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BURST Xactions CROSSING BAR BOUNDARIES
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: BURST Xactions CROSSING BAR BOUNDARIES
- From: kands@usa.net
- Date: Thu, 23 Jan 1997 15:56:51
- Resent-Date: Thu, 23 Jan 1997 15:56:51
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"2mu103.0.5G.1T1wo"@dart>
- Resent-Sender: pci-sig-request@znyx.com
Hi,
It is not very clear in the specs of PCI2.1 regarding the BURST Xactions
Crossing BAR BOUNDARY.
Let me be more exact on the problem. Suppose a Master Starts a Posted
Memory Xaction close the BAR BOUNDARY and during the Xaction crosses the
Boundary, Is it a must that the PCI target must issue a disconnect when
the Master crosses the Boundary or is it O.K if the PCI target takes
care by signalling to the application (the actual target where the write
was targeted) that the Master has crossed the boundary, and leaving the
responsiblity to the application to detect this condition and to issue
a disconnect to the target which whill in turn be reflected to the PCI
bus after say two clocks after the Master has crossed the BAR Boundary.
If it is a must that the target has to disconnect exactly at the BAR
Boundary, Pls. let me know where it has been specified in the specs.
--thanks
--kands
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