/* * Copyright 2003 PathScale Inc * Derived from include/asm-i386/pgtable.h * Licensed under the GPL */ #ifndef __UM_PGTABLE_3LEVEL_H#define __UM_PGTABLE_3LEVEL_H #include <asm-generic/pgtable-nopud.h> /* PGDIR_SHIFT determines what a third-level page table entry can map */ #define PGDIR_SHIFT	30#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)#define PGDIR_MASK	(~(PGDIR_SIZE-1)) /* PMD_SHIFT determines the size of the area a second-level page table can * map */ #define PMD_SHIFT	21#define PMD_SIZE	(1UL << PMD_SHIFT)#define PMD_MASK	(~(PMD_SIZE-1)) /* * entries per page directory level */ #define PTRS_PER_PTE 512#define PTRS_PER_PMD 512#define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)#define PTRS_PER_PGD 512#define FIRST_USER_ADDRESS	0 #define pte_ERROR(e) \        printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \	       pte_val(e))#define pmd_ERROR(e) \        printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \	       pmd_val(e))#define pgd_ERROR(e) \        printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \	       pgd_val(e)) #define pud_none(x)	(!(pud_val(x) & ~_PAGE_NEWPAGE))#define	pud_bad(x)	((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)#define pud_present(x)	(pud_val(x) & _PAGE_PRESENT)#define pud_populate(mm, pud, pmd) \	set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd))) #define set_pud(pudptr, pudval) set_64bit((phys_t *) (pudptr), pud_val(pudval))static inline int pgd_newpage(pgd_t pgd){	return(pgd_val(pgd) & _PAGE_NEWPAGE);} static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; } #define set_pmd(pmdptr, pmdval) set_64bit((phys_t *) (pmdptr), pmd_val(pmdval)) static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address){        pmd_t *pmd = (pmd_t *) __get_free_page(GFP_KERNEL);         if(pmd)                memset(pmd, 0, PAGE_SIZE);         return pmd;} extern inline void pud_clear (pud_t *pud){        set_pud(pud, __pud(0));} #define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)#define pud_page_vaddr(pud) \	((struct page *) __va(pud_val(pud) & PAGE_MASK)) /* Find an entry in the second-level page table.. */#define pmd_offset(pud, address) ((pmd_t *) pud_page_vaddr(*(pud)) + \			pmd_index(address)) static inline unsigned long pte_pfn(pte_t pte){	return phys_to_pfn(pte_val(pte));} static inline pte_t pfn_pte(pfn_t page_nr, pgprot_t pgprot){	pte_t pte;	phys_t phys = pfn_to_phys(page_nr); 	pte_set_val(pte, phys, pgprot);	return pte;} static inline pmd_t pfn_pmd(pfn_t page_nr, pgprot_t pgprot){	return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot));} /* * Bits 0 through 3 are taken in the low part of the pte, * put the 32 bits of offset into the high part. */#define PTE_FILE_MAX_BITS	32 #ifdef CONFIG_64BIT #define pte_to_pgoff(p) ((p).pte >> 32) #define pgoff_to_pte(off) ((pte_t) { ((off) << 32) | _PAGE_FILE }) #else #define pte_to_pgoff(pte) ((pte).pte_high) #define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) }) #endif #endif /* * Overrides for Emacs so that we follow Linus's tabbing style. * Emacs will notice this stuff at the end of the file and automatically * adjust the settings for this buffer only.  This must remain at the end * of the file. * --------------------------------------------------------------------------- * Local variables: * c-file-style: "linux" * End: */