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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-x86_64/page.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-x86_64/page.h')
-rw-r--r--include/asm-x86_64/page.h139
1 files changed, 139 insertions, 0 deletions
diff --git a/include/asm-x86_64/page.h b/include/asm-x86_64/page.h
new file mode 100644
index 000000000000..f43048035a03
--- /dev/null
+++ b/include/asm-x86_64/page.h
@@ -0,0 +1,139 @@
1#ifndef _X86_64_PAGE_H
2#define _X86_64_PAGE_H
3
4#include <linux/config.h>
5
6/* PAGE_SHIFT determines the page size */
7#define PAGE_SHIFT 12
8#ifdef __ASSEMBLY__
9#define PAGE_SIZE (0x1 << PAGE_SHIFT)
10#else
11#define PAGE_SIZE (1UL << PAGE_SHIFT)
12#endif
13#define PAGE_MASK (~(PAGE_SIZE-1))
14#define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & (__PHYSICAL_MASK << PAGE_SHIFT))
15
16#define THREAD_ORDER 1
17#ifdef __ASSEMBLY__
18#define THREAD_SIZE (1 << (PAGE_SHIFT + THREAD_ORDER))
19#else
20#define THREAD_SIZE (1UL << (PAGE_SHIFT + THREAD_ORDER))
21#endif
22#define CURRENT_MASK (~(THREAD_SIZE-1))
23
24#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
25#define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
26
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)
31
32#ifdef __KERNEL__
33#ifndef __ASSEMBLY__
34
35void clear_page(void *);
36void copy_page(void *, void *);
37
38#define clear_user_page(page, vaddr, pg) clear_page(page)
39#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
40
41#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
42#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
43/*
44 * These are used to make use of C type-checking..
45 */
46typedef struct { unsigned long pte; } pte_t;
47typedef struct { unsigned long pmd; } pmd_t;
48typedef struct { unsigned long pud; } pud_t;
49typedef struct { unsigned long pgd; } pgd_t;
50#define PTE_MASK PHYSICAL_PAGE_MASK
51
52typedef struct { unsigned long pgprot; } pgprot_t;
53
54#define pte_val(x) ((x).pte)
55#define pmd_val(x) ((x).pmd)
56#define pud_val(x) ((x).pud)
57#define pgd_val(x) ((x).pgd)
58#define pgprot_val(x) ((x).pgprot)
59
60#define __pte(x) ((pte_t) { (x) } )
61#define __pmd(x) ((pmd_t) { (x) } )
62#define __pud(x) ((pud_t) { (x) } )
63#define __pgd(x) ((pgd_t) { (x) } )
64#define __pgprot(x) ((pgprot_t) { (x) } )
65
66#define __START_KERNEL 0xffffffff80100000UL
67#define __START_KERNEL_map 0xffffffff80000000UL
68#define __PAGE_OFFSET 0xffff810000000000UL
69
70#else
71#define __START_KERNEL 0xffffffff80100000
72#define __START_KERNEL_map 0xffffffff80000000
73#define __PAGE_OFFSET 0xffff810000000000
74#endif /* !__ASSEMBLY__ */
75
76/* to align the pointer to the (next) page boundary */
77#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
78
79/* See Documentation/x86_64/mm.txt for a description of the memory map. */
80#define __PHYSICAL_MASK_SHIFT 46
81#define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1)
82#define __VIRTUAL_MASK_SHIFT 48
83#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
84
85#define KERNEL_TEXT_SIZE (40UL*1024*1024)
86#define KERNEL_TEXT_START 0xffffffff80000000UL
87
88#ifndef __ASSEMBLY__
89
90#include <asm/bug.h>
91
92/* Pure 2^n version of get_order */
93extern __inline__ int get_order(unsigned long size)
94{
95 int order;
96
97 size = (size-1) >> (PAGE_SHIFT-1);
98 order = -1;
99 do {
100 size >>= 1;
101 order++;
102 } while (size);
103 return order;
104}
105
106#endif /* __ASSEMBLY__ */
107
108#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
109
110/* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
111 Otherwise you risk miscompilation. */
112#define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
113/* __pa_symbol should be used for C visible symbols.
114 This seems to be the official gcc blessed way to do such arithmetic. */
115#define __pa_symbol(x) \
116 ({unsigned long v; \
117 asm("" : "=r" (v) : "0" (x)); \
118 __pa(v); })
119
120#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
121#ifndef CONFIG_DISCONTIGMEM
122#define pfn_to_page(pfn) (mem_map + (pfn))
123#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
124#define pfn_valid(pfn) ((pfn) < max_mapnr)
125#endif
126
127#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
128#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
129#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
130
131#define VM_DATA_DEFAULT_FLAGS \
132 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
133 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
134
135#define __HAVE_ARCH_GATE_AREA 1
136
137#endif /* __KERNEL__ */
138
139#endif /* _X86_64_PAGE_H */