#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__
#include
#ifdef CONFIG_X86_USE_3DNOW
#include
#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)
/* * These are used to make use of C type-checking.. */ #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; #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32)) #define HPAGE_SHIFT 21 #else typedef struct { unsigned long pte_low; } pte_t; typedef struct { unsigned long pmd; } pmd_t; typedef struct { unsigned long pgd; } pgd_t; #define boot_pte_t pte_t /* or would you rather have a typedef */ #define pte_val(x) ((x).pte_low) #define HPAGE_SHIFT 22 #endif #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) #endif
typedef struct { unsigned long pgprot; } pgprot_t;
#define pmd_val(x) ((x).pmd) #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot)
#define __pte(x) ((pte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } )
#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. */
/* * This much address space is reserved for vmalloc() and iomap() * as well as fixmap mappings. */ #define __VMALLOC_RESERVE (128 << 20)
#ifndef __ASSEMBLY__
/* Pure 2^n version of get_order */ static __inline__ int get_order(unsigned long size) { int order;
size = (size-1) >> (PAGE_SHIFT-1); order = -1; do { size >>= 1; order++; } while (size); return order; }
#endif /* __ASSEMBLY__ */
#ifdef __ASSEMBLY__ #define __PAGE_OFFSET (0xC0000000) #else #define __PAGE_OFFSET (0xC0000000UL) #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) #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) #ifndef CONFIG_DISCONTIGMEM #define pfn_to_page(pfn) (mem_map + (pfn)) #define page_to_pfn(page) ((unsigned long)((page) - mem_map)) #define pfn_valid(pfn) ((pfn) < max_mapnr) #endif /* !CONFIG_DISCONTIGMEM */ #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 | VM_EXEC | / VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#endif /* __KERNEL__ */
#endif /* _I386_PAGE_H */
===============
此文件转载自
http://hi.baidu.com/bbps/blog/item/aeaeda2a879c219c023bf657.html
参考
http://xmecity.5d6d.com/viewthread.php?tid=75
================================
root@ubuntu:/usr/include/asm# ls
a.out.h fcntl.h mman.h posix_types.h sigcontext32.h termbits.h
auxvec.h ioctl.h msgbuf.h prctl.h sigcontext.h termios.h
bitsperlong.h ioctls.h msr.h processor-flags.h siginfo.h types.h
boot.h ipcbuf.h msr-index.h ptrace-abi.h signal.h ucontext.h
bootparam.h ist.h mtrr.h ptrace.h socket.h unistd_32.h
byteorder.h kvm.h param.h resource.h sockios.h unistd_64.h
debugreg.h kvm_para.h poll.h sembuf.h statfs.h unistd.h
e820.h ldt.h posix_types_32.h setup.h stat.h vm86.h
errno.h mce.h posix_types_64.h shmbuf.h swab.h vsyscall.h
