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 #define __ARCH_USE_5LEVEL_HACK 15 #include <asm-generic/pgtable-nopmd.h> 16 17 static inline pte_t pmd_pte(pmd_t pmd) 18 { 19 return __pte(pmd_val(pmd)); 20 } 21 22 static inline pmd_t pte_pmd(pte_t pte) 23 { 24 return __pmd(pte_val(pte)); 25 } 26 27 #define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd))) 28 #define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd))) 29 #define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd))) 30 #define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd))) 31 #define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd))) 32 #define pmd_mkhuge(pmd) pte_pmd(pte_mkhuge(pmd_pte(pmd))) 33 #define pmd_mknotpresent(pmd) pte_pmd(pte_mknotpresent(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 41 #define mk_pmd(page, prot) pte_pmd(mk_pte(page, prot)) 42 43 #define pmd_trans_huge(pmd) (pmd_val(pmd) & _PAGE_HW_SZ) 44 45 #define pfn_pmd(pfn, prot) (__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))) 46 47 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) 48 { 49 /* 50 * open-coded pte_modify() with additional retaining of HW_SZ bit 51 * so that pmd_trans_huge() remains true for this PMD 52 */ 53 return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot)); 54 } 55 56 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, 57 pmd_t *pmdp, pmd_t pmd) 58 { 59 *pmdp = pmd; 60 } 61 62 extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr, 63 pmd_t *pmd); 64 65 /* Generic variants assume pgtable_t is struct page *, hence need for these */ 66 #define __HAVE_ARCH_PGTABLE_DEPOSIT 67 extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, 68 pgtable_t pgtable); 69 70 #define __HAVE_ARCH_PGTABLE_WITHDRAW 71 extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp); 72 73 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE 74 extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start, 75 unsigned long end); 76 77 /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/ 78 #define pmdp_establish generic_pmdp_establish 79 80 #endif 81