50 lines
1.7 KiB
Plaintext
50 lines
1.7 KiB
Plaintext
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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