sorear changed the topic of #riscv to: RISC-V instruction set architecture | https://riscv.org | Logs: https://libera.irclog.whitequark.org/riscv | Matrix: #riscv:catircservices.org
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<drmpeg> Received my HiFive Premier P550 today.
<drmpeg> Unfortunately I was too busy to set it up.
<paulk> is there any code out yet for the EIC7700X?
<drmpeg> The board comes with the Freedom SDK preloaded.
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<paulk> thanks!
<paulk> I'd be curious to know whether there's free software for boot, especially for dram init
<paulk> looking at https://github.com/sifive/hifive-premier-p550-tools I guess it's probably not the case
<drmpeg> Yeah, dram init is usually just some big file of constants with zero documentation.
<paulk> well static registers list is one thing, but here it seems to be actual software here
<paulk> there's relevant repos at https://github.com/eswincomputing
<drmpeg> SiFive did publish a EIC7700X datasheet. https://www.sifive.com/document-file/eic7700x-datasheet
<paulk> heh interestingly it has a part about DRAM
<paulk> so it's the usual Synopsys uMCTL2, probably with the LPDDR5/4/4X PHY
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<mfny> jbe: is the picture you posted before of the cooler for the Jupiter the Cooler recomended in the cooler thread on the Jupiter forum ?
<jbe> mfny: yeah, looks the same, I got it off aliexpress though. those pics show no thermal pads however
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<jbe> which I guess may be just as well, probably better to apply them yourself anyway
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<Tenkawa> I prefer thermal paste personally although it is a bit messier
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<Tenkawa> I buy it at my local shop.. allows much more refined positioning
<Tenkawa> (and of course to cover all those areas that square/rectangular pads just can't quite reach)
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<cousteau> Hi!
<cousteau> Is V ratified?
<cousteau> Or only parts of it?
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<mfny> jbe: ive ordered some pads, so hoping there ant any pre applied to the cooler as the ones on your cooler are in the wrong place it seems
<mfny> Tenkawa: normaly i use thermal paste, this is my first time using pads,are they sticky on one side usualy or what to mount them or are they just compressed to fit ?
<mfny> jbe: from a reply to my post in the jupiter cooling thread it seems the memory may need a thicker pad then the CPU btw
<kepstin> cousteau: the full V extension version 1.0 is ratified.
<kepstin> mfny: yeah, the m1 package is a lot taller than the ram chip, and the heatsink is off-center.
<kepstin> thermal pads compress a bit, but they're not intended to be significantly compressed.
<mfny> kepstin: couldnt i just stack the pads i have on the way to reach the right height ?(they are 1mm thick pads)
<mfny> or would i have to get an exact height pad or close ..
<kepstin> that's probably fine, i'd bet anything around 1.5-2mm would be close enough.
<mfny> kepstin: ill just do the bodge of stacking them then, i bought a pack of 10 so have plenty
<mfny> kepstin: do you have a Jupiter ?
<kepstin> (kind of annoyed at the rtc battery size; i have lots of cr2032 cells, and they had space on the board for a bigger holder...)
<kepstin> has anyone else run into alignment issues with the pcie slot? i've used this case with a number of pc board that have all worked fine, but with the jupter i can't get any cards to fit; the slot seems like it's about 1mm too close to the back edge of the board.
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<mfny> kepstin: my Jupiter is on the way, should have it next week, also have a case,psu etc on the way to
<mfny> i ordered this case as it was cheap https://www.montechpc.com/en/products_detail.php?nid=227
<mfny> and a Corsair CX550 PSU (no one reputable seems to make PSUs under 500w it seems)
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<kepstin> yeah, any atx power supply is overkill for this thing, and it doesn't even properly turn the psu on/off
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<mfny> i was going to order a tiny mitx case but i wanted the ablity to add a video card for if/when support for that shows up
<mfny> no idea when that will be or even if it will happen as i dont think anyone is working on it anyway afaik
<mfny> but you know just in case...
<kepstin> i'm using an old quirky slim mini-itx case - inwin bp655 - with a 300W seasonic gold efficiency TFX power supply.
<kepstin> in theory i could put in a single slot low profile gpu; there's a few radeon cards that might be suitable.
<mfny> low profile gpu limits buying options for old GPUs that may work with the Jupiter
<kepstin> maybe i'll find a radeon pro WX 4100 or similar at some point, that's basically a low profile rx 560.
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<unlord> Does Jupiter have RVV?
<kepstin> yes, the spacemit x60 cores in the k1/m1 soc support rvv 1.0
<unlord> OK, so these are the same cores I already have?
<unlord> I am looking for more RVV diversity for my tests
<kepstin> i don't know what you have, so i couldn't say? there's not a whole lot of chips around with rvv 1.0 right now :/
<unlord> I have a spacemit and a canaan
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<mfny> so if the cooler i get already has thermal pad on it but in the wrong place how would i deal with that ? remove the existing pad, or just place new pad over existing in the right place or what ?
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<cousteau> kepstin: thanks!
* cousteau is looking for documentation on the RoCC interface - all references seem to point to a document from one C. Yarp that seems to have vanished from the face of the Internet
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<drmpeg> Just powered up the HiFive P550. This is the most verbose sensors dump I've ever seen. https://www.w6rz.net/p550sensors.png
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<drmpeg> The fan is fairly quiet. It changes speed a lot, which is a little annoying.
<mfny> drmpeg: is this a new board you are playing with ?
<drmpeg> Yes.
<mfny> nice
<mfny> i hope to have that new board feeling later next week when my jupiter arrives
<mfny> probibly not nearly as expensive as that Sifive one was for you tho, their boards are kinda pricy
<drmpeg> Yeah, $600. Here's the cpuinfo. https://www.w6rz.net/p550cpuinfo.png
<drmpeg> sv48 is a surprise.
<mfny> the jupiter will be my first riscv board
<drmpeg> Cool. I have a BPI-F3, but I haven't got around to setting it up yet.
<mfny> i looked at the F3 but chose the jupiter as it was mitx so more case choice
<mfny> but honestly not sure i picked the right board for a first timer with the jupiter .. guess ill see next week tho
<drmpeg> Any particular things you want to do, or just curious about RISC-V?
<mfny> just curious
<drmpeg> I was mostly just curious. I had worked with i960 and SPARC, so a new RISC cpu seemed interesting.
<drmpeg> I also worked with a really obscure RISC chip, the C-Cube VideoRISC. https://www.w6rz.net/videorisc.png
<Tenkawa> mps: well I got the VF2 to boot FreeBSD but it has quite a lot of drivers not working yet...
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<mps> Tenkawa: oh, bad news. anyway thank you for info
<Tenkawa> Looks like OpenBSD has much better driver support though
<Tenkawa> I think I might try it next
<Tenkawa> it actually has a nvme native driver already
<mps> nice to hear. I don't have enough free time to try. (a lot of $day_job tasks)
<jrtc27> nvme isn't the problem, it's just the pci controller
<jrtc27> nvme comes for free once you have pci
<jrtc27> (well, assuming you already have a generic nvme driver, which all(?) the bsds do)
<jrtc27> I'd love to see someone port the missing drivers from openbsd for things like that and usb
<Tenkawa> jrtc27: true... but the FreeBSD pcie drivers are ab absolute no show for RV (at least on the JH7110) atm
<mps> I never tried to install FreeBSD
<Tenkawa> They work great on the BCM and RK3588 though
<jrtc27> yes, there's no driver for the vf2's controller (though as usual it's some vendor IP with board-specific glue, so we might have most of the bits there, just missing the glue driver?)
<jrtc27> and work fine on the unmatched too (or with qemu's generic controller), so riscv pcie is fine, it's just the board-specific side
<Tenkawa> Got a PI5 sitting here and a Rock5 and they are humming nicely both.
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<conchuod> jrtc27: there may not be the generic bits either, In linux the only thing sharing the ip /appears/ to be polarfire.
<jrtc27> ah right this is that one, yeah
<jrtc27> then probably we need to import more things from openbsd
<jrtc27> though IIRC isn't it just an ECAM with some special bits to frob?
<conchuod> tbh, I don't know. The one on polarfire has a bunch of weird shit going on cos of design "choices"
<jrtc27> "it's just software, they can adapt"? :)
<conchuod> Something like that.
<conchuod> And it has been a huge problem.
<conchuod> The interrupt handling is kinda funky too, IIRC because there's no msi controller. I don't quite know the overlap between the two SoCs. Polarfire's version of the IP is far older and more limited than what starfive have.
<conchuod> it's plda ip. Or at least, it is plda ip now.
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<la_mettrie> Tenkawa: i've been working with that pcie driver but without previous knowledge on that tech, the progress has been slow. maybe i should have tried to follow openbsd's implementation more closely
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