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 #ifndef __ASSEMBLY__ 11 12 #define clear_page(paddr) memset((paddr), 0, PAGE_SIZE) 13 #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 14 15 struct vm_area_struct; 16 struct page; 17 18 #define __HAVE_ARCH_COPY_USER_HIGHPAGE 19 20 void copy_user_highpage(struct page *to, struct page *from, 21 unsigned long u_vaddr, struct vm_area_struct *vma); 22 void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); 23 24 #undef STRICT_MM_TYPECHECKS 25 26 #ifdef STRICT_MM_TYPECHECKS 27 /* 28 * These are used to make use of C type-checking.. 29 */ 30 typedef struct { 31 #ifdef CONFIG_ARC_HAS_PAE40 32 unsigned long long pte; 33 #else 34 unsigned long pte; 35 #endif 36 } pte_t; 37 typedef struct { 38 unsigned long pgd; 39 } pgd_t; 40 typedef struct { 41 unsigned long pgprot; 42 } pgprot_t; 43 44 #define pte_val(x) ((x).pte) 45 #define pgd_val(x) ((x).pgd) 46 #define pgprot_val(x) ((x).pgprot) 47 48 #define __pte(x) ((pte_t) { (x) }) 49 #define __pgd(x) ((pgd_t) { (x) }) 50 #define __pgprot(x) ((pgprot_t) { (x) }) 51 52 #define pte_pgprot(x) __pgprot(pte_val(x)) 53 54 #else /* !STRICT_MM_TYPECHECKS */ 55 56 #ifdef CONFIG_ARC_HAS_PAE40 57 typedef unsigned long long pte_t; 58 #else 59 typedef unsigned long pte_t; 60 #endif 61 typedef unsigned long pgd_t; 62 typedef unsigned long pgprot_t; 63 64 #define pte_val(x) (x) 65 #define pgd_val(x) (x) 66 #define pgprot_val(x) (x) 67 #define __pte(x) (x) 68 #define __pgd(x) (x) 69 #define __pgprot(x) (x) 70 #define pte_pgprot(x) (x) 71 72 #endif 73 74 typedef pte_t * pgtable_t; 75 76 /* 77 * Use virt_to_pfn with caution: 78 * If used in pte or paddr related macros, it could cause truncation 79 * in PAE40 builds 80 * As a rule of thumb, only use it in helpers starting with virt_ 81 * You have been warned ! 82 */ 83 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 84 85 #define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_RAM_BASE) 86 87 #ifdef CONFIG_FLATMEM 88 #define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr) 89 #endif 90 91 /* 92 * __pa, __va, virt_to_page (ALERT: deprecated, don't use them) 93 * 94 * These macros have historically been misnamed 95 * virt here means link-address/program-address as embedded in object code. 96 * And for ARC, link-addr = physical address 97 */ 98 #define __pa(vaddr) ((unsigned long)(vaddr)) 99 #define __va(paddr) ((void *)((unsigned long)(paddr))) 100 101 #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) 102 #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) 103 104 /* Default Permissions for stack/heaps pages (Non Executable) */ 105 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 106 107 #define WANT_PAGE_VIRTUAL 1 108 109 #include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */ 110 #include <asm-generic/getorder.h> 111 112 #endif /* !__ASSEMBLY__ */ 113 114 #endif 115