1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 23ff1559eSRussell King #ifdef CONFIG_MMU 3ed8fd218SJoonsoo Kim #include <linux/list.h> 4ed8fd218SJoonsoo Kim #include <linux/vmalloc.h> 5ca5999fdSMike Rapoport #include <linux/pgtable.h> 6b4b20ad8SRussell King 75f0fbf9eSNicolas Pitre /* the upper-most page table pointer */ 81b2e2b73SRussell King extern pmd_t *top_pmd; 91b2e2b73SRussell King 105f41f919SMarek Szyprowski extern int icache_size; 115f41f919SMarek Szyprowski 12de27c308SRussell King /* 13de27c308SRussell King * 0xffff8000 to 0xffffffff is reserved for any ARM architecture 14de27c308SRussell King * specific hacks for copying pages efficiently, while 0xffff4000 15de27c308SRussell King * is reserved for VIPT aliasing flushing by generic code. 16de27c308SRussell King * 17de27c308SRussell King * Note that we don't allow VIPT aliasing caches with SMP. 18de27c308SRussell King */ 19de27c308SRussell King #define COPYPAGE_MINICACHE 0xffff8000 20de27c308SRussell King #define COPYPAGE_V6_FROM 0xffff8000 21de27c308SRussell King #define COPYPAGE_V6_TO 0xffffc000 22de27c308SRussell King /* PFN alias flushing, for VIPT caches */ 23de27c308SRussell King #define FLUSH_ALIAS_START 0xffff4000 24de27c308SRussell King set_top_pte(unsigned long va,pte_t pte)2567ece144SRussell Kingstatic inline void set_top_pte(unsigned long va, pte_t pte) 2667ece144SRussell King { 2760db4fcfSRussell King pte_t *ptep = pte_offset_kernel(top_pmd, va); 2860db4fcfSRussell King set_pte_ext(ptep, pte, 0); 2967ece144SRussell King local_flush_tlb_kernel_page(va); 3067ece144SRussell King } 3167ece144SRussell King get_top_pte(unsigned long va)320d31fe47SRussell Kingstatic inline pte_t get_top_pte(unsigned long va) 330d31fe47SRussell King { 3460db4fcfSRussell King pte_t *ptep = pte_offset_kernel(top_pmd, va); 3560db4fcfSRussell King return *ptep; 360d31fe47SRussell King } 370d31fe47SRussell King 38b29e9f5eSRussell King struct mem_type { 39f6e3354dSRussell King pteval_t prot_pte; 404d9c5b89SChristoffer Dall pteval_t prot_pte_s2; 41442e70c0SCatalin Marinas pmdval_t prot_l1; 42442e70c0SCatalin Marinas pmdval_t prot_sect; 43b29e9f5eSRussell King unsigned int domain; 44b29e9f5eSRussell King }; 45b29e9f5eSRussell King 46b29e9f5eSRussell King const struct mem_type *get_mem_type(unsigned int type); 47b29e9f5eSRussell King 48*8b5989f3SMatthew Wilcox (Oracle) void __flush_dcache_folio(struct address_space *mapping, struct folio *folio); 497b0a1003SRussell King 50576d2f25SNicolas Pitre /* 51576d2f25SNicolas Pitre * ARM specific vm_struct->flags bits. 52576d2f25SNicolas Pitre */ 53576d2f25SNicolas Pitre 54576d2f25SNicolas Pitre /* (super)section-mapped I/O regions used by ioremap()/iounmap() */ 55576d2f25SNicolas Pitre #define VM_ARM_SECTION_MAPPING 0x80000000 56576d2f25SNicolas Pitre 57576d2f25SNicolas Pitre /* permanent static mappings from iotable_init() */ 58576d2f25SNicolas Pitre #define VM_ARM_STATIC_MAPPING 0x40000000 59576d2f25SNicolas Pitre 60a849088aSRussell King /* empty mapping */ 61a849088aSRussell King #define VM_ARM_EMPTY_MAPPING 0x20000000 62a849088aSRussell King 63576d2f25SNicolas Pitre /* mapping type (attributes) for permanent static mappings */ 64576d2f25SNicolas Pitre #define VM_ARM_MTYPE(mt) ((mt) << 20) 65576d2f25SNicolas Pitre #define VM_ARM_MTYPE_MASK (0x1f << 20) 66576d2f25SNicolas Pitre 67ed8fd218SJoonsoo Kim 68ed8fd218SJoonsoo Kim struct static_vm { 69ed8fd218SJoonsoo Kim struct vm_struct vm; 70ed8fd218SJoonsoo Kim struct list_head list; 71ed8fd218SJoonsoo Kim }; 72ed8fd218SJoonsoo Kim 73ed8fd218SJoonsoo Kim extern struct list_head static_vmlist; 74ed8fd218SJoonsoo Kim extern struct static_vm *find_static_vm_vaddr(void *vaddr); 75ed8fd218SJoonsoo Kim extern __init void add_static_vm_early(struct static_vm *svm); 76ed8fd218SJoonsoo Kim 773ff1559eSRussell King #endif 783ff1559eSRussell King 79022ae537SRussell King #ifdef CONFIG_ZONE_DMA 804986e5c7SMarek Szyprowski extern phys_addr_t arm_dma_limit; 814dcfa600SRussell King extern unsigned long arm_dma_pfn_limit; 82022ae537SRussell King #else 8309b2ad13SRussell King #define arm_dma_limit ((phys_addr_t)~0) 844dcfa600SRussell King #define arm_dma_pfn_limit (~0ul >> PAGE_SHIFT) 85022ae537SRussell King #endif 86022ae537SRussell King 87c7909509SMarek Szyprowski extern phys_addr_t arm_lowmem_limit; 88c7909509SMarek Szyprowski 898d717a52SRussell King void __init bootmem_init(void); 902778f620SRussell King void arm_mm_memblock_reserve(void); 91229a08a4SKees Cook #ifdef CONFIG_CMA_AREAS 92c7909509SMarek Szyprowski void dma_contiguous_remap(void); 93229a08a4SKees Cook #else dma_contiguous_remap(void)94229a08a4SKees Cookstatic inline void dma_contiguous_remap(void) { } 95229a08a4SKees Cook #endif 96b4b20ad8SRussell King 97b4b20ad8SRussell King unsigned long __clear_cr(unsigned long mask); 98