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 PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) 13 #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) 14 15 #define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT) 16 #define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1)) 17 18 #define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1)) 19 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) 20 21 /* Cast *PAGE_MASK to a signed type so that it is sign-extended if 22 virtual addresses are 32-bits but physical addresses are larger 23 (ie, 32-bit PAE). */ 24 #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) 25 #define PHYSICAL_PMD_PAGE_MASK (((signed long)PMD_PAGE_MASK) & __PHYSICAL_MASK) 26 #define PHYSICAL_PUD_PAGE_MASK (((signed long)PUD_PAGE_MASK) & __PHYSICAL_MASK) 27 28 #define HPAGE_SHIFT PMD_SHIFT 29 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 30 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 31 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 32 33 #define HUGE_MAX_HSTATE 2 34 35 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 36 37 #define VM_DATA_DEFAULT_FLAGS \ 38 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ 39 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 40 41 #define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \ 42 CONFIG_PHYSICAL_ALIGN) 43 44 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) 45 46 #ifdef CONFIG_X86_64 47 #include <asm/page_64_types.h> 48 #define IOREMAP_MAX_ORDER (PUD_SHIFT) 49 #else 50 #include <asm/page_32_types.h> 51 #define IOREMAP_MAX_ORDER (PMD_SHIFT) 52 #endif /* CONFIG_X86_64 */ 53 54 #ifndef __ASSEMBLY__ 55 56 extern int devmem_is_allowed(unsigned long pagenr); 57 58 extern unsigned long max_low_pfn_mapped; 59 extern unsigned long max_pfn_mapped; 60 61 static inline phys_addr_t get_max_mapped(void) 62 { 63 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT; 64 } 65 66 bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn); 67 68 extern unsigned long init_memory_mapping(unsigned long start, 69 unsigned long end); 70 71 extern void initmem_init(void); 72 73 #endif /* !__ASSEMBLY__ */ 74 75 #endif /* _ASM_X86_PAGE_DEFS_H */ 76