On Sat, Apr 28, 2001 at 01:27:30AM -0500, daniel sheltraw wrote:
> I have a busmaster question I am hoping you can help me with.
> If a PCI device is acting as a busmaster and the processor initiates a
> read/write to another device on the PCI bus while the busmater-device is in
> control of the bus what happens to the instructions initiated by the
> processor? Are they never seen by the device that the processor
> is trying to read/write?
The access by the processor is delayed until the PCI arbiter allows the
CPU access to the PCI bus (how long depends on all sorts of things which
I won't go into, but its not necessarily held off until the end of the
busmaster transfer).
--
Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html
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This archive was generated by hypermail 2b29 : Mon Apr 30 2001 - 21:00:20 EST