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 PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT)
13 #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1))
15 #define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT)
16 #define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1))
18 #define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1))
19 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
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
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)
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)
33 #define HUGE_MAX_HSTATE 2
35 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
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)
41 #define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \
42 CONFIG_PHYSICAL_ALIGN)
44 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
47 #include <asm/page_64_types.h>
48 #define IOREMAP_MAX_ORDER (PUD_SHIFT)
50 #include <asm/page_32_types.h>
51 #define IOREMAP_MAX_ORDER (PMD_SHIFT)
52 #endif /* CONFIG_X86_64 */
56 extern int devmem_is_allowed(unsigned long pagenr);
58 extern unsigned long max_low_pfn_mapped;
59 extern unsigned long max_pfn_mapped;
61 static inline phys_addr_t get_max_mapped(void)
63 return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
66 bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
68 extern unsigned long init_memory_mapping(unsigned long start,
71 extern void initmem_init(void);
73 #endif /* !__ASSEMBLY__ */
75 #endif /* _ASM_X86_PAGE_DEFS_H */