root/arch/arc/include/asm/hugepage.h

INCLUDED FROM

DEFINITIONS

1. pmd_pte
2. pte_pmd
3. pmd_modify
4. set_pmd_at

   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 #define __ARCH_USE_5LEVEL_HACK
  12 #include <asm-generic/pgtable-nopmd.h>
  13 
  14 static inline pte_t pmd_pte(pmd_t pmd)
  15 {
  16         return __pte(pmd_val(pmd));
  17 }
  18 
  19 static inline pmd_t pte_pmd(pte_t pte)
  20 {
  21         return __pmd(pte_val(pte));
  22 }
  23 
  24 #define pmd_wrprotect(pmd)      pte_pmd(pte_wrprotect(pmd_pte(pmd)))
  25 #define pmd_mkwrite(pmd)        pte_pmd(pte_mkwrite(pmd_pte(pmd)))
  26 #define pmd_mkdirty(pmd)        pte_pmd(pte_mkdirty(pmd_pte(pmd)))
  27 #define pmd_mkold(pmd)          pte_pmd(pte_mkold(pmd_pte(pmd)))
  28 #define pmd_mkyoung(pmd)        pte_pmd(pte_mkyoung(pmd_pte(pmd)))
  29 #define pmd_mkhuge(pmd)         pte_pmd(pte_mkhuge(pmd_pte(pmd)))
  30 #define pmd_mknotpresent(pmd)   pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
  31 #define pmd_mkclean(pmd)        pte_pmd(pte_mkclean(pmd_pte(pmd)))
  32 
  33 #define pmd_write(pmd)          pte_write(pmd_pte(pmd))
  34 #define pmd_young(pmd)          pte_young(pmd_pte(pmd))
  35 #define pmd_pfn(pmd)            pte_pfn(pmd_pte(pmd))
  36 #define pmd_dirty(pmd)          pte_dirty(pmd_pte(pmd))
  37 
  38 #define mk_pmd(page, prot)      pte_pmd(mk_pte(page, prot))
  39 
  40 #define pmd_trans_huge(pmd)     (pmd_val(pmd) & _PAGE_HW_SZ)
  41 
  42 #define pfn_pmd(pfn, prot)      (__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
  43 
  44 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
  45 {
  46         /*
  47          * open-coded pte_modify() with additional retaining of HW_SZ bit
  48          * so that pmd_trans_huge() remains true for this PMD
  49          */
  50         return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
  51 }
  52 
  53 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
  54                               pmd_t *pmdp, pmd_t pmd)
  55 {
  56         *pmdp = pmd;
  57 }
  58 
  59 extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
  60                                  pmd_t *pmd);
  61 
  62 /* Generic variants assume pgtable_t is struct page *, hence need for these */
  63 #define __HAVE_ARCH_PGTABLE_DEPOSIT
  64 extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
  65                                        pgtable_t pgtable);
  66 
  67 #define __HAVE_ARCH_PGTABLE_WITHDRAW
  68 extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
  69 
  70 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
  71 extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
  72                                 unsigned long end);
  73 
  74 /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
  75 #define pmdp_establish generic_pmdp_establish
  76 
  77 #endif