arch/arm64/include/asm/mmu.h

   1 /*
   2  * Copyright (C) 2012 ARM Ltd.
   3  *
   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.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16 #ifndef __ASM_MMU_H
  17 #define __ASM_MMU_H
  18
  19 typedef struct {
  20         unsigned int id;
  21         raw_spinlock_t id_lock;
  22         void *vdso;
  23 } mm_context_t;
  24
  25 #define INIT_MM_CONTEXT(name) \
  26         .context.id_lock = __RAW_SPIN_LOCK_UNLOCKED(name.context.id_lock),
  27
  28 #define ASID(mm)        ((mm)->context.id & 0xffff)
  29
  30 extern void paging_init(void);
  31 extern void setup_mm_for_reboot(void);
  32 extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
  33 extern void init_mem_pgprot(void);
  34 /* create an identity mapping for memory (or io if map_io is true) */
  35 extern void create_id_mapping(phys_addr_t addr, phys_addr_t size, int map_io);
  36
  37 #endif