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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/asm-x86_64/page.h
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
17 #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
18 #define CURRENT_MASK (~(THREAD_SIZE-1))
20 #define EXCEPTION_STACK_ORDER 0
21 #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
23 #define DEBUG_STACK_ORDER EXCEPTION_STACK_ORDER
24 #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
26 #define IRQSTACK_ORDER 2
27 #define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
29 #define STACKFAULT_STACK 1
30 #define DOUBLEFAULT_STACK 2
34 #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
36 #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
37 #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
39 #define HPAGE_SHIFT PMD_SHIFT
40 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
41 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
42 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
47 extern unsigned long end_pfn
;
49 void clear_page(void *);
50 void copy_page(void *, void *);
52 #define clear_user_page(page, vaddr, pg) clear_page(page)
53 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
55 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
56 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
58 * These are used to make use of C type-checking..
60 typedef struct { unsigned long pte
; } pte_t
;
61 typedef struct { unsigned long pmd
; } pmd_t
;
62 typedef struct { unsigned long pud
; } pud_t
;
63 typedef struct { unsigned long pgd
; } pgd_t
;
64 #define PTE_MASK PHYSICAL_PAGE_MASK
66 typedef struct { unsigned long pgprot
; } pgprot_t
;
68 #define pte_val(x) ((x).pte)
69 #define pmd_val(x) ((x).pmd)
70 #define pud_val(x) ((x).pud)
71 #define pgd_val(x) ((x).pgd)
72 #define pgprot_val(x) ((x).pgprot)
74 #define __pte(x) ((pte_t) { (x) } )
75 #define __pmd(x) ((pmd_t) { (x) } )
76 #define __pud(x) ((pud_t) { (x) } )
77 #define __pgd(x) ((pgd_t) { (x) } )
78 #define __pgprot(x) ((pgprot_t) { (x) } )
80 #define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START)
81 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
82 #define __START_KERNEL_map 0xffffffff80000000UL
83 #define __PAGE_OFFSET 0xffff810000000000UL
86 #define __PHYSICAL_START CONFIG_PHYSICAL_START
87 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
88 #define __START_KERNEL_map 0xffffffff80000000
89 #define __PAGE_OFFSET 0xffff810000000000
90 #endif /* !__ASSEMBLY__ */
92 /* to align the pointer to the (next) page boundary */
93 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
95 /* See Documentation/x86_64/mm.txt for a description of the memory map. */
96 #define __PHYSICAL_MASK_SHIFT 46
97 #define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1)
98 #define __VIRTUAL_MASK_SHIFT 48
99 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
101 #define KERNEL_TEXT_SIZE (40UL*1024*1024)
102 #define KERNEL_TEXT_START 0xffffffff80000000UL
108 #endif /* __ASSEMBLY__ */
110 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
112 /* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
113 Otherwise you risk miscompilation. */
114 #define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
115 /* __pa_symbol should be used for C visible symbols.
116 This seems to be the official gcc blessed way to do such arithmetic. */
117 #define __pa_symbol(x) \
119 asm("" : "=r" (v) : "0" (x)); \
122 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
123 #define __boot_va(x) __va(x)
124 #define __boot_pa(x) __pa(x)
125 #ifdef CONFIG_FLATMEM
126 #define pfn_to_page(pfn) (mem_map + (pfn))
127 #define page_to_pfn(page) ((unsigned long)((page) - mem_map))
128 #define pfn_valid(pfn) ((pfn) < end_pfn)
131 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
132 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
133 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
135 #define VM_DATA_DEFAULT_FLAGS \
136 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
137 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
139 #define __HAVE_ARCH_GATE_AREA 1
141 #endif /* __KERNEL__ */
143 #include <asm-generic/page.h>
145 #endif /* _X86_64_PAGE_H */