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ecdc3df611
Between v2015.07-rc1 and v2015.07-rc2 this board started silent boot failure. A bisect led to commit6eed3786c6("net: Move the CMD_NET config to defconfigs"). This commit looks harmless in itself, but it did implicitly add a feature to the image which led to this: u-boot$git describe6eed3786c6v2015.07-rc1-412-g6eed3786c68c ^^^ u-boot$ls -l ../41*/u-boot.bin -rwxrwxr-x 1 paul paul 261476 Oct 16 16:47 ../411/u-boot.bin -rwxrwxr-x 1 paul paul 266392 Oct 16 16:43 ../412/u-boot.bin u-boot$bc bc 1.06.95 Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc. This is free software with ABSOLUTELY NO WARRANTY. For details type `warranty'. 256*1024 262144 i.e. we finally broke through the 256k monitor size. Jump it up to 384k and fix the hard coded value used in the env offset at the same time. We were probably flirting with the 256k size issue without knowing it when testing on different baselines in earlier commits, but since this is all board specific, a rebase or reorder to put this commit 1st is of little value. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
49 lines
1.7 KiB
Text
49 lines
1.7 KiB
Text
Wind River SBC8641D reference board
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===========================
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Created 06/14/2007 Joe Hamman
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Copyright 2007, Embedded Specialties, Inc.
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Copyright 2007 Wind River Systems, Inc.
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-----------------------------
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1. Building U-Boot
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------------------
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The SBC8641D code is known to build using ELDK 4.1.
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$ make sbc8641d_config
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Configuring for sbc8641d board...
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$ make
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2. Switch and Jumper Settings
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-----------------------------
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All Jumpers & Switches are in their default positions. Please refer to
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the board documentation for details. Some settings control CPU voltages
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and settings may change with board revisions.
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3. Known limitations
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--------------------
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PCI:
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The PCI command may hang if no boards are present in either slot.
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4. Reflashing U-Boot
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--------------------
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The board has two independent flash devices which can be used for dual
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booting, or for u-boot backup and recovery. A two pin jumper on the
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three pin JP10 determines which device is attached to /CS0 line.
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Assuming one device has a functional u-boot, and the other device has
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a recently installed non-functional image, to perform a recovery from
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that non-functional image goes essentially as follows:
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a) power down the board and jumper JP10 to select the functional image.
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b) power on the board and let it get to u-boot prompt.
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c) while on, using static precautions, move JP10 back to the failed image.
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d) use "md fff00000" to confirm you are looking at the failed image
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e) turn off write protect with "prot off all"
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f) get new image, i.e. "tftp 200000 /somepath/u-boot.bin"
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g) erase failed image: "erase FFF00000 FFF5FFFF"
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h) copy in new image: "cp.b 200000 FFF00000 60000"
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i) ensure new image is written: "md fff00000"
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k) power cycle the board and confirm new image works.
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