diff --git a/src/northbridge/intel/haswell/Kconfig b/src/northbridge/intel/haswell/Kconfig
index a7f1f9b..f689780 100644
--- a/src/northbridge/intel/haswell/Kconfig
+++ b/src/northbridge/intel/haswell/Kconfig
@@ -59,15 +59,28 @@
 
 config DCACHE_RAM_BASE
 	hex
-	default 0xff7e0000
+	default 0xff7c0000
 
 config DCACHE_RAM_SIZE
 	hex
-	default 0x20000
+	default 0x10000
+	help
+	  The size of the cache-as-ram region required during bootblock
+	  and/or romstage. Note DCACHE_RAM_SIZE and DCACHE_RAM_MRC_VAR_SIZE
+	  must add up to a power of 2.
 
 config DCACHE_RAM_MRC_VAR_SIZE
 	hex
-	default 0x4000
+	default 0x30000
+	help
+	  The amount of cache-as-ram region required by the reference code.
+
+config DCACHE_RAM_ROMSTAGE_STACK_SIZE
+	hex
+	default 0x2000
+	help
+	  The amount of anticipated stack usage from the data cache
+	  during pre-ram rom stage execution.
 
 config HAVE_MRC
 	bool "Add a System Agent binary"