \ | |
| 36 | (((data) & 0x000000ff00000000) >> 8) | \ | |
| 37 | (((data) & 0x0000ff0000000000) >> 24) | \ | |
| 38 | (((data) & 0x00ff000000000000) >> 40) | \ | |
| 39 | (((data) & 0xff00000000000000) >> 56)) | |
| 40 | #else | |
| 41 | #define DATA_LE64(data) ((data) & 0xffffffffffffffff) | |
| 42 | #endif | |
| 43 | ||
| 44 | #ifdef CONFIG_CPU_BIG_ENDIAN | |
| 45 | #define __HEAD_FLAG_BE 1 | |
| 46 | #else | |
| 47 | #define __HEAD_FLAG_BE 0 | |
| 48 | #endif | |
| 49 | ||
| 50 | #define __HEAD_FLAGS (__HEAD_FLAG_BE << 0) | |
| 51 | ||
| 52 | /* | |
| 53 | * These will output as part of the Image header, which should be little-endian | |
| 54 | * regardless of the endianness of the kernel. While constant values could be | |
| 55 | * endian swapped in head.S, all are done here for consistency. | |
| 56 | */ | |
| 57 | #define HEAD_SYMBOLS \ | |
| 58 | _kernel_size_le = DATA_LE64(_end - _text); \ | |
| 59 | _kernel_offset_le = DATA_LE64(TEXT_OFFSET); \ | |
| 60 | _kernel_flags_le = DATA_LE64(__HEAD_FLAGS); | |
| 61 | ||
| 62 | #endif /* __ASM_IMAGE_H */ |