PERFORCE change 55003 for review

[Juli Mallett]

http://perforce.freebsd.org/chv.cgi?CH=55003

Change 55003 by jmallett at jmallett_oingo on 2004/06/15 11:00:14

	Grow back a VCED handler.

Affected files ...

.. //depot/projects/mips/sys/mips/mips/exception.S#29 edit

Differences ...

==== //depot/projects/mips/sys/mips/mips/exception.S#29 (text+ko) ====

@@ -23,7 +23,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $P4: //depot/projects/mips/sys/mips/mips/exception.S#28 $
+ * $P4: //depot/projects/mips/sys/mips/mips/exception.S#29 $
  */
 
 #include "opt_ddb.h"
@@ -78,7 +78,7 @@
 	.dword	GenericException	/* Res (28) */
 	.dword	GenericException	/* Res (29) */
 	.dword	GenericException	/* Res (30) */
-	.dword	GenericException	/* VCED */
+	.dword	VCED			/* VCED */
 
 	.text
 	.set noreorder
@@ -224,6 +224,20 @@
 VEND(XTLBMissVector)
 
 /*
+ * Handle a data-cache virtual coherency error.
+ */
+LEAF(VCED)
+	.set noat
+	dmfc0	k0, MIPS_COP_0_BAD_VADDR
+	dsrl	k0, 4
+	dsll	k0, 4
+	cache	(CACHE_R4K_SD | CACHEOP_R4K_HIT_WB_INV), 0(k0)
+	cache	(CACHE_R4K_D | CACHEOP_R4K_HIT_INV), 0(k0)
+	eret
+	.set at
+END(VCED)
+
+/*
  * Restore registers from a trapframe pointed to in k1, returning to ra
  * that is passed in, and kept in k0.
  */