[U-Boot-Users] Help, how do I decouple the reset address from the hw config word on ppc82xx
Hi,
I've been attempting to build u-boot to run on an embedded planet ep8260 board reasonably sucessfully, however my board profile has flash starting at 0xFF000000, the reset vector is of course at 0xFFF00100. I've been scanning the code and build files looking for a reference to decouple the hardware configuration word at 0xFF00000 and the reset vector at 0xFFF00100 so far with no real sucess.
Is there a mechanism within the build to do this?
Thx, I hope this makes sense.
Mark Doherty
arca technologies 2 Trench Road Mallusk, Belfast Northern Ireland BT36 4TY
In message 9901EE1E8F8BD3119109009027A1B5F596AD5B@DIGINET2 you wrote:
I've been attempting to build u-boot to run on an embedded planet ep8260 board reasonably sucessfully, however my board profile has flash starting at 0xFF000000, the reset vector is of course at 0xFFF00100. I've been
There are two errors in this sentence.
Forst, there is no fixed physcal address map. The address map of your system is defined by whatever you program into your memory controller registers. You don't have to map you flash at 0xFF000000; you could chose any other address as well (but this isn't your problem here). The second error is the "of course at 0xFFF00100". It could be at 0x100 as well, depending on the CIP/BMS settings in your HRCW. (Actually 0x100 seems to be a much more "natural" setting to me).
scanning the code and build files looking for a reference to decouple the hardware configuration word at 0xFF00000 and the reset vector at 0xFFF00100 so far with no real sucess.
This is your third error. You try to do something that is not necessary. Read the User's Manual about how the memory controller works, especially how boot memory space is defined (initial settings of BR0[BA]).
Best regards,
Wolfgang Denk
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Mark Doherty -
Wolfgang Denk