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141 lines
3.4 KiB
141 lines
3.4 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
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*/ |
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#ifndef __ASM_ARC_PAGE_H |
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#define __ASM_ARC_PAGE_H |
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#include <uapi/asm/page.h> |
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#ifdef CONFIG_ARC_HAS_PAE40 |
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#define MAX_POSSIBLE_PHYSMEM_BITS 40 |
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#define PAGE_MASK_PHYS (0xff00000000ull | PAGE_MASK) |
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#else /* CONFIG_ARC_HAS_PAE40 */ |
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#define MAX_POSSIBLE_PHYSMEM_BITS 32 |
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#define PAGE_MASK_PHYS PAGE_MASK |
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#endif /* CONFIG_ARC_HAS_PAE40 */ |
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#ifndef __ASSEMBLY__ |
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#define clear_page(paddr) memset((paddr), 0, PAGE_SIZE) |
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#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) |
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#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) |
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struct vm_area_struct; |
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struct page; |
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#define __HAVE_ARCH_COPY_USER_HIGHPAGE |
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void copy_user_highpage(struct page *to, struct page *from, |
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unsigned long u_vaddr, struct vm_area_struct *vma); |
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void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); |
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#undef STRICT_MM_TYPECHECKS |
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#ifdef STRICT_MM_TYPECHECKS |
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/* |
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* These are used to make use of C type-checking.. |
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*/ |
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typedef struct { |
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#ifdef CONFIG_ARC_HAS_PAE40 |
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unsigned long long pte; |
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#else |
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unsigned long pte; |
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#endif |
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} pte_t; |
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typedef struct { |
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unsigned long pgd; |
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} pgd_t; |
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typedef struct { |
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unsigned long pgprot; |
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} pgprot_t; |
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#define pte_val(x) ((x).pte) |
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#define pgd_val(x) ((x).pgd) |
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#define pgprot_val(x) ((x).pgprot) |
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#define __pte(x) ((pte_t) { (x) }) |
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#define __pgd(x) ((pgd_t) { (x) }) |
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#define __pgprot(x) ((pgprot_t) { (x) }) |
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#define pte_pgprot(x) __pgprot(pte_val(x)) |
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#else /* !STRICT_MM_TYPECHECKS */ |
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#ifdef CONFIG_ARC_HAS_PAE40 |
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typedef unsigned long long pte_t; |
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#else |
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typedef unsigned long pte_t; |
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#endif |
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typedef unsigned long pgd_t; |
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typedef unsigned long pgprot_t; |
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#define pte_val(x) (x) |
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#define pgd_val(x) (x) |
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#define pgprot_val(x) (x) |
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#define __pte(x) (x) |
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#define __pgd(x) (x) |
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#define __pgprot(x) (x) |
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#define pte_pgprot(x) (x) |
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#endif |
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typedef pte_t * pgtable_t; |
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/* |
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* Use virt_to_pfn with caution: |
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* If used in pte or paddr related macros, it could cause truncation |
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* in PAE40 builds |
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* As a rule of thumb, only use it in helpers starting with virt_ |
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* You have been warned ! |
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*/ |
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#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) |
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/* |
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* When HIGHMEM is enabled we have holes in the memory map so we need |
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* pfn_valid() that takes into account the actual extents of the physical |
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* memory |
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*/ |
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#ifdef CONFIG_HIGHMEM |
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extern unsigned long arch_pfn_offset; |
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#define ARCH_PFN_OFFSET arch_pfn_offset |
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extern int pfn_valid(unsigned long pfn); |
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#define pfn_valid pfn_valid |
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#else /* CONFIG_HIGHMEM */ |
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#define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_RAM_BASE) |
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#define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr) |
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#endif /* CONFIG_HIGHMEM */ |
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/* |
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* __pa, __va, virt_to_page (ALERT: deprecated, don't use them) |
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* |
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* These macros have historically been misnamed |
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* virt here means link-address/program-address as embedded in object code. |
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* And for ARC, link-addr = physical address |
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*/ |
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#define __pa(vaddr) ((unsigned long)(vaddr)) |
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#define __va(paddr) ((void *)((unsigned long)(paddr))) |
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#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) |
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#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) |
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/* Default Permissions for stack/heaps pages (Non Executable) */ |
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#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC |
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#define WANT_PAGE_VIRTUAL 1 |
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#include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */ |
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#include <asm-generic/getorder.h> |
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#endif /* !__ASSEMBLY__ */ |
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#endif
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