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 | ||
127c1fef MS |
33 | static inline void storage_key_init_range(unsigned long start, unsigned long end) |
34 | { | |
35 | #if PAGE_DEFAULT_KEY | |
36 | __storage_key_init_range(start, end); | |
37 | #endif | |
38 | } | |
6b70a920 | 39 | |
1da177e4 LT |
40 | static inline void clear_page(void *page) |
41 | { | |
617e164c CB |
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"); | |
1da177e4 LT |
49 | } |
50 | ||
dba6bb60 HC |
51 | /* |
52 | * copy_page uses the mvcl instruction with 0xb0 padding byte in order to | |
53 | * bypass caches when copying a page. Especially when copying huge pages | |
54 | * this keeps L1 and L2 data caches alive. | |
55 | */ | |
1da177e4 LT |
56 | static inline void copy_page(void *to, void *from) |
57 | { | |
dba6bb60 HC |
58 | register void *reg2 asm ("2") = to; |
59 | register unsigned long reg3 asm ("3") = 0x1000; | |
60 | register void *reg4 asm ("4") = from; | |
61 | register unsigned long reg5 asm ("5") = 0xb0001000; | |
62 | asm volatile( | |
63 | " mvcl 2,4" | |
64 | : "+d" (reg2), "+d" (reg3), "+d" (reg4), "+d" (reg5) | |
65 | : : "memory", "cc"); | |
1da177e4 LT |
66 | } |
67 | ||
1da177e4 LT |
68 | #define clear_user_page(page, vaddr, pg) clear_page(page) |
69 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
70 | ||
769848c0 MG |
71 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ |
72 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) | |
1da177e4 LT |
73 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE |
74 | ||
1da177e4 LT |
75 | /* |
76 | * These are used to make use of C type-checking.. | |
77 | */ | |
78 | ||
79 | typedef struct { unsigned long pgprot; } pgprot_t; | |
b2fa47e6 | 80 | typedef struct { unsigned long pgste; } pgste_t; |
1da177e4 | 81 | typedef struct { unsigned long pte; } pte_t; |
1da177e4 | 82 | typedef struct { unsigned long pmd; } pmd_t; |
190a1d72 | 83 | typedef struct { unsigned long pud; } pud_t; |
1da177e4 | 84 | typedef struct { unsigned long pgd; } pgd_t; |
146e4b3c | 85 | typedef pte_t *pgtable_t; |
1da177e4 | 86 | |
146e4b3c | 87 | #define pgprot_val(x) ((x).pgprot) |
b2fa47e6 | 88 | #define pgste_val(x) ((x).pgste) |
146e4b3c MS |
89 | #define pte_val(x) ((x).pte) |
90 | #define pmd_val(x) ((x).pmd) | |
190a1d72 | 91 | #define pud_val(x) ((x).pud) |
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) } ) |
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 | { | |
121 | unsigned int ipm; | |
122 | ||
123 | asm volatile( | |
124 | " rrbe 0,%1\n" | |
125 | " ipm %0\n" | |
126 | : "=d" (ipm) : "a" (addr) : "cc"); | |
127 | return !!(ipm & 0x20000000); | |
128 | } | |
129 | ||
130 | /* Bits int the storage key */ | |
131 | #define _PAGE_CHANGED 0x02 /* HW changed bit */ | |
132 | #define _PAGE_REFERENCED 0x04 /* HW referenced bit */ | |
133 | #define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */ | |
134 | #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */ | |
135 | ||
45e576b1 MS |
136 | struct page; |
137 | void arch_free_page(struct page *page, int order); | |
138 | void arch_alloc_page(struct page *page, int order); | |
638ad34a | 139 | void arch_set_page_states(int make_stable); |
45e576b1 | 140 | |
ec6743bb HB |
141 | static inline int devmem_is_allowed(unsigned long pfn) |
142 | { | |
143 | return 0; | |
144 | } | |
145 | ||
45e576b1 MS |
146 | #define HAVE_ARCH_FREE_PAGE |
147 | #define HAVE_ARCH_ALLOC_PAGE | |
148 | ||
1da177e4 LT |
149 | #endif /* !__ASSEMBLY__ */ |
150 | ||
1da177e4 LT |
151 | #define __PAGE_OFFSET 0x0UL |
152 | #define PAGE_OFFSET 0x0UL | |
153 | #define __pa(x) (unsigned long)(x) | |
154 | #define __va(x) (void *)(unsigned long)(x) | |
1da177e4 | 155 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
0b2b6e1d | 156 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) |
1da177e4 LT |
157 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
158 | ||
146e4b3c | 159 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ |
1da177e4 LT |
160 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
161 | ||
aed63043 | 162 | #include <asm-generic/memory_model.h> |
5b17e1cd | 163 | #include <asm-generic/getorder.h> |
fd4fd5aa | 164 | |
b020632e MS |
165 | #define __HAVE_ARCH_GATE_AREA 1 |
166 | ||
1da177e4 | 167 | #endif /* _S390_PAGE_H */ |