[9fans] DigiLand DL701Q quad core tablet

[9fans] DigiLand DL701Q quad core tablet

[cigar562hfsp952fans]

Does anybody know if Plan 9 can run on a DigiLand DL701Q quad core
tablet?  Details here:

  http://www.digi-land.net/Photo_Show.asp?InfoId=487&ClassId=56&Topid=53

In short, it's an Arm Cortex A7 with 512MB DDR3, 8GB NAND flash, 7"
touchscreen, uSD, uUSB AB (OTG), Bluetooth, GPS, and 802.11b/g/n.

Re: [9fans] DigiLand DL701Q quad core tablet

[erik quanstrom]

On Sat Nov 15 11:48:01 EST 2014, cigar562hfsp952fans@icebubble.org wrote:
> Does anybody know if Plan 9 can run on a DigiLand DL701Q quad core
> tablet?  Details here:
>
>   http://www.digi-land.net/Photo_Show.asp?InfoId=487&ClassId=56&Topid=53
>
> In short, it's an Arm Cortex A7 with 512MB DDR3, 8GB NAND flash, 7"
> touchscreen, uSD, uUSB AB (OTG), Bluetooth, GPS, and 802.11b/g/n.

this will require a new kernel, and dealing with some new devices.  sounds interesting, though.

- erik

Re: [9fans] DigiLand DL701Q quad core tablet

[cigar562hfsp952fans]

erik quanstrom <quanstro@quanstro.net> writes:

>> In short, it's an Arm Cortex A7 with 512MB DDR3, 8GB NAND flash, 7"
>> touchscreen, uSD, uUSB AB (OTG), Bluetooth, GPS, and 802.11b/g/n.
>
> this will require a new kernel, and dealing with some new devices.  sounds interesting, though.

Yes, I figured it might require some new device drivers, but why would
it require a new kernel?  I thought there was already a Plan 9 kernel
for Arm Cortex-series processors.  That's one of the reasons why I
developed such a crush on OMAP.  ;)

Re: [9fans] DigiLand DL701Q quad core tablet

[cigar562hfsp952fans]

cigar562hfsp952fans@icebubble.org writes:

> Yes, I figured it might require some new device drivers, but why would
> it require a new kernel?  I thought there was already a Plan 9 kernel
> for Arm Cortex-series processors.  That's one of the reasons why I
> developed such a crush on OMAP.  ;)

BTW, that was not intended as a rhetorical question; I really am curious
why the device would require a whole new kernel...

Re: [9fans] DigiLand DL701Q quad core tablet

[Charles Forsyth]

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On Thu, Dec 18, 2014 at 8:06 PM, <cigar562hfsp952fans@icebubble.org> wrote:
>
> would require a whole new kernel...


when we say "new kernel" we mean "new configuration and drivers, and
possibly platform-specific bits"
not a complete rewrite.

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Re: [9fans] DigiLand DL701Q quad core tablet

[da Tyga]

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Plan9 kernel is monolithic with the drivers required for a specific
platform compiled in.

So you might need to write specific drivers for new hardware if they are
not already available.

The paper:  http://plan9.bell-labs.com/wiki/plan9/compiling_kernels/ explains
the steps required to generate a new kernel.  BTW, even for the same
hardware, the kernels are different for terminals, cpu servers, etc.


On 19 December 2014 at 07:06, <cigar562hfsp952fans@icebubble.org> wrote:
>
> cigar562hfsp952fans@icebubble.org writes:
>
> > Yes, I figured it might require some new device drivers, but why would
> > it require a new kernel?  I thought there was already a Plan 9 kernel
> > for Arm Cortex-series processors.  That's one of the reasons why I
> > developed such a crush on OMAP.  ;)
>
> BTW, that was not intended as a rhetorical question; I really am curious
> why the device would require a whole new kernel...
>
>

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Re: [9fans] DigiLand DL701Q quad core tablet

[Quintile]

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well,
kernel binaries are different for terminals and cpu servers, but these are built from the same source code.

in reality the kernel is the same modulo some drivers and one variable ( e.g. no vga in cpu servers).

-Steve






> On 19 Dec 2014, at 03:15, da Tyga <cyberfonic@gmail.com> wrote:
> 
> Plan9 kernel is monolithic with the drivers required for a specific platform compiled in.  
> 
> So you might need to write specific drivers for new hardware if they are not already available.
> 
> The paper:  http://plan9.bell-labs.com/wiki/plan9/compiling_kernels/ explains the steps required to generate a new kernel.  BTW, even for the same hardware, the kernels are different for terminals, cpu servers, etc.
> 
> 
>> On 19 December 2014 at 07:06, <cigar562hfsp952fans@icebubble.org> wrote:
>> cigar562hfsp952fans@icebubble.org writes:
>> 
>> > Yes, I figured it might require some new device drivers, but why would
>> > it require a new kernel?  I thought there was already a Plan 9 kernel
>> > for Arm Cortex-series processors.  That's one of the reasons why I
>> > developed such a crush on OMAP.  ;)
>> 
>> BTW, that was not intended as a rhetorical question; I really am curious
>> why the device would require a whole new kernel...

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Re: [9fans] DigiLand DL701Q quad core tablet

[Richard Miller]

> in reality the kernel is the same modulo some drivers and one variable ( e.g. no vga in cpu servers).

It's actually quite easy to make a single binary which can be configured
at boot time to be either cpu or terminal, depending on a plan9.ini variable.
IIRC it's a few lines of code in each of boot.c and main.c.

However I can imagine a scenario in which this would be a security hole.

Re: [9fans] DigiLand DL701Q quad core tablet

[Iruatã Souza]

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Em 19/12/2014 06:35, "Richard Miller" <9fans@hamnavoe.com> escreveu:
>
> > in reality the kernel is the same modulo some drivers and one variable
( e.g. no vga in cpu servers).
>
> It's actually quite easy to make a single binary which can be configured
> at boot time to be either cpu or terminal, depending on a plan9.ini
variable.

9front does that.

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