[U-Boot] U-Boot/IXP

[Marek Vasut <marex@denx.de>]

Dear Bryan Hundven,

> On Mon, Mar 5, 2012 at 2:09 PM, Marek Vasut <marex@denx.de> wrote:
> > Dear Bryan Hundven,
> > 
> >> On Mon, Mar 5, 2012 at 12:15 PM, Marek Vasut <marex@denx.de> wrote:
> >> > Dear Michael Schwingen,
> >> > 
> >> >> Am 03/05/2012 12:54 PM, schrieb Marek Vasut:
> >> >> > Dear Michael Schwingen,
> >> >> > 
> >> >> >> On Mon, Mar 05, 2012 at 02:14:56AM +0100, Marek Vasut wrote:
> >> >> >>> Dear Michael Schwingen,
> >> >> >>> 
> >> >> >>> do you still intend to maintain IXP support in uboot or can all
> >> >> >>> those IXP boards be removed? I'd be great if you helped bringing
> >> >> >>> them back in-line!
> >> >> >> 
> >> >> >> I still use them and would want to keep these boards (and maintain
> >> >> >> them).
> >> >> >> 
> >> >> >> I only glimpse at the mailing list from time to time - are there
> >> >> >> any open problems with these boards that need to be addressed?
> >> >> > 
> >> >> > No, I just cannot compile it with usual arm-linux-gnueabi-
> >> >> > toolchain and that puts a bleep on my bug-radar. Is that normal?
> >> >> > Do I need a special toolchain?
> >> >> 
> >> >> I am using an old, locally built toolchain that identifies itself as
> >> >> gcc version 4.3.4 (crosstool-NG-hg_default at 1471_4a88cb9bfe8f)
> >> >> 
> >> >> I can take a look at this using a newer toolchain - however, I am in
> >> >> the process of moving, so this will probably take some weeks.
> >> >> 
> >> >> What prebuilt toolchain should I try?
> >> > 
> >> > I was more curious if it's possible for me myself to build these. And
> >> > if so, can that be done with usual arm-linux-gnueabi- toolchain? Or
> >> > do I need special armeb toolchain compiled in some special way?
> >> 
> >> I've built a new armeb xscale toolchain available here if you want to
> >> try it.
> >> https://sourceforge.net/projects/bhundven.u/files/armeb-unknown-linux-gn
> >> ue abi.tar.bz2/download
> >> 
> >> I built it on x86_64. I can build it on 32-bit intel if you don't have
> >> an x86_64 build box. Let me know.
> >> 
> >> $ ct-ng show-armeb-unknown-linux-gnueabi
> >> armeb-unknown-linux-gnueabi  [L X]
> >>     OS             : linux-3.2.8
> >>     Companion libs : gmp-5.0.2 mpfr-3.1.0 ppl-0.11.2 cloog-ppl-0.15.11
> >> mpc-0.9 libelf-0.8.13
> >>     binutils       : binutils-2.22
> >>     C compiler     : gcc-4.6.3
> >> (C,C++,Fortran,Java,Objective-C,Objective-C++) C library      :
> >> eglibc-2_15
> >>     Tools          : dmalloc-5.5.2 duma-2_5_15 gdb-7.3a ltrace-0.5.3
> >> strace-4.6
> > 
> > Ok, that's good. But can someone please answer my question (now there are
> > two)?
> > 
> > 1) Does usual arm-linux-gnueabi- toolchain work? (possibly if I use some
> > switch to toggle arm core endianness)
> 
> No, the arm and armeb toolchains are different tuples.
> 
> > 2) Do I need any special options to build the toolchain?
> 
> You have to build an armeb toolchain with armeb as the platform in the
> tuple. I don't see one on mentorgraphic's site.
> I'm not sure if you can build a multilib arm/armeb toolchain.

And what's the actual difference in the output code? Is it just that the code is 
compiled for xscale core (as usual) and the instructions are flipped or is there 
something else?

Best regards,
Marek Vasut