| Vineet Gupta | fe6c1b8 | 2014-07-08 18:43:47 +0530 | [diff] [blame^] | 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 | #endif |