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