1 files changed, 95 insertions, 0 deletions

diff --git a/include/asm-parisc/tlbflush.h b/include/asm-parisc/tlbflush.h
new file mode 100644
index 000000000000..eb27b78930e8
--- /dev/null
+++ b/include/asm-parisc/tlbflush.h
@@ -0,0 +1,95 @@
+#ifndef _PARISC_TLBFLUSH_H
+#define _PARISC_TLBFLUSH_H
+
+/* TLB flushing routines.... */
+
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <asm/mmu_context.h>
+
+extern void flush_tlb_all(void);
+
+/*
+ * flush_tlb_mm()
+ *
+ * XXX This code is NOT valid for HP-UX compatibility processes,
+ * (although it will probably work 99% of the time). HP-UX
+ * processes are free to play with the space id's and save them
+ * over long periods of time, etc. so we have to preserve the
+ * space and just flush the entire tlb. We need to check the
+ * personality in order to do that, but the personality is not
+ * currently being set correctly.
+ *
+ * Of course, Linux processes could do the same thing, but
+ * we don't support that (and the compilers, dynamic linker,
+ * etc. do not do that).
+ */
+
+static inline void flush_tlb_mm(struct mm_struct *mm)
+{
+        BUG_ON(mm == &init_mm); /* Should never happen */
+
+#ifdef CONFIG_SMP
+        flush_tlb_all();
+#else
+        if (mm) {
+                if (mm->context != 0)
+                        free_sid(mm->context);
+                mm->context = alloc_sid();
+                if (mm == current->active_mm)
+                        load_context(mm->context);
+        }
+#endif
+}
+
+extern __inline__ void flush_tlb_pgtables(struct mm_struct *mm, unsigned long start, unsigned long end)
+{
+}
+ 
+static inline void flush_tlb_page(struct vm_area_struct *vma,
+        unsigned long addr)
+{
+        /* For one page, it's not worth testing the split_tlb variable */
+
+        mb();
+        mtsp(vma->vm_mm->context,1);
+        purge_tlb_start();
+        pdtlb(addr);
+        pitlb(addr);
+        purge_tlb_end();
+}
+
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+        unsigned long start, unsigned long end)
+{
+        unsigned long npages;
+
+        
+        npages = ((end - (start & PAGE_MASK)) + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
+        if (npages >= 512)  /* XXX arbitrary, should be tuned */
+                flush_tlb_all();
+        else {
+
+                mtsp(vma->vm_mm->context,1);
+                if (split_tlb) {
+                        purge_tlb_start();
+                        while (npages--) {
+                                pdtlb(start);
+                                pitlb(start);
+                                start += PAGE_SIZE;
+                        }
+                        purge_tlb_end();
+                } else {
+                        purge_tlb_start();
+                        while (npages--) {
+                                pdtlb(start);
+                                start += PAGE_SIZE;
+                        }
+                        purge_tlb_end();
+                }
+        }
+}
+
+#define flush_tlb_kernel_range(start, end) flush_tlb_all()
+
+#endif