4 #include <linux/config.h>
6 /* PAGE_SHIFT determines the page size */
9 #define PAGE_SIZE (0x1 << PAGE_SHIFT)
11 #define PAGE_SIZE (1UL << PAGE_SHIFT)
13 #define PAGE_MASK (~(PAGE_SIZE-1))
14 #define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & __PHYSICAL_MASK)
16 #define THREAD_ORDER 1
18 #define THREAD_SIZE (1 << (PAGE_SHIFT + THREAD_ORDER))
20 #define THREAD_SIZE (1UL << (PAGE_SHIFT + THREAD_ORDER))
22 #define CURRENT_MASK (~(THREAD_SIZE-1))
24 #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
25 #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
27 #define HPAGE_SHIFT PMD_SHIFT
28 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
29 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
30 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
35 extern unsigned long end_pfn;
37 void clear_page(void *);
38 void copy_page(void *, void *);
40 #define clear_user_page(page, vaddr, pg) clear_page(page)
41 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
43 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
44 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
46 * These are used to make use of C type-checking..
48 typedef struct { unsigned long pte; } pte_t;
49 typedef struct { unsigned long pmd; } pmd_t;
50 typedef struct { unsigned long pud; } pud_t;
51 typedef struct { unsigned long pgd; } pgd_t;
52 #define PTE_MASK PHYSICAL_PAGE_MASK
54 typedef struct { unsigned long pgprot; } pgprot_t;
56 #define pte_val(x) ((x).pte)
57 #define pmd_val(x) ((x).pmd)
58 #define pud_val(x) ((x).pud)
59 #define pgd_val(x) ((x).pgd)
60 #define pgprot_val(x) ((x).pgprot)
62 #define __pte(x) ((pte_t) { (x) } )
63 #define __pmd(x) ((pmd_t) { (x) } )
64 #define __pud(x) ((pud_t) { (x) } )
65 #define __pgd(x) ((pgd_t) { (x) } )
66 #define __pgprot(x) ((pgprot_t) { (x) } )
68 #define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START)
69 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
70 #define __START_KERNEL_map 0xffffffff80000000UL
71 #define __PAGE_OFFSET 0xffff810000000000UL
74 #define __PHYSICAL_START CONFIG_PHYSICAL_START
75 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
76 #define __START_KERNEL_map 0xffffffff80000000
77 #define __PAGE_OFFSET 0xffff810000000000
78 #endif /* !__ASSEMBLY__ */
80 /* to align the pointer to the (next) page boundary */
81 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
83 /* See Documentation/x86_64/mm.txt for a description of the memory map. */
84 #define __PHYSICAL_MASK_SHIFT 46
85 #define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1)
86 #define __VIRTUAL_MASK_SHIFT 48
87 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
89 #define KERNEL_TEXT_SIZE (40UL*1024*1024)
90 #define KERNEL_TEXT_START 0xffffffff80000000UL
96 #endif /* __ASSEMBLY__ */
98 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
100 /* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
101 Otherwise you risk miscompilation. */
102 #define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
103 /* __pa_symbol should be used for C visible symbols.
104 This seems to be the official gcc blessed way to do such arithmetic. */
105 #define __pa_symbol(x) \
107 asm("" : "=r" (v) : "0" (x)); \
110 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
111 #define __boot_va(x) __va(x)
112 #define __boot_pa(x) __pa(x)
113 #ifdef CONFIG_FLATMEM
114 #define pfn_to_page(pfn) (mem_map + (pfn))
115 #define page_to_pfn(page) ((unsigned long)((page) - mem_map))
116 #define pfn_valid(pfn) ((pfn) < end_pfn)
119 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
120 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
121 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
123 #define VM_DATA_DEFAULT_FLAGS \
124 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
125 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
127 #define __HAVE_ARCH_GATE_AREA 1
129 #endif /* __KERNEL__ */
131 #include <asm-generic/page.h>
133 #endif /* _X86_64_PAGE_H */