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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm64/include/asm/page.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm64/include/asm/page.h')
-rw-r--r-- | kernel/arch/arm64/include/asm/page.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/kernel/arch/arm64/include/asm/page.h b/kernel/arch/arm64/include/asm/page.h new file mode 100644 index 000000000..7d9c7e4a4 --- /dev/null +++ b/kernel/arch/arm64/include/asm/page.h @@ -0,0 +1,78 @@ +/* + * Based on arch/arm/include/asm/page.h + * + * Copyright (C) 1995-2003 Russell King + * Copyright (C) 2012 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#ifndef __ASM_PAGE_H +#define __ASM_PAGE_H + +/* PAGE_SHIFT determines the page size */ +#ifdef CONFIG_ARM64_64K_PAGES +#define PAGE_SHIFT 16 +#else +#define PAGE_SHIFT 12 +#endif +#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE-1)) + +/* + * The idmap and swapper page tables need some space reserved in the kernel + * image. Both require pgd, pud (4 levels only) and pmd tables to (section) + * map the kernel. With the 64K page configuration, swapper and idmap need to + * map to pte level. The swapper also maps the FDT (see __create_page_tables + * for more information). Note that the number of ID map translation levels + * could be increased on the fly if system RAM is out of reach for the default + * VA range, so 3 pages are reserved in all cases. + */ +#ifdef CONFIG_ARM64_64K_PAGES +#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS) +#else +#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS - 1) +#endif + +#define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE) +#define IDMAP_DIR_SIZE (3 * PAGE_SIZE) + +#ifndef __ASSEMBLY__ + +#include <asm/pgtable-types.h> + +extern void __cpu_clear_user_page(void *p, unsigned long user); +extern void __cpu_copy_user_page(void *to, const void *from, + unsigned long user); +extern void copy_page(void *to, const void *from); +extern void clear_page(void *to); + +#define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr) +#define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) + +typedef struct page *pgtable_t; + +#ifdef CONFIG_HAVE_ARCH_PFN_VALID +extern int pfn_valid(unsigned long); +#endif + +#include <asm/memory.h> + +#endif /* !__ASSEMBLY__ */ + +#define VM_DATA_DEFAULT_FLAGS \ + (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \ + VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#include <asm-generic/getorder.h> + +#endif |