Commit | Line | Data |
---|---|---|
3ff1559e RK |
1 | #ifdef CONFIG_MMU |
2 | ||
5f0fbf9e | 3 | /* the upper-most page table pointer */ |
1b2e2b73 RK |
4 | extern pmd_t *top_pmd; |
5 | ||
de27c308 RK |
6 | /* |
7 | * 0xffff8000 to 0xffffffff is reserved for any ARM architecture | |
8 | * specific hacks for copying pages efficiently, while 0xffff4000 | |
9 | * is reserved for VIPT aliasing flushing by generic code. | |
10 | * | |
11 | * Note that we don't allow VIPT aliasing caches with SMP. | |
12 | */ | |
13 | #define COPYPAGE_MINICACHE 0xffff8000 | |
14 | #define COPYPAGE_V6_FROM 0xffff8000 | |
15 | #define COPYPAGE_V6_TO 0xffffc000 | |
16 | /* PFN alias flushing, for VIPT caches */ | |
17 | #define FLUSH_ALIAS_START 0xffff4000 | |
18 | ||
67ece144 RK |
19 | static inline void set_top_pte(unsigned long va, pte_t pte) |
20 | { | |
60db4fcf RK |
21 | pte_t *ptep = pte_offset_kernel(top_pmd, va); |
22 | set_pte_ext(ptep, pte, 0); | |
67ece144 RK |
23 | local_flush_tlb_kernel_page(va); |
24 | } | |
25 | ||
0d31fe47 RK |
26 | static inline pte_t get_top_pte(unsigned long va) |
27 | { | |
60db4fcf RK |
28 | pte_t *ptep = pte_offset_kernel(top_pmd, va); |
29 | return *ptep; | |
0d31fe47 RK |
30 | } |
31 | ||
1b2e2b73 RK |
32 | static inline pmd_t *pmd_off_k(unsigned long virt) |
33 | { | |
cc780af5 | 34 | return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt); |
1b2e2b73 RK |
35 | } |
36 | ||
b29e9f5e | 37 | struct mem_type { |
f6e3354d | 38 | pteval_t prot_pte; |
442e70c0 CM |
39 | pmdval_t prot_l1; |
40 | pmdval_t prot_sect; | |
b29e9f5e RK |
41 | unsigned int domain; |
42 | }; | |
43 | ||
44 | const struct mem_type *get_mem_type(unsigned int type); | |
45 | ||
7b0a1003 RK |
46 | extern void __flush_dcache_page(struct address_space *mapping, struct page *page); |
47 | ||
576d2f25 NP |
48 | /* |
49 | * ARM specific vm_struct->flags bits. | |
50 | */ | |
51 | ||
52 | /* (super)section-mapped I/O regions used by ioremap()/iounmap() */ | |
53 | #define VM_ARM_SECTION_MAPPING 0x80000000 | |
54 | ||
55 | /* permanent static mappings from iotable_init() */ | |
56 | #define VM_ARM_STATIC_MAPPING 0x40000000 | |
57 | ||
58 | /* mapping type (attributes) for permanent static mappings */ | |
59 | #define VM_ARM_MTYPE(mt) ((mt) << 20) | |
60 | #define VM_ARM_MTYPE_MASK (0x1f << 20) | |
61 | ||
3ff1559e RK |
62 | #endif |
63 | ||
022ae537 | 64 | #ifdef CONFIG_ZONE_DMA |
4986e5c7 | 65 | extern phys_addr_t arm_dma_limit; |
022ae537 | 66 | #else |
09b2ad13 | 67 | #define arm_dma_limit ((phys_addr_t)~0) |
022ae537 RK |
68 | #endif |
69 | ||
c7909509 MS |
70 | extern phys_addr_t arm_lowmem_limit; |
71 | ||
8d717a52 | 72 | void __init bootmem_init(void); |
2778f620 | 73 | void arm_mm_memblock_reserve(void); |
c7909509 | 74 | void dma_contiguous_remap(void); |