19:24 <modwizcode> https://twitter.com/modwizcode/status/1360308258519605254?s=20 I got the AIC emulation working for real finally

19:26 <modwizcode> I'm not very happy with a lot of the code because it seems really inefficient in a lot of places, but that can always be resolved later.

19:27 <modwizcode> I need to get it to present a more complete ADT to get a vanilla build of M1N1 to boot with it though, I've got a fork of M1N1 that works but it's just for testing.

19:27 <j`ey> modwizcode: lotsa penguins

19:28 <modwizcode> Yes indeed :)

19:28 <modwizcode> If marcan gets the big.LITTLE thing working it should show up correctly too (hopefully anyway) since they're exposed with the correct IDs and everything

19:29 <modwizcode> It's fun to see the IPIs firing as I do stuff. You can see that linux assigns the IRQs for the serial port to go to cpu0, then when you type a character you see an IPI fire from cpu0 to another core for each character

19:31 <maximus64> nice :p

19:33 <maximus64> I guess next is DART and PCIE?

19:36 <modwizcode> Eventually yes

19:36 <modwizcode> Have to wait for more hardware docs I think though.

19:37 <modwizcode> But at this point I expect a lot of overlap with existing peripherals (at least higher level ones), like I'm hoping I can reuse the NVMe peripheral code

19:38 <modwizcode> Theoretically because Linux has drivers for a ton of stuff at this point you can just plug in whatever you want on the QEMU side and then tell linux about it via device tree, but that's not my goal since that isn't a true emulation of an M1 mac and it would be useless for running something like macOS

19:42 <maximus64> Good progress tho. If it close enought to the actual HW, it might able to boot the M1 OSX ;)

19:50 <modwizcode> That's the goal eventually. I think it's key to understanding the hardware to have a parallel functional implementation based on that understanding. If the drivers + emulation != results that are expected, it means somewhere something is wrong.

19:51 <modwizcode> A lot of stuff will need to be understood better though. The M1 cpu cores have features that are not documented at all, and macOS certainly will use them.

19:51 <j`ey> as long as you're running qemu on macOS right?

19:51 <modwizcode> That's the other issue

19:51 <modwizcode> I can't do that testing myself because I don't have a mac of my own to legally do that with

19:51 <modwizcode> Luckily other people do and it's not too hard to compile and test so in the future that will not be a problem

19:53 <modwizcode> One thing I'm actually planning to do at some point here is compile the open source release of Xnu and throw it at the emulator. From what I understand there's few to no drivers in that source though, but I think there's Darwin port projects that might be able to supply some basic drivers (or I could probably write my own for serial port at least)

19:54 <j`ey> that doesn't help with understanding the hardware, but a good thing to try ofc

19:54 <j`ey> (well non-cpu hardware)

19:56 <modwizcode> Yeah there is some stuff that I think is there for startup that might expose little differences. Parsing through the code is difficult with how spreadout it is, it actually is sometimes a lot better to throw it at the emulator and look for failures

21:06 <sven> looks like my most expensive part adapter works fine. and the chainload.py development workflow is a lot of fun as well https://files.svenpeter.dev/74fb88486def919c44ead01848a85b84a70159facf2fdc34024cd8b071f0dd5d_m1n1_framebuffer_console.png :)

21:07 <sven> *uart adapter

21:10 <roxfan> can you make it more burry?

21:11 <sven> yeah, I need to convert a better font. and this hdmi capture thing isn't all that great either.

21:12 <roxfan> https://dtinth.github.io/comic-mono-font/ here's a good one

21:18 <sven> looks like it's mostly the capture card

21:19 <sven> that font does look a lot nicer though, thanks!

21:19 <maximus64> oh you already got FB console done lol I was working on that part as well

21:20 <sven> heh

21:20 <sven> just wrote it in the past two hours or so :)

21:21 <maximus64> yea that why I pick that one. Easy and something I know how to do :p

21:21 <sven> didn't want to duplicate any work, just wanted to get my hands dirty

21:21 <sven> exactly :)

21:21 <sven> you can review my code if you want to though

21:22 <maximus64> yea I can take a look :)

21:22 <sven> https://files.svenpeter.dev/34ff92fcac5996e1d2aaf925dca781e1a1907776aea910113ce5d372f187a768_m1n1_fbconsole.png looks a lot nicer on a tv

21:22 <davidrysk[m]> is there a good way to browse lkml archives?

21:24 <maximus64> I have a macbook that I can try on

21:25 <sven> sure, let me just clean this up a little bit and I'll push it

21:30 <sven> maximus64: https://github.com/AsahiLinux/m1n1/pull/25

21:30 <sven> first draft, still needs some cleanup :)

21:31 <maximus64> I just using my hack up GoodFET that only have FT232R and some logic buffer for 1.2 logic

21:31 <maximus64> Thanks :)

21:32 <sven> I use a m1 MacBook Air and a m1 Mac mini connected with a usb-c cable and marcan's macvdmtool

21:32 <sven> this makes for a really nice development workflow

21:32 <maximus64> lol

21:32 <maximus64> very expensive adapter lol

21:32 <sven> yeah :P

21:33 <sven> but totally worth it

21:33 <sven> maximus64: I think you need to run makefont.sh once fwiw

21:33 <sven> that still needs fixing

21:34 <j`ey> davidrysk[m]: lore.kernel.org?

21:34 <maximus64> ah ok

22:09 <maximus64> sven: this is how it look on my macbook air: https://imgur.com/djiJ7Jw

22:09 <maximus64> font is bit hard to read imo

22:09 <maximus64> but it work :p

22:10 <sven> nice :)

22:10 <sven> yeah, might be a good idea to increase the font size a little bit

22:14 <maximus64> hmm there is some weird bug that I can't no longer load linux

22:14 <sven> uh oh :D

22:14 <sven> how did I manage to break that?

22:15 <maximus64> not sure probably bug that already there. Let me get the log

22:17 <maximus64> https://termbin.com/7q6a

22:17 <sven> huh, weird

22:18 <maximus64> this is chainload another m1n1 and then try to boot linux

22:18 <maximus64> let me build m1n1 from main and retest

22:18 <sven> strange, start_secondaries also seems to fail for me

22:20 <maximus64> work find with main build after chainload

22:21 <sven> ugh, so, the secondary cores call printf so there might be a race somewhere.

22:21 <maximus64> lol yea

22:23 <sven> yeah, it's definitely some race

22:24 <sven> removing all printfs from the secondaries seems to fix it

22:24 <sven> I'll take a look tomorrow, too tired right now for that ;)

22:25 <maximus64> good nite :)

22:26 <maximus64> assuming it night time for you heh

22:26 <sven> yeah, half an hour to midnight ;)

22:26 <sven> good night!