/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_PGTABLE_3LEVEL_DEFS_H
#define _ASM_X86_PGTABLE_3LEVEL_DEFS_H

#ifndef __ASSEMBLER__
#include <linux/types.h>

typedef u64     pteval_t;
typedef u64     pmdval_t;
typedef u64     pudval_t;
typedef u64     p4dval_t;
typedef u64     pgdval_t;
typedef u64     pgprotval_t;

typedef union {
        struct {
                unsigned long pte_low, pte_high;
        };
        pteval_t pte;
} pte_t;

typedef union {
        struct {
                unsigned long pmd_low, pmd_high;
        };
        pmdval_t pmd;
} pmd_t;
#endif  /* !__ASSEMBLER__ */

#define ARCH_PAGE_TABLE_SYNC_MASK       PGTBL_PMD_MODIFIED

/*
 * PGDIR_SHIFT determines what a top-level page table entry can map
 */
#define PGDIR_SHIFT     30
#define PTRS_PER_PGD    4

/*
 * PMD_SHIFT determines the size of the area a middle-level
 * page table can map
 */
#define PMD_SHIFT       21
#define PTRS_PER_PMD    512

/*
 * entries per page directory level
 */
#define PTRS_PER_PTE    512

#define MAX_POSSIBLE_PHYSMEM_BITS       36
#define PGD_KERNEL_START        (CONFIG_PAGE_OFFSET >> PGDIR_SHIFT)

#endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */