Hi,
On 12/31/2013 12:11 PM, Tim Fletcher wrote:
On 31/12/13 09:39, Hans de Goede wrote:
Hi,
On 12/30/2013 07:51 PM, Tim Fletcher wrote:
On 22/12/13 12:57, Hans de Goede wrote:
Hi,
On 12/22/2013 12:21 AM, Michal Suchanek wrote:
Actually sun7i smp conflicts badly with the sun6i smp .. so a stab at
a merge:
https://github.com/hramrach/linux-sunxi/commits/sunxi-next
Compile tested.
Actually the plan for A20 going forward is to have u-boot implement
PSCI and use that, the problem of the parent post is likely that he does
not
have CONFIG_ARM_PSCI=y in his kernels .config. The reason for this is
that
this is necessary to properly enable HYP mode on the cpu-cores, which we
want to be able to do hardware virtualization.
WRT I'm a bit surprised that Maxime does have SMP support for A31 in his
tree
to get merged upstream, as the A31 should be the same story, it has
Cortex
A7 cores which can do HYP mode too.
I've been testing this on my Cubietruck and your current devel tree
seems to be missing the dts changes from this commit.
https://github.com/hramrach/linux-sunxi/commit/8b5c1d5e7bbd71cf36535dc11578d9387af003b0
If I boot an rc5 kernel with a dtb from rc5 then I get usb but only 1
CPU (other fails to boot error -38), it I boot with a dtb from rc3 I
get both cpus but no USB.
If I apply the linked patch then I get both CPUs and USB.
Looking at you sunxi-next branch:
https://github.com/hramrach/linux-sunxi/commits/sunxi-next
You're not only adding "Add cpuconfig nodes in dts for smp configure."
but also
"Add smp support for Allwinner A20(sunxi 7i)."
This is the old way of doing smp on A20, we now have a u-boot with
PSCI, which is the preferred way of doing smp since it also give
us HYP mode, which many people want.
The proper way to get smp now is to use this u-boot:
https://github.com/jwrdegoede/u-boot-sunxi/commits/sunxi-next
Second try with coffee...
I am using your u-boot patched, with current sunxi-devel branch kernel+dtb then
only 1 CPU boots. If I apply just the changes I linked to the dts file and
rebuild it then both CPUs boot with the same kernel binary.
I use your current u-boot and the rc5 kernel and just drop in the dtb built
from rc3 sunxi-next sources then both cpus boot but USB doesn't work.
I have not applied any the kernel code changes, in fact all I did was make
dtbs, copy the new dtb file over and reboot.
Weird it works fine for me, and having that dtb change fix things makes no
sense since
if you did not apply the patch in question nothing in the kernel will be
responding
to that dtb blurb.
Are you sure you are booting the uImage you think you are booting?
What commands are you using to boot the kernel ? I'm using this:
env set fdt_high ffffffff
ext2load mmc 0 0x46000000 uImage.new
ext2load mmc 0 0x49000000 dtb
setenv bootargs console=ttyS0,115200 root=/dev/mmcblk0p3 ro rootwait loglevel=5
bootm 0x46000000 - 0x49000000
Regards,
Hans
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