1#ifndef _ASM_X86_PAGE_H 2#define _ASM_X86_PAGE_H 3 4#include <linux/types.h> 5 6#ifdef __KERNEL__ 7 8#include <asm/page_types.h> 9 10#ifdef CONFIG_X86_64 11#include <asm/page_64.h> 12#else 13#include <asm/page_32.h> 14#endif /* CONFIG_X86_64 */ 15 16#ifndef __ASSEMBLY__ 17 18struct page; 19 20static inline void clear_user_page(void *page, unsigned long vaddr, 21 struct page *pg) 22{ 23 clear_page(page); 24} 25 26static inline void copy_user_page(void *to, void *from, unsigned long vaddr, 27 struct page *topage) 28{ 29 copy_page(to, from); 30} 31 32#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ 33 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) 34#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE 35 36#define __pa(x) __phys_addr((unsigned long)(x)) 37#define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x)) 38/* __pa_symbol should be used for C visible symbols. 39 This seems to be the official gcc blessed way to do such arithmetic. */ 40/* 41 * We need __phys_reloc_hide() here because gcc may assume that there is no 42 * overflow during __pa() calculation and can optimize it unexpectedly. 43 * Newer versions of gcc provide -fno-strict-overflow switch to handle this 44 * case properly. Once all supported versions of gcc understand it, we can 45 * remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated) 46 */ 47#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x))) 48 49#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 50 51#define __boot_va(x) __va(x) 52#define __boot_pa(x) __pa(x) 53 54/* 55 * virt_to_page(kaddr) returns a valid pointer if and only if 56 * virt_addr_valid(kaddr) returns true. 57 */ 58#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 59#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 60extern bool __virt_addr_valid(unsigned long kaddr); 61#define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr)) 62 63#endif /* __ASSEMBLY__ */ 64 65#include <asm-generic/memory_model.h> 66#include <asm-generic/getorder.h> 67 68#define __HAVE_ARCH_GATE_AREA 1 69 70#endif /* __KERNEL__ */ 71#endif /* _ASM_X86_PAGE_H */ 72