projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5ccc6af5 LFT |
1 | /* |
| 2 | * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch> | |
| 3 | * Copyright (C) 2004 Microtronix Datacom Ltd. | |
| 4 | * | |
| 5 | * MMU support based on asm/page.h from mips which is: | |
| 6 | * | |
| 7 | * Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle | |
| 8 | * Copyright (C) 1999, 2000 Silicon Graphics, Inc. | |
| 9 | * | |
| 10 | * This file is subject to the terms and conditions of the GNU General Public | |
| 11 | * License. See the file "COPYING" in the main directory of this archive | |
| 12 | * for more details. | |
| 13 | */ | |
| 14 | ||
| 15 | #ifndef _ASM_NIOS2_PAGE_H | |
| 16 | #define _ASM_NIOS2_PAGE_H | |
| 17 | ||
| 18 | #include <linux/pfn.h> | |
| 19 | #include <linux/const.h> | |
| 20 | ||
| 21 | /* | |
| 22 | * PAGE_SHIFT determines the page size | |
| 23 | */ | |
| 24 | #define PAGE_SHIFT 12 | |
| 25 | #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) | |
| 26 | #define PAGE_MASK (~(PAGE_SIZE - 1)) | |
| 27 | ||
| 28 | /* | |
| 29 | * PAGE_OFFSET -- the first address of the first page of memory. | |
| 30 | */ | |
| 31 | #define PAGE_OFFSET \ | |
| 32 | (CONFIG_NIOS2_MEM_BASE + CONFIG_NIOS2_KERNEL_REGION_BASE) | |
| 33 | ||
| 34 | #ifndef __ASSEMBLY__ | |
| 35 | ||
| 36 | /* | |
| 37 | * This gives the physical RAM offset. | |
| 38 | */ | |
| 39 | #define PHYS_OFFSET CONFIG_NIOS2_MEM_BASE | |
| 40 | ||
| 41 | /* | |
| 42 | * It's normally defined only for FLATMEM config but it's | |
| 43 | * used in our early mem init code for all memory models. | |
| 44 | * So always define it. | |
| 45 | */ | |
| 46 | #define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET) | |
| 47 | ||
| 48 | #define clear_page(page) memset((page), 0, PAGE_SIZE) | |
| 49 | #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) | |
| 50 | ||
| 51 | struct page; | |
| 52 | ||
| 53 | extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page); | |
| 54 | extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, | |
| 55 | struct page *to); | |
| 56 | ||
| 5ccc6af5 LFT |
57 | /* |
| 58 | * These are used to make use of C type-checking. | |
| 59 | */ | |
| 60 | typedef struct page *pgtable_t; | |
| 61 | typedef struct { unsigned long pte; } pte_t; | |
| 62 | typedef struct { unsigned long pgd; } pgd_t; | |
| 63 | typedef struct { unsigned long pgprot; } pgprot_t; | |
| 64 | ||
| 65 | #define pte_val(x) ((x).pte) | |
| 66 | #define pgd_val(x) ((x).pgd) | |
| 67 | #define pgprot_val(x) ((x).pgprot) | |
| 68 | ||
| 69 | #define __pte(x) ((pte_t) { (x) }) | |
| 70 | #define __pgd(x) ((pgd_t) { (x) }) | |
| 71 | #define __pgprot(x) ((pgprot_t) { (x) }) | |
| 72 | ||
| 73 | extern unsigned long memory_start; | |
| 74 | extern unsigned long memory_end; | |
| 75 | extern unsigned long memory_size; | |
| 76 | ||
| 77 | extern struct page *mem_map; | |
| 78 | ||
| 79 | #endif /* !__ASSEMBLY__ */ | |
| 80 | ||
| 81 | # define __pa(x) \ | |
| 82 | ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET) | |
| 83 | # define __va(x) \ | |
| 84 | ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) | |
| 85 | ||
| 86 | #define page_to_virt(page) \ | |
| 87 | ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) | |
| 88 | ||
| 89 | # define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
| 90 | # define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && \ | |
| 91 | (pfn) < max_mapnr) | |
| 92 | ||
| 93 | # define virt_to_page(vaddr) pfn_to_page(PFN_DOWN(virt_to_phys(vaddr))) | |
| 94 | # define virt_addr_valid(vaddr) pfn_valid(PFN_DOWN(virt_to_phys(vaddr))) | |
| 95 | ||
| 96 | # define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ | |
| 97 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
| 98 | ||
| 99 | # define UNCAC_ADDR(addr) \ | |
| 100 | ((void *)((unsigned)(addr) | CONFIG_NIOS2_IO_REGION_BASE)) | |
| 101 | # define CAC_ADDR(addr) \ | |
| 102 | ((void *)(((unsigned)(addr) & ~CONFIG_NIOS2_IO_REGION_BASE) | \ | |
| 103 | CONFIG_NIOS2_KERNEL_REGION_BASE)) | |
| 104 | ||
| 105 | #include <asm-generic/memory_model.h> | |
| 106 | ||
| 107 | #include <asm-generic/getorder.h> | |
| 108 | ||
| 109 | #endif /* _ASM_NIOS2_PAGE_H */ |