ASoC: SOF: ipc4: add a command to start GDB

Add an IPC4 message type to start a firmware GDB debugging session.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

include/sound/sof/ipc4/header.h

@@ -123,8 +123,9 @@ enum sof_ipc4_global_msg {
 	/* Notification (FW to SW driver) */
 	SOF_IPC4_GLB_NOTIFICATION,
 
-	/* 28 .. 31: RESERVED - do not use */
+	/* 28 .. 30: RESERVED - do not use */
 
+	SOF_IPC4_GLB_ENTER_GDB = 31,
 	SOF_IPC4_GLB_TYPE_LAST,
 };
 

sound/soc/sof/ipc4.c

@@ -149,6 +149,7 @@ static const char * const ipc4_dbg_glb_msg_type[] = {
 	DBG_IPC4_MSG_TYPE_ENTRY(GLB_BOOT_CONFIG),
 	DBG_IPC4_MSG_TYPE_ENTRY(GLB_ROM_CONTROL),
 	DBG_IPC4_MSG_TYPE_ENTRY(GLB_IPCGATEWAY_CMD),
+	DBG_IPC4_MSG_TYPE_ENTRY(GLB_ENTER_GDB),
 	DBG_IPC4_MSG_TYPE_ENTRY(GLB_PERF_MEASUREMENTS_CMD),
 	DBG_IPC4_MSG_TYPE_ENTRY(GLB_CHAIN_DMA),
 	DBG_IPC4_MSG_TYPE_ENTRY(GLB_LOAD_MULTIPLE_MODULES),