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#ifndef _I386_PGTABLE_3LEVEL_H #define _I386_PGTABLE_3LEVEL_H #include <asm-generic/pgtable-nopud.h> /* * Intel Physical Address Extension (PAE) Mode - three-level page * tables on PPro+ CPUs. * * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com> */ #define pte_ERROR(e) \ printk("%s:%d: bad pte %p(%08lx%08lx).\n", __FILE__, __LINE__, &(e), (e).pte_high, (e).pte_low) #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(pud) 0 #define pud_bad(pud) 0 #define pud_present(pud) 1 /* * Is the pte executable? */ static inline int pte_x(pte_t pte) { return !(pte_val(pte) & _PAGE_NX); } /* * All present user-pages with !NX bit are user-executable: */ static inline int pte_exec(pte_t pte) { return pte_user(pte) && pte_x(pte); } /* * All present pages with !NX bit are kernel-executable: */ static inline int pte_exec_kernel(pte_t pte) { return pte_x(pte); } /* Rules for using set_pte: the pte being assigned *must* be * either not present or in a state where the hardware will * not attempt to update the pte. In places where this is * not possible, use pte_get_and_clear to obtain the old pte * value and then use set_pte to update it. -ben */ static inline void set_pte(pte_t *ptep, pte_t pte) { ptep->pte_high = pte.pte_high; smp_wmb(); ptep->pte_low = pte.pte_low; } #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) #define __HAVE_ARCH_SET_PTE_ATOMIC #define set_pte_atomic(pteptr,pteval) \ set_64bit((unsigned long long *)(pteptr),pte_val(pteval)) #define set_pmd(pmdptr,pmdval) \ set_64bit((unsigned long long *)(pmdptr),pmd_val(pmdval)) #define set_pud(pudptr,pudval) \ (*(pudptr) = (pudval)) /* * Pentium-II erratum A13: in PAE mode we explicitly have to flush * the TLB via cr3 if the top-level pgd is changed... * We do not let the generic code free and clear pgd entries due to * this erratum. */ static inline void pud_clear (pud_t * pud) { } #define pud_page(pud) \ ((struct page *) __va(pud_val(pud) & PAGE_MASK)) #define pud_page_kernel(pud) \ ((unsigned long) __va(pud_val(pud) & PAGE_MASK)) /* Find an entry in the second-level page table.. */ #define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \ pmd_index(address)) static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { pte_t res; /* xchg acts as a barrier before the setting of the high bits */ res.pte_low = xchg(&ptep->pte_low, 0); res.pte_high = ptep->pte_high; ptep->pte_high = 0; return res; } static inline int pte_same(pte_t a, pte_t b) { return a.pte_low == b.pte_low && a.pte_high == b.pte_high; } #define pte_page(x) pfn_to_page(pte_pfn(x)) static inline int pte_none(pte_t pte) { return !pte.pte_low && !pte.pte_high; } static inline unsigned long pte_pfn(pte_t pte) { return (pte.pte_low >> PAGE_SHIFT) | (pte.pte_high << (32 - PAGE_SHIFT)); } extern unsigned long long __supported_pte_mask; static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) { pte_t pte; pte.pte_high = (page_nr >> (32 - PAGE_SHIFT)) | \ (pgprot_val(pgprot) >> 32); pte.pte_high &= (__supported_pte_mask >> 32); pte.pte_low = ((page_nr << PAGE_SHIFT) | pgprot_val(pgprot)) & \ __supported_pte_mask; return pte; } static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) { return __pmd((((unsigned long long)page_nr << PAGE_SHIFT) | \ pgprot_val(pgprot)) & __supported_pte_mask); } /* * Bits 0, 6 and 7 are taken in the low part of the pte, * put the 32 bits of offset into the high part. */ #define pte_to_pgoff(pte) ((pte).pte_high) #define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) }) #define PTE_FILE_MAX_BITS 32 /* Encode and de-code a swap entry */ #define __swp_type(x) (((x).val) & 0x1f) #define __swp_offset(x) ((x).val >> 5) #define __swp_entry(type, offset) ((swp_entry_t){(type) | (offset) << 5}) #define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high }) #define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val }) #define __pmd_free_tlb(tlb, x) do { } while (0) #endif /* _I386_PGTABLE_3LEVEL_H */