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
;
45 void clear_page(void *);
46 void copy_page(void *, void *);
48 #define clear_user_page(page, vaddr, pg) clear_page(page)
49 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
51 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
52 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
53 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
55 * These are used to make use of C type-checking..
57 typedef struct { unsigned long pte
; } pte_t
;
58 typedef struct { unsigned long pmd
; } pmd_t
;
59 typedef struct { unsigned long pud
; } pud_t
;
60 typedef struct { unsigned long pgd
; } pgd_t
;
61 #define PTE_MASK PHYSICAL_PAGE_MASK
63 typedef struct { unsigned long pgprot
; } pgprot_t
;
65 extern unsigned long phys_base
;
67 #define pte_val(x) ((x).pte)
68 #define pmd_val(x) ((x).pmd)
69 #define pud_val(x) ((x).pud)
70 #define pgd_val(x) ((x).pgd)
71 #define pgprot_val(x) ((x).pgprot)
73 #define __pte(x) ((pte_t) { (x) } )
74 #define __pmd(x) ((pmd_t) { (x) } )
75 #define __pud(x) ((pud_t) { (x) } )
76 #define __pgd(x) ((pgd_t) { (x) } )
77 #define __pgprot(x) ((pgprot_t) { (x) } )
79 #endif /* !__ASSEMBLY__ */
81 #define __PHYSICAL_START CONFIG_PHYSICAL_START
82 #define __KERNEL_ALIGN 0x200000
85 * Make sure kernel is aligned to 2MB address. Catching it at compile
86 * time is better. Change your config file and compile the kernel
87 * for a 2MB aligned address (CONFIG_PHYSICAL_START)
89 #if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
90 #error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
93 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
94 #define __START_KERNEL_map _AC(0xffffffff80000000, UL)
95 #define __PAGE_OFFSET _AC(0xffff810000000000, UL)
97 /* to align the pointer to the (next) page boundary */
98 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
100 /* See Documentation/x86_64/mm.txt for a description of the memory map. */
101 #define __PHYSICAL_MASK_SHIFT 46
102 #define __PHYSICAL_MASK ((_AC(1,UL) << __PHYSICAL_MASK_SHIFT) - 1)
103 #define __VIRTUAL_MASK_SHIFT 48
104 #define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1)
106 #define KERNEL_TEXT_SIZE (40*1024*1024)
107 #define KERNEL_TEXT_START _AC(0xffffffff80000000, UL)
108 #define PAGE_OFFSET __PAGE_OFFSET
114 extern unsigned long __phys_addr(unsigned long);
116 #endif /* __ASSEMBLY__ */
118 #define __pa(x) __phys_addr((unsigned long)(x))
119 #define __pa_symbol(x) __phys_addr((unsigned long)(x))
121 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
122 #define __boot_va(x) __va(x)
123 #define __boot_pa(x) __pa(x)
124 #ifdef CONFIG_FLATMEM
125 #define pfn_valid(pfn) ((pfn) < end_pfn)
128 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
129 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
130 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
132 #define VM_DATA_DEFAULT_FLAGS \
133 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
134 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
136 #define __HAVE_ARCH_GATE_AREA 1
137 #define vmemmap ((struct page *)VMEMMAP_START)
139 #include <asm-generic/memory_model.h>
140 #include <asm-generic/page.h>
142 #endif /* __KERNEL__ */
144 #endif /* _X86_64_PAGE_H */