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
17extern 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
23extern 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 */
30typedef struct { unsigned long pte; } pte_t;
31typedef struct { unsigned long pmd; } pmd_t;
32typedef struct { unsigned long pgd; } pgd_t;
33typedef 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 */
49typedef unsigned long pte_t;
50typedef unsigned long pmd_t;
51typedef unsigned long pgd_t;
52typedef 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
65typedef 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