diff --git a/src/soc/intel/apollolake/systemagent.c b/src/soc/intel/apollolake/systemagent.c
index b61f5fa..4db4d49 100644
--- a/src/soc/intel/apollolake/systemagent.c
+++ b/src/soc/intel/apollolake/systemagent.c
@@ -32,15 +32,11 @@
 		return;
 
 	if (MCHBAR32(GFXVTBAR) & VTBAR_ENABLED) {
-		mmio_resource_kb(dev, *index,
-			      (MCHBAR64(GFXVTBAR) & VTBAR_MASK) / KiB,
-			      VTBAR_SIZE / KiB);
+		mmio_range(dev, *index, MCHBAR64(GFXVTBAR) & VTBAR_MASK, VTBAR_SIZE);
 		(*index)++;
 	}
 	if (MCHBAR32(DEFVTBAR) & VTBAR_ENABLED) {
-		mmio_resource_kb(dev, *index,
-			      (MCHBAR64(DEFVTBAR) & VTBAR_MASK) / KiB,
-			      VTBAR_SIZE / KiB);
+		mmio_range(dev, *index, MCHBAR64(DEFVTBAR) & VTBAR_MASK, VTBAR_SIZE);
 		(*index)++;
 	}
 }