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#ifndef _I386_PGTABLE_2LEVEL_H #define _I386_PGTABLE_2LEVEL_H #include <asm-generic/pgtable-nopmd.h> #define pte_ERROR(e) \ printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low) #define pgd_ERROR(e) \ printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) /* * Certain architectures need to do special things when PTEs * within a page table are directly modified. Thus, the following * hook is made available. */ #define set_pte(pteptr, pteval) (*(pteptr) = pteval) #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) #define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval) #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) #define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte_low, 0)) #define pte_same(a, b) ((a).pte_low == (b).pte_low) #define pte_page(x) pfn_to_page(pte_pfn(x)) #define pte_none(x) (!(x).pte_low) #define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT))) #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) /* * All present user pages are user-executable: */ static inline int pte_exec(pte_t pte) { return pte_user(pte); } /* * All present pages are kernel-executable: */ static inline int pte_exec_kernel(pte_t pte) { return 1; } /* * Bits 0, 6 and 7 are taken, split up the 29 bits of offset * into this range: */ #define PTE_FILE_MAX_BITS 29 #define pte_to_pgoff(pte) \ ((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 )) #define pgoff_to_pte(off) \ ((pte_t) { (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE }) /* Encode and de-code a swap entry */ #define __swp_type(x) (((x).val >> 1) & 0x1f) #define __swp_offset(x) ((x).val >> 8) #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) #endif /* _I386_PGTABLE_2LEVEL_H */