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