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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 | 21 | |
53492b1d GS |
22 | #define HPAGE_SHIFT 20 |
23 | #define HPAGE_SIZE (1UL << HPAGE_SHIFT) | |
24 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
25 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
26 | ||
27 | #define ARCH_HAS_SETCLEAR_HUGE_PTE | |
28 | #define ARCH_HAS_HUGE_PTE_TYPE | |
29 | #define ARCH_HAS_PREPARE_HUGEPAGE | |
30 | #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH | |
31 | ||
274f5946 | 32 | #include <asm/setup.h> |
1da177e4 LT |
33 | #ifndef __ASSEMBLY__ |
34 | ||
1da177e4 LT |
35 | static inline void clear_page(void *page) |
36 | { | |
53492b1d GS |
37 | if (MACHINE_HAS_PFMF) { |
38 | asm volatile( | |
39 | " .insn rre,0xb9af0000,%0,%1" | |
40 | : : "d" (0x10000), "a" (page) : "memory", "cc"); | |
41 | } else { | |
42 | register unsigned long reg1 asm ("1") = 0; | |
43 | register void *reg2 asm ("2") = page; | |
44 | register unsigned long reg3 asm ("3") = 4096; | |
45 | asm volatile( | |
46 | " mvcl 2,0" | |
47 | : "+d" (reg2), "+d" (reg3) : "d" (reg1) | |
48 | : "memory", "cc"); | |
49 | } | |
1da177e4 LT |
50 | } |
51 | ||
52 | static inline void copy_page(void *to, void *from) | |
53 | { | |
94c12cc7 MS |
54 | if (MACHINE_HAS_MVPG) { |
55 | register unsigned long reg0 asm ("0") = 0; | |
56 | asm volatile( | |
57 | " mvpg %0,%1" | |
58 | : : "a" (to), "a" (from), "d" (reg0) | |
59 | : "memory", "cc"); | |
60 | } else | |
61 | asm volatile( | |
62 | " mvc 0(256,%0),0(%1)\n" | |
63 | " mvc 256(256,%0),256(%1)\n" | |
64 | " mvc 512(256,%0),512(%1)\n" | |
65 | " mvc 768(256,%0),768(%1)\n" | |
66 | " mvc 1024(256,%0),1024(%1)\n" | |
67 | " mvc 1280(256,%0),1280(%1)\n" | |
68 | " mvc 1536(256,%0),1536(%1)\n" | |
69 | " mvc 1792(256,%0),1792(%1)\n" | |
70 | " mvc 2048(256,%0),2048(%1)\n" | |
71 | " mvc 2304(256,%0),2304(%1)\n" | |
72 | " mvc 2560(256,%0),2560(%1)\n" | |
73 | " mvc 2816(256,%0),2816(%1)\n" | |
74 | " mvc 3072(256,%0),3072(%1)\n" | |
75 | " mvc 3328(256,%0),3328(%1)\n" | |
76 | " mvc 3584(256,%0),3584(%1)\n" | |
77 | " mvc 3840(256,%0),3840(%1)\n" | |
78 | : : "a" (to), "a" (from) : "memory"); | |
1da177e4 LT |
79 | } |
80 | ||
1da177e4 LT |
81 | #define clear_user_page(page, vaddr, pg) clear_page(page) |
82 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
83 | ||
769848c0 MG |
84 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ |
85 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) | |
1da177e4 LT |
86 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE |
87 | ||
1da177e4 LT |
88 | /* |
89 | * These are used to make use of C type-checking.. | |
90 | */ | |
91 | ||
92 | typedef struct { unsigned long pgprot; } pgprot_t; | |
93 | typedef struct { unsigned long pte; } pte_t; | |
1da177e4 | 94 | typedef struct { unsigned long pmd; } pmd_t; |
190a1d72 | 95 | typedef struct { unsigned long pud; } pud_t; |
1da177e4 | 96 | typedef struct { unsigned long pgd; } pgd_t; |
146e4b3c | 97 | typedef pte_t *pgtable_t; |
1da177e4 | 98 | |
146e4b3c MS |
99 | #define pgprot_val(x) ((x).pgprot) |
100 | #define pte_val(x) ((x).pte) | |
101 | #define pmd_val(x) ((x).pmd) | |
190a1d72 | 102 | #define pud_val(x) ((x).pud) |
1da177e4 LT |
103 | #define pgd_val(x) ((x).pgd) |
104 | ||
1da177e4 LT |
105 | #define __pte(x) ((pte_t) { (x) } ) |
106 | #define __pmd(x) ((pmd_t) { (x) } ) | |
107 | #define __pgd(x) ((pgd_t) { (x) } ) | |
108 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
109 | ||
110 | /* default storage key used for all pages */ | |
111 | extern unsigned int default_storage_key; | |
112 | ||
113 | static inline void | |
114 | page_set_storage_key(unsigned long addr, unsigned int skey) | |
115 | { | |
94c12cc7 | 116 | asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); |
1da177e4 LT |
117 | } |
118 | ||
119 | static inline unsigned int | |
120 | page_get_storage_key(unsigned long addr) | |
121 | { | |
122 | unsigned int skey; | |
123 | ||
94c12cc7 | 124 | asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0)); |
1da177e4 LT |
125 | return skey; |
126 | } | |
127 | ||
45e576b1 MS |
128 | #ifdef CONFIG_PAGE_STATES |
129 | ||
130 | struct page; | |
131 | void arch_free_page(struct page *page, int order); | |
132 | void arch_alloc_page(struct page *page, int order); | |
133 | ||
134 | #define HAVE_ARCH_FREE_PAGE | |
135 | #define HAVE_ARCH_ALLOC_PAGE | |
136 | ||
137 | #endif | |
138 | ||
1da177e4 LT |
139 | #endif /* !__ASSEMBLY__ */ |
140 | ||
1da177e4 LT |
141 | #define __PAGE_OFFSET 0x0UL |
142 | #define PAGE_OFFSET 0x0UL | |
143 | #define __pa(x) (unsigned long)(x) | |
144 | #define __va(x) (void *)(unsigned long)(x) | |
1da177e4 | 145 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
0b2b6e1d | 146 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) |
1da177e4 LT |
147 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
148 | ||
146e4b3c | 149 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ |
1da177e4 LT |
150 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
151 | ||
aed63043 | 152 | #include <asm-generic/memory_model.h> |
5b17e1cd | 153 | #include <asm-generic/getorder.h> |
fd4fd5aa | 154 | |
b020632e MS |
155 | #define __HAVE_ARCH_GATE_AREA 1 |
156 | ||
1da177e4 | 157 | #endif /* _S390_PAGE_H */ |