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PCI7421 Datasheet(PDF) 217 Page - Texas Instruments |
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PCI7421 Datasheet(HTML) 217 Page - Texas Instruments |
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217 / 298 page  8−37 8.38 Physical Request Filter Low Register The physical request filter low set/clear register enables physical receive requests on a per-node basis, and handles the lower node IDs. When a packet is destined for the physical request context, and the node ID has been compared against the asynchronous request filter registers, then the node ID comparison is done again with this register. If the bit corresponding to the node ID is not set to 1 in this register, then the request is handled by the asynchronous request context instead of the physical request context. See Table 8−30 for a complete description of the register contents. Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Name Physical request filter low Type RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Name Physical request filter low Type RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC RSC Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Register: Physical request filter low Offset: 118h set register 11Ch clear register Type: Read/Set/Clear Default: 0000 0000h Table 8−30. Physical Request Filter Low Register Description BIT FIELD NAME TYPE DESCRIPTION 31 physReqResource31 RSC If bit 31 is set to 1 for local bus node number 31, physical requests received by the controller from that node are handled through the physical request context. 30 physReqResource30 RSC If bit 30 is set to 1 for local bus node number 30, physical requests received by the controller from that node are handled through the physical request context. 29−2 physReqResourcen RSC Bits 29 through 2 (physReqResourcen, where n = 29, 28, 27, …, 2) follow the same pattern as bits 31 and 30. 1 physReqResource1 RSC If bit 1 is set to 1 for local bus node number 1, physical requests received by the controller from that node are handled through the physical request context. 0 physReqResource0 RSC If bit 0 is set to 1 for local bus node number 0, physical requests received by the controller from that node are handled through the physical request context. 8.39 Physical Upper Bound Register (Optional Register) The physical upper bound register is an optional register and is not implemented. This register returns all 0s when read. Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Name Physical upper bound Type R R R R R R R R R R R R R R R R Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Name Physical upper bound Type R R R R R R R R R R R R R R R R Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Register: Physical upper bound Offset: 120h Type: Read-only Default: 0000 0000h |
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