On Friday 14 October 2011, Stephen Warren wrote: > Arnd Bergmann wrote at Friday, October 14, 2011 9:30 AM: > ... > > You mention that tegra30 will require AUTO_ZRELADDR. > > Well, just to be clear, here's the situation I think: > > Tegra20's SDRAM starts at physical address 0. > > Tegra30's SDRAM starts at physical address 2G. > > To support that, we could either: > > a) Introduce a new Kconfig variable for Tegra30, make T20/T30 mutually > exclusive, and update arch/arm/mach-tegra/Makefile.boot to set zreladdr > etc. based on the new Tegra30 config variable too. Then, there's no need > for AUTO_ZRELADDR anywhere. > > b) Have no new config variable, build a unified T20/T30 kernel, leave > Makefile.boot untouched, and rely on using AUTO_ZRELADDR for Tegra30 to > account for the different SDRAM physical addresses. Ok, thanks for the explanation, that makes it much clearer. For completeness, you could also do both of the above and make T20/T30 mutually exclusive unless AUTO_ZRELADDR is set. That might be more complex than necessary, I don't know. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
