* qemu and barebox @ 2018-07-18 13:02 Giuseppe Levi 2018-07-18 13:44 ` Roland Hieber 2018-07-18 14:03 ` Alessandro Rubini 0 siblings, 2 replies; 6+ messages in thread From: Giuseppe Levi @ 2018-07-18 13:02 UTC (permalink / raw) To: barebox Hi all, i'm trying to run barebox using qemu because I need to develop and emulate a spacial boot configuration of the CERN White Rabbit switch (http://white-rabbit.web.cern.ch/). I used the ARCH=arm and CROSS_COMPILE=aarch64-linux-gnu- Selected the qemu virt board in menuconfig. Compilation seems ok but when trying qemu-system-aarch64 -m 2048M -cpu cortex-a57 -machine virt -display none -serial stdio -kernel barebox The system does not give me any output eve if is running using 100% of one core on my 4 core machine. The final goal would be to setup barebox to boot from network and then arrange a bootp server un another virtual machine. What I'm doing wrong ? is the CPU type cortex-a57 correct even if in menuconfig the type is market as Atemel-AT91 ? Thenks, Giuseppe Levi -- Dr. Giuseppe Levi Physics Dpt and INFN viale Berti Pichat 6/2 40127 BOLOGNA Mobile: +39 393 0086704 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: qemu and barebox 2018-07-18 13:02 qemu and barebox Giuseppe Levi @ 2018-07-18 13:44 ` Roland Hieber 2018-07-18 14:03 ` Alessandro Rubini 1 sibling, 0 replies; 6+ messages in thread From: Roland Hieber @ 2018-07-18 13:44 UTC (permalink / raw) To: Giuseppe Levi; +Cc: barebox Hi Giuseppe, this was discussed recently; see https://www.mail-archive.com/barebox@lists.infradead.org/msg27074.html tldr: there are issues with QEMU and ARM64, and no solution yet. - Roland On Wed, Jul 18, 2018 at 03:02:48PM +0200, Giuseppe Levi wrote: > Hi all, > i'm trying to run barebox using qemu because I need to develop and > emulate a spacial boot configuration of the CERN White Rabbit switch > (http://white-rabbit.web.cern.ch/). > I used the ARCH=arm > and CROSS_COMPILE=aarch64-linux-gnu- > > Selected the qemu virt board in menuconfig. > > Compilation seems ok but when trying > qemu-system-aarch64 -m 2048M -cpu cortex-a57 -machine virt -display > none -serial stdio -kernel barebox > > The system does not give me any output eve if is running using 100% of > one core on my 4 core machine. > > The final goal would be to setup barebox to boot from network and then > arrange a bootp server un another virtual machine. > > What I'm doing wrong ? is the CPU type cortex-a57 correct even if in > menuconfig the type is market as Atemel-AT91 ? > > > > Thenks, Giuseppe Levi -- Roland Hieber | r.hieber@pengutronix.de | Pengutronix e.K. | https://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim | Phone: +49-5121-206917-5086 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: qemu and barebox 2018-07-18 13:02 qemu and barebox Giuseppe Levi 2018-07-18 13:44 ` Roland Hieber @ 2018-07-18 14:03 ` Alessandro Rubini 2018-07-18 18:50 ` Giuseppe Levi 1 sibling, 1 reply; 6+ messages in thread From: Alessandro Rubini @ 2018-07-18 14:03 UTC (permalink / raw) To: giuseppe.levi; +Cc: barebox Hello. > emulate a spacial boot configuration of the CERN White Rabbit switch > (http://white-rabbit.web.cern.ch/). The White Rabbit switch is AT91SAM9G45 (I have one on my desk). Unless your own WR switch is a new design running on cortex-a57, you shoul cross-compile for arm32 and use a corresponding qemu configuration. /alessandro _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: qemu and barebox 2018-07-18 14:03 ` Alessandro Rubini @ 2018-07-18 18:50 ` Giuseppe Levi 2018-07-18 19:53 ` Andrey Smirnov 2018-07-18 20:39 ` Alessandro Rubini 0 siblings, 2 replies; 6+ messages in thread From: Giuseppe Levi @ 2018-07-18 18:50 UTC (permalink / raw) To: Alessandro Rubini; +Cc: barebox Ok tried with CROSS_COMPILE=arm-linux-gnueabi- this should be 32bit arm then: qemu-system-arm -m 256M -machine virt -display none -serial stdio -kernel barebox hangs..... any idea ? Should I use a different machine ? It would be very complex to create a White Rabbit virtual machine ? (HW description is open) 2018-07-18 16:03 GMT+02:00 Alessandro Rubini <rubini-list@gnudd.com>: > Hello. > >> emulate a spacial boot configuration of the CERN White Rabbit switch >> (http://white-rabbit.web.cern.ch/). > > The White Rabbit switch is AT91SAM9G45 (I have one on my desk). > Unless your own WR switch is a new design running on cortex-a57, you > shoul cross-compile for arm32 and use a corresponding qemu > configuration. > > /alessandro -- Dr. Giuseppe Levi Physics Dpt and INFN viale Berti Pichat 6/2 40127 BOLOGNA Mobile: +39 393 0086704 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: qemu and barebox 2018-07-18 18:50 ` Giuseppe Levi @ 2018-07-18 19:53 ` Andrey Smirnov 2018-07-18 20:39 ` Alessandro Rubini 1 sibling, 0 replies; 6+ messages in thread From: Andrey Smirnov @ 2018-07-18 19:53 UTC (permalink / raw) To: giuseppe.levi; +Cc: Barebox List On Wed, Jul 18, 2018 at 11:51 AM Giuseppe Levi <giuseppe.levi@gmail.com> wrote: > > Ok tried with CROSS_COMPILE=arm-linux-gnueabi- this should be 32bit arm > then: qemu-system-arm -m 256M -machine virt -display none -serial > stdio -kernel barebox > > hangs..... any idea ? Should I use a different machine ? > NOTE: All of the below pertains to upstream QEMU You are running QEMU emulating "mach-virt", which is a special generic ARM machine in QEMU against a Barebox built for AT91. Last time I checked former can only be configured to have Cortex-A15 (ARMv7), A53 or A57(ARMv8) as a CPU, whereas the latter is ARM9 (ARMv5), not to mention that memory map layout for all of the peripherals _and_ type of IP blocks used is very different. Unless I am getting something very wrong, I'd be very much surprised if it actually worked for you. As for using a different machine, I don't think that would help. AFAIK, what you are trying to do is not currently supported. > It would be very complex to create a White Rabbit virtual machine ? > (HW description is open) Not sure if I'd say it would be "complex", but time consuming for sure. It took me a couple of weeks of work to add enough i.MX7 support to QEMU for it would be able to boot stock Linux and I had a headstart because QEMU already supported i.MX6 when I started. I haven't looked at QEMU tree for probably 4 months, so my knowledge is a bit outdated, but AFAIK, while ARM9 CPU emulation is availible, there's no AT91 SoC specific IP blocks emulation that it supports. So, at a bare minimum, just to see some serial in QEMU, you are looking at implementing your AT91 machine with its memory map, UART IP block emulation plus any peripherals that have to be emulated to "fool" Barebox into booting. Thanks, Andrey Smirnov _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: qemu and barebox 2018-07-18 18:50 ` Giuseppe Levi 2018-07-18 19:53 ` Andrey Smirnov @ 2018-07-18 20:39 ` Alessandro Rubini 1 sibling, 0 replies; 6+ messages in thread From: Alessandro Rubini @ 2018-07-18 20:39 UTC (permalink / raw) To: andrew.smirnov; +Cc: barebox, giuseppe.levi > Not sure if I'd say it would be "complex", but time consuming for > sure. Yes. > but AFAIK, while ARM9 CPU emulation is availible, there's no AT91 SoC > specific IP blocks emulation that it supports. I think the fastest way to work out this setup is building barebox for versatile and using "qemu -M versatilepb". The WR kernel includes drivers for the special ethernet device, but the WR port of barebox has no serious hardware dependencies (it's just uart, flash and i2c eeprom). So IMHO there's no need for AT91 SOC emulation to test different boot procedures. /alessandro _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-07-18 20:40 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2018-07-18 13:02 qemu and barebox Giuseppe Levi 2018-07-18 13:44 ` Roland Hieber 2018-07-18 14:03 ` Alessandro Rubini 2018-07-18 18:50 ` Giuseppe Levi 2018-07-18 19:53 ` Andrey Smirnov 2018-07-18 20:39 ` Alessandro Rubini
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox