Specifications

6-16 I/O Port

Figure 6-3 Sparse Address Space Reads

The returned quadword data for a sparse window read command is repli-

cated four times on the first data word of the CSR write to broadcast space.

Figure 6-4 shows the positions within the TLSB data word in which the

sparse read data is returned.

Figure 6-4 Sparse Window Read Data as Presented on the TLSB

BXB0829.AI

0123456789101112131415161718192021222324252627282930313233343536373839

0123

Byte-Aligned I/O Address

<31:5> Byte-Aligned I/O Address <26:0>

<33:32> Space Select Field

01 = Sparse memory space 

10 = Sparse I/O space 

11 = Sparse configuration space

<35:34> Hose number in port being

addressed (0 - 3)

<38:36> TLSB Responder Node

0 - 4 Nodes 4 - 8 I/O window space, resp.



<39> I/O Select (always 1 for CSR transaction) 



VID

TLSB

Virtual ID

(VID) of

Commander Node

TLSB_ADR<39:0>

TLSB_BANK_NUM 

<3:0>

<4:3> Byte Length Field

0326496128160192224256

LW 1 LW 0 LW 1 LW 0 LW 1 LW 0 LW 1 LW 0

BXB0819.AI

CYC

Second data cycle is undefined