1 files changed, 14 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/memmap.c b/src/soc/intel/apollolake/memmap.c
index bf172cba6e..e57ed53d74 100644
--- a/src/soc/intel/apollolake/memmap.c
+++ b/src/soc/intel/apollolake/memmap.c
@@ -20,13 +20,27 @@
 #include <device/pci.h>
 #include <soc/northbridge.h>
 #include <soc/pci_devs.h>
+#include <soc/smm.h>
 
 static uintptr_t smm_region_start(void)
 {
 	return ALIGN_DOWN(pci_read_config32(NB_DEV_ROOT, TSEG), 1*MiB);
 }
 
+static size_t smm_region_size(void)
+{
+	uintptr_t smm_end =
+		ALIGN_DOWN(pci_read_config32(NB_DEV_ROOT, BGSM), 1*MiB);
+	return smm_end - smm_region_start();
+}
+
 void *cbmem_top(void)
 {
 	return (void *)smm_region_start();
 }
+
+void smm_region(void **start, size_t *size)
+{
+	*start = (void *)smm_region_start();
+	*size = smm_region_size();
+}