diff options
Diffstat (limited to 'arch/arm64/include/asm/sparsemem.h')
| -rw-r--r-- | arch/arm64/include/asm/sparsemem.h | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/arch/arm64/include/asm/sparsemem.h b/arch/arm64/include/asm/sparsemem.h index 74a9d301819f..4b73463423c3 100644 --- a/arch/arm64/include/asm/sparsemem.h +++ b/arch/arm64/include/asm/sparsemem.h @@ -1,24 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2012 ARM Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __ASM_SPARSEMEM_H #define __ASM_SPARSEMEM_H -#ifdef CONFIG_SPARSEMEM -#define MAX_PHYSMEM_BITS 48 -#define SECTION_SIZE_BITS 30 -#endif +#define MAX_PHYSMEM_BITS CONFIG_ARM64_PA_BITS + +/* + * Section size must be at least 512MB for 64K base + * page size config. Otherwise it will be less than + * (MAX_ORDER - 1) and the build process will fail. + */ +#ifdef CONFIG_ARM64_64K_PAGES +#define SECTION_SIZE_BITS 29 + +#else + +/* + * Section size must be at least 128MB for 4K base + * page size config. Otherwise PMD based huge page + * entries could not be created for vmemmap mappings. + * 16K follows 4K for simplicity. + */ +#define SECTION_SIZE_BITS 27 +#endif /* CONFIG_ARM64_64K_PAGES */ #endif |