Uncompressing Linux… done, booting thekernel. //成功解压linux系统，并开启它的内核
[ 0.000000] Booting Linux on physical CPU 0x0 //在CPU上开启linux，是操作系统控制CPU
[ 0.000000] Initializing cgroup subsys cpuset //初始化cgroup
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 4.1.18+ (dc4@dc4-XPS13-9333) (gcc version 4.9.3(crosstool-NG crosstool-ng-1.22.0-88-g8460611) ) #846 Thu Feb 25 14:11:56 GMT2016
//上面显示了linux内核版本，gcc版本，以及当前版本的发布日期

[ 0.000000] CPU: ARMv6-compatible processor [410fb767] revision 7 (ARMv7),cr=00c5387d
//上一条显示了CPU型号，可以看出树莓派使用了ARM

[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasinginstruction cache
[ 0.000000] Machine model: Raspberry Pi Model B Rev 2 //板子的型号
[ 0.000000] cma: Reserved 8 MiB at 0x17400000
[ 0.000000] Memory policy: Data cache writeback //采用的内存cache写机制为writeback

[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 97440
[ 0.000000] Kernel command line: dma.dmachans=0x7f35bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416 bcm2708.boardrev=0xfbcm2708.serial=0x153640f1 smsc95xx.macaddr=B8:27:EB:36:40:F1bcm2708_fb.fbswap=1 bcm2708.uart_clock=3000000 vc_mem.mem_base=0x1ec00000vc_mem.mem_size=0x20000000 dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait //内核输入参数

//下面是各种缓存hash值
[ 0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144bytes)
[ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Memory: 371876K/393216K available (5792K kernel code, 488Krwdata, 1788K rodata, 352K init, 720K bss, 13148K reserved, 8192K cma-reserved)//总内存大小和使用情况，从这里看出树莓派的内存并不大，只有370M多

[ 0.000000] Virtual kernel memory layout: //虚拟内存的布局
[ 0.000000] vector : 0xffff0000 – 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xffc00000 – 0xfff00000 (3072 kB)
[ 0.000000] vmalloc : 0xd8800000- 0xff000000 ( 616 MB)
[ 0.000000] lowmem : 0xc0000000 – 0xd8000000 ( 384 MB)
[ 0.000000] modules : 0xbf000000- 0xc0000000 ( 16 MB)
[ 0.000000] .text : 0xc0008000- 0xc076f1f0 (7581 kB)
[ 0.000000] .init : 0xc0770000- 0xc07c8000 ( 352 kB)
[ 0.000000] .data : 0xc07c8000- 0xc0842260 ( 489 kB)
[ 0.000000] .bss : 0xc0842260- 0xc08f63e0 ( 721 kB)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS:522
[ 0.000000] clocksource stc: mask: 0xffffffff max_cycles: 0xffffffff,max_idle_ns: 1911260446275 ns
[ 0.000015] sched_clock: 32 bits at 1000kHz, resolution 1000ns, wrapsevery 2147483647500ns //定时器信息
[ 0.000056] Switching to timer-based delay loop, resolution 1000ns
[ 0.000341] Console: colour dummy device 80×30
[ 0.001270] console [tty1] enabled //使能终端设备tty1
[ 0.001328] Calibrating delay loop (skipped), value calculated using timerfrequency.. 2.00 BogoMIPS (lpj=10000) //校正回环延时
[ 0.001413] pid_max: default: 32768 minimum: 301
[ 0.001786] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.001858] Mountpoint-cache hash table entries: 1024 (order: 0, 4096bytes)
[ 0.002905] Initializing cgroup subsys blkio //初始化cgroup
[ 0.002999] Initializing cgroup subsys memory
[ 0.003066] Initializing cgroup subsys devices
[ 0.003129] Initializing cgroup subsys freezer
[ 0.003190] Initializing cgroup subsys net_cls
[ 0.003310] CPU: Testing write buffer coherency: ok
[ 0.003430] ftrace: allocating 19747 entries in 58 pages
[ 0.107836] Setting up static identity map for 0x81c0 – 0x81f8
[ 0.110013] devtmpfs: initialized
[ 0.120832] VFP support v0.3: implementor 41 architecture 1 part 20variant b rev 5
[ 0.121284] clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff,max_idle_ns: 19112604462750000 ns
[ 0.123276] pinctrl core: initialized pinctrl subsystem
[ 0.124170] NET: Registered protocol family 16 //网络校准
[ 0.129632] DMA: preallocated 4096 KiB pool for atomic coherentallocations
[ 0.131127] bcm2708.uart_clock = 3000000
[ 0.136001] hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.
[ 0.136081] hw-breakpoint: maximum watchpoint size is 4 bytes.
[ 0.136288] Serial: AMBA PL011 UART driver //使用的串口驱动
[ 0.136589] 20201000.uart: ttyAMA0 at MMIO 0x20201000 (irq = 83, base_baud= 0) is a PL011 rev2
[ 0.504515] console [ttyAMA0] enabled //使能串口ttyAMA0
[ 0.508911] bcm2835-mbox 2000b880.mailbox: mailbox enabled //使能邮箱
[ 0.554869] bcm2708-dmaengine 20007000.dma: DMA legacy API manager atf2007000, dmachans=0xf35
[ 0.563600] bcm2708-dmaengine 20007000.dma: Initialized 7 DMA channels (+1 legacy)
[ 0.572162] bcm2708-dmaengine 20007000.dma: Load BCM2835 DMA engine driver
[ 0.579092] bcm2708-dmaengine 20007000.dma: dma_debug:0
[ 0.585243] SCSI subsystem initialized //初始化系统接口
[ 0.589401] usbcore: registered new interface driver usbfs
[ 0.595122] usbcore: registered new interface driver hub
[ 0.600656] usbcore: registered new device driver usb
[ 0.606686] raspberrypi-firmware soc:firmware: Attached to firmware from2016-02-25 14:31
[ 0.642371] Switched to clocksource stc
[ 0.695500] FS-Cache: Loaded
[ 0.698798] CacheFiles: Loaded

//下面显示的是TCP/IP信息
[ 0.717541] NET: Registered protocol family 2
[ 0.723470] TCP established hash table entries: 4096 (order: 2, 16384bytes)
[ 0.730661] TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.737291] TCP: Hash tables configured (established 4096 bind 4096)
[ 0.743929] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.749825] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.756511] NET: Registered protocol family 1

[ 0.761478] RPC: Registered named UNIX socket transport module.
[ 0.767532] RPC: Registered udp transport module.
[ 0.772266] RPC: Registered tcp transport module.
[ 0.777032] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.784749] hw perfevents: enabled with armv6_1176 PMU driver, 3 countersavailable
[ 0.793884] futex hash table entries: 256 (order: -1, 3072 bytes)

//虚拟文件系统有关信息
[ 0.816313] VFS: Disk quotas dquot_6.6.0
[ 0.820696] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096bytes)
[ 0.830375] FS-Cache: Netfs ‘nfs’ registered for caching
[ 0.837143] NFS: Registering the id_resolver key type
[ 0.842322] Key type id_resolver registered
[ 0.846658] Key type id_legacy registered
[ 0.854494] Block layer SCSI generic (bsg) driver version 0.4 loaded(major 252)
[ 0.862473] io scheduler noop registered
[ 0.866474] io scheduler deadline registered (default)
[ 0.872047] io scheduler cfq registered
[ 0.878477] BCM2708FB: allocated DMA memory 57800000
[ 0.883646] BCM2708FB: allocated DMA channel 0 @ f2007000
[ 0.894186] Console: switching to colour frame buffer device 82×26
[ 0.905430] Serial: 8250/16550 driver, 0 ports, IRQ sharing disabled
[ 0.915179] vc-cma: Videocore CMA driver
[ 0.920860] vc-cma: vc_cma_base = 0x00000000
[ 0.927309] vc-cma: vc_cma_size = 0x00000000 (0 MiB)
[ 0.934378]vc-cma: vc_cma_initial = 0x00000000 (0MiB)
[ 0.941677] vc-mem: phys_addr:0x00000000 mem_base=0x1ec00000mem_size:0x20000000(512 MiB)
[ 0.972179] brd: module loaded
[ 0.986062] loop: module loaded
[ 0.991863] vchiq: vchiq_init_state: slot_zero = 0xd7880000, is_master = 0
[ 1.002486] Loading iSCSI transport class v2.0-870.
[ 1.010552] usbcore: registered new interface driver smsc95xx
[ 1.018207] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[ 1.225875] Core Release: 2.80a
[ 1.230567] Setting default values for core params //设置内核参数的默认值
[ 1.236937] Finished setting default values for core params
[ 1.444371] Using Buffer DMA mode //使用缓冲DMA模式
[ 1.449265] Periodic Transfer Interrupt Enhancement – disabled
[ 1.456709] Multiprocessor Interrupt Enhancement – disabled
[ 1.463935] OTG VER PARAM: 0, OTG VER FLAG: 0
[ 1.469915] Dedicated Tx FIFOs mode
[ 1.475501] WARN::dwc_otg_hcd_init:1047: FIQ DMA bounce buffers: virt =0xd7814000 dma = 0x57814000 len=9024
[ 1.488646] FIQ FSM acceleration enabled for :
[ 1.488646] Non-periodic Split Transactions
[ 1.488646] Periodic Split Transactions
[ 1.488646] High-Speed Isochronous Endpoints
[ 1.511989] WARN::hcd_init_fiq:412: FIQ on core 0 at 0xc03dd6ac
[ 1.519570] WARN::hcd_init_fiq:413: FIQ ASM at 0xc03dd988 length 36
[ 1.527478] WARN::hcd_init_fiq:438: MPHI regs_base at 0xd8896000
[ 1.535197] dwc_otg 20980000.usb: DWC OTG Controller
[ 1.541817] dwc_otg 20980000.usb: new USB bus registered, assigned busnumber 1
[ 1.550854] dwc_otg 20980000.usb: irq 32, io mem 0x00000000
[ 1.558101] Init: Port Power? op_state=1
[ 1.563626] Init: Power Port (0)

//USB配置
[ 1.568714] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.577170]usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.586032] usb usb1: Product: DWC OTG Controller
[ 1.592305] usb usb1: Manufacturer: Linux 4.1.18+ dwc_otg_hcd
[ 1.599648] usb usb1: SerialNumber: 20980000.usb
[ 1.606886] hub 1-0:1.0: USB hub found //未找到USB扩展槽
[ 1.612310] hub 1-0:1.0: 1 port detected
[ 1.619043] usbcore: registered new interface driver usb-storage
[ 1.627142] mousedev: PS/2 mouse device common for all mice //检测鼠标设备
[ 1.635371] bcm2835-cpufreq: min=700000 max=700000
[ 1.642104] sdhci: Secure Digital Host Controller Interface driver
[ 1.649923] sdhci: Copyright(c) Pierre Ossman
[ 1.656279] sdhost: log_buf @ d7813000 (57813000)
[ 1.742444] mmc0: sdhost-bcm2835 loaded – DMA enabled (>1)
[ 1.750098] sdhci-pltfm: SDHCI platform and OF driver helper
[ 1.778321] ledtrig-cpu: registered to indicate activity on CPUs
[ 1.786285] hidraw: raw HID events driver (C) Jiri Kosina
[ 1.793672] usbcore: registered new interface driver usbhid
[ 1.800841] usbhid: USB HID core driver
[ 1.810806] Initializing XFRM netlink socket
[ 1.816970] Indeed it is in host mode hprt0 = 00021501
[ 1.884272] NET: Registered protocol family 17
[ 1.890739] Key type dns_resolver registered
[ 1.904607] registered taskstats version 1
[ 1.910758] vc-sm: Videocore shared memory driver
[ 1.917373] [vc_sm_connected_init]: start
[ 1.924493] [vc_sm_connected_init]: end – returning 0
[ 1.933640] Waiting for root device /dev/mmcblk0p2…
[ 1.950032] mmc0: host does not supportreading read-only switch, assuming write-enable
[ 1.963252] mmc0: new high speed SDHC card at address b368
[ 1.971221] mmcblk0: mmc0:b368 SDC 7.51 GiB
[ 1.979403] mmcblk0: p1 p2
[ 2.045919] EXT4-fs (mmcblk0p2): INFO: recovery required on readonlyfilesystem
[ 2.055107] EXT4-fs (mmcblk0p2): write access will be enabled duringrecovery
[ 2.064011] usb 1-1: new high-speed USB device number 2 using dwc_otg
[ 2.072304] Indeed it is in host mode hprt0 = 00001101
[ 2.272929] usb 1-1: New USB device found, idVendor=0424, idProduct=9512
[ 2.281447] usb 1-1: New USB device strings: Mfr=0, Product=0,SerialNumber=0
[ 2.293574] hub 1-1:1.0: USB hub found
[ 2.299629] hub 1-1:1.0: 3 ports detected
[ 2.582439] usb 1-1.1: new high-speed USB device number 3 using dwc_otg
[ 2.702859] usb 1-1.1: New USB device found, idVendor=0424, idProduct=ec00
[ 2.711539] usb 1-1.1: New USB device strings: Mfr=0, Product=0,SerialNumber=0
[ 2.723755] smsc95xx v1.0.4
[ 2.786975] smsc95xx 1-1.1:1.0 eth0: register ‘smsc95xx’ atusb-20980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:36:40:f1

//文件系统
[ 7.346049] EXT4-fs (mmcblk0p2): orphan cleanup on readonly fs
[ 7.354501] EXT4-fs (mmcblk0p2): 1 orphan inode deleted
[ 7.361597] EXT4-fs (mmcblk0p2): recovery complete
[ 8.869364] EXT4-fs (mmcblk0p2): mounted filesystem with ordered datamode. Opts: (null)
[ 8.881111] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
[ 8.891282] devtmpfs: mounted
[ 8.897259] Freeing unused kernel memory: 352K (c0770000 – c07c8000)
[ 9.236671] random: systemd urandom read with 73 bits of entropy available
[ 9.252265] systemd[1]: systemd 215 running in system mode. (+PAM +AUDIT+SELINUX +IMA +SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ -SECCOMP -APPARMOR)
[ 9.270090] systemd[1]: Detected architecture ‘arm’.
[ 9.406174] NET: Registered protocol family 10
[ 9.414751] systemd[1]: Inserted module ‘ipv6’ //支持ipv6
[ 9.426332] systemd[1]: Set hostname to . //设计主机名，此处已经被我修改过
[ 9.634011] uart-pl011 20201000.uart: no DMA platform data

[ 10.258133] systemd[1]: Starting Forward Password Requests to WallDirectory Watch.
[ 10.270389] systemd[1]: Started Forward Password Requests to WallDirectory Watch.
[ 10.282087] systemd[1]: Expecting device dev-ttyAMA0.device…
[ 10.293248] systemd[1]: Starting Remote File Systems (Pre).
[ 10.303622] systemd[1]: Reached target Remote File Systems (Pre).
[ 10.312114] systemd[1]: Starting Arbitrary Executable File Formats FileSystem Automount Point.
[ 10.328272] systemd[1]: Set up automount Arbitrary Executable FileFormats File System Automount Point.
[ 10.342079] systemd[1]: Starting Encrypted Volumes.
[ 10.351909] systemd[1]: Reached target Encrypted Volumes.
[ 10.359658] systemd[1]: Starting Swap.
[ 10.368294] systemd[1]: Reached target Swap.
[ 10.374898] systemd[1]: Expecting device dev-mmcblk0p1.device…
[ 10.385682] systemd[1]: Starting Root Slice.
[ 10.394786] systemd[1]: Created slice Root Slice.
[ 10.401561] systemd[1]: Starting User and Session Slice.
[ 10.411810] systemd[1]: Created slice User and Session Slice.
[ 10.419709] systemd[1]: Starting Delayed Shutdown Socket.
[ 10.429852] systemd[1]: Listening on Delayed Shutdown Socket.
[ 10.437687] systemd[1]: Starting /dev/initctl Compatibility Named Pipe.
[ 10.449126] systemd[1]: Listening on /dev/initctl Compatibility NamedPipe.
[ 10.458152] systemd[1]: Starting Journal Socket (/dev/log).
[ 10.468458] systemd[1]: Listening on JournalSocket (/dev/log).
[ 10.476524] systemd[1]: Starting udev Control Socket.
[ 10.486376] systemd[1]: Listening on udev Control Socket.
[ 10.493947] systemd[1]: Starting udev Kernel Socket.
[ 10.503531] systemd[1]: Listening on udev Kernel Socket.
[ 10.510903] systemd[1]: Starting Journal Socket.
[ 10.520322] systemd[1]: Listening on Journal Socket.
[ 10.527576] systemd[1]: Starting System Slice.
[ 10.536809] systemd[1]: Created slice System Slice.
[ 10.543946] systemd[1]: Starting File System Check on Root Device…
[ 10.559510] systemd[1]: Starting system-systemd\x2dfsck.slice.
[ 10.580880] systemd[1]: Created slice system-systemd\x2dfsck.slice.
[ 10.595477] systemd[1]: Starting system-autologin.slice.
[ 10.610844] systemd[1]: Created slice system-autologin.slice.
[ 10.620166] systemd[1]: Starting system-serial\x2dgetty.slice.
[ 10.634719] systemd[1]: Created slice system-serial\x2dgetty.slice.
[ 10.643791] systemd[1]: Starting Increase datagram queue length…
[ 10.661224] systemd[1]: Starting Restore / save the current clock…
[ 10.699533] systemd[1]: Starting udev Coldplug all Devices…
[ 10.783765] systemd[1]: Starting Load Kernel Modules… //开始载入内核模块
[ 10.841213] systemd[1]: Mounting Debug File System…
[ 10.911837] systemd[1]: Starting Create list of required static devicenodes for the current kernel…
[ 10.980384] fuse init (API version 7.23)
[ 11.049606] i2c /dev entries driver
[ 11.111757] systemd[1]: Mounted Huge Pages File System.
[ 11.198073] systemd[1]: Started Set Up Additional Binary Formats.
[ 11.224599] systemd[1]: Mounting POSIX Message Queue File System…
[ 11.249546] systemd[1]: Starting Slices.
[ 11.272729] systemd[1]: Reached target Slices.
[ 11.302720] systemd[1]: Mounted POSIX Message Queue File System.
[ 11.314864] systemd[1]: Mounted Debug File System.
[ 11.328551] systemd[1]: Started File System Check on Root Device.
[ 11.356927] systemd[1]: Started Increase datagram queue length.
[ 11.370056] systemd[1]: Started Restore / save the current clock.
[ 11.402777] systemd[1]: Started Load Kernel Modules.
[ 11.426206] systemd[1]: Started Create list of required static devicenodes for the current kernel.
[ 11.460288] systemd[1]: Time has been changed
[ 11.580311] systemd[1]: Started udev Coldplug all Devices.
[ 11.803989] systemd[1]: Starting Create Static Device Nodes in /dev…
[ 11.821373] systemd[1]: Starting Apply Kernel Variables…
[ 11.855747] systemd[1]: Mounting Configuration File System…
[ 11.916927] systemd[1]: Mounting FUSE Control File System…

Raspbian GNU/Linux 8 kamisama ttyAMA0

kamisama login: //开始要求输入账户和密码进行登录

//随后我输入账号和密码即提示登录成功，登录后显示如下信息：
kamisamalogin: pi
Password:
Lastlogin: Wed Mar 9 22:17:19 CST 2016 ontty1 //上次的登录时间以及登录设备
Linuxkamisama 4.1.18+ #846 Thu Feb 25 14:11:56 GMT 2016 armv6l //系统版本发布时间

//系统简介
Theprograms included with the Debian GNU/Linux system are free software;
the exactdistribution terms for each program are described in the
individualfiles in /usr/share/doc/*/copyright.

//法律声明
DebianGNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permittedby applicable law.

摘自http://blog.csdn.net/xuanzhuanecy/article/details/51488775