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 typedef struct { 38 unsigned long pgd; 39 } pgd_t; 40 41 #define pgd_val(x) ((x).pgd) 42 #define __pgd(x) ((pgd_t) { (x) }) 43 44 #if CONFIG_PGTABLE_LEVELS > 3 45 46 typedef struct { 47 unsigned long pud; 48 } pud_t; 49 50 #define pud_val(x) ((x).pud) 51 #define __pud(x) ((pud_t) { (x) }) 52 53 #endif 54 55 #if CONFIG_PGTABLE_LEVELS > 2 56 57 typedef struct { 58 unsigned long pmd; 59 } pmd_t; 60 61 #define pmd_val(x) ((x).pmd) 62 #define __pmd(x) ((pmd_t) { (x) }) 63 64 #endif 65 66 typedef struct { 67 #ifdef CONFIG_ARC_HAS_PAE40 68 unsigned long long pte; 69 #else 70 unsigned long pte; 71 #endif 72 } pte_t; 73 74 #define pte_val(x) ((x).pte) 75 #define __pte(x) ((pte_t) { (x) }) 76 77 typedef struct { 78 unsigned long pgprot; 79 } pgprot_t; 80 81 #define pgprot_val(x) ((x).pgprot) 82 #define __pgprot(x) ((pgprot_t) { (x) }) 83 #define pte_pgprot(x) __pgprot(pte_val(x)) 84 85 typedef struct page *pgtable_t; 86 87 /* 88 * When HIGHMEM is enabled we have holes in the memory map so we need 89 * pfn_valid() that takes into account the actual extents of the physical 90 * memory 91 */ 92 #ifdef CONFIG_HIGHMEM 93 94 extern unsigned long arch_pfn_offset; 95 #define ARCH_PFN_OFFSET arch_pfn_offset 96 97 extern int pfn_valid(unsigned long pfn); 98 #define pfn_valid pfn_valid 99 100 #else /* CONFIG_HIGHMEM */ 101 102 #define ARCH_PFN_OFFSET virt_to_pfn((void *)CONFIG_LINUX_RAM_BASE) 103 104 #endif /* CONFIG_HIGHMEM */ 105 106 /* 107 * __pa, __va, virt_to_page (ALERT: deprecated, don't use them) 108 * 109 * These macros have historically been misnamed 110 * virt here means link-address/program-address as embedded in object code. 111 * And for ARC, link-addr = physical address 112 */ 113 #define __pa(vaddr) ((unsigned long)(vaddr)) 114 #define __va(paddr) ((void *)((unsigned long)(paddr))) 115 116 /* 117 * Use virt_to_pfn with caution: 118 * If used in pte or paddr related macros, it could cause truncation 119 * in PAE40 builds 120 * As a rule of thumb, only use it in helpers starting with virt_ 121 * You have been warned ! 122 */ 123 static inline unsigned long virt_to_pfn(const void *kaddr) 124 { 125 return __pa(kaddr) >> PAGE_SHIFT; 126 } 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