arm64: Add 4 levels of page tables definition with 4KB pages

/*

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#ifndef __ASM_PGTABLE_4LEVEL_HWDEF_H

#define __ASM_PGTABLE_4LEVEL_HWDEF_H

#define PTRS_PER_PTE		512

#define PTRS_PER_PMD		512

#define PTRS_PER_PUD		512

#define PTRS_PER_PGD		512

/*

 * PGDIR_SHIFT determines the size a top-level page table entry can map.

 */

#define PGDIR_SHIFT		39

#define PGDIR_SIZE		(_AC(1, UL) << PGDIR_SHIFT)

#define PGDIR_MASK		(~(PGDIR_SIZE-1))

/*

 * PUD_SHIFT determines the size the second level page table entry can map.

 */

#define PUD_SHIFT		30

#define PUD_SIZE		(_AC(1, UL) << PUD_SHIFT)

#define PUD_MASK		(~(PUD_SIZE-1))

/*

 * PMD_SHIFT determines the size the third level page table entry can map.

 */

#define PMD_SHIFT		21

#define PMD_SIZE		(_AC(1, UL) << PMD_SHIFT)

#define PMD_MASK		(~(PMD_SIZE-1))

/*

 * section address mask and size definitions.

 */

#define SECTION_SHIFT		21

#define SECTION_SIZE		(_AC(1, UL) << SECTION_SHIFT)

#define SECTION_MASK		(~(SECTION_SIZE-1))

#endif

/*

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#ifndef __ASM_PGTABLE_4LEVEL_TYPES_H

#define __ASM_PGTABLE_4LEVEL_TYPES_H

#include <asm/types.h>

typedef u64 pteval_t;

typedef u64 pmdval_t;

typedef u64 pudval_t;

typedef u64 pgdval_t;

#undef STRICT_MM_TYPECHECKS

#ifdef STRICT_MM_TYPECHECKS

/*

 * These are used to make use of C type-checking..

 */

typedef struct { pteval_t pte; } pte_t;

typedef struct { pmdval_t pmd; } pmd_t;

typedef struct { pudval_t pud; } pud_t;

typedef struct { pgdval_t pgd; } pgd_t;

typedef struct { pteval_t pgprot; } pgprot_t;

#define pte_val(x)	((x).pte)

#define pmd_val(x)	((x).pmd)

#define pud_val(x)	((x).pud)

#define pgd_val(x)	((x).pgd)

#define pgprot_val(x)	((x).pgprot)

#define __pte(x)	((pte_t) { (x) } )

#define __pmd(x)	((pmd_t) { (x) } )

#define __pud(x)	((pud_t) { (x) } )

#define __pgd(x)	((pgd_t) { (x) } )

#define __pgprot(x)	((pgprot_t) { (x) } )

#else	/* !STRICT_MM_TYPECHECKS */

typedef pteval_t pte_t;

typedef pmdval_t pmd_t;

typedef pudval_t pud_t;

typedef pgdval_t pgd_t;

typedef pteval_t pgprot_t;

#define pte_val(x)	(x)

#define pmd_val(x)	(x)

#define pud_val(x)	(x)

#define pgd_val(x)	(x)

#define pgprot_val(x)	(x)

#define __pte(x)	(x)

#define __pmd(x)	(x)

#define __pud(x)	(x)

#define __pgd(x)	(x)

#define __pgprot(x)	(x)

#endif /* STRICT_MM_TYPECHECKS */

#endif /* __ASM_PGTABLE_4LEVEL_TYPES_H */