Thanks! I'd already seen the #1 (#2) link in the FAQ and understood that. I'm not doing this from userland, so I was assuming it did not apply, although I was going to use it to play with in user space.
The #3 comes up as an error for me, the lists.linuxppc.org domain name does not resolve. Several other links in the FAQ do not resolve properly. One now points to a page that has paid links to other pages. thanks again, Wade On 8/21/06, Fillod Stephane <stephane.fillod at thomson.net> wrote: > > Your question is a linuxppc-embedded FAQ. User-land access > > is documented in Denx's FAQ[1], and accessible through shorter URL[2]. > > For more information, please follow this thread[3] (not ppc specific > actually). > > > > [1] > http://www.denx.de/twiki/bin/view/PPCEmbedded/DeviceDrivers#Section_AccessingPeripheralsFromUserSpace > > [2] http://tinyurl.com/6c7th > > [3] http://lists.linuxppc.org/linuxppc-embedded/200403/msg00059.html > > > > In kernel land, ioremap() is all you need. > > > > Don't forget to use the 'eieio' asm instruction if you want explicit I/O > ordering. > > > > Regards, > > -- > > Stephane > > > > > ------------------------------ > > *Envoy? :* lundi 21 ao?t 2006 15:51 > *Objet :* PPC beginner questions > > > > > I'm new to the PPC and I have a few questions. I have written a driver > in the past for the X86 family, using i/o ports, but it was kernel 2.0 and > i/o ports are not mmu handled. > I've been looking through the archive and I am slowly growing more > confused. > > We are using Xilinx with PPC built in. > > The PPC has a memory management unit. All of the IP we've added is > mapped to physical addresses. > > 1. Can I access the memory the peripherasl are mapped to directly > within the driver without going through functions? > if NOT, then Do I use > 1. ioremap(), > 2. request_mem_region(), > 3. request_region() > 4. something else? > > 2. Are there any gotcha's with the ppc 405 that Xilinx uses that I > should know about? > > > thanks, > wade > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20060821/4ef094d8/attachment.htm
