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 44 extern int devmem_is_allowed(unsigned long pagenr); 45 46 extern unsigned long max_low_pfn_mapped; 47 extern unsigned long max_pfn_mapped; 48 get_max_mapped(void)49static inline phys_addr_t get_max_mapped(void) 50 { 51 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT; 52 } 53 54 bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn); 55 56 extern unsigned long init_memory_mapping(unsigned long start, 57 unsigned long end); 58 59 extern void initmem_init(void); 60 61 #endif /* !__ASSEMBLY__ */ 62 63 #endif /* _ASM_X86_PAGE_DEFS_H */ 64