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parisc: Call pagefault_disable/pagefault_enable in kmap_atomic/kunmap_atomic
[~shefty/rdma-dev.git] / arch / parisc / include / asm / cacheflush.h
1 #ifndef _PARISC_CACHEFLUSH_H
2 #define _PARISC_CACHEFLUSH_H
3
4 #include <linux/mm.h>
5 #include <linux/uaccess.h>
6
7 /* The usual comment is "Caches aren't brain-dead on the <architecture>".
8  * Unfortunately, that doesn't apply to PA-RISC. */
9
10 /* Internal implementation */
11 void flush_data_cache_local(void *);  /* flushes local data-cache only */
12 void flush_instruction_cache_local(void *); /* flushes local code-cache only */
13 #ifdef CONFIG_SMP
14 void flush_data_cache(void); /* flushes data-cache only (all processors) */
15 void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
16 #else
17 #define flush_data_cache() flush_data_cache_local(NULL)
18 #define flush_instruction_cache() flush_instruction_cache_local(NULL)
19 #endif
20
21 #define flush_cache_dup_mm(mm) flush_cache_mm(mm)
22
23 void flush_user_icache_range_asm(unsigned long, unsigned long);
24 void flush_kernel_icache_range_asm(unsigned long, unsigned long);
25 void flush_user_dcache_range_asm(unsigned long, unsigned long);
26 void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
27 void flush_kernel_dcache_page_asm(void *);
28 void flush_kernel_icache_page(void *);
29 void flush_user_dcache_page(unsigned long);
30 void flush_user_icache_page(unsigned long);
31 void flush_user_dcache_range(unsigned long, unsigned long);
32 void flush_user_icache_range(unsigned long, unsigned long);
33
34 /* Cache flush operations */
35
36 void flush_cache_all_local(void);
37 void flush_cache_all(void);
38 void flush_cache_mm(struct mm_struct *mm);
39
40 #define flush_kernel_dcache_range(start,size) \
41         flush_kernel_dcache_range_asm((start), (start)+(size));
42 /* vmap range flushes and invalidates.  Architecturally, we don't need
43  * the invalidate, because the CPU should refuse to speculate once an
44  * area has been flushed, so invalidate is left empty */
45 static inline void flush_kernel_vmap_range(void *vaddr, int size)
46 {
47         unsigned long start = (unsigned long)vaddr;
48
49         flush_kernel_dcache_range_asm(start, start + size);
50 }
51 static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
52 {
53 }
54
55 #define flush_cache_vmap(start, end)            flush_cache_all()
56 #define flush_cache_vunmap(start, end)          flush_cache_all()
57
58 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
59 extern void flush_dcache_page(struct page *page);
60
61 #define flush_dcache_mmap_lock(mapping) \
62         spin_lock_irq(&(mapping)->tree_lock)
63 #define flush_dcache_mmap_unlock(mapping) \
64         spin_unlock_irq(&(mapping)->tree_lock)
65
66 #define flush_icache_page(vma,page)     do {            \
67         flush_kernel_dcache_page(page);                 \
68         flush_kernel_icache_page(page_address(page));   \
69 } while (0)
70
71 #define flush_icache_range(s,e)         do {            \
72         flush_kernel_dcache_range_asm(s,e);             \
73         flush_kernel_icache_range_asm(s,e);             \
74 } while (0)
75
76 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
77 do { \
78         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
79         memcpy(dst, src, len); \
80         flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
81 } while (0)
82
83 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
84 do { \
85         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
86         memcpy(dst, src, len); \
87 } while (0)
88
89 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
90 void flush_cache_range(struct vm_area_struct *vma,
91                 unsigned long start, unsigned long end);
92
93 #define ARCH_HAS_FLUSH_ANON_PAGE
94 static inline void
95 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
96 {
97         if (PageAnon(page))
98                 flush_user_dcache_page(vmaddr);
99 }
100
101 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
102 void flush_kernel_dcache_page_addr(void *addr);
103 static inline void flush_kernel_dcache_page(struct page *page)
104 {
105         flush_kernel_dcache_page_addr(page_address(page));
106 }
107
108 #ifdef CONFIG_DEBUG_RODATA
109 void mark_rodata_ro(void);
110 #endif
111
112 #ifdef CONFIG_PA8X00
113 /* Only pa8800, pa8900 needs this */
114
115 #include <asm/kmap_types.h>
116
117 #define ARCH_HAS_KMAP
118
119 void kunmap_parisc(void *addr);
120
121 static inline void *kmap(struct page *page)
122 {
123         might_sleep();
124         return page_address(page);
125 }
126
127 #define kunmap(page)                    kunmap_parisc(page_address(page))
128
129 static inline void *kmap_atomic(struct page *page, enum km_type idx)
130 {
131         pagefault_disable();
132         return page_address(page);
133 }
134
135 static inline void kunmap_atomic(void *addr, enum km_type idx)
136 {
137         kunmap_parisc(addr);
138         pagefault_enable();
139 }
140
141 #define kmap_atomic_prot(page, idx, prot)       kmap_atomic(page, idx)
142 #define kmap_atomic_pfn(pfn, idx)       kmap_atomic(pfn_to_page(pfn), (idx))
143 #define kmap_atomic_to_page(ptr)        virt_to_page(ptr)
144 #endif
145
146 #endif /* _PARISC_CACHEFLUSH_H */
147