1#ifndef _ASM_X86_PAGE_DEFS_H 2#define _ASM_X86_PAGE_DEFS_H 3 4#include <linux/const.h> 5 6/* PAGE_SHIFT determines the page size */ 7#define PAGE_SHIFT 12 8#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 9#define PAGE_MASK (~(PAGE_SIZE-1)) 10 11#define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1) 12#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) 13 14/* Cast PAGE_MASK to a signed type so that it is sign-extended if 15 virtual addresses are 32-bits but physical addresses are larger 16 (ie, 32-bit PAE). */ 17#define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) 18 19#define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) 20#define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) 21 22#define HPAGE_SHIFT PMD_SHIFT 23#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 24#define HPAGE_MASK (~(HPAGE_SIZE - 1)) 25#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 26 27#define HUGE_MAX_HSTATE 2 28 29#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 30 31#define VM_DATA_DEFAULT_FLAGS \ 32 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ 33 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 34 35#ifdef CONFIG_X86_64 36#include <asm/page_64_types.h> 37#else 38#include <asm/page_32_types.h> 39#endif /* CONFIG_X86_64 */ 40 41#ifndef __ASSEMBLY__ 42 43extern int devmem_is_allowed(unsigned long pagenr); 44 45extern unsigned long max_low_pfn_mapped; 46extern unsigned long max_pfn_mapped; 47 48extern unsigned long init_memory_mapping(unsigned long start, 49 unsigned long end); 50 51extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn, 52 int acpi, int k8); 53extern void free_initmem(void); 54 55#endif /* !__ASSEMBLY__ */ 56 57#endif /* _ASM_X86_PAGE_DEFS_H */ 58