U-Boot for Wind River SBC834x Boards	====================================The Wind River SBC834x board is a 6U form factor (not CPCI) referencedesign that uses the MPC8347E or MPC8349E processor.  U-Boot supportfor this board is heavily based on the existing U-Boot support forFreescale MPC8349 reference boards.Support has been primarily tested on the SBC8349 version of the board,although earlier versions were also tested on the SBC8347.  The primarydifference in the two is the level of PCI functionality.	http://www.windriver.com/products/OCD/SBC8347E_49E/Flash Details:==============The flash type is intel 28F640Jx (4096x16) [one device].  Base addressis 0xFF80_0000 which is also where the Hardware Reset ConfigurationWord (HRCW) is stored.  Caution should be used to not overwrite theHRCW, or "CF RCW" with a Wind River ICE will be required to restorethe HRCW and allow the board to enter background mode for furthersteps in the flash process.Restoring a corrupted or missing flash image:=============================================Details for storing U-boot to flash using a Wind River ICE can be foundon page 19 of the board manual (request ERG-00328-001).  The followingis a summary of that information:  - Connect ICE and establish connection to it from WorkBench/OCD.  - Ensure you have background mode (BKM) in the OCD terminal window.  - Select the appropriate flash type (listed above)  - Prepare a u-boot image by using the Wind River Convert utility;    by using "Convert and Add file" on the ELF file from your build.    Convert from FFF0_0000 to FFFF_FFFF (or to FFF3_FFFF if you are    trying to preserve your old environment settings).  - Set the start address of the erase/flash process to FFF0_0000  - Set the target RAM required to 64kB.  - Select sectors for erasing (see note on enviroment below)  - Select Erase and Reprogram.Note that some versions of the register files used with Workbenchwould zero some TSEC registers, which inhibits ethernet operationby u-boot when this register file is played to the target.  Using"INN" in the OCD terminal window instead of "IN" before the "GO"will not play the register file, and allow u-boot to use the TSECinterface while executed from the ICE "GO" command.Alternatively, you can locate the register file which will be namedWRS_SBC8349_PCT00328001.reg or similar) and "REM" out all the linesbeginning with "SCGA TSEC1" and "SCGA TSEC2".  This allows you touse all the remaining register file content.If you wish to preserve your prior U-Boot environment settings,then convert (and erase to) 0xFFF3FFFF instead of 0xFFFFFFFF.The size for converting (and erasing) must be at least as largeas u-boot.bin.Updating U-Boot with U-Boot:============================This procedure is very similar to other boards that have u-boot installed.Assuming that the network has been configured, and that the new u-boot.binhas been copied to the TFTP server, the commands are:	tftp 200000 u-boot.bin	protect off all	erase fff00000 fff3ffff	cp.b 200000 fff00000 3ffff	protect on allPCI:====This board and U-Boot have been tested with PCI built in, on a SBC8349and confirmed that the "pci" command showed the intel e1000 that waspresent in the PCI slot.  Note that if a 33MHz 32bit card is insertedin the slot, then the whole board will clock down to a 33MHz baseclock instead of the default 66MHz.  This will change the baud clocksand mess up your serial console output.  If you want to use a 33MHz PCIcard, then you should build a U-Boot with #undef PCI_66M in theinclude/configs/sbc8349.h and store this to flash prior to powering downthe board and inserting the 33MHz PCI card.By default PCI support is disabled to better support very earlyrevision MPC834x chips with possible PCI issues.  Also PCI support isuntested on the sbc8347 variants at this point in time.						Paul Gortmaker, 01/2007