This source file includes following definitions.
- kmap_high_get
1
2 #ifndef _ASM_HIGHMEM_H
3 #define _ASM_HIGHMEM_H
4
5 #include <asm/kmap_types.h>
6
7 #define PKMAP_BASE (PAGE_OFFSET - PMD_SIZE)
8 #define LAST_PKMAP PTRS_PER_PTE
9 #define LAST_PKMAP_MASK (LAST_PKMAP - 1)
10 #define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT)
11 #define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
12
13 #define kmap_prot PAGE_KERNEL
14
15 #define flush_cache_kmaps() \
16 do { \
17 if (cache_is_vivt()) \
18 flush_cache_all(); \
19 } while (0)
20
21 extern pte_t *pkmap_page_table;
22
23 extern void *kmap_high(struct page *page);
24 extern void kunmap_high(struct page *page);
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36
37 #define ARCH_NEEDS_KMAP_HIGH_GET
38 #if defined(CONFIG_SMP) && defined(CONFIG_CPU_TLB_V6)
39 #undef ARCH_NEEDS_KMAP_HIGH_GET
40 #if defined(CONFIG_HIGHMEM) && defined(CONFIG_CPU_CACHE_VIVT)
41 #error "The sum of features in your kernel config cannot be supported together"
42 #endif
43 #endif
44
45
46
47
48 #ifdef CONFIG_ARM_ERRATA_798181
49 #undef ARCH_NEEDS_KMAP_HIGH_GET
50 #endif
51
52 #ifdef ARCH_NEEDS_KMAP_HIGH_GET
53 extern void *kmap_high_get(struct page *page);
54 #else
55 static inline void *kmap_high_get(struct page *page)
56 {
57 return NULL;
58 }
59 #endif
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64
65 #ifdef CONFIG_HIGHMEM
66 extern void *kmap(struct page *page);
67 extern void kunmap(struct page *page);
68 extern void *kmap_atomic(struct page *page);
69 extern void __kunmap_atomic(void *kvaddr);
70 extern void *kmap_atomic_pfn(unsigned long pfn);
71 #endif
72
73 #endif