diff --git a/src/soc/amd/common/block/include/amdblocks/smn.h b/src/soc/amd/common/block/include/amdblocks/smn.h
index 962c8acd82..0268926bbe 100644
--- a/src/soc/amd/common/block/include/amdblocks/smn.h
+++ b/src/soc/amd/common/block/include/amdblocks/smn.h
@@ -6,6 +6,7 @@
 #include <types.h>
 
 uint32_t smn_read32(uint32_t reg);
+uint64_t smn_read64(uint32_t reg);
 void smn_write32(uint32_t reg, uint32_t val);
 
 #endif /* AMD_BLOCK_SMN_H */
diff --git a/src/soc/amd/common/block/smn/smn.c b/src/soc/amd/common/block/smn/smn.c
index 055f732cf7..caf6a41004 100644
--- a/src/soc/amd/common/block/smn/smn.c
+++ b/src/soc/amd/common/block/smn/smn.c
@@ -15,6 +15,11 @@ uint32_t smn_read32(uint32_t reg)
 	return pci_read_config32(SOC_GNB_DEV, SMN_DATA_ADDR);
 }
 
+uint64_t smn_read64(uint32_t reg)
+{
+	return smn_read32(reg) | (uint64_t)smn_read32(reg + 4) << 32;
+}
+
 void smn_write32(uint32_t reg, uint32_t val)
 {
 	pci_write_config32(SOC_GNB_DEV, SMN_INDEX_ADDR, reg);