1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifdef CONFIG_MMU |
3 | #include <linux/list.h> |
4 | #include <linux/vmalloc.h> |
5 | #include <linux/pgtable.h> |
6 | |
7 | /* the upper-most page table pointer */ |
8 | extern pmd_t *top_pmd; |
9 | |
10 | extern int icache_size; |
11 | |
12 | /* |
13 | * 0xffff8000 to 0xffffffff is reserved for any ARM architecture |
14 | * specific hacks for copying pages efficiently, while 0xffff4000 |
15 | * is reserved for VIPT aliasing flushing by generic code. |
16 | * |
17 | * Note that we don't allow VIPT aliasing caches with SMP. |
18 | */ |
19 | #define COPYPAGE_MINICACHE 0xffff8000 |
20 | #define COPYPAGE_V6_FROM 0xffff8000 |
21 | #define COPYPAGE_V6_TO 0xffffc000 |
22 | /* PFN alias flushing, for VIPT caches */ |
23 | #define FLUSH_ALIAS_START 0xffff4000 |
24 | |
25 | static inline void set_top_pte(unsigned long va, pte_t pte) |
26 | { |
27 | pte_t *ptep = pte_offset_kernel(pmd: top_pmd, address: va); |
28 | set_pte_ext(ptep, pte, 0); |
29 | local_flush_tlb_kernel_page(va); |
30 | } |
31 | |
32 | static inline pte_t get_top_pte(unsigned long va) |
33 | { |
34 | pte_t *ptep = pte_offset_kernel(pmd: top_pmd, address: va); |
35 | return *ptep; |
36 | } |
37 | |
38 | struct mem_type { |
39 | pteval_t prot_pte; |
40 | pteval_t prot_pte_s2; |
41 | pmdval_t prot_l1; |
42 | pmdval_t prot_sect; |
43 | unsigned int domain; |
44 | }; |
45 | |
46 | const struct mem_type *get_mem_type(unsigned int type); |
47 | |
48 | void __flush_dcache_folio(struct address_space *mapping, struct folio *folio); |
49 | |
50 | /* |
51 | * ARM specific vm_struct->flags bits. |
52 | */ |
53 | |
54 | /* (super)section-mapped I/O regions used by ioremap()/iounmap() */ |
55 | #define VM_ARM_SECTION_MAPPING 0x80000000 |
56 | |
57 | /* permanent static mappings from iotable_init() */ |
58 | #define VM_ARM_STATIC_MAPPING 0x40000000 |
59 | |
60 | /* empty mapping */ |
61 | #define VM_ARM_EMPTY_MAPPING 0x20000000 |
62 | |
63 | /* mapping type (attributes) for permanent static mappings */ |
64 | #define VM_ARM_MTYPE(mt) ((mt) << 20) |
65 | #define VM_ARM_MTYPE_MASK (0x1f << 20) |
66 | |
67 | |
68 | struct static_vm { |
69 | struct vm_struct vm; |
70 | struct list_head list; |
71 | }; |
72 | |
73 | extern struct list_head static_vmlist; |
74 | extern struct static_vm *find_static_vm_vaddr(void *vaddr); |
75 | extern __init void add_static_vm_early(struct static_vm *svm); |
76 | |
77 | #endif |
78 | |
79 | #ifdef CONFIG_ZONE_DMA |
80 | extern phys_addr_t arm_dma_limit; |
81 | extern unsigned long arm_dma_pfn_limit; |
82 | #else |
83 | #define arm_dma_limit ((phys_addr_t)~0) |
84 | #define arm_dma_pfn_limit (~0ul >> PAGE_SHIFT) |
85 | #endif |
86 | |
87 | extern phys_addr_t arm_lowmem_limit; |
88 | |
89 | void __init bootmem_init(void); |
90 | void arm_mm_memblock_reserve(void); |
91 | #ifdef CONFIG_CMA_AREAS |
92 | void dma_contiguous_remap(void); |
93 | #else |
94 | static inline void dma_contiguous_remap(void) { } |
95 | #endif |
96 | |
97 | unsigned long __clear_cr(unsigned long mask); |
98 | |