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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/x86/include/asm/page_types.h
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 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)
28 #define HUGE_MAX_HSTATE 2
30 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
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)
36 #define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \
37 CONFIG_PHYSICAL_ALIGN)
39 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
42 #include <asm/page_64_types.h>
44 #include <asm/page_32_types.h>
45 #endif /* CONFIG_X86_64 */
49 extern int devmem_is_allowed(unsigned long pagenr
);
51 extern unsigned long max_low_pfn_mapped
;
52 extern unsigned long max_pfn_mapped
;
54 static inline phys_addr_t
get_max_low_mapped(void)
56 return (phys_addr_t
)max_low_pfn_mapped
<< PAGE_SHIFT
;
59 bool pfn_range_is_mapped(unsigned long start_pfn
, unsigned long end_pfn
);
61 extern unsigned long init_memory_mapping(unsigned long start
,
64 extern void initmem_init(void);
66 #endif /* !__ASSEMBLY__ */
68 #endif /* _ASM_X86_PAGE_DEFS_H */