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RE: LX4180
- To: "Xavier Wang" <xavierwang at ms19 dot url dot com dot tw>
- Subject: RE: [ECOS] LX4180
- From: "Jurica Baricevic" <jura at INTESIS dot hr>
- Date: Fri, 27 Oct 2000 15:34:20 +0200
- Cc: "Ecos" <ecos-discuss at sourceware dot cygnus dot com>
Xavier wrote:
> I tried to build eCos for Lexra LX4180 which is a MIPS
> R3000-like CPU. It seems to be a good start from building
> GNU toolchains and eCos for Toshiba TX39. But I found
> that TX39 seems to have instructions that are not in the
> standard ISA I instruction set, such as Branch Likely and
> ISA III cache instructions. So, is it possible to configure
> GCC to generate only standard ISA I instructions?
Probably the best solution would be to configure GCC to support your
specific processor architecture by default (i.e. I am using
'mipsel-r3041-elf-gcc'). There is also possibility to build GCC for any MIPS
ISA architecture ('mips-any-elf-gcc'). In that case, you should provide GCC
with some specific options (egg '-mcpu=r3000'), when building eCos.
Anyway, since you have intention to run eCos on a R3000 MIPS, you may have
some problems with a 'load delay slot'. Please, check the ecos-discuss
mailing list archive:
http://sources.redhat.com/ml/ecos-discuss/2000-06/msg00003.html
http://sources.redhat.com/ml/ecos-discuss/2000-06/msg00014.html
http://sources.redhat.com/ml/ecos-discuss/2000-06/msg00024.html
Regards,
Jura