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To: "Maciej W. Rozycki" <>
Subject: Re: ISA
From: Geert Uytterhoeven <>
Date: Thu, 20 Dec 2001 14:45:53 +0100 (MET)
Cc: Alan Cox <>, Jun Sun <>,, Linux/MIPS Development <>
In-reply-to: <>
On Thu, 20 Dec 2001, Maciej W. Rozycki wrote:
> On Thu, 20 Dec 2001, Geert Uytterhoeven wrote:
> > >  Well, as I stated in another mail (but in another thread, I think) you
> > > may try request_mem_region(virt_to_phys(ioremap(...))), especially as you
> > > really want to reserve an area in the CPU's physical address space and not
> > > in the bus's one.
> > 
> > So we must update all existing drivers that use ISA memory space anyway.
>  Not many of them calls request_mem_region()...  Not that it is good. 
> > IMHO still better to add isa_request_mem_region() while we're at it, so we 
> > can
> > solve this in an arch-specific way. Ia32 can still say
> > 
> >     #define isa_request_mem_region  request_mem_region
>  And then "<bus>_request_mem_region" for every new bus supported??? 

Yes, you have <bus>_ioremap() anyway, since plain ioremap() is for PCI only.

And then struct busops starts looking like an interesting direction...



Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                                            -- Linus Torvalds

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