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/* * 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> static inline int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, unsigned long len) { return 0; } #define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE 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; } #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR 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; } #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { /* * clear the huge pte entry firstly, so that the other smp threads will * not get old pte entry after finishing flush_tlb_page and before * setting new huge pte entry */ huge_ptep_get_and_clear(vma->vm_mm, addr, ptep); flush_tlb_page(vma, addr); } #define __HAVE_ARCH_HUGE_PTE_NONE 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); } #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS 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 void arch_clear_hugepage_flags(struct page *page) { } #include <asm-generic/hugetlb.h> #endif /* __ASM_HUGETLB_H */
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