Hello Wolfgang, Albert, On Tuesday 01 February 2011 03:33 PM, Wolfgang Denk wrote: > Dear Aneesh V, > > In message<4d47c1c9.1020...@ti.com> you wrote: >> >>> Why would that be necessary? Just put the BSS segment in SDRAM, and >>> everything is fine, isn't it? >> >> SDRAM is initialized by the SPL. So, bss can not be initialized and >> used until SDRAM initialization is complete. I would prefer to have > > Yes, this is normal. > >> rest of the bss in internal RAM so that it's available as soon as we >> enter C code. > > Well, you probably have to decide if you want an easy solution with > the restictions of the internal RAM size, or a somewhat more complex > solution with much more powerful resources.
I tried putting bss in SDRAM and it works for me. I just had to put a couple of variables explicitly in .data section. However, there is one minor issue that I would like to report. Making .bss disjoint from the rest of the image may break the relocation code in start.S. Currently the assumption is that '__bss_start' indicates the end of .data and hence the image. That will not be the case when .text and .data are in IRAM and .bss in SDRAM. I am not affected because our SPL doesn't need relocation. Best regards, Aneesh _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
