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