Messages in this thread | | | Subject | Re: [linux-fbdev] Re: request_region for MMIO? | From | Jes Sorensen <> | Date | 01 Feb 1999 14:28:12 +0100 |
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>>>>> "Geert" == Geert Uytterhoeven <Geert.Uytterhoeven@cs.kuleuven.ac.be> writes:
Geert> On 1 Feb 1999, Jes Sorensen wrote: >> >>>>> "Geert" == Geert Uytterhoeven >> <Geert.Uytterhoeven@cs.kuleuven.ac.be> writes: Geert> Is it OK to use request_region() for claiming memory mapped I/O Geert> registers? >> Certainly not. >> Geert> Is there any good reason why
Oh did I get you wrong here, do you mean PCI I/O registers that just happen to be mem mapped on non x86 architectures or do you actually mean PCI shared memory type registers?
Geert> while get_ioport_list() uses `%04lx' to print the claimed Geert> regions? This makes me think I should use request_region() for Geert> `PC' I/O port regions only. >> Correct
Geert> Then what should I use?
For I/O port type things you use request_region(), for real shared memory there is currently no mechanism afaik.
Geert> BTW, on m68k we never used request_region() and friends, so we Geert> are wasting memory for that 128-entry table in Geert> kernel/resource.c ;-(
We will need it for supporting the ISA bus bridges for the Amiga, Atari and other boxes.
Jes
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