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 #include <asm-generic/pgtable-nopmd.h> 15 16 static inline pte_t pmd_pte(pmd_t pmd) 17 { 18 return __pte(pmd_val(pmd)); 19 } 20 21 static inline pmd_t pte_pmd(pte_t pte) 22 { 23 return __pmd(pte_val(pte)); 24 } 25 26 #define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd))) 27 #define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd))) 28 #define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd))) 29 #define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd))) 30 #define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd))) 31 #define pmd_mkhuge(pmd) pte_pmd(pte_mkhuge(pmd_pte(pmd))) 32 #define pmd_mknotpresent(pmd) pte_pmd(pte_mknotpresent(pmd_pte(pmd))) 33 #define pmd_mksplitting(pmd) pte_pmd(pte_mkspecial(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 #define pmd_special(pmd) pte_special(pmd_pte(pmd)) 41 42 #define mk_pmd(page, prot) pte_pmd(mk_pte(page, prot)) 43 44 #define pmd_trans_huge(pmd) (pmd_val(pmd) & _PAGE_HW_SZ) 45 #define pmd_trans_splitting(pmd) (pmd_trans_huge(pmd) && pmd_special(pmd)) 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 has_transparent_hugepage() 1 68 69 /* Generic variants assume pgtable_t is struct page *, hence need for these */ 70 #define __HAVE_ARCH_PGTABLE_DEPOSIT 71 extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, 72 pgtable_t pgtable); 73 74 #define __HAVE_ARCH_PGTABLE_WITHDRAW 75 extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp); 76 77 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE 78 extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start, 79 unsigned long end); 80 81 #endif 82