Problems booting exynos5420 with >1 CPU
Tushar Behera
trblinux at gmail.com
Thu Jun 5 21:38:12 PDT 2014
On 06/06/2014 06:38 AM, Doug Anderson wrote:
> Hi,
>
> When I try to boot linuxnext on my exynos5420-peach-pit chromebook I
> have problems bringing up extra CPUs:
>
> 1. They don't come up
>
[ ... ]
> [ 1.125030] CPU1: failed to boot: -38
> [ 2.130043] CPU2: failed to boot: -38
> [ 3.135059] CPU3: failed to boot: -38
>
With following config modifications over exynos_defconfig, I can see 4
big cores coming up.
CONFIG_MCPM=y
CONFIG_EXYNOS5420_MCPM=y
[ 0.030919] Exynos MCPM support installed
[ 0.060233] CPU1: Booted secondary processor
[ 0.090006] CPU1: update cpu_power 1535
[ 0.090010] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[ 0.100234] CPU2: Booted secondary processor
[ 0.130007] CPU2: update cpu_power 1535
[ 0.130011] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[ 0.140233] CPU3: Booted secondary processor
[ 0.170008] CPU3: update cpu_power 1535
[ 0.170012] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
--
Tushar Behera
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