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Diffstat (limited to 'doc/README.sbc8349')
| -rw-r--r-- | doc/README.sbc8349 | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/doc/README.sbc8349 b/doc/README.sbc8349 index a0ac638..908e768 100644 --- a/doc/README.sbc8349 +++ b/doc/README.sbc8349 @@ -21,15 +21,22 @@ Flash Details: The flash type is intel 28F640Jx (4096x16) [one device]. Base address is 0xFF80_0000 which is also where the Hardware Reset Configuration -Word (HRCW) is stored. Caution should be used to not overwrite the -HRCW, or "CF RCW" with a Wind River ICE will be required to restore -the HRCW and allow the board to enter background mode for further -steps in the flash process. +Word (HRCW) is stored. Caution should be used to not reset the +board without having a valid HRCW in place (i.e. erased flash) as +then a Wind River ICE will be required to restore the HRCW and flash +image. Restoring a corrupted or missing flash image: ============================================= +Note that U-boot versions up to and including 2009.06 had essentially +two copies of u-boot in flash; one at the very beginning, which set +the HRCW, and one at the very end, which was the image that was run. +As of this point in time, the two have been combined into just one +at the beginning of flash, which provides both the HRCW, and the image +that is executed. This frees up the remainder of flash for other uses. +Use of the u-boot command "fli" will indicate what parts are in use. Details for storing U-boot to flash using a Wind River ICE can be found on page 19 of the board manual (request ERG-00328-001). The following is a summary of that information: @@ -39,9 +46,9 @@ is a summary of that information: - 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 + Convert from FF80_0000 to FFFF_FFFF (or to FF83_FFFF if you are + trying to preserve your old environment settings and user flash). + - Set the start address of the erase/flash process to FF80_0000 - Set the target RAM required to 64kB. - Select sectors for erasing (see note on enviroment below) - Select Erase and Reprogram. @@ -59,7 +66,7 @@ beginning with "SCGA TSEC1" and "SCGA TSEC2". This allows you to use 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. +then convert (and erase to) 0xFF83FFFF instead of 0xFFFFFFFF. The size for converting (and erasing) must be at least as large as u-boot.bin. @@ -73,10 +80,13 @@ has 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 + erase ff800000 ff83ffff + cp.b 200000 ff800000 40000 protect on all +You may wish to do a "md ff800000 20" operation as a prefix and postfix +to the above steps to inspect/compare the HRCW before/after as an extra +safety check before resetting the board upon completion of the reflash. PCI: ==== |