14f04d8f0SCatalin Marinas /* 24f04d8f0SCatalin Marinas * Copyright (C) 2012 ARM Ltd. 34f04d8f0SCatalin Marinas * 44f04d8f0SCatalin Marinas * This program is free software; you can redistribute it and/or modify 54f04d8f0SCatalin Marinas * it under the terms of the GNU General Public License version 2 as 64f04d8f0SCatalin Marinas * published by the Free Software Foundation. 74f04d8f0SCatalin Marinas * 84f04d8f0SCatalin Marinas * This program is distributed in the hope that it will be useful, 94f04d8f0SCatalin Marinas * but WITHOUT ANY WARRANTY; without even the implied warranty of 104f04d8f0SCatalin Marinas * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 114f04d8f0SCatalin Marinas * GNU General Public License for more details. 124f04d8f0SCatalin Marinas * 134f04d8f0SCatalin Marinas * You should have received a copy of the GNU General Public License 144f04d8f0SCatalin Marinas * along with this program. If not, see <http://www.gnu.org/licenses/>. 154f04d8f0SCatalin Marinas */ 164f04d8f0SCatalin Marinas #ifndef __ASM_MMU_H 174f04d8f0SCatalin Marinas #define __ASM_MMU_H 184f04d8f0SCatalin Marinas 195ce93ab6SYury Norov #define MMCF_AARCH32 0x1 /* mm context flag for AArch32 executables */ 200c8ea531SWill Deacon #define USER_ASID_FLAG (UL(1) << 48) 21*b519538dSWill Deacon #define TTBR_ASID_MASK (UL(0xffff) << 48) 225ce93ab6SYury Norov 23fc0e1299SWill Deacon #ifndef __ASSEMBLY__ 24fc0e1299SWill Deacon 254f04d8f0SCatalin Marinas typedef struct { 265aec715dSWill Deacon atomic64_t id; 274f04d8f0SCatalin Marinas void *vdso; 2806beb72fSPratyush Anand unsigned long flags; 294f04d8f0SCatalin Marinas } mm_context_t; 304f04d8f0SCatalin Marinas 315aec715dSWill Deacon /* 325aec715dSWill Deacon * This macro is only used by the TLBI code, which cannot race with an 335aec715dSWill Deacon * ASID change and therefore doesn't need to reload the counter using 345aec715dSWill Deacon * atomic64_read. 355aec715dSWill Deacon */ 365aec715dSWill Deacon #define ASID(mm) ((mm)->context.id.counter & 0xffff) 374f04d8f0SCatalin Marinas 38fc0e1299SWill Deacon static inline bool arm64_kernel_unmapped_at_el0(void) 39fc0e1299SWill Deacon { 40ea1e3de8SWill Deacon return IS_ENABLED(CONFIG_UNMAP_KERNEL_AT_EL0) && 41ea1e3de8SWill Deacon cpus_have_const_cap(ARM64_UNMAP_KERNEL_AT_EL0); 42fc0e1299SWill Deacon } 43fc0e1299SWill Deacon 444f04d8f0SCatalin Marinas extern void paging_init(void); 453194ac6eSDavid Daney extern void bootmem_init(void); 462475ff9dSCatalin Marinas extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt); 470bf757c7SMark Salter extern void init_mem_pgprot(void); 488ce837ceSArd Biesheuvel extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys, 498ce837ceSArd Biesheuvel unsigned long virt, phys_addr_t size, 50f14c66ceSArd Biesheuvel pgprot_t prot, bool page_mappings_only); 5161bd93ceSArd Biesheuvel extern void *fixmap_remap_fdt(phys_addr_t dt_phys); 525ea5306cSArd Biesheuvel extern void mark_linear_text_alias_ro(void); 534f04d8f0SCatalin Marinas 54fc0e1299SWill Deacon #endif /* !__ASSEMBLY__ */ 554f04d8f0SCatalin Marinas #endif 56