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 clear_page(page) memset((page), 0, PAGE_SIZE) 44 #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 45 46 #define clear_user_page(page, vaddr, pg) clear_page(page) 47 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 48 49 /* 50 * These are used to make use of C type-checking.. 51 */ 52 typedef struct { 53 unsigned long pte; 54 } pte_t; 55 typedef struct { 56 unsigned long pgd; 57 } pgd_t; 58 typedef struct { 59 unsigned long pgprot; 60 } pgprot_t; 61 typedef struct page *pgtable_t; 62 63 #define pte_val(x) ((x).pte) 64 #define pgd_val(x) ((x).pgd) 65 #define pgprot_val(x) ((x).pgprot) 66 67 #define __pte(x) ((pte_t) { (x) }) 68 #define __pgd(x) ((pgd_t) { (x) }) 69 #define __pgprot(x) ((pgprot_t) { (x) }) 70 71 #endif /* !__ASSEMBLY__ */ 72 73 74 #ifndef __ASSEMBLY__ 75 76 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) 77 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) 78 79 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 80 #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 81 82 #define virt_to_page(addr) \ 83 (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) 84 85 #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) 86 87 #define pfn_valid(pfn) ((pfn) < max_mapnr) 88 89 #define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr))) 90 91 #endif /* __ASSEMBLY__ */ 92 93 94 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 95 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 96 97 98 #include <asm-generic/memory_model.h> 99 #include <asm-generic/getorder.h> 100 101 #endif /* __ASM_OPENRISC_PAGE_H */ 102