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
75static inline unsigned long virt_to_pfn(const void *kaddr)
76{
77	return __pa(kaddr) >> PAGE_SHIFT;
78}
79
80static inline void * pfn_to_virt(unsigned long pfn)
81{
82	return (void *)((unsigned long)__va(pfn) << PAGE_SHIFT);
83}
84
85#define virt_to_page(addr) \
86	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
 
 
87
88#define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
89
 
 
90#define virt_addr_valid(kaddr)	(pfn_valid(virt_to_pfn(kaddr)))
91
92#endif /* __ASSEMBLY__ */
 
 
 
 
 
93
94#include <asm-generic/memory_model.h>
95#include <asm-generic/getorder.h>
96
97#endif /* __ASM_OPENRISC_PAGE_H */

 
  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 clear_page(page)	memset((page), 0, PAGE_SIZE)
 44#define copy_page(to, from)	memcpy((to), (from), PAGE_SIZE)
 45
 46#define clear_user_page(page, vaddr, pg)        clear_page(page)
 47#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
 48
 49/*
 50 * These are used to make use of C type-checking..
 51 */
 52typedef struct {
 53	unsigned long pte;
 54} pte_t;
 55typedef struct {
 56	unsigned long pgd;
 57} pgd_t;
 58typedef struct {
 59	unsigned long pgprot;
 60} pgprot_t;
 61typedef struct page *pgtable_t;
 62
 63#define pte_val(x)	((x).pte)
 64#define pgd_val(x)	((x).pgd)
 65#define pgprot_val(x)	((x).pgprot)
 66
 67#define __pte(x)	((pte_t) { (x) })
 68#define __pgd(x)	((pgd_t) { (x) })
 69#define __pgprot(x)	((pgprot_t) { (x) })
 70
 71#endif /* !__ASSEMBLY__ */
 72
 73
 74#ifndef __ASSEMBLY__
 75
 76#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
 77#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
 78
 79#define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
 80#define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
 
 
 
 
 
 
 
 81
 82#define virt_to_page(addr) \
 83	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
 84#define page_to_virt(page) \
 85	((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
 86
 87#define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
 88
 89#define pfn_valid(pfn)          ((pfn) < max_mapnr)
 90
 91#define virt_addr_valid(kaddr)	(pfn_valid(virt_to_pfn(kaddr)))
 92
 93#endif /* __ASSEMBLY__ */
 94
 95
 96#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
 97				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 98
 99
100#include <asm-generic/memory_model.h>
101#include <asm-generic/getorder.h>
102
103#endif /* __ASM_OPENRISC_PAGE_H */