diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index c7a6427ea9..f9cea3d674 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -857,6 +857,22 @@ enum {
 /* number of possible TLBs */
 #define BOOKE206_MAX_TLBN      4
 
+/*****************************************************************************/
+/* Embedded.Processor Control */
+
+#define DBELL_TYPE_SHIFT               27
+#define DBELL_TYPE_MASK                (0x1f << DBELL_TYPE_SHIFT)
+#define DBELL_TYPE_DBELL               (0x00 << DBELL_TYPE_SHIFT)
+#define DBELL_TYPE_DBELL_CRIT          (0x01 << DBELL_TYPE_SHIFT)
+#define DBELL_TYPE_G_DBELL             (0x02 << DBELL_TYPE_SHIFT)
+#define DBELL_TYPE_G_DBELL_CRIT        (0x03 << DBELL_TYPE_SHIFT)
+#define DBELL_TYPE_G_DBELL_MC          (0x04 << DBELL_TYPE_SHIFT)
+
+#define DBELL_BRDCAST                  (1 << 26)
+#define DBELL_LPIDTAG_SHIFT            14
+#define DBELL_LPIDTAG_MASK             (0xfff << DBELL_LPIDTAG_SHIFT)
+#define DBELL_PIRTAG_MASK              0x3fff
+
 /*****************************************************************************/
 /* The whole PowerPC CPU context */
 #define NB_MMU_MODES 3