Subversion Repositories Kolibri OS

#ifndef _ASM_X86_PGTABLE_H

#define _ASM_X86_PGTABLE_H

#include 

#include 

#include 

/*

 * Macro to mark a page protection value as UC-

 */

#define pgprot_noncached(prot)						\

	((boot_cpu_data.x86 > 3)					\

	 ? (__pgprot(pgprot_val(prot) |					\

		     cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS)))	\

	 : (prot))

#ifndef __ASSEMBLY__

#include 

void ptdump_walk_pgd_level(struct seq_file *m, pgd_t *pgd);

/*

 * ZERO_PAGE is a global shared page that is always zero: used

 * for zero-mapped memory areas etc..

 */

extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]

	__visible;

#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))

extern spinlock_t pgd_lock;

extern struct list_head pgd_list;

extern struct mm_struct *pgd_page_get_mm(struct page *page);

#ifdef CONFIG_PARAVIRT

#include 

#else  /* !CONFIG_PARAVIRT */

#define set_pte(ptep, pte)		native_set_pte(ptep, pte)

#define set_pte_at(mm, addr, ptep, pte)	native_set_pte_at(mm, addr, ptep, pte)

#define set_pmd_at(mm, addr, pmdp, pmd)	native_set_pmd_at(mm, addr, pmdp, pmd)

#define set_pte_atomic(ptep, pte)					\

	native_set_pte_atomic(ptep, pte)

#define set_pmd(pmdp, pmd)		native_set_pmd(pmdp, pmd)

#ifndef __PAGETABLE_PUD_FOLDED

#define set_pgd(pgdp, pgd)		native_set_pgd(pgdp, pgd)

#define pgd_clear(pgd)			native_pgd_clear(pgd)

#endif

#ifndef set_pud

# define set_pud(pudp, pud)		native_set_pud(pudp, pud)

#endif

#ifndef __PAGETABLE_PMD_FOLDED

#define pud_clear(pud)			native_pud_clear(pud)

#endif

#define pte_clear(mm, addr, ptep)	native_pte_clear(mm, addr, ptep)

#define pmd_clear(pmd)			native_pmd_clear(pmd)

#define pte_update(mm, addr, ptep)              do { } while (0)

#define pte_update_defer(mm, addr, ptep)        do { } while (0)

#define pmd_update(mm, addr, ptep)              do { } while (0)

#define pmd_update_defer(mm, addr, ptep)        do { } while (0)

#define pgd_val(x)	native_pgd_val(x)

#define __pgd(x)	native_make_pgd(x)

#ifndef __PAGETABLE_PUD_FOLDED

#define pud_val(x)	native_pud_val(x)

#define __pud(x)	native_make_pud(x)

#endif

#ifndef __PAGETABLE_PMD_FOLDED

#define pmd_val(x)	native_pmd_val(x)

#define __pmd(x)	native_make_pmd(x)

#endif

#define pte_val(x)	native_pte_val(x)

#define __pte(x)	native_make_pte(x)

#define arch_end_context_switch(prev)	do {} while(0)

#endif	/* CONFIG_PARAVIRT */

/*

 * The following only work if pte_present() is true.

 * Undefined behaviour if not..

 */

static inline int pte_dirty(pte_t pte)

{

	return pte_flags(pte) & _PAGE_DIRTY;

}

static inline int pte_young(pte_t pte)

{

	return pte_flags(pte) & _PAGE_ACCESSED;

}

static inline int pmd_dirty(pmd_t pmd)

{

	return pmd_flags(pmd) & _PAGE_DIRTY;

}

static inline int pmd_young(pmd_t pmd)

{

	return pmd_flags(pmd) & _PAGE_ACCESSED;

}

static inline int pte_write(pte_t pte)

{

	return pte_flags(pte) & _PAGE_RW;

}

static inline int pte_file(pte_t pte)

{

	return pte_flags(pte) & _PAGE_FILE;

}

static inline int pte_huge(pte_t pte)

{

	return pte_flags(pte) & _PAGE_PSE;

}

static inline int pte_global(pte_t pte)

{

	return pte_flags(pte) & _PAGE_GLOBAL;

}

static inline int pte_exec(pte_t pte)

{

	return !(pte_flags(pte) & _PAGE_NX);

}

static inline int pte_special(pte_t pte)

{

	/*

	 * See CONFIG_NUMA_BALANCING pte_numa in include/asm-generic/pgtable.h.

	 * On x86 we have _PAGE_BIT_NUMA == _PAGE_BIT_GLOBAL+1 ==

	 * __PAGE_BIT_SOFTW1 == _PAGE_BIT_SPECIAL.

	 */

	return (pte_flags(pte) & _PAGE_SPECIAL) &&

		(pte_flags(pte) & (_PAGE_PRESENT|_PAGE_PROTNONE));

}

static inline unsigned long pte_pfn(pte_t pte)

{

	return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT;

}

static inline unsigned long pmd_pfn(pmd_t pmd)

{

	return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT;

}

static inline unsigned long pud_pfn(pud_t pud)

{

	return (pud_val(pud) & PTE_PFN_MASK) >> PAGE_SHIFT;

}

#define pte_page(pte)	pfn_to_page(pte_pfn(pte))

static inline int pmd_large(pmd_t pte)

{

	return pmd_flags(pte) & _PAGE_PSE;

}

#ifdef CONFIG_TRANSPARENT_HUGEPAGE

static inline int pmd_trans_splitting(pmd_t pmd)

{

	return pmd_val(pmd) & _PAGE_SPLITTING;

}

static inline int pmd_trans_huge(pmd_t pmd)

{

	return pmd_val(pmd) & _PAGE_PSE;

}

static inline int has_transparent_hugepage(void)

{

	return cpu_has_pse;

}

#endif /* CONFIG_TRANSPARENT_HUGEPAGE */

static inline pte_t pte_set_flags(pte_t pte, pteval_t set)

{

	pteval_t v = native_pte_val(pte);

	return native_make_pte(v | set);

}

static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear)

{

	pteval_t v = native_pte_val(pte);

	return native_make_pte(v & ~clear);

}

static inline pte_t pte_mkclean(pte_t pte)

{

	return pte_clear_flags(pte, _PAGE_DIRTY);

}

static inline pte_t pte_mkold(pte_t pte)

{

	return pte_clear_flags(pte, _PAGE_ACCESSED);

}

static inline pte_t pte_wrprotect(pte_t pte)

{

	return pte_clear_flags(pte, _PAGE_RW);

}

static inline pte_t pte_mkexec(pte_t pte)

{

	return pte_clear_flags(pte, _PAGE_NX);

}

static inline pte_t pte_mkdirty(pte_t pte)

{

	return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);

}

static inline pte_t pte_mkyoung(pte_t pte)

{

	return pte_set_flags(pte, _PAGE_ACCESSED);

}

static inline pte_t pte_mkwrite(pte_t pte)

{

	return pte_set_flags(pte, _PAGE_RW);

}

static inline pte_t pte_mkhuge(pte_t pte)

{

	return pte_set_flags(pte, _PAGE_PSE);

}

static inline pte_t pte_clrhuge(pte_t pte)

{

	return pte_clear_flags(pte, _PAGE_PSE);

}

static inline pte_t pte_mkglobal(pte_t pte)

{

	return pte_set_flags(pte, _PAGE_GLOBAL);

}

static inline pte_t pte_clrglobal(pte_t pte)

{

	return pte_clear_flags(pte, _PAGE_GLOBAL);

}

static inline pte_t pte_mkspecial(pte_t pte)

{

	return pte_set_flags(pte, _PAGE_SPECIAL);

}

static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set)

{

	pmdval_t v = native_pmd_val(pmd);

	return __pmd(v | set);

}

static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear)

{

	pmdval_t v = native_pmd_val(pmd);

	return __pmd(v & ~clear);

}

static inline pmd_t pmd_mkold(pmd_t pmd)

{

	return pmd_clear_flags(pmd, _PAGE_ACCESSED);

}

static inline pmd_t pmd_wrprotect(pmd_t pmd)

{

	return pmd_clear_flags(pmd, _PAGE_RW);

}

static inline pmd_t pmd_mkdirty(pmd_t pmd)

{

	return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY);

}

static inline pmd_t pmd_mkhuge(pmd_t pmd)

{

	return pmd_set_flags(pmd, _PAGE_PSE);

}

static inline pmd_t pmd_mkyoung(pmd_t pmd)

{

	return pmd_set_flags(pmd, _PAGE_ACCESSED);

}

static inline pmd_t pmd_mkwrite(pmd_t pmd)

{

	return pmd_set_flags(pmd, _PAGE_RW);

}

static inline pmd_t pmd_mknotpresent(pmd_t pmd)

{

	return pmd_clear_flags(pmd, _PAGE_PRESENT);

}

#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY

static inline int pte_soft_dirty(pte_t pte)

{

	return pte_flags(pte) & _PAGE_SOFT_DIRTY;

}

static inline int pmd_soft_dirty(pmd_t pmd)

{

	return pmd_flags(pmd) & _PAGE_SOFT_DIRTY;

}

static inline pte_t pte_mksoft_dirty(pte_t pte)

{

	return pte_set_flags(pte, _PAGE_SOFT_DIRTY);

}

static inline pmd_t pmd_mksoft_dirty(pmd_t pmd)

{

	return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY);

}

static inline pte_t pte_file_clear_soft_dirty(pte_t pte)

{

	return pte_clear_flags(pte, _PAGE_SOFT_DIRTY);

}

static inline pte_t pte_file_mksoft_dirty(pte_t pte)

{

	return pte_set_flags(pte, _PAGE_SOFT_DIRTY);

}

static inline int pte_file_soft_dirty(pte_t pte)

{

	return pte_flags(pte) & _PAGE_SOFT_DIRTY;

}

#endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */

/*

 * Mask out unsupported bits in a present pgprot.  Non-present pgprots

 * can use those bits for other purposes, so leave them be.

 */

static inline pgprotval_t massage_pgprot(pgprot_t pgprot)

{

	pgprotval_t protval = pgprot_val(pgprot);

	if (protval & _PAGE_PRESENT)

		protval &= __supported_pte_mask;

	return protval;

}

static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)

{

	return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) |

		     massage_pgprot(pgprot));

}

static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)

{

	return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) |

		     massage_pgprot(pgprot));

}

static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)

{

	pteval_t val = pte_val(pte);

	/*

	 * Chop off the NX bit (if present), and add the NX portion of

	 * the newprot (if present):

	 */

	val &= _PAGE_CHG_MASK;

	val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK;

	return __pte(val);

}

static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)

{

	pmdval_t val = pmd_val(pmd);

	val &= _HPAGE_CHG_MASK;

	val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK;

	return __pmd(val);

}

/* mprotect needs to preserve PAT bits when updating vm_page_prot */

#define pgprot_modify pgprot_modify

static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)

{

	pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK;

	pgprotval_t addbits = pgprot_val(newprot);

	return __pgprot(preservebits | addbits);

}

#define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK)

#define canon_pgprot(p) __pgprot(massage_pgprot(p))

static inline int is_new_memtype_allowed(u64 paddr, unsigned long size,

					 enum page_cache_mode pcm,

					 enum page_cache_mode new_pcm)

{

	/*

	 * PAT type is always WB for untracked ranges, so no need to check.

	 */

	if (x86_platform.is_untracked_pat_range(paddr, paddr + size))

		return 1;

	/*

	 * Certain new memtypes are not allowed with certain

	 * requested memtype:

	 * - request is uncached, return cannot be write-back

	 * - request is write-combine, return cannot be write-back

	 */

	if ((pcm == _PAGE_CACHE_MODE_UC_MINUS &&

	     new_pcm == _PAGE_CACHE_MODE_WB) ||

	    (pcm == _PAGE_CACHE_MODE_WC &&

	     new_pcm == _PAGE_CACHE_MODE_WB)) {

		return 0;

	}

	return 1;

}

pmd_t *populate_extra_pmd(unsigned long vaddr);

pte_t *populate_extra_pte(unsigned long vaddr);

#endif	/* __ASSEMBLY__ */

#ifdef CONFIG_X86_32

# include 

#else

# include 

#endif

#ifndef __ASSEMBLY__

//#include 

#include 

#include 

static inline int pte_none(pte_t pte)

{

	return !pte.pte;

}

#define __HAVE_ARCH_PTE_SAME

static inline int pte_same(pte_t a, pte_t b)

{

	return a.pte == b.pte;

}

static inline int pte_present(pte_t a)

{

	return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE |

			       _PAGE_NUMA);

}

#define pte_present_nonuma pte_present_nonuma

static inline int pte_present_nonuma(pte_t a)

{

	return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE);

}

#define pte_accessible pte_accessible

static inline bool pte_accessible(struct mm_struct *mm, pte_t a)

{

	if (pte_flags(a) & _PAGE_PRESENT)

		return true;

	if ((pte_flags(a) & (_PAGE_PROTNONE | _PAGE_NUMA)) &&

			mm_tlb_flush_pending(mm))

		return true;

	return false;

}

static inline int pte_hidden(pte_t pte)

{

	return pte_flags(pte) & _PAGE_HIDDEN;

}

static inline int pmd_present(pmd_t pmd)

{

	/*

	 * Checking for _PAGE_PSE is needed too because

	 * split_huge_page will temporarily clear the present bit (but

	 * the _PAGE_PSE flag will remain set at all times while the

	 * _PAGE_PRESENT bit is clear).

	 */

	return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE |

				 _PAGE_NUMA);

}

static inline int pmd_none(pmd_t pmd)

{

	/* Only check low word on 32-bit platforms, since it might be

	   out of sync with upper half. */

	return (unsigned long)native_pmd_val(pmd) == 0;

}

static inline unsigned long pmd_page_vaddr(pmd_t pmd)

{

	return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK);

}

/*

 * Currently stuck as a macro due to indirect forward reference to

 * linux/mmzone.h's __section_mem_map_addr() definition:

 */

#define pmd_page(pmd)	pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT)

/*

 * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]

 *

 * this macro returns the index of the entry in the pmd page which would

 * control the given virtual address

 */

static inline unsigned long pmd_index(unsigned long address)

{

	return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);

}

/*

 * Conversion functions: convert a page and protection to a page entry,

 * and a page entry and page directory to the page they refer to.

 *

 * (Currently stuck as a macro because of indirect forward reference

 * to linux/mm.h:page_to_nid())

 */

#define mk_pte(page, pgprot)   pfn_pte(page_to_pfn(page), (pgprot))

/*

 * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]

 *

 * this function returns the index of the entry in the pte page which would

 * control the given virtual address

 */

static inline unsigned long pte_index(unsigned long address)

{

	return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);

}

static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)

{

	return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);

}

static inline int pmd_bad(pmd_t pmd)

{

#ifdef CONFIG_NUMA_BALANCING

	/* pmd_numa check */

	if ((pmd_flags(pmd) & (_PAGE_NUMA|_PAGE_PRESENT)) == _PAGE_NUMA)

		return 0;

#endif

	return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE;

}

static inline unsigned long pages_to_mb(unsigned long npg)

{

	return npg >> (20 - PAGE_SHIFT);

}

#if PAGETABLE_LEVELS > 2

static inline int pud_none(pud_t pud)

{

	return native_pud_val(pud) == 0;

}

static inline int pud_present(pud_t pud)

{

	return pud_flags(pud) & _PAGE_PRESENT;

}

static inline unsigned long pud_page_vaddr(pud_t pud)

{

	return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK);

}

/*

 * Currently stuck as a macro due to indirect forward reference to

 * linux/mmzone.h's __section_mem_map_addr() definition:

 */

#define pud_page(pud)		pfn_to_page(pud_val(pud) >> PAGE_SHIFT)

/* Find an entry in the second-level page table.. */

static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)

{

	return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);

}

static inline int pud_large(pud_t pud)

{

	return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) ==

		(_PAGE_PSE | _PAGE_PRESENT);

}

static inline int pud_bad(pud_t pud)

{

	return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0;

}

#else

static inline int pud_large(pud_t pud)

{

	return 0;

}

#endif	/* PAGETABLE_LEVELS > 2 */

#if PAGETABLE_LEVELS > 3

static inline int pgd_present(pgd_t pgd)

{

	return pgd_flags(pgd) & _PAGE_PRESENT;

}

static inline unsigned long pgd_page_vaddr(pgd_t pgd)

{

	return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK);

}

/*

 * Currently stuck as a macro due to indirect forward reference to

 * linux/mmzone.h's __section_mem_map_addr() definition:

 */

#define pgd_page(pgd)		pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)

/* to find an entry in a page-table-directory. */

static inline unsigned long pud_index(unsigned long address)

{

	return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1);

}

static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)

{

	return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address);

}

static inline int pgd_bad(pgd_t pgd)

{

	return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE;

}

static inline int pgd_none(pgd_t pgd)

{

	return !native_pgd_val(pgd);

}

#endif	/* PAGETABLE_LEVELS > 3 */

#endif	/* __ASSEMBLY__ */

/*

 * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]

 *

 * this macro returns the index of the entry in the pgd page which would

 * control the given virtual address

 */

#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))

/*

 * pgd_offset() returns a (pgd_t *)

 * pgd_index() is used get the offset into the pgd page's array of pgd_t's;

 */

#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))

/*

 * a shortcut which implies the use of the kernel's pgd, instead

 * of a process's

 */

#define pgd_offset_k(address) pgd_offset(&init_mm, (address))

#define KERNEL_PGD_BOUNDARY	pgd_index(PAGE_OFFSET)

#define KERNEL_PGD_PTRS		(PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)

#ifndef __ASSEMBLY__

extern int direct_gbpages;

void init_mem_mapping(void);

void early_alloc_pgt_buf(void);

/* local pte updates need not use xchg for locking */

static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)

{

	pte_t res = *ptep;

	/* Pure native function needs no input for mm, addr */

	native_pte_clear(NULL, 0, ptep);

	return res;

}

static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp)

{

	pmd_t res = *pmdp;

	native_pmd_clear(pmdp);

	return res;

}

static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,

				     pte_t *ptep , pte_t pte)

{

	native_set_pte(ptep, pte);

}

static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr,

				     pmd_t *pmdp , pmd_t pmd)

{

	native_set_pmd(pmdp, pmd);

}

#ifndef CONFIG_PARAVIRT

/*

 * Rules for using pte_update - it must be called after any PTE update which

 * has not been done using the set_pte / clear_pte interfaces.  It is used by

 * shadow mode hypervisors to resynchronize the shadow page tables.  Kernel PTE

 * updates should either be sets, clears, or set_pte_atomic for P->P

 * transitions, which means this hook should only be called for user PTEs.

 * This hook implies a P->P protection or access change has taken place, which

 * requires a subsequent TLB flush.  The notification can optionally be delayed

 * until the TLB flush event by using the pte_update_defer form of the

 * interface, but care must be taken to assure that the flush happens while

 * still holding the same page table lock so that the shadow and primary pages

 * do not become out of sync on SMP.

 */

#define pte_update(mm, addr, ptep)		do { } while (0)

#define pte_update_defer(mm, addr, ptep)	do { } while (0)

#endif

/*

 * We only update the dirty/accessed state if we set

 * the dirty bit by hand in the kernel, since the hardware

 * will do the accessed bit for us, and we don't want to

 * race with other CPU's that might be updating the dirty

 * bit at the same time.

 */

struct vm_area_struct;

#define  __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS

extern int ptep_set_access_flags(struct vm_area_struct *vma,

				 unsigned long address, pte_t *ptep,

				 pte_t entry, int dirty);

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG

extern int ptep_test_and_clear_young(struct vm_area_struct *vma,

				     unsigned long addr, pte_t *ptep);

#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH

extern int ptep_clear_flush_young(struct vm_area_struct *vma,

				  unsigned long address, pte_t *ptep);

#define __HAVE_ARCH_PTEP_GET_AND_CLEAR

static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,

				       pte_t *ptep)

{

	pte_t pte = native_ptep_get_and_clear(ptep);

	pte_update(mm, addr, ptep);

	return pte;

}

#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL

static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,

					    unsigned long addr, pte_t *ptep,

					    int full)

{

	pte_t pte;

	if (full) {

		/*

		 * Full address destruction in progress; paravirt does not

		 * care about updates and native needs no locking

		 */

		pte = native_local_ptep_get_and_clear(ptep);

	} else {

		pte = ptep_get_and_clear(mm, addr, ptep);

	}

	return pte;

}

#define __HAVE_ARCH_PTEP_SET_WRPROTECT

static inline void ptep_set_wrprotect(struct mm_struct *mm,

				      unsigned long addr, pte_t *ptep)

{

	clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);

	pte_update(mm, addr, ptep);

}

#define flush_tlb_fix_spurious_fault(vma, address) do { } while (0)

#define mk_pmd(page, pgprot)   pfn_pmd(page_to_pfn(page), (pgprot))

#define  __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS

extern int pmdp_set_access_flags(struct vm_area_struct *vma,

				 unsigned long address, pmd_t *pmdp,

				 pmd_t entry, int dirty);

#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG

extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,

				     unsigned long addr, pmd_t *pmdp);

#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH

extern int pmdp_clear_flush_young(struct vm_area_struct *vma,

				  unsigned long address, pmd_t *pmdp);

#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH

extern void pmdp_splitting_flush(struct vm_area_struct *vma,

				 unsigned long addr, pmd_t *pmdp);

#define __HAVE_ARCH_PMD_WRITE

static inline int pmd_write(pmd_t pmd)

{

	return pmd_flags(pmd) & _PAGE_RW;

}

#define __HAVE_ARCH_PMDP_GET_AND_CLEAR

static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr,

				       pmd_t *pmdp)

{

	pmd_t pmd = native_pmdp_get_and_clear(pmdp);

	pmd_update(mm, addr, pmdp);

	return pmd;

}

#define __HAVE_ARCH_PMDP_SET_WRPROTECT

static inline void pmdp_set_wrprotect(struct mm_struct *mm,

				      unsigned long addr, pmd_t *pmdp)

{

	clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp);

	pmd_update(mm, addr, pmdp);

}

/*

 * clone_pgd_range(pgd_t *dst, pgd_t *src, int count);

 *

 *  dst - pointer to pgd range anwhere on a pgd page

 *  src - ""

 *  count - the number of pgds to copy.

 *

 * dst and src can be on the same page, but the range must not overlap,

 * and must not cross a page boundary.

 */

static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)

{

       memcpy(dst, src, count * sizeof(pgd_t));

}

#define PTE_SHIFT ilog2(PTRS_PER_PTE)

static inline int page_level_shift(enum pg_level level)

{

	return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT;

}

static inline unsigned long page_level_size(enum pg_level level)

{

	return 1UL << page_level_shift(level);

}

static inline unsigned long page_level_mask(enum pg_level level)

{

	return ~(page_level_size(level) - 1);

}

/*

 * The x86 doesn't have any external MMU info: the kernel page

 * tables contain all the necessary information.

 */

static inline void update_mmu_cache(struct vm_area_struct *vma,

		unsigned long addr, pte_t *ptep)

{

}

static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,

		unsigned long addr, pmd_t *pmd)

{

}

#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY

static inline pte_t pte_swp_mksoft_dirty(pte_t pte)

{

	VM_BUG_ON(pte_present_nonuma(pte));

	return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY);

}

static inline int pte_swp_soft_dirty(pte_t pte)

{

	VM_BUG_ON(pte_present_nonuma(pte));

	return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY;

}

static inline pte_t pte_swp_clear_soft_dirty(pte_t pte)

{

	VM_BUG_ON(pte_present_nonuma(pte));

	return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY);

}

#endif

//#include 

#endif	/* __ASSEMBLY__ */

#endif /* _ASM_X86_PGTABLE_H */