diff options
Diffstat (limited to 'src/include/gpxe/efi/Protocol/DevicePath.h')
| -rw-r--r-- | src/include/gpxe/efi/Protocol/DevicePath.h | 77 |
1 files changed, 26 insertions, 51 deletions
diff --git a/src/include/gpxe/efi/Protocol/DevicePath.h b/src/include/gpxe/efi/Protocol/DevicePath.h index 5fb7bf66..e847668f 100644 --- a/src/include/gpxe/efi/Protocol/DevicePath.h +++ b/src/include/gpxe/efi/Protocol/DevicePath.h @@ -40,10 +40,30 @@ #pragma pack(1) +/** + This protocol can be used on any device handle to obtain generic path/location + information concerning the physical device or logical device. If the handle does + not logically map to a physical device, the handle may not necessarily support + the device path protocol. The device path describes the location of the device + the handle is for. The size of the Device Path can be determined from the structures + that make up the Device Path. +**/ typedef struct { - UINT8 Type; - UINT8 SubType; - UINT8 Length[2]; + UINT8 Type; ///< 0x01 Hardware Device Path + ///< 0x02 ACPI Device Path + ///< 0x03 Messaging Device Path + ///< 0x04 Media Device Path + ///< 0x05 BIOS Boot Specification Device Path + ///< 0x7F End of Hardware Device Path + + UINT8 SubType; ///< Varies by Type + ///< 0xFF End Entire Device Path, or + ///< 0x01 End This Instance of a Device Path and start a new + ///< Device Path + + UINT8 Length[2]; ///< Specific Device Path data. Type and Sub-Type define + ///< type of data. Size of data is included in Length. + } EFI_DEVICE_PATH_PROTOCOL; /// @@ -110,6 +130,7 @@ typedef struct { /// /// Optional variable length _HIDSTR /// Optional variable length _UIDSTR + /// Optional variable length _CIDSTR /// } ACPI_EXTENDED_HID_DEVICE_PATH; @@ -505,55 +526,9 @@ typedef union { #pragma pack() -#define EFI_DP_TYPE_MASK 0x7F -#define EFI_DP_TYPE_UNPACKED 0x80 #define END_DEVICE_PATH_TYPE 0x7f - -#define EFI_END_ENTIRE_DEVICE_PATH 0xff -#define EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE 0xff -#define EFI_END_INSTANCE_DEVICE_PATH 0x01 -#define END_ENTIRE_DEVICE_PATH_SUBTYPE EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE -#define END_INSTANCE_DEVICE_PATH_SUBTYPE EFI_END_INSTANCE_DEVICE_PATH - -#define EFI_END_DEVICE_PATH_LENGTH (sizeof (EFI_DEVICE_PATH_PROTOCOL)) -#define END_DEVICE_PATH_LENGTH EFI_END_DEVICE_PATH_LENGTH - -#define DP_IS_END_TYPE(a) -#define DP_IS_END_SUBTYPE(a) (((a)->SubType == END_ENTIRE_DEVICE_PATH_SUBTYPE) -#define DevicePathSubType(a) ((a)->SubType) -#define IsDevicePathUnpacked(a) ((a)->Type & EFI_DP_TYPE_UNPACKED) - -#define EfiDevicePathNodeLength(a) (((a)->Length[0]) | ((a)->Length[1] << 8)) -#define DevicePathNodeLength(a) (EfiDevicePathNodeLength(a)) -#define EfiNextDevicePathNode(a) ((EFI_DEVICE_PATH_PROTOCOL *) (((UINT8 *) (a)) + EfiDevicePathNodeLength (a))) -#define NextDevicePathNode(a) (EfiNextDevicePathNode(a)) - -#define EfiDevicePathType(a) (((a)->Type) & EFI_DP_TYPE_MASK) -#define DevicePathType(a) (EfiDevicePathType(a)) -#define EfiIsDevicePathEndType(a) (EfiDevicePathType (a) == END_DEVICE_PATH_TYPE) -#define IsDevicePathEndType(a) (EfiIsDevicePathEndType(a)) - - -#define EfiIsDevicePathEndSubType(a) ((a)->SubType == EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE) -#define IsDevicePathEndSubType(a) (EfiIsDevicePathEndSubType(a)) -#define EfiIsDevicePathEndInstanceSubType(a) ((a)->SubType == EFI_END_INSTANCE_DEVICE_PATH) - -#define EfiIsDevicePathEnd(a) (EfiIsDevicePathEndType (a) && EfiIsDevicePathEndSubType (a)) -#define IsDevicePathEnd(a) (EfiIsDevicePathEnd(a)) -#define EfiIsDevicePathEndInstance(a) (EfiIsDevicePathEndType (a) && EfiIsDevicePathEndInstanceSubType (a)) - - -#define SetDevicePathNodeLength(a,l) { \ - (a)->Length[0] = (UINT8) (l); \ - (a)->Length[1] = (UINT8) ((l) >> 8); \ - } - -#define SetDevicePathEndNode(a) { \ - (a)->Type = END_DEVICE_PATH_TYPE; \ - (a)->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE; \ - (a)->Length[0] = sizeof(EFI_DEVICE_PATH_PROTOCOL); \ - (a)->Length[1] = 0; \ - } +#define END_ENTIRE_DEVICE_PATH_SUBTYPE 0xFF +#define END_INSTANCE_DEVICE_PATH_SUBTYPE 0x01 extern EFI_GUID gEfiDevicePathProtocolGuid; |