1 /* 2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 #ifndef __ASM_ARC_PAGE_H 9 #define __ASM_ARC_PAGE_H 10 11 #include <uapi/asm/page.h> 12 13 #ifndef __ASSEMBLY__ 14 15 #define clear_page(paddr) memset((paddr), 0, PAGE_SIZE) 16 #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 17 18 struct vm_area_struct; 19 struct page; 20 21 #define __HAVE_ARCH_COPY_USER_HIGHPAGE 22 23 void copy_user_highpage(struct page *to, struct page *from, 24 unsigned long u_vaddr, struct vm_area_struct *vma); 25 void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); 26 27 #undef STRICT_MM_TYPECHECKS 28 29 #ifdef STRICT_MM_TYPECHECKS 30 /* 31 * These are used to make use of C type-checking.. 32 */ 33 typedef struct { 34 #ifdef CONFIG_ARC_HAS_PAE40 35 unsigned long long pte; 36 #else 37 unsigned long pte; 38 #endif 39 } pte_t; 40 typedef struct { 41 unsigned long pgd; 42 } pgd_t; 43 typedef struct { 44 unsigned long pgprot; 45 } pgprot_t; 46 47 #define pte_val(x) ((x).pte) 48 #define pgd_val(x) ((x).pgd) 49 #define pgprot_val(x) ((x).pgprot) 50 51 #define __pte(x) ((pte_t) { (x) }) 52 #define __pgd(x) ((pgd_t) { (x) }) 53 #define __pgprot(x) ((pgprot_t) { (x) }) 54 55 #define pte_pgprot(x) __pgprot(pte_val(x)) 56 57 #else /* !STRICT_MM_TYPECHECKS */ 58 59 #ifdef CONFIG_ARC_HAS_PAE40 60 typedef unsigned long long pte_t; 61 #else 62 typedef unsigned long pte_t; 63 #endif 64 typedef unsigned long pgd_t; 65 typedef unsigned long pgprot_t; 66 67 #define pte_val(x) (x) 68 #define pgd_val(x) (x) 69 #define pgprot_val(x) (x) 70 #define __pte(x) (x) 71 #define __pgd(x) (x) 72 #define __pgprot(x) (x) 73 #define pte_pgprot(x) (x) 74 75 #endif 76 77 typedef pte_t * pgtable_t; 78 79 /* 80 * Use virt_to_pfn with caution: 81 * If used in pte or paddr related macros, it could cause truncation 82 * in PAE40 builds 83 * As a rule of thumb, only use it in helpers starting with virt_ 84 * You have been warned ! 85 */ 86 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 87 88 #define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_LINK_BASE) 89 90 #ifdef CONFIG_FLATMEM 91 #define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr) 92 #endif 93 94 /* 95 * __pa, __va, virt_to_page (ALERT: deprecated, don't use them) 96 * 97 * These macros have historically been misnamed 98 * virt here means link-address/program-address as embedded in object code. 99 * And for ARC, link-addr = physical address 100 */ 101 #define __pa(vaddr) ((unsigned long)(vaddr)) 102 #define __va(paddr) ((void *)((unsigned long)(paddr))) 103 104 #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) 105 #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) 106 107 /* Default Permissions for stack/heaps pages (Non Executable) */ 108 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE) 109 110 #define WANT_PAGE_VIRTUAL 1 111 112 #include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */ 113 #include <asm-generic/getorder.h> 114 115 #endif /* !__ASSEMBLY__ */ 116 117 #endif 118