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1#ifndef __ASM_SH64_PAGE_H
2#define __ASM_SH64_PAGE_H
3
4/*
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
7 * for more details.
8 *
9 * include/asm-sh64/page.h
10 *
11 * Copyright (C) 2000, 2001 Paolo Alberelli
12 * Copyright (C) 2003, 2004 Paul Mundt
13 *
14 * benedict.gaster@superh.com 19th, 24th July 2002.
15 *
16 * Modified to take account of enabling for D-CACHE support.
17 *
18 */
19
20#include <linux/config.h>
21
22/* PAGE_SHIFT determines the page size */
23#define PAGE_SHIFT 12
24#ifdef __ASSEMBLY__
25#define PAGE_SIZE 4096
26#else
27#define PAGE_SIZE (1UL << PAGE_SHIFT)
28#endif
29#define PAGE_MASK (~(PAGE_SIZE-1))
30#define PTE_MASK PAGE_MASK
31
32#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
33#define HPAGE_SHIFT 16
34#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
35#define HPAGE_SHIFT 20
36#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB)
37#define HPAGE_SHIFT 29
38#endif
39
40#ifdef CONFIG_HUGETLB_PAGE
41#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
42#define HPAGE_MASK (~(HPAGE_SIZE-1))
43#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
44#define ARCH_HAS_SETCLEAR_HUGE_PTE
45#endif
46
47#ifdef __KERNEL__
48#ifndef __ASSEMBLY__
49
50extern struct page *mem_map;
51extern void sh64_page_clear(void *page);
52extern void sh64_page_copy(void *from, void *to);
53
54#define clear_page(page) sh64_page_clear(page)
55#define copy_page(to,from) sh64_page_copy(from, to)
56
57#if defined(CONFIG_DCACHE_DISABLED)
58
59#define clear_user_page(page, vaddr, pg) clear_page(page)
60#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
61
62#else
63
64extern void clear_user_page(void *to, unsigned long address, struct page *pg);
65extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
66
67#endif /* defined(CONFIG_DCACHE_DISABLED) */
68
69/*
70 * These are used to make use of C type-checking..
71 */
72typedef struct { unsigned long long pte; } pte_t;
73typedef struct { unsigned long pmd; } pmd_t;
74typedef struct { unsigned long pgd; } pgd_t;
75typedef struct { unsigned long pgprot; } pgprot_t;
76
77#define pte_val(x) ((x).pte)
78#define pmd_val(x) ((x).pmd)
79#define pgd_val(x) ((x).pgd)
80#define pgprot_val(x) ((x).pgprot)
81
82#define __pte(x) ((pte_t) { (x) } )
83#define __pmd(x) ((pmd_t) { (x) } )
84#define __pgd(x) ((pgd_t) { (x) } )
85#define __pgprot(x) ((pgprot_t) { (x) } )
86
87#endif /* !__ASSEMBLY__ */
88
89/* to align the pointer to the (next) page boundary */
90#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
91
92/*
93 * Kconfig defined.
94 */
95#define __MEMORY_START (CONFIG_MEMORY_START)
96#define PAGE_OFFSET (CONFIG_CACHED_MEMORY_OFFSET)
97
98#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
99#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
100#define MAP_NR(addr) ((__pa(addr)-__MEMORY_START) >> PAGE_SHIFT)
101#define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
102
103#define phys_to_page(phys) (mem_map + (((phys) - __MEMORY_START) >> PAGE_SHIFT))
104#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
105
106/* PFN start number, because of __MEMORY_START */
107#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
108
109#define pfn_to_page(pfn) (mem_map + (pfn) - PFN_START)
110#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PFN_START)
111#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
112#define pfn_valid(pfn) (((pfn) - PFN_START) < max_mapnr)
113#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
114
115#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
116 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
117
118#endif /* __KERNEL__ */
119
120#include <asm-generic/page.h>
121
122#endif /* __ASM_SH64_PAGE_H */