| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 2008, 2009 Cavium Networks, Inc. |
| */ |
| |
| #ifndef __ASM_HUGETLB_H |
| #define __ASM_HUGETLB_H |
| |
| #include <asm/page.h> |
| #include <asm-generic/hugetlb.h> |
| |
| |
| static inline int is_hugepage_only_range(struct mm_struct *mm, |
| unsigned long addr, |
| unsigned long len) |
| { |
| return 0; |
| } |
| |
| static inline int prepare_hugepage_range(struct file *file, |
| unsigned long addr, |
| unsigned long len) |
| { |
| unsigned long task_size = STACK_TOP; |
| struct hstate *h = hstate_file(file); |
| |
| if (len & ~huge_page_mask(h)) |
| return -EINVAL; |
| if (addr & ~huge_page_mask(h)) |
| return -EINVAL; |
| if (len > task_size) |
| return -ENOMEM; |
| if (task_size - len < addr) |
| return -EINVAL; |
| return 0; |
| } |
| |
| static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) |
| { |
| } |
| |
| static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, |
| unsigned long addr, |
| unsigned long end, |
| unsigned long floor, |
| unsigned long ceiling) |
| { |
| free_pgd_range(tlb, addr, end, floor, ceiling); |
| } |
| |
| static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep, pte_t pte) |
| { |
| set_pte_at(mm, addr, ptep, pte); |
| } |
| |
| static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, |
| unsigned long addr, pte_t *ptep) |
| { |
| pte_t clear; |
| pte_t pte = *ptep; |
| |
| pte_val(clear) = (unsigned long)invalid_pte_table; |
| set_pte_at(mm, addr, ptep, clear); |
| return pte; |
| } |
| |
| static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, |
| unsigned long addr, pte_t *ptep) |
| { |
| flush_tlb_page(vma, addr & huge_page_mask(hstate_vma(vma))); |
| } |
| |
| static inline int huge_pte_none(pte_t pte) |
| { |
| unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL; |
| return !val || (val == (unsigned long)invalid_pte_table); |
| } |
| |
| static inline pte_t huge_pte_wrprotect(pte_t pte) |
| { |
| return pte_wrprotect(pte); |
| } |
| |
| static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, |
| unsigned long addr, pte_t *ptep) |
| { |
| ptep_set_wrprotect(mm, addr, ptep); |
| } |
| |
| static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, |
| unsigned long addr, |
| pte_t *ptep, pte_t pte, |
| int dirty) |
| { |
| int changed = !pte_same(*ptep, pte); |
| |
| if (changed) { |
| set_pte_at(vma->vm_mm, addr, ptep, pte); |
| /* |
| * There could be some standard sized pages in there, |
| * get them all. |
| */ |
| flush_tlb_range(vma, addr, addr + HPAGE_SIZE); |
| } |
| return changed; |
| } |
| |
| static inline pte_t huge_ptep_get(pte_t *ptep) |
| { |
| return *ptep; |
| } |
| |
| static inline int arch_prepare_hugepage(struct page *page) |
| { |
| return 0; |
| } |
| |
| static inline void arch_release_hugepage(struct page *page) |
| { |
| } |
| |
| static inline void arch_clear_hugepage_flags(struct page *page) |
| { |
| } |
| |
| #endif /* __ASM_HUGETLB_H */ |
