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         atomic64_t      id;
  21         void            *vdso;
  22         unsigned long   flags;
  23 } mm_context_t;
  24
  25 /*
  26  * This macro is only used by the TLBI code, which cannot race with an
  27  * ASID change and therefore doesn't need to reload the counter using
  28  * atomic64_read.
  29  */
  30 #define ASID(mm)        ((mm)->context.id.counter & 0xffff)
  31
  32 extern void paging_init(void);
  33 extern void bootmem_init(void);
  34 extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
  35 extern void init_mem_pgprot(void);
  36 extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
  37                                unsigned long virt, phys_addr_t size,
  38                                pgprot_t prot, bool page_mappings_only);
  39 extern void *fixmap_remap_fdt(phys_addr_t dt_phys);
  40 extern void mark_linear_text_alias_ro(void);
  41
  42 #endif