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 unsigned long pte; 35 } pte_t; 36 typedef struct { 37 unsigned long pgd; 38 } pgd_t; 39 typedef struct { 40 unsigned long pgprot; 41 } pgprot_t; 42 43 #define pte_val(x) ((x).pte) 44 #define pgd_val(x) ((x).pgd) 45 #define pgprot_val(x) ((x).pgprot) 46 47 #define __pte(x) ((pte_t) { (x) }) 48 #define __pgd(x) ((pgd_t) { (x) }) 49 #define __pgprot(x) ((pgprot_t) { (x) }) 50 51 #define pte_pgprot(x) __pgprot(pte_val(x)) 52 53 #else /* !STRICT_MM_TYPECHECKS */ 54 55 #ifdef CONFIG_ARC_HAS_PAE40 56 typedef unsigned long long pte_t; 57 #else 58 typedef unsigned long pte_t; 59 #endif 60 typedef unsigned long pgd_t; 61 typedef unsigned long pgprot_t; 62 63 #define pte_val(x) (x) 64 #define pgd_val(x) (x) 65 #define pgprot_val(x) (x) 66 #define __pte(x) (x) 67 #define __pgd(x) (x) 68 #define __pgprot(x) (x) 69 #define pte_pgprot(x) (x) 70 71 #endif 72 73 typedef pte_t * pgtable_t; 74 75 /* 76 * Use virt_to_pfn with caution: 77 * If used in pte or paddr related macros, it could cause truncation 78 * in PAE40 builds 79 * As a rule of thumb, only use it in helpers starting with virt_ 80 * You have been warned ! 81 */ 82 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 83 84 #define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_LINK_BASE) 85 86 #ifdef CONFIG_FLATMEM 87 #define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr) 88 #endif 89 90 /* 91 * __pa, __va, virt_to_page (ALERT: deprecated, don't use them) 92 * 93 * These macros have historically been misnamed 94 * virt here means link-address/program-address as embedded in object code. 95 * And for ARC, link-addr = physical address 96 */ 97 #define __pa(vaddr) ((unsigned long)(vaddr)) 98 #define __va(paddr) ((void *)((unsigned long)(paddr))) 99 100 #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) 101 #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) 102 103 /* Default Permissions for stack/heaps pages (Non Executable) */ 104 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE) 105 106 #define WANT_PAGE_VIRTUAL 1 107 108 #include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */ 109 #include <asm-generic/getorder.h> 110 111 #endif /* !__ASSEMBLY__ */ 112 113 #endif 114