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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 */ | |
23 | #ifdef CONFIG_ARM64_64K_PAGES | |
24 | #define PAGE_SHIFT 16 | |
25 | #else | |
26 | #define PAGE_SHIFT 12 | |
27 | #endif | |
28 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) | |
29 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
30 | ||
31 | /* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */ | |
32 | #define __HAVE_ARCH_GATE_AREA 1 | |
33 | ||
34 | #ifndef __ASSEMBLY__ | |
35 | ||
36 | #ifdef CONFIG_ARM64_64K_PAGES | |
37 | #include <asm/pgtable-2level-types.h> | |
38 | #else | |
39 | #include <asm/pgtable-3level-types.h> | |
40 | #endif | |
41 | ||
42 | extern void __cpu_clear_user_page(void *p, unsigned long user); | |
43 | extern void __cpu_copy_user_page(void *to, const void *from, | |
44 | unsigned long user); | |
45 | extern void copy_page(void *to, const void *from); | |
46 | extern void clear_page(void *to); | |
47 | ||
48 | #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr) | |
49 | #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) | |
50 | ||
51 | typedef struct page *pgtable_t; | |
52 | ||
53 | #ifdef CONFIG_HAVE_ARCH_PFN_VALID | |
54 | extern int pfn_valid(unsigned long); | |
55 | #endif | |
56 | ||
57 | #include <asm/memory.h> | |
58 | ||
59 | #endif /* !__ASSEMBLY__ */ | |
60 | ||
61 | #define VM_DATA_DEFAULT_FLAGS \ | |
62 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \ | |
63 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
64 | ||
65 | #include <asm-generic/getorder.h> | |
66 | ||
67 | #endif |