Cregit: Linux 6.15: sparsemem.h

Contributors: 5
Author	Tokens	Token Proportion	Commits	Commit Proportion
Catalin Marinas	17	43.59%	1	20.00%
Sudarshan Rajagopalan	11	28.21%	1	20.00%
Ard Biesheuvel	8	20.51%	1	20.00%
Thomas Gleixner	2	5.13%	1	20.00%
Kirill A. Shutemov	1	2.56%	1	20.00%
Total	39		5

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

#include <asm/pgtable-prot.h>

#define MAX_PHYSMEM_BITS		PHYS_MASK_SHIFT
#define MAX_POSSIBLE_PHYSMEM_BITS	(52)

/*
 * Section size must be at least 512MB for 64K base
 * page size config. Otherwise it will be less than
 * MAX_PAGE_ORDER 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