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efi_loader: Uart device path

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When uploading an EFI binary via the UART we need to assign a device path.

* Provide devicepath node to text conversion for Uart() node.
* Provide function to create Uart() device path.
* Add UART support to efi_dp_from_name().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2021-03-19 02:49:54 +01:00
parent 134d3387e1
commit f027222ad8
3 changed files with 55 additions and 9 deletions
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10
include/efi_api.h
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@ -523,6 +523,7 @@ struct efi_device_path_acpi_path {
# define DEVICE_PATH_SUB_TYPE_MSG_SCSI 0x02
# define DEVICE_PATH_SUB_TYPE_MSG_USB 0x05
# define DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR 0x0b
# define DEVICE_PATH_SUB_TYPE_MSG_UART 0x0e
# define DEVICE_PATH_SUB_TYPE_MSG_USB_CLASS 0x0f
# define DEVICE_PATH_SUB_TYPE_MSG_SATA 0x12
# define DEVICE_PATH_SUB_TYPE_MSG_NVME 0x17
@ -542,6 +543,15 @@ struct efi_device_path_scsi {
u16 logical_unit_number;
} __packed;
struct efi_device_path_uart {
struct efi_device_path dp;
u32 reserved;
u64 baud_rate;
u8 data_bits;
u8 parity;
u8 stop_bits;
} __packed;
struct efi_device_path_usb {
struct efi_device_path dp;
u8 parent_port_number;