1 #ifndef _ASM_X86_PAGE_DEFS_H
2 #define _ASM_X86_PAGE_DEFS_H
4 #include <linux/const.h>
5 #include <linux/types.h>
7 /* PAGE_SHIFT determines the page size */
9 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
10 #define PAGE_MASK (~(PAGE_SIZE-1))
12 #define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1))
13 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
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
18 #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK)
20 #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT)
21 #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1))
23 #define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT)
24 #define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1))
26 #define HPAGE_SHIFT PMD_SHIFT
27 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
28 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
29 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
31 #define HUGE_MAX_HSTATE 2
33 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
35 #define VM_DATA_DEFAULT_FLAGS \
36 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
37 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
39 #define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \
40 CONFIG_PHYSICAL_ALIGN)
42 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
45 #include <asm/page_64_types.h>
46 #define IOREMAP_MAX_ORDER (PUD_SHIFT)
48 #include <asm/page_32_types.h>
49 #define IOREMAP_MAX_ORDER (PMD_SHIFT)
50 #endif /* CONFIG_X86_64 */
54 extern int devmem_is_allowed(unsigned long pagenr);
56 extern unsigned long max_low_pfn_mapped;
57 extern unsigned long max_pfn_mapped;
59 static inline phys_addr_t get_max_mapped(void)
61 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
64 bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
66 extern unsigned long init_memory_mapping(unsigned long start,
69 extern void initmem_init(void);
71 #endif /* !__ASSEMBLY__ */
73 #endif /* _ASM_X86_PAGE_DEFS_H */