Re: FW: Delayed Xaction and LOCK#

[Alan Deikman <alan@znyx.com>]

The posting address is pci-sig@znyx.com instead of pci-sig-request.

At 06:16 PM 8/27/96 -0700, you wrote:
>Monish Shah <monish@mcsy2.fc.hp.com> wrote...
>> My original comment:
>> 
>> > >> use of LOCK# should be avoided if at all possible.
>
>....<snip>....
>
>What about the opposite situation?  Perhaps, a card which is NOT a bus master,
>only a target, that has structures in its own memory that are used to
>communicate between the host and the local processor.  If the host needs to
>update these structures, it needs to do a locked exchange of the mutex
>semaphore before proceeding...  If in fact, the cpu lock prefix doesn't
>actually lock the PCI bus between the read and write, this method is not
>safe....
>
>

--------------------------------
  Alan Deikman, ZNYX Corporation
  alan@znyx.com
—
TB