| #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__ |
| |
| /* 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_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */ |
| #define PTE_MASK ((pteval_t)PHYSICAL_PAGE_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) |
| |
| /* to align the pointer to the (next) page boundary */ |
| #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) |
| |
| #define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1) |
| #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) |
| |
| #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__ |
| |
| extern int page_is_ram(unsigned long pagenr); |
| extern int devmem_is_allowed(unsigned long pagenr); |
| |
| 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 |
| |
| typedef struct { pgdval_t pgd; } pgd_t; |
| typedef struct { pgprotval_t pgprot; } pgprot_t; |
| |
| 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; |
| } |
| |
| #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(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 */ |