mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 03:33:59 +08:00
1d18c47c73
This patch adds support for the handling of the MMU faults (exception entry code introduced by a previous patch) and page table management. The user translation table is pointed to by TTBR0 and the kernel one (swapper_pg_dir) by TTBR1. There is no translation information shared or address space overlapping between user and kernel page tables. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
35 lines
1.0 KiB
C
35 lines
1.0 KiB
C
/*
|
|
* Based on arch/arm/mm/copypage.c
|
|
*
|
|
* Copyright (C) 2002 Deep Blue Solutions Ltd, All Rights Reserved.
|
|
* 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/>.
|
|
*/
|
|
|
|
#include <linux/mm.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/cacheflush.h>
|
|
|
|
void __cpu_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr)
|
|
{
|
|
copy_page(kto, kfrom);
|
|
__flush_dcache_area(kto, PAGE_SIZE);
|
|
}
|
|
|
|
void __cpu_clear_user_page(void *kaddr, unsigned long vaddr)
|
|
{
|
|
clear_page(kaddr);
|
|
}
|