[U-Boot] u-boot for SPEAr1310

[Marek Vasut <marek.vasut@gmail.com>]

> On Thursday 23 February 2012 15:49:02 Marek Vasut wrote:
> > > My experience is mostly SPEAr600 only right now. Not sure if there are
> > > bigger differences between those SoC's in the BootROM.
> > 
> > I believe the spear600 is totally different from 1300. But, simple:
> > 
> > reset halt ; load ... ; go ...
> > 
> > combo should work I believe. In case you're loading some U-Boot SPL, it's
> > very good idea to put an "asm volatile("x : b x");" line into the SPL to
> > make the CPU loop instead of try loading uboot. Since if the CPU is
> > looping, you can break it with BDI, if it isn't looping and jumps to some
> > garbage, it usually ends in undefined state and bootrom might further
> > tamper with the CPU configuration.
> 
> Yes, good point. But a "STARTUP RESET ;no code is executed after reset"
> seems to solve this problem as well. At least for me on SPEAr600. I know.
> Since I broke my SPL from time to time. ;)

Ah that's good idea indeed, though sometimes you might want to break the 
execution after the BootROM, since bootrom might be doing some mandatory chip 
init.

M

> 
> Best regards,
> Stefan
> 
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