| /* SPDX-License-Identifier: GPL-2.0-only */ | |
| /* | |
| * Copyright (C) 2012 ARM Ltd. | |
| */ | |
| #ifndef __ASM_SPARSEMEM_H | |
| #define __ASM_SPARSEMEM_H | |
| #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 |