Commit | Line | Data |
---|---|---|
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 | ||
13 | /* PAGE_SHIFT determines the page size */ | |
14 | #define PAGE_SHIFT 12 | |
52480ee5 | 15 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
1da177e4 | 16 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
0b642ede PO |
17 | #define PAGE_DEFAULT_ACC 0 |
18 | #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) | |
1da177e4 | 19 | |
53492b1d GS |
20 | #define HPAGE_SHIFT 20 |
21 | #define HPAGE_SIZE (1UL << HPAGE_SHIFT) | |
22 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
23 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
24 | ||
25 | #define ARCH_HAS_SETCLEAR_HUGE_PTE | |
26 | #define ARCH_HAS_HUGE_PTE_TYPE | |
27 | #define ARCH_HAS_PREPARE_HUGEPAGE | |
28 | #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH | |
29 | ||
274f5946 | 30 | #include <asm/setup.h> |
1da177e4 LT |
31 | #ifndef __ASSEMBLY__ |
32 | ||
6b70a920 HC |
33 | void storage_key_init_range(unsigned long start, unsigned long end); |
34 | ||
85e9d0e5 HC |
35 | static unsigned long pfmf(unsigned long function, unsigned long address) |
36 | { | |
37 | asm volatile( | |
38 | " .insn rre,0xb9af0000,%[function],%[address]" | |
39 | : [address] "+a" (address) | |
40 | : [function] "d" (function) | |
41 | : "memory"); | |
42 | return address; | |
43 | } | |
44 | ||
1da177e4 LT |
45 | static inline void clear_page(void *page) |
46 | { | |
53492b1d | 47 | if (MACHINE_HAS_PFMF) { |
85e9d0e5 | 48 | pfmf(0x10000, (unsigned long)page); |
53492b1d GS |
49 | } else { |
50 | register unsigned long reg1 asm ("1") = 0; | |
51 | register void *reg2 asm ("2") = page; | |
52 | register unsigned long reg3 asm ("3") = 4096; | |
53 | asm volatile( | |
54 | " mvcl 2,0" | |
55 | : "+d" (reg2), "+d" (reg3) : "d" (reg1) | |
56 | : "memory", "cc"); | |
57 | } | |
1da177e4 LT |
58 | } |
59 | ||
60 | static inline void copy_page(void *to, void *from) | |
61 | { | |
94c12cc7 MS |
62 | if (MACHINE_HAS_MVPG) { |
63 | register unsigned long reg0 asm ("0") = 0; | |
64 | asm volatile( | |
65 | " mvpg %0,%1" | |
66 | : : "a" (to), "a" (from), "d" (reg0) | |
67 | : "memory", "cc"); | |
68 | } else | |
69 | asm volatile( | |
70 | " mvc 0(256,%0),0(%1)\n" | |
71 | " mvc 256(256,%0),256(%1)\n" | |
72 | " mvc 512(256,%0),512(%1)\n" | |
73 | " mvc 768(256,%0),768(%1)\n" | |
74 | " mvc 1024(256,%0),1024(%1)\n" | |
75 | " mvc 1280(256,%0),1280(%1)\n" | |
76 | " mvc 1536(256,%0),1536(%1)\n" | |
77 | " mvc 1792(256,%0),1792(%1)\n" | |
78 | " mvc 2048(256,%0),2048(%1)\n" | |
79 | " mvc 2304(256,%0),2304(%1)\n" | |
80 | " mvc 2560(256,%0),2560(%1)\n" | |
81 | " mvc 2816(256,%0),2816(%1)\n" | |
82 | " mvc 3072(256,%0),3072(%1)\n" | |
83 | " mvc 3328(256,%0),3328(%1)\n" | |
84 | " mvc 3584(256,%0),3584(%1)\n" | |
85 | " mvc 3840(256,%0),3840(%1)\n" | |
86 | : : "a" (to), "a" (from) : "memory"); | |
1da177e4 LT |
87 | } |
88 | ||
1da177e4 LT |
89 | #define clear_user_page(page, vaddr, pg) clear_page(page) |
90 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
91 | ||
769848c0 MG |
92 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ |
93 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) | |
1da177e4 LT |
94 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE |
95 | ||
1da177e4 LT |
96 | /* |
97 | * These are used to make use of C type-checking.. | |
98 | */ | |
99 | ||
100 | typedef struct { unsigned long pgprot; } pgprot_t; | |
b2fa47e6 | 101 | typedef struct { unsigned long pgste; } pgste_t; |
1da177e4 | 102 | typedef struct { unsigned long pte; } pte_t; |
1da177e4 | 103 | typedef struct { unsigned long pmd; } pmd_t; |
190a1d72 | 104 | typedef struct { unsigned long pud; } pud_t; |
1da177e4 | 105 | typedef struct { unsigned long pgd; } pgd_t; |
146e4b3c | 106 | typedef pte_t *pgtable_t; |
1da177e4 | 107 | |
146e4b3c | 108 | #define pgprot_val(x) ((x).pgprot) |
b2fa47e6 | 109 | #define pgste_val(x) ((x).pgste) |
146e4b3c MS |
110 | #define pte_val(x) ((x).pte) |
111 | #define pmd_val(x) ((x).pmd) | |
190a1d72 | 112 | #define pud_val(x) ((x).pud) |
1da177e4 LT |
113 | #define pgd_val(x) ((x).pgd) |
114 | ||
b2fa47e6 | 115 | #define __pgste(x) ((pgste_t) { (x) } ) |
1da177e4 LT |
116 | #define __pte(x) ((pte_t) { (x) } ) |
117 | #define __pmd(x) ((pmd_t) { (x) } ) | |
b2fa47e6 | 118 | #define __pud(x) ((pud_t) { (x) } ) |
1da177e4 LT |
119 | #define __pgd(x) ((pgd_t) { (x) } ) |
120 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
121 | ||
2d42552d MS |
122 | static inline void page_set_storage_key(unsigned long addr, |
123 | unsigned char skey, int mapped) | |
1da177e4 | 124 | { |
e2b8d7af MS |
125 | if (!mapped) |
126 | asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0" | |
127 | : : "d" (skey), "a" (addr)); | |
128 | else | |
129 | asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); | |
1da177e4 LT |
130 | } |
131 | ||
2d42552d | 132 | static inline unsigned char page_get_storage_key(unsigned long addr) |
1da177e4 | 133 | { |
2d42552d | 134 | unsigned char skey; |
1da177e4 | 135 | |
2d42552d | 136 | asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr)); |
1da177e4 LT |
137 | return skey; |
138 | } | |
139 | ||
2d42552d MS |
140 | static inline int page_reset_referenced(unsigned long addr) |
141 | { | |
142 | unsigned int ipm; | |
143 | ||
144 | asm volatile( | |
145 | " rrbe 0,%1\n" | |
146 | " ipm %0\n" | |
147 | : "=d" (ipm) : "a" (addr) : "cc"); | |
148 | return !!(ipm & 0x20000000); | |
149 | } | |
150 | ||
151 | /* Bits int the storage key */ | |
152 | #define _PAGE_CHANGED 0x02 /* HW changed bit */ | |
153 | #define _PAGE_REFERENCED 0x04 /* HW referenced bit */ | |
154 | #define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */ | |
155 | #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */ | |
156 | ||
2d42552d MS |
157 | /* |
158 | * Test and clear referenced bit in storage key. | |
159 | */ | |
160 | #define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_YOUNG | |
161 | static inline int page_test_and_clear_young(unsigned long pfn) | |
162 | { | |
163 | return page_reset_referenced(pfn << PAGE_SHIFT); | |
164 | } | |
165 | ||
45e576b1 MS |
166 | struct page; |
167 | void arch_free_page(struct page *page, int order); | |
168 | void arch_alloc_page(struct page *page, int order); | |
638ad34a | 169 | void arch_set_page_states(int make_stable); |
45e576b1 | 170 | |
ec6743bb HB |
171 | static inline int devmem_is_allowed(unsigned long pfn) |
172 | { | |
173 | return 0; | |
174 | } | |
175 | ||
45e576b1 MS |
176 | #define HAVE_ARCH_FREE_PAGE |
177 | #define HAVE_ARCH_ALLOC_PAGE | |
178 | ||
1da177e4 LT |
179 | #endif /* !__ASSEMBLY__ */ |
180 | ||
1da177e4 LT |
181 | #define __PAGE_OFFSET 0x0UL |
182 | #define PAGE_OFFSET 0x0UL | |
183 | #define __pa(x) (unsigned long)(x) | |
184 | #define __va(x) (void *)(unsigned long)(x) | |
1da177e4 | 185 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
0b2b6e1d | 186 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) |
1da177e4 LT |
187 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
188 | ||
146e4b3c | 189 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ |
1da177e4 LT |
190 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
191 | ||
aed63043 | 192 | #include <asm-generic/memory_model.h> |
5b17e1cd | 193 | #include <asm-generic/getorder.h> |
fd4fd5aa | 194 | |
b020632e MS |
195 | #define __HAVE_ARCH_GATE_AREA 1 |
196 | ||
1da177e4 | 197 | #endif /* _S390_PAGE_H */ |