LXR linux/arch/arc/include/asm/pgtable.h

   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 __ASSEMBLY__
  23
  24extern char empty_zero_page[PAGE_SIZE];
  25#define ZERO_PAGE(vaddr)        (virt_to_page(empty_zero_page))
  26
  27extern 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 /* __ASSEMBLY__ */
  33
  34#endif
  35