2 * Based on arch/arm/include/asm/page.h
4 * Copyright (C) 1995-2003 Russell King
5 * Copyright (C) 2012 ARM Ltd.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 /* PAGE_SHIFT determines the page size */
23 #ifdef CONFIG_ARM64_64K_PAGES
28 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
29 #define PAGE_MASK (~(PAGE_SIZE-1))
32 * The idmap and swapper page tables need some space reserved in the kernel
33 * image. Both require pgd, pud (4 levels only) and pmd tables to (section)
34 * map the kernel. With the 64K page configuration, swapper and idmap need to
35 * map to pte level. The swapper also maps the FDT (see __create_page_tables
36 * for more information).
38 #ifdef CONFIG_ARM64_64K_PAGES
39 #define SWAPPER_PGTABLE_LEVELS (CONFIG_ARM64_PGTABLE_LEVELS)
41 #define SWAPPER_PGTABLE_LEVELS (CONFIG_ARM64_PGTABLE_LEVELS - 1)
44 #define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE)
45 #define IDMAP_DIR_SIZE (SWAPPER_DIR_SIZE)
49 #include <asm/pgtable-types.h>
51 extern void __cpu_clear_user_page(void *p
, unsigned long user
);
52 extern void __cpu_copy_user_page(void *to
, const void *from
,
54 extern void copy_page(void *to
, const void *from
);
55 extern void clear_page(void *to
);
57 #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr)
58 #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr)
60 typedef struct page
*pgtable_t
;
62 #ifdef CONFIG_HAVE_ARCH_PFN_VALID
63 extern int pfn_valid(unsigned long);
66 #include <asm/memory.h>
68 #endif /* !__ASSEMBLY__ */
70 #define VM_DATA_DEFAULT_FLAGS \
71 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
72 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
74 #include <asm-generic/getorder.h>