* [ECOS] LX4180 @ 2000-10-27 5:54 Xavier Wang 2000-10-27 6:36 ` Jurica Baricevic 0 siblings, 1 reply; 2+ messages in thread From: Xavier Wang @ 2000-10-27 5:54 UTC (permalink / raw) To: ecos-discuss Hi, 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? Thanks. -- Xavier ^ permalink raw reply [flat|nested] 2+ messages in thread
* RE: [ECOS] LX4180 2000-10-27 5:54 [ECOS] LX4180 Xavier Wang @ 2000-10-27 6:36 ` Jurica Baricevic 0 siblings, 0 replies; 2+ messages in thread From: Jurica Baricevic @ 2000-10-27 6:36 UTC (permalink / raw) To: Xavier Wang; +Cc: Ecos 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 ^ permalink raw reply [flat|nested] 2+ messages in thread
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