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1d18c47c CM |
1 | /* |
2 | * Based on arch/arm/include/asm/page.h | |
3 | * | |
4 | * Copyright (C) 1995-2003 Russell King | |
5 | * Copyright (C) 2012 ARM Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | #ifndef __ASM_PAGE_H | |
20 | #define __ASM_PAGE_H | |
21 | ||
22 | /* PAGE_SHIFT determines the page size */ | |
2ff4439b | 23 | /* CONT_SHIFT determines the number of pages which can be tracked together */ |
1d18c47c CM |
24 | #ifdef CONFIG_ARM64_64K_PAGES |
25 | #define PAGE_SHIFT 16 | |
2ff4439b | 26 | #define CONT_SHIFT 5 |
44eaacf1 SP |
27 | #elif defined(CONFIG_ARM64_16K_PAGES) |
28 | #define PAGE_SHIFT 14 | |
29 | #define CONT_SHIFT 7 | |
1d18c47c CM |
30 | #else |
31 | #define PAGE_SHIFT 12 | |
2ff4439b | 32 | #define CONT_SHIFT 4 |
1d18c47c | 33 | #endif |
2ff4439b | 34 | #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
1d18c47c CM |
35 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
36 | ||
2ff4439b JL |
37 | #define CONT_SIZE (_AC(1, UL) << (CONT_SHIFT + PAGE_SHIFT)) |
38 | #define CONT_MASK (~(CONT_SIZE-1)) | |
39 | ||
1d18c47c CM |
40 | #ifndef __ASSEMBLY__ |
41 | ||
3e275c64 | 42 | #include <linux/personality.h> /* for READ_IMPLIES_EXEC */ |
0f174025 | 43 | #include <asm/pgtable-types.h> |
1d18c47c CM |
44 | |
45 | extern void __cpu_clear_user_page(void *p, unsigned long user); | |
46 | extern void __cpu_copy_user_page(void *to, const void *from, | |
47 | unsigned long user); | |
48 | extern void copy_page(void *to, const void *from); | |
49 | extern void clear_page(void *to); | |
50 | ||
51 | #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr) | |
52 | #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) | |
53 | ||
54 | typedef struct page *pgtable_t; | |
55 | ||
56 | #ifdef CONFIG_HAVE_ARCH_PFN_VALID | |
57 | extern int pfn_valid(unsigned long); | |
58 | #endif | |
59 | ||
60 | #include <asm/memory.h> | |
61 | ||
62 | #endif /* !__ASSEMBLY__ */ | |
63 | ||
64 | #define VM_DATA_DEFAULT_FLAGS \ | |
65 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \ | |
66 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
67 | ||
68 | #include <asm-generic/getorder.h> | |
69 | ||
70 | #endif |