On Thu, Jun 12, 2014 at 10:18 PM, jonsm...@gmail.com <jonsm...@gmail.com> wrote:
> Any ideas why the second CPU isn't booting?
>
> root@linaro-developer:/etc# dmesg | grep -i CPU
> [    0.000000] Booting Linux on physical CPU 0x0
> [    0.000000] Initializing cgroup subsys cpuset
> [    0.000000] Initializing cgroup subsys cpu
> [    0.000000] Initializing cgroup subsys cpuacct
> [    0.000000] CPU: ARMv7 Processor [410fc074] revision 4 (ARMv7), cr=10c5387d
> [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> instruction cache
> [    0.000000] PERCPU: Embedded 9 pages/cpu @ee7cc000 s12736 r8192 d15936 
> u36864
> [    0.000000] pcpu-alloc: s12736 r8192 d15936 u36864 alloc=9*4096
> [    0.000000] pcpu-alloc: [0] 0 [0] 1
> [    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
> [    0.002235] CPU: Testing write buffer coherency: ok
> [    0.031818] /cpus/cpu@0 missing clock-frequency property
> [    0.031846] /cpus/cpu@1 missing clock-frequency property
> [    0.031858] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
> [    0.038881] CPU1: failed to boot: -38
> [    0.038926] Brought up 1 CPUs
> [    0.038941] CPU: All CPU(s) started in SVC mode.
> [    1.631337] ThumbEE CPU extension supported.
> [   15.298527] CPU1: failed to boot: -38
> root@linaro-developer:/etc#

A20 SMP is enabled using PSCI. You'll need a u-boot branch with PSCI support.

Hans' sunxi-devel does:
https://github.com/jwrdegoede/u-boot-sunxi/tree/sunxi-next

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