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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 | /* 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> #ifndef __ASSEMBLY__ #define clear_page(paddr) memset((paddr), 0, PAGE_SIZE) #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); #undef STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS /* * These are used to make use of C type-checking.. */ typedef struct { #ifdef CONFIG_ARC_HAS_PAE40 unsigned long long pte; #else unsigned long pte; #endif } pte_t; typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pte_val(x) ((x).pte) #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) }) #define __pgd(x) ((pgd_t) { (x) }) #define __pgprot(x) ((pgprot_t) { (x) }) #define pte_pgprot(x) __pgprot(pte_val(x)) #else /* !STRICT_MM_TYPECHECKS */ #ifdef CONFIG_ARC_HAS_PAE40 typedef unsigned long long pte_t; #else typedef unsigned long pte_t; #endif typedef unsigned long pgd_t; typedef unsigned long pgprot_t; #define pte_val(x) (x) #define pgd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) #define __pgd(x) (x) #define __pgprot(x) (x) #define pte_pgprot(x) (x) #endif typedef pte_t * 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) #define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_RAM_BASE) #ifdef CONFIG_FLATMEM #define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr) #endif /* * __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_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #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 |