在ARM335X的环境下实现NFS加载根文件系统
一直在用ARM335X开发板做项目，用的都是FLASH加载根文件系统的方式。这两天在看TI的SDK升级方面的有关文章都推荐采用
NFS加载根文件系统的方式来进行开发，所以决定在原来的系统上尝试一下。
1. UBUNTU 18.04 虚拟机 NFS 服务器端的设置
1）修改/etc/exports文件如下：
# /etc/exports: the access control list for filesystems which may be exported
# to NFS clients. See exports(5).
#
# Example for NFSv2 and NFSv3:
# /srv/homes hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subtree_check)
#
# Example for NFSv4:
# /srv/nfs4 gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check)
# /srv/nfs4/homes gss/krb5i(rw,sync,no_subtree_check)
#
/home/eagleba/nfs/2000v2_rootfs *(rw,sync,no_root_squash,no_subtree_check)2） 重启NFS服务
sudo /etc/init.d/nfs-kernel-server restart
2. 目标板上UBOOT的修改
uboot上主要需要设置好bootargs, 这里比较容易出错，我改了很多次才正确。主要原因是出错是内核的错误比较简单，每次只是告诉你加载失败，所以这里的配置要反复检查和确认。
最后调试通过的bootargs为：
setenv bootargs console=ttyO0,115200n8 root=/dev/nfs nfsroot=192.168.2.223:/home/eagleba/nfs/2000v2_rootfs,nolock rw ip=192.168.2.125:192.168.2.223:192.168.2.100:255.255.255.0::eth0:off
然后在uboot下输入tftp uImage 加载内核到内存后输入bootm 就会用bootargs的参数来加载根文件系统了。
3 init
根文件系统从NFS加载起来后并没有运行init，所以在根文件的根目录下加了如下的链接
ln -s ./sbin/init init
4 现在系统就可以正常加载了。
U-Boot SPL 2013.01.01 (Aug 02 2017 - 12:01:55)
U-Boot 2013.01.01 (Aug 02 2017 - 12:01:55)
I2C: ready
DRAM: 512 MiB
WARNING: Caches not enabled
NAND: 512 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
Net: cpsw
Press qw to cmdline...Sanway@335x->run eagle_bootcmd
link up on port 0, speed 100, full duplex
Using cpsw device
TFTP from server 192.168.2.223; our IP address is 192.168.2.125
Filename 'uImage'.
Load address: 0x80200000
Loading: #################################################################
######################################T ###########################
#################################################################
#####################T ############################################
#################################################################
#################################################################
#################################################################
#################################################################
############################################
94.7 KiB/s
done
Bytes transferred = 2886152 (2c0a08 hex)
## Booting kernel from Legacy Image at 80200000 ...
Image Name: Linux-3.2.0-SANWAY
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2886088 Bytes = 2.8 MiB
Load Address: 80008000
Entry Point: 80008000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK
Starting kernel ...
[ 0.000000] Linux version 3.2.0-SANWAY (jiang@ubuntu) (gcc version 4.5.3 20110311 (prerelease) (GCC) ) #622 Fri Nov 23 10:06:20 CST 2018
[ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine: am335x_zjzz
[ 0.000000] Memory policy: ECC disabled, Data cache writeback
[ 0.000000] AM335X ES2.1 (sgx neon )
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048
[ 0.000000] Kernel command line: console=ttyO0,115200n8 root=/dev/nfs nfsroot=192.168.2.223:/home/eagleba/nfs/2000v2_rootfs,nolock rw ip=192.168.2.125:192.168.2.223:192.168.2.100:255.255.255.0::eth0:off
[ 0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[ 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: 512MB = 512MB total
[ 0.000000] Memory: 513840k/513840k available, 10448k reserved, 0K highmem
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
[ 0.000000] vmalloc : 0xe0800000 - 0xff000000 ( 488 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
[ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB)
[ 0.000000] .text : 0xc0008000 - 0xc050b000 (5132 kB)
[ 0.000000] .init : 0xc050b000 - 0xc0544000 ( 228 kB)
[ 0.000000] .data : 0xc0544000 - 0xc059bb20 ( 351 kB)
[ 0.000000] .bss : 0xc059bb44 - 0xc05c5dbc ( 169 kB)
[ 0.000000] NR_IRQS:396
[ 0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
[ 0.000000] Total of 128 interrupts on 1 active controller
[ 0.000000] OMAP clockevent source: GPTIMER2 at 24000000 Hz
[ 0.000000] OMAP clocksource: GPTIMER1 at 32768 Hz
[ 0.000000] sched_clock: 32 bits at 32kHz, resolution 30517ns, wraps every 131071999ms
[ 0.000000] Console: colour dummy device 80x30
[ 0.000091] Calibrating delay loop... 718.02 BogoMIPS (lpj=3590144)
[ 0.058929] pid_max: default: 32768 minimum: 301
[ 0.059051] Security Framework initialized
[ 0.059173] Mount-cache hash table entries: 512
[ 0.059539] CPU: Testing write buffer coherency: ok
[ 0.060272] devtmpfs: initialized
[ 0.080291] omap_hwmod: pruss: failed to hardreset
[ 0.081359] print_constraints: dummy:
[ 0.081634] NET: Registered protocol family 16
[ 0.083648] OMAP GPIO hardware version 0.1
[ 0.085815] omap_mux_init: Add partition: #1: core, flags: 0
[ 0.087646] omap_i2c.1: alias fck already exists
[ 0.088714] omap2_mcspi.1: alias fck already exists
[ 0.088928] omap2_mcspi.2: alias fck already exists
[ 0.089447] edma.0: alias fck already exists
[ 0.089447] edma.0: alias fck already exists
[ 0.089477] edma.0: alias fck already exists
[ 0.108703] bio: create slab at 0
[ 0.110595] SCSI subsystem initialized
[ 0.112121] usbcore: registered new interface driver usbfs
[ 0.112396] usbcore: registered new interface driver hub
[ 0.112579] usbcore: registered new device driver usb
[ 0.112884] registerd cppi-dma Intr @ IRQ 17
[ 0.112915] Cppi41 Init Done Qmgr-base(e087a000) dma-base(e0878000)
[ 0.112915] Cppi41 Init Done
[ 0.112945] musb-ti81xx musb-ti81xx: musb0, board_mode=0x11, plat_mode=0x1
[ 0.113250] musb-ti81xx musb-ti81xx: musb1, board_mode=0x11, plat_mode=0x1
[ 0.128997] omap_i2c omap_i2c.1: bus 1 rev2.4.0 at 100 kHz
[ 0.130584] tps65910 1-002d: JTAGREVNUM 0x0
[ 0.132904] print_constraints: VRTC:
[ 0.134338] print_constraints: VIO: at 1500 mV
[ 0.136596] print_constraints: VDD1: 600 <--> 1500 mV at 1262 mV normal
[ 0.138854] print_constraints: VDD2: 600 <--> 1500 mV at 1137 mV normal
[ 0.139862] print_constraints: VDD3: 5000 mV
[ 0.141235] print_constraints: VDIG1: at 1800 mV
[ 0.142639] print_constraints: VDIG2: at 1800 mV
[ 0.144012] print_constraints: VPLL: at 1800 mV
[ 0.145385] print_constraints: VDAC: at 1800 mV
[ 0.146789] print_constraints: VAUX1: at 1800 mV
[ 0.148193] print_constraints: VAUX2: at 3300 mV
[ 0.149566] print_constraints: VAUX33: at 3300 mV
[ 0.150939] print_constraints: VMMC: at 3300 mV
[ 0.151397] tps65910 1-002d: No interrupt support, no core IRQ
[ 0.153411] Switching to clocksource gp timer
[ 0.169952] musb-hdrc: version 6.0, ?dma?, otg (peripheral+host)
[ 0.170104] musb-hdrc musb-hdrc.0: dma type: dma-cppi41
[ 0.170379] MUSB0 controller's USBSS revision = 4ea20800
[ 0.170410] musb0: Enabled SW babble control
[ 0.170898] musb-hdrc musb-hdrc.0: MUSB HDRC host driver
[ 0.170989] musb-hdrc musb-hdrc.0: new USB bus registered, assigned bus number 1
[ 0.171112] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 0.171142] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.171142] usb usb1: Product: MUSB HDRC host driver
[ 0.171173] usb usb1: Manufacturer: Linux 3.2.0-SANWAY musb-hcd
[ 0.171173] usb usb1: SerialNumber: musb-hdrc.0
[ 0.172027] hub 1-0:1.0: USB hub found
[ 0.172088] hub 1-0:1.0: 1 port detected
[ 0.172607] musb-hdrc musb-hdrc.0: USB Host mode controller at e083c000 using DMA, IRQ 18
[ 0.172790] musb-hdrc musb-hdrc.1: dma type: dma-cppi41
[ 0.173095] MUSB1 controller's USBSS revision = 4ea20800
[ 0.173126] musb1: Enabled SW babble control
[ 0.173614] musb-hdrc musb-hdrc.1: MUSB HDRC host driver
[ 0.173675] musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus number 2
[ 0.173767] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
[ 0.173797] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.173797] usb usb2: Product: MUSB HDRC host driver
[ 0.173797] usb usb2: Manufacturer: Linux 3.2.0-SANWAY musb-hcd
[ 0.173828] usb usb2: SerialNumber: musb-hdrc.1
[ 0.174682] hub 2-0:1.0: USB hub found
[ 0.174682] hub 2-0:1.0: 1 port detected
[ 0.175231] musb-hdrc musb-hdrc.1: USB Host mode controller at e083e800 using DMA, IRQ 19
[ 0.175659] NET: Registered protocol family 2
[ 0.175842] IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.176147] TCP established hash table entries: 16384 (order: 5, 131072 bytes)
[ 0.176452] TCP bind hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.176635] TCP: Hash tables configured (established 16384 bind 16384)
[ 0.176635] TCP reno registered
[ 0.176666] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.176666] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.176879] NET: Registered protocol family 1
[ 0.177124] RPC: Registered named UNIX socket transport module.
[ 0.177124] RPC: Registered udp transport module.
[ 0.177154] RPC: Registered tcp transport module.
[ 0.177154] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.177368] NetWinder Floating Point Emulator V0.97 (double precision)
[ 0.197174] exFAT: Version 1.2.9
[ 0.197479] msgmni has been set to 1003
[ 0.200408] alg: No test for stdrng (krng)
[ 0.201141] io scheduler noop registered (default)
[ 0.202178] Serial: 8250/16550 driver, 8 ports, IRQ sharing enabled
[ 0.205047] omap_uart.0: ttyO0 at MMIO 0x44e09000 (irq = 72) is a OMAP UART0
[ 0.894531] console [ttyO0] enabled
[ 0.898834] omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1
[ 0.906707] omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2
[ 0.914520] omap_uart.3: ttyO3 at MMIO 0x481a6000 (irq = 44) is a OMAP UART3
[ 0.922271] omap_uart.4: ttyO4 at MMIO 0x481a8000 (irq = 45) is a OMAP UART4
[ 0.930084] omap_uart.5: ttyO5 at MMIO 0x481aa000 (irq = 46) is a OMAP UART5
[ 0.938354] omap4_rng omap4_rng: OMAP4 Random Number Generator ver. 2.00
[ 0.945526] ker_rw driver, to read/write all registers, V1.00
[ 0.951538] Complite time: Nov 19 2018 13:45:50
[ 0.956634] mdio_ops driver, to read/write all mdio registers, V1.00
[ 0.963256] Complite time: Nov 19 2018 13:45:50
[ 0.977478] brd: module loaded
[ 0.985504] loop: module loaded
[ 0.988861] at24 1-0050: 32768 byte 24c256 EEPROM, writable, 64 bytes/write
[ 1.054290] The board is general purpose EVM in profile 0
[ 1.061309] omap-gpmc omap-gpmc: GPMC revision 6.0
[ 1.066375] Registering NAND on CS0
[ 1.070312] gpmc cpld init.
[ 1.073211] CONFIG_MACH_AM335X_WeeQ_ARM.
[ 1.077331] CONFIG_MACH_AM335X_WeeQ_ARM.
[ 1.081451] CONFIG_MACH_AM335X_WeeQ_ARM.
[ 1.085540] gpmc cs0[1] reg: 0x00000800
[ 1.089538] gpmc cs0[2] reg: 0x00050500
[ 1.093536] gpmc cs0[3] reg: 0x00050401
[ 1.097534] gpmc cs0[4] reg: 0x04010601
[ 1.101531] gpmc cs0[5] reg: 0x00070909
[ 1.105560] gpmc cs0[6] reg: 0x04000f80
[ 1.109527] gpmc cs0[7] reg: 0x00000f48
[ 1.113525] gpmc cs0, base: 0x08000000, size: 0x01000000
[ 1.119079]
[ 1.120635] gpmc cs1[1] reg: 0x00611001
[ 1.124633] gpmc cs1[2] reg: 0x00121000
[ 1.128631] gpmc cs1[3] reg: 0x00040401
[ 1.132629] gpmc cs1[4] reg: 0x11061006
[ 1.136627] gpmc cs1[5] reg: 0x020f1212
[ 1.140625] gpmc cs1[6] reg: 0x0f070080
[ 1.144622] gpmc cs1[7] reg: 0x00000050
[ 1.148620] gpmc cs1, base: 0x10000000, size: 0x10000000
[ 1.154174]
[ 1.155731] gpmc cs2[1] reg: 0x00611001
[ 1.159698] gpmc cs2[2] reg: 0x00121000
[ 1.163696] gpmc cs2[3] reg: 0x00040401
[ 1.167724] gpmc cs2[4] reg: 0x11061006
[ 1.171691] gpmc cs2[5] reg: 0x020f1212
[ 1.175720] gpmc cs2[6] reg: 0x0f070080
[ 1.179718] gpmc cs2[7] reg: 0x00000f41
[ 1.183685] gpmc cs2, base: 0x01000000, size: 0x01000000
[ 1.189239]
[ 1.190795] gpmc cs3[1] reg: 0x00611001
[ 1.194793] gpmc cs3[2] reg: 0x00121000
[ 1.198791] gpmc cs3[3] reg: 0x00040401
[ 1.202789] gpmc cs3[4] reg: 0x11061006
[ 1.206787] gpmc cs3[5] reg: 0x020f1212
[ 1.210784] gpmc cs3[6] reg: 0x0f070080
[ 1.214782] gpmc cs3[7] reg: 0x00000f42
[ 1.218780] gpmc cs3, base: 0x02000000, size: 0x01000000
[ 1.224334]
[ 1.225860] GPMC_CONFIG 0x210.
[ 1.229522] omap_hsmmc.0: alias fck already exists
[ 1.235900] Detected MACID=74:e1:82:b8:25:c6
[ 1.241302] cpsw: Detected MACID = 74:e1:82:b8:25:c8
[ 1.247131] rtl8211 reset.
[ 1.275848] registered am33xx_sr device
[ 1.282012] omap2-nand driver initializing
[ 1.286590] nand maf_id=c2, dev_id=dc
[ 1.290466] ONFI flash detected
[ 1.293884] ONFI param page 0 valid
[ 1.297546] NAND device: Manufacturer ID: 0xc2, Chip ID: 0xdc (Unknown MX30LF4G18AC)
[ 1.305999] Creating 9 MTD partitions on "omap2-nand.0":
[ 1.311553] 0x000000000000-0x000000020000 : "SPL"
[ 1.317932] 0x000000020000-0x000000040000 : "SPL.backup1"
[ 1.324798] 0x000000040000-0x000000060000 : "SPL.backup2"
[ 1.331573] 0x000000060000-0x000000080000 : "SPL.backup3"
[ 1.338470] 0x000000080000-0x000000260000 : "U-Boot"
[ 1.345581] 0x000000260000-0x000000280000 : "U-Boot Env"
[ 1.352325] 0x000000280000-0x000000780000 : "Kernel"
[ 1.360748] 0x000000780000-0x000008780000 : "File System"
[ 1.420532] 0x000008780000-0x000020000000 : "App"
[ 1.583465] CAN device driver interface
[ 1.587524] CAN bus driver for Bosch D_CAN controller 1.0
[ 1.634094] davinci_mdio davinci_mdio.0: davinci mdio revision 1.6
[ 1.640533] davinci_mdio davinci_mdio.0: detected phy mask fffffffc
[ 1.647918] davinci_mdio.0: probed
[ 1.651489] davinci_mdio davinci_mdio.0: phy[0]: device 0:00, driver RTL821x Gigabit Ethernet
[ 1.660400] davinci_mdio davinci_mdio.0: phy[1]: device 0:01, driver RTL821x Gigabit Ethernet
[ 1.669433] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.676422] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.683044] Initializing USB Mass Storage driver...
[ 1.688446] usbcore: registered new interface driver usb-storage
[ 1.694732] USB Mass Storage support registered.
[ 1.700073] mousedev: PS/2 mouse device common for all mice
[ 1.706695] rtc-pcf8563 1-0051: chip found, driver version 0.4.3
[ 1.714569] rtc-pcf8563 1-0051: low voltage detected, date/time is not reliable.
[ 1.722717] rtc-pcf8563 1-0051: rtc core: registered rtc-pcf8563 as rtc0
[ 1.729919] i2c /dev entries driver
[ 1.736022] OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec
[ 1.744567] cpuidle: using governor ladder
[ 1.749298] cpuidle: using governor menu
[ 1.758178] usbcore: registered new interface driver usbhid
[ 1.763977] usbhid: USB HID core driver
[ 1.768280] TCP cubic registered
[ 1.771667] NET: Registered protocol family 17
[ 1.776336] can: controller area network core (rev 20090105 abi 8)
[ 1.782928] NET: Registered protocol family 29
[ 1.787597] can: raw protocol (rev 20090105)
[ 1.792022] can: broadcast manager protocol (rev 20090105 t)
[ 1.798004] Registering the dns_resolver key type
[ 1.803009] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
[ 1.811004] ThumbEE CPU extension supported.
[ 1.815521] mux: Failed to setup hwmod io irq -22
[ 1.821105] Power Management for AM33XX family
[ 1.825988] Trying to load am335x-pm-firmware.bin (60 secs timeout)
[ 1.832641] Copied the M3 firmware to UMEM
[ 1.837005] Cortex M3 Firmware Version = 0x181
[ 1.843444] create_regulator: VDD1: Failed to create debugfs directory
[ 1.851806] smartreflex smartreflex: am33xx_sr_probe: Driver initialized
[ 1.864532] clock: disabling unused clocks to save power
[ 1.885559] rtc-pcf8563 1-0051: low voltage detected, date/time is not reliable.
[ 1.893310] rtc-pcf8563 1-0051: setting system clock to 2019-08-14 06:12:37 UTC (1565763157)
[ 1.906402] net eth0: CPSW phy found : id is : 0x1cc914
[ 4.909118] PHY: 0:01 - Link is Up - 100/Full
[ 4.934844] IP-Config: Complete:
[ 4.938232] device=eth0, addr=192.168.2.125, mask=255.255.255.0, gw=192.168.2.100,
[ 4.946350] host=192.168.2.125, domain=, nis-domain=(none),
[ 4.952606] bootserver=192.168.2.223, rootserver=192.168.2.223, rootpath=
[ 4.967529] VFS: Mounted root (nfs filesystem) on device 0:14.
[ 4.974090] devtmpfs: mounted
[ 4.977569] Freeing init memory: 228K
INIT: version 2.88 booting
Error opening /dev/fb0: No such file or directory
Starting udev
[ 5.609558] udev[823]: starting version 164
[ 8.970855] rtc-pcf8563 1-0051: low voltage detected, date/time is not reliable.
[ 8.986999] yaffs: dev is 32505864 name is "mtdblock8" rw
[ 8.992706] yaffs: passed flags ""
Starting Bootlog daemon: bootlogd: cannot allocate pseudo tty: No such file or directory
bootlogd.
mount: mounting 192.168.2.223:/home/eagleba/nfs/2000v2_rootfs/ on / failed: Invalid argument
[ 9.679504] rtc-pcf8563 1-0051: low voltage detected, date/time is not reliable.
INIT: Entering runlevel: 5
Starting system message bus: dbus.
Starting telnet daemon.
[ 10.014587] rtc-pcf8563 1-0051: low voltage detected, date/time is not reliable.
Starting syslogd/klogd: done
Error: Module TEST is not currently loaded
rm: can't remove '/dev/fpga': No such file or directory
[ 10.686126] Disabling lock debugging due to kernel taint
[ 10.692352] CS1 old GPMC_CS_CONFIG1 611001
[ 10.696655] CS1 old GPMC_CS_CONFIG6 f070080
[ 10.701019] CS1 new GPMC_CS_CONFIG1 611001
[ 10.705291] CS1 old GPMC_CS_CONFIG6 f0704c4
[ 10.709686] Failed request for GPMC mem for init
[ 10.714477] Got CS1, address = 0
[ 10.717864] GPMC revision 6.0
[ 10.720947] GPMC config 210
[ 10.729827] CS2 old GPMC_CS_CONFIG1 611001
[ 10.734100] CS2 old GPMC_CS_CONFIG6 f070080
[ 10.738525] CS2 new GPMC_CS_CONFIG1 611001
[ 10.742797] CS2 old GPMC_CS_CONFIG6 f0704c4
[ 10.747161] Failed request for GPMC mem for init
[ 10.751983] Got CS2, address = 0x0
[ 10.755554] GPMC revision 6.0
[ 10.758636] GPMC config 210
Error: Module PS_FPGAUpgrad is not currently loaded
rm: can't remove '/dev/PS_FPGA': No such file or directory
[ 11.318389] PS-FPGA Init
Load Binary File Size: 3571462 Bytes.
FPGA COnfig Success.
[ 29.478088] CS1 old GPMC_CS_CONFIG1 611001
[ 29.482391] CS1 old GPMC_CS_CONFIG6 f0704c4
[ 29.486785] CS1 new GPMC_CS_CONFIG1 611001
[ 29.491058] CS1 old GPMC_CS_CONFIG6 f0704c4
[ 29.495422] Got CS1, address = 10000000
[ 29.499450] GPMC revision 6.0
[ 29.502532] GPMC config 210
[ 29.511444] CS2 old GPMC_CS_CONFIG1 611001
[ 29.515716] CS2 old GPMC_CS_CONFIG6 f0704c4
[ 29.520080] CS2 new GPMC_CS_CONFIG1 611001
[ 29.524353] CS2 old GPMC_CS_CONFIG6 f0704c4
[ 29.528717] Got CS2, address = 0x1000000
[ 29.532806] GPMC revision 6.0
[ 29.535888] GPMC config 210
Stopping Bootlog daemon: bootlogd.
_____ _____ _ _
| _ |___ ___ ___ ___ | _ |___ ___ |_|___ ___| |_
| | _| .'| . | . | | __| _| . | | | -_| _| _|
|__|__|_| |__,|_ |___| |__| |_| |___|_| |___|___|_|
|___| |___|
Arago Project http://arago-project.org SWA3300-ZJZZ ttyO0
Arago 2013.02 SWA3300-ZJZZ ttyO0
SWA3300-ZJZZ login: 5 遗留问题
系统起来后还是报了一个错误：
mount: mounting 192.168.2.223:/home/eagleba/nfs/2000v2_rootfs/ on / failed: Invalid argument
但我发现系统运行正常，所以暂时先不管它了。
6 参考文档
NFS挂载失败 https://blog.csdn.net/ltc844139730/article/details/51591941
Linux学习之路——NFS挂载根文件系统 https://blog.csdn.net/qq_24835087/article/details/84578111
目标板通过nfs挂载根文件系统 https://www.cnblogs.com/youthshouting/p/4541727.html
嵌入式linux之NFS启动根文件系统http://blog.sina.com.cn/s/blog_70e0d0a30102uztl.html
从NFS起根文件系统http://blog.chinaunix.net/uid-25737580-id-3979248.html