/* * 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; } static 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: */