15 Oct
1999
15 Oct
'99
2:01 p.m.
Am Fri, 15 Oct 1999 schrieben Sie:
Christian Stueble stueble@amaunet.cs.uni-dortmund.de writes:
It is said that always the complete IO space should be specified as receive fpage, why?
?
With flexpages you can map a page to an arbitrary address by specifying an according receive flex page.
You are not allowed to do this with an IO-area. If someone grants you the right to access port X you can't change this to port Y by specifying a receive window in you IO address space. Therefore you have to specify your whole IO address space so that IO ports are always mapped one to one.
I think Fiasco/L4 uses memory mapped I/O, not separated I/O?
Chris
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Christian Stueble............stueble@ls6.cs.uni-dortmund.de
PubKey[BF7104F5].......fp=8678C5D3CAD9CD8C F1DDB8EC202F116A
To be or not to be is true... (apocrypha of George Boole)
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