diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 81fcfe0..7693699 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -28,6 +28,9 @@
 	SBI_EXT_HSM = 0x48534D,
 	SBI_EXT_SRST = 0x53525354,
 	SBI_EXT_PMU = 0x504D55,
+	SBI_EXT_DBCN = 0x4442434E,
+	SBI_EXT_SUSP = 0x53555350,
+	SBI_EXT_CPPC = 0x43505043,
 };
 
 enum sbi_ext_base_fid {
@@ -89,6 +92,12 @@
 	SBI_SRST_RESET_REASON_SYS_FAILURE,
 };
 
+enum sbi_ext_dbcn_fid {
+	SBI_EXT_DBCN_CONSOLE_WRITE = 0,
+	SBI_EXT_DBCN_CONSOLE_READ,
+	SBI_EXT_DBCN_CONSOLE_WRITE_BYTE,
+};
+
 #ifdef CONFIG_SBI_V01
 #define SBI_EXT_SET_TIMER		SBI_EXT_0_1_SET_TIMER
 #define SBI_FID_SET_TIMER		0