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Observer philipmolloy
Observer
341 Views
Registered: ‎06-28-2018

BOOT.bin version and boot ROM MultiBoot with a FAT filesystem on eMMC

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I'm trying to figure out how to upgrade the `boot.bin` from Linux. In order to do so I need to know whether there is a new version of the `boot.bin`.

My first thought was to add a version to the filename, but it looks like the boot ROM won't find the file. MultiBoot using raw flash is well documented in the Software Developers Guide and TRM, but the description for SD/eMMC is only explained in a diagram and a bit vague:

Convert the offset value into string and concatenate it with boot.bin to get a new file name. Read the boot header from 0x0 to 0x48 usingthis new file name.

I assume this would look like `boot.bin1`, `boot.bin2`, ... `boot.bin<n>`.

Otherwise is there a way to store a version in the `boot.bin` using `bootgen`? It seems like the user defined field in the boot header (i.e. `udf_bh`) makes the most sense, which is documented in the SDG, but not in `bootgen -bif_help`. I'm lookg at `bootgen` 2018.2 and SDG from June 22, 2018. I don’t see a newer version of the SDG. I'm installing 2018.3 right now and will check the version of `bootgen` included in that release when it is done.

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Xilinx Employee
Xilinx Employee
322 Views
Registered: ‎10-11-2011

Re: BOOT.bin version and boot ROM MultiBoot with a FAT filesystem on eMMC

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The name of the file is boot000X.bin.

I think "udf_bh" is a good candidate for user specific data like version.

Maybe UG1283 can help with the usage (page 121).

 

 

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Xilinx Employee
Xilinx Employee
323 Views
Registered: ‎10-11-2011

Re: BOOT.bin version and boot ROM MultiBoot with a FAT filesystem on eMMC

Jump to solution

The name of the file is boot000X.bin.

I think "udf_bh" is a good candidate for user specific data like version.

Maybe UG1283 can help with the usage (page 121).