1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ALPHA_PAGE_H
3 #define _ALPHA_PAGE_H
4
5 #include <linux/const.h>
6 #include <asm/pal.h>
7
8 /* PAGE_SHIFT determines the page size */
9 #define PAGE_SHIFT CONFIG_PAGE_SHIFT
10 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
11 #define PAGE_MASK (~(PAGE_SIZE-1))
12
13 #ifndef __ASSEMBLY__
14
15 #define STRICT_MM_TYPECHECKS
16
17 extern void clear_page(void *page);
18 #define clear_user_page(page, vaddr, pg) clear_page(page)
19
20 #define vma_alloc_zeroed_movable_folio(vma, vaddr) \
21 vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
22
23 extern void copy_page(void * _to, void * _from);
24 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
25
26 #ifdef STRICT_MM_TYPECHECKS
27 /*
28 * These are used to make use of C type-checking..
29 */
30 typedef struct { unsigned long pte; } pte_t;
31 typedef struct { unsigned long pmd; } pmd_t;
32 typedef struct { unsigned long pgd; } pgd_t;
33 typedef struct { unsigned long pgprot; } pgprot_t;
34
35 #define pte_val(x) ((x).pte)
36 #define pmd_val(x) ((x).pmd)
37 #define pgd_val(x) ((x).pgd)
38 #define pgprot_val(x) ((x).pgprot)
39
40 #define __pte(x) ((pte_t) { (x) } )
41 #define __pmd(x) ((pmd_t) { (x) } )
42 #define __pgd(x) ((pgd_t) { (x) } )
43 #define __pgprot(x) ((pgprot_t) { (x) } )
44
45 #else
46 /*
47 * .. while these make it easier on the compiler
48 */
49 typedef unsigned long pte_t;
50 typedef unsigned long pmd_t;
51 typedef unsigned long pgd_t;
52 typedef unsigned long pgprot_t;
53
54 #define pte_val(x) (x)
55 #define pmd_val(x) (x)
56 #define pgd_val(x) (x)
57 #define pgprot_val(x) (x)
58
59 #define __pte(x) (x)
60 #define __pgd(x) (x)
61 #define __pgprot(x) (x)
62
63 #endif /* STRICT_MM_TYPECHECKS */
64
65 typedef struct page *pgtable_t;
66
67 #ifdef USE_48_BIT_KSEG
68 #define PAGE_OFFSET 0xffff800000000000UL
69 #else
70 #define PAGE_OFFSET 0xfffffc0000000000UL
71 #endif
72
73 #else
74
75 #ifdef USE_48_BIT_KSEG
76 #define PAGE_OFFSET 0xffff800000000000
77 #else
78 #define PAGE_OFFSET 0xfffffc0000000000
79 #endif
80
81 #endif /* !__ASSEMBLY__ */
82
83 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
84 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
85
86 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
87 #define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
88
89 #include <asm-generic/memory_model.h>
90 #include <asm-generic/getorder.h>
91
92 #endif /* _ALPHA_PAGE_H */
93
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