AM335x(TQ335x)學(xué)習(xí)筆記——掛載Ramdisk

作者：時間：2016-11-28 來源：網(wǎng)絡(luò)

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接下來加載ramdisk到DRAM：

loadmmc0${rdaddr}/boot/ramdisk.img

${rdaddr}的默認(rèn)值是0x88080000
最后就是將ramdisk和dtb的加載地址作為參數(shù)啟動內(nèi)核：

bootz${loadaddr}${rdaddr}${fdtaddr}

至此，Linux內(nèi)核已經(jīng)能夠正常啟動并進(jìn)入終端模式了。

啟動Log如下：

Hitanykeytostopautoboot:0
U-Boot#loadmmc0${fdtaddr}/boot/tq335x.dtb
34781bytesreadin9ms(3.7MiB/s)
U-Boot#loadmmc0${loadaddr}/boot/zImage
4377824bytesreadin242ms(17.3MiB/s)
U-Boot#loadmmc0${rdaddr}/boot/ramdisk.img
1120934bytesreadin68ms(15.7MiB/s)
U-Boot#bootz${loadaddr}${rdaddr}${fdtaddr}
Kernelimage@0x82000000[0x000000-0x42cce0]
##LoadinginitRamdiskfromLegacyImageat88080000...
ImageName:ramdisk
Created:2014-11-1815:47:41UTC
ImageType:ARMLinuxRAMDiskImage(uncompressed)
DataSize:1120870Bytes=1.1MiB
LoadAddress:88080000
EntryPoint:88080000
VerifyingChecksum...OK
##FlattenedDeviceTreeblobat88000000
Bootingusingthefdtblobat0x88000000
LoadingRamdiskto8feee000,end8ffffa66...OK
LoadingDeviceTreeto8fee2000,end8feed7dc...OK
Startingkernel...
[0.000000]BootingLinuxonphysicalCPU0x0
[0.000000]Linuxversion3.17.2(lilianrong@AY140721164813287e77Z)(gccversion4.7.3(Ubuntu/Linaro4.7.3-12ubuntu1))#1SMPTueNov1822:49:31CST2014
[0.000000]CPU:ARMv7Processor[413fc082]revision2(ARMv7),cr=10c5387d
[0.000000]CPU:PIPT/VIPTnonaliasingdatacache,VIPTaliasinginstructioncache
[0.000000]Machinemodel:TIAM335xEVM
[0.000000]cma:Reserved16MiBat9e800000
[0.000000]Memorypolicy:Datacachewriteback
[0.000000]HighMemzone:1048574pagesexceedsfreesize0
[0.000000]CPU:AllCPU(s)startedinSVCmode.
[0.000000]AM335XES2.1(sgxneon)
[0.000000]PERCPU:Embedded9pages/cpu@dfa9a000s14336r8192d14336u36864
[0.000000]Built1zonelistsinZoneorder,mobilitygroupingon.Totalpages:129792
[0.000000]Kernelcommandline:console=ttyO0,115200n8root=/dev/ram0
[0.000000]PIDhashtableentries:2048(order:1,8192bytes)
[0.000000]Dentrycachehashtableentries:65536(order:6,262144bytes)
[0.000000]Inode-cachehashtableentries:32768(order:5,131072bytes)
[0.000000]Memory:483692K/523264Kavailable(5668Kkernelcode,647Krwdata,2208Krodata,406Kinit,8210Kbss,39572Kreserved,0Khighmem)
[0.000000]Virtualkernelmemorylayout:
[0.000000]vector:0xffff0000-0xffff1000(4kB)
[0.000000]fixmap:0xffc00000-0xffe00000(2048kB)
[0.000000]vmalloc:0xe0800000-0xff000000(488MB)
[0.000000]lowmem:0xc0000000-0xe0000000(512MB)
[0.000000]pkmap:0xbfe00000-0xc0000000(2MB)
[0.000000]modules:0xbf000000-0xbfe00000(14MB)
[0.000000].text:0xc0008000-0xc07b9478(7878kB)
[0.000000].init:0xc07ba000-0xc081f800(406kB)
[0.000000].data:0xc0820000-0xc08c1d08(648kB)
[0.000000].bss:0xc08c1d08-0xc10c68e0(8211kB)
[0.000000]HierarchicalRCUimplementation.
[0.000000]RCUrestrictingCPUsfromNR_CPUS=2tonr_cpu_ids=1.
[0.000000]RCU:Adjustinggeometryforrcu_fanout_leaf=16,nr_cpu_ids=1
[0.000000]NR_IRQS:16nr_irqs:1616
[0.000000]IRQ:FoundanINTCat0xfa200000(revision5.0)with128interrupts
[0.000000]Totalof128interruptson1activecontroller
[0.000000]OMAPclockeventsource:timer2at24000000Hz
[0.000013]sched_clock:32bitsat24MHz,resolution41ns,wrapsevery178956969942ns
[0.000061]OMAPclocksource:timer1at24000000Hz
[0.000795]Console:colourdummydevice80x30
[0.000847]Lockdependencyvalidator:Copyright(c)2006RedHat,Inc.,IngoMolnar
[0.000856]...MAX_LOCKDEP_SUBCLASSES:8
[0.000863]...MAX_LOCK_DEPTH:48
[0.000870]...MAX_LOCKDEP_KEYS:8191
[0.000878]...CLASSHASH_SIZE:4096
[0.000885]...MAX_LOCKDEP_ENTRIES:32768
[0.000892]...MAX_LOCKDEP_CHAINS:65536
[0.000900]...CHAINHASH_SIZE:32768
[0.000907]memoryusedbylockdependencyinfo:5167kB
[0.000915]pertask-structmemoryfootprint:1152bytes
[0.000956]Calibratingdelayloop...996.14BogoMIPS(lpj=4980736)
[0.079037]pid_max:default:32768minimum:301
[0.079438]SecurityFrameworkinitialized
[0.079564]Mount-cachehashtableentries:1024(order:0,4096bytes)
[0.079576]Mountpoint-cachehashtableentries:1024(order:0,4096bytes)
[0.081769]CPU:Testingwritebuffercoherency:ok
[0.082962]CPU0:thread-1,cpu0,socket-1,mpidr0
[0.083084]Settingupstaticidentitymapfor0x8055f030-0x8055f0a0
[0.086327]Broughtup1CPUs
[0.086347]SMP:Totalof1processorsactivated.
[0.086357]CPU:AllCPU(s)startedinSVCmode.
[0.088983]devtmpfs:initialized
[0.097743]VFPsupportv0.3:implementor41architecture3part30variantcrev3
[0.132789]omap_hwmod:tptc0usingbrokendtdatafromedma
[0.133139]omap_hwmod:tptc1usingbrokendtdatafromedma
[0.133467]omap_hwmod:tptc2usingbrokendtdatafromedma
[0.141252]omap_hwmod:debugss:_wait_target_disablefailed
[0.198964]pinctrlcore:initializedpinctrlsubsystem
[0.201633]regulator-dummy:noparameters
[0.231057]NET:Registeredprotocolfamily16
[0.239540]DMA:preallocated256KiBpoolforatomiccoherentallocations
[0.241725]cpuidle:usinggovernorladder
[0.241754]cpuidle:usinggovernormenu
[0.253658]OMAPGPIOhardwareversion0.1
[0.268591]omap-gpmc50000000.gpmc:couldnotfindpctldevfornode/pinmux@44e10800/nandflash_pins_s0,deferringprobe
[0.268635]platform50000000.gpmc:Driveromap-gpmcrequestsprobedeferral
[0.273243]NoATAGs?
[0.273274]hw-breakpoint:debugarchitecture0x4unsupported.
[0.316650]edma-dma-engineedma-dma-engine.0:TIEDMADMAenginedriver
[0.318001]vbat:5000mV
[0.318774]lis3_reg:noparameters
[0.322209]SCSIsubsysteminitialized
[0.323028]usbcore:registerednewinterfacedriverusbfs
[0.323207]usbcore:registerednewinterfacedriverhub
[0.327009]usbcore:registerednewdevicedriverusb
[0.327877]omap_i2c44e0b000.i2c:couldnotfindpctldevfornode/pinmux@44e10800/pinmux_i2c0_pins,deferringprobe
[0.327917]platform44e0b000.i2c:Driveromap_i2crequestsprobedeferral
[0.327972]omap_i2c4802a000.i2c:couldnotfindpctldevfornode/pinmux@44e10800/pinmux_i2c1_pins,deferringprobe
[0.327995]platform4802a000.i2c:Driveromap_i2crequestsprobedeferral
[0.332363]Switchedtoclocksourcetimer1
[0.477595]NET:Registeredprotocolfamily2
[0.479415]TCPestablishedhashtableentries:4096(order:2,16384bytes)
[0.479601]TCPbindhashtableentries:4096(order:5,147456bytes)
[0.480965]TCP:Hashtablesconfigured(established4096bind4096)
[0.481157]TCP:renoregistered
[0.481186]UDPhashtableentries:256(order:2,20480bytes)
[0.481375]UDP-Litehashtableentries:256(order:2,20480bytes)
[0.482657]NET:Registeredprotocolfamily1
[0.484656]RPC:RegisterednamedUNIXsockettransportmodule.
[0.484680]RPC:Registeredudptransportmodule.
[0.484690]RPC:Registeredtcptransportmodule.
[0.484699]RPC:RegisteredtcpNFSv4.1backchanneltransportmodule.
[0.485566]Tryingtounpackrootfsimageasinitramfs...
[0.487045]rootfsimageisnotinitramfs(nocpiomagic);lookslikeaninitrd
[0.497016]Freeinginitrdmemory:1092K(cfeee000-cffff000)
[0.497514]hwperfevents:enabledwitharmv7_cortex_a8PMUdriver,5countersavailable
[0.501968]futexhashtableentries:256(order:2,16384bytes)
[0.507634]VFS:Diskquotasdquot_6.5.2
[0.507781]Dquot-cachehashtableentries:1024(order0,4096bytes)
[0.510254]NFS:Registeringtheid_resolverkeytype
[0.510637]Keytypeid_resolverregistered
[0.510653]Keytypeid_legacyregistered
[0.510794]jffs2:version2.2.(NAND)(SUMMARY)漏2001-2006RedHat,Inc.
[0.511229]msgmnihasbeensetto978
[0.516624]ioschedulernoopregistered
[0.516656]ioschedulerdeadlineregistered
[0.516726]ioschedulercfqregistered(default)
[0.519057]pinctrl-single44e10800.pinmux:142pinsatpaf9e10800size568
[0.522800]Serial:8250/16550driver,4ports,IRQsharingenabled
[0.528945]omap_uart44e09000.serial:nowakeirqforuart0
[0.529540]44e09000.serial:ttyO0atMMIO0x44e09000(irq=88,base_baud=3000000)isaOMAPUART0

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