Specifications

I/O Port 6-57

DMA Masked Write with Data

The DMA Masked Write Packet is a request on the Up Hose from the I/O

bus adapter to the I/O port for a TLSB data write transaction.

Any combination of mask bits is allowed. However, the I/O bus adapter

may or may not support this capability. A mask bit is set to write the cor-

responding byte of data.

This packet is supported by the Mailbox Only, I/O Window, Full, and Mem-

ory Channel variants of the hose protocol. Figure 6-27 shows the DMA

Masked Write packet.

Figure 6-27 DMA Masked Write Packet

Table 6-29 gives the description of the DMA Masked Write packet.

31 24 23 11 10 087

xxxx 0 0 0 0 0 0 0 0 0 0 0 0 LEN ADR <39:32>

BXB-0645-93

DND <31:0>

1*



2



3



4



17



* = Clock cycle

LWDATA1 <31:0>

LWDATA2 <31:0>

LWDATA15 <31:0>

LWDATA16 <31:0>

ADDRESS <31:0>

0111

UPCTL

xxxx

M<3:0>