| /* |
| * 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)) |
| |
| struct mm_struct; |
| extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address); |
| |
| static inline void pud_clear (pud_t *pud) |
| { |
| set_pud(pud, __pud(_PAGE_NEWPAGE)); |
| } |
| |
| #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: |
| */ |