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 __ASSEMBLER__ 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 36 #define clear_user_page clear_user_page 37 void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); 38 39 typedef struct { 40 unsigned long pgd; 41 } pgd_t; 42 43 #define pgd_val(x) ((x).pgd) 44 #define __pgd(x) ((pgd_t) { (x) }) 45 46 #if CONFIG_PGTABLE_LEVELS > 3 47 48 typedef struct { 49 unsigned long pud; 50 } pud_t; 51 52 #define pud_val(x) ((x).pud) 53 #define __pud(x) ((pud_t) { (x) }) 54 55 #endif 56 57 #if CONFIG_PGTABLE_LEVELS > 2 58 59 typedef struct { 60 unsigned long pmd; 61 } pmd_t; 62 63 #define pmd_val(x) ((x).pmd) 64 #define __pmd(x) ((pmd_t) { (x) }) 65 66 #endif 67 68 typedef struct { 69 #ifdef CONFIG_ARC_HAS_PAE40 70 unsigned long long pte; 71 #else 72 unsigned long pte; 73 #endif 74 } pte_t; 75 76 #define pte_val(x) ((x).pte) 77 #define __pte(x) ((pte_t) { (x) }) 78 79 typedef struct { 80 unsigned long pgprot; 81 } pgprot_t; 82 83 #define pgprot_val(x) ((x).pgprot) 84 #define __pgprot(x) ((pgprot_t) { (x) }) 85 #define pte_pgprot(x) __pgprot(pte_val(x)) 86 87 typedef struct page *pgtable_t; 88 89 /* 90 * When HIGHMEM is enabled we have holes in the memory map so we need 91 * pfn_valid() that takes into account the actual extents of the physical 92 * memory 93 */ 94 #ifdef CONFIG_HIGHMEM 95 96 extern unsigned long arch_pfn_offset; 97 #define ARCH_PFN_OFFSET arch_pfn_offset 98 99 extern int pfn_valid(unsigned long pfn); 100 #define pfn_valid pfn_valid 101 102 #else /* CONFIG_HIGHMEM */ 103 104 #define ARCH_PFN_OFFSET virt_to_pfn((void *)CONFIG_LINUX_RAM_BASE) 105 106 #endif /* CONFIG_HIGHMEM */ 107 108 /* 109 * __pa, __va, virt_to_page (ALERT: deprecated, don't use them) 110 * 111 * These macros have historically been misnamed 112 * virt here means link-address/program-address as embedded in object code. 113 * And for ARC, link-addr = physical address 114 */ 115 #define __pa(vaddr) ((unsigned long)(vaddr)) 116 #define __va(paddr) ((void *)((unsigned long)(paddr))) 117 118 /* 119 * Use virt_to_pfn with caution: 120 * If used in pte or paddr related macros, it could cause truncation 121 * in PAE40 builds 122 * As a rule of thumb, only use it in helpers starting with virt_ 123 * You have been warned ! 124 */ 125 static inline unsigned long virt_to_pfn(const void *kaddr) 126 { 127 return __pa(kaddr) >> PAGE_SHIFT; 128 } 129 130 #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) 131 #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) 132 133 /* Default Permissions for stack/heaps pages (Non Executable) */ 134 #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC 135 136 #define WANT_PAGE_VIRTUAL 1 137 138 #include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */ 139 #include <asm-generic/getorder.h> 140 141 #endif /* !__ASSEMBLER__ */ 142 143 #endif 144