#ifndef _ASM_X86_PAGE_H #define _ASM_X86_PAGE_H #include <linux/const.h> /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT 12 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #ifdef __KERNEL__ #define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1) #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) /* Cast PAGE_MASK to a signed type so that it is sign-extended if virtual addresses are 32-bits but physical addresses are larger (ie, 32-bit PAE). */ #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */ #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK) /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */ #define PTE_FLAGS_MASK (~PTE_PFN_MASK) #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) #define HPAGE_SHIFT PMD_SHIFT #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) #define HUGE_MAX_HSTATE 2 #ifndef __ASSEMBLY__ #include <linux/types.h> #endif #ifdef CONFIG_X86_64 #include <asm/page_64.h> #else #include <asm/page_32.h> #endif /* CONFIG_X86_64 */ #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) #define VM_DATA_DEFAULT_FLAGS \ (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #ifndef __ASSEMBLY__ typedef struct { pgdval_t pgd; } pgd_t; typedef struct { pgprotval_t pgprot; } pgprot_t; extern int page_is_ram(unsigned long pagenr); extern int devmem_is_allowed(unsigned long pagenr); extern void map_devmem(unsigned long pfn, unsigned long size, pgprot_t vma_prot); extern void unmap_devmem(unsigned long pfn, unsigned long size, pgprot_t vma_prot); extern unsigned long max_low_pfn_mapped; extern unsigned long max_pfn_mapped; struct page; static inline void clear_user_page(void *page, unsigned long vaddr, struct page *pg) { clear_page(page); } static inline void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage) { copy_page(to, from); } #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE static inline pgd_t native_make_pgd(pgdval_t val) { return (pgd_t) { val }; } static inline pgdval_t native_pgd_val(pgd_t pgd) { return pgd.pgd; } #if PAGETABLE_LEVELS >= 3 #if PAGETABLE_LEVELS == 4 typedef struct { pudval_t pud; } pud_t; static inline pud_t native_make_pud(pmdval_t val) { return (pud_t) { val }; } static inline pudval_t native_pud_val(pud_t pud) { return pud.pud; } #else /* PAGETABLE_LEVELS == 3 */ #include <asm-generic/pgtable-nopud.h> static inline pudval_t native_pud_val(pud_t pud) { return native_pgd_val(pud.pgd); } #endif /* PAGETABLE_LEVELS == 4 */ typedef struct { pmdval_t pmd; } pmd_t; static inline pmd_t native_make_pmd(pmdval_t val) { return (pmd_t) { val }; } static inline pmdval_t native_pmd_val(pmd_t pmd) { return pmd.pmd; } #else /* PAGETABLE_LEVELS == 2 */ #include <asm-generic/pgtable-nopmd.h> static inline pmdval_t native_pmd_val(pmd_t pmd) { return native_pgd_val(pmd.pud.pgd); } #endif /* PAGETABLE_LEVELS >= 3 */ static inline pte_t native_make_pte(pteval_t val) { return (pte_t) { .pte = val }; } static inline pteval_t native_pte_val(pte_t pte) { return pte.pte; } static inline pteval_t native_pte_flags(pte_t pte) { return native_pte_val(pte) & PTE_FLAGS_MASK; } #define pgprot_val(x) ((x).pgprot) #define __pgprot(x) ((pgprot_t) { (x) } ) #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> #else /* !CONFIG_PARAVIRT */ #define pgd_val(x) native_pgd_val(x) #define __pgd(x) native_make_pgd(x) #ifndef __PAGETABLE_PUD_FOLDED #define pud_val(x) native_pud_val(x) #define __pud(x) native_make_pud(x) #endif #ifndef __PAGETABLE_PMD_FOLDED #define pmd_val(x) native_pmd_val(x) #define __pmd(x) native_make_pmd(x) #endif #define pte_val(x) native_pte_val(x) #define pte_flags(x) native_pte_flags(x) #define __pte(x) native_make_pte(x) #endif /* CONFIG_PARAVIRT */ #define __pa(x) __phys_addr((unsigned long)(x)) /* __pa_symbol should be used for C visible symbols. This seems to be the official gcc blessed way to do such arithmetic. */ #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x))) #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) #define __boot_va(x) __va(x) #define __boot_pa(x) __pa(x) #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #endif /* __ASSEMBLY__ */ #include <asm-generic/memory_model.h> #include <asm-generic/page.h> #define __HAVE_ARCH_GATE_AREA 1 #endif /* __KERNEL__ */ #endif /* _ASM_X86_PAGE_H */