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
21/* PAGE_SHIFT determines the page size */
22#define PAGE_SHIFT	12
23#ifdef __ASSEMBLY__
24#define PAGE_SIZE	4096
25#else
26#define PAGE_SIZE	(1UL << PAGE_SHIFT)
27#endif
28#define PAGE_MASK	(~(PAGE_SIZE-1))
29#define PTE_MASK	PAGE_MASK
30
31#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
32#define HPAGE_SHIFT	16
33#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
34#define HPAGE_SHIFT	20
35#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB)
36#define HPAGE_SHIFT	29
37#endif
38
39#ifdef CONFIG_HUGETLB_PAGE
40#define HPAGE_SIZE		(1UL << HPAGE_SHIFT)
41#define HPAGE_MASK		(~(HPAGE_SIZE-1))
42#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT-PAGE_SHIFT)
43#define ARCH_HAS_SETCLEAR_HUGE_PTE
44#endif
45
46#ifdef __KERNEL__
47#ifndef __ASSEMBLY__
48
49extern struct page *mem_map;
50extern void sh64_page_clear(void *page);
51extern void sh64_page_copy(void *from, void *to);
52
53#define clear_page(page)               sh64_page_clear(page)
54#define copy_page(to,from)             sh64_page_copy(from, to)
55
56#if defined(CONFIG_DCACHE_DISABLED)
57
58#define clear_user_page(page, vaddr, pg)	clear_page(page)
59#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
60
61#else
62
63extern void clear_user_page(void *to, unsigned long address, struct page *pg);
64extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
65
66#endif /* defined(CONFIG_DCACHE_DISABLED) */
67
68/*
69 * These are used to make use of C type-checking..
70 */
71typedef struct { unsigned long long pte; } pte_t;
72typedef struct { unsigned long pmd; } pmd_t;
73typedef struct { unsigned long pgd; } pgd_t;
74typedef struct { unsigned long pgprot; } pgprot_t;
75
76#define pte_val(x)	((x).pte)
77#define pmd_val(x)	((x).pmd)
78#define pgd_val(x)	((x).pgd)
79#define pgprot_val(x)	((x).pgprot)
80
81#define __pte(x) ((pte_t) { (x) } )
82#define __pmd(x) ((pmd_t) { (x) } )
83#define __pgd(x) ((pgd_t) { (x) } )
84#define __pgprot(x)	((pgprot_t) { (x) } )
85
86#endif /* !__ASSEMBLY__ */
87
88/* to align the pointer to the (next) page boundary */
89#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
90
91/*
92 * Kconfig defined.
93 */
94#define __MEMORY_START		(CONFIG_MEMORY_START)
95#define PAGE_OFFSET		(CONFIG_CACHED_MEMORY_OFFSET)
96
97#define __pa(x)			((unsigned long)(x)-PAGE_OFFSET)
98#define __va(x)			((void *)((unsigned long)(x)+PAGE_OFFSET))
99#define MAP_NR(addr)		((__pa(addr)-__MEMORY_START) >> PAGE_SHIFT)
100#define VALID_PAGE(page)	((page - mem_map) < max_mapnr)
101
102#define phys_to_page(phys)	(mem_map + (((phys) - __MEMORY_START) >> PAGE_SHIFT))
103#define page_to_phys(page)	(((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
104
105/* PFN start number, because of __MEMORY_START */
106#define PFN_START		(__MEMORY_START >> PAGE_SHIFT)
107#define ARCH_PFN_OFFSET		(PFN_START)
108#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
109#define pfn_valid(pfn)		(((pfn) - PFN_START) < max_mapnr)
110#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
111
112#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
113				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
114
115#include <asm-generic/memory_model.h>
116#include <asm-generic/page.h>
117
118#endif /* __KERNEL__ */
119#endif /* __ASM_SH64_PAGE_H */
120