Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
3ff1559e | 2 | #ifdef CONFIG_MMU |
ed8fd218 JK |
3 | #include <linux/list.h> |
4 | #include <linux/vmalloc.h> | |
3ff1559e | 5 | |
b4b20ad8 RK |
6 | #include <asm/pgtable.h> |
7 | ||
5f0fbf9e | 8 | /* the upper-most page table pointer */ |
1b2e2b73 RK |
9 | extern pmd_t *top_pmd; |
10 | ||
de27c308 RK |
11 | /* |
12 | * 0xffff8000 to 0xffffffff is reserved for any ARM architecture | |
13 | * specific hacks for copying pages efficiently, while 0xffff4000 | |
14 | * is reserved for VIPT aliasing flushing by generic code. | |
15 | * | |
16 | * Note that we don't allow VIPT aliasing caches with SMP. | |
17 | */ | |
18 | #define COPYPAGE_MINICACHE 0xffff8000 | |
19 | #define COPYPAGE_V6_FROM 0xffff8000 | |
20 | #define COPYPAGE_V6_TO 0xffffc000 | |
21 | /* PFN alias flushing, for VIPT caches */ | |
22 | #define FLUSH_ALIAS_START 0xffff4000 | |
23 | ||
67ece144 RK |
24 | static inline void set_top_pte(unsigned long va, pte_t pte) |
25 | { | |
60db4fcf RK |
26 | pte_t *ptep = pte_offset_kernel(top_pmd, va); |
27 | set_pte_ext(ptep, pte, 0); | |
67ece144 RK |
28 | local_flush_tlb_kernel_page(va); |
29 | } | |
30 | ||
0d31fe47 RK |
31 | static inline pte_t get_top_pte(unsigned long va) |
32 | { | |
60db4fcf RK |
33 | pte_t *ptep = pte_offset_kernel(top_pmd, va); |
34 | return *ptep; | |
0d31fe47 RK |
35 | } |
36 | ||
1b2e2b73 RK |
37 | static inline pmd_t *pmd_off_k(unsigned long virt) |
38 | { | |
cc780af5 | 39 | return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt); |
1b2e2b73 RK |
40 | } |
41 | ||
b29e9f5e | 42 | struct mem_type { |
f6e3354d | 43 | pteval_t prot_pte; |
4d9c5b89 | 44 | pteval_t prot_pte_s2; |
442e70c0 CM |
45 | pmdval_t prot_l1; |
46 | pmdval_t prot_sect; | |
b29e9f5e RK |
47 | unsigned int domain; |
48 | }; | |
49 | ||
50 | const struct mem_type *get_mem_type(unsigned int type); | |
51 | ||
7b0a1003 RK |
52 | extern void __flush_dcache_page(struct address_space *mapping, struct page *page); |
53 | ||
576d2f25 NP |
54 | /* |
55 | * ARM specific vm_struct->flags bits. | |
56 | */ | |
57 | ||
58 | /* (super)section-mapped I/O regions used by ioremap()/iounmap() */ | |
59 | #define VM_ARM_SECTION_MAPPING 0x80000000 | |
60 | ||
61 | /* permanent static mappings from iotable_init() */ | |
62 | #define VM_ARM_STATIC_MAPPING 0x40000000 | |
63 | ||
a849088a RK |
64 | /* empty mapping */ |
65 | #define VM_ARM_EMPTY_MAPPING 0x20000000 | |
66 | ||
576d2f25 NP |
67 | /* mapping type (attributes) for permanent static mappings */ |
68 | #define VM_ARM_MTYPE(mt) ((mt) << 20) | |
69 | #define VM_ARM_MTYPE_MASK (0x1f << 20) | |
70 | ||
e9da6e99 MS |
71 | /* consistent regions used by dma_alloc_attrs() */ |
72 | #define VM_ARM_DMA_CONSISTENT 0x20000000 | |
73 | ||
ed8fd218 JK |
74 | |
75 | struct static_vm { | |
76 | struct vm_struct vm; | |
77 | struct list_head list; | |
78 | }; | |
79 | ||
80 | extern struct list_head static_vmlist; | |
81 | extern struct static_vm *find_static_vm_vaddr(void *vaddr); | |
82 | extern __init void add_static_vm_early(struct static_vm *svm); | |
83 | ||
3ff1559e RK |
84 | #endif |
85 | ||
022ae537 | 86 | #ifdef CONFIG_ZONE_DMA |
4986e5c7 | 87 | extern phys_addr_t arm_dma_limit; |
4dcfa600 | 88 | extern unsigned long arm_dma_pfn_limit; |
022ae537 | 89 | #else |
09b2ad13 | 90 | #define arm_dma_limit ((phys_addr_t)~0) |
4dcfa600 | 91 | #define arm_dma_pfn_limit (~0ul >> PAGE_SHIFT) |
022ae537 RK |
92 | #endif |
93 | ||
c7909509 MS |
94 | extern phys_addr_t arm_lowmem_limit; |
95 | ||
8d717a52 | 96 | void __init bootmem_init(void); |
2778f620 | 97 | void arm_mm_memblock_reserve(void); |
c7909509 | 98 | void dma_contiguous_remap(void); |
b4b20ad8 RK |
99 | |
100 | unsigned long __clear_cr(unsigned long mask); |