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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 | 2 | * S390 version |
a53c8fab | 3 | * Copyright IBM Corp. 1999, 2000 |
1da177e4 LT |
4 | * Author(s): Hartmut Penner (hp@de.ibm.com) |
5 | */ | |
6 | ||
7 | #ifndef _S390_PAGE_H | |
8 | #define _S390_PAGE_H | |
9 | ||
52480ee5 | 10 | #include <linux/const.h> |
1da177e4 LT |
11 | #include <asm/types.h> |
12 | ||
c67da7c7 HC |
13 | #define _PAGE_SHIFT 12 |
14 | #define _PAGE_SIZE (_AC(1, UL) << _PAGE_SHIFT) | |
15 | #define _PAGE_MASK (~(_PAGE_SIZE - 1)) | |
16 | ||
1da177e4 | 17 | /* PAGE_SHIFT determines the page size */ |
c67da7c7 HC |
18 | #define PAGE_SHIFT _PAGE_SHIFT |
19 | #define PAGE_SIZE _PAGE_SIZE | |
20 | #define PAGE_MASK _PAGE_MASK | |
0b642ede PO |
21 | #define PAGE_DEFAULT_ACC 0 |
22 | #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) | |
1da177e4 | 23 | |
41318bfe | 24 | #define HPAGE_SHIFT 20 |
53492b1d GS |
25 | #define HPAGE_SIZE (1UL << HPAGE_SHIFT) |
26 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
27 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
d08de8e2 | 28 | #define HUGE_MAX_HSTATE 2 |
53492b1d GS |
29 | |
30 | #define ARCH_HAS_SETCLEAR_HUGE_PTE | |
31 | #define ARCH_HAS_HUGE_PTE_TYPE | |
32 | #define ARCH_HAS_PREPARE_HUGEPAGE | |
33 | #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH | |
34 | ||
41318bfe DD |
35 | #include <asm/setup.h> |
36 | #ifndef __ASSEMBLY__ | |
37 | ||
de3fa841 HC |
38 | void __storage_key_init_range(unsigned long start, unsigned long end); |
39 | ||
127c1fef MS |
40 | static inline void storage_key_init_range(unsigned long start, unsigned long end) |
41 | { | |
de3fa841 HC |
42 | if (PAGE_DEFAULT_KEY) |
43 | __storage_key_init_range(start, end); | |
127c1fef | 44 | } |
6b70a920 | 45 | |
fb3d1c08 | 46 | #define clear_page(page) memset((page), 0, PAGE_SIZE) |
1da177e4 | 47 | |
dba6bb60 HC |
48 | /* |
49 | * copy_page uses the mvcl instruction with 0xb0 padding byte in order to | |
50 | * bypass caches when copying a page. Especially when copying huge pages | |
51 | * this keeps L1 and L2 data caches alive. | |
52 | */ | |
1da177e4 LT |
53 | static inline void copy_page(void *to, void *from) |
54 | { | |
dba6bb60 HC |
55 | register void *reg2 asm ("2") = to; |
56 | register unsigned long reg3 asm ("3") = 0x1000; | |
57 | register void *reg4 asm ("4") = from; | |
58 | register unsigned long reg5 asm ("5") = 0xb0001000; | |
59 | asm volatile( | |
60 | " mvcl 2,4" | |
61 | : "+d" (reg2), "+d" (reg3), "+d" (reg4), "+d" (reg5) | |
62 | : : "memory", "cc"); | |
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; | |
b2fa47e6 | 77 | typedef struct { unsigned long pgste; } pgste_t; |
1da177e4 | 78 | typedef struct { unsigned long pte; } pte_t; |
1da177e4 | 79 | typedef struct { unsigned long pmd; } pmd_t; |
190a1d72 | 80 | typedef struct { unsigned long pud; } pud_t; |
1aea9b3f | 81 | typedef struct { unsigned long p4d; } p4d_t; |
1da177e4 | 82 | typedef struct { unsigned long pgd; } pgd_t; |
146e4b3c | 83 | typedef pte_t *pgtable_t; |
1da177e4 | 84 | |
146e4b3c | 85 | #define pgprot_val(x) ((x).pgprot) |
b2fa47e6 | 86 | #define pgste_val(x) ((x).pgste) |
146e4b3c MS |
87 | #define pte_val(x) ((x).pte) |
88 | #define pmd_val(x) ((x).pmd) | |
190a1d72 | 89 | #define pud_val(x) ((x).pud) |
1aea9b3f | 90 | #define p4d_val(x) ((x).p4d) |
1da177e4 LT |
91 | #define pgd_val(x) ((x).pgd) |
92 | ||
b2fa47e6 | 93 | #define __pgste(x) ((pgste_t) { (x) } ) |
1da177e4 LT |
94 | #define __pte(x) ((pte_t) { (x) } ) |
95 | #define __pmd(x) ((pmd_t) { (x) } ) | |
b2fa47e6 | 96 | #define __pud(x) ((pud_t) { (x) } ) |
1aea9b3f | 97 | #define __p4d(x) ((p4d_t) { (x) } ) |
1da177e4 LT |
98 | #define __pgd(x) ((pgd_t) { (x) } ) |
99 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
100 | ||
2d42552d MS |
101 | static inline void page_set_storage_key(unsigned long addr, |
102 | unsigned char skey, int mapped) | |
1da177e4 | 103 | { |
e2b8d7af MS |
104 | if (!mapped) |
105 | asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0" | |
106 | : : "d" (skey), "a" (addr)); | |
107 | else | |
108 | asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); | |
1da177e4 LT |
109 | } |
110 | ||
2d42552d | 111 | static inline unsigned char page_get_storage_key(unsigned long addr) |
1da177e4 | 112 | { |
2d42552d | 113 | unsigned char skey; |
1da177e4 | 114 | |
2d42552d | 115 | asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr)); |
1da177e4 LT |
116 | return skey; |
117 | } | |
118 | ||
2d42552d MS |
119 | static inline int page_reset_referenced(unsigned long addr) |
120 | { | |
a7e19ab5 | 121 | int cc; |
2d42552d MS |
122 | |
123 | asm volatile( | |
124 | " rrbe 0,%1\n" | |
125 | " ipm %0\n" | |
a7e19ab5 DH |
126 | " srl %0,28\n" |
127 | : "=d" (cc) : "a" (addr) : "cc"); | |
128 | return cc; | |
2d42552d MS |
129 | } |
130 | ||
131 | /* Bits int the storage key */ | |
132 | #define _PAGE_CHANGED 0x02 /* HW changed bit */ | |
133 | #define _PAGE_REFERENCED 0x04 /* HW referenced bit */ | |
134 | #define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */ | |
135 | #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */ | |
136 | ||
45e576b1 MS |
137 | struct page; |
138 | void arch_free_page(struct page *page, int order); | |
139 | void arch_alloc_page(struct page *page, int order); | |
c9b5ad54 MS |
140 | void arch_set_page_dat(struct page *page, int order); |
141 | void arch_set_page_nodat(struct page *page, int order); | |
142 | int arch_test_page_nodat(struct page *page); | |
638ad34a | 143 | void arch_set_page_states(int make_stable); |
45e576b1 | 144 | |
ec6743bb HB |
145 | static inline int devmem_is_allowed(unsigned long pfn) |
146 | { | |
147 | return 0; | |
148 | } | |
149 | ||
45e576b1 MS |
150 | #define HAVE_ARCH_FREE_PAGE |
151 | #define HAVE_ARCH_ALLOC_PAGE | |
152 | ||
1da177e4 LT |
153 | #endif /* !__ASSEMBLY__ */ |
154 | ||
1da177e4 LT |
155 | #define __PAGE_OFFSET 0x0UL |
156 | #define PAGE_OFFSET 0x0UL | |
157 | #define __pa(x) (unsigned long)(x) | |
158 | #define __va(x) (void *)(unsigned long)(x) | |
1da177e4 | 159 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
0b2b6e1d | 160 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) |
1da177e4 | 161 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
3d84683b DH |
162 | #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) |
163 | #define page_to_virt(page) pfn_to_virt(page_to_pfn(page)) | |
1da177e4 | 164 | |
146e4b3c | 165 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ |
1da177e4 LT |
166 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
167 | ||
aed63043 | 168 | #include <asm-generic/memory_model.h> |
5b17e1cd | 169 | #include <asm-generic/getorder.h> |
fd4fd5aa | 170 | |
1da177e4 | 171 | #endif /* _S390_PAGE_H */ |