Linux + SD card (rootfs)
busybox Download link: https://busybox.net/
download
wget https://busybox.net/downloads/busybox-1.36.1.tar.bz2
Unzip
tar -vxf busybox-1.36.1.tar.bz2
and go to its root directory
export ARCH=arm export CROSS_COMPILE=arm-none-linux-gnueabihf- makedefconfig make menuconfig # Check Settings-> [*] Build static binary (no shared libs) make -j6 make install
After the above steps are executed, an _install folder is generated in the root directory of busybox.
Find a directory to create the root file system of Linux
# Find a random directory and create the root file system of Linux cd rootfs # Copy all _install files to the rootfs folder cp -r /home/tyustli/code/open_source/busybox/busybox-1.36.1/_install/* ./ #Copy library files mkdirlib cp -r /home/tyustli/cross_tool/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/lib/* lib/ #Create device node mkdirdev cddev # Create multiple tty devices, be careful not to repeat sub-device numbers sudo mknod -m 666 tty1 c 4 1 sudo mknod -m 666 tty2 c 4 2 sudo mknod -m 666 tty3 c 4 3 sudo mknod -m 666 tty4 c 4 4 sudo mknod -m 666 tty5 c 4 5 sudo mknod -m 666 tty6 c 4 6 #Create a console node sudo mknod -m 666 console c 5 1 #Create an empty node sudo mknod -m 666 null c 1 3 cd ../../ # Generate virtual SD card system image sudo dd if=/dev/zero of=rootfs.ext3 bs=1M count=32 # Format image sudo mkfs.ext3 rootfs.ext3 #Copy files in the root file system to the mirror sudo mkdir tmpfs # Create a temporary directory sudo mount -t ext3 rootfs.ext3 tmpfs/ -o loop # Mount the rootfs.ext3 image to the tmpfs directory sudo cp -r rootfs/* tmpfs/ # Copy all files in the rootfs directory to the tmpfs directory, that is, copy them to the rootfs.ext3 image sudo umount tmpfs # Unmount the temporarily mounted file system
After the above steps are completed, the rootfs.ext3 image contains all the contents of the rootfs directory. At this time, the Linux root file system has been created. The next step is to use this rootfs.ext3 image. to start the linux kernel
linux startup file
sudo qemu-system-arm -M vexpress-a9 -m 512M -kernel arch/arm/boot/zImage -dtb arch/arm/boot/dts/arm/vexpress-v2p-ca9.dtb -nographic \ -append "root=/dev/mmcblk0 rw console=ttyAMA0" -sd /home/tyustli/code/open_source/busybox/rootfs.ext3
One more sd image is specified here than before.
linux startup log
#0: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 37 input: ImExPS/2 Generic Explorer Mouse as /devices/platform/bus@40000000/bus@40000000:motherboard-bus@40000000/bus@40000000:motherboard-bus@40000000:iofpga@7,00000000/10007000.kmi/serio1/ input/input2 drm-clcd-pl111 10020000.clcd: DVI muxed to daughterboard 1 (core tile) CLCD drm-clcd-pl111 10020000.clcd: initializing Versatile Express PL111 EXT4-fs (mmcblk0): mounting ext3 file system using the ext4 subsystem EXT4-fs (mmcblk0): mounted filesystem b28f1697-44d3-4ac5-879c-fffa4116c9cc r/w with ordered data mode. Quota mode: disabled. VFS: Mounted root (ext3 filesystem) on device 179:0. Freeing unused kernel image (initmem) memory: 1024K Run /sbin/init as init process random: crng init done can't run '/etc/init.d/rcS': No such file or directory Please press Enter to activate this console. ~ # drm-clcd-pl111 10020000.clcd: DVI muxed to daughterboard 1 (core tile) CLCD drm-clcd-pl111 10020000.clcd: initializing Versatile Express PL111 amba 1000f000.wdt: deferred probe pending amba 10020000.clcd: deferred probe pending amba 100e0000.memory-controller: deferred probe pending amba 100e1000.memory-controller: deferred probe pending amba 100e5000.watchdog: deferred probe pending i2c 0-0039: deferred probe pending ~ #ls bin lib lost + found usr dev linuxrc sbin ~ #
Error one
can't run '/etc/init.d/rcS': No such file or directory
solve
mkdir etc cd etc mkdir init.d cd init.d rcS chmod 777rcS # Write content to the file cat >rcS <<EOF #!/bin/sh ATH=/sbin:/bin:/usr/sbin:/usr/bin LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/lib:/usr/lib export PATH LD_LIBRARY_PATH runlevel mount -a mkdir /dev/pts mount -t devpts devpts /dev/pts mdev -s EOF
Error two
can't run '/etc/init.d/rcS': Permission denied
solve
chmod 777 rcS
Create the file /etc/init.d/rcS and be sure to give it executable permission in the future!
Error three
mount: can't read '/etc/fstab': No such file or directory /etc/init.d/rcS: line 8: can't create /proc/sys/kernel/hotplug: nonexistent directory mdev: /sys/dev: No such file or directory
solve
cd etc touch fstab # Write content to the file cat > fstab <<EOF #<file system> <mount point> <type> <options><dump><pass> proc /proc proc defaults 00 tmpfs /tmp tmpfs defaults 00 sysfs /sys sysfs defaults 00 EOF
Appendix: Complete script for root file system production
cd rootfs cp -r /home/tyustli/code/open_source/busybox/busybox-1.36.1/_install/* ./ ########################### Copy library files mkdirlib cp -r /home/tyustli/cross_tool/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/lib/* lib/ cp -r /home/tyustli/cross_tool/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/lib/* lib/ # This file is a soft link and needs to be deleted and copied again. ls lib/ld-linux-armhf.so.3 -l rm lib/ld-linux-armhf.so.3 cp /home/tyustli/cross_tool/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/lib/ld-linux-armhf.so.3 lib/ ls lib/ld-linux-armhf.so.3 -l ############################ copy usr library file mkdir usr/lib cp -r /home/tyustli/cross_tool/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/lib/*so* usr/lib/ cp -r /home/tyustli/cross_tool/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/arm-none-linux-gnueabihf/libc/usr/lib/*.a usr/lib/ # Check the library file size du ./lib/ ./usr/lib/ -sh ############################ Create device node mkdirdev cddev sudo mknod -m 666 tty1 c 4 1 sudo mknod -m 666 tty2 c 4 2 sudo mknod -m 666 tty3 c 4 3 sudo mknod -m 666 tty4 c 4 4 sudo mknod -m 666 tty5 c 4 5 sudo mknod -m 666 tty6 c 4 6 #Create a console node sudo mknod -m 666 console c 5 1 #Create an empty node sudo mknod -m 666 null c 1 3 cd ../ mkdir etc mkdir proc mkdir tmp mkdir sys mkdir lib/modules mkdir lib/modules/6.5.7 + cd etc touch fstab # Write content to the file cat > fstab <<EOF #<file system> <mount point> <type> <options><dump><pass> proc /proc proc defaults 00 tmpfs /tmp tmpfs defaults 00 sysfs /sys sysfs defaults 00 EOF touch inittab cat > inittab<rcS < /proc/sys/kernel/hotplug mdev -s EOF cd ../../../ # Generate virtual SD card system image sudo dd if=/dev/zero of=rootfs.ext3 bs=1M count=128 # Format image sudo mkfs.ext3 rootfs.ext3 #Copy files to the image sudo mkdir tmpfs_rootfs sudo mount -t ext3 rootfs.ext3 tmpfs_rootfs/ -o loop sudo cp -r rootfs/* tmpfs_rootfs/ sudo umount tmpfs_rootfs rmdir tmpfs_rootfs # Start kernel sudo qemu-system-arm -M vexpress-a9 -m 512M \ -kernel /home/tyustli/code/open_source/kernel/linux-6.5.7/arch/arm/boot/zImage \ -dtb /home/tyustli/code/open_source/kernel/linux-6.5.7/arch/arm/boot/dts/arm/vexpress-v2p-ca9.dtb -nographic \ -append "root=/dev/mmcblk0 rw console=ttyAMA0" \ -sd /home/tyustli/code/open_source/busybox/rootfs.ext3
Linux kernel startup complete log
WARNING: Image format was not specified for '/home/tyustli/code/open_source/busybox/rootfs.ext3' and probing guessed raw.
Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
Specify the 'raw' format explicitly to remove the restrictions.
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
Booting Linux on physical CPU 0x0
Linux version 6.5.7 (tyustli@tyustli-machine) (arm-none-linux-gnueabihf-gcc (GNU Toolchain for the A-profile Architecture 10.3-2021.07 (arm-10.29)) 10.3.1 20210621, GNU ld (GNU Toolchain for the A-profile Architecture 10.3-2021.07 (arm-10.29)) 2.36.1.20210621) #3 SMP Sun Oct 15 20:44:33 CST 2023
CPU: ARMv7 Processor [410fc090] revision 0 (ARMv7), cr=10c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
OF: fdt: Machine model: V2P-CA9
Memory policy: Data cache writeback
Reserved memory: created DMA memory pool at 0x4c000000, size 8 MiB
OF: reserved mem: initialized node vram@4c000000, compatible id shared-dma-pool
OF: reserved mem: 0x4c000000..0x4c7fffff (8192 KiB) nomap non-reusable vram@4c000000
cma: Reserved 16 MiB at 0x7f000000
Zone ranges:
Normal [mem 0x0000000060000000-0x000000007fffffff]
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000060000000-0x000000007fffffff]
Initmem setup node 0 [mem 0x0000000060000000-0x000000007fffffff]
CPU: All CPU(s) started in SVC mode.
percpu: Embedded 16 pages/cpu s34516 r8192 d22828 u65536
Kernel command line: root=/dev/mmcblk0 rw console=ttyAMA0
printk: log_buf_len individual max cpu contribution: 4096 bytes
printk: log_buf_len total cpu_extra contributions: 12288 bytes
printk: log_buf_len min size: 16384 bytes
printk: log_buf_len: 32768 bytes
printk: early log buf free: 14824(90%)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
Built 1 zonelists, mobility grouping on. Total pages: 130048
mem auto-init: stack:off, heap alloc:off, heap free:off
Memory: 488696K/524288K available (9216K kernel code, 685K rwdata, 2052K rodata, 1024K init, 178K bss, 19208K reserved, 16384K cma-reserved)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
trace event string verifier disabled
rcu: Hierarchical RCU implementation.
rcu: RCU event tracing is enabled.
rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4.
rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
GIC CPU mask not found - kernel will fail to boot.
GIC CPU mask not found - kernel will fail to boot.
L2C: platform modifies aux control register: 0x02020000 -> 0x02420000
L2C: DT/platform modifies aux control register: 0x02020000 -> 0x02420000
L2C-310 enabling early BRESP for Cortex-A9
L2C-310 full line of zeros enabled for Cortex-A9
L2C-310 dynamic clock gating disabled, standby mode disabled
L2C-310 cache controller enabled, 8 ways, 128 kB
L2C-310: CACHE_ID 0x410000c8, AUX_CTRL 0x46420001
rcu: srcu_init: Setting srcu_struct sizes based on contention.
sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
clocksource: arm,sp804: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275 ns
smp_twd: clock not found -2
Console: color dummy device 80x30
Calibrating local timer... 90.94MHz.
Calibrating delay loop... 489.06 BogoMIPS (lpj=2445312)
CPU: Testing write buffer coherency: ok
CPU0: Specter v2: using BPIALL workaround
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0x60100000 - 0x60100060
rcu: Hierarchical SRCU implementation.
rcu: Max phase no-delay instances is 1000.
smp: Bringing up secondary CPUs ...
smp: Brought up 1 node, 1 CPU
SMP: Total of 1 processors activated (489.06 BogoMIPS).
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 0
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
futex hash table entries: 1024 (order: 4, 65536 bytes, linear)
NET: Registered PF_NETLINK/PF_ROUTE protocol family
DMA: preallocated 256 KiB pool for atomic coherent allocations
cpuidle: using governor ladder
hw-breakpoint: debug architecture 0x4 unsupported.
Serial: AMBA PL011 UART driver
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
i2c 0-0039: Fixed dependency cycle(s) with /bus@40000000/motherboard-bus@40000000/iofpga@7,00000000/clcd@1f000/port/endpoint
i2c 0-0039: Fixed dependency cycle(s) with /clcd@10020000/port/endpoint
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <[email protected]>
PTP clock support registered
Advanced Linux Sound Architecture Driver Initialized.
clocksource: Switched to clocksource arm,sp804
NET: Registered PF_INET protocol family
IP idents hash table entries: 8192 (order: 4, 65536 bytes, linear)
tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 bytes, linear)
Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
TCP established hash table entries: 4096 (order: 2, 16384 bytes, linear)
TCP bind hash table entries: 4096 (order: 4, 65536 bytes, linear)
TCP: Hash tables configured (established 4096 bind 4096)
UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
NET: Registered PF_UNIX/PF_LOCAL protocol family
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp-with-tls transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
hw perfevents: enabled with armv7_cortex_a9 PMU driver, 5 counters available
workingset: timestamp_bits=30 max_order=17 bucket_order=0
squashfs: version 4.0 (2009/01/31) Phillip Lougher
jffs2: version 2.2. (NAND) ? 2001-2006 Red Hat, Inc.
9p: Installing v9fs 9p2000 file system support
io scheduler mq-deadline registered
io scheduler kyber registered
io scheduler bfq registered
OF: graph: no port node found in /bus@40000000/motherboard-bus@40000000/iofpga@7,00000000/i2c@16000/dvi-transmitter@60
sii902x 0-0060: supply iovcc not found, using dummy regulator
sii902x 0-0060: supply cvcc12 not found, using dummy regulator
simple-pm-bus bus@40000000:motherboard-bus@40000000:iofpga@7,00000000: Failed to create device link (0x180) with dcc:tcrefclk
simple-pm-bus bus@40000000:motherboard-bus@40000000:iofpga@7,00000000: Failed to create device link (0x180) with dcc:tcrefclk
physmap-flash 40000000.flash: physmap platform flash device: [mem 0x40000000-0x43ffffff]
40000000.flash: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000000 Chip ID 0x000000
Intel/Sharp Extended Query Table at 0x0031
Using buffer write method
physmap-flash 40000000.flash: physmap platform flash device: [mem 0x44000000-0x47ffffff]
40000000.flash: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000000 Chip ID 0x000000
Intel/Sharp Extended Query Table at 0x0031
Using buffer write method
Concatenating MTD devices:
(0): "40000000.flash"
(1): "40000000.flash"
into device "40000000.flash"
physmap-flash 48000000.psram: physmap platform flash device: [mem 0x48000000-0x49ffffff]
smsc911x 4e000000.ethernet eth0: MAC Address: 52:54:00:12:34:56
isp1760 4f000000.usb: isp1760 bus width: 32, oc: digital
isp1760 4f000000.usb: NXP ISP1760 USB Host Controller
isp1760 4f000000.usb: new USB bus registered, assigned bus number 1
isp1760 4f000000.usb: Scratch test failed. 0x00000000
isp1760 4f000000.usb: can't setup: -19
isp1760 4f000000.usb: USB bus 1 deregistered
usbcore: registered new interface driver usb-storage
rtc-pl031 10017000.rtc: registered as rtc0
rtc-pl031 10017000.rtc: setting system clock to 2023-10-25T13:07:54 UTC (1698239274)
mmci-pl18x 10005000.mmci: Got CD GPIO
mmci-pl18x 10005000.mmci: Got WP GPIO
mmci-pl18x 10005000.mmci: mmc0: PL181 manf 41 rev0 at 0x10005000 irq 35,36 (pio)
ledtrig-cpu: registered to indicate activity on CPUs
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
input: AT Raw Set 2 keyboard as /devices/platform/bus@40000000/bus@40000000:motherboard-bus@40000000/bus@40000000:motherboard-bus@40000000:iofpga@7,00000000/10006000.kmi/serio0/input /input0
mmc0: new SD card at address 4567
mmcblk0: mmc0:4567 QEMU! 32.0 MiB
aaci-pl041 10004000.aaci: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 37
aaci-pl041 10004000.aaci: FIFO 512 entries
NET: Registered PF_PACKET protocol family
9pnet: Installing 9P2000 support
Registering SWP/SWPB emulation handler
10009000.serial: ttyAMA0 at MMIO 0x10009000 (irq = 38, base_baud = 0) is a PL011 rev1
printk: console [ttyAMA0] enabled
1000a000.serial: ttyAMA1 at MMIO 0x1000a000 (irq = 39, base_baud = 0) is a PL011 rev1
1000b000.serial: ttyAMA2 at MMIO 0x1000b000 (irq = 40, base_baud = 0) is a PL011 rev1
1000c000.serial: ttyAMA3 at MMIO 0x1000c000 (irq = 41, base_baud = 0) is a PL011 rev1
drm-clcd-pl111 1001f000.clcd: assigned reserved memory node vram@4c000000
drm-clcd-pl111 1001f000.clcd: using device-specific reserved memory
drm-clcd-pl111 1001f000.clcd: core tile graphics present
drm-clcd-pl111 1001f000.clcd: this device will be deactivated
drm-clcd-pl111 1001f000.clcd: Versatile Express init failed - -19
drm-clcd-pl111 10020000.clcd: DVI muxed to daughterboard 1 (core tile) CLCD
drm-clcd-pl111 10020000.clcd: initializing Versatile Express PL111
drm-clcd-pl111 10020000.clcd: DVI muxed to daughterboard 1 (core tile) CLCD
drm-clcd-pl111 10020000.clcd: initializing Versatile Express PL111
clk: Disabling unused clocks
ALSA device list:
#0: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 37
input: ImExPS/2 Generic Explorer Mouse as /devices/platform/bus@40000000/bus@40000000:motherboard-bus@40000000/bus@40000000:motherboard-bus@40000000:iofpga@7,00000000/10007000.kmi/serio1/ input/input2
drm-clcd-pl111 10020000.clcd: DVI muxed to daughterboard 1 (core tile) CLCD
drm-clcd-pl111 10020000.clcd: initializing Versatile Express PL111
EXT4-fs (mmcblk0): mounting ext3 file system using the ext4 subsystem
EXT4-fs (mmcblk0): recovery complete
EXT4-fs (mmcblk0): mounted filesystem dee5646e-fd03-47fb-9a70-e1714f5b4c73 r/w with ordered data mode. Quota mode: disabled.
VFS: Mounted root (ext3 filesystem) on device 179:0.
Freeing unused kernel image (initmem) memory: 1024K
Run /sbin/init as init process
random: crng init done
mkdir: can't create directory '/dev/pts': File exists
Please press Enter to activate this console. drm-clcd-pl111 10020000.clcd: DVI muxed to daughterboard 1 (core tile) CLCD
drm-clcd-pl111 10020000.clcd: initializing Versatile Express PL111
amba 1000f000.wdt: deferred probe pending
amba 10020000.clcd: deferred probe pending
amba 100e0000.memory-controller: deferred probe pending
amba 100e1000.memory-controller: deferred probe pending
amba 100e5000.watchdog: deferred probe pending
i2c 0-0039: deferred probe pending
refer to
- https://zhuanlan.zhihu.com/p/112128390