1 files changed, 20 insertions, 0 deletions
diff --git a/board/cr50/tpm_nvmem_ops.c b/board/cr50/tpm_nvmem_ops.c
index 23a8ead1cf..ed5d438204 100644
--- a/board/cr50/tpm_nvmem_ops.c
+++ b/board/cr50/tpm_nvmem_ops.c
@@ -4,6 +4,8 @@
  * found in the LICENSE file.
  */
 
+#include <stddef.h>
+
 #include "common.h"
 #include "console.h"
 #include "tpm_nvmem_ops.h"
@@ -95,3 +97,21 @@ enum tpm_write_rv write_tpm_nvmem_hidden(uint16_t object_index,
 
 	return ret;
 }
+
+size_t read_tpm_nvmem_size(uint16_t obj_index)
+{
+	TPM_HANDLE object_handle;
+	NV_INDEX nvIndex;
+	uint32_t handle_addr;
+
+	object_handle = HR_NV_INDEX | obj_index;
+
+	handle_addr = NvEarlyStageFindHandle(object_handle);
+	if (!handle_addr)
+		return 0;
+
+	/* Get properties of this index as stored in nvmem. */
+	NvReadIndexInfo(object_handle, handle_addr, &nvIndex);
+
+	return nvIndex.publicArea.dataSize;
+}