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1/*
2 * OpenRISC Linux
3 *
4 * Linux architectural port borrowing liberally from similar works of
5 * others. All original copyrights apply as per the original source
6 * declaration.
7 *
8 * OpenRISC implementation:
9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
11 * et al.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 */
18
19#ifndef __ASM_OPENRISC_PAGE_H
20#define __ASM_OPENRISC_PAGE_H
21
22
23/* PAGE_SHIFT determines the page size */
24
25#define PAGE_SHIFT 13
26#ifdef __ASSEMBLY__
27#define PAGE_SIZE (1 << PAGE_SHIFT)
28#else
29#define PAGE_SIZE (1UL << PAGE_SHIFT)
30#endif
31#define PAGE_MASK (~(PAGE_SIZE-1))
32
33#define PAGE_OFFSET 0xc0000000
34#define KERNELBASE PAGE_OFFSET
35
36/* This is not necessarily the right place for this, but it's needed by
37 * drivers/of/fdt.c
38 */
39#include <asm/setup.h>
40
41#ifndef __ASSEMBLY__
42
43#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
44#define free_user_page(page, addr) free_page(addr)
45
46#define clear_page(page) memset((page), 0, PAGE_SIZE)
47#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
48
49#define clear_user_page(page, vaddr, pg) clear_page(page)
50#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
51
52/*
53 * These are used to make use of C type-checking..
54 */
55typedef struct {
56 unsigned long pte;
57} pte_t;
58typedef struct {
59 unsigned long pgd;
60} pgd_t;
61typedef struct {
62 unsigned long pgprot;
63} pgprot_t;
64typedef struct page *pgtable_t;
65
66#define pte_val(x) ((x).pte)
67#define pgd_val(x) ((x).pgd)
68#define pgprot_val(x) ((x).pgprot)
69
70#define __pte(x) ((pte_t) { (x) })
71#define __pgd(x) ((pgd_t) { (x) })
72#define __pgprot(x) ((pgprot_t) { (x) })
73
74extern unsigned long memory_start;
75extern unsigned long memory_end;
76
77#endif /* !__ASSEMBLY__ */
78
79
80#ifndef __ASSEMBLY__
81
82#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
83#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
84
85#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
86#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
87
88#define virt_to_page(addr) \
89 (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
90#define page_to_virt(page) \
91 ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
92
93#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
94
95#define pfn_valid(pfn) ((pfn) < max_mapnr)
96
97#define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
98 ((void *)(kaddr) < (void *)memory_end))
99
100#endif /* __ASSEMBLY__ */
101
102
103#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
104 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
105
106
107#include <asm-generic/memory_model.h>
108#include <asm-generic/getorder.h>
109
110#endif /* __ASM_OPENRISC_PAGE_H */
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * OpenRISC Linux
4 *
5 * Linux architectural port borrowing liberally from similar works of
6 * others. All original copyrights apply as per the original source
7 * declaration.
8 *
9 * OpenRISC implementation:
10 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
11 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
12 * et al.
13 */
14
15#ifndef __ASM_OPENRISC_PAGE_H
16#define __ASM_OPENRISC_PAGE_H
17
18
19/* PAGE_SHIFT determines the page size */
20
21#define PAGE_SHIFT 13
22#ifdef __ASSEMBLY__
23#define PAGE_SIZE (1 << PAGE_SHIFT)
24#else
25#define PAGE_SIZE (1UL << PAGE_SHIFT)
26#endif
27#define PAGE_MASK (~(PAGE_SIZE-1))
28
29#define PAGE_OFFSET 0xc0000000
30#define KERNELBASE PAGE_OFFSET
31
32/* This is not necessarily the right place for this, but it's needed by
33 * drivers/of/fdt.c
34 */
35#include <asm/setup.h>
36
37#ifndef __ASSEMBLY__
38
39#define clear_page(page) memset((page), 0, PAGE_SIZE)
40#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
41
42#define clear_user_page(page, vaddr, pg) clear_page(page)
43#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
44
45/*
46 * These are used to make use of C type-checking..
47 */
48typedef struct {
49 unsigned long pte;
50} pte_t;
51typedef struct {
52 unsigned long pgd;
53} pgd_t;
54typedef struct {
55 unsigned long pgprot;
56} pgprot_t;
57typedef struct page *pgtable_t;
58
59#define pte_val(x) ((x).pte)
60#define pgd_val(x) ((x).pgd)
61#define pgprot_val(x) ((x).pgprot)
62
63#define __pte(x) ((pte_t) { (x) })
64#define __pgd(x) ((pgd_t) { (x) })
65#define __pgprot(x) ((pgprot_t) { (x) })
66
67#endif /* !__ASSEMBLY__ */
68
69
70#ifndef __ASSEMBLY__
71
72#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
73#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
74
75#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
76#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
77
78#define virt_to_page(addr) \
79 (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
80
81#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
82
83#define pfn_valid(pfn) ((pfn) < max_mapnr)
84
85#define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr)))
86
87#endif /* __ASSEMBLY__ */
88
89
90#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
91 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
92
93
94#include <asm-generic/memory_model.h>
95#include <asm-generic/getorder.h>
96
97#endif /* __ASM_OPENRISC_PAGE_H */