1 /* 2 * OpenRISC Linux 3 * 4 * Linux architectural port borrowing liberally from similar works of 5 * others. All original copyrights apply as per the original source 6 * declaration. 7 * 8 * OpenRISC implementation: 9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> 10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> 11 * et al. 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 */ 18 19 #ifndef __ASM_OPENRISC_PAGE_H 20 #define __ASM_OPENRISC_PAGE_H 21 22 23 /* PAGE_SHIFT determines the page size */ 24 25 #define PAGE_SHIFT 13 26 #ifdef __ASSEMBLY__ 27 #define PAGE_SIZE (1 << PAGE_SHIFT) 28 #else 29 #define PAGE_SIZE (1UL << PAGE_SHIFT) 30 #endif 31 #define PAGE_MASK (~(PAGE_SIZE-1)) 32 33 #define PAGE_OFFSET 0xc0000000 34 #define KERNELBASE PAGE_OFFSET 35 36 /* This is not necessarily the right place for this, but it's needed by 37 * drivers/of/fdt.c 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 /* 53 * These are used to make use of C type-checking.. 54 */ 55 typedef struct { 56 unsigned long pte; 57 } pte_t; 58 typedef struct { 59 unsigned long pgd; 60 } pgd_t; 61 typedef struct { 62 unsigned long pgprot; 63 } pgprot_t; 64 typedef struct page *pgtable_t; 65 66 #define pte_val(x) ((x).pte) 67 #define pgd_val(x) ((x).pgd) 68 #define pgprot_val(x) ((x).pgprot) 69 70 #define __pte(x) ((pte_t) { (x) }) 71 #define __pgd(x) ((pgd_t) { (x) }) 72 #define __pgprot(x) ((pgprot_t) { (x) }) 73 74 #endif /* !__ASSEMBLY__ */ 75 76 77 #ifndef __ASSEMBLY__ 78 79 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) 80 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) 81 82 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 83 #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 84 85 #define virt_to_page(addr) \ 86 (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) 87 #define page_to_virt(page) \ 88 ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) 89 90 #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) 91 92 #define pfn_valid(pfn) ((pfn) < max_mapnr) 93 94 #define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr))) 95 96 #endif /* __ASSEMBLY__ */ 97 98 99 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 100 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 101 102 103 #include <asm-generic/memory_model.h> 104 #include <asm-generic/getorder.h> 105 106 #endif /* __ASM_OPENRISC_PAGE_H */ 107