ZYNQ_LINUX的根文件系统设置为QSPI_FLASH，JFFS2。
目录
- 一、问题
- 二、解决办法
- 1.创建工程
- 2.配置参数
- 3.编译
- 3.打包
- 4.下载
- 三、附录（开机启动信息）
一、问题
看下面这个链接，出现的问题和我一样。
当把根文件系统设置为 INITRAMFS 是好的，改为JFFS2就有问题。
https://forums.xilinx.com/t5/Embedded-Linux/Modifying-filesystem-Petalinux/td-p/869056
MTD: MTD device with name "jffs2" not found.
VFS: Cannot open root device "mtd:jffs2" or unknown-block(0,0): error -2
Please append a correct "root=" boot option; here are the available partitions:
0100 16384 ram0 (driver?)
0101 16384 ram1 (driver?)
0102 16384 ram2 (driver?)
0103 16384 ram3 (driver?)
0104 16384 ram4 (driver?)
0105 16384 ram5 (driver?)
0106 16384 ram6 (driver?)
0107 16384 ram7 (driver?)
0108 16384 ram8 (driver?)
0109 16384 ram9 (driver?)
010a 16384 ram10 (driver?)
010b 16384 ram11 (driver?)
010c 16384 ram12 (driver?)
010d 16384 ram13 (driver?)
010e 16384 ram14 (driver?)
010f 16384 ram15 (driver?)
1f00 5120 mtdblock0 (driver?)
1f01 128 mtdblock1 (driver?)
1f02 10752 mtdblock2 (driver?)
1f03 16768 mtdblock3 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
CPU0: stopping
二、解决办法
在zedboard上，重新开始搭建一个从QSPI_FLASH启动，根文件系统为JFFS2的LINUX系统。
1.创建工程
petalinux-create --type project --template zynq --name zedboard_jffs2
2.配置参数
petalinux-config --get-hw-description ../linux_base.sdk
按下面的配置，未提到的都保持默认。
Image Packaging Configuration中：
Root filesystem type —>选择JFFS2类型
擦除块大小选择64KB
在Yocto Settings中：
勾选Enable Debug Tweaks，可以取消每次开机串口终端输入用户名密码。
FLASH分区设置：
partition@0x00000000 {
label = "boot";
reg = <0x00000000 0x00500000>;
};
partition@0x00500000 {
label = "bootenv";
reg = <0x00500000 0x00020000>;
};
partition@0x00520000 {
label = "kernel";
reg = <0x00520000 0x00a80000>;
};
partition@0x00fa0000 {
label = "jffs2";
reg = <0x00fa0000 0x00800000>;
};
Advanced bootable images storage Settings中：
boot image settings —>选择primary flash
uboot-env—>选择flash
kernel image settings —>选择primary flash
rootfs—>选择flash
dtb image—>选择from boot image
3.编译
petalinux-build
3.打包
示例：
petalinux-package --boot --u-boot --kernel --add images/linux/rootfs.jffs2 --offset <partition offset given for jffs2>
实际使用：
petalinux-package --boot --fsbl ./images/linux/zynq_fsbl.elf --fpga --u-boot --kernel --add images/linux/rootfs.jffs2 --offset 0x00fa0000 --force
4.下载
使用xilinx sdk下载。
果然遇到问题。
jffs2: Node at 0x0000ff40 with length 0x00000994 would run over the end of the erase block
jffs2: Perhaps the file system was created with the wrong erase size?
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000ff44: 0x0994 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000ff48: 0x790b instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000ff4c: 0x0013 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000ff50: 0x001d instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000ff54: 0x81ed instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000ff5c: 0x7dac instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000ff6c: 0xc000 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000ff70: 0x0950 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000ff74: 0x1000 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000ff78: 0x0006 instead
jffs2: Further such events for this erase block will not be printed
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00010000: 0xac86 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00010004: 0xd244 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00010008: 0x87d5 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0001000c: 0x1426 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00010010: 0xa665 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00010014: 0x913a instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00010018: 0x2db7 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0001001c: 0x4577 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00010020: 0xf857 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00010024: 0x0fc9 instead
jffs2: Further such events for this erase block will not be printed
jffs2: Node at 0x0001facc with length 0x000009df would run over the end of the erase block
jffs2: Perhaps the file system was created with the wrong erase size?
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020000: 0xf5c3 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020004: 0xff8d instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020008: 0xa805 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0002000c: 0xaf88 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020010: 0xb38b instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020014: 0x88e6 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020018: 0x181f instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0002001c: 0x34c4 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020020: 0x80f5 instead
jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020024: 0xfa3c instead
jffs2: Further such events for this erase block will not be printed
jffs2: Node at 0x0002ff98 with length 0x00000a47 would run over the end of the erase block
jffs2: Perhaps the file system was created with the wrong erase size?
解决办法：
把rootfs.tar.gz解压，得到rootfs文件夹，如下图：
再执行如下命令：
mkfs.jffs2 --root=rootfs --eraseblock=0x10000 -p -o rootfs.jffs2
执行完毕，可以得到rootfs.jffs2文件，再重新打包，下载：
petalinux-package --boot --fsbl ./images/linux/zynq_fsbl.elf --u-boot --kernel --add rootfs.jffs2 --offset 0x00fa0000 --force
可以参考这个官方链接。
https://www.xilinx.com/support/answers/71114.html这个是官网链接，可搜索问题。 https://www.xilinx.com/
成功了。
三、附录（开机启动信息）
U-Boot 2017.01 (Dec 16 2019 - 19:34:58 +0800)
Board: Xilinx Zynq
DRAM: ECC disabled 512 MiB
MMC: Card did not respond to voltage select!
sdhci@e0100000 - probe failed: -95
Card did not respond to voltage select!
SF: Detected s25fl256s_64k with page size 256 Bytes, erase size 64 KiB, total 32 MiB
*** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Net: ZYNQ GEM: e000b000, phyaddr ffffffff, interface rgmii-id
eth0: ethernet@e000b000
U-BOOT for zedboard_jffs2
ethernet@e000b000 Waiting for PHY auto negotiation to complete......... TIMEOUT !
Hit any key to stop autoboot: 0
SF: Detected s25fl256s_64k with page size 256 Bytes, erase size 64 KiB, total 32 MiB
device 0 offset 0x520000, size 0xa80000
SF: 11010048 bytes @ 0x520000 Read: OK
## Loading kernel from FIT Image at 10000000 ...
Using 'conf@2' configuration
Verifying Hash Integrity ... OK
Trying 'kernel@0' kernel subimage
Description: Linux Kernel
Type: Kernel Image
Compression: uncompressed
Data Start: 0x100000d4
Data Size: 3747392 Bytes = 3.6 MiB
Architecture: ARM
OS: Linux
Load Address: 0x00008000
Entry Point: 0x00008000
Hash algo: sha1
Hash value: 78d8b38c24d53bc15e925732737d6831e84b966b
Verifying Hash Integrity ... sha1+ OK
## Loading fdt from FIT Image at 10000000 ...
Using 'conf@2' configuration
Trying 'fdt@0' fdt subimage
Description: Flattened Device Tree blob
Type: Flat Device Tree
Compression: uncompressed
Data Start: 0x10393008
Data Size: 13892 Bytes = 13.6 KiB
Architecture: ARM
Hash algo: sha1
Hash value: 125d358c876ebc5efbd99d0950fbf4600dd33af0
Verifying Hash Integrity ... sha1+ OK
Booting using the fdt blob at 0x10393008
Loading Kernel Image ... OK
Loading Device Tree to 07ff9000, end 07fff643 ... OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
Booting Linux on physical CPU 0x0
Linux version 4.9.0-xilinx-v2017.4 (alinx@ubuntu) (gcc version 6.2.1 20161016 (Linaro GCC 6.2-2016.11) ) #3 SMP PREEMPT Mon Dec 16 19:34:11 CST 2019
CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=18c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
OF: fdt:Machine model: xlnx,zynq-7000
bootconsole [earlycon0] enabled
cma: Reserved 16 MiB at 0x1f000000
Memory policy: Data cache writealloc
percpu: Embedded 14 pages/cpu @debca000 s25932 r8192 d23220 u57344
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048
Kernel command line: console=ttyPS0,115200 earlyprintk root=mtd:jffs2 rw rootfstype=jffs2
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: 493036K/524288K available (6144K kernel code, 200K rwdata, 1460K rodata, 1024K init, 229K bss, 14868K reserved, 16384K cma-reserved, 0K highmem)
Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
vmalloc : 0xe0800000 - 0xff800000 ( 496 MB)
lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
.text : 0xc0008000 - 0xc0700000 (7136 kB)
.init : 0xc0900000 - 0xc0a00000 (1024 kB)
.data : 0xc0a00000 - 0xc0a32000 ( 200 kB)
.bss : 0xc0a32000 - 0xc0a6b698 ( 230 kB)
Preemptible hierarchical RCU implementation.
Build-time adjustment of leaf fanout to 32.
RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
RCU: Adjusting geometry for rcu_fanout_leaf=32, nr_cpu_ids=2
NR_IRQS:16 nr_irqs:16 16
efuse mapped to e0800000
slcr mapped to e0802000
L2C: platform modifies aux control register: 0x72360000 -> 0x72760000
L2C: DT/platform modifies aux control register: 0x72360000 -> 0x72760000
L2C-310 erratum 769419 enabled
L2C-310 enabling early BRESP for Cortex-A9
L2C-310 full line of zeros enabled for Cortex-A9
L2C-310 ID prefetch enabled, offset 1 lines
L2C-310 dynamic clock gating enabled, standby mode enabled
L2C-310 cache controller enabled, 8 ways, 512 kB
L2C-310: CACHE_ID 0x410000c8, AUX_CTRL 0x76760001
zynq_clock_init: clkc starts at e0802100
Zynq clock init
sched_clock: 64 bits at 333MHz, resolution 3ns, wraps every 4398046511103ns
clocksource: arm_global_timer: mask: 0xffffffffffffffff max_cycles: 0x4ce07af025, max_idle_ns: 440795209040 ns
Switching to timer-based delay loop, resolution 3ns
clocksource: ttc_clocksource: mask: 0xffff max_cycles: 0xffff, max_idle_ns: 537538477 ns
timer #0 at e080a000, irq=17
Console: colour dummy device 80x30
Calibrating delay loop (skipped), value calculated using timer frequency.. 666.66 BogoMIPS (lpj=3333333)
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
CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0x100000 - 0x100058
CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
Brought up 2 CPUs
SMP: Total of 2 processors activated (1333.33 BogoMIPS).
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
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 menu
hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers.
hw-breakpoint: maximum watchpoint size is 4 bytes.
zynq-ocm f800c000.ocmc: ZYNQ OCM pool: 256 KiB @ 0xe0840000
zynq-pinctrl 700.pinctrl: zynq pinctrl initialized
e0001000.serial: ttyPS0 at MMIO 0xe0001000 (irq = 25, base_baud = 3125000) is a xuartps
`▒▒▒Led
console [ttyPS0] enabled
bootconsole [earlycon0] disabled
bootconsole [earlycon0] disabled
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
media: Linux media interface: v0.10
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 <giometti@linux.it>
PTP clock support registered
EDAC MC: Ver: 3.0.0
FPGA manager framework
fpga-region fpga-full: FPGA Region probed
Advanced Linux Sound Architecture Driver Initialized.
clocksource: Switched to clocksource arm_global_timer
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.
hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7 counters available
futex hash table entries: 512 (order: 3, 32768 bytes)
workingset: timestamp_bits=30 max_order=17 bucket_order=0
jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
dma-pl330 f8003000.dmac: Loaded driver for PL330 DMAC-241330
dma-pl330 f8003000.dmac: DBUFF-128x8bytes Num_Chans-8 Num_Peri-4 Num_Events-16
xdevcfg f8007000.devcfg: ioremap 0xf8007000 to e0828000
[drm] Initialized
brd: module loaded
loop: module loaded
m25p80 spi0.0: found s25fl256s1, expected n25q512a
m25p80 spi0.0: s25fl256s1 (32768 Kbytes)
4 ofpart partitions found on MTD device spi0.0
Creating 4 MTD partitions on "spi0.0":
0x000000000000-0x000000500000 : "boot"
0x000000500000-0x000000520000 : "bootenv"
0x000000520000-0x000000fa0000 : "kernel"
0x000000fa0000-0x0000017a0000 : "jffs2"
libphy: Fixed MDIO Bus: probed
CAN device driver interface
libphy: MACB_mii_bus: probed
macb e000b000.ethernet eth0: Cadence GEM rev 0x00020118 at 0xe000b000 irq 27 (00:0a:35:00:1e:53)
Marvell 88E1510 e000b000.etherne:00: attached PHY driver [Marvell 88E1510] (mii_bus:phy_addr=e000b000.etherne:00, irq=-1)
e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-pci: EHCI PCI platform driver
usbcore: registered new interface driver usb-storage
mousedev: PS/2 mouse device common for all mice
i2c /dev entries driver
cdns-wdt f8005000.watchdog: Xilinx Watchdog Timer at e0942000 with timeout 10s
EDAC MC: ECC not enabled
Xilinx Zynq CpuIdle Driver started
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci-pltfm: SDHCI platform and OF driver helper
mmc0: SDHCI controller on e0100000.sdhci [e0100000.sdhci] using ADMA
ledtrig-cpu: registered to indicate activity on CPUs
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
NET: Registered protocol family 10
sit: IPv6, IPv4 and MPLS 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 20161123 t)
can: netlink gateway (rev 20130117) max_hops=1
Registering SWP/SWPB emulation handler
hctosys: unable to open rtc device (rtc0)
of_cfs_init
of_cfs_init: OK
ALSA device list:
No soundcards found.
random: fast init done
random: crng init done
VFS: Mounted root (jffs2 filesystem) on device 31:3.
devtmpfs: mounted
Freeing unused kernel memory: 1024K (c0900000 - c0a00000)
INIT: version 2.88 booting
Starting udev
udevd[702]: starting version 3.2
udevd[703]: starting eudev-3.2
hwclock: can't open '/dev/misc/rtc': No such file or directory
Mon Dec 16 11:35:41 UTC 2019
hwclock: can't open '/dev/misc/rtc': No such file or directory
Starting internet superserver: inetd.
INIT: Entering runlevel: 5
Configuring network interfaces... IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
udhcpc (v1.24.1) started
Sending discover...
Sending discover...
Sending discover...
No lease, forking to background
done.
Starting Dropbear SSH server: dropbear.
hwclock: can't open '/dev/misc/rtc': No such file or directory
Starting syslogd/klogd: done
Starting tcf-agent: OK
root@zedboard_jffs2:~#