Migrated to bugzilla: https://bugs.linaro.org/show_bug.cgi?id=550
** Bug watch added: Linaro Bug Tracking System #550
https://bugs.linaro.org/show_bug.cgi?id=550
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** Changed in: u-boot-linaro
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/707047
Title:
Only half of RAM useable when using Device Tree on Panda board
To manage
** Branch linked: lp:ubuntu/precise/u-boot-linaro
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Title:
Only half of RAM useable when using Device Tree on Panda board
To manage notifications
** Changed in: linaro-ubuntu
Assignee: (unassigned) => John Rigby (jcrigby)
** Changed in: linaro-ubuntu
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/707
** Also affects: linaro-ubuntu
Importance: Undecided
Status: New
** Also affects: u-boot-linaro
Importance: Undecided
Status: New
** Changed in: linaro-ubuntu
Status: New => Confirmed
** Changed in: linaro-ubuntu
Importance: Undecided => High
** Changed in: linaro-
The u-boot fdt_highmem change has been taken into the upstream pool.
After some discussion it seems agreed an additional change is desired to
also allow u-boot to auto-relocate fdt and initrd data to a new (lowmem)
location for booting. That change will be independent of this one.
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A fix for this is currently being reviewed. It involves changes to both
u-boot and linaro-media-create. When in place we can remove the
disabling of the last 1/4GB from our Panda .dts file.
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Still an issue with 11.06 release candidate, testing with pandaboard A1
and developer image.
Linux version 2.6.38-1003-linaro-omap (buildd@adoxaceae) (gcc version
4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4) ) #4~ppa5-Ubuntu SMP PREEMPT Wed
May 25 14:44:32 UTC 2011 (Ubuntu 2.6.38-1003.4~ppa5-linaro-omap
2
Hmmm, I had hoped that would not be a limitation with Rob Herrings patch
to allow DTB/ATAGs to be mapped during early setup. I guess we need to
force u-boot to keep things lower. I believe the easy fix is to define
CONFIG_SYS_BOOTMAPSZ to be something like 512MB in u-boot.
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With DT present I see the regions described in the .dtb file being
properly excluded. So now the problem is that just under 3/4 of
available RAM is visible, when we should be able to see all except the
48MB set aside just below the 1/2G boundary (which is used by other
processor(s) on the SoC).
T
Without looking at both DT and non-DT boot logs, I suspect the problem
is that U-Boot is only reporting 512MB of ram, and stuffing that amount
into the /memory node in the DT. It looks like in the non-DT use case,
the kernel command line is being used to manually set the RAM layout,
probably so th
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