topic Re: Linux hangs after: print_constraints in i.MX Processors

Linux hangs after: print_constraints

jotes — Mon, 27 May 2013 07:47:59 GMT

Hello everyone!

I have problem with linux kernel on my IMX6Q SABRE SDP. I have built it with LTIB from Freescale. Sometimes (not always!) it hangs right after:

mc_pfuze 1-0008: ID: 0,Full lay: 1 ,Metal lay: 1

mc_pfuze 1-0008: FAB: 0 ,FIN: 0

print_constraints: PFUZE100_SW1A: 300 <--> 1875 mV at 1300 mV

print_constraints: PFUZE100_SW1B: 300 <--> 1875 mV at 300 mV

print_constraints: PFUZE100_SW1C: 300 <--> 1875 mV at 1300 mV

print_constraints: PFUZE100_SW2: 800 <--> 3950 mV at 3300 mV

print_constraints: PFUZE100_SW3A: 400 <--> 1975 mV at 1500 mV

print_constraints: PFUZE100_SW3B: 400 <--> 1975 mV at 1500 mV

print_constraints: PFUZE100_SW4: 800 <--> 3950 mV at 3150 mV

print_constraints: PFUZE100_SWBST: 5000 <--> 5150 mV at 5000 mV

print_constraints: PFUZE100_VSNVS: 1200 <--> 3000 mV at 1800 mV

print_constraints: PFUZE100_VREFDDR: at 750 mV

print_constraints: PFUZE100_VGEN1: 800 <--> 1550 mV at 1500 mV

print_constraints: PFUZE100_VGEN2: 800 <--> 1550 mV at 1500 mV

print_constraints: PFUZE100_VGEN3: 1800 <--> 3300 mV at 2800 mV

print_constraints: PFUZE100_VGEN4: 1800 <--> 3300 mV at 1800 mV

print_constraints: PFUZE100_VGEN5: 1800 <--> 3300 mV at 3000 mV

print_constraints: PFUZE100_VGEN6: 1800 <--> 3300 mV at 3300 mV

Can anyone give me a clue what is the problem?

Thanks!

Re: Linux hangs after: print_constraints

adrian_alonso — Fri, 07 Jun 2013 21:12:39 GMT

Which board revision are you using?

I haven't experience hangs as you.

U-boot promts the CPU revision like this one

CPU: Freescale i.MX6 family TO1.2

Can you share which CPU revision is reported by uboot in your board.

Regards

Re: Linux hangs after: print_constraints

jotes — Mon, 10 Jun 2013 06:40:14 GMT

U-boot shows:

CPU: Freescale i.MX6 family TO1.2 at 792 MHz

Re: Linux hangs after: print_constraints

adrian_alonso — Mon, 10 Jun 2013 22:11:55 GMT

Um I haven't been able to reproduce a boot freeze.

In your setup which device is your default storage device;

I used latest release L3.0.35_4.0.0_130424.

Can you enable printk support; provide a complete log.

Regards

Re: Linux hangs after: print_constraints

jotes — Tue, 11 Jun 2013 06:35:32 GMT

Recently, I've started to use L3.0.35_4.0.0_130424 release, and (so far!) everything seems to be ok. System is booting from SD card.

But when I was using L3.0.35_1.1.0_121218 release, such hangs occurred quite often (about once for every ten booting processes).

U-Boot 2009.08 (May 16 2013 - 12:59:42)

CPU: Freescale i.MX6 family TO1.2 at 792 MHz

Temperature: 40 C, calibration data 0x5b250d7d

mx6q pll1: 792MHz

mx6q pll2: 528MHz

mx6q pll3: 480MHz

mx6q pll8: 50MHz

ipg clock : 66000000Hz

ipg per clock : 66000000Hz

uart clock : 80000000Hz

cspi clock : 60000000Hz

ahb clock : 132000000Hz

axi clock : 264000000Hz

emi_slow clock: 132000000Hz

ddr clock : 528000000Hz

usdhc1 clock : 198000000Hz

usdhc2 clock : 198000000Hz

usdhc3 clock : 198000000Hz

usdhc4 clock : 198000000Hz

nfc clock : 24000000Hz

Board: i.MX6Q-SABRESD: unknown-board Board: 0x63012 [POR ]

Boot Device: SD

I2C: ready

DRAM: 1 GB

MMC: FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3

In: serial

Out: serial

Err: serial

Found PFUZE100! deviceid=10,revid=11

Net: got MAC address from IIM: 00:04:9f:02:af:ea

FEC0 [PRIME]

Hit any key to stop autoboot: 0

mmc2 is current device

MMC read: dev # 2, block # 2048, count 8192 ... 8192 blocks read: OK

## Booting kernel from Legacy Image at 10800000 ...

Image Name: Linux-3.0.35-2310-gc27cb38

Image Type: ARM Linux Kernel Image (uncompressed)

Data Size: 3789736 Bytes = 3.6 MB

Load Address: 10008000

Entry Point: 10008000

Verifying Checksum ... OK

Loading Kernel Image ... OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

Linux version 3.0.35-2310-gc27cb38 (jotes@ubuntu) (gcc version 4.6.2 20110630 (prerelease) (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) ) #71 PREEMPT Wed May 29 12:43:59 CEST 2013

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

CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache

Machine: Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board

Ignoring unrecognised tag 0x54410008

Memory policy: ECC disabled, Data cache writeback

CPU identified as i.MX6Q, silicon rev 1.2

Built 1 zonelists in Zone order, mobility grouping on. Total pages: 227328

Kernel command line: console=ttymxc0,115200 ip=dhcp root=/dev/mmcblk1p1 rootwait rw video=mxcfb0:dev=ldb,LDB-XGA,if=RGB666 ldb=sin1

PID hash table entries: 4096 (order: 2, 16384 bytes)

Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)

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

Memory: 640MB 256MB = 896MB total

Memory: 897024k/897024k available, 151552k reserved, 0K highmem

Virtual kernel memory layout:

vector : 0xffff0000 - 0xffff1000 ( 4 kB)

fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)

DMA : 0xf4600000 - 0xffe00000 ( 184 MB)

vmalloc : 0xc0800000 - 0xf2000000 ( 792 MB)

lowmem : 0x80000000 - 0xc0000000 (1024 MB)

pkmap : 0x7fe00000 - 0x80000000 ( 2 MB)

modules : 0x7f000000 - 0x7fe00000 ( 14 MB)

.init : 0x80008000 - 0x80036000 ( 184 kB)

.text : 0x80036000 - 0x80a864dc (10562 kB)

.data : 0x80a88000 - 0x80ae1fc0 ( 360 kB)

.bss : 0x80ae1fe4 - 0x80b2d460 ( 302 kB)

SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

Preemptible hierarchical RCU implementation.

NR_IRQS:496

MXC GPIO hardware

sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms

arm_max_freq=2

MXC_Early serial console at MMIO 0x2020000 (options '115200')

bootconsole [ttymxc0] enabled

Console: colour dummy device 80x30

Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available

print_constraints: dummy:

NET: Registered protocol family 16

print_constraints: vddpu: 725 <--> 1300 mV at 700 mV fast normal

print_constraints: vddcore: 725 <--> 1300 mV at 1150 mV fast normal

print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal

print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal

print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal

print_constraints: vdd3p0: 2625 <--> 3400 mV at 3000 mV fast normal

hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.

hw-breakpoint: 1 breakpoint(s) reserved for watchpoint single-step.

hw-breakpoint: maximum watchpoint size is 4 bytes.

L310 cache controller enabled

l2x0: 16 ways, CACHE_ID 0x410000c7, AUX_CTRL 0x02070000, Cache size: 1048576 B

bio: create slab <bio-0> at 0

mxs-dma mxs-dma-apbh: initialized

print_constraints: SPKVDD: 4200 mV

print_constraints: vmmc: 3300 mV

SCSI subsystem initialized

spi_imx imx6q-ecspi.0: probed

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

Freescale USB OTG Driver loaded, $Revision: 1.55 $