Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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#include <vdso/page.h>
8
9#ifndef __ASSEMBLER__
10
11#define STRICT_MM_TYPECHECKS
12
13extern void clear_page(void *page);
14#define clear_user_page(page, vaddr, pg) clear_page(page)
15
16#define vma_alloc_zeroed_movable_folio(vma, vaddr) \
17 vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr)
18
19extern void copy_page(void * _to, void * _from);
20#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
21
22#ifdef STRICT_MM_TYPECHECKS
23/*
24 * These are used to make use of C type-checking..
25 */
26typedef struct { unsigned long pte; } pte_t;
27typedef struct { unsigned long pmd; } pmd_t;
28typedef struct { unsigned long pgd; } pgd_t;
29typedef struct { unsigned long pgprot; } pgprot_t;
30
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)
35
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) } )
40
41#else
42/*
43 * .. while these make it easier on the compiler
44 */
45typedef unsigned long pte_t;
46typedef unsigned long pmd_t;
47typedef unsigned long pgd_t;
48typedef unsigned long pgprot_t;
49
50#define pte_val(x) (x)
51#define pmd_val(x) (x)
52#define pgd_val(x) (x)
53#define pgprot_val(x) (x)
54
55#define __pte(x) (x)
56#define __pgd(x) (x)
57#define __pgprot(x) (x)
58
59#endif /* STRICT_MM_TYPECHECKS */
60
61typedef struct page *pgtable_t;
62
63#ifdef USE_48_BIT_KSEG
64#define PAGE_OFFSET 0xffff800000000000UL
65#else
66#define PAGE_OFFSET 0xfffffc0000000000UL
67#endif
68
69#else
70
71#ifdef USE_48_BIT_KSEG
72#define PAGE_OFFSET 0xffff800000000000
73#else
74#define PAGE_OFFSET 0xfffffc0000000000
75#endif
76
77#endif /* !__ASSEMBLER__ */
78
79#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
80#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
81
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))
84
85#include <asm-generic/memory_model.h>
86#include <asm-generic/getorder.h>
87
88#endif /* _ALPHA_PAGE_H */