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_mknotpresent(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 77