Is there a written spec or description of how a boot program (u-boot, UEFI,
hypervisor) boots an OS on ARM platforms?
ePAPR-type device trees are used to describe a platform, but what
about the type of information in sections 5.3, 5.4 and 5.5 of the ePAPR:
-initial mapped areas
-state of MMU at the point the boot program transfers
control to the OS, initial MMU mappings
-initial state of registers
-mechanisms to start secondary CPUs-- e.g. spin table
Besides reading code is this stuff written down anywhere? ...for both ARM v7
and ARM v8.
Thanks,
Stuart Yoder
On 07/19/2013 08:39 PM, Rajiv Nishtala wrote:
> Hi,
>
> My name is Rajiv Nishtala and I am PhD student at UPC, Barcelona.
>
> I am trying to run some benchmarks on the arndale board and measure the
> power reading from it.
>
> is there a way to measure the power from the board directly, I tried using
> the wattsup .net meter and was not successful.
>
> At the moment, I am trying to use 32 system configuration registers,
> sys_cfs to measure the power, but the method seems to be very difficult for
> me. Would you suggest using any other technique?
>
> From the /sys/ folder, i found the following:
>
> /sys/devices/voltage-regulator.5/regulator/regulator.1
>
> more uevent
> OF_NAME=voltage-regulator
> OF_FULLNAME=/voltage-regulator
> OF_COMPATIBLE_0=regulator-fixed
> OF_COMPATIBLE_N=1
>
> But i am not sure what voltage it is referring to. Could you please shed
> some light here.
>
> Thanks.
> Rajiv Nishtala
>
>
I haven't worked much on power measurement on Arndale, but there are
others in Linaro who are actively using Arndale board for various power
management activities. Ccing the linaro developers' mailing list where
you can get some interesting information.
--
Tushar Behera
Hello,
Not much has happened in the area since the Linaro Connect Europe 2013
(Dublin) as the majority of the team is having vacation the first week
after the Connect to recover properly.
Because of that the next big.LITTLE report will be sent on Friday, 26
July 2013 (next week).
--
Best Regards,
Serge Broslavsky <serge.broslavsky(a)linaro.org>
Project Manager, Linaro
M: +37129426328 IRC: ototo Skype: serge.broslavsky
http://linaro.org | Open source software for ARM SoCs
Hi All,
Something I've been meaning to do for a long time is synchronise the latest LAVA master images with lava-create-master, and I've now completed this and tidied things up.
The definitive master images can now be found at:
http://images.validation.linaro.org/lava-masters/
I've tidied the directory above this up, so if you were relying on the master images being there, please note the change.
Thanks
Dave
Hi,
I wanted to submit a patch for below mentioned repository.
Repository : git://git.linaro.org/boot/u-boot-linaro-stable.git
I have made this boot-loader to run on Panda-Board Revision B3 which is
going to have ELPIDA LPDDR2-s4 8Gb memory device.
Can you please suggest how can I submit this patch to the repository?
Thanks,
Deep Shah
Hi all,
Some time ago, we deployed 5 WiFi Access Points in the lab, supporting 802.11a,n,g,b etc. In the office we're having various problems with both the LAB Wifi and the normal office WiFi.
We'd like to perform some tests when we get back from Connect, and were wondering if anyone is performing WiFi tests on any boards, and if so, could we schedule some down time for all the routers? Obviously those tests would need to be halted for the day we pick for testing.
Please let me know about any WiFi tests that are run.
I'll let you know nearer the time, when exactly we'll be taking them offline.
Thanks
Dave
Hi,
With latest Linaro ARM kernel mentioned below fails to boot when
following configs are enabled
CONFIG_VEXPRESS_SPC & CONFIG_ARCH_VEXPRESS_TC2_PM
OR
Even just enabling CONFIG_VEXPRESS_PSCI and passing psci as kernel
bootargs fails
git://git.linaro.org/landing-teams/working/arm/kernel.git
please let me know if you have any information on why it fails?.
Also do I need to update Secure world to make it work with PSCI?
Thanks & Regards
Vijay
