diff options
Diffstat (limited to 'include/asm-mn10300/page.h')
-rw-r--r-- | include/asm-mn10300/page.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/include/asm-mn10300/page.h b/include/asm-mn10300/page.h new file mode 100644 index 000000000000..124971b9fb9b --- /dev/null +++ b/include/asm-mn10300/page.h | |||
@@ -0,0 +1,131 @@ | |||
1 | /* MN10300 Page table definitions | ||
2 | * | ||
3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | ||
4 | * Written by David Howells (dhowells@redhat.com) | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU General Public Licence | ||
8 | * as published by the Free Software Foundation; either version | ||
9 | * 2 of the Licence, or (at your option) any later version. | ||
10 | */ | ||
11 | #ifndef _ASM_PAGE_H | ||
12 | #define _ASM_PAGE_H | ||
13 | |||
14 | /* PAGE_SHIFT determines the page size */ | ||
15 | #define PAGE_SHIFT 12 | ||
16 | |||
17 | #ifndef __ASSEMBLY__ | ||
18 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | ||
19 | #define PAGE_MASK (~(PAGE_SIZE - 1)) | ||
20 | #else | ||
21 | #define PAGE_SIZE +(1 << PAGE_SHIFT) /* unary plus marks an | ||
22 | * immediate val not an addr */ | ||
23 | #define PAGE_MASK +(~(PAGE_SIZE - 1)) | ||
24 | #endif | ||
25 | |||
26 | #ifdef __KERNEL__ | ||
27 | #ifndef __ASSEMBLY__ | ||
28 | |||
29 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | ||
30 | #define copy_page(to, from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) | ||
31 | |||
32 | #define clear_user_page(addr, vaddr, page) clear_page(addr) | ||
33 | #define copy_user_page(vto, vfrom, vaddr, to) copy_page(vto, vfrom) | ||
34 | |||
35 | /* | ||
36 | * These are used to make use of C type-checking.. | ||
37 | */ | ||
38 | typedef struct { unsigned long pte; } pte_t; | ||
39 | typedef struct { unsigned long pgd; } pgd_t; | ||
40 | typedef struct { unsigned long pgprot; } pgprot_t; | ||
41 | typedef struct page *pgtable_t; | ||
42 | |||
43 | #define PTE_MASK PAGE_MASK | ||
44 | #define HPAGE_SHIFT 22 | ||
45 | |||
46 | #ifdef CONFIG_HUGETLB_PAGE | ||
47 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) | ||
48 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | ||
49 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | ||
50 | #endif | ||
51 | |||
52 | #define pte_val(x) ((x).pte) | ||
53 | #define pgd_val(x) ((x).pgd) | ||
54 | #define pgprot_val(x) ((x).pgprot) | ||
55 | |||
56 | #define __pte(x) ((pte_t) { (x) }) | ||
57 | #define __pgd(x) ((pgd_t) { (x) }) | ||
58 | #define __pgprot(x) ((pgprot_t) { (x) }) | ||
59 | |||
60 | #include <asm-generic/pgtable-nopmd.h> | ||
61 | |||
62 | #endif /* !__ASSEMBLY__ */ | ||
63 | |||
64 | /* to align the pointer to the (next) page boundary */ | ||
65 | #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) | ||
66 | |||
67 | /* | ||
68 | * This handles the memory map.. We could make this a config | ||
69 | * option, but too many people screw it up, and too few need | ||
70 | * it. | ||
71 | * | ||
72 | * A __PAGE_OFFSET of 0xC0000000 means that the kernel has | ||
73 | * a virtual address space of one gigabyte, which limits the | ||
74 | * amount of physical memory you can use to about 950MB. | ||
75 | */ | ||
76 | |||
77 | #ifndef __ASSEMBLY__ | ||
78 | |||
79 | /* Pure 2^n version of get_order */ | ||
80 | static inline int get_order(unsigned long size) __attribute__((const)); | ||
81 | static inline int get_order(unsigned long size) | ||
82 | { | ||
83 | int order; | ||
84 | |||
85 | size = (size - 1) >> (PAGE_SHIFT - 1); | ||
86 | order = -1; | ||
87 | do { | ||
88 | size >>= 1; | ||
89 | order++; | ||
90 | } while (size); | ||
91 | return order; | ||
92 | } | ||
93 | |||
94 | #endif /* __ASSEMBLY__ */ | ||
95 | |||
96 | #include <asm/page_offset.h> | ||
97 | |||
98 | #define __PAGE_OFFSET (PAGE_OFFSET_RAW) | ||
99 | #define PAGE_OFFSET ((unsigned long) __PAGE_OFFSET) | ||
100 | |||
101 | /* | ||
102 | * main RAM and kernel working space are coincident at 0x90000000, but to make | ||
103 | * life more interesting, there's also an uncached virtual shadow at 0xb0000000 | ||
104 | * - these mappings are fixed in the MMU | ||
105 | */ | ||
106 | #define __pfn_disp (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT) | ||
107 | |||
108 | #define __pa(x) ((unsigned long)(x)) | ||
109 | #define __va(x) ((void *)(unsigned long)(x)) | ||
110 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | ||
111 | #define pfn_to_page(pfn) (mem_map + ((pfn) - __pfn_disp)) | ||
112 | #define page_to_pfn(page) ((unsigned long)((page) - mem_map) + __pfn_disp) | ||
113 | |||
114 | #define pfn_valid(pfn) \ | ||
115 | ({ \ | ||
116 | unsigned long __pfn = (pfn) - __pfn_disp; \ | ||
117 | __pfn < max_mapnr; \ | ||
118 | }) | ||
119 | |||
120 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | ||
121 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | ||
122 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) | ||
123 | |||
124 | #define VM_DATA_DEFAULT_FLAGS \ | ||
125 | (VM_READ | VM_WRITE | \ | ||
126 | ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \ | ||
127 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | ||
128 | |||
129 | #endif /* __KERNEL__ */ | ||
130 | |||
131 | #endif /* _ASM_PAGE_H */ | ||