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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 | 2 | /* |
1da177e4 | 3 | * S390 version |
a53c8fab | 4 | * Copyright IBM Corp. 1999, 2000 |
1da177e4 LT |
5 | * Author(s): Hartmut Penner (hp@de.ibm.com) |
6 | */ | |
7 | ||
8 | #ifndef _S390_PAGE_H | |
9 | #define _S390_PAGE_H | |
10 | ||
52480ee5 | 11 | #include <linux/const.h> |
1da177e4 LT |
12 | #include <asm/types.h> |
13 | ||
c67da7c7 HC |
14 | #define _PAGE_SHIFT 12 |
15 | #define _PAGE_SIZE (_AC(1, UL) << _PAGE_SHIFT) | |
16 | #define _PAGE_MASK (~(_PAGE_SIZE - 1)) | |
17 | ||
1da177e4 | 18 | /* PAGE_SHIFT determines the page size */ |
c67da7c7 HC |
19 | #define PAGE_SHIFT _PAGE_SHIFT |
20 | #define PAGE_SIZE _PAGE_SIZE | |
21 | #define PAGE_MASK _PAGE_MASK | |
0b642ede PO |
22 | #define PAGE_DEFAULT_ACC 0 |
23 | #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) | |
1da177e4 | 24 | |
41318bfe | 25 | #define HPAGE_SHIFT 20 |
53492b1d GS |
26 | #define HPAGE_SIZE (1UL << HPAGE_SHIFT) |
27 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
28 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
d08de8e2 | 29 | #define HUGE_MAX_HSTATE 2 |
53492b1d GS |
30 | |
31 | #define ARCH_HAS_SETCLEAR_HUGE_PTE | |
32 | #define ARCH_HAS_HUGE_PTE_TYPE | |
33 | #define ARCH_HAS_PREPARE_HUGEPAGE | |
34 | #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH | |
35 | ||
41318bfe DD |
36 | #include <asm/setup.h> |
37 | #ifndef __ASSEMBLY__ | |
38 | ||
de3fa841 HC |
39 | void __storage_key_init_range(unsigned long start, unsigned long end); |
40 | ||
127c1fef MS |
41 | static inline void storage_key_init_range(unsigned long start, unsigned long end) |
42 | { | |
de3fa841 HC |
43 | if (PAGE_DEFAULT_KEY) |
44 | __storage_key_init_range(start, end); | |
127c1fef | 45 | } |
6b70a920 | 46 | |
fb3d1c08 | 47 | #define clear_page(page) memset((page), 0, PAGE_SIZE) |
1da177e4 | 48 | |
dba6bb60 HC |
49 | /* |
50 | * copy_page uses the mvcl instruction with 0xb0 padding byte in order to | |
51 | * bypass caches when copying a page. Especially when copying huge pages | |
52 | * this keeps L1 and L2 data caches alive. | |
53 | */ | |
1da177e4 LT |
54 | static inline void copy_page(void *to, void *from) |
55 | { | |
dba6bb60 HC |
56 | register void *reg2 asm ("2") = to; |
57 | register unsigned long reg3 asm ("3") = 0x1000; | |
58 | register void *reg4 asm ("4") = from; | |
59 | register unsigned long reg5 asm ("5") = 0xb0001000; | |
60 | asm volatile( | |
61 | " mvcl 2,4" | |
62 | : "+d" (reg2), "+d" (reg3), "+d" (reg4), "+d" (reg5) | |
63 | : : "memory", "cc"); | |
1da177e4 LT |
64 | } |
65 | ||
1da177e4 LT |
66 | #define clear_user_page(page, vaddr, pg) clear_page(page) |
67 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
68 | ||
769848c0 MG |
69 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ |
70 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) | |
1da177e4 LT |
71 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE |
72 | ||
1da177e4 LT |
73 | /* |
74 | * These are used to make use of C type-checking.. | |
75 | */ | |
76 | ||
77 | typedef struct { unsigned long pgprot; } pgprot_t; | |
b2fa47e6 | 78 | typedef struct { unsigned long pgste; } pgste_t; |
1da177e4 | 79 | typedef struct { unsigned long pte; } pte_t; |
1da177e4 | 80 | typedef struct { unsigned long pmd; } pmd_t; |
190a1d72 | 81 | typedef struct { unsigned long pud; } pud_t; |
1aea9b3f | 82 | typedef struct { unsigned long p4d; } p4d_t; |
1da177e4 | 83 | typedef struct { unsigned long pgd; } pgd_t; |
146e4b3c | 84 | typedef pte_t *pgtable_t; |
1da177e4 | 85 | |
146e4b3c | 86 | #define pgprot_val(x) ((x).pgprot) |
b2fa47e6 | 87 | #define pgste_val(x) ((x).pgste) |
146e4b3c MS |
88 | #define pte_val(x) ((x).pte) |
89 | #define pmd_val(x) ((x).pmd) | |
190a1d72 | 90 | #define pud_val(x) ((x).pud) |
1aea9b3f | 91 | #define p4d_val(x) ((x).p4d) |
1da177e4 LT |
92 | #define pgd_val(x) ((x).pgd) |
93 | ||
b2fa47e6 | 94 | #define __pgste(x) ((pgste_t) { (x) } ) |
1da177e4 LT |
95 | #define __pte(x) ((pte_t) { (x) } ) |
96 | #define __pmd(x) ((pmd_t) { (x) } ) | |
b2fa47e6 | 97 | #define __pud(x) ((pud_t) { (x) } ) |
1aea9b3f | 98 | #define __p4d(x) ((p4d_t) { (x) } ) |
1da177e4 LT |
99 | #define __pgd(x) ((pgd_t) { (x) } ) |
100 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
101 | ||
2d42552d MS |
102 | static inline void page_set_storage_key(unsigned long addr, |
103 | unsigned char skey, int mapped) | |
1da177e4 | 104 | { |
e2b8d7af MS |
105 | if (!mapped) |
106 | asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0" | |
107 | : : "d" (skey), "a" (addr)); | |
108 | else | |
109 | asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); | |
1da177e4 LT |
110 | } |
111 | ||
2d42552d | 112 | static inline unsigned char page_get_storage_key(unsigned long addr) |
1da177e4 | 113 | { |
2d42552d | 114 | unsigned char skey; |
1da177e4 | 115 | |
2d42552d | 116 | asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr)); |
1da177e4 LT |
117 | return skey; |
118 | } | |
119 | ||
2d42552d MS |
120 | static inline int page_reset_referenced(unsigned long addr) |
121 | { | |
a7e19ab5 | 122 | int cc; |
2d42552d MS |
123 | |
124 | asm volatile( | |
125 | " rrbe 0,%1\n" | |
126 | " ipm %0\n" | |
a7e19ab5 DH |
127 | " srl %0,28\n" |
128 | : "=d" (cc) : "a" (addr) : "cc"); | |
129 | return cc; | |
2d42552d MS |
130 | } |
131 | ||
132 | /* Bits int the storage key */ | |
133 | #define _PAGE_CHANGED 0x02 /* HW changed bit */ | |
134 | #define _PAGE_REFERENCED 0x04 /* HW referenced bit */ | |
135 | #define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */ | |
136 | #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */ | |
137 | ||
45e576b1 MS |
138 | struct page; |
139 | void arch_free_page(struct page *page, int order); | |
140 | void arch_alloc_page(struct page *page, int order); | |
c9b5ad54 MS |
141 | void arch_set_page_dat(struct page *page, int order); |
142 | void arch_set_page_nodat(struct page *page, int order); | |
143 | int arch_test_page_nodat(struct page *page); | |
638ad34a | 144 | void arch_set_page_states(int make_stable); |
45e576b1 | 145 | |
ec6743bb HB |
146 | static inline int devmem_is_allowed(unsigned long pfn) |
147 | { | |
148 | return 0; | |
149 | } | |
150 | ||
45e576b1 MS |
151 | #define HAVE_ARCH_FREE_PAGE |
152 | #define HAVE_ARCH_ALLOC_PAGE | |
153 | ||
1da177e4 LT |
154 | #endif /* !__ASSEMBLY__ */ |
155 | ||
16f48641 HC |
156 | #define __PAGE_OFFSET 0x0UL |
157 | #define PAGE_OFFSET 0x0UL | |
158 | ||
159 | #define __pa(x) ((unsigned long)(x)) | |
160 | #define __va(x) ((void *)(unsigned long)(x)) | |
161 | ||
162 | #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) | |
3d84683b | 163 | #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) |
16f48641 HC |
164 | |
165 | #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) | |
3d84683b | 166 | #define page_to_virt(page) pfn_to_virt(page_to_pfn(page)) |
1da177e4 | 167 | |
16f48641 HC |
168 | #define phys_to_pfn(kaddr) ((kaddr) >> PAGE_SHIFT) |
169 | #define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT) | |
170 | ||
171 | #define phys_to_page(kaddr) pfn_to_page(phys_to_pfn(kaddr)) | |
172 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) | |
173 | ||
174 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
175 | ||
146e4b3c | 176 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ |
1da177e4 LT |
177 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
178 | ||
aed63043 | 179 | #include <asm-generic/memory_model.h> |
5b17e1cd | 180 | #include <asm-generic/getorder.h> |
fd4fd5aa | 181 | |
1da177e4 | 182 | #endif /* _S390_PAGE_H */ |