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 28struct vm_area_struct; 29struct page; 30 31#define __HAVE_ARCH_COPY_USER_HIGHPAGE 32 33void copy_user_highpage(struct page *to, struct page *from, 34 unsigned long u_vaddr, struct vm_area_struct *vma); 35void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); 36 37typedef 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 46typedef 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 57typedef 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 66typedef 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 77typedef 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 85typedef 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 94extern unsigned long arch_pfn_offset; 95#define ARCH_PFN_OFFSET arch_pfn_offset 96 97extern 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 */ 123static 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