[E3-hacking] Adding write support to pbltool
basicmark at yahoo.com
Sun Jan 29 18:07:31 GMT 2006
--- Jasmine Strong <jasmine at electronpusher.org> wrote:
> On 28 Jan 2006, at 11:16, Jonathan McDowell wrote:
> > I believe you can jump to code in SRAM, but not SDRAM.
> To clarify this: most bootloaders for the OMAP chips don't set up
> the SDRAM controller. For this reason, a small piece of 'trampoline'
> code is normally loaded into SRAM, which doesn't need SDRAM
> refresh cycles, which sets up the SDRAM and loads the rest of
> the image into it. (It also usually sets the clocks and stuff up.)
> You then jump into the (now, hopefully, stable) SDRAM.
Good news guys!
I have managed to create an E3 config for u-boot and now have it up and running on my system. I
have had to hack it a bit to remove the UART init code as I don't know what clock speed they are
running at. (Just the basic's so far, no NAND flash support yet, I think I'll leave that to the
As PBL has kindly initialised the SDRAM I am running from that with no problems :-).
Next step Linux 2.6!
> ex-OMAP architect,
> ex-tremely interested in E3s...
> e3-hacking mailing list
> e3-hacking at earth.li
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