Pavel Pisa
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Pavel Pisa
ppisa
Edited 1 year ago
Our #riscv and computer architectures course materials and videos updated https://cw.fel.cvut.cz/wiki/courses/b35apo/en/lectures/start (switch to LaTeX, slides sources available). New online #riscv assembly and low level C-language tasks online evaluation, training site added https://eval.comparch.edu.cvut.cz/ as companion to our #qtrvsim online and native educational simulator https://github.com/cvut/qtrvsim
If you are interested in materials or want to see our hardware ZOO, stop at #osadl booth (in hall 4, booth 4-168) at #embeddedworld #ew24 . OSADL https://www.osadl.org/ has been kind to provide us space there on our academic membership base. We will have GNU/Linux, RTEMS, NuttX ARM and RISC-V HW running there.
If you are interested in materials or want to see our hardware ZOO, stop at #osadl booth (in hall 4, booth 4-168) at #embeddedworld #ew24 . OSADL https://www.osadl.org/ has been kind to provide us space there on our academic membership base. We will have GNU/Linux, RTEMS, NuttX ARM and RISC-V HW running there.
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Pavel Pisa
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Linus Torvalds
torvaldsSome of you know today as π-day.
But the real insiders know that today is the 30th anniversary of the 1.0 release of Linux.
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Jakub Jirutka 🇪🇺🇺🇦
jakub@social.jirutka.czRally in support of #Ukraine on Old Town Square in #Prague was huge! The square was completely packed.
#StandForUkraine #SlavaUkraini #RussiaIsATerroristState
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Pavel Pisa
ppisa
Edited 1 year ago
QtRvSim version 0.9.6 released. The #qtrvsim is educational #riscv simulator with pipeline and cache visualization. Version 0.9.6 adds support of M-mode ecalls, ACLINT MTIMER, MSWI, SSWI, related CSR registers, serial port Rx and Tx interrupts and more. See notes on the release page https://github.com/cvut/qtrvsim/releases/tag/v0.9.6 . Online version and related courses materials are available at https://comparch.edu.cvut.cz/ . It provides enough to run, port or implement a simple (no memory protection or paging; M-mode only) operating system with preemptive multitasking.
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Drew Fustini
pdp7@mastodon.socialplaylist of the RISC-V Summit 2023 videos from earlier this month
https://www.youtube.com/playlist?list=PL85jopFZCnbMfMRR25ENcRkhhAUGwP5C5 #riscv
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Pavel Pisa
ppisa
I have found a little more information about Raptor Computing and Solid Silicon cooperation on a OpenPOWER based Power10 class system plans there
https://www.talospace.com/2023/10/the-next-raptor-openpower-systems-are.html
https://www.talospace.com/2023/10/the-next-raptor-openpower-systems-are.html
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Pavel Pisa
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OSNews
osnews@mstdn.socialRaptor Computing working on new POWER systems using OpenPOWER CPU from Solid Silicon
Well, this is a pleasant surprise and a massive coincidence.
Besides that BMC-focused press release, Raptor Computing Systems tweeted out that they are working on "next generation of high performance, fully owner controlled systems! Built using the open POWER ISA
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Pavel Pisa
ppisa
Booth presenting open technologies at #LinuxDays 2023. uLAN project https://ulan.sourceforge.net/ used in PiKRON's instruments, agriculture and even in home automation prototype at CTU, full presentation of its 30-years in use https://ulan.sourceforge.net/pdf/ulan-linuxdays23-slides.pdf . The #QtRvSim, RISC-V simulator has been presented as well. #pysimCoder generated code controls motor on #MZ_APO educational kit designed for CTU courses. Open motion base board for Teensy-4.1 is on the right, same as #VisionFive2. See more about related activities at Open Technologies Research Education and Exchange Services (unofficial CTU FEE group) pages https://gitlab.fel.cvut.cz/otrees/org/-/wikis/knowbase
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Pro zájemce přidávám odkaz na moje shrnutí vývoje otevřených technologií a software přednesené na #LinuxDays 2023 https://youtu.be/WJvBghM5lnU (Jak to bylo pohádko, když přišlo na svět GNUňátko?). Materiály k prezentace jsou k dispozici na https://pretalx.linuxdays.cz/linuxdays-2023/talk/WTNNLG/
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@jarkko I am not sure if next use of image files from host system could be robust (for example in respect to aligning image according to used virtual device sector sizes etc.). But for basic use I would use fdisk, gdisk, parted, ... for partitioning. mkfs.ext2, mkfs.vfat have offset option to setup filesystem at right location and fs-size or block_count argument to not span it to the end of image. BTRFS seems to be without these options, for example. Then there is option to format individual partitions images and concatenate them together. When feed trough dd conv=notrunc,sparse,nocreat even sparse image can be obtained. I have put my idea into google and got to link https://unix.stackexchange.com/questions/281589/how-to-run-mkfs-on-file-image-partitions-without-mounting . Problem is creation of the FS content in some cases. If it is possible to have root read only or with overlay then genromfs or sqush can be used to prepare partition content even with files...
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Pavel Pisa
ppisa
Edited 1 year ago
#qtrvsim educational simulator compiled and running on real #riscv. #visionfive2 provided from RISCV.org developer boards program just arrived today so native build and run of https://github.com/cvut/qtrvsim was tempting.
Simulator can be used with internal assembler or can run simple RV32IM and RV64IM static ELF binaries including even 7 Linux kernel system calls. Packages are provided for x86 and ARM GNU/Linux, Windows, Mac and browser version is available too https://comparch.edu.cvut.cz/ but running it on architecture which it supports and is used for teaching is pleasant step forward.
Simulator can be used with internal assembler or can run simple RV32IM and RV64IM static ELF binaries including even 7 Linux kernel system calls. Packages are provided for x86 and ARM GNU/Linux, Windows, Mac and browser version is available too https://comparch.edu.cvut.cz/ but running it on architecture which it supports and is used for teaching is pleasant step forward.
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Page with presentation and recording pointers https://fosdem.org/2023/schedule/event/rv_qtrvsim/
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Pavel Pisa
ppisa
Edited 1 year ago
The recording of our 30 years in #CANBUS support presented at #devconf_cz is available
https://youtu.be/RwmQYjfzQAg
related open source drivers, kernel support, designs, latency testing etc.. at https://canbus.pages.fel.cvut.cz/
https://youtu.be/RwmQYjfzQAg
related open source drivers, kernel support, designs, latency testing etc.. at https://canbus.pages.fel.cvut.cz/
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Pavel Pisa
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Pavel Pisa
ppisa
In person meeting/discussion about computer architectures teaching at Brno DevConf https://sched.co/1MYo9 . We bring our QtRvSim and QtMip simulators and teaching materials to share, exchange with others comparch.edu.cvut.cz/ and are curious to see, learn what others use.
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Pavel Pisa
ppisa
Edited 1 year ago
CAN Bus in Control, Automotive and Satellitelites at Brno DevConf https://sched.co/1MYjG more. Daily kernel build latency testing at https://canbus.pages.fel.cvut.cz/can-latester/ more about used CTU CAN FD #CANBUS controller and other projects at https://canbus.pages.fel.cvut.cz/
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