1#ifndef __ASM_SH_PAGE_H
2#define __ASM_SH_PAGE_H
3
4
5
6
7
8#include <linux/const.h>
9
10
11#if defined(CONFIG_PAGE_SIZE_4KB)
12# define PAGE_SHIFT 12
13#elif defined(CONFIG_PAGE_SIZE_8KB)
14# define PAGE_SHIFT 13
15#elif defined(CONFIG_PAGE_SIZE_16KB)
16# define PAGE_SHIFT 14
17#elif defined(CONFIG_PAGE_SIZE_64KB)
18# define PAGE_SHIFT 16
19#else
20# error "Bogus kernel page size?"
21#endif
22
23#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
24#define PAGE_MASK (~(PAGE_SIZE-1))
25#define PTE_MASK PAGE_MASK
26
27#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
28#define HPAGE_SHIFT 16
29#elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
30#define HPAGE_SHIFT 18
31#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
32#define HPAGE_SHIFT 20
33#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
34#define HPAGE_SHIFT 22
35#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB)
36#define HPAGE_SHIFT 26
37#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB)
38#define HPAGE_SHIFT 29
39#endif
40
41#ifdef CONFIG_HUGETLB_PAGE
42#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
43#define HPAGE_MASK (~(HPAGE_SIZE-1))
44#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
45#endif
46
47#ifndef __ASSEMBLY__
48#include <asm/uncached.h>
49
50extern unsigned long shm_align_mask;
51extern unsigned long max_low_pfn, min_low_pfn;
52extern unsigned long memory_start, memory_end, memory_limit;
53
54static inline unsigned long
55pages_do_alias(unsigned long addr1, unsigned long addr2)
56{
57 return (addr1 ^ addr2) & shm_align_mask;
58}
59
60#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
61extern void copy_page(void *to, void *from);
62
63struct page;
64struct vm_area_struct;
65
66extern void copy_user_highpage(struct page *to, struct page *from,
67 unsigned long vaddr, struct vm_area_struct *vma);
68#define __HAVE_ARCH_COPY_USER_HIGHPAGE
69extern void clear_user_highpage(struct page *page, unsigned long vaddr);
70#define clear_user_highpage clear_user_highpage
71
72
73
74
75#ifdef CONFIG_X2TLB
76typedef struct { unsigned long pte_low, pte_high; } pte_t;
77typedef struct { unsigned long long pgprot; } pgprot_t;
78typedef struct { unsigned long long pgd; } pgd_t;
79#define pte_val(x) \
80 ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
81#define __pte(x) \
82 ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
83#elif defined(CONFIG_SUPERH32)
84typedef struct { unsigned long pte_low; } pte_t;
85typedef struct { unsigned long pgprot; } pgprot_t;
86typedef struct { unsigned long pgd; } pgd_t;
87#define pte_val(x) ((x).pte_low)
88#define __pte(x) ((pte_t) { (x) } )
89#else
90typedef struct { unsigned long long pte_low; } pte_t;
91typedef struct { unsigned long long pgprot; } pgprot_t;
92typedef struct { unsigned long pgd; } pgd_t;
93#define pte_val(x) ((x).pte_low)
94#define __pte(x) ((pte_t) { (x) } )
95#endif
96
97#define pgd_val(x) ((x).pgd)
98#define pgprot_val(x) ((x).pgprot)
99
100#define __pgd(x) ((pgd_t) { (x) } )
101#define __pgprot(x) ((pgprot_t) { (x) } )
102
103typedef struct page *pgtable_t;
104
105#define pte_pgprot(x) __pgprot(pte_val(x) & PTE_FLAGS_MASK)
106
107#endif
108
109
110
111
112#define __MEMORY_START CONFIG_MEMORY_START
113#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
114
115
116
117
118
119#define PAGE_OFFSET CONFIG_PAGE_OFFSET
120
121
122
123
124
125
126
127
128
129
130#ifdef CONFIG_PMB
131#define ___pa(x) ((x)-PAGE_OFFSET+__MEMORY_START)
132#define ___va(x) ((x)+PAGE_OFFSET-__MEMORY_START)
133#else
134#define ___pa(x) ((x)-PAGE_OFFSET)
135#define ___va(x) ((x)+PAGE_OFFSET)
136#endif
137
138#ifndef __ASSEMBLY__
139#define __pa(x) ___pa((unsigned long)x)
140#define __va(x) (void *)___va((unsigned long)x)
141#endif
142
143#ifdef CONFIG_UNCACHED_MAPPING
144#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + uncached_start)
145#define CAC_ADDR(addr) ((addr) - uncached_start + PAGE_OFFSET)
146#else
147#define UNCAC_ADDR(addr) ((addr))
148#define CAC_ADDR(addr) ((addr))
149#endif
150
151#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
152#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
153
154
155
156
157
158
159
160#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
161#define ARCH_PFN_OFFSET (PFN_START)
162#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
163#ifdef CONFIG_FLATMEM
164#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
165#endif
166#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
167
168#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
169 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
170
171#include <asm-generic/memory_model.h>
172#include <asm-generic/getorder.h>
173
174
175#ifdef CONFIG_VSYSCALL
176#define __HAVE_ARCH_GATE_AREA
177#endif
178
179
180
181
182
183#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
184
185#ifdef CONFIG_SUPERH64
186
187
188
189
190
191
192
193#define ARCH_SLAB_MINALIGN 8
194#endif
195
196#endif
197