#linux-sunxi on 2018-12-07 — irc logs at freenode.irclog.whitequark.org

2018-08-03 10:18 rellla changed the topic of #linux-sunxi to: Allwinner/sunxi /development discussion - did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait! - https://github.com/linux-sunxi/ - Logs at http://irclog.whitequark.org/linux-sunxi - *only registered users can talk*

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00:34 <catphish> my arm manual is making me murderous https://i.imgur.com/HoZ3lU0.png

00:37 <catphish> the register is indeed in the insane place the manual claims :)

00:38 <KotCzarny> so, as long it's correct and documented, what is the problem?

00:39 <catphish> no problem, i suppose, apart from the other minor documentation error

00:39 <KotCzarny> which describes 'reserved' region, ie. unused probably

00:39 <catphish> correct

00:40 <catphish> it's just got the wrong offset

00:40 <catphish> confused me for a while

00:40 <KotCzarny> probably tickling different part of the chip

00:41 <KotCzarny> and i should be sleeping for 2hours already, night!

00:41 <catphish> yeah i'm sure there's a good reason for that large gap

00:42 <catphish> 0x00ed must be an error though

00:42 <KotCzarny> erectile dysfunction? :P

00:42 <catphish> lool

00:43 <catphish> on the whole, this documentation is pretty good, never really read arm docs in this depth before

00:43 <catphish> but it's heavy going

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01:59 <tautologico> catphish: is it the arm arm?

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02:07 <catphish> ywha?

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02:45 <tautologico> catphish: the ARM Architecture Reference Manual, i.e. the ARMARM :)

02:47 <wens> ARM docs are pretty good, though stuff is a bit scattered

02:51 <catphish> tautologico: ah, that's certainly one of the documents i have open :)

02:51 <catphish> things are definitely scattered, every manual only builds on the previous ones

02:53 <catphish> just learning about IRQs, getting there, but right now all i seem to be able to do is crash instead of run my ISR

02:54 <catphish> would probably be easier if i had an emulator or debugger for this sort of thing

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03:04 <tautologico> qemu does emulate some arm architectures

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03:51 <catphish> seemingly not very well :) "qemu-system-arm: Trying to execute code outside RAM or ROM at 0x00008000"

03:59 <tautologico> yeah I haven't had much success with it either, but there are reports of people testing development for raspberry pi using it

04:01 <catphish> i imagine it's set up to do whatever is necessary to run linux rather than necessarily emulating the devices precisely

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04:26 <catphish> yay, fixed my interrupts, u-boot left the vector table remapped somewhere :)

04:26 <catphish> and now i sleep

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04:27 <catphish> such learning

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08:49 <jerbob92> plaes, after wasting a full day on getting fastboot/fell-mass-storage working, we're dd'ing from armbian for now :)

08:50 <jerbob92> But thanks for the pointers, I'll try to get fastboot working after we have our first batch of devices shipped

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13:05 <mru> I wouldn't use qemu for this kind of testing

13:05 <mru> it takes too many shortcuts

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17:29 <catphish> mru: there'a a patch for qemu to fix the sram now :)

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17:30 <catphish> i don't think they've bothered to emulate much of it, probably not very useful, but at least the ram works now

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