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Custom i.MX6SX board freeze after enabling L310 cache controller

Question asked by Roberto Fichera on Jul 8, 2015
Latest reply on Dec 1, 2015 by Florian GERMAIN

We have developed a new PCB starting from mx6sxsabresd design. It currently passes 12h of calibration test without problem,

so the board design should be ok.

The board boot straight with u-boot-imx and it's able to at least boot the first kernel stage until it stops with some printed garbage, the log is below.

It has a custom DTS slight changed from imx6sx-17x17-arm2.dts.


Any idea how to debug it?



Roberto Fichera.


U-Boot 2014.04-imx_v2014.04_3.14.28_1.0.0_ga+g88123ea (Jul 08 2015 - 17:57:57)


CPU:   Freescale i.MX6SX rev1.2 at 792 MHz

CPU:   Temperature 41 C, calibration data: 0x5ba52269

Reset cause: POR

Board: Domus iMX6SX (ID:e301dab51902b1d4)

I2C:   ready

DRAM:  512 MiB

MAX7322 Not found


*** Warning - bad CRC, using default environment


In:    serial

Out:   serial

Err:   serial

Found PFUZE100! deviceid 0x11, revid 0x21

mmc0 is current device

Net:   Phy not found

PHY reset timed out


Warning: failed to set MAC address


Normal Boot

Hit any key to stop autoboot:  0

=> bdinfo

arch_number = 0x00000000

boot_params = 0x80000100

DRAM bank   = 0x00000000

-> start    = 0x80000000

-> size     = 0x20000000

eth0name    = FEC0

ethaddr     = (not set)

current eth = FEC0

ip_addr     = <NULL>

baudrate    = 115200 bps

TLB addr    = 0x9FFF0000

relocaddr   = 0x9FF66000

reloc off   = 0x18766000

irq_sp      = 0x9DF63EE0

sp start    = 0x9DF63ED0

=> setenv mmcroot /dev/mmcblk3p2 rootwait rw earlyprintk

=> saveenv

Saving Environment to MMC...

Writing to MMC(0)... done

=> boot

mmc0 is current device

mmc0 is current device

reading boot.scr

** Unable to read file boot.scr **

reading zImage

5934672 bytes read in 278 ms (20.4 MiB/s)

Booting from mmc ...

reading domus-reva.dtb

48167 bytes read in 19 ms (2.4 MiB/s)

Kernel image @ 0x80800000 [ 0x000000 - 0x5a8e50 ]

## Flattened Device Tree blob at 83000000

    Booting using the fdt blob at 0x83000000

    Using Device Tree in place at 83000000, end 8300ec26

switch to ldo_bypass mode!


Starting kernel ...


Uncompressing Linux... done, booting the kernel.

Booting Linux on physical CPU 0x0

Linux version 3.14.28-1.0.0_ga+g91cf351 ( (gcc version 4.9.2 (GCC) ) #1 SMP PREEMPT Fri Jul 3 12:43:06 CEST 2015

CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d

CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

Machine model: Voneus i.MX6 SoloX Domus ARM2 Board

bootconsole [earlycon0] enabled

cma: CMA: reserved 320 MiB at 8c000000

Memory policy: Data cache writealloc

PERCPU: Embedded 8 pages/cpu @8bb3a000 s8896 r8192 d15680 u32768

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048

Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk3p2 rootwait rw earlyprintk

PID hash table entries: 2048 (order: 1, 8192 bytes)

Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)

Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)

Memory: 176704K/524288K available (7213K kernel code, 394K rwdata, 6196K rodata, 328K init, 428K bss, 347584K reserved, 0K highmem)

Virtual kernel memory layout:

     vector  : 0xffff0000 - 0xffff1000   (   4 kB)

     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

     vmalloc : 0xa0800000 - 0xff000000   (1512 MB)

     lowmem  : 0x80000000 - 0xa0000000   ( 512 MB)

     pkmap   : 0x7fe00000 - 0x80000000   (   2 MB)

     modules : 0x7f000000 - 0x7fe00000   (  14 MB)

       .text : 0x80008000 - 0x80d20678   (13410 kB)

       .init : 0x80d21000 - 0x80d732c0   ( 329 kB)

       .data : 0x80d74000 - 0x80dd6ac0   ( 395 kB)

        .bss : 0x80dd6acc - 0x80e41d9c   ( 429 kB)

SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

Preemptible hierarchical RCU implementation.

         RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=1.

RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1

NR_IRQS:16 nr_irqs:16 16

L310 cache controller enabled

l2x0: 16 ways, CACHE_ID 0x410000c8, AUX_CTRL 0x32030000, Cache size: 256 kB