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1da177e4 LT |
1 | #ifndef _PPC_PAGE_H |
2 | #define _PPC_PAGE_H | |
3 | ||
a7f290da BH |
4 | #include <asm/asm-compat.h> |
5 | ||
1da177e4 LT |
6 | /* PAGE_SHIFT determines the page size */ |
7 | #define PAGE_SHIFT 12 | |
a7f290da | 8 | #define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) |
1da177e4 LT |
9 | |
10 | /* | |
11 | * Subtle: this is an int (not an unsigned long) and so it | |
12 | * gets extended to 64 bits the way want (i.e. with 1s). -- paulus | |
13 | */ | |
14 | #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) | |
15 | ||
16 | #ifdef __KERNEL__ | |
1da177e4 LT |
17 | |
18 | /* This must match what is in arch/ppc/Makefile */ | |
19 | #define PAGE_OFFSET CONFIG_KERNEL_START | |
20 | #define KERNELBASE PAGE_OFFSET | |
e4de0021 | 21 | #define is_kernel_addr(x) ((x) >= PAGE_OFFSET) |
1da177e4 LT |
22 | |
23 | #ifndef __ASSEMBLY__ | |
24 | ||
25 | /* | |
26 | * The basic type of a PTE - 64 bits for those CPUs with > 32 bit | |
27 | * physical addressing. For now this just the IBM PPC440. | |
28 | */ | |
29 | #ifdef CONFIG_PTE_64BIT | |
30 | typedef unsigned long long pte_basic_t; | |
31 | #define PTE_SHIFT (PAGE_SHIFT - 3) /* 512 ptes per page */ | |
32 | #define PTE_FMT "%16Lx" | |
33 | #else | |
34 | typedef unsigned long pte_basic_t; | |
35 | #define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */ | |
36 | #define PTE_FMT "%.8lx" | |
37 | #endif | |
38 | ||
7c8c6b97 PM |
39 | /* align addr on a size boundary - adjust address up/down if needed */ |
40 | #define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1))) | |
41 | #define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1))) | |
42 | ||
43 | /* align addr on a size boundary - adjust address up if needed */ | |
44 | #define _ALIGN(addr,size) _ALIGN_UP(addr,size) | |
45 | ||
46 | /* to align the pointer to the (next) page boundary */ | |
47 | #define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE) | |
48 | ||
49 | ||
1da177e4 LT |
50 | #undef STRICT_MM_TYPECHECKS |
51 | ||
52 | #ifdef STRICT_MM_TYPECHECKS | |
53 | /* | |
54 | * These are used to make use of C type-checking.. | |
55 | */ | |
56 | typedef struct { pte_basic_t pte; } pte_t; | |
57 | typedef struct { unsigned long pmd; } pmd_t; | |
58 | typedef struct { unsigned long pgd; } pgd_t; | |
59 | typedef struct { unsigned long pgprot; } pgprot_t; | |
60 | ||
61 | #define pte_val(x) ((x).pte) | |
62 | #define pmd_val(x) ((x).pmd) | |
63 | #define pgd_val(x) ((x).pgd) | |
64 | #define pgprot_val(x) ((x).pgprot) | |
65 | ||
66 | #define __pte(x) ((pte_t) { (x) } ) | |
67 | #define __pmd(x) ((pmd_t) { (x) } ) | |
68 | #define __pgd(x) ((pgd_t) { (x) } ) | |
69 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
70 | ||
71 | #else | |
72 | /* | |
73 | * .. while these make it easier on the compiler | |
74 | */ | |
75 | typedef pte_basic_t pte_t; | |
76 | typedef unsigned long pmd_t; | |
77 | typedef unsigned long pgd_t; | |
78 | typedef unsigned long pgprot_t; | |
79 | ||
80 | #define pte_val(x) (x) | |
81 | #define pmd_val(x) (x) | |
82 | #define pgd_val(x) (x) | |
83 | #define pgprot_val(x) (x) | |
84 | ||
85 | #define __pte(x) (x) | |
86 | #define __pmd(x) (x) | |
87 | #define __pgd(x) (x) | |
88 | #define __pgprot(x) (x) | |
89 | ||
90 | #endif | |
91 | ||
1da177e4 LT |
92 | struct page; |
93 | extern void clear_pages(void *page, int order); | |
94 | static inline void clear_page(void *page) { clear_pages(page, 0); } | |
95 | extern void copy_page(void *to, void *from); | |
96 | extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg); | |
97 | extern void copy_user_page(void *to, void *from, unsigned long vaddr, | |
98 | struct page *pg); | |
99 | ||
1da177e4 | 100 | #define PPC_MEMSTART 0 |
1da177e4 | 101 | #define PPC_MEMOFFSET PAGE_OFFSET |
1da177e4 | 102 | |
1da177e4 LT |
103 | #define ___pa(vaddr) ((vaddr)-PPC_MEMOFFSET) |
104 | #define ___va(paddr) ((paddr)+PPC_MEMOFFSET) | |
1da177e4 LT |
105 | |
106 | extern int page_is_ram(unsigned long pfn); | |
107 | ||
108 | #define __pa(x) ___pa((unsigned long)(x)) | |
109 | #define __va(x) ((void *)(___va((unsigned long)(x)))) | |
110 | ||
e6b6e3ff | 111 | #define ARCH_PFN_OFFSET 0 |
1da177e4 LT |
112 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
113 | #define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT) | |
114 | ||
e6b6e3ff | 115 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
1da177e4 LT |
116 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
117 | ||
118 | /* Pure 2^n version of get_order */ | |
119 | extern __inline__ int get_order(unsigned long size) | |
120 | { | |
121 | int lz; | |
122 | ||
123 | size = (size-1) >> PAGE_SHIFT; | |
124 | asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size)); | |
125 | return 32 - lz; | |
126 | } | |
127 | ||
128 | #endif /* __ASSEMBLY__ */ | |
129 | ||
130 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
131 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
132 | ||
b3c2ffd5 | 133 | /* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */ |
a7f290da BH |
134 | #define __HAVE_ARCH_GATE_AREA 1 |
135 | ||
f68d4c99 | 136 | #include <asm-generic/memory_model.h> |
1da177e4 LT |
137 | #endif /* __KERNEL__ */ |
138 | #endif /* _PPC_PAGE_H */ |