tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 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
32extern void paging_init(void);
33extern void bootmem_init(void);
34extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
35extern void init_mem_pgprot(void);
36extern 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);
39extern void *fixmap_remap_fdt(phys_addr_t dt_phys);
40extern void mark_linear_text_alias_ro(void);
41
42#endif