1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) 4 */ 5 #ifndef __ASM_ARC_PAGE_H 6 #define __ASM_ARC_PAGE_H 7 8 #include <uapi/asm/page.h> 9 10 #ifdef CONFIG_ARC_HAS_PAE40 11 12 #define MAX_POSSIBLE_PHYSMEM_BITS 40 13 #define PAGE_MASK_PHYS (0xff00000000ull | PAGE_MASK) 14 15 #else /* CONFIG_ARC_HAS_PAE40 */ 16 17 #define MAX_POSSIBLE_PHYSMEM_BITS 32 18 #define PAGE_MASK_PHYS PAGE_MASK 19 20 #endif /* CONFIG_ARC_HAS_PAE40 */ 21 22 #ifndef __ASSEMBLY__ 23 24 #define clear_page(paddr) memset((paddr), 0, PAGE_SIZE) 25 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 26 #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 27 28 struct vm_area_struct; 29 struct page; 30 31 #define __HAVE_ARCH_COPY_USER_HIGHPAGE 32 33 void copy_user_highpage(struct page *to, struct page *from, 34 unsigned long u_vaddr, struct vm_area_struct *vma); 35 void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); 36 37 #undef STRICT_MM_TYPECHECKS 38 39 #ifdef STRICT_MM_TYPECHECKS 40 /* 41 * These are used to make use of C type-checking.. 42 */ 43 typedef struct { 44 #ifdef CONFIG_ARC_HAS_PAE40 45 unsigned long long pte; 46 #else 47 unsigned long pte; 48 #endif 49 } pte_t; 50 typedef struct { 51 unsigned long pgd; 52 } pgd_t; 53 typedef struct { 54 unsigned long pgprot; 55 } pgprot_t; 56 57 #define pte_val(x) ((x).pte) 58 #define pgd_val(x) ((x).pgd) 59 #define pgprot_val(x) ((x).pgprot) 60 61 #define __pte(x) ((pte_t) { (x) }) 62 #define __pgd(x) ((pgd_t) { (x) }) 63 #define __pgprot(x) ((pgprot_t) { (x) }) 64 65 #define pte_pgprot(x) __pgprot(pte_val(x)) 66 67 #else /* !STRICT_MM_TYPECHECKS */ 68 69 #ifdef CONFIG_ARC_HAS_PAE40 70 typedef unsigned long long pte_t; 71 #else 72 typedef unsigned long pte_t; 73 #endif 74 typedef unsigned long pgd_t; 75 typedef unsigned long pgprot_t; 76 77 #define pte_val(x) (x) 78 #define pgd_val(x) (x) 79 #define pgprot_val(x) (x) 80 #define __pte(x) (x) 81 #define __pgd(x) (x) 82 #define __pgprot(x) (x) 83 #define pte_pgprot(x) (x) 84 85 #endif 86 87 typedef pte_t * pgtable_t; 88 89 /* 90 * Use virt_to_pfn with caution: 91 * If used in pte or paddr related macros, it could cause truncation 92 * in PAE40 builds 93 * As a rule of thumb, only use it in helpers starting with virt_ 94 * You have been warned ! 95 */ 96 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 97 98 /* 99 * When HIGHMEM is enabled we have holes in the memory map so we need 100 * pfn_valid() that takes into account the actual extents of the physical 101 * memory 102 */ 103 #ifdef CONFIG_HIGHMEM 104 105 extern unsigned long arch_pfn_offset; 106 #define ARCH_PFN_OFFSET arch_pfn_offset 107 108 extern int pfn_valid(unsigned long pfn); 109 #define pfn_valid pfn_valid 110 111 #else /* CONFIG_HIGHMEM */ 112 113 #define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_RAM_BASE) 114 #define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr) 115 116 #endif /* CONFIG_HIGHMEM */ 117 118 /* 119 * __pa, __va, virt_to_page (ALERT: deprecated, don't use them) 120 * 121 * These macros have historically been misnamed 122 * virt here means link-address/program-address as embedded in object code. 123 * And for ARC, link-addr = physical address 124 */ 125 #define __pa(vaddr) ((unsigned long)(vaddr)) 126 #define __va(paddr) ((void *)((unsigned long)(paddr))) 127 128 #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) 129 #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) 130 131 /* Default Permissions for stack/heaps pages (Non Executable) */ 132 #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC 133 134 #define WANT_PAGE_VIRTUAL 1 135 136 #include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */ 137 #include <asm-generic/getorder.h> 138 139 #endif /* !__ASSEMBLY__ */ 140 141 #endif 142