LXR linux/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
  19typedef struct {
  20        atomic64_t      id;
  21        void            *vdso;
  22} mm_context_t;
  23
  24/*
  25 * This macro is only used by the TLBI code, which cannot race with an
  26 * ASID change and therefore doesn't need to reload the counter using
  27 * atomic64_read.
  28 */
  29#define ASID(mm)        ((mm)->context.id.counter & 0xffff)
  30
  31extern void paging_init(void);
  32extern void bootmem_init(void);
  33extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
  34extern void init_mem_pgprot(void);
  35extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
  36                               unsigned long virt, phys_addr_t size,
  37                               pgprot_t prot, bool allow_block_mappings);
  38extern void *fixmap_remap_fdt(phys_addr_t dt_phys);
  39
  40#endif
  41