arch/arc/include/asm/hugepage.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
   4  */
   5
   6
   7 #ifndef _ASM_ARC_HUGEPAGE_H
   8 #define _ASM_ARC_HUGEPAGE_H
   9
  10 #include <linux/types.h>
  11 #include <asm-generic/pgtable-nopmd.h>
  12
  13 static inline pte_t pmd_pte(pmd_t pmd)
  14 {
  15         return __pte(pmd_val(pmd));
  16 }
  17
  18 static inline pmd_t pte_pmd(pte_t pte)
  19 {
  20         return __pmd(pte_val(pte));
  21 }
  22
  23 #define pmd_wrprotect(pmd)      pte_pmd(pte_wrprotect(pmd_pte(pmd)))
  24 #define pmd_mkwrite(pmd)        pte_pmd(pte_mkwrite(pmd_pte(pmd)))
  25 #define pmd_mkdirty(pmd)        pte_pmd(pte_mkdirty(pmd_pte(pmd)))
  26 #define pmd_mkold(pmd)          pte_pmd(pte_mkold(pmd_pte(pmd)))
  27 #define pmd_mkyoung(pmd)        pte_pmd(pte_mkyoung(pmd_pte(pmd)))
  28 #define pmd_mkhuge(pmd)         pte_pmd(pte_mkhuge(pmd_pte(pmd)))
  29 #define pmd_mkinvalid(pmd)      pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
  30 #define pmd_mkclean(pmd)        pte_pmd(pte_mkclean(pmd_pte(pmd)))
  31
  32 #define pmd_write(pmd)          pte_write(pmd_pte(pmd))
  33 #define pmd_young(pmd)          pte_young(pmd_pte(pmd))
  34 #define pmd_pfn(pmd)            pte_pfn(pmd_pte(pmd))
  35 #define pmd_dirty(pmd)          pte_dirty(pmd_pte(pmd))
  36
  37 #define mk_pmd(page, prot)      pte_pmd(mk_pte(page, prot))
  38
  39 #define pmd_trans_huge(pmd)     (pmd_val(pmd) & _PAGE_HW_SZ)
  40
  41 #define pfn_pmd(pfn, prot)      (__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
  42
  43 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
  44 {
  45         /*
  46          * open-coded pte_modify() with additional retaining of HW_SZ bit
  47          * so that pmd_trans_huge() remains true for this PMD
  48          */
  49         return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
  50 }
  51
  52 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
  53                               pmd_t *pmdp, pmd_t pmd)
  54 {
  55         *pmdp = pmd;
  56 }
  57
  58 extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
  59                                  pmd_t *pmd);
  60
  61 /* Generic variants assume pgtable_t is struct page *, hence need for these */
  62 #define __HAVE_ARCH_PGTABLE_DEPOSIT
  63 extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
  64                                        pgtable_t pgtable);
  65
  66 #define __HAVE_ARCH_PGTABLE_WITHDRAW
  67 extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
  68
  69 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
  70 extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
  71                                 unsigned long end);
  72
  73 /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
  74 #define pmdp_establish generic_pmdp_establish
  75
  76 #endif