2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 #ifndef __ASM_ARC_PAGE_H
9 #define __ASM_ARC_PAGE_H
11 #include <uapi/asm/page.h>
15 #define clear_page(paddr) memset((paddr), 0, PAGE_SIZE)
16 #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
18 struct vm_area_struct
;
21 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
23 void copy_user_highpage(struct page
*to
, struct page
*from
,
24 unsigned long u_vaddr
, struct vm_area_struct
*vma
);
25 void clear_user_page(void *to
, unsigned long u_vaddr
, struct page
*page
);
27 #undef STRICT_MM_TYPECHECKS
29 #ifdef STRICT_MM_TYPECHECKS
31 * These are used to make use of C type-checking..
43 #define pte_val(x) ((x).pte)
44 #define pgd_val(x) ((x).pgd)
45 #define pgprot_val(x) ((x).pgprot)
47 #define __pte(x) ((pte_t) { (x) })
48 #define __pgd(x) ((pgd_t) { (x) })
49 #define __pgprot(x) ((pgprot_t) { (x) })
51 #define pte_pgprot(x) __pgprot(pte_val(x))
53 #else /* !STRICT_MM_TYPECHECKS */
55 #ifdef CONFIG_ARC_HAS_PAE40
56 typedef unsigned long long pte_t
;
58 typedef unsigned long pte_t
;
60 typedef unsigned long pgd_t
;
61 typedef unsigned long pgprot_t
;
63 #define pte_val(x) (x)
64 #define pgd_val(x) (x)
65 #define pgprot_val(x) (x)
68 #define __pgprot(x) (x)
69 #define pte_pgprot(x) (x)
73 typedef pte_t
* pgtable_t
;
76 * Use virt_to_pfn with caution:
77 * If used in pte or paddr related macros, it could cause truncation
79 * As a rule of thumb, only use it in helpers starting with virt_
80 * You have been warned !
82 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
84 #define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_LINK_BASE)
87 #define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
91 * __pa, __va, virt_to_page (ALERT: deprecated, don't use them)
93 * These macros have historically been misnamed
94 * virt here means link-address/program-address as embedded in object code.
95 * And for ARC, link-addr = physical address
97 #define __pa(vaddr) ((unsigned long)(vaddr))
98 #define __va(paddr) ((void *)((unsigned long)(paddr)))
100 #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
101 #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
103 /* Default Permissions for stack/heaps pages (Non Executable) */
104 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE)
106 #define WANT_PAGE_VIRTUAL 1
108 #include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */
109 #include <asm-generic/getorder.h>
111 #endif /* !__ASSEMBLY__ */
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