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1da177e4 LT |
1 | /* |
2 | * include/asm-s390/page.h | |
3 | * | |
4 | * S390 version | |
5 | * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
6 | * Author(s): Hartmut Penner (hp@de.ibm.com) | |
7 | */ | |
8 | ||
9 | #ifndef _S390_PAGE_H | |
10 | #define _S390_PAGE_H | |
11 | ||
52480ee5 | 12 | #include <linux/const.h> |
1da177e4 LT |
13 | #include <asm/types.h> |
14 | ||
15 | /* PAGE_SHIFT determines the page size */ | |
16 | #define PAGE_SHIFT 12 | |
52480ee5 | 17 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
1da177e4 | 18 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
0b642ede PO |
19 | #define PAGE_DEFAULT_ACC 0 |
20 | #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) | |
1da177e4 LT |
21 | |
22 | #ifdef __KERNEL__ | |
274f5946 | 23 | #include <asm/setup.h> |
1da177e4 LT |
24 | #ifndef __ASSEMBLY__ |
25 | ||
1da177e4 LT |
26 | static inline void clear_page(void *page) |
27 | { | |
94c12cc7 MS |
28 | register unsigned long reg1 asm ("1") = 0; |
29 | register void *reg2 asm ("2") = page; | |
30 | register unsigned long reg3 asm ("3") = 4096; | |
31 | asm volatile( | |
32 | " mvcl 2,0" | |
33 | : "+d" (reg2), "+d" (reg3) : "d" (reg1) : "memory", "cc"); | |
1da177e4 LT |
34 | } |
35 | ||
36 | static inline void copy_page(void *to, void *from) | |
37 | { | |
94c12cc7 MS |
38 | if (MACHINE_HAS_MVPG) { |
39 | register unsigned long reg0 asm ("0") = 0; | |
40 | asm volatile( | |
41 | " mvpg %0,%1" | |
42 | : : "a" (to), "a" (from), "d" (reg0) | |
43 | : "memory", "cc"); | |
44 | } else | |
45 | asm volatile( | |
46 | " mvc 0(256,%0),0(%1)\n" | |
47 | " mvc 256(256,%0),256(%1)\n" | |
48 | " mvc 512(256,%0),512(%1)\n" | |
49 | " mvc 768(256,%0),768(%1)\n" | |
50 | " mvc 1024(256,%0),1024(%1)\n" | |
51 | " mvc 1280(256,%0),1280(%1)\n" | |
52 | " mvc 1536(256,%0),1536(%1)\n" | |
53 | " mvc 1792(256,%0),1792(%1)\n" | |
54 | " mvc 2048(256,%0),2048(%1)\n" | |
55 | " mvc 2304(256,%0),2304(%1)\n" | |
56 | " mvc 2560(256,%0),2560(%1)\n" | |
57 | " mvc 2816(256,%0),2816(%1)\n" | |
58 | " mvc 3072(256,%0),3072(%1)\n" | |
59 | " mvc 3328(256,%0),3328(%1)\n" | |
60 | " mvc 3584(256,%0),3584(%1)\n" | |
61 | " mvc 3840(256,%0),3840(%1)\n" | |
62 | : : "a" (to), "a" (from) : "memory"); | |
1da177e4 LT |
63 | } |
64 | ||
1da177e4 LT |
65 | #define clear_user_page(page, vaddr, pg) clear_page(page) |
66 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
67 | ||
769848c0 MG |
68 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ |
69 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) | |
1da177e4 LT |
70 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE |
71 | ||
1da177e4 LT |
72 | /* |
73 | * These are used to make use of C type-checking.. | |
74 | */ | |
75 | ||
76 | typedef struct { unsigned long pgprot; } pgprot_t; | |
77 | typedef struct { unsigned long pte; } pte_t; | |
78 | ||
79 | #define pte_val(x) ((x).pte) | |
80 | #define pgprot_val(x) ((x).pgprot) | |
81 | ||
82 | #ifndef __s390x__ | |
83 | ||
84 | typedef struct { unsigned long pmd; } pmd_t; | |
85 | typedef struct { | |
86 | unsigned long pgd0; | |
87 | unsigned long pgd1; | |
88 | unsigned long pgd2; | |
89 | unsigned long pgd3; | |
90 | } pgd_t; | |
91 | ||
92 | #define pmd_val(x) ((x).pmd) | |
93 | #define pgd_val(x) ((x).pgd0) | |
94 | ||
95 | #else /* __s390x__ */ | |
96 | ||
97 | typedef struct { | |
98 | unsigned long pmd0; | |
99 | unsigned long pmd1; | |
100 | } pmd_t; | |
101 | typedef struct { unsigned long pgd; } pgd_t; | |
102 | ||
103 | #define pmd_val(x) ((x).pmd0) | |
104 | #define pmd_val1(x) ((x).pmd1) | |
105 | #define pgd_val(x) ((x).pgd) | |
106 | ||
107 | #endif /* __s390x__ */ | |
108 | ||
109 | #define __pte(x) ((pte_t) { (x) } ) | |
110 | #define __pmd(x) ((pmd_t) { (x) } ) | |
111 | #define __pgd(x) ((pgd_t) { (x) } ) | |
112 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
113 | ||
114 | /* default storage key used for all pages */ | |
115 | extern unsigned int default_storage_key; | |
116 | ||
117 | static inline void | |
118 | page_set_storage_key(unsigned long addr, unsigned int skey) | |
119 | { | |
94c12cc7 | 120 | asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); |
1da177e4 LT |
121 | } |
122 | ||
123 | static inline unsigned int | |
124 | page_get_storage_key(unsigned long addr) | |
125 | { | |
126 | unsigned int skey; | |
127 | ||
94c12cc7 | 128 | asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0)); |
1da177e4 LT |
129 | return skey; |
130 | } | |
131 | ||
f4eb07c1 HC |
132 | extern unsigned long max_pfn; |
133 | ||
134 | static inline int pfn_valid(unsigned long pfn) | |
135 | { | |
136 | unsigned long dummy; | |
137 | int ccode; | |
138 | ||
139 | if (pfn >= max_pfn) | |
140 | return 0; | |
141 | ||
142 | asm volatile( | |
143 | " lra %0,0(%2)\n" | |
144 | " ipm %1\n" | |
145 | " srl %1,28\n" | |
146 | : "=d" (dummy), "=d" (ccode) | |
147 | : "a" (pfn << PAGE_SHIFT) | |
148 | : "cc"); | |
149 | return !ccode; | |
150 | } | |
151 | ||
1da177e4 LT |
152 | #endif /* !__ASSEMBLY__ */ |
153 | ||
154 | /* to align the pointer to the (next) page boundary */ | |
155 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
156 | ||
157 | #define __PAGE_OFFSET 0x0UL | |
158 | #define PAGE_OFFSET 0x0UL | |
159 | #define __pa(x) (unsigned long)(x) | |
160 | #define __va(x) (void *)(unsigned long)(x) | |
1da177e4 | 161 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
0b2b6e1d | 162 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) |
1da177e4 LT |
163 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
164 | ||
165 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
166 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
167 | ||
aed63043 | 168 | #include <asm-generic/memory_model.h> |
fd4fd5aa SR |
169 | #include <asm-generic/page.h> |
170 | ||
274f5946 DW |
171 | #endif /* __KERNEL__ */ |
172 | ||
1da177e4 | 173 | #endif /* _S390_PAGE_H */ |