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IMX6 Quad only 2 cpus are running- Board: IMX6-SabreSD

Question asked by kalyan kodamagula on Jul 4, 2017
Latest reply on Jul 4, 2017 by Carlos_Musich

Hello,

 

We have a customized IMX6 Quad board, Part number : MCIMX6Q6AVT08AD. We are not able to bring up all

the 4 cpus.Details are below.

 

root@ota-p112-b1:~# dmesg | grep cpu

[    0.000000] Initializing cgroup subsys cpu

[    0.000000] Initializing cgroup subsys cpuacct

[    0.000000] PERCPU: Embedded 12 pages/cpu @ee921000 s17088 r8192 d23872 u49152

[    0.000000] pcpu-alloc: s17088 r8192 d23872 u49152 alloc=12*4096

[    0.000000] pcpu-alloc: [0] 0 [0] 1

[    0.000000] Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk0p8 ro rootwait rootfstype=ext4 no_console_suspend=1 consoleblank=0 init=/sbin/init log_buf_len=1M mem=2047M loglevel=8 lpj=30000 oops=panic panic=1 maxcpus=4 ramoops.mem_address=0x8FF00000 ramoops.mem_size=1048576

[    0.000000]  RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.

[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2

[    0.032133] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000

[    0.090222] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001

[    0.159578] cpuidle: using governor ladder

[    0.189573] cpuidle: using governor menu

 

 

 

 

root@ota-p112-b1:~# cat /proc/cpuinfo
processor : 0
model name : ARMv7 Processor rev 10 (v7l)
BogoMIPS : 6.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpd32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x2
CPU part : 0xc09
CPU revision : 10

processor : 1
model name : ARMv7 Processor rev 10 (v7l)
BogoMIPS : 6.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpd32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x2
CPU part : 0xc09
CPU revision : 10

Hardware : Freescale i.MX6 Quad/DualLite (Device Tree)
Revision : 0000
Serial : 0000000000000000

 

 

OCOTP Address for NUM_CORES[1:0] { bit 20 and 21 }

root@ota-p112-b1:~# devmem 0x021BC430
0x20020013

 

From above.Hardware support shows ok.

 

 

Please help to find the possible solution for this issue.

 

-Thanks,

kalyan.

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