diff --git a/src/soc/intel/baytrail/baytrail/mrc_wrapper.h b/src/soc/intel/baytrail/baytrail/mrc_wrapper.h
index 2074100a2a..893debc34f 100644
--- a/src/soc/intel/baytrail/baytrail/mrc_wrapper.h
+++ b/src/soc/intel/baytrail/baytrail/mrc_wrapper.h
@@ -28,7 +28,7 @@
 #ifndef _MRC_WRAPPER_H_
 #define _MRC_WRAPPER_H_
 
-#define MRC_PARAMS_VER  2
+#define MRC_PARAMS_VER  3
 
 #define NUM_CHANNELS 2
 
@@ -79,6 +79,7 @@ struct mrc_params {
 
 	int txe_size_mb; /* TXE memory size in megabytes. */
 	int rmt_enabled; /* Enable RMT training + prints. */
+	int io_hole_mb;  /* Size of IO hole in MiB. */
 
 	/* Outputs */
 	void *txe_base_address;
diff --git a/src/soc/intel/baytrail/romstage/raminit.c b/src/soc/intel/baytrail/romstage/raminit.c
index 041853215d..573f370097 100644
--- a/src/soc/intel/baytrail/romstage/raminit.c
+++ b/src/soc/intel/baytrail/romstage/raminit.c
@@ -128,6 +128,11 @@ void raminit(struct mrc_params *mp, int prev_sleep_state)
 #if CONFIG_MRC_RMT
 	mp->rmt_enabled = 1;
 #endif
+
+	/* Default to 2GiB IO hole. */
+	if (!mp->io_hole_mb)
+		mp->io_hole_mb = 2048;
+
 	if (recovery_mode_enabled()) {
 		printk(BIOS_DEBUG, "Recovery mode: not using MRC cache.\n");
 	} else if (!mrc_cache_get_current(&cache)) {