1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/const.h>
11 #define STRICT_MM_TYPECHECKS
13 extern void clear_page(void *page);
14 #define clear_user_page(page, vaddr, pg) clear_page(page)
16 #define vma_alloc_zeroed_movable_folio(vma, vaddr) \
17 vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr)
19 extern void copy_page(void * _to, void * _from);
20 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
22 #ifdef STRICT_MM_TYPECHECKS
24 * These are used to make use of C type-checking..
26 typedef struct { unsigned long pte; } pte_t;
27 typedef struct { unsigned long pmd; } pmd_t;
28 typedef struct { unsigned long pgd; } pgd_t;
29 typedef struct { unsigned long pgprot; } pgprot_t;
31 #define pte_val(x) ((x).pte)
32 #define pmd_val(x) ((x).pmd)
33 #define pgd_val(x) ((x).pgd)
34 #define pgprot_val(x) ((x).pgprot)
36 #define __pte(x) ((pte_t) { (x) } )
37 #define __pmd(x) ((pmd_t) { (x) } )
38 #define __pgd(x) ((pgd_t) { (x) } )
39 #define __pgprot(x) ((pgprot_t) { (x) } )
43 * .. while these make it easier on the compiler
45 typedef unsigned long pte_t;
46 typedef unsigned long pmd_t;
47 typedef unsigned long pgd_t;
48 typedef unsigned long pgprot_t;
50 #define pte_val(x) (x)
51 #define pmd_val(x) (x)
52 #define pgd_val(x) (x)
53 #define pgprot_val(x) (x)
57 #define __pgprot(x) (x)
59 #endif /* STRICT_MM_TYPECHECKS */
61 typedef struct page *pgtable_t;
63 #ifdef USE_48_BIT_KSEG
64 #define PAGE_OFFSET 0xffff800000000000UL
66 #define PAGE_OFFSET 0xfffffc0000000000UL
71 #ifdef USE_48_BIT_KSEG
72 #define PAGE_OFFSET 0xffff800000000000
74 #define PAGE_OFFSET 0xfffffc0000000000
77 #endif /* !__ASSEMBLY__ */
79 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
80 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
82 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
83 #define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
85 #include <asm-generic/memory_model.h>
86 #include <asm-generic/getorder.h>
88 #endif /* _ALPHA_PAGE_H */