2010-12-22 Sebastian Huber <sebastian.huber@embedded-brains.de>

* new-exceptions/bspsupport/ppc_exc.S: Comment.
	* new-exceptions/bspsupport/ppc_exc_address.c: Fixed address
	calculation for e200z1 core.

c/src/lib/libcpu/powerpc/ChangeLog

@@ -1,3 +1,9 @@
+2010-12-22	Sebastian Huber <sebastian.huber@embedded-brains.de>
+
+	* new-exceptions/bspsupport/ppc_exc.S: Comment.
+	* new-exceptions/bspsupport/ppc_exc_address.c: Fixed address
+	calculation for e200z1 core.
+
 2010-11-30	Joel Sherrill <joel.sherrilL@OARcorp.com>
 
 	* mpc55xx/edma/edma.c: Use rtems_chain_first() and do not directly

c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/ppc_exc.S

@@ -74,6 +74,12 @@ ppc_exc_tgpr_clr_prolog_size = . - ppc_exc_tgpr_clr_prolog
 /**
  * @brief Use vector offsets with 16 byte boundaries.
  *
+ * This prologue is intended for cores with IVPR/IVOR registers.  The e200z1
+ * core has hard wired values for the IVOR, thus all values are calculated to
+ * match its constraints.  The link register will point to the next prologue.
+ * This is all right for the vector number calculation due the IVOR offset
+ * values.
+ *
  * @see ppc_exc_min_prolog_auto();
  */
 	.global ppc_exc_min_prolog_auto_packed

c/src/lib/libcpu/powerpc/new-exceptions/bspsupport/ppc_exc_address.c

@@ -70,7 +70,7 @@ void *ppc_exc_vector_address(unsigned vector)
      * XXX: this directly matches the vector offsets in a e200z1, 
      * which has hardwired IVORs (IVOR0=0,IVOR1=0x10,IVOR2=0x20...) 
      */
-    vector_offset >>= 4;
+    vector_offset = (vector - 1) << 4;
   }
 
   if (bsp_exceptions_in_RAM) {