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How can I build a minimal rootfs for my imx6ull evk?

Question asked by Pablo Cottens on Jun 19, 2017

This is my third time posting questions to this community. I am basically following this post to install debian jessie on my board. After that I try to compile freeswitch for my board, but it simply doesn't compile on my board.


After that I tried creating my own minimal debian rootfs and I can install and run everything on it. I can tell it's using armhf and compiling everything like it was an ARM architecture, but after I exit chroot, I try doing the exact same thing that I do with the linaro image, I compress it into a .tar.bz2 and then load it into the SD card like the post says, but it doesn't load the rootfs apparently. I got the following output and I think that there is a permission error in my init file that doesn't allow me to boot the image I created. OBS: I had to mount proc inside chroot in order to install some programs, so I umounted it after finished because in the process of creating the .tar.bz2 file it gost stuck in /proc/kmode


U-Boot 2016.03 (May 26 2017 - 09:14:55 -0300)

CPU: Freescale i.MX6ULL rev1.0 528 MHz (running at 396 MHz)

CPU: Commercial temperature grade (0C to 95C) at 28C

Reset cause: POR Board: MX6ULL 14x14 EVK I2C: ready


*** Warning - bad CRC, using default environment

Display: TFT43AB (480x272) Video: 480x272x24 In: serial Out: serial Err: serial switch to partitions #0, OK mmc1 is current device Net: FEC1 Normal Boot Hit any key to stop autoboot: 0 switch to partitions #0, OK mmc1 is current device switch to partitions #0, OK mmc1 is current device reading boot.scr ** Unable to read file boot.scr ** reading zImage 6673232 bytes read in 301 ms (21.1 MiB/s) Booting from mmc ... reading imx6ull-14x14-evk.dtb 35969 bytes read in 21 ms (1.6 MiB/s) Kernel image @ 0x80800000 [ 0x000000 - 0x65d350 ] ## Flattened Device Tree blob at 83000000 Booting using the fdt blob at 0x83000000 Using Device Tree in place at 83000000, end 8300bc80 Starting kernel ... Booting Linux on physical CPU 0x0 Linux version 4.1.15 (pablo@pablo-VirtualBox) (gcc version 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) ) #1 SMP PREEMPT Fri May 26 10:07:21 BRT 2017 CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c53c7d CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache Machine model: Freescale i.MX6 ULL 14x14 EVK Board Reserved memory: created CMA memory pool at 0x8c000000, size 320 MiB Reserved memory: initialized node linux,cma, compatible id shared-dma-pool Memory policy: Data cache writealloc PERCPU: Embedded 12 pages/cpu @8bb32000 s16908 r8192 d24052 u49152 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048 Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk1p2 rootwait rw 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: 178564K/524288K available (8404K kernel code, 443K rwdata, 2932K rodata, 444K init, 450K bss, 18044K reserved, 327680K cma-reserved, 0K highmem) Virtual kernel memory layout: vector : 0xffff0000 - 0xffff1000 ( 4 kB) fixmap : 0xffc00000 - 0xfff00000 (3072 kB) vmalloc : 0xa0800000 - 0xff000000 (1512 MB) lowmem : 0x80000000 - 0xa0000000 ( 512 MB) pkmap : 0x7fe00000 - 0x80000000 ( 2 MB) modules : 0x7f000000 - 0x7fe00000 ( 14 MB) .text : 0x80008000 - 0x80b1a434 (11338 kB) .init : 0x80b1b000 - 0x80b8a000 ( 444 kB) .data : 0x80b8a000 - 0x80bf8c20 ( 444 kB) .bss : 0x80bfb000 - 0x80c6b880 ( 451 kB) SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 Preemptible hierarchical RCU implementation. Additional per-CPU info printed with stalls. 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 mxc_clocksource_init 3000000 Switching to timer-based delay loop, resolution 333ns sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 715827882841ns clocksource mxc_timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 637086815595 ns Console: colour dummy device 80x30 Calibrating delay loop (skipped), value calculated using timer frequency.. 6.00 BogoMIPS (lpj=30000) pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes) CPU: Testing write buffer coherency: ok /cpus/cpu@0 missing clock-frequency property CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 Setting up static identity map for 0x80008280 - 0x800082d8 Brought up 1 CPUs SMP: Total of 1 processors activated (6.00 BogoMIPS). CPU: All CPU(s) started in SVC mode. devtmpfs: initialized device-tree: Duplicate name in lcdif@021c8000, renamed to "display#1" VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5 clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns pinctrl core: initialized pinctrl subsystem NET: Registered protocol family 16 DMA: preallocated 256 KiB pool for atomic coherent allocations cpuidle: using governor ladder cpuidle: using governor menu hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers. hw-breakpoint: maximum watchpoint size is 8 bytes. imx6ul-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver imx6ul-pinctrl 2290000.iomuxc-snvs: initialized IMX pinctrl driver mxs-dma 1804000.dma-apbh: initialized SCSI subsystem initialized usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb i2c i2c-0: IMX I2C adapter registered i2c i2c-0: can't use DMA i2c i2c-1: IMX I2C adapter registered i2c i2c-1: can't use DMA Linux video capture interface: v2.00 pps_core: LinuxPPS API ver. 1 registered pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <> PTP clock support registered MIPI CSI2 driver module loaded Advanced Linux Sound Architecture Driver Initialized. Bluetooth: Core ver 2.20 NET: Registered protocol family 31 Bluetooth: HCI device and connection manager initialized Bluetooth: HCI socket layer initialized Bluetooth: L2CAP socket layer initialized Bluetooth: SCO socket layer initialized Switched to clocksource mxc_timer1 NET: Registered protocol family 2 TCP established hash table entries: 4096 (order: 2, 16384 bytes) TCP bind hash table entries: 4096 (order: 3, 32768 bytes) TCP: Hash tables configured (established 4096 bind 4096) UDP hash table entries: 256 (order: 1, 8192 bytes) UDP-Lite hash table entries: 256 (order: 1, 8192 bytes) NET: Registered protocol family 1 RPC: Registered named UNIX socket transport module. RPC: Registered udp transport module. RPC: Registered tcp transport module. RPC: Registered tcp NFSv4.1 backchannel transport module. imx rpmsg driver is registered. Bus freq driver module loaded futex hash table entries: 256 (order: 2, 16384 bytes) VFS: Disk quotas dquot_6.6.0 VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) NFS: Registering the id_resolver key type Key type id_resolver registered Key type id_legacy registered jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc. fuse init (API version 7.23) io scheduler noop registered io scheduler deadline registered io scheduler cfq registered (default) imx-weim 21b8000.weim: Driver registered. backlight supply power not found, using dummy regulator MIPI DSI driver module loaded MIPI DSI driver module loaded 21c8000.lcdif supply lcd not found, using dummy regulator mxsfb 21c8000.lcdif: failed to find mxc display driver Console: switching to colour frame buffer device 60x34 mxsfb 21c8000.lcdif: initialized imx-sdma 20ec000.sdma: no event needs to be remapped imx-sdma 20ec000.sdma: loaded firmware 3.3 imx-sdma 20ec000.sdma: initialized 2020000.serial: ttymxc0 at MMIO 0x2020000 (irq = 18, base_baud = 5000000) is a IMX console [ttymxc0] enabled 21e8000.serial: ttymxc1 at MMIO 0x21e8000 (irq = 235, base_baud = 5000000) is a IMX imx-rng 2284000.rngb: iMX RNG Registered. imx sema4 driver is registered. [drm] Initialized drm 1.1.0 20060810 [drm] Initialized vivante 1.0.0 20120216 on minor 0 brd: module loaded loop: module loaded fsl-quadspi 21e0000.qspi: n25q256a (32768 Kbytes) spi_gpio spi4: gpio-miso property not found, switching to no-rx mode CAN device driver interface flexcan 2090000.can: device registered (reg_base=a09f8000, irq=27) flexcan 2094000.can: device registered (reg_base=a0a00000, irq=28) 20b4000.ethernet supply phy not found, using dummy regulator pps pps0: new PPS source ptp0 libphy: fec_enet_mii_bus: probed fec 20b4000.ethernet eth0: registered PHC device 0 2188000.ethernet supply phy not found, using dummy regulator pps pps1: new PPS source ptp1 fec 2188000.ethernet eth1: registered PHC device 1 usbcore: registered new interface driver asix usbcore: registered new interface driver ax88179_178a usbcore: registered new interface driver cdc_ether usbcore: registered new interface driver net1080 usbcore: registered new interface driver cdc_subset usbcore: registered new interface driver zaurus usbcore: registered new interface driver cdc_ncm ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver ehci-mxc: Freescale On-Chip EHCI Host driver usbcore: registered new interface driver usb-storage usbcore: registered new interface driver usb_ehset_test 2184800.usbmisc supply vbus-wakeup not found, using dummy regulator 2184000.usb supply vbus not found, using dummy regulator 2184200.usb supply vbus not found, using dummy regulator ci_hdrc ci_hdrc.1: EHCI Host Controller ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus number 1 ci_hdrc ci_hdrc.1: USB 2.0 started, EHCI 1.00 hub 1-0:1.0: USB hub found hub 1-0:1.0: 1 port detected mousedev: PS/2 mouse device common for all mice input: 20cc000.snvs:snvs-powerkey as /devices/platform/soc/2000000.aips-bus/20cc000.snvs/20cc000.snvs:snvs-powerkey/input/input0 input: iMX6UL TouchScreen Controller as /devices/platform/soc/2000000.aips-bus/2040000.tsc/input/input1 input: FreescaleAccelerometer as /devices/virtual/input/input2 fxls8471 device driver probe successfully snvs_rtc 20cc000.snvs:snvs-rtc-lp: rtc core: registered 20cc000.snvs:snvs-r as rtc0 i2c /dev entries driver IR NEC protocol handler initialized IR RC5(x/sz) protocol handler initialized IR RC6 protocol handler initialized IR JVC protocol handler initialized IR Sony protocol handler initialized IR SANYO protocol handler initialized IR Sharp protocol handler initialized IR MCE Keyboard/mouse protocol handler initialized IR XMP protocol handler initialized pxp-v4l2 pxp_v4l2: initialized 0-000e supply vdd not found, using dummy regulator 0-000e supply vddio not found, using dummy regulator mag3110 0-000e: check mag3110 chip ID input: mag3110 as /devices/virtual/input/input3 mag3110 0-000e: mag3110 is probed imx2-wdt 20bc000.wdog: use WDOG_B to reboot. imx2-wdt 20bc000.wdog: timeout 60 sec (nowayout=0) Bluetooth: HCI UART driver ver 2.3 Bluetooth: HCI UART protocol H4 registered Bluetooth: HCI UART protocol BCSP registered Bluetooth: HCI UART protocol ATH3K registered usbcore: registered new interface driver bcm203x usbcore: registered new interface driver btusb usbcore: registered new interface driver ath3k sdhci: Secure Digital Host Controller Interface driver sdhci: Copyright(c) Pierre Ossman sdhci-pltfm: SDHCI platform and OF driver helper /soc/aips-bus@02100000/usdhc@02190000: voltage-ranges unspecified sdhci-esdhc-imx 2190000.usdhc: Got CD GPIO sdhci-esdhc-imx 2190000.usdhc: No vqmmc regulator found mmc0: SDHCI controller on 2190000.usdhc [2190000.usdhc] using ADMA /soc/aips-bus@02100000/usdhc@02194000: voltage-ranges unspecified sdhci-esdhc-imx 2194000.usdhc: could not get ultra high speed state, work on normal mode sdhci-esdhc-imx 2194000.usdhc: No vmmc regulator found sdhci-esdhc-imx 2194000.usdhc: No vqmmc regulator found mmc1: SDHCI controller on 2194000.usdhc [2194000.usdhc] using ADMA usbcore: registered new interface driver usbhid usbhid: USB HID core driver fsl-asrc 2034000.asrc: driver registered mmc1: host does not support reading read-only switch, assuming write-enable imx-wm8960 sound: wm8960-hifi <-> 202c000.sai mapping ok mmc1: new high speed SDHC card at address 0001 imx-wm8960 sound: snd-soc-dummy-dai <-> 2034000.asrc mapping ok mmcblk1: mmc1:0001 SD8GB 7.24 GiB imx-wm8960 sound: wm8960-hifi <-> 202c000.sai mapping ok mmcblk1: p1 p2 NET: Registered protocol family 26 NET: Registered protocol family 10 sit: IPv6 over IPv4 tunneling driver NET: Registered protocol family 17 can: controller area network core (rev 20120528 abi 9) NET: Registered protocol family 29 can: raw protocol (rev 20120528) can: broadcast manager protocol (rev 20120528 t) can: netlink gateway (rev 20130117) max_hops=1 Bluetooth: RFCOMM TTY layer initialized Bluetooth: RFCOMM socket layer initialized Bluetooth: RFCOMM ver 1.11 Bluetooth: BNEP (Ethernet Emulation) ver 1.3 Bluetooth: BNEP filters: protocol multicast Bluetooth: BNEP socket layer initialized Bluetooth: HIDP (Human Interface Emulation) ver 1.2 Bluetooth: HIDP socket layer initialized 8021q: 802.1Q VLAN Support v1.8 Key type dns_resolver registered dhd_module_init in snvs_rtc 20cc000.snvs:snvs-rtc-lp: setting system clock to 1970-01-01 00:00:00 UTC (0) gpio_dvfs: disabling VSD_3V3: disabling can-3v3: disabling ALSA device list: #0: wm8960-audio kjournald starting.

Commit interval 5 seconds EXT3-fs (mmcblk1p2): using internal journal EXT3-fs (mmcblk1p2): recovery complete

EXT3-fs (mmcblk1p2): mounted filesystem with ordered data mode

VFS: Mounted root (ext3 filesystem) on device 179:2. devtmpfs: mounted

Freeing unused kernel memory: 444K (80b1b000 - 80b8a000)

Starting init: /etc/init exists but couldn't execute it (error -13)

/bin/sh: 0: can't access tty; job control turned off #