1 files changed, 94 insertions, 0 deletions
diff --git a/arch/sparc/mm/vac-flush.c b/arch/sparc/mm/vac-flush.c
new file mode 100644
index 000000000..796366b53
--- /dev/null
+++ b/arch/sparc/mm/vac-flush.c
@@ -0,0 +1,94 @@
+/* vac.c:   Routines for flushing various amount of the Sparc VAC
+            (virtual address cache).
+
+   Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
+*/
+
+#include <asm/vac-ops.h>
+#include <asm/page.h>
+
+/* Flush all VAC entries for the current context */
+
+extern int vac_do_hw_vac_flushes, vac_size, vac_linesize;
+extern int vac_entries_per_context, vac_entries_per_segment;
+extern int vac_entries_per_page;
+
+void
+flush_vac_context()
+{
+  register int entries_left, offset;
+  register char* address;
+
+  entries_left = vac_entries_per_context;
+  address = (char *) 0;
+
+  if(vac_do_hw_vac_flushes)
+    {
+      while(entries_left-- >=0)
+	{
+	  hw_flush_vac_context_entry(address);
+	  address += PAGE_SIZE;
+	}
+    }
+  else
+    {
+      offset = vac_linesize;
+      while(entries_left-- >=0)
+	{
+	  sw_flush_vac_context_entry(address);
+	  address += offset;
+	}
+    }
+}
+
+void
+flush_vac_segment(register unsigned int segment)
+{
+  register int entries_left, offset;
+  register char* address = (char *) 0;
+  
+  entries_left = vac_entries_per_segment;
+  __asm__ __volatile__("sll %0, 18, %1\n\t"
+		       "sra %1, 0x2, %1\n\t"
+		       : "=r" (segment) : "0" (address));
+
+  if(vac_do_hw_vac_flushes)
+    {
+      while(entries_left-- >=0)
+	{
+	  hw_flush_vac_segment_entry(address);
+	  address += PAGE_SIZE;
+	}
+    }
+  else
+    {
+      offset = vac_linesize;
+      while(entries_left-- >=0)
+	{
+	  sw_flush_vac_segment_entry(address);
+	  address += offset;
+	}
+    }
+}
+
+void
+flush_vac_page(register unsigned int addr)
+{
+  register int entries_left, offset;
+
+  if(vac_do_hw_vac_flushes)
+    {
+      hw_flush_vac_page_entry((unsigned long *) addr);
+    }
+  else
+    {
+      entries_left = vac_entries_per_page;
+      offset = vac_linesize;
+      while(entries_left-- >=0)
+	{
+	  sw_flush_vac_page_entry((unsigned long *) addr);
+	  addr += offset;
+	}
+    }
+}
+