uefi-raw: Add DevicePathProtocol

Author: nicholasbishop

uefi-raw/src/protocol/device_path.rs

@@ -0,0 +1,19 @@
+use crate::{guid, Guid};
+
+/// Device path protocol.
+///
+/// A device path contains one or more device path instances made of up
+/// variable-length nodes.
+///
+/// Note that the fields in this struct define the header at the start of each
+/// node; a device path is typically larger than these four bytes.
+#[repr(C)]
+pub struct DevicePathProtocol {
+    pub major_type: u8,
+    pub sub_type: u8,
+    pub length: [u8; 2],
+}
+
+impl DevicePathProtocol {
+    pub const GUID: Guid = guid!("09576e91-6d3f-11d2-8e39-00a0c969723b");
+}

uefi-raw/src/protocol/mod.rs

@@ -4,4 +4,5 @@
 //! ID. They can be implemented by a UEFI driver or occasionally by a
 //! UEFI application.
 
+pub mod device_path;
 pub mod rng;

uefi/src/proto/device_path/mod.rs

@@ -288,7 +288,7 @@ impl ToOwned for DevicePathInstance {
 /// [module-level documentation]: crate::proto::device_path
 /// [`END_ENTIRE`]: DeviceSubType::END_ENTIRE
 #[repr(C, packed)]
-#[unsafe_protocol("09576e91-6d3f-11d2-8e39-00a0c969723b")]
+#[unsafe_protocol(uefi_raw::protocol::device_path::DevicePathProtocol::GUID)]
 #[derive(Eq, Pointee)]
 pub struct DevicePath {
     data: [u8],