diff --git a/src/drivers/intel/fsp/fsp_util.c b/src/drivers/intel/fsp/fsp_util.c
index 0844b37bb7..2a53c25332 100644
--- a/src/drivers/intel/fsp/fsp_util.c
+++ b/src/drivers/intel/fsp/fsp_util.c
@@ -195,6 +195,26 @@ void * find_saved_temp_mem(void *hob_list_ptr)
 	return (void *) ((char *) saved_mem_hob + sizeof(EFI_HOB_GUID_TYPE));
 }
 
+#ifndef FSP_RESERVE_MEMORY_SIZE
+/** @brief locates the HOB containing the location of the fsp reserved mem area
+ *
+ * @param hob_list_ptr pointer to the start of the hob list
+ * @return pointer to the start of the FSP reserved memory or NULL if not found.
+ */
+void * find_fsp_reserved_mem(void *hob_list_ptr)
+{
+	EFI_GUID fsp_reserved_guid = FSP_HOB_RESOURCE_OWNER_FSP_GUID;
+	EFI_HOB_RESOURCE_DESCRIPTOR *fsp_reserved_mem =
+			(EFI_HOB_RESOURCE_DESCRIPTOR *) find_hob_by_guid(
+			hob_list_ptr, &fsp_reserved_guid);
+
+	if (fsp_reserved_mem == NULL)
+		return NULL;
+
+	return  (void *)((uintptr_t)fsp_reserved_mem->PhysicalStart);
+}
+#endif /* FSP_RESERVE_MEMORY_SIZE */
+
 #ifndef __PRE_RAM__ /* Only parse HOB data in ramstage */
 
 void print_fsp_info(void) {
diff --git a/src/drivers/intel/fsp/fsp_util.h b/src/drivers/intel/fsp/fsp_util.h
index a39f5a2700..d65b842c56 100644
--- a/src/drivers/intel/fsp/fsp_util.h
+++ b/src/drivers/intel/fsp/fsp_util.h
@@ -38,6 +38,7 @@ void chipset_fsp_early_init(FSP_INIT_PARAMS *FspInitParams,
 	FSP_INFO_HEADER *fsp_ptr);
 void ChipsetFspReturnPoint(EFI_STATUS Status, VOID *HobListPtr);
 void * find_saved_temp_mem(void *hob_list_ptr);
+void * find_fsp_reserved_mem(void *hob_list_ptr);
 
 /* functions in hob.c */
 void print_hob_mem_attributes(void *Hobptr);
diff --git a/src/soc/intel/fsp_baytrail/fsp/chipset_fsp_util.h b/src/soc/intel/fsp_baytrail/fsp/chipset_fsp_util.h
index 1f4fa743b4..29309bf0a5 100644
--- a/src/soc/intel/fsp_baytrail/fsp/chipset_fsp_util.h
+++ b/src/soc/intel/fsp_baytrail/fsp/chipset_fsp_util.h
@@ -32,8 +32,6 @@
 #include <fspvpd.h>
 #include <azalia.h>
 
-#define FSP_RESERVE_MEMORY_SIZE	0x200000
-
 #define FSP_INFO_HEADER_GUID \
   { \
   0x912740BE, 0x2284, 0x4734, {0xB9, 0x71, 0x84, 0xB0, 0x27, 0x35, 0x3F, 0x0C} \
diff --git a/src/soc/intel/fsp_baytrail/memmap.c b/src/soc/intel/fsp_baytrail/memmap.c
index 615916b96d..8a10ac80c7 100644
--- a/src/soc/intel/fsp_baytrail/memmap.c
+++ b/src/soc/intel/fsp_baytrail/memmap.c
@@ -29,18 +29,17 @@ uintptr_t smm_region_start(void)
 	return (iosf_bunit_read(BUNIT_SMRRL) << 20);
 }
 
-/*
- * Calculate the top of usable (low) DRAM.
- * The FSP's reserved memory sits just below the SMM region,
- * allowing calculation of the top of usable memory.
+/** @brief get the top of usable low memory from the FSP's HOB list
+ *
+ * The FSP's reserved memory sits just below the SMM region.  The memory
+ * region below it is usable memory.
  *
  * The entire memory map is shown in northcluster.c
+ *
+ * @return pointer to the first byte of reserved memory
  */
 
 void *cbmem_top(void)
 {
-	uintptr_t tom = smm_region_start();
-	if (!tom)
-		tom = iosf_bunit_read(BUNIT_BMBOUND);
-	return (void *) tom - FSP_RESERVE_MEMORY_SIZE;
+	return find_fsp_reserved_mem(*(void **)CBMEM_FSP_HOB_PTR);
 }
diff --git a/src/soc/intel/fsp_baytrail/northcluster.c b/src/soc/intel/fsp_baytrail/northcluster.c
index 838e5547aa..b288388db2 100644
--- a/src/soc/intel/fsp_baytrail/northcluster.c
+++ b/src/soc/intel/fsp_baytrail/northcluster.c
@@ -149,8 +149,7 @@ static void mc_add_dram_resources(device_t dev)
 	uint32_t fsp_mem_base = 0;
 
 	GetHighMemorySize(&highmem_size);
-	GetLowMemorySize(&fsp_mem_base);
-
+	fsp_mem_base=(uint32_t)cbmem_top();
 
 	bmbound = iosf_bunit_read(BUNIT_BMBOUND);
 	bsmmrrl = iosf_bunit_read(BUNIT_SMRRL) << 20;
@@ -162,10 +161,6 @@ static void mc_add_dram_resources(device_t dev)
 
 		printk(BIOS_DEBUG, "FSP memory location: 0x%x\nFSP memory size: %dM\n",
 				fsp_mem_base, (bsmmrrl - fsp_mem_base) >> 20);
-
-		if ((bsmmrrl - fsp_mem_base ) != FSP_RESERVE_MEMORY_SIZE)
-			printk(BIOS_WARNING, "Warning: Fsp memory size does not match "
-					"expected memory size (%x).\n", FSP_RESERVE_MEMORY_SIZE);
 	}
 
 	printk(BIOS_INFO, "Available memory below 4GB: 0x%08x (%dM)\n",