+
+extern void purge_kernel_dcache_page(unsigned long);
+extern void clear_user_page_asm(void *page, unsigned long vaddr);
+
+void clear_user_page(void *page, unsigned long vaddr, struct page *pg)
+{
+ purge_kernel_dcache_page((unsigned long)page);
+ purge_tlb_start();
+ pdtlb_kernel(page);
+ purge_tlb_end();
+ clear_user_page_asm(page, vaddr);
+}
+EXPORT_SYMBOL(clear_user_page);
+
+void flush_kernel_dcache_page_addr(void *addr)
+{
+ flush_kernel_dcache_page_asm(addr);
+ purge_tlb_start();
+ pdtlb_kernel(addr);
+ purge_tlb_end();
+}
+EXPORT_SYMBOL(flush_kernel_dcache_page_addr);
+
+void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+ struct page *pg)
+{
+ /* no coherency needed (all in kmap/kunmap) */
+ copy_user_page_asm(vto, vfrom);
+ if (!parisc_requires_coherency())
+ flush_kernel_dcache_page_asm(vto);
+}
+EXPORT_SYMBOL(copy_user_page);
+
+#ifdef CONFIG_PA8X00
+
+void kunmap_parisc(void *addr)
+{
+ if (parisc_requires_coherency())
+ flush_kernel_dcache_page_addr(addr);
+}
+EXPORT_SYMBOL(kunmap_parisc);
+#endif
+
+void __flush_tlb_range(unsigned long sid, unsigned long start,
+ unsigned long end)
+{
+ unsigned long npages;
+
+ npages = ((end - (start & PAGE_MASK)) + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
+ if (npages >= 512) /* 2MB of space: arbitrary, should be tuned */
+ flush_tlb_all();
+ else {
+ mtsp(sid, 1);
+ purge_tlb_start();
+ if (split_tlb) {
+ while (npages--) {
+ pdtlb(start);
+ pitlb(start);
+ start += PAGE_SIZE;
+ }
+ } else {
+ while (npages--) {
+ pdtlb(start);
+ start += PAGE_SIZE;
+ }
+ }
+ purge_tlb_end();
+ }
+}
+
+static void cacheflush_h_tmp_function(void *dummy)
+{
+ flush_cache_all_local();
+}
+
+void flush_cache_all(void)
+{
+ on_each_cpu(cacheflush_h_tmp_function, NULL, 1, 1);
+}
+
+void flush_cache_mm(struct mm_struct *mm)
+{
+#ifdef CONFIG_SMP
+ flush_cache_all();
+#else
+ flush_cache_all_local();
+#endif
+}
+
+void
+flush_user_dcache_range(unsigned long start, unsigned long end)
+{
+ if ((end - start) < parisc_cache_flush_threshold)
+ flush_user_dcache_range_asm(start,end);
+ else
+ flush_data_cache();
+}
+
+void
+flush_user_icache_range(unsigned long start, unsigned long end)
+{
+ if ((end - start) < parisc_cache_flush_threshold)
+ flush_user_icache_range_asm(start,end);
+ else
+ flush_instruction_cache();
+}
+
+
+void flush_cache_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end)
+{
+ int sr3;
+
+ if (!vma->vm_mm->context) {
+ BUG();
+ return;
+ }
+
+ sr3 = mfsp(3);
+ if (vma->vm_mm->context == sr3) {
+ flush_user_dcache_range(start,end);
+ flush_user_icache_range(start,end);
+ } else {
+ flush_cache_all();
+ }
+}
+
+void
+flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn)
+{
+ BUG_ON(!vma->vm_mm->context);
+
+ if (likely(translation_exists(vma, vmaddr, pfn)))
+ __flush_cache_page(vma, vmaddr);
+
+}