4 #include <linux/const.h>
6 /* PAGE_SHIFT determines the page size */
8 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
9 #define PAGE_MASK (~(PAGE_SIZE-1))
10 #define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & __PHYSICAL_MASK)
12 #define THREAD_ORDER 1
13 #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
14 #define CURRENT_MASK (~(THREAD_SIZE-1))
16 #define EXCEPTION_STACK_ORDER 0
17 #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
19 #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
20 #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
22 #define IRQSTACK_ORDER 2
23 #define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
25 #define STACKFAULT_STACK 1
26 #define DOUBLEFAULT_STACK 2
30 #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
32 #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
33 #define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT)
35 #define HPAGE_SHIFT PMD_SHIFT
36 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
37 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
38 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
43 extern unsigned long end_pfn;
44 extern unsigned long end_pfn_map;
46 void clear_page(void *page);
47 void copy_page(void *to, void *from);
51 static void inline clear_user_page(void *page, unsigned long vaddr,
57 static void inline copy_user_page(void *to, void *from, unsigned long vaddr,
63 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
64 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
65 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
67 * These are used to make use of C type-checking..
69 typedef struct { unsigned long pte; } pte_t;
70 typedef struct { unsigned long pmd; } pmd_t;
71 typedef struct { unsigned long pud; } pud_t;
72 typedef struct { unsigned long pgd; } pgd_t;
73 #define PTE_MASK PHYSICAL_PAGE_MASK
75 typedef struct { unsigned long pgprot; } pgprot_t;
77 extern unsigned long phys_base;
79 #define pte_val(x) ((x).pte)
80 #define pmd_val(x) ((x).pmd)
81 #define pud_val(x) ((x).pud)
82 #define pgd_val(x) ((x).pgd)
83 #define pgprot_val(x) ((x).pgprot)
85 #define __pte(x) ((pte_t) { (x) } )
86 #define __pmd(x) ((pmd_t) { (x) } )
87 #define __pud(x) ((pud_t) { (x) } )
88 #define __pgd(x) ((pgd_t) { (x) } )
89 #define __pgprot(x) ((pgprot_t) { (x) } )
91 #endif /* !__ASSEMBLY__ */
93 #define __PHYSICAL_START CONFIG_PHYSICAL_START
94 #define __KERNEL_ALIGN 0x200000
97 * Make sure kernel is aligned to 2MB address. Catching it at compile
98 * time is better. Change your config file and compile the kernel
99 * for a 2MB aligned address (CONFIG_PHYSICAL_START)
101 #if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
102 #error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
105 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
106 #define __START_KERNEL_map _AC(0xffffffff80000000, UL)
107 #define __PAGE_OFFSET _AC(0xffff810000000000, UL)
109 /* to align the pointer to the (next) page boundary */
110 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
112 /* See Documentation/x86_64/mm.txt for a description of the memory map. */
113 #define __PHYSICAL_MASK_SHIFT 46
114 #define __PHYSICAL_MASK ((_AC(1,UL) << __PHYSICAL_MASK_SHIFT) - 1)
115 #define __VIRTUAL_MASK_SHIFT 48
116 #define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1)
118 #define KERNEL_TEXT_SIZE (40*1024*1024)
119 #define KERNEL_TEXT_START _AC(0xffffffff80000000, UL)
120 #define PAGE_OFFSET __PAGE_OFFSET
126 extern unsigned long __phys_addr(unsigned long);
128 #endif /* __ASSEMBLY__ */
130 #define __pa(x) __phys_addr((unsigned long)(x))
131 #define __pa_symbol(x) __phys_addr((unsigned long)(x))
133 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
134 #define __boot_va(x) __va(x)
135 #define __boot_pa(x) __pa(x)
137 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
138 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
139 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
141 #define VM_DATA_DEFAULT_FLAGS \
142 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
143 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
145 #define __HAVE_ARCH_GATE_AREA 1
146 #define vmemmap ((struct page *)VMEMMAP_START)
148 #include <asm-generic/memory_model.h>
149 #include <asm-generic/page.h>
151 #endif /* __KERNEL__ */
153 #endif /* _X86_64_PAGE_H */