Digi 9P 9360/9750 Set bootargs to be passed to the kernel, Download the kernel to RAM via Tftp

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#run boot_net

This script does three steps (that you can also do manually):

Step 1: Set bootargs to be passed to the kernel

The environmental variable bootargs must be updated to tell Linux that the rootfs is taken via NFS. To manually do this enter the following commands (it is supposed that the network variables serverip and nfspath have been already set). The values for ip and console have to be filled depending on the platform.

#setenv bootargs nfsroot=$(serverip):$(nfspath) root=nfs ip=... console=...

#saveenv

Step 2: Download the kernel to RAM via TFTP

The following commands download the “/tftpboot/uImage-unc90” image to RAM memory

#tftp 20100000 uImage-unc90dev

Step 3: Launch the kernel from RAM

Now that the kernel image has been downloaded to RAM, we can execute Linux with the following command

#bootm 20100000

Remember that you must have the U-Boot network environment variables properly configured (ipaddr, serverip,...).

5 6	L x N E T E S U s e r ’ s G u i d e

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Contents LxNETES User’s Guide ConnectCore 9P 9360/9750 Page Page Page Contents Building the First Project Interfaces & Devices Appendix B Cross-development environment IntroductionOverview Example applications Linux kernel sourcesTemplate project What’s new in LxNETES 3.2? FeaturesGeneral features RTC Gpio Conventions used in this manual This is a tip. It contains useful information about a topicAcronyms and abbreviations System requirements RequirementsSystem Requirements/Prerequisites Disk space Optional but recommended componentsApplications & Services Tftp daemonNFS server JTAG-Booster N E T E S U s e r ’ s G u i d e Introduction Connecting host PC with development boardGetting Started Minicom SeyonConnect power Seyon SettingsTest Ethernet configuration Installing LxNETES # ifconfig eth0Guided Installation Manual Installation N u a l Installation Building the First Project Building the Default ProjectRun configure Run make install Run makeAdding your own applications Application DevelopmentWriting applications Display Using C++Included example applications Proc/cpuinfo contents Debugging applications Choose the right architecture for your target Included pre-built applications Shell applications busyboxTelnet daemon utelnetd Web server BoaNano-X/microwindows Embedded QtUseful applications MemWhat is a kernel module? Kernel DevelopmentWriting kernel modules Writing your own kernel modulesIncluded Kernel modules Minimal Add the module to the build environmentBuilding and loading of kernel modules Modifying the default project Advanced TopicsD i f y i n g t h e d e Fault p r o j e c t Building a custom project Introduction Boot processBoot ConnectCore 9P 9360/9750 Bank # 0 00000000 32 MBLinux boot methods NAND-FlashNOR Flash USBLinux boot process MMUV a n c e d T o p i c s Updating the Flash memory Passing arguments to the kernelAutomating the image download Updating a running system the easy way Updating a running system manuallyWrite the image to Flash Download the new image file to RAMErase the Flash partition Root File System BootKernel Updating a corrupted system using a debugger Root File System Types Launch the kernel from RAM Set bootargs to be passed to the kernelDownload the kernel to RAM via Tftp JFFS2 Copy the kernel to RAM O t F i l e S y s t e m T y p e s N E T E S U s e r ’ s G u i d e Interfaces & Devices Serial interfaceUSB host interface I2C interfaceSPI interface LCD interfaceHow to set the initial system date and time Compact flash interfaceSD card interface Real time clock RTCPCI interface Related documentation CD contentsAppendix a Install.sh Readme.txtRelNotes.txt Docs ImagesSetup ConnectCore 9P 9360 CC9P9360ConnectCore 9P 9750 CC9P9750 HardwareMemory layouts Flash memory layoutConnectCore 9P 9360 / ConnectCore 9P Sdram memory layoutTextbase N E T E S U s e r ’ s G u i d e Boot command reference Appendix BO o t c o m m a n d r e f e r e n c e Skipped CC9C CCXP270 UNC90 User keys Example A9M24x0