On Mon, Aug 11, 2014 at 03:03:35PM +0200, Michal Simek wrote: > Hi, > > I have got this patch some time ago but I am not still > 100% sure about use case. Anyway Soren uses this mode > that's why let me send this patch and we can discuss > if this can be useful for someone else too. > > The use case is to load U-Boot SPL to do init HW > and then load images via JTAG because RAM is initialized > and then run full u-boot. > There is an option to do HW initialization without > U-Boot SPL but there are some differences and it is just > better to directly use code which will run on the board > when everything is tested.
So in this case, you attach JTAG to the board, halt on reset, reset the board. JTAG load in SPL and fiddle memory so that BOOT_DEVICE_JTAG is set, let SPL run, halt when you see the print (or set a breakpoint for that part, either way), then load U-Boot via JTAG, resume over the while loop, and then debug U-Boot as needed? -- Tom
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