1 #ifndef _PARISC_CACHEFLUSH_H
2 #define _PARISC_CACHEFLUSH_H
5 #include <asm/cache.h> /* for flush_user_dcache_range_asm() proto */
7 /* The usual comment is "Caches aren't brain-dead on the <architecture>".
8 * Unfortunately, that doesn't apply to PA-RISC. */
10 /* Cache flush operations */
13 #define flush_cache_mm(mm) flush_cache_all()
15 #define flush_cache_mm(mm) flush_cache_all_local()
18 #define flush_cache_dup_mm(mm) flush_cache_mm(mm)
20 #define flush_kernel_dcache_range(start,size) \
21 flush_kernel_dcache_range_asm((start), (start)+(size));
23 extern void flush_cache_all_local(void);
25 static inline void cacheflush_h_tmp_function(void *dummy)
27 flush_cache_all_local();
30 static inline void flush_cache_all(void)
32 on_each_cpu(cacheflush_h_tmp_function, NULL, 1, 1);
35 #define flush_cache_vmap(start, end) flush_cache_all()
36 #define flush_cache_vunmap(start, end) flush_cache_all()
38 extern int parisc_cache_flush_threshold;
39 void parisc_setup_cache_timing(void);
42 flush_user_dcache_range(unsigned long start, unsigned long end)
44 if ((end - start) < parisc_cache_flush_threshold)
45 flush_user_dcache_range_asm(start,end);
51 flush_user_icache_range(unsigned long start, unsigned long end)
53 if ((end - start) < parisc_cache_flush_threshold)
54 flush_user_icache_range_asm(start,end);
56 flush_instruction_cache();
59 extern void flush_dcache_page(struct page *page);
61 #define flush_dcache_mmap_lock(mapping) \
62 write_lock_irq(&(mapping)->tree_lock)
63 #define flush_dcache_mmap_unlock(mapping) \
64 write_unlock_irq(&(mapping)->tree_lock)
66 #define flush_icache_page(vma,page) do { flush_kernel_dcache_page(page); flush_kernel_icache_page(page_address(page)); } while (0)
68 #define flush_icache_range(s,e) do { flush_kernel_dcache_range_asm(s,e); flush_kernel_icache_range_asm(s,e); } while (0)
70 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
72 flush_cache_page(vma, vaddr, page_to_pfn(page)); \
73 memcpy(dst, src, len); \
74 flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
77 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
79 flush_cache_page(vma, vaddr, page_to_pfn(page)); \
80 memcpy(dst, src, len); \
83 static inline void flush_cache_range(struct vm_area_struct *vma,
84 unsigned long start, unsigned long end)
88 if (!vma->vm_mm->context) {
94 if (vma->vm_mm->context == sr3) {
95 flush_user_dcache_range(start,end);
96 flush_user_icache_range(start,end);
102 /* Simple function to work out if we have an existing address translation
103 * for a user space vma. */
104 static inline int translation_exists(struct vm_area_struct *vma,
105 unsigned long addr, unsigned long pfn)
107 pgd_t *pgd = pgd_offset(vma->vm_mm, addr);
114 pmd = pmd_offset(pgd, addr);
115 if(pmd_none(*pmd) || pmd_bad(*pmd))
118 /* We cannot take the pte lock here: flush_cache_page is usually
119 * called with pte lock already held. Whereas flush_dcache_page
120 * takes flush_dcache_mmap_lock, which is lower in the hierarchy:
121 * the vma itself is secure, but the pte might come or go racily.
123 pte = *pte_offset_map(pmd, addr);
124 /* But pte_unmap() does nothing on this architecture */
126 /* Filter out coincidental file entries and swap entries */
127 if (!(pte_val(pte) & (_PAGE_FLUSH|_PAGE_PRESENT)))
130 return pte_pfn(pte) == pfn;
133 /* Private function to flush a page from the cache of a non-current
134 * process. cr25 contains the Page Directory of the current user
135 * process; we're going to hijack both it and the user space %sr3 to
136 * temporarily make the non-current process current. We have to do
137 * this because cache flushing may cause a non-access tlb miss which
138 * the handlers have to fill in from the pgd of the non-current
141 flush_user_cache_page_non_current(struct vm_area_struct *vma,
142 unsigned long vmaddr)
144 /* save the current process space and pgd */
145 unsigned long space = mfsp(3), pgd = mfctl(25);
147 /* we don't mind taking interrups since they may not
148 * do anything with user space, but we can't
149 * be preempted here */
152 /* make us current */
153 mtctl(__pa(vma->vm_mm->pgd), 25);
154 mtsp(vma->vm_mm->context, 3);
156 flush_user_dcache_page(vmaddr);
157 if(vma->vm_flags & VM_EXEC)
158 flush_user_icache_page(vmaddr);
160 /* put the old current process back */
167 __flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr)
169 if (likely(vma->vm_mm->context == mfsp(3))) {
170 flush_user_dcache_page(vmaddr);
171 if (vma->vm_flags & VM_EXEC)
172 flush_user_icache_page(vmaddr);
174 flush_user_cache_page_non_current(vma, vmaddr);
179 flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn)
181 BUG_ON(!vma->vm_mm->context);
183 if (likely(translation_exists(vma, vmaddr, pfn)))
184 __flush_cache_page(vma, vmaddr);
189 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
192 flush_user_dcache_page(vmaddr);
194 #define ARCH_HAS_FLUSH_ANON_PAGE
196 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
197 void flush_kernel_dcache_page_addr(void *addr);
198 static inline void flush_kernel_dcache_page(struct page *page)
200 flush_kernel_dcache_page_addr(page_address(page));
203 #ifdef CONFIG_DEBUG_RODATA
204 void mark_rodata_ro(void);
208 /* Only pa8800, pa8900 needs this */
209 #define ARCH_HAS_KMAP
211 void kunmap_parisc(void *addr);
213 static inline void *kmap(struct page *page)
216 return page_address(page);
219 #define kunmap(page) kunmap_parisc(page_address(page))
221 #define kmap_atomic(page, idx) page_address(page)
223 #define kunmap_atomic(addr, idx) kunmap_parisc(addr)
225 #define kmap_atomic_pfn(pfn, idx) page_address(pfn_to_page(pfn))
226 #define kmap_atomic_to_page(ptr) virt_to_page(ptr)
229 #endif /* _PARISC_CACHEFLUSH_H */