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	 > 嵌入式系統(tǒng) > 設(shè)計應(yīng)用 > AM335x(TQ335x)學(xué)習(xí)筆記——掛載Ramdisk
          
    
          

          

          


	
	
	

          
	
          
		
          
			
          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：
          1. loadmmc0${rdaddr}/boot/ramdisk.img
          ${rdaddr}的默認(rèn)值是0x88080000
          最后就是將ramdisk和dtb的加載地址作為參數(shù)啟動內(nèi)核：
          1. bootz${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：
          1. Hitanykeytostopautoboot:0
          2. U-Boot#loadmmc0${fdtaddr}/boot/tq335x.dtb
          3. 34781bytesreadin9ms(3.7MiB/s)
          4. U-Boot#loadmmc0${loadaddr}/boot/zImage
          5. 4377824bytesreadin242ms(17.3MiB/s)
          6. U-Boot#loadmmc0${rdaddr}/boot/ramdisk.img
          7. 1120934bytesreadin68ms(15.7MiB/s)
          8. U-Boot#bootz${loadaddr}${rdaddr}${fdtaddr}
          9. Kernelimage@0x82000000[0x000000-0x42cce0]
          10. ##LoadinginitRamdiskfromLegacyImageat88080000...
          11. ImageName:ramdisk
          12. Created:2014-11-1815:47:41UTC
          13. ImageType:ARMLinuxRAMDiskImage(uncompressed)
          14. DataSize:1120870Bytes=1.1MiB
          15. LoadAddress:88080000
          16. EntryPoint:88080000
          17. VerifyingChecksum...OK
          18. ##FlattenedDeviceTreeblobat88000000
          19. Bootingusingthefdtblobat0x88000000
          20. LoadingRamdiskto8feee000,end8ffffa66...OK
          21. LoadingDeviceTreeto8fee2000,end8feed7dc...OK
          24. Startingkernel...
          27. [0.000000]BootingLinuxonphysicalCPU0x0
          28. [0.000000]Linuxversion3.17.2(lilianrong@AY140721164813287e77Z)(gccversion4.7.3(Ubuntu/Linaro4.7.3-12ubuntu1))#1SMPTueNov1822:49:31CST2014
          29. [0.000000]CPU:ARMv7Processor[413fc082]revision2(ARMv7),cr=10c5387d
          30. [0.000000]CPU:PIPT/VIPTnonaliasingdatacache,VIPTaliasinginstructioncache
          31. [0.000000]Machinemodel:TIAM335xEVM
          32. [0.000000]cma:Reserved16MiBat9e800000
          33. [0.000000]Memorypolicy:Datacachewriteback
          34. [0.000000]HighMemzone:1048574pagesexceedsfreesize0
          35. [0.000000]CPU:AllCPU(s)startedinSVCmode.
          36. [0.000000]AM335XES2.1(sgxneon)
          37. [0.000000]PERCPU:Embedded9pages/cpu@dfa9a000s14336r8192d14336u36864
          38. [0.000000]Built1zonelistsinZoneorder,mobilitygroupingon.Totalpages:129792
          39. [0.000000]Kernelcommandline:console=ttyO0,115200n8root=/dev/ram0
          40. [0.000000]PIDhashtableentries:2048(order:1,8192bytes)
          41. [0.000000]Dentrycachehashtableentries:65536(order:6,262144bytes)
          42. [0.000000]Inode-cachehashtableentries:32768(order:5,131072bytes)
          43. [0.000000]Memory:483692K/523264Kavailable(5668Kkernelcode,647Krwdata,2208Krodata,406Kinit,8210Kbss,39572Kreserved,0Khighmem)
          44. [0.000000]Virtualkernelmemorylayout:
          45. [0.000000]vector:0xffff0000-0xffff1000(4kB)
          46. [0.000000]fixmap:0xffc00000-0xffe00000(2048kB)
          47. [0.000000]vmalloc:0xe0800000-0xff000000(488MB)
          48. [0.000000]lowmem:0xc0000000-0xe0000000(512MB)
          49. [0.000000]pkmap:0xbfe00000-0xc0000000(2MB)
          50. [0.000000]modules:0xbf000000-0xbfe00000(14MB)
          51. [0.000000].text:0xc0008000-0xc07b9478(7878kB)
          52. [0.000000].init:0xc07ba000-0xc081f800(406kB)
          53. [0.000000].data:0xc0820000-0xc08c1d08(648kB)
          54. [0.000000].bss:0xc08c1d08-0xc10c68e0(8211kB)
          55. [0.000000]HierarchicalRCUimplementation.
          56. [0.000000]RCUrestrictingCPUsfromNR_CPUS=2tonr_cpu_ids=1.
          57. [0.000000]RCU:Adjustinggeometryforrcu_fanout_leaf=16,nr_cpu_ids=1
          58. [0.000000]NR_IRQS:16nr_irqs:1616
          59. [0.000000]IRQ:FoundanINTCat0xfa200000(revision5.0)with128interrupts
          60. [0.000000]Totalof128interruptson1activecontroller
          61. [0.000000]OMAPclockeventsource:timer2at24000000Hz
          62. [0.000013]sched_clock:32bitsat24MHz,resolution41ns,wrapsevery178956969942ns
          63. [0.000061]OMAPclocksource:timer1at24000000Hz
          64. [0.000795]Console:colourdummydevice80x30
          65. [0.000847]Lockdependencyvalidator:Copyright(c)2006RedHat,Inc.,IngoMolnar
          66. [0.000856]...MAX_LOCKDEP_SUBCLASSES:8
          67. [0.000863]...MAX_LOCK_DEPTH:48
          68. [0.000870]...MAX_LOCKDEP_KEYS:8191
          69. [0.000878]...CLASSHASH_SIZE:4096
          70. [0.000885]...MAX_LOCKDEP_ENTRIES:32768
          71. [0.000892]...MAX_LOCKDEP_CHAINS:65536
          72. [0.000900]...CHAINHASH_SIZE:32768
          73. [0.000907]memoryusedbylockdependencyinfo:5167kB
          74. [0.000915]pertask-structmemoryfootprint:1152bytes
          75. [0.000956]Calibratingdelayloop...996.14BogoMIPS(lpj=4980736)
          76. [0.079037]pid_max:default:32768minimum:301
          77. [0.079438]SecurityFrameworkinitialized
          78. [0.079564]Mount-cachehashtableentries:1024(order:0,4096bytes)
          79. [0.079576]Mountpoint-cachehashtableentries:1024(order:0,4096bytes)
          80. [0.081769]CPU:Testingwritebuffercoherency:ok
          81. [0.082962]CPU0:thread-1,cpu0,socket-1,mpidr0
          82. [0.083084]Settingupstaticidentitymapfor0x8055f030-0x8055f0a0
          83. [0.086327]Broughtup1CPUs
          84. [0.086347]SMP:Totalof1processorsactivated.
          85. [0.086357]CPU:AllCPU(s)startedinSVCmode.
          86. [0.088983]devtmpfs:initialized
          87. [0.097743]VFPsupportv0.3:implementor41architecture3part30variantcrev3
          88. [0.132789]omap_hwmod:tptc0usingbrokendtdatafromedma
          89. [0.133139]omap_hwmod:tptc1usingbrokendtdatafromedma
          90. [0.133467]omap_hwmod:tptc2usingbrokendtdatafromedma
          91. [0.141252]omap_hwmod:debugss:_wait_target_disablefailed
          92. [0.198964]pinctrlcore:initializedpinctrlsubsystem
          93. [0.201633]regulator-dummy:noparameters
          94. [0.231057]NET:Registeredprotocolfamily16
          95. [0.239540]DMA:preallocated256KiBpoolforatomiccoherentallocations
          96. [0.241725]cpuidle:usinggovernorladder
          97. [0.241754]cpuidle:usinggovernormenu
          98. [0.253658]OMAPGPIOhardwareversion0.1
          99. [0.268591]omap-gpmc50000000.gpmc:couldnotfindpctldevfornode/pinmux@44e10800/nandflash_pins_s0,deferringprobe
          100. [0.268635]platform50000000.gpmc:Driveromap-gpmcrequestsprobedeferral
          101. [0.273243]NoATAGs?
          102. [0.273274]hw-breakpoint:debugarchitecture0x4unsupported.
          103. [0.316650]edma-dma-engineedma-dma-engine.0:TIEDMADMAenginedriver
          104. [0.318001]vbat:5000mV
          105. [0.318774]lis3_reg:noparameters
          106. [0.322209]SCSIsubsysteminitialized
          107. [0.323028]usbcore:registerednewinterfacedriverusbfs
          108. [0.323207]usbcore:registerednewinterfacedriverhub
          109. [0.327009]usbcore:registerednewdevicedriverusb
          110. [0.327877]omap_i2c44e0b000.i2c:couldnotfindpctldevfornode/pinmux@44e10800/pinmux_i2c0_pins,deferringprobe
          111. [0.327917]platform44e0b000.i2c:Driveromap_i2crequestsprobedeferral
          112. [0.327972]omap_i2c4802a000.i2c:couldnotfindpctldevfornode/pinmux@44e10800/pinmux_i2c1_pins,deferringprobe
          113. [0.327995]platform4802a000.i2c:Driveromap_i2crequestsprobedeferral
          114. [0.332363]Switchedtoclocksourcetimer1
          115. [0.477595]NET:Registeredprotocolfamily2
          116. [0.479415]TCPestablishedhashtableentries:4096(order:2,16384bytes)
          117. [0.479601]TCPbindhashtableentries:4096(order:5,147456bytes)
          118. [0.480965]TCP:Hashtablesconfigured(established4096bind4096)
          119. [0.481157]TCP:renoregistered
          120. [0.481186]UDPhashtableentries:256(order:2,20480bytes)
          121. [0.481375]UDP-Litehashtableentries:256(order:2,20480bytes)
          122. [0.482657]NET:Registeredprotocolfamily1
          123. [0.484656]RPC:RegisterednamedUNIXsockettransportmodule.
          124. [0.484680]RPC:Registeredudptransportmodule.
          125. [0.484690]RPC:Registeredtcptransportmodule.
          126. [0.484699]RPC:RegisteredtcpNFSv4.1backchanneltransportmodule.
          127. [0.485566]Tryingtounpackrootfsimageasinitramfs...
          128. [0.487045]rootfsimageisnotinitramfs(nocpiomagic);lookslikeaninitrd
          129. [0.497016]Freeinginitrdmemory:1092K(cfeee000-cffff000)
          130. [0.497514]hwperfevents:enabledwitharmv7_cortex_a8PMUdriver,5countersavailable
          131. [0.501968]futexhashtableentries:256(order:2,16384bytes)
          132. [0.507634]VFS:Diskquotasdquot_6.5.2
          133. [0.507781]Dquot-cachehashtableentries:1024(order0,4096bytes)
          134. [0.510254]NFS:Registeringtheid_resolverkeytype
          135. [0.510637]Keytypeid_resolverregistered
          136. [0.510653]Keytypeid_legacyregistered
          137. [0.510794]jffs2:version2.2.(NAND)(SUMMARY)漏2001-2006RedHat,Inc.
          138. [0.511229]msgmnihasbeensetto978
          139. [0.516624]ioschedulernoopregistered
          140. [0.516656]ioschedulerdeadlineregistered
          141. [0.516726]ioschedulercfqregistered(default)
          142. [0.519057]pinctrl-single44e10800.pinmux:142pinsatpaf9e10800size568
          143. [0.522800]Serial:8250/16550driver,4ports,IRQsharingenabled
          144. [0.528945]omap_uart44e09000.serial:nowakeirqforuart0
          145. [0.529540]44e09000.serial:ttyO0atMMIO0x44e09000(irq=88,base_baud=3000000)isaOMAPUART0				   
				
            
                
			
							
            
                
			            
                            
              
            
          
		
          
		
          
		
          
		
          
		
          
			
            
				
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            			            AM335xTQ335x掛載Ramdis
                        
            
          
            
			
          
		
          	
		

	

          
	
	
          
		
          
			
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