1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #include <asm/page.h> 3 4 /* 5 * .boot.data section is shared between the decompressor code and the 6 * decompressed kernel. The decompressor will store values in it, and copy 7 * over to the decompressed image before starting it. 8 * 9 * .boot.data variables are kept in separate .boot.data.<var name> sections, 10 * which are sorted by alignment first, then by name before being merged 11 * into single .boot.data section. This way big holes cased by page aligned 12 * structs are avoided and linker produces consistent result. 13 */ 14 #define BOOT_DATA \ 15 . = ALIGN(PAGE_SIZE); \ 16 .boot.data : { \ 17 __boot_data_start = .; \ 18 *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.boot.data*))) \ 19 __boot_data_end = .; \ 20 } 21 22 /* 23 * .boot.preserved.data is similar to .boot.data, but it is not part of the 24 * .init section and thus will be preserved for later use in the decompressed 25 * kernel. 26 */ 27 #define BOOT_DATA_PRESERVED \ 28 . = ALIGN(PAGE_SIZE); \ 29 .boot.preserved.data : { \ 30 __boot_data_preserved_start = .; \ 31 *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.boot.preserved.data*))) \ 32 __boot_data_preserved_end = .; \ 33 } 34