Catalin Marinas | 4f04d8f | 2012-03-05 11:49:27 +0000 | [diff] [blame] | 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 | |
Will Deacon | 5914b11 | 2017-08-10 14:10:28 +0100 | [diff] [blame] | 19 | |
| 20 | #define USER_ASID_FLAG (UL(1) << 48) |
Will Deacon | d7013ed | 2017-12-01 17:33:48 +0000 | [diff] [blame] | 21 | #define TTBR_ASID_MASK (UL(0xffff) << 48) |
Will Deacon | 5914b11 | 2017-08-10 14:10:28 +0100 | [diff] [blame] | 22 | |
Will Deacon | d6ca455 | 2017-11-14 13:58:08 +0000 | [diff] [blame] | 23 | #ifndef __ASSEMBLY__ |
| 24 | |
Catalin Marinas | 4f04d8f | 2012-03-05 11:49:27 +0000 | [diff] [blame] | 25 | typedef struct { |
Will Deacon | 5aec715 | 2015-10-06 18:46:24 +0100 | [diff] [blame] | 26 | atomic64_t id; |
| 27 | void *vdso; |
Catalin Marinas | 4f04d8f | 2012-03-05 11:49:27 +0000 | [diff] [blame] | 28 | } mm_context_t; |
| 29 | |
Will Deacon | 5aec715 | 2015-10-06 18:46:24 +0100 | [diff] [blame] | 30 | /* |
| 31 | * This macro is only used by the TLBI code, which cannot race with an |
| 32 | * ASID change and therefore doesn't need to reload the counter using |
| 33 | * atomic64_read. |
| 34 | */ |
| 35 | #define ASID(mm) ((mm)->context.id.counter & 0xffff) |
Catalin Marinas | 4f04d8f | 2012-03-05 11:49:27 +0000 | [diff] [blame] | 36 | |
Will Deacon | d6ca455 | 2017-11-14 13:58:08 +0000 | [diff] [blame] | 37 | static inline bool arm64_kernel_unmapped_at_el0(void) |
| 38 | { |
Will Deacon | f79ff2d | 2017-11-14 14:38:19 +0000 | [diff] [blame] | 39 | return IS_ENABLED(CONFIG_UNMAP_KERNEL_AT_EL0) && |
| 40 | cpus_have_cap(ARM64_UNMAP_KERNEL_AT_EL0); |
Will Deacon | d6ca455 | 2017-11-14 13:58:08 +0000 | [diff] [blame] | 41 | } |
| 42 | |
Catalin Marinas | 4f04d8f | 2012-03-05 11:49:27 +0000 | [diff] [blame] | 43 | extern void paging_init(void); |
David Daney | 3194ac6 | 2016-04-08 15:50:26 -0700 | [diff] [blame] | 44 | extern void bootmem_init(void); |
Catalin Marinas | 2475ff9 | 2012-10-23 14:55:08 +0100 | [diff] [blame] | 45 | extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt); |
Mark Salter | 0bf757c | 2014-04-07 15:39:51 -0700 | [diff] [blame] | 46 | extern void init_mem_pgprot(void); |
Ard Biesheuvel | 8ce837c | 2014-10-20 15:42:07 +0200 | [diff] [blame] | 47 | extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys, |
| 48 | unsigned long virt, phys_addr_t size, |
Ard Biesheuvel | 53e1b32 | 2016-06-29 14:51:26 +0200 | [diff] [blame] | 49 | pgprot_t prot, bool allow_block_mappings); |
Ard Biesheuvel | 61bd93c | 2015-06-01 13:40:32 +0200 | [diff] [blame] | 50 | extern void *fixmap_remap_fdt(phys_addr_t dt_phys); |
Catalin Marinas | 4f04d8f | 2012-03-05 11:49:27 +0000 | [diff] [blame] | 51 | |
Will Deacon | d6ca455 | 2017-11-14 13:58:08 +0000 | [diff] [blame] | 52 | #endif /* !__ASSEMBLY__ */ |
Catalin Marinas | 4f04d8f | 2012-03-05 11:49:27 +0000 | [diff] [blame] | 53 | #endif |