| 1 | /* |
| 2 | * arch/ubicom32/include/asm/page.h |
| 3 | * Memory page related operations and definitions. |
| 4 | * |
| 5 | * (C) Copyright 2009, Ubicom, Inc. |
| 6 | * |
| 7 | * This file is part of the Ubicom32 Linux Kernel Port. |
| 8 | * |
| 9 | * The Ubicom32 Linux Kernel Port is free software: you can redistribute |
| 10 | * it and/or modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation, either version 2 of the |
| 12 | * License, or (at your option) any later version. |
| 13 | * |
| 14 | * The Ubicom32 Linux Kernel Port is distributed in the hope that it |
| 15 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 16 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with the Ubicom32 Linux Kernel Port. If not, |
| 21 | * see <http://www.gnu.org/licenses/>. |
| 22 | * |
| 23 | * Ubicom32 implementation derived from (with many thanks): |
| 24 | * arch/m68knommu |
| 25 | * arch/blackfin |
| 26 | * arch/parisc |
| 27 | */ |
| 28 | #ifndef _ASM_UBICOM32_PAGE_H |
| 29 | #define _ASM_UBICOM32_PAGE_H |
| 30 | |
| 31 | #include <linux/const.h> |
| 32 | |
| 33 | /* PAGE_SHIFT determines the page size */ |
| 34 | |
| 35 | #define PAGE_SHIFT (12) |
| 36 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
| 37 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
| 38 | |
| 39 | #include <asm/setup.h> |
| 40 | |
| 41 | #ifndef __ASSEMBLY__ |
| 42 | |
| 43 | #define get_user_page(vaddr) __get_free_page(GFP_KERNEL) |
| 44 | #define free_user_page(page, addr) free_page(addr) |
| 45 | |
| 46 | #define clear_page(page) memset((page), 0, PAGE_SIZE) |
| 47 | #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) |
| 48 | |
| 49 | #define clear_user_page(page, vaddr, pg) clear_page(page) |
| 50 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) |
| 51 | |
| 52 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ |
| 53 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) |
| 54 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE |
| 55 | |
| 56 | /* |
| 57 | * These are used to make use of C type-checking.. |
| 58 | */ |
| 59 | typedef struct { unsigned long pte; } pte_t; |
| 60 | typedef struct { unsigned long pmd[16]; } pmd_t; |
| 61 | typedef struct { unsigned long pgd; } pgd_t; |
| 62 | typedef struct { unsigned long pgprot; } pgprot_t; |
| 63 | typedef struct page *pgtable_t; |
| 64 | |
| 65 | #define pte_val(x) ((x).pte) |
| 66 | #define pmd_val(x) ((&x)->pmd[0]) |
| 67 | #define pgd_val(x) ((x).pgd) |
| 68 | #define pgprot_val(x) ((x).pgprot) |
| 69 | |
| 70 | #define __pte(x) ((pte_t) { (x) } ) |
| 71 | #define __pmd(x) ((pmd_t) { (x) } ) |
| 72 | #define __pgd(x) ((pgd_t) { (x) } ) |
| 73 | #define __pgprot(x) ((pgprot_t) { (x) } ) |
| 74 | |
| 75 | extern unsigned long memory_start; |
| 76 | extern unsigned long memory_end; |
| 77 | |
| 78 | #endif /* !__ASSEMBLY__ */ |
| 79 | |
| 80 | #include <asm/page_offset.h> |
| 81 | |
| 82 | #define PAGE_OFFSET (PAGE_OFFSET_RAW) |
| 83 | |
| 84 | #ifndef __ASSEMBLY__ |
| 85 | |
| 86 | #define __pa(vaddr) virt_to_phys((void *)(vaddr)) |
| 87 | #define __va(paddr) phys_to_virt((unsigned long)(paddr)) |
| 88 | |
| 89 | #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) |
| 90 | #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) |
| 91 | |
| 92 | #define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) |
| 93 | #define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) |
| 94 | |
| 95 | #define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn)) |
| 96 | #define page_to_pfn(page) virt_to_pfn(page_to_virt(page)) |
| 97 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
| 98 | |
| 99 | #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ |
| 100 | ((void *)(kaddr) < (void *)memory_end)) |
| 101 | |
| 102 | #endif /* __ASSEMBLY__ */ |
| 103 | |
| 104 | #define VM_DATA_DEFAULT_FLAGS \ |
| 105 | (VM_READ | VM_WRITE | \ |
| 106 | ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ |
| 107 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| 108 | |
| 109 | #include <linux/version.h> |
| 110 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32) |
| 111 | #include <asm-generic/getorder.h> |
| 112 | #else |
| 113 | #include <asm-generic/page.h> |
| 114 | #endif |
| 115 | |
| 116 | #endif /* _ASM_UBICOM32_PAGE_H */ |
| 117 | |
