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

   1/*
   2 * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 */
   8
   9
  10#ifndef _ASM_ARC_HUGEPAGE_H
  11#define _ASM_ARC_HUGEPAGE_H
  12
  13#include <linux/types.h>
  14#define __ARCH_USE_5LEVEL_HACK
  15#include <asm-generic/pgtable-nopmd.h>
  16
  17static inline pte_t pmd_pte(pmd_t pmd)
  18{
  19        return __pte(pmd_val(pmd));
  20}
  21
  22static inline pmd_t pte_pmd(pte_t pte)
  23{
  24        return __pmd(pte_val(pte));
  25}
  26
  27#define pmd_wrprotect(pmd)      pte_pmd(pte_wrprotect(pmd_pte(pmd)))
  28#define pmd_mkwrite(pmd)        pte_pmd(pte_mkwrite(pmd_pte(pmd)))
  29#define pmd_mkdirty(pmd)        pte_pmd(pte_mkdirty(pmd_pte(pmd)))
  30#define pmd_mkold(pmd)          pte_pmd(pte_mkold(pmd_pte(pmd)))
  31#define pmd_mkyoung(pmd)        pte_pmd(pte_mkyoung(pmd_pte(pmd)))
  32#define pmd_mkhuge(pmd)         pte_pmd(pte_mkhuge(pmd_pte(pmd)))
  33#define pmd_mknotpresent(pmd)   pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
  34#define pmd_mkclean(pmd)        pte_pmd(pte_mkclean(pmd_pte(pmd)))
  35
  36#define pmd_write(pmd)          pte_write(pmd_pte(pmd))
  37#define pmd_young(pmd)          pte_young(pmd_pte(pmd))
  38#define pmd_pfn(pmd)            pte_pfn(pmd_pte(pmd))
  39#define pmd_dirty(pmd)          pte_dirty(pmd_pte(pmd))
  40
  41#define mk_pmd(page, prot)      pte_pmd(mk_pte(page, prot))
  42
  43#define pmd_trans_huge(pmd)     (pmd_val(pmd) & _PAGE_HW_SZ)
  44
  45#define pfn_pmd(pfn, prot)      (__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
  46
  47static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
  48{
  49        /*
  50         * open-coded pte_modify() with additional retaining of HW_SZ bit
  51         * so that pmd_trans_huge() remains true for this PMD
  52         */
  53        return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
  54}
  55
  56static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
  57                              pmd_t *pmdp, pmd_t pmd)
  58{
  59        *pmdp = pmd;
  60}
  61
  62extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
  63                                 pmd_t *pmd);
  64
  65/* Generic variants assume pgtable_t is struct page *, hence need for these */
  66#define __HAVE_ARCH_PGTABLE_DEPOSIT
  67extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
  68                                       pgtable_t pgtable);
  69
  70#define __HAVE_ARCH_PGTABLE_WITHDRAW
  71extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
  72
  73#define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
  74extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
  75                                unsigned long end);
  76
  77/* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
  78#define pmdp_establish generic_pmdp_establish
  79
  80#endif
  81