projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| bd00cd5f MR |
31 | /* |
| 32 | * The idmap and swapper page tables need some space reserved in the kernel | |
| c79b954b | 33 | * image. Both require pgd, pud (4 levels only) and pmd tables to (section) |
| 383c2799 CM |
34 | * map the kernel. With the 64K page configuration, swapper and idmap need to |
| 35 | * map to pte level. The swapper also maps the FDT (see __create_page_tables | |
| 36 | * for more information). | |
| bd00cd5f | 37 | */ |
| 383c2799 CM |
38 | #ifdef CONFIG_ARM64_64K_PAGES |
| 39 | #define SWAPPER_PGTABLE_LEVELS (CONFIG_ARM64_PGTABLE_LEVELS) | |
| c79b954b | 40 | #else |
| 383c2799 | 41 | #define SWAPPER_PGTABLE_LEVELS (CONFIG_ARM64_PGTABLE_LEVELS - 1) |
| c79b954b | 42 | #endif |
| bd00cd5f | 43 | |
| 383c2799 CM |
44 | #define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE) |
| 45 | #define IDMAP_DIR_SIZE (SWAPPER_DIR_SIZE) | |
| 46 | ||
| 1d18c47c CM |
47 | #ifndef __ASSEMBLY__ |
| 48 | ||
| 0f174025 | 49 | #include <asm/pgtable-types.h> |
| 1d18c47c CM |
50 | |
| 51 | extern void __cpu_clear_user_page(void *p, unsigned long user); | |
| 52 | extern void __cpu_copy_user_page(void *to, const void *from, | |
| 53 | unsigned long user); | |
| 54 | extern void copy_page(void *to, const void *from); | |
| 55 | extern void clear_page(void *to); | |
| 56 | ||
| 57 | #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr) | |
| 58 | #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) | |
| 59 | ||
| 60 | typedef struct page *pgtable_t; | |
| 61 | ||
| 62 | #ifdef CONFIG_HAVE_ARCH_PFN_VALID | |
| 63 | extern int pfn_valid(unsigned long); | |
| 64 | #endif | |
| 65 | ||
| 66 | #include <asm/memory.h> | |
| 67 | ||
| 68 | #endif /* !__ASSEMBLY__ */ | |
| 69 | ||
| 70 | #define VM_DATA_DEFAULT_FLAGS \ | |
| 71 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \ | |
| 72 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
| 73 | ||
| 74 | #include <asm-generic/getorder.h> | |
| 75 | ||
| 76 | #endif |