diff --git a/include/mmu.h b/include/mmu.h
index dc6159f..fa9b4c8 100644
--- a/include/mmu.h
+++ b/include/mmu.h
@@ -24,15 +24,7 @@
 #ifndef _MMU_H_
 #define _MMU_H_
 
-#define STD_MMUTR	(MCF_MMU_MMUTR_SG | MCF_MMU_MMUTR_V)
-#define MMUORD_D	(MCF_MMU_MMUOR_ACC | MCF_MMU_MMUOR_UAA)
-#define MMUORD_I	(MCF_MMU_MMUOR_ITLB | MCF_MMU_MMUOR_ACC | MCF_MMU_MMUOR_UAA)
-
-#define WRITETHROUGH_MMUDR		(MCF_MMU_MMUDR_SZ(00) | MCF_MMU_MMUDR_CM(00) | MCF_MMU_MMUDR_R | MCF_MMU_MMUDR_W | MCF_MMU_MMUDR_X)
-#define COPYBACK_MMUDR			(MCF_MMU_MMUDR_SZ(00) | MCF_MMU_MMUDR_CM(01) | MCF_MMU_MMUDR_R | MCF_MMU_MMUDR_W | MCF_MMU_MMUDR_X)
-#define NOCACHE_PRECISE_MMUDR	(MCF_MMU_MMUDR_SZ(00) | MCF_MMU_MMUDR_CM(10) | MCF_MMU_MMUDR_R | MCF_MMU_MMUDR_W | MCF_MMU_MMUDR_X)
-
-#define SCA_PAGE_ID		6
+#define SCA_PAGE_ID		6	/* indicates video memory page */
 
 /*
  * global variables from linker script