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 /*
  14  * Hugetlb definitions.
  15  */
  16 #define HPAGE_SHIFT             PMD_SHIFT
  17 #define HPAGE_SIZE              (_AC(1, UL) << HPAGE_SHIFT)
  18 #define HPAGE_MASK              (~(HPAGE_SIZE - 1))
  19
  20 static inline pte_t pmd_pte(pmd_t pmd)
  21 {
  22         return __pte(pmd_val(pmd));
  23 }
  24
  25 static inline pmd_t pte_pmd(pte_t pte)
  26 {
  27         return __pmd(pte_val(pte));
  28 }
  29
  30 #define pmd_wrprotect(pmd)      pte_pmd(pte_wrprotect(pmd_pte(pmd)))
  31 #define pmd_mkwrite_novma(pmd)  pte_pmd(pte_mkwrite_novma(pmd_pte(pmd)))
  32 #define pmd_mkdirty(pmd)        pte_pmd(pte_mkdirty(pmd_pte(pmd)))
  33 #define pmd_mkold(pmd)          pte_pmd(pte_mkold(pmd_pte(pmd)))
  34 #define pmd_mkyoung(pmd)        pte_pmd(pte_mkyoung(pmd_pte(pmd)))
  35 #define pmd_mkhuge(pmd)         pte_pmd(pte_mkhuge(pmd_pte(pmd)))
  36 #define pmd_mkinvalid(pmd)      pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
  37 #define pmd_mkclean(pmd)        pte_pmd(pte_mkclean(pmd_pte(pmd)))
  38
  39 #define pmd_write(pmd)          pte_write(pmd_pte(pmd))
  40 #define pmd_young(pmd)          pte_young(pmd_pte(pmd))
  41 #define pmd_dirty(pmd)          pte_dirty(pmd_pte(pmd))
  42
  43 #define mk_pmd(page, prot)      pte_pmd(mk_pte(page, prot))
  44
  45 #define pmd_trans_huge(pmd)     (pmd_val(pmd) & _PAGE_HW_SZ)
  46
  47 #define pfn_pmd(pfn, prot)      (__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
  48
  49 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
  50 {
  51         /*
  52          * open-coded pte_modify() with additional retaining of HW_SZ bit
  53          * so that pmd_trans_huge() remains true for this PMD
  54          */
  55         return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
  56 }
  57
  58 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
  59                               pmd_t *pmdp, pmd_t pmd)
  60 {
  61         *pmdp = pmd;
  62 }
  63
  64 extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
  65                                  pmd_t *pmd);
  66
  67 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
  68 extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
  69                                 unsigned long end);
  70
  71 /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
  72 #define pmdp_establish generic_pmdp_establish
  73
  74 #endif