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910GL датащи(PDF) 165 Page - Intel Corporation |
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910GL датащи(HTML) 165 Page - Intel Corporation |
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165 / 426 page ![]() Host-PCI Express* Bridge Registers (D1:F0) (Intel® 82915G/82915P/82915PL Only) R Datasheet 165 8.1.49 VC0RCAP—VC0 Resource Capability (D1:F0) PCI Device: 1 Address Offset: 110h Default Value: 00000000h Access: RO Size: 32 bits Bit Access & Default Description 31:16 Reserved 15 RO 0b Reject Snoop Transactions 0 = Transactions with or without the No Snoop bit set within the TLP header are allowed on this VC. 1 = Any transaction without the No Snoop bit set within the TLP header will be rejected as an Unsupported Request. 14:0 Reserved 8.1.50 VC0RCTL—VC0 Resource Control (D1:F0) PCI Device: 1 Address Offset: 114h Default Value: 8000007Fh Access: RO, R/W Size: 32 bits This register controls the resources associated with PCI Express Virtual Channel 0. Bit Access & Default Description 31 RO 1b VC0 Enable: For VC0, this is hardwired to 1 and read only as VC0 can never be disabled. 30:27 Reserved 26:24 RO 000b VC0 ID: This field assigns a VC ID to the VC resource. For VC0 this is hardwired to 0 and read only. 23:8 Reserved 7:1 R/W 7Fh TC/VC0 Map: This field indicates the TCs (Traffic Classes) that are mapped to the VC resource. Bit locations within this field correspond to TC values. For example, when bit 7 is set in this field, TC7 is mapped to this VC resource. When more than one bit in this field is set, it indicates that multiple TCs are mapped to the VC resource. In order to remove one or more TCs from the TC/VC Map of an enabled VC, software must ensure that no new or outstanding transactions with the TC labels are targeted at the given Link. 0 RO 1b TC0/VC0 Map: Traffic Class 0 is always routed to VC0. |
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