[linux-2.6-block.git] / arch / arc / include / asm / pgtable.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 */

#ifndef _ASM_ARC_PGTABLE_H
#define _ASM_ARC_PGTABLE_H

#include <linux/bits.h>

#include <asm/pgtable-levels.h>
#include <asm/pgtable-bits-arcv2.h>
#include <asm/page.h>
#include <asm/mmu.h>

/*
 * Number of entries a user land program use.
 * TASK_SIZE is the maximum vaddr that can be used by a userland program.
 */
#define	USER_PTRS_PER_PGD	(TASK_SIZE / PGDIR_SIZE)

#ifndef __ASSEMBLER__

extern char empty_zero_page[PAGE_SIZE];
#define ZERO_PAGE(vaddr)	(virt_to_page(empty_zero_page))

extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);

/* to cope with aliasing VIPT cache */
#define HAVE_ARCH_UNMAPPED_AREA

#endif /* __ASSEMBLER__ */

#endif
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0-only */
	2	/*
	3	* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
	4	*/
	5
	6	#ifndef _ASM_ARC_PGTABLE_H
	7	#define _ASM_ARC_PGTABLE_H
	8
	9	#include <linux/bits.h>
	10
	11	#include <asm/pgtable-levels.h>
	12	#include <asm/pgtable-bits-arcv2.h>
	13	#include <asm/page.h>
	14	#include <asm/mmu.h>
	15
	16	/*
	17	* Number of entries a user land program use.
	18	* TASK_SIZE is the maximum vaddr that can be used by a userland program.
	19	*/
	20	#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
	21
	22	#ifndef __ASSEMBLER__
	23
	24	extern char empty_zero_page[PAGE_SIZE];
	25	#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
	26
	27	extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
	28
	29	/* to cope with aliasing VIPT cache */
	30	#define HAVE_ARCH_UNMAPPED_AREA
	31
	32	#endif /* __ASSEMBLER__ */
	33
	34	#endif