I am building an embedded linux distro on a Beaglebone Black (AM335x chip Cortex-A8 Arm-v7 Instruction set) using crosstool-NG, U-Boot, Kernel (5.5.5) and buildroot. When compiling the kernel I am getting this error message:
/tmp/ccxFZlyN.s: Assembler messages: /tmp/ccxFZlyN.s:39: Error: selected processor does not support `isb ' in ARM mode /tmp/ccxFZlyN.s:90: Error: selected processor does not support `isb ' in ARM mode /tmp/ccxFZlyN.s:371: Error: selected processor does not support `isb ' in ARM mode scripts/Makefile.build:265: recipe for target 'arch/arm/vfp/vfpmodule.o' failed make[1]: *** [arch/arm/vfp/vfpmodule.o] Error 1 Makefile:1693: recipe for target 'arch/arm/vfp' failed make: *** [arch/arm/vfp] Error 2make: *** Waiting for unfinished jobs.... CC init/do_mounts_rd.o CC init/do_mounts_initrd.o/tmp/ccg2MH8t.s: Assembler messages:/tmp/ccg2MH8t.s:275: Error: selected processor does not support `dmb ish' in ARM mode/tmp/ccg2MH8t.s:278: Error: architectural extension `mp' is not allowed for the current base architecture/tmp/ccg2MH8t.s:279: Error: selected processor does not support `pldw [r3]' in ARM mode/tmp/ccg2MH8t.s:282: Error: selected processor does not support `pld [r3]' in ARM mode/tmp/ccg2MH8t.s:288: Error: selected processor does not support `ldrex r2,[r3]' in ARM mode/tmp/ccg2MH8t.s:290: Error: selected processor does not support `strex r1,r2,[r3]' in ARM mode/tmp/ccg2MH8t.s:295: Error: selected processor does not support `dmb ish' in ARM modescripts/Makefile.build:265: recipe for target 'init/do_mounts.o' failedmake[1]: *** [init/do_mounts.o] Error 1make[1]: *** Waiting for unfinished jobs..../tmp/ccFNavBu.s: Assembler messages:/tmp/ccFNavBu.s:1990: Error: selected processor does not support `cpsid i' in ARM mode/tmp/ccFNavBu.s:2123: Error: selected processor does not support `cpsid i' in ARM mode/tmp/ccFNavBu.s:2204: Error: selected processor does not support `cpsie i' in ARM mode/tmp/ccFNavBu.s:2426: Error: selected processor does not support `cpsie i' in ARM modescripts/Makefile.build:265: recipe for target 'init/main.o' failedHere is my toolchain:
arm-cortex_a8-linux-gnueabihf-gcc -vUsing built-in specs.COLLECT_GCC=arm-cortex_a8-linux-gnueabihf-gccCOLLECT_LTO_WRAPPER=/home/john/x-tools/arm-cortex_a8-linux-gnueabihf/libexec/gcc/arm-cortex_a8-linux-gnueabihf/9.2.0/lto-wrapperTarget: arm-cortex_a8-linux-gnueabihfConfigured with: /home/john/Documents/crosstool-ng/.build/arm-cortex_a8-linux-gnueabihf/src/gcc/configure --build=x86_64-build_pc-linux-gnu --host=x86_64-build_pc-linux-gnu --target=arm-cortex_a8-linux-gnueabihf --prefix=/home/john/x-tools/arm-cortex_a8-linux-gnueabihf --with-sysroot=/home/john/x-tools/arm-cortex_a8-linux-gnueabihf/arm-cortex_a8-linux-gnueabihf/sysroot --enable-languages=c,c++ --with-cpu=cortex-a8 --with-float=hard --with-pkgversion='crosstool-NG 1.24.0.105_5659366' --enable-__cxa_atexit --disable-libmudflap --disable-libgomp --disable-libssp --disable-libquadmath --disable-libquadmath-support --disable-libsanitizer --disable-libmpx --with-gmp=/home/john/Documents/crosstool-ng/.build/arm-cortex_a8-linux-gnueabihf/buildtools --with-mpfr=/home/john/Documents/crosstool-ng/.build/arm-cortex_a8-linux-gnueabihf/buildtools --with-mpc=/home/john/Documents/crosstool-ng/.build/arm-cortex_a8-linux-gnueabihf/buildtools --with-isl=/home/john/Documents/crosstool-ng/.build/arm-cortex_a8-linux-gnueabihf/buildtools --enable-lto --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --enable-threads=posix --enable-target-optspace --enable-plugin --enable-gold --disable-nls --disable-multilib --with-local-prefix=/home/john/x-tools/arm-cortex_a8-linux-gnueabihf/arm-cortex_a8-linux-gnueabihf/sysroot --enable-long-longThread model: posixgcc version 9.2.0 (crosstool-NG 1.24.0.105_5659366) Here is my full bootlog:
U-Boot 2020.04 (Jun 11 2020 - 15:14:20 +0100) CPU : AM335X-GP rev 2.1 Model: TI AM335x BeagleBone Black DRAM: 512 MiB WDT: Started with servicing (60s timeout) NAND: 0 MiB MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 Loading Environment from FAT... OK Net: eth0: ethernet@4a100000 Warning: usb_ether MAC addresses don't match: Address in ROM is de:ad:be:ef:00:01 Address in environment is 0c:ae:7d:0c:4f:f4 , eth1: usb_ether Hit any key to stop autoboot: 0 switch to partitions #0, OK mmc0 is current device SD/MMC found on device 0 475 bytes read in 3 ms (154.3 KiB/s) Loaded env from uEnv.txt Importing environment from mmc0 ... Running uenvcmd ... 7995904 bytes read in 515 ms (14.8 MiB/s) 33325 bytes read in 6 ms (5.3 MiB/s) ## Flattened Device Tree blob at 80f80000 Booting using the fdt blob at 0x80f80000 Loading Device Tree to 8fff4000, end 8ffff22c ... OK Starting kernel ... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 5.5.5-john (john@homepc) (gcc version 9.2.0 (crosstool-NG 1.24.0.105_5659366)) #1 SMP Thu Jun 11 13:29:44 BST 2020 [ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] OF: fdt: Machine model: TI AM335x BeagleBone Black [ 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 64 MiB at 0x9b800000 [ 0.000000] CPU: All CPU(s) started in SVC mode. [ 0.000000] AM335X ES2.1 (sgx neon) [ 0.000000] percpu: Embedded 19 pages/cpu s48908 r8192 d20724 u77824 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 129540 [ 0.000000] Kernel command line: console=ttyO0,115200 root=/dev/mmcblk0p2 rootfstype=ext4 [ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes, linear)[ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes, linear)[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off[ 0.000000] Memory: 432996K/522240K available (11264K kernel code, 1131K rwdata, 4240K rodata, 1024K init, 306K bss, 23708K reserved, 65536K cma-reserved, 0K highmem)[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1[ 0.000000] rcu: Hierarchical RCU implementation.[ 0.000000] rcu: RCU event tracing is enabled.[ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=16 to nr_cpu_ids=1.[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.[ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16[ 0.000000] IRQ: Found an INTC at 0x(ptrval) (revision 5.0) with 128 interrupts[ 0.000000] random: get_random_bytes called from start_kernel+0x314/0x4c0 with crng_init=0[ 0.000000] OMAP clockevent source: timer2 at 24000000 Hz[ 0.000015] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns[ 0.000034] clocksource: timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns[ 0.000044] OMAP clocksource: timer1 at 24000000 Hz[ 0.001702] timer_probe: no matching timers found[ 0.001897] Console: colour dummy device 80x30[ 0.001923] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'[ 0.001930] This ensures that you still see kernel messages. Please[ 0.001935] update your kernel commandline.[ 0.001974] Calibrating delay loop... 996.14 BogoMIPS (lpj=4980736)[ 0.089197] pid_max: default: 32768 minimum: 301[ 0.089352] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)[ 0.089367] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)[ 0.090125] CPU: Testing write buffer coherency: ok[ 0.090197] CPU0: Spectre v2: using BPIALL workaround[ 0.090576] CPU0: thread -1, cpu 0, socket -1, mpidr 0[ 0.091191] Setting up static identity map for 0x80300000 - 0x803000ac[ 0.091613] rcu: Hierarchical SRCU implementation.[ 0.094062] EFI services will not be available.[ 0.094229] smp: Bringing up secondary CPUs ...[ 0.094242] smp: Brought up 1 node, 1 CPU[ 0.094252] SMP: Total of 1 processors activated (996.14 BogoMIPS).[ 0.094259] CPU: All CPU(s) started in SVC mode.[ 0.094791] devtmpfs: initialized[ 0.101284] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3[ 0.101581] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns[ 0.101610] futex hash table entries: 256 (order: 2, 16384 bytes, linear)[ 0.105563] pinctrl core: initialized pinctrl subsystem[ 0.107106] thermal_sys: Registered thermal governor 'step_wise'[ 0.107372] DMI not present or invalid.[ 0.107846] NET: Registered protocol family 16[ 0.110311] DMA: preallocated 256 KiB pool for atomic coherent allocations[ 0.132055] l4_wkup_cm:clk:0010:0: failed to disable[ 0.134222] cpuidle: using governor menu[ 0.140353] platform 44e07000.gpio: Cannot lookup hwmod 'gpio1'[ 0.140559] omap_gpio 44e07000.gpio: Could not get gpio dbck. Disable debounce[ 0.140581] omap_gpio 44e07000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info[ 0.141005] OMAP GPIO hardware version 0.1[ 0.141300] platform 4804c000.gpio: Cannot lookup hwmod 'gpio2'[ 0.141513] omap_gpio 4804c000.gpio: Could not get gpio dbck. Disable debounce[ 0.141531] omap_gpio 4804c000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info[ 0.142104] platform 481ac000.gpio: Cannot lookup hwmod 'gpio3'[ 0.142308] omap_gpio 481ac000.gpio: Could not get gpio dbck. Disable debounce[ 0.142326] omap_gpio 481ac000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info[ 0.142870] platform 481ae000.gpio: Cannot lookup hwmod 'gpio4'[ 0.143060] omap_gpio 481ae000.gpio: Could not get gpio dbck. Disable debounce[ 0.143075] omap_gpio 481ae000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info[ 0.143603] platform 44e09000.serial: Cannot lookup hwmod 'uart1'[ 0.144022] platform 44e0b000.i2c: Cannot lookup hwmod 'i2c1'[ 0.144318] platform 4819c000.i2c: Cannot lookup hwmod 'i2c3'[ 0.144581] platform 48060000.mmc: Cannot lookup hwmod 'mmc1'[ 0.144843] platform 481d8000.mmc: Cannot lookup hwmod 'mmc2'[ 0.145407] platform 44e35000.wdt: Cannot lookup hwmod 'wd_timer2'[ 0.145706] platform 480c8000.mailbox: Cannot lookup hwmod 'mailbox'[ 0.147736] platform 47400000.usb: Cannot lookup hwmod 'usb_otg_hs'[ 0.148253] platform 4a100000.ethernet: Cannot lookup hwmod 'cpgmac0'[ 0.150389] platform 48310000.rng: Cannot lookup hwmod 'rng'[ 0.151017] No ATAGs?[ 0.151024] hw-breakpoint: debug architecture 0x4 unsupported.[ 0.153962] Serial: AMBA PL011 UART driver[ 0.173976] edma 49000000.edma: TI EDMA DMA engine driver[ 0.177034] iommu: Default domain type: Translated[ 0.177379] vgaarb: loaded[ 0.178274] SCSI subsystem initialized[ 0.178877] usbcore: registered new interface driver usbfs[ 0.178928] usbcore: registered new interface driver hub[ 0.178986] usbcore: registered new device driver usb[ 0.180177] pps_core: LinuxPPS API ver. 1 registered[ 0.180191] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>[ 0.180213] PTP clock support registered[ 0.180374] EDAC MC: Ver: 3.0.0[ 0.183425] clocksource: Switched to clocksource timer1[ 0.760718] NET: Registered protocol family 2[ 0.761388] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)[ 0.761416] TCP established hash table entries: 4096 (order: 2, 16384 bytes, linear)[ 0.761458] TCP bind hash table entries: 4096 (order: 3, 32768 bytes, linear)[ 0.761517] TCP: Hash tables configured (established 4096 bind 4096)[ 0.761633] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)[ 0.761659] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)[ 0.761799] NET: Registered protocol family 1[ 0.762495] RPC: Registered named UNIX socket transport module.[ 0.762508] RPC: Registered udp transport module.[ 0.762515] RPC: Registered tcp transport module.[ 0.762521] RPC: Registered tcp NFSv4.1 backchannel transport module.[ 0.762535] PCI: CLS 0 bytes, default 64[ 0.763813] hw perfevents: enabled with armv7_cortex_a8 PMU driver, 5 counters available[ 0.765384] Initialise system trusted keyrings[ 0.765727] workingset: timestamp_bits=30 max_order=17 bucket_order=0[ 0.771682] squashfs: version 4.0 (2009/01/31) Phillip Lougher[ 0.772630] NFS: Registering the id_resolver key type[ 0.772677] Key type id_resolver registered[ 0.772685] Key type id_legacy registered[ 0.772730] ntfs: driver 2.1.32 [Flags: R/O].[ 0.773274] Key type asymmetric registered[ 0.773285] Asymmetric key parser 'x509' registered[ 0.773342] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)[ 0.773353] io scheduler mq-deadline registered[ 0.773360] io scheduler kyber registered[ 0.776728] pinctrl-single 44e10800.pinmux: 142 pins, size 568[ 0.832881] Serial: 8250/16550 driver, 5 ports, IRQ sharing enabled[ 0.835861] omap8250 44e09000.serial: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info[ 0.836680] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 30, base_baud = 3000000) is a 8250[ 1.608905] printk: console [ttyS0] enabled[ 1.614361] SuperH (H)SCI(F) driver initialized[ 1.619312] msm_serial: driver initialized[ 1.623670] STMicroelectronics ASC driver initialized[ 1.629822] STM32 USART driver initialized[ 1.634758] omap_rng 48310000.rng: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info[ 1.643478] omap_rng 48310000.rng: Failed to runtime_get device: -19[ 1.649861] omap_rng 48310000.rng: initialization failed.[ 1.668610] brd: module loaded[ 1.679286] loop: module loaded[ 1.688192] libphy: Fixed MDIO Bus: probed[ 1.693549] CAN device driver interface[ 1.698157] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k[ 1.704072] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.[ 1.725075] cpsw 4a100000.ethernet: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info[ 1.734257] pegasus: v0.9.3 (2013/04/25), Pegasus/Pegasus II USB Ethernet driver[ 1.741748] usbcore: registered new interface driver pegasus[ 1.747522] usbcore: registered new interface driver asix[ 1.752974] usbcore: registered new interface driver ax88179_178a[ 1.759153] usbcore: registered new interface driver cdc_ether[ 1.765082] usbcore: registered new interface driver smsc75xx[ 1.770893] usbcore: registered new interface driver smsc95xx[ 1.776715] usbcore: registered new interface driver net1080[ 1.782424] usbcore: registered new interface driver cdc_subset[ 1.788416] usbcore: registered new interface driver zaurus[ 1.794079] usbcore: registered new interface driver cdc_ncm[ 1.801423] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver[ 1.808049] ehci-pci: EHCI PCI platform driver[ 1.812558] ehci-platform: EHCI generic platform driver[ 1.818008] ehci-st: EHCI STMicroelectronics driver[ 1.823011] tegra-ehci: Tegra EHCI driver[ 1.827199] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver[ 1.833472] ohci-pci: OHCI PCI platform driver[ 1.837984] ohci-platform: OHCI generic platform driver[ 1.843427] ohci-st: OHCI STMicroelectronics driver[ 1.848834] usbcore: registered new interface driver usb-storage[ 1.857926] i2c /dev entries driver[ 1.867206] sdhci: Secure Digital Host Controller Interface driver[ 1.873499] sdhci: Copyright(c) Pierre Ossman[ 1.878477] omap_gpio 44e07000.gpio: Could not set line 6 debounce to 200000 microseconds (-524)[ 1.887371] omap_hsmmc 48060000.mmc: Got CD GPIO[ 1.892220] omap_hsmmc: probe of 48060000.mmc failed with error -2[ 1.898768] omap_hsmmc: probe of 481d8000.mmc failed with error -2[ 1.905886] Synopsys Designware Multimedia Card Interface Driver[ 1.912404] sdhci-pltfm: SDHCI platform and OF driver helper[ 1.920105] ledtrig-cpu: registered to indicate activity on CPUs[ 1.927530] usbcore: registered new interface driver usbhid[ 1.933134] usbhid: USB HID core driver[ 1.938468] drop_monitor: Initializing network drop monitor service[ 1.945737] NET: Registered protocol family 10[ 1.951373] Segment Routing with IPv6[ 1.955262] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver[ 1.961939] NET: Registered protocol family 17[ 1.966492] can: controller area network core (rev 20170425 abi 9)[ 1.972784] NET: Registered protocol family 29[ 1.977277] can: raw protocol (rev 20170425)[ 1.981566] can: broadcast manager protocol (rev 20170425 t)[ 1.987274] can: netlink gateway (rev 20190810) max_hops=1[ 1.993306] Key type dns_resolver registered[ 1.997802] ThumbEE CPU extension supported.[ 2.002106] Registering SWP/SWPB emulation handler[ 2.007212] omap_voltage_late_init: Voltage driver support not added[ 2.014818] Loading compiled-in X.509 certificates[ 2.034806] omap_i2c 44e0b000.i2c: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info[ 2.045484] omap_i2c 4819c000.i2c: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info[ 2.056304] hctosys: unable to open rtc device (rtc0)[ 2.066764] l4_per_cm:clk:0008:0: failed to disable[ 2.076823] l4_wkup_cm:clk:00d0:0: failed to disable[ 2.086878] l4_wkup_cm:clk:00b0:0: failed to disable[ 2.093215] VFS: Cannot open root device "mmcblk0p2" or unknown-block(0,0): error -6[ 2.101092] Please append a correct "root=" boot option; here are the available partitions:[ 2.109521] 0100 65536 ram0[ 2.109524] (driver?)[ 2.115670] 0101 65536 ram1[ 2.115672] (driver?)[ 2.121797] 0102 65536 ram2[ 2.121799] (driver?)[ 2.127940] 0103 65536 ram3[ 2.127942] (driver?)[ 2.134083] 0104 65536 ram4[ 2.134085] (driver?)[ 2.140212] 0105 65536 ram5[ 2.140214] (driver?)[ 2.146353] 0106 65536 ram6[ 2.146355] (driver?)[ 2.152481] 0107 65536 ram7[ 2.152483] (driver?)[ 2.158622] 0108 65536 ram8[ 2.158624] (driver?)[ 2.164764] 0109 65536 ram9[ 2.164766] (driver?)[ 2.170892] 010a 65536 ram10[ 2.170894] (driver?)[ 2.177121] 010b 65536 ram11[ 2.177123] (driver?)[ 2.183335] 010c 65536 ram12[ 2.177121] 010b 65536 ram11[ 2.177123] (driver?)[ 2.183335] 010c 65536 ram12[ 2.183337] (driver?)[ 2.189566] 010d 65536 ram13[ 2.189568] (driver?)[ 2.195796] 010e 65536 ram14[ 2.195798] (driver?)[ 2.202010] 010f 65536 ram15[ 2.202012] (driver?)[ 2.208247] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)[ 2.216554] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.5.5-john #1[ 2.223368] Hardware name: Generic AM33XX (Flattened Device Tree)[ 2.229528] [<c03124e0>] (unwind_backtrace) from [<c030c6dc>] (show_stack+0x10/0x14)[ 2.237319] [<c030c6dc>] (show_stack) from [<c0daa3e8>] (dump_stack+0xbc/0xd0)[ 2.244585] [<c0daa3e8>] (dump_stack) from [<c0338e60>] (panic+0x110/0x328)[ 2.251586] [<c0338e60>] (panic) from [<c13014d8>] (mount_block_root+0x1ac/0x240)[ 2.259105] [<c13014d8>] (mount_block_root) from [<c13017d8>] (mount_root+0x124/0x148)[ 2.267057] [<c13017d8>] (mount_root) from [<c130197c>] (prepare_namespace+0x180/0x1bc)[ 2.275100] [<c130197c>] (prepare_namespace) from [<c0dc1e50>] (kernel_init+0x8/0x110)[ 2.283055] [<c0dc1e50>] (kernel_init) from [<c03010e8>] (ret_from_fork+0x14/0x2c)[ 2.290655] Exception stack(0xdb0b1fb0 to 0xdb0b1ff8)[ 2.295728] 1fa0: 00000000 00000000 00000000 00000000[ 2.303941] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000[ 2.312152] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000[ 2.318812] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---So it looks like the device can read partition one fine since its reading uEnv.txt but it can't mount or read partition two of the sd card