#ifndef _I386_PAGE_H #define _I386_PAGE_H /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT 12 #define PAGE_SIZE (1UL << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1)) #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT) #ifdef __KERNEL__ #ifndef __ASSEMBLY__ #ifdef CONFIG_X86_USE_3DNOW #include <asm/mmx.h> #define clear_page(page) mmx_clear_page((void *)(page)) #define copy_page(to,from) mmx_copy_page(to,from) #else /* * On older X86 processors it's not a win to use MMX here it seems. * Maybe the K6-III ? */ #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) #endif #define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) 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 /* * These are used to make use of C type-checking.. */ extern int nx_enabled; #ifdef CONFIG_X86_PAE typedef struct { unsigned long pte_low, pte_high; } pte_t; typedef struct { unsigned long long pmd; } pmd_t; typedef struct { unsigned long long pgd; } pgd_t; typedef struct { unsigned long long pgprot; } pgprot_t; static inline unsigned long long native_pgd_val(pgd_t pgd) { return pgd.pgd; } static inline unsigned long long native_pmd_val(pmd_t pmd) { return pmd.pmd; } static inline unsigned long long native_pte_val(pte_t pte) { return pte.pte_low | ((unsigned long long)pte.pte_high << 32); } static inline pgd_t native_make_pgd(unsigned long long val) { return (pgd_t) { val }; } static inline pmd_t native_make_pmd(unsigned long long val) { return (pmd_t) { val }; } static inline pte_t native_make_pte(unsigned long long val) { return (pte_t) { .pte_low = val, .pte_high = (val >> 32) } ; } #ifndef CONFIG_PARAVIRT #define pmd_val(x) native_pmd_val(x) #define __pmd(x) native_make_pmd(x) #endif #define HPAGE_SHIFT 21 #include <asm-generic/pgtable-nopud.h> #else /* !CONFIG_X86_PAE */ typedef struct { unsigned long pte_low; } pte_t; typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define boot_pte_t pte_t /* or would you rather have a typedef */ static inline unsigned long native_pgd_val(pgd_t pgd) { return pgd.pgd; } static inline unsigned long native_pte_val(pte_t pte) { return pte.pte_low; } static inline pgd_t native_make_pgd(unsigned long val) { return (pgd_t) { val }; } static inline pte_t native_make_pte(unsigned long val) { return (pte_t) { .pte_low = val }; } #define HPAGE_SHIFT 22 #include <asm-generic/pgtable-nopmd.h> #endif /* CONFIG_X86_PAE */ #define PTE_MASK PAGE_MASK #ifdef CONFIG_HUGETLB_PAGE #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA #endif #define pgprot_val(x) ((x).pgprot) #define __pgprot(x) ((pgprot_t) { (x) } ) #ifndef CONFIG_PARAVIRT #define pgd_val(x) native_pgd_val(x) #define __pgd(x) native_make_pgd(x) #define pte_val(x) native_pte_val(x) #define __pte(x) native_make_pte(x) #endif #endif /* !__ASSEMBLY__ */ /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) /* * This handles the memory map.. We could make this a config * option, but too many people screw it up, and too few need * it. * * A __PAGE_OFFSET of 0xC0000000 means that the kernel has * a virtual address space of one gigabyte, which limits the * amount of physical memory you can use to about 950MB. * * If you want more physical memory than this then see the CONFIG_HIGHMEM4G * and CONFIG_HIGHMEM64G options in the kernel configuration. */ #ifndef __ASSEMBLY__ struct vm_area_struct; /* * This much address space is reserved for vmalloc() and iomap() * as well as fixmap mappings. */ extern unsigned int __VMALLOC_RESERVE; extern int sysctl_legacy_va_layout; extern int page_is_ram(unsigned long pagenr); #endif /* __ASSEMBLY__ */ #ifdef __ASSEMBLY__ #define __PAGE_OFFSET CONFIG_PAGE_OFFSET #else #define __PAGE_OFFSET ((unsigned long)CONFIG_PAGE_OFFSET) #endif #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) #define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE) #define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE) #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) /* __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(RELOC_HIDE((unsigned long)(x),0)) #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) #ifdef CONFIG_FLATMEM #define pfn_valid(pfn) ((pfn) < max_mapnr) #endif /* CONFIG_FLATMEM */ #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #define VM_DATA_DEFAULT_FLAGS \ (VM_READ | VM_WRITE | \ ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #include <asm-generic/memory_model.h> #include <asm-generic/page.h> #define __HAVE_ARCH_GATE_AREA 1 #endif /* __KERNEL__ */ #endif /* _I386_PAGE_H */