Messages in this thread | | | Date | Fri, 5 Mar 1999 08:57:40 -0700 (MST) | From | Vassili Leonov <> | Subject | Re: user space writel() etc. in 2.2.2 |
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On Fri, 5 Mar 1999, Alan Cox wrote:
> > I don't like setting __KERNEL__ for user space allications, besides it > > produces a lot of errors when I try to compile. > > > > Q: what is the right way to access IO memory under 2.2.2 ? > > mmio space by using mmap() as with 2.0, and pc style io space with > inb inw etc (which are exported with __KERNEL__ not defined) So what you say is that instead of what amounts to
((*(volatile unsigned int *) ( base )) = ( v )) ;
for writel(v,base)
I should go into remapping /dev/mem and so forth? Why? Even from the performance prospective this is not right.
#------------------------------------# | Linux Media Labs LLC | Vassili Leonov #------------------------------------# mailto:vleo@linuxmedialabs.com http://linuxmedialabs.com phone:1-719-231-3173
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