1*a2c1d73bSMark Rutland /* 2*a2c1d73bSMark Rutland * Linker script macros to generate Image header fields. 3*a2c1d73bSMark Rutland * 4*a2c1d73bSMark Rutland * Copyright (C) 2014 ARM Ltd. 5*a2c1d73bSMark Rutland * 6*a2c1d73bSMark Rutland * This program is free software; you can redistribute it and/or modify 7*a2c1d73bSMark Rutland * it under the terms of the GNU General Public License version 2 as 8*a2c1d73bSMark Rutland * published by the Free Software Foundation. 9*a2c1d73bSMark Rutland * 10*a2c1d73bSMark Rutland * This program is distributed in the hope that it will be useful, 11*a2c1d73bSMark Rutland * but WITHOUT ANY WARRANTY; without even the implied warranty of 12*a2c1d73bSMark Rutland * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13*a2c1d73bSMark Rutland * GNU General Public License for more details. 14*a2c1d73bSMark Rutland * 15*a2c1d73bSMark Rutland * You should have received a copy of the GNU General Public License 16*a2c1d73bSMark Rutland * along with this program. If not, see <http://www.gnu.org/licenses/>. 17*a2c1d73bSMark Rutland */ 18*a2c1d73bSMark Rutland #ifndef __ASM_IMAGE_H 19*a2c1d73bSMark Rutland #define __ASM_IMAGE_H 20*a2c1d73bSMark Rutland 21*a2c1d73bSMark Rutland #ifndef LINKER_SCRIPT 22*a2c1d73bSMark Rutland #error This file should only be included in vmlinux.lds.S 23*a2c1d73bSMark Rutland #endif 24*a2c1d73bSMark Rutland 25*a2c1d73bSMark Rutland /* 26*a2c1d73bSMark Rutland * There aren't any ELF relocations we can use to endian-swap values known only 27*a2c1d73bSMark Rutland * at link time (e.g. the subtraction of two symbol addresses), so we must get 28*a2c1d73bSMark Rutland * the linker to endian-swap certain values before emitting them. 29*a2c1d73bSMark Rutland */ 30*a2c1d73bSMark Rutland #ifdef CONFIG_CPU_BIG_ENDIAN 31*a2c1d73bSMark Rutland #define DATA_LE64(data) \ 32*a2c1d73bSMark Rutland ((((data) & 0x00000000000000ff) << 56) | \ 33*a2c1d73bSMark Rutland (((data) & 0x000000000000ff00) << 40) | \ 34*a2c1d73bSMark Rutland (((data) & 0x0000000000ff0000) << 24) | \ 35*a2c1d73bSMark Rutland (((data) & 0x00000000ff000000) << 8) | \ 36*a2c1d73bSMark Rutland (((data) & 0x000000ff00000000) >> 8) | \ 37*a2c1d73bSMark Rutland (((data) & 0x0000ff0000000000) >> 24) | \ 38*a2c1d73bSMark Rutland (((data) & 0x00ff000000000000) >> 40) | \ 39*a2c1d73bSMark Rutland (((data) & 0xff00000000000000) >> 56)) 40*a2c1d73bSMark Rutland #else 41*a2c1d73bSMark Rutland #define DATA_LE64(data) ((data) & 0xffffffffffffffff) 42*a2c1d73bSMark Rutland #endif 43*a2c1d73bSMark Rutland 44*a2c1d73bSMark Rutland #ifdef CONFIG_CPU_BIG_ENDIAN 45*a2c1d73bSMark Rutland #define __HEAD_FLAG_BE 1 46*a2c1d73bSMark Rutland #else 47*a2c1d73bSMark Rutland #define __HEAD_FLAG_BE 0 48*a2c1d73bSMark Rutland #endif 49*a2c1d73bSMark Rutland 50*a2c1d73bSMark Rutland #define __HEAD_FLAGS (__HEAD_FLAG_BE << 0) 51*a2c1d73bSMark Rutland 52*a2c1d73bSMark Rutland /* 53*a2c1d73bSMark Rutland * These will output as part of the Image header, which should be little-endian 54*a2c1d73bSMark Rutland * regardless of the endianness of the kernel. While constant values could be 55*a2c1d73bSMark Rutland * endian swapped in head.S, all are done here for consistency. 56*a2c1d73bSMark Rutland */ 57*a2c1d73bSMark Rutland #define HEAD_SYMBOLS \ 58*a2c1d73bSMark Rutland _kernel_size_le = DATA_LE64(_end - _text); \ 59*a2c1d73bSMark Rutland _kernel_offset_le = DATA_LE64(TEXT_OFFSET); \ 60*a2c1d73bSMark Rutland _kernel_flags_le = DATA_LE64(__HEAD_FLAGS); 61*a2c1d73bSMark Rutland 62*a2c1d73bSMark Rutland #endif /* __ASM_IMAGE_H */ 63