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 } 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 31 extern void paging_init(void); 32 extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt); 33 extern void init_mem_pgprot(void); 34 extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys, 35 unsigned long virt, phys_addr_t size, 36 pgprot_t prot); 37 extern void *fixmap_remap_fdt(phys_addr_t dt_phys); 38 39 #endif 40