On Wed, Sep 04, 2013 at 11:43:01AM +0300, Oleg Kosheliev wrote: > Hi, Andr? > > >________________________________________ > >From: u-boot-boun...@lists.denx.de [u-boot-boun...@lists.denx.de] on > behalf of Andr? >Schaller [an.sch...@googlemail.com] > >Sent: Wednesday, September 04, 2013 10:09 AM > >To: u-boot@lists.denx.de > >Subject: [U-Boot] SPL binary too large for OMAP4460 OCM > > > >Hi everybody, > > > >I need to add functionality to the SPL code. I tried to implement in a > >memory-saving way, however, the SPL is about 45 kB after compilation. To > >get compilation working, I had to set CONFIG_SPL_MAX_SIZE to (45 * > >1024). Now, the SPL as well as u-boot won't boot. After the device' > >(PandaBoard ES - OMAP4460) reset, nothing happens regarding it's output > >on terminal. > > > >My question: is it theoretically possible to to establish a successfully > >booting SPL with ~45 kB in size for this device? The device' > >on-chip-memory is 56kB so it could fit in there. If so, what needs to be > >configured / tuned to get it working? Are there any other features I > >could omit from the binary to make it smaller? > > > >Thanks a lot, > >Andr? > >_______________________________________________ > >U-Boot mailing list > >U-Boot@lists.denx.de > >http://lists.denx.de/mailman/listinfo/u-boot > > We can use the area 0x40300000 - 0x4030bfff for downloading the SPL image. > If the image exceed this - it leads to corrupting the ROM code stack and > the device hangs up. > See my patch [U-Boot] [RFC PATCH] armv7:omap4-common: Correct check of the > SPL image size. (It's not in mainline. I'll do some corrections and send v2 > soon.) > For HS devices the SPL image is loaded from the address 0x40304350. So we > have 0x4030bfff - 0x40304350 = 0x7CAF = 31,919 bytes for SPL. > The area from 0x40300000 till 0x40304350 in HS devices is used for security > data.
FWIW, this issue is one reason I think we need to stop trying to make GP devices work kinda-sorta like the HS devices do and instead add a CONFIG for HS devices that sets things correctly. -- Tom
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