| /* 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 |
