1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 ARM Ltd.
4 */
5#ifndef __ASM_SPARSEMEM_H
6#define __ASM_SPARSEMEM_H
7
8#define MAX_PHYSMEM_BITS	CONFIG_ARM64_PA_BITS
9
10/*
11 * Section size must be at least 512MB for 64K base
12 * page size config. Otherwise it will be less than
13 * MAX_PAGE_ORDER and the build process will fail.
14 */
15#ifdef CONFIG_ARM64_64K_PAGES
16#define SECTION_SIZE_BITS 29
17
18#else
19
20/*
21 * Section size must be at least 128MB for 4K base
22 * page size config. Otherwise PMD based huge page
23 * entries could not be created for vmemmap mappings.
24 * 16K follows 4K for simplicity.
25 */
26#define SECTION_SIZE_BITS 27
27#endif /* CONFIG_ARM64_64K_PAGES */
28
29#endif
30