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 __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
33extern void init_mem_pgprot(void);
34extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
35			       unsigned long virt, phys_addr_t size,
36			       pgprot_t prot);
37extern void *fixmap_remap_fdt(phys_addr_t dt_phys);
38
39#endif
40