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-rw-r--r--src/northbridge/intel/haswell/registers/mchbar.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/northbridge/intel/haswell/registers/mchbar.h b/src/northbridge/intel/haswell/registers/mchbar.h
index 4bdb49a370..a61036aca3 100644
--- a/src/northbridge/intel/haswell/registers/mchbar.h
+++ b/src/northbridge/intel/haswell/registers/mchbar.h
@@ -46,6 +46,9 @@
#define MAILBOX_BIOS_CMD_FSM_MEASURE_INTVL 0x909
#define MAILBOX_BIOS_CMD_READ_PCH_POWER 0xa
#define MAILBOX_BIOS_CMD_READ_PCH_POWER_EXT 0xb
+#define MAILBOX_BIOS_CMD_READ_C9C10_VOLTAGE 0x26
+#define MAILBOX_BIOS_CMD_WRITE_C9C10_VOLTAGE 0x27
+
/* Errors are returned back in bits 7:0 */
#define MAILBOX_BIOS_ERROR_NONE 0
#define MAILBOX_BIOS_ERROR_INVALID_COMMAND 1