1#ifndef _ASM_X86_PAGE_DEFS_H 2#define _ASM_X86_PAGE_DEFS_H 3 4#include <linux/const.h> 5#include <linux/types.h> 6 7/* PAGE_SHIFT determines the page size */ 8#define PAGE_SHIFT 12 9#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 10#define PAGE_MASK (~(PAGE_SIZE-1)) 11 12#define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1)) 13#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) 14 15/* Cast PAGE_MASK to a signed type so that it is sign-extended if 16 virtual addresses are 32-bits but physical addresses are larger 17 (ie, 32-bit PAE). */ 18#define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) 19 20#define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) 21#define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) 22 23#define HPAGE_SHIFT PMD_SHIFT 24#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 25#define HPAGE_MASK (~(HPAGE_SIZE - 1)) 26#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 27 28#define HUGE_MAX_HSTATE 2 29 30#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 31 32#define VM_DATA_DEFAULT_FLAGS \ 33 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ 34 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 35 36#ifdef CONFIG_X86_64 37#include <asm/page_64_types.h> 38#else 39#include <asm/page_32_types.h> 40#endif /* CONFIG_X86_64 */ 41 42#ifndef __ASSEMBLY__ 43 44extern int devmem_is_allowed(unsigned long pagenr); 45 46extern unsigned long max_low_pfn_mapped; 47extern unsigned long max_pfn_mapped; 48 49static inline phys_addr_t get_max_mapped(void) 50{ 51 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT; 52} 53 54extern unsigned long init_memory_mapping(unsigned long start, 55 unsigned long end); 56 57extern void initmem_init(void); 58 59#endif /* !__ASSEMBLY__ */ 60 61#endif /* _ASM_X86_PAGE_DEFS_H */ 62