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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _PARISC_PAGE_H |
3 | #define _PARISC_PAGE_H | |
4 | ||
1c593571 SR |
5 | #include <linux/const.h> |
6 | ||
2fd83038 | 7 | #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) |
ac7fb273 | 8 | # define PAGE_SHIFT 12 |
2fd83038 | 9 | #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB) |
ac7fb273 | 10 | # define PAGE_SHIFT 14 |
2fd83038 | 11 | #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB) |
ac7fb273 | 12 | # define PAGE_SHIFT 16 |
2fd83038 HD |
13 | #else |
14 | # error "unknown default kernel page size" | |
15 | #endif | |
1c593571 | 16 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
2fd83038 HD |
17 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
18 | ||
19 | ||
1da177e4 LT |
20 | #ifndef __ASSEMBLY__ |
21 | ||
22 | #include <asm/types.h> | |
23 | #include <asm/cache.h> | |
24 | ||
76334539 JDA |
25 | #define clear_page(page) clear_page_asm((void *)(page)) |
26 | #define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from)) | |
1da177e4 LT |
27 | |
28 | struct page; | |
29 | ||
76334539 JDA |
30 | void clear_page_asm(void *page); |
31 | void copy_page_asm(void *to, void *from); | |
f8dae006 | 32 | #define clear_user_page(vto, vaddr, page) clear_page_asm(vto) |
57737c49 HD |
33 | void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, |
34 | struct page *pg); | |
76334539 | 35 | |
1da177e4 LT |
36 | /* |
37 | * These are used to make use of C type-checking.. | |
38 | */ | |
b31059f7 HD |
39 | #define STRICT_MM_TYPECHECKS |
40 | #ifdef STRICT_MM_TYPECHECKS | |
48d27cb2 | 41 | typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ |
b31059f7 | 42 | |
1da177e4 LT |
43 | /* NOTE: even on 64 bits, these entries are __u32 because we allocate |
44 | * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ | |
45 | typedef struct { __u32 pmd; } pmd_t; | |
46 | typedef struct { __u32 pgd; } pgd_t; | |
47 | typedef struct { unsigned long pgprot; } pgprot_t; | |
48 | ||
49 | #define pte_val(x) ((x).pte) | |
1da177e4 LT |
50 | /* These do not work lvalues, so make sure we don't use them as such. */ |
51 | #define pmd_val(x) ((x).pmd + 0) | |
52 | #define pgd_val(x) ((x).pgd + 0) | |
53 | #define pgprot_val(x) ((x).pgprot) | |
54 | ||
1da177e4 LT |
55 | #define __pte(x) ((pte_t) { (x) } ) |
56 | #define __pmd(x) ((pmd_t) { (x) } ) | |
57 | #define __pgd(x) ((pgd_t) { (x) } ) | |
58 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
59 | ||
b31059f7 HD |
60 | #define __pmd_val_set(x,n) (x).pmd = (n) |
61 | #define __pgd_val_set(x,n) (x).pgd = (n) | |
62 | ||
63 | #else | |
64 | /* | |
65 | * .. while these make it easier on the compiler | |
66 | */ | |
67 | typedef unsigned long pte_t; | |
68 | typedef __u32 pmd_t; | |
69 | typedef __u32 pgd_t; | |
70 | typedef unsigned long pgprot_t; | |
71 | ||
72 | #define pte_val(x) (x) | |
73 | #define pmd_val(x) (x) | |
74 | #define pgd_val(x) (x) | |
75 | #define pgprot_val(x) (x) | |
76 | ||
77 | #define __pte(x) (x) | |
78 | #define __pmd(x) (x) | |
79 | #define __pgd(x) (x) | |
80 | #define __pgprot(x) (x) | |
81 | ||
82 | #define __pmd_val_set(x,n) (x) = (n) | |
83 | #define __pgd_val_set(x,n) (x) = (n) | |
84 | ||
85 | #endif /* STRICT_MM_TYPECHECKS */ | |
86 | ||
2f569afd | 87 | typedef struct page *pgtable_t; |
b31059f7 | 88 | |
1da177e4 LT |
89 | typedef struct __physmem_range { |
90 | unsigned long start_pfn; | |
91 | unsigned long pages; /* PAGE_SIZE pages */ | |
92 | } physmem_range_t; | |
93 | ||
94 | extern physmem_range_t pmem_ranges[]; | |
95 | extern int npmem_ranges; | |
96 | ||
97 | #endif /* !__ASSEMBLY__ */ | |
98 | ||
99 | /* WARNING: The definitions below must match exactly to sizeof(pte_t) | |
100 | * etc | |
101 | */ | |
513e7ecd | 102 | #ifdef CONFIG_64BIT |
1da177e4 LT |
103 | #define BITS_PER_PTE_ENTRY 3 |
104 | #define BITS_PER_PMD_ENTRY 2 | |
105 | #define BITS_PER_PGD_ENTRY 2 | |
106 | #else | |
48d27cb2 | 107 | #define BITS_PER_PTE_ENTRY 2 |
1da177e4 LT |
108 | #define BITS_PER_PMD_ENTRY 2 |
109 | #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY | |
110 | #endif | |
111 | #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) | |
112 | #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) | |
113 | #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) | |
114 | ||
1da177e4 LT |
115 | #define LINUX_GATEWAY_SPACE 0 |
116 | ||
117 | /* This governs the relationship between virtual and physical addresses. | |
118 | * If you alter it, make sure to take care of our various fixed mapping | |
119 | * segments in fixmap.h */ | |
f5213b2c HD |
120 | #if defined(BOOTLOADER) |
121 | #define __PAGE_OFFSET (0) /* bootloader uses physical addresses */ | |
122 | #else | |
caa451f3 KM |
123 | #ifdef CONFIG_64BIT |
124 | #define __PAGE_OFFSET (0x40000000) /* 1GB */ | |
125 | #else | |
126 | #define __PAGE_OFFSET (0x10000000) /* 256MB */ | |
127 | #endif | |
f5213b2c | 128 | #endif /* BOOTLOADER */ |
1da177e4 LT |
129 | |
130 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
131 | ||
132 | /* The size of the gateway page (we leave lots of room for expansion) */ | |
133 | #define GATEWAY_PAGE_SIZE 0x4000 | |
134 | ||
135 | /* The start of the actual kernel binary---used in vmlinux.lds.S | |
136 | * Leave some space after __PAGE_OFFSET for detecting kernel null | |
137 | * ptr derefs */ | |
138 | #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) | |
139 | ||
140 | /* These macros don't work for 64-bit C code -- don't allow in C at all */ | |
141 | #ifdef __ASSEMBLY__ | |
142 | # define PA(x) ((x)-__PAGE_OFFSET) | |
143 | # define VA(x) ((x)+__PAGE_OFFSET) | |
144 | #endif | |
145 | #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) | |
146 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
147 | ||
148 | #ifndef CONFIG_DISCONTIGMEM | |
1da177e4 LT |
149 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
150 | #endif /* CONFIG_DISCONTIGMEM */ | |
151 | ||
e8b736c8 | 152 | #ifdef CONFIG_HUGETLB_PAGE |
1f25ad26 | 153 | #define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */ |
e8b736c8 HD |
154 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) |
155 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
156 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
1f25ad26 HD |
157 | |
158 | #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) | |
159 | # define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */ | |
160 | # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M | |
161 | #elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) | |
162 | # define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */ | |
163 | # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M | |
164 | #else | |
165 | # define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */ | |
166 | # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M | |
e8b736c8 | 167 | #endif |
1f25ad26 | 168 | #endif /* CONFIG_HUGETLB_PAGE */ |
e8b736c8 | 169 | |
1da177e4 LT |
170 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
171 | ||
172 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) | |
173 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
174 | ||
175 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
176 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
177 | ||
0d833b41 | 178 | #include <asm-generic/memory_model.h> |
5b17e1cd | 179 | #include <asm-generic/getorder.h> |
4a8a0788 REB |
180 | #include <asm/pdc.h> |
181 | ||
182 | #define PAGE0 ((struct zeropage *)__PAGE_OFFSET) | |
183 | ||
184 | /* DEFINITION OF THE ZERO-PAGE (PAG0) */ | |
185 | /* based on work by Jason Eckhardt (jason@equator.com) */ | |
fd4fd5aa | 186 | |
1da177e4 | 187 | #endif /* _PARISC_PAGE_H */ |