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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_SCORE_PAGE_H
3#define _ASM_SCORE_PAGE_H
4
5#include <linux/pfn.h>
6#include <linux/const.h>
7
8/* PAGE_SHIFT determines the page size */
9#define PAGE_SHIFT (12)
10#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
11#define PAGE_MASK (~(PAGE_SIZE-1))
12
13#ifdef __KERNEL__
14
15#ifndef __ASSEMBLY__
16
17#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
18#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
19
20/* align addr on a size boundary - adjust address up/down if needed */
21#define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1)))
22#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
23
24/* align addr on a size boundary - adjust address up if needed */
25#define _ALIGN(addr, size) _ALIGN_UP(addr, size)
26
27/*
28 * PAGE_OFFSET -- the first address of the first page of memory. When not
29 * using MMU this corresponds to the first free page in physical memory (aligned
30 * on a page boundary).
31 */
32#define PAGE_OFFSET (0xA0000000UL)
33
34#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
35#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
36
37#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
38#define copy_user_page(vto, vfrom, vaddr, topg) \
39 memcpy((vto), (vfrom), PAGE_SIZE)
40
41/*
42 * These are used to make use of C type-checking..
43 */
44
45typedef struct { unsigned long pte; } pte_t; /* page table entry */
46typedef struct { unsigned long pgd; } pgd_t; /* PGD table entry */
47typedef struct { unsigned long pgprot; } pgprot_t;
48typedef struct page *pgtable_t;
49
50#define pte_val(x) ((x).pte)
51#define pgd_val(x) ((x).pgd)
52#define pgprot_val(x) ((x).pgprot)
53
54#define __pte(x) ((pte_t) { (x) })
55#define __pgd(x) ((pgd_t) { (x) })
56#define __pgprot(x) ((pgprot_t) { (x) })
57
58extern unsigned long max_low_pfn;
59extern unsigned long min_low_pfn;
60extern unsigned long max_pfn;
61
62#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
63#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
64
65#define phys_to_pfn(phys) (PFN_DOWN(phys))
66#define pfn_to_phys(pfn) (PFN_PHYS(pfn))
67
68#define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr))))
69#define pfn_to_virt(pfn) __va(pfn_to_phys((pfn)))
70
71#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
72#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
73
74#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
75#define page_to_bus(page) (page_to_phys(page))
76#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
77
78#define pfn_valid(pfn) (((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn))
79
80#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
81
82#endif /* __ASSEMBLY__ */
83
84#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
85
86#endif /* __KERNEL__ */
87
88#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
89 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
90
91#include <asm-generic/memory_model.h>
92#include <asm-generic/getorder.h>
93
94#endif /* _ASM_SCORE_PAGE_H */