Implement the CreateDeviceNode service of the device path utility protocol.
Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
include/efi_loader.h | 5 ++++-
lib/efi_loader/efi_device_path.c | 15 +++++++++++++++
lib/efi_loader/efi_device_path_utilities.c | 17 ++++++++++++++++-
3 files changed, 35 insertions(+), 2 deletions(-)
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 17f9d3d1ef..0358bcb1d7 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -330,7 +330,10 @@ struct efi_device_path *efi_dp_append(const struct
efi_device_path *dp1,
const struct efi_device_path *dp2);
struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
const struct efi_device_path *node);
-
+/* Create a device path node of given type, sub-type, length */
+struct efi_device_path *efi_dp_create_device_node(const u8 type,
+ const u8 sub_type,
+ const u16 length);
struct efi_device_path *efi_dp_from_dev(struct udevice *dev);
struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index ab28b2fd25..801c1558e5 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -315,6 +315,21 @@ struct efi_device_path *efi_dp_append_node(const struct
efi_device_path *dp,
return ret;
}
+struct efi_device_path *efi_dp_create_device_node(const u8 type,
+ const u8 sub_type,
+ const u16 length)
+{
+ struct efi_device_path *ret;
+
+ ret = dp_alloc(length);
+ if (!ret)
+ return ret;
+ ret->type = type;
+ ret->sub_type = sub_type;
+ ret->length = length;
+ return ret;
+}
+
#ifdef CONFIG_DM
/* size of device-path not including END node for device and all parents
* up to the root device.
diff --git a/lib/efi_loader/efi_device_path_utilities.c
b/lib/efi_loader/efi_device_path_utilities.c
index bc97eeee31..e73188b242 100644
--- a/lib/efi_loader/efi_device_path_utilities.c
+++ b/lib/efi_loader/efi_device_path_utilities.c
@@ -70,11 +70,26 @@ static bool EFIAPI is_device_path_multi_instance(
return EFI_EXIT(false);
}
+/*
+ * Create device node.
+ *
+ * This function implements the CreateDeviceNode service of the device path
+ * utilities protocol.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification
+ * for details.
+ *
+ * @node_type node type
+ * @node_sub_type node sub type
+ * @node_length node length
+ * @return device path node
+ */
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);
+ return EFI_EXIT(efi_dp_create_device_node(node_type, node_sub_type,
+ node_length));
}
const struct efi_device_path_utilities_protocol efi_device_path_utilities = {
--
2.14.2
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