hugetlb.h
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:5k
- #ifndef _LINUX_HUGETLB_H
- #define _LINUX_HUGETLB_H
- #ifdef CONFIG_HUGETLB_PAGE
- #include <linux/mempolicy.h>
- #include <asm/tlbflush.h>
- struct ctl_table;
- static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
- {
- return vma->vm_flags & VM_HUGETLB;
- }
- int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *);
- int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
- int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int);
- void zap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
- void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
- int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
- int hugetlb_report_meminfo(char *);
- int hugetlb_report_node_meminfo(int, char *);
- int is_hugepage_mem_enough(size_t);
- unsigned long hugetlb_total_pages(void);
- struct page *alloc_huge_page(void);
- void free_huge_page(struct page *);
- int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long address, int write_access);
- extern unsigned long max_huge_pages;
- extern const unsigned long hugetlb_zero, hugetlb_infinity;
- extern int sysctl_hugetlb_shm_group;
- /* arch callbacks */
- pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr);
- pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
- struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
- int write);
- struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
- pmd_t *pmd, int write);
- int is_aligned_hugepage_range(unsigned long addr, unsigned long len);
- int pmd_huge(pmd_t pmd);
- #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE
- #define is_hugepage_only_range(mm, addr, len) 0
- #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling)
- do { } while (0)
- #endif
- #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE
- #define prepare_hugepage_range(addr, len)
- is_aligned_hugepage_range(addr, len)
- #else
- int prepare_hugepage_range(unsigned long addr, unsigned long len);
- #endif
- #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE
- #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte)
- #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep)
- #else
- void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pte);
- pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep);
- #endif
- #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK
- #define hugetlb_prefault_arch_hook(mm) do { } while (0)
- #else
- void hugetlb_prefault_arch_hook(struct mm_struct *mm);
- #endif
- #else /* !CONFIG_HUGETLB_PAGE */
- static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
- {
- return 0;
- }
- static inline unsigned long hugetlb_total_pages(void)
- {
- return 0;
- }
- #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; })
- #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
- #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
- #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
- #define zap_hugepage_range(vma, start, len) BUG()
- #define unmap_hugepage_range(vma, start, end) BUG()
- #define is_hugepage_mem_enough(size) 0
- #define hugetlb_report_meminfo(buf) 0
- #define hugetlb_report_node_meminfo(n, buf) 0
- #define follow_huge_pmd(mm, addr, pmd, write) NULL
- #define is_aligned_hugepage_range(addr, len) 0
- #define prepare_hugepage_range(addr, len) (-EINVAL)
- #define pmd_huge(x) 0
- #define is_hugepage_only_range(mm, addr, len) 0
- #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling)
- do { } while (0)
- #define alloc_huge_page() ({ NULL; })
- #define free_huge_page(p) ({ (void)(p); BUG(); })
- #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; })
- #ifndef HPAGE_MASK
- #define HPAGE_MASK 0 /* Keep the compiler happy */
- #define HPAGE_SIZE 0
- #endif
- #endif /* !CONFIG_HUGETLB_PAGE */
- #ifdef CONFIG_HUGETLBFS
- struct hugetlbfs_config {
- uid_t uid;
- gid_t gid;
- umode_t mode;
- long nr_blocks;
- long nr_inodes;
- };
- struct hugetlbfs_sb_info {
- long max_blocks; /* blocks allowed */
- long free_blocks; /* blocks free */
- long max_inodes; /* inodes allowed */
- long free_inodes; /* inodes free */
- spinlock_t stat_lock;
- };
- struct hugetlbfs_inode_info {
- struct shared_policy policy;
- struct inode vfs_inode;
- };
- static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
- {
- return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
- }
- static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
- {
- return sb->s_fs_info;
- }
- extern struct file_operations hugetlbfs_file_operations;
- extern struct vm_operations_struct hugetlb_vm_ops;
- struct file *hugetlb_zero_setup(size_t);
- int hugetlb_get_quota(struct address_space *mapping);
- void hugetlb_put_quota(struct address_space *mapping);
- static inline int is_file_hugepages(struct file *file)
- {
- return file->f_op == &hugetlbfs_file_operations;
- }
- static inline void set_file_hugepages(struct file *file)
- {
- file->f_op = &hugetlbfs_file_operations;
- }
- #else /* !CONFIG_HUGETLBFS */
- #define is_file_hugepages(file) 0
- #define set_file_hugepages(file) BUG()
- #define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS)
- #endif /* !CONFIG_HUGETLBFS */
- #endif /* _LINUX_HUGETLB_H */