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--- nfs [2017/08/07 11:54]
1.241.172.144
+++ nfs [2017/08/19 21:45] (current)
1.241.172.144
@@ Line 3: / Line 3: @@
 우선 Server 패키지를 설치해야 한다.
-  $ sudo apt-get install nfs-kernel-server
+  $ sudo apt-get install nfs-kernel-server nfs-common rpcbind
 제공해줄 디렉토리를 하나 생성
@@ Line 11: / Line 11: @@
 /etc/exports 파일을 수정한다.
+{{wiki:atmel_sama5d42:nfs:nfs_1.jpg}}
+설정을 모두 마쳤으면, 재시작!
+  $ sudo service nfs-kernel-server restart
+NFS를 사용하기 위해서 사용하는 포트가 지정된 1개가 아니다.
+그러다보니 방화벽 환경에서 NFS를 사용하게 되면 당연히 문제가 발생한다.
+지금 사용하고 있는 port 현황을 확인해보도록 하자.
+{{wiki:atmel_sama5d42:nfs:nfs_2.jpg}}
+사용할 포트를 등록해보자.
+/etc/services 파일을 수정한다.
+  ...
+  status            4000/tcp                       # rpc.statd tcp port
+  status            4000/udp                       # rpc.statd udp port
+  mountd            4002/tcp                       # mountd tcp port
+  mountd            4002/udp                       # mountd udp port
+  rquotad           4003/tcp                       # rpc.rquotad tcp port
+  rquotad           4003/udp                       # rpc.rquotad udp port
+  ...
+{{wiki:atmel_sama5d42:nfs:nfs_3.jpg}}
+실행 옵션도 수정해주어야 한다.
+/etc/default/nfs-kernel-server 파일 수정
+  ...
+  # RPCMOUNTDOPTS=""
+  RPCMOUNTDOPTS="-p 4002 -g"
+  ...
+{{wiki:atmel_sama5d42:nfs:nfs_4.jpg}}
+다음의 파일을 수정해야 한다.
+만약 없는 경우 새로 생성하면 된다.
+/etc/modprobe.d/options.conf
+  options lockd nlm_udpport=4001 nlm_tcpport=4001
+{{wiki:atmel_sama5d42:nfs:nfs_5.jpg}}
+그리고, 이젠 서비스를 재시작하자.
+  $ sudo service rpcbind restart
+  $ sudo service nfs-kernel-server restart
+이렇게 설정하게 되면 나의 경우
+  /home/stephanos/NFS_VI
+이 폴더가 Network File System으로 연결 된다.
+내가 현재 사용중인 NFS_VI 폴더를 묶은 파일 이다.
+{{wiki:atmel_sama5d42:nfs:NFS_VI.tar}}
+===== NFS로 booting 하는 방법 =====
+SVN 에 올라온 uboot를 컴파일 해서 올리고
+  ==>printenv
+해보면 커맨드들이 나온다.
+  run ???? 의 형태로 이를 실행 시키면 된다.
+그대로 설정을 사용하고 server의 설정을 맞추던지 아니면 uboot의 설정을 변경해서 사용하면 된다.
+나의 경우 아래와 같이 uboot의 설정을 변경해서 사용했다.
+부팅시 로그 이다.
+  RomBOOT
+   Bank Address Offset Bits = 0xB ...
+  Target Board Initialized
+  Enabled 32.768KHz OSC
+  Atmel Boot Strap For VI3.8.7 (2017. 07. 11. (ȭ) 18:08:04 KST)
+  All interrupts redirected to AIC
+  Loading Image Initialized
+  NAND: ONFI flash detected
+  NAND: ONFI para CRC error!
+  NAND: Manufacturer ID: 0x1, Chip ID: 0xda
+  NAND: Enable On-Die ECC
+  NAND : Bits Of ECC = 4
+  NAND : Bits Of Data = 8
+  NAND : Byte Size Of ECC Base = 512
+  NAND : Byte Size Of Spare = 64
+  NAND : Byte Size Of Page = 2048
+  NAND : Number Of Pages In Block = 64
+  NAND : Number Of Blocks In Unit = 1024
+  NAND : Number Of Units In Device = 2
+  NAND: Image: Copy 80000 bytes from 40000 to 26f00000
+  NAND: Done to load image
+  Jump to u-boot
+  U-Boot 2016.03-linux4sam_5.5 (Aug 10 2017 - 18:37:41 +0900)
+  CPU: SAMA5D42
+  Crystal frequency:       12 MHz
+  CPU clock        :      528 MHz
+  Master clock     :      176 MHz
+  I2C:   ready
+  DRAM:  128 MiB
+  NAND:  256 MiB
+  MMC:   mci: 0
+  *** Warning - bad CRC, using default environment
+  In:    serial
+  Out:   serial
+  Err:   serial
+  Net:
+  Warning: gmac0 using random MAC address - 62:03:47:49:cb:f3
+  gmac0, usb_ether
+  Warning: usb_ether (eth1) using random MAC address - 62:03:47:49:cb:f3
+  NAND read: device 0 offset 0x180000, size 0x80000
+bytes read: OK
+  Hit any key to stop autoboot:  5  0
+  => printenv
+  arch=arm
+  baudrate=115200
+  board=sama5d4_vi_base
+  board_name=sama5d4_vi_base
+  boot-nand-nfs=setenv bootargs 'console=ttyS0,115200 root=/dev/nfs rw nfsroot=192.168.28.104:/home/stephanos/NFS_VI ip=192.168.28.28:192.168.28.104:192.168.28.1:255.255.255.0::';nand read 0x21000000 0x200000 0x80000;nand read 0x22000000 0x280000 0x600000;bootz 0x22000000 - 0x21000000
+  boot-nand-ubi=setenv bootargs 'console=ttyS0,115200 earlyprintk mtdparts=atmel_nand:256k(bootstrap)ro,512k(uboot)ro,256K(env),256k(env_redundent),256k(spare),512k(logo),512k(dtb),6M(kernel)ro,-(rootfs) rootfstype=ubifs ubi.mtd=8 root=ubi0:rootfs';nand read 0x21000000 0x200000 0x80000;nand read 0x22000000 0x280000  0x600000;bootz 0x22000000 - 0x21000000
+  boot-tftp-nfs=setenv bootargs 'console=ttyS0,115200 root=/dev/nfs rw nfsroot=192.168.28.104:/home/stephanos/NFS_VI ip=192.168.28.28:192.168.28.104:192.168.28.1:255.255.255.0::';tftp 0x21000000 vi_dt.bin;tftp 0x22000000 zImage.bin;bootz 0x22000000 - 0x21000000
+  boot-tftp-ubi=setenv bootargs 'console=ttyS0,115200 earlyprintk mtdparts=atmel_nand:256k(bootstrap)ro,512k(uboot)ro,256K(env),256k(env_redundent),256k(spare),512k(logo),512k(dtb),6M(kernel)ro,-(rootfs) rootfstype=ubifs ubi.mtd=8 root=ubi0:rootfs';tftp 0x21000000 vi_dt.bin;tftp 0x22000000 zImage.bin;bootz 0x22000000 - 0x21000000
+  bootargs=console=ttyS0,115200 earlyprintk mtdparts=atmel_nand:256k(bootstrap)ro,512k(uboot)ro,256K(env),256k(env_redundent),256k(spare),512k(logo),512k(dtb),6M(kernel)ro,-(rootfs) rootfstype=ubifs ubi.mtd=8 root=ubi0:rootfs
+  bootcmd=nand read 0x21000000 0x200000 0x80000;nand read 0x22000000 0x280000 0x600000;bootz 0x22000000 - 0x21000000
+  bootdelay=5
+  cpu=armv7
+  ethact=gmac0
+  ethaddr=62:03:47:49:cb:f3
+  ipaddr=192.168.28.28
+  preboot=nand read 0x22000000 0x180000 0x80000; bmp display 0x22000000 0 0
+  serverip=192.168.28.100
+  soc=at91
+  target_board_ip=192.168.28.28
+  tftp-write-dt=tftp 0x20000000 vi_dt.bin;nand erase 0x200000 0x80000;nand write 0x20000000 0x200000 $filesize
+  tftp-write-kernel=tftp 0x20000000 zImage.bin;nand erase 0x280000 0x600000;nand write 0x20000000 0x280000 $filesize
+  tftp-write-logo=tftp 0x20000000 logo.bmp;nand erase 0x180000 0x80000;nand write 0x20000000 0x180000 $filesize
+  tftp-write-rootfs=tftp 0x20000000 rootfs_ubi.bin;nand erase 0x880000 0xF780000;nand write 0x20000000 0x880000 $filesize
+  tftp-write-uboot=tftp 0x20000000 u-boot.bin;nand erase 0x40000 0x80000;nand write 0x20000000 0x40000 $filesize
+  tftp_ip=192.168.28.100
+  vendor=atmel
+  Environment size: 2516/262139 bytes
+  =>
+  =>
+위의 설정에 따라
+TFTP를 사용하여 DTB 파일을 NAND에 Write 할때 사용하는 커맨드 예
+  run tftp-write-dt
+TFTP를 사용하여 커널 파일을 NAND에 Write 할때 사용하는 커맨드 예
+  run tftp-write-kernel
+TFTP를 사용하여 logo BMP 파일을 NAND에 Write 할때 사용하는 커맨드 예
+  run tftp-write-logo
+TFTP를 사용하여 rootfs 파일을 NAND에 Write 할때 사용하는 커맨드 예
+  run tftp-write-rootfs
+TFTP를 사용하여 uboot 파일을 NAND에 Write 할때 사용하는 커맨드 예
+  run tftp-write-uboot
+TFTP를 사용하여 kernel과 DTB를  로드하고 NAND에 저장된 rootfs를 이용하여 부팅시 사용하는 커맨드 예
+  run boot-tftp-ubi
+TFTP를 사용하여 kernel과 DTB를 로드하고 NFS의 rootfs를 이용하여 부팅시 사용하는 커맨드 예
+  run boot-tftp-nfs
+NAND에 저장된 kernel, DTB, rootfs를 이용하여 부팅시 사용하는 커맨드 예
+  run boot-nand-ubi
+NAND에 저장된 kernel, DTB를 로드하고 NFS의 rootfs를 이용하여 부팅시 사용하는 커맨드 예
+  run boot-nand-nfs
+실제 TFTP를 사용하여 kernel과 DTB를 로드하고 NFS의 rootfs를 이용하여 부팅하는 로그
+  RomBOOT
+   Bank Address Offset Bits = 0xB ...
+  Target Board Initialized
+  Enabled 32.768KHz OSC
+  Atmel Boot Strap For VI3.8.7 (2017. 07. 11. (ȭ) 18:08:04 KST)
+  All interrupts redirected to AIC
+  Loading Image Initialized
+  NAND: ONFI flash detected
+  NAND: ONFI para CRC error!
+  NAND: Manufacturer ID: 0x1, Chip ID: 0xda
+  NAND: Enable On-Die ECC
+  NAND : Bits Of ECC = 4
+  NAND : Bits Of Data = 8
+  NAND : Byte Size Of ECC Base = 512
+  NAND : Byte Size Of Spare = 64
+  NAND : Byte Size Of Page = 2048
+  NAND : Number Of Pages In Block = 64
+  NAND : Number Of Blocks In Unit = 1024
+  NAND : Number Of Units In Device = 2
+  NAND: Image: Copy 80000 bytes from 40000 to 26f00000
+  NAND: Done to load image
+  Jump to u-boot
+  U-Boot 2016.03-linux4sam_5.5 (Aug 10 2017 - 18:37:41 +0900)
+  CPU: SAMA5D42
+  Crystal frequency:       12 MHz
+  CPU clock        :      528 MHz
+  Master clock     :      176 MHz
+  I2C:   ready
+  DRAM:  128 MiB
+  NAND:  256 MiB
+  MMC:   mci: 0
+  *** Warning - bad CRC, using default environment
+  In:    serial
+  Out:   serial
+  Err:   serial
+  Net:
+  Warning: gmac0 using random MAC address - 62:03:47:49:cb:f3
+  gmac0, usb_ether
+  Warning: usb_ether (eth1) using random MAC address - 62:03:47:49:cb:f3
+  NAND read: device 0 offset 0x180000, size 0x80000
+bytes read: OK
+  Hit any key to stop autoboot:  5  0
+  => printenv
+  arch=arm
+  baudrate=115200
+  board=sama5d4_vi_base
+  board_name=sama5d4_vi_base
+  boot-nand-nfs=setenv bootargs 'console=ttyS0,115200 root=/dev/nfs rw nfsroot=192.168.28.104:/home/stephanos/NFS_VI ip=192.168.28.28:192.168.28.104:192.168.28.1:255.255.255.0::';nand read 0x21000000 0x200000 0x80000;nand read 0x22000000 0x280000 0x600000;bootz 0x22000000 - 0x21000000
+  boot-nand-ubi=setenv bootargs 'console=ttyS0,115200 earlyprintk mtdparts=atmel_nand:256k(bootstrap)ro,512k(uboot)ro,256K(env),256k(env_redundent),256k(spare),512k(logo),512k(dtb),6M(kernel)ro,-(rootfs) rootfstype=ubifs ubi.mtd=8 root=ubi0:rootfs';nand read 0x21000000 0x200000 0x80000;nand read 0x22000000 0x280000  0x600000;bootz 0x22000000 - 0x21000000
+  boot-tftp-nfs=setenv bootargs 'console=ttyS0,115200 root=/dev/nfs rw nfsroot=192.168.28.104:/home/stephanos/NFS_VI ip=192.168.28.28:192.168.28.104:192.168.28.1:255.255.255.0::';tftp 0x21000000 vi_dt.bin;tftp 0x22000000 zImage.bin;bootz 0x22000000 - 0x21000000
+  boot-tftp-ubi=setenv bootargs 'console=ttyS0,115200 earlyprintk mtdparts=atmel_nand:256k(bootstrap)ro,512k(uboot)ro,256K(env),256k(env_redundent),256k(spare),512k(logo),512k(dtb),6M(kernel)ro,-(rootfs) rootfstype=ubifs ubi.mtd=8 root=ubi0:rootfs';tftp 0x21000000 vi_dt.bin;tftp 0x22000000 zImage.bin;bootz 0x22000000 - 0x21000000
+  bootargs=console=ttyS0,115200 earlyprintk mtdparts=atmel_nand:256k(bootstrap)ro,512k(uboot)ro,256K(env),256k(env_redundent),256k(spare),512k(logo),512k(dtb),6M(kernel)ro,-(rootfs) rootfstype=ubifs ubi.mtd=8 root=ubi0:rootfs
+  bootcmd=nand read 0x21000000 0x200000 0x80000;nand read 0x22000000 0x280000 0x600000;bootz 0x22000000 - 0x21000000
+  bootdelay=5
+  cpu=armv7
+  ethact=gmac0
+  ethaddr=62:03:47:49:cb:f3
+  ipaddr=192.168.28.28
+  preboot=nand read 0x22000000 0x180000 0x80000; bmp display 0x22000000 0 0
+  serverip=192.168.28.100
+  soc=at91
+  target_board_ip=192.168.28.28
+  tftp-write-dt=tftp 0x20000000 vi_dt.bin;nand erase 0x200000 0x80000;nand write 0x20000000 0x200000 $filesize
+  tftp-write-kernel=tftp 0x20000000 zImage.bin;nand erase 0x280000 0x600000;nand write 0x20000000 0x280000 $filesize
+  tftp-write-logo=tftp 0x20000000 logo.bmp;nand erase 0x180000 0x80000;nand write 0x20000000 0x180000 $filesize
+  tftp-write-rootfs=tftp 0x20000000 rootfs_ubi.bin;nand erase 0x880000 0xF780000;nand write 0x20000000 0x880000 $filesize
+  tftp-write-uboot=tftp 0x20000000 u-boot.bin;nand erase 0x40000 0x80000;nand write 0x20000000 0x40000 $filesize
+  tftp_ip=192.168.28.100
+  vendor=atmel
+  Environment size: 2516/262139 bytes
+  =>
+  =>
+  => run boot-tftp-nfs
+  gmac0: PHY present at 0
+  gmac0: link up, 100Mbps full-duplex (lpa: 0xcde1)
+  Using gmac0 device
+  TFTP from server 192.168.28.100; our IP address is 192.168.28.28
+  Filename 'vi_dt.bin'.
+  Load address: 0x21000000
+  Loading: *###
+.2 MiB/s
+  done
+  Bytes transferred = 33486 (82ce hex)
+  gmac0: PHY present at 0
+  gmac0: link up, 100Mbps full-duplex (lpa: 0xcde1)
+  Using gmac0 device
+  TFTP from server 192.168.28.100; our IP address is 192.168.28.28
+  Filename 'zImage.bin'.
+  Load address: 0x22000000
+  Loading: *#################################################################
+  	 #################################################################
+  	 #################################################################
+  	 ########################################################
+.6 MiB/s
+  done
+  Bytes transferred = 3681888 (382e60 hex)
+  Kernel image @ 0x22000000 [ 0x000000 - 0x382e60 ]
+  ## Flattened Device Tree blob at 21000000
+     Booting using the fdt blob at 0x21000000
+     Loading Device Tree to 27b06000, end 27b112cd ... OK
+  Starting kernel ...
+  Booting Linux on physical CPU 0x0
+  Linux version 4.9.36 (stephanos@stephanos-VirtualBox) (gcc version 6.2.1 20161016 (Linaro GCC 6.2-2016.11) ) #13 Sat Aug 12 15:15:57 KST 2017
+  CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7), cr=10c53c7d
+  CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
+  OF: fdt:Machine model: Atmel SAMA5D4 VI
+  cma: Failed to reserve 64 MiB
+  Memory policy: Data cache writeback
+  CPU: All CPU(s) started in SVC mode.
+  Built 1 zonelists in Zone order, mobility grouping off.  Total pages: 32512
+  Kernel command line: console=ttyS0,115200 root=/dev/nfs rw nfsroot=192.168.28.104:/home/stephanos/NFS_VI ip=192.168.28.28:192.168.28.104:192.168.28.1:255.255.255.0::
+  PID hash table entries: 512 (order: -1, 2048 bytes)
+  Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
+  Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
+  Memory: 120140K/131072K available (6144K kernel code, 193K rwdata, 1332K rodata, 1024K init, 177K bss, 10932K reserved, 0K cma-reserved)
+  Virtual kernel memory layout:
+      vector  : 0xffff0000 - 0xffff1000   (   4 kB)
+      fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
+      vmalloc : 0xc8800000 - 0xff800000   ( 880 MB)
+      lowmem  : 0xc0000000 - 0xc8000000   ( 128 MB)
+      modules : 0xbf000000 - 0xc0000000   (  16 MB)
+        .text : 0xc0008000 - 0xc0700000   (7136 kB)
+        .init : 0xc0900000 - 0xc0a00000   (1024 kB)
+        .data : 0xc0a00000 - 0xc0a30560   ( 194 kB)
+         .bss : 0xc0a30560 - 0xc0a5c9b8   ( 178 kB)
+  NR_IRQS:16 nr_irqs:16 16
+  L2C-310 ID prefetch enabled, offset 2 lines
+  L2C-310 dynamic clock gating enabled, standby mode enabled
+  L2C-310 cache controller enabled, 8 ways, 128 kB
+  L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
+  clocksource: pit: mask: 0x7ffffff max_cycles: 0x7ffffff, max_idle_ns: 10859434279 ns
+  sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
+  Console: colour dummy device 80x30
+  Calibrating delay loop... 351.43 BogoMIPS (lpj=1757184)
+  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
+  Setting up static identity map for 0x20100000 - 0x20100058
+  devtmpfs: initialized
+  VFP support v0.3: implementor 41 architecture 2 part 30 variant 5 rev 1
+  clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
+  futex hash table entries: 256 (order: -1, 3072 bytes)
+  pinctrl core: initialized pinctrl subsystem
+  NET: Registered protocol family 16
+  DMA: preallocated 256 KiB pool for atomic coherent allocations
+  cpuidle: using governor ladder
+  AT91: Detected SoC family: sama5d4
+  AT91: Detected SoC: sama5d42, revision 0
+  gpio-at91 fc06a000.gpio: at address c8859000
+  gpio-at91 fc06b000.gpio: at address c885b000
+  gpio-at91 fc06c000.gpio: at address c885d000
+  gpio-at91 fc068000.gpio: at address c8871000
+  gpio-at91 fc06d000.gpio: at address c8873000
+  pinctrl-at91 ahb:apb:pinctrl@fc06a000: initialized AT91 pinctrl driver
+  clocksource: tcb_clksrc: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 173750949719 ns
+  at_xdmac f0004000.dma-controller: 16 channels, mapped at 0xc8879000
+  at_xdmac f0014000.dma-controller: 16 channels, mapped at 0xc887b000
+  VDD MCI1: supplied by VCC 3V3
+  SCSI subsystem initialized
+  usbcore: registered new interface driver usbfs
+  usbcore: registered new interface driver hub
+  usbcore: registered new device driver usb
+  at91_i2c f8014000.i2c: using dma0chan0 (tx) and dma0chan1 (rx) for DMA transfers
+  at91_i2c f8014000.i2c: AT91 i2c bus driver (hw version: 0x502).
+  Bluetooth: Core ver 2.22
+  NET: Registered protocol family 31
+  Bluetooth: HCI device and connection manager initialized
+  Bluetooth: HCI socket layer initialized
+  Bluetooth: L2CAP socket layer initialized
+  Bluetooth: SCO socket layer initialized
+  clocksource: Switched to clocksource tcb_clksrc
+  NET: Registered protocol family 2
+  TCP established hash table entries: 1024 (order: 0, 4096 bytes)
+  TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
+  TCP: Hash tables configured (established 1024 bind 1024)
+  UDP hash table entries: 256 (order: 0, 4096 bytes)
+  UDP-Lite hash table entries: 256 (order: 0, 4096 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.
+  workingset: timestamp_bits=30 max_order=15 bucket_order=0
+  NFS: Registering the id_resolver key type
+  Key type id_resolver registered
+  Key type id_legacy registered
+  io scheduler noop registered (default)
+  backlight supply power not found, using dummy regulator
+  f8004000.serial: ttyS5 at MMIO 0xf8004000 (irq = 25, base_baud = 5500000) is a ATMEL_SERIAL
+  f802c000.serial: ttyS3 at MMIO 0xf802c000 (irq = 29, base_baud = 5500000) is a ATMEL_SERIAL
+  f8030000.serial: ttyS4 at MMIO 0xf8030000 (irq = 30, base_baud = 5500000) is a ATMEL_SERIAL
+  fc008000.serial: ttyS2 at MMIO 0xfc008000 (irq = 32, base_baud = 5500000) is a ATMEL_SERIAL
+  fc00c000.serial: ttyS0 at MMIO 0xfc00c000 (irq = 33, base_baud = 5500000) is a ATMEL_SERIAL
+  console [ttyS0] enabled
+  fc010000.serial: ttyS1 at MMIO 0xfc010000 (irq = 34, base_baud = 5500000) is a ATMEL_SERIAL
+  [drm] Initialized
+  panel supply power not found, using dummy regulator
+  brd: module loaded
+  loop: module loaded
+  nbd: registered device at major 43
+  [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
+  [drm] No driver support for vblank timestamp query.
+  atmel-hlcdc-display-controller atmel-hlcdc-dc: failed to create HLCDC outputs: -517
+  atmel-hlcdc-display-controller atmel-hlcdc-dc: failed to initialize mode setting
+  atmel_nand_nfc 90000000.nfc: NFC is probed.
+  atmel_nand 80000000.nand: Using dma0chan2 for DMA transfers.
+  nand: device found, Manufacturer ID: 0x01, Chip ID: 0xda
+  nand: AMD/Spansion S34ML02G2
+  nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 128
+  atmel_nand 80000000.nand: Use On Flash BBT
+  atmel_nand 80000000.nand: Cannot get PMECC lookup table offset, will build a lookup table in runtime.
+  atmel_nand 80000000.nand: minimum ECC: 4 bits in 512 bytes
+  atmel_nand 80000000.nand: Initialize PMECC params, cap: 4, sector: 512
+  atmel_nand 80000000.nand: Using NFC Sram read and write
+  Bad block table found at page 131008, version 0x01
+  Bad block table found at page 130944, version 0x01
+ofpart partitions found on MTD device atmel_nand
+  Creating 6 MTD partitions on "atmel_nand":
+x000000000000-0x000000040000 : "at91bootstrap"
+x000000040000-0x0000000c0000 : "bootloader"
+x0000000c0000-0x000000180000 : "bootloader env"
+x000000180000-0x000000200000 : "device tree"
+x000000200000-0x000000800000 : "kernel"
+x000000800000-0x000010000000 : "rootfs"
+  atmel_spi fc018000.spi: version: 0x221
+  atmel_spi fc018000.spi: Using dma0chan3 (tx) and dma0chan4 (rx) for DMA transfers
+  atmel_spi fc018000.spi: Atmel SPI Controller at 0xfc018000 (irq 35)
+  libphy: Fixed MDIO Bus: probed
+  libphy: MACB_mii_bus: probed
+  Micrel KSZ8081 or KSZ8091 f8020000.etherne:01: attached PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=f8020000.etherne:01, irq=81)
+  macb f8020000.ethernet eth0: Cadence GEM rev 0x00020120 at 0xf8020000 irq 28 (62:03:47:49:cb:f3)
+  ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
+  ehci-atmel: EHCI Atmel driver
+  atmel-ehci 600000.ehci: EHCI Host Controller
+  atmel-ehci 600000.ehci: new USB bus registered, assigned bus number 1
+  atmel-ehci 600000.ehci: irq 18, io mem 0x00600000
+  atmel-ehci 600000.ehci: USB 2.0 started, EHCI 1.00
+  usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
+  usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
+  usb usb1: Product: EHCI Host Controller
+  usb usb1: Manufacturer: Linux 4.9.36 ehci_hcd
+  usb usb1: SerialNumber: 600000.ehci
+  hub 1-0:1.0: USB hub found
+  hub 1-0:1.0: 3 ports detected
+  ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
+  ohci-atmel: OHCI Atmel driver
+  at91_ohci 500000.ohci: failed to find sfr node
+  at91_ohci 500000.ohci: USB Host Controller
+  at91_ohci 500000.ohci: new USB bus registered, assigned bus number 2
+  at91_ohci 500000.ohci: irq 18, io mem 0x00500000
+  usb usb2: New USB device found, idVendor=1d6b, idProduct=0001
+  usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
+  usb usb2: Product: USB Host Controller
+  usb usb2: Manufacturer: Linux 4.9.36 ohci_hcd
+  usb usb2: SerialNumber: at91
+  hub 2-0:1.0: USB hub found
+  random: fast init done
+  hub 2-0:1.0: 3 ports detected
+  usbcore: registered new interface driver cdc_acm
+  cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
+  usbcore: registered new interface driver usb-storage
+  usbcore: registered new interface driver usbserial
+  usbcore: registered new interface driver usbserial_generic
+  usbserial: USB Serial support registered for generic
+  usbcore: registered new interface driver ftdi_sio
+  usbserial: USB Serial support registered for FTDI USB Serial Device
+  usbcore: registered new interface driver pl2303
+  usbserial: USB Serial support registered for pl2303
+  mousedev: PS/2 mouse device common for all mice
+  rtc rtc0: alarm rollover not handled
+  rtc rtc0: invalid alarm value: 1900-1-1 0:0:0
+  at91_rtc fc0686b0.rtc: rtc core: registered fc0686b0.rtc as rtc0
+  at91_rtc fc0686b0.rtc: AT91 Real Time Clock driver.
+  i2c /dev entries driver
+  AT91: Starting after wakeup
+  sama5d4_wdt fc068640.watchdog: initialized (timeout = 16 sec, nowayout = 0)
+  Bluetooth: HCI UART driver ver 2.3
+  Bluetooth: HCI UART protocol H4 registered
+  Bluetooth: HCI UART protocol BCSP registered
+  Bluetooth: HCI UART protocol LL registered
+  Bluetooth: HCI UART protocol ATH3K registered
+  Bluetooth: HCI UART protocol Three-wire (H5) registered
+  Bluetooth: HCI UART protocol Intel registered
+  Bluetooth: HCI UART protocol Broadcom registered
+  Bluetooth: HCI UART protocol QCA registered
+  Bluetooth: HCI UART protocol AG6XX registered
+  Bluetooth: HCI UART protocol Marvell registered
+  sdhci: Secure Digital Host Controller Interface driver
+  sdhci: Copyright(c) Pierre Ossman
+  atmel_mci fc000000.mmc: version: 0x600
+  atmel_mci fc000000.mmc: using dma0chan5 for DMA transfers
+  atmel_mci fc000000.mmc: Atmel MCI controller at 0xfc000000 irq 31, 1 slots
+  sdhci-pltfm: SDHCI platform and OF driver helper
+  leds-gpio leds: Led d10 renamed to d10_1 due to name collision
+  ledtrig-cpu: registered to indicate activity on CPUs
+  atmel_aes fc044000.aes: version: 0x201
+  atmel_aes fc044000.aes: Atmel AES - Using dma1chan0, dma1chan1 for DMA transfers
+  atmel_sha fc050000.sha: version: 0x420
+  atmel_sha fc050000.sha: using dma1chan2 for DMA transfers
+  atmel_sha fc050000.sha: Atmel SHA1/SHA256/SHA224/SHA384/SHA512
+  atmel_tdes fc04c000.tdes: version: 0x702
+  atmel_tdes fc04c000.tdes: using dma1chan3, dma1chan4 for DMA transfers
+  atmel_tdes fc04c000.tdes: Atmel DES/TDES
+  usbcore: registered new interface driver usbhid
+  usbhid: USB HID core driver
+  iio iio:device0: Resolution used: 10 bits
+  iio iio:device0: ADC Touch screen is disabled.
+  NET: Registered protocol family 10
+  sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
+  NET: Registered protocol family 17
+  NET: Registered protocol family 15
+  Key type dns_resolver registered
+  backlight supply power not found, using dummy regulator
+  pwm-backlight backlight: invalid default brightness level: 128, using 7
+  panel supply power not found, using dummy regulator
+  [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
+  [drm] No driver support for vblank timestamp query.
+  atmel-hlcdc-display-controller atmel-hlcdc-dc: DRM device successfully registered
+  input: gpio_keys as /devices/soc0/gpio_keys/input/input0
+  at91_rtc fc0686b0.rtc: setting system clock to 2012-01-01 00:12:28 UTC (1325376748)
+  IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
+  macb f8020000.ethernet eth0: link up (100/Full)
+  IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
+  IP-Config: Complete:
+       device=eth0, hwaddr=62:03:47:49:cb:f3, ipaddr=192.168.28.28, mask=255.255.255.0, gw=192.168.28.1
+       host=192.168.28.28, domain=, nis-domain=(none)
+       bootserver=192.168.28.104, rootserver=192.168.28.104, rootpath=
+  atmel_usart fc00c000.serial: using dma0chan6 for rx DMA transfers
+  atmel_usart fc00c000.serial: using dma0chan7 for tx DMA transfers
+  VFS: Mounted root (nfs filesystem) on device 0:13.
+  devtmpfs: mounted
+  Freeing unused kernel memory: 1024K (c0900000 - c0a00000)
+  Starting logging: OK
+  Jan  1 00:12:31 VIroot syslog.info syslogd started: BusyBox v1.26.0
+  Jan  1 00:12:31 VIroot user.info kernel: Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
+  Jan  1 00:12:31 VIroot user.info kernel: Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
+  Jan  1 00:12:31 VIroot user.info kernel: Memory: 120140K/131072K available (6144K kernel code, 193K rwdata, 1332K rodata, 1024K init, 177K bss, 10932K reserved, 0K cma-reserved)
+  Jan  1 00:12:31 VIroot user.notice kernel: Virtual kernel memory layout:
+  Jan  1 00:12:31 VIroot user.notice kernel:     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
+  Jan  1 00:12:31 VIroot user.notice kernel:     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
+  Jan  1 00:12:31 VIroot user.notice kernel:     vmalloc : 0xc8800000 - 0xff800000   ( 880 MB)
+  Jan  1 00:12:31 VIroot user.notice kernel:     lowmem  : 0xc0000000 - 0xc8000000   ( 128 MB)
+  Jan  1 00:12:31 VIroot user.notice kernel:     modules : 0xbf000000 - 0xc0000000   (  16 MB)
+  Jan  1 00:12:31 VIroot user.notice kernel:       .text : 0xc0008000 - 0xc0700000   (7136 kB)
+  Jan  1 00:12:31 VIroot user.notice kernel:       .init : 0xc0900000 - 0xc0a00000   (1024 kB)
+  Jan  1 00:12:31 VIroot user.notice kernel:       .data : 0xc0a00000 - 0xc0a30560   ( 194 kB)
+  Jan  1 00:12:31 VIroot user.notice kernel:        .bss : 0xc0a30560 - 0xc0a5c9b8   ( 178 kB)
+  Jan  1 00:12:31 VIroot user.info kernel: NR_IRQS:16 nr_irqs:16 16
+  Jan  1 00:12:31 VIroot user.info kernel: L2C-310 ID prefetch enabled, offset 2 lines
+  Jan  1 00:12:31 VIroot user.info kernel: L2C-310 dynamic clock gating enabled, standby mode enabled
+  Jan  1 00:12:31 VIroot user.info kernel: L2C-310 cache controller enabled, 8 ways, 128 kB
+  Jan  1 00:12:31 VIroot user.info kernel: L2C-310: CACHE_ID 0x410000c9, AUX_CTRL 0x36020000
+  Jan  1 00:12:31 VIroot user.info kernel: clocksource: pit: mask: 0x7ffffff max_cycles: 0x7ffffff, max_idle_ns: 10859434279 ns
+  Jan  1 00:12:31 VIroot user.info kernel: sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
+  Jan  1 00:12:31 VIroot user.info kernel: Console: colour dummy device 80x30
+  Jan  1 00:12:31 VIroot user.info kernel: Calibrating delay loop... 351.43 BogoMIPS (lpj=1757184)
+  Initializing random number generator... Jan  1 00:12:31 VIroot user.info kernel: pid_max: default: 32768 minimum: 301
+  Jan  1 00:12:31 VIroot user.info kernel: Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
+  Jan  1 00:12:31 VIroot user.info kernel: Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
+  Jan  1 00:12:31 VIroot user.info kernel: CPU: Testing write buffer coherency: ok
+  Jan  1 00:12:31 VIroot user.info kernel: Setting up static identity map for 0x20100000 - 0x20100058
+  Jan  1 00:12:31 VIroot user.info kernel: devtmpfs: initialized
+  Jan  1 00:12:31 VIroot user.info kernel: VFP support v0.3: implementor 41 architecture 2 part 30 variant 5 rev 1
+  Jan  1 00:12:31 VIroot user.info kernel: clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
+  Jan  1 00:12:31 VIroot user.info kernel: futex hash table entries: 256 (order: -1, 3072 bytes)
+  Jan  1 00:12:31 VIroot user.info kernel: pinctrl core: initialized pinctrl subsystem
+  Jan  1 00:12:31 VIroot user.info kernel: NET: Registered protocol family 16
+  Jan  1 00:12:31 VIroot user.info kernel: DMA: preallocated 256 KiB pool for atomic coherent allocations
+  Jan  1 00:12:31 VIroot user.info kernel: cpuidle: using governor ladder
+  Jan  1 00:12:31 VIroot user.info kernel: AT91: Detected SoC family: sama5d4
+  Jan  1 00:12:31 VIroot user.info kernel: AT91: Detected SoC: sama5d42, revision 0
+  Jan  1 00:12:31 VIroot user.info kernel: gpio-at91 fc06a000.gpio: at address c8859000
+  Jan  1 00:12:31 VIroot user.info kernel: gpio-at91 fc06b000.gpio: at address c885b000
+  Jan  1 00:12:31 VIroot user.info kernel: gpio-at91 fc06c000.gpio: at address c885d000
+  Jan  1 00:12:31 VIroot user.info kernel: gpio-at91 fc068000.gpio: at address c8871000
+  Jan  1 00:12:31 VIroot user.info kernel: gpio-at91 fc06d000.gpio: at address c8873000
+  Jan  1 00:12:31 VIroot user.info kernel: pinctrl-at91 ahb:done.
+  Starting system message bus: dbus-uuidgen: error while loading shared libraries: libdbus-1.so.3: cannot open shared object file: No such file or directory
+  dbus-daemon: error while loading shared libraries: libdbus-1.so.3: cannot open shared object file: No such file or directory
+  done
+  Starting network: ip: RTNETLINK answers: File exists
+  FAIL
+  Jan  1 00:12:32 VIroot daemon.info : starting pid 146, tty '/dev/console': '/sbin/getty -L  console 0 vt100 '
+  Value Innovation
+  VIroot login: atmel-hlcdc-display-controller atmel-hlcdc-dc: fb0: ID =  frame buffer device drm_fb_helper_single_fb_probe() in drm_fb_helper.c
+  Jan  1 00:12:32 VIroot user.info kernel: atmel-hlcdc-display-controller atmel-hlcdc-dc: fb0: ID =  frame buffer device drm_fb_helper_single_fb_probe() in drm_fb_helper.c
+  Value Innovation
+  VIroot login: root
+  Password:
+  Jan  1 00:12:42 VIroot auth.info login[146]: root login on 'console'
+  #
+  #
+===== 최소사양으로 rootfs 만드는 법 =====
+다음을 참조한다.\\
+http://1.235.32.108/doku.php?id=file_system

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