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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * S390 version
4 * Copyright IBM Corp. 1999, 2000
5 * Author(s): Hartmut Penner (hp@de.ibm.com)
6 */
7
8#ifndef _S390_PAGE_H
9#define _S390_PAGE_H
10
11#include <linux/const.h>
12#include <asm/types.h>
13
14#define _PAGE_SHIFT 12
15#define _PAGE_SIZE (_AC(1, UL) << _PAGE_SHIFT)
16#define _PAGE_MASK (~(_PAGE_SIZE - 1))
17
18/* PAGE_SHIFT determines the page size */
19#define PAGE_SHIFT _PAGE_SHIFT
20#define PAGE_SIZE _PAGE_SIZE
21#define PAGE_MASK _PAGE_MASK
22#define PAGE_DEFAULT_ACC 0
23/* storage-protection override */
24#define PAGE_SPO_ACC 9
25#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
26
27#define HPAGE_SHIFT 20
28#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
29#define HPAGE_MASK (~(HPAGE_SIZE - 1))
30#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
31#define HUGE_MAX_HSTATE 2
32
33#define ARCH_HAS_SETCLEAR_HUGE_PTE
34#define ARCH_HAS_HUGE_PTE_TYPE
35#define ARCH_HAS_PREPARE_HUGEPAGE
36#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
37
38#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
39
40#include <asm/setup.h>
41#ifndef __ASSEMBLY__
42
43void __storage_key_init_range(unsigned long start, unsigned long end);
44
45static inline void storage_key_init_range(unsigned long start, unsigned long end)
46{
47 if (PAGE_DEFAULT_KEY != 0)
48 __storage_key_init_range(start, end);
49}
50
51#define clear_page(page) memset((page), 0, PAGE_SIZE)
52
53/*
54 * copy_page uses the mvcl instruction with 0xb0 padding byte in order to
55 * bypass caches when copying a page. Especially when copying huge pages
56 * this keeps L1 and L2 data caches alive.
57 */
58static inline void copy_page(void *to, void *from)
59{
60 union register_pair dst, src;
61
62 dst.even = (unsigned long) to;
63 dst.odd = 0x1000;
64 src.even = (unsigned long) from;
65 src.odd = 0xb0001000;
66
67 asm volatile(
68 " mvcl %[dst],%[src]"
69 : [dst] "+&d" (dst.pair), [src] "+&d" (src.pair)
70 : : "memory", "cc");
71}
72
73#define clear_user_page(page, vaddr, pg) clear_page(page)
74#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
75
76#define alloc_zeroed_user_highpage_movable(vma, vaddr) \
77 alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
78#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
79
80/*
81 * These are used to make use of C type-checking..
82 */
83
84typedef struct { unsigned long pgprot; } pgprot_t;
85typedef struct { unsigned long pgste; } pgste_t;
86typedef struct { unsigned long pte; } pte_t;
87typedef struct { unsigned long pmd; } pmd_t;
88typedef struct { unsigned long pud; } pud_t;
89typedef struct { unsigned long p4d; } p4d_t;
90typedef struct { unsigned long pgd; } pgd_t;
91typedef pte_t *pgtable_t;
92
93#define pgprot_val(x) ((x).pgprot)
94#define pgste_val(x) ((x).pgste)
95
96static inline unsigned long pte_val(pte_t pte)
97{
98 return pte.pte;
99}
100
101static inline unsigned long pmd_val(pmd_t pmd)
102{
103 return pmd.pmd;
104}
105
106static inline unsigned long pud_val(pud_t pud)
107{
108 return pud.pud;
109}
110
111static inline unsigned long p4d_val(p4d_t p4d)
112{
113 return p4d.p4d;
114}
115
116static inline unsigned long pgd_val(pgd_t pgd)
117{
118 return pgd.pgd;
119}
120
121#define __pgste(x) ((pgste_t) { (x) } )
122#define __pte(x) ((pte_t) { (x) } )
123#define __pmd(x) ((pmd_t) { (x) } )
124#define __pud(x) ((pud_t) { (x) } )
125#define __p4d(x) ((p4d_t) { (x) } )
126#define __pgd(x) ((pgd_t) { (x) } )
127#define __pgprot(x) ((pgprot_t) { (x) } )
128
129static inline void page_set_storage_key(unsigned long addr,
130 unsigned char skey, int mapped)
131{
132 if (!mapped)
133 asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0"
134 : : "d" (skey), "a" (addr));
135 else
136 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
137}
138
139static inline unsigned char page_get_storage_key(unsigned long addr)
140{
141 unsigned char skey;
142
143 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr));
144 return skey;
145}
146
147static inline int page_reset_referenced(unsigned long addr)
148{
149 int cc;
150
151 asm volatile(
152 " rrbe 0,%1\n"
153 " ipm %0\n"
154 " srl %0,28\n"
155 : "=d" (cc) : "a" (addr) : "cc");
156 return cc;
157}
158
159/* Bits int the storage key */
160#define _PAGE_CHANGED 0x02 /* HW changed bit */
161#define _PAGE_REFERENCED 0x04 /* HW referenced bit */
162#define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */
163#define _PAGE_ACC_BITS 0xf0 /* HW access control bits */
164
165struct page;
166void arch_free_page(struct page *page, int order);
167void arch_alloc_page(struct page *page, int order);
168void arch_set_page_dat(struct page *page, int order);
169
170static inline int devmem_is_allowed(unsigned long pfn)
171{
172 return 0;
173}
174
175#define HAVE_ARCH_FREE_PAGE
176#define HAVE_ARCH_ALLOC_PAGE
177
178#if IS_ENABLED(CONFIG_PGSTE)
179int arch_make_page_accessible(struct page *page);
180#define HAVE_ARCH_MAKE_PAGE_ACCESSIBLE
181#endif
182
183#endif /* !__ASSEMBLY__ */
184
185#define __PAGE_OFFSET 0x0UL
186#define PAGE_OFFSET 0x0UL
187
188#define __pa(x) ((unsigned long)(x))
189#define __va(x) ((void *)(unsigned long)(x))
190
191#define phys_to_pfn(phys) ((phys) >> PAGE_SHIFT)
192#define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
193
194#define phys_to_page(phys) pfn_to_page(phys_to_pfn(phys))
195#define page_to_phys(page) pfn_to_phys(page_to_pfn(page))
196
197#define pfn_to_virt(pfn) __va(pfn_to_phys(pfn))
198#define virt_to_pfn(kaddr) (phys_to_pfn(__pa(kaddr)))
199#define pfn_to_kaddr(pfn) pfn_to_virt(pfn)
200
201#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
202#define page_to_virt(page) pfn_to_virt(page_to_pfn(page))
203
204#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
205
206#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
207
208#include <asm-generic/memory_model.h>
209#include <asm-generic/getorder.h>
210
211#endif /* _S390_PAGE_H */
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * S390 version
4 * Copyright IBM Corp. 1999, 2000
5 * Author(s): Hartmut Penner (hp@de.ibm.com)
6 */
7
8#ifndef _S390_PAGE_H
9#define _S390_PAGE_H
10
11#include <linux/const.h>
12#include <asm/types.h>
13
14#define _PAGE_SHIFT 12
15#define _PAGE_SIZE (_AC(1, UL) << _PAGE_SHIFT)
16#define _PAGE_MASK (~(_PAGE_SIZE - 1))
17
18/* PAGE_SHIFT determines the page size */
19#define PAGE_SHIFT _PAGE_SHIFT
20#define PAGE_SIZE _PAGE_SIZE
21#define PAGE_MASK _PAGE_MASK
22#define PAGE_DEFAULT_ACC _AC(0, UL)
23/* storage-protection override */
24#define PAGE_SPO_ACC 9
25#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
26
27#define HPAGE_SHIFT 20
28#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
29#define HPAGE_MASK (~(HPAGE_SIZE - 1))
30#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
31#define HUGE_MAX_HSTATE 2
32
33#define ARCH_HAS_SETCLEAR_HUGE_PTE
34#define ARCH_HAS_HUGE_PTE_TYPE
35#define ARCH_HAS_PREPARE_HUGEPAGE
36#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
37
38#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
39
40#include <asm/setup.h>
41#ifndef __ASSEMBLY__
42
43void __storage_key_init_range(unsigned long start, unsigned long end);
44
45static inline void storage_key_init_range(unsigned long start, unsigned long end)
46{
47 if (PAGE_DEFAULT_KEY != 0)
48 __storage_key_init_range(start, end);
49}
50
51#define clear_page(page) memset((page), 0, PAGE_SIZE)
52
53/*
54 * copy_page uses the mvcl instruction with 0xb0 padding byte in order to
55 * bypass caches when copying a page. Especially when copying huge pages
56 * this keeps L1 and L2 data caches alive.
57 */
58static inline void copy_page(void *to, void *from)
59{
60 union register_pair dst, src;
61
62 dst.even = (unsigned long) to;
63 dst.odd = 0x1000;
64 src.even = (unsigned long) from;
65 src.odd = 0xb0001000;
66
67 asm volatile(
68 " mvcl %[dst],%[src]"
69 : [dst] "+&d" (dst.pair), [src] "+&d" (src.pair)
70 : : "memory", "cc");
71}
72
73#define clear_user_page(page, vaddr, pg) clear_page(page)
74#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
75
76#define vma_alloc_zeroed_movable_folio(vma, vaddr) \
77 vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
78
79/*
80 * These are used to make use of C type-checking..
81 */
82
83typedef struct { unsigned long pgprot; } pgprot_t;
84typedef struct { unsigned long pgste; } pgste_t;
85typedef struct { unsigned long pte; } pte_t;
86typedef struct { unsigned long pmd; } pmd_t;
87typedef struct { unsigned long pud; } pud_t;
88typedef struct { unsigned long p4d; } p4d_t;
89typedef struct { unsigned long pgd; } pgd_t;
90typedef pte_t *pgtable_t;
91
92#define pgprot_val(x) ((x).pgprot)
93#define pgste_val(x) ((x).pgste)
94
95static inline unsigned long pte_val(pte_t pte)
96{
97 return pte.pte;
98}
99
100static inline unsigned long pmd_val(pmd_t pmd)
101{
102 return pmd.pmd;
103}
104
105static inline unsigned long pud_val(pud_t pud)
106{
107 return pud.pud;
108}
109
110static inline unsigned long p4d_val(p4d_t p4d)
111{
112 return p4d.p4d;
113}
114
115static inline unsigned long pgd_val(pgd_t pgd)
116{
117 return pgd.pgd;
118}
119
120#define __pgste(x) ((pgste_t) { (x) } )
121#define __pte(x) ((pte_t) { (x) } )
122#define __pmd(x) ((pmd_t) { (x) } )
123#define __pud(x) ((pud_t) { (x) } )
124#define __p4d(x) ((p4d_t) { (x) } )
125#define __pgd(x) ((pgd_t) { (x) } )
126#define __pgprot(x) ((pgprot_t) { (x) } )
127
128static inline void page_set_storage_key(unsigned long addr,
129 unsigned char skey, int mapped)
130{
131 if (!mapped)
132 asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0"
133 : : "d" (skey), "a" (addr));
134 else
135 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
136}
137
138static inline unsigned char page_get_storage_key(unsigned long addr)
139{
140 unsigned char skey;
141
142 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr));
143 return skey;
144}
145
146static inline int page_reset_referenced(unsigned long addr)
147{
148 int cc;
149
150 asm volatile(
151 " rrbe 0,%1\n"
152 " ipm %0\n"
153 " srl %0,28\n"
154 : "=d" (cc) : "a" (addr) : "cc");
155 return cc;
156}
157
158/* Bits int the storage key */
159#define _PAGE_CHANGED 0x02 /* HW changed bit */
160#define _PAGE_REFERENCED 0x04 /* HW referenced bit */
161#define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */
162#define _PAGE_ACC_BITS 0xf0 /* HW access control bits */
163
164struct page;
165void arch_free_page(struct page *page, int order);
166void arch_alloc_page(struct page *page, int order);
167
168static inline int devmem_is_allowed(unsigned long pfn)
169{
170 return 0;
171}
172
173#define HAVE_ARCH_FREE_PAGE
174#define HAVE_ARCH_ALLOC_PAGE
175
176#if IS_ENABLED(CONFIG_PGSTE)
177int arch_make_page_accessible(struct page *page);
178#define HAVE_ARCH_MAKE_PAGE_ACCESSIBLE
179#endif
180
181#define __PAGE_OFFSET 0x0UL
182#define PAGE_OFFSET 0x0UL
183
184#define __pa(x) ((unsigned long)(x))
185#define __va(x) ((void *)(unsigned long)(x))
186
187#define phys_to_pfn(phys) ((phys) >> PAGE_SHIFT)
188#define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
189
190#define phys_to_page(phys) pfn_to_page(phys_to_pfn(phys))
191#define page_to_phys(page) pfn_to_phys(page_to_pfn(page))
192
193static inline void *pfn_to_virt(unsigned long pfn)
194{
195 return __va(pfn_to_phys(pfn));
196}
197
198static inline unsigned long virt_to_pfn(const void *kaddr)
199{
200 return phys_to_pfn(__pa(kaddr));
201}
202
203#define pfn_to_kaddr(pfn) pfn_to_virt(pfn)
204
205#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
206#define page_to_virt(page) pfn_to_virt(page_to_pfn(page))
207
208#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
209
210#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
211
212#endif /* !__ASSEMBLY__ */
213
214#include <asm-generic/memory_model.h>
215#include <asm-generic/getorder.h>
216
217#endif /* _S390_PAGE_H */