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cacheflush.h
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1 #ifndef _PARISC_CACHEFLUSH_H
2 #define _PARISC_CACHEFLUSH_H
3 
4 #include <linux/mm.h>
5 #include <linux/uaccess.h>
6 #include <asm/tlbflush.h>
7 
8 /* The usual comment is "Caches aren't brain-dead on the <architecture>".
9  * Unfortunately, that doesn't apply to PA-RISC. */
10 
11 /* Internal implementation */
12 void flush_data_cache_local(void *); /* flushes local data-cache only */
13 void flush_instruction_cache_local(void *); /* flushes local code-cache only */
14 #ifdef CONFIG_SMP
15 void flush_data_cache(void); /* flushes data-cache only (all processors) */
16 void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
17 #else
18 #define flush_data_cache() flush_data_cache_local(NULL)
19 #define flush_instruction_cache() flush_instruction_cache_local(NULL)
20 #endif
21 
22 #define flush_cache_dup_mm(mm) flush_cache_mm(mm)
23 
24 void flush_user_icache_range_asm(unsigned long, unsigned long);
25 void flush_kernel_icache_range_asm(unsigned long, unsigned long);
26 void flush_user_dcache_range_asm(unsigned long, unsigned long);
27 void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
28 void flush_kernel_dcache_page_asm(void *);
29 void flush_kernel_icache_page(void *);
30 void flush_user_dcache_range(unsigned long, unsigned long);
31 void flush_user_icache_range(unsigned long, unsigned long);
32 
33 /* Cache flush operations */
34 
35 void flush_cache_all_local(void);
36 void flush_cache_all(void);
37 void flush_cache_mm(struct mm_struct *mm);
38 
39 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
41 static inline void flush_kernel_dcache_page(struct page *page)
42 {
44 }
45 
46 #define flush_kernel_dcache_range(start,size) \
47  flush_kernel_dcache_range_asm((start), (start)+(size));
48 /* vmap range flushes and invalidates. Architecturally, we don't need
49  * the invalidate, because the CPU should refuse to speculate once an
50  * area has been flushed, so invalidate is left empty */
51 static inline void flush_kernel_vmap_range(void *vaddr, int size)
52 {
53  unsigned long start = (unsigned long)vaddr;
54 
55  flush_kernel_dcache_range_asm(start, start + size);
56 }
57 static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
58 {
59  unsigned long start = (unsigned long)vaddr;
60  void *cursor = vaddr;
61 
62  for ( ; cursor < vaddr + size; cursor += PAGE_SIZE) {
63  struct page *page = vmalloc_to_page(cursor);
64 
66  flush_kernel_dcache_page(page);
67  }
68  flush_kernel_dcache_range_asm(start, start + size);
69 }
70 
71 #define flush_cache_vmap(start, end) flush_cache_all()
72 #define flush_cache_vunmap(start, end) flush_cache_all()
73 
74 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
75 extern void flush_dcache_page(struct page *page);
76 
77 #define flush_dcache_mmap_lock(mapping) \
78  spin_lock_irq(&(mapping)->tree_lock)
79 #define flush_dcache_mmap_unlock(mapping) \
80  spin_unlock_irq(&(mapping)->tree_lock)
81 
82 #define flush_icache_page(vma,page) do { \
83  flush_kernel_dcache_page(page); \
84  flush_kernel_icache_page(page_address(page)); \
85 } while (0)
86 
87 #define flush_icache_range(s,e) do { \
88  flush_kernel_dcache_range_asm(s,e); \
89  flush_kernel_icache_range_asm(s,e); \
90 } while (0)
91 
92 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
93 do { \
94  flush_cache_page(vma, vaddr, page_to_pfn(page)); \
95  memcpy(dst, src, len); \
96  flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
97 } while (0)
98 
99 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
100 do { \
101  flush_cache_page(vma, vaddr, page_to_pfn(page)); \
102  memcpy(dst, src, len); \
103 } while (0)
104 
105 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
106 void flush_cache_range(struct vm_area_struct *vma,
107  unsigned long start, unsigned long end);
108 
109 /* defined in pacache.S exported in cache.c used by flush_anon_page */
110 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
111 
112 #define ARCH_HAS_FLUSH_ANON_PAGE
113 static inline void
114 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
115 {
116  if (PageAnon(page)) {
117  flush_tlb_page(vma, vmaddr);
118  flush_dcache_page_asm(page_to_phys(page), vmaddr);
119  }
120 }
121 
122 #ifdef CONFIG_DEBUG_RODATA
123 void mark_rodata_ro(void);
124 #endif
125 
126 #ifdef CONFIG_PA8X00
127 /* Only pa8800, pa8900 needs this */
128 
129 #include <asm/kmap_types.h>
130 
131 #define ARCH_HAS_KMAP
132 
133 void kunmap_parisc(void *addr);
134 
135 static inline void *kmap(struct page *page)
136 {
137  might_sleep();
138  return page_address(page);
139 }
140 
141 #define kunmap(page) kunmap_parisc(page_address(page))
142 
143 static inline void *kmap_atomic(struct page *page)
144 {
145  pagefault_disable();
146  return page_address(page);
147 }
148 
149 static inline void __kunmap_atomic(void *addr)
150 {
151  kunmap_parisc(addr);
152  pagefault_enable();
153 }
154 
155 #define kmap_atomic_prot(page, prot) kmap_atomic(page)
156 #define kmap_atomic_pfn(pfn) kmap_atomic(pfn_to_page(pfn))
157 #define kmap_atomic_to_page(ptr) virt_to_page(ptr)
158 #endif
159 
160 #endif /* _PARISC_CACHEFLUSH_H */
161