OpenWrt Forum Archive

Topic: RT1310 Porting - U-Boot issue

The content of this topic has been archived on 8 Apr 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.

Post #1
yossigo
15 Jan 2018, 08:46

Hi, I've started playing with a RT1310 (aka 5VT1310) SOC board trying to get OpenWrt ported to it.  It has a very old U-Boot which I don't want to touch as I have no JTAG access and don't want to get it bricked.

I'm currently stuck with a problem I can't explain:
- Loading a zImage and executing it directly ("go <addr>") gets me past kernel decompress but fails because <r1> is garbeled so machine id is wrong (unrecognized/unsupported machine ID).
- Using mkimage to create a uImage of the same image (and same load/entry addr), bootm simply hangs and I don't see decompression taking place.

Any ideas what may be wrong?

My goal is to get this going with the original old U-Boot (1.15 with some vendor patches), as I have no JTAG access and wouldn't want to risk bricking it completely.

Post #2
yossigo
15 Jan 2018, 10:40

It turns out that using LZMA for zImage solves this problem.  Not sure why, but it must be something in the vendor's U-Boot code because it affects even early test prints I added before the decompress code.

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