diff --git a/meta-yadro/meta-nicole/recipes-phosphor/dbus/phosphor-dbus-interfaces/xyz/openbmc_project/Control/Boot/Mailbox.interface.yaml b/meta-yadro/meta-nicole/recipes-phosphor/dbus/phosphor-dbus-interfaces/xyz/openbmc_project/Control/Boot/Mailbox.interface.yaml
new file mode 100644
index 0000000..839e8be
--- /dev/null
+++ b/meta-yadro/meta-nicole/recipes-phosphor/dbus/phosphor-dbus-interfaces/xyz/openbmc_project/Control/Boot/Mailbox.interface.yaml
@@ -0,0 +1,63 @@
+description: >
+    Implement to provide the boot initiator (such as Petitboot or UEFI)
+    with its specific parameters. This is based on IPMI 2.0 Table 28-14
+    'Boot Option Parameters' parameter 7 'Boot initiator mailbox'.
+
+properties:
+    - name: Supported
+      type: boolean
+      flags:
+        - const
+      default: false
+      description: >
+          Specifies whether or not the mailbox is supported by the
+          boot initiator on this machine.
+
+          The property is constant and is only set by the implementation
+          on startup.
+
+    - name: IANAEnterpriseNumber
+      type: uint32
+      flags:
+        - const
+      default: 0
+      description: >
+          The 24-bit IANA Private Enterprise Number for the company or organization
+          that has specified the boot initiator. This is a machine-specific
+          constant. The implementing application is responsible for setting
+          this to the proper machine-specific value (0x000000..0xFFFFFF)
+          according to https://www.iana.org/assignments/enterprise-numbers/enterprise-numbers.
+
+          The property is constant and is only set by the implementation
+          on startup.
+
+    - name: Data
+      type: array[byte]
+      description: >
+          The array of data bytes for the boot initiator to treat
+          in its specific way. This interface doesn't impose any
+          limitiations on the format or make any assumptions regarding
+          it. The boot initiator is responsible for parsing this array.
+
+          The size of the array is a constant depending on the requirements
+          set by the boot initiator used for a particular architecture or
+          a machine. The implementing application is responsible for setting
+          the size of this array to the proper value.
+
+          For conformance to the IPMI 2.0 specification, the size of the array
+          plus 3 (the size of IPMI 2.0 representation of IANA Enterprise Number)
+          must be a multiple of 16 with the minimum allowed size being 77
+          (5 x 16-byte blocks, minus 3) if mailbox is at all Supported.
+
+          For IPMI 2.0 this array is supposed to be split into 16-byte
+          blocks by the implementing service (block 0 being made of IANA PEN
+          plus first 13 bytes of this array). Please pay special attention
+          that this array does NOT include the IANA PEN needed for IPMI 2.0.
+          Only the actual PEN-specific data is stored here.
+
+          When partially written to, the remaining parts of this array
+          must not be automatically cleared. This is per IPMI 2.0
+          specification.
+
+          Other interfaces to the boot initiator (such as MCTP) may process
+          this array differently.
diff --git a/meta-yadro/meta-nicole/recipes-phosphor/dbus/phosphor-dbus-interfaces_%.bbappend b/meta-yadro/meta-nicole/recipes-phosphor/dbus/phosphor-dbus-interfaces_%.bbappend
new file mode 100644
index 0000000..656e151
--- /dev/null
+++ b/meta-yadro/meta-nicole/recipes-phosphor/dbus/phosphor-dbus-interfaces_%.bbappend
@@ -0,0 +1,15 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+
+# Directory with new layer of source tree with additional files
+YAML_DIR = "xyz"
+
+SRC_URI += "file://${YAML_DIR}"
+
+S = "${WORKDIR}/git"
+
+# Merge source tree by original project with our layer of additional files
+do_add_yamls(){
+    cp -r "${WORKDIR}/${YAML_DIR}" "${S}"
+}
+
+addtask do_add_yamls after do_unpack before do_configure