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| 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 | void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); |
| 36 | |
| 37 | typedef 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 | |
| 46 | typedef 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 | |
| 57 | typedef 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 | |
| 66 | typedef 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 | |
| 77 | typedef 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 | |
| 85 | typedef 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 | |
| 94 | extern unsigned long arch_pfn_offset; |
| 95 | #define ARCH_PFN_OFFSET arch_pfn_offset |
| 96 | |
| 97 | extern 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 | */ |
| 123 | static 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 /* !__ASSEMBLER__ */ |
| 140 | |
| 141 | #endif |
| 142 |
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