/* The DSP window indices are fixed */
 #define SOF_IPC4_OUTBOX_WINDOW_IDX     1
+#define SOF_IPC4_DEBUG_WINDOW_IDX      2
 
 /**
  * struct sof_ipc4_fw_data - IPC4-specific data
 
        sdev->host_box.offset = outbox_offset;
        sdev->host_box.size = outbox_size;
 
+       sdev->debug_box.offset = snd_sof_dsp_get_window_offset(sdev,
+                                                       SOF_IPC4_DEBUG_WINDOW_IDX);
+
        dev_dbg(sdev->dev, "mailbox upstream 0x%x - size 0x%x\n",
                inbox_offset, inbox_size);
        dev_dbg(sdev->dev, "mailbox downstream 0x%x - size 0x%x\n",
                outbox_offset, outbox_size);
+       dev_dbg(sdev->dev, "debug box 0x%x\n", sdev->debug_box.offset);
 
        return sof_ipc4_init_msg_memory(sdev);
 }