GDBGFIFOSPACE (USB3_XHCI) Register Description
| Register Name | GDBGFIFOSPACE |
|---|---|
| Offset Address | 0x000000C160 |
| Absolute Address |
0x00FE20C160 (USB3_0_XHCI) 0x00FE30C160 (USB3_1_XHCI) |
| Width | 32 |
| Type | mixedMixed types. See bit-field details. |
| Reset Value | 0x00420000 |
| Description | Global Debug Queue/FIFO Space Available Register Bit Bash test should not be done on this debug register. |
GDBGFIFOSPACE (USB3_XHCI) Register Bit-Field Summary
| Field Name | Bits | Type | Reset Value | Description |
|---|---|---|---|---|
| SPACE_AVAILABLE | 31:16 | roRead-only | 0x42 | SPACE_AVAILABLE |
| Reserved | 15:9 | roRead-only | 0x0 | Reserved |
| FIFO_QUEUE_SELECT | 8:0 | rwNormal read/write | 0x0 | FIFO/Queue Select (or) Port-Select - FIFO/Queue Select[8:5] indicates the FIFO/Queue Type - FIFO/Queue Select[4:0] indicates the FIFO/Queue Number For example, 9b0_0010_0001 refers to RxFIFO_1 and 9b0_0101_1110 refers to TxReqQ_30. - 9b0_0001_1111 to 9b0_0000_0000: TxFIFO_31 to TxFIFO_0 - 9b0_0011_1111 to 9b0_0010_0000: RxFIFO_31 to RxFIFO_0 - 9b0_0101_1111 to 9b0_0100_0000: TxReqQ_31 to TxReqQ_0 - 9b0_0111_1111 to 9b0_0110_0000: RxReqQ_31 to RxReqQ_0 - 9b0_1001_1111 to 9b0_1000_0000: RxInfoQ_31 to RxInfoQ_0 - 9b0_1010_0000: DescFetchQ_0 (for backwards compatibility) - 9b0_1010_0001: EventQ_0 (for backwards compatibility) - 9b0_1010_0010: ProtocolStatusQ_0 - 9b0_1101_1111 to 9b0_1110_0000: DescFetchQ_31 to DescFetchQ_0 - 9b0_1111_1111 to 9b0_1110_0000: WriteBack/EventQ_31 to WriteBack/EventQ_0 - 9b1_0000_0111 to 9b1_0000_0000: AuxEventQ_7 to AuxEventQ_0 (if EN_SEPARATE_DESC_QUEUES=1) Port-Select[3:0] selects the port-number when accessing GDBGLTSSM register. |