1 files changed, 89 insertions, 0 deletions
diff --git a/lib/efi_loader/efi_device_path_utilities.c b/lib/efi_loader/efi_device_path_utilities.c
new file mode 100644
index 0000000000..bc97eeee31
--- /dev/null
+++ b/lib/efi_loader/efi_device_path_utilities.c
@@ -0,0 +1,89 @@
+/*
+ *  EFI device path interface
+ *
+ *  Copyright (c) 2017 Leif Lindholm
+ *
+ *  SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <efi_loader.h>
+
+const efi_guid_t efi_guid_device_path_utilities_protocol =
+		EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID;
+
+static efi_uintn_t EFIAPI get_device_path_size(
+	const struct efi_device_path *device_path)
+{
+	efi_uintn_t sz = 0;
+
+	EFI_ENTRY("%p", device_path);
+	/* size includes the END node: */
+	if (device_path)
+		sz = efi_dp_size(device_path) + sizeof(struct efi_device_path);
+	return EFI_EXIT(sz);
+}
+
+static struct efi_device_path * EFIAPI duplicate_device_path(
+	const struct efi_device_path *device_path)
+{
+	EFI_ENTRY("%p", device_path);
+	return EFI_EXIT(efi_dp_dup(device_path));
+}
+
+static struct efi_device_path * EFIAPI append_device_path(
+	const struct efi_device_path *src1,
+	const struct efi_device_path *src2)
+{
+	EFI_ENTRY("%p, %p", src1, src2);
+	return EFI_EXIT(efi_dp_append(src1, src2));
+}
+
+static struct efi_device_path * EFIAPI append_device_node(
+	const struct efi_device_path *device_path,
+	const struct efi_device_path *device_node)
+{
+	EFI_ENTRY("%p, %p", device_path, device_node);
+	return EFI_EXIT(efi_dp_append_node(device_path, device_node));
+}
+
+static struct efi_device_path * EFIAPI append_device_path_instance(
+	const struct efi_device_path *device_path,
+	const struct efi_device_path *device_path_instance)
+{
+	EFI_ENTRY("%p, %p", device_path, device_path_instance);
+	return EFI_EXIT(NULL);
+}
+
+static struct efi_device_path * EFIAPI get_next_device_path_instance(
+	struct efi_device_path **device_path_instance,
+	efi_uintn_t *device_path_instance_size)
+{
+	EFI_ENTRY("%p, %p", device_path_instance, device_path_instance_size);
+	return EFI_EXIT(NULL);
+}
+
+static bool EFIAPI is_device_path_multi_instance(
+	const struct efi_device_path *device_path)
+{
+	EFI_ENTRY("%p", device_path);
+	return EFI_EXIT(false);
+}
+
+static struct efi_device_path * EFIAPI create_device_node(
+	uint8_t node_type, uint8_t node_sub_type, uint16_t node_length)
+{
+	EFI_ENTRY("%u, %u, %u", node_type, node_sub_type, node_length);
+	return EFI_EXIT(NULL);
+}
+
+const struct efi_device_path_utilities_protocol efi_device_path_utilities = {
+	.get_device_path_size = get_device_path_size,
+	.duplicate_device_path = duplicate_device_path,
+	.append_device_path = append_device_path,
+	.append_device_node = append_device_node,
+	.append_device_path_instance = append_device_path_instance,
+	.get_next_device_path_instance = get_next_device_path_instance,
+	.is_device_path_multi_instance = is_device_path_multi_instance,
+	.create_device_node = create_device_node,
+};