Hi, Anton. Your proposal is also interesting :-) It is well-documented hardware?
IT ________________________________ Da: Антон Кочков <anton.koch...@gmail.com> A: Peter Maydell <peter.mayd...@linaro.org> Cc: Alessandro <hyperboreus2...@yahoo.it>; qemu-devel@nongnu.org Inviato: Mar 3 maggio 2011, 00:04:13 Oggetto: Re: [Qemu-devel] implementing ARM926EJ-S support Alessandro, I think you can try add support for one of the Qualcomm MSM6100, MSM6125, MSM6225, MSM6245, MSM6250, MSM6255A, MSM6260, MSM6275, MSM6280, MSM6300, MSM6500, MSM6800; Of course, if you dont know yet which you want. Best regards, Anton Kochkov. On Tue, May 3, 2011 at 01:04, Peter Maydell <peter.mayd...@linaro.org> wrote: > On 2 May 2011 13:46, Alessandro <hyperboreus2...@yahoo.it> wrote: >> ARM core-related code appears to be located (mainly)under ARM directory; >> peripherals-related files should be located under "machine" dir. > > I'm not sure what source tree you're looking at. Code for ARM core > as a target is in target-arm/. Device models are in hw/. (tcg/arm > is support for emulating other CPUs on an ARM host, so not relevant > for you.) > >> I still have some questions about QEMU ARM926 support: >> >> 1- What standard extensions are supported? e.g Jazelle. > > We don't support Jazelle. We don't implement the TCMs (in the same > way we don't implement caches). We probably don't get all the > device-specific cp15 registers right. (None of that is likely to be > of any practical importance.) I can't see anything else missing from > a quick scan. > > The rough rule of thumb for support is "if Linux uses it it's almost > certainly supported; otherwise it might be missing or broken" :-) > >> 2- Sometimes, SoC includes "inusual"(and _poorly_ documented) hardware: ISP, >> video Coproc, and so on. >> This increase significantly the final complexity of project. What are the >> "guidelines" to follow? What must be implemented, and what could be safely >> ignored? > > Well, if you're just doing things for your own amusement you can > implement or leave out what you like. For things to be included > in QEMU my personal opinion (I don't have a veto or anything) would > be that the question is whether there's any benefit to the new > SoC model that the existing ones don't provide -- is it some > common piece of hardware that a lot of people own and might want > to use a model of, for example? If you pass that hurdle then there > is presumably an OS and set of applications that run on the real > hardware, and the minimum level of peripheral support would be > "enough to run that". > > What SoC are you planning to model? I assume you have one in > mind since you were specific about wanting the ARM926 rather > than a more recent ARM core... > > -- PMM > >
