U-Boot User Guide, Rev. 1.0
Contents
1. Page 32 ID 1046 1856 Rev 1 02. parameter hexadecimal x x gt address in RAM where data is to be read from size parameter hexadecimal x x gt length of data in bytes to be read rollback option executes manual rollback to previous firmware version Page 18 ID 1046 1856 Rev 1 0 U Boot Bootloader U Boot Usage fwum DESCRIPTION FirmWare Update Manager This command can be used to 1 Info show information about FWUM service present on IPMI firmware 2 Status show actual status of firmware banks 3 Upgrade download pointed firmware into MMC and initiate firmware upgrade procedure 4 Rollback initiate manual firmware rollback to switch back to previously used firmware WARNING Users requiring modification to the MMC s firmware are requested to contact Kontron for assistance before making any changes Query firmware service currently available COMMAND RESPONSE gt fwum info FWUM info Protocol Revision 07h Controller Device Id 00h Firmware Revision 1 01 Number Of Memory Bank 2 gt ID 1046 1856 Rev 1 0 Page 19 U Boot Usage m fwum Page 20 U Boot Bootloader FirmWare Update Manager Query the status of the currently available firmware images COMMAND RESPONSE gt fwum status FWUM status Bank State 0 Firmware Length Firmware Revision Last Known Good 143088 bytes 1 00 SDR 16 Previous Good 146864 bytes 1 00
3. Program is void and will automatically terminate your rights under this License However parties who have received copies or rights from you under this License will not have their licenses terminated so long as such parties remain in full compliance 5 You are not required to accept this License since you have not signed it However nothing else grants you permission to modify or distribute the Program or its derivative works These actions are prohibited by law if you do not accept this License Therefore by modifying or distributing the Program or any work based on the Program you indicate your acceptance of this License to do so and all its terms and conditions for copying distributing or modifying the Program or works based on it 6 Each time you redistribute the Program or any work based on the Program the recipient automatically receives a license from the original licensor to copy distribute or modify the Program subject to these terms and conditions You may not impose any further restrictions on the recipients exercise of the rights granted herein You are not responsible for enforcing compliance by third parties to this License 7 If as a consequence of a court judgment or allegation of patent infringement or for any other reason not limited to patent issues conditions are imposed on you whether by court order agreement or otherwise that contradict the conditions of this License they do not excuse you from the co
4. code for details You can redistribute U Boot and or modify it un der the terms of version 2 of the GNU General Public License as published by the Free Soft ware Foundation Most of it can also be distributed at your option under any later version of the GNU General Public License see individual files for exceptions NOTE This license does not cover the so called standalone applications that use U Boot services by means of the jump table provided by U Boot exactly for this purpose this is merely considered normal use of U Boot and does not fall under the heading of derived work The header files include image h and include asm u boot h define interfaces to U Boot In cluding these unmodified header files in another file is considered normal use of U Boot and does not fall under the heading of derived work Also note that the GPL below is copyrighted by the Free Software Foundation but the instance of code that it refers to the U Boot source code is copyrighted by me and others who actually wrote it Wolfgang Denk GNU GENERAL PUBLIC LICENSE Version 2 June 1991 Copyright C 1989 1991 Free Software Foundation Inc 59 Temple Place Suite 330 Boston MA 02111 1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document but changing it is not allowed Preamble The licenses for most software are designed to take away your freedom to share and change it By cont
5. enter the following command run update In the case of a U Boot update only the standard SPI NOR flash is updated The script netupdate tries to load a U Boot script update update from the server If found it is loaded to memory and executed as in the case of the SD card As the script netupdate requires access to a server the environment variable serverip must be set correctly Alternatively it is possible to use the dhcp or bootp commands An automatic run of the update script at every startup takes place if the update script is started in the preboot environment variable setenv preboot run update saveenv 6 9 Recovery Mechanism The are two SPI NOR flashes available with each device holding a copy of U Boot In case the contents of the standard SPI NOR flash have been corrupted e g as a result of a power failure during an update the IPMI subsystem detects the problem switches the flashes and restarts the CPU The board starts from the recovery SPI NOR flash In this state the standard SPI NOR flash can be programmed again with the update or netupdate scripts described in the previous chapter 6 8 Update The update scripts provided ensure that prior to the update the standard SPI NOR flash is se lected and the U Boot update image is available and correct The contents of the recovery SPI NOR flash should never be updated in order to avoid a com pletely inoperable system with no accessing capability
6. mmc rescan 0 ext2load mmc 0 100000 test img cp b 100000 0000000 filesize This example assumes that the size of test img is less than 64 kB The environment variable filesize is set automatically when a file is loaded to memory and can be used for convenience here ID 1046 1856 Rev 1 0 Page 29 U Boot Usage U Boot Bootloader m 6 6 Booting an OS 6 6 1 Booting Linux To boot Linux at least a kernel image and a FDT Flattened Device Tree must be loaded to memory Optionally an initrd can be loaded Furthermore a command line must be prepared in the environment variable bootargs The boot itself is initiated with the bootm command To simplify the setup of the board three predefined scripts are already programmed in the de fault environment nfsboot to boot from a tftp server and mount the root over NFS nandboot to boot from the NAND flash and also mount it as root sdboot to boot from a SD Card and also mount it as root For a one time only bootup this can be accomplished with the run command for example run nfsboot To make this permanent and have the board execute it automatically it must be stored in the bootcmd environment variable and the environment must be saved to flash Example setenv bootcmd run nandboot saveenv 6 6 2 Booting VxWorks To boot a Wind River VxWorks image a U Boot Image file of the corresponding ROM able VxWorks binary
7. the whole must be on the terms of this License whose permissions for other licensees extend to the entire whole and thus to each and every part regardless of who wrote it Thus it is not the intent of this section to claim rights or contest your rights to work written entirely by you rather the intent is to exercise the right to control the distribution of derivative or collective works based on the Program In addition mere aggregation of another work not based on the Program with the Program or with a work based on the Program on a volume of a storage or distribution medium does not bring the other work under the scope of this License 3 You may copy and distribute the Program or a work based on it under Section 2 in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following a Accompany it with the complete corresponding machine readable source code which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange or b Accompany it with a written offer valid for at least three years to give any third party for a charge no more than your cost of physically performing source distribution a complete machine readable copy of the corresponding source code to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange or c Accompany it with the information
8. their rights We protect your rights with two steps 1 copyright the software and 2 offer you this license which gives you legal permission to copy distribute and or modify the software Also for each author s protection and ours we want to make certain that everyone understands that there is no warranty for this free software If the software is modified by someone else and passed on we want its recipients to know that what they have is not the original so that any problems introduced by others will not reflect on the original authors reputations Finally any free program is threatened constantly by software patents We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses in effect making the program proprietary To prevent this we have made it clear that any patent must be licensed for everyone s free use or not licensed at all The precise terms and conditions for copying distribution and modification follow GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING DISTRIBUTION AND MODIFICATION 0 This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License The Program below refers to any such program or work and a work based on the Program means either the Program or any derivative work under copyright law that is to say a work containing the Prog
9. you received as to the offer to distribute corresponding source code This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer in accord with Subsection b above ID 1046 1856 Rev 1 0 Page 7 Preface U Boot Bootloader m The source code for a work means the preferred form of the work for making modifications to it For an executable work complete source code means all the source code for all modules it contains plus any associated interface definition files plus the scripts used to control compilation and installation of the executable However as a special exception the source code distributed need not include anything that is normally distributed in either source or binary form with the major components compiler kernel and so on of the operating system on which the executable runs unless that component itself accompanies the executable If distribution of executable or object code is made by offering access to copy from a designated place then offering equivalent access to copy the source code from the same place counts as distribution of the source code even though third parties are not compelled to copy the source along with the object code 4 You may not copy modify sublicense or distribute the Program except as expressly provided under this License Any attempt otherwise to copy modify sublicense or distribute the
10. 0000 0000 I G RWX 3d 00 80000000 1GB V Od gt e 80000000 0000 I G RWX 4d 00 ffc00000 256kB V 0d gt e ffc00000 0000 I G RWX 5d 00 0000000 64MB V Od gt f 0000000 0000 I G RWX 6d 00 8000000 16MB V Od gt f 8000000 0000 I G RWX 7d 00 ff000000 4kB V Od gt f 000000 0000 I G RWX 8d 00 c0000000 256MB V Od gt d c0000000 0000 I G RWX 9d 00 d0000000 256MB V Od d d0000000 0000 I G RWX 10d 00 fffff000 4kB V Od gt 0 1ffff000 0000 I G RWX Page 24 ID 1046 1856 Rev 1 0 U Boot Bootloader U Boot Usage 4 iO teu e HE Provides display and importing functions for vital product data entities vpd Vital Product Data SAI UE vpd print lt name gt import name all params where vpd command print option displays VPD information source System EEPROM if lt name gt is not used all VPD entities are displayed name parameter text string x x gt name of VPD entity addressed by option import X option imports VPD information to the U Boot Environment source System EEPROM target RAM all params parameter text constant all params selects all VPD entities for importing to the U Boot Environment ip leis le Vital Product Data are information stored in the System EEPROM which are required for proper operation of the board With this command the VPD entities can be displayed or imported to the U Boo
11. 1 b9 98 3a 00 00 dO 10 05 00 00 gt Response bytes first byte presents return NetFn combined with lun second presents command number third presents completion code further bytes are response data In this example the first byte 0x1c is decoded as lun 0 two least significant bits and NetFn 7 six most significant bits Send IPMI Get FRU Inventory Area command to get information about FRU 0 repository lun 0 NetFn 16 cmd 10 data byte 0x00 COMMAND RESPONSE gt kcs raw 0x0a 0x10 0x00 KCS transaction successfully completed rsp size 6 dec 2c 10 00 00 10 00 gt ID 1046 1856 Rev 1 0 Page 23 U Boot Usage U Boot Bootloader m tlbdbg Translation Look aside Buffer DeBuG ia i e38 e HE Displays current configuration of TLBO and TLB1 SI VG tlbdbg where tlbdbg command ip X eH This command provides information on the translation look aside buffers TLBO ad TLB1 for debugging purposes during U Boot development or for debugging OS startup issues Display TLBO TLB1 information COMMAND RESPONSE gt tlbdbg TLBx Configuration Register 04110200 101bc010 TLBO check 512 entries IDX PID EPN SIZE V TS RPN UO U3 WIMGE UUUSSS TLB1 check 16 entries IDX PID EPN SIZE V TS RPN UO U3 WIMGE UUUSSS Od 00 00000000 1GB V Od gt 0 00000000 0000 RWX 1d 00 40000000 1GB V Od gt 0 40000000 0000 RWX 2d 00 ffe00000 1MB V Od f ffe0
12. 1856 Rev 1 0 Page 21 U Boot Usage U Boot Bootloader m kcs Keyboard Controller Style aU es8 e HE Provides capability for transmitting raw IPMI commands from the pay load CPU to the MMC and displaying response from the MMC MAYE kcs raw lun lt lun gt NetFn lt CMD gt Request Data Bytes where kcs command raw option send raw data over KCS interface lun option if present set up desired lun number of message to send to MMC if absent lun is assumed to be 0 lun parameter hexadecimal parameter range lt 0 1 2 3 gt lt NetFn gt parameter hexadecimal x x gt lt CMD gt parameter hexadecimal Request Data parameter hexadecimal Bytes 1 n bytes space as delimiter between bytes command parameters fe9 gt 4 le Ba This command can be used to send IPMI commands in raw form to the MMC over the KCS interface and print response WARNING As ipmi raw functions provide access to the majority of MMC functionality care must be exercised when invoking raw commands Improper use may cause the board to become inoperable e g damage to FRU data Page 22 ID 1046 1856 Rev 1 0 U Boot Bootloader U Boot Usage kcs 4 Keyboard Controller Style Send IPMI Get Device ID command lun 0 NetFn 6 cmd 1 no data COMMAND RESPONSE gt kcs raw lun 0x00 0x06 0x01 KCS transaction successfully completed rsp size 18 dec lc 01 00 10 80 01 00 5
13. Free Software Foundation we sometimes make exceptions for this Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally NO WARRANTY BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE THERE IS NO WARRANTY FOR THE PROGRAM TO THE EXTENT PERMITTED BY APPLICABLE LAW EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND OR OTHER PARTIES PROVIDE THE PROGRAM AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU SHOULD THE PROGRAM PROVE DEFECTIVE YOU ASSUME THE COST OF ALL NECESSARY SERVICING REPAIR OR CORRECTION IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER OR ANY OTHER PARTY WHO MAY MODIFY AND OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE BE LIABLE TO YOU FOR DAMAGES INCLUDING ANY GENERAL SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES END OF TE
14. G kontron User Guide U Boot Bootloader User Guide for the AM4120 Doc ID 1046 1856 Rev 1 0 3 November 2011 If its embedded its Kontron Preface U Boot Bootloader m Revision History Publication Title U Boot Bootloader User Guide for the AM4120 Brief Description of Changes Date of Issue 1 0 Initial issue 3 Nov 2011 Imprint Kontron Modular Computers GmbH may be contacted via the following MAILING ADDRESS TELEPHONE AND E MAIL Kontron Modular Computers GmbH 49 0 800 SALESKONTRON Sudetenstrake 7 sales kontron com D 87600 Kaufbeuren Germany For further information about other Kontron products please visit our Internet web site www kontron com Disclaimer Copyright 2011 Kontron AG All rights reserved All data is for information purposes only and not guaranteed for legal purposes Information has been carefully checked and is believed to be accurate however no responsibility is assumed for inaccuracies Kontron and the Kontron logo and all other trademarks or registered trademarks are the property of their respective own ers and are recognized Specifications are subject to change without notice Page 2 ID 1046 1856 Rev 1 0 U Boot Bootloader Table of Contents PROVISION HIStory AI Un P Ber GE Tabl of Contents s Copyrights and Licensing aucsnscicidutisuq
15. PONSE gt flsw standard boot flash active gt Select standard SPI NOR flash as currently active flash COMMAND RESPONSE gt flsw s gt ID 1046 1856 Rev 1 0 Page 15 U Boot Usage U Boot Bootloader m fru FUNCTION SYNTAX DESCRIPTION Page 16 Field Replaceable Unit Provides read write access to the board s FRU repository as well as displaying FRU data fru info FRU nr read FRU nr address size write FRU nr address size where fru command info option displays FRU data for FRU nr specified FRUnr parameter hexadecimal 0 1 n gt identification number of FRU device for option specified read option reads FRU data for FRU nr specified address parameter hexadecimal lt x x gt address where data is to be stored or read from size parameter hexadecimal lt x x gt length of data in bytes to be read or written write option writes FRU data to lt FRU nr gt specified This command can be used to display basic information about the FRU repository read out the repository content to RAM and if required to update the contents of the FRU repository WARNING Writing incorrect FRU data to the FRU repository can result in an inoperable board E Keying information incorrect Users requiring modification to the board s FRU data are requested to contact Kontron for assistance before making any
16. RMS AND CONDITIONS E ID 1046 1856 Rev 1 0 Page 9 Preface U Boot Bootloader Obtaining Source Code The software included in this product contains copyrighted software that is licensed under the GPL A copy of that license is included in this document beginning on page 5 You may obtain the complete Corresponding Source code from Kontron for a period of three years after our last shipment of this product Please contact Kontron Support for further assistance in obtaining the source code Page 10 ID 1046 1856 Rev 1 0 U Boot Bootloader U Boot Usage U Boot is an open source boot loader software developed and maintained by DENX Software Engineering GmbH http www denx de Kontron provides U Boot with all its standard fea tures as well as Kontron specific features for usage with Kontron s Freescale QorlQ P series based AMC CPU modules This user guide provides specific information on Kontron s implementation of U Boot and its usage Please refer to the DENX website for up to date on line documentation of all of U Boot s standard features 1 Introduction to U Boot 2 Standard U Boot Commands U Boot is provided with a library of standard commands for which documentation is provided on the DENX website Some of the below listed standard commands have sub groups which can be displayed when help for the main group command is requested Where relevant further information concerning the usage of standard commands is p
17. SDR 32 Bank State 1 Firmware Length Firmware Revision gt Upgrade MMC firmware COMMAND RESPONSE gt fwum upgrade 0x20000000 0x22ef0 Start uploading firmware into bank 0 Loading HHHH HHHH HHHH HHHH HHHH FETE EEE EE HEHE HF TET ETHER ERE HERE THERE HEE EE HEE EE TH TET ETHER ERE IEEE THERE EERE EH HHH EE E TEE EHE EIE HHHH THERE HEE EH tH HE EH HEHEH HH HH HH HH HH THERE RHE HHHH HHHH E TET HETEHERE ERE HEBEERE THERE EERE HHEH HHHH HH EEHEHE HHHHEH EE THERE EHHH HHHH HHHH HH TEE ETHER ERE IEEE THERE EHHH HHHH HHHH HH HEHEH HEHE HH ERE HH EH HHHH HHH HHHH Firmware update initiated gt Perform manual rollback of MMC firmware COMMAND RESPONSE gt fwum rollback Firmware rollback initiated gt ID 1046 1856 Rev 1 0 U Boot Bootloader U Boot Usage kboardinfo Kontron BOARD INFO aU less e HI Displays a summary of board and configuration information SI kboardinfo where kboardinfo command p fe9 51 ele Be This command collects information from various board sources and provides a summary listing of this information UE Ye Sy Display board information COMMAND RESPONSE gt kboardinfo Board id 0xd040 Hardware rev 0x0 Logic rev 0x1 Boot flash Recovery Flash In system slot na Geographic address 5 Material number na Serial number na U Boot article name SK FIRM UBOOT D0401 U Boot material num 1046 1471 gt ID 1046
18. also meet all of these conditions a You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change b You must cause any work that you distribute or publish that in whole or in part contains or is derived from the Program or any part thereof to be licensed as a whole at no charge to all third parties under the terms of this License C If the modified program normally reads commands interactively when run you must cause it when started running for such interactive use in the most ordinary way to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty or else saying that you provide a warranty and that users may redistribute the program under these conditions and telling the user how to view a copy of this License Exception if the Program itself is interactive but does not normally print such an announcement your work based on the Program is not required to print an announcement These requirements apply to the modified work as a whole If identifiable sections of that work are not derived from the Program and can be reasonably considered independent and separate works in themselves then this License and its terms do not apply to those sections when you distribute them as separate works But when you distribute the same sections as part of a whole which is a work based on the Program the distribution of
19. changes Query FRU data for FRU 0 COMMAND RESPONSE gt fru info 0 FRU 0 size is 0x1000 bytes ID 1046 1856 Rev 1 0 U Boot Bootloader U Boot Usage fru Field Replaceable Unit Read FRU data for FRU 0 COMMAND RESPONSE gt fru read 0x0 0x1000000 0x1000 Progress fi E EHH HEHEHHE EHEHE EHHH HHEH HHHH HHH HEHEHE RRHE ERE ERE HERE HHHH HHHH HHH HHHEHETRRHE ER EE ERE EHHH HHHH EH RE HE HEHEHE RRHE ERR RE HERE HHH EHR E HHH HEHEHE RRE EERE REE EERE RE ERE gt Write FRU data to FRU 0 COMMAND RESPONSE gt fru write 0x0 0x1000000 0x1000 Progress HHHHHHHHFFFFEFEHEHHHEEEEEEHEHEEHEE 4 THETHEH HE E 3 1 3 3 3 4 B BERE HE E 3 3 3 3 A B BEER E E HH H THETHEH E E E 1 3 B BIBHEIEE E E 3 3 3 3 3 4 4 E B 4 H THEHEH HE E 3 1 3 3 AB B BEER HE HE E 3 3 3 3 3 4 B B EIE HHHH H THETHEH HE E 3 1 3 TB B IBBIEE E E 3 3 3 3 3 4 4 B I HE ID 1046 1856 Rev 1 0 Page 17 U Boot Usage U Boot Bootloader m fwum FirmWare Update Manager uh lead e HE Provides functions for managing and updating the module s MMC firmware SIC fwum info status upgrade address lt size gt rollback where fru command info option displays information concerning fwum services status option displays information concerning the status of fwum services upgrade option updates MMC firmware using parameters as specified by address and size address
20. e note that the resulting U Boot image contains all needed information for a proper U Boot load process and start of the contained VxWorks binary ROM able image Therefore itis strongly recommended to utilize the corresponding U Boot image listed above when using U Boot for booting VxWorks The VxWorks U Boot image file and FDT are typically stored in and loaded from onboard par allel NOR flash The boot itself is initiated with the bootm command To perform autobooting of a VxWorks im age requires that appropriate U Boot environment variables or script s be defined for the boot operation to be performed For more detailled information with examples of boot command se quences refer to the Kontron VxWorks BSP online documentation For more information on how to configure and build VxWorks images and how to utilize them e g for a subsequent VxWorks boot process please refer to the appropriate Wind River doc umentation 6 7 Getting Help U Boot was configured with support for longhelp That means that for every command online help is available while working with the system To access the online help enter or help at the console prompt This will show an overview over all available commands To get specific help enter command command group or help command command group For example to get help on the saves command enter saves gt saves saves save S Record file over serial line Usage saves of
21. ed U Boot pauses for the time defined in the environment variable bootdelay and then executes the statements stored in the environment variable bootcmd To gain access to the U Boot command prompt type in any single character during the boot delay time If required the boot delay function can be so configured that even when the boot delay is set to 0 to have characters which are sent over the serial interface prior to the boot wait time be recognized to allow operator intervention in the boot process 5 Environment The Environment is stored in the same flash as U Boot usually in the last sector This provides the possibility to update U Boot without changing the Environment The environment can be modified by the user with the typical commands of the env command group setenv editenv printenv and saveenv Furthermore if a larger number of boards require updating the environment can be updated by a script loaded from the SD card onboard NAND flash or a network A typical user modification would be to set the variable bootcmd so that the user s OS will boot automatically 6 Working with U Boot 6 1 General Operation Most operations are carried out using the main memory as an intermediate step It is not pos sible for example to boot a kernel image directly from a tftp server Instead the kernel image is first loaded to memory and then booted from there with another command The same is true when writ
22. f size baud save S Record file over serial line with offset off size size and baudrate baud gt To get help on the mmc command group enter mmc gt mmc mmc MMC sub system Usage mmc read lt device num gt addr blk cnt mmc write lt device num gt addr blk cnt mmc rescan lt device num gt mmc part lt device num gt lists available partition on mmc mmc list lists available devices gt ID 1046 1856 Rev 1 0 Page 31 U Boot Usage U Boot Bootloader m 6 8 Update The environment contains two scripts which allow an update of various components e g U Boot bootrom for VxWorks data in E2PROMS etc The script update checks for a U Boot script update in the directory update in the first par tition of the SD card with ext2 or fat filesystem If unsuccessful the check continues with the first NAND chip volume boot and again U Boot searches in the subdirectory update for the script update If the script update is found it is loaded to memory and executed So to actually execute an update e g a SD card should be prepared with a directory update on the first partition Kontron provides an update e g for U Boot as a compressed archive zip tar bz2 tar gz which must be unpacked in the directory update After the SD card is inserted U Boot should be stopped at the console after power up To man ually start the update
23. he filesystem and its contents must be prepared with Linux first As a prerequisite the environment variables mtdids and mtdparts must be set correctly mtdids identifies the NAND chip to use while mtdparts defines the partitions Example setenv mtdids nand0 chip1 setenv mtdparts mtdparts chipl all This defines the first NAND chip nandO to be used with the name chip1 The chip contains one partition all which occupies the whole chip The next command sets the partition all to be used with the ubi layer ubi part all Now an ubi volume can be mounted in this example volume boot ubifsmount boot After the volume is mounted its contents can be listed ubifsls or a file loaded in this case kernel bin to address 0x100000 ubifsload 100000 kernel bin 6 5 Using the Onboard Parallel NOR Flash The onboard parallel NOR flash is not used together with a file system it is used raw It does not contain any U Boot components and is completely free for the user usage It s primary func tion is to store VxWorks bootroms and images To program an image to the NOR flash it must first be loaded to memory from an arbitrary source It can then be programmed with the cp command The flash must be erased before the NOR flash is programmed To achieve this use the erase command Example Programming a test file test img from an SD card using the ext2 file system erase 0000000 fOOOffff
24. image and an FDT Flattened Device Tree must be loaded to memory By default U Boot operates on ulmage files U Boot Image which contain a special header and in the data portion the operating system binary image The special header defines various properties of the U Boot image e g load address and entry point for the binary image in the data portion Both the header and the data portion of the U Boot image are secured and checked against corruption by a CRC32 checksum at U Boot load time All VxWorks ROM able binary images will be converted to an U Boot image at build time of the suiting Wind River Workbench projects based on the dedicated Kontron Modular Computers VxWorks BSP Board Support Package This conversion will be carried out by a Kontron Modular Computers JAVA based version of the U Boot tool mklmage which is invoked by BSP provided Wind River Workbench project settings automatically On successful build of the VxWorks binary ROM able image an additional U Boot image file containing the VxWorks ROM able binary image will be generated in the project default build folder with the following naming conventions U BOOT IMAGE NAME VXWORKS IMAGE NAME ulmage bootrom bin bootrom bin ulmage bootrom_uncmp bin bootrom_uncmp bin ulmage vxWorks_rom bin vxWorks_rom bin ulmage vxWorks_romCompress bin vxWorks romCompress bin Page 30 ID 1046 1856 Rev 1 0 U Boot Bootloader U Boot Usage Pleas
25. ing new contents to the SPI NOR flashes This concept is very flexible since it separates the commands which handle the loading of data from the commands that carry out actions like booting 6 2 Using the Network U Boot provides support for multiple Ethernet interfaces for transferring files from a file server This is accomplished using the environment variables ethact and ethrotate ethact is used to select the required interface In the case of the AM4120 this is as follows e ethact eTSEC1 interface is the front panel connector J2 B ethact eTSEC2 interface is either AMC port 1 or the front panel connector J3 A depends of the hardware configuration settable per DIP switch ethact eTSEC3 interface is AMC port 0 ID 1046 1856 Rev 1 0 Page 27 U Boot Usage U Boot Bootloader m ethrotate can be used to force the selection of the next available interface if for example there is no link available for the selected interface If set to yes default is no U Boot provides a status message that the next interface is se lected and updates the ethact variable accordingly U Boot then tries to download the file again This is repeated until either the file is downloaded or all interfaces have been exhausted In the event the link is active for the selected interface and ethrotate is yes U Boot tries to download the file If it cannot download the file it tries the next available
26. int FLASH memory information fsinfo Print information about filesystems fsload Load binary file from a filesystem image go Start application at address addr help Print command description usage i2c 12C subsystem iminfo Print header information for application image imls List all images found in flash imxtract Extract a part of a multi image interrupts Enable or disable interrupts irqinfo Print information about IRQs itest Return true false on integer compare loadb Load binary file over serial line kermit mode loads Load S Record file over serial line loady Load binary file over serial line ymodem mode loop Infinite loop on address range Is List files in a directory default md Memory display Page 12 ID 1046 1856 Rev 1 0 U Boot Bootloader Table 1 Standard U Boot Commands U Boot Usage COMMAND DESCRIPTION md5sum Create check md5sum message digest mii MII utility commands mm Memory modify auto incrementing address mmc MMC sub system mmcinfo Display MMC info mtdparts Define flash nand partitions mtest Simple RAM read write test mw Memory write fill nand NAND subsystem nboot Boot from NAND device nm Memory modify constant address pci List and access PCI Configuration Space ping Send ICMP ECHO_REQUEST to network host printenv Print environment variables protect Enable or disable FLASH write pro
27. interface If the file is not available on the server U Boot stops trying and issues an error message In addition to be able to transfer files from a tftp server to a module the module s IP address environment variable ipaddr and the IP address of the server must be set environment vari able serverip Alternatively it is possible to use the dhcp or bootp commands They can be set using the setenv command Please note that these settings are lost after a reset To retain the environment permanently use the command saveenv which saves the complete environment to flash To transfer a file from a tftp server to memory the tftpboot command is used for example tftpboot 100000 filename 6 3 Using SD Cards SD Cards are supported read only with the ext2 or fat file system In both cases the card must be rescanned first mmc rescan 0 After that the contents can be verified with ext21s mmc 0 in case of the ext2 file system or fatls mmc 0 in case of the fat file system To load a file into memory the commands ext2load or fatload can be used for example ext2load mmc 0 100000 kernel bin which loads the file kernel bin from the SD card to memory address 0x100000 Page 28 ID 1046 1856 Rev 1 0 U Boot Bootloader U Boot Usage 6 4 Using the Onboard NAND Flash The onboard NAND Flash is supported with the ubi filesystem The access is read only so t
28. ly clear what is believed to be a consequence of the rest of this License If the distribution and or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries so that distribution is permitted only in or among countries not thus excluded In such case this License incorporates the limitation as if written in the body of this License The Free Software Foundation may publish revised and or new versions of the General Public License from time to time Such new versions will be similar in spirit to the present version but may differ in detail to address new problems or concerns Each version is given a distinguishing version number If the Program specifies a version number of this License which applies to it and any later version you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation If the Program does not specify a version number of this License you may choose any version ever published by the Free Software Foundation If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different write to the author to ask for permission For software which is copyrighted by the Free Software Foundation write to the
29. nditions of this License If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations then as a consequence you may not distribute the Program at all For example if a patent license would not permit royalty free redistribution of the Program by all those who receive copies directly or indirectly through you then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program If any portion of this section is held invalid or unenforceable under any particular circumstance the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims this section has the sole purpose of protecting the integrity of the free software distribution system which is implemented by public license practices Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system it is up to the author donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice Page 8 ID 1046 1856 Rev 1 0 U Boot Bootloader Preface 10 11 12 This section is intended to make thorough
30. peti tatis ede iabcesu peru tuti c Ide scm Obtaining Source Code Pc 1 Introduction to U Boot eee enne 2 Standard U Boot Commands 3 Kontron Specific Commands 31 Command LISE mr 3 2 Command Syntax Reference eene 4 U Boot Access and Startup 9 BAVINONINGHE iui EE ent opo ee te 6 Working with U Boot onse 6 1 General Operation usse teni R PK ERPR UE ER oe ERSRS AR RR RR 6 2 Using the Network esee eene unita ta sh e ihn aano naa Od Using SD Cards na dou OM DIA NM Ida PEN DENN 6 4 Using the Onboard NAND Flash sss 6 5 Using the Onboard Parallel NOR Flash 6 6 Booting an OS sorier 6 6 1 Booting LINUX ssichecisassctocsisrerencscisniscivusaeeedanaseideseieess 6 6 2 Booting VXVVOFTKS cas cccmiceicicsocacmniuseansaiMasaiiniensone 6 7 G tting Help EC RE 6 6 So seredes ae aE A 6 9 Recovery Mechanism scccccccesrcecoccetecetuspanseerioenccntniatoenincnaneee ID 1046 1856 Rev 1 0 Preface Page 3 Preface U Boot Bootloader This page has been intentionally left blank Page 4 ID 1046 1856 Rev 1 0 U Boot Bootloader Preface Copyrights and Licensing U Boot is Free Software It is copyrighted by Wolfgang Denk and many others who contributed code see the actual source
31. ram or a portion of it either verbatim or with modifications and or translated into another language Hereinafter translation is included without limitation in the term modification Each licensee is addressed as you Activities other than copying distribution and modification are not covered by this License they are outside its scope The act of running the Program is not restricted and the output from the Program is covered only if its contents constitute a work based on the Program independent of having been made by running the Program Whether that is true depends on what the Program does 1 You may copy and distribute verbatim copies of the Program s source code as you receive it in any medium provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty keep intact all the notices that refer to this License and to the absence of any warranty and give any other recipients of the Program a copy of this License along with the Program You may charge a fee for the physical act of transferring a copy and you may at your option offer warranty protection in exchange for a fee Page 6 ID 1046 1856 Rev 1 0 U Boot Bootloader Preface 2 You may modify your copy or copies of the Program or any portion of it thus forming a work based on the Program and copy and distribute such modifications or work under the terms of Section 1 above provided that you
32. rast the GNU General Public License is intended to guarantee your freedom to share and change free software to make sure the software is free for all its users This General Pub lic License applies to most of the Free Software Foundation s software and to any other pro gram whose authors commit to using it Some other Free Software Foundation software is covered by the GNU Library General Public License instead You can apply it to your pro grams too When we speak of free software we are referring to freedom not price Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free soft ware and charge for this service if you wish that you receive source code or can get it if you want it that you can change the software or use pieces of it in new free programs and that you know you can do these things E ID 1046 1856 Rev 1 0 Page 5 Preface U Boot Bootloader m To protect your rights we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights These restrictions translate to certain responsibilities for you if you distribute copies of the software or if you modify it For example if you distribute copies of such a program whether gratis or for a fee you must give the recipients all the rights that you have You must make sure that they too receive or can get the source code And you must show them these terms so they know
33. rovided in this guide to assist users in performing specific functions Table 1 Standard U Boot Commands COMMAND DESCRIPTION Alias for help base Print or set address offset bdinfo Print Board Info structure boot Boot default i e run bootcmd bootd Boot default i e run bootcmd bootelf Boot from an ELF image in memory bootm Boot application image from memory bootp Boot image via network using BOOTP TFTP protocol bootvx Boot vxWorks from an ELF image chpart Change active partition cmp Memory compare coninfo Print console devices and information cp Memory copy cpu Multiprocessor CPU boot manipulation and release crc32 Checksum calculation dhcp Boot image via network using DHCP TFTP protocol echo Echo args to console ID 1046 1856 Rev 1 0 Page 11 U Boot Usage m Table 1 Standard U Boot Commands U Boot Bootloader COMMAND DESCRIPTION editenv Edit environment variable env Environment handling commands erase Erase FLASH memory exit Exit script ext2load Load binary file from a Ext2 filesystem ext2ls List files in a directory default false Do nothing unsuccessfully fatinfo Print information about filesystem fatload Load binary file from a dos filesystem fatls List files in a directory default fdt Flattened device tree utility commands flinfo Pr
34. t Environment in RAM Among the VPD entities are for example the board serial number and the board s Ethernet MAC addresses If the option import is invoked existing VPD entities in the Environment in RAM are overwritten If a saveenv is then invoked the previously stored values in the currently active SPI NOR flash Environment area are overwritten Display all VPD entities COMMAND RESPONSE gt vpd print response displays all VPD entities ID 1046 1856 Rev 1 0 Page 25 U Boot Usage U Boot Bootloader m vpd Vital Product Data Display eth1addr entity COMMAND RESPONSE gt vpd print ethladdr ethladdr 00 80 82 47 12 02 Import eth1 addr entity to Environment COMMAND RESPONSE gt vpd import ethladdr import ethladdr 00 80 82 47 12 02 to Environment Import all VPD entities to Environment COMMAND RESPONSE gt vpd import all params lt response displays all imported VPD entities format for each imported VPD entity as follows gt import lt name gt lt value gt to Environment import lt name gt lt value gt to Environment Page 26 ID 1046 1856 Rev 1 0 U Boot Bootloader U Boot Usage 4 U Boot Access and Startup Communication with U Boot is achieved via a serial console configured for 115200 baud 8N1 Initially U Boot executes the commands defined in the environment variable preboot Then if not otherwise interrupt
35. tax Reference The following provides command syntax reference information a short description and in some cases usage examples Where an ellipsis appears in the command syntax it means that the command is continued on the next line Observe spaces before the ellipsis Page 14 ID 1046 1856 Rev 1 0 U Boot Bootloader U Boot Usage flsw FUNCTION SYNTAX DESCRIPTION 4 FLash SWitch Indicate or select currently active SPI NOR flash flsw s r where flsw command issuing the command without arguments will indicate the currently active SPI NOR flash also returns true or false depending on currently active flash S option standard selects the standard SPI NOR flash as the active flash r option recovery selects the recovery SPI NOR flash as the active flash This command is used to determined the currently active SPI NOR flash or to select either the standard SPI NOR flash or the recovery SPI NOR flash as the currently active flash In addition this command returns true if the standard SPI NOR flash is selected or false if the recovery SPI NOR flash is selected This is used in the update scripts to prevent the recovery flash from being updated Besides this command the currently active SPI NOR flash may also be selected either via a DIP Switch setting or IPMI OEM command The output of this command always shows the current state Query flash status COMMAND RES
36. tection reginfo Print register information reset Perform RESET of the CPU run Run commands in an environment variable saveenv Save environment variables to persistent storage saves Save S Record file over serial line setenv Set environment variables setexpr Set environment variable as the result of eval expression sf SPI flash subsystem showvar Print local hushshell variables sleep Delay execution for some time source Run script from memory test Minimal test like bin sh tftpboot Boot image via network using TFTP protocol true Do nothing successfully ID 1046 1856 Rev 1 0 Page 13 U Boot Usage U Boot Bootloader m Table 1 Standard U Boot Commands COMMAND DESCRIPTION ubi ubi commands ubifsload Load file from an UBIFS filesystem ubifsls List files in a directory ubifsmount Mount UBIFS volume ubifsumount Unmount UBIFS volume version Print monitor compiler and linker version 3 Kontron Specific Commands 3 1 Command List Kontron s implementation of U Boot includes certain enhancements to provide specific func tions not incorporated in the U Boot standard library The following additional functions have been implemented in U Boot flsw FLash SWitch e fru Field Replaceable Unit fwum FirmWare Update Manager kboardinfo Kontron BOARDINFO kcs Keyboard Controller Style tlbdbg Translation Look aside Buffer DeBuG vpd Vital Product Data 3 2 Command Syn
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