Part Number: AM4372
Hi,
I am having a strange problem with an AM4372 based board when booting Linux. There is no NAND, 2GB of currently empty eMMC and an external SD card which currently has boot priority.
The device will run into a kernel panic when it should run /sbin/init.
Normally this means that either the wrong root path has been specified or that there is nothing useful to boot at that path. Both are not the case:
[ 1.438840] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null) [ 1.447063] VFS: Mounted root (ext4 filesystem) on device 179:2.
He found the path specified in kernel command line, he detected the file system correctly and he mounted it.
The same image (and actually the same SD) works fine in the AM437x EVM and - if replacing the u-boot files - even in BBB, so it do not see an image problem here.
Any good ideas are highly appreciated.
Regards
Peter
U-Boot 2019.01-g0757f3d81d-dirty (Oct 01 2020 - 15:30:20 +0200) CPU : AM437X-GP rev 1.2 Model: SMaBiT SMaWay DRAM: 512 MiB PMIC: TPS65218 NAND: 0 MiB MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 Loading Environment from FAT... *** Warning - bad CRC, using default environment Net: No ethernet found. Hit any key to stop autoboot: 0 switch to partitions #0, OK mmc0 is current device SD/MMC found on device 0 ** Unable to read file boot.scr ** 312 bytes read in 1 ms (304.7 KiB/s) Loaded env from uEnv.txt Importing environment from mmc0 ... switch to partitions #0, OK mmc0 is current device SD/MMC found on device 0 3850752 bytes read in 240 ms (15.3 MiB/s) 43595 bytes read in 4 ms (10.4 MiB/s) ## Flattened Device Tree blob at 88000000 Booting using the fdt blob at 0x88000000 Loading Device Tree to 8fff2000, end 8ffffa4a ... OK Starting kernel ... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 4.19.59-g5f8c1c6121 (phoyer@SmaLin) (gcc version 8.3.0 (GNU Toolchain for the A-profile Architecture 8.3-2019.03 (arm-rel-8.36))) #2 PREEMPT Thu May 7 12:40:21 CEST 2020 [ 0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] OF: fdt: Machine model: SMaBiT SMaWay [ 0.000000] Memory policy: Data cache writeback [ 0.000000] efi: Getting EFI parameters from FDT: [ 0.000000] efi: UEFI not found. [ 0.000000] cma: Reserved 48 MiB at 0x9d000000 [ 0.000000] CPU: All CPU(s) started in SVC mode. [ 0.000000] AM437x ES1.2 (neon) [ 0.000000] random: get_random_bytes called from start_kernel+0xa4/0x434 with crng_init=0 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 105344 [ 0.000000] Kernel command line: console=ttyO0,115200n8 net.ifnames=0 biosdevnames=0 root=PARTUUID=48b4e363-02 rw rootfstype=ext4 rootwait [ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) [ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) [ 0.000000] Memory: 359504K/425984K available (8192K kernel code, 295K rwdata, 2428K rodata, 1024K init, 250K bss, 17328K reserved, 49152K cma-reserved, 0K highmem) [ 0.000000] Virtual kernel memory layout: [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) [ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB) [ 0.000000] vmalloc : 0xe0800000 - 0xff800000 ( 496 MB) [ 0.000000] lowmem : 0xc0000000 - 0xe0000000 ( 512 MB) [ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) [ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB) [ 0.000000] .text : 0x(ptrval) - 0x(ptrval) (9184 kB) [ 0.000000] .init : 0x(ptrval) - 0x(ptrval) (1024 kB) [ 0.000000] .data : 0x(ptrval) - 0x(ptrval) ( 296 kB) [ 0.000000] .bss : 0x(ptrval) - 0x(ptrval) ( 251 kB) [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.000000] rcu: Preemptible hierarchical RCU implementation. [ 0.000000] Tasks RCU enabled. [ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16 [ 0.000000] L2C: platform modifies aux control register: 0x0e030000 -> 0x3e430000 [ 0.000000] L2C: DT/platform modifies aux control register: 0x0e030000 -> 0x3e430000 [ 0.000000] L2C-310 enabling early BRESP for Cortex-A9 [ 0.000000] OMAP L2C310: ROM does not support power control setting [ 0.000000] L2C-310 dynamic clock gating disabled, standby mode disabled [ 0.000000] L2C-310 cache controller enabled, 16 ways, 256 kB [ 0.000000] L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x4e430000 [ 0.000000] OMAP clockevent source: timer2 at 24000000 Hz [ 0.000016] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns [ 0.000041] clocksource: timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns [ 0.000055] OMAP clocksource: timer1 at 24000000 Hz [ 0.000645] clocksource: 32k_counter: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 58327039986419 ns [ 0.000660] OMAP clocksource: 32k_counter at 32768 Hz [ 0.001171] Console: colour dummy device 80x30 [ 0.001210] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0' [ 0.001218] This ensures that you still see kernel messages. Please [ 0.001226] update your kernel commandline. [ 0.001285] Calibrating delay loop... 1196.85 BogoMIPS (lpj=5984256) [ 0.090237] pid_max: default: 32768 minimum: 301 [ 0.090501] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) [ 0.090527] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes) [ 0.091578] CPU: Testing write buffer coherency: ok [ 0.091663] CPU0: Spectre v2: using BPIALL workaround [ 0.092980] Setting up static identity map for 0x80100000 - 0x80100060 [ 0.093193] rcu: Hierarchical SRCU implementation. [ 0.093709] EFI services will not be available. [ 0.094843] devtmpfs: initialized [ 0.107456] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4 [ 0.108034] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 0.108068] futex hash table entries: 256 (order: -1, 3072 bytes) [ 0.113206] pinctrl core: initialized pinctrl subsystem [ 0.114294] DMI not present or invalid. [ 0.114905] NET: Registered protocol family 16 [ 0.118563] DMA: preallocated 256 KiB pool for atomic coherent allocations [ 0.202910] cpuidle: using governor ladder [ 0.202963] cpuidle: using governor menu [ 0.213229] OMAP GPIO hardware version 0.1 [ 0.220989] No ATAGs? [ 0.221024] hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers. [ 0.221045] hw-breakpoint: maximum watchpoint size is 4 bytes. [ 0.239819] edma 49000000.edma: TI EDMA DMA engine driver [ 0.244216] media: Linux media interface: v0.10 [ 0.244283] videodev: Linux video capture interface: v2.00 [ 0.244405] pps_core: LinuxPPS API ver. 1 registered [ 0.244417] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it> [ 0.244447] PTP clock support registered [ 0.244499] EDAC MC: Ver: 3.0.0 [ 0.245589] omap-mailbox 480c8000.mailbox: omap mailbox rev 0x400 [ 0.247929] clocksource: Switched to clocksource timer1 [ 0.259323] NET: Registered protocol family 2 [ 0.260416] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 bytes) [ 0.260464] TCP established hash table entries: 4096 (order: 2, 16384 bytes) [ 0.260521] TCP bind hash table entries: 4096 (order: 2, 16384 bytes) [ 0.260588] TCP: Hash tables configured (established 4096 bind 4096) [ 0.260778] UDP hash table entries: 256 (order: 0, 4096 bytes) [ 0.260806] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) [ 0.260996] NET: Registered protocol family 1 [ 0.261828] RPC: Registered named UNIX socket transport module. [ 0.261846] RPC: Registered udp transport module. [ 0.261855] RPC: Registered tcp transport module. [ 0.261863] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 0.264270] Initialise system trusted keyrings [ 0.264683] workingset: timestamp_bits=14 max_order=17 bucket_order=3 [ 0.271203] squashfs: version 4.0 (2009/01/31) Phillip Lougher [ 0.272210] NFS: Registering the id_resolver key type [ 0.272261] Key type id_resolver registered [ 0.272272] Key type id_legacy registered [ 0.272328] ntfs: driver 2.1.32 [Flags: R/O]. [ 0.275558] Key type asymmetric registered [ 0.275581] Asymmetric key parser 'x509' registered [ 0.275681] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 245) [ 0.275699] io scheduler noop registered [ 0.275710] io scheduler deadline registered [ 0.276059] io scheduler cfq registered (default) [ 0.276075] io scheduler mq-deadline registered [ 0.276085] io scheduler kyber registered [ 0.279953] pinctrl-single 44e10800.pinmux: 199 pins, size 796 [ 0.347687] Serial: 8250/16550 driver, 10 ports, IRQ sharing enabled [ 0.352314] omap8250 44e09000.serial: No clock speed specified: using default: 48000000 [ 0.353304] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 31, base_baud = 3000000) is a 8250 [ 1.014358] console [ttyS0] enabled [ 1.020525] omap_rng 48310000.rng: Random Number Generator ver. 20 [ 1.028141] random: fast init done [ 1.031855] random: crng init done [ 1.055410] brd: module loaded [ 1.071868] loop: module loaded [ 1.078235] libphy: Fixed MDIO Bus: probed [ 1.084399] i2c /dev entries driver [ 1.090422] cpuidle: enable-method property 'ti,am4372' found operations [ 1.097729] sdhci: Secure Digital Host Controller Interface driver [ 1.104011] sdhci: Copyright(c) Pierre Ossman [ 1.111097] sdhci-pltfm: SDHCI platform and OF driver helper [ 1.117709] ledtrig-cpu: registered to indicate activity on CPUs [ 1.126160] NET: Registered protocol family 10 [ 1.132122] Segment Routing with IPv6 [ 1.135923] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver [ 1.142945] NET: Registered protocol family 17 [ 1.147770] Key type dns_resolver registered [ 1.152495] omap_voltage_late_init: Voltage driver support not added [ 1.160148] Loading compiled-in X.509 certificates [ 1.224449] omap_i2c 44e0b000.i2c: bus 0 rev0.12 at 100 kHz [ 1.230611] cpu cpu0: Linked as a consumer to regulator.2 [ 1.236119] cpu cpu0: Dropping the link to regulator.2 [ 1.241639] cpu cpu0: Linked as a consumer to regulator.2 [ 1.249236] omap_hsmmc 48060000.mmc: Linked as a consumer to regulator.4 [ 1.283226] omap_hsmmc 481d8000.mmc: Linked as a consumer to regulator.4 [ 1.314322] hctosys: unable to open rtc device (rtc0) [ 1.324279] Waiting for root device PARTUUID=48b4e363-02... [ 1.332009] mmc0: host does not support reading read-only switch, assuming write-enable [ 1.342206] mmc0: new high speed SDHC card at address 1234 [ 1.351153] mmcblk0: mmc0:1234 SA32G 28.9 GiB [ 1.359464] mmcblk0: p1 p2 p3 p4 < p5 p6 > [ 1.382426] mmc1: new high speed MMC card at address 0001 [ 1.393077] mmcblk1: mmc1:0001 MMC02G 1.79 GiB [ 1.399643] mmcblk1boot0: mmc1:0001 MMC02G partition 1 1.00 MiB [ 1.407309] mmcblk1boot1: mmc1:0001 MMC02G partition 2 1.00 MiB [ 1.413981] mmcblk1rpmb: mmc1:0001 MMC02G partition 3 128 KiB, chardev (244:0) [ 1.432813] EXT4-fs (mmcblk0p2): recovery complete [ 1.438840] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null) [ 1.447063] VFS: Mounted root (ext4 filesystem) on device 179:2. [ 1.462518] devtmpfs: mounted [ 1.468761] Freeing unused kernel memory: 1024K [ 1.473526] Run /sbin/init as init process [ 1.511528] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 1.511528] [ 1.520756] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 1.520756] ]---
